/* 全局样式 */
:root {
    --primary-color: #e63946;
    --primary-dark: #d62828;
    --secondary-color: #457b9d;
    --light-color: #f1faee;
    --dark-color: #1d3557;
    --gray-color: #6c757d;
    --light-gray: #f8f9fa;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
  }
  
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
  }
  
  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
  }
  
  /* 导航栏样式 */
  .navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
  }
  
  .nav-link {
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
  }
  
  .nav-link:hover {
    color: var(--primary-color) !important;
    transform: translateY(-2px);
  }
  
  .nav-link.active {
    color: var(--primary-color) !important;
  }
  
  .nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
  }
  
  /* 按钮样式 */
  .btn-main {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    font-weight: 500;
    padding: 0.5rem 1.5rem;
    transition: all 0.3s ease;
  }
  
  .btn-main:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(230, 57, 70, 0.3);
  }
  
  .btn-outline-main {
    color: var(--primary-color);
    border-color: var(--primary-color);
  }
  
  .btn-outline-main:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
  }
  
  /* 卡片样式 */
  .card {
    border: none;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    overflow: hidden;
  }
  
  .card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
  }
  
  .card-header {
    background-color: var(--dark-color);
    color: white;
    border-bottom: none;
    padding: 1rem 1.5rem;
  }
  
  .card-title {
    color: var(--dark-color);
    font-weight: 600;
    margin-bottom: 1rem;
  }
  
  /* 页脚样式 */
  .footer {
    background-color: var(--dark-color);
    color: white;
    padding: 3rem 0 2rem;
    margin-top: 4rem;
  }
  
  .footer h5 {
    color: var(--light-color);
    margin-bottom: 1.5rem;
    font-weight: 600;
  }
  
  .footer a {
    color: #adb5bd;
    transition: color 0.3s ease;
  }
  
  .footer a:hover {
    color: var(--primary-color);
    text-decoration: none;
  }
  
  /* 表单样式 */
  .form-control {
    border-radius: 5px;
    border: 1px solid #ced4da;
    padding: 0.75rem 1rem;
    transition: all 0.3s ease;
  }
  
  .form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(230, 57, 70, 0.25);
  }
  
  .form-label {
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--dark-color);
  }
  
  /* 表格样式 */
  .table {
    border-collapse: separate;
    border-spacing: 0;
  }
  
  .table th {
    background-color: var(--light-gray);
    color: var(--dark-color);
    font-weight: 600;
    border-top: 1px solid #dee2e6;
  }
  
  .table-striped tbody tr:nth-of-type(odd) {
    background-color: rgba(0, 0, 0, 0.02);
  }
  
  /* 模态框样式 */
  .modal-header {
    background-color: var(--dark-color);
    color: white;
    border-bottom: none;
  }
  
  .modal-title {
    font-weight: 600;
  }
  
  /* 响应式调整 */
  @media (max-width: 768px) {
    .hero h1 {
      font-size: 2rem;
    }
    
    .hero p.lead {
      font-size: 1rem;
    }
    
    .card {
      margin-bottom: 1.5rem;
    }
  }
  
  /* 动画效果 */
  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
  }
  
  .fade-in {
    animation: fadeIn 0.5s ease forwards;
  }
  
  /* 加载动画 */
  .loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
  }
  
  @keyframes spin {
    to { transform: rotate(360deg); }
  }