:root{font-family:Segoe UI,PingFang SC,Microsoft YaHei,system-ui,sans-serif;color:#303133;--sidebar: #1e222d;--sidebar-2: #171b24;--accent: #409eff;--accent-dark: #337ecc;--danger: #f56c6c;--bg: #f0f2f5;--card: #ffffff}*{box-sizing:border-box}body{margin:0;background:var(--bg)}.muted{color:#909399}.err{color:#f56c6c;margin-top:8px}.login-page{min-height:100vh;display:grid;place-items:center;background:linear-gradient(160deg,#1e222d,#2b3345)}.login-card{width:360px;background:#fff;border-radius:14px;padding:28px 24px;display:grid;gap:8px;box-shadow:0 12px 40px #00000040}.login-logo{width:64px;height:64px;margin:0 auto 4px;object-fit:contain}.login-card h1{margin:0;text-align:center;font-size:1.25rem}.login-card label{font-size:13px;color:#606266;margin-top:6px}.login-card input{padding:10px 12px;border:1px solid #dcdfe6;border-radius:8px}.admin-shell{display:flex;min-height:100vh}.sidebar{width:220px;background:var(--sidebar);color:#fff;display:flex;flex-direction:column;flex-shrink:0}.brand{display:flex;align-items:center;gap:10px;padding:18px 16px;font-weight:700;font-size:18px;letter-spacing:.5px;border-bottom:1px solid rgba(255,255,255,.06)}.brand img{width:36px;height:36px;object-fit:contain;background:#fff;border-radius:50%;padding:2px}.menu{flex:1;padding:12px 10px;display:flex;flex-direction:column;gap:4px}.menu-item{display:flex;align-items:center;gap:10px;width:100%;border:0;background:transparent;color:#ffffffd9;text-align:left;padding:11px 14px;border-radius:8px;cursor:pointer;font-size:14px}.menu-item:hover{background:#ffffff0f}.menu-item.active{background:var(--accent);color:#fff;font-weight:600}.ico{width:18px;text-align:center;opacity:.95}.logout{margin:12px;border:0;background:transparent;color:var(--danger);display:flex;align-items:center;gap:8px;padding:10px 12px;cursor:pointer;font-size:14px}.main{flex:1;display:flex;flex-direction:column;min-width:0}.topbar{height:56px;background:#fff;border-bottom:1px solid #ebeef5;display:flex;align-items:center;padding:0 20px}.topbar h2{margin:0;font-size:16px;font-weight:600}.content{padding:16px 20px 28px}.btn-primary{background:var(--accent);color:#fff;border:0;border-radius:6px;padding:8px 14px;cursor:pointer}.btn-primary:hover{background:var(--accent-dark)}.btn-ghost{background:#fff;border:1px solid #dcdfe6;border-radius:6px;padding:7px 12px;cursor:pointer;color:#606266}.btn-refresh{width:32px;height:32px;border-radius:50%;border:0;background:var(--accent);color:#fff;cursor:pointer}.sm{padding:4px 10px;font-size:12px;border:0;border-radius:4px;background:var(--accent);color:#fff;cursor:pointer}.metric-banner{background:var(--accent);border-radius:8px;padding:18px 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8px;border-radius:10px;font-size:12px}.tag.ok{background:#f0f9eb;color:#67c23a}.tag.off{background:#fef0f0;color:#f56c6c}.empty{text-align:center;color:#909399;padding:28px!important}.placeholder.card{background:#fff;border-radius:8px;padding:28px;box-shadow:0 1px 3px #0000000a}@media(max-width:1100px){.metric-banner{grid-template-columns:repeat(3,1fr)}.stat-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:800px){.admin-shell{flex-direction:column}.sidebar{width:100%}.metric-banner{grid-template-columns:repeat(2,1fr)}}