body {
      background-color: #f5f7fa;
      font-family: "Microsoft YaHei", sans-serif;
      height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0;
      background-image: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
      background-size: cover;
      background-attachment: fixed;
    }
    
    .login-container {
      width: 900px;
      height: 550px;
      background-color: #fff;
      border-radius: 10px;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
      overflow: hidden;
      display: flex;
      position: relative;
    }
    
    /* 左侧品牌区域 */
    .login-brand {
      width: 45%;
      background-color: #2c3e50;
      color: #fff;
      padding: 50px 30px;
      box-sizing: border-box;
      position: relative;
      overflow: hidden;
    }
    
    .login-brand::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-image: url('https://picsum.photos/id/1040/600/800');
      background-size: cover;
      background-position: center;
      opacity: 0.3;
      z-index: 0;
    }
    
    .brand-content {
      position: relative;
      z-index: 1;
    }
    
    .brand-logo {
      font-size: 40px;
      margin-bottom: 20px;
      display: flex;
      align-items: center;
    }
    
    .brand-logo i {
      margin-right: 10px;
    }
    
    .brand-title {
      font-size: 24px;
      margin-bottom: 15px;
      font-weight: 600;
    }
    
    .brand-desc {
      font-size: 14px;
      line-height: 1.8;
      opacity: 0.9;
      margin-bottom: 30px;
    }
    
    .brand-features {
      list-style: none;
      padding: 0;
    }
    
    .brand-features li {
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      font-size: 13px;
    }
    
    .brand-features li i {
      margin-right: 8px;
      color: #3498db;
    }
    
    /* 右侧登录表单区域 */
    .login-form-container {
      width: 55%;
      padding: 60px 50px;
      box-sizing: border-box;
    }
    
    .login-title {
      font-size: 26px;
      color: #333;
      margin-bottom: 8px;
      font-weight: 600;
    }
    
    .login-subtitle {
      color: #666;
      font-size: 14px;
      margin-bottom: 40px;
    }
    
    .form-group {
      margin-bottom: 25px;
      position: relative;
    }
    
    .form-group .layui-icon {
      position: absolute;
      left: 12px;
      top: 50%;
      transform: translateY(-50%);
      color: #999;
    }
    
    .form-control {
      width: 100%;
      padding: 12px 15px 12px 40px;
      border: 1px solid #e6e6e6;
      border-radius: 4px;
      font-size: 14px;
      transition: all 0.3s;
      box-sizing: border-box;
    }
    
    .form-control:focus {
      border-color: #3498db;
      box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
      outline: none;
    }
    
    /* 验证码样式 */
    .captcha-group {
      display: flex;
      gap: 10px;
    }
    
    .captcha-input {
      flex: 1;
    }
    
    .captcha-img {
      width: 120px;
      height: 44px;
      border-radius: 4px;
      cursor: pointer;
      background-color: #f2f2f2;
    }
    
    .form-options {
      display: flex;
      justify-content: space-between;
      margin-bottom: 30px;
      font-size: 13px;
    }
    
    .remember-me {
      display: flex;
      align-items: center;
      color: #666;
    }
    
    .remember-me input {
      margin-right: 5px;
    }
    
    .forgot-password {
      color: #3498db;
      text-decoration: none;
      transition: color 0.3s;
    }
    
    .forgot-password:hover {
      color: #2980b9;
      text-decoration: underline;
    }
    
    .login-btn {
      width: 100%;
      padding: 12px 0;
      background-color: #3498db;
      color: #fff;
      border: none;
      border-radius: 4px;
      font-size: 16px;
      font-weight: 500;
      cursor: pointer;
      transition: all 0.3s;
    }
    
    .login-btn:hover {
      background-color: #2980b9;
    }
    
    .login-footer {
      margin-top: 30px;
      text-align: center;
      font-size: 13px;
      color: #999;
    }
    
    .login-footer a {
      color: #3498db;
      text-decoration: none;
    }
    
    .login-footer a:hover {
      text-decoration: underline;
    }
    
    /* 响应式设计 */
    @media (max-width: 768px) {
      .login-container {
        width: 90%;
        height: auto;
        flex-direction: column;
      }
      
      .login-brand {
        width: 100%;
        padding: 30px 20px;
      }
      
      .login-form-container {
        width: 100%;
        padding: 30px 20px;
      }
    }
    
    /* 加载动画 */
    @keyframes spin {
      0% { transform: rotate(0deg); }
      100% { transform: rotate(360deg); }
    }
    
    .loading {
      display: inline-block;
      width: 20px;
      height: 20px;
      border: 3px solid rgba(255,255,255,.3);
      border-radius: 50%;
      border-top-color: white;
      animation: spin 1s ease-in-out infinite;
      vertical-align: middle;
      margin-right: 8px;
    }