/* ============================================================
   培训班管理系统- 完整样式表   设计风格: 青春靓丽、现代扁平化、圆角卡片   主色调 绿色(#2ECC71) + 橙色(#F39C12)
   布局: 移动端优先PWA 小程序风格   ============================================================ */

/* ==================== CSS 变量定义 ==================== */
:root {
  /* 主色调- 清新青绿色系 */
  --primary: #00D9C0;
  --primary-dark: #00B8A3;
  --primary-light: #A8F0E8;
  --primary-gradient: linear-gradient(135deg, #00D9C0 0%, #00B8A3 100%);

  /* 辅助色- 活力珊瑚橙 */
  --secondary: #FF6B6B;
  --secondary-dark: #EE5A5A;
  --secondary-light: #FFB4B4;
  --secondary-gradient: linear-gradient(135deg, #FF6B6B 0%, #EE5A5A 100%);

  /* 语义色 - 更清新的调色 */
  --success: #00D9C0;
  --warning: #FFB347;
  --danger: #FF6B6B;
  --danger-dark: #EE5A5A;
  --info: #4FACFE;
  --info-dark: #3A8BDE;

  /* 中性色 */
  --white: #FFFFFF;
  --gray-50: #F8F9FA;
  --gray-100: #F1F3F5;
  --gray-200: #E9ECEF;
  --gray-300: #DEE2E6;
  --gray-400: #CED4DA;
  --gray-500: #ADB5BD;
  --gray-600: #868E96;
  --gray-700: #495057;
  --gray-800: #343A40;
  --gray-900: #212529;
  --text-primary: #2D3436;
  --text-secondary: #636E72;
  --text-hint: #B2BEC3;
  --text-white: #FFFFFF;

  /* 背景色*/
  --bg-primary: #F5F6FA;
  --bg-card: #FFFFFF;
  --bg-overlay: rgba(0, 0, 0, 0.5);

  /* 间距 */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 12px;
  --spacing-lg: 16px;
  --spacing-xl: 20px;
  --spacing-xxl: 24px;
  --spacing-xxxl: 32px;

  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-full: 50%;

  /* 阴影 */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 12px 36px rgba(0, 0, 0, 0.16);
  --shadow-primary: 0 4px 14px rgba(0, 217, 192, 0.35);
  --shadow-secondary: 0 4px 14px rgba(255, 107, 107, 0.35);

  /* 字体 */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
    'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial,
    sans-serif;
  --font-size-xs: 11px;
  --font-size-sm: 13px;
  --font-size-md: 15px;
  --font-size-lg: 17px;
  --font-size-xl: 20px;
  --font-size-xxl: 24px;
  --font-size-xxxl: 30px;

  /* 布局 */
  --nav-height: 52px;
  --tab-height: 60px;
  --content-max-width: 768px;

  /* 过渡 */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-slow: 0.35s ease;

  /* 安全区域 */
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

/* ==================== 全局重置 ==================== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-md);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--primary-dark);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul,
ol {
  list-style: none;
}

input,
select,
textarea,
button {
  font-family: inherit;
  font-size: inherit;
  outline: none;
  border: none;
  background: none;
  -webkit-appearance: none;
  appearance: none;
}

button {
  cursor: pointer;
  touch-action: manipulation;
}

table {
  border-collapse: collapse;
  width: 100%;
}

/* 隐藏滚动条但保留滚动功能 */
::-webkit-scrollbar {
  width: 0;
  height: 0;
}

/* ==================== 登录页面 ==================== */
#login-page {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(160deg, #2ECC71 0%, #27AE60 40%, #1ABC9C 100%);
  padding: var(--spacing-xl);
  transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

#login-page.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

/* 登录页面装饰背景 */
#login-page::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -60px;
  width: 200px;
  height: 200px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
}

#login-page::after {
  content: '';
  position: absolute;
  bottom: -40px;
  left: -40px;
  width: 150px;
  height: 150px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-full);
}

.login-card {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 380px;
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xxxl) var(--spacing-xl);
  box-shadow: var(--shadow-xl);
  animation: loginSlideUp 0.5s ease-out;
}

@keyframes loginSlideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.login-logo {
  text-align: center;
  margin-bottom: var(--spacing-xxxl);
}

.login-logo .logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  background: var(--primary-gradient);
  border-radius: var(--radius-lg);
  font-size: 36px;
  margin-bottom: var(--spacing-md);
  box-shadow: var(--shadow-primary);
}

.login-logo .logo-title {
  font-size: var(--font-size-xxl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.login-logo .logo-subtitle {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.login-form .form-group {
  margin-bottom: var(--spacing-lg);
}

.login-form .form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

.login-form .form-input {
  width: 100%;
  height: 48px;
  padding: 0 var(--spacing-lg);
  background: var(--gray-50);
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-md);
  font-size: var(--font-size-md);
  color: var(--text-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.login-form .form-input:focus {
  border-color: var(--primary);
  background: var(--white);
  box-shadow: 0 0 0 3px rgba(46, 204, 113, 0.15);
}

.login-form .form-input::placeholder {
  color: var(--text-hint);
}

.login-btn {
  width: 100%;
  height: 50px;
  background: var(--primary-gradient);
  color: var(--text-white);
  font-size: var(--font-size-lg);
  font-weight: 600;
  border-radius: var(--radius-md);
  margin-top: var(--spacing-sm);
  box-shadow: var(--shadow-primary);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.login-btn:active {
  transform: scale(0.97);
  box-shadow: var(--shadow-sm);
}

.login-footer {
  text-align: center;
  margin-top: var(--spacing-xl);
  font-size: var(--font-size-sm);
  color: var(--text-hint);
}

/* ==================== 应用主容器==================== */
#app {
  display: none;
  min-height: 100vh;
  background: var(--bg-primary);
}

#app.active {
  display: block;
}

/* ==================== 顶部导航栏==================== */
.top-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--spacing-lg);
  box-shadow: 0 2px 15px rgba(0, 0, 0, 0.06);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  /* 适配刘海屏*/
  padding-top: var(--safe-top);
}

.top-nav .nav-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.3px;
}

.top-nav .nav-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.top-nav .nav-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  color: var(--gray-600);
  font-size: 18px;
  transition: all var(--transition-fast);
  background: var(--gray-100);
}

.top-nav .nav-btn:active {
  background: var(--gray-200);
  transform: scale(0.95);
}

.top-nav .nav-back {
  margin-right: var(--spacing-sm);
  font-size: 20px;
}

/* ==================== 底部Tab导航栏==================== */
.tab-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--tab-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  display: flex;
  align-items: stretch;
  justify-content: space-around;
  border-top: 1px solid rgba(0, 0, 0, 0.05);
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.06);
  /* 适配底部安全区域 */
  padding-bottom: var(--safe-bottom);
}

.tab-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  color: var(--gray-400);
  font-size: 10px;
  transition: all var(--transition-fast);
  position: relative;
  -webkit-user-select: none;
  user-select: none;
  cursor: pointer;
}

.tab-item .tab-icon {
  font-size: 26px;
  line-height: 1;
  transition: all var(--transition-fast);
  opacity: 0.6;
  color: var(--gray-500);
}

.tab-item .tab-icon.iconfont {
  font-family: "iconfont" !important;
  font-style: normal;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.tab-item .tab-label {
  font-weight: 600;
  line-height: 1.2;
  transition: all var(--transition-fast);
}

.tab-item.active {
  color: var(--primary);
}

.tab-item.active .tab-icon {
  transform: scale(1.1) translateY(-2px);
  opacity: 1;
  color: var(--primary);
}

.tab-item.active .tab-label {
  font-weight: 700;
}

/* Tab 选中指示器 - 现代风格 */
.tab-item.active::before {
  content: '';
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  background: var(--primary);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--primary);
}

.tab-item:active {
  opacity: 0.6;
}

/* ==================== 主内容区域==================== */
#pageContent {
  position: relative;
  padding-top: var(--nav-height);
  padding-bottom: calc(var(--tab-height) + var(--safe-bottom) + var(--spacing-lg));
  min-height: 100vh;
  max-width: var(--content-max-width);
  margin: 0 auto;
}

/* 页面容器 */
.page {
  padding: var(--spacing-lg);
  animation: pageFadeIn 0.3s ease-out;
}

@keyframes pageFadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 页面标题 */
.page-header {
  margin-bottom: var(--spacing-lg);
}

.page-header .page-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.page-header .page-desc {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

/* ==================== 卡片组件 ==================== */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
  border: 1px solid rgba(0, 0, 0, 0.03);
}

.card:active {
  transform: scale(0.99);
}

.card-clickable {
  cursor: pointer;
}

.card-clickable:active {
  box-shadow: var(--shadow-md);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-md);
}

.card-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-primary);
}

.card-subtitle {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-top: 2px;
}

.card-body {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  line-height: 1.7;
}

.card-footer {
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--spacing-sm);
}

/* ==================== 统计卡片 ==================== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.stat-card {
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  color: var(--text-white);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.stat-card::after {
  content: '';
  position: absolute;
  top: -20px;
  right: -20px;
  width: 80px;
  height: 80px;
  background: rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-full);
}

.stat-card .stat-icon {
  font-size: 24px;
  margin-bottom: var(--spacing-sm);
  opacity: 0.9;
}

.stat-card .stat-value {
  font-size: var(--font-size-xxl);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 2px;
}

.stat-card .stat-label {
  font-size: var(--font-size-sm);
  opacity: 0.85;
  font-weight: 500;
}

/* 统计卡片渐变色*/
.stat-card.green {
  background: linear-gradient(135deg, #2ECC71 0%, #27AE60 100%);
}

.stat-card.orange {
  background: linear-gradient(135deg, #F39C12 0%, #E67E22 100%);
}

.stat-card.blue {
  background: linear-gradient(135deg, #3498DB 0%, #2980B9 100%);
}

.stat-card.red {
  background: linear-gradient(135deg, #E74C3C 0%, #C0392B 100%);
}

.stat-card.purple {
  background: linear-gradient(135deg, #9B59B6 0%, #8E44AD 100%);
}

.stat-card.teal {
  background: linear-gradient(135deg, #1ABC9C 0%, #16A085 100%);
}

/* ==================== 表格样式 ==================== */
.table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--spacing-md);
}

.data-table {
  width: 100%;
  min-width: 500px;
}

.data-table thead {
  background: var(--gray-50);
}

.data-table th {
  padding: var(--spacing-md) var(--spacing-lg);
  text-align: left;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
  border-bottom: 2px solid var(--gray-200);
}

.data-table td {
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: var(--font-size-sm);
  color: var(--text-primary);
  border-bottom: 1px solid var(--gray-100);
  vertical-align: middle;
}

/* 斑马线*/
.data-table tbody tr:nth-child(even) {
  background: var(--gray-50);
}

.data-table tbody tr:last-child td {
  border-bottom: none;
}

.data-table tbody tr:active {
  background: var(--primary-light);
}

/* ==================== 表单样式 ==================== */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

.form-label .required {
  color: var(--danger);
  margin-left: 2px;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  height: 46px;
  padding: 0 var(--spacing-lg);
  background: var(--white);
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-md);
  font-size: var(--font-size-md);
  color: var(--text-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(46, 204, 113, 0.12);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-hint);
}

.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23636E72' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}

.form-textarea {
  height: auto;
  min-height: 100px;
  padding: var(--spacing-md) var(--spacing-lg);
  resize: vertical;
  line-height: 1.6;
}

.form-hint {
  font-size: var(--font-size-xs);
  color: var(--text-hint);
  margin-top: var(--spacing-xs);
}

.form-error {
  font-size: var(--font-size-xs);
  color: var(--danger);
  margin-top: var(--spacing-xs);
}

.form-input.error,
.form-select.error,
.form-textarea.error {
  border-color: var(--danger);
}

/* 表单行*/
.form-row {
  display: flex;
  gap: var(--spacing-md);
}

.form-row .form-group {
  flex: 1;
}

/* ==================== 按钮样式 ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  height: 44px;
  padding: 0 var(--spacing-xl);
  border-radius: var(--radius-md);
  font-size: var(--font-size-md);
  font-weight: 600;
  white-space: nowrap;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast),
    opacity var(--transition-fast);
  -webkit-user-select: none;
  user-select: none;
}

.btn:active {
  transform: scale(0.96);
}

.btn:disabled {
  opacity: 0.5;
  pointer-events: none;
}

/* 主要按钮 - 绿色 */
.btn-primary {
  background: var(--primary-gradient);
  color: var(--text-white);
  box-shadow: var(--shadow-primary);
}

.btn-primary:active {
  box-shadow: var(--shadow-sm);
}

/* 次要按钮 - 橙色 */
.btn-secondary {
  background: var(--secondary-gradient);
  color: var(--text-white);
  box-shadow: var(--shadow-secondary);
}

.btn-secondary:active {
  box-shadow: var(--shadow-sm);
}

/* 危险按钮 - 红色 */
.btn-danger {
  background: linear-gradient(135deg, #E74C3C 0%, #C0392B 100%);
  color: var(--text-white);
  box-shadow: 0 4px 14px rgba(231, 76, 60, 0.35);
}

/* 信息按钮 - 蓝色 */
.btn-info {
  background: linear-gradient(135deg, #3498DB 0%, #2980B9 100%);
  color: var(--text-white);
  box-shadow: 0 4px 14px rgba(52, 152, 219, 0.35);
}

/* 幽灵按钮 - 无背景*/
.btn-ghost {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-ghost:active {
  background: rgba(0, 217, 192, 0.08);
}

/* 轮廓按钮 */
.btn-outline {
  background: transparent;
  color: var(--text-secondary);
  border: 1.5px solid var(--gray-300);
}

.btn-outline:active {
  background: var(--gray-50);
}

/* 纯文字按钮*/
.btn-text {
  background: transparent;
  color: var(--primary);
  padding: 0 var(--spacing-sm);
  height: auto;
}

.btn-text:active {
  opacity: 0.7;
}

/* 按钮尺寸 */
.btn-sm {
  height: 32px;
  padding: 0 var(--spacing-md);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-sm);
}

.btn-lg {
  height: 52px;
  padding: 0 var(--spacing-xxxl);
  font-size: var(--font-size-lg);
  border-radius: var(--radius-lg);
}

.btn-block {
  width: 100%;
}

/* 圆形图标按钮 */
.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-full);
  font-size: 18px;
}

.btn-icon.btn-sm {
  width: 32px;
  height: 32px;
  font-size: 15px;
}

/* ==================== 模态框样式 ==================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 500;
  background: var(--bg-overlay);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  width: 100%;
  max-width: var(--content-max-width);
  max-height: 85vh;
  background: var(--white);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  display: flex;
  flex-direction: column;
  transform: translateY(100%);
  transition: transform var(--transition-slow);
}

.modal-overlay.active .modal {
  transform: translateY(0);
}

/* 模态框拖拽手柄 */
.modal-handle {
  display: flex;
  justify-content: center;
  padding: var(--spacing-md) 0 var(--spacing-sm);
}

.modal-handle::before {
  content: '';
  width: 36px;
  height: 4px;
  background: var(--gray-300);
  border-radius: 2px;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--spacing-lg) var(--spacing-md);
  border-bottom: 1px solid var(--gray-100);
}

.modal-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--text-primary);
}

.modal-close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  font-size: 20px;
  transition: background var(--transition-fast);
}

.modal-close:active {
  background: var(--gray-100);
}

.modal-body {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-lg);
  -webkit-overflow-scrolling: touch;
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  padding-bottom: calc(var(--spacing-md) + var(--safe-bottom));
  border-top: 1px solid var(--gray-100);
}

/* 居中模态框（用于确认对话框等） */
.modal-overlay.modal-center {
  align-items: center;
  padding: var(--spacing-xl);
}

.modal-overlay.modal-center .modal {
  border-radius: var(--radius-xl);
  max-height: 70vh;
  transform: scale(0.9);
  opacity: 0;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.modal-overlay.modal-center.active .modal {
  transform: scale(1);
  opacity: 1;
}

/* ==================== Toast 提示样式 ==================== */
#toast-container {
  position: fixed;
  top: calc(var(--nav-height) + var(--safe-top) + var(--spacing-md));
  left: 50%;
  transform: translateX(-50%);
  z-index: 999;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  pointer-events: none;
  width: 90%;
  max-width: 400px;
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-primary);
  pointer-events: auto;
  animation: toastSlideIn 0.35s ease-out forwards;
  border-left: 4px solid var(--gray-400);
}

.toast.toast-out {
  animation: toastSlideOut 0.3s ease-in forwards;
}

@keyframes toastSlideIn {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes toastSlideOut {
  from {
    opacity: 1;
    transform: translateY(0);
  }
  to {
    opacity: 0;
    transform: translateY(-20px);
  }
}

.toast-icon {
  font-size: 20px;
  flex-shrink: 0;
}

.toast-message {
  flex: 1;
  line-height: 1.4;
}

.toast-close {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  color: var(--text-hint);
  font-size: 16px;
}

/* Toast 类型 */
.toast.success {
  border-left-color: var(--success);
  background: linear-gradient(135deg, #f0fff4 0%, #ffffff 100%);
}

.toast.warning {
  border-left-color: var(--warning);
  background: linear-gradient(135deg, #fffbeb 0%, #ffffff 100%);
}

.toast.error {
  border-left-color: var(--danger);
  background: linear-gradient(135deg, #fff5f5 0%, #ffffff 100%);
}

.toast.info {
  border-left-color: var(--info);
  background: linear-gradient(135deg, #eff6ff 0%, #ffffff 100%);
}

/* ==================== 标签 / 徽章样式 ==================== */
.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 2px 10px;
  border-radius: 20px;
  font-size: var(--font-size-xs);
  font-weight: 600;
  line-height: 1.6;
  white-space: nowrap;
}

/* 出勤 - 绿色 */
.badge-success,
.badge-present {
  background: rgba(46, 204, 113, 0.12);
  color: #27AE60;
}

/* 请假 - 橙色 */
.badge-warning,
.badge-leave {
  background: rgba(243, 156, 18, 0.12);
  color: #E67E22;
}

/* 调课 - 蓝色 */
.badge-info,
.badge-reschedule {
  background: rgba(52, 152, 219, 0.12);
  color: #2980B9;
}

/* 缺勤 - 红色 */
.badge-danger,
.badge-absent {
  background: rgba(231, 76, 60, 0.12);
  color: #C0392B;
}

/* 灰色 */
.badge-default,
.badge-inactive {
  background: var(--gray-100);
  color: var(--gray-600);
}

/* 紫色 */
.badge-purple {
  background: rgba(155, 89, 182, 0.12);
  color: #8E44AD;
}

/* 数字徽章 */
.badge-count {
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  border-radius: 10px;
  background: var(--danger);
  color: var(--text-white);
  font-size: 11px;
  font-weight: 700;
  text-align: center;
  line-height: 20px;
}

/* ==================== 搜索框样式==================== */
.search-bar {
  position: relative;
  margin-bottom: var(--spacing-lg);
}

.search-bar .search-icon {
  position: absolute;
  left: var(--spacing-lg);
  top: 50%;
  transform: translateY(-50%);
  font-size: 16px;
  color: var(--text-hint);
  pointer-events: none;
}

.search-bar .search-input {
  width: 100%;
  height: 44px;
  padding: 0 var(--spacing-lg) 0 42px;
  background: var(--white);
  border: 2px solid var(--gray-200);
  border-radius: 22px;
  font-size: var(--font-size-md);
  color: var(--text-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.search-bar .search-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(46, 204, 113, 0.12);
}

.search-bar .search-input::placeholder {
  color: var(--text-hint);
}

.search-bar .search-clear {
  position: absolute;
  right: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  width: 24px;
  height: 24px;
  display: none;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  color: var(--text-hint);
  font-size: 14px;
}

.search-bar .search-input:not(:placeholder-shown) ~ .search-clear {
  display: flex;
}

/* ==================== 批量操作工具栏==================== */
.batch-toolbar {
  position: fixed;
  bottom: calc(var(--tab-height) + var(--safe-bottom));
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  z-index: 90;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--gray-900);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  transition: transform var(--transition-normal);
  max-width: calc(var(--content-max-width) - var(--spacing-xl) * 2);
}

.batch-toolbar.active {
  transform: translateX(-50%) translateY(0);
}

.batch-toolbar .batch-count {
  color: var(--text-white);
  font-size: var(--font-size-sm);
  font-weight: 600;
  white-space: nowrap;
  margin-right: var(--spacing-sm);
}

.batch-toolbar .batch-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: var(--spacing-sm) var(--spacing-md);
  background: rgba(255, 255, 255, 0.15);
  color: var(--text-white);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  font-weight: 500;
  white-space: nowrap;
  transition: background var(--transition-fast);
}

.batch-toolbar .batch-btn:active {
  background: rgba(255, 255, 255, 0.25);
}

.batch-toolbar .batch-btn.danger {
  background: rgba(231, 76, 60, 0.8);
}

/* ==================== 空状态提示==================== */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xxxl) var(--spacing-lg);
  text-align: center;
}

.empty-state .empty-icon {
  font-size: 64px;
  margin-bottom: var(--spacing-lg);
  opacity: 0.6;
}

.empty-state .empty-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.empty-state .empty-desc {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  max-width: 280px;
  line-height: 1.6;
}

.empty-state .empty-action {
  margin-top: var(--spacing-sm);
}

/* ==================== 加载动画 ==================== */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 800;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.85);
  gap: var(--spacing-lg);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.loading-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* 旋转圆环 */
.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--gray-200);
  border-top-color: var(--primary);
  border-radius: var(--radius-full);
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* 跳动圆点 */
.dots-loading {
  display: flex;
  gap: 6px;
}

.dots-loading .dot {
  width: 10px;
  height: 10px;
  background: var(--primary);
  border-radius: var(--radius-full);
  animation: dotBounce 1.4s ease-in-out infinite both;
}

.dots-loading .dot:nth-child(1) {
  animation-delay: -0.32s;
}

.dots-loading .dot:nth-child(2) {
  animation-delay: -0.16s;
}

.dots-loading .dot:nth-child(3) {
  animation-delay: 0s;
}

@keyframes dotBounce {
  0%,
  80%,
  100% {
    transform: scale(0.4);
    opacity: 0.4;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}

.loading-text {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  font-weight: 500;
}

/* 页面内联加载 */
.inline-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xxxl);
}

.inline-loading .spinner {
  width: 28px;
  height: 28px;
  border-width: 2.5px;
}

/* 骨架屏*/
.skeleton {
  background: linear-gradient(90deg, var(--gray-100) 25%, var(--gray-200) 50%, var(--gray-100) 75%);
  background-size: 200% 100%;
  animation: skeletonShimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

@keyframes skeletonShimmer {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

.skeleton-text {
  height: 16px;
  margin-bottom: var(--spacing-sm);
}

.skeleton-title {
  height: 22px;
  width: 60%;
  margin-bottom: var(--spacing-md);
}

.skeleton-avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
}

.skeleton-card {
  height: 120px;
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-md);
}

/* ==================== 列表项样式==================== */
.list-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--bg-card);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-sm);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast);
  cursor: pointer;
}

.list-item:active {
  transform: scale(0.98);
}

.list-item .item-avatar {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: var(--primary-gradient);
  color: var(--text-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-lg);
  font-weight: 700;
  flex-shrink: 0;
}

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

.list-item .item-title {
  font-size: var(--font-size-md);
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.list-item .item-desc {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 2px;
}

.list-item .item-right {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--spacing-xs);
}

.list-item .item-extra {
  font-size: var(--font-size-xs);
  color: var(--text-hint);
}

.list-item .item-arrow {
  color: var(--text-hint);
  font-size: 16px;
}

/* ==================== 分段控制器==================== */
.segment-control {
  display: flex;
  background: var(--gray-100);
  border-radius: var(--radius-md);
  padding: 3px;
  margin-bottom: var(--spacing-lg);
}

.segment-item {
  flex: 1;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.segment-item.active {
  background: var(--white);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

/* ==================== 图表容器 ==================== */
.chart-container {
  position: relative;
  width: 100%;
  padding: var(--spacing-md);
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--spacing-md);
  overflow: hidden;
}

.chart-container canvas {
  width: 100% !important;
  max-height: 200px;
}

/* ==================== 浮动操作按钮 ==================== */
.fab {
  position: fixed;
  right: var(--spacing-lg);
  bottom: calc(var(--tab-height) + var(--safe-bottom) + var(--spacing-lg));
  z-index: 80;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: var(--primary-gradient);
  color: var(--text-white);
  font-size: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-primary), var(--shadow-lg);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.fab:active {
  transform: scale(0.9);
  box-shadow: var(--shadow-sm);
}

/* ==================== 复选框样式 ==================== */
.checkbox-wrapper {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  -webkit-user-select: none;
  user-select: none;
}

.checkbox-wrapper input[type="checkbox"] {
  display: none;
}

.checkbox-custom {
  width: 22px;
  height: 22px;
  border: 2px solid var(--gray-300);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.checkbox-custom::after {
  content: '\2713';
  font-size: 14px;
  font-weight: 700;
  color: var(--text-white);
  opacity: 0;
  transform: scale(0.5);
  transition: all var(--transition-fast);
}

.checkbox-wrapper input[type="checkbox"]:checked + .checkbox-custom {
  background: var(--primary);
  border-color: var(--primary);
}

.checkbox-wrapper input[type="checkbox"]:checked + .checkbox-custom::after {
  opacity: 1;
  transform: scale(1);
}

/* ==================== 开关样式==================== */
.switch-wrapper {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  -webkit-user-select: none;
  user-select: none;
}

.switch-wrapper input[type="checkbox"] {
  display: none;
}

.switch-custom {
  width: 48px;
  height: 28px;
  background: var(--gray-300);
  border-radius: 14px;
  position: relative;
  transition: background var(--transition-fast);
  flex-shrink: 0;
}

.switch-custom::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 22px;
  height: 22px;
  background: var(--white);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast);
}

.switch-wrapper input[type="checkbox"]:checked + .switch-custom {
  background: var(--primary);
}

.switch-wrapper input[type="checkbox"]:checked + .switch-custom::after {
  transform: translateX(20px);
}

/* ==================== 头像组件 ==================== */
.avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  overflow: hidden;
  background: var(--primary-gradient);
  color: var(--text-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--font-size-md);
  flex-shrink: 0;
}

.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.avatar-sm {
  width: 32px;
  height: 32px;
  font-size: var(--font-size-sm);
}

.avatar-lg {
  width: 56px;
  height: 56px;
  font-size: var(--font-size-xl);
}

.avatar-xl {
  width: 72px;
  height: 72px;
  font-size: var(--font-size-xxl);
}

/* ==================== 分割线==================== */
.divider {
  height: 1px;
  background: var(--gray-200);
  margin: var(--spacing-lg) 0;
}

.divider-text {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  color: var(--text-hint);
  font-size: var(--font-size-sm);
}

.divider-text::before,
.divider-text::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--gray-200);
}

/* ==================== 页面切换过渡动画 ==================== */
.page-enter {
  animation: pageSlideInRight 0.3s ease-out forwards;
}

.page-exit {
  animation: pageSlideOutLeft 0.25s ease-in forwards;
}

@keyframes pageSlideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pageSlideOutLeft {
  from {
    opacity: 1;
    transform: translateX(0);
  }
  to {
    opacity: 0;
    transform: translateX(-30px);
  }
}

/* 淡入淡出 */
.page-fade-enter {
  animation: pageFadeIn 0.3s ease-out forwards;
}

.page-fade-exit {
  animation: pageFadeOut 0.2s ease-in forwards;
}

@keyframes pageFadeOut {
  from {
    opacity: 1;
  }
  to {
    opacity: 0;
  }
}

/* ==================== 下拉刷新指示器==================== */
.pull-refresh-indicator {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md);
  color: var(--text-hint);
  font-size: var(--font-size-sm);
}

/* ==================== 选项卡内容==================== */
.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: pageFadeIn 0.25s ease-out;
}

/* ==================== 工具类==================== */
.text-center {
  text-align: center;
}

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

.text-primary {
  color: var(--primary) !important;
}

.text-secondary {
  color: var(--text-secondary) !important;
}

.text-danger {
  color: var(--danger) !important;
}

.text-success {
  color: var(--success) !important;
}

.text-warning {
  color: var(--warning) !important;
}

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

.text-sm {
  font-size: var(--font-size-sm);
}

.text-xs {
  font-size: var(--font-size-xs);
}

.text-lg {
  font-size: var(--font-size-lg);
}

.text-xl {
  font-size: var(--font-size-xl);
}

.mt-sm {
  margin-top: var(--spacing-sm);
}

.mt-md {
  margin-top: var(--spacing-md);
}

.mt-lg {
  margin-top: var(--spacing-lg);
}

.mt-xl {
  margin-top: var(--spacing-xl);
}

.mb-sm {
  margin-bottom: var(--spacing-sm);
}

.mb-md {
  margin-bottom: var(--spacing-md);
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}

.mb-xl {
  margin-bottom: var(--spacing-xl);
}

.flex {
  display: flex;
}

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

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.gap-sm {
  gap: var(--spacing-sm);
}

.gap-md {
  gap: var(--spacing-md);
}

.gap-lg {
  gap: var(--spacing-lg);
}

.flex-1 {
  flex: 1;
}

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

.hidden {
  display: none !important;
}

.truncate {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ==================== 响应式断点==================== */

/* 手机竖屏 (默认, < 480px) */
@media (max-width: 479px) {
  :root {
    --spacing-lg: 14px;
    --spacing-xl: 18px;
    --spacing-xxl: 22px;
    --spacing-xxxl: 28px;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
  }

  .stat-card {
    padding: var(--spacing-md);
  }

  .stat-card .stat-value {
    font-size: var(--font-size-xl);
  }

  .form-row {
    flex-direction: column;
    gap: 0;
  }

  .modal-footer {
    flex-direction: column;
  }

  .modal-footer .btn {
    width: 100%;
  }
}

/* 手机横屏 / 小平板(480px - 767px) */
@media (min-width: 480px) and (max-width: 767px) {
  .stats-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page {
    padding: var(--spacing-xl);
  }
}

/* 平板 (768px - 1023px) */
@media (min-width: 768px) {
  :root {
    --nav-height: 56px;
    --tab-height: 64px;
  }

  #pageContent {
    padding-left: var(--spacing-xl);
    padding-right: var(--spacing-xl);
  }

  .stats-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page {
    padding: var(--spacing-xl);
  }

  /* 平板上模态框居中显示 */
  .modal-overlay {
    align-items: center;
    padding: var(--spacing-xl);
  }

  .modal {
    border-radius: var(--radius-xl);
    max-width: 560px;
    max-height: 80vh;
    transform: scale(0.9);
    opacity: 0;
    transition: transform var(--transition-normal), opacity var(--transition-normal);
  }

  .modal-overlay.active .modal {
    transform: scale(1);
    opacity: 1;
  }

  .modal-handle {
    display: none;
  }

  .modal-footer {
    padding-bottom: var(--spacing-lg);
  }

  .batch-toolbar {
    bottom: calc(var(--tab-height) + var(--safe-bottom) + var(--spacing-md));
  }
}

/* 桌面端(>= 1024px) */
@media (min-width: 1024px) {
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .page {
    padding: var(--spacing-xxl);
  }

  #pageContent {
    padding-left: var(--spacing-xxl);
    padding-right: var(--spacing-xxl);
  }
}

/* ==================== 深色模式支持（预留） ==================== */
@media (prefers-color-scheme: dark) {
  /* 暂不启用深色模式，后续可在此添加 */
}

/* ==================== 打印样式 ==================== */
@media print {
  .top-nav,
  .tab-bar,
  .fab,
  .batch-toolbar,
  #toast-container,
  .modal-overlay {
    display: none !important;
  }

  #pageContent {
    padding: 0;
  }

  .card {
    box-shadow: none;
    border: 1px solid var(--gray-200);
  }
}

/* ==================== 无障碍：减少动画 ==================== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}