/* roulang page: index */
:root {
            --bg-base: #0A0D14;
            --bg-card: #121722;
            --brand-cyan: #00F0FF;
            --accent-purple: #7928CA;
            --accent-orange: #FF5500;
            --text-main: #FFFFFF;
            --text-muted: #94A3B8;
            --border-dim: rgba(255, 255, 255, 0.08);
            --border-cyan: rgba(0, 240, 255, 0.3);
        }
        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-base);
            color: var(--text-main);
        }
        .mono-num {
            font-variant-numeric: tabular-nums;
            font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
        }
        .card-glow {
            border: 1px solid var(--border-dim);
            transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .card-glow:hover {
            transform: translateY(-4px);
            border-color: var(--border-cyan);
            box-shadow: 0 10px 30px -10px rgba(0, 240, 255, 0.15);
        }
        .hero-bg {
            background-image: linear-gradient(to right, rgba(10, 13, 20, 0.95) 30%, rgba(10, 13, 20, 0.8) 70%, rgba(10, 13, 20, 0.95)), url('/assets/images/6e3141ff6c7d5e98.jpg');
            background-size: cover;
            background-position: center;
        }
        .sub-bg-banner {
            background-image: linear-gradient(rgba(10, 13, 20, 0.92), rgba(10, 13, 20, 0.92)), url('/assets/images/a764a25588be46ce.jpg');
            background-size: cover;
            background-position: center;
        }