:root{--ink:#20213b;--muted:#6b7088;--purple:#5b4cbb;--light:#f5f4fb;--border:#e8e7f0;--orange:#efaa68;--green:#2e8368;--red:#c8515d}*{box-sizing:border-box}body{margin:0;font:16px/1.55 "Segoe UI",Arial,"Microsoft YaHei",sans-serif;color:var(--ink);background:#fafafc}button,input,textarea,select{font:inherit}button{cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid #9789ed;outline-offset:2px}a{color:var(--purple)}.shell{display:flex;min-height:100vh}.sidebar{width:260px;flex:0 0 260px;background:#fff;border-right:1px solid var(--border);padding:28px 18px;display:flex;flex-direction:column;position:sticky;top:0;height:100vh}.brand{display:flex;gap:11px;align-items:center;padding:0 10px 38px}.brand-mark{display:grid;place-items:center;width:38px;height:38px;border-radius:13px;background:var(--purple);color:white;font-weight:800;font-size:22px;box-shadow:0 5px 12px #5b4cbb33}.brand strong,.brand 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