/* roulang page: index */
:root {
            --primary: #4F46E5;
            --primary-hover: #4338CA;
            --accent-green: #10B981;
            --canvas-light: #F8FAFC;
            --canvas-white: #FFFFFF;
            --canvas-dark: #0B0F19;
            --border-light: rgba(226, 232, 240, 0.85);
            --border-dark: rgba(255, 255, 255, 0.12);
            --text-main: #0F172A;
            --text-muted: #64748B;
        }

        body {
            font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--text-main);
            background-color: var(--canvas-light);
            -webkit-font-smoothing: antialiased;
        }

        .num-font {
            font-variant-numeric: tabular-nums;
            font-feature-settings: "tnum";
        }

        /* 极细边框与微妙投影 */
        .glass-nav {
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            background-color: rgba(255, 255, 255, 0.88);
            border-bottom: 1px solid var(--border-light);
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            padding: 0.25rem 0.75rem;
            font-size: 0.8125rem;
            font-weight: 600;
            border-radius: 9999px;
            letter-spacing: 0.05em;
        }

        .card-hover-effect {
            transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .card-hover-effect:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 30px -10px rgba(15, 23, 42, 0.08);
        }