/* roulang page: index */
:root {
            --brand-primary: #0284c7;
            --brand-primary-hover: #0369a1;
            --brand-dark: #0b1120;
            --brand-card-bg: #111c38;
            --brand-text-muted: #94a3b8;
            --brand-border: #1e293b;
        }

        body {
            background-color: #060b18;
            color: #f1f5f9;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
            scroll-behavior: smooth;
        }

        /* 玻璃拟态与流光边框 */
        .glass-nav {
            background: rgba(6, 11, 24, 0.85);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .glass-card {
            background: rgba(17, 28, 56, 0.65);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.06);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .glass-card:hover {
            border-color: rgba(56, 189, 248, 0.4);
            transform: translateY(-4px);
            box-shadow: 0 12px 30px -10px rgba(2, 132, 199, 0.3);
        }

        .text-glow {
            text-shadow: 0 0 20px rgba(56, 189, 248, 0.35);
        }

        .hero-banner-mask {
            background: linear-gradient(180deg, rgba(6, 11, 24, 0.4) 0%, rgba(6, 11, 24, 0.95) 85%, #060b18 100%);
        }

        /* 滚动条定制 */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: #060b18;
        }
        ::-webkit-scrollbar-thumb {
            background: #1e293b;
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: #38bdf8;
        }