.verification-bg {
    background-image: url("../images/login_bg.jpg");
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    position: relative;
  }  

  .verification-bg::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
  }
  
  /* 科幻风格UI元素 */
  .scan-effect {    
    position: absolute;
    top: 1%;
    left: 0.5%;
    width: 99%;
    height: 98%;
    background: rgba(0, 15, 30, 0.70);
    border: 1px solid rgba(0, 195, 255, 0.5);
    box-shadow: 0 0 15px rgba(0, 150, 255, 0.7);
  }