:root{--ink:#17232e;--muted:#64717b;--line:#dbe5e9;--paper:#f7fafb;--panel:#ffffff;--wash:#ebf6fa;--green:#087bab;--green-dark:#075b85;--red:#c84545;--yellow:#d9a72f;--blue:#129bd1;--shadow:0 18px 45px rgba(23,33,27,.08)}*{box-sizing:border-box}.app-only{display:none}body{margin:0;background:var(--paper);color:var(--ink);font-family:Microsoft YaHei,PingFang SC,Segoe UI,Arial,sans-serif;letter-spacing:0}button,input,select,textarea{font:inherit}button{cursor:pointer}a{color:inherit;text-decoration:none}p{line-height:1.7}.shell{display:grid;grid-template-columns:248px minmax(0,1fr);min-height:100vh}.sidebar{position:-webkit-sticky;position:sticky;top:0;height:100vh;padding:24px 18px;background:#173548;color:#eef8fc;display:flex;flex-direction:column;gap:24px}.brand{display:grid;grid-gap:8px;gap:8px}.brand-mark{width:100%;height:58px;overflow:hidden;display:grid;place-items:center;border-radius:4px}.brand-mark img{width:100%;height:100%;object-fit:contain;object-position:left 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