/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --clr-bg: #0f0f1a;
            --clr-bg-alt: #18182b;
            --clr-bg-card: #1c1c32;
            --clr-bg-card-hover: #23233f;
            --clr-primary: #d4a853;
            --clr-primary-light: #e8c87a;
            --clr-primary-dark: #b8923e;
            --clr-accent: #8a7a6a;
            --clr-accent-light: #a89480;
            --clr-text: #e8e0d8;
            --clr-text-muted: #a09888;
            --clr-text-dim: #6a6258;
            --clr-border: rgba(212, 168, 83, 0.25);
            --clr-border-light: rgba(212, 168, 83, 0.12);
            --clr-glow: rgba(212, 168, 83, 0.08);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.5), 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-glow: 0 0 40px rgba(212, 168, 83, 0.06);
            --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans SC', sans-serif;
            --font-display: 'Playfair Display', 'Noto Serif SC', Georgia, serif;
        }

        /* ===== Reset & Base ===== */
        *,
        *::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-body);
            background-color: var(--clr-bg);
            color: var(--clr-text);
            line-height: 1.7;
            font-size: 16px;
            overflow-x: hidden;
            min-height: 100vh;
        }
        a {
            color: var(--clr-primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--clr-primary-light);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }
        ul,
        ol {
            list-style: none;
        }

        /* ===== Container ===== */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Floating Dock Nav ===== */
        .site-header {
            position: fixed;
            top: 20px;
            left: 0;
            right: 0;
            z-index: 1000;
            display: flex;
            justify-content: center;
            pointer-events: none;
        }
        .nav-dock {
            display: flex;
            align-items: center;
            gap: 4px;
            background: rgba(15, 15, 26, 0.82);
            backdrop-filter: blur(20px) saturate(1.4);
            -webkit-backdrop-filter: blur(20px) saturate(1.4);
            border: 1px solid var(--clr-border-light);
            border-radius: 60px;
            padding: 8px 16px;
            box-shadow: 0 8px 48px rgba(0, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.04);
            pointer-events: auto;
            width: auto;
            min-width: 0;
            max-width: 94vw;
            transition: box-shadow var(--transition);
        }
        .nav-dock:hover {
            box-shadow: 0 12px 56px rgba(0, 0, 0, 0.7), 0 0 60px var(--clr-glow), inset 0 1px 0 rgba(255, 255, 255, 0.06);
        }
        .nav-logo {
            font-family: var(--font-display);
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--clr-primary);
            letter-spacing: 0.04em;
            padding: 6px 18px 6px 12px;
            border-right: 1px solid var(--clr-border-light);
            margin-right: 4px;
            white-space: nowrap;
            transition: color var(--transition);
        }
        .nav-logo:hover {
            color: var(--clr-primary-light);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 2px;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: 40px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--clr-text-muted);
            transition: all var(--transition);
            white-space: nowrap;
            position: relative;
        }
        .nav-link:hover {
            color: var(--clr-text);
            background: rgba(212, 168, 83, 0.08);
        }
        .nav-link.active {
            color: var(--clr-primary);
            background: rgba(212, 168, 83, 0.12);
            box-shadow: 0 0 20px rgba(212, 168, 83, 0.06);
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 18px;
            height: 2px;
            background: var(--clr-primary);
            border-radius: 4px;
            opacity: 0.6;
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 22px;
            border-radius: 40px;
            background: linear-gradient(135deg, var(--clr-primary-dark), var(--clr-primary));
            color: #0f0f1a;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition);
            box-shadow: 0 4px 16px rgba(212, 168, 83, 0.2);
            margin-left: 6px;
            white-space: nowrap;
        }
        .nav-cta:hover {
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-primary-light));
            color: #0f0f1a;
            transform: translateY(-1px);
            box-shadow: 0 6px 24px rgba(212, 168, 83, 0.3);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--clr-text);
            font-size: 1.5rem;
            padding: 6px 12px;
            cursor: pointer;
            border-radius: 40px;
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(212, 168, 83, 0.1);
        }

        /* Mobile Nav */
        .mobile-nav {
            display: none;
            position: fixed;
            top: 80px;
            left: 16px;
            right: 16px;
            z-index: 999;
            background: rgba(15, 15, 26, 0.94);
            backdrop-filter: blur(24px) saturate(1.4);
            -webkit-backdrop-filter: blur(24px) saturate(1.4);
            border: 1px solid var(--clr-border-light);
            border-radius: var(--radius-lg);
            padding: 16px 20px;
            box-shadow: 0 24px 80px rgba(0, 0, 0, 0.7);
            opacity: 0;
            transform: translateY(-12px) scale(0.96);
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            pointer-events: none;
        }
        .mobile-nav.open {
            opacity: 1;
            transform: translateY(0) scale(1);
            pointer-events: auto;
        }
        .mobile-nav-link {
            display: block;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            font-size: 1rem;
            font-weight: 500;
            color: var(--clr-text-muted);
            transition: all var(--transition);
        }
        .mobile-nav-link:hover {
            color: var(--clr-text);
            background: rgba(212, 168, 83, 0.08);
        }
        .mobile-nav-link.active {
            color: var(--clr-primary);
            background: rgba(212, 168, 83, 0.12);
        }
        .mobile-nav-cta {
            display: block;
            text-align: center;
            padding: 12px 20px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--clr-primary-dark), var(--clr-primary));
            color: #0f0f1a;
            font-weight: 600;
            margin-top: 8px;
            transition: all var(--transition);
        }
        .mobile-nav-cta:hover {
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-primary-light));
            color: #0f0f1a;
        }

        @media (max-width: 768px) {
            .nav-links,
            .nav-cta {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
            .nav-dock {
                padding: 6px 12px;
                border-radius: 48px;
                width: 100%;
                justify-content: space-between;
            }
            .nav-logo {
                font-size: 1.15rem;
                padding: 4px 12px 4px 8px;
                border-right: none;
            }
            .mobile-nav {
                display: block;
            }
            .site-header {
                top: 12px;
                left: 12px;
                right: 12px;
            }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            background: var(--clr-bg);
            padding: 140px 0 80px;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            opacity: 0.3;
            z-index: 0;
            filter: saturate(0.7) brightness(0.6);
        }
        .hero-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, transparent 40%, var(--clr-bg) 90%);
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(15, 15, 26, 0.4) 0%, var(--clr-bg) 100%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 820px;
            padding: 0 24px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 22px;
            border-radius: 60px;
            background: rgba(212, 168, 83, 0.1);
            border: 1px solid var(--clr-border);
            font-size: 0.85rem;
            color: var(--clr-primary);
            font-weight: 500;
            letter-spacing: 0.03em;
            margin-bottom: 28px;
            backdrop-filter: blur(8px);
        }
        .hero-title {
            font-family: var(--font-display);
            font-size: clamp(2.4rem, 7vw, 4.4rem);
            font-weight: 700;
            line-height: 1.15;
            letter-spacing: 0.02em;
            color: var(--clr-text);
            margin-bottom: 24px;
        }
        .hero-title span {
            color: var(--clr-primary);
            text-shadow: 0 0 60px rgba(212, 168, 83, 0.15);
        }
        .hero-desc {
            font-size: clamp(1.05rem, 2.2vw, 1.3rem);
            color: var(--clr-text-muted);
            max-width: 640px;
            margin: 0 auto 36px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            border-radius: 60px;
            background: linear-gradient(135deg, var(--clr-primary-dark), var(--clr-primary));
            color: #0f0f1a;
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition);
            box-shadow: 0 4px 24px rgba(212, 168, 83, 0.25);
        }
        .btn-primary:hover {
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-primary-light));
            color: #0f0f1a;
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(212, 168, 83, 0.35);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            border-radius: 60px;
            border: 1px solid var(--clr-border);
            color: var(--clr-text);
            font-weight: 500;
            font-size: 1rem;
            transition: all var(--transition);
            background: rgba(255, 255, 255, 0.03);
            backdrop-filter: blur(8px);
        }
        .btn-secondary:hover {
            border-color: var(--clr-primary);
            color: var(--clr-primary);
            background: rgba(212, 168, 83, 0.06);
            transform: translateY(-2px);
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 40px;
            margin-top: 56px;
            padding-top: 40px;
            border-top: 1px solid var(--clr-border-light);
        }
        .hero-stat {
            text-align: center;
        }
        .hero-stat-num {
            font-family: var(--font-display);
            font-size: 2rem;
            font-weight: 700;
            color: var(--clr-primary);
            letter-spacing: 0.02em;
        }
        .hero-stat-label {
            font-size: 0.85rem;
            color: var(--clr-text-muted);
            margin-top: 4px;
        }

        @media (max-width: 768px) {
            .hero {
                padding: 120px 0 60px;
                min-height: 90vh;
            }
            .hero-stats {
                gap: 24px;
                margin-top: 40px;
                padding-top: 28px;
            }
            .hero-stat-num {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 520px) {
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .btn-primary,
            .btn-secondary {
                width: 100%;
                justify-content: center;
            }
            .hero-stats {
                gap: 16px;
                flex-direction: column;
            }
        }

        /* ===== Section Shared ===== */
        .section {
            padding: 80px 0;
            position: relative;
        }
        .section-alt {
            background: var(--clr-bg-alt);
        }
        .section-divider {
            width: 60px;
            height: 2px;
            background: var(--clr-primary);
            opacity: 0.4;
            margin: 0 auto 16px;
            border-radius: 4px;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.8rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.12em;
            color: var(--clr-primary);
            margin-bottom: 12px;
        }
        .section-title {
            font-family: var(--font-display);
            font-size: clamp(1.8rem, 4vw, 2.8rem);
            font-weight: 700;
            color: var(--clr-text);
            text-align: center;
            margin-bottom: 16px;
            line-height: 1.25;
        }
        .section-desc {
            font-size: 1.05rem;
            color: var(--clr-text-muted);
            text-align: center;
            max-width: 600px;
            margin: 0 auto 48px;
            line-height: 1.8;
        }

        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .section-desc {
                margin-bottom: 32px;
                font-size: 0.95rem;
            }
        }

        /* ===== Card Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 24px;
        }
        .card-grid-3 {
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
        }
        .card-grid-4 {
            grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
        }
        @media (max-width: 640px) {
            .card-grid,
            .card-grid-3,
            .card-grid-4 {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Card ===== */
        .card {
            background: var(--clr-bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--clr-border-light);
            padding: 24px;
            transition: all var(--transition);
            box-shadow: var(--shadow-card);
        }
        .card:hover {
            background: var(--clr-bg-card-hover);
            border-color: var(--clr-border);
            transform: translateY(-4px);
            box-shadow: 0 12px 48px rgba(0, 0, 0, 0.5), 0 0 40px var(--clr-glow);
        }
        .card-img {
            border-radius: var(--radius-sm);
            overflow: hidden;
            margin-bottom: 18px;
            aspect-ratio: 16 / 10;
            background: var(--clr-bg-alt);
        }
        .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .card:hover .card-img img {
            transform: scale(1.04);
        }
        .card-tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 40px;
            font-size: 0.7rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            background: rgba(212, 168, 83, 0.12);
            color: var(--clr-primary);
            border: 1px solid rgba(212, 168, 83, 0.15);
            margin-bottom: 12px;
        }
        .card h3 {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--clr-text);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .card p {
            font-size: 0.92rem;
            color: var(--clr-text-muted);
            line-height: 1.7;
        }
        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 14px;
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--clr-primary);
            transition: gap var(--transition);
        }
        .card-link:hover {
            gap: 12px;
            color: var(--clr-primary-light);
        }

        /* ===== Category Cards ===== */
        .cat-card {
            background: var(--clr-bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--clr-border-light);
            padding: 28px 24px;
            text-align: center;
            transition: all var(--transition);
            box-shadow: var(--shadow-card);
            position: relative;
            overflow: hidden;
        }
        .cat-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, transparent, var(--clr-primary), transparent);
            opacity: 0;
            transition: opacity var(--transition);
        }
        .cat-card:hover::before {
            opacity: 0.6;
        }
        .cat-card:hover {
            background: var(--clr-bg-card-hover);
            border-color: var(--clr-border);
            transform: translateY(-4px);
            box-shadow: 0 12px 48px rgba(0, 0, 0, 0.5), 0 0 40px var(--clr-glow);
        }
        .cat-card-icon {
            font-size: 2.4rem;
            color: var(--clr-primary);
            margin-bottom: 16px;
        }
        .cat-card h3 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--clr-text);
            margin-bottom: 8px;
        }
        .cat-card p {
            font-size: 0.88rem;
            color: var(--clr-text-muted);
            line-height: 1.7;
        }
        .cat-card .card-link {
            margin-top: 12px;
        }

        /* ===== Feature / Data Row ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
            gap: 32px;
            text-align: center;
        }
        .feature-item {
            padding: 20px 8px;
        }
        .feature-icon {
            font-size: 2.2rem;
            color: var(--clr-primary);
            margin-bottom: 14px;
            display: block;
        }
        .feature-num {
            font-family: var(--font-display);
            font-size: 2.4rem;
            font-weight: 700;
            color: var(--clr-primary);
            line-height: 1.2;
            margin-bottom: 6px;
        }
        .feature-label {
            font-size: 0.9rem;
            color: var(--clr-text-muted);
            font-weight: 500;
        }
        .feature-desc {
            font-size: 0.85rem;
            color: var(--clr-text-dim);
            margin-top: 6px;
            line-height: 1.6;
        }

        @media (max-width: 640px) {
            .feature-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
        }
        @media (max-width: 400px) {
            .feature-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 32px;
            position: relative;
        }
        .step-item {
            text-align: center;
            position: relative;
            padding: 20px 12px;
        }
        .step-number {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: rgba(212, 168, 83, 0.1);
            border: 1px solid var(--clr-border);
            color: var(--clr-primary);
            font-family: var(--font-display);
            font-size: 1.3rem;
            font-weight: 700;
            margin: 0 auto 16px;
            transition: all var(--transition);
        }
        .step-item:hover .step-number {
            background: rgba(212, 168, 83, 0.2);
            border-color: var(--clr-primary);
            box-shadow: 0 0 30px rgba(212, 168, 83, 0.1);
        }
        .step-item h4 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--clr-text);
            margin-bottom: 6px;
        }
        .step-item p {
            font-size: 0.88rem;
            color: var(--clr-text-muted);
            line-height: 1.7;
        }
        .step-connector {
            display: none;
        }
        @media (min-width: 900px) {
            .steps-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .step-connector {
                display: block;
                position: absolute;
                top: 46px;
                left: calc(50% + 30px);
                width: calc(100% - 60px);
                height: 1px;
                background: linear-gradient(90deg, var(--clr-border), transparent);
                pointer-events: none;
            }
            .steps-grid .step-item:last-child .step-connector {
                display: none;
            }
        }
        @media (max-width: 640px) {
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 720px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--clr-border);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            cursor: pointer;
            font-weight: 500;
            font-size: 1rem;
            color: var(--clr-text);
            transition: color var(--transition);
            user-select: none;
        }
        .faq-question:hover {
            color: var(--clr-primary);
        }
        .faq-question i {
            font-size: 0.85rem;
            color: var(--clr-primary);
            transition: transform 0.4s ease;
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.5s cubic-bezier(0.4, 0, 0.2, 1), padding 0.3s ease;
            padding: 0 22px;
            color: var(--clr-text-muted);
            font-size: 0.92rem;
            line-height: 1.8;
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 22px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--clr-bg-alt);
            border-top: 1px solid var(--clr-border-light);
            border-bottom: 1px solid var(--clr-border-light);
        }
        .cta-box {
            background: linear-gradient(135deg, rgba(212, 168, 83, 0.06), rgba(212, 168, 83, 0.02));
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-lg);
            padding: 56px 40px;
            text-align: center;
            box-shadow: var(--shadow-card), 0 0 60px var(--clr-glow);
        }
        .cta-box h2 {
            font-family: var(--font-display);
            font-size: clamp(1.6rem, 3.5vw, 2.4rem);
            font-weight: 700;
            color: var(--clr-text);
            margin-bottom: 16px;
        }
        .cta-box p {
            font-size: 1.05rem;
            color: var(--clr-text-muted);
            max-width: 520px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }
        .cta-box .btn-primary {
            font-size: 1.05rem;
            padding: 16px 44px;
        }
        @media (max-width: 640px) {
            .cta-box {
                padding: 36px 20px;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--clr-bg);
            border-top: 1px solid var(--clr-border-light);
            padding: 48px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer-brand .nav-logo {
            font-size: 1.4rem;
            border-right: none;
            padding-left: 0;
            display: inline-block;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 0.88rem;
            color: var(--clr-text-muted);
            line-height: 1.8;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 0.85rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--clr-text);
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            font-size: 0.88rem;
            color: var(--clr-text-muted);
            padding: 4px 0;
            transition: all var(--transition);
        }
        .footer-col a:hover {
            color: var(--clr-primary);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid var(--clr-border-light);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 0.82rem;
            color: var(--clr-text-dim);
        }
        .footer-bottom a {
            color: var(--clr-text-dim);
        }
        .footer-bottom a:hover {
            color: var(--clr-primary);
        }
        .footer-social {
            display: flex;
            gap: 14px;
        }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 1px solid var(--clr-border-light);
            color: var(--clr-text-muted);
            transition: all var(--transition);
            font-size: 0.9rem;
        }
        .footer-social a:hover {
            border-color: var(--clr-primary);
            color: var(--clr-primary);
            background: rgba(212, 168, 83, 0.08);
            transform: translateY(-2px);
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }

        /* ===== Utility ===== */
        .text-primary {
            color: var(--clr-primary);
        }
        .text-muted {
            color: var(--clr-text-muted);
        }
        .gap-2 {
            gap: 8px;
        }
        .gap-3 {
            gap: 12px;
        }
        .gap-4 {
            gap: 16px;
        }
        .mt-2 {
            margin-top: 8px;
        }
        .mt-4 {
            margin-top: 16px;
        }
        .mt-6 {
            margin-top: 24px;
        }
        .mt-8 {
            margin-top: 32px;
        }
        .mb-4 {
            margin-bottom: 16px;
        }
        .mb-6 {
            margin-bottom: 24px;
        }
        .text-center {
            text-align: center;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .inline-flex-center {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--clr-bg);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--clr-border);
            border-radius: 12px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--clr-primary);
        }

        /* ===== Selection ===== */
        ::selection {
            background: rgba(212, 168, 83, 0.25);
            color: var(--clr-text);
        }

        /* ===== Skeleton / Empty ===== */
        .empty-state {
            text-align: center;
            padding: 48px 24px;
            color: var(--clr-text-dim);
        }
        .empty-state i {
            font-size: 2.4rem;
            color: var(--clr-border);
            margin-bottom: 16px;
            display: block;
        }
        .empty-state p {
            font-size: 0.95rem;
        }

        /* ===== Post List ===== */
        .post-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .post-item {
            display: flex;
            align-items: flex-start;
            gap: 20px;
            background: var(--clr-bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--clr-border-light);
            padding: 20px 24px;
            transition: all var(--transition);
        }
        .post-item:hover {
            background: var(--clr-bg-card-hover);
            border-color: var(--clr-border);
            transform: translateX(4px);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
        }
        .post-item .post-thumb {
            width: 80px;
            height: 80px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
            background: var(--clr-bg-alt);
        }
        .post-item .post-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .post-item .post-body {
            flex: 1;
            min-width: 0;
        }
        .post-item .post-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.78rem;
            color: var(--clr-text-dim);
            margin-bottom: 6px;
        }
        .post-item .post-meta span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .post-item .post-meta .cat {
            color: var(--clr-primary);
            font-weight: 500;
        }
        .post-item h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--clr-text);
            margin-bottom: 6px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .post-item p {
            font-size: 0.85rem;
            color: var(--clr-text-muted);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .post-item .post-link {
            color: var(--clr-primary);
            font-weight: 500;
            font-size: 0.85rem;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            margin-top: 8px;
            transition: gap var(--transition);
        }
        .post-item .post-link:hover {
            gap: 10px;
            color: var(--clr-primary-light);
        }

        @media (max-width: 640px) {
            .post-item {
                flex-direction: column;
                padding: 16px;
            }
            .post-item .post-thumb {
                width: 100%;
                height: 160px;
            }
        }

/* roulang page: article */
:root {
            --brand-500: #0a9eff;
            --brand-600: #0080e6;
            --brand-700: #0066ba;
            --warm-500: #d48630;
            --bg-body: #f8fafc;
            --text-body: #1e293b;
            --text-muted: #64748b;
            --border-light: #e2e8f0;
            --radius-card: 1rem;
            --shadow-card: 0 4px 24px rgba(0,0,0,0.06), 0 1px 4px rgba(0,0,0,0.04);
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }
        * {
            box-sizing: border-box;
        }
        body {
            font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background: var(--bg-body);
            color: var(--text-body);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            transition: var(--transition);
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        @media (max-width: 640px) {
            .container {
                padding: 0 1rem;
            }
        }

        /* ===== 浮动 Dock 导航 ===== */
        .site-header {
            position: sticky;
            top: 1.25rem;
            z-index: 50;
            padding: 0 1.5rem;
            pointer-events: none;
        }
        .nav-dock {
            max-width: 900px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: rgba(255, 255, 255, 0.82);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            border-radius: 60px;
            padding: 0.5rem 0.75rem 0.5rem 1.5rem;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.50);
            pointer-events: auto;
            transition: var(--transition);
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 700;
            font-size: 1.2rem;
            color: var(--brand-700);
            white-space: nowrap;
            border: none;
            padding: 0.25rem 0;
        }
        .nav-logo i {
            font-size: 1.3rem;
            color: var(--brand-500);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.25rem;
        }
        .nav-links .nav-link {
            padding: 0.5rem 1rem;
            border-radius: 40px;
            font-size: 0.9rem;
            font-weight: 500;
            color: #475569;
            display: flex;
            align-items: center;
            gap: 0.4rem;
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-links .nav-link:hover {
            background: rgba(10, 158, 255, 0.08);
            color: var(--brand-600);
        }
        .nav-links .nav-link.active {
            background: var(--brand-500);
            color: #fff;
            box-shadow: 0 2px 8px rgba(10, 158, 255, 0.30);
        }
        .nav-links .nav-link.active:hover {
            background: var(--brand-600);
            box-shadow: 0 4px 16px rgba(10, 158, 255, 0.40);
        }
        .nav-cta {
            padding: 0.5rem 1.25rem;
            border-radius: 40px;
            background: var(--brand-500);
            color: #fff;
            font-weight: 600;
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 0.4rem;
            box-shadow: 0 2px 8px rgba(10, 158, 255, 0.25);
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-cta:hover {
            background: var(--brand-600);
            box-shadow: 0 4px 16px rgba(10, 158, 255, 0.40);
            transform: translateY(-1px);
            color: #fff;
        }
        .nav-toggle {
            display: none;
            background: transparent;
            border: none;
            font-size: 1.4rem;
            color: #475569;
            cursor: pointer;
            padding: 0.25rem 0.5rem;
            border-radius: 8px;
        }
        .nav-toggle:hover {
            background: rgba(0, 0, 0, 0.05);
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            gap: 0.25rem;
            padding: 1rem 0.5rem 0.75rem;
            margin-top: 0.5rem;
            border-top: 1px solid rgba(0, 0, 0, 0.06);
        }
        .nav-mobile .nav-link {
            padding: 0.6rem 1rem;
            border-radius: 12px;
            font-size: 0.95rem;
            font-weight: 500;
            color: #475569;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            transition: var(--transition);
        }
        .nav-mobile .nav-link:hover {
            background: rgba(10, 158, 255, 0.08);
            color: var(--brand-600);
        }
        .nav-mobile .nav-link.active {
            background: var(--brand-500);
            color: #fff;
        }
        .nav-mobile .nav-cta {
            margin-top: 0.5rem;
            justify-content: center;
            padding: 0.7rem 1.25rem;
            border-radius: 40px;
        }
        .nav-mobile.open {
            display: flex;
        }

        @media (max-width: 768px) {
            .site-header {
                top: 0.75rem;
                padding: 0 1rem;
            }
            .nav-dock {
                flex-wrap: wrap;
                border-radius: 28px;
                padding: 0.4rem 0.6rem 0.4rem 1.25rem;
            }
            .nav-links {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
            .nav-dock .nav-cta.mobile-show {
                display: flex;
            }
        }

        @media (min-width: 769px) {
            .nav-mobile {
                display: none !important;
            }
            .nav-dock .nav-cta.mobile-show {
                display: none;
            }
        }

        /* ===== 文章页 ===== */
        .article-hero {
            background: linear-gradient(135deg, #042d4f 0%, #06487a 40%, #0a5d9e 100%);
            padding: 4rem 0 3rem;
            margin-top: -1rem;
            position: relative;
            overflow: hidden;
        }
        .article-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
            pointer-events: none;
        }
        .article-hero .container {
            position: relative;
            z-index: 2;
        }
        .article-hero h1 {
            font-size: 2rem;
            font-weight: 700;
            color: #fff;
            line-height: 1.3;
            max-width: 800px;
            margin-bottom: 1rem;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.75rem 1.5rem;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.75);
        }
        .article-meta .badge {
            display: inline-block;
            padding: 0.2rem 1rem;
            border-radius: 40px;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(4px);
            font-size: 0.8rem;
            font-weight: 500;
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }
        .article-meta i {
            margin-right: 0.3rem;
            opacity: 0.7;
        }

        .article-main {
            padding: 3rem 0 4rem;
        }
        .article-body {
            background: #fff;
            border-radius: 1.25rem;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.05), 0 1px 4px rgba(0, 0, 0, 0.03);
            padding: 2.5rem 3rem;
            max-width: 820px;
            margin: 0 auto;
        }
        .article-body h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: #0f172a;
            margin: 2rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #eef2f6;
        }
        .article-body h3 {
            font-size: 1.2rem;
            font-weight: 600;
            color: #1e293b;
            margin: 1.5rem 0 0.75rem;
        }
        .article-body p {
            margin-bottom: 1.25rem;
            color: #334155;
            line-height: 1.85;
        }
        .article-body ul,
        .article-body ol {
            margin: 1rem 0 1.5rem 1.5rem;
            color: #334155;
        }
        .article-body li {
            margin-bottom: 0.5rem;
            line-height: 1.75;
        }
        .article-body a {
            color: var(--brand-600);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-body a:hover {
            color: var(--brand-700);
        }
        .article-body blockquote {
            border-left: 4px solid var(--brand-500);
            background: #f0f7ff;
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 0.75rem 0.75rem 0;
            color: #1e293b;
            font-style: normal;
        }
        .article-body img {
            border-radius: 0.75rem;
            margin: 1.5rem auto;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
        }
        .article-body code {
            background: #f1f5f9;
            padding: 0.15rem 0.5rem;
            border-radius: 4px;
            font-size: 0.9em;
            color: #0f172a;
        }
        .article-body pre {
            background: #0f172a;
            color: #e2e8f0;
            border-radius: 0.75rem;
            padding: 1.5rem;
            overflow-x: auto;
            margin: 1.5rem 0;
            font-size: 0.9rem;
            line-height: 1.6;
        }
        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            border-radius: 0.75rem;
            overflow: hidden;
        }
        .article-body th,
        .article-body td {
            border: 1px solid #e2e8f0;
            padding: 0.75rem 1rem;
            text-align: left;
        }
        .article-body th {
            background: #f8fafc;
            font-weight: 600;
            color: #0f172a;
        }

        .article-footer-nav {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 1rem;
            margin-top: 2.5rem;
            padding-top: 2rem;
            border-top: 1px solid #e2e8f0;
        }
        .article-footer-nav a {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.6rem 1.5rem;
            border-radius: 40px;
            background: #f1f5f9;
            font-weight: 500;
            font-size: 0.9rem;
            color: #334155;
            transition: var(--transition);
        }
        .article-footer-nav a:hover {
            background: var(--brand-500);
            color: #fff;
            box-shadow: 0 2px 8px rgba(10, 158, 255, 0.25);
        }

        .article-notfound {
            text-align: center;
            padding: 4rem 2rem;
            background: #fff;
            border-radius: 1.25rem;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.05);
            max-width: 600px;
            margin: 2rem auto;
        }
        .article-notfound i {
            font-size: 3.5rem;
            color: #cbd5e1;
            margin-bottom: 1rem;
        }
        .article-notfound h2 {
            font-size: 1.5rem;
            font-weight: 600;
            color: #0f172a;
            margin-bottom: 0.75rem;
        }
        .article-notfound p {
            color: #64748b;
            margin-bottom: 1.5rem;
        }
        .article-notfound a {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.6rem 1.5rem;
            border-radius: 40px;
            background: var(--brand-500);
            color: #fff;
            font-weight: 500;
            box-shadow: 0 2px 8px rgba(10, 158, 255, 0.25);
            transition: var(--transition);
        }
        .article-notfound a:hover {
            background: var(--brand-600);
            box-shadow: 0 4px 16px rgba(10, 158, 255, 0.40);
            transform: translateY(-2px);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 3.5rem 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-brand .nav-logo {
            color: #fff;
            font-size: 1.4rem;
            margin-bottom: 0.75rem;
        }
        .footer-brand .nav-logo i {
            color: var(--brand-400);
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: #94a3b8;
            max-width: 360px;
            line-height: 1.7;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 1rem;
        }
        .footer-col a {
            display: block;
            color: #94a3b8;
            font-size: 0.9rem;
            padding: 0.3rem 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--brand-400);
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 1.5rem 0;
            font-size: 0.85rem;
            color: #64748b;
        }
        .footer-social {
            display: flex;
            gap: 0.75rem;
        }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 2.2rem;
            height: 2.2rem;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            color: #94a3b8;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--brand-500);
            color: #fff;
            transform: translateY(-2px);
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .article-hero h1 {
                font-size: 1.5rem;
            }
            .article-body {
                padding: 1.5rem 1.25rem;
            }
            .article-meta {
                gap: 0.5rem 1rem;
                font-size: 0.8rem;
            }
            .article-footer-nav {
                flex-direction: column;
                align-items: stretch;
            }
            .article-footer-nav a {
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            .article-hero {
                padding: 3rem 0 2rem;
            }
            .article-hero h1 {
                font-size: 1.25rem;
            }
            .article-body {
                padding: 1.25rem 1rem;
                border-radius: 1rem;
            }
            .article-body h2 {
                font-size: 1.25rem;
            }
            .article-body h3 {
                font-size: 1.1rem;
            }
        }

        /* ===== 面包屑 ===== */
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 1.25rem;
        }
        .breadcrumb a {
            color: rgba(255, 255, 255, 0.7);
            transition: var(--transition);
        }
        .breadcrumb a:hover {
            color: #fff;
        }
        .breadcrumb span {
            color: rgba(255, 255, 255, 0.4);
        }

        /* ===== 相关文章 ===== */
        .related-section {
            padding: 3rem 0 4rem;
            background: #f1f5f9;
        }
        .related-section h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: #0f172a;
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .related-card {
            background: #fff;
            border-radius: 1rem;
            padding: 1.5rem;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
            transition: var(--transition);
            border: 1px solid rgba(0, 0, 0, 0.02);
        }
        .related-card:hover {
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
            transform: translateY(-3px);
        }
        .related-card .cat-tag {
            display: inline-block;
            padding: 0.15rem 0.75rem;
            border-radius: 40px;
            background: #eef2ff;
            color: var(--brand-700);
            font-size: 0.75rem;
            font-weight: 500;
            margin-bottom: 0.5rem;
        }
        .related-card h3 {
            font-size: 1rem;
            font-weight: 600;
            color: #0f172a;
            margin-bottom: 0.5rem;
            line-height: 1.4;
        }
        .related-card h3 a {
            color: inherit;
        }
        .related-card h3 a:hover {
            color: var(--brand-600);
        }
        .related-card p {
            font-size: 0.85rem;
            color: #64748b;
            line-height: 1.6;
            margin-bottom: 0.75rem;
        }
        .related-card .meta {
            font-size: 0.75rem;
            color: #94a3b8;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        @media (max-width: 768px) {
            .related-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 520px) {
            .related-grid {
                grid-template-columns: 1fr;
            }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --primary-dark: #0f2440;
            --accent: #d4a843;
            --accent-light: #e8c56a;
            --accent-dark: #b8912e;
            --bg: #f8f6f2;
            --bg-alt: #f0ece4;
            --bg-card: #ffffff;
            --text: #1a1a2e;
            --text-light: #5a5a6e;
            --text-muted: #8a8a9a;
            --border: #ddd8ce;
            --border-light: #e8e4dc;
            --shadow-sm: 0 1px 4px rgba(0,0,0,0.05);
            --shadow: 0 4px 20px rgba(0,0,0,0.07);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.10);
            --radius: 14px;
            --radius-sm: 8px;
            --radius-xs: 4px;
            --transition: all 0.25s ease;
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        button { cursor: pointer; font-family: inherit; font-size: inherit; border: none; background: none; }
        input, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 600; color: var(--primary-dark); }
        h1 { font-size: 2.8rem; letter-spacing: -0.02em; }
        h2 { font-size: 2.2rem; letter-spacing: -0.01em; }
        h3 { font-size: 1.5rem; }
        h4 { font-size: 1.2rem; }
        p { margin-bottom: 1rem; color: var(--text-light); }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        .section-padding { padding: 80px 0; }
        .section-title { text-align: center; margin-bottom: 16px; }
        .section-subtitle { text-align: center; color: var(--text-light); font-size: 1.1rem; max-width: 640px; margin: 0 auto 48px; }
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 500;
            background: var(--accent-light);
            color: var(--accent-dark);
            letter-spacing: 0.02em;
        }
        .badge-primary { background: var(--primary); color: #fff; }
        .badge-outline { background: transparent; border: 1px solid var(--border); color: var(--text-light); }

        /* ===== 导航 Dock ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 12px 24px;
            background: transparent;
            pointer-events: none;
        }
        .nav-dock {
            max-width: 900px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-radius: 60px;
            padding: 8px 20px 8px 28px;
            box-shadow: 0 4px 24px rgba(0,0,0,0.07);
            border: 1px solid rgba(255,255,255,0.6);
            pointer-events: auto;
            transition: var(--transition);
        }
        .nav-dock:hover { box-shadow: 0 6px 32px rgba(0,0,0,0.10); }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.01em;
            white-space: nowrap;
            border: none !important;
        }
        .nav-logo i { color: var(--accent); font-size: 1.4rem; }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-link {
            padding: 6px 16px;
            border-radius: 40px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-light);
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-link i { margin-right: 6px; font-size: 0.85rem; }
        .nav-link:hover { color: var(--primary); background: rgba(26,58,92,0.06); }
        .nav-link.active { color: #fff; background: var(--primary); box-shadow: 0 2px 8px rgba(26,58,92,0.25); }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 20px;
            border-radius: 40px;
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            box-shadow: 0 4px 14px rgba(212,168,67,0.35);
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-cta:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(212,168,67,0.45); }
        .nav-cta i { font-size: 0.85rem; }
        .nav-toggle { display: none; padding: 8px 12px; color: var(--primary); font-size: 1.4rem; }

        /* ===== 移动端导航 ===== */
        .mobile-menu {
            display: none;
            position: fixed;
            top: 80px;
            left: 24px;
            right: 24px;
            background: rgba(255,255,255,0.97);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-radius: 20px;
            padding: 20px 24px;
            box-shadow: 0 12px 40px rgba(0,0,0,0.15);
            border: 1px solid rgba(255,255,255,0.6);
            z-index: 999;
            flex-direction: column;
            gap: 12px;
            opacity: 0;
            transform: translateY(-12px);
            transition: opacity 0.3s ease, transform 0.3s ease;
            pointer-events: none;
        }
        .mobile-menu.open { display: flex; opacity: 1; transform: translateY(0); pointer-events: auto; }
        .mobile-menu .nav-link {
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            font-size: 1.05rem;
            border-bottom: 1px solid var(--border-light);
        }
        .mobile-menu .nav-link:last-child { border-bottom: none; }
        .mobile-menu .nav-cta {
            justify-content: center;
            margin-top: 8px;
            padding: 12px 20px;
        }

        /* ===== Hero ===== */
        .category-hero {
            position: relative;
            min-height: 60vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 140px 24px 80px;
            background: linear-gradient(135deg, rgba(26,58,92,0.88), rgba(15,36,64,0.92)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            color: #fff;
            overflow: hidden;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            bottom: 0; left: 0; right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg), transparent);
        }
        .category-hero .hero-content { position: relative; z-index: 2; max-width: 800px; }
        .category-hero h1 { color: #fff; font-size: 3.2rem; font-weight: 700; margin-bottom: 16px; text-shadow: 0 2px 12px rgba(0,0,0,0.2); }
        .category-hero p { color: rgba(255,255,255,0.8); font-size: 1.2rem; max-width: 600px; margin: 0 auto 32px; }
        .category-hero .hero-search {
            display: flex;
            max-width: 500px;
            margin: 0 auto;
            background: rgba(255,255,255,0.15);
            backdrop-filter: blur(8px);
            border-radius: 60px;
            padding: 4px;
            border: 1px solid rgba(255,255,255,0.2);
        }
        .category-hero .hero-search input {
            flex: 1;
            padding: 14px 20px;
            border: none;
            background: transparent;
            color: #fff;
            font-size: 1rem;
            outline: none;
            border-radius: 60px;
        }
        .category-hero .hero-search input::placeholder { color: rgba(255,255,255,0.5); }
        .category-hero .hero-search button {
            padding: 10px 24px;
            border-radius: 60px;
            background: var(--accent);
            color: #fff;
            font-weight: 600;
            transition: var(--transition);
        }
        .category-hero .hero-search button:hover { background: var(--accent-dark); }

        /* ===== 概览统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            max-width: 800px;
            margin: 0 auto;
        }
        .stat-item { text-align: center; padding: 24px 16px; }
        .stat-item .num { font-size: 2.8rem; font-weight: 700; color: var(--primary); line-height: 1.2; }
        .stat-item .label { font-size: 0.95rem; color: var(--text-light); margin-top: 4px; }

        /* ===== 登录方式卡片 ===== */
        .method-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .method-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid var(--border-light);
        }
        .method-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .method-card .card-img { height: 200px; overflow: hidden; }
        .method-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
        .method-card:hover .card-img img { transform: scale(1.04); }
        .method-card .card-body { padding: 24px 24px 28px; }
        .method-card .card-body h3 { font-size: 1.3rem; margin-bottom: 8px; }
        .method-card .card-body p { font-size: 0.95rem; color: var(--text-muted); margin-bottom: 16px; }
        .method-card .card-body .tag-group { display: flex; gap: 8px; flex-wrap: wrap; }
        .method-card .card-body .tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 500;
            background: var(--bg-alt);
            color: var(--text-light);
        }
        .method-card .card-body .tag.tag-accent { background: var(--accent-light); color: var(--accent-dark); }

        /* ===== 步骤流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 16px;
            counter-reset: step;
        }
        .step-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            position: relative;
        }
        .step-item:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
        .step-item::before {
            counter-increment: step;
            content: counter(step);
            display: block;
            width: 44px;
            height: 44px;
            line-height: 44px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 1.2rem;
            font-weight: 700;
            margin: 0 auto 16px;
        }
        .step-item h4 { font-size: 1.05rem; margin-bottom: 6px; color: var(--primary-dark); }
        .step-item p { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 0; }
        .step-arrow { display: flex; align-items: center; justify-content: center; font-size: 1.4rem; color: var(--accent); }

        /* ===== 安全提示 ===== */
        .safety-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .safety-item {
            display: flex;
            gap: 16px;
            background: var(--bg-card);
            padding: 24px 28px;
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            border-left: 4px solid var(--accent);
            transition: var(--transition);
        }
        .safety-item:hover { box-shadow: var(--shadow); }
        .safety-item .icon { font-size: 1.8rem; color: var(--accent); flex-shrink: 0; }
        .safety-item h4 { font-size: 1.05rem; margin-bottom: 4px; }
        .safety-item p { font-size: 0.92rem; color: var(--text-muted); margin-bottom: 0; }

        /* ===== FAQ ===== */
        .faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--border); }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-weight: 500;
            font-size: 1.05rem;
            color: var(--primary-dark);
            cursor: pointer;
            transition: var(--transition);
            background: none;
            width: 100%;
            text-align: left;
        }
        .faq-question i { transition: transform 0.3s ease; color: var(--accent); font-size: 1.1rem; }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer { max-height: 300px; padding: 0 24px 20px; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            background-blend-mode: overlay;
            color: #fff;
            text-align: center;
            padding: 80px 24px;
            border-radius: var(--radius);
            margin-bottom: -40px;
            position: relative;
        }
        .cta-section h2 { color: #fff; font-size: 2.2rem; margin-bottom: 12px; }
        .cta-section p { color: rgba(255,255,255,0.75); font-size: 1.1rem; max-width: 560px; margin: 0 auto 32px; }
        .cta-section .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            border-radius: 60px;
            background: var(--accent);
            color: #fff;
            font-weight: 600;
            font-size: 1.1rem;
            box-shadow: 0 6px 24px rgba(212,168,67,0.4);
            transition: var(--transition);
        }
        .cta-section .cta-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(212,168,67,0.5); }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255,255,255,0.7);
            padding: 60px 0 32px;
            margin-top: 80px;
        }
        .site-footer .container { padding: 0 24px; }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand .nav-logo { color: #fff; font-size: 1.4rem; border: none; padding-left: 0; margin-bottom: 12px; }
        .footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.5); max-width: 340px; line-height: 1.6; }
        .footer-col h4 { color: #fff; font-size: 1rem; margin-bottom: 16px; font-weight: 600; }
        .footer-col a {
            display: block;
            padding: 4px 0;
            font-size: 0.9rem;
            color: rgba(255,255,255,0.55);
            transition: var(--transition);
        }
        .footer-col a:hover { color: var(--accent-light); padding-left: 4px; }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 24px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
            flex-wrap: wrap;
            gap: 16px;
        }
        .footer-social { display: flex; gap: 16px; }
        .footer-social a {
            color: rgba(255,255,255,0.4);
            font-size: 1.2rem;
            transition: var(--transition);
        }
        .footer-social a:hover { color: var(--accent-light); transform: scale(1.05); }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .steps-grid { grid-template-columns: repeat(3, 1fr); }
            .step-arrow:nth-child(6), .step-arrow:nth-child(8) { display: none; }
        }
        @media (max-width: 768px) {
            .nav-links { display: none; }
            .nav-cta { display: none; }
            .nav-toggle { display: block; }
            .nav-dock { padding: 6px 16px 6px 20px; }
            .category-hero { min-height: 50vh; padding: 120px 20px 60px; }
            .category-hero h1 { font-size: 2.2rem; }
            .category-hero p { font-size: 1rem; }
            h2 { font-size: 1.8rem; }
            .section-padding { padding: 60px 0; }
            .stats-grid { grid-template-columns: repeat(3, 1fr); gap: 16px; }
            .stat-item .num { font-size: 2rem; }
            .method-grid { grid-template-columns: 1fr; }
            .steps-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
            .step-arrow { display: none; }
            .safety-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .cta-section h2 { font-size: 1.7rem; }
            .cta-section { padding: 60px 20px; }
        }
        @media (max-width: 520px) {
            .category-hero h1 { font-size: 1.7rem; }
            .nav-logo { font-size: 1.1rem; }
            .nav-logo i { font-size: 1.1rem; }
            .stats-grid { grid-template-columns: 1fr 1fr 1fr; gap: 8px; }
            .stat-item { padding: 12px 8px; }
            .stat-item .num { font-size: 1.5rem; }
            .steps-grid { grid-template-columns: 1fr; }
            .hero-search { flex-direction: column; border-radius: var(--radius-sm); }
            .hero-search input { border-radius: var(--radius-sm) var(--radius-sm) 0 0; }
            .hero-search button { border-radius: 0 0 var(--radius-sm) var(--radius-sm); }
        }

        /* ===== 工具类 ===== */
        .text-accent { color: var(--accent); }
        .bg-accent { background: var(--accent); }
        .border-accent { border-color: var(--accent); }
        .mt-0 { margin-top: 0; }
        .mb-0 { margin-bottom: 0; }