/* roulang page: index */
:root {
            --primary: #00D285;
            --bg-base: #0A0E17;
            --bg-surface: #131B2A;
            --bg-card: #1C2638;
            --text-main: #F4F6FB;
            --text-sub: #A5B4CB;
            --border-line: rgba(255, 255, 255, 0.08);
        }
        * {
            box-sizing: border-box;
            scroll-behavior: smooth;
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
            background-color: var(--bg-base);
            color: var(--text-sub);
            line-height: 1.75;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            color: var(--text-main);
            line-height: 1.35;
        }
        .backdrop-nav {
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }
        .glow-border:hover {
            border-color: rgba(0, 210, 133, 0.4);
            box-shadow: 0 0 20px rgba(0, 210, 133, 0.15);
        }
        .code-screen {
            background: linear-gradient(180deg, #162032 0%, #0c1322 100%);
            border: 1px solid var(--border-line);
        }