/* roulang page: index */
:root {
            --bg-base: #FFFFFF;
            --bg-alt: #F8FAFC;
            --bg-dark: #0B1120;
            --brand-primary: #0F2942;
            --brand-pass: #10B981;
            --brand-warn: #D97706;
            --text-main: #1E293B;
            --text-muted: #64748B;
            --border-soft: #E2E8F0;
        }
        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
        }
        body {
            color: var(--text-main);
            background-color: var(--bg-base);
            overflow-x: hidden;
            line-height: 1.75;
        }
        .section-separator {
            border-top: 1px solid var(--border-soft);
        }
        .hero-bg {
            background-image: linear-gradient(rgba(11, 17, 32, 0.88), rgba(11, 17, 32, 0.94)), url('/assets/images/a8c3adda49f447d3.png');
            background-size: cover;
            background-position: center;
        }
        .code-block {
            background: #070D18;
            font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
        }