:root{--bg: #eef2f5;--surface: #ffffff;--surface-soft: #f7f9fb;--line: #d9e1e8;--text: #1f2933;--muted: #637083;--accent: #256f8f;--accent-strong: #15516d;--accent-soft: #d9edf4;--ok: #2f6c55;--warn: #9a641b;--danger: #a93f32;--shadow: 0 18px 38px rgba(31, 41, 51, .1);font-family:Noto Sans SC,sans-serif;color:var(--text);background:var(--bg)}*{box-sizing:border-box}body{margin:0;min-height:100vh;overflow:hidden}button,input,select{font:inherit}button{border:none}.app-shell{display:grid;grid-template-rows:56px 1fr;height:100vh}.topbar{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:14px 22px;border-bottom:1px solid var(--line);background:rgba(255,255,255,.94);box-shadow:0 6px 20px #1f29330f;z-index:2}.topbar 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