:root{--bg:#fff;--bg-soft:#fafafa;--surface:#fff;--surface-strong:#fff;--surface-subtle:#f5f5f5;--text:#0d0d0d;--text-soft:#404040;--text-faint:#737373;--line:#e5e5e5;--primary:#0d0d0d;--primary-strong:#0d0d0d;--primary-soft:#f5f5f5;--success:#059669;--danger:#dc2626;--panel-width:560px;--panel-wide:1080px;--panel-button-width:320px;--shadow-soft:0 1px 2px #0000000a;--shadow-card:0 1px 3px #0000000d;--shadow-button:0 1px 2px #00000014}*{box-sizing:border-box}html{min-height:100%}body{min-height:100vh;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;text-rendering:optimizelegibility;margin:0;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;overflow-x:hidden}#app{z-index:1;min-height:100vh;position:relative}a{color:inherit;font:inherit;text-decoration:none}a:focus-visible{outline:2px solid var(--primary);outline-offset:3px}code{background:#ffffffa8;border:1px solid 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