:root{--bg:#fafaf8;--surface:#fff;--ink:#1a1a1a;--muted:#6b6b6b;--accent:#4f46e5;--line:#e8e6e1;--live:#16a34a;--font-serif:"Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;--font-sans:"Noto Sans SC", "PingFang SC", "Microsoft YaHei", -apple-system, "Segoe UI", sans-serif;--header-h:64px}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:var(--header-h)}body{font-family:var(--font-sans);background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased;text-rendering:optimizelegibility;margin:0;line-height:1.7}h1,h2,h3{font-family:var(--font-serif);margin:0;font-weight:600}a{color:var(--accent);text-decoration:none}.container{width:min(1080px,92vw);margin-inline:auto}.site-header{height:var(--header-h);z-index:50;-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--line);background:#fafaf8d9;position:fixed;inset:0 0 auto}.site-header 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