:root{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;color:#253345;background:#f5f7fa;font-size:15px;line-height:1.6;--brand:#2457d6;--line:#e2e7ee;--muted:#607086}*{box-sizing:border-box}body{margin:0}header{min-height:72px;padding:16px 32px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:16px}header>div,.actions,.output-head{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.brand{color:#18283c;text-decoration:none;font-weight:650;font-size:20px}.brand span{font-size:13px;font-weight:400;border-left:1px solid var(--line);padding-left:16px;margin-left:16px;color:var(--muted)}button,input,select,textarea{font:inherit}button{border:1px solid #d3dce7;border-radius:6px;background:white;color:#334155;padding:8px 16px;cursor:pointer;min-height:40px}button:hover{border-color:#8ea6c7;background:#f6f8fc}button:disabled{opacity:.55;cursor:wait}.primary{background:var(--brand);color:#fff;border-color:var(--brand)}.primary:hover{background:#1c46b5;color:#fff}a{color:var(--brand)}.shell{display:grid;grid-template-columns:224px minmax(0,1fr);min-height:calc(100vh - 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