/* roulang page: index */
:root {
            --bg-deep: #070B19;
            --bg-elevated: #0B132B;
            --primary: #1E6FFF;
            --cyan-glow: #00E5FF;
            --accent-purple: #7928CA;
            --text-main: #FFFFFF;
            --text-sub: #94A3B8;
            --text-muted: #64748B;
            --card-glass: rgba(15, 23, 42, 0.72);
            --border-glass: rgba(255, 255, 255, 0.08);
            --border-hover: rgba(0, 229, 255, 0.35);
        }
        
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-deep);
            color: var(--text-main);
        }

        body {
            overflow-x: hidden;
            line-height: 1.6;
            background: linear-gradient(180deg, #070B19 0%, #0B132B 50%, #060913 100%);
        }

        .container-custom {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        .glass-panel {
            background: var(--card-glass);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
            border-radius: 1rem;
            transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }

        .glass-panel:hover {
            border-color: var(--border-hover);
            transform: translateY(-2px);
            box-shadow: 0 12px 30px -10px rgba(0, 229, 255, 0.15);
        }

        .glow-btn-primary {
            background: linear-gradient(135deg, var(--primary) 0%, #00B4D8 100%);
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.3);
            transition: all 0.25s ease;
        }

        .glow-btn-primary:hover {
            box-shadow: 0 0 28px rgba(0, 229, 255, 0.55);
            transform: translateY(-2px);
            filter: brightness(1.1);
        }

        .glow-btn-outline {
            border: 1px solid rgba(0, 229, 255, 0.5);
            background: rgba(0, 229, 255, 0.05);
            transition: all 0.25s ease;
        }

        .glow-btn-outline:hover {
            background: rgba(0, 229, 255, 0.15);
            border-color: var(--cyan-glow);
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.25);
        }

        .badge-cyan {
            background: rgba(0, 229, 255, 0.1);
            border: 1px solid rgba(0, 229, 255, 0.3);
            color: var(--cyan-glow);
        }

        .badge-purple {
            background: rgba(121, 40, 202, 0.15);
            border: 1px solid rgba(121, 40, 202, 0.4);
            color: #C084FC;
        }

        .section-separator {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            position: relative;
        }

        .section-separator::after {
            content: '';
            position: absolute;
            top: -1px;
            left: 50%;
            transform: translateX(-50%);
            width: 300px;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--cyan-glow), transparent);
        }

        .carousel-slide {
            display: none;
            opacity: 0;
            transition: opacity 0.5s ease-in-out;
        }

        .carousel-slide.active {
            display: block;
            opacity: 1;
        }

        .faq-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease-out;
        }

        .faq-item.active .faq-body {
            max-height: 220px;
        }

        .faq-item.active .faq-icon {
            transform: rotate(180deg);
            color: var(--cyan-glow);
        }

        /* 移动端抽屉过渡 */
        #mobileDrawer {
            transition: transform 0.3s ease-in-out;
        }