/* 运营端样式 - 移动端优先 */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

:root {
  --primary: #1f6feb;
  --primary-dark: #1858c4;
  --bg: #f5f6fa;
  --card: #ffffff;
  --text: #1a1a1a;
  --text-sub: #6b7280;
  --border: #e5e7eb;
  --danger: #dc2626;
  --warn: #f59e0b;
  --success: #10b981;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.page {
  display: none;
  min-height: 100vh;
}
.page.active {
  display: block;
}

/* 登录页 */
.login-card {
  max-width: 420px;
  margin: 60px auto;
  padding: 32px 24px;
  background: var(--card);
  border-radius: 12px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
}

.brand {
  text-align: center;
  margin-bottom: 32px;
}

.brand-logo {
  display: inline-block;
  width: 60px;
  height: 60px;
  line-height: 60px;
  background: var(--primary);
  color: white;
  border-radius: 14px;
  font-weight: 700;
  font-size: 22px;
  margin-bottom: 12px;
}

.brand h1 {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 6px;
}

.subtitle {
  color: var(--text-sub);
  font-size: 13px;
}

.form-row {
  margin-bottom: 16px;
}

.form-row label {
  display: block;
  margin-bottom: 6px;
  font-size: 13px;
  color: var(--text-sub);
}

.form-row input,
.form-row select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 15px;
  outline: none;
  background: white;
  transition: border 0.15s;
}

.form-row input:focus,
.form-row select:focus {
  border-color: var(--primary);
}

.btn {
  padding: 12px 20px;
  border: none;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
}

.btn-primary {
  background: var(--primary);
  color: white;
}

.btn-primary:active {
  background: var(--primary-dark);
}

.btn-block {
  width: 100%;
}

.error {
  color: var(--danger);
  font-size: 13px;
  min-height: 20px;
  text-align: center;
  margin-top: 8px;
}

/* 顶部栏 */
.topbar {
  background: white;
  padding: 14px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.topbar-title {
  font-weight: 600;
  font-size: 16px;
}

.topbar-user {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--text-sub);
}

.link-btn {
  background: none;
  border: none;
  color: var(--primary);
  font-size: 13px;
  cursor: pointer;
  padding: 0;
}

/* Tab 栏 */
.tabbar {
  display: flex;
  background: white;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 49px;
  z-index: 10;
}

.tab {
  flex: 1;
  padding: 12px;
  background: none;
  border: none;
  font-size: 14px;
  color: var(--text-sub);
  cursor: pointer;
  position: relative;
}

.tab.active {
  color: var(--primary);
  font-weight: 500;
}

.tab.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 3px;
  background: var(--primary);
  border-radius: 2px;
}

/* Tab 面板 */
.tab-panel {
  display: none;
  padding: 16px;
}

.tab-panel.active {
  display: block;
}

/* KPI 卡片 */
.cards-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-bottom: 20px;
}

.card-mini {
  background: var(--card);
  padding: 14px 8px;
  border-radius: 8px;
  text-align: center;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.card-mini.alert .card-num {
  color: var(--danger);
}

.card-num {
  font-size: 22px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
}

.card-label {
  font-size: 12px;
  color: var(--text-sub);
}

/* 区块标题 */
.section-title {
  display: flex;
  align-items: center;
  font-size: 15px;
  font-weight: 600;
  margin: 16px 0 12px;
}

.back-btn {
  background: none;
  border: none;
  color: var(--primary);
  cursor: pointer;
  font-size: 14px;
  margin-right: 8px;
  padding: 0;
}

/* 列表 */
.list {
  background: var(--card);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.empty {
  padding: 32px 16px;
  text-align: center;
  color: var(--text-sub);
  font-size: 13px;
}

.list-item {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
}

.list-item:last-child {
  border-bottom: none;
}

.list-item:active {
  background: #f9fafb;
}

.item-main {
  flex: 1;
  min-width: 0;
}

.item-title {
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.item-meta {
  font-size: 12px;
  color: var(--text-sub);
}

.item-extra {
  text-align: right;
  font-size: 13px;
}

.item-num {
  font-size: 16px;
  font-weight: 600;
}

.item-num.danger {
  color: var(--danger);
}

.item-num.warn {
  color: var(--warn);
}

.item-num.success {
  color: var(--success);
}

/* 筛选 */
.filter-row {
  margin-bottom: 12px;
}

.filter-row select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: white;
  font-size: 14px;
}

/* 信息卡片 */
.info-card {
  background: var(--card);
  border-radius: 8px;
  padding: 14px 16px;
  margin-bottom: 16px;
}

.info-row {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}

.info-row:last-child {
  border-bottom: none;
}

.info-key {
  color: var(--text-sub);
  font-size: 13px;
}

.info-val {
  font-size: 14px;
  font-weight: 500;
}

/* 图表 */
.chart-wrap {
  background: var(--card);
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 16px;
}

#trend-chart {
  width: 100%;
  height: 180px;
}

/* Footer */
.footer {
  text-align: center;
  padding: 24px 16px;
  color: var(--text-sub);
  font-size: 12px;
}

/* 预警项 */
.alert-item {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(to right, #fff7f7, white);
}

.alert-time {
  font-size: 12px;
  color: var(--text-sub);
  margin-bottom: 4px;
}

.alert-content {
  font-size: 13px;
  line-height: 1.6;
}

.alert-tag {
  display: inline-block;
  padding: 2px 8px;
  background: var(--danger);
  color: white;
  font-size: 11px;
  border-radius: 4px;
  margin-right: 6px;
}

.alert-tag.success {
  background: var(--success);
}

.alert-tag.failed {
  background: #6b7280;
}

/* 响应式 */
@media (min-width: 768px) {
  .login-card {
    margin-top: 120px;
  }
  body {
    max-width: 600px;
    margin: 0 auto;
    background: #f0f1f5;
  }
  .topbar, .tabbar {
    border-radius: 0;
  }
}