/* roulang page: index */
:root {
            --bg-deep: #0A0E27;
            --card-bg: #1E3A5F;
            --cyan: #00F0FF;
            --purple: #7B2FFF;
            --green: #00E676;
            --orange: #FF9100;
            --text-white: #E0E6ED;
            --text-muted: #8892A4;
            --card-deeper: #141B2D;
            --border-subtle: rgba(0, 240, 255, 0.15);
            --radius-lg: 16px;
            --radius-md: 12px;
            --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(0, 240, 255, 0.08);
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.5), 0 4px 12px rgba(0, 0, 0, 0.3);
            --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
            --container-max: 1200px;
            --section-gap: 100px;
            --card-gap: 24px;
            --transition: 0.3s ease;
        }

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-deep);
            color: var(--text-white);
            line-height: 1.7;
            font-size: 16px;
            background-image: linear-gradient(rgba(0, 240, 255, 0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(0, 240, 255, 0.03) 1px, transparent 1px);
            background-size: 40px 40px;
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        a:hover {
            color: var(--purple);
        }

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

        /* 导航栏 */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(10, 14, 39, 0.85);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.3);
            transition: background var(--transition), box-shadow var(--transition);
        }

        .navbar.scrolled {
            background: rgba(10, 14, 39, 0.95);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.6);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 1.5rem;
            color: var(--text-white);
            letter-spacing: 0.5px;
        }

        .logo span {
            color: var(--cyan);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 2rem;
            list-style: none;
        }

        .nav-links a {
            color: var(--text-muted);
            font-weight: 500;
            font-size: 0.95rem;
            position: relative;
            padding: 6px 0;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--cyan);
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--cyan);
            transition: width var(--transition);
        }

        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 100%;
        }

        .btn-primary-sm {
            background: var(--cyan);
            color: var(--bg-deep);
            font-weight: 600;
            padding: 10px 22px;
            border-radius: var(--radius-md);
            font-size: 0.9rem;
            box-shadow: var(--shadow-glow);
            transition: all var(--transition);
        }

        .btn-primary-sm:hover {
            background: #33F5FF;
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.7);
            transform: translateY(-2px);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
        }

        .hamburger span {
            width: 28px;
            height: 2px;
            background: var(--cyan);
            transition: var(--transition);
        }

        /* Hero */
        .hero {
            padding: 160px 0 100px;
            min-height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: radial-gradient(circle at 30% 40%, rgba(0, 240, 255, 0.08) 0%, transparent 50%);
            pointer-events: none;
        }

        .particles {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
        }

        .particle {
            position: absolute;
            width: 4px;
            height: 4px;
            background: var(--cyan);
            border-radius: 50%;
            opacity: 0.4;
            animation: float 8s infinite alternate;
        }

        @keyframes float {
            0% {
                transform: translateY(0) translateX(0);
                opacity: 0.3;
            }
            100% {
                transform: translateY(-120px) translateX(40px);
                opacity: 0.8;
            }
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4rem;
            align-items: center;
            position: relative;
            z-index: 2;
        }

        .hero-content h1 {
            font-size: 3rem;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 1.5rem;
            color: #fff;
        }

        .hero-content h1 span {
            color: var(--cyan);
        }

        .hero-sub {
            font-size: 1.1rem;
            color: var(--text-muted);
            margin-bottom: 2rem;
            max-width: 80%;
        }

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

        .btn-ghost {
            background: transparent;
            border: 1px solid var(--cyan);
            color: var(--cyan);
            padding: 12px 28px;
            border-radius: var(--radius-md);
            font-weight: 600;
            transition: all var(--transition);
        }

        .btn-ghost:hover {
            background: rgba(0, 240, 255, 0.1);
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.3);
        }

        .hero-visual {
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            border-radius: var(--radius-lg);
            height: 400px;
            position: relative;
            border: 1px solid var(--border-subtle);
            box-shadow: var(--shadow-glass);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .live-indicator {
            position: absolute;
            top: 20px;
            right: 20px;
            background: rgba(10, 14, 39, 0.7);
            backdrop-filter: blur(8px);
            padding: 8px 16px;
            border-radius: 20px;
            display: flex;
            align-items: center;
            gap: 6px;
            color: var(--green);
            font-weight: 600;
            font-size: 0.9rem;
        }

        .live-dot {
            width: 10px;
            height: 10px;
            background: var(--green);
            border-radius: 50%;
            animation: pulse 1.5s infinite;
        }

        @keyframes pulse {
            0% {
                box-shadow: 0 0 0 0 rgba(0, 230, 118, 0.7);
            }
            70% {
                box-shadow: 0 0 0 8px rgba(0, 230, 118, 0);
            }
            100% {
                box-shadow: 0 0 0 0 rgba(0, 230, 118, 0);
            }
        }

        /* 指标看板 */
        .stats-section {
            padding: var(--section-gap) 0;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--card-gap);
        }

        .stat-card {
            background: rgba(30, 58, 95, 0.45);
            backdrop-filter: blur(16px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 28px 20px;
            text-align: center;
            box-shadow: var(--shadow-glass);
            transition: transform var(--transition);
        }

        .stat-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 240, 255, 0.4);
        }

        .stat-number {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--cyan);
            letter-spacing: -0.5px;
        }

        .stat-label {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-top: 8px;
        }

        .trend-bar {
            height: 4px;
            background: var(--purple);
            width: 60%;
            margin: 12px auto 0;
            border-radius: 4px;
        }

        /* 板块标题 */
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: #fff;
        }

        .section-sub {
            color: var(--text-muted);
            margin-bottom: 3rem;
            font-size: 1.05rem;
        }

        /* 服务矩阵 */
        .services-section {
            padding: var(--section-gap) 0;
        }

        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: var(--card-gap);
        }

        .service-card {
            background: rgba(30, 58, 95, 0.45);
            backdrop-filter: blur(16px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 32px;
            box-shadow: var(--shadow-glass);
            transition: all var(--transition);
        }

        .service-card:hover {
            transform: translateY(-6px);
            border-color: rgba(0, 240, 255, 0.5);
            box-shadow: 0 12px 36px rgba(0, 0, 0, 0.5);
        }

        .service-icon {
            width: 64px;
            height: 64px;
            background: rgba(0, 240, 255, 0.1);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
            color: var(--cyan);
            font-size: 2rem;
        }

        .service-card h3 {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
        }

        .service-desc {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-bottom: 1.5rem;
        }

        .tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }

        .tag {
            background: rgba(0, 240, 255, 0.1);
            color: var(--cyan);
            font-size: 0.75rem;
            padding: 4px 12px;
            border-radius: 20px;
        }

        /* 对比区 */
        .compare-section {
            padding: var(--section-gap) 0;
        }

        .compare-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
        }

        .compare-card {
            background: rgba(30, 58, 95, 0.45);
            backdrop-filter: blur(16px);
            border-radius: var(--radius-lg);
            padding: 32px;
            border: 1px solid var(--border-subtle);
        }

        .compare-card.right {
            border-color: rgba(0, 240, 255, 0.4);
            box-shadow: 0 0 24px rgba(0, 240, 255, 0.2);
        }

        .compare-item {
            display: flex;
            justify-content: space-between;
            padding: 12px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            color: var(--text-muted);
        }

        .compare-value.bad {
            color: var(--orange);
        }

        .compare-value.good {
            color: var(--green);
            font-weight: 600;
        }

        /* 流程 */
        .process-section {
            padding: var(--section-gap) 0;
        }

        .process-flow {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            gap: 1rem;
            flex-wrap: wrap;
        }

        .step {
            text-align: center;
            flex: 1;
            min-width: 180px;
            position: relative;
        }

        .step-circle {
            width: 48px;
            height: 48px;
            border: 2px solid var(--cyan);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1rem;
            font-weight: 700;
            color: #fff;
            background: var(--bg-deep);
        }

        .step h3 {
            font-size: 1.2rem;
            margin-bottom: 0.5rem;
        }

        .step p {
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        /* FAQ */
        .faq-section {
            padding: var(--section-gap) 0;
        }

        .faq-item {
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            margin-bottom: 0;
        }

        .faq-question {
            width: 100%;
            text-align: left;
            padding: 16px 0;
            font-weight: 600;
            font-size: 1.1rem;
            display: flex;
            justify-content: space-between;
            color: #fff;
            background: transparent;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
            color: var(--text-muted);
            padding: 0;
        }

        .faq-item.active .faq-answer {
            max-height: 200px;
            padding-bottom: 16px;
        }

        /* CTA */
        .cta-section {
            padding: var(--section-gap) 0;
            background: #070b1a;
            text-align: center;
            position: relative;
        }

        .cta-glow {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.1) 0%, transparent 70%);
            pointer-events: none;
        }

        .btn-large {
            background: var(--cyan);
            color: var(--bg-deep);
            font-weight: 700;
            padding: 16px 40px;
            border-radius: var(--radius-md);
            font-size: 1.2rem;
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.6);
            animation: breathe 2s infinite;
            display: inline-block;
            margin: 2rem 0 1rem;
        }

        @keyframes breathe {
            0%,
            100% {
                box-shadow: 0 0 25px rgba(0, 240, 255, 0.5);
            }
            50% {
                box-shadow: 0 0 45px rgba(0, 240, 255, 0.9);
            }
        }

        .trust-badges {
            display: flex;
            gap: 2rem;
            justify-content: center;
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-top: 1.5rem;
        }

        /* Footer */
        .footer {
            background: #0A0E27;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 3rem 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2rem;
        }

        .footer-logo {
            font-weight: 700;
            font-size: 1.4rem;
            margin-bottom: 1rem;
        }

        .footer-desc {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-bottom: 1rem;
        }

        .footer h4 {
            color: #fff;
            margin-bottom: 1rem;
        }

        .footer ul {
            list-style: none;
        }

        .footer li {
            margin-bottom: 0.5rem;
        }

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

        .copyright {
            text-align: center;
            color: var(--text-muted);
            font-size: 0.75rem;
            margin-top: 2rem;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .hero-visual {
                height: 300px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .compare-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: fixed;
                top: 0;
                left: 0;
                width: 100%;
                height: 100vh;
                background: var(--bg-deep);
                flex-direction: column;
                justify-content: center;
                gap: 2rem;
                z-index: 999;
            }
            .nav-links.active {
                display: flex;
            }
            .hamburger {
                display: flex;
                z-index: 1001;
            }
            .hero-content h1 {
                font-size: 2.2rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 520px) {
            .hero-buttons {
                flex-direction: column;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }