/* roulang page: index */
:root {
            --primary: #14142b;
            --primary-light: #1e1e3a;
            --primary-surface: #252542;
            --accent: #c8943e;
            --accent-hover: #d4a853;
            --accent-light: #f5e6c8;
            --accent-glow: rgba(200, 148, 62, 0.25);
            --bg: #f7f5f0;
            --bg-warm: #faf8f4;
            --surface: #ffffff;
            --surface-alt: #fdfcf9;
            --text: #1a1a24;
            --text-secondary: #5c5a54;
            --text-weak: #8a8780;
            --border: #e6e2d8;
            --border-light: #f0ede6;
            --radius-xs: 6px;
            --radius-sm: 10px;
            --radius: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-xs: 0 1px 2px rgba(20, 20, 43, 0.04);
            --shadow-sm: 0 2px 8px rgba(20, 20, 43, 0.06);
            --shadow: 0 6px 20px rgba(20, 20, 43, 0.09);
            --shadow-lg: 0 16px 40px rgba(20, 20, 43, 0.13);
            --shadow-xl: 0 24px 56px rgba(20, 20, 43, 0.16);
            --transition-fast: 0.18s ease;
            --transition: 0.28s ease;
            --transition-slow: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-stack: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --container-max: 1200px;
            --nav-height: 72px;
        }

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

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

        body {
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background-color: var(--bg);
            min-height: 100vh;
            letter-spacing: 0.01em;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }

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

        button,
        input {
            font-family: inherit;
            font-size: inherit;
        }

        ul,
        ol {
            list-style: none;
        }

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

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--primary);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            box-shadow: var(--shadow-lg);
            transition: box-shadow var(--transition);
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-xl);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            gap: 20px;
        }

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

        .logo-icon {
            width: 42px;
            height: 42px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--accent) 0%, #b8802a 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 18px;
            color: #fff;
            letter-spacing: -0.5px;
            box-shadow: 0 4px 14px var(--accent-glow);
        }

        .logo-text {
            font-size: 1.15rem;
            font-weight: 700;
            color: #ffffff;
            letter-spacing: 0.03em;
            white-space: nowrap;
        }

        .nav-panel {
            display: flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-surface);
            border-radius: var(--radius);
            padding: 5px 6px;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }

        .nav-card {
            display: flex;
            align-items: center;
            gap: 7px;
            padding: 9px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.93rem;
            font-weight: 600;
            color: #c5c3d0;
            transition: all var(--transition-fast);
            white-space: nowrap;
            cursor: pointer;
            position: relative;
        }

        .nav-card i {
            font-size: 0.85rem;
            opacity: 0.7;
            transition: opacity var(--transition-fast);
        }

        .nav-card:hover {
            color: #ffffff;
            background: rgba(255, 255, 255, 0.06);
        }

        .nav-card:hover i {
            opacity: 1;
        }

        .nav-card.active {
            color: #ffffff;
            background: var(--accent);
            box-shadow: 0 4px 14px var(--accent-glow);
        }

        .nav-card.active i {
            opacity: 1;
            color: #fff;
        }

        .header-cta {
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 11px 24px;
            border-radius: 28px;
            font-weight: 700;
            font-size: 0.95rem;
            color: #fff;
            background: linear-gradient(135deg, var(--accent) 0%, #b8802a 100%);
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            box-shadow: 0 6px 20px var(--accent-glow);
            white-space: nowrap;
            letter-spacing: 0.02em;
        }

        .header-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(200, 148, 62, 0.4);
            background: linear-gradient(135deg, var(--accent-hover) 0%, #c8943e 100%);
        }

        .header-cta:active {
            transform: translateY(0);
            box-shadow: 0 4px 12px var(--accent-glow);
        }

        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.5rem;
            cursor: pointer;
            padding: 8px;
            border-radius: var(--radius-xs);
            transition: background var(--transition-fast);
        }

        .mobile-menu-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        @media (max-width: 900px) {
            .nav-panel {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                flex-direction: column;
                gap: 2px;
                padding: 12px 16px;
                border-radius: 0 0 var(--radius) var(--radius);
                background: var(--primary-light);
                border: none;
                border-bottom: 2px solid rgba(255, 255, 255, 0.06);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: all var(--transition);
                z-index: 999;
                box-shadow: var(--shadow-lg);
            }

            .nav-panel.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }

            .nav-card {
                width: 100%;
                padding: 13px 18px;
                font-size: 1rem;
                border-radius: var(--radius-sm);
                justify-content: center;
            }

            .mobile-menu-toggle {
                display: block;
            }

            .header-cta {
                padding: 9px 18px;
                font-size: 0.85rem;
                border-radius: 22px;
            }
        }

        @media (max-width: 520px) {
            .header-cta {
                display: none;
            }
            .logo-text {
                font-size: 0.95rem;
            }
            .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 15px;
            }
        }

        /* ========== HERO ========== */
        .hero {
            position: relative;
            min-height: 580px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: linear-gradient(180deg, rgba(20, 20, 43, 0.88) 0%, rgba(20, 20, 43, 0.7) 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            background-color: var(--primary);
            padding: 80px 24px;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(ellipse at 50% 35%, rgba(200, 148, 62, 0.18) 0%, transparent 70%);
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
            width: 100%;
        }

        .hero-badge {
            display: inline-block;
            padding: 7px 20px;
            border-radius: 24px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.15);
            color: var(--accent-light);
            font-weight: 600;
            font-size: 0.9rem;
            letter-spacing: 0.04em;
            margin-bottom: 24px;
            backdrop-filter: blur(6px);
        }

        .hero-title {
            font-size: 3rem;
            font-weight: 800;
            color: #ffffff;
            line-height: 1.25;
            margin-bottom: 20px;
            letter-spacing: 0.02em;
        }

        .hero-title .highlight {
            color: var(--accent);
            position: relative;
        }

        .hero-desc {
            font-size: 1.2rem;
            color: #c5c3d0;
            line-height: 1.7;
            margin-bottom: 36px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero-buttons {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            justify-content: center;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 30px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: all var(--transition);
            border: none;
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--accent) 0%, #b8802a 100%);
            color: #fff;
            box-shadow: 0 8px 26px var(--accent-glow);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 14px 34px rgba(200, 148, 62, 0.45);
        }

        .btn-outline {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.35);
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.6);
        }

        @media (max-width: 768px) {
            .hero {
                min-height: 460px;
                padding: 60px 20px;
            }
            .hero-title {
                font-size: 2rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
            .btn {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.6rem;
            }
            .hero-badge {
                font-size: 0.8rem;
                padding: 5px 14px;
            }
        }

        /* ========== SECTIONS ========== */
        .section {
            padding: 72px 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-label {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--accent);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 10px;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text);
            letter-spacing: 0.02em;
            margin-bottom: 12px;
            line-height: 1.3;
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 540px;
            margin: 0 auto;
            line-height: 1.6;
        }

        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .section-header {
                margin-bottom: 32px;
            }
        }

        /* ========== FEATURES GRID ========== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .feature-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-xs);
            transition: all var(--transition);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 4px;
            border-radius: 0 0 4px 4px;
            background: var(--accent);
            opacity: 0;
            transition: all var(--transition);
        }

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

        .feature-card:hover::before {
            opacity: 1;
            width: 80px;
        }

        .feature-icon-wrap {
            width: 60px;
            height: 60px;
            border-radius: var(--radius);
            background: var(--accent-light);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 1.5rem;
            color: var(--accent);
            transition: all var(--transition);
        }

        .feature-card:hover .feature-icon-wrap {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 8px 22px var(--accent-glow);
        }

        .feature-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
        }

        .feature-card p {
            font-size: 0.93rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        @media (max-width: 900px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
        }

        @media (max-width: 560px) {
            .features-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .feature-card {
                padding: 24px 20px;
            }
        }

        /* ========== CATEGORY ENTRY ========== */
        .category-entry-section {
            background: var(--surface-alt);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }

        .category-grid {
            display: grid;
            grid-template-columns: repeat(1, 1fr);
            gap: 20px;
            max-width: 700px;
            margin: 0 auto;
        }

        .category-card {
            display: flex;
            align-items: center;
            gap: 20px;
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 24px 28px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-xs);
            transition: all var(--transition);
            cursor: pointer;
        }

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

        .category-card-img {
            width: 100px;
            height: 70px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
        }

        .category-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .category-card-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 4px;
        }

        .category-card-body p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        .category-card-arrow {
            margin-left: auto;
            color: var(--accent);
            font-size: 1.2rem;
            flex-shrink: 0;
            transition: transform var(--transition-fast);
        }

        .category-card:hover .category-card-arrow {
            transform: translateX(4px);
        }

        @media (max-width: 560px) {
            .category-card {
                flex-direction: column;
                text-align: center;
                padding: 20px;
            }
            .category-card-img {
                width: 100%;
                height: 140px;
            }
            .category-card-arrow {
                margin-left: 0;
                margin-top: 8px;
            }
        }

        /* ========== CMS LIST ========== */
        .cms-list-section {
            background: var(--bg);
        }

        .cms-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .cms-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-xs);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }

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

        .cms-card-img {
            width: 100%;
            height: 180px;
            overflow: hidden;
        }

        .cms-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .cms-card:hover .cms-card-img img {
            transform: scale(1.06);
        }

        .cms-card-body {
            padding: 20px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .cms-card-tag {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--accent);
            background: var(--accent-light);
            padding: 4px 12px;
            border-radius: 14px;
            margin-bottom: 10px;
            align-self: flex-start;
        }

        .cms-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
            line-height: 1.4;
            transition: color var(--transition-fast);
        }

        .cms-card:hover h3 {
            color: var(--accent);
        }

        .cms-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.55;
            flex: 1;
        }

        .cms-card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 14px;
            font-size: 0.82rem;
            color: var(--text-weak);
            padding-top: 12px;
            border-top: 1px solid var(--border-light);
        }

        .cms-empty {
            text-align: center;
            padding: 48px 24px;
            color: var(--text-secondary);
            font-size: 1rem;
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px dashed var(--border);
            grid-column: 1 / -1;
        }

        @media (max-width: 768px) {
            .cms-list {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .cms-card-img {
                height: 160px;
            }
        }

        /* ========== STEPS / PROCESS ========== */
        .process-section {
            background: var(--primary);
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .process-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(ellipse at 20% 80%, rgba(200, 148, 62, 0.12) 0%, transparent 55%);
            pointer-events: none;
        }

        .process-section .section-title {
            color: #fff;
        }

        .process-section .section-subtitle {
            color: #b5b4c4;
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
            z-index: 2;
        }

        .step-card {
            text-align: center;
            background: rgba(255, 255, 255, 0.04);
            border-radius: var(--radius-lg);
            padding: 30px 22px;
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all var(--transition);
            position: relative;
        }

        .step-card:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.18);
            transform: translateY(-3px);
            box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
        }

        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--accent);
            color: #fff;
            font-weight: 800;
            font-size: 1.2rem;
            margin-bottom: 16px;
            box-shadow: 0 6px 20px var(--accent-glow);
        }

        .step-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: #fff;
        }

        .step-card p {
            font-size: 0.88rem;
            color: #b5b4c4;
            line-height: 1.5;
        }

        @media (max-width: 900px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }

        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .step-card {
                padding: 22px 18px;
            }
        }

        /* ========== STATS ========== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            text-align: center;
        }

        .stat-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-xs);
            transition: all var(--transition);
        }

        .stat-card:hover {
            box-shadow: var(--shadow);
            transform: translateY(-2px);
        }

        .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1;
            margin-bottom: 8px;
            letter-spacing: -0.02em;
        }

        .stat-label {
            font-size: 0.95rem;
            color: var(--text-secondary);
            font-weight: 600;
        }

        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 14px;
            }
            .stat-number {
                font-size: 2rem;
            }
            .stat-card {
                padding: 22px 14px;
            }
        }

        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr;
                gap: 10px;
            }
        }

        /* ========== FAQ ========== */
        .faq-section {
            background: var(--surface-alt);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }

        .faq-list {
            max-width: 760px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--surface);
            border-radius: var(--radius);
            margin-bottom: 12px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-xs);
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item:hover {
            border-color: var(--border);
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            width: 100%;
            text-align: left;
            padding: 18px 24px;
            background: none;
            border: none;
            font-size: 1rem;
            font-weight: 700;
            color: var(--text);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: color var(--transition-fast);
            line-height: 1.5;
        }

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

        .faq-icon {
            flex-shrink: 0;
            font-size: 0.9rem;
            color: var(--accent);
            transition: transform var(--transition);
        }

        .faq-item.open .faq-icon {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition), padding var(--transition);
        }

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

        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 0.93rem;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        @media (max-width: 520px) {
            .faq-question {
                padding: 14px 16px;
                font-size: 0.93rem;
            }
            .faq-answer-inner {
                padding: 0 16px 16px;
            }
        }

        /* ========== CTA ========== */
        .cta-section {
            background: linear-gradient(180deg, var(--primary) 0%, var(--primary-light) 100%);
            color: #fff;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(ellipse at 50% 30%, rgba(200, 148, 62, 0.2) 0%, transparent 65%);
            pointer-events: none;
        }

        .cta-inner {
            position: relative;
            z-index: 2;
            max-width: 600px;
            margin: 0 auto;
        }

        .cta-inner h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }

        .cta-inner p {
            font-size: 1.05rem;
            color: #c5c3d0;
            margin-bottom: 28px;
            line-height: 1.6;
        }

        .cta-inner .btn-primary {
            font-size: 1.1rem;
            padding: 16px 36px;
            border-radius: 34px;
        }

        @media (max-width: 520px) {
            .cta-inner h2 {
                font-size: 1.5rem;
            }
            .cta-inner p {
                font-size: 0.93rem;
            }
            .cta-inner .btn-primary {
                font-size: 0.95rem;
                padding: 13px 28px;
            }
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--primary);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 40px 0;
            color: #b5b4c4;
        }

        .footer-inner {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 20px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 1rem;
            color: #fff;
        }

        .footer-brand .logo-icon {
            width: 32px;
            height: 32px;
            font-size: 13px;
        }

        .footer-links {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }

        .footer-links a {
            font-size: 0.9rem;
            color: #b5b4c4;
            transition: color var(--transition-fast);
        }

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

        .footer-copy {
            font-size: 0.85rem;
            color: #7a788a;
            width: 100%;
            text-align: center;
            margin-top: 8px;
        }

        @media (max-width: 600px) {
            .footer-inner {
                flex-direction: column;
                text-align: center;
            }
            .footer-links {
                justify-content: center;
            }
        }

/* roulang page: category1 */
:root {
            --color-primary: #1b2a3a;
            --color-primary-light: #263b50;
            --color-accent: #c8943e;
            --color-accent-hover: #d4a853;
            --color-accent-light: #f5ecd7;
            --color-bg: #faf9f6;
            --color-surface: #ffffff;
            --color-text: #2c2c2c;
            --color-text-secondary: #5e5e5e;
            --color-text-muted: #8a8a8a;
            --color-border: #e8e5df;
            --color-border-light: #f0ede7;
            --color-success: #3a8c5c;
            --color-warning: #e8a840;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.10);
            --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12);
            --transition-fast: 0.18s ease;
            --transition-normal: 0.28s ease;
            --transition-slow: 0.4s ease;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

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

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
        }

        input,
        textarea {
            font-family: inherit;
        }

        ul,
        ol {
            list-style: none;
        }

        /* Container */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-sm);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
            transition: opacity var(--transition-fast);
        }
        .logo-link:hover {
            opacity: 0.85;
        }
        .logo-icon-badge {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
            color: #fff;
            font-size: 1.2rem;
            font-weight: 800;
            flex-shrink: 0;
        }

        /* Nav Panel - 卡片化导航 */
        .nav-panel {
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--color-bg);
            border-radius: var(--radius-lg);
            padding: 6px;
            border: 1px solid var(--color-border-light);
        }
        .nav-card {
            display: flex;
            align-items: center;
            gap: 7px;
            padding: 10px 18px;
            border-radius: var(--radius-md);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            transition: all var(--transition-normal);
            white-space: nowrap;
            cursor: pointer;
            position: relative;
        }
        .nav-card i {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            transition: color var(--transition-normal);
        }
        .nav-card:hover {
            background: var(--color-surface);
            color: var(--color-primary);
            box-shadow: var(--shadow-sm);
        }
        .nav-card:hover i {
            color: var(--color-accent);
        }
        .nav-card.active {
            background: var(--color-primary);
            color: #ffffff;
            box-shadow: var(--shadow-md);
            font-weight: 600;
        }
        .nav-card.active i {
            color: var(--color-accent);
        }

        /* Mobile nav toggle */
        .mobile-nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: var(--color-bg);
            border: 1px solid var(--color-border-light);
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--color-text);
            transition: all var(--transition-fast);
        }
        .mobile-nav-toggle:hover {
            background: var(--color-surface);
            box-shadow: var(--shadow-sm);
        }

        /* ========== MAIN ========== */
        .site-main {
            flex: 1;
        }

        /* ========== BREADCRUMB ========== */
        .breadcrumb-bar {
            padding: 16px 0;
            font-size: 0.9rem;
            color: var(--color-text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .breadcrumb-bar a {
            color: var(--color-text-secondary);
            transition: color var(--transition-fast);
        }
        .breadcrumb-bar a:hover {
            color: var(--color-accent);
        }
        .breadcrumb-bar .sep {
            color: var(--color-border);
            font-size: 0.75rem;
        }
        .breadcrumb-bar .current {
            color: var(--color-text);
            font-weight: 500;
        }

        /* ========== CATEGORY HERO ========== */
        .category-hero {
            position: relative;
            border-radius: var(--radius-xl);
            overflow: hidden;
            background: var(--color-primary);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            min-height: 280px;
            display: flex;
            align-items: center;
            margin-bottom: 48px;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(27, 42, 58, 0.82) 0%, rgba(27, 42, 58, 0.55) 100%);
            z-index: 1;
        }
        .category-hero-content {
            position: relative;
            z-index: 2;
            padding: 48px 40px;
            max-width: 700px;
        }
        .category-hero-tag {
            display: inline-block;
            background: var(--color-accent);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 50px;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }
        .category-hero h1 {
            font-size: 2.6rem;
            font-weight: 700;
            color: #ffffff;
            line-height: 1.25;
            margin-bottom: 14px;
            letter-spacing: 0.3px;
        }
        .category-hero p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.7;
            max-width: 560px;
        }

        /* ========== SECTIONS ========== */
        .section {
            padding: 0 0 56px 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 40px;
        }
        .section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 10px;
            letter-spacing: 0.3px;
        }
        .section-header .section-subtitle {
            font-size: 1rem;
            color: var(--color-text-muted);
            max-width: 560px;
            margin: 0 auto;
            line-height: 1.6;
        }
        .section-divider {
            width: 48px;
            height: 3px;
            background: var(--color-accent);
            border-radius: 2px;
            margin: 14px auto 0;
        }

        /* ========== OVERVIEW CARD ========== */
        .overview-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: 36px 40px;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--color-border-light);
            display: flex;
            gap: 32px;
            align-items: flex-start;
            flex-wrap: wrap;
        }
        .overview-icon-wrap {
            flex-shrink: 0;
            width: 64px;
            height: 64px;
            border-radius: var(--radius-md);
            background: var(--color-accent-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            color: var(--color-accent);
        }
        .overview-text {
            flex: 1;
            min-width: 240px;
        }
        .overview-text h3 {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 10px;
        }
        .overview-text p {
            color: var(--color-text-secondary);
            line-height: 1.75;
            font-size: 0.98rem;
        }

        /* ========== STEPS GRID ========== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .step-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: 28px 24px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            text-align: center;
            transition: all var(--transition-normal);
            position: relative;
            overflow: hidden;
        }
        .step-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: var(--color-accent);
        }
        .step-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }
        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--color-primary);
            color: #fff;
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .step-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.6;
        }
        .step-card .step-icon-inline {
            font-size: 1.5rem;
            color: var(--color-accent);
            margin-bottom: 8px;
            display: block;
        }

        /* ========== DETAIL BLOCK ========== */
        .detail-block {
            display: flex;
            gap: 36px;
            align-items: center;
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: 32px;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--color-border-light);
            flex-wrap: wrap;
        }
        .detail-block.reverse {
            flex-direction: row-reverse;
        }
        .detail-image {
            flex: 0 0 320px;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }
        .detail-image img {
            width: 100%;
            height: auto;
            display: block;
            object-fit: cover;
            aspect-ratio: 4/3;
        }
        .detail-content {
            flex: 1;
            min-width: 260px;
        }
        .detail-content h3 {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 12px;
        }
        .detail-content p {
            color: var(--color-text-secondary);
            line-height: 1.75;
            font-size: 0.98rem;
            margin-bottom: 12px;
        }
        .detail-list {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .detail-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 0.95rem;
            color: var(--color-text);
            line-height: 1.6;
        }
        .detail-list li i {
            color: var(--color-success);
            font-size: 1rem;
            margin-top: 3px;
            flex-shrink: 0;
        }

        /* ========== TIPS CARDS ========== */
        .tips-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .tip-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: 28px 28px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            display: flex;
            gap: 16px;
            align-items: flex-start;
            transition: all var(--transition-normal);
        }
        .tip-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--color-accent-light);
        }
        .tip-icon {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background: #fef9f0;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--color-warning);
        }
        .tip-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 6px;
        }
        .tip-card p {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.6;
        }

        /* ========== FAQ ========== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--color-surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border-light);
            overflow: hidden;
            transition: all var(--transition-normal);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-question {
            width: 100%;
            text-align: left;
            padding: 20px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-primary);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            background: none;
            border: none;
            cursor: pointer;
            transition: background var(--transition-fast);
            line-height: 1.5;
        }
        .faq-question:hover {
            background: #fdfcf9;
        }
        .faq-question i {
            font-size: 0.85rem;
            color: var(--color-accent);
            transition: transform var(--transition-normal);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
        }
        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 0.95rem;
            color: var(--color-text-secondary);
            line-height: 1.75;
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            background: var(--color-primary);
            border-radius: var(--radius-xl);
            padding: 52px 40px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(27, 42, 58, 0.78);
            z-index: 1;
        }
        .cta-section>* {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 1.9rem;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: 0.3px;
        }
        .cta-section p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 28px;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.7;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 50px;
            font-size: 1rem;
            font-weight: 600;
            transition: all var(--transition-normal);
            letter-spacing: 0.4px;
            cursor: pointer;
        }
        .btn-accent {
            background: var(--color-accent);
            color: #fff;
            box-shadow: 0 4px 16px rgba(200, 148, 62, 0.35);
        }
        .btn-accent:hover {
            background: var(--color-accent-hover);
            box-shadow: 0 8px 28px rgba(200, 148, 62, 0.5);
            transform: translateY(-2px);
        }
        .btn-accent:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(200, 148, 62, 0.3);
        }
        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.5);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
        }
        .btn-group {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--color-primary);
            color: rgba(255, 255, 255, 0.8);
            padding: 40px 0 28px;
            margin-top: 0;
        }
        .footer-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            margin-bottom: 24px;
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.1rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.5px;
        }
        .footer-brand .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: var(--radius-sm);
            background: var(--color-accent);
            color: #fff;
            font-weight: 800;
            font-size: 1rem;
        }
        .footer-links {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.95rem;
            transition: color var(--transition-fast);
        }
        .footer-links a:hover {
            color: var(--color-accent);
        }
        .footer-copy {
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
            padding-top: 18px;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .detail-block {
                flex-direction: column;
                gap: 24px;
            }
            .detail-block.reverse {
                flex-direction: column;
            }
            .detail-image {
                flex: 0 0 auto;
                width: 100%;
                max-width: 480px;
                margin: 0 auto;
            }
            .category-hero {
                min-height: 220px;
            }
            .category-hero h1 {
                font-size: 2rem;
            }
            .category-hero-content {
                padding: 36px 28px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
            }
            .header-inner {
                padding: 0 16px;
            }
            .logo-link {
                font-size: 1.1rem;
            }
            .logo-icon-badge {
                width: 34px;
                height: 34px;
                font-size: 1rem;
            }
            .nav-panel {
                gap: 4px;
                padding: 4px;
                border-radius: var(--radius-md);
            }
            .nav-card {
                padding: 8px 13px;
                font-size: 0.85rem;
                gap: 5px;
                border-radius: var(--radius-sm);
            }
            .nav-card i {
                font-size: 0.8rem;
            }
            .category-hero {
                min-height: 180px;
                border-radius: var(--radius-lg);
                margin-bottom: 32px;
            }
            .category-hero h1 {
                font-size: 1.6rem;
            }
            .category-hero p {
                font-size: 0.95rem;
            }
            .category-hero-content {
                padding: 28px 20px;
            }
            .category-hero-tag {
                font-size: 0.78rem;
                padding: 4px 12px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .tips-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .section-header h2 {
                font-size: 1.6rem;
            }
            .overview-card {
                flex-direction: column;
                gap: 20px;
                padding: 24px 20px;
            }
            .detail-block {
                padding: 20px;
                gap: 16px;
            }
            .detail-image {
                max-width: 100%;
                border-radius: var(--radius-sm);
            }
            .cta-section {
                padding: 36px 20px;
                border-radius: var(--radius-lg);
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
            .btn {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
            .btn-group {
                gap: 10px;
            }
            .faq-question {
                padding: 16px 18px;
                font-size: 0.95rem;
            }
            .faq-answer-inner {
                padding: 0 18px 16px;
                font-size: 0.9rem;
            }
            .footer-inner {
                flex-direction: column;
                text-align: center;
                gap: 16px;
            }
            .footer-links {
                justify-content: center;
                gap: 16px;
            }
            .container {
                padding: 0 16px;
            }
            .section {
                padding: 0 0 36px 0;
            }
        }

        @media (max-width: 520px) {
            .nav-panel {
                gap: 2px;
                padding: 3px;
                border-radius: var(--radius-sm);
            }
            .nav-card {
                padding: 7px 10px;
                font-size: 0.78rem;
                gap: 3px;
                border-radius: 4px;
            }
            .nav-card i {
                font-size: 0.7rem;
            }
            .logo-link {
                font-size: 0.95rem;
                gap: 6px;
            }
            .logo-icon-badge {
                width: 30px;
                height: 30px;
                font-size: 0.85rem;
                border-radius: 4px;
            }
            .category-hero {
                min-height: 150px;
                border-radius: var(--radius-md);
                margin-bottom: 24px;
            }
            .category-hero h1 {
                font-size: 1.35rem;
            }
            .category-hero p {
                font-size: 0.85rem;
                line-height: 1.5;
            }
            .category-hero-content {
                padding: 20px 16px;
            }
            .category-hero-tag {
                font-size: 0.72rem;
                padding: 3px 10px;
                margin-bottom: 10px;
            }
            .section-header h2 {
                font-size: 1.35rem;
            }
            .section-header .section-subtitle {
                font-size: 0.88rem;
            }
            .overview-card {
                padding: 18px 16px;
            }
            .overview-icon-wrap {
                width: 48px;
                height: 48px;
                font-size: 1.3rem;
            }
            .step-card {
                padding: 20px 16px;
            }
            .step-number {
                width: 38px;
                height: 38px;
                font-size: 1.1rem;
            }
            .step-card h4 {
                font-size: 1rem;
            }
            .btn-group {
                flex-direction: column;
                align-items: center;
                gap: 10px;
            }
            .btn {
                width: 100%;
                justify-content: center;
                max-width: 280px;
            }
        }

/* roulang page: article */
:root {
            --primary: #1B1F3B;
            --primary-light: #252B4A;
            --gold: #C8963E;
            --gold-light: #D4A853;
            --gold-pale: #F5EDDF;
            --accent: #2D5F8A;
            --bg: #F6F5F2;
            --surface: #FFFFFF;
            --surface-alt: #FAF9F7;
            --text: #1F1F2E;
            --text-secondary: #5A5D6E;
            --text-muted: #8B8D9A;
            --border: #E5E3DE;
            --border-light: #F0EEE9;
            --shadow-sm: 0 1px 3px rgba(27, 31, 59, 0.06);
            --shadow: 0 4px 16px rgba(27, 31, 59, 0.08);
            --shadow-lg: 0 8px 32px rgba(27, 31, 59, 0.12);
            --shadow-xl: 0 16px 48px rgba(27, 31, 59, 0.16);
            --radius-sm: 8px;
            --radius: 14px;
            --radius-lg: 20px;
            --radius-xl: 24px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --max-width: 1200px;
            --content-width: 780px;
        }

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

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }

        button {
            cursor: pointer;
            font-family: inherit;
        }

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

        .container-narrow {
            width: 100%;
            max-width: var(--content-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header */
        .site-header {
            background: var(--surface);
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: var(--shadow-sm);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            background: rgba(255, 255, 255, 0.92);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            padding: 14px 0;
            flex-wrap: wrap;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--primary);
            letter-spacing: 0.02em;
            white-space: nowrap;
            flex-shrink: 0;
            transition: opacity var(--transition);
        }

        .logo-link:hover {
            opacity: 0.85;
        }

        .logo-icon-mark {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            color: var(--gold-light);
            border-radius: var(--radius-sm);
            font-size: 1.15rem;
            font-weight: 800;
            letter-spacing: 0;
            box-shadow: 0 2px 8px rgba(27, 31, 59, 0.2);
            flex-shrink: 0;
        }

        /* Nav Panel */
        .nav-panel {
            display: flex;
            align-items: center;
            gap: 6px;
            background: var(--surface-alt);
            border-radius: var(--radius);
            padding: 5px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            flex-shrink: 0;
        }

        .nav-card {
            display: flex;
            align-items: center;
            gap: 7px;
            padding: 9px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            white-space: nowrap;
            background: transparent;
            border: 1px solid transparent;
        }

        .nav-card i {
            font-size: 0.85rem;
            color: var(--text-muted);
            transition: color var(--transition);
        }

        .nav-card:hover {
            background: var(--surface);
            color: var(--primary);
            border-color: var(--border);
            box-shadow: var(--shadow-sm);
        }

        .nav-card:hover i {
            color: var(--gold);
        }

        .nav-card.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: var(--shadow);
            font-weight: 600;
        }

        .nav-card.active i {
            color: var(--gold-light);
        }

        /* Breadcrumb */
        .breadcrumb-wrap {
            padding: 20px 0 8px;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            flex-wrap: wrap;
        }

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

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

        .breadcrumb .sep {
            color: var(--border);
            font-size: 0.7rem;
        }

        .breadcrumb .current {
            color: var(--text-secondary);
            font-weight: 500;
        }

        /* Main */
        .site-main {
            flex: 1;
            padding-bottom: 60px;
        }

        /* Article Area */
        .article-section {
            padding-top: 16px;
        }

        .article-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            overflow: hidden;
            border: 1px solid var(--border-light);
        }

        .article-featured-image {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
            background: var(--surface-alt);
            border-bottom: 1px solid var(--border-light);
        }

        .article-body {
            padding: 36px 40px 48px;
        }

        .article-meta-row {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
            margin-bottom: 20px;
        }

        .article-category-tag {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 5px 14px;
            background: var(--gold-pale);
            color: var(--gold);
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            transition: all var(--transition);
            border: 1px solid transparent;
        }

        .article-category-tag:hover {
            background: var(--gold);
            color: #fff;
            border-color: var(--gold);
        }

        .article-time {
            font-size: 0.82rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 5px;
        }

        .article-time i {
            font-size: 0.75rem;
        }

        .article-title {
            font-size: 1.85rem;
            font-weight: 700;
            line-height: 1.35;
            color: var(--primary);
            margin-bottom: 28px;
            letter-spacing: 0.01em;
        }

        .article-content {
            font-size: 1rem;
            line-height: 1.85;
            color: var(--text);
            word-break: break-word;
        }

        .article-content p {
            margin-bottom: 1.2em;
        }

        .article-content h2 {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            margin: 2em 0 0.8em;
            padding-bottom: 8px;
            border-bottom: 2px solid var(--border-light);
        }

        .article-content h3 {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--primary);
            margin: 1.6em 0 0.6em;
        }

        .article-content ul,
        .article-content ol {
            margin: 0.8em 0 1.2em;
            padding-left: 1.6em;
        }

        .article-content li {
            margin-bottom: 0.4em;
        }

        .article-content blockquote {
            border-left: 4px solid var(--gold);
            background: var(--gold-pale);
            padding: 16px 20px;
            margin: 1.5em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }

        .article-content img {
            border-radius: var(--radius);
            margin: 1.5em 0;
            box-shadow: var(--shadow-sm);
        }

        .article-content a {
            color: var(--accent);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .article-content a:hover {
            color: var(--gold);
        }

        .article-content strong {
            color: var(--primary);
            font-weight: 600;
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5em 0;
            font-size: 0.9rem;
        }

        .article-content th,
        .article-content td {
            border: 1px solid var(--border-light);
            padding: 10px 14px;
            text-align: left;
        }

        .article-content th {
            background: var(--surface-alt);
            font-weight: 600;
            color: var(--primary);
        }

        .article-content pre {
            background: var(--primary);
            color: #e0e0e0;
            padding: 20px;
            border-radius: var(--radius);
            overflow-x: auto;
            margin: 1.5em 0;
            font-size: 0.88rem;
            line-height: 1.6;
        }

        .article-content code {
            background: var(--surface-alt);
            padding: 2px 7px;
            border-radius: 4px;
            font-size: 0.88em;
            color: var(--accent);
        }

        .article-content pre code {
            background: none;
            padding: 0;
            color: inherit;
        }

        .article-divider {
            border: none;
            border-top: 1px solid var(--border-light);
            margin: 36px 0 28px;
        }

        .article-back-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--accent);
            transition: color var(--transition);
        }

        .article-back-link:hover {
            color: var(--gold);
        }

        .article-back-link i {
            font-size: 0.8rem;
        }

        /* Not Found */
        .not-found-area {
            text-align: center;
            padding: 60px 24px;
            background: var(--surface);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
        }

        .not-found-icon {
            font-size: 3.5rem;
            color: var(--text-muted);
            margin-bottom: 16px;
            opacity: 0.6;
        }

        .not-found-title {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
        }

        .not-found-desc {
            color: var(--text-secondary);
            margin-bottom: 28px;
            line-height: 1.6;
        }

        /* Recommend Section */
        .recommend-section {
            margin-top: 44px;
        }

        .recommend-heading {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .recommend-heading::before {
            content: '';
            display: inline-block;
            width: 4px;
            height: 22px;
            background: var(--gold);
            border-radius: 2px;
        }

        .recommend-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
        }

        .recommend-card {
            background: var(--surface);
            border-radius: var(--radius);
            padding: 22px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

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

        .recommend-card-thumb {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            border-radius: var(--radius-sm);
            background: var(--surface-alt);
        }

        .recommend-card-title {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--primary);
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .recommend-card:hover .recommend-card-title {
            color: var(--gold);
        }

        .recommend-card-meta {
            font-size: 0.78rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        /* Footer */
        .site-footer {
            background: var(--primary);
            color: rgba(255, 255, 255, 0.8);
            padding: 36px 0 28px;
            margin-top: auto;
        }

        .footer-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
            margin-bottom: 18px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 600;
            font-size: 1rem;
            color: #fff;
            letter-spacing: 0.02em;
        }

        .footer-brand .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            background: var(--gold);
            color: var(--primary);
            border-radius: 6px;
            font-weight: 800;
            font-size: 0.9rem;
        }

        .footer-links {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }

        .footer-links a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.88rem;
            transition: color var(--transition);
        }

        .footer-links a:hover {
            color: var(--gold-light);
        }

        .footer-copy {
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.5);
            text-align: center;
            padding-top: 16px;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .article-body {
                padding: 28px 28px 36px;
            }
            .article-title {
                font-size: 1.55rem;
            }
            .recommend-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                flex-direction: column;
                align-items: stretch;
                gap: 10px;
                padding: 10px 0;
            }
            .logo-link {
                justify-content: center;
            }
            .nav-panel {
                justify-content: center;
                width: 100%;
            }
            .nav-card {
                flex: 1;
                justify-content: center;
                padding: 10px 12px;
                font-size: 0.85rem;
            }
            .article-body {
                padding: 20px 18px 28px;
            }
            .article-title {
                font-size: 1.35rem;
            }
            .article-content {
                font-size: 0.95rem;
                line-height: 1.75;
            }
            .article-featured-image {
                aspect-ratio: 4 / 3;
            }
            .article-meta-row {
                gap: 8px;
            }
            .recommend-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .recommend-section {
                margin-top: 32px;
            }
            .footer-inner {
                flex-direction: column;
                text-align: center;
            }
            .footer-links {
                justify-content: center;
            }
            .breadcrumb-wrap {
                padding: 14px 0 4px;
            }
            .container,
            .container-narrow {
                padding: 0 16px;
            }
        }

        @media (max-width: 520px) {
            .logo-link {
                font-size: 1.05rem;
            }
            .logo-icon-mark {
                width: 32px;
                height: 32px;
                font-size: 1rem;
                border-radius: 6px;
            }
            .nav-card {
                padding: 8px 10px;
                font-size: 0.8rem;
                gap: 4px;
            }
            .nav-card i {
                font-size: 0.75rem;
            }
            .article-body {
                padding: 16px 14px 24px;
            }
            .article-title {
                font-size: 1.2rem;
            }
            .article-content {
                font-size: 0.9rem;
                line-height: 1.7;
            }
            .article-content h2 {
                font-size: 1.15rem;
            }
            .article-content h3 {
                font-size: 1rem;
            }
            .recommend-card {
                padding: 16px;
            }
            .recommend-card-title {
                font-size: 0.88rem;
            }
            .footer-copy {
                font-size: 0.75rem;
            }
        }