/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --color-deep-space: #0B0E1A;
            --color-panel-bg: #111527;
            --color-glass-bg: rgba(255, 255, 255, 0.05);
            --color-glass-border: rgba(255, 255, 255, 0.08);
            --color-brand-primary: #6C5CE7;
            --color-brand-hover: #7D6FF0;
            --color-brand-active: #5A4DD0;
            --color-cyan-glow: #00D4FF;
            --color-amber-accent: #FFB347;
            --color-text-primary: #EAEDF5;
            --color-text-secondary: #9AA3B8;
            --color-text-disabled: #5A6378;
            --color-disabled-bg: #3A3D52;
            --glass-blur: 12px;
            --glass-radius: 16px;
            --btn-radius: 8px;
            --btn-glow: 0 0 20px rgba(108, 92, 231, 0.4);
            --transition-standard: 0.3s ease;
            --max-container: 1280px;
            --nav-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
            background-color: var(--color-deep-space);
            color: var(--color-text-primary);
            line-height: 1.6;
            font-size: 1rem;
            min-height: 100vh;
        }
        a { color: var(--color-cyan-glow); text-decoration: none; transition: color var(--transition-standard); }
        a:hover { color: var(--color-brand-hover); }
        a:focus-visible { outline: 2px solid var(--color-cyan-glow); outline-offset: 2px; border-radius: 4px; }
        img { max-width: 100%; height: auto; display: block; border-radius: 8px; }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { font-weight: 600; line-height: 1.3; color: var(--color-text-primary); }

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

        /* ===== Utility ===== */
        .section-padding { padding: 80px 0; }
        @media (max-width: 768px) { .section-padding { padding: 48px 0; } }
        .text-center { text-align: center; }
        .text-secondary { color: var(--color-text-secondary); }
        .section-title {
            font-size: 2rem;
            font-weight: 600;
            margin-bottom: 48px;
            text-align: center;
            letter-spacing: -0.01em;
        }
        @media (max-width: 768px) { .section-title { font-size: 1.6rem; margin-bottom: 32px; } }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(11, 14, 26, 0.85);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: background var(--transition-standard);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .site-logo {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--color-text-primary);
            letter-spacing: 0.02em;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .site-logo i { color: var(--color-brand-primary); font-size: 1.5rem; }
        .site-logo span { background: linear-gradient(135deg, var(--color-brand-primary), var(--color-cyan-glow)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .site-logo:hover { color: var(--color-text-primary); }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: 6px;
            color: var(--color-text-secondary);
            font-size: 0.95rem;
            font-weight: 500;
            transition: all var(--transition-standard);
            position: relative;
        }
        .nav-list a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 2px;
            background: var(--color-cyan-glow);
            border-radius: 2px;
            transition: width var(--transition-standard);
        }
        .nav-list a:hover { color: var(--color-text-primary); }
        .nav-list a:hover::after { width: 60%; }
        .nav-list a.active { color: var(--color-cyan-glow); }
        .nav-list a.active::after { width: 60%; background: var(--color-cyan-glow); }

        /* Mega Menu Trigger */
        .mega-trigger {
            position: relative;
            cursor: pointer;
        }
        .mega-trigger > a i { font-size: 0.75rem; margin-left: 4px; transition: transform var(--transition-standard); }
        .mega-trigger:hover > a i { transform: rotate(180deg); }

        .mega-panel {
            position: absolute;
            top: calc(100% + 12px);
            left: 50%;
            transform: translateX(-50%) translateY(8px);
            background: var(--color-panel-bg);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--color-glass-border);
            border-radius: var(--glass-radius);
            padding: 24px;
            min-width: 420px;
            opacity: 0;
            visibility: hidden;
            transition: all 0.25s ease;
            box-shadow: 0 16px 48px rgba(0,0,0,0.5);
            z-index: 100;
        }
        .mega-trigger:hover .mega-panel {
            opacity: 1;
            visibility: visible;
            transform: translateX(-50%) translateY(0);
        }
        .mega-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }
        .mega-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: 10px;
            background: rgba(255,255,255,0.03);
            border: 1px solid transparent;
            transition: all var(--transition-standard);
            cursor: pointer;
        }
        .mega-item:hover {
            background: rgba(255,255,255,0.06);
            border-color: var(--color-glass-border);
            transform: translateY(-2px);
        }
        .mega-item i { font-size: 1.4rem; color: var(--color-brand-primary); width: 36px; text-align: center; }
        .mega-item span { font-size: 0.9rem; font-weight: 500; color: var(--color-text-primary); }

        /* Mobile nav */
        .nav-toggle { display: none; background: none; border: none; color: var(--color-text-primary); font-size: 1.5rem; cursor: pointer; padding: 8px; }
        @media (max-width: 768px) {
            .nav-toggle { display: block; }
            .nav-list {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                bottom: 0;
                background: rgba(11, 14, 26, 0.97);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                align-items: center;
                justify-content: flex-start;
                padding: 40px 24px;
                gap: 12px;
                transform: translateX(100%);
                transition: transform 0.35s ease;
                overflow-y: auto;
            }
            .nav-list.open { transform: translateX(0); }
            .nav-list a { font-size: 1.15rem; padding: 14px 24px; width: 100%; max-width: 360px; justify-content: center; }
            .nav-list a::after { display: none; }
            .mega-panel {
                position: static;
                transform: none;
                opacity: 1;
                visibility: visible;
                min-width: auto;
                padding: 16px;
                margin-top: 8px;
                background: rgba(255,255,255,0.03);
                border: 1px solid var(--color-glass-border);
                box-shadow: none;
                display: none;
            }
            .mega-trigger:hover .mega-panel { display: block; transform: none; }
            .mega-grid { grid-template-columns: 1fr; gap: 8px; }
        }

        /* ===== Hero / KV ===== */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(160deg, #0B0E1A 0%, #111527 50%, #0F1325 100%);
            position: relative;
            overflow: hidden;
            padding: calc(var(--nav-height) + 40px) 24px 80px;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(108,92,231,0.15) 0%, transparent 70%);
            pointer-events: none;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: -20%;
            left: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0,212,255,0.1) 0%, transparent 70%);
            pointer-events: none;
        }
        .hero-bg {
            position: absolute;
            top: 0; left: 0; right: 0; bottom: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.15;
            pointer-events: none;
        }
        .hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 860px;
        }
        .hero h1 {
            font-size: 2.75rem;
            font-weight: 700;
            letter-spacing: -0.01em;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #EAEDF5 0%, #C5CBE0 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero .subtitle {
            font-size: 1.2rem;
            color: var(--color-text-secondary);
            margin-bottom: 36px;
            line-height: 1.7;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .hero-actions .btn { min-width: 180px; }
        .hero .scroll-indicator {
            position: absolute;
            bottom: 32px;
            left: 50%;
            transform: translateX(-50%);
            color: var(--color-text-disabled);
            font-size: 0.85rem;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 6px;
            animation: float 2s ease-in-out infinite;
        }
        .hero .scroll-indicator i { font-size: 1.2rem; }
        @keyframes float { 0%,100% { transform: translateX(-50%) translateY(0); } 50% { transform: translateX(-50%) translateY(8px); } }
        @media (max-width: 768px) {
            .hero h1 { font-size: 1.8rem; }
            .hero .subtitle { font-size: 1rem; }
            .hero-actions .btn { min-width: 140px; }
        }
        @media (max-width: 480px) {
            .hero h1 { font-size: 1.5rem; }
            .hero-actions { flex-direction: column; align-items: center; }
            .hero-actions .btn { width: 100%; max-width: 280px; }
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: var(--btn-radius);
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            cursor: pointer;
            transition: all var(--transition-standard);
            text-decoration: none;
            line-height: 1.2;
        }
        .btn:focus-visible { outline: 2px solid var(--color-cyan-glow); outline-offset: 2px; }
        .btn-primary {
            background: var(--color-brand-primary);
            color: #fff;
            box-shadow: var(--btn-glow);
        }
        .btn-primary:hover {
            background: var(--color-brand-hover);
            box-shadow: 0 0 30px rgba(108, 92, 231, 0.6), 0 0 60px rgba(108, 92, 231, 0.15);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-primary:active { background: var(--color-brand-active); box-shadow: none; transform: translateY(0); }
        .btn-secondary {
            background: rgba(255,255,255,0.06);
            color: var(--color-text-primary);
            border: 1px solid var(--color-glass-border);
        }
        .btn-secondary:hover {
            background: rgba(255,255,255,0.1);
            border-color: rgba(255,255,255,0.2);
            transform: translateY(-2px);
            color: var(--color-text-primary);
        }
        .btn-amber {
            background: var(--color-amber-accent);
            color: #1A1A2E;
            box-shadow: 0 0 20px rgba(255, 179, 71, 0.3);
        }
        .btn-amber:hover {
            background: #FFC266;
            box-shadow: 0 0 30px rgba(255, 179, 71, 0.5);
            transform: translateY(-2px);
            color: #1A1A2E;
        }
        .btn-ghost {
            background: transparent;
            color: var(--color-text-secondary);
            border: 1px solid var(--color-glass-border);
        }
        .btn-ghost:hover { background: rgba(255,255,255,0.04); color: var(--color-text-primary); }
        .btn-lg { padding: 16px 48px; font-size: 1.1rem; border-radius: 24px; }
        @media (max-width: 480px) { .btn-lg { padding: 14px 32px; font-size: 1rem; width: 100%; } }

        /* ===== Glass Card ===== */
        .glass-card {
            background: var(--color-glass-bg);
            backdrop-filter: blur(var(--glass-blur));
            -webkit-backdrop-filter: blur(var(--glass-blur));
            border: 1px solid var(--color-glass-border);
            border-radius: var(--glass-radius);
            padding: 24px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
            transition: all var(--transition-standard);
        }
        .glass-card:hover {
            border-color: rgba(108, 92, 231, 0.3);
            transform: translateY(-4px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
        }

        /* ===== Timeline ===== */
        .timeline-section {
            background: var(--color-panel-bg);
        }
        .timeline {
            position: relative;
            max-width: 800px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .timeline::before {
            content: '';
            position: absolute;
            top: 0;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 3px;
            background: linear-gradient(to bottom, var(--color-brand-primary), var(--color-cyan-glow));
            border-radius: 3px;
        }
        .timeline-item {
            display: flex;
            align-items: flex-start;
            margin-bottom: 40px;
            position: relative;
        }
        .timeline-item:nth-child(odd) { flex-direction: row; }
        .timeline-item:nth-child(even) { flex-direction: row-reverse; }
        .timeline-content {
            width: calc(50% - 40px);
            background: var(--color-glass-bg);
            backdrop-filter: blur(var(--glass-blur));
            -webkit-backdrop-filter: blur(var(--glass-blur));
            border: 1px solid var(--color-glass-border);
            border-radius: 12px;
            padding: 20px 24px;
            transition: all var(--transition-standard);
        }
        .timeline-content:hover {
            border-color: rgba(108, 92, 231, 0.3);
            transform: translateY(-2px);
        }
        .timeline-time {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--color-cyan-glow);
            margin-bottom: 4px;
        }
        .timeline-title {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 4px;
        }
        .timeline-desc {
            font-size: 0.88rem;
            color: var(--color-text-secondary);
        }
        .timeline-dot {
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            width: 18px;
            height: 18px;
            border-radius: 50%;
            background: var(--color-brand-primary);
            border: 3px solid var(--color-deep-space);
            box-shadow: 0 0 12px rgba(108, 92, 231, 0.5);
            z-index: 2;
            top: 24px;
        }
        @media (max-width: 768px) {
            .timeline::before { left: 20px; }
            .timeline-item, .timeline-item:nth-child(even) { flex-direction: row; padding-left: 48px; }
            .timeline-content { width: 100%; }
            .timeline-dot { left: 20px; }
        }
        @media (max-width: 480px) {
            .timeline-content { padding: 16px; }
            .timeline-time { font-size: 1.1rem; }
        }

        /* ===== Speakers / Guests ===== */
        .speakers-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .speaker-card {
            text-align: center;
            padding: 32px 20px 24px;
        }
        .speaker-avatar {
            width: 96px;
            height: 96px;
            border-radius: 50%;
            margin: 0 auto 16px;
            background: linear-gradient(135deg, var(--color-brand-primary), var(--color-cyan-glow));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2.4rem;
            color: #fff;
            font-weight: 700;
            box-shadow: 0 0 24px rgba(108, 92, 231, 0.2);
        }
        .speaker-avatar img { width: 100%; height: 100%; border-radius: 50%; object-fit: cover; }
        .speaker-name {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 4px;
        }
        .speaker-role {
            font-size: 0.85rem;
            color: var(--color-text-secondary);
            display: inline-block;
            background: rgba(108, 92, 231, 0.15);
            padding: 2px 14px;
            border-radius: 20px;
            margin-top: 4px;
        }
        @media (max-width: 1024px) { .speakers-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 480px) { .speakers-grid { grid-template-columns: 1fr; } }

        /* ===== Ticket Compare ===== */
        .ticket-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            align-items: stretch;
        }
        .ticket-card {
            position: relative;
            padding: 32px 24px;
            text-align: center;
            display: flex;
            flex-direction: column;
            border-radius: var(--glass-radius);
            background: var(--color-glass-bg);
            backdrop-filter: blur(var(--glass-blur));
            -webkit-backdrop-filter: blur(var(--glass-blur));
            border: 1px solid var(--color-glass-border);
            transition: all var(--transition-standard);
        }
        .ticket-card:hover {
            transform: translateY(-6px);
            border-color: rgba(108, 92, 231, 0.3);
            box-shadow: 0 12px 40px rgba(0,0,0,0.4);
        }
        .ticket-card.recommended {
            border-color: var(--color-cyan-glow);
            box-shadow: 0 0 30px rgba(0, 212, 255, 0.1);
            transform: scale(1.03);
        }
        .ticket-card.recommended:hover { transform: scale(1.03) translateY(-6px); }
        .ticket-badge {
            position: absolute;
            top: -12px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--color-amber-accent);
            color: #1A1A2E;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 4px 20px;
            border-radius: 20px;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }
        .ticket-name {
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .ticket-price {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--color-text-primary);
        }
        .ticket-price small { font-size: 0.9rem; font-weight: 400; color: var(--color-text-secondary); }
        .ticket-features {
            text-align: left;
            margin-bottom: 24px;
            flex: 1;
        }
        .ticket-features li {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 6px 0;
            font-size: 0.9rem;
            color: var(--color-text-secondary);
        }
        .ticket-features li i { color: var(--color-cyan-glow); font-size: 0.85rem; width: 18px; text-align: center; }
        .ticket-card .btn { width: 100%; margin-top: auto; }
        @media (max-width: 1024px) { .ticket-grid { grid-template-columns: 1fr; max-width: 420px; margin: 0 auto; } .ticket-card.recommended { transform: none; } .ticket-card.recommended:hover { transform: translateY(-6px); } }

        /* ===== CTA Section ===== */
        .cta-section {
            background: linear-gradient(160deg, var(--color-panel-bg), #0F1325);
            text-align: center;
            padding: 80px 24px;
        }
        .cta-section h2 {
            font-size: 2rem;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: var(--color-text-secondary);
            max-width: 600px;
            margin: 0 auto 32px;
            font-size: 1.05rem;
        }
        .cta-section .btn-lg {
            background: linear-gradient(135deg, var(--color-brand-primary), var(--color-cyan-glow));
            box-shadow: 0 0 30px rgba(108, 92, 231, 0.3);
        }
        .cta-section .btn-lg:hover {
            box-shadow: 0 0 50px rgba(108, 92, 231, 0.5), 0 0 80px rgba(0, 212, 255, 0.15);
            transform: translateY(-3px);
        }
        @media (max-width: 768px) { .cta-section { padding: 48px 16px; } .cta-section h2 { font-size: 1.5rem; } }

        /* ===== CMS News List ===== */
        .news-section {
            background: var(--color-deep-space);
        }
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .news-card {
            display: flex;
            gap: 20px;
            padding: 20px;
            align-items: flex-start;
        }
        .news-thumb {
            width: 120px;
            height: 90px;
            flex-shrink: 0;
            border-radius: 10px;
            overflow: hidden;
            background: var(--color-panel-bg);
        }
        .news-thumb img { width: 100%; height: 100%; object-fit: cover; }
        .news-info { flex: 1; min-width: 0; }
        .news-info h3 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 6px;
            line-height: 1.4;
        }
        .news-info h3 a { color: var(--color-text-primary); }
        .news-info h3 a:hover { color: var(--color-cyan-glow); }
        .news-excerpt {
            font-size: 0.88rem;
            color: var(--color-text-secondary);
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--color-text-disabled);
        }
        .news-meta .tag {
            display: inline-block;
            background: rgba(108, 92, 231, 0.15);
            color: var(--color-brand-hover);
            padding: 2px 12px;
            border-radius: 12px;
            font-size: 0.75rem;
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            color: var(--color-text-disabled);
            font-size: 1rem;
        }
        .news-empty i { font-size: 2.4rem; margin-bottom: 16px; color: var(--color-text-disabled); display: block; }
        @media (max-width: 768px) { .news-grid { grid-template-columns: 1fr; } .news-card { flex-direction: column; } .news-thumb { width: 100%; height: 160px; } }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--color-panel-bg);
        }
        .faq-list {
            max-width: 720px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 18px 0;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 500;
            color: var(--color-text-primary);
            transition: color var(--transition-standard);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            font-family: inherit;
        }
        .faq-question:hover { color: var(--color-cyan-glow); }
        .faq-question i { color: var(--color-text-secondary); transition: transform var(--transition-standard); font-size: 0.85rem; }
        .faq-question.open i { transform: rotate(180deg); color: var(--color-cyan-glow); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0;
            color: var(--color-text-secondary);
            font-size: 0.92rem;
            line-height: 1.7;
        }
        .faq-answer.open {
            max-height: 300px;
            padding: 0 0 20px;
        }
        @media (max-width: 768px) { .faq-question { font-size: 0.95rem; padding: 14px 0; } }

        /* ===== Footer ===== */
        .site-footer {
            background: #070A14;
            padding: 48px 24px 32px;
            border-top: 1px solid rgba(255,255,255,0.04);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 40px;
        }
        .footer-brand .site-logo { font-size: 1.2rem; margin-bottom: 12px; display: inline-flex; }
        .footer-brand p {
            font-size: 0.88rem;
            color: var(--color-text-disabled);
            max-width: 300px;
            line-height: 1.7;
        }
        .footer-col h4 {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--color-text-primary);
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            padding: 4px 0;
            font-size: 0.88rem;
            color: var(--color-text-disabled);
            transition: color var(--transition-standard);
        }
        .footer-col a:hover { color: var(--color-cyan-glow); }
        .footer-bottom {
            text-align: center;
            padding-top: 24px;
            border-top: 1px solid rgba(255,255,255,0.04);
            font-size: 0.82rem;
            color: var(--color-text-disabled);
        }
        .footer-bottom a { color: var(--color-text-disabled); }
        .footer-bottom a:hover { color: var(--color-cyan-glow); }
        @media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; } .footer-brand { grid-column: 1 / -1; } }
        @media (max-width: 480px) { .footer-grid { grid-template-columns: 1fr; } }

        /* ===== Miscellaneous ===== */
        .backdrop-blur { backdrop-filter: blur(var(--glass-blur)); -webkit-backdrop-filter: blur(var(--glass-blur)); }
        .badge {
            display: inline-block;
            background: rgba(108, 92, 231, 0.2);
            color: var(--color-brand-hover);
            padding: 2px 14px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 500;
        }
        .gap-8 { gap: 8px; }
        .gap-16 { gap: 16px; }
        .mt-16 { margin-top: 16px; }
        .mt-24 { margin-top: 24px; }
        .mt-32 { margin-top: 32px; }
        .mb-8 { margin-bottom: 8px; }
        .mb-16 { margin-bottom: 16px; }
        .mb-24 { margin-bottom: 24px; }
        .mb-32 { margin-bottom: 32px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .flex-wrap { flex-wrap: wrap; }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --color-deep-space: #0B0E1A;
            --color-panel-bg: #111527;
            --color-glass-bg: rgba(255, 255, 255, 0.05);
            --color-glass-border: rgba(255, 255, 255, 0.08);
            --color-brand-primary: #6C5CE7;
            --color-brand-hover: #7D6FF0;
            --color-brand-active: #5A4DD0;
            --color-cyan-glow: #00D4FF;
            --color-amber-accent: #FFB347;
            --color-text-primary: #EAEDF5;
            --color-text-secondary: #9AA3B8;
            --color-text-disabled: #5A6378;
            --color-disabled-bg: #3A3D52;
            --glass-blur: 12px;
            --glass-radius: 16px;
            --btn-radius: 8px;
            --btn-glow: 0 0 20px rgba(108, 92, 231, 0.4);
            --font-family: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
            --container-max: 1280px;
            --spacing-section: 80px;
            --spacing-card-padding: 24px;
            --transition-default: 0.3s ease;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-family);
            background: var(--color-deep-space);
            color: var(--color-text-primary);
            line-height: 1.8;
            font-size: 1rem;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--color-cyan-glow); text-decoration: none; transition: color var(--transition-default); }
        a:hover { color: var(--color-brand-hover); }
        a:focus-visible { outline: 2px solid var(--color-cyan-glow); outline-offset: 2px; border-radius: 4px; }
        img { max-width: 100%; height: auto; display: block; border-radius: 8px; }
        button, input, textarea { font-family: inherit; font-size: 1rem; border: none; outline: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { font-weight: 600; line-height: 1.3; color: var(--color-text-primary); }

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

        /* ===== Site Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(11, 14, 26, 0.85);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--color-glass-border);
            padding: 0 0;
            height: 68px;
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--color-text-primary);
            text-decoration: none;
            letter-spacing: -0.01em;
        }
        .site-logo i { color: var(--color-brand-primary); font-size: 1.8rem; }
        .site-logo span { color: var(--color-text-primary); }
        .site-logo:hover { color: var(--color-text-primary); }
        .site-logo:hover span { color: var(--color-cyan-glow); }

        .nav-toggle {
            display: none;
            background: none;
            color: var(--color-text-primary);
            font-size: 1.6rem;
            cursor: pointer;
            padding: 8px 12px;
            border-radius: 8px;
            transition: background var(--transition-default);
        }
        .nav-toggle:hover { background: var(--color-glass-bg); }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list > a,
        .nav-list .mega-trigger > a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 10px 18px;
            color: var(--color-text-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            border-radius: 8px;
            transition: all var(--transition-default);
            position: relative;
            text-decoration: none;
        }
        .nav-list > a i,
        .nav-list .mega-trigger > a i { font-size: 1rem; }
        .nav-list > a:hover,
        .nav-list .mega-trigger > a:hover {
            color: var(--color-text-primary);
            background: var(--color-glass-bg);
        }
        .nav-list > a.active,
        .nav-list .mega-trigger > a.active {
            color: var(--color-cyan-glow);
            background: rgba(0, 212, 255, 0.08);
        }
        .nav-list > a::after,
        .nav-list .mega-trigger > a::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 60%;
            height: 2px;
            background: var(--color-cyan-glow);
            border-radius: 2px;
            transition: transform var(--transition-default);
        }
        .nav-list > a:hover::after,
        .nav-list .mega-trigger > a:hover::after { transform: translateX(-50%) scaleX(1); }
        .nav-list > a.active::after,
        .nav-list .mega-trigger > a.active::after { transform: translateX(-50%) scaleX(1); }

        /* Mega Menu */
        .mega-trigger {
            position: relative;
        }
        .mega-panel {
            position: absolute;
            top: calc(100% + 12px);
            left: 50%;
            transform: translateX(-50%) translateY(8px);
            background: var(--color-panel-bg);
            backdrop-filter: blur(var(--glass-blur));
            -webkit-backdrop-filter: blur(var(--glass-blur));
            border: 1px solid var(--color-glass-border);
            border-radius: var(--glass-radius);
            padding: 24px;
            min-width: 480px;
            opacity: 0;
            visibility: hidden;
            pointer-events: none;
            transition: all 0.25s ease;
            box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5);
            z-index: 100;
        }
        .mega-trigger:hover .mega-panel {
            opacity: 1;
            visibility: visible;
            pointer-events: auto;
            transform: translateX(-50%) translateY(0);
        }
        .mega-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }
        .mega-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: 12px;
            background: var(--color-glass-bg);
            border: 1px solid transparent;
            transition: all var(--transition-default);
            cursor: pointer;
            color: var(--color-text-secondary);
            font-weight: 500;
        }
        .mega-item i { color: var(--color-brand-primary); font-size: 1.2rem; width: 24px; text-align: center; }
        .mega-item:hover {
            background: rgba(108, 92, 231, 0.12);
            border-color: rgba(108, 92, 231, 0.25);
            color: var(--color-text-primary);
            transform: translateY(-2px);
        }

        /* ===== Article Hero ===== */
        .article-hero {
            padding: 120px 0 48px;
            background: linear-gradient(135deg, var(--color-deep-space) 0%, var(--color-panel-bg) 100%);
            position: relative;
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(108, 92, 231, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .article-hero::after {
            content: '';
            position: absolute;
            bottom: -20%;
            left: -5%;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(0, 212, 255, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.875rem;
            color: var(--color-text-secondary);
            margin-bottom: 24px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }
        .breadcrumb a { color: var(--color-text-secondary); transition: color var(--transition-default); }
        .breadcrumb a:hover { color: var(--color-cyan-glow); }
        .breadcrumb .separator { color: var(--color-text-disabled); }
        .breadcrumb .current { color: var(--color-text-primary); font-weight: 500; }

        .article-hero h1 {
            font-size: 2.75rem;
            font-weight: 700;
            letter-spacing: -0.01em;
            line-height: 1.25;
            margin-bottom: 20px;
            position: relative;
            z-index: 1;
            max-width: 900px;
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            position: relative;
            z-index: 1;
        }
        .article-meta i { margin-right: 6px; color: var(--color-brand-primary); }
        .article-meta .category-tag {
            display: inline-block;
            padding: 4px 14px;
            background: rgba(108, 92, 231, 0.15);
            color: var(--color-brand-hover);
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 500;
        }

        /* ===== Article Content ===== */
        .article-content-section {
            padding: 48px 0 64px;
            background: var(--color-deep-space);
        }
        .article-body {
            max-width: 720px;
            margin: 0 auto;
        }
        .article-body p {
            margin-bottom: 1.5em;
            font-size: 1.05rem;
            line-height: 1.8;
            color: var(--color-text-primary);
        }
        .article-body h2 {
            font-size: 1.75rem;
            margin: 2em 0 0.75em;
            color: var(--color-text-primary);
        }
        .article-body h3 {
            font-size: 1.25rem;
            margin: 1.5em 0 0.5em;
            color: var(--color-text-primary);
        }
        .article-body img {
            margin: 2em auto;
            border-radius: 12px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
            max-width: 100%;
        }
        .article-body ul, .article-body ol {
            margin: 1.2em 0 1.2em 1.8em;
            color: var(--color-text-primary);
        }
        .article-body li { margin-bottom: 0.5em; line-height: 1.7; }
        .article-body ul li { list-style: disc; }
        .article-body ol li { list-style: decimal; }
        .article-body blockquote {
            border-left: 4px solid var(--color-brand-primary);
            padding: 16px 24px;
            margin: 1.5em 0;
            background: var(--color-glass-bg);
            border-radius: 0 12px 12px 0;
            color: var(--color-text-secondary);
            font-style: italic;
        }
        .article-body a { color: var(--color-cyan-glow); border-bottom: 1px solid transparent; transition: all var(--transition-default); }
        .article-body a:hover { border-bottom-color: var(--color-cyan-glow); }

        .article-not-found {
            text-align: center;
            padding: 80px 24px;
            color: var(--color-text-secondary);
        }
        .article-not-found i { font-size: 3rem; color: var(--color-text-disabled); margin-bottom: 16px; }
        .article-not-found h2 { font-size: 1.8rem; margin-bottom: 12px; color: var(--color-text-primary); }
        .article-not-found p { font-size: 1.1rem; margin-bottom: 24px; }
        .article-not-found .btn { display: inline-block; }

        /* ===== Related Posts ===== */
        .related-posts {
            padding: 64px 0;
            background: var(--color-panel-bg);
        }
        .related-posts h2 {
            font-size: 2rem;
            font-weight: 600;
            margin-bottom: 40px;
            text-align: center;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--color-glass-bg);
            backdrop-filter: blur(var(--glass-blur));
            -webkit-backdrop-filter: blur(var(--glass-blur));
            border: 1px solid var(--color-glass-border);
            border-radius: var(--glass-radius);
            padding: var(--spacing-card-padding);
            transition: all var(--transition-default);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
        }
        .related-card:hover {
            transform: translateY(-6px);
            border-color: rgba(108, 92, 231, 0.3);
            box-shadow: 0 12px 40px rgba(108, 92, 231, 0.15);
        }
        .related-card .card-img {
            width: 100%;
            height: 160px;
            object-fit: cover;
            border-radius: 10px;
            margin-bottom: 16px;
            background: var(--color-panel-bg);
        }
        .related-card h3 {
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--color-text-primary);
            line-height: 1.4;
        }
        .related-card p {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.6;
            margin-bottom: 12px;
        }
        .related-card .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--color-text-disabled);
        }
        .related-card .card-meta i { color: var(--color-brand-primary); font-size: 0.75rem; margin-right: 4px; }
        .related-card .read-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            color: var(--color-cyan-glow);
            font-weight: 500;
            margin-top: 8px;
            transition: gap var(--transition-default);
        }
        .related-card .read-more:hover { gap: 10px; color: var(--color-brand-hover); }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 72px 24px;
            text-align: center;
            background: linear-gradient(135deg, var(--color-deep-space) 0%, var(--color-panel-bg) 100%);
            border-top: 1px solid var(--color-glass-border);
        }
        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: var(--color-text-secondary);
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 40px;
            border-radius: var(--btn-radius);
            font-weight: 600;
            font-size: 1.05rem;
            cursor: pointer;
            transition: all var(--transition-default);
            text-decoration: none;
            border: none;
            background: var(--color-brand-primary);
            color: #fff;
            box-shadow: 0 0 20px rgba(108, 92, 231, 0.3);
        }
        .btn:hover {
            background: var(--color-brand-hover);
            box-shadow: 0 0 30px rgba(108, 92, 231, 0.5), 0 0 60px rgba(108, 92, 231, 0.15);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn:active {
            background: var(--color-brand-active);
            box-shadow: none;
            transform: translateY(0);
        }
        .btn-ghost {
            background: transparent;
            border: 1px solid var(--color-glass-border);
            color: var(--color-text-primary);
            box-shadow: none;
        }
        .btn-ghost:hover {
            background: var(--color-glass-bg);
            border-color: var(--color-brand-primary);
            box-shadow: 0 0 20px rgba(108, 92, 231, 0.2);
            color: var(--color-text-primary);
        }
        .btn-amber {
            background: var(--color-amber-accent);
            color: #0B0E1A;
            box-shadow: 0 0 20px rgba(255, 179, 71, 0.3);
        }
        .btn-amber:hover {
            background: #ffc064;
            box-shadow: 0 0 30px rgba(255, 179, 71, 0.5);
            color: #0B0E1A;
        }
        .btn-glow {
            background: linear-gradient(135deg, var(--color-brand-primary), var(--color-cyan-glow));
            box-shadow: 0 0 24px rgba(108, 92, 231, 0.4);
        }
        .btn-glow:hover {
            box-shadow: 0 0 40px rgba(108, 92, 231, 0.6), 0 0 80px rgba(0, 212, 255, 0.2);
            transform: translateY(-2px);
        }

        /* ===== Site Footer ===== */
        .site-footer {
            background: #070A14;
            padding: 60px 0 24px;
            color: var(--color-text-disabled);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .site-logo { margin-bottom: 12px; font-size: 1.4rem; }
        .footer-brand .site-logo i { font-size: 1.5rem; }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; color: var(--color-text-secondary); max-width: 320px; }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text-primary);
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            color: var(--color-text-secondary);
            font-size: 0.9rem;
            padding: 4px 0;
            transition: all var(--transition-default);
        }
        .footer-col a:hover { color: var(--color-cyan-glow); padding-left: 4px; }
        .footer-col a i { width: 20px; color: var(--color-brand-primary); margin-right: 6px; }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 24px;
            text-align: center;
            font-size: 0.85rem;
            color: var(--color-text-disabled);
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
        }
        .footer-bottom a { color: var(--color-text-secondary); }
        .footer-bottom a:hover { color: var(--color-cyan-glow); }

        /* ===== Back to Top ===== */
        .back-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--color-brand-primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            box-shadow: 0 4px 20px rgba(108, 92, 231, 0.4);
            border: none;
            cursor: pointer;
            transition: all var(--transition-default);
            z-index: 999;
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
        }
        .back-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
        .back-top:hover { background: var(--color-brand-hover); transform: translateY(-4px); box-shadow: 0 8px 30px rgba(108, 92, 231, 0.6); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            :root { --spacing-section: 48px; --spacing-card-padding: 16px; }
            .nav-toggle { display: block; }
            .nav-list {
                position: fixed;
                top: 68px;
                left: 0;
                width: 100%;
                background: rgba(11, 14, 26, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 24px 20px;
                gap: 4px;
                border-bottom: 1px solid var(--color-glass-border);
                transform: translateY(-120%);
                opacity: 0;
                visibility: hidden;
                transition: all 0.35s ease;
                box-shadow: 0 24px 48px rgba(0, 0, 0, 0.5);
                max-height: calc(100vh - 68px);
                overflow-y: auto;
            }
            .nav-list.open { transform: translateY(0); opacity: 1; visibility: visible; }
            .nav-list > a, .nav-list .mega-trigger > a {
                width: 100%;
                padding: 14px 16px;
                font-size: 1.05rem;
                border-radius: 10px;
            }
            .nav-list > a::after, .nav-list .mega-trigger > a::after { display: none; }
            .mega-trigger .mega-panel {
                position: static;
                transform: none;
                min-width: auto;
                opacity: 1;
                visibility: visible;
                pointer-events: auto;
                background: transparent;
                border: none;
                box-shadow: none;
                padding: 8px 0 8px 16px;
                display: none;
            }
            .mega-trigger.open .mega-panel { display: block; }
            .mega-grid { grid-template-columns: 1fr; gap: 8px; }
            .mega-item { padding: 10px 14px; }

            .article-hero { padding: 100px 0 32px; }
            .article-hero h1 { font-size: 1.8rem; }
            .article-meta { gap: 12px; font-size: 0.85rem; }

            .article-body { padding: 0 4px; }
            .article-body p { font-size: 1rem; }

            .related-grid { grid-template-columns: 1fr; }
            .related-posts h2 { font-size: 1.6rem; }

            .cta-section h2 { font-size: 1.6rem; }
            .cta-section p { font-size: 1rem; }
            .btn { width: 100%; justify-content: center; padding: 14px 24px; }

            .footer-grid { grid-template-columns: 1fr; gap: 32px; }
            .footer-brand p { max-width: 100%; }
            .footer-bottom { flex-direction: column; gap: 6px; }
        }
        @media (max-width: 480px) {
            .article-hero h1 { font-size: 1.5rem; }
            .article-meta { flex-direction: column; align-items: flex-start; gap: 8px; }
            .breadcrumb { font-size: 0.8rem; }
            .cta-section h2 { font-size: 1.4rem; }
            .back-top { bottom: 20px; right: 20px; width: 42px; height: 42px; font-size: 1.1rem; }
        }

/* roulang page: category1 */
/* ===== CSS 设计变量 ===== */
        :root {
            --color-deep-space: #0B0E1A;
            --color-panel-bg: #111527;
            --color-glass-bg: rgba(255, 255, 255, 0.05);
            --color-glass-border: rgba(255, 255, 255, 0.08);
            --color-brand-primary: #6C5CE7;
            --color-brand-hover: #7D6FF0;
            --color-brand-active: #5A4DD0;
            --color-cyan-glow: #00D4FF;
            --color-amber-accent: #FFB347;
            --color-text-primary: #EAEDF5;
            --color-text-secondary: #9AA3B8;
            --color-text-disabled: #5A6378;
            --color-disabled-bg: #3A3D52;
            --glass-blur: 12px;
            --glass-radius: 16px;
            --btn-radius: 8px;
            --btn-radius-round: 24px;
            --btn-glow: 0 0 20px rgba(108, 92, 231, 0.4);
            --max-container: 1280px;
            --spacing-section: 80px;
            --spacing-section-mobile: 48px;
            --card-padding: 24px;
            --card-padding-mobile: 16px;
            --transition-base: 0.25s ease;
            --font-base: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-base);
            background-color: var(--color-deep-space);
            color: var(--color-text-primary);
            font-size: 1rem;
            line-height: 1.8;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--color-cyan-glow);
            text-decoration: none;
            transition: color var(--transition-base);
        }
        a:hover {
            color: var(--color-brand-hover);
        }
        a:focus-visible {
            outline: 2px solid var(--color-cyan-glow);
            outline-offset: 4px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 8px;
        }

        button,
        input,
        textarea {
            font-family: var(--font-base);
            font-size: 1rem;
            border: none;
            outline: none;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 600;
            line-height: 1.3;
            color: var(--color-text-primary);
        }

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

        /* ===== 标题层级 ===== */
        h1 {
            font-size: 2.75rem;
            font-weight: 700;
            letter-spacing: -0.01em;
        }
        h2 {
            font-size: 2rem;
            font-weight: 600;
            letter-spacing: 0;
        }
        h3 {
            font-size: 1.25rem;
            font-weight: 600;
        }
        .text-secondary {
            color: var(--color-text-secondary);
        }
        .text-disabled {
            color: var(--color-text-disabled);
        }
        .text-sm {
            font-size: 0.875rem;
        }
        .text-xs {
            font-size: 0.75rem;
            font-weight: 500;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 32px;
            border-radius: var(--btn-radius);
            font-weight: 500;
            cursor: pointer;
            transition: all var(--transition-base);
            border: 1px solid transparent;
            background: var(--color-brand-primary);
            color: #fff;
            text-align: center;
        }
        .btn:hover {
            background: var(--color-brand-hover);
            box-shadow: var(--btn-glow);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn:active {
            background: var(--color-brand-active);
            box-shadow: none;
            transform: translateY(0);
        }
        .btn:disabled {
            background: var(--color-disabled-bg);
            color: var(--color-text-disabled);
            cursor: not-allowed;
            box-shadow: none;
            transform: none;
        }
        .btn-ghost {
            background: transparent;
            border: 1px solid var(--color-glass-border);
            color: var(--color-text-primary);
        }
        .btn-ghost:hover {
            background: var(--color-glass-bg);
            border-color: var(--color-brand-primary);
            color: var(--color-text-primary);
        }
        .btn-glow {
            background: linear-gradient(135deg, var(--color-brand-primary), var(--color-cyan-glow));
            box-shadow: var(--btn-glow);
        }
        .btn-glow:hover {
            box-shadow: 0 0 30px rgba(108, 92, 231, 0.6), 0 0 80px rgba(108, 92, 231, 0.2);
            transform: translateY(-2px);
        }
        .btn-lg {
            padding: 16px 48px;
            border-radius: var(--btn-radius-round);
            font-size: 1.125rem;
        }
        .btn-block {
            width: 100%;
        }

        /* ===== 标签/徽章 ===== */
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 500;
            background: var(--color-glass-bg);
            border: 1px solid var(--color-glass-border);
            color: var(--color-text-secondary);
            letter-spacing: 0.02em;
        }
        .badge-primary {
            background: rgba(108, 92, 231, 0.2);
            border-color: var(--color-brand-primary);
            color: var(--color-brand-hover);
        }
        .badge-amber {
            background: rgba(255, 179, 71, 0.2);
            border-color: var(--color-amber-accent);
            color: var(--color-amber-accent);
        }
        .badge-cyan {
            background: rgba(0, 212, 255, 0.15);
            border-color: var(--color-cyan-glow);
            color: var(--color-cyan-glow);
        }

        /* ===== 卡片 ===== */
        .card {
            background: var(--color-glass-bg);
            backdrop-filter: blur(var(--glass-blur));
            -webkit-backdrop-filter: blur(var(--glass-blur));
            border: 1px solid var(--color-glass-border);
            border-radius: var(--glass-radius);
            padding: var(--card-padding);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
            transition: all var(--transition-base);
        }
        .card:hover {
            border-color: rgba(108, 92, 231, 0.3);
            transform: translateY(-4px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
        }
        .card-glow:hover {
            border-color: var(--color-cyan-glow);
            box-shadow: 0 0 30px rgba(0, 212, 255, 0.15), 0 8px 32px rgba(0, 0, 0, 0.3);
        }

        /* ===== 分割线 ===== */
        .divider {
            width: 100%;
            height: 1px;
            background: var(--color-glass-border);
            margin: 40px 0;
        }

        /* ===== 表单 ===== */
        .form-input {
            width: 100%;
            padding: 14px 18px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 10px;
            color: var(--color-text-primary);
            transition: all var(--transition-base);
        }
        .form-input::placeholder {
            color: var(--color-text-disabled);
        }
        .form-input:focus {
            border-color: var(--color-brand-primary);
            box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.2);
        }

        /* ===== Header / 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(11, 14, 26, 0.85);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--color-glass-border);
            transition: background var(--transition-base);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--color-text-primary);
            text-decoration: none;
        }
        .site-logo i {
            font-size: 1.6rem;
            color: var(--color-brand-primary);
        }
        .site-logo span {
            background: linear-gradient(135deg, var(--color-text-primary), var(--color-cyan-glow));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .site-logo:hover {
            color: var(--color-text-primary);
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-list a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: 8px;
            color: var(--color-text-secondary);
            font-size: 0.95rem;
            font-weight: 500;
            transition: all var(--transition-base);
            position: relative;
            text-decoration: none;
        }
        .nav-list a i {
            font-size: 0.9rem;
        }
        .nav-list a:hover {
            color: var(--color-text-primary);
            background: var(--color-glass-bg);
        }
        .nav-list a::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            width: 0;
            height: 2px;
            background: var(--color-cyan-glow);
            transition: all var(--transition-base);
            transform: translateX(-50%);
            border-radius: 2px;
        }
        .nav-list a:hover::after,
        .nav-list a.active::after {
            width: 60%;
        }
        .nav-list a.active {
            color: var(--color-text-primary);
            background: rgba(108, 92, 231, 0.12);
        }

        /* Mega 菜单 */
        .mega-trigger {
            position: relative;
        }
        .mega-trigger>a {
            cursor: pointer;
        }
        .mega-panel {
            display: none;
            position: absolute;
            top: calc(100% + 8px);
            left: 50%;
            transform: translateX(-50%);
            background: var(--color-panel-bg);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--color-glass-border);
            border-radius: var(--glass-radius);
            padding: 24px;
            min-width: 320px;
            box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5);
            opacity: 0;
            animation: fadeIn 0.25s ease forwards;
            z-index: 100;
        }
        .mega-trigger:hover .mega-panel {
            display: block;
        }
        .mega-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }
        .mega-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: 10px;
            background: var(--color-glass-bg);
            border: 1px solid transparent;
            transition: all var(--transition-base);
            cursor: pointer;
            color: var(--color-text-secondary);
        }
        .mega-item i {
            font-size: 1.2rem;
            color: var(--color-brand-primary);
            width: 28px;
            text-align: center;
        }
        .mega-item:hover {
            border-color: var(--color-glass-border);
            background: rgba(108, 92, 231, 0.08);
            color: var(--color-text-primary);
        }

        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateX(-50%) translateY(8px);
            }
            to {
                opacity: 1;
                transform: translateX(-50%) translateY(0);
            }
        }

        /* 导航汉堡按钮 */
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--color-text-primary);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
            transition: background var(--transition-base);
        }
        .nav-toggle:hover {
            background: var(--color-glass-bg);
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 120px 24px 80px;
            background: linear-gradient(135deg, var(--color-deep-space) 0%, var(--color-panel-bg) 100%);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            z-index: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.2;
            mix-blend-mode: overlay;
        }
        .hero-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(108, 92, 231, 0.15) 0%, transparent 70%);
        }
        .hero-content {
            position: relative;
            z-index: 1;
            max-width: 800px;
        }
        .hero-content h1 {
            margin-bottom: 20px;
            background: linear-gradient(135deg, var(--color-text-primary), var(--color-cyan-glow));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-content .hero-sub {
            font-size: 1.2rem;
            color: var(--color-text-secondary);
            margin-bottom: 36px;
            line-height: 1.6;
            max-width: 640px;
            margin-left: auto;
            margin-right: auto;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .hero-actions .btn {
            min-width: 180px;
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: var(--spacing-section) 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: 16px;
        }
        .section-subtitle {
            text-align: center;
            color: var(--color-text-secondary);
            max-width: 640px;
            margin: 0 auto 48px;
            font-size: 1.05rem;
        }

        /* ===== 网格 ===== */
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 32px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr 1fr;
            gap: 24px;
        }

        /* ===== 优势卡片 ===== */
        .advantage-card {
            text-align: center;
            padding: var(--card-padding);
        }
        .advantage-card .icon-wrap {
            width: 64px;
            height: 64px;
            margin: 0 auto 16px;
            border-radius: 16px;
            background: rgba(108, 92, 231, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--color-brand-primary);
            transition: all var(--transition-base);
        }
        .advantage-card:hover .icon-wrap {
            background: rgba(108, 92, 231, 0.25);
            box-shadow: 0 0 20px rgba(108, 92, 231, 0.2);
        }
        .advantage-card h3 {
            margin-bottom: 8px;
        }
        .advantage-card p {
            color: var(--color-text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        /* ===== 场景列表 ===== */
        .scene-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .scene-item {
            display: flex;
            gap: 20px;
            align-items: flex-start;
            padding: var(--card-padding);
            background: var(--color-glass-bg);
            backdrop-filter: blur(var(--glass-blur));
            -webkit-backdrop-filter: blur(var(--glass-blur));
            border: 1px solid var(--color-glass-border);
            border-radius: var(--glass-radius);
            transition: all var(--transition-base);
        }
        .scene-item:hover {
            border-color: rgba(0, 212, 255, 0.2);
            transform: translateY(-2px);
        }
        .scene-item .scene-icon {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(108, 92, 231, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--color-cyan-glow);
        }
        .scene-item .scene-text h4 {
            font-size: 1.1rem;
            margin-bottom: 4px;
        }
        .scene-item .scene-text p {
            color: var(--color-text-secondary);
            font-size: 0.9rem;
            line-height: 1.6;
        }

        /* ===== 流程步骤 ===== */
        .steps {
            display: flex;
            gap: 0;
            justify-content: center;
            flex-wrap: wrap;
            position: relative;
        }
        .step {
            flex: 1;
            min-width: 200px;
            max-width: 260px;
            text-align: center;
            padding: 32px 20px;
            position: relative;
        }
        .step::after {
            content: '';
            position: absolute;
            top: 56px;
            right: -16px;
            width: 32px;
            height: 2px;
            background: linear-gradient(90deg, var(--color-brand-primary), var(--color-cyan-glow));
            opacity: 0.4;
        }
        .step:last-child::after {
            display: none;
        }
        .step .step-num {
            width: 56px;
            height: 56px;
            margin: 0 auto 16px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-brand-primary), var(--color-cyan-glow));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            box-shadow: 0 0 20px rgba(108, 92, 231, 0.3);
        }
        .step h4 {
            margin-bottom: 6px;
        }
        .step p {
            color: var(--color-text-secondary);
            font-size: 0.9rem;
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--color-panel-bg);
            border: 1px solid var(--color-glass-border);
            border-radius: 12px;
            overflow: hidden;
            transition: border-color var(--transition-base);
        }
        .faq-item:hover {
            border-color: rgba(108, 92, 231, 0.3);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            cursor: pointer;
            font-weight: 500;
            font-size: 1.05rem;
            background: transparent;
            border: none;
            color: var(--color-text-primary);
            width: 100%;
            text-align: left;
            transition: background var(--transition-base);
        }
        .faq-question:hover {
            background: rgba(255, 255, 255, 0.03);
        }
        .faq-question i {
            transition: transform var(--transition-base);
            color: var(--color-text-secondary);
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
            color: var(--color-text-secondary);
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--color-panel-bg) 0%, var(--color-deep-space) 100%);
            border-top: 1px solid var(--color-glass-border);
            border-bottom: 1px solid var(--color-glass-border);
            text-align: center;
            padding: 80px 24px;
        }
        .cta-section h2 {
            margin-bottom: 12px;
        }
        .cta-section p {
            color: var(--color-text-secondary);
            max-width: 560px;
            margin: 0 auto 32px;
            font-size: 1.05rem;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #070A14;
            padding: 60px 0 30px;
            border-top: 1px solid var(--color-glass-border);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .site-logo {
            margin-bottom: 16px;
        }
        .footer-brand p {
            color: var(--color-text-disabled);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 360px;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            margin-bottom: 16px;
            color: var(--color-text-primary);
        }
        .footer-col a {
            display: block;
            color: var(--color-text-disabled);
            font-size: 0.9rem;
            padding: 6px 0;
            transition: color var(--transition-base);
            text-decoration: none;
        }
        .footer-col a:hover {
            color: var(--color-cyan-glow);
        }
        .footer-col a i {
            margin-right: 8px;
            width: 16px;
        }
        .footer-bottom {
            border-top: 1px solid var(--color-glass-border);
            padding-top: 24px;
            text-align: center;
            color: var(--color-text-disabled);
            font-size: 0.85rem;
        }
        .footer-bottom a {
            color: var(--color-text-disabled);
            text-decoration: none;
        }
        .footer-bottom a:hover {
            color: var(--color-cyan-glow);
        }

        /* ===== 响应式 ===== */

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

            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.5rem;
            }

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

            /* 导航 */
            .nav-list {
                display: none;
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                background: rgba(11, 14, 26, 0.96);
                backdrop-filter: blur(14px);
                -webkit-backdrop-filter: blur(14px);
                flex-direction: column;
                padding: 24px 16px;
                gap: 8px;
                border-bottom: 1px solid var(--color-glass-border);
                max-height: calc(100vh - 72px);
                overflow-y: auto;
            }
            .nav-list.open {
                display: flex;
            }
            .nav-list a {
                width: 100%;
                padding: 12px 16px;
                justify-content: flex-start;
            }
            .nav-list a::after {
                display: none;
            }

            .nav-toggle {
                display: block;
            }

            /* Mega 面板在移动端隐藏 */
            .mega-panel {
                display: none !important;
            }

            /* Hero */
            .hero {
                min-height: 80vh;
                padding: 100px 16px 60px;
            }
            .hero-content .hero-sub {
                font-size: 1rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .hero-actions .btn {
                width: 100%;
                min-width: unset;
            }

            /* 网格 */
            .grid-2,
            .grid-3,
            .grid-4 {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            /* 场景列表 */
            .scene-list {
                grid-template-columns: 1fr;
            }

            /* 步骤 */
            .steps {
                flex-direction: column;
                align-items: center;
            }
            .step {
                max-width: 100%;
                min-width: unset;
                padding: 24px 16px;
            }
            .step::after {
                display: none;
            }

            /* FAQ */
            .faq-question {
                padding: 14px 16px;
                font-size: 0.95rem;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 16px;
            }

            /* CTA */
            .cta-section {
                padding: 48px 16px;
            }
            .cta-section .btn-lg {
                width: 100%;
            }

            /* 页脚 */
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px 24px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }

            /* 卡片 */
            .card {
                padding: var(--card-padding-mobile);
            }
            .advantage-card {
                padding: var(--card-padding-mobile);
            }
            .scene-item {
                padding: var(--card-padding-mobile);
                flex-direction: column;
                align-items: flex-start;
            }
        }

        /* 手机 480px 以下 */
        @media (max-width: 480px) {
            .container {
                padding: 0 12px;
            }
            h1 {
                font-size: 1.5rem;
            }
            h2 {
                font-size: 1.3rem;
            }
            .hero {
                min-height: 70vh;
                padding: 80px 12px 40px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .site-logo span {
                font-size: 1.1rem;
            }
            .site-logo i {
                font-size: 1.3rem;
            }
            .btn-lg {
                padding: 14px 32px;
                font-size: 1rem;
            }
            .step .step-num {
                width: 44px;
                height: 44px;
                font-size: 1rem;
            }
        }

        /* ===== 工具类 ===== */
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .mb-32 {
            margin-bottom: 32px;
        }
        .text-center {
            text-align: center;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .gap-16 {
            gap: 16px;
        }
        .gap-24 {
            gap: 24px;
        }