:root{--bg:#f6f3ee;--panel:#fffdf9;--text:#20252b;--muted:#66707b;--line:#ded8cf;--primary:#216869;--primary-dark:#174d4e;--accent:#c45f3c;--soft:#e7f0ed;--warn:#fff0dc;--danger:#b8472e;--shadow:0 18px 42px rgba(31,38,46,.12)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--text);background:linear-gradient(135deg,rgba(33,104,105,.12),transparent 38%),linear-gradient(315deg,rgba(196,95,60,.1),transparent 35%),var(--bg);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Microsoft YaHei,Arial,sans-serif;letter-spacing:0}button,input,select,textarea{font:inherit}button{cursor:pointer}a{color:inherit}.shell{min-height:100vh;display:grid;grid-template-columns:300px 1fr}.side{position:-webkit-sticky;position:sticky;top:0;height:100vh;padding:26px 22px;border-right:1px solid 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