/* roulang page: index */
:root {
            --primary: #0E1E2E;
            --accent: #F59E0B;
            --neon: #06B6D4;
            --bg-light: #F8FAFC;
            --text-dark: #0F172A;
            --text-gray: #334155;
            --border-light: rgba(226, 232, 240, 0.8);
        }
        * { box-sizing: border-box; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--text-gray);
            background-color: #ffffff;
            line-height: 1.75;
            overflow-x: hidden;
        }
        html { scroll-behavior: smooth; }
        .hero-bg {
            background-image: linear-gradient(to right, rgba(14, 30, 46, 0.95), rgba(14, 30, 46, 0.85)), url('/assets/images/347dac2ab88b4762.png');
            background-size: cover;
            background-position: center;
        }
        .matrix-pattern {
            background-image: radial-gradient(rgba(245, 158, 11, 0.15) 1px, transparent 0);
            background-size: 24px 24px;
        }
        .card-hover {
            transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s ease;
        }
        .card-hover:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 24px -10px rgba(245, 158, 11, 0.18);
        }
        details > summary { list-style: none; }
        details > summary::-webkit-details-marker { display: none; }
        details[open] summary svg { transform: rotate(180deg); }