:root{--bg: #fafbfd;--slot: #dfe2e9;--surface: #ffffff;--surface-soft: #f3f4f7;--text: #1f2125;--muted: #6b7079;--muted-2: #94a3b8;--line: #e4e6eb;--line-soft: #ecedf0;--accent: #047857;--accent-strong: #035e44;--accent-soft: #e6f4ee;--pill: #f2f2f2;--avatar-bg: #2f2f2f;--fs-body: 14px;--lh-body: 1.85;--col-left: 268px;--col-right: 420px;--card-r: 16px}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;font-size:var(--fs-body);line-height:var(--lh-body);-webkit-font-smoothing:antialiased}button{font:inherit;color:inherit;cursor:pointer}.shell{display:flex;flex-direction:column;height:100%;background:var(--bg)}.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:54px;padding:8px 22px;flex:none;border-bottom:.5px solid 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