*{box-sizing:border-box}body{margin:0;font-family:-apple-system,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;color:#1f2329;background:#f5f6f7}h2,h3,h4{margin:12px 0 8px}button{min-height:36px;padding:6px 14px;border:1px solid #d0d4d9;border-radius:6px;background:#fff;cursor:pointer}button:disabled{opacity:.45;cursor:not-allowed}button:not(:disabled):hover{border-color:#3370ff;color:#3370ff}input,select{min-height:34px;padding:4px 8px;border:1px solid #d0d4d9;border-radius:6px;margin:2px 4px 2px 0}ul{padding-left:20px}pre{background:#fff;border:1px solid #e4e6eb;border-radius:6px;padding:8px;overflow:auto;font-size:12px}.err{color:#d8393c}.card{background:#fff;border:1px solid #e4e6eb;border-radius:8px;padding:12px 16px;margin:12px 0}.row{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:8px 0}@media (min-width: 1024px){.card{padding:16px 24px}}:root{--safe-b: env(safe-area-inset-bottom)}.shell{min-height:100vh;display:flex;flex-direction:column}.topbar{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;border-bottom:1px solid #eee}.content{flex:1;padding:16px;padding-bottom:calc(16px + var(--safe-b))}@media (min-width: 1024px){.content{max-width:1200px;margin:0 auto;width:100%}.grid{display:grid;grid-template-columns:240px 1fr;gap:24px}}button{min-height:44px;min-width:44px}.subnav{margin:12px 0}.err{color:#c00}