/* ===================== 管理员后台 - PC SaaS 风格 ===================== */
:root {
  --a-bg: #f5f7fa;
  --a-card: #ffffff;
  --a-line: #ebeef5;
  --a-text-1: #303133;
  --a-text-2: #606266;
  --a-text-3: #909399;
  --a-text-4: #c0c4cc;
  --a-primary: #409eff;
  --a-primary-dark: #337ecc;
  --a-success: #67c23a;
  --a-warning: #e6a23c;
  --a-danger: #f56c6c;
  --a-info: #909399;
  --a-sidebar-bg: #1f2d3d;
  --a-sidebar-text: #bfcbd9;
  --a-sidebar-hover: #2d3e50;
  --a-sidebar-active: #409eff;
  --a-radius: 4px;
  --a-shadow: 0 2px 4px rgba(0, 0, 0, 0.04);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; }
body {
  font-family: "Helvetica Neue", "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--a-bg);
  color: var(--a-text-1);
  font-size: 14px;
  min-height: 100vh;
}

/* ===================== 登录页 ===================== */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1f2d3d 0%, #409eff 100%);
}
.login-box {
  width: 380px;
  background: #fff;
  border-radius: 8px;
  padding: 40px 32px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.2);
}
.login-box h1 {
  margin: 0 0 8px;
  font-size: 22px;
  text-align: center;
  color: var(--a-text-1);
}
.login-box .sub {
  text-align: center;
  color: var(--a-text-3);
  font-size: 13px;
  margin-bottom: 30px;
}

/* ===================== 主布局 ===================== */
.app-layout {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

.sidebar {
  width: 220px;
  background: var(--a-sidebar-bg);
  color: var(--a-sidebar-text);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}
.sidebar .brand {
  padding: 20px 20px 16px;
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  gap: 8px;
}
.sidebar .brand .icon { font-size: 20px; }
.sidebar .menu { flex: 1; overflow-y: auto; padding: 8px 0; }
.sidebar .menu-item {
  padding: 11px 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  transition: all .2s;
  user-select: none;
  border-left: 3px solid transparent;
}
.sidebar .menu-item:hover { background: var(--a-sidebar-hover); color: #fff; }
.sidebar .menu-item.active {
  background: var(--a-sidebar-hover);
  color: #fff;
  border-left-color: var(--a-sidebar-active);
}
.sidebar .menu-item .icon { width: 18px; text-align: center; font-size: 15px; }

.sidebar .footer {
  padding: 12px 20px;
  border-top: 1px solid rgba(255,255,255,0.08);
  font-size: 12px;
  color: var(--a-text-4);
}

/* ===================== 主区域 ===================== */
.main-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.topbar {
  height: 56px;
  background: #fff;
  border-bottom: 1px solid var(--a-line);
  display: flex;
  align-items: center;
  padding: 0 24px;
  justify-content: space-between;
  flex-shrink: 0;
}
.topbar .breadcrumb { font-size: 14px; color: var(--a-text-2); }
.topbar .breadcrumb .sep { color: var(--a-text-4); margin: 0 8px; }
.topbar .topbar-right { display: flex; align-items: center; gap: 16px; }
.topbar .user-tag {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  color: var(--a-text-2);
  font-size: 13px;
}
.topbar .user-tag .avatar {
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--a-primary);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 600;
}

.content {
  flex: 1;
  overflow-y: auto;
  padding: 20px 24px;
}

/* ===================== 卡片 ===================== */
.panel {
  background: var(--a-card);
  border-radius: var(--a-radius);
  box-shadow: var(--a-shadow);
  padding: 20px;
  margin-bottom: 16px;
}
.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--a-line);
}
.panel-head h2 { margin: 0; font-size: 16px; font-weight: 600; }

/* ===================== 统计卡 ===================== */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 16px;
}
.stat-card {
  background: var(--a-card);
  border-radius: var(--a-radius);
  padding: 18px 20px;
  box-shadow: var(--a-shadow);
  border-left: 4px solid var(--a-primary);
}
.stat-card.success { border-left-color: var(--a-success); }
.stat-card.warning { border-left-color: var(--a-warning); }
.stat-card.danger  { border-left-color: var(--a-danger); }
.stat-card.info    { border-left-color: var(--a-info); }

.stat-card .label {
  font-size: 12px;
  color: var(--a-text-3);
}
.stat-card .value {
  font-size: 26px;
  font-weight: 600;
  color: var(--a-text-1);
  margin: 6px 0 4px;
}
.stat-card .sub {
  font-size: 11px;
  color: var(--a-text-4);
}

/* ===================== 按钮 ===================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 8px 16px;
  border-radius: var(--a-radius);
  font-size: 13px;
  border: 1px solid var(--a-line);
  background: #fff;
  color: var(--a-text-1);
  cursor: pointer;
  transition: all .15s;
  user-select: none;
}
.btn:hover { border-color: var(--a-primary); color: var(--a-primary); }
.btn.primary { background: var(--a-primary); border-color: var(--a-primary); color: #fff; }
.btn.primary:hover { background: var(--a-primary-dark); border-color: var(--a-primary-dark); color: #fff; }
.btn.danger  { color: var(--a-danger); border-color: var(--a-danger); }
.btn.danger:hover { background: var(--a-danger); color: #fff; }
.btn.success { background: var(--a-success); border-color: var(--a-success); color: #fff; }
.btn.success:hover { background: #4ea82a; }
.btn.sm { padding: 4px 10px; font-size: 12px; }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; }
.btn.link { border: none; background: none; color: var(--a-primary); padding: 2px 4px; }
.btn.link:hover { text-decoration: underline; }

/* ===================== 表格 ===================== */
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.table th, .table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--a-line);
  text-align: left;
}
.table th {
  background: #fafafa;
  font-weight: 600;
  color: var(--a-text-2);
  font-size: 12px;
}
.table tbody tr:hover { background: #fafafa; }
.table .actions { display: flex; gap: 4px; flex-wrap: wrap; }
.table .num { font-family: Menlo, monospace; font-size: 12px; color: var(--a-text-3); }

/* ===================== Tag ===================== */
.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 500;
  line-height: 1.4;
}
.tag-primary { background: rgba(64,158,255,0.12); color: var(--a-primary); }
.tag-success { background: rgba(103,194,58,0.12); color: var(--a-success); }
.tag-warning { background: rgba(230,162,60,0.12); color: var(--a-warning); }
.tag-danger  { background: rgba(245,108,108,0.12); color: var(--a-danger); }
.tag-info    { background: rgba(144,147,153,0.12); color: var(--a-info); }

/* ===================== 表单 ===================== */
.form-row { margin-bottom: 16px; }
.form-row label { display: block; margin-bottom: 6px; font-size: 13px; color: var(--a-text-2); }
.form-row input, .form-row textarea, .form-row select {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--a-line);
  border-radius: var(--a-radius);
  font-size: 13px;
  color: var(--a-text-1);
  outline: none;
  transition: border-color .15s;
  background: #fff;
}
.form-row input:focus, .form-row textarea:focus, .form-row select:focus {
  border-color: var(--a-primary);
}
.form-row.inline { display: flex; align-items: center; gap: 8px; }
.form-row.inline label { margin: 0; min-width: 80px; }

.search-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  align-items: center;
}
.search-bar input, .search-bar select {
  padding: 7px 12px;
  border: 1px solid var(--a-line);
  border-radius: var(--a-radius);
  font-size: 13px;
  outline: none;
  background: #fff;
}
.search-bar input { min-width: 200px; }

/* ===================== 模态框 ===================== */
.modal-mask {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  animation: fadein .2s;
}
@keyframes fadein { from { opacity: 0; } to { opacity: 1; } }
.modal-box {
  background: #fff;
  border-radius: 6px;
  min-width: 400px;
  max-width: 90vw;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 12px 40px rgba(0,0,0,0.2);
}
.modal-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 20px;
  border-bottom: 1px solid var(--a-line);
}
.modal-head h3 { margin: 0; font-size: 16px; }
.modal-head .close {
  background: none; border: none; font-size: 20px;
  cursor: pointer; color: var(--a-text-3);
}
.modal-body { padding: 20px; }
.modal-foot {
  padding: 12px 20px;
  border-top: 1px solid var(--a-line);
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

/* ===================== Toast ===================== */
.toast {
  position: fixed;
  top: 70px;
  left: 50%;
  transform: translateX(-50%);
  background: #fff;
  padding: 12px 20px;
  border-radius: 4px;
  box-shadow: 0 6px 24px rgba(0,0,0,0.15);
  z-index: 2000;
  font-size: 14px;
  animation: toast-in .25s;
  border-left: 4px solid var(--a-success);
}
.toast.error { border-left-color: var(--a-danger); }
.toast.warning { border-left-color: var(--a-warning); }
@keyframes toast-in {
  from { opacity: 0; transform: translate(-50%, -20px); }
  to { opacity: 1; transform: translate(-50%, 0); }
}

/* ===================== 空状态 ===================== */
.empty-block {
  padding: 60px 20px;
  text-align: center;
  color: var(--a-text-4);
}
.empty-block .icon { font-size: 40px; margin-bottom: 8px; opacity: 0.6; }

/* ===================== 图表容器 ===================== */
.chart {
  background: var(--a-card);
  padding: 20px;
  border-radius: var(--a-radius);
  box-shadow: var(--a-shadow);
}
.chart-bars {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  height: 200px;
  padding: 12px 0;
  border-bottom: 1px solid var(--a-line);
}
.chart-bar {
  flex: 1;
  background: linear-gradient(to top, var(--a-primary), #6cb2ff);
  border-radius: 2px 2px 0 0;
  position: relative;
  min-height: 2px;
  transition: all .2s;
  cursor: pointer;
}
.chart-bar:hover { background: var(--a-primary-dark); }
.chart-bar .tip {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: #1f2d3d;
  color: #fff;
  padding: 4px 8px;
  border-radius: 3px;
  font-size: 11px;
  white-space: nowrap;
  display: none;
  margin-bottom: 4px;
  z-index: 10;
}
.chart-bar:hover .tip { display: block; }
.chart-legend {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--a-text-3);
  margin-top: 6px;
}