:root{--bg: #0f1115;--panel: #181b22;--panel-2: #1f232c;--border: #2a2f3a;--text: #e6e8ec;--muted: #9aa3b2;--accent: #4f8cff;--accent-2: #34d399;--danger: #f87171;--code-bg: #0b0d11;--topbar-bg: rgba(15, 17, 21, .85);--radius: 12px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;color-scheme:dark}:root[data-theme=light]{--bg: #f4f6fa;--panel: #ffffff;--panel-2: #eef1f6;--border: #dde2ea;--text: #1a1f28;--muted: #667085;--accent: #2f6fed;--accent-2: #0ea672;--danger: #dc2626;--code-bg: #f0f2f6;--topbar-bg: rgba(244, 246, 250, .85);color-scheme:light}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}.app{max-width:900px;margin:0 auto;padding:0 16px 64px}.topbar{position:sticky;top:0;z-index:10;display:flex;align-items:center;gap:16px;padding:14px 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