/* roulang page: index */
:root {
            --bg-primary: #0F1419;
            --bg-panel: #1A2029;
            --bg-panel-alt: #1E2630;
            --bg-footer: #0A0E12;
            --text-primary: #F5F7FA;
            --text-secondary: #9CA3AF;
            --text-muted: #6B7280;
            --accent-green: #00E676;
            --accent-green-dim: rgba(0, 230, 118, 0.12);
            --accent-orange: #FF6B35;
            --accent-orange-hover: #FF8250;
            --accent-red: #EF4444;
            --border-color: #2A323C;
            --border-hover: #3D4A57;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 14px 36px rgba(0, 0, 0, 0.5);
            --spacing-section: 56px;
            --spacing-card: 20px;
            --font-family: 'PingFang SC', 'HarmonyOS Sans SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            --font-num: 'SF Mono', 'Roboto Mono', 'Consolas', 'Courier New', monospace;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            color: inherit;
            border: none;
            outline: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        @media (max-width: 1024px) {
            .container {
                padding: 0 20px;
            }
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
            :root {
                --spacing-section: 36px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 12px;
            }
            :root {
                --spacing-section: 28px;
            }
        }

        section {
            padding: var(--spacing-section) 0;
            position: relative;
        }

        section + section {
            border-top: 1px solid var(--border-color);
        }

        .section-header {
            margin-bottom: 32px;
        }

        .section-header h2 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 10px;
            letter-spacing: 0.02em;
            color: var(--text-primary);
        }

        .section-header p {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 720px;
            line-height: 1.7;
        }

        @media (max-width: 768px) {
            .section-header h2 {
                font-size: 19px;
            }
            .section-header p {
                font-size: 14px;
            }
        }

        /* Header / Navigation */
        header.site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(15, 20, 25, 0.82);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-color);
            padding: 10px 0;
            transition: background 0.3s ease, box-shadow 0.3s ease;
        }

        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: nowrap;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            font-weight: 700;
            font-size: 18px;
            letter-spacing: 0.03em;
            color: var(--text-primary);
            white-space: nowrap;
        }

        .nav-logo .logo-icon {
            width: 32px;
            height: 32px;
            background: var(--accent-green);
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--bg-primary);
            font-size: 15px;
            font-weight: 800;
            flex-shrink: 0;
        }

        .nav-logo:hover {
            color: var(--accent-green);
        }

        .nav-middle {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            flex-shrink: 1;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .nav-middle::-webkit-scrollbar {
            display: none;
        }

        .nav-middle li {
            white-space: nowrap;
        }

        .nav-middle a {
            display: flex;
            align-items: center;
            gap: 7px;
            padding: 8px 14px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            border-bottom: 2px solid transparent;
            transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
        }

        .nav-middle a .nav-icon {
            font-size: 14px;
            width: 18px;
            text-align: center;
            flex-shrink: 0;
        }

        .nav-middle a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-middle a.active {
            color: var(--accent-green);
            border-bottom-color: var(--accent-green);
            background: transparent;
        }

        .nav-right {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .nav-status {
            display: flex;
            align-items: center;
            gap: 7px;
            font-size: 13px;
            color: var(--text-secondary);
            white-space: nowrap;
        }

        .nav-status .status-dot {
            width: 8px;
            height: 8px;
            background: var(--accent-green);
            border-radius: 50%;
            animation: pulse-dot 2s infinite ease-in-out;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.5;
                transform: scale(1.3);
            }
        }

        .nav-bell {
            position: relative;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--text-secondary);
            transition: background 0.2s, color 0.2s;
            flex-shrink: 0;
        }

        .nav-bell:hover {
            background: rgba(255, 255, 255, 0.1);
            color: var(--text-primary);
        }

        .nav-bell .badge-num {
            position: absolute;
            top: -2px;
            right: -2px;
            background: var(--accent-red);
            color: #fff;
            font-size: 10px;
            font-weight: 700;
            border-radius: 50%;
            min-width: 18px;
            height: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 0 4px;
            border: 2px solid var(--bg-primary);
            font-family: var(--font-num);
        }

        .nav-cta {
            background: var(--accent-orange);
            color: #fff;
            padding: 9px 18px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: background 0.2s, transform 0.2s;
            flex-shrink: 0;
        }

        .nav-cta:hover {
            background: var(--accent-orange-hover);
            transform: translateY(-1px);
        }

        .nav-cta:focus-visible,
        .nav-logo:focus-visible,
        .nav-middle a:focus-visible,
        .nav-bell:focus-visible {
            outline: 2px solid var(--accent-green);
            outline-offset: 2px;
        }

        .nav-toggle {
            display: none;
            width: 36px;
            height: 36px;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.06);
            align-items: center;
            justify-content: center;
            flex-direction: column;
            gap: 4px;
            flex-shrink: 0;
            transition: background 0.2s;
        }

        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.12);
        }

        .nav-toggle span {
            width: 18px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: transform 0.3s, opacity 0.3s;
        }

        @media (max-width: 1024px) {
            .nav-middle {
                position: fixed;
                top: 56px;
                left: 0;
                right: 0;
                background: rgba(15, 20, 25, 0.96);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                border-bottom: 1px solid var(--border-color);
                padding: 16px 20px;
                flex-direction: column;
                align-items: flex-start;
                gap: 4px;
                transform: translateY(-120%);
                transition: transform 0.35s ease;
                z-index: 999;
                max-height: 70vh;
                overflow-y: auto;
            }
            .nav-middle.open {
                transform: translateY(0);
            }
            .nav-middle a {
                padding: 12px 14px;
                width: 100%;
                border-bottom: none;
                border-left: 3px solid transparent;
                font-size: 15px;
            }
            .nav-middle a.active {
                border-left-color: var(--accent-green);
                border-bottom-color: transparent;
                background: rgba(0, 230, 118, 0.06);
            }
            .nav-toggle {
                display: flex;
            }
            .nav-status {
                display: none;
            }
        }

        @media (max-width: 520px) {
            .nav-cta {
                padding: 8px 13px;
                font-size: 13px;
            }
            .nav-logo {
                font-size: 16px;
            }
            .nav-logo .logo-icon {
                width: 28px;
                height: 28px;
                font-size: 13px;
            }
            .nav-middle {
                top: 52px;
            }
        }

        /* Hero Bento */
        .hero-section {
            padding: 60px 0 56px;
            position: relative;
            overflow: hidden;
            background: url('/assets/images/3088b5a60ccacbd0.webp') center / cover no-repeat;
            background-color: var(--bg-primary);
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(160deg, rgba(15, 20, 25, 0.88) 0%, rgba(15, 20, 25, 0.72) 45%, rgba(15, 20, 25, 0.93) 100%);
            z-index: 1;
        }

        .hero-section .container {
            position: relative;
            z-index: 2;
        }

        .hero-bento {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            grid-template-rows: auto auto;
            gap: 16px;
        }

        .hero-bento-main {
            grid-column: 1 / 2;
            grid-row: 1 / 3;
            background: rgba(26, 32, 41, 0.72);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: 1px solid rgba(42, 50, 60, 0.8);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            min-height: 280px;
        }

        .hero-bento-main h1 {
            font-size: 34px;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
            color: var(--text-primary);
        }

        .hero-bento-main h1 .highlight-green {
            color: var(--accent-green);
        }

        .hero-bento-main p {
            font-size: 15px;
            color: var(--text-secondary);
            margin-bottom: 24px;
            max-width: 500px;
            line-height: 1.8;
        }

        .hero-bento-cta-row {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 22px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 600;
            transition: background 0.2s, transform 0.2s, box-shadow 0.2s, border-color 0.2s;
            text-align: center;
            line-height: 1.2;
            border: 1px solid transparent;
        }

        .btn-primary {
            background: var(--accent-orange);
            color: #fff;
            border-color: var(--accent-orange);
        }

        .btn-primary:hover {
            background: var(--accent-orange-hover);
            border-color: var(--accent-orange-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(255, 107, 53, 0.3);
        }

        .btn-secondary {
            background: transparent;
            color: var(--text-primary);
            border-color: var(--border-color);
        }

        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: var(--border-hover);
            transform: translateY(-2px);
        }

        .btn-green {
            background: var(--accent-green);
            color: var(--bg-primary);
            border-color: var(--accent-green);
        }

        .btn-green:hover {
            background: #00F08A;
            border-color: #00F08A;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0, 230, 118, 0.28);
        }

        .btn:focus-visible {
            outline: 3px solid var(--accent-green);
            outline-offset: 3px;
        }

        .hero-bento-small {
            background: rgba(26, 32, 41, 0.72);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: 1px solid rgba(42, 50, 60, 0.8);
            border-radius: var(--radius-lg);
            padding: 22px 20px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            min-height: 130px;
        }

        .hero-bento-small .label-tag {
            font-size: 11px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--accent-green);
            margin-bottom: 8px;
            opacity: 0.8;
        }

        .hero-bento-small .small-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
        }

        .hero-bento-small .small-desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        .hero-bento-cta-strip {
            grid-column: 2 / 4;
            grid-row: 2 / 3;
            background: rgba(0, 230, 118, 0.1);
            border: 1px solid rgba(0, 230, 118, 0.3);
            border-radius: var(--radius-lg);
            padding: 18px 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            flex-wrap: wrap;
        }

        .hero-bento-cta-strip .strip-text {
            font-size: 13px;
            color: var(--text-secondary);
        }
        .hero-bento-cta-strip .strip-text strong {
            color: var(--accent-green);
            font-weight: 700;
        }

        .hero-bento-cta-strip .btn {
            padding: 9px 16px;
            font-size: 13px;
        }

        @media (max-width: 1024px) {
            .hero-bento {
                grid-template-columns: 1fr 1fr;
                grid-template-rows: auto;
            }
            .hero-bento-main {
                grid-column: 1 / 3;
                grid-row: 1;
                min-height: auto;
            }
            .hero-bento-small {
                grid-row: 2;
                min-height: auto;
            }
            .hero-bento-cta-strip {
                grid-column: 1 / 3;
                grid-row: 3;
            }
            .hero-bento-main h1 {
                font-size: 28px;
            }
        }

        @media (max-width: 768px) {
            .hero-section {
                padding: 40px 0 36px;
            }
            .hero-bento {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .hero-bento-main {
                grid-column: 1;
                grid-row: 1;
                padding: 22px 18px;
            }
            .hero-bento-small {
                grid-column: 1;
                grid-row: auto;
                min-height: auto;
                padding: 16px 18px;
            }
            .hero-bento-cta-strip {
                grid-column: 1;
                grid-row: auto;
                flex-direction: column;
                align-items: flex-start;
                padding: 16px 18px;
            }
            .hero-bento-main h1 {
                font-size: 24px;
            }
            .hero-bento-main p {
                font-size: 14px;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
            .hero-bento-cta-row {
                flex-direction: column;
                width: 100%;
            }
            .hero-bento-cta-strip .btn {
                width: 100%;
            }
        }

        @media (max-width: 520px) {
            .hero-bento-main h1 {
                font-size: 21px;
            }
            .hero-bento-main p {
                font-size: 13px;
            }
            .hero-bento-small .small-title {
                font-size: 14px;
            }
            .hero-bento-small .small-desc {
                font-size: 12px;
            }
        }

        /* Real-time data panel */
        .rt-panel {
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }

        .rt-panel-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            background: var(--bg-panel-alt);
            border-bottom: 1px solid var(--border-color);
            flex-wrap: wrap;
            gap: 10px;
        }

        .rt-panel-header .rt-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .rt-panel-header .rt-title .live-dot {
            width: 10px;
            height: 10px;
            background: var(--accent-green);
            border-radius: 50%;
            animation: pulse-dot 1.6s infinite ease-in-out;
            flex-shrink: 0;
        }

        .rt-panel-header .rt-tag {
            font-size: 12px;
            color: var(--accent-green);
            background: var(--accent-green-dim);
            padding: 4px 12px;
            border-radius: 20px;
            font-weight: 500;
        }

        .rt-table-wrap {
            overflow-x: auto;
        }

        .rt-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 640px;
        }

        .rt-table thead th {
            padding: 12px 16px;
            text-align: left;
            font-size: 12px;
            font-weight: 600;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.06em;
            background: rgba(255, 255, 255, 0.02);
            border-bottom: 1px solid var(--border-color);
            white-space: nowrap;
        }

        .rt-table tbody td {
            padding: 13px 16px;
            font-size: 14px;
            border-bottom: 1px solid rgba(42, 50, 60, 0.5);
            color: var(--text-secondary);
            white-space: nowrap;
        }
        .rt-table tbody tr:last-child td {
            border-bottom: none;
        }
        .rt-table tbody tr:hover {
            background: rgba(255, 255, 255, 0.03);
        }

        .rt-table .score-num {
            font-family: var(--font-num);
            font-size: 18px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 0.04em;
        }
        .rt-table .score-num.green {
            color: var(--accent-green);
        }
        .rt-table .score-num.red {
            color: var(--accent-red);
        }
        .rt-table .status-badge {
            display: inline-flex;
            padding: 3px 10px;
            border-radius: 4px;
            font-size: 12px;
            font-weight: 600;
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-secondary);
        }
        .rt-table .status-badge.live {
            background: var(--accent-green-dim);
            color: var(--accent-green);
        }

        @media (max-width: 768px) {
            .rt-panel-header {
                padding: 14px 16px;
                gap: 6px;
            }
            .rt-table thead th {
                padding: 10px 12px;
                font-size: 11px;
            }
            .rt-table tbody td {
                padding: 11px 12px;
                font-size: 13px;
            }
            .rt-table .score-num {
                font-size: 16px;
            }
        }

        /* Cards grid */
        .card-grid {
            display: grid;
            gap: 16px;
        }

        .card-grid.cols-4 {
            grid-template-columns: repeat(4, 1fr);
        }
        .card-grid.cols-3 {
            grid-template-columns: repeat(3, 1fr);
        }
        .card-grid.cols-2 {
            grid-template-columns: repeat(2, 1fr);
        }

        @media (max-width: 1024px) {
            .card-grid.cols-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .card-grid.cols-3 {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .card-grid.cols-4,
            .card-grid.cols-3,
            .card-grid.cols-2 {
                grid-template-columns: 1fr;
            }
        }

        .feature-card,
        .scenario-card,
        .case-card,
        .price-card,
        .info-card,
        .topic-card {
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: var(--spacing-card);
            box-shadow: var(--shadow-card);
            transition: background 0.25s, border-color 0.25s, transform 0.25s, box-shadow 0.25s;
        }

        .feature-card:hover,
        .scenario-card:hover,
        .case-card:hover,
        .topic-card:hover,
        .info-card:hover {
            border-color: var(--accent-green);
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
            background: var(--bg-panel-alt);
        }

        .feature-card .card-icon,
        .scenario-card .card-icon,
        .topic-card .card-icon {
            font-size: 22px;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background: rgba(0, 230, 118, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-green);
            margin-bottom: 14px;
            flex-shrink: 0;
        }

        .feature-card h3,
        .scenario-card h3,
        .case-card h3,
        .topic-card h3,
        .info-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .feature-card p,
        .scenario-card p,
        .case-card p,
        .topic-card p,
        .info-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* Screenshot/demo area */
        .demo-area {
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 28px;
            align-items: center;
        }

        .demo-visual {
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            position: relative;
            box-shadow: var(--shadow-card);
        }

        .demo-visual img {
            width: 100%;
            height: auto;
            border-radius: 0;
        }

        .demo-visual::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(15, 20, 25, 0.7) 100%);
            pointer-events: none;
        }

        .demo-text {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .demo-text h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
        }
        .demo-text p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
        }
        .demo-text ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .demo-text ul li {
            font-size: 14px;
            color: var(--text-secondary);
            padding-left: 20px;
            position: relative;
        }
        .demo-text ul li::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 8px;
            height: 8px;
            background: var(--accent-green);
            border-radius: 50%;
        }

        @media (max-width: 768px) {
            .demo-area {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .demo-text h3 {
                font-size: 17px;
            }
        }

        /* Case cards */
        .case-card {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .case-card .case-tag {
            display: inline-flex;
            align-self: flex-start;
            font-size: 12px;
            font-weight: 600;
            background: rgba(255, 107, 53, 0.14);
            color: var(--accent-orange);
            padding: 4px 10px;
            border-radius: 4px;
        }
        .case-card .case-meta {
            font-size: 12px;
            color: var(--text-muted);
            font-family: var(--font-num);
            letter-spacing: 0.03em;
        }

        /* Price cards */
        .price-card {
            display: flex;
            flex-direction: column;
            gap: 12px;
            position: relative;
            transition: border-color 0.25s, transform 0.25s, box-shadow 0.25s, background 0.25s;
        }
        .price-card:hover {
            border-color: var(--accent-green);
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        .price-card.featured {
            border-color: var(--accent-orange);
            background: var(--bg-panel-alt);
            box-shadow: 0 0 0 1px var(--accent-orange), var(--shadow-card);
        }
        .price-card.featured:hover {
            border-color: var(--accent-orange-hover);
            box-shadow: 0 0 0 1px var(--accent-orange-hover), var(--shadow-hover);
        }

        .price-card .price-tag {
            font-size: 12px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--accent-orange);
        }
        .price-card .price-value {
            font-family: var(--font-num);
            font-size: 30px;
            font-weight: 800;
            color: var(--text-primary);
        }
        .price-card .price-value .currency {
            font-size: 16px;
            color: var(--text-secondary);
            margin-right: 2px;
        }
        .price-card .price-period {
            font-size: 13px;
            color: var(--text-muted);
        }
        .price-card ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
            flex: 1;
        }
        .price-card ul li {
            font-size: 13px;
            color: var(--text-secondary);
            padding-left: 18px;
            position: relative;
            line-height: 1.5;
        }
        .price-card ul li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: var(--accent-green);
            font-weight: 700;
            font-size: 12px;
        }
        .price-card .btn {
            width: 100%;
        }

        /* Testimonial wall */
        .testimonial-wall {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
            gap: 16px;
        }

        .testimonial-card {
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 18px 16px;
            transition: border-color 0.25s, transform 0.25s, background 0.25s;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .testimonial-card:hover {
            border-color: var(--border-hover);
            background: var(--bg-panel-alt);
            transform: translateY(-2px);
        }
        .testimonial-card .testimonial-avatar {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--accent-green-dim);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--accent-green);
            font-weight: 700;
            flex-shrink: 0;
        }
        .testimonial-card .testimonial-text {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .testimonial-card .testimonial-name {
            font-size: 12px;
            font-weight: 600;
            color: var(--text-primary);
        }
        .testimonial-card .testimonial-role {
            font-size: 11px;
            color: var(--text-muted);
        }

        /* User reputation */
        .reputation-panel {
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            display: flex;
            align-items: center;
            gap: 28px;
            flex-wrap: wrap;
            box-shadow: var(--shadow-card);
        }
        .reputation-score {
            display: flex;
            align-items: center;
            gap: 18px;
            flex-shrink: 0;
        }
        .reputation-score .score-big {
            font-family: var(--font-num);
            font-size: 48px;
            font-weight: 800;
            color: var(--accent-green);
            line-height: 1;
        }
        .reputation-score .score-detail {
            font-size: 13px;
            color: var(--text-secondary);
        }
        .reputation-score .score-detail .star-row {
            color: var(--accent-orange);
            font-size: 16px;
            letter-spacing: 2px;
        }
        .reputation-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            flex: 1;
        }
        .reputation-tags .tag-item {
            background: rgba(255, 255, 255, 0.05);
            color: var(--text-secondary);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 13px;
            transition: background 0.2s, color 0.2s;
        }
        .reputation-tags .tag-item:hover {
            background: var(--accent-green-dim);
            color: var(--accent-green);
        }

        @media (max-width: 768px) {
            .reputation-panel {
                flex-direction: column;
                align-items: flex-start;
                gap: 16px;
                padding: 22px 18px;
            }
            .reputation-score {
                gap: 12px;
            }
            .reputation-score .score-big {
                font-size: 38px;
            }
        }

        /* News list */
        .news-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 16px;
        }
        .news-card {
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color 0.25s, transform 0.25s, box-shadow 0.25s;
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            border-color: var(--accent-green);
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
        }
        .news-card img {
            width: 100%;
            height: 160px;
            object-fit: cover;
            border-radius: 0;
        }
        .news-card .news-body {
            padding: 16px 18px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            flex: 1;
        }
        .news-card .news-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.5;
        }
        .news-card .news-desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
        }
        .news-card .news-meta {
            font-size: 12px;
            color: var(--text-muted);
            font-family: var(--font-num);
        }

        @media (max-width: 520px) {
            .news-card img {
                height: 140px;
            }
        }

        /* Brand intro */
        .brand-intro {
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            box-shadow: var(--shadow-card);
        }
        .brand-intro h2 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
        }
        .brand-intro p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.9;
            margin-bottom: 12px;
        }
        .brand-intro p:last-child {
            margin-bottom: 0;
        }

        @media (max-width: 768px) {
            .brand-intro {
                padding: 22px 18px;
            }
            .brand-intro h2 {
                font-size: 18px;
            }
            .brand-intro p {
                font-size: 14px;
                line-height: 1.8;
            }
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
            max-width: 850px;
        }
        .faq-item {
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color 0.25s, background 0.25s;
        }
        .faq-item:hover {
            border-color: var(--border-hover);
        }
        .faq-item.open {
            border-color: var(--accent-green);
            background: var(--bg-panel-alt);
        }
        .faq-item summary {
            list-style: none;
            cursor: pointer;
            padding: 16px 20px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            user-select: none;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '+';
            font-size: 20px;
            color: var(--accent-green);
            font-weight: 700;
            transition: transform 0.25s;
            flex-shrink: 0;
        }
        .faq-item.open summary::after {
            content: '−';
        }
        .faq-item .faq-answer {
            padding: 0 20px 18px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            animation: faq-fade-in 0.3s ease;
        }
        @keyframes faq-fade-in {
            from {
                opacity: 0;
                transform: translateY(-4px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @media (max-width: 768px) {
            .faq-item summary {
                padding: 14px 16px;
                font-size: 14px;
            }
            .faq-item .faq-answer {
                padding: 0 16px 16px;
                font-size: 13px;
            }
        }

        /* CTA full width */
        .cta-full {
            background: linear-gradient(135deg, rgba(0, 230, 118, 0.08), rgba(255, 107, 53, 0.08)), var(--bg-panel);
            border: 1px solid rgba(0, 230, 118, 0.25);
            border-radius: var(--radius-lg);
            padding: 36px 28px;
            text-align: center;
            box-shadow: var(--shadow-card);
        }
        .cta-full h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 10px;
        }
        .cta-full p {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto 22px;
            line-height: 1.8;
        }
        .cta-full .cta-row {
            display: flex;
            gap: 12px;
            justify-content: center;
            flex-wrap: wrap;
        }

        @media (max-width: 768px) {
            .cta-full {
                padding: 26px 18px;
            }
            .cta-full h2 {
                font-size: 19px;
            }
            .cta-full p {
                font-size: 14px;
            }
            .cta-full .cta-row {
                flex-direction: column;
            }
            .cta-full .cta-row .btn {
                width: 100%;
            }
        }

        /* Topics */
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
            gap: 14px;
        }
        .topic-card {
            padding: 16px 14px;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .topic-card h3 {
            font-size: 14px;
            margin-bottom: 4px;
        }
        .topic-card p {
            font-size: 13px;
        }
        .topic-card .topic-tag {
            font-size: 11px;
            color: var(--accent-green);
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        /* Parameter table */
        .param-table {
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }
        .param-table table {
            width: 100%;
            border-collapse: collapse;
        }
        .param-table th,
        .param-table td {
            padding: 12px 18px;
            text-align: left;
            font-size: 14px;
            border-bottom: 1px solid rgba(42, 50, 60, 0.5);
        }
        .param-table tr:last-child th,
        .param-table tr:last-child td {
            border-bottom: none;
        }
        .param-table th {
            color: var(--text-muted);
            font-weight: 600;
            background: rgba(255, 255, 255, 0.02);
            width: 35%;
            white-space: nowrap;
        }
        .param-table td {
            color: var(--text-secondary);
        }
        .param-table td strong {
            color: var(--accent-green);
            font-weight: 700;
        }

        @media (max-width: 768px) {
            .param-table th,
            .param-table td {
                padding: 10px 12px;
                font-size: 13px;
            }
            .param-table th {
                width: 40%;
            }
        }

        /* Entry matrix */
        .entry-matrix {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
            gap: 12px;
        }
        .entry-btn {
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 16px 14px;
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            transition: border-color 0.25s, background 0.25s, transform 0.25s;
        }
        .entry-btn:hover {
            border-color: var(--accent-green);
            background: var(--bg-panel-alt);
            transform: translateY(-2px);
        }
        .entry-btn .entry-icon {
            font-size: 18px;
            color: var(--accent-green);
            width: 24px;
            text-align: center;
            flex-shrink: 0;
        }

        @media (max-width: 520px) {
            .entry-matrix {
                grid-template-columns: 1fr;
            }
        }

        /* Social proof strips */
        .social-proof {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 22px 24px;
            box-shadow: var(--shadow-card);
        }
        .social-proof .proof-item {
            display: flex;
            flex-direction: column;
            gap: 4px;
            min-width: 100px;
        }
        .social-proof .proof-num {
            font-family: var(--font-num);
            font-size: 26px;
            font-weight: 800;
            color: var(--accent-green);
            line-height: 1.2;
        }
        .social-proof .proof-label {
            font-size: 12px;
            color: var(--text-secondary);
        }

        @media (max-width: 768px) {
            .social-proof {
                gap: 14px;
                padding: 18px 16px;
            }
            .social-proof .proof-item {
                min-width: 80px;
            }
            .social-proof .proof-num {
                font-size: 22px;
            }
        }

        /* Footer */
        footer.site-footer {
            background: var(--bg-footer);
            border-top: 1px solid var(--border-color);
            padding: 40px 0 24px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 24px;
            margin-bottom: 28px;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.03em;
        }
        .footer-col p,
        .footer-col li,
        .footer-col a {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .footer-col a:hover {
            color: var(--accent-green);
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 17px;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        .footer-logo .logo-icon {
            width: 28px;
            height: 28px;
            background: var(--accent-green);
            border-radius: 5px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--bg-primary);
            font-size: 13px;
            font-weight: 800;
        }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 18px;
            text-align: center;
            font-size: 12px;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-muted);
        }
        .footer-bottom a:hover {
            color: var(--accent-green);
        }

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .footer-bottom {
                font-size: 11px;
            }
        }

        /* Utility */
        .text-green {
            color: var(--accent-green);
        }
        .text-orange {
            color: var(--accent-orange);
        }
        .text-red {
            color: var(--accent-red);
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }

        /* Transition for hover */
        .btn,
        .feature-card,
        .scenario-card,
        .case-card,
        .price-card,
        .topic-card,
        .info-card,
        .news-card,
        .entry-btn,
        .testimonial-card,
        .nav-middle a,
        .nav-bell,
        .nav-cta {
            transition: all 0.25s ease;
        }

/* roulang page: category1 */
:root {
            --bg-primary: #0F1419;
            --bg-panel: #1A2029;
            --bg-panel-alt: #1E2630;
            --bg-footer: #0A0E12;
            --text-primary: #F5F7FA;
            --text-secondary: #9CA3AF;
            --text-muted: #6B7280;
            --accent-green: #00E676;
            --accent-green-dim: rgba(0, 230, 118, 0.12);
            --accent-orange: #FF6B35;
            --accent-orange-hover: #FF8250;
            --accent-red: #EF4444;
            --border-color: #2A323C;
            --border-hover: #3D4A57;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 14px 36px rgba(0, 0, 0, 0.5);
            --spacing-section: 56px;
            --spacing-card: 20px;
            --font-family: 'PingFang SC', 'HarmonyOS Sans SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            --font-num: 'SF Mono', 'Roboto Mono', 'Consolas', 'Courier New', monospace;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            color: inherit;
            border: none;
            outline: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        section {
            padding: var(--spacing-section) 0;
            position: relative;
        }

        section+section {
            border-top: 1px solid var(--border-color);
        }

        .section-header {
            margin-bottom: 32px;
        }

        .section-header h2 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 10px;
            letter-spacing: 0.02em;
            color: var(--text-primary);
        }

        .section-header p {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 720px;
            line-height: 1.7;
        }

        /* Header / Navigation */
        header.site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(15, 20, 25, 0.82);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-color);
            padding: 10px 0;
            transition: background 0.3s ease, box-shadow 0.3s ease;
        }

        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: nowrap;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            font-weight: 700;
            font-size: 18px;
            letter-spacing: 0.03em;
            color: var(--text-primary);
            white-space: nowrap;
        }

        .nav-logo .logo-icon {
            width: 32px;
            height: 32px;
            background: var(--accent-green);
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--bg-primary);
            font-size: 15px;
            font-weight: 800;
            flex-shrink: 0;
        }

        .nav-logo:hover {
            color: var(--accent-green);
        }

        .nav-middle {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            flex-shrink: 1;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .nav-middle::-webkit-scrollbar {
            display: none;
        }

        .nav-middle li {
            white-space: nowrap;
        }

        .nav-middle a {
            display: flex;
            align-items: center;
            gap: 7px;
            padding: 8px 14px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            border-bottom: 2px solid transparent;
            transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
        }

        .nav-middle a .nav-icon {
            font-size: 14px;
            width: 18px;
            text-align: center;
            flex-shrink: 0;
        }

        .nav-middle a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-middle a.active {
            color: var(--accent-green);
            border-bottom-color: var(--accent-green);
            background: transparent;
        }

        .nav-right {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .nav-status {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            color: var(--text-secondary);
            white-space: nowrap;
        }

        .status-dot {
            width: 8px;
            height: 8px;
            background: var(--accent-green);
            border-radius: 50%;
            animation: pulse-dot 2s infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.35;
            }
        }

        .nav-bell {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            font-size: 16px;
            border-radius: 50%;
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            transition: border-color 0.2s ease, background 0.2s ease;
        }

        .nav-bell:hover {
            border-color: var(--border-hover);
            background: var(--bg-panel-alt);
        }

        .badge-num {
            position: absolute;
            top: -4px;
            right: -4px;
            min-width: 16px;
            height: 16px;
            background: var(--accent-orange);
            color: #fff;
            font-size: 10px;
            font-weight: 700;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 0 4px;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            background: var(--accent-orange);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            white-space: nowrap;
            transition: background 0.2s ease, transform 0.2s ease;
        }

        .nav-cta:hover {
            background: var(--accent-orange-hover);
            color: #fff;
            transform: translateY(-1px);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: var(--radius-sm);
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
        }

        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        /* Breadcrumb + Category H1 */
        .page-head {
            padding: 36px 0 24px;
            background: linear-gradient(180deg, rgba(0, 230, 118, 0.04) 0%, transparent 100%);
            border-bottom: 1px solid var(--border-color);
        }

        .page-head .container {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
        }

        .page-head-left {
            max-width: 680px;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-secondary);
            transition: color 0.2s ease;
        }

        .breadcrumb a:hover {
            color: var(--accent-green);
        }

        .breadcrumb .sep {
            color: var(--text-muted);
            font-size: 11px;
        }

        .breadcrumb .current {
            color: var(--accent-green);
            font-weight: 500;
        }

        .page-head h1 {
            font-size: 28px;
            font-weight: 700;
            letter-spacing: 0.02em;
            margin-bottom: 12px;
            color: var(--text-primary);
        }

        .page-head-desc {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 620px;
        }

        .page-head-tags {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }

        .page-head-tag {
            padding: 6px 14px;
            font-size: 12px;
            color: var(--text-secondary);
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: 20px;
            white-space: nowrap;
        }

        .page-head-tag.highlight {
            color: var(--accent-green);
            border-color: var(--accent-green);
            background: var(--accent-green-dim);
        }

        /* Category body layout */
        .category-body {
            padding: 36px 0 var(--spacing-section);
        }

        .category-body .container {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 32px;
            align-items: start;
        }

        /* Score card list */
        .score-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .score-card {
            display: flex;
            gap: 18px;
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 16px;
            transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
        }

        .score-card:hover {
            border-color: var(--accent-green);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .score-card-img {
            width: 160px;
            height: 100px;
            flex-shrink: 0;
            border-radius: var(--radius-sm);
            overflow: hidden;
            background: var(--bg-panel-alt);
        }

        .score-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius-sm);
        }

        .score-card-body {
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            gap: 8px;
            min-width: 0;
        }

        .score-card-top {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }

        .score-badge {
            display: inline-flex;
            align-items: center;
            padding: 3px 10px;
            font-size: 11px;
            font-weight: 600;
            border-radius: 4px;
            white-space: nowrap;
        }

        .score-badge.live {
            background: var(--accent-green-dim);
            color: var(--accent-green);
        }

        .score-badge.finished {
            background: rgba(156, 163, 175, 0.12);
            color: var(--text-secondary);
        }

        .score-badge.halftime {
            background: rgba(255, 107, 53, 0.12);
            color: var(--accent-orange);
        }

        .score-card-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.5;
        }

        .score-card-summary {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .score-card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 12px;
            color: var(--text-muted);
        }

        .score-card-meta .date-tag {
            color: var(--text-secondary);
        }

        .score-card-meta .score-mini {
            font-family: var(--font-num);
            font-weight: 700;
            color: var(--accent-green);
            font-size: 14px;
        }

        /* Sidebar */
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 20px;
            position: sticky;
            top: 80px;
        }

        .side-panel {
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 20px;
        }

        .side-panel h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .side-stat-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }

        .side-stat-item {
            background: var(--bg-panel-alt);
            border-radius: var(--radius-sm);
            padding: 14px 12px;
            text-align: center;
        }

        .side-stat-item .stat-num {
            font-family: var(--font-num);
            font-size: 24px;
            font-weight: 700;
            color: var(--accent-green);
            display: block;
            margin-bottom: 4px;
        }

        .side-stat-item .stat-num.orange {
            color: var(--accent-orange);
        }

        .side-stat-item .stat-num.red {
            color: var(--accent-red);
        }

        .side-stat-item .stat-label {
            font-size: 12px;
            color: var(--text-secondary);
        }

        .side-tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .side-tag {
            padding: 5px 12px;
            font-size: 12px;
            color: var(--text-secondary);
            background: var(--bg-panel-alt);
            border-radius: 20px;
            border: 1px solid var(--border-color);
            transition: color 0.2s ease, border-color 0.2s ease;
            cursor: default;
        }

        .side-tag:hover {
            color: var(--accent-green);
            border-color: var(--accent-green);
        }

        .side-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .side-list li {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            padding-left: 16px;
            position: relative;
        }

        .side-list li::before {
            content: '';
            position: absolute;
            left: 0;
            top: 10px;
            width: 6px;
            height: 6px;
            background: var(--accent-green);
            border-radius: 50%;
        }

        /* Support panel A - topic cards */
        .topic-cards {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .topic-card {
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: var(--spacing-card);
            transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
        }

        .topic-card:hover {
            border-color: var(--accent-green);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .topic-card .topic-icon {
            font-size: 28px;
            margin-bottom: 12px;
            display: block;
        }

        .topic-card h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .topic-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* Support panel B - step info */
        .step-panel {
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px;
        }

        .step-panel h2 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .step-panel .step-sub {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 20px;
        }

        .step-list {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            counter-reset: step-counter;
        }

        .step-list li {
            background: var(--bg-panel-alt);
            border-radius: var(--radius-sm);
            padding: 18px 16px;
            position: relative;
            counter-increment: step-counter;
            border: 1px solid var(--border-color);
        }

        .step-list li::before {
            content: counter(step-counter, decimal-leading-zero);
            font-family: var(--font-num);
            font-size: 24px;
            font-weight: 700;
            color: var(--accent-green);
            display: block;
            margin-bottom: 8px;
        }

        .step-list li .step-name {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
        }

        .step-list li .step-desc {
            font-size: 12px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: border-color 0.25s ease;
        }

        .faq-item.open {
            border-color: var(--accent-green);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 16px 20px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            text-align: left;
            transition: color 0.2s ease;
        }

        .faq-question:hover {
            color: var(--accent-green);
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            font-size: 18px;
            color: var(--accent-green);
            transition: transform 0.3s ease;
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            display: none;
            padding: 0 20px 16px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        .faq-item.open .faq-answer {
            display: block;
        }

        /* Related articles */
        .related-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .related-list li a {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 14px 18px;
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-primary);
            transition: border-color 0.2s ease, color 0.2s ease;
        }

        .related-list li a:hover {
            border-color: var(--accent-green);
            color: var(--accent-green);
        }

        .related-list li a .rel-arrow {
            flex-shrink: 0;
            color: var(--text-muted);
            font-size: 14px;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-footer);
            padding: 48px 0 24px;
            border-top: 1px solid var(--border-color);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 18px;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .footer-logo .logo-icon {
            width: 28px;
            height: 28px;
            background: var(--accent-green);
            border-radius: 5px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--bg-primary);
            font-size: 13px;
            font-weight: 800;
        }

        .footer-col p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col ul li a {
            font-size: 13px;
            color: var(--text-secondary);
            transition: color 0.2s ease;
        }

        .footer-col ul li a:hover {
            color: var(--accent-green);
        }

        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 20px;
            font-size: 12px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .footer-bottom a {
            color: var(--text-secondary);
        }

        .footer-bottom a:hover {
            color: var(--accent-green);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .category-body .container {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
                flex-direction: row;
                flex-wrap: wrap;
            }
            .side-panel {
                flex: 1;
                min-width: 240px;
            }
            .topic-cards {
                grid-template-columns: repeat(2, 1fr);
            }
            .step-list {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .nav-middle {
                gap: 0;
            }
            .nav-middle a {
                padding: 8px 10px;
                font-size: 13px;
            }
            .nav-status {
                display: none;
            }
        }

        @media (max-width: 768px) {
            :root {
                --spacing-section: 28px;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-middle {
                position: fixed;
                top: 58px;
                left: 0;
                right: 0;
                background: var(--bg-primary);
                border-bottom: 1px solid var(--border-color);
                flex-direction: column;
                align-items: stretch;
                padding: 12px 16px;
                gap: 6px;
                display: none;
                z-index: 999;
            }
            .nav-middle.open {
                display: flex;
            }
            .nav-middle a {
                padding: 10px 14px;
                border-bottom: none;
                border-left: 2px solid transparent;
            }
            .nav-middle a.active {
                border-left-color: var(--accent-green);
                border-bottom: none;
            }
            .nav-bell {
                display: none;
            }
            .page-head .container {
                flex-direction: column;
            }
            .page-head-tags {
                width: 100%;
            }
            .score-card {
                flex-direction: column;
            }
            .score-card-img {
                width: 100%;
                height: 160px;
            }
            .topic-cards {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-col p {
                max-width: 100%;
            }
            .side-stat-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 520px) {
            :root {
                --spacing-section: 20px;
            }
            .container {
                padding: 0 12px;
            }
            .page-head h1 {
                font-size: 22px;
            }
            .section-header h2 {
                font-size: 18px;
            }
            .nav-cta {
                padding: 7px 12px;
                font-size: 12px;
            }
            .nav-logo {
                font-size: 15px;
            }
            .nav-logo .logo-icon {
                width: 28px;
                height: 28px;
                font-size: 13px;
            }
            .side-panel {
                min-width: 100%;
            }
            .step-panel {
                padding: 18px;
            }
            .step-list li {
                padding: 14px 12px;
            }
            .score-card-meta {
                flex-wrap: wrap;
            }
            .related-list li a {
                font-size: 12px;
                padding: 12px 14px;
            }
        }

/* roulang page: category3 */
:root {
            --bg-primary: #0F1419;
            --bg-panel: #1A2029;
            --bg-panel-alt: #1E2630;
            --bg-footer: #0A0E12;
            --text-primary: #F5F7FA;
            --text-secondary: #9CA3AF;
            --text-muted: #6B7280;
            --accent-green: #00E676;
            --accent-green-dim: rgba(0, 230, 118, 0.12);
            --accent-orange: #FF6B35;
            --accent-orange-hover: #FF8250;
            --accent-red: #EF4444;
            --border-color: #2A323C;
            --border-hover: #3D4A57;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 14px 36px rgba(0, 0, 0, 0.5);
            --spacing-section: 56px;
            --spacing-card: 20px;
            --font-family: 'PingFang SC', 'HarmonyOS Sans SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            --font-num: 'SF Mono', 'Roboto Mono', 'Consolas', 'Courier New', monospace;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font-family);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: var(--accent-green);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            color: inherit;
            border: none;
            outline: none;
            background: none;
        }
        button {
            cursor: pointer;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        section {
            padding: var(--spacing-section) 0;
            position: relative;
        }
        section + section {
            border-top: 1px solid var(--border-color);
        }
        .section-header {
            margin-bottom: 32px;
        }
        .section-header h2 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 10px;
            letter-spacing: 0.02em;
            color: var(--text-primary);
        }
        .section-header p {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 720px;
            line-height: 1.7;
        }
        /* Header / Navigation */
        header.site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(15, 20, 25, 0.82);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-color);
            padding: 10px 0;
            transition: background 0.3s ease, box-shadow 0.3s ease;
        }
        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: nowrap;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            font-weight: 700;
            font-size: 18px;
            letter-spacing: 0.03em;
            color: var(--text-primary);
            white-space: nowrap;
        }
        .nav-logo .logo-icon {
            width: 32px;
            height: 32px;
            background: var(--accent-green);
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--bg-primary);
            font-size: 15px;
            font-weight: 800;
            flex-shrink: 0;
        }
        .nav-logo:hover {
            color: var(--accent-green);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: var(--radius-sm);
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            transition: border-color 0.2s ease;
            flex-shrink: 0;
        }
        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: transform 0.3s ease, opacity 0.3s ease;
        }
        .nav-toggle:hover {
            border-color: var(--accent-green);
        }
        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        .nav-middle {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            flex-shrink: 1;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }
        .nav-middle::-webkit-scrollbar {
            display: none;
        }
        .nav-middle li {
            white-space: nowrap;
        }
        .nav-middle a {
            display: flex;
            align-items: center;
            gap: 7px;
            padding: 8px 14px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            border-bottom: 2px solid transparent;
            transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
        }
        .nav-middle a .nav-icon {
            font-size: 14px;
            width: 18px;
            text-align: center;
            flex-shrink: 0;
        }
        .nav-middle a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.05);
        }
        .nav-middle a.active {
            color: var(--accent-green);
            border-bottom-color: var(--accent-green);
            background: transparent;
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .nav-status {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            color: var(--text-secondary);
            white-space: nowrap;
        }
        .status-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent-green);
            animation: pulse-dot 2s ease-in-out infinite;
            flex-shrink: 0;
        }
        @keyframes pulse-dot {
            0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(0, 230, 118, 0.5); }
            50% { opacity: 0.6; box-shadow: 0 0 0 6px rgba(0, 230, 118, 0); }
        }
        .nav-bell {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: var(--radius-sm);
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            position: relative;
            font-size: 16px;
            transition: border-color 0.2s ease;
            flex-shrink: 0;
        }
        .nav-bell:hover {
            border-color: var(--accent-green);
            color: var(--accent-green);
        }
        .badge-num {
            position: absolute;
            top: -5px;
            right: -5px;
            width: 18px;
            height: 18px;
            background: var(--accent-orange);
            color: #fff;
            border-radius: 50%;
            font-size: 10px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-num);
        }
        .nav-cta {
            background: var(--accent-orange);
            color: #fff;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 13px;
            font-weight: 600;
            white-space: nowrap;
            transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
            flex-shrink: 0;
        }
        .nav-cta:hover {
            background: var(--accent-orange-hover);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 4px 14px rgba(255, 107, 53, 0.35);
        }
        /* Page Header */
        .page-header {
            padding: 36px 0 28px;
            border-bottom: 1px solid var(--border-color);
            background: linear-gradient(180deg, var(--bg-panel) 0%, var(--bg-primary) 100%);
        }
        .page-header-inner {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
        }
        .page-header-content {
            max-width: 680px;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 12px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-secondary);
            transition: color 0.2s ease;
        }
        .breadcrumb a:hover {
            color: var(--accent-green);
        }
        .breadcrumb .separator {
            color: var(--text-muted);
            font-size: 12px;
        }
        .breadcrumb .current {
            color: var(--accent-green);
            font-weight: 500;
        }
        .page-header h1 {
            font-size: 30px;
            font-weight: 700;
            margin-bottom: 10px;
            letter-spacing: 0.01em;
            color: var(--text-primary);
            line-height: 1.35;
        }
        .page-header .page-desc {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
        }
        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 600;
            border: 1px solid transparent;
            transition: all 0.25s ease;
            white-space: nowrap;
            cursor: pointer;
        }
        .btn:focus-visible {
            outline: 2px solid var(--accent-green);
            outline-offset: 2px;
        }
        .btn-primary {
            background: var(--accent-orange);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--accent-orange-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(255, 107, 53, 0.35);
        }
        .btn-outline {
            background: transparent;
            border-color: var(--border-hover);
            color: var(--text-primary);
        }
        .btn-outline:hover {
            border-color: var(--accent-green);
            color: var(--accent-green);
            background: var(--accent-green-dim);
        }
        /* Article List + Sidebar Layout */
        .content-layout {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 32px;
            align-items: start;
        }
        @media (max-width: 768px) {
            .content-layout {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }
        /* Article Cards */
        .article-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .article-card {
            display: grid;
            grid-template-columns: 180px 1fr;
            gap: 16px;
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: var(--spacing-card);
            box-shadow: var(--shadow-card);
            transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
        }
        .article-card:hover {
            border-color: var(--accent-green);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .article-card .card-cover {
            width: 180px;
            height: 110px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
        }
        .article-card .card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius-sm);
            transition: transform 0.35s ease;
        }
        .article-card:hover .card-cover img {
            transform: scale(1.04);
        }
        .article-card-body {
            display: flex;
            flex-direction: column;
            gap: 6px;
            min-width: 0;
        }
        .article-card-body h3 {
            font-size: 16px;
            font-weight: 600;
            line-height: 1.5;
            color: var(--text-primary);
            margin: 0;
        }
        .article-card-body h3 a {
            color: var(--text-primary);
            transition: color 0.2s ease;
        }
        .article-card-body h3 a:hover {
            color: var(--accent-green);
        }
        .article-card-body .card-summary {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.65;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-card-body .card-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 12px;
            color: var(--text-muted);
            margin-top: auto;
        }
        .card-tag {
            background: var(--accent-green-dim);
            color: var(--accent-green);
            padding: 2px 10px;
            border-radius: 999px;
            font-size: 11px;
            font-weight: 500;
            white-space: nowrap;
        }
        .card-date {
            font-family: var(--font-num);
            white-space: nowrap;
        }
        /* Sidebar */
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }
        .sidebar-widget {
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 20px;
            box-shadow: var(--shadow-card);
        }
        .sidebar-widget h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border-color);
        }
        .stat-grid {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .stat-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 8px 0;
            border-bottom: 1px solid rgba(42, 50, 60, 0.5);
        }
        .stat-item:last-child {
            border-bottom: none;
        }
        .stat-label {
            font-size: 13px;
            color: var(--text-secondary);
        }
        .stat-value {
            font-family: var(--font-num);
            font-size: 16px;
            font-weight: 700;
            color: var(--accent-green);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }
        .stat-value.orange {
            color: var(--accent-orange);
        }
        .stat-value.red {
            color: var(--accent-red);
        }
        .stat-value.neutral {
            color: var(--text-primary);
        }
        .score-bar {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
            margin-top: 12px;
        }
        .score-badge {
            background: var(--bg-panel-alt);
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            padding: 4px 12px;
            border-radius: var(--radius-sm);
            font-size: 13px;
            font-family: var(--font-num);
            font-weight: 600;
            transition: border-color 0.2s ease, color 0.2s ease;
        }
        .score-badge:hover {
            border-color: var(--accent-green);
            color: var(--accent-green);
        }
        .score-badge.hot {
            border-color: var(--accent-green);
            color: var(--accent-green);
            background: var(--accent-green-dim);
        }
        /* Topic Cards */
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        @media (max-width: 768px) {
            .topic-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }
        .topic-card {
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
        }
        .topic-card:hover {
            border-color: var(--accent-green);
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .topic-card .topic-cover {
            width: 100%;
            height: 150px;
            overflow: hidden;
        }
        .topic-card .topic-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform 0.35s ease;
        }
        .topic-card:hover .topic-cover img {
            transform: scale(1.05);
        }
        .topic-card .topic-body {
            padding: 16px 18px;
        }
        .topic-card h3 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
            line-height: 1.45;
        }
        .topic-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.65;
        }
        /* Steps */
        .steps-panel {
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            box-shadow: var(--shadow-card);
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            margin-top: 16px;
        }
        @media (max-width: 768px) {
            .steps-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
        }
        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
            }
        }
        .step-item {
            display: flex;
            flex-direction: column;
            gap: 8px;
            padding: 14px;
            background: var(--bg-primary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            transition: border-color 0.2s ease;
        }
        .step-item:hover {
            border-color: var(--accent-green);
        }
        .step-num {
            font-family: var(--font-num);
            font-size: 22px;
            font-weight: 700;
            color: var(--accent-green);
            line-height: 1.2;
        }
        .step-item h4 {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-primary);
        }
        .step-item p {
            font-size: 12px;
            color: var(--text-secondary);
            line-height: 1.55;
        }
        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color 0.25s ease;
        }
        .faq-item.open {
            border-color: var(--accent-green);
        }
        .faq-item .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 16px 18px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            user-select: none;
            transition: background 0.2s ease;
        }
        .faq-item .faq-question:hover {
            background: rgba(255, 255, 255, 0.03);
        }
        .faq-item .faq-question h3 {
            font-size: 15px;
            font-weight: 600;
            margin: 0;
            color: var(--text-primary);
        }
        .faq-toggle {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--bg-panel-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            font-size: 14px;
            flex-shrink: 0;
            transition: transform 0.25s ease, background 0.2s ease, color 0.2s ease;
        }
        .faq-item.open .faq-toggle {
            transform: rotate(45deg);
            background: var(--accent-green);
            color: var(--bg-primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 18px;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 18px 16px;
        }
        .faq-answer p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        /* Related List */
        .related-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .related-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 14px;
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            transition: border-color 0.2s ease, background 0.2s ease;
        }
        .related-item:hover {
            border-color: var(--accent-green);
            background: rgba(0, 230, 118, 0.03);
        }
        .related-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent-green);
            flex-shrink: 0;
        }
        .related-item a {
            font-size: 13px;
            color: var(--text-secondary);
            font-weight: 500;
            transition: color 0.2s ease;
        }
        .related-item a:hover {
            color: var(--accent-green);
        }
        .related-item .related-date {
            font-size: 11px;
            color: var(--text-muted);
            font-family: var(--font-num);
            margin-left: auto;
            white-space: nowrap;
            flex-shrink: 0;
        }
        /* Tag Cloud */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .tag-cloud a {
            display: inline-flex;
            align-items: center;
            padding: 5px 14px;
            background: var(--bg-panel-alt);
            border: 1px solid var(--border-color);
            border-radius: 999px;
            font-size: 12px;
            color: var(--text-secondary);
            transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
        }
        .tag-cloud a:hover {
            border-color: var(--accent-green);
            color: var(--accent-green);
            background: var(--accent-green-dim);
        }
        /* Footer */
        .site-footer {
            background: var(--bg-footer);
            padding: 40px 0 20px;
            border-top: 1px solid var(--border-color);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }
        .footer-col {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 16px;
            color: var(--text-primary);
        }
        .footer-logo .logo-icon {
            width: 28px;
            height: 28px;
            background: var(--accent-green);
            border-radius: 5px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--bg-primary);
            font-size: 13px;
            font-weight: 700;
        }
        .footer-col p {
            font-size: 12px;
            color: var(--text-muted);
            line-height: 1.7;
        }
        .footer-col h4 {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .footer-col ul a {
            font-size: 12px;
            color: var(--text-secondary);
            transition: color 0.2s ease;
        }
        .footer-col ul a:hover {
            color: var(--accent-green);
        }
        .footer-bottom {
            margin-top: 32px;
            padding-top: 16px;
            border-top: 1px solid var(--border-color);
            font-size: 11px;
            color: var(--text-muted);
            text-align: center;
            line-height: 1.6;
        }
        .footer-bottom a {
            color: var(--text-secondary);
            transition: color 0.2s ease;
        }
        .footer-bottom a:hover {
            color: var(--accent-green);
        }
        /* Responsive Nav */
        @media (max-width: 1024px) {
            .nav-middle a {
                padding: 7px 10px;
                font-size: 13px;
            }
            .nav-status span:not(.status-dot) {
                display: none;
            }
            .nav-cta {
                padding: 7px 14px;
                font-size: 12px;
            }
        }
        @media (max-width: 768px) {
            section {
                padding: 28px 0;
            }
            .container {
                padding: 0 16px;
            }
            .section-header h2 {
                font-size: 19px;
            }
            .section-header p {
                font-size: 14px;
            }
            .page-header {
                padding: 24px 0 20px;
            }
            .page-header h1 {
                font-size: 24px;
            }
            .page-header .page-desc {
                font-size: 14px;
            }
            .page-header-inner {
                flex-direction: column;
                gap: 12px;
            }
            .breadcrumb {
                margin-bottom: 8px;
            }
            .article-card {
                grid-template-columns: 120px 1fr;
                padding: 14px;
                gap: 12px;
            }
            .article-card .card-cover {
                width: 120px;
                height: 80px;
            }
            .article-card-body h3 {
                font-size: 14px;
            }
            .article-card-body .card-summary {
                font-size: 12px;
                -webkit-line-clamp: 2;
            }
            .topic-grid {
                grid-template-columns: 1fr;
            }
            .steps-panel {
                padding: 20px 16px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 12px;
            }
            section {
                padding: 24px 0;
            }
            .article-card {
                grid-template-columns: 1fr;
            }
            .article-card .card-cover {
                width: 100%;
                height: 140px;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-middle {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--bg-primary);
                border-bottom: 1px solid var(--border-color);
                flex-direction: column;
                align-items: stretch;
                padding: 12px 16px;
                gap: 4px;
                overflow-y: auto;
                max-height: 60vh;
            }
            .nav-middle.open {
                display: flex;
            }
            .nav-middle a {
                padding: 10px 14px;
                border-radius: var(--radius-sm);
                border-bottom: none;
                font-size: 14px;
            }
            .nav-middle a.active {
                background: var(--accent-green-dim);
                border-bottom: none;
            }
            .nav-right {
                gap: 6px;
            }
            .nav-status {
                font-size: 11px;
            }
            .nav-bell {
                width: 32px;
                height: 32px;
                font-size: 14px;
            }
            .badge-num {
                width: 16px;
                height: 16px;
                font-size: 9px;
                top: -4px;
                right: -4px;
            }
            .nav-cta {
                padding: 6px 12px;
                font-size: 12px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                font-size: 10px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .stat-value {
                font-size: 14px;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #0F1419;
            --bg-panel: #1A2029;
            --bg-panel-alt: #1E2630;
            --bg-footer: #0A0E12;
            --text-primary: #F5F7FA;
            --text-secondary: #9CA3AF;
            --text-muted: #6B7280;
            --accent-green: #00E676;
            --accent-green-dim: rgba(0, 230, 118, 0.12);
            --accent-orange: #FF6B35;
            --accent-orange-hover: #FF8250;
            --accent-red: #EF4444;
            --border-color: #2A323C;
            --border-hover: #3D4A57;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 14px 36px rgba(0, 0, 0, 0.5);
            --spacing-section: 56px;
            --spacing-card: 20px;
            --font-family: 'PingFang SC', 'HarmonyOS Sans SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            --font-num: 'SF Mono', 'Roboto Mono', 'Consolas', 'Courier New', monospace;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            color: inherit;
            border: none;
            outline: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        section {
            padding: var(--spacing-section) 0;
            position: relative;
        }

        section + section {
            border-top: 1px solid var(--border-color);
        }

        .section-header {
            margin-bottom: 32px;
        }

        .section-header h2 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 10px;
            letter-spacing: 0.02em;
            color: var(--text-primary);
        }

        .section-header p {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 720px;
            line-height: 1.7;
        }

        /* Header / Navigation */
        header.site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(15, 20, 25, 0.82);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-color);
            padding: 10px 0;
            transition: background 0.3s ease, box-shadow 0.3s ease;
        }

        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: nowrap;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            font-weight: 700;
            font-size: 18px;
            letter-spacing: 0.03em;
            color: var(--text-primary);
            white-space: nowrap;
        }

        .nav-logo .logo-icon {
            width: 32px;
            height: 32px;
            background: var(--accent-green);
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--bg-primary);
            font-size: 15px;
            font-weight: 800;
            flex-shrink: 0;
        }

        .nav-logo:hover {
            color: var(--accent-green);
        }

        .nav-middle {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            flex-shrink: 1;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .nav-middle::-webkit-scrollbar {
            display: none;
        }

        .nav-middle li {
            white-space: nowrap;
        }

        .nav-middle a {
            display: flex;
            align-items: center;
            gap: 7px;
            padding: 8px 14px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            border-bottom: 2px solid transparent;
            transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
        }

        .nav-middle a .nav-icon {
            font-size: 14px;
            width: 18px;
            text-align: center;
            flex-shrink: 0;
        }

        .nav-middle a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-middle a.active {
            color: var(--accent-green);
            border-bottom-color: var(--accent-green);
            background: transparent;
        }

        .nav-right {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }

        .nav-status {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            color: var(--text-secondary);
            white-space: nowrap;
        }

        .status-dot {
            width: 8px;
            height: 8px;
            background: var(--accent-green);
            border-radius: 50%;
            animation: pulse-dot 1.8s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(0, 230, 118, 0.4); }
            50% { opacity: 0.7; box-shadow: 0 0 0 6px rgba(0, 230, 118, 0); }
        }

        .nav-bell {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            font-size: 16px;
            color: var(--text-secondary);
            transition: background 0.2s ease, color 0.2s ease;
        }

        .nav-bell:hover {
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-primary);
        }

        .badge-num {
            position: absolute;
            top: -2px;
            right: -2px;
            background: var(--accent-orange);
            color: #fff;
            font-size: 10px;
            font-weight: 700;
            min-width: 18px;
            height: 18px;
            border-radius: 9px;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 0 4px;
            line-height: 1;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 9px 18px;
            background: var(--accent-orange);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            white-space: nowrap;
            transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
        }

        .nav-cta:hover {
            background: var(--accent-orange-hover);
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(255, 107, 53, 0.3);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background 0.2s ease;
        }

        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: transform 0.3s ease, opacity 0.3s ease;
        }

        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.06);
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 12px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-secondary);
            transition: color 0.2s ease;
        }

        .breadcrumb a:hover {
            color: var(--accent-green);
        }

        .breadcrumb .sep {
            color: var(--text-muted);
            font-size: 11px;
        }

        .breadcrumb .current {
            color: var(--accent-green);
            font-weight: 500;
        }

        /* Category H1 Block */
        .category-hero {
            padding: 40px 0 32px;
            background: linear-gradient(180deg, rgba(0, 230, 118, 0.04) 0%, transparent 100%);
            border-bottom: 1px solid var(--border-color);
            margin-bottom: 0;
        }

        .category-hero .container {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
        }

        .category-hero-left {
            flex: 1;
            min-width: 280px;
        }

        .category-hero-left h1 {
            font-size: 30px;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: 0.02em;
            color: var(--text-primary);
        }

        .category-hero-left p {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 640px;
            line-height: 1.8;
        }

        .category-hero-right {
            flex-shrink: 0;
            display: flex;
            align-items: center;
        }

        /* Content area grid */
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 32px;
            align-items: start;
        }

        /* Cards list */
        .card-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .article-card {
            display: grid;
            grid-template-columns: 200px 1fr;
            gap: 20px;
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 18px;
            transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
        }

        .article-card:hover {
            border-color: var(--accent-green);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .article-card img {
            width: 200px;
            height: 140px;
            object-fit: cover;
            border-radius: var(--radius-sm);
        }

        .article-card-info {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .article-card-info h3 {
            font-size: 16px;
            font-weight: 600;
            line-height: 1.5;
            color: var(--text-primary);
            transition: color 0.2s ease;
        }

        .article-card:hover .article-card-info h3 {
            color: var(--accent-green);
        }

        .article-card-info p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
        }

        .article-card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 12px;
            color: var(--text-muted);
        }

        .article-card-meta .tag {
            display: inline-block;
            padding: 3px 10px;
            background: var(--accent-green-dim);
            color: var(--accent-green);
            border-radius: 20px;
            font-size: 11px;
            font-weight: 500;
        }

        /* Sidebar */
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .sidebar-block {
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 20px;
        }

        .sidebar-block h3 {
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 16px;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border-color);
        }

        .stat-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }

        .stat-item {
            background: var(--bg-panel-alt);
            border-radius: var(--radius-sm);
            padding: 14px 12px;
            text-align: center;
        }

        .stat-item .stat-num {
            font-family: var(--font-num);
            font-size: 24px;
            font-weight: 700;
            color: var(--accent-green);
            line-height: 1.3;
        }

        .stat-item .stat-num.orange {
            color: var(--accent-orange);
        }

        .stat-item .stat-num.red {
            color: var(--accent-red);
        }

        .stat-item .stat-label {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 4px;
        }

        .top-score-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .top-score-list li {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-secondary);
            padding: 8px 12px;
            background: var(--bg-panel-alt);
            border-radius: var(--radius-sm);
        }

        .top-score-list li .score-val {
            font-family: var(--font-num);
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
        }

        .top-score-list li .score-rank {
            color: var(--accent-orange);
            font-weight: 600;
            font-size: 12px;
        }

        /* Support panel A: topic cards */
        .topic-card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .topic-card {
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
        }

        .topic-card:hover {
            border-color: var(--accent-green);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .topic-card img {
            width: 100%;
            height: 160px;
            object-fit: cover;
            border-radius: 0;
        }

        .topic-card-body {
            padding: 16px 18px 18px;
        }

        .topic-card-body h3 {
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .topic-card-body p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* Support panel B: steps panel */
        .steps-panel {
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
        }

        .steps-panel-title {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 20px;
            color: var(--text-primary);
        }

        .steps-list {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            list-style: none;
        }

        .steps-list li {
            display: flex;
            flex-direction: column;
            gap: 8px;
            padding: 16px;
            background: var(--bg-panel-alt);
            border-radius: var(--radius-sm);
            border: 1px solid transparent;
            transition: border-color 0.3s ease;
        }

        .steps-list li:hover {
            border-color: var(--accent-green);
        }

        .steps-list .step-num {
            font-family: var(--font-num);
            font-size: 20px;
            font-weight: 700;
            color: var(--accent-green);
        }

        .steps-list .step-title {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
        }

        .steps-list .step-desc {
            font-size: 12px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 820px;
        }

        .faq-item {
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color 0.3s ease;
        }

        .faq-item.open {
            border-color: var(--accent-green);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 16px 20px;
            width: 100%;
            text-align: left;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            transition: background 0.2s ease;
        }

        .faq-question:hover {
            background: rgba(255, 255, 255, 0.04);
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--accent-green);
            transition: transform 0.3s ease;
        }

        .faq-item.open .faq-question .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
        }

        .faq-answer p {
            padding: 0 20px 18px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* Related articles list */
        .related-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 820px;
        }

        .related-list li {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 14px 18px;
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            transition: border-color 0.2s ease, background 0.2s ease;
        }

        .related-list li:hover {
            border-color: var(--accent-green);
            background: var(--bg-panel-alt);
        }

        .related-list .rel-title {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-primary);
            flex: 1;
        }

        .related-list .rel-date {
            font-size: 12px;
            color: var(--text-muted);
            white-space: nowrap;
        }

        /* Tags */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            max-width: 820px;
        }

        .tag-cloud a {
            display: inline-block;
            padding: 7px 16px;
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: 20px;
            font-size: 13px;
            color: var(--text-secondary);
            transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
        }

        .tag-cloud a:hover {
            border-color: var(--accent-green);
            color: var(--accent-green);
            background: var(--accent-green-dim);
        }

        /* Footer */
        footer.site-footer {
            background: var(--bg-footer);
            padding: 48px 0 24px;
            border-top: 1px solid var(--border-color);
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }

        .footer-col {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 17px;
            color: var(--text-primary);
            letter-spacing: 0.03em;
            margin-bottom: 6px;
        }

        .footer-logo .logo-icon {
            width: 30px;
            height: 30px;
            background: var(--accent-green);
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--bg-primary);
            font-size: 14px;
            font-weight: 800;
        }

        .footer-col p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 300px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
            letter-spacing: 0.03em;
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col ul a {
            font-size: 13px;
            color: var(--text-secondary);
            transition: color 0.2s ease;
        }

        .footer-col ul a:hover {
            color: var(--accent-green);
        }

        .footer-bottom {
            padding-top: 20px;
            border-top: 1px solid var(--border-color);
            font-size: 12px;
            color: var(--text-muted);
            text-align: center;
            line-height: 1.7;
        }

        .footer-bottom a {
            color: var(--text-secondary);
            transition: color 0.2s ease;
        }

        .footer-bottom a:hover {
            color: var(--accent-green);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .content-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .sidebar {
                order: 2;
            }
            .card-list {
                order: 1;
            }
            .topic-card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-list {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            :root {
                --spacing-section: 36px;
            }
            .container {
                padding: 0 16px;
            }
            .nav-wrap {
                flex-wrap: wrap;
            }
            .nav-toggle {
                display: flex;
                order: 1;
            }
            .nav-middle {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: rgba(15, 20, 25, 0.96);
                border-bottom: 1px solid var(--border-color);
                padding: 12px 16px;
                gap: 6px;
                list-style: none;
                z-index: 99;
            }
            .nav-middle.open {
                display: flex;
            }
            .nav-middle a {
                padding: 12px 14px;
                border-bottom: none;
                border-left: 2px solid transparent;
                width: 100%;
            }
            .nav-middle a.active {
                border-left-color: var(--accent-green);
                border-bottom: none;
            }
            .nav-right {
                order: 2;
                gap: 8px;
            }
            .nav-status {
                display: none;
            }
            .nav-cta {
                padding: 8px 14px;
                font-size: 12px;
            }
            .category-hero .container {
                flex-direction: column;
                gap: 16px;
            }
            .category-hero-left h1 {
                font-size: 24px;
            }
            .article-card {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .article-card img {
                width: 100%;
                height: 180px;
            }
            .topic-card-grid {
                grid-template-columns: 1fr;
            }
            .steps-list {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .section-header h2 {
                font-size: 19px;
            }
        }

        @media (max-width: 520px) {
            :root {
                --spacing-section: 28px;
            }
            .container {
                padding: 0 12px;
            }
            .nav-bell {
                width: 32px;
                height: 32px;
                font-size: 14px;
            }
            .nav-cta {
                padding: 7px 10px;
                font-size: 11px;
            }
            .category-hero-left h1 {
                font-size: 21px;
            }
            .category-hero-left p {
                font-size: 14px;
            }
            .article-card {
                padding: 14px;
            }
            .article-card img {
                height: 160px;
            }
            .stat-grid {
                grid-template-columns: 1fr 1fr;
            }
            .topic-card img {
                height: 140px;
            }
            .steps-panel {
                padding: 18px 16px;
            }
            .related-list li {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }
            .footer-bottom {
                font-size: 11px;
            }
        }

/* roulang page: category4 */
:root {
            --bg-primary: #0F1419;
            --bg-panel: #1A2029;
            --bg-panel-alt: #1E2630;
            --bg-footer: #0A0E12;
            --text-primary: #F5F7FA;
            --text-secondary: #9CA3AF;
            --text-muted: #6B7280;
            --accent-green: #00E676;
            --accent-green-dim: rgba(0, 230, 118, 0.12);
            --accent-orange: #FF6B35;
            --accent-orange-hover: #FF8250;
            --accent-red: #EF4444;
            --border-color: #2A323C;
            --border-hover: #3D4A57;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 14px 36px rgba(0, 0, 0, 0.5);
            --spacing-section: 56px;
            --spacing-card: 20px;
            --font-family: 'PingFang SC', 'HarmonyOS Sans SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            --font-num: 'SF Mono', 'Roboto Mono', 'Consolas', 'Courier New', monospace;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
            min-height: 100vh;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease, border-color 0.2s ease;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            color: inherit;
            border: none;
            outline: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        section {
            padding: var(--spacing-section) 0;
            position: relative;
        }

        section+section {
            border-top: 1px solid var(--border-color);
        }

        .section-header {
            margin-bottom: 32px;
        }

        .section-header h2 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 10px;
            letter-spacing: 0.02em;
            color: var(--text-primary);
        }

        .section-header p {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 720px;
            line-height: 1.7;
        }

        .section-header .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 500;
            color: var(--accent-green);
            background: var(--accent-green-dim);
            padding: 4px 10px;
            border-radius: 999px;
            margin-bottom: 12px;
            letter-spacing: 0.06em;
        }

        /* Header / Navigation */
        header.site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(15, 20, 25, 0.85);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-color);
            padding: 10px 0;
            transition: background 0.3s ease, box-shadow 0.3s ease;
        }

        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: nowrap;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            font-weight: 700;
            font-size: 18px;
            letter-spacing: 0.03em;
            color: var(--text-primary);
            white-space: nowrap;
        }

        .nav-logo .logo-icon {
            width: 32px;
            height: 32px;
            background: var(--accent-green);
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--bg-primary);
            font-size: 15px;
            font-weight: 800;
            flex-shrink: 0;
        }

        .nav-logo:hover {
            color: var(--accent-green);
        }

        .nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            background: var(--bg-panel);
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            cursor: pointer;
            flex-shrink: 0;
            transition: border-color 0.2s ease;
        }

        .nav-toggle:hover {
            border-color: var(--accent-green);
        }

        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: background 0.2s ease;
        }

        .nav-toggle:hover span {
            background: var(--accent-green);
        }

        .nav-middle {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            flex-shrink: 1;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .nav-middle::-webkit-scrollbar {
            display: none;
        }

        .nav-middle li {
            white-space: nowrap;
        }

        .nav-middle a {
            display: flex;
            align-items: center;
            gap: 7px;
            padding: 8px 14px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            border-bottom: 2px solid transparent;
            transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
        }

        .nav-middle a .nav-icon {
            font-size: 14px;
            width: 18px;
            text-align: center;
            flex-shrink: 0;
        }

        .nav-middle a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-middle a.active {
            color: var(--accent-green);
            border-bottom-color: var(--accent-green);
            background: transparent;
        }

        .nav-right {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .nav-status {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--text-secondary);
            white-space: nowrap;
        }

        .status-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent-green);
            animation: pulse-dot 2s ease-in-out infinite;
            flex-shrink: 0;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(0, 230, 118, 0.5);
            }
            50% {
                box-shadow: 0 0 0 5px rgba(0, 230, 118, 0);
            }
        }

        .nav-bell {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            font-size: 16px;
            transition: border-color 0.2s ease, background 0.2s ease;
            flex-shrink: 0;
        }

        .nav-bell:hover {
            border-color: var(--accent-green);
            background: var(--bg-panel-alt);
        }

        .badge-num {
            position: absolute;
            top: -4px;
            right: -4px;
            width: 18px;
            height: 18px;
            border-radius: 50%;
            background: var(--accent-red);
            color: #fff;
            font-size: 11px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .nav-cta {
            display: inline-block;
            padding: 9px 18px;
            background: var(--accent-orange);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            white-space: nowrap;
            transition: background 0.2s ease, transform 0.2s ease;
            flex-shrink: 0;
        }

        .nav-cta:hover {
            background: var(--accent-orange-hover);
            transform: translateY(-1px);
        }

        /* Mobile nav overlay */
        .nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 998;
        }

        .nav-overlay.show {
            display: block;
        }

        /* Breadcrumb */
        .breadcrumb-wrap {
            padding: 20px 0 0;
            font-size: 14px;
            color: var(--text-secondary);
        }

        .breadcrumb-wrap ol {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 6px;
        }

        .breadcrumb-wrap li {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .breadcrumb-wrap li:not(:last-child)::after {
            content: '/';
            color: var(--text-muted);
            font-size: 12px;
        }

        .breadcrumb-wrap a {
            color: var(--text-secondary);
            transition: color 0.2s ease;
        }

        .breadcrumb-wrap a:hover {
            color: var(--accent-green);
        }

        .breadcrumb-wrap li:last-child {
            color: var(--text-primary);
            font-weight: 500;
        }

        /* Page Hero / H1 section for category page */
        .page-hero {
            padding: 36px 0 28px;
            border-bottom: 1px solid var(--border-color);
        }

        .page-hero .page-hero-grid {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
        }

        .page-hero h1 {
            font-size: 30px;
            font-weight: 700;
            letter-spacing: 0.02em;
            color: var(--text-primary);
            margin-bottom: 10px;
            line-height: 1.35;
        }

        .page-hero .page-hero-desc {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 640px;
            line-height: 1.7;
        }

        .page-hero .page-hero-meta {
            display: flex;
            gap: 18px;
            flex-shrink: 0;
            align-items: center;
        }

        .page-hero .hero-stat {
            text-align: center;
            padding: 12px 16px;
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            min-width: 78px;
        }

        .page-hero .hero-stat .stat-val {
            font-family: var(--font-num);
            font-size: 20px;
            font-weight: 700;
            color: var(--accent-green);
            line-height: 1.2;
        }

        .page-hero .hero-stat .stat-label {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 3px;
        }

        /* Main layout: list + sidebar */
        .content-layout {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 28px;
            align-items: start;
        }

        /* Card list */
        .card-list {
            display: flex;
            flex-direction: column;
            gap: 18px;
        }

        .content-card {
            display: flex;
            gap: 16px;
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 16px;
            transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
        }

        .content-card:hover {
            border-color: var(--accent-green);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .content-card .card-cover {
            width: 150px;
            height: 105px;
            flex-shrink: 0;
            border-radius: var(--radius-sm);
            overflow: hidden;
            background: var(--bg-panel-alt);
        }

        .content-card .card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius-sm);
        }

        .content-card .card-body {
            flex: 1;
            min-width: 0;
        }

        .content-card .card-body h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 7px;
            line-height: 1.45;
            transition: color 0.2s ease;
        }

        .content-card:hover .card-body h3 {
            color: var(--accent-green);
        }

        .content-card .card-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.65;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .card-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
            font-size: 12px;
            color: var(--text-muted);
        }

        .card-meta .tag {
            display: inline-block;
            padding: 3px 9px;
            border-radius: 999px;
            font-size: 11px;
            font-weight: 500;
            background: var(--accent-green-dim);
            color: var(--accent-green);
            letter-spacing: 0.04em;
        }

        .card-meta .tag.orange-tag {
            background: rgba(255, 107, 53, 0.12);
            color: var(--accent-orange);
        }

        .card-meta .tag.red-tag {
            background: rgba(239, 68, 68, 0.12);
            color: var(--accent-red);
        }

        /* Sidebar */
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 22px;
        }

        .sidebar-panel {
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 20px;
        }

        .sidebar-panel h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 14px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border-color);
            letter-spacing: 0.02em;
        }

        .stat-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }

        .stat-item {
            background: var(--bg-panel-alt);
            border-radius: var(--radius-sm);
            padding: 14px 12px;
            text-align: center;
            border: 1px solid var(--border-color);
            transition: border-color 0.2s ease;
        }

        .stat-item:hover {
            border-color: var(--accent-green);
        }

        .stat-item .stat-num {
            font-family: var(--font-num);
            font-size: 22px;
            font-weight: 700;
            color: var(--accent-green);
            line-height: 1.2;
            letter-spacing: 0.02em;
        }

        .stat-item .stat-num.orange {
            color: var(--accent-orange);
        }

        .stat-item .stat-num.red {
            color: var(--accent-red);
        }

        .stat-item .stat-label {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 4px;
        }

        .sidebar-list li {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 9px 0;
            border-bottom: 1px solid var(--border-color);
            font-size: 14px;
            color: var(--text-secondary);
        }

        .sidebar-list li:last-child {
            border-bottom: none;
        }

        .sidebar-list li span:last-child {
            font-family: var(--font-num);
            font-weight: 600;
            color: var(--text-primary);
            font-size: 13px;
        }

        .sidebar-list li span:last-child.highlight {
            color: var(--accent-green);
        }

        /* Topic cards (support section A) */
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .topic-card {
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 22px;
            transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
        }

        .topic-card:hover {
            border-color: var(--accent-green);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .topic-card .topic-icon {
            width: 42px;
            height: 42px;
            border-radius: var(--radius-sm);
            background: var(--accent-green-dim);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--accent-green);
            margin-bottom: 14px;
        }

        .topic-card h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.45;
        }

        .topic-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        /* Info panel (support section B) */
        .info-panel {
            background: var(--bg-panel-alt);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 28px 32px;
            display: flex;
            gap: 24px;
            align-items: flex-start;
            flex-wrap: wrap;
        }

        .info-panel .info-step {
            flex: 1;
            min-width: 200px;
            display: flex;
            gap: 14px;
            align-items: flex-start;
        }

        .info-panel .step-num {
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: var(--accent-green);
            color: var(--bg-primary);
            font-weight: 700;
            font-size: 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .info-panel .info-step h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 5px;
        }

        .info-panel .info-step p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 860px;
        }

        .faq-item {
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color 0.25s ease;
        }

        .faq-item.open {
            border-color: var(--accent-green);
        }

        .faq-item .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            padding: 16px 20px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            text-align: left;
            cursor: pointer;
            transition: color 0.2s ease;
        }

        .faq-item .faq-question:hover {
            color: var(--accent-green);
        }

        .faq-item .faq-icon {
            font-size: 18px;
            color: var(--text-muted);
            transition: transform 0.3s ease, color 0.2s ease;
            flex-shrink: 0;
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            color: var(--accent-green);
        }

        .faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 20px;
        }

        .faq-item.open .faq-answer {
            max-height: 240px;
            padding: 0 20px 16px;
        }

        .faq-item .faq-answer p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        /* Related articles */
        .related-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .related-item {
            display: flex;
            align-items: center;
            gap: 14px;
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 14px 18px;
            transition: border-color 0.2s ease, background 0.2s ease;
        }

        .related-item:hover {
            border-color: var(--accent-green);
            background: var(--bg-panel-alt);
        }

        .related-item .related-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent-orange);
            flex-shrink: 0;
        }

        .related-item span {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color 0.2s ease;
        }

        .related-item:hover span {
            color: var(--text-primary);
        }

        /* CTA section */
        .cta-zone {
            background: linear-gradient(135deg, rgba(0, 230, 118, 0.06) 0%, rgba(255, 107, 53, 0.08) 100%);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            padding: 36px 32px;
            text-align: center;
        }

        .cta-zone h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            letter-spacing: 0.02em;
        }

        .cta-zone p {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 20px;
            line-height: 1.7;
        }

        .cta-actions {
            display: flex;
            gap: 12px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn-primary {
            display: inline-block;
            padding: 12px 28px;
            background: var(--accent-orange);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            transition: background 0.2s ease, transform 0.2s ease;
        }

        .btn-primary:hover {
            background: var(--accent-orange-hover);
            transform: translateY(-1px);
        }

        .btn-secondary {
            display: inline-block;
            padding: 12px 28px;
            background: transparent;
            color: var(--text-primary);
            font-size: 15px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
        }

        .btn-secondary:hover {
            border-color: var(--accent-green);
            color: var(--accent-green);
            background: var(--accent-green-dim);
        }

        /* Footer */
        .site-footer {
            background: var(--bg-footer);
            border-top: 1px solid var(--border-color);
            padding: 48px 0 0;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            padding-bottom: 36px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: 0.03em;
        }

        .footer-col ul li {
            margin-bottom: 9px;
        }

        .footer-col ul a {
            font-size: 14px;
            color: var(--text-muted);
            transition: color 0.2s ease;
        }

        .footer-col ul a:hover {
            color: var(--accent-green);
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 17px;
            color: var(--text-primary);
            margin-bottom: 14px;
        }

        .footer-logo .logo-icon {
            width: 30px;
            height: 30px;
            background: var(--accent-green);
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--bg-primary);
            font-size: 14px;
            font-weight: 800;
        }

        .footer-col p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding: 18px 0;
            text-align: center;
            font-size: 13px;
            color: var(--text-muted);
        }

        .footer-bottom a {
            color: var(--text-secondary);
            transition: color 0.2s ease;
        }

        .footer-bottom a:hover {
            color: var(--accent-green);
        }

        /* Responsive */
        @media screen and (max-width: 1024px) {
            .nav-middle a {
                padding: 8px 10px;
                font-size: 13px;
            }

            .content-layout {
                grid-template-columns: 1fr 320px;
                gap: 20px;
            }

            .topic-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media screen and (max-width: 768px) {
            :root {
                --spacing-section: 36px;
            }

            .container {
                padding: 0 16px;
            }

            .nav-toggle {
                display: flex;
            }

            .nav-middle {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--bg-footer);
                border-bottom: 1px solid var(--border-color);
                flex-direction: column;
                padding: 12px 16px;
                gap: 4px;
                box-shadow: var(--shadow-card);
            }

            .nav-middle.show {
                display: flex;
            }

            .nav-middle a {
                width: 100%;
                padding: 12px 14px;
                border-bottom: 1px solid transparent;
                border-radius: var(--radius-sm);
            }

            .nav-middle a.active {
                background: var(--accent-green-dim);
                border-bottom-color: transparent;
            }

            .nav-status {
                display: none;
            }

            .nav-cta {
                padding: 7px 13px;
                font-size: 13px;
            }

            .page-hero {
                padding: 24px 0 20px;
            }

            .page-hero h1 {
                font-size: 24px;
            }

            .page-hero .page-hero-grid {
                flex-direction: column;
                gap: 14px;
            }

            .page-hero .page-hero-meta {
                width: 100%;
                justify-content: flex-start;
            }

            .content-layout {
                grid-template-columns: 1fr;
            }

            .content-card {
                flex-direction: column;
            }

            .content-card .card-cover {
                width: 100%;
                height: 180px;
            }

            .topic-grid {
                grid-template-columns: 1fr;
            }

            .info-panel {
                flex-direction: column;
                padding: 22px 20px;
                gap: 18px;
            }

            .info-panel .info-step {
                min-width: auto;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .cta-zone {
                padding: 28px 20px;
            }

            .cta-zone h2 {
                font-size: 19px;
            }

            .section-header h2 {
                font-size: 19px;
            }
        }

        @media screen and (max-width: 520px) {
            :root {
                --spacing-section: 28px;
            }

            .container {
                padding: 0 12px;
            }

            .nav-logo {
                font-size: 16px;
                gap: 8px;
            }

            .nav-logo .logo-icon {
                width: 28px;
                height: 28px;
                font-size: 13px;
            }

            .nav-cta {
                font-size: 12px;
                padding: 7px 11px;
            }

            .nav-bell {
                width: 34px;
                height: 34px;
                font-size: 14px;
            }

            .page-hero h1 {
                font-size: 20px;
            }

            .page-hero .hero-stat {
                min-width: 65px;
                padding: 10px 12px;
            }

            .page-hero .hero-stat .stat-val {
                font-size: 17px;
            }

            .card-meta {
                font-size: 11px;
                gap: 6px;
            }

            .content-card .card-body h3 {
                font-size: 15px;
            }

            .content-card .card-body p {
                font-size: 13px;
            }

            .stat-grid {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }

            .stat-item .stat-num {
                font-size: 18px;
            }

            .btn-primary,
            .btn-secondary {
                padding: 10px 20px;
                font-size: 14px;
                width: 100%;
                text-align: center;
            }

            .cta-actions {
                flex-direction: column;
                width: 100%;
            }

            .faq-item .faq-question {
                font-size: 14px;
                padding: 13px 16px;
            }

            .faq-item .faq-answer {
                padding: 0 16px;
            }

            .faq-item.open .faq-answer {
                padding: 0 16px 13px;
            }

            .related-item {
                padding: 11px 14px;
                gap: 10px;
            }

            .related-item span {
                font-size: 13px;
            }
        }

/* roulang page: category5 */
:root {
            --bg-primary: #0F1419;
            --bg-panel: #1A2029;
            --bg-panel-alt: #1E2630;
            --bg-footer: #0A0E12;
            --text-primary: #F5F7FA;
            --text-secondary: #9CA3AF;
            --text-muted: #6B7280;
            --accent-green: #00E676;
            --accent-green-dim: rgba(0, 230, 118, 0.12);
            --accent-orange: #FF6B35;
            --accent-orange-hover: #FF8250;
            --accent-red: #EF4444;
            --border-color: #2A323C;
            --border-hover: #3D4A57;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 14px 36px rgba(0, 0, 0, 0.5);
            --spacing-section: 44px;
            --spacing-card: 20px;
            --font-family: 'PingFang SC', 'HarmonyOS Sans SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            --font-num: 'SF Mono', 'Roboto Mono', 'Consolas', 'Courier New', monospace;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-family);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
            margin: 0;
            padding: 0;
        }
        * {
            box-sizing: border-box;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            color: inherit;
            border: none;
            outline: none;
            background: none;
        }
        button {
            cursor: pointer;
        }
        ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        h1, h2, h3, h4, p {
            margin-top: 0;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        section {
            padding: var(--spacing-section) 0;
            position: relative;
        }
        section + section {
            border-top: 1px solid var(--border-color);
        }
        .section-header {
            margin-bottom: 28px;
        }
        .section-header h2 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 10px;
            letter-spacing: 0.02em;
            color: var(--text-primary);
            line-height: 1.4;
        }
        .section-header p {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 780px;
            line-height: 1.7;
        }

        /* Header */
        header.site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(15, 20, 25, 0.82);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-color);
            padding: 10px 0;
            transition: background 0.3s ease, box-shadow 0.3s ease;
        }
        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: nowrap;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            font-weight: 700;
            font-size: 18px;
            letter-spacing: 0.03em;
            color: var(--text-primary);
            white-space: nowrap;
        }
        .nav-logo .logo-icon {
            width: 32px;
            height: 32px;
            background: var(--accent-green);
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--bg-primary);
            font-size: 15px;
            font-weight: 800;
            flex-shrink: 0;
        }
        .nav-logo:hover {
            color: var(--accent-green);
        }
        .nav-middle {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            flex-shrink: 1;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }
        .nav-middle::-webkit-scrollbar {
            display: none;
        }
        .nav-middle li {
            white-space: nowrap;
        }
        .nav-middle a {
            display: flex;
            align-items: center;
            gap: 7px;
            padding: 8px 14px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            border-bottom: 2px solid transparent;
            transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
        }
        .nav-middle a .nav-icon {
            font-size: 14px;
            width: 18px;
            text-align: center;
            flex-shrink: 0;
        }
        .nav-middle a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.05);
        }
        .nav-middle a.active {
            color: var(--accent-green);
            border-bottom-color: var(--accent-green);
            background: transparent;
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }
        .nav-status {
            display: flex;
            align-items: center;
            gap: 7px;
            font-size: 13px;
            color: var(--text-secondary);
            white-space: nowrap;
        }
        .status-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent-green);
            box-shadow: 0 0 6px rgba(0, 230, 118, 0.6);
            animation: pulse-dot 2s ease-in-out infinite;
        }
        @keyframes pulse-dot {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.5; }
        }
        .nav-bell {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: var(--radius-sm);
            font-size: 18px;
            transition: background 0.2s ease;
        }
        .nav-bell:hover {
            background: rgba(255, 255, 255, 0.08);
        }
        .badge-num {
            position: absolute;
            top: -2px;
            right: -2px;
            background: var(--accent-orange);
            color: #fff;
            font-size: 10px;
            font-weight: 700;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-num);
            line-height: 1;
        }
        .nav-cta {
            background: var(--accent-orange);
            color: #fff;
            padding: 9px 18px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: background 0.25s ease, transform 0.2s ease, box-shadow 0.25s ease;
        }
        .nav-cta:hover {
            background: var(--accent-orange-hover);
            box-shadow: 0 6px 16px rgba(255, 107, 53, 0.3);
            transform: translateY(-1px);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            background: transparent;
            border: 1px solid var(--border-color);
        }
        .nav-toggle span {
            width: 18px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 14px;
        }
        .breadcrumb a {
            color: var(--text-secondary);
            transition: color 0.2s ease;
        }
        .breadcrumb a:hover {
            color: var(--accent-green);
        }
        .breadcrumb .sep {
            color: var(--text-muted);
            font-size: 12px;
        }
        .breadcrumb .current {
            color: var(--text-primary);
            font-weight: 500;
        }

        /* Classification header */
        .page-head {
            display: grid;
            grid-template-columns: 1fr auto;
            gap: 28px;
            align-items: end;
            padding: 28px 0 16px;
        }
        .page-head h1 {
            font-size: 32px;
            font-weight: 800;
            letter-spacing: 0.02em;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .page-head p {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.7;
        }

        /* Comparison list layout */
        .compare-layout {
            display: grid;
            grid-template-columns: 1fr 280px;
            gap: 28px;
            align-items: start;
        }
        .compare-cards {
            display: flex;
            flex-direction: column;
            gap: 18px;
        }
        .compare-card {
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 20px 22px;
            display: grid;
            grid-template-columns: 180px 1fr;
            gap: 20px;
            transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.2s ease;
            box-shadow: var(--shadow-card);
        }
        .compare-card:hover {
            border-color: var(--accent-green);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .compare-card .card-cover {
            width: 180px;
            height: 120px;
            object-fit: cover;
            border-radius: var(--radius-sm);
            background: var(--bg-panel-alt);
        }
        .compare-card .card-body {
            display: flex;
            flex-direction: column;
            gap: 8px;
            min-width: 0;
        }
        .compare-card .card-body h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.4;
            margin-bottom: 2px;
        }
        .compare-card .card-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }
        .compare-card .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
            font-size: 12px;
            color: var(--text-muted);
            margin-top: auto;
            padding-top: 8px;
        }
        .tag {
            display: inline-block;
            padding: 3px 10px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 500;
            background: var(--accent-green-dim);
            color: var(--accent-green);
            white-space: nowrap;
        }
        .tag.orange {
            background: rgba(255, 107, 53, 0.12);
            color: var(--accent-orange);
        }
        .tag.red {
            background: rgba(239, 68, 68, 0.12);
            color: var(--accent-red);
        }
        .num-badge {
            font-family: var(--font-num);
            font-size: 13px;
            color: var(--text-secondary);
            background: var(--bg-panel-alt);
            padding: 3px 10px;
            border-radius: 6px;
            white-space: nowrap;
        }

        /* Sidebar */
        .compare-sidebar {
            display: flex;
            flex-direction: column;
            gap: 18px;
            position: sticky;
            top: 88px;
        }
        .side-panel {
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 20px;
            box-shadow: var(--shadow-card);
        }
        .side-panel h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-primary);
            letter-spacing: 0.02em;
        }
        .stat-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .stat-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 10px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--border-color);
        }
        .stat-item:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }
        .stat-item .stat-label {
            font-size: 14px;
            color: var(--text-secondary);
        }
        .stat-item .stat-value {
            font-family: var(--font-num);
            font-size: 18px;
            font-weight: 700;
            color: var(--accent-green);
        }
        .stat-item .stat-value.orange {
            color: var(--accent-orange);
        }
        .stat-item .stat-value.red {
            color: var(--accent-red);
        }

        /* Topic cards */
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
        }
        .topic-card {
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 22px;
            box-shadow: var(--shadow-card);
            transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.2s ease;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .topic-card:hover {
            border-color: var(--accent-green);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .topic-card .topic-icon {
            width: 44px;
            height: 44px;
            background: var(--accent-green-dim);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--accent-green);
        }
        .topic-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.4;
        }
        .topic-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        /* Dimension panel */
        .dimension-panel {
            background: var(--bg-panel-alt);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 28px;
            box-shadow: var(--shadow-card);
        }
        .dimension-panel h2 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .dime-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }
        .dime-item {
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 16px 18px;
            display: flex;
            align-items: flex-start;
            gap: 12px;
            transition: border-color 0.25s ease;
        }
        .dime-item:hover {
            border-color: var(--border-hover);
        }
        .dime-item .dime-step {
            width: 28px;
            height: 28px;
            background: var(--accent-green-dim);
            color: var(--accent-green);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 13px;
            flex-shrink: 0;
            font-family: var(--font-num);
        }
        .dime-item .dime-text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .dime-item .dime-text strong {
            color: var(--text-primary);
            font-weight: 600;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 860px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color 0.25s ease, box-shadow 0.25s ease;
        }
        .faq-item.open {
            border-color: var(--accent-green);
            box-shadow: var(--shadow-card);
        }
        .faq-item details {
            display: block;
        }
        .faq-item summary {
            padding: 18px 22px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: color 0.2s ease;
            user-select: none;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary:hover {
            color: var(--accent-green);
        }
        .faq-item summary .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            transition: transform 0.3s ease;
        }
        .faq-item[open] summary .faq-icon {
            transform: rotate(45deg);
            color: var(--accent-green);
        }
        .faq-item .faq-answer {
            padding: 0 22px 18px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            border-top: 1px solid var(--border-color);
            padding-top: 15px;
        }

        /* Related articles */
        .article-list {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
        }
        .article-card {
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.2s ease;
            display: flex;
            flex-direction: column;
        }
        .article-card:hover {
            border-color: var(--accent-green);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .article-card .article-cover {
            width: 100%;
            height: 160px;
            object-fit: cover;
            border-radius: 0;
        }
        .article-card .article-body {
            padding: 16px 18px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            flex: 1;
        }
        .article-card .article-body h3 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.5;
            margin: 0;
        }
        .article-card .article-body p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }
        .article-card .article-meta {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: auto;
            padding-top: 10px;
        }

        /* Tag cloud */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }
        .tag-cloud .tag-item {
            padding: 7px 16px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            background: var(--bg-panel);
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
        }
        .tag-cloud .tag-item:hover {
            border-color: var(--accent-green);
            color: var(--accent-green);
            background: var(--accent-green-dim);
        }

        /* Footer */
        footer.site-footer {
            background: var(--bg-footer);
            border-top: 1px solid var(--border-color);
            padding: 48px 0 28px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            margin-bottom: 32px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }
        .footer-col p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 18px;
            color: var(--text-primary);
            margin-bottom: 10px;
        }
        .footer-logo .logo-icon {
            width: 30px;
            height: 30px;
            background: var(--accent-green);
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--bg-primary);
            font-size: 14px;
            font-weight: 800;
            flex-shrink: 0;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color 0.2s ease;
        }
        .footer-col ul li a:hover {
            color: var(--accent-green);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 22px;
            font-size: 13px;
            color: var(--text-muted);
            text-align: center;
            line-height: 1.7;
        }
        .footer-bottom a {
            color: var(--text-secondary);
            transition: color 0.2s ease;
        }
        .footer-bottom a:hover {
            color: var(--accent-green);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .compare-layout {
                grid-template-columns: 1fr;
            }
            .compare-sidebar {
                position: static;
                flex-direction: row;
                flex-wrap: wrap;
            }
            .side-panel {
                flex: 1 1 240px;
            }
            .topic-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .article-list {
                grid-template-columns: repeat(2, 1fr);
            }
            .dime-list {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-middle {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: var(--bg-primary);
                border-bottom: 1px solid var(--border-color);
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.35s ease, padding 0.35s ease;
                padding: 0 16px;
                z-index: 999;
            }
            .nav-middle.open {
                max-height: 420px;
                padding: 12px 16px;
            }
            .nav-middle li {
                white-space: normal;
            }
            .nav-middle a {
                padding: 12px 8px;
                border-bottom: 1px solid var(--border-color);
                border-radius: 0;
            }
            .nav-right .nav-status {
                display: none;
            }
            .compare-card {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .compare-card .card-cover {
                width: 100%;
                height: 180px;
            }
            .topic-grid {
                grid-template-columns: 1fr;
            }
            .article-list {
                grid-template-columns: 1fr;
            }
            .page-head {
                grid-template-columns: 1fr;
                gap: 16px;
                padding-bottom: 8px;
            }
            .page-head h1 {
                font-size: 26px;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 22px;
            }
            .compare-sidebar {
                flex-direction: column;
            }
            .nav-cta {
                padding: 8px 14px;
                font-size: 13px;
            }
        }

        @media (max-width: 520px) {
            :root {
                --spacing-section: 28px;
            }
            .container {
                padding: 0 12px;
            }
            .page-head h1 {
                font-size: 22px;
            }
            .section-header h2 {
                font-size: 19px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .compare-card {
                padding: 16px;
            }
            .compare-card .card-cover {
                height: 140px;
            }
            .dimension-panel {
                padding: 20px;
            }
            .nav-cta {
                padding: 7px 12px;
                font-size: 12px;
            }
        }