/* roulang page: index */
:root {
            --primary: #0A192F;
            --primary-dark: #050B14;
            --accent: #00D2A0;
            --accent-hover: #00b386;
            --text-main: #0F172A;
            --text-muted: #334155;
            --text-light: #64748B;
            --bg-light: #F8FAFC;
            --border-color: #E2E8F0;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--text-main);
            background-color: #FFFFFF;
            overflow-x: hidden;
        }

        .bg-mesh-tech {
            background-color: #050B14;
            background-image: radial-gradient(rgba(0, 210, 160, 0.08) 1px, transparent 1px), radial-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px);
            background-size: 32px 32px;
            background-position: 0 0, 16px 16px;
        }

        .hero-clip-bg {
            background-image: linear-gradient(to right, rgba(5, 11, 20, 0.94) 0%, rgba(10, 25, 47, 0.88) 100%), url('/assets/images/0a3f50833109e5cb.webp');
            background-size: cover;
            background-position: center;
        }

        .card-elevated {
            transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
        }
        .card-elevated:hover {
            transform: translateY(-4px);
            box-shadow: 0 16px 30px -10px rgba(10, 25, 47, 0.12);
            border-color: rgba(0, 210, 160, 0.5);
        }

        .tab-btn.active {
            color: #00D2A0;
            border-color: #00D2A0;
            background-color: rgba(0, 210, 160, 0.08);
        }

        .accordion-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
        }
        .accordion-item.active .accordion-content {
            max-height: 280px;
        }
        .accordion-item.active .accordion-arrow {
            transform: rotate(180deg);
        }