/* roulang page: index */
:root {
            --primary: #0F172A;
            --accent: #6366F1;
            --accent-hover: #4F46E5;
            --bg-base: #FAFAFA;
            --card-base: #FFFFFF;
            --text-main: #0F172A;
            --text-sub: #475569;
            --border-line: #E2E8F0;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-base);
            color: var(--text-main);
            overflow-x: hidden;
        }
        .hero-mask {
            background: linear-gradient(180deg, rgba(11, 15, 25, 0.75) 0%, rgba(11, 15, 25, 0.95) 100%);
        }
        .tabular-font {
            font-variant-numeric: tabular-nums;
        }
        .smooth-scroll {
            scroll-behavior: smooth;
        }