/* ===== 重置 & 变量 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --primary: #4f46e5;
  --primary-dark: #3730a3;
  --primary-light: #e0e7ff;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #3b82f6;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --sidebar-w: 240px;
  --sidebar-collapsed: 60px;
  --topbar-h: 56px;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
  --shadow-lg: 0 10px 15px rgba(0,0,0,.1), 0 4px 6px rgba(0,0,0,.05);
}
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif; font-size: 14px; color: var(--gray-800); background: var(--gray-100); }
a { color: var(--primary); text-decoration: none; }
input, select, textarea, button { font-family: inherit; font-size: 14px; }
.hidden { display: none !important; }

/* ===== 登录页 ===== */
.login-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); }
.login-box { background: #fff; border-radius: 16px; padding: 40px; width: 380px; box-shadow: var(--shadow-lg); }
.login-logo { text-align: center; margin-bottom: 32px; }
.logo-icon { width: 56px; height: 56px; background: var(--primary); color: #fff; border-radius: 14px; font-size: 28px; font-weight: 700; display: inline-flex; align-items: center; justify-content: center; margin-bottom: 12px; }
.login-logo h1 { font-size: 20px; color: var(--gray-800); font-weight: 600; }
.login-error { color: var(--danger); font-size: 13px; margin-top: 8px; text-align: center; min-height: 20px; }

/* ===== 表单 ===== */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 500; color: var(--gray-700); margin-bottom: 6px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 9px 12px; border: 1px solid var(--gray-300); border-radius: var(--radius);
  outline: none; transition: border-color .2s, box-shadow .2s; background: #fff;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-light);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; }

/* ===== 按钮 ===== */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px; border-radius: var(--radius); border: none; cursor: pointer; font-weight: 500; transition: all .2s; white-space: nowrap; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #059669; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #dc2626; }
.btn-warning { background: var(--warning); color: #fff; }
.btn-warning:hover { background: #d97706; }
.btn-outline { background: #fff; color: var(--gray-700); border: 1px solid var(--gray-300); }
.btn-outline:hover { background: var(--gray-50); border-color: var(--gray-400); }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-block { width: 100%; justify-content: center; padding: 11px; }
.btn-icon { padding: 6px; border-radius: 6px; }

/* ===== 主布局 ===== */
.main-layout { display: flex; min-height: 100vh; }

/* ===== 侧边栏 ===== */
.sidebar { width: var(--sidebar-w); background: var(--gray-900); color: #fff; display: flex; flex-direction: column; transition: width .25s; flex-shrink: 0; position: fixed; top: 0; left: 0; height: 100vh; z-index: 100; overflow-y: auto; overflow-x: hidden; }
.sidebar.collapsed { width: var(--sidebar-collapsed); }
.sidebar-header { display: flex; align-items: center; gap: 10px; padding: 16px 14px; border-bottom: 1px solid rgba(255,255,255,.08); min-height: var(--topbar-h); }
.sidebar-header .logo-icon { width: 32px; height: 32px; font-size: 16px; border-radius: 8px; flex-shrink: 0; }
.logo-text { font-size: 16px; font-weight: 600; white-space: nowrap; overflow: hidden; }
.sidebar-toggle { margin-left: auto; background: none; border: none; color: var(--gray-400); cursor: pointer; font-size: 18px; padding: 4px; border-radius: 4px; flex-shrink: 0; }
.sidebar-toggle:hover { color: #fff; background: rgba(255,255,255,.1); }
.sidebar.collapsed .logo-text, .sidebar.collapsed .nav-label, .sidebar.collapsed .nav-arrow, .sidebar.collapsed .nav-group-title .nav-label { display: none; }
.sidebar.collapsed .nav-group-title { justify-content: center; }
.sidebar.collapsed .nav-item { justify-content: center; }
.sidebar.collapsed .nav-children { display: none; }

/* 导航 */
.sidebar-nav { padding: 8px 0; flex: 1; }
.nav-item { display: flex; align-items: center; gap: 10px; padding: 10px 16px; cursor: pointer; border-radius: 0; transition: background .15s; color: var(--gray-300); }
.nav-item:hover { background: rgba(255,255,255,.07); color: #fff; }
.nav-item.active { background: var(--primary); color: #fff; }
.nav-icon { font-size: 16px; flex-shrink: 0; width: 20px; text-align: center; }
.nav-group-title { display: flex; align-items: center; gap: 10px; padding: 10px 16px; cursor: pointer; color: var(--gray-400); font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: .05em; transition: color .15s; }
.nav-group-title:hover { color: var(--gray-200); }
.nav-arrow { margin-left: auto; font-size: 10px; transition: transform .2s; }
.nav-group.open .nav-arrow { transform: rotate(180deg); }
.nav-children { display: none; }
.nav-group.open .nav-children { display: block; }
.nav-children .nav-item { padding-left: 44px; font-size: 13px; }

/* ===== 内容区 ===== */
.content-wrapper { margin-left: var(--sidebar-w); flex: 1; display: flex; flex-direction: column; transition: margin-left .25s; min-width: 0; }
.sidebar.collapsed ~ .content-wrapper { margin-left: var(--sidebar-collapsed); }
.topbar { height: var(--topbar-h); background: #fff; border-bottom: 1px solid var(--gray-200); display: flex; align-items: center; justify-content: space-between; padding: 0 24px; position: sticky; top: 0; z-index: 50; box-shadow: var(--shadow); }
.page-title { font-size: 16px; font-weight: 600; color: var(--gray-800); }
.topbar-right { display: flex; align-items: center; gap: 12px; }
.welcome-text { color: var(--gray-600); font-size: 13px; }
.content-area { padding: 24px; flex: 1; }

/* ===== 卡片 ===== */
.card { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px; }
.card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.card-title { font-size: 15px; font-weight: 600; color: var(--gray-800); }

/* ===== 仪表板 ===== */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card { background: #fff; border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); display: flex; align-items: center; gap: 16px; }
.stat-icon { width: 48px; height: 48px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 22px; flex-shrink: 0; }
.stat-icon.blue { background: #dbeafe; color: var(--info); }
.stat-icon.green { background: #d1fae5; color: var(--success); }
.stat-icon.purple { background: var(--primary-light); color: var(--primary); }
.stat-icon.orange { background: #fef3c7; color: var(--warning); }
.stat-icon.red { background: #fee2e2; color: var(--danger); }
.stat-info { flex: 1; min-width: 0; }
.stat-value { font-size: 24px; font-weight: 700; color: var(--gray-900); line-height: 1.2; }
.stat-label { font-size: 12px; color: var(--gray-500); margin-top: 2px; }
.charts-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 16px; margin-bottom: 24px; }
.charts-grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }
.chart-container { position: relative; height: 260px; }

/* ===== 工具栏 ===== */
.toolbar { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; flex-wrap: wrap; }
.toolbar-left { display: flex; align-items: center; gap: 10px; flex: 1; flex-wrap: wrap; }
.toolbar-right { display: flex; align-items: center; gap: 10px; }
.search-input { padding: 8px 12px; border: 1px solid var(--gray-300); border-radius: var(--radius); outline: none; width: 220px; }
.search-input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-light); }
.filter-select { padding: 8px 10px; border: 1px solid var(--gray-300); border-radius: var(--radius); outline: none; background: #fff; }
.filter-select:focus { border-color: var(--primary); }

/* ===== 表格 ===== */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
thead th { background: var(--gray-50); padding: 10px 12px; text-align: left; font-size: 12px; font-weight: 600; color: var(--gray-600); text-transform: uppercase; letter-spacing: .04em; border-bottom: 1px solid var(--gray-200); white-space: nowrap; }
tbody td { padding: 12px; border-bottom: 1px solid var(--gray-100); color: var(--gray-700); vertical-align: middle; }
tbody tr:hover { background: var(--gray-50); }
tbody tr:last-child td { border-bottom: none; }
.td-actions { display: flex; gap: 6px; flex-wrap: wrap; }

/* ===== 操作列三点下拉菜单 ===== */
.action-menu { position: relative; display: inline-block; }
.action-menu-trigger {
  width: 28px; height: 28px; padding: 0; border: 1px solid var(--gray-200);
  border-radius: 6px; background: #fff; cursor: pointer; color: var(--gray-600);
  font-size: 16px; line-height: 1; display: inline-flex; align-items: center; justify-content: center;
  transition: all .15s;
}
.action-menu-trigger:hover { background: var(--gray-50); color: var(--gray-800); border-color: var(--gray-300); }
.action-menu.open .action-menu-trigger { background: var(--gray-100); color: var(--gray-800); }
.action-menu-dropdown {
  display: none; position: fixed;
  min-width: 140px; background: #fff; border: 1px solid var(--gray-200); border-radius: 8px;
  box-shadow: 0 6px 20px rgba(0,0,0,.08); padding: 6px; z-index: 1000;
}
.action-menu.open .action-menu-dropdown { display: block; }
.action-menu-dropdown .btn { width: 100%; justify-content: flex-start; text-align: left; margin: 0; }
.action-menu-dropdown .btn + .btn { margin-top: 4px; }

/* ===== 徽章 ===== */
.badge { display: inline-flex; align-items: center; justify-content: center; min-width: 18px; height: 18px; padding: 0 5px; border-radius: 9px; font-size: 11px; font-weight: 600; background: var(--danger); color: #fff; }
.tag { display: inline-flex; align-items: center; padding: 2px 8px; border-radius: 4px; font-size: 12px; font-weight: 500; }
.tag-success { background: #d1fae5; color: #065f46; }
.tag-warning { background: #fef3c7; color: #92400e; }
.tag-danger  { background: #fee2e2; color: #991b1b; }
.tag-info    { background: #dbeafe; color: #1e40af; }
.tag-gray    { background: var(--gray-100); color: var(--gray-600); }
.tag-purple  { background: var(--primary-light); color: var(--primary-dark); }

/* ===== 分页 ===== */
.pagination { display: flex; align-items: center; justify-content: space-between; margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--gray-100); }
.pagination-info { font-size: 13px; color: var(--gray-500); }
.pagination-btns { display: flex; gap: 4px; }
.page-btn { padding: 6px 10px; border: 1px solid var(--gray-300); border-radius: 6px; background: #fff; cursor: pointer; font-size: 13px; color: var(--gray-700); transition: all .15s; }
.page-btn:hover { border-color: var(--primary); color: var(--primary); }
.page-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.page-btn:disabled { opacity: .4; cursor: not-allowed; }

/* ===== 弹窗 ===== */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.5); z-index: 1000; display: flex; align-items: center; justify-content: center; padding: 20px; }
.modal { background: #fff; border-radius: 12px; width: 100%; max-width: 560px; max-height: 90vh; display: flex; flex-direction: column; box-shadow: var(--shadow-lg); }
.modal-lg { max-width: 800px; }
.modal-header { display: flex; align-items: center; justify-content: space-between; padding: 16px 20px; border-bottom: 1px solid var(--gray-200); }
.modal-header h3 { font-size: 16px; font-weight: 600; }
.modal-close { background: none; border: none; font-size: 22px; cursor: pointer; color: var(--gray-400); line-height: 1; padding: 2px 6px; border-radius: 4px; }
.modal-close:hover { background: var(--gray-100); color: var(--gray-700); }
.modal-body { padding: 20px; overflow-y: auto; flex: 1; }
.modal-footer { padding: 14px 20px; border-top: 1px solid var(--gray-200); display: flex; justify-content: flex-end; gap: 10px; }

/* ===== Toast ===== */
.toast { position: fixed; top: 20px; right: 20px; z-index: 9999; padding: 12px 20px; border-radius: var(--radius); color: #fff; font-size: 14px; font-weight: 500; box-shadow: var(--shadow-lg); animation: slideIn .3s ease; max-width: 320px; }
.toast.success { background: var(--success); }
.toast.error   { background: var(--danger); }
.toast.warning { background: var(--warning); }
.toast.info    { background: var(--info); }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* ===== 空状态 ===== */
.empty-state { text-align: center; padding: 48px 20px; color: var(--gray-400); }
.empty-state .empty-icon { font-size: 48px; margin-bottom: 12px; }
.empty-state p { font-size: 14px; }

/* ===== 加载 ===== */
.loading { text-align: center; padding: 40px; color: var(--gray-400); }
.spinner { display: inline-block; width: 32px; height: 32px; border: 3px solid var(--gray-200); border-top-color: var(--primary); border-radius: 50%; animation: spin .7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== 头像 ===== */
.avatar { width: 36px; height: 36px; border-radius: 50%; object-fit: cover; background: var(--gray-200); display: inline-flex; align-items: center; justify-content: center; font-size: 14px; font-weight: 600; color: var(--gray-600); flex-shrink: 0; }

/* ===== 设置页 ===== */
.settings-section { margin-bottom: 28px; }
.settings-section h4 { font-size: 14px; font-weight: 600; color: var(--gray-700); margin-bottom: 14px; padding-bottom: 8px; border-bottom: 1px solid var(--gray-200); }
.switch { position: relative; display: inline-block; width: 44px; height: 24px; }
.switch input { opacity: 0; width: 0; height: 0; }
.slider { position: absolute; cursor: pointer; inset: 0; background: var(--gray-300); border-radius: 24px; transition: .3s; }
.slider:before { position: absolute; content: ""; height: 18px; width: 18px; left: 3px; bottom: 3px; background: #fff; border-radius: 50%; transition: .3s; }
input:checked + .slider { background: var(--primary); }
input:checked + .slider:before { transform: translateX(20px); }
.switch-wrap { display: flex; align-items: center; gap: 12px; }
.switch-label { font-size: 13px; color: var(--gray-600); }

/* 并排开关组 */
.inline-switches { display: flex; gap: 24px; flex-wrap: wrap; }
.inline-switch-item { display: flex; align-items: center; gap: 8px; }
.inline-switch-label { font-size: 13px; color: var(--gray-700); font-weight: 500; }
.switch-sm { width: 38px; height: 22px; }
.switch-sm .slider:before { height: 16px; width: 16px; }
.switch-sm input:checked + .slider:before { transform: translateX(16px); }

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .sidebar { width: var(--sidebar-collapsed); }
  .sidebar .logo-text, .sidebar .nav-label, .sidebar .nav-arrow { display: none; }
  .sidebar .nav-group-title { justify-content: center; }
  .sidebar .nav-item { justify-content: center; }
  .sidebar .nav-children { display: none; }
  .content-wrapper { margin-left: var(--sidebar-collapsed); }
  .charts-grid { grid-template-columns: 1fr; }
  .charts-grid-3 { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .form-row, .form-row-3 { grid-template-columns: 1fr; }
  .cs-chat-layout { flex-direction: column; }
  .cs-member-list { width: 100%; max-height: 200px; }
  .cs-chat-area { flex: 1; }
}

/* ===== 客服聊天界面 ===== */
.cs-chat-layout {
  display: flex;
  height: calc(100vh - var(--topbar-h) - 48px);
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.cs-member-list {
  width: 280px;
  border-right: 1px solid var(--gray-200);
  display: flex;
  flex-direction: column;
  background: var(--gray-50);
}

.cs-member-header {
  padding: 12px;
  border-bottom: 1px solid var(--gray-200);
}

.cs-search {
  width: 100%;
}

.cs-member-items {
  flex: 1;
  overflow-y: auto;
}

.cs-member-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px;
  cursor: pointer;
  border-bottom: 1px solid var(--gray-100);
  transition: background .15s;
}

.cs-member-item:hover {
  background: var(--gray-100);
}

.cs-member-item.active {
  background: var(--primary-light);
}

.cs-member-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  flex-shrink: 0;
  overflow: hidden;
}

.cs-member-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

.cs-member-info {
  flex: 1;
  min-width: 0;
}

.cs-member-name {
  font-weight: 500;
  color: var(--gray-800);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: 13px;
}

.cs-member-last {
  font-size: 12px;
  color: var(--gray-500);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 2px;
}

.cs-member-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
}

.cs-unread-badge {
  background: var(--danger);
  color: #fff;
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 10px;
  font-weight: 600;
}

.cs-member-time {
  font-size: 11px;
  color: var(--gray-400);
}

.cs-chat-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.cs-chat-header {
  padding: 12px 16px;
  border-bottom: 1px solid var(--gray-200);
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.cs-chat-title {
  font-weight: 600;
  color: var(--gray-800);
}

.cs-chat-phone {
  font-weight: 400;
  color: var(--gray-500);
  font-size: 13px;
}

.cs-chat-id {
  font-size: 12px;
  color: var(--gray-400);
}

.cs-chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  background: var(--gray-100);
}

.cs-msg {
  max-width: 70%;
  margin-bottom: 12px;
}

.cs-msg-admin {
  margin-left: auto;
  text-align: right;
}

.cs-msg-member {
  margin-right: auto;
}

.cs-msg-content {
  display: inline-block;
  padding: 10px 14px;
  border-radius: 12px;
  font-size: 14px;
  line-height: 1.5;
  word-break: break-word;
  text-align: left;
}

.cs-msg-admin .cs-msg-content {
  background: var(--primary);
  color: #fff;
  border-bottom-right-radius: 4px;
}

.cs-msg-member .cs-msg-content {
  background: #fff;
  color: var(--gray-800);
  border-bottom-left-radius: 4px;
  box-shadow: var(--shadow);
}

.cs-msg-time {
  font-size: 11px;
  color: var(--gray-400);
  margin-top: 4px;
}

.cs-chat-input {
  padding: 12px 16px;
  border-top: 1px solid var(--gray-200);
  background: #fff;
  display: flex;
  gap: 10px;
}

.cs-chat-input textarea {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  resize: none;
  font-family: inherit;
  font-size: 14px;
  outline: none;
}

.cs-chat-input textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.cs-chat-input .btn {
  align-self: flex-end;
  height: 40px;
}

/* WebSocket连接状态 */
.cs-ws-status {
  display: flex;
  align-items: center;
  margin-left: 8px;
}

.ws-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  transition: background-color 0.3s;
}

.ws-dot-online {
  background: var(--success);
  box-shadow: 0 0 6px var(--success);
}

.ws-dot-offline {
  background: var(--gray-400);
}