:root{--bg: #f5f7fb;--bg-elev: #ffffff;--bg-subtle: #eef1f7;--text: #1c2333;--text-dim: #5b667a;--border: #dde3ee;--primary: #2f6bff;--primary-weak: #e7eeff;--success: #1a9e6a;--warning: #c98a12;--danger: #d94848;--shadow: 0 2px 12px rgba(24, 39, 75, .08);--radius: 10px}:root[data-theme=dark]{--bg: #10141c;--bg-elev: #171d29;--bg-subtle: #1f2634;--text: #e7ecf5;--text-dim: #9aa6bd;--border: #2a3346;--primary: #5a8bff;--primary-weak: #1c2740;--success: #3ecf95;--warning: #e2b13c;--danger: #f26d6d;--shadow: 0 2px 14px rgba(0, 0, 0, .4)}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;background:var(--bg);color:var(--text);font-size:14px;line-height:1.6}a{color:var(--primary);text-decoration:none}button{font:inherit;cursor:pointer;border:1px solid var(--border);background:var(--bg-elev);color:var(--text);border-radius:8px;padding:7px 14px;transition:all 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