/* roulang page: index */
:root {
            --color-primary: #0B342B;
            --color-primary-dark: #103D33;
            --color-primary-deep: #082920;
            --color-accent: #C9A24B;
            --color-accent-light: #D4AF37;
            --color-accent-soft: #E8D5A3;
            --color-bg: #F7F5F0;
            --color-bg-alt: #EEF2EE;
            --color-text: #1F2A26;
            --color-text-secondary: #5D6A64;
            --color-text-light: #8A9993;
            --color-white: #FFFFFF;
            --color-border: rgba(11, 52, 43, 0.08);
            --color-border-strong: rgba(11, 52, 43, 0.16);
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", sans-serif;
            --font-numeric: "Inter", "Roboto", "PingFang SC", sans-serif;
            --radius-card: 14px;
            --radius-btn: 8px;
            --radius-pill: 999px;
            --shadow-card: 0 4px 16px rgba(11, 52, 43, 0.06);
            --shadow-hover: 0 10px 24px rgba(11, 52, 43, 0.12);
            --shadow-deep: 0 16px 40px rgba(11, 52, 43, 0.18);
            --transition: 0.25s ease;
            --max-width: 1200px;
            --header-height: 68px;
            --section-pad: 72px;
            --section-pad-mobile: 44px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            color: var(--color-text);
            background: var(--color-bg);
            line-height: 1.8;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition), background-color var(--transition), border-color var(--transition), opacity var(--transition);
        }

        button {
            font-family: var(--font-sans);
            cursor: pointer;
            border: none;
            background: none;
            font-size: inherit;
            transition: background-color var(--transition), color var(--transition), border-color var(--transition), box-shadow var(--transition), transform var(--transition);
        }

        input,
        select,
        textarea {
            font-family: var(--font-sans);
            font-size: 15px;
            color: var(--color-text);
            border-radius: 8px;
            border: 1px solid #D9E0DB;
            background: var(--color-white);
            padding: 10px 14px;
            outline: none;
            transition: border-color var(--transition), box-shadow var(--transition);
        }

        input:focus,
        select:focus,
        textarea:focus {
            border-color: var(--color-accent);
            box-shadow: 0 0 0 3px rgba(201, 162, 75, 0.12);
        }

        input::placeholder,
        textarea::placeholder {
            color: #9AA8A2;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 28px;
        }

        .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;
        }

        /* ========== Header / Navigation ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--color-primary-deep);
            height: var(--header-height);
            display: flex;
            align-items: center;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.18);
            border-bottom: 1px solid rgba(201, 162, 75, 0.2);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .logo {
            display: flex;
            align-items: baseline;
            gap: 4px;
            font-weight: 700;
            font-size: 22px;
            color: var(--color-white);
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }

        .logo .logo-mark {
            color: var(--color-accent);
            font-size: 24px;
            margin-right: 2px;
        }

        .logo .logo-sub {
            font-size: 14px;
            font-weight: 400;
            color: rgba(255, 255, 255, 0.65);
            margin-left: 8px;
            letter-spacing: 0.3px;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .main-nav a {
            color: rgba(255, 255, 255, 0.78);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 6px;
            letter-spacing: 0.3px;
            position: relative;
        }

        .main-nav a:hover {
            color: var(--color-white);
            background: rgba(255, 255, 255, 0.08);
        }

        .main-nav a.active {
            color: var(--color-accent);
        }

        .main-nav a.active::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 28px;
            height: 2px;
            background: var(--color-accent);
            border-radius: 2px;
        }

        .nav-cta {
            background: var(--color-accent);
            color: var(--color-primary-deep);
            font-weight: 600;
            font-size: 14px;
            padding: 9px 20px;
            border-radius: 6px;
            letter-spacing: 0.4px;
            margin-left: 12px;
            flex-shrink: 0;
        }

        .nav-cta:hover {
            background: var(--color-accent-light);
            color: var(--color-primary-deep);
            transform: translateY(-1px);
        }

        .nav-cta:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            width: 36px;
            height: 36px;
            align-items: center;
            justify-content: center;
            border-radius: 6px;
            background: rgba(255, 255, 255, 0.08);
            padding: 7px;
            flex-shrink: 0;
        }

        .hamburger span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--color-white);
            border-radius: 2px;
            transition: transform var(--transition), opacity var(--transition);
        }

        .hamburger.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .hamburger.open span:nth-child(2) {
            opacity: 0;
        }

        .hamburger.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--color-primary-deep);
            z-index: 99;
            flex-direction: column;
            padding: 24px 20px 40px;
            overflow-y: auto;
        }

        .mobile-nav.open {
            display: flex;
        }

        .mobile-nav a {
            color: rgba(255, 255, 255, 0.8);
            font-size: 17px;
            font-weight: 500;
            padding: 14px 12px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            letter-spacing: 0.4px;
        }

        .mobile-nav a:hover,
        .mobile-nav a.active {
            color: var(--color-accent);
        }

        .mobile-nav .mobile-cta {
            margin-top: 20px;
            background: var(--color-accent);
            color: var(--color-primary-deep);
            text-align: center;
            font-weight: 600;
            border-radius: 8px;
            padding: 14px 20px;
            border-bottom: none;
            font-size: 16px;
        }

        .mobile-nav .mobile-cta:hover {
            background: var(--color-accent-light);
            color: var(--color-primary-deep);
        }

        /* ========== Hero ========== */
        .hero {
            position: relative;
            min-height: 560px;
            display: flex;
            align-items: center;
            background: var(--color-primary-deep);
            overflow: hidden;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            object-position: center;
            opacity: 0.38;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(8, 41, 32, 0.92) 0%, rgba(11, 52, 43, 0.78) 45%, rgba(8, 41, 32, 0.88) 100%);
        }

        .hero .container {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 48px;
            align-items: center;
            padding-top: 48px;
            padding-bottom: 48px;
        }

        .hero-content h1 {
            font-size: 44px;
            font-weight: 700;
            line-height: 1.25;
            color: var(--color-white);
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }

        .hero-content h1 .accent-text {
            color: var(--color-accent);
        }

        .hero-sub {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.82);
            line-height: 1.9;
            margin-bottom: 28px;
            max-width: 520px;
        }

        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            font-size: 16px;
            font-weight: 600;
            border-radius: 8px;
            letter-spacing: 0.4px;
            transition: all var(--transition);
            border: 2px solid transparent;
        }

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

        .btn-primary:hover {
            background: var(--color-accent-light);
            border-color: var(--color-accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(201, 162, 75, 0.3);
        }

        .btn-primary:focus-visible {
            outline: 3px solid rgba(201, 162, 75, 0.5);
            outline-offset: 3px;
        }

        .btn-outline-light {
            background: transparent;
            color: var(--color-white);
            border-color: rgba(255, 255, 255, 0.45);
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.7);
            transform: translateY(-2px);
        }

        .hero-countdown {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(201, 162, 75, 0.16);
            border: 1px solid rgba(201, 162, 75, 0.4);
            border-radius: 999px;
            padding: 6px 16px;
            font-size: 13px;
            font-weight: 500;
            color: var(--color-accent-soft);
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }

        .hero-countdown .countdown-num {
            font-family: var(--font-numeric);
            font-weight: 700;
            font-size: 15px;
            color: var(--color-accent);
        }

        .hero-metrics {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }

        .hero-metric-card {
            background: rgba(255, 255, 255, 0.07);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.14);
            border-radius: 12px;
            padding: 18px 20px;
            text-align: center;
            transition: background var(--transition), transform var(--transition);
        }

        .hero-metric-card:hover {
            background: rgba(255, 255, 255, 0.11);
            transform: translateY(-3px);
        }

        .hero-metric-card .metric-num {
            font-family: var(--font-numeric);
            font-size: 32px;
            font-weight: 700;
            color: var(--color-accent);
            line-height: 1.3;
        }

        .hero-metric-card .metric-label {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.65);
            letter-spacing: 0.5px;
            margin-top: 4px;
        }

        /* ========== Sections ========== */
        .section {
            padding: var(--section-pad) 0;
        }

        .section-alt {
            background: var(--color-bg-alt);
        }

        .section-dark {
            background: var(--color-primary);
            color: var(--color-white);
        }

        .section-header {
            max-width: 720px;
            margin-bottom: 40px;
        }

        .section-header.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .section-tag {
            display: inline-block;
            background: #E4EFE9;
            color: var(--color-primary);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 14px;
            border-radius: 999px;
            letter-spacing: 0.6px;
            margin-bottom: 12px;
            text-transform: uppercase;
        }

        .section-dark .section-tag {
            background: rgba(201, 162, 75, 0.18);
            color: var(--color-accent-soft);
        }

        .section-title {
            font-size: 30px;
            font-weight: 600;
            line-height: 1.3;
            color: inherit;
            letter-spacing: 0.3px;
            margin-bottom: 14px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--color-text-secondary);
            line-height: 1.9;
        }

        .section-dark .section-desc {
            color: rgba(255, 255, 255, 0.7);
        }

        .section-header.center .section-desc {
            margin-left: auto;
            margin-right: auto;
        }

        /* ========== Metrics Dashboard ========== */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 18px;
        }

        .metric-card {
            background: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 22px 20px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
            position: relative;
        }

        .metric-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--color-border-strong);
        }

        .metric-card .metric-value {
            font-family: var(--font-numeric);
            font-size: 34px;
            font-weight: 700;
            color: var(--color-primary);
            line-height: 1.25;
        }

        .metric-card .metric-value .unit {
            font-size: 16px;
            font-weight: 500;
            color: var(--color-text-secondary);
            margin-left: 2px;
        }

        .metric-card .metric-name {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text);
            margin: 6px 0 4px;
        }

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

        .metric-card .trend-bar {
            height: 4px;
            background: #E4EFE9;
            border-radius: 4px;
            margin-top: 10px;
            overflow: hidden;
        }

        .metric-card .trend-bar .trend-fill {
            height: 100%;
            background: var(--color-accent);
            border-radius: 4px;
            transition: width var(--transition);
        }

        .metric-card .metric-tag {
            position: absolute;
            top: 16px;
            right: 16px;
            font-size: 11px;
            font-weight: 600;
            color: var(--color-accent);
            background: rgba(201, 162, 75, 0.12);
            padding: 2px 10px;
            border-radius: 999px;
            letter-spacing: 0.4px;
        }

        /* ========== Service Matrix ========== */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .service-card {
            background: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 26px 22px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }

        .service-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .service-icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: #E4EFE9;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--color-primary);
            margin-bottom: 16px;
            flex-shrink: 0;
        }

        .service-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 10px;
            line-height: 1.45;
        }

        .service-card p {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.8;
            flex-grow: 1;
            margin-bottom: 14px;
        }

        .service-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: color var(--transition);
        }

        .service-link:hover {
            color: var(--color-accent);
        }

        .service-link::after {
            content: "→";
            font-weight: 700;
            transition: transform var(--transition);
        }

        .service-link:hover::after {
            transform: translateX(3px);
        }

        /* ========== Comparison ========== */
        .comparison-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }

        .comparison-panel {
            background: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 28px 26px;
            box-shadow: var(--shadow-card);
        }

        .comparison-panel.highlight {
            border-color: var(--color-accent);
            box-shadow: 0 6px 20px rgba(201, 162, 75, 0.12);
        }

        .comparison-panel .panel-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--color-primary);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .comparison-panel .panel-title .badge-diff {
            font-size: 12px;
            font-weight: 600;
            background: rgba(201, 162, 75, 0.14);
            color: #8B6F1A;
            padding: 2px 10px;
            border-radius: 999px;
        }

        .comparison-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 0;
            border-bottom: 1px solid #F0F2F1;
            font-size: 15px;
        }

        .comparison-item:last-child {
            border-bottom: none;
        }

        .comparison-item .item-label {
            color: var(--color-text-secondary);
        }

        .comparison-item .item-value {
            font-weight: 600;
            color: var(--color-text);
            font-family: var(--font-numeric);
        }

        .comparison-item .item-value.highlight-value {
            color: var(--color-accent);
            font-weight: 700;
        }

        .comparison-item .item-diff {
            font-size: 12px;
            font-weight: 600;
            padding: 2px 8px;
            border-radius: 6px;
            margin-left: 8px;
        }

        .comparison-item .item-diff.up {
            background: #E4EFE9;
            color: #2D6A4F;
        }

        .comparison-item .item-diff.down {
            background: #FBE8E8;
            color: #B34A4A;
        }

        /* ========== Timeline / Milestones ========== */
        .timeline-grid {
            display: flex;
            gap: 24px;
            justify-content: space-between;
            position: relative;
            padding: 20px 0 10px;
        }

        .timeline-grid::before {
            content: "";
            position: absolute;
            top: 28px;
            left: 30px;
            right: 30px;
            height: 2px;
            background: #D9E0DB;
            border-radius: 2px;
        }

        .timeline-item {
            flex: 1;
            text-align: center;
            position: relative;
            z-index: 1;
        }

        .timeline-dot {
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: var(--color-accent);
            border: 3px solid var(--color-white);
            box-shadow: 0 2px 8px rgba(201, 162, 75, 0.3);
            margin: 0 auto 12px;
            position: relative;
            z-index: 2;
        }

        .timeline-year {
            font-family: var(--font-numeric);
            font-size: 22px;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 4px;
        }

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

        .timeline-desc {
            font-size: 13px;
            color: var(--color-text-secondary);
            line-height: 1.7;
        }

        /* ========== News Cards ========== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
        }

        .news-card {
            background: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }

        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .news-card .news-thumb {
            aspect-ratio: 16/9;
            overflow: hidden;
            background: #E4EFE9;
        }

        .news-card .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .news-card:hover .news-thumb img {
            transform: scale(1.04);
        }

        .news-card .news-body {
            padding: 20px 20px 18px;
            display: flex;
            flex-direction: column;
            flex-grow: 1;
        }

        .news-card .news-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--color-text);
            line-height: 1.45;
            margin-bottom: 8px;
        }

        .news-card .news-summary {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.75;
            flex-grow: 1;
            margin-bottom: 12px;
        }

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

        .news-card .news-date {
            background: #E4EFE9;
            color: var(--color-primary);
            padding: 2px 10px;
            border-radius: 999px;
            font-weight: 600;
        }

        .section-footer-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 15px;
            font-weight: 600;
            color: var(--color-primary);
            margin-top: 28px;
            transition: color var(--transition);
        }

        .section-footer-link:hover {
            color: var(--color-accent);
        }

        .section-footer-link::after {
            content: "→";
            transition: transform var(--transition);
        }

        .section-footer-link:hover::after {
            transform: translateX(4px);
        }

        /* ========== Guarantee ========== */
        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .guarantee-card {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.14);
            border-radius: var(--radius-card);
            padding: 24px 20px;
            transition: all var(--transition);
            text-align: center;
        }

        .guarantee-card:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-3px);
            border-color: rgba(201, 162, 75, 0.4);
        }

        .guarantee-icon {
            font-size: 28px;
            color: var(--color-accent);
            margin-bottom: 12px;
        }

        .guarantee-card h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-white);
            margin-bottom: 8px;
        }

        .guarantee-card p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.7;
        }

        /* ========== Brand Intro ========== */
        .brand-intro-wrap {
            display: grid;
            grid-template-columns: 1.4fr 1fr;
            gap: 36px;
            align-items: center;
        }

        .brand-intro-text {
            font-size: 15px;
            color: var(--color-text-secondary);
            line-height: 2;
        }

        .brand-intro-text p {
            margin-bottom: 14px;
        }

        .brand-intro-text p:last-child {
            margin-bottom: 0;
        }

        .brand-intro-highlight {
            font-weight: 600;
            color: var(--color-primary);
        }

        .brand-image-frame {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-deep);
        }

        .brand-image-frame img {
            width: 100%;
            height: auto;
            object-fit: cover;
            aspect-ratio: 4/3;
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 800px;
        }

        .faq-item {
            background: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: 10px;
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color var(--transition), box-shadow var(--transition);
        }

        .faq-item:hover {
            border-color: var(--color-border-strong);
        }

        .faq-item.open {
            border-color: var(--color-accent);
            box-shadow: 0 4px 16px rgba(201, 162, 75, 0.1);
        }

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

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

        .faq-icon {
            font-size: 20px;
            color: var(--color-text-secondary);
            flex-shrink: 0;
            transition: transform var(--transition);
            line-height: 1;
        }

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

        .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: 300px;
            padding: 0 20px 18px;
        }

        .faq-answer p {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.9;
            background: #F9FAF9;
            border-radius: 8px;
            padding: 14px 16px;
        }

        /* ========== Scenario Cards ========== */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .scenario-card {
            background: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
        }

        .scenario-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .scenario-card .scenario-thumb {
            aspect-ratio: 16/10;
            overflow: hidden;
            background: #E4EFE9;
        }

        .scenario-card .scenario-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .scenario-card:hover .scenario-thumb img {
            transform: scale(1.04);
        }

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

        .scenario-card h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 6px;
        }

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

        /* ========== User Voice ========== */
        .voice-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .voice-card {
            background: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 22px 20px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
        }

        .voice-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
        }

        .voice-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 12px;
        }

        .voice-avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--color-primary);
            color: var(--color-accent);
            font-weight: 700;
            font-size: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .voice-info .voice-name {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text);
        }

        .voice-info .voice-time {
            font-size: 12px;
            color: var(--color-text-light);
        }

        .voice-text {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.8;
        }

        /* ========== Form ========== */
        .form-card {
            background: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 32px 28px;
            box-shadow: var(--shadow-card);
            max-width: 640px;
        }

        .form-group {
            margin-bottom: 16px;
        }

        .form-group label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 6px;
        }

        .form-group input,
        .form-group select {
            width: 100%;
            height: 44px;
            font-size: 15px;
        }

        .form-submit {
            width: 100%;
            height: 48px;
            background: var(--color-accent);
            color: var(--color-primary-deep);
            font-size: 16px;
            font-weight: 600;
            border-radius: 8px;
            letter-spacing: 0.4px;
            transition: all var(--transition);
            border: 2px solid var(--color-accent);
        }

        .form-submit:hover {
            background: var(--color-accent-light);
            border-color: var(--color-accent-light);
            transform: translateY(-1px);
        }

        .form-submit:focus-visible {
            outline: 3px solid rgba(201, 162, 75, 0.5);
            outline-offset: 3px;
        }

        .form-success {
            display: none;
            text-align: center;
            padding: 20px;
            background: #E4EFE9;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            color: #2D6A4F;
        }

        .form-success.show {
            display: block;
        }

        /* ========== Bottom Info / Footer ========== */
        .bottom-info {
            background: var(--color-primary-deep);
            color: rgba(255, 255, 255, 0.7);
            padding: 40px 0 30px;
            font-size: 13px;
        }

        .bottom-info-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 28px;
        }

        .bottom-info h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-white);
            margin-bottom: 12px;
            letter-spacing: 0.3px;
        }

        .bottom-info p {
            font-size: 13px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
        }

        .bottom-info ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .bottom-info ul li {
            margin-bottom: 6px;
        }

        .bottom-info ul a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 13px;
            transition: color var(--transition);
        }

        .bottom-info ul a:hover {
            color: var(--color-accent);
        }

        .bottom-info .copyright-row {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.5);
        }

        .bottom-info .copyright-row a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 12px;
        }

        .bottom-info .copyright-row a:hover {
            color: var(--color-accent);
        }

        .bottom-info .icp-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px;
        }

        /* ========== Responsive ========== */
        @media screen and (min-width: 1024px) {
            .hero .container {
                grid-template-columns: 1.2fr 1fr;
            }
        }

        @media screen and (max-width: 1023px) and (min-width: 769px) {
            .metrics-grid {
                grid-template-columns: repeat(3, 1fr);
            }

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

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

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

            .timeline-grid {
                flex-direction: column;
                align-items: flex-start;
                gap: 0;
            }

            .timeline-grid::before {
                display: none;
            }

            .timeline-item {
                text-align: left;
                display: flex;
                gap: 16px;
                align-items: flex-start;
                margin-bottom: 28px;
            }

            .timeline-dot {
                margin: 4px 0 0 0;
                flex-shrink: 0;
            }

            .timeline-content {
                flex: 1;
            }
        }

        @media screen and (max-width: 768px) {
            :root {
                --header-height: 60px;
                --section-pad: 44px;
            }

            .main-nav {
                display: none;
            }

            .hamburger {
                display: flex;
            }

            .nav-cta {
                display: none;
            }

            .hero {
                min-height: auto;
                padding: 40px 0;
            }

            .hero .container {
                grid-template-columns: 1fr;
                gap: 28px;
                padding-top: 20px;
                padding-bottom: 20px;
            }

            .hero-content h1 {
                font-size: 28px;
                line-height: 1.35;
            }

            .hero-sub {
                font-size: 15px;
                line-height: 1.8;
            }

            .hero-metrics {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }

            .hero-metric-card .metric-num {
                font-size: 24px;
            }

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

            .service-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }

            .comparison-wrap {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .news-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

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

            .scenario-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }

            .voice-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }

            .brand-intro-wrap {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .timeline-grid {
                flex-direction: column;
                align-items: flex-start;
                gap: 0;
                padding: 10px 0;
            }

            .timeline-grid::before {
                display: none;
            }

            .timeline-item {
                text-align: left;
                display: flex;
                gap: 14px;
                align-items: flex-start;
                margin-bottom: 24px;
            }

            .timeline-dot {
                margin: 4px 0 0 0;
                flex-shrink: 0;
            }

            .timeline-content {
                flex: 1;
            }

            .section-title {
                font-size: 24px;
            }

            .section-header {
                margin-bottom: 28px;
            }

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

            .bottom-info .copyright-row {
                flex-direction: column;
                text-align: center;
                gap: 10px;
            }

            .bottom-info .icp-row {
                justify-content: center;
                flex-wrap: wrap;
            }

            .form-card {
                padding: 24px 18px;
            }

            .section {
                padding: var(--section-pad) 0;
            }

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

            .hero-actions .btn {
                width: 100%;
            }
        }

        @media screen and (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

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

            .hero-metrics {
                grid-template-columns: 1fr;
            }

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

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

            .logo {
                font-size: 19px;
            }

            .logo .logo-sub {
                font-size: 12px;
                margin-left: 4px;
            }

            .section-title {
                font-size: 21px;
            }
        }

/* roulang page: category1 */
:root {
            --color-primary: #0B342B;
            --color-primary-dark: #103D33;
            --color-primary-deep: #082920;
            --color-accent: #C9A24B;
            --color-accent-light: #D4AF37;
            --color-accent-soft: #E8D5A3;
            --color-bg: #F7F5F0;
            --color-bg-alt: #EEF2EE;
            --color-text: #1F2A26;
            --color-text-secondary: #5D6A64;
            --color-text-light: #8A9993;
            --color-white: #FFFFFF;
            --color-border: rgba(11, 52, 43, 0.08);
            --color-border-strong: rgba(11, 52, 43, 0.16);
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", sans-serif;
            --font-numeric: "Inter", "Roboto", "PingFang SC", sans-serif;
            --radius-card: 14px;
            --radius-btn: 8px;
            --radius-pill: 999px;
            --shadow-card: 0 4px 16px rgba(11, 52, 43, 0.06);
            --shadow-hover: 0 10px 24px rgba(11, 52, 43, 0.12);
            --shadow-deep: 0 16px 40px rgba(11, 52, 43, 0.18);
            --transition: 0.25s ease;
            --max-width: 1200px;
            --header-height: 68px;
            --section-pad: 72px;
            --section-pad-mobile: 44px;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }
        body {
            font-family: var(--font-sans);
            color: var(--color-text);
            background: var(--color-bg);
            line-height: 1.8;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition), background-color var(--transition), border-color var(--transition), opacity var(--transition);
        }
        button {
            font-family: var(--font-sans);
            cursor: pointer;
            border: none;
            background: none;
            font-size: inherit;
            transition: background-color var(--transition), color var(--transition), border-color var(--transition), box-shadow var(--transition), transform var(--transition);
        }
        input,
        select,
        textarea {
            font-family: var(--font-sans);
            font-size: 15px;
            color: var(--color-text);
            border-radius: 8px;
            border: 1px solid #D9E0DB;
            background: var(--color-white);
            padding: 10px 14px;
            outline: none;
            transition: border-color var(--transition), box-shadow var(--transition);
            width: 100%;
        }
        input:focus,
        select:focus,
        textarea:focus {
            border-color: var(--color-accent);
            box-shadow: 0 0 0 3px rgba(201, 162, 75, 0.12);
        }
        input::placeholder,
        textarea::placeholder {
            color: #9AA8A2;
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 28px;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--color-primary-deep);
            height: var(--header-height);
            display: flex;
            align-items: center;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.18);
            border-bottom: 1px solid rgba(201, 162, 75, 0.2);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .logo {
            display: flex;
            align-items: baseline;
            gap: 4px;
            font-weight: 700;
            font-size: 22px;
            color: var(--color-white);
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }
        .logo .logo-mark {
            color: var(--color-accent);
            font-size: 24px;
            margin-right: 2px;
        }
        .logo .logo-sub {
            font-size: 14px;
            font-weight: 400;
            color: rgba(255, 255, 255, 0.65);
            margin-left: 8px;
            letter-spacing: 0.3px;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .main-nav a {
            color: rgba(255, 255, 255, 0.78);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 6px;
            letter-spacing: 0.3px;
            position: relative;
        }
        .main-nav a:hover {
            color: var(--color-white);
            background: rgba(255, 255, 255, 0.08);
        }
        .main-nav a.active {
            color: var(--color-accent);
        }
        .main-nav a.active::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 28px;
            height: 2px;
            background: var(--color-accent);
            border-radius: 2px;
        }
        .nav-cta {
            background: var(--color-accent);
            color: var(--color-primary-deep);
            font-weight: 600;
            font-size: 14px;
            padding: 9px 20px;
            border-radius: 6px;
            letter-spacing: 0.4px;
            margin-left: 12px;
            flex-shrink: 0;
        }
        .nav-cta:hover {
            background: var(--color-accent-light);
            color: var(--color-primary-deep);
            transform: translateY(-1px);
        }
        .nav-cta:focus {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            border: none;
            cursor: pointer;
            padding: 6px;
            z-index: 110;
            position: relative;
        }
        .hamburger span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--color-white);
            border-radius: 2px;
            transition: transform var(--transition), opacity var(--transition);
        }
        .hamburger.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        @media (max-width: 890px) {
            .hamburger {
                display: flex;
            }
            .main-nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--color-primary-deep);
                flex-direction: column;
                align-items: stretch;
                padding: 16px 28px 28px;
                gap: 8px;
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: transform 0.3s ease, opacity 0.3s ease;
                box-shadow: 0 16px 32px rgba(0, 0, 0, 0.25);
                border-bottom: 1px solid rgba(201, 162, 75, 0.2);
            }
            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .main-nav a {
                padding: 14px 16px;
                font-size: 16px;
                border-radius: 8px;
                text-align: left;
            }
            .main-nav a.active::after {
                display: none;
            }
            .main-nav a.active {
                background: rgba(201, 162, 75, 0.12);
            }
            .nav-cta {
                margin-left: 0;
                margin-top: 8px;
                text-align: center;
                padding: 13px 20px;
            }
        }
        .breadcrumb {
            padding: 20px 0 8px;
            font-size: 14px;
            color: var(--color-text-secondary);
            letter-spacing: 0.3px;
        }
        .breadcrumb a {
            color: var(--color-primary);
            font-weight: 500;
        }
        .breadcrumb a:hover {
            color: var(--color-accent);
        }
        .breadcrumb .sep {
            margin: 0 8px;
            color: var(--color-text-light);
        }
        .breadcrumb .current {
            color: var(--color-accent);
            font-weight: 600;
        }
        .page-head {
            padding: 32px 0 28px;
        }
        .page-head h1 {
            font-size: 38px;
            font-weight: 700;
            line-height: 1.25;
            color: var(--color-primary);
            letter-spacing: 0.5px;
        }
        .page-head .sub {
            font-size: 16px;
            color: var(--color-text-secondary);
            margin-top: 12px;
            max-width: 680px;
            line-height: 1.9;
        }
        section {
            padding: var(--section-pad) 0;
        }
        .section-alt {
            background: var(--color-bg-alt);
        }
        .section-dark {
            background: var(--color-primary);
            color: var(--color-white);
        }
        .section-dark .section-title {
            color: var(--color-white);
        }
        .section-dark .section-sub {
            color: rgba(255, 255, 255, 0.7);
        }
        .section-title {
            font-size: 28px;
            font-weight: 600;
            line-height: 1.3;
            color: var(--color-primary);
            letter-spacing: 0.4px;
            margin-bottom: 8px;
        }
        .section-sub {
            font-size: 15px;
            color: var(--color-text-secondary);
            margin-bottom: 32px;
            max-width: 560px;
            line-height: 1.8;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .main-layout {
            display: grid;
            grid-template-columns: 1fr 360px;
            gap: 32px;
            align-items: start;
        }
        .article-feature {
            background: var(--color-white);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            transition: box-shadow var(--transition), transform var(--transition);
        }
        .article-feature:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .article-feature .cover {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--color-bg-alt);
        }
        .article-feature .cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .article-feature:hover .cover img {
            transform: scale(1.03);
        }
        .article-feature .body {
            padding: 20px 24px 24px;
        }
        .article-feature .meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--color-text-light);
            margin-bottom: 8px;
        }
        .article-feature .meta .tag {
            font-weight: 600;
            font-size: 12px;
            color: var(--color-primary);
            background: #E4EFE9;
            border-radius: var(--radius-pill);
            padding: 3px 12px;
            letter-spacing: 0.5px;
        }
        .article-feature h3 {
            font-size: 20px;
            font-weight: 600;
            line-height: 1.45;
            color: var(--color-text);
            margin-bottom: 8px;
            letter-spacing: 0.3px;
        }
        .article-feature h3 a:hover {
            color: var(--color-accent);
        }
        .article-feature p {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.8;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-list {
            display: flex;
            flex-direction: column;
            gap: 18px;
        }
        .article-item {
            background: var(--color-white);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            display: grid;
            grid-template-columns: 180px 1fr;
            gap: 18px;
            transition: box-shadow var(--transition), transform var(--transition);
        }
        .article-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .article-item .cover {
            aspect-ratio: 4 / 3;
            overflow: hidden;
            background: var(--color-bg-alt);
            min-height: 100%;
        }
        .article-item .cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .article-item:hover .cover img {
            transform: scale(1.04);
        }
        .article-item .body {
            padding: 16px 20px 16px 0;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .article-item .meta {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 12px;
            color: var(--color-text-light);
            margin-bottom: 6px;
        }
        .article-item .meta .tag {
            font-weight: 600;
            font-size: 11px;
            color: var(--color-primary);
            background: #E4EFE9;
            border-radius: var(--radius-pill);
            padding: 2px 10px;
            letter-spacing: 0.4px;
        }
        .article-item h4 {
            font-size: 16px;
            font-weight: 600;
            line-height: 1.5;
            color: var(--color-text);
            margin-bottom: 4px;
            letter-spacing: 0.2px;
        }
        .article-item h4 a:hover {
            color: var(--color-accent);
        }
        .article-item p {
            font-size: 13px;
            color: var(--color-text-secondary);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .side-card {
            background: var(--color-white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            padding: 22px 24px;
            margin-bottom: 20px;
        }
        .side-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--color-primary);
            margin-bottom: 16px;
            letter-spacing: 0.3px;
            border-bottom: 2px solid var(--color-accent);
            padding-bottom: 10px;
            display: inline-block;
        }
        .side-card .hot-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .side-card .hot-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 14px;
            line-height: 1.6;
            color: var(--color-text);
        }
        .side-card .hot-list li .rank {
            font-weight: 700;
            font-size: 16px;
            color: var(--color-accent);
            font-family: var(--font-numeric);
            flex-shrink: 0;
            min-width: 22px;
            text-align: center;
        }
        .side-card .hot-list li a {
            color: var(--color-text);
        }
        .side-card .hot-list li a:hover {
            color: var(--color-accent);
        }
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .tag-cloud a {
            font-size: 13px;
            font-weight: 500;
            color: var(--color-primary);
            background: #E4EFE9;
            border-radius: var(--radius-pill);
            padding: 6px 16px;
            letter-spacing: 0.3px;
            transition: background-color var(--transition), color var(--transition), transform var(--transition);
        }
        .tag-cloud a:hover {
            background: var(--color-primary);
            color: var(--color-white);
            transform: translateY(-2px);
        }
        .subscribe-form {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .subscribe-form label {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text);
            letter-spacing: 0.3px;
        }
        .subscribe-form .row {
            display: flex;
            gap: 12px;
        }
        .subscribe-form .row input,
        .subscribe-form .row select {
            flex: 1;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            font-size: 15px;
            letter-spacing: 0.4px;
            border-radius: var(--radius-btn);
            padding: 12px 24px;
            cursor: pointer;
            transition: background-color var(--transition), color var(--transition), box-shadow var(--transition), transform var(--transition);
            border: none;
        }
        .btn-primary {
            background: var(--color-accent);
            color: var(--color-primary-deep);
        }
        .btn-primary:hover {
            background: var(--color-accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 16px rgba(201, 162, 75, 0.3);
        }
        .btn-primary:focus {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }
        .btn-outline {
            background: transparent;
            color: var(--color-primary);
            border: 1px solid var(--color-border-strong);
        }
        .btn-outline:hover {
            border-color: var(--color-accent);
            color: var(--color-accent);
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 14px;
            border-radius: 6px;
        }
        .more-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            font-size: 14px;
            color: var(--color-accent);
            letter-spacing: 0.3px;
            cursor: pointer;
        }
        .more-link:hover {
            color: var(--color-primary);
        }
        .form-success {
            display: none;
            background: #E4EFE9;
            border: 1px solid #B7D4C2;
            color: var(--color-primary);
            padding: 14px 18px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 500;
            letter-spacing: 0.3px;
        }
        .form-success.show {
            display: block;
        }
        .topic-entry {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .topic-card {
            background: var(--color-white);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            transition: box-shadow var(--transition), transform var(--transition);
        }
        .topic-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .topic-card .cover {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--color-bg-alt);
        }
        .topic-card .cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .topic-card:hover .cover img {
            transform: scale(1.04);
        }
        .topic-card .body {
            padding: 18px 20px 20px;
        }
        .topic-card h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 4px;
            letter-spacing: 0.2px;
        }
        .topic-card p {
            font-size: 13px;
            color: var(--color-text-secondary);
            line-height: 1.7;
        }
        .site-footer {
            background: var(--color-primary-deep);
            color: rgba(255, 255, 255, 0.75);
            padding: 48px 0 32px;
            font-size: 14px;
            line-height: 1.8;
        }
        .site-footer .container {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 32px;
        }
        .site-footer h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-white);
            margin-bottom: 12px;
            letter-spacing: 0.4px;
        }
        .site-footer .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .site-footer .footer-links a {
            color: rgba(255, 255, 255, 0.65);
        }
        .site-footer .footer-links a:hover {
            color: var(--color-accent);
        }
        .site-footer .footer-bottom {
            margin-top: 32px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.55);
        }
        .site-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.65);
        }
        .site-footer .footer-bottom a:hover {
            color: var(--color-accent);
        }
        .site-footer .footer-brand {
            font-weight: 700;
            font-size: 18px;
            color: var(--color-white);
            letter-spacing: 0.5px;
            margin-bottom: 8px;
        }
        .site-footer .footer-brand .logo-mark {
            color: var(--color-accent);
        }
        @media (max-width: 1024px) {
            .main-layout {
                grid-template-columns: 1fr;
            }
            .topic-entry {
                grid-template-columns: repeat(2, 1fr);
            }
            .grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 18px;
            }
            :root {
                --section-pad: 40px;
                --header-height: 60px;
            }
            .page-head h1 {
                font-size: 30px;
            }
            .section-title {
                font-size: 23px;
            }
            .grid-2,
            .grid-3,
            .grid-4,
            .topic-entry {
                grid-template-columns: 1fr;
            }
            .article-item {
                grid-template-columns: 120px 1fr;
                gap: 12px;
            }
            .article-item .body {
                padding: 12px 14px 12px 0;
            }
            .article-item .cover {
                aspect-ratio: 4 / 3;
                min-height: 100%;
            }
            .article-feature .body {
                padding: 16px 18px 20px;
            }
            .site-footer .container {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .subscribe-form .row {
                flex-direction: column;
            }
            .side-card {
                padding: 18px;
            }
        }
        @media (max-width: 520px) {
            .article-item {
                grid-template-columns: 1fr;
            }
            .article-item .cover {
                aspect-ratio: 16 / 9;
                min-height: auto;
            }
            .article-item .body {
                padding: 14px 16px 16px;
            }
            .page-head h1 {
                font-size: 26px;
            }
        }

/* roulang page: category2 */
:root {
            --color-primary: #0B342B;
            --color-primary-dark: #103D33;
            --color-primary-deep: #082920;
            --color-accent: #C9A24B;
            --color-accent-light: #D4AF37;
            --color-accent-soft: #E8D5A3;
            --color-bg: #F7F5F0;
            --color-bg-alt: #EEF2EE;
            --color-text: #1F2A26;
            --color-text-secondary: #5D6A64;
            --color-text-light: #8A9993;
            --color-white: #FFFFFF;
            --color-border: rgba(11, 52, 43, 0.08);
            --color-border-strong: rgba(11, 52, 43, 0.16);
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", sans-serif;
            --font-numeric: "Inter", "Roboto", "PingFang SC", sans-serif;
            --radius-card: 14px;
            --radius-btn: 8px;
            --radius-pill: 999px;
            --shadow-card: 0 4px 16px rgba(11, 52, 43, 0.06);
            --shadow-hover: 0 10px 24px rgba(11, 52, 43, 0.12);
            --shadow-deep: 0 16px 40px rgba(11, 52, 43, 0.18);
            --transition: 0.25s ease;
            --max-width: 1200px;
            --header-height: 68px;
            --section-pad: 72px;
            --section-pad-mobile: 44px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            color: var(--color-text);
            background: var(--color-bg);
            line-height: 1.8;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition), background-color var(--transition), border-color var(--transition), opacity var(--transition);
        }

        button {
            font-family: var(--font-sans);
            cursor: pointer;
            border: none;
            background: none;
            font-size: inherit;
            transition: background-color var(--transition), color var(--transition), border-color var(--transition), box-shadow var(--transition), transform var(--transition);
        }

        input,
        select,
        textarea {
            font-family: var(--font-sans);
            font-size: 15px;
            color: var(--color-text);
            border-radius: 8px;
            border: 1px solid #D9E0DB;
            background: var(--color-white);
            padding: 10px 14px;
            outline: none;
            transition: border-color var(--transition), box-shadow var(--transition);
        }

        input:focus,
        select:focus,
        textarea:focus {
            border-color: var(--color-accent);
            box-shadow: 0 0 0 3px rgba(201, 162, 75, 0.12);
        }

        input::placeholder,
        textarea::placeholder {
            color: #9AA8A2;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 28px;
        }

        /* Header / Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--color-primary-deep);
            height: var(--header-height);
            display: flex;
            align-items: center;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.18);
            border-bottom: 1px solid rgba(201, 162, 75, 0.2);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .logo {
            display: flex;
            align-items: baseline;
            gap: 4px;
            font-weight: 700;
            font-size: 22px;
            color: var(--color-white);
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }

        .logo .logo-mark {
            color: var(--color-accent);
            font-size: 24px;
            margin-right: 2px;
        }

        .logo .logo-sub {
            font-size: 14px;
            font-weight: 400;
            color: rgba(255, 255, 255, 0.65);
            margin-left: 8px;
            letter-spacing: 0.3px;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .main-nav a {
            color: rgba(255, 255, 255, 0.78);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 6px;
            letter-spacing: 0.3px;
            position: relative;
            white-space: nowrap;
        }

        .main-nav a:hover {
            color: var(--color-white);
            background: rgba(255, 255, 255, 0.08);
        }

        .main-nav a.active {
            color: var(--color-accent);
        }

        .main-nav a.active::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 28px;
            height: 2px;
            background: var(--color-accent);
            border-radius: 2px;
        }

        .nav-cta {
            background: var(--color-accent);
            color: var(--color-primary-deep);
            font-weight: 600;
            font-size: 14px;
            padding: 9px 20px;
            border-radius: 6px;
            letter-spacing: 0.4px;
            margin-left: 12px;
            flex-shrink: 0;
        }

        .nav-cta:hover {
            background: var(--color-accent-light);
            color: var(--color-primary-deep);
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--color-white);
            font-size: 26px;
            padding: 4px 8px;
            line-height: 1;
            margin-left: auto;
        }

        /* Breadcrumb */
        .breadcrumb-section {
            background: var(--color-bg-alt);
            padding: 16px 0;
            border-bottom: 1px solid var(--color-border);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            font-size: 14px;
            color: var(--color-text-secondary);
            flex-wrap: wrap;
            gap: 6px;
        }

        .breadcrumb a {
            color: var(--color-primary);
            font-weight: 500;
        }

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

        .breadcrumb .separator {
            color: var(--color-text-light);
            margin: 0 4px;
        }

        .breadcrumb .current {
            color: var(--color-text-secondary);
            font-weight: 400;
        }

        /* Section common */
        .section {
            padding: var(--section-pad) 0;
        }

        .section-alt {
            background: var(--color-bg-alt);
        }

        .section-dark {
            background: var(--color-primary-dark);
            color: var(--color-white);
        }

        .section-header {
            margin-bottom: 36px;
        }

        .section-header .section-tag {
            display: inline-block;
            padding: 4px 14px;
            background: var(--color-accent-soft);
            color: var(--color-primary-dark);
            font-size: 13px;
            font-weight: 600;
            border-radius: var(--radius-pill);
            letter-spacing: 0.8px;
            margin-bottom: 10px;
        }

        .section-header h2 {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.3;
            color: inherit;
            margin-bottom: 10px;
        }

        .section-header p {
            color: var(--color-text-secondary);
            font-size: 16px;
            max-width: 720px;
        }

        .section-dark .section-header p {
            color: rgba(255, 255, 255, 0.75);
        }

        .section-dark .section-header h2 {
            color: var(--color-white);
        }

        .section-dark .section-header .section-tag {
            background: rgba(201, 162, 75, 0.25);
            color: var(--color-accent-soft);
        }

        /* Hero */
        .page-hero {
            background: linear-gradient(135deg, var(--color-primary-deep) 0%, var(--color-primary-dark) 60%, #1a4a3a 100%);
            color: var(--color-white);
            padding: 56px 0 64px;
            position: relative;
            overflow: hidden;
        }

        .page-hero::after {
            content: "";
            position: absolute;
            right: -80px;
            top: -80px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(201, 162, 75, 0.18) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .page-hero .container {
            position: relative;
            z-index: 1;
        }

        .page-hero h1 {
            font-size: 38px;
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 14px;
            letter-spacing: 1px;
        }

        .page-hero h1 .accent {
            color: var(--color-accent);
        }

        .page-hero p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.75);
            max-width: 660px;
            line-height: 1.9;
        }

        .hero-image-wrapper {
            margin-top: 28px;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-deep);
            max-width: 720px;
        }

        .hero-image-wrapper img {
            width: 100%;
            height: 280px;
            object-fit: cover;
        }

        /* Metrics grid */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .metric-card {
            background: var(--color-white);
            border-radius: var(--radius-card);
            padding: 24px 20px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            transition: all var(--transition);
        }

        .metric-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--color-border-strong);
        }

        .metric-card .metric-icon {
            font-size: 26px;
            color: var(--color-accent);
            margin-bottom: 12px;
        }

        .metric-card .metric-value {
            font-family: var(--font-numeric);
            font-size: 36px;
            font-weight: 700;
            color: var(--color-primary);
            line-height: 1.2;
            letter-spacing: -0.5px;
        }

        .metric-card .metric-value small {
            font-size: 18px;
            font-weight: 600;
            color: var(--color-text-secondary);
        }

        .metric-card .metric-label {
            font-size: 14px;
            color: var(--color-text-secondary);
            font-weight: 500;
            margin-top: 6px;
        }

        .metric-card .metric-change {
            display: inline-block;
            margin-top: 10px;
            padding: 3px 10px;
            border-radius: var(--radius-pill);
            font-size: 12px;
            font-weight: 600;
            background: #E4EFE9;
            color: var(--color-primary);
        }

        .metric-card .metric-change.up {
            background: #E4EFE9;
            color: #1a6b45;
        }

        /* Data update notice */
        .update-notice {
            background: var(--color-white);
            border-radius: var(--radius-card);
            padding: 28px 30px;
            border-left: 4px solid var(--color-accent);
            box-shadow: var(--shadow-card);
            display: flex;
            flex-wrap: wrap;
            align-items: flex-start;
            gap: 20px;
        }

        .update-notice .notice-icon {
            font-size: 32px;
            color: var(--color-accent);
            flex-shrink: 0;
        }

        .update-notice .notice-content h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--color-primary);
        }

        .update-notice .notice-content p {
            color: var(--color-text-secondary);
            font-size: 15px;
        }

        .update-notice .notice-meta {
            display: flex;
            gap: 16px;
            margin-top: 12px;
            flex-wrap: wrap;
        }

        .update-notice .notice-meta span {
            font-size: 13px;
            color: var(--color-text-light);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* Data dimension nav */
        .dimension-nav {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 24px;
        }

        .dimension-nav a {
            padding: 8px 18px;
            border-radius: var(--radius-pill);
            background: var(--color-white);
            border: 1px solid var(--color-border-strong);
            color: var(--color-text);
            font-size: 14px;
            font-weight: 500;
            transition: all var(--transition);
        }

        .dimension-nav a:hover,
        .dimension-nav a.active {
            background: var(--color-primary);
            color: var(--color-white);
            border-color: var(--color-primary);
        }

        /* Comparison table */
        .comparison-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }

        .comparison-card {
            background: var(--color-white);
            border-radius: var(--radius-card);
            padding: 26px 24px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
        }

        .comparison-card.highlight {
            border-color: var(--color-accent);
            box-shadow: 0 8px 28px rgba(201, 162, 75, 0.18);
        }

        .comparison-card .comparison-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .comparison-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 10px 0;
            border-bottom: 1px solid var(--color-border);
        }

        .comparison-item:last-child {
            border-bottom: none;
        }

        .comparison-item .item-label {
            font-size: 14px;
            color: var(--color-text-secondary);
        }

        .comparison-item .item-value {
            font-family: var(--font-numeric);
            font-size: 16px;
            font-weight: 700;
            color: var(--color-primary);
        }

        .comparison-item .item-diff {
            display: inline-block;
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 12px;
            font-weight: 600;
            background: #E8D5A3;
            color: var(--color-primary-dark);
        }

        /* Form */
        .data-form-section {
            background: var(--color-bg-alt);
            border-radius: var(--radius-card);
            padding: 36px;
            border: 1px solid var(--color-border);
        }

        .data-form-section .form-title {
            font-size: 24px;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 12px;
        }

        .data-form-section .form-desc {
            color: var(--color-text-secondary);
            margin-bottom: 24px;
            font-size: 15px;
        }

        .form-row {
            display: flex;
            flex-direction: column;
            gap: 6px;
            margin-bottom: 16px;
        }

        .form-row label {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text);
        }

        .form-row input,
        .form-row select {
            width: 100%;
            height: 44px;
        }

        .form-submit {
            background: var(--color-accent);
            color: var(--color-primary-deep);
            padding: 12px 28px;
            font-size: 16px;
            font-weight: 700;
            border-radius: 8px;
            letter-spacing: 0.5px;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            width: 100%;
        }

        .form-submit:hover {
            background: var(--color-accent-light);
            box-shadow: 0 8px 20px rgba(201, 162, 75, 0.25);
        }

        .form-submit:focus {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }

        .form-success {
            display: none;
            background: #E4EFE9;
            color: #1a6b45;
            padding: 14px 18px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 15px;
            margin-top: 16px;
            border: 1px solid #b8d8c5;
        }

        .form-success.show {
            display: block;
        }

        /* Data trend list */
        .trend-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }

        .trend-item {
            background: var(--color-white);
            border-radius: 10px;
            padding: 16px 18px;
            display: flex;
            align-items: center;
            gap: 14px;
            border: 1px solid var(--color-border);
            transition: all var(--transition);
        }

        .trend-item:hover {
            box-shadow: var(--shadow-card);
            border-color: var(--color-border-strong);
        }

        .trend-item .trend-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: #E4EFE9;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--color-primary);
            flex-shrink: 0;
        }

        .trend-item .trend-info {
            flex: 1;
        }

        .trend-item .trend-name {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text);
        }

        .trend-item .trend-meta {
            font-size: 13px;
            color: var(--color-text-light);
            margin-top: 2px;
        }

        .trend-item .trend-value {
            font-family: var(--font-numeric);
            font-size: 20px;
            font-weight: 700;
            color: var(--color-accent);
        }

        /* Footer */
        .site-footer {
            background: var(--color-primary-deep);
            color: rgba(255, 255, 255, 0.75);
            padding: 40px 0 24px;
            margin-top: 0;
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 28px;
        }

        .site-footer .footer-brand h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 10px;
            letter-spacing: 0.5px;
        }

        .site-footer .footer-brand h3 .accent {
            color: var(--color-accent);
        }

        .site-footer .footer-brand p {
            font-size: 14px;
            line-height: 1.9;
            color: rgba(255, 255, 255, 0.65);
            max-width: 360px;
        }

        .site-footer .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-white);
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }

        .site-footer .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.65);
            font-size: 14px;
            padding: 4px 0;
            transition: color var(--transition);
        }

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

        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 18px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.55);
        }

        .site-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.55);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

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

        .site-footer .footer-bottom .sep {
            margin: 0 6px;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .trend-list {
                grid-template-columns: 1fr;
            }
            .comparison-wrapper {
                grid-template-columns: 1fr;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 60px;
                --section-pad: 44px;
                --section-pad-mobile: 32px;
            }

            .container {
                padding: 0 18px;
            }

            .nav-cta {
                display: none;
            }

            .nav-toggle {
                display: block;
            }

            .main-nav {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--color-primary-deep);
                flex-direction: column;
                align-items: stretch;
                padding: 16px 20px;
                gap: 6px;
                box-shadow: 0 12px 24px rgba(0, 0, 0, 0.25);
                border-top: 1px solid rgba(201, 162, 75, 0.15);
            }

            .main-nav.open {
                display: flex;
            }

            .main-nav a {
                padding: 12px 16px;
                border-radius: 8px;
                font-size: 16px;
                text-align: left;
            }

            .main-nav a.active::after {
                display: none;
            }

            .main-nav a.active {
                background: rgba(201, 162, 75, 0.15);
            }

            .page-hero h1 {
                font-size: 28px;
            }

            .page-hero p {
                font-size: 15px;
            }

            .metrics-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }

            .metric-card {
                padding: 18px 16px;
            }

            .metric-card .metric-value {
                font-size: 28px;
            }

            .section-header h2 {
                font-size: 23px;
            }

            .update-notice {
                padding: 20px 16px;
                flex-direction: column;
                gap: 12px;
            }

            .hero-image-wrapper img {
                height: 180px;
            }

            .data-form-section {
                padding: 24px 16px;
            }

            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .page-hero h1 {
                font-size: 24px;
            }

            .metric-card .metric-value {
                font-size: 24px;
            }

            .breadcrumb {
                font-size: 13px;
            }

            .dimension-nav {
                gap: 6px;
            }

            .dimension-nav a {
                padding: 6px 12px;
                font-size: 12px;
            }
        }

/* roulang page: category3 */
:root {
 --color-primary: #0B342B;
 --color-primary-dark: #103D33;
 --color-primary-deep: #082920;
 --color-accent: #C9A24B;
 --color-accent-light: #D4AF37;
 --color-accent-soft: #E8D5A3;
 --color-bg: #F7F5F0;
 --color-bg-alt: #EEF2EE;
 --color-text: #1F2A26;
 --color-text-secondary: #5D6A64;
 --color-text-light: #8A9993;
 --color-white: #FFFFFF;
 --color-border: rgba(11, 52, 43, 0.08);
 --color-border-strong: rgba(11, 52, 43, 0.16);
 --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", sans-serif;
 --font-numeric: "Inter", "Roboto", "PingFang SC", sans-serif;
 --radius-card: 14px;
 --radius-btn: 8px;
 --radius-pill: 999px;
 --shadow-card: 0 4px 16px rgba(11, 52, 43, 0.06);
 --shadow-hover: 0 10px 24px rgba(11, 52, 43, 0.12);
 --shadow-deep: 0 16px 40px rgba(11, 52, 43, 0.18);
 --transition: 0.25s ease;
 --max-width: 1200px;
 --header-height: 68px;
 --section-pad: 72px;
 --section-pad-mobile: 44px;
}

html {
 scroll-behavior: smooth;
 -webkit-font-smoothing: antialiased;
 -moz-osx-font-smoothing: grayscale;
 font-size: 16px;
}

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

body {
 font-family: var(--font-sans);
 color: var(--color-text);
 background: var(--color-bg);
 line-height: 1.8;
 overflow-x: hidden;
}

img {
 max-width: 100%;
 height: auto;
 display: block;
 border: 0;
}

a {
 text-decoration: none;
 color: inherit;
 transition: color var(--transition), background-color var(--transition), border-color var(--transition), opacity var(--transition);
}

button {
 font-family: var(--font-sans);
 cursor: pointer;
 border: none;
 background: none;
 font-size: inherit;
 transition: background-color var(--transition), color var(--transition), border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

input,
select,
textarea {
 font-family: var(--font-sans);
 font-size: 15px;
 color: var(--color-text);
 border-radius: 8px;
 border: 1px solid #D9E0DB;
 background: var(--color-white);
 padding: 10px 14px;
 outline: none;
 transition: border-color var(--transition), box-shadow var(--transition);
 width: 100%;
}

input:focus,
select:focus,
textarea:focus {
 border-color: var(--color-accent);
 box-shadow: 0 0 0 3px rgba(201, 162, 75, 0.12);
}

input::placeholder,
textarea::placeholder {
 color: #9AA8A2;
}

.container {
 max-width: var(--max-width);
 margin: 0 auto;
 padding: 0 28px;
}

/* ========== Header / Navigation ========== */
.site-header {
 position: sticky;
 top: 0;
 z-index: 100;
 background: var(--color-primary-deep);
 height: var(--header-height);
 display: flex;
 align-items: center;
 box-shadow: 0 2px 12px rgba(0, 0, 0, 0.18);
 border-bottom: 1px solid rgba(201, 162, 75, 0.2);
}

.site-header .container {
 display: flex;
 align-items: center;
 justify-content: space-between;
 width: 100%;
}

.logo {
 display: flex;
 align-items: baseline;
 gap: 4px;
 font-weight: 700;
 font-size: 22px;
 color: var(--color-white);
 letter-spacing: 0.5px;
 flex-shrink: 0;
}

.logo .logo-mark {
 color: var(--color-accent);
 font-size: 24px;
 margin-right: 2px;
}

.logo .logo-sub {
 font-size: 14px;
 font-weight: 400;
 color: rgba(255, 255, 255, 0.65);
 margin-left: 8px;
 letter-spacing: 0.3px;
}

.main-nav {
 display: flex;
 align-items: center;
 gap: 4px;
}

.main-nav a {
 color: rgba(255, 255, 255, 0.78);
 font-size: 15px;
 font-weight: 500;
 padding: 8px 16px;
 border-radius: 6px;
 letter-spacing: 0.3px;
 position: relative;
}

.main-nav a:hover {
 color: var(--color-white);
 background: rgba(255, 255, 255, 0.08);
}

.main-nav a.active {
 color: var(--color-accent);
}

.main-nav a.active::after {
 content: "";
 position: absolute;
 bottom: 0;
 left: 50%;
 transform: translateX(-50%);
 width: 28px;
 height: 2px;
 background: var(--color-accent);
 border-radius: 2px;
}

.nav-cta {
 background: var(--color-accent);
 color: var(--color-primary-deep);
 font-weight: 600;
 font-size: 14px;
 padding: 9px 20px;
 border-radius: 6px;
 letter-spacing: 0.4px;
 margin-left: 12px;
 flex-shrink: 0;
}

.nav-cta:hover {
 background: var(--color-accent-light);
 color: var(--color-primary-deep);
}

.nav-toggle {
 display: none;
 flex-direction: column;
 gap: 5px;
 background: none;
 border: none;
 padding: 8px;
}

.nav-toggle span {
 width: 24px;
 height: 2px;
 background: var(--color-white);
 border-radius: 2px;
 transition: transform var(--transition), opacity var(--transition);
}

/* ========== Breadcrumb ========== */
.breadcrumb-wrap {
 background: var(--color-bg-alt);
 border-bottom: 1px solid var(--color-border);
 padding: 12px 0;
}

.breadcrumb {
 display: flex;
 align-items: center;
 gap: 8px;
 font-size: 14px;
 color: var(--color-text-secondary);
 flex-wrap: wrap;
}

.breadcrumb a {
 color: var(--color-primary);
 font-weight: 500;
}

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

.breadcrumb .separator {
 color: var(--color-text-light);
}

.breadcrumb .current {
 color: var(--color-text-secondary);
}

/* ========== Category Hero ========== */
.category-hero {
 background: var(--color-primary-deep);
 color: var(--color-white);
 padding: 64px 0 72px;
 position: relative;
 overflow: hidden;
 border-bottom: 1px solid rgba(201, 162, 75, 0.2);
}

.category-hero::before {
 content: "";
 position: absolute;
 top: 0;
 right: 0;
 width: 55%;
 height: 100%;
 background: url('/assets/images/e69ff72c69f725d6.webp') center/cover no-repeat;
 opacity: 0.18;
 z-index: 0;
}

.category-hero::after {
 content: "";
 position: absolute;
 inset: 0;
 background: linear-gradient(135deg, rgba(8, 41, 32, 0.92) 35%, rgba(8, 41, 32, 0.55) 100%);
 z-index: 1;
}

.category-hero .container {
 position: relative;
 z-index: 2;
 display: grid;
 grid-template-columns: 1fr auto;
 gap: 48px;
 align-items: center;
}

.category-hero-content h1 {
 font-size: 40px;
 font-weight: 700;
 line-height: 1.25;
 letter-spacing: 0.5px;
 margin-bottom: 16px;
 color: var(--color-white);
}

.category-hero-content h1 .highlight {
 color: var(--color-accent);
}

.category-hero-content p {
 font-size: 17px;
 color: rgba(255, 255, 255, 0.78);
 line-height: 1.9;
 max-width: 640px;
}

.category-hero-stats {
 display: flex;
 gap: 28px;
 flex-shrink: 0;
}

.category-hero-stats .stat-item {
 text-align: center;
 background: rgba(255, 255, 255, 0.06);
 border: 1px solid rgba(201, 162, 75, 0.25);
 border-radius: var(--radius-card);
 padding: 20px 24px;
 min-width: 120px;
}

.category-hero-stats .stat-num {
 font-size: 32px;
 font-weight: 700;
 font-family: var(--font-numeric);
 color: var(--color-accent);
 line-height: 1.2;
 display: block;
}

.category-hero-stats .stat-label {
 font-size: 13px;
 color: rgba(255, 255, 255, 0.65);
 margin-top: 6px;
 display: block;
}

/* ========== Section Common ========== */
.section {
 padding: var(--section-pad) 0;
}

.section-alt {
 background: var(--color-bg-alt);
}

.section-deep {
 background: var(--color-primary-deep);
 color: var(--color-white);
}

.section-head {
 margin-bottom: 40px;
}

.section-head h2 {
 font-size: 30px;
 font-weight: 600;
 line-height: 1.3;
 color: var(--color-primary);
 margin-bottom: 10px;
}

.section-deep .section-head h2 {
 color: var(--color-white);
}

.section-head .section-desc {
 font-size: 16px;
 color: var(--color-text-secondary);
 max-width: 680px;
 line-height: 1.9;
}

.section-deep .section-head .section-desc {
 color: rgba(255, 255, 255, 0.7);
}

/* ========== Topic List ========== */
.topic-list {
 display: flex;
 flex-direction: column;
 gap: 16px;
}

.topic-card {
 background: var(--color-white);
 border: 1px solid var(--color-border);
 border-radius: var(--radius-card);
 box-shadow: var(--shadow-card);
 padding: 20px 24px;
 display: grid;
 grid-template-columns: 72px 1fr auto;
 gap: 20px;
 align-items: center;
 transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}

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

.topic-card .topic-avatar {
 width: 56px;
 height: 56px;
 border-radius: 50%;
 background: var(--color-primary);
 color: var(--color-accent);
 font-weight: 700;
 font-size: 20px;
 display: flex;
 align-items: center;
 justify-content: center;
 letter-spacing: 1px;
 flex-shrink: 0;
}

.topic-card:nth-child(2) .topic-avatar {
 background: #2A4A3E;
 color: #E8D5A3;
}

.topic-card:nth-child(3) .topic-avatar {
 background: #3A5A4E;
 color: #D4AF37;
}

.topic-card:nth-child(4) .topic-avatar {
 background: #1D4036;
 color: #C9A24B;
}

.topic-card:nth-child(5) .topic-avatar {
 background: #153B31;
 color: #E8D5A3;
}

.topic-card:nth-child(6) .topic-avatar {
 background: #254A3E;
 color: #D4AF37;
}

.topic-card .topic-main {
 min-width: 0;
}

.topic-card .topic-title {
 font-size: 17px;
 font-weight: 600;
 color: var(--color-primary);
 margin-bottom: 6px;
 line-height: 1.5;
}

.topic-card .topic-meta {
 display: flex;
 align-items: center;
 gap: 16px;
 flex-wrap: wrap;
 font-size: 13px;
 color: var(--color-text-secondary);
}

.topic-card .topic-meta .author {
 font-weight: 500;
 color: var(--color-primary);
}

.topic-card .topic-meta .reply-count {
 display: inline-flex;
 align-items: center;
 gap: 4px;
 color: var(--color-text-secondary);
}

.topic-card .topic-meta .time {
 color: var(--color-text-light);
}

.topic-card .topic-badge {
 display: inline-flex;
 align-items: center;
 padding: 4px 14px;
 border-radius: var(--radius-pill);
 font-size: 12px;
 font-weight: 600;
 letter-spacing: 0.4px;
 flex-shrink: 0;
 white-space: nowrap;
}

.badge-hot {
 background: #FDE8E8;
 color: #C0392B;
}

.badge-trending {
 background: #FFF3D6;
 color: #B8860B;
}

.badge-new {
 background: #E4EFE9;
 color: var(--color-primary);
}

.badge-active {
 background: #E8F0FE;
 color: #2C5282;
}

.topic-list-footer {
 margin-top: 28px;
 text-align: center;
}

/* ========== Hot Tags ========== */
.hot-tags-wrap {
 display: flex;
 flex-wrap: wrap;
 gap: 10px;
 margin-top: 20px;
}

.hot-tag {
 display: inline-flex;
 align-items: center;
 padding: 8px 18px;
 border-radius: var(--radius-pill);
 background: var(--color-white);
 border: 1px solid var(--color-border);
 font-size: 14px;
 font-weight: 500;
 color: var(--color-text-secondary);
 transition: all var(--transition);
 cursor: pointer;
}

.hot-tag:hover {
 border-color: var(--color-accent);
 color: var(--color-accent);
 background: rgba(201, 162, 75, 0.06);
}

.hot-tag .tag-count {
 margin-left: 6px;
 font-size: 12px;
 font-weight: 400;
 color: var(--color-text-light);
}

/* ========== Community Rules ========== */
.rules-grid {
 display: grid;
 grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
 gap: 20px;
}

.rule-card {
 background: var(--color-white);
 border: 1px solid var(--color-border);
 border-radius: var(--radius-card);
 padding: 24px;
 box-shadow: var(--shadow-card);
 transition: box-shadow var(--transition), transform var(--transition);
}

.rule-card:hover {
 box-shadow: var(--shadow-hover);
 transform: translateY(-3px);
}

.rule-card .rule-icon {
 width: 44px;
 height: 44px;
 border-radius: 10px;
 background: rgba(201, 162, 75, 0.12);
 color: var(--color-accent);
 display: flex;
 align-items: center;
 justify-content: center;
 font-size: 20px;
 font-weight: 700;
 margin-bottom: 14px;
}

.rule-card h3 {
 font-size: 17px;
 font-weight: 600;
 color: var(--color-primary);
 margin-bottom: 8px;
}

.rule-card p {
 font-size: 14px;
 color: var(--color-text-secondary);
 line-height: 1.8;
}

/* ========== Fan Ranking ========== */
.ranking-list {
 display: flex;
 flex-direction: column;
 gap: 12px;
 max-width: 720px;
}

.ranking-item {
 background: var(--color-white);
 border: 1px solid var(--color-border);
 border-radius: var(--radius-card);
 padding: 14px 20px;
 display: flex;
 align-items: center;
 gap: 16px;
 box-shadow: var(--shadow-card);
 transition: all var(--transition);
}

.ranking-item:hover {
 box-shadow: var(--shadow-hover);
 transform: translateX(4px);
 border-color: var(--color-border-strong);
}

.ranking-item .rank-num {
 width: 36px;
 height: 36px;
 border-radius: 50%;
 background: var(--color-bg-alt);
 display: flex;
 align-items: center;
 justify-content: center;
 font-weight: 700;
 font-size: 16px;
 color: var(--color-text-secondary);
 flex-shrink: 0;
}

.ranking-item:nth-child(1) .rank-num {
 background: var(--color-accent);
 color: var(--color-primary-deep);
}

.ranking-item:nth-child(2) .rank-num {
 background: #D4D4D4;
 color: #333;
}

.ranking-item:nth-child(3) .rank-num {
 background: #CD9B6B;
 color: #4A2E1A;
}

.ranking-item .rank-avatar {
 width: 40px;
 height: 40px;
 border-radius: 50%;
 background: var(--color-primary);
 color: var(--color-accent);
 font-weight: 600;
 font-size: 15px;
 display: flex;
 align-items: center;
 justify-content: center;
 flex-shrink: 0;
}

.ranking-item:nth-child(2) .rank-avatar { background: #2A4A3E; color: #E8D5A3; }
.ranking-item:nth-child(3) .rank-avatar { background: #3A5A4E; color: #D4AF37; }
.ranking-item:nth-child(4) .rank-avatar { background: #1D4036; color: #C9A24B; }
.ranking-item:nth-child(5) .rank-avatar { background: #153B31; color: #E8D5A3; }

.ranking-item .rank-info {
 flex: 1;
 min-width: 0;
}

.ranking-item .rank-name {
 font-weight: 600;
 font-size: 15px;
 color: var(--color-primary);
}

.ranking-item .rank-level {
 font-size: 13px;
 color: var(--color-text-secondary);
}

.ranking-item .rank-score {
 display: flex;
 flex-direction: column;
 align-items: flex-end;
 flex-shrink: 0;
}

.ranking-item .rank-score .score-num {
 font-weight: 700;
 font-size: 18px;
 font-family: var(--font-numeric);
 color: var(--color-primary);
}

.ranking-item .rank-score .score-label {
 font-size: 12px;
 color: var(--color-text-light);
}

/* ========== Publish Form ========== */
.publish-panel {
 background: var(--color-primary-deep);
 border-radius: var(--radius-card);
 padding: 48px 56px;
 color: var(--color-white);
 display: grid;
 grid-template-columns: 1fr 1fr;
 gap: 48px;
 align-items: center;
 position: relative;
 overflow: hidden;
}

.publish-panel::before {
 content: "";
 position: absolute;
 top: 0;
 right: 0;
 width: 45%;
 height: 100%;
 background: url('/assets/images/31594e29ad31798b.webp') center/cover no-repeat;
 opacity: 0.12;
 z-index: 0;
}

.publish-panel > * {
 position: relative;
 z-index: 1;
}

.publish-panel .publish-info h2 {
 font-size: 28px;
 font-weight: 600;
 color: var(--color-white);
 margin-bottom: 12px;
 line-height: 1.3;
}

.publish-panel .publish-info h2 .highlight {
 color: var(--color-accent);
}

.publish-panel .publish-info p {
 font-size: 15px;
 color: rgba(255, 255, 255, 0.72);
 line-height: 1.9;
}

.publish-form .form-group {
 margin-bottom: 16px;
}

.publish-form label {
 display: block;
 font-size: 14px;
 font-weight: 500;
 color: rgba(255, 255, 255, 0.85);
 margin-bottom: 6px;
}

.publish-form input,
.publish-form select,
.publish-form textarea {
 background: rgba(255, 255, 255, 0.08);
 border-color: rgba(255, 255, 255, 0.2);
 color: var(--color-white);
}

.publish-form input::placeholder,
.publish-form textarea::placeholder {
 color: rgba(255, 255, 255, 0.4);
}

.publish-form input:focus,
.publish-form select:focus,
.publish-form textarea:focus {
 border-color: var(--color-accent);
 background: rgba(255, 255, 255, 0.12);
 box-shadow: 0 0 0 3px rgba(201, 162, 75, 0.15);
}

.publish-form select option {
 background: var(--color-primary-deep);
 color: var(--color-white);
}

.publish-form .form-submit {
 background: var(--color-accent);
 color: var(--color-primary-deep);
 font-weight: 600;
 font-size: 16px;
 padding: 12px 32px;
 border-radius: var(--radius-btn);
 letter-spacing: 0.4px;
 transition: background-color var(--transition), transform var(--transition);
}

.publish-form .form-submit:hover {
 background: var(--color-accent-light);
 transform: translateY(-1px);
}

.publish-form .form-submit:focus {
 outline: 3px solid rgba(201, 162, 75, 0.3);
}

/* ========== Discussion Highlights ========== */
.discussion-grid {
 display: grid;
 grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
 gap: 20px;
}

.discussion-card {
 background: var(--color-white);
 border: 1px solid var(--color-border);
 border-radius: var(--radius-card);
 padding: 24px;
 box-shadow: var(--shadow-card);
 transition: all var(--transition);
}

.discussion-card:hover {
 box-shadow: var(--shadow-hover);
 transform: translateY(-3px);
}

.discussion-card .discussion-quote {
 font-size: 15px;
 color: var(--color-text);
 line-height: 1.9;
 margin-bottom: 16px;
 padding-left: 16px;
 border-left: 3px solid var(--color-accent);
}

.discussion-card .discussion-author {
 display: flex;
 align-items: center;
 gap: 12px;
}

.discussion-card .discussion-avatar {
 width: 36px;
 height: 36px;
 border-radius: 50%;
 background: var(--color-primary);
 color: var(--color-accent);
 font-weight: 600;
 font-size: 14px;
 display: flex;
 align-items: center;
 justify-content: center;
 flex-shrink: 0;
}

.discussion-card .discussion-name {
 font-size: 14px;
 font-weight: 600;
 color: var(--color-primary);
}

.discussion-card .discussion-time {
 font-size: 12px;
 color: var(--color-text-light);
}

/* ========== Footer ========== */
.site-footer {
 background: var(--color-primary-deep);
 color: rgba(255, 255, 255, 0.7);
 padding: 56px 0 0;
 border-top: 1px solid rgba(201, 162, 75, 0.2);
}

.site-footer .footer-grid {
 display: grid;
 grid-template-columns: 2fr 1fr 1.5fr;
 gap: 40px;
 padding-bottom: 40px;
 border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.site-footer .footer-brand h3 {
 font-size: 22px;
 font-weight: 700;
 color: var(--color-white);
 margin-bottom: 12px;
 letter-spacing: 0.5px;
}

.site-footer .footer-brand h3 .accent {
 color: var(--color-accent);
}

.site-footer .footer-brand p {
 font-size: 14px;
 line-height: 1.9;
 color: rgba(255, 255, 255, 0.6);
 max-width: 320px;
}

.site-footer .footer-title {
 font-size: 16px;
 font-weight: 600;
 color: var(--color-white);
 margin-bottom: 16px;
}

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

.site-footer .footer-links a {
 font-size: 14px;
 color: rgba(255, 255, 255, 0.6);
 transition: color var(--transition);
}

.site-footer .footer-links a:hover {
 color: var(--color-accent);
}

.site-footer .footer-bottom {
 padding: 20px 0;
 display: flex;
 flex-direction: column;
 gap: 8px;
 align-items: center;
 text-align: center;
 font-size: 13px;
 color: rgba(255, 255, 255, 0.45);
}

.site-footer .footer-bottom a {
 color: rgba(255, 255, 255, 0.5);
}

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

.site-footer .footer-bottom .footer-meta {
 display: flex;
 gap: 16px;
 flex-wrap: wrap;
 justify-content: center;
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
 .category-hero .container {
  grid-template-columns: 1fr;
  gap: 32px;
 }
 .category-hero-stats {
  justify-content: flex-start;
 }
 .publish-panel {
  grid-template-columns: 1fr;
  padding: 36px 32px;
 }
 .topic-card {
  grid-template-columns: 56px 1fr;
  gap: 14px;
 }
 .topic-card .topic-badge {
  grid-column: 2;
  justify-self: start;
 }
 .site-footer .footer-grid {
  grid-template-columns: 1fr 1fr;
  gap: 32px;
 }
}

@media (max-width: 768px) {
 :root {
  --header-height: 60px;
  --section-pad: 44px;
 }
 .container {
  padding: 0 16px;
 }
 .main-nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  background: var(--color-primary-deep);
  flex-direction: column;
  padding: 12px 20px;
  gap: 2px;
  border-top: 1px solid rgba(201, 162, 75, 0.15);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
 }
 .main-nav.open {
  display: flex;
 }
 .main-nav a {
  padding: 12px 16px;
  font-size: 16px;
  width: 100%;
 }
 .main-nav a.active::after {
  display: none;
 }
 .nav-cta {
  margin-left: 0;
  text-align: center;
  padding: 10px 20px;
 }
 .nav-toggle {
  display: flex;
 }
 .category-hero {
  padding: 44px 0 52px;
 }
 .category-hero-content h1 {
  font-size: 28px;
 }
 .category-hero-stats {
  flex-wrap: wrap;
  gap: 12px;
 }
 .category-hero-stats .stat-item {
  min-width: 88px;
  padding: 14px 16px;
 }
 .category-hero-stats .stat-num {
  font-size: 24px;
 }
 .section-head h2 {
  font-size: 24px;
 }
 .topic-card {
  padding: 16px;
  grid-template-columns: 48px 1fr;
  gap: 12px;
 }
 .topic-card .topic-avatar {
  width: 44px;
  height: 44px;
  font-size: 16px;
 }
 .topic-card .topic-title {
  font-size: 15px;
 }
 .topic-card .topic-badge {
  grid-column: 2;
  justify-self: start;
  margin-top: 4px;
 }
 .publish-panel {
  padding: 28px 20px;
  border-radius: 12px;
 }
 .publish-panel .publish-info h2 {
  font-size: 22px;
 }
 .site-footer .footer-grid {
  grid-template-columns: 1fr;
  gap: 24px;
 }
 .site-footer {
  padding-top: 40px;
 }
 .site-footer .footer-bottom .footer-meta {
  gap: 10px;
 }
}

@media (max-width: 520px) {
 .category-hero-content h1 {
  font-size: 24px;
 }
 .category-hero-content p {
  font-size: 15px;
 }
 .category-hero-stats .stat-item {
  min-width: 72px;
  padding: 10px 12px;
 }
 .category-hero-stats .stat-num {
  font-size: 20px;
 }
 .section-head h2 {
  font-size: 22px;
 }
 .rules-grid {
  grid-template-columns: 1fr;
 }
 .discussion-grid {
  grid-template-columns: 1fr;
 }
 .topic-card .topic-meta {
  gap: 8px;
  font-size: 12px;
 }
 .ranking-item {
  padding: 12px 14px;
  gap: 10px;
 }
}

/* roulang page: category4 */
:root {
            --color-primary: #0B342B;
            --color-primary-dark: #103D33;
            --color-primary-deep: #082920;
            --color-accent: #C9A24B;
            --color-accent-light: #D4AF37;
            --color-accent-soft: #E8D5A3;
            --color-bg: #F7F5F0;
            --color-bg-alt: #EEF2EE;
            --color-text: #1F2A26;
            --color-text-secondary: #5D6A64;
            --color-text-light: #8A9993;
            --color-white: #FFFFFF;
            --color-border: rgba(11, 52, 43, 0.08);
            --color-border-strong: rgba(11, 52, 43, 0.16);
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", sans-serif;
            --font-numeric: "Inter", "Roboto", "PingFang SC", sans-serif;
            --radius-card: 14px;
            --radius-btn: 8px;
            --radius-pill: 999px;
            --shadow-card: 0 4px 16px rgba(11, 52, 43, 0.06);
            --shadow-hover: 0 10px 24px rgba(11, 52, 43, 0.12);
            --shadow-deep: 0 16px 40px rgba(11, 52, 43, 0.18);
            --transition: 0.25s ease;
            --max-width: 1200px;
            --header-height: 68px;
            --section-pad: 72px;
            --section-pad-mobile: 44px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            color: var(--color-text);
            background: var(--color-bg);
            line-height: 1.8;
            overflow-x: hidden;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition), background-color var(--transition), border-color var(--transition), opacity var(--transition);
        }

        button {
            font-family: var(--font-sans);
            cursor: pointer;
            border: none;
            background: none;
            font-size: inherit;
            transition: background-color var(--transition), color var(--transition), border-color var(--transition), box-shadow var(--transition), transform var(--transition);
        }

        input,
        select,
        textarea {
            font-family: var(--font-sans);
            font-size: 15px;
            color: var(--color-text);
            border-radius: var(--radius-btn);
            border: 1px solid #D9E0DB;
            background: var(--color-white);
            padding: 12px 16px;
            outline: none;
            transition: border-color var(--transition), box-shadow var(--transition);
            width: 100%;
        }

        input:focus,
        select:focus,
        textarea:focus {
            border-color: var(--color-accent);
            box-shadow: 0 0 0 3px rgba(201, 162, 75, 0.12);
        }

        input::placeholder,
        textarea::placeholder {
            color: #9AA8A2;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 28px;
        }

        /* ========== Header / Navigation ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--color-primary-deep);
            height: var(--header-height);
            display: flex;
            align-items: center;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.18);
            border-bottom: 1px solid rgba(201, 162, 75, 0.2);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .logo {
            display: flex;
            align-items: baseline;
            gap: 4px;
            font-weight: 700;
            font-size: 22px;
            color: var(--color-white);
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }

        .logo .logo-mark {
            color: var(--color-accent);
            font-size: 24px;
            margin-right: 2px;
        }

        .logo .logo-sub {
            font-size: 14px;
            font-weight: 400;
            color: rgba(255, 255, 255, 0.65);
            margin-left: 8px;
            letter-spacing: 0.3px;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .main-nav a {
            color: rgba(255, 255, 255, 0.78);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 6px;
            letter-spacing: 0.3px;
            position: relative;
        }

        .main-nav a:hover {
            color: var(--color-white);
            background: rgba(255, 255, 255, 0.08);
        }

        .main-nav a.active {
            color: var(--color-accent);
        }

        .main-nav a.active::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 28px;
            height: 2px;
            background: var(--color-accent);
            border-radius: 2px;
        }

        .nav-cta {
            background: var(--color-accent);
            color: var(--color-primary-deep);
            font-weight: 600;
            font-size: 14px;
            padding: 9px 20px;
            border-radius: 6px;
            letter-spacing: 0.4px;
            margin-left: 12px;
            flex-shrink: 0;
            transition: background-color var(--transition), color var(--transition), transform var(--transition);
        }

        .nav-cta:hover {
            background: var(--color-accent-light);
            color: var(--color-primary-deep);
            transform: translateY(-1px);
        }

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

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 6px;
            z-index: 110;
        }

        .hamburger span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--color-white);
            border-radius: 2px;
            transition: transform 0.3s ease, opacity 0.3s ease;
        }

        .hamburger.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }

        .hamburger.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ========== Breadcrumb ========== */
        .breadcrumb-nav {
            padding: 22px 0 10px;
            font-size: 14px;
            color: var(--color-text-secondary);
        }

        .breadcrumb-nav a {
            color: var(--color-primary);
            font-weight: 500;
            transition: color var(--transition);
        }

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

        .breadcrumb-nav .separator {
            margin: 0 10px;
            color: var(--color-text-light);
        }

        .breadcrumb-nav .current {
            color: var(--color-text-light);
            font-weight: 400;
        }

        /* ========== Category H1 Area ========== */
        .page-head-section {
            padding: 28px 0 40px;
            background: transparent;
        }

        .page-head-section .container {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 40px;
            flex-wrap: wrap;
        }

        .page-head-left h1 {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.25;
            color: var(--color-primary);
            letter-spacing: 0.5px;
            margin-bottom: 12px;
        }

        .page-head-left .head-desc {
            font-size: 16px;
            color: var(--color-text-secondary);
            max-width: 680px;
            line-height: 1.8;
        }

        .page-head-right {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }

        .head-stat {
            background: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 14px 20px;
            text-align: center;
            box-shadow: var(--shadow-card);
            min-width: 90px;
        }

        .head-stat .number {
            font-family: var(--font-numeric);
            font-size: 26px;
            font-weight: 700;
            color: var(--color-accent);
            line-height: 1.2;
        }

        .head-stat .label {
            font-size: 12px;
            color: var(--color-text-secondary);
            font-weight: 500;
        }

        /* ========== Section Common ========== */
        main {
            flex: 1;
            width: 100%;
        }

        .section {
            padding: var(--section-pad) 0;
        }

        .section-alt {
            background: var(--color-bg-alt);
        }

        .section-dark {
            background: var(--color-primary);
        }

        .section-head {
            margin-bottom: 36px;
        }

        .section-head h2 {
            font-size: 28px;
            font-weight: 600;
            line-height: 1.3;
            color: var(--color-primary);
            letter-spacing: 0.3px;
            margin-bottom: 8px;
        }

        .section-head p {
            font-size: 15px;
            color: var(--color-text-secondary);
            max-width: 720px;
            line-height: 1.8;
        }

        .section-dark .section-head h2 {
            color: var(--color-white);
        }

        .section-dark .section-head p {
            color: rgba(255, 255, 255, 0.7);
        }

        /* ========== Filter Tags ========== */
        .filter-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 8px;
        }

        .filter-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: var(--radius-pill);
            font-size: 14px;
            font-weight: 500;
            letter-spacing: 0.3px;
            background: var(--color-white);
            color: var(--color-text-secondary);
            border: 1px solid var(--color-border-strong);
            cursor: pointer;
            transition: all var(--transition);
            user-select: none;
        }

        .filter-tag:hover {
            border-color: var(--color-accent);
            color: var(--color-primary);
            background: rgba(201, 162, 75, 0.08);
        }

        .filter-tag.active {
            background: var(--color-primary);
            color: var(--color-white);
            border-color: var(--color-primary);
            font-weight: 600;
        }

        .filter-tag.active:hover {
            background: var(--color-primary-dark);
            color: var(--color-white);
        }

        .filter-tag:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }

        /* ========== Resource Cards ========== */
        .resource-grid {
            display: flex;
            flex-direction: column;
            gap: 16px;
            margin-top: 8px;
        }

        .resource-card {
            display: flex;
            align-items: center;
            gap: 20px;
            background: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 18px 24px;
            box-shadow: var(--shadow-card);
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
        }

        .resource-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
            border-color: var(--color-border-strong);
        }

        .resource-icon {
            flex-shrink: 0;
            width: 52px;
            height: 52px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            font-weight: 700;
            color: var(--color-white);
            letter-spacing: 0;
        }

        .resource-icon.xlsx {
            background: #1B5E3B;
        }
        .resource-icon.pdf {
            background: #B23B3B;
        }
        .resource-icon.docx {
            background: #2B5797;
        }
        .resource-icon.pptx {
            background: #B85C1A;
        }
        .resource-icon.zip {
            background: #5D4A8A;
        }
        .resource-icon.png {
            background: #2E7D6B;
        }
        .resource-icon.csv {
            background: #4A6B5A;
        }

        .resource-info {
            flex: 1;
            min-width: 0;
        }

        .resource-info h3 {
            font-size: 17px;
            font-weight: 600;
            line-height: 1.4;
            color: var(--color-text);
            margin-bottom: 4px;
            letter-spacing: 0.2px;
        }

        .resource-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--color-text-secondary);
        }

        .resource-meta .badge {
            display: inline-flex;
            align-items: center;
            padding: 2px 12px;
            border-radius: var(--radius-pill);
            background: #E4EFE9;
            color: var(--color-primary-dark);
            font-weight: 600;
            font-size: 12px;
            letter-spacing: 0.3px;
        }

        .resource-meta .size {
            color: var(--color-text-light);
        }

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

        .btn-download {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--color-primary);
            color: var(--color-white);
            font-weight: 600;
            font-size: 14px;
            padding: 9px 20px;
            border-radius: var(--radius-btn);
            letter-spacing: 0.3px;
            transition: background-color var(--transition), color var(--transition), transform var(--transition);
        }

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

        .btn-download:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }

        .btn-download .icon-arrow {
            font-size: 16px;
            line-height: 1;
        }

        /* ========== Resource Description ========== */
        .resource-desc-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .resource-desc-image {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-deep);
        }

        .resource-desc-image img {
            width: 100%;
            height: 280px;
            object-fit: cover;
        }

        .resource-desc-text h3 {
            font-size: 22px;
            font-weight: 600;
            color: var(--color-primary);
            margin-bottom: 14px;
            line-height: 1.4;
        }

        .resource-desc-text p {
            font-size: 15px;
            color: var(--color-text-secondary);
            line-height: 1.9;
            margin-bottom: 14px;
        }

        .resource-desc-text ul {
            list-style: none;
            padding: 0;
            margin: 0 0 16px;
        }

        .resource-desc-text ul li {
            position: relative;
            padding-left: 24px;
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.8;
            margin-bottom: 6px;
        }

        .resource-desc-text ul li::before {
            content: "◆";
            position: absolute;
            left: 0;
            top: 0;
            color: var(--color-accent);
            font-size: 10px;
            line-height: 1.8;
        }

        /* ========== Tutorial Links ========== */
        .tutorial-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 14px;
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .tutorial-list li {
            display: flex;
            align-items: center;
            gap: 14px;
            background: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: 10px;
            padding: 14px 18px;
            box-shadow: var(--shadow-card);
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
        }

        .tutorial-list li:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
            border-color: var(--color-border-strong);
        }

        .tutorial-list .tutorial-num {
            flex-shrink: 0;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: rgba(201, 162, 75, 0.15);
            color: var(--color-accent);
            font-weight: 700;
            font-size: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .tutorial-list .tutorial-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--color-primary);
            transition: color var(--transition);
            flex: 1;
        }

        .tutorial-list li:hover .tutorial-link {
            color: var(--color-accent);
        }

        /* ========== Update List ========== */
        .update-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .update-item {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 16px 20px;
            border-bottom: 1px solid var(--color-border);
            transition: background-color var(--transition);
        }

        .update-item:last-child {
            border-bottom: none;
        }

        .update-item:hover {
            background: rgba(201, 162, 75, 0.05);
        }

        .update-date {
            flex-shrink: 0;
            font-family: var(--font-numeric);
            font-size: 13px;
            font-weight: 600;
            color: var(--color-accent);
            letter-spacing: 0.5px;
            min-width: 80px;
        }

        .update-content {
            flex: 1;
            font-size: 15px;
            color: var(--color-text);
            line-height: 1.7;
        }

        .update-content a {
            color: var(--color-primary);
            font-weight: 500;
        }

        .update-content a:hover {
            color: var(--color-accent);
        }

        /* ========== Form Section ========== */
        .form-section {
            background: var(--color-primary);
            position: relative;
            overflow: hidden;
        }

        .form-section::before {
            content: "";
            position: absolute;
            top: -60px;
            right: -40px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(201, 162, 75, 0.08);
            pointer-events: none;
        }

        .form-section .container {
            position: relative;
            z-index: 1;
        }

        .form-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .form-text h2 {
            font-size: 28px;
            font-weight: 600;
            color: var(--color-white);
            line-height: 1.3;
            margin-bottom: 12px;
        }

        .form-text p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.8;
        }

        .resource-form {
            display: flex;
            flex-direction: column;
            gap: 14px;
            background: var(--color-white);
            padding: 28px;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-deep);
        }

        .resource-form label {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 4px;
            display: block;
        }

        .resource-form .form-row {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .resource-form select,
        .resource-form input {
            background: var(--color-bg);
            border: 1px solid #D9E0DB;
        }

        .btn-submit {
            background: var(--color-accent);
            color: var(--color-primary-deep);
            font-weight: 600;
            font-size: 16px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            letter-spacing: 0.4px;
            transition: background-color var(--transition), color var(--transition), transform var(--transition);
            margin-top: 6px;
        }

        .btn-submit:hover {
            background: var(--color-accent-light);
            color: var(--color-primary-deep);
            transform: translateY(-1px);
        }

        .btn-submit:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }

        .form-success {
            display: none;
            background: #E4EFE9;
            color: var(--color-primary-dark);
            padding: 10px 16px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 500;
            text-align: center;
            margin-top: 10px;
        }

        .form-success.show {
            display: block;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--color-primary-deep);
            color: rgba(255, 255, 255, 0.75);
            padding: 48px 0 24px;
            margin-top: 0;
        }

        .site-footer .container {
            display: grid;
            grid-template-columns: 2fr 1fr 1.2fr;
            gap: 36px;
        }

        .footer-brand h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 10px;
            letter-spacing: 0.5px;
        }

        .footer-brand h3 span {
            color: var(--color-accent);
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            max-width: 340px;
        }

        .footer-links h4,
        .footer-contact h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-white);
            margin-bottom: 14px;
            letter-spacing: 0.3px;
        }

        .footer-links ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-links ul li {
            margin-bottom: 8px;
        }

        .footer-links ul li a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--transition);
        }

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

        .footer-contact p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            margin-bottom: 8px;
            line-height: 1.7;
        }

        .footer-contact a {
            color: var(--color-accent);
            font-weight: 500;
        }

        .footer-contact a:hover {
            color: var(--color-accent-light);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            margin-top: 32px;
            padding-top: 18px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--transition);
        }

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

        .footer-bottom .sep {
            margin: 0 6px;
            color: rgba(255, 255, 255, 0.25);
        }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            .resource-desc-layout {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .resource-desc-image img {
                height: 220px;
            }

            .form-layout {
                grid-template-columns: 1fr;
                gap: 28px;
            }

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

            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 60px;
                --section-pad: var(--section-pad-mobile);
            }

            .container {
                padding: 0 20px;
            }

            .hamburger {
                display: flex;
            }

            .main-nav {
                position: fixed;
                top: 0;
                right: -100%;
                width: 100%;
                max-width: 360px;
                height: 100vh;
                background: var(--color-primary-deep);
                flex-direction: column;
                align-items: flex-start;
                justify-content: flex-start;
                padding: 90px 32px 32px;
                gap: 6px;
                transition: right 0.35s ease;
                box-shadow: -4px 0 24px rgba(0, 0, 0, 0.3);
                z-index: 105;
            }

            .main-nav.open {
                right: 0;
            }

            .main-nav a {
                font-size: 16px;
                padding: 12px 16px;
                width: 100%;
                color: rgba(255, 255, 255, 0.85);
            }

            .main-nav a.active {
                color: var(--color-accent);
                background: rgba(201, 162, 75, 0.1);
            }

            .main-nav a.active::after {
                display: none;
            }

            .nav-cta {
                display: none;
            }

            .logo .logo-sub {
                display: none;
            }

            .page-head-section .container {
                flex-direction: column;
                gap: 20px;
            }

            .page-head-left h1 {
                font-size: 28px;
            }

            .head-stat .number {
                font-size: 22px;
            }

            .resource-card {
                flex-direction: column;
                align-items: flex-start;
                gap: 14px;
                padding: 16px 18px;
            }

            .resource-actions {
                width: 100%;
                justify-content: flex-start;
            }

            .btn-download {
                width: 100%;
                justify-content: center;
            }

            .tutorial-list {
                grid-template-columns: 1fr;
            }

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

    .resource-desc-image img {
                height: 180px;
            }

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

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

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                text-align: left;
            }

            .section-head h2 {
                font-size: 24px;
            }

            .update-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 4px;
            }
        }

        @media (max-width: 520px) {
            .head-stat {
                min-width: 70px;
                padding: 10px 14px;
            }

            .head-stat .number {
                font-size: 18px;
            }

            .filter-tags {
                gap: 8px;
            }

            .filter-tag {
                padding: 6px 14px;
                font-size: 13px;
            }

            .resource-card {
                padding: 14px 16px;
            }

            .resource-icon {
                width: 44px;
                height: 44px;
                font-size: 20px;
                border-radius: 10px;
            }

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

/* roulang page: category5 */
:root {
            --color-primary: #0B342B;
            --color-primary-dark: #103D33;
            --color-primary-deep: #082920;
            --color-accent: #C9A24B;
            --color-accent-light: #D4AF37;
            --color-accent-soft: #E8D5A3;
            --color-bg: #F7F5F0;
            --color-bg-alt: #EEF2EE;
            --color-text: #1F2A26;
            --color-text-secondary: #5D6A64;
            --color-text-light: #8A9993;
            --color-white: #FFFFFF;
            --color-border: rgba(11, 52, 43, 0.08);
            --color-border-strong: rgba(11, 52, 43, 0.16);
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", sans-serif;
            --font-numeric: "Inter", "Roboto", "PingFang SC", sans-serif;
            --radius-card: 14px;
            --radius-btn: 8px;
            --radius-pill: 999px;
            --shadow-card: 0 4px 16px rgba(11, 52, 43, 0.06);
            --shadow-hover: 0 10px 24px rgba(11, 52, 43, 0.12);
            --shadow-deep: 0 16px 40px rgba(11, 52, 43, 0.18);
            --transition: 0.25s ease;
            --max-width: 1200px;
            --header-height: 68px;
            --section-pad: 72px;
            --section-pad-mobile: 44px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            color: var(--color-text);
            background: var(--color-bg);
            line-height: 1.8;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition), background-color var(--transition), border-color var(--transition), opacity var(--transition);
        }

        button {
            font-family: var(--font-sans);
            cursor: pointer;
            border: none;
            background: none;
            font-size: inherit;
            transition: background-color var(--transition), color var(--transition), border-color var(--transition), box-shadow var(--transition), transform var(--transition);
        }

        input,
        select,
        textarea {
            font-family: var(--font-sans);
            font-size: 15px;
            color: var(--color-text);
            border-radius: 8px;
            border: 1px solid #D9E0DB;
            background: var(--color-white);
            padding: 10px 14px;
            outline: none;
            transition: border-color var(--transition), box-shadow var(--transition);
        }

        input:focus,
        select:focus,
        textarea:focus {
            border-color: var(--color-accent);
            box-shadow: 0 0 0 3px rgba(201, 162, 75, 0.12);
        }

        input::placeholder,
        textarea::placeholder {
            color: #9AA8A2;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 28px;
        }

        /* ========== Header / Navigation ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--color-primary-deep);
            height: var(--header-height);
            display: flex;
            align-items: center;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.18);
            border-bottom: 1px solid rgba(201, 162, 75, 0.2);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .logo {
            display: flex;
            align-items: baseline;
            gap: 4px;
            font-weight: 700;
            font-size: 22px;
            color: var(--color-white);
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }

        .logo .logo-mark {
            color: var(--color-accent);
            font-size: 24px;
            margin-right: 2px;
        }

        .logo .logo-sub {
            font-size: 14px;
            font-weight: 400;
            color: rgba(255, 255, 255, 0.65);
            margin-left: 8px;
            letter-spacing: 0.3px;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .main-nav a {
            color: rgba(255, 255, 255, 0.78);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 6px;
            letter-spacing: 0.3px;
            position: relative;
        }

        .main-nav a:hover {
            color: var(--color-white);
            background: rgba(255, 255, 255, 0.08);
        }

        .main-nav a.active {
            color: var(--color-accent);
        }

        .main-nav a.active::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 28px;
            height: 2px;
            background: var(--color-accent);
            border-radius: 2px;
        }

        .nav-cta {
            background: var(--color-accent);
            color: var(--color-primary-deep);
            font-weight: 600;
            font-size: 14px;
            padding: 9px 20px;
            border-radius: 6px;
            letter-spacing: 0.4px;
            margin-left: 12px;
            flex-shrink: 0;
        }

        .nav-cta:hover {
            background: var(--color-accent-light);
            color: var(--color-primary-deep);
            transform: translateY(-1px);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            padding: 4px;
            border-radius: 4px;
        }

        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--color-white);
            border-radius: 2px;
            transition: var(--transition);
        }

        /* ========== Breadcrumb ========== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--color-text-secondary);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }

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

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

        .breadcrumb .separator {
            color: var(--color-text-light);
            user-select: none;
        }

        .breadcrumb .current {
            color: var(--color-primary);
            font-weight: 600;
        }

        /* ========== Page H1 ========== */
        .page-head {
            padding: 56px 0 40px;
            background: var(--color-bg-alt);
            border-bottom: 1px solid var(--color-border);
        }

        .page-head h1 {
            font-size: 38px;
            font-weight: 700;
            color: var(--color-primary);
            line-height: 1.25;
            letter-spacing: 0.5px;
        }

        .page-head .lead {
            font-size: 17px;
            color: var(--color-text-secondary);
            margin-top: 14px;
            max-width: 680px;
            line-height: 1.9;
        }

        /* ========== Sections ========== */
        .section {
            padding: var(--section-pad) 0;
        }

        .section-dark {
            background: var(--color-primary);
            color: var(--color-white);
        }

        .section-dark .section-title {
            color: var(--color-white);
        }

        .section-dark .section-subtitle {
            color: rgba(255, 255, 255, 0.7);
        }

        .section-alt {
            background: var(--color-bg-alt);
        }

        .section-title {
            font-size: 30px;
            font-weight: 600;
            color: var(--color-primary);
            line-height: 1.3;
            letter-spacing: 0.3px;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--color-text-secondary);
            margin-top: 10px;
            line-height: 1.9;
            max-width: 640px;
        }

        .section-head {
            margin-bottom: 40px;
        }

        .section-head.center {
            text-align: center;
        }

        .section-head.center .section-subtitle {
            margin-left: auto;
            margin-right: auto;
        }

        /* ========== Brand Narrative ========== */
        .narrative-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .narrative-grid.reverse {
            grid-template-columns: 1fr 1fr;
        }

        .narrative-grid.reverse .narrative-image {
            order: 1;
        }

        .narrative-grid.reverse .narrative-text {
            order: 2;
        }

        .narrative-text h2 {
            font-size: 26px;
            font-weight: 600;
            color: var(--color-primary);
            line-height: 1.4;
            margin-bottom: 20px;
        }

        .narrative-text p {
            font-size: 16px;
            color: var(--color-text-secondary);
            line-height: 2;
            margin-bottom: 16px;
        }

        .narrative-image {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-deep);
            position: relative;
        }

        .narrative-image img {
            width: 100%;
            height: 360px;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .narrative-image:hover img {
            transform: scale(1.02);
        }

        .narrative-image::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 52, 43, 0.12) 0%, rgba(11, 52, 43, 0.02) 60%);
            pointer-events: none;
        }

        /* ========== Brand Values ========== */
        .value-strip {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 0;
            background: var(--color-white);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
        }

        .value-item {
            padding: 36px 32px;
            border-right: 1px solid var(--color-border);
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            gap: 14px;
            transition: background-color var(--transition);
        }

        .value-item:last-child {
            border-right: none;
        }

        .value-item:hover {
            background: var(--color-bg-alt);
        }

        .value-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--color-primary);
            color: var(--color-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .value-item h3 {
            font-size: 19px;
            font-weight: 600;
            color: var(--color-primary);
            line-height: 1.4;
        }

        .value-item p {
            font-size: 15px;
            color: var(--color-text-secondary);
            line-height: 1.8;
        }

        /* ========== Timeline ========== */
        .timeline {
            position: relative;
            padding-left: 32px;
        }

        .timeline::before {
            content: "";
            position: absolute;
            left: 8px;
            top: 8px;
            bottom: 8px;
            width: 2px;
            background: rgba(201, 162, 75, 0.35);
            border-radius: 2px;
        }

        .timeline-item {
            position: relative;
            margin-bottom: 32px;
            padding-left: 28px;
        }

        .timeline-item:last-child {
            margin-bottom: 0;
        }

        .timeline-item::before {
            content: "";
            position: absolute;
            left: -28px;
            top: 8px;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background: var(--color-accent);
            border: 3px solid var(--color-white);
            box-shadow: 0 0 0 3px rgba(201, 162, 75, 0.25);
        }

        .timeline-year {
            font-size: 14px;
            font-weight: 700;
            color: var(--color-accent);
            letter-spacing: 1px;
            text-transform: uppercase;
            margin-bottom: 6px;
            font-family: var(--font-numeric);
        }

        .timeline-item h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--color-primary);
            line-height: 1.4;
            margin-bottom: 8px;
        }

        .timeline-item p {
            font-size: 15px;
            color: var(--color-text-secondary);
            line-height: 1.8;
        }

        /* ========== Fan Interaction ========== */
        .interaction-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .interaction-card {
            background: var(--color-white);
            border-radius: var(--radius-card);
            padding: 28px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            transition: box-shadow var(--transition), transform var(--transition);
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .interaction-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .interaction-card .card-top {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .interaction-card .avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--color-primary);
            color: var(--color-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 16px;
            flex-shrink: 0;
            letter-spacing: 0.5px;
        }

        .interaction-card .user-info h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-primary);
            line-height: 1.4;
        }

        .interaction-card .user-info .time {
            font-size: 13px;
            color: var(--color-text-light);
        }

        .interaction-card .comment-text {
            font-size: 15px;
            color: var(--color-text-secondary);
            line-height: 1.9;
        }

        .interaction-card .tag {
            align-self: flex-start;
            background: #E4EFE9;
            color: var(--color-primary);
            font-weight: 600;
            font-size: 12px;
            padding: 3px 12px;
            border-radius: var(--radius-pill);
            letter-spacing: 0.4px;
        }

        /* ========== Contact Form ========== */
        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: flex-start;
        }

        .contact-text h2 {
            font-size: 26px;
            font-weight: 600;
            color: var(--color-white);
            line-height: 1.4;
            margin-bottom: 16px;
        }

        .contact-text p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.72);
            line-height: 2;
            margin-bottom: 20px;
        }

        .contact-text .contact-note {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            line-height: 1.9;
        }

        .contact-form {
            background: var(--color-white);
            border-radius: var(--radius-card);
            padding: 32px;
            box-shadow: var(--shadow-deep);
        }

        .form-group {
            margin-bottom: 18px;
        }

        .form-group label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            color: var(--color-primary);
            margin-bottom: 6px;
            letter-spacing: 0.3px;
        }

        .form-group input,
        .form-group select,
        .form-group textarea {
            width: 100%;
            min-height: 44px;
            border-radius: 8px;
            border: 1px solid #D9E0DB;
            padding: 10px 14px;
            font-size: 15px;
            background: var(--color-bg);
            transition: border-color var(--transition), box-shadow var(--transition);
        }

        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            border-color: var(--color-accent);
            box-shadow: 0 0 0 3px rgba(201, 162, 75, 0.12);
        }

        .form-group textarea {
            min-height: 100px;
            resize: vertical;
        }

        .btn-primary {
            background: var(--color-accent);
            color: var(--color-primary-deep);
            font-weight: 600;
            font-size: 16px;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            letter-spacing: 0.4px;
            width: 100%;
            text-align: center;
            transition: background-color var(--transition), transform var(--transition), box-shadow var(--transition);
        }

        .btn-primary:hover {
            background: var(--color-accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(201, 162, 75, 0.3);
        }

        .btn-primary:focus {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }

        .form-success {
            display: none;
            background: #E4EFE9;
            border: 1px solid rgba(11, 52, 43, 0.15);
            border-radius: 8px;
            padding: 16px 20px;
            color: var(--color-primary);
            font-weight: 600;
            font-size: 15px;
            text-align: center;
            margin-top: 12px;
        }

        .form-success.visible {
            display: block;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--color-primary-deep);
            color: rgba(255, 255, 255, 0.65);
            padding: 56px 0 0;
            font-size: 14px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.3fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .footer-brand .logo {
            font-size: 20px;
            margin-bottom: 12px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.9;
            color: rgba(255, 255, 255, 0.55);
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-white);
            letter-spacing: 0.5px;
            margin-bottom: 16px;
        }

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

        .footer-col ul a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 14px;
            transition: color var(--transition);
        }

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

        .footer-bottom {
            padding: 20px 0 28px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.55);
            transition: color var(--transition);
        }

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

        .footer-bottom .footer-links {
            display: flex;
            gap: 16px;
            align-items: center;
            flex-wrap: wrap;
        }

        /* ========== Responsive ========== */
        @media (max-width: 1023px) {
            .narrative-grid,
            .narrative-grid.reverse {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .narrative-grid.reverse .narrative-image {
                order: 1;
            }

            .narrative-grid.reverse .narrative-text {
                order: 2;
            }

            .narrative-image img {
                height: 280px;
            }

            .contact-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

            .value-strip {
                grid-template-columns: 1fr 1fr;
            }

            .value-item:nth-child(2) {
                border-right: none;
            }

            .value-item:nth-child(3) {
                grid-column: 1 / -1;
                border-right: none;
                border-top: 1px solid var(--color-border);
            }

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

        @media (max-width: 768px) {
            :root {
                --section-pad: var(--section-pad-mobile);
                --header-height: 60px;
            }

            .container {
                padding: 0 20px;
            }

            .page-head {
                padding: 40px 0 28px;
            }

            .page-head h1 {
                font-size: 28px;
            }

            .section-title {
                font-size: 24px;
            }

            .nav-toggle {
                display: flex;
            }

            .main-nav {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--color-primary-deep);
                flex-direction: column;
                padding: 16px 24px 24px;
                gap: 4px;
                box-shadow: 0 12px 32px rgba(0, 0, 0, 0.25);
                border-bottom: 1px solid rgba(201, 162, 75, 0.2);
            }

            .main-nav.open {
                display: flex;
            }

            .main-nav a {
                padding: 12px 16px;
                font-size: 16px;
                width: 100%;
            }

            .main-nav a.active::after {
                display: none;
            }

            .nav-cta {
                margin-left: 0;
                margin-top: 8px;
                width: 100%;
                text-align: center;
            }

            .narrative-image img {
                height: 220px;
            }

            .narrative-text h2 {
                font-size: 22px;
            }

            .value-strip {
                grid-template-columns: 1fr;
            }

            .value-item {
                border-right: none;
                border-bottom: 1px solid var(--color-border);
                padding: 24px 20px;
            }

            .value-item:last-child {
                border-bottom: none;
            }

            .value-item:nth-child(2) {
                border-right: none;
            }

            .value-item:nth-child(3) {
                grid-column: auto;
                border-top: none;
            }

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

            .contact-form {
                padding: 24px 20px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }

            .timeline {
                padding-left: 24px;
            }

            .timeline::before {
                left: 6px;
            }

            .timeline-item {
                padding-left: 20px;
            }

            .timeline-item::before {
                left: -22px;
                width: 14px;
                height: 14px;
            }
        }

        @media (max-width: 520px) {
            .page-head h1 {
                font-size: 24px;
            }

            .section-title {
                font-size: 21px;
            }

            .narrative-image img {
                height: 180px;
            }

            .contact-form {
                padding: 20px 16px;
            }

            .btn-primary {
                font-size: 15px;
                padding: 11px 20px;
            }

            .footer-bottom {
                font-size: 12px;
            }
        }