:root {
    --primary: #2f80ed;
    --bg: #f7f9fc;
    --card: #fff;
    --text: #1f2933;
    --muted: #7b8794;
    --border: #e4e7eb;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: "Microsoft YaHei", system-ui, -apple-system, sans-serif; background: var(--bg); color: var(--text); }
.layout { display: grid; grid-template-columns: 240px 1fr; min-height: 100vh; }
.sider { background: #fff; color: #111; padding: 0; border-right: 1px solid var(--border); }
.logo { font-weight: 700; font-size: 18px; margin: 0; padding: 0 16px; display: flex; align-items: center; justify-content: center; gap: 8px; border-bottom: 1px solid var(--border); height: 52px; line-height: 1; }
.nav { list-style: none; margin: 0; padding: 12px 8px 16px; }
.nav li { margin-bottom: 8px; }
.nav a { display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-radius: 8px; color: #111; text-decoration: none; }
.nav-icon { width: 16px; text-align: center; color: var(--muted); }
.nav a.active { background: var(--primary); color: #fff; }
.nav a.active .nav-icon { color: #fff; }
.nav a.active:hover { background: var(--primary); color: #fff; }
.nav a.active:hover .nav-icon { color: #fff; }
.nav a:hover { background: rgba(47,128,237,0.1); color: #111; }
.content-area { display: flex; flex-direction: column; min-height: 100vh; }
.topbar { background: #fff; border-bottom: 1px solid var(--border); border-top: 1px solid var(--border); padding: 0 16px; display: flex; align-items: center; justify-content: space-between; height: 52px; }
.topbar-title { font-size: 18px; font-weight: 400; }
.topbar-user { display: flex; align-items: center; gap: 10px; }
.avatar { width: 32px; height: 32px; border-radius: 50%; background: #e0e7ff; color: #2f54eb; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 12px; }
.username { color: #111; font-size: 14px; }
.btn-logout { border: 1px solid var(--border); background: #fff; padding: 6px 10px; border-radius: 6px; cursor: pointer; color: #111; }
.btn-logout:hover { background: rgba(47,128,237,0.08); }
.main { padding: 20px 24px; }
.header { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 16px 20px; display: flex; justify-content: space-between; align-items: center; box-shadow: 0 4px 12px rgba(0,0,0,0.04); }
.header .title { font-size: 18px; font-weight: 700; }
.filters { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 12px; }
.select { background: var(--card); border: 1px solid var(--border); border-radius: 8px; padding: 10px 12px; font-size: 14px; color: var(--muted); }
.content { margin-top: 16px; display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 16px 16px 12px; box-shadow: 0 4px 12px rgba(0,0,0,0.04); }
.card h3 { margin-bottom: 12px; font-size: 16px; }
.bar-chart { display: grid; grid-template-columns: auto 1fr; row-gap: 10px; align-items: center; }
.bar-label { color: var(--muted); font-size: 13px; }
.bar-track { background: #eef2f7; border-radius: 999px; height: 10px; position: relative; }
.bar-fill { height: 100%; border-radius: 999px; background: linear-gradient(90deg, #2f80ed, #9966ff); }
.table-card { margin-top: 16px; }
table { width: 100%; border-collapse: collapse; margin-top: 8px; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--border); font-size: 13px; }
th { color: var(--muted); font-weight: 600; }
td { color: var(--text); }
.action { color: var(--primary); cursor: pointer; text-decoration: none; }
@media (max-width: 1080px) {
    .layout { grid-template-columns: 1fr; }
    .sider { display: none; }
    .content { grid-template-columns: 1fr; }
    .filters { grid-template-columns: 1fr; }
}