/* roulang page: index */
:root {
            --bg-deep: #0A1929;
            --bg-mid: #0F2744;
            --bg-light: #1A3A5C;
            --cyan: #00E5FF;
            --cyan-hover: #33EAFF;
            --purple: #6C3CE0;
            --white: #FFFFFF;
            --white-70: rgba(255,255,255,0.7);
            --white-50: rgba(255,255,255,0.5);
            --white-15: rgba(255,255,255,0.15);
            --white-08: rgba(255,255,255,0.08);
            --glass-bg: rgba(15,39,68,0.6);
            --glass-bg-light: rgba(10,25,41,0.75);
            --glass-bg-subtle: rgba(255,255,255,0.03);
            --radius: 16px;
            --radius-sm: 10px;
            --radius-pill: 30px;
            --shadow-card: 0 8px 32px rgba(0,0,0,0.4);
            --font-title: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --font-body: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --transition: all 0.25s ease;
            --spacing-sm: 16px;
            --spacing-md: 32px;
            --spacing-lg: 64px;
            --spacing-xl: 120px;
            --max-width: 1200px;
            color-scheme: dark;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: var(--font-body);
            background: radial-gradient(circle at 30% 10%, #0F2744 0%, #0A1929 70%);
            color: var(--white);
            line-height: 1.5;
            min-height: 100vh;
            overflow-x: hidden;
            position: relative;
        }

        body::before {
            content: "";
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            background-image: repeating-linear-gradient(0deg, rgba(255,255,255,0.02) 0px, rgba(255,255,255,0.02) 1px, transparent 1px, transparent 60px), repeating-linear-gradient(90deg, rgba(255,255,255,0.02) 0px, rgba(255,255,255,0.02) 1px, transparent 1px, transparent 60px);
            z-index: -2;
        }

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

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

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

        .container-custom {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }

        /* 导航栏 - 卡片化玻璃面板 */
        .glass-nav {
            background: var(--glass-bg-light);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0,229,255,0.2);
            border-radius: 0 0 var(--radius) var(--radius);
            box-shadow: 0 8px 30px rgba(0,0,0,0.5);
            padding: 12px 0;
            position: fixed;
            top: 16px;
            left: 50%;
            transform: translateX(-50%);
            width: calc(100% - 32px);
            max-width: var(--max-width);
            z-index: 1000;
            transition: var(--transition);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }

        .logo-text {
            font-family: var(--font-title);
            font-size: 1.6rem;
            font-weight: 700;
            letter-spacing: 1px;
            color: var(--white);
        }

        .logo-text span {
            color: var(--cyan);
            text-shadow: 0 0 12px rgba(0,229,255,0.7);
        }

        .nav-icon-cards {
            display: flex;
            gap: 8px;
            align-items: center;
        }

        .nav-icon-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            background: rgba(255,255,255,0.04);
            border-radius: var(--radius-sm);
            padding: 8px 12px;
            color: var(--white-70);
            font-size: 0.8rem;
            font-weight: 500;
            transition: var(--transition);
            border: 1px solid transparent;
            min-width: 54px;
            cursor: pointer;
        }

        .nav-icon-item i {
            font-size: 1.1rem;
            margin-bottom: 2px;
            color: var(--cyan);
        }

        .nav-icon-item:hover {
            background: rgba(0,229,255,0.15);
            border-color: rgba(0,229,255,0.3);
            color: var(--white);
            transform: translateY(-1px);
        }

        .btn-cta {
            background: linear-gradient(135deg, #00E5FF 0%, #00B8D4 100%);
            border: none;
            color: #0A1929;
            font-weight: 700;
            padding: 10px 22px;
            border-radius: var(--radius-pill);
            font-size: 0.9rem;
            letter-spacing: 0.5px;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 4px 16px rgba(0,229,255,0.5);
            text-transform: uppercase;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .btn-cta:hover {
            filter: brightness(1.3);
            box-shadow: 0 0 28px rgba(0,229,255,0.8);
            transform: scale(1.03);
            color: #0A1929;
        }

        .btn-cta:active {
            transform: scale(0.97);
        }

        .btn-outline {
            background: transparent;
            border: 1.5px solid var(--cyan);
            color: var(--cyan);
            padding: 10px 22px;
            border-radius: var(--radius-pill);
            font-weight: 600;
            transition: var(--transition);
            cursor: pointer;
        }

        .btn-outline:hover {
            background: rgba(0,229,255,0.1);
            color: var(--white);
        }

        .hamburger {
            display: none;
            font-size: 1.8rem;
            color: var(--cyan);
            cursor: pointer;
            background: transparent;
            border: none;
        }

        /* Hero */
        #hero {
            padding-top: 150px;
            padding-bottom: 100px;
            position: relative;
        }

        .hero-grid {
            display: flex;
            align-items: center;
            gap: 48px;
        }

        .hero-left {
            flex: 1;
        }

        .hero-title {
            font-family: var(--font-title);
            font-size: 3.2rem;
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: 24px;
        }

        .hero-title span {
            color: var(--cyan);
            text-shadow: 0 0 20px rgba(0,229,255,0.6);
        }

        .hero-sub {
            font-size: 1.2rem;
            color: var(--white-70);
            margin-bottom: 36px;
            line-height: 1.6;
            max-width: 540px;
        }

        .hero-buttons {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }

        .hero-right {
            flex: 1;
            position: relative;
            display: flex;
            justify-content: center;
        }

        .hero-visual {
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            width: 100%;
            height: 380px;
            border-radius: var(--radius);
            box-shadow: 0 0 40px rgba(0,229,255,0.35);
            border: 1px solid rgba(0,229,255,0.25);
            backdrop-filter: blur(10px);
            position: relative;
            overflow: hidden;
        }

        .hero-visual::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10,25,41,0.4) 0%, rgba(0,229,255,0.2) 100%);
        }

        /* 通用板块标题 */
        .section-title {
            font-family: var(--font-title);
            font-size: 2.4rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--white);
        }

        .section-desc {
            font-size: 1.1rem;
            color: var(--white-70);
            margin-bottom: 48px;
            max-width: 700px;
        }

        /* 玻璃卡片 */
        .glass-card {
            background: var(--glass-bg);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-radius: var(--radius);
            border: 1px solid var(--white-08);
            padding: var(--spacing-md);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            color: var(--white);
        }

        .glass-card:hover {
            transform: translateY(-6px);
            box-shadow: 0 16px 40px rgba(0,229,255,0.25);
            border-color: rgba(0,229,255,0.2);
        }

        /* 价值卡片 */
        .value-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            margin-top: 32px;
        }

        .value-icon {
            font-size: 2.2rem;
            color: var(--cyan);
            margin-bottom: 16px;
        }

        /* 功能行 */
        .capability-row {
            display: flex;
            align-items: center;
            gap: 48px;
            margin-bottom: 80px;
        }

        .capability-row.reverse {
            flex-direction: row-reverse;
        }

        .cap-text {
            flex: 1;
        }

        .cap-image {
            flex: 1;
            background-size: cover;
            background-position: center;
            height: 280px;
            border-radius: var(--radius);
            box-shadow: 0 0 24px rgba(0,229,255,0.2);
            border: 1px solid rgba(255,255,255,0.1);
        }

        /* 场景卡片 */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .scenario-img {
            height: 180px;
            background-size: cover;
            background-position: center;
            border-radius: var(--radius) var(--radius) 0 0;
        }

        /* 案例卡片 */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .case-card {
            background: rgba(15,39,68,0.35);
            backdrop-filter: blur(12px);
            border-radius: var(--radius);
            padding: 24px;
            display: flex;
            gap: 20px;
            align-items: center;
        }

        .case-avatar {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: var(--cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            font-size: 1.5rem;
            color: #0A1929;
        }

        /* 价格卡 */
        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .pricing-card.recommended {
            border: 2px solid var(--cyan);
            box-shadow: 0 0 28px rgba(0,229,255,0.4);
            position: relative;
        }

        .badge {
            background: var(--cyan);
            color: #0A1929;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 700;
            position: absolute;
            top: -12px;
            right: 20px;
        }

        /* FAQ */
        .accordion-item {
            background: rgba(255,255,255,0.03);
            border-bottom: 1px solid rgba(255,255,255,0.05);
            margin-bottom: 8px;
            border-radius: var(--radius-sm);
            overflow: hidden;
        }

        .accordion-title {
            padding: 20px 24px;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 14px;
            color: var(--white);
        }

        .accordion-title span {
            color: var(--cyan);
            font-weight: 700;
            font-size: 1.2rem;
        }

        .accordion-content {
            padding: 0 24px 20px;
            color: var(--white-70);
            display: none;
        }

        .accordion-item.active .accordion-content {
            display: block;
        }

        .accordion-item.active {
            background: rgba(255,255,255,0.06);
        }

        /* CTA横幅 */
        .cta-banner {
            background: #060F1A;
            text-align: center;
            padding: 80px 20px;
            border-radius: var(--radius);
            margin: 60px 0;
        }

        /* 页脚 */
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 36px;
            padding: 56px 0 32px;
        }

        .copyright {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 20px;
            text-align: center;
            color: var(--white-50);
            font-size: 0.9rem;
        }

        @media (max-width: 1024px) {
            .hero-grid {
                flex-direction: column;
            }
            .value-grid,
            .scenario-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .capability-row {
                flex-direction: column;
            }
            .capability-row.reverse {
                flex-direction: column;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 640px) {
            .nav-icon-cards {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .glass-nav {
                top: 8px;
                width: calc(100% - 20px);
            }
            .hero-title {
                font-size: 2.2rem;
            }
            .value-grid,
            .scenario-grid,
            .pricing-grid {
                grid-template-columns: 1fr;
            }
            .cases-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .hero-visual {
                height: 240px;
            }
        }

        .mobile-menu {
            display: none;
            flex-direction: column;
            background: var(--glass-bg-light);
            backdrop-filter: blur(20px);
            padding: 20px;
            border-radius: var(--radius);
            margin-top: 12px;
        }

        .mobile-menu a {
            padding: 12px 0;
            border-bottom: 1px solid rgba(255,255,255,0.08);
            color: var(--white-70);
        }