* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body, html {
      height: 100%;
      font-family: 'Arial', sans-serif;
      position: relative;
    }

    /* 背景容器 */
    .background-container {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      z-index: -1; /* 确保在最底层 */
    }

    /* 单个背景项 */
    .background-item {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-size: cover;
      background-position: center center;
      background-attachment: fixed;
      opacity: 0;
      transition: opacity 1.2s ease-in-out;
    }

    .background-item.active {
      opacity: 1;
    }

    /* 内容容器 */
    .content-wrapper {
      position: relative;
      z-index: 10; /* 高于背景层 */
      min-height: 100vh;
      padding: 20px;
    }

    /* 用户原有样式保持不变 */
    .layadmin-user-login {
      padding-top: calc(1vh - 20px);
      width: 100%;
      height: 100vh;
      position: relative;
    }

    /* 页面内容样式 */
    .page-header {
      text-align: center;
      padding: 40px 0;
      color: white;
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
    }

    .card-container {
      max-width: 800px;
      margin: 0 auto;
      background: rgba(255, 255, 255, 0.9);
      border-radius: 15px;
      padding: 30px;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
      backdrop-filter: blur(10px);
    }

    .controls {
      position: fixed;
      bottom: 30px;
      left: 50%;
      transform: translateX(-50%);
      z-index: 100;
      display: flex;
      gap: 15px;
      background: rgba(0, 0, 0, 0.6);
      padding: 12px 20px;
      border-radius: 30px;
      backdrop-filter: blur(10px);
    }

    .control-btn {
      background: rgba(255, 255, 255, 0.2);
      border: 2px solid rgba(255, 255, 255, 0.3);
      color: white;
      width: 40px;
      height: 40px;
      border-radius: 50%;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all 0.3s ease;
    }

    .control-btn:hover {
      background: rgba(255, 255, 255, 0.3);
      transform: scale(1.1);
    }

    .indicators {
      position: fixed;
      bottom: 90px;
      left: 50%;
      transform: translateX(-50%);
      z-index: 100;
      display: flex;
      gap: 20px; /*圆形时需为10px*/
    }

    .indicator {
/* 圆形
      width: 12px;
      height: 12px;
      border-radius: 50%;
*/
    width: 50px;
    height: 5px;
    border-radius: 12px;

      background: rgba(255, 255, 255, 0.4);
      cursor: pointer;
      transition: all 0.3s ease;
    }

    .indicator.active {
      background: #0437fc;
      transform: scale(1.2);
    }