/* roulang page: index */
:root {
            --bg-deep: #0A1929;
            --bg-card: #0D2B45;
            --accent-cyan: #00E5FF;
            --accent-orange: #FF6B35;
            --text-primary: #FFFFFF;
            --text-secondary: #B0C4DE;
            --text-muted: #7A8FA6;
            --border-glow: rgba(0, 229, 255, 0.15);
            --border-strong: rgba(0, 229, 255, 0.35);
            --glass-bg: rgba(13, 43, 69, 0.6);
            --glass-blur: blur(12px);
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 20px rgba(0, 229, 255, 0.5);
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
            --transition-base: all 0.3s ease;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 80px;
        }

        body {
            font-family: var(--font-sans);
            font-weight: 400;
            line-height: 1.7;
            color: var(--text-secondary);
            background-color: var(--bg-deep);
            background-image: radial-gradient(circle at 25% 25%, rgba(0, 229, 255, 0.03) 0%, transparent 50%),
                radial-gradient(circle at 75% 80%, rgba(0, 229, 255, 0.04) 0%, transparent 50%);
            background-attachment: fixed;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            letter-spacing: -0.02em;
            line-height: 1.2;
            color: var(--text-primary);
        }

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

        a:hover {
            color: #66F0FF;
        }

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

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

        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* 数据数字 */
        .stat-number, .data-digit {
            font-feature-settings: "tnum";
            font-weight: 600;
            letter-spacing: 0;
        }

        /* 导航栏 */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1030;
            padding: 16px 0;
            transition: var(--transition-base);
            background: transparent;
            backdrop-filter: none;
        }

        .navbar.scrolled {
            background: rgba(10, 25, 41, 0.95);
            backdrop-filter: var(--glass-blur);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
            padding: 10px 0;
        }

        .navbar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.01em;
        }

        .navbar-brand .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--accent-cyan), #00B8D4);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--bg-deep);
            box-shadow: 0 0 12px rgba(0, 229, 255, 0.3);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-links a {
            color: rgba(255, 255, 255, 0.85);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition-base);
            position: relative;
            padding: 4px 0;
            white-space: nowrap;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-cyan);
            transition: width 0.25s ease;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: #fff;
        }

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

        .btn-nav-cta {
            background: var(--accent-cyan);
            color: var(--bg-deep);
            font-weight: 700;
            padding: 10px 22px;
            border-radius: 50px;
            border: none;
            font-size: 0.9rem;
            transition: var(--transition-base);
            white-space: nowrap;
            cursor: pointer;
            text-decoration: none;
            display: inline-block;
        }

        .btn-nav-cta:hover {
            background: #33F0FF;
            box-shadow: var(--shadow-glow);
            color: var(--bg-deep);
            transform: translateY(-1px);
        }

        .navbar-toggler {
            border: none;
            padding: 4px;
            background: transparent;
            color: #fff;
            font-size: 1.5rem;
            display: none;
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 70px;
            left: 0;
            width: 100%;
            background: rgba(10, 25, 41, 0.98);
            backdrop-filter: blur(20px);
            flex-direction: column;
            padding: 20px;
            gap: 16px;
            border-bottom: 1px solid var(--border-glow);
            z-index: 1029;
        }

        .mobile-menu.active {
            display: flex;
        }

        .mobile-menu a {
            color: rgba(255, 255, 255, 0.9);
            font-size: 1.1rem;
            padding: 8px 0;
        }

        /* 区块通用 */
        section {
            padding: 90px 0;
            position: relative;
        }

        .section-label {
            font-size: 0.85rem;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--accent-cyan);
            margin-bottom: 12px;
            font-weight: 600;
        }

        .section-title {
            font-size: 2.5rem;
            margin-bottom: 16px;
        }

        .section-desc {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 700px;
        }

        /* Hero */
        #hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            padding-top: 100px;
            padding-bottom: 60px;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            position: relative;
        }

        #hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 25, 41, 0.85) 20%, rgba(10, 25, 41, 0.6) 80%);
            z-index: 1;
        }

        #hero .container {
            position: relative;
            z-index: 2;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .hero-left h1 {
            font-size: 3.2rem;
            margin-bottom: 18px;
            line-height: 1.15;
        }

        .hero-left .highlight {
            color: var(--accent-cyan);
        }

        .hero-subtitle {
            font-size: 1.2rem;
            color: var(--text-secondary);
            margin-bottom: 28px;
        }

        .hero-stats {
            display: flex;
            gap: 30px;
            margin-bottom: 32px;
            flex-wrap: wrap;
        }

        .hero-stat-item {
            display: flex;
            align-items: baseline;
            gap: 6px;
        }

        .hero-stat-value {
            font-size: 2rem;
            font-weight: 700;
            color: var(--accent-cyan);
            font-feature-settings: "tnum";
        }

        .hero-stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        .hero-cta-group {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .btn-primary-glow {
            background: var(--accent-cyan);
            color: var(--bg-deep);
            font-weight: 700;
            padding: 14px 32px;
            border-radius: 50px;
            border: none;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition-base);
            text-decoration: none;
            display: inline-block;
        }

        .btn-primary-glow:hover {
            box-shadow: var(--shadow-glow);
            transform: translateY(-2px);
            color: var(--bg-deep);
            background: #33F0FF;
        }

        .btn-outline-glow {
            background: transparent;
            color: #fff;
            font-weight: 600;
            padding: 14px 32px;
            border-radius: 50px;
            border: 2px solid rgba(255, 255, 255, 0.4);
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition-base);
            text-decoration: none;
            display: inline-block;
        }

        .btn-outline-glow:hover {
            border-color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.08);
            color: #fff;
        }

        .hero-right {
            display: flex;
            flex-direction: column;
            gap: 18px;
        }

        .glass-score-card {
            background: var(--glass-bg);
            backdrop-filter: var(--glass-blur);
            border-radius: var(--radius-lg);
            padding: 20px 24px;
            border: 1px solid var(--border-glow);
            box-shadow: var(--shadow-lg);
            animation: floatCard 5s ease-in-out infinite;
        }

        .glass-score-card:nth-child(2) {
            animation-delay: 0.7s;
        }

        .glass-score-card:nth-child(3) {
            animation-delay: 1.4s;
        }

        @keyframes floatCard {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-8px); }
        }

        .score-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .team-name {
            font-weight: 600;
            color: #fff;
            font-size: 1rem;
        }

        .score-display {
            font-size: 2rem;
            font-weight: 700;
            color: var(--accent-orange);
            font-feature-settings: "tnum";
        }

        .live-badge {
            background: #FF3B30;
            color: #fff;
            padding: 3px 10px;
            border-radius: 50px;
            font-size: 0.7rem;
            font-weight: 700;
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.6; }
        }

        /* Features */
        #features {
            background: rgba(13, 43, 69, 0.25);
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            margin-top: 40px;
        }

        .feature-card {
            background: var(--glass-bg);
            backdrop-filter: var(--glass-blur);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            text-align: center;
            transition: var(--transition-base);
        }

        .feature-card:hover {
            border-color: var(--border-strong);
            box-shadow: 0 8px 28px rgba(0, 229, 255, 0.12);
            transform: translateY(-4px);
        }

        .feature-icon {
            font-size: 2.4rem;
            color: var(--accent-cyan);
            margin-bottom: 16px;
        }

        .feature-value {
            font-size: 2.6rem;
            font-weight: 700;
            color: #fff;
            font-feature-settings: "tnum";
        }

        .feature-label {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-top: 6px;
        }

        /* Solutions 瀑布流 */
        #solutions .masonry-grid {
            columns: 3;
            column-gap: 24px;
            margin-top: 40px;
        }

        .solution-card {
            break-inside: avoid;
            background: var(--glass-bg);
            backdrop-filter: var(--glass-blur);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 28px;
            margin-bottom: 24px;
            transition: var(--transition-base);
            position: relative;
        }

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

        .solution-icon {
            font-size: 2rem;
            color: var(--accent-cyan);
            margin-bottom: 16px;
        }

        .solution-card h3 {
            font-size: 1.3rem;
            margin-bottom: 10px;
        }

        .solution-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 14px;
        }

        .tag {
            background: rgba(0, 229, 255, 0.1);
            color: var(--accent-cyan);
            padding: 4px 12px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            border: 1px solid rgba(0, 229, 255, 0.2);
        }

        /* Compare */
        #compare {
            background: rgba(13, 43, 69, 0.2);
        }

        .compare-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            margin-top: 40px;
        }

        .compare-card {
            border-radius: var(--radius-md);
            padding: 36px 28px;
            border: 1px solid var(--border-glow);
            background: var(--glass-bg);
            backdrop-filter: var(--glass-blur);
        }

        .compare-card.traditional {
            border-color: rgba(255, 255, 255, 0.08);
            background: rgba(30, 40, 55, 0.5);
        }

        .compare-card.best {
            border-color: var(--border-strong);
            box-shadow: 0 0 28px rgba(0, 229, 255, 0.08);
            background: rgba(0, 229, 255, 0.04);
        }

        .compare-title {
            font-size: 1.4rem;
            margin-bottom: 20px;
        }

        .compare-list {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .compare-list li {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .compare-list i {
            font-size: 1.2rem;
        }

        .text-cyan {
            color: var(--accent-cyan);
        }

        /* FAQ */
        .accordion-button {
            background: var(--glass-bg);
            color: #fff;
            font-weight: 600;
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            padding: 18px 24px;
            font-size: 1.05rem;
            backdrop-filter: var(--glass-blur);
        }

        .accordion-button:not(.collapsed) {
            background: rgba(0, 229, 255, 0.08);
            color: #fff;
            border-left: 4px solid var(--accent-cyan);
        }

        .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.25);
        }

        .accordion-body {
            background: rgba(13, 43, 69, 0.5);
            color: var(--text-secondary);
            border-radius: 0 0 var(--radius-md) var(--radius-md);
            padding: 20px 24px;
        }

        /* Contact */
        #contact {
            background: #060E18;
        }

        .contact-form input,
        .contact-form textarea {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-sm);
            color: #fff;
            padding: 14px 16px;
            transition: var(--transition-base);
            width: 100%;
        }

        .contact-form input:focus,
        .contact-form textarea:focus {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.15);
            outline: none;
        }

        .btn-submit {
            background: var(--accent-cyan);
            color: var(--bg-deep);
            font-weight: 700;
            padding: 14px 28px;
            border: none;
            border-radius: 50px;
            width: 100%;
            transition: var(--transition-base);
        }

        .btn-submit:hover {
            box-shadow: var(--shadow-glow);
        }

        /* Footer */
        footer {
            background: #060E18;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 40px 0;
        }

        .footer-links a {
            color: var(--text-muted);
            margin-right: 20px;
            font-size: 0.9rem;
        }

        .footer-links a:hover {
            color: var(--accent-cyan);
        }

        /* 响应式 */
        @media (max-width: 992px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .hero-right {
                flex-direction: row;
                flex-wrap: wrap;
            }
            .glass-score-card {
                flex: 1 1 140px;
            }
            #solutions .masonry-grid {
                columns: 2;
            }
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .compare-wrapper {
                grid-template-columns: 1fr;
            }
            .section-title {
                font-size: 2rem;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .navbar-toggler {
                display: block;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            #solutions .masonry-grid {
                columns: 1;
            }
            .hero-left h1 {
                font-size: 2.4rem;
            }
            section {
                padding: 60px 0;
            }
        }

        @media (max-width: 520px) {
            .hero-stats {
                gap: 16px;
            }
            .hero-cta-group {
                flex-direction: column;
            }
        }