/* roulang page: index */
:root {
            --primary: #0B1926;
            --abyss: #070F18;
            --accent: #00C2A8;
            --accent-hover: #00a892;
            --tech-blue: #2C3E50;
            --text-main: #334155;
            --border-color: rgba(226, 232, 240, 0.8);
        }
        body {
            font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--text-main);
            background-color: #F8FAFC;
            overflow-x: hidden;
        }
        .hero-pattern {
            background-image: radial-gradient(rgba(0, 194, 168, 0.12) 1px, transparent 1px);
            background-size: 28px 28px;
        }
        .accordion-content {
            transition: max-height 0.3s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease;
            max-height: 0;
            opacity: 0;
            overflow: hidden;
        }
        .accordion-content.active {
            max-height: 500px;
            opacity: 1;
        }
        .glass-header {
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }