/* roulang page: index */
:root {
            --brand-500: #0c8ee7;
            --brand-600: #0070c4;
            --brand-700: #01599e;
            --accent-500: #d946ef;
            --warm-400: #fbbf24;
            --bg-cream: #fafaf9;
            --bg-soft: #f8fafc;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --border-light: #e2e8f0;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
            line-height: 1.6;
            color: var(--text-primary);
            background: #ffffff;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        @media (max-width: 640px) {
            .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }
        }

        .section-padding {
            padding-top: 5rem;
            padding-bottom: 5rem;
        }

        @media (max-width: 768px) {
            .section-padding {
                padding-top: 3rem;
                padding-bottom: 3rem;
            }
        }

        .section-title {
            font-size: 2.25rem;
            font-weight: 700;
            line-height: 1.2;
            letter-spacing: -0.02em;
            color: var(--text-primary);
        }

        .section-subtitle {
            font-size: 1.125rem;
            color: var(--text-secondary);
            max-width: 600px;
            margin-top: 0.75rem;
        }

        @media (max-width: 768px) {
            .section-title {
                font-size: 1.75rem;
            }
            .section-subtitle {
                font-size: 1rem;
            }
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 0.375rem;
            padding: 0.25rem 0.75rem;
            border-radius: 9999px;
            font-size: 0.8125rem;
            font-weight: 500;
            background: var(--bg-soft);
            color: var(--brand-600);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }

        .badge-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: #22c55e;
            display: inline-block;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 1.75rem;
            border-radius: 9999px;
            font-weight: 600;
            font-size: 0.9375rem;
            color: #fff;
            background: linear-gradient(135deg, var(--brand-500), var(--brand-600));
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            box-shadow: 0 4px 14px rgba(12, 142, 231, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(12, 142, 231, 0.35);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(12, 142, 231, 0.25);
        }

        .btn-primary:focus-visible {
            outline: 2px solid var(--brand-500);
            outline-offset: 3px;
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 1.75rem;
            border-radius: 9999px;
            font-weight: 600;
            font-size: 0.9375rem;
            color: var(--text-primary);
            background: #ffffff;
            border: 1.5px solid var(--border-light);
            cursor: pointer;
            transition: all var(--transition);
        }

        .btn-secondary:hover {
            border-color: var(--brand-500);
            color: var(--brand-600);
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }

        .btn-secondary:focus-visible {
            outline: 2px solid var(--brand-500);
            outline-offset: 3px;
        }

        .card {
            background: #ffffff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }

        .card:hover {
            box-shadow: var(--shadow-md);
            border-color: #cbd5e1;
            transform: translateY(-2px);
        }

        .card-img {
            border-radius: var(--radius-lg) var(--radius-lg) 0 0;
            overflow: hidden;
            aspect-ratio: 16/9;
            background: var(--bg-soft);
        }

        .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .card:hover .card-img img {
            transform: scale(1.03);
        }

        .tag {
            display: inline-block;
            padding: 0.2rem 0.65rem;
            border-radius: 9999px;
            font-size: 0.75rem;
            font-weight: 500;
            background: var(--bg-soft);
            color: var(--text-secondary);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }

        .tag:hover {
            border-color: var(--brand-500);
            color: var(--brand-600);
        }

        .tag-brand {
            background: rgba(12, 142, 231, 0.08);
            color: var(--brand-600);
            border-color: transparent;
        }

        .divider {
            width: 100%;
            height: 1px;
            background: var(--border-light);
            margin: 4rem 0;
        }

        .nav-link {
            position: relative;
            font-weight: 500;
            font-size: 0.9375rem;
            color: var(--text-secondary);
            padding: 0.5rem 0;
            transition: color var(--transition);
        }

        .nav-link:hover {
            color: var(--brand-600);
        }

        .nav-link.active {
            color: var(--brand-600);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 2.5px;
            background: var(--brand-500);
            border-radius: 2px;
        }

        .hero-gradient {
            background: linear-gradient(135deg, #f0f7ff 0%, #fdf4ff 40%, #fffbeb 100%);
        }

        .glow-dot {
            display: inline-block;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: #22c55e;
            box-shadow: 0 0 12px rgba(34, 197, 94, 0.5);
            animation: pulseSoft 2s ease-in-out infinite;
        }

        .stat-number {
            font-size: 2.75rem;
            font-weight: 800;
            line-height: 1;
            background: linear-gradient(135deg, var(--brand-500), var(--accent-500));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        @media (max-width: 640px) {
            .stat-number {
                font-size: 2rem;
            }
        }

        .process-node {
            position: relative;
            padding-left: 2.5rem;
        }

        .process-node::before {
            content: '';
            position: absolute;
            left: 0.75rem;
            top: 0.5rem;
            bottom: -1.5rem;
            width: 2px;
            background: linear-gradient(to bottom, var(--brand-500), rgba(12, 142, 231, 0.1));
        }

        .process-node:last-child::before {
            display: none;
        }

        .process-node .node-dot {
            position: absolute;
            left: 0.25rem;
            top: 0.5rem;
            width: 1rem;
            height: 1rem;
            border-radius: 50%;
            background: #fff;
            border: 2.5px solid var(--brand-500);
            z-index: 1;
        }

        .process-node.completed .node-dot {
            background: var(--brand-500);
            border-color: var(--brand-500);
        }

        .process-node.completed .node-dot::after {
            content: '✓';
            position: absolute;
            inset: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 0.6rem;
            font-weight: 700;
        }

        .faq-item {
            border-bottom: 1px solid var(--border-light);
            padding: 1.25rem 0;
        }

        .faq-item summary {
            font-weight: 600;
            font-size: 1.0625rem;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.25rem 0;
            list-style: none;
            transition: color var(--transition);
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 0.8125rem;
            color: var(--text-muted);
            transition: transform var(--transition);
        }

        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }

        .faq-item[open] summary {
            color: var(--brand-600);
        }

        .faq-item .faq-answer {
            padding-top: 0.75rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .cta-section {
            background: linear-gradient(135deg, #0b3f6d 0%, #01599e 40%, #0c8ee7 100%);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 20% 50%, rgba(217, 70, 239, 0.15) 0%, transparent 60%),
                        radial-gradient(ellipse at 80% 50%, rgba(251, 191, 36, 0.1) 0%, transparent 60%);
            pointer-events: none;
        }

        .footer-link {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: color var(--transition);
        }

        .footer-link:hover {
            color: #fff;
        }

        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-primary);
            cursor: pointer;
            padding: 0.25rem;
        }

        @media (max-width: 768px) {
            .mobile-menu-btn {
                display: block;
            }
            .nav-desktop {
                display: none;
            }
            .nav-mobile-open .nav-desktop {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: #fff;
                padding: 1.25rem;
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow-md);
                z-index: 50;
                gap: 0.75rem;
            }
            .nav-mobile-open .nav-desktop .nav-link {
                padding: 0.5rem 0;
            }
            .nav-mobile-open .nav-desktop .btn-primary {
                align-self: flex-start;
                margin-top: 0.5rem;
            }
        }

        @media (max-width: 640px) {
            .stat-grid {
                grid-template-columns: 1fr 1fr !important;
                gap: 1.5rem !important;
            }
        }

        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: 1.5rem;
        }

        @media (max-width: 640px) {
            .news-grid {
                grid-template-columns: 1fr;
            }
        }

        .service-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 1.5rem;
        }

        @media (max-width: 640px) {
            .service-grid {
                grid-template-columns: 1fr;
            }
        }

        .hero-title {
            font-size: clamp(2.2rem, 6vw, 4rem);
            font-weight: 800;
            line-height: 1.1;
            letter-spacing: -0.03em;
        }

        .hero-desc {
            font-size: clamp(1rem, 2vw, 1.2rem);
            color: var(--text-secondary);
            max-width: 560px;
            line-height: 1.7;
        }

        .brand-path-item {
            display: flex;
            align-items: flex-start;
            gap: 1rem;
            padding: 1.25rem;
            border-radius: var(--radius-md);
            background: #fff;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }

        .brand-path-item:hover {
            border-color: var(--brand-500);
            box-shadow: var(--shadow-md);
        }

        .brand-path-item .path-icon {
            flex-shrink: 0;
            width: 2.5rem;
            height: 2.5rem;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(12, 142, 231, 0.08);
            color: var(--brand-600);
            font-size: 1.125rem;
        }

        .explore-card {
            position: relative;
            border-radius: var(--radius-xl);
            overflow: hidden;
            aspect-ratio: 4/3;
            background: var(--bg-soft);
            cursor: pointer;
            transition: all var(--transition);
        }

        .explore-card img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

        .explore-card:hover img {
            transform: scale(1.05);
        }

        .explore-card .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, transparent 60%);
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 1.75rem;
            color: #fff;
        }

        .explore-card .overlay h3 {
            font-size: 1.25rem;
            font-weight: 700;
        }

        .explore-card .overlay p {
            font-size: 0.9rem;
            opacity: 0.85;
            margin-top: 0.25rem;
        }

/* roulang page: article */
:root {
            --brand: #007fff;
            --accent: #ff7d0a;
            --bg: #f8fafc;
            --text: #0f172a;
            --muted: #64748b;
            --border: #e2e8f0;
            --radius: 0.75rem;
            --shadow: 0 2px 12px rgba(0,0,0,0.06);
            --shadow-hover: 0 8px 30px rgba(0,0,0,0.10);
            --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
        }
        *,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
        html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
        body{font-family:'Inter','Noto Sans SC',system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);line-height:1.7;font-size:1rem}
        img{max-width:100%;height:auto;display:block}
        a{color:inherit;text-decoration:none;transition:var(--transition)}
        button{cursor:pointer;border:none;background:transparent;font:inherit}
        input,textarea{font:inherit;border:1px solid var(--border);border-radius:var(--radius);padding:0.6rem 1rem;outline:none;transition:var(--transition);background:#fff;width:100%}
        input:focus,textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(0,127,255,0.12)}
        .container{max-width:1200px;margin:0 auto;padding:0 1.5rem}
        .section-padding{padding:4.5rem 0}
        @media(max-width:768px){.section-padding{padding:3rem 0}.container{padding:0 1rem}}
        .nav-link{position:relative;font-size:0.95rem;font-weight:500;color:#374151;padding:0.25rem 0;transition:var(--transition)}
        .nav-link::after{content:'';position:absolute;bottom:-2px;left:0;width:0;height:2px;background:linear-gradient(90deg,var(--brand),var(--accent));border-radius:2px;transition:var(--transition)}
        .nav-link:hover{color:var(--brand)}.nav-link:hover::after{width:100%}
        .nav-link.active{color:var(--brand)}.nav-link.active::after{width:100%}
        .btn-primary{display:inline-flex;align-items:center;gap:0.5rem;background:linear-gradient(135deg,var(--brand),#0068cc);color:#fff;padding:0.7rem 1.6rem;border-radius:9999px;font-weight:600;font-size:0.95rem;transition:var(--transition);box-shadow:0 4px 14px rgba(0,127,255,0.25)}
        .btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,127,255,0.35);background:linear-gradient(135deg,#0068cc,var(--brand))}
        .btn-primary:active{transform:translateY(0)}
        .btn-outline{display:inline-flex;align-items:center;gap:0.5rem;border:2px solid var(--brand);color:var(--brand);padding:0.6rem 1.5rem;border-radius:9999px;font-weight:600;font-size:0.95rem;transition:var(--transition);background:transparent}
        .btn-outline:hover{background:var(--brand);color:#fff;transform:translateY(-2px);box-shadow:0 6px 20px rgba(0,127,255,0.20)}
        .badge{display:inline-flex;align-items:center;gap:0.35rem;padding:0.25rem 0.75rem;border-radius:9999px;font-size:0.75rem;font-weight:500;background:#f1f5f9;color:#475569}
        .badge-brand{background:rgba(0,127,255,0.10);color:var(--brand)}
        .badge-accent{background:rgba(255,125,10,0.10);color:var(--accent)}
        .glow-dot{display:inline-block;width:0.5rem;height:0.5rem;border-radius:50%;background:#22c55e;animation:pulse-dot 2s ease-in-out infinite}
        @keyframes pulse-dot{0%,100%{opacity:1;transform:scale(1)}50%{opacity:0.6;transform:scale(0.85)}}
        .card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid rgba(226,232,240,0.6);padding:1.5rem;transition:var(--transition)}
        .card:hover{box-shadow:var(--shadow-hover);transform:translateY(-3px)}
        .card-sm{padding:1rem}
        .section-title{font-size:2rem;font-weight:800;line-height:1.25;letter-spacing:-0.02em;color:var(--text);margin-bottom:0.75rem}
        .section-subtitle{font-size:1.05rem;color:var(--muted);max-width:600px;margin-bottom:2.5rem}
        @media(max-width:768px){.section-title{font-size:1.6rem}.section-subtitle{font-size:0.95rem}}
        .footer-link{color:#94a3b8;transition:var(--transition);font-size:0.9rem}
        .footer-link:hover{color:#fff;padding-left:4px}
        .article-body{font-size:1.05rem;line-height:1.9;color:#1e293b}
        .article-body p{margin-bottom:1.5rem}
        .article-body h2{font-size:1.5rem;font-weight:700;margin:2rem 0 1rem;color:var(--text)}
        .article-body h3{font-size:1.2rem;font-weight:600;margin:1.5rem 0 0.75rem;color:var(--text)}
        .article-body ul,.article-body ol{margin-bottom:1.5rem;padding-left:1.5rem}
        .article-body li{margin-bottom:0.4rem}
        .article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:2px}
        .article-body a:hover{color:#0068cc}
        .article-body blockquote{border-left:4px solid var(--brand);background:#f1f5f9;padding:1rem 1.5rem;margin:1.5rem 0;border-radius:0 var(--radius) var(--radius) 0;color:#334155}
        .article-body img{border-radius:var(--radius);margin:1.5rem auto}
        .article-body pre{background:#0f172a;color:#e2e8f0;padding:1.25rem;border-radius:var(--radius);overflow-x:auto;font-size:0.9rem;margin:1.5rem 0}
        .article-body code{background:#f1f5f9;padding:0.2rem 0.4rem;border-radius:4px;font-size:0.9em;color:#e11d48}
        .article-body pre code{background:transparent;padding:0;color:inherit}
        .mobile-menu-btn{display:none;padding:0.5rem;font-size:1.4rem;color:#374151;transition:var(--transition)}
        .mobile-menu-btn:hover{color:var(--brand)}
        @media(max-width:768px){.nav-desktop{display:none}.mobile-menu-btn{display:block}}
        .breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:0.4rem;font-size:0.9rem;color:var(--muted);margin-bottom:1.5rem}
        .breadcrumb a{color:var(--brand)}.breadcrumb a:hover{text-decoration:underline}
        .breadcrumb .sep{color:#94a3b8}
        .tag{display:inline-block;padding:0.2rem 0.8rem;border-radius:9999px;font-size:0.8rem;background:#f1f5f9;color:#475569;transition:var(--transition);border:1px solid transparent}
        .tag:hover{background:var(--brand);color:#fff;border-color:var(--brand)}
        .post-nav{display:flex;flex-wrap:wrap;gap:1rem;justify-content:space-between;padding-top:1.5rem;border-top:1px solid var(--border)}
        .post-nav a{flex:1;min-width:200px;padding:1rem;border-radius:var(--radius);border:1px solid var(--border);transition:var(--transition);background:#fff}
        .post-nav a:hover{border-color:var(--brand);box-shadow:var(--shadow);transform:translateY(-2px)}
        .post-nav .label{font-size:0.8rem;color:var(--muted);margin-bottom:0.25rem}
        .post-nav .title{font-weight:600;color:var(--text);font-size:0.95rem}
        @media(max-width:640px){.post-nav{flex-direction:column}.post-nav a{min-width:auto}}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --brand-50: #eef2ff;
            --brand-100: #e0e7ff;
            --brand-200: #c7d2fe;
            --brand-300: #a5b4fc;
            --brand-400: #818cf8;
            --brand-500: #6366f1;
            --brand-600: #4f46e5;
            --brand-700: #4338ca;
            --brand-800: #3730a3;
            --brand-900: #312e81;
            --accent-50: #fdf4ff;
            --accent-100: #fae8ff;
            --accent-200: #f5d0fe;
            --accent-300: #f0abfc;
            --accent-400: #e879f9;
            --accent-500: #d946ef;
            --accent-600: #c026d3;
            --gray-50: #f9fafb;
            --gray-100: #f3f4f6;
            --gray-200: #e5e7eb;
            --gray-300: #d1d5db;
            --gray-400: #9ca3af;
            --gray-500: #6b7280;
            --gray-600: #4b5563;
            --gray-700: #374151;
            --gray-800: #1f2937;
            --gray-900: #111827;
            --gray-950: #0b0f1a;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.05);
            --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.07);
            --shadow-xl: 0 20px 48px rgba(0, 0, 0, 0.08);
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            margin: 0;
            padding: 0;
            font-family: 'Inter', 'Noto Sans SC', system-ui, sans-serif;
            line-height: 1.7;
            color: var(--gray-800);
            background: #ffffff;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s ease;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
            padding: 0;
        }
        :focus-visible {
            outline: 2px solid var(--brand-500);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ===== Utility ===== */
        .container {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }
        @media (min-width: 768px) {
            .container {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }
        @media (min-width: 1024px) {
            .container {
                padding-left: 2.5rem;
                padding-right: 2.5rem;
            }
        }

        .section-padding {
            padding-top: 5rem;
            padding-bottom: 5rem;
        }
        @media (min-width: 768px) {
            .section-padding {
                padding-top: 6.5rem;
                padding-bottom: 6.5rem;
            }
        }
        @media (min-width: 1024px) {
            .section-padding {
                padding-top: 8rem;
                padding-bottom: 8rem;
            }
        }

        .section-title {
            font-size: 1.75rem;
            font-weight: 800;
            line-height: 1.25;
            color: var(--gray-900);
            letter-spacing: -0.02em;
        }
        @media (min-width: 768px) {
            .section-title {
                font-size: 2.25rem;
            }
        }
        @media (min-width: 1024px) {
            .section-title {
                font-size: 2.75rem;
            }
        }

        .section-subtitle {
            font-size: 1rem;
            color: var(--gray-500);
            max-width: 600px;
            line-height: 1.7;
        }
        @media (min-width: 768px) {
            .section-subtitle {
                font-size: 1.125rem;
            }
        }

        /* ===== 导航 ===== */
        #site-header {
            transition: box-shadow 0.3s ease, background 0.3s ease;
        }
        #site-header.scrolled {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            background: rgba(255, 255, 255, 0.98) !important;
        }

        .nav-link {
            position: relative;
            font-size: 0.925rem;
            font-weight: 500;
            color: var(--gray-600);
            padding: 0.375rem 0.125rem;
            transition: color 0.25s ease;
            letter-spacing: 0.01em;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(to right, var(--brand-500), var(--accent-500));
            border-radius: 2px;
            transition: width 0.3s ease;
        }
        .nav-link:hover {
            color: var(--brand-700);
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .nav-link.active {
            color: var(--brand-700);
            font-weight: 600;
        }
        .nav-link.active::after {
            width: 100%;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: linear-gradient(135deg, var(--brand-600), var(--brand-700));
            color: #fff !important;
            font-weight: 600;
            padding: 0.625rem 1.5rem;
            border-radius: 9999px;
            transition: all 0.3s ease;
            box-shadow: 0 4px 14px rgba(79, 70, 229, 0.25);
            border: none;
            font-size: 0.875rem;
            line-height: 1.5;
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(79, 70, 229, 0.35);
            background: linear-gradient(135deg, var(--brand-500), var(--brand-700));
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(79, 70, 229, 0.2);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            border: 2px solid var(--brand-200);
            color: var(--brand-700);
            font-weight: 600;
            padding: 0.5rem 1.375rem;
            border-radius: 9999px;
            transition: all 0.3s ease;
            background: transparent;
            font-size: 0.875rem;
        }
        .btn-outline:hover {
            border-color: var(--brand-500);
            background: var(--brand-50);
            transform: translateY(-1px);
        }

        .btn-white {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: #fff;
            color: var(--brand-700) !important;
            font-weight: 600;
            padding: 0.625rem 1.5rem;
            border-radius: 9999px;
            transition: all 0.3s ease;
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
            font-size: 0.875rem;
        }
        .btn-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
        }

        /* ===== Badge ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 0.375rem;
            padding: 0.25rem 0.75rem;
            border-radius: 9999px;
            font-size: 0.75rem;
            font-weight: 500;
            line-height: 1.4;
        }
        .badge-brand {
            background: rgba(79, 70, 229, 0.08);
            color: var(--brand-700);
            border: 1px solid rgba(79, 70, 229, 0.12);
        }
        .badge-accent {
            background: rgba(217, 70, 239, 0.08);
            color: var(--accent-700);
            border: 1px solid rgba(217, 70, 239, 0.12);
        }
        .badge-gray {
            background: var(--gray-100);
            color: var(--gray-600);
            border: 1px solid var(--gray-200);
        }
        .badge-white {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.2);
            backdrop-filter: blur(4px);
        }

        .glow-dot {
            display: inline-block;
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: #22c55e;
            box-shadow: 0 0 8px rgba(34, 197, 94, 0.5);
            animation: pulse-dot 2s infinite;
        }
        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.6;
                transform: scale(0.85);
            }
        }

        /* ===== 卡片 ===== */
        .card {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            border: 1px solid var(--gray-100);
            transition: all 0.35s ease;
            overflow: hidden;
        }
        .card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: var(--brand-100);
        }

        .card-glass {
            background: rgba(255, 255, 255, 0.7);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.3);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            transition: all 0.35s ease;
        }
        .card-glass:hover {
            background: rgba(255, 255, 255, 0.85);
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
        }

        .card-dark {
            background: rgba(15, 23, 42, 0.85);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-lg);
            transition: all 0.35s ease;
        }
        .card-dark:hover {
            border-color: rgba(255, 255, 255, 0.12);
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
        }

        /* ===== 节点卡 / 路径 ===== */
        .node-card {
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
            padding: 1.5rem;
            background: #fff;
            border-radius: var(--radius-md);
            border-left: 4px solid var(--brand-400);
            box-shadow: var(--shadow-sm);
            transition: all 0.3s ease;
            position: relative;
        }
        .node-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateX(4px);
            border-left-color: var(--brand-600);
        }
        .node-card .node-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--brand-200);
            line-height: 1;
            letter-spacing: -0.04em;
        }
        .node-card .node-title {
            font-size: 1.125rem;
            font-weight: 700;
            color: var(--gray-900);
        }
        .node-card .node-desc {
            font-size: 0.875rem;
            color: var(--gray-500);
            line-height: 1.6;
        }

        /* ===== 进度条 ===== */
        .progress-track {
            position: relative;
            display: flex;
            align-items: flex-start;
            gap: 1rem;
        }
        .progress-track::before {
            content: '';
            position: absolute;
            left: 1.125rem;
            top: 2.5rem;
            bottom: 0.5rem;
            width: 2px;
            background: linear-gradient(to bottom, var(--brand-200), var(--accent-200));
            border-radius: 2px;
        }
        .progress-step {
            display: flex;
            gap: 1.25rem;
            padding-bottom: 2rem;
            position: relative;
            flex: 1;
        }
        .progress-step:last-child {
            padding-bottom: 0;
        }
        .progress-step .step-dot {
            width: 2.5rem;
            height: 2.5rem;
            min-width: 2.5rem;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.875rem;
            color: #fff;
            background: linear-gradient(135deg, var(--brand-500), var(--brand-600));
            box-shadow: 0 4px 12px rgba(79, 70, 229, 0.25);
            position: relative;
            z-index: 1;
        }
        .progress-step .step-content {
            flex: 1;
            padding-top: 0.25rem;
        }
        .progress-step .step-title {
            font-weight: 700;
            color: var(--gray-900);
            font-size: 1.05rem;
        }
        .progress-step .step-desc {
            font-size: 0.875rem;
            color: var(--gray-500);
            line-height: 1.6;
            margin-top: 0.25rem;
        }

        /* ===== 统计数字 ===== */
        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            line-height: 1.1;
            letter-spacing: -0.03em;
            color: var(--gray-900);
        }
        .stat-label {
            font-size: 0.875rem;
            color: var(--gray-500);
            margin-top: 0.25rem;
        }
        @media (min-width: 768px) {
            .stat-number {
                font-size: 3rem;
            }
        }

        /* ===== FAQ ===== */
        .faq-item {
            border-bottom: 1px solid var(--gray-100);
            padding: 1.25rem 0;
            transition: all 0.25s ease;
        }
        .faq-item:first-child {
            padding-top: 0;
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            font-weight: 600;
            font-size: 1.025rem;
            color: var(--gray-800);
            cursor: pointer;
            padding: 0.25rem 0;
            transition: color 0.2s ease;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
        }
        .faq-question:hover {
            color: var(--brand-700);
        }
        .faq-question .faq-icon {
            font-size: 0.875rem;
            color: var(--gray-400);
            transition: transform 0.3s ease, color 0.2s ease;
            flex-shrink: 0;
        }
        .faq-item.open .faq-question .faq-icon {
            transform: rotate(45deg);
            color: var(--brand-500);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            color: var(--gray-500);
            font-size: 0.925rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding-top: 0.75rem;
        }

        /* ===== Footer ===== */
        .footer-link {
            color: var(--gray-500);
            transition: color 0.25s ease, padding-left 0.25s ease;
            display: inline-block;
            font-size: 0.875rem;
        }
        .footer-link:hover {
            color: #fff;
            padding-left: 4px;
        }

        /* ===== 移动端菜单 ===== */
        .mobile-menu-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 2.5rem;
            height: 2.5rem;
            border-radius: var(--radius-sm);
            color: var(--gray-700);
            font-size: 1.25rem;
            transition: background 0.2s ease;
            background: none;
            border: none;
        }
        .mobile-menu-btn:hover {
            background: var(--gray-100);
        }
        @media (min-width: 768px) {
            .mobile-menu-btn {
                display: none;
            }
            .nav-desktop {
                display: flex !important;
            }
            #mobile-nav {
                display: none !important;
            }
        }
        @media (max-width: 767.98px) {
            .nav-desktop {
                display: none !important;
            }
            #mobile-nav {
                width: 100%;
            }
            #mobile-nav .nav-link {
                font-size: 1rem !important;
                padding: 0.5rem 0;
            }
        }

        /* ===== 宽幅视觉 ===== */
        .hero-visual {
            position: relative;
            overflow: hidden;
            background: linear-gradient(135deg, #0b0f1a 0%, #1a1040 40%, #1e1b4b 70%, #0f172a 100%);
        }
        .hero-visual::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 20% 50%, rgba(79, 70, 229, 0.12) 0%, transparent 60%),
                radial-gradient(ellipse at 80% 30%, rgba(217, 70, 239, 0.08) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 80%, rgba(99, 102, 241, 0.06) 0%, transparent 40%);
            pointer-events: none;
        }
        .hero-visual .grid-pattern {
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
            background-size: 48px 48px;
            pointer-events: none;
        }

        /* ===== 区域标签 ===== */
        .region-tag {
            display: inline-flex;
            align-items: center;
            gap: 0.375rem;
            padding: 0.25rem 0.75rem 0.25rem 0.5rem;
            border-radius: 9999px;
            font-size: 0.75rem;
            font-weight: 500;
            background: rgba(79, 70, 229, 0.06);
            color: var(--brand-700);
            border: 1px solid rgba(79, 70, 229, 0.1);
        }
        .region-tag i {
            font-size: 0.625rem;
            opacity: 0.7;
        }

        /* ===== 任务清单 ===== */
        .task-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .task-list li {
            display: flex;
            align-items: flex-start;
            gap: 0.75rem;
            padding: 0.5rem 0;
            font-size: 0.925rem;
            color: var(--gray-700);
        }
        .task-list li i {
            color: var(--brand-500);
            font-size: 0.875rem;
            margin-top: 0.25rem;
            flex-shrink: 0;
        }

        /* ===== 装饰 ===== */
        .gradient-text {
            background: linear-gradient(135deg, var(--brand-600), var(--accent-500));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .gradient-border {
            border-image: linear-gradient(135deg, var(--brand-400), var(--accent-400)) 1;
        }

        .bg-soft-gradient {
            background: linear-gradient(180deg, var(--gray-50) 0%, #fff 100%);
        }
        .bg-brand-soft {
            background: linear-gradient(135deg, rgba(79, 70, 229, 0.04) 0%, rgba(217, 70, 239, 0.03) 100%);
        }

        /* ===== 响应式断点补充 ===== */
        @media (max-width: 639.98px) {
            .section-title {
                font-size: 1.5rem;
            }
            .section-padding {
                padding-top: 3.5rem;
                padding-bottom: 3.5rem;
            }
            .stat-number {
                font-size: 2rem;
            }
            .hero-visual {
                min-height: 70vh;
            }
            .card {
                border-radius: var(--radius-md);
            }
            .node-card {
                padding: 1.125rem;
            }
            .progress-step .step-dot {
                width: 2rem;
                height: 2rem;
                min-width: 2rem;
                font-size: 0.75rem;
            }
            .progress-track::before {
                left: 0.875rem;
            }
        }

        @media (min-width: 640px) and (max-width: 767.98px) {
            .section-title {
                font-size: 1.75rem;
            }
            .hero-visual {
                min-height: 65vh;
            }
        }

        @media (min-width: 768px) and (max-width: 1023.98px) {
            .section-title {
                font-size: 2rem;
            }
            .hero-visual {
                min-height: 60vh;
            }
        }

        @media (min-width: 1024px) {
            .hero-visual {
                min-height: 75vh;
            }
        }

        /* ===== 滚动动画 ===== */
        .reveal {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.7s ease, transform 0.7s ease;
        }
        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }
        .reveal-delay-1 {
            transition-delay: 0.1s;
        }
        .reveal-delay-2 {
            transition-delay: 0.2s;
        }
        .reveal-delay-3 {
            transition-delay: 0.3s;
        }
        .reveal-delay-4 {
            transition-delay: 0.4s;
        }