/* roulang page: index */
:root {
            --primary: #1A56DB;
            --accent: #0EA5E9;
            --bg-light: #F8FAFC;
            --text-main: #0F172A;
            --text-muted: #64748B;
        }
        body {
            font-family: var(--font-sans, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif);
            background-color: var(--bg-light);
            color: var(--text-main);
            overflow-x: hidden;
        }
        .soft-shadow {
            box-shadow: 0 4px 24px -4px rgba(15, 23, 42, 0.06);
        }
        .soft-shadow-hover {
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .soft-shadow-hover:hover {
            transform: translateY(-4px);
            box-shadow: 0 16px 32px -6px rgba(26, 86, 219, 0.12);
        }
        .glow-border {
            border: 1px solid rgba(14, 165, 233, 0.2);
        }