/* roulang page: index */
:root {
            --color-neon-cyan: #00f0ff;
            --color-neon-purple: #a855f7;
            --color-neon-pink: #ff2d95;
            --color-neon-green: #39ff14;
            --color-dark-base: #0a0a0f;
            --color-dark-card: #111118;
            --color-dark-panel: #16161f;
            --color-dark-border: #1e1e2e;
            --color-dark-muted: #2a2a3a;
            --color-text-primary: #e8e8f0;
            --color-text-secondary: #a0a0b8;
            --color-text-muted: #6b6b80;
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
            --shadow-glow-cyan: 0 0 20px rgba(0, 240, 255, 0.25), 0 0 60px rgba(0, 240, 255, 0.08);
            --shadow-glow-purple: 0 0 20px rgba(168, 85, 247, 0.25), 0 0 60px rgba(168, 85, 247, 0.08);
            --shadow-glow-pink: 0 0 20px rgba(255, 45, 149, 0.3), 0 0 60px rgba(255, 45, 149, 0.1);
            --transition-fast: 0.2s ease;
            --transition-normal: 0.3s ease;
            --transition-slow: 0.5s ease;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 80px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            line-height: 1.7;
            background-color: var(--color-dark-base);
            color: var(--color-text-primary);
            min-height: 100vh;
            overflow-x: hidden;
        }

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

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

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

        input {
            font-family: inherit;
            outline: none;
            border: none;
        }

        /* 容器 */
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        @media (max-width: 768px) {
            .container-custom {
                padding: 0 1rem;
            }
        }

        /* 导航 */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(10, 10, 15, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: all var(--transition-normal);
        }

        .site-header.scrolled {
            background: rgba(10, 10, 15, 0.95);
            border-bottom-color: rgba(255, 255, 255, 0.12);
            box-shadow: 0 2px 24px rgba(0, 0, 0, 0.5);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 1.35rem;
            font-weight: 700;
            letter-spacing: 0.03em;
            color: #ffffff;
            white-space: nowrap;
            transition: all var(--transition-fast);
            position: relative;
        }

        .logo-link:hover {
            color: var(--color-neon-cyan);
            text-shadow: 0 0 24px rgba(0, 240, 255, 0.5);
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--color-neon-cyan), var(--color-neon-purple));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            font-weight: 900;
            color: #0a0a0f;
            flex-shrink: 0;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.35);
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            list-style: none;
        }

        .nav-list li a {
            display: inline-block;
            padding: 0.5rem 1rem;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            border-radius: 0.5rem;
            transition: all var(--transition-fast);
            white-space: nowrap;
            letter-spacing: 0.02em;
        }

        .nav-list li a:hover,
        .nav-list li a.active {
            color: #ffffff;
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-list li a.nav-cta {
            background: linear-gradient(135deg, var(--color-neon-cyan), var(--color-neon-purple));
            color: #0a0a0f;
            font-weight: 600;
            padding: 0.5rem 1.3rem;
            border-radius: 2rem;
            box-shadow: 0 0 16px rgba(0, 240, 255, 0.25);
            transition: all var(--transition-normal);
        }

        .nav-list li a.nav-cta:hover {
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.5);
            transform: translateY(-1px);
            color: #0a0a0f;
            background: linear-gradient(135deg, #33f5ff, #b87cf7);
        }

        /* 移动端菜单按钮 */
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            width: 40px;
            height: 40px;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 6px;
            cursor: pointer;
            z-index: 1001;
            padding: 0;
            border-radius: 8px;
            transition: background var(--transition-fast);
        }

        .mobile-toggle:hover {
            background: rgba(255, 255, 255, 0.05);
        }

        .mobile-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: #ffffff;
            border-radius: 2px;
            transition: all var(--transition-normal);
            transform-origin: center;
        }

        .mobile-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .mobile-toggle.active span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }
        .mobile-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        @media (max-width: 768px) {
            .mobile-toggle {
                display: flex;
            }
            .nav-list {
                position: fixed;
                top: 0;
                right: -100%;
                width: 280px;
                height: 100vh;
                background: rgba(16, 16, 24, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                align-items: flex-start;
                padding: 5rem 1.5rem 2rem;
                gap: 0.5rem;
                transition: right var(--transition-normal);
                border-left: 1px solid rgba(255, 255, 255, 0.06);
                box-shadow: -4px 0 30px rgba(0, 0, 0, 0.6);
                z-index: 999;
            }
            .nav-list.open {
                right: 0;
            }
            .nav-list li {
                width: 100%;
            }
            .nav-list li a {
                display: block;
                padding: 0.75rem 1rem;
                font-size: 1rem;
                border-radius: 0.6rem;
                width: 100%;
            }
            .nav-list li a.nav-cta {
                text-align: center;
                margin-top: 0.5rem;
            }
            .header-inner {
                padding: 0 1rem;
                height: 60px;
            }
            .logo-link {
                font-size: 1.15rem;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 0.9rem;
                border-radius: 8px;
            }
        }

        @media (max-width: 520px) {
            .header-inner {
                height: 56px;
            }
            .nav-list {
                width: 100%;
                right: -100%;
            }
            .nav-list.open {
                right: 0;
            }
        }

        /* 移动端遮罩 */
        .mobile-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.6);
            z-index: 998;
            transition: opacity var(--transition-normal);
        }
        .mobile-overlay.active {
            display: block;
        }

        /* Hero */
        .hero-section {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
            padding: 6rem 1.5rem 4rem;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 10, 15, 0.75) 0%, rgba(10, 10, 15, 0.88) 40%, rgba(10, 10, 15, 0.95) 100%);
            z-index: 1;
        }

        .hero-glow {
            position: absolute;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            filter: blur(140px);
            opacity: 0.35;
            z-index: 0;
            pointer-events: none;
        }
        .hero-glow.glow-cyan {
            top: 10%;
            left: -10%;
            background: var(--color-neon-cyan);
        }
        .hero-glow.glow-purple {
            bottom: 5%;
            right: -15%;
            background: var(--color-neon-purple);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 800px;
            width: 100%;
        }

        .hero-badge {
            display: inline-block;
            padding: 0.4rem 1.2rem;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.3);
            border-radius: 2rem;
            color: var(--color-neon-cyan);
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.05em;
            margin-bottom: 1.5rem;
            animation: badgePulse 3s ease-in-out infinite;
        }

        @keyframes badgePulse {
            0%,
            100% {
                box-shadow: 0 0 12px rgba(0, 240, 255, 0.2);
            }
            50% {
                box-shadow: 0 0 28px rgba(0, 240, 255, 0.45);
            }
        }

        .hero-title {
            font-size: 3.5rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: 0.02em;
            color: #ffffff;
            margin-bottom: 1.25rem;
            text-shadow: 0 0 40px rgba(255, 255, 255, 0.3);
        }

        .hero-title .highlight {
            background: linear-gradient(135deg, var(--color-neon-cyan), var(--color-neon-purple));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            text-shadow: none;
        }

        .hero-subtitle {
            font-size: 1.2rem;
            color: var(--color-text-secondary);
            margin-bottom: 2.5rem;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.8;
        }

        .hero-buttons {
            display: flex;
            gap: 1rem;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.85rem 2rem;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 3rem;
            transition: all var(--transition-normal);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--color-neon-cyan), var(--color-neon-purple));
            color: #0a0a0f;
            box-shadow: 0 0 24px rgba(0, 240, 255, 0.35);
            position: relative;
            overflow: hidden;
        }

        .btn-primary:hover {
            box-shadow: 0 0 40px rgba(0, 240, 255, 0.55);
            transform: translateY(-3px);
            color: #0a0a0f;
        }

        .btn-outline {
            background: transparent;
            border: 2px solid rgba(255, 255, 255, 0.3);
            color: #ffffff;
        }

        .btn-outline:hover {
            border-color: var(--color-neon-cyan);
            color: var(--color-neon-cyan);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
            transform: translateY(-3px);
        }

        .hero-stats-row {
            display: flex;
            gap: 2.5rem;
            justify-content: center;
            margin-top: 3.5rem;
            flex-wrap: wrap;
        }

        .hero-stat-item {
            text-align: center;
        }
        .hero-stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: #ffffff;
            letter-spacing: 0.03em;
            line-height: 1;
        }
        .hero-stat-label {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            margin-top: 0.4rem;
            letter-spacing: 0.04em;
        }

        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.2rem;
            }
            .hero-subtitle {
                font-size: 1rem;
            }
            .hero-section {
                min-height: auto;
                padding: 7rem 1rem 3rem;
            }
            .hero-stats-row {
                gap: 1.5rem;
                margin-top: 2.5rem;
            }
            .hero-stat-number {
                font-size: 1.6rem;
            }
            .btn {
                padding: 0.7rem 1.5rem;
                font-size: 0.9rem;
            }
            .hero-glow {
                width: 300px;
                height: 300px;
                filter: blur(100px);
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.7rem;
            }
            .hero-subtitle {
                font-size: 0.9rem;
            }
            .hero-buttons {
                flex-direction: column;
                align-items: center;
            }
            .hero-stats-row {
                gap: 1rem;
            }
            .hero-stat-number {
                font-size: 1.3rem;
            }
            .hero-stat-label {
                font-size: 0.75rem;
            }
        }

        /* 板块通用 */
        .section {
            padding: 5rem 1.5rem;
        }

        .section-header {
            text-align: center;
            margin-bottom: 3.5rem;
        }
        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--color-neon-cyan);
            text-transform: uppercase;
            margin-bottom: 0.75rem;
            padding: 0.3rem 1rem;
            background: rgba(0, 240, 255, 0.08);
            border-radius: 2rem;
            border: 1px solid rgba(0, 240, 255, 0.2);
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            color: #ffffff;
            letter-spacing: 0.02em;
            margin-bottom: 0.75rem;
        }
        .section-desc {
            font-size: 1rem;
            color: var(--color-text-secondary);
            max-width: 550px;
            margin: 0 auto;
            line-height: 1.7;
        }

        @media (max-width: 768px) {
            .section {
                padding: 3.5rem 1rem;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .section-header {
                margin-bottom: 2.5rem;
            }
        }

        /* 核心优势 */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            max-width: 1200px;
            margin: 0 auto;
        }

        .feature-card {
            background: var(--color-dark-card);
            border: 1px solid var(--color-dark-border);
            border-radius: var(--radius-xl);
            padding: 2rem 1.5rem;
            text-align: center;
            transition: all var(--transition-normal);
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--color-neon-cyan), var(--color-neon-purple));
            opacity: 0;
            transition: opacity var(--transition-normal);
            border-radius: 0 0 2px 2px;
        }

        .feature-card:hover {
            border-color: rgba(0, 240, 255, 0.3);
            box-shadow: var(--shadow-glow-cyan);
            transform: translateY(-6px);
        }
        .feature-card:hover::before {
            opacity: 1;
        }

        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.25rem;
            font-size: 1.5rem;
            background: rgba(0, 240, 255, 0.1);
            color: var(--color-neon-cyan);
            transition: all var(--transition-normal);
        }
        .feature-card:hover .feature-icon {
            background: rgba(0, 240, 255, 0.2);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
        }
        .feature-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 0.6rem;
            letter-spacing: 0.02em;
        }
        .feature-card p {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.6;
        }

        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1.25rem;
            }
        }
        @media (max-width: 520px) {
            .features-grid {
                grid-template-columns: 1fr;
                gap: 1rem;
            }
            .feature-card {
                padding: 1.5rem 1.25rem;
            }
        }

        /* 赛事服务 */
        .services-section {
            background: var(--color-dark-panel);
        }

        .services-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 2rem;
            max-width: 1200px;
            margin: 0 auto;
        }

        .service-card {
            background: var(--color-dark-card);
            border: 1px solid var(--color-dark-border);
            border-radius: var(--radius-xl);
            overflow: hidden;
            transition: all var(--transition-normal);
            display: flex;
            flex-direction: column;
        }

        .service-card:hover {
            border-color: rgba(168, 85, 247, 0.4);
            box-shadow: var(--shadow-glow-purple);
            transform: translateY(-4px);
        }
        .service-card-img {
            width: 100%;
            height: 220px;
            object-fit: cover;
            display: block;
        }
        .service-card-body {
            padding: 1.75rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .service-card-body h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 0.6rem;
            letter-spacing: 0.02em;
        }
        .service-card-body p {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
            flex: 1;
        }
        .service-card-tags {
            display: flex;
            gap: 0.5rem;
            flex-wrap: wrap;
            margin-top: 1rem;
        }
        .service-tag {
            font-size: 0.75rem;
            padding: 0.3rem 0.8rem;
            border-radius: 2rem;
            background: rgba(168, 85, 247, 0.12);
            color: var(--color-neon-purple);
            font-weight: 500;
            letter-spacing: 0.03em;
            border: 1px solid rgba(168, 85, 247, 0.2);
        }

        @media (max-width: 768px) {
            .services-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .service-card-img {
                height: 180px;
            }
            .service-card-body {
                padding: 1.25rem;
            }
        }

        /* 数据板块 */
        .stats-section {
            position: relative;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            overflow: hidden;
        }
        .stats-overlay {
            position: absolute;
            inset: 0;
            background: rgba(10, 10, 15, 0.9);
            z-index: 1;
        }
        .stats-content {
            position: relative;
            z-index: 2;
            max-width: 1200px;
            margin: 0 auto;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }
        .stat-card {
            text-align: center;
            padding: 2rem 1.5rem;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-xl);
            transition: all var(--transition-normal);
        }
        .stat-card:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(0, 240, 255, 0.3);
            box-shadow: var(--shadow-glow-cyan);
        }
        .stat-card .stat-number {
            font-size: 3rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--color-neon-cyan), var(--color-neon-purple));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1;
            margin-bottom: 0.5rem;
        }
        .stat-card .stat-label {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            letter-spacing: 0.04em;
        }

        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1rem;
            }
            .stat-card .stat-number {
                font-size: 2.2rem;
            }
            .stats-section {
                background-attachment: scroll;
            }
        }
        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 0.75rem;
            }
            .stat-card {
                padding: 1.25rem 1rem;
            }
            .stat-card .stat-number {
                font-size: 1.8rem;
            }
            .stat-card .stat-label {
                font-size: 0.75rem;
            }
        }

        /* 流程 Bracket */
        .bracket-section {
            background: var(--color-dark-base);
        }
        .bracket-container {
            max-width: 900px;
            margin: 0 auto;
        }
        .bracket-flow {
            display: flex;
            flex-direction: column;
            gap: 0;
            position: relative;
        }
        .bracket-step {
            display: flex;
            align-items: center;
            gap: 2rem;
            padding: 1.5rem 2rem;
            background: var(--color-dark-card);
            border: 1px solid var(--color-dark-border);
            border-radius: var(--radius-lg);
            position: relative;
            transition: all var(--transition-normal);
            margin-bottom: 1rem;
        }
        .bracket-step:hover {
            border-color: rgba(0, 240, 255, 0.35);
            box-shadow: var(--shadow-glow-cyan);
            transform: translateX(4px);
        }
        .bracket-step-number {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.3rem;
            background: linear-gradient(135deg, var(--color-neon-cyan), var(--color-neon-purple));
            color: #0a0a0f;
            box-shadow: 0 0 16px rgba(0, 240, 255, 0.3);
        }
        .bracket-step-content h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 0.3rem;
            letter-spacing: 0.02em;
        }
        .bracket-step-content p {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.6;
        }
        .bracket-connector {
            width: 2px;
            height: 20px;
            background: linear-gradient(180deg, var(--color-neon-purple), var(--color-neon-cyan));
            margin: 0 auto 0 1.75rem;
            border-radius: 1px;
            opacity: 0.6;
        }

        @media (max-width: 768px) {
            .bracket-step {
                flex-direction: column;
                align-items: flex-start;
                gap: 1rem;
                padding: 1.25rem;
            }
            .bracket-connector {
                margin-left: 1.5rem;
            }
            .bracket-step:hover {
                transform: translateX(2px);
            }
        }

        /* FAQ */
        .faq-section {
            background: var(--color-dark-panel);
        }
        .faq-container {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--color-dark-card);
            border: 1px solid var(--color-dark-border);
            border-radius: var(--radius-lg);
            margin-bottom: 0.75rem;
            overflow: hidden;
            transition: all var(--transition-normal);
        }
        .faq-item:hover {
            border-color: rgba(0, 240, 255, 0.25);
        }
        .faq-item summary {
            padding: 1.25rem 1.5rem;
            font-weight: 600;
            font-size: 1rem;
            color: #ffffff;
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            letter-spacing: 0.02em;
            transition: color var(--transition-fast);
            user-select: none;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '+';
            font-size: 1.3rem;
            font-weight: 300;
            color: var(--color-neon-cyan);
            transition: transform var(--transition-normal);
            flex-shrink: 0;
            margin-left: 1rem;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(0, 240, 255, 0.08);
        }
        .faq-item[open] summary::after {
            content: '−';
            transform: rotate(180deg);
            background: rgba(0, 240, 255, 0.15);
        }
        .faq-item[open] summary {
            color: var(--color-neon-cyan);
        }
        .faq-item .faq-answer {
            padding: 0 1.5rem 1.25rem;
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
        }

        @media (max-width: 520px) {
            .faq-item summary {
                padding: 1rem 1.25rem;
                font-size: 0.9rem;
            }
            .faq-item .faq-answer {
                padding: 0 1.25rem 1rem;
                font-size: 0.85rem;
            }
        }

        /* CTA */
        .cta-section {
            text-align: center;
            padding: 5rem 1.5rem;
            background: linear-gradient(180deg, var(--color-dark-base) 0%, var(--color-dark-panel) 100%);
            position: relative;
            overflow: hidden;
        }
        .cta-glow {
            position: absolute;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            filter: blur(120px);
            opacity: 0.25;
            pointer-events: none;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background: var(--color-neon-purple);
            z-index: 0;
        }
        .cta-content {
            position: relative;
            z-index: 2;
            max-width: 600px;
            margin: 0 auto;
        }
        .cta-content h2 {
            font-size: 2rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 1rem;
            letter-spacing: 0.02em;
        }
        .cta-content p {
            font-size: 1.05rem;
            color: var(--color-text-secondary);
            margin-bottom: 2rem;
            line-height: 1.7;
        }
        .cta-form {
            display: flex;
            gap: 0.75rem;
            max-width: 480px;
            margin: 0 auto;
            flex-wrap: wrap;
            justify-content: center;
        }
        .cta-input {
            flex: 1;
            min-width: 220px;
            padding: 0.85rem 1.25rem;
            border-radius: 3rem;
            background: var(--color-dark-card);
            border: 2px solid var(--color-dark-border);
            color: #ffffff;
            font-size: 0.95rem;
            transition: all var(--transition-normal);
            letter-spacing: 0.02em;
        }
        .cta-input:focus {
            border-color: var(--color-neon-cyan);
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.2);
            outline: none;
            background: var(--color-dark-panel);
        }
        .cta-input::placeholder {
            color: var(--color-text-muted);
        }

        @media (max-width: 520px) {
            .cta-content h2 {
                font-size: 1.5rem;
            }
            .cta-content p {
                font-size: 0.9rem;
            }
            .cta-form {
                flex-direction: column;
                align-items: center;
            }
            .cta-input {
                width: 100%;
                min-width: auto;
            }
        }

        /* Footer */
        .site-footer {
            background: #08080d;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 3rem 1.5rem 2rem;
            color: var(--color-text-muted);
            font-size: 0.85rem;
        }
        .footer-inner {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 2rem;
        }
        .footer-brand {
            max-width: 280px;
        }
        .footer-brand .footer-logo {
            font-size: 1.2rem;
            font-weight: 700;
            color: #ffffff;
            letter-spacing: 0.03em;
            margin-bottom: 0.5rem;
        }
        .footer-brand p {
            color: var(--color-text-muted);
            line-height: 1.6;
            font-size: 0.8rem;
        }
        .footer-links {
            display: flex;
            gap: 3rem;
            flex-wrap: wrap;
        }
        .footer-links h5 {
            font-size: 0.85rem;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 0.75rem;
            letter-spacing: 0.04em;
        }
        .footer-links a {
            display: block;
            color: var(--color-text-muted);
            font-size: 0.8rem;
            margin-bottom: 0.4rem;
            transition: color var(--transition-fast);
            letter-spacing: 0.02em;
        }
        .footer-links a:hover {
            color: var(--color-neon-cyan);
        }
        .footer-bottom {
            max-width: 1200px;
            margin: 2rem auto 0;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            text-align: center;
            font-size: 0.78rem;
            color: var(--color-text-muted);
            letter-spacing: 0.03em;
        }

        @media (max-width: 768px) {
            .footer-inner {
                flex-direction: column;
                gap: 1.5rem;
            }
            .footer-links {
                gap: 1.5rem;
            }
            .footer-brand {
                max-width: 100%;
            }
        }

        /* 全局动画 */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-fade-in-up {
            animation: fadeInUp 0.7s ease forwards;
        }
        .animate-delay-1 {
            animation-delay: 0.1s;
            opacity: 0;
        }
        .animate-delay-2 {
            animation-delay: 0.25s;
            opacity: 0;
        }
        .animate-delay-3 {
            animation-delay: 0.4s;
            opacity: 0;
        }
        .animate-delay-4 {
            animation-delay: 0.55s;
            opacity: 0;
        }

        /* 焦点可见 */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        summary:focus-visible {
            outline: 2px solid var(--color-neon-cyan);
            outline-offset: 3px;
            border-radius: 4px;
        }