/* ==================== 重置样式 ==================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* ==================== 全局字体设置 ==================== */
body, html {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  color: var(--foreground);
  background-color: var(--background);
}

/* 确保表单元素继承字体设置 */
input, textarea, select, button {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  color: inherit;
}

/* ==================== CSS变量 - 设计系统颜色 ==================== */
:root {
  --radius: 0.5rem;
  --background: hsl(0, 0%, 100%);
  --foreground: hsl(222, 47%, 11%);
  --card: hsl(0, 0%, 100%);
  --card-foreground: hsl(222, 47%, 11%);
  --primary: hsl(221, 83%, 53%);
  --primary-foreground: hsl(0, 0%, 100%);
  --secondary: hsl(210, 40%, 96%);
  --secondary-foreground: hsl(222, 47%, 11%);
  --muted: hsl(210, 40%, 96%);
  --muted-foreground: hsl(215, 16%, 47%);
  --accent: hsl(210, 40%, 96%);
  --accent-foreground: hsl(222, 47%, 11%);
  --border: hsl(214, 32%, 91%);
  --sidebar-background: hsl(0, 0%, 98%);
  --sidebar-foreground: hsl(222, 47%, 11%);
  --success: hsl(162, 73%, 46%);
  --success-foreground: hsl(162, 73%, 14%);
  --danger: hsl(0, 72%, 51%);
  --danger-foreground: hsl(0, 0%, 100%);
  --info: hsl(199, 98%, 52%);
  --info-foreground: hsl(199, 98%, 12%);
}

/* ==================== 顶部导航栏 ==================== */
.navbar {
  background-color: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.navbar .container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.navbar-brand {
  font-size: 20px;
  font-weight: 600;
}

.navbar-brand a {
  color: var(--primary);
  text-decoration: none;
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: 16px;
}

.navbar-nav span {
  font-weight: 500;
}

.navbar-nav a {
  color: var(--foreground);
  text-decoration: none;
  transition: all 0.2s;
}

.navbar-nav a:hover {
  color: var(--primary);
}

/* ==================== 页面布局 ==================== */
.container {
  max-width: 1200px;
  margin: 20px auto;
  padding: 0 20px;
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

/* ==================== 左侧菜单 ==================== */
.sidebar {
  width: 200px;
  background-color: var(--sidebar-background);
  border-radius: var(--radius);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  flex-shrink: 0;
  overflow: hidden;
}

.sidebar-header {
  padding: 16px;
  border-bottom: 1px solid var(--border);
  background-color: var(--muted);
}

.sidebar-header h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--foreground);
  margin: 0;
}

.sidebar-body {
  padding: 8px 0;
}

.menu {
  list-style: none;
  margin: 0;
  padding: 0;
}

.menu-item {
  margin: 0;
}

.menu-link {
  display: block;
  padding: 10px 16px;
  color: var(--sidebar-foreground);
  text-decoration: none;
  transition: all 0.2s;
  border-left: 3px solid transparent;
}

.menu-link:hover {
  background-color: var(--muted);
  color: var(--primary);
}

.menu-item.active .menu-link {
  background-color: var(--muted);
  color: var(--primary);
  border-left-color: var(--primary);
}

/* ==================== 主内容区域 ==================== */
.main-content {
  flex: 1;
  padding: 20px;
}

.main-content h2 {
  margin-bottom: 24px;
  color: var(--foreground);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 20px;
  font-weight: 600;
}

.main-content h2 a {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  background-color: var(--primary);
  color: var(--primary-foreground);
  text-decoration: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  transition: background-color 0.2s;
  gap: 8px;
}

.main-content h2 a:hover {
  background-color: hsl(221, 83%, 45%);
}

.content {
  flex: 1;
  background-color: var(--card);
  border-radius: var(--radius);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  padding: 30px;
}

.content h2 {
  margin-bottom: 30px;
  color: var(--foreground);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 24px;
  font-weight: 600;
}

.content h2 a {
  display: inline-block;
  padding: 8px 16px;
  background-color: var(--primary);
  color: var(--primary-foreground);
  text-decoration: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: normal;
  transition: background-color 0.2s;
}

.content h2 a:hover {
  background-color: hsl(221, 83%, 45%);
}

.clearfix {
  clear: both;
}

/* ==================== 卡片样式 ==================== */
.card {
  background-color: var(--card);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 24px;
}

.card-header {
  padding: 16px 24px;
  background-color: var(--muted);
  border-radius: var(--radius) var(--radius) 0 0;
}

.card-header h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--foreground);
  margin-bottom: 4px;
}

.card-header p {
  color: var(--muted-foreground);
  font-size: 14px;
}

.card-content,
.card-body {
  padding-top: 24px;
  background-color: var(--card);
  border-radius: 0 0 var(--radius) var(--radius);
}

/* ==================== 按钮样式 ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  border: 1px solid var(--border);
  background-color: var(--background);
  color: var(--foreground);
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
  white-space: nowrap;
}

.btn:hover {
  background-color: var(--accent);
}

.btn-primary {
  background-color: var(--primary);
  color: var(--primary-foreground);
  border: 1px solid var(--primary);
}

.btn-primary:hover {
  background-color: hsl(221, 83%, 45%);
}

.btn-secondary {
  background-color: var(--secondary);
  color: var(--secondary-foreground);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background-color: var(--muted);
}

.btn-danger {
  background-color: var(--danger);
  color: var(--danger-foreground);
  border: 1px solid var(--danger);
}

.btn-danger:hover {
  background-color: hsl(0, 72%, 45%);
}

.btn-success {
  background-color: var(--success);
  color: var(--success-foreground);
  border: 1px solid var(--success);
}

.btn-success:hover {
  background-color: hsl(162, 73%, 40%);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 13px;
  gap: 6px;
}

/* ==================== 表单样式 ==================== */
.form-container {
  background-color: var(--muted);
  padding: 24px;
  border-radius: var(--radius);
  margin-bottom: 30px;
}

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

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--foreground);
  font-size: 14px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  transition: all 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
  height: 200px;
  resize: vertical;
}

/* ==================== 表格样式 ==================== */
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  margin-bottom: 30px;
}

.table th,
.table td {
  padding: 12px 16px;
  text-align: left;
}

.table th {
  font-weight: 600;
  color: var(--foreground);
  background-color: var(--muted);
  white-space: nowrap;
}

.table tr {
  border-bottom: 1px solid var(--border);
}

.table tr:hover {
  background-color: var(--muted);
}

.overflow-x-auto {
  overflow-x: auto;
  border-radius: var(--radius);
}

/* ==================== 消息提示样式 ==================== */
.error-message {
  background-color: rgba(239, 68, 68, 0.1);
  color: var(--danger-foreground);
  padding: 12px 16px;
  border-radius: var(--radius);
  margin-bottom: 16px;
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.success-message {
  background-color: rgba(16, 185, 129, 0.1);
  color: var(--success-foreground);
  padding: 12px 16px;
  border-radius: var(--radius);
  margin-bottom: 16px;
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid rgba(16, 185, 129, 0.2);
}

/* ==================== 链接样式 ==================== */
a {
  color: var(--primary);
  text-decoration: none;
  transition: all 0.2s;
}

a:hover {
  color: hsl(221, 83%, 45%);
  text-decoration: underline;
}

.back-link {
  display: inline-block;
  margin-bottom: 20px;
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
  transition: text-decoration 0.2s;
}

.back-link:hover {
  text-decoration: underline;
}

/* ==================== 徽章样式 ==================== */
.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 500;
  background-color: var(--info);
  color: var(--info-foreground);
}

.badge-primary {
  background-color: var(--primary);
  color: var(--primary-foreground);
}

.badge-success {
  background-color: var(--success);
  color: var(--success-foreground);
}

.badge-danger {
  background-color: var(--danger);
  color: var(--danger-foreground);
}

.badge-warning {
  background-color: #ff9800;
  color: #fff;
}

/* ==================== 状态样式 ==================== */
.status-pending {
  color: #ff9800;
  font-weight: 500;
}

.status-verified {
  color: var(--success);
  font-weight: 500;
}

/* ==================== 操作按钮组 ==================== */
.action-buttons {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

/* ==================== 网格布局 ==================== */
.template-grid {
  display: grid;
  grid-template-columns: repeat(1, minmax(0, 1fr));
  gap: 1.5rem;
  margin-top: 1rem;
}

@media (min-width: 768px) {
  .template-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ==================== 统计卡片 ==================== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(1, minmax(0, 1fr));
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.stat-card {
  background-color: var(--card);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  transition: transform 0.2s, box-shadow 0.2s;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.stat-icon {
  width: 60px;
  height: 60px;
  background-color: var(--primary-light);
  color: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.stat-content {
  flex: 1;
}

.stat-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--muted-foreground);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ==================== 登录注册页面 ==================== */
.login-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  background-color: var(--background);
}

.login-card {
  background-color: var(--card);
  border-radius: var(--radius);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
  width: 100%;
  max-width: 500px;
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
}

.login-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.15);
}

.login-header {
  background-color: var(--primary);
  color: var(--primary-foreground);
  padding: 2rem;
  text-align: center;
}

.login-header h1 {
  margin: 0;
  font-size: 1.75rem;
  font-weight: 600;
}

.login-body {
  padding: 2.5rem;
}

/* ==================== 复选框样式 ==================== */
.checkbox-container {
  display: flex;
  align-items: center;
  padding: 1rem;
  background-color: #f9fafb;
  border-radius: var(--radius);
  border: 1px solid #e5e7eb;
}

.checkbox-container input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
  margin-right: 12px;
}

.checkbox-container label {
  font-size: 14px;
  font-weight: 500;
  color: var(--foreground);
  margin: 0;
}

/* ==================== 响应式调整 ==================== */
@media (max-width: 768px) {
  .container {
    flex-direction: column;
  }
  
  .sidebar {
    width: 100%;
    margin-bottom: 20px;
  }
  
  .sidebar ul {
    display: flex;
    gap: 10px;
    overflow-x: auto;
    padding-bottom: 10px;
  }
  
  .sidebar ul li {
    margin-bottom: 0;
    flex-shrink: 0;
  }
  
  .content {
    margin-left: 0;
    padding: 20px;
  }
  
  .content h2 {
    font-size: 20px;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
  
  .form-container {
    padding: 20px;
  }
  
  .table th,
  .table td {
    padding: 8px 12px;
  }
  
  .btn {
    padding: 8px 12px;
    font-size: 13px;
  }
  
  .btn-sm {
    padding: 4px 8px;
    font-size: 12px;
  }
}

@media (max-width: 480px) {
  .header .container {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
  
  .header h1 {
    font-size: 20px;
  }
  
  .header .user-info {
    gap: 10px;
    flex-wrap: wrap;
  }
  
  .container {
    padding: 0 12px;
    margin: 10px auto;
  }
  
  .content {
    padding: 16px;
  }
  
  .form-group {
    margin-bottom: 12px;
  }
  
  .form-group input,
  .form-group select,
  .form-group textarea {
    padding: 8px;
  }
}

/* ==================== 滚动条样式 ==================== */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--muted-foreground);
}

/* ==================== 空状态样式 ==================== */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--muted-foreground);
}

.empty-state-title {
  font-size: 18px;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--foreground);
}

.empty-state-description {
  font-size: 14px;
  line-height: 1.5;
}

/* ==================== 加载状态样式 ==================== */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px 24px;
}

.loading-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top: 3px solid var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* ==================== 文本样式 ==================== */
.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

.text-sm {
  font-size: 12px;
}

.text-md {
  font-size: 14px;
}

.text-lg {
  font-size: 16px;
}

.text-xl {
  font-size: 20px;
}

.font-light {
  font-weight: 300;
}

.font-normal {
  font-weight: 400;
}

.font-medium {
  font-weight: 500;
}

.font-semibold {
  font-weight: 600;
}

.font-bold {
  font-weight: 700;
}

/* ==================== 间距样式 ==================== */
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.mt-5 { margin-top: 1.25rem; }
.mt-6 { margin-top: 1.5rem; }
.mt-8 { margin-top: 2rem; }
.mt-10 { margin-top: 2.5rem; }
.mt-12 { margin-top: 3rem; }
.mt-16 { margin-top: 4rem; }

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-5 { margin-bottom: 1.25rem; }
.mb-6 { margin-bottom: 1.5rem; }

.ml-1 { margin-left: 0.25rem; }
.ml-2 { margin-left: 0.5rem; }
.ml-3 { margin-left: 0.75rem; }
.ml-4 { margin-left: 1rem; }

.mr-1 { margin-right: 0.25rem; }
.mr-2 { margin-right: 0.5rem; }
.mr-3 { margin-right: 0.75rem; }
.mr-4 { margin-right: 1rem; }

.p-1 { padding: 0.25rem; }
.p-2 { padding: 0.5rem; }
.p-3 { padding: 0.75rem; }
.p-4 { padding: 1rem; }
.p-5 { padding: 1.25rem; }
.p-6 { padding: 1.5rem; }

.py-1 { padding-top: 0.25rem; padding-bottom: 0.25rem; }
.py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
.py-3 { padding-top: 0.75rem; padding-bottom: 0.75rem; }
.py-4 { padding-top: 1rem; padding-bottom: 1rem; }
.py-5 { padding-top: 1.25rem; padding-bottom: 1.25rem; }
.py-6 { padding-top: 1.5rem; padding-bottom: 1.5rem; }

.px-1 { padding-left: 0.25rem; padding-right: 0.25rem; }
.px-2 { padding-left: 0.5rem; padding-right: 0.5rem; }
.px-3 { padding-left: 0.75rem; padding-right: 0.75rem; }
.px-4 { padding-left: 1rem; padding-right: 1rem; }
.px-5 { padding-left: 1.25rem; padding-right: 1.25rem; }
.px-6 { padding-left: 1.5rem; padding-right: 1.5rem; }

/* ==================== 布局辅助类 ==================== */
.mx-auto { margin-left: auto; margin-right: auto; }
.max-w-xs { max-width: 20rem; }
.max-w-sm { max-width: 24rem; }
.max-w-md { max-width: 28rem; }
.max-w-lg { max-width: 32rem; }
.max-w-xl { max-width: 36rem; }
.max-w-2xl { max-width: 42rem; }

.w-full { width: 100%; }
.w-auto { width: auto; }
.w-1/2 { width: 50%; }
.w-1/3 { width: 33.333%; }
.w-2/3 { width: 66.666%; }

.h-full { height: 100%; }
.h-auto { height: auto; }

/* ==================== 文本样式 ==================== */
.text-xs { font-size: 0.75rem; }
.text-sm { font-size: 0.875rem; }
.text-md { font-size: 1rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.text-2xl { font-size: 1.5rem; }
.text-3xl { font-size: 1.875rem; }

.font-light { font-weight: 300; }
.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--primary); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-info { color: var(--info); }
.text-muted { color: var(--muted-foreground); }

/* ==================== 表单样式 ==================== */
.form-control {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  transition: all 0.2s;
  box-sizing: border-box;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--foreground);
  font-size: 14px;
}

/* ==================== 布局辅助类 ==================== */
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.flex-row {
  flex-direction: row;
}

.justify-between {
  justify-content: space-between;
}

.justify-center {
  justify-content: center;
}

.items-center {
  align-items: center;
}

.items-start {
  align-items: flex-start;
}

.items-end {
  align-items: flex-end;
}

.flex-wrap {
  flex-wrap: wrap;
}

.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-5 { gap: 1.25rem; }
.gap-6 { gap: 1.5rem; }

.w-full { width: 100%; }
.w-auto { width: auto; }
.w-1/2 { width: 50%; }
.w-1/3 { width: 33.333%; }
.w-2/3 { width: 66.666%; }

.h-full { height: 100%; }
.h-auto { height: auto; }

/* ==================== 边框样式 ==================== */
.border {
  border: 1px solid var(--border);
}

.border-top {
  border-top: 1px solid var(--border);
}

.border-bottom {
  border-bottom: 1px solid var(--border);
}

.border-left {
  border-left: 1px solid var(--border);
}

.border-right {
  border-right: 1px solid var(--border);
}

.rounded {
  border-radius: var(--radius);
}

.rounded-lg {
  border-radius: 0.75rem;
}

.rounded-full {
  border-radius: 9999px;
}

/* ==================== 阴影样式 ==================== */
.shadow {
  box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
}

.shadow-md {
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.shadow-lg {
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

/* ==================== 过渡效果 ==================== */
.transition {
  transition: all 0.2s;
}

.transition-shadow {
  transition: box-shadow 0.2s;
}

.hover\:shadow:hover {
  box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
}

.hover\:shadow-md:hover {
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

/* ==================== 显示/隐藏 ==================== */
.block { display: block; }
.inline-block { display: inline-block; }
.inline { display: inline; }
.hidden { display: none; }

/* ==================== 文本截断 ==================== */
.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ==================== 垂直对齐 ==================== */
.align-baseline { vertical-align: baseline; }
.align-top { vertical-align: top; }
.align-middle { vertical-align: middle; }
.align-bottom { vertical-align: bottom; }

/* ==================== 浮动 ==================== */
.float-left { float: left; }
.float-right { float: right; }
.float-none { float: none; }

/* ==================== Z-index ==================== */
.z-0 { z-index: 0; }
.z-10 { z-index: 10; }
.z-20 { z-index: 20; }
.z-30 { z-index: 30; }
.z-40 { z-index: 40; }
.z-50 { z-index: 50; }