*{box-sizing:border-box;margin:0;padding:0}:root{--bg: #f4f6fa;--card: #ffffff;--border: #e6e9f0;--text: #1f2430;--muted: #7a8194;--up: #d93026;--down: #188038;--accent: #2f6df6}body{font-family:-apple-system,PingFang SC,Microsoft YaHei,Segoe UI,sans-serif;background:var(--bg);color:var(--text);font-size:14px}.app{display:flex;min-height:100vh}.sidebar{width:216px;background:#fff;border-right:1px solid var(--border);padding:20px 12px;position:sticky;top:0;height:100vh;flex-shrink:0}.logo{font-size:16px;font-weight:700;padding:4px 12px 18px}.logo span{color:var(--accent)}.nav-item{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:8px;color:var(--muted);cursor:pointer;margin-bottom:4px;font-weight:500;-webkit-user-select:none;user-select:none}.nav-item:hover{background:#f2f5fb}.nav-item.active{background:#eaf1fe;color:var(--accent)}.nav-icon{font-size:16px}.main{flex:1;padding:24px 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