/* 全局变量 */
:root {
    --primary-color: #3498db;
    --secondary-color: #2980b9;
    --text-color: #333;
    --light-gray: #f5f5f5;
    --border-radius: 4px;
    /* 新增通用变量 */
    --border-color: #ddd;
    --warning-color: #f39c12;
    --warning-hover: #e67e22;
    --danger-color: #e74c3c;
    --danger-hover: #c0392b;
    --success-color: #2ecc71;
    --info-color: #3498db;
  }
  
  /* 基础重置 */
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  }
  
  body {
    background-color: #f9f9f9;
    color: var(--text-color);
    line-height: 1.6;
  }
  
  /* 布局结构 */
  .app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
  }
  
  .header {
    background-color: var(--primary-color);
    color: white;
    padding: 1rem;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  }
  
  .main-content {
    flex: 1;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
  }
  
  .footer {
    background-color: var(--primary-color);
    color: white;
    text-align: center;
    padding: 1rem;
    margin-top: auto;
  }
  
  /* 通用组件 */
  .button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.3s ease;
}
  
  .button:hover {
    background-color: var(--secondary-color);
  }
  
  .card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 1.5rem;
    margin-bottom: 1rem;
  }

  /* 添加通用模态框样式 - 所有页面共用 */
  .modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
  }

  .modal.hidden {
    display: none;
  }
  
  .modal-content {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    width: 100%;
    position: relative;
  }
  
  .modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 1.5rem;
    cursor: pointer;
  }

/* 通用表单组样式 - 所有页面共用 */
.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.5rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
}