:root{--bg: #f4f5fa;--card: #ffffff;--line: #e6e8ef;--text: #20242c;--muted: #7a8194;--accent: #4f46e5;--accent-light: #eef0fe;--accent-grad: linear-gradient(135deg, #4f46e5, #7c3aed);--danger: #dc2626;--success: #16a34a;--radius: 12px;--shadow: 0 1px 3px rgba(24, 28, 40, .06), 0 4px 14px rgba(24, 28, 40, .05)}*{box-sizing:border-box;margin:0;padding:0}html,body,#app{height:100%}body{font-family:PingFang SC,Hiragino Sans GB,Microsoft YaHei,Segoe UI,system-ui,sans-serif;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased}#app{display:flex;flex-direction:column}.app-shell{height:100%;display:flex;flex-direction:column}.app-header{height:56px;flex:none;display:flex;align-items:center;gap:28px;padding:0 24px;background:var(--card);border-bottom:1px solid 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