/* 重置样式 */
        * {
          margin: 0;
          padding: 0;
          box-sizing: border-box;
        }
        body {
          font-family: 'Roboto', sans-serif;
          background: url('back.jpg') no-repeat center center fixed;
          background-size: cover;
          display: flex;
          justify-content: center;
          align-items: center;
          min-height: 100vh;
        }
        .login-container {
          background-color: rgba(255, 255, 255, 0.15);
          padding: 40px;
          border-radius: 12px;
          box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
          backdrop-filter: blur(8px);
          -webkit-backdrop-filter: blur(8px);
          border: 1px solid rgba(255, 255, 255, 0.18);
          width: 100%;
          max-width: 400px;
          text-align: center;
        }
        .login-container h2 {
          margin-bottom: 30px;
          color: #ffffff;
          font-size: 32px;
        }
        .login-container input {
          width: 100%;
          padding: 15px;
          margin-bottom: 20px;
          border: none;
          border-radius: 30px;
          background: rgba(255, 255, 255, 0.2);
          color: #ffffff;
          font-size: 16px;
          outline: none;
        }
        .login-container input::placeholder {
          color: #e0e0e0;
        }
        .login-container button {
          width: 100%;
          padding: 15px;
          border: none;
          border-radius: 30px;
          background-color: #ffffff;
          color: #4e54c8;
          font-size: 18px;
          font-weight: bold;
          cursor: pointer;
          transition: background-color 0.3s ease;
        }
        .login-container button:hover {
          background-color: #e0e0e0;
        }
        /* 响应式设计 */
        @media (max-width: 480px) {
          .login-container {
            padding: 30px 20px;
          }
          .login-container h2 {
            font-size: 28px;
          }
          .login-container input, .login-container button {
            padding: 12px;
            font-size: 14px;
          }
        }