:root{--bg: #0f1216;--bg-soft: #161b22;--card: #1c2129;--border: #2a313c;--text: #e6edf3;--muted: #8b949e;--accent: #58a6ff;--accent-2: #3fb950;--warn: #d29922;--radius: 10px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;font-size:15px;line-height:1.7;-webkit-font-smoothing:antialiased}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.wrap{max-width:1080px;margin:0 auto;padding:0 20px}.site-header{border-bottom:1px solid var(--border);background:var(--bg-soft);position:sticky;top:0;z-index:50}.site-header .wrap{display:flex;align-items:center;gap:24px;height:58px}.logo{font-weight:700;font-size:17px;color:var(--text);white-space:nowrap}.logo:hover{text-decoration:none}.nav{display:flex;gap:18px;font-size:14px}.nav a{color:var(--muted)}.nav 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