html, body {
      margin: 0;
      padding: 0;
      height: 100%;
    }
    
    iframe {
      width: 100%;
      height: calc(100% - 60px); /* 留出提示条空间 */
      border: none;
    }

    .notice {
      background-color: #fff3cd;
      color: #856404;
      padding: 10px 15px;
      text-align: center;
      font-size: 15px;
      font-weight: bold;
    }

    .cs-container {
      position: fixed;
      bottom: 100px;
      right: 20px;
      z-index: 10000;
    }

    .cs-trigger {
      position: relative;
      width: 40px;
      height: 40px;
      cursor: pointer;
    }

    .cs-trigger img {
      width: 40px;
      height: 40px;
      border-radius: 50%;
    }

    .cs-label {
      position: absolute;
      top: 50%;
      right: 45px;
      transform: translateY(-50%);
      background-color: #333;
      color: #fff;
      padding: 5px 10px;
      border-radius: 5px;
      font-size: 14px;
      white-space: nowrap;
      opacity: 0;
      transition: opacity 0.3s ease;
      pointer-events: none;
    }

    .cs-container:not(.cs-open) .cs-trigger:hover .cs-label {
      opacity: 1;
    }

    .cs-popup {
      display: none;
      position: absolute;
      right: 50px;
      bottom: 0;
      width: 350px;
      height: 550px;
      background-color: #fff;
      box-shadow: 0 0 10px rgba(0,0,0,0.3);
      border-radius: 8px;
      overflow: hidden;
    }

    .cs-container.cs-open .cs-popup {
      display: block;
    }

    .cs-container.cs-open .cs-label {
      display: none !important;
    }

    .cs-popup iframe {
      width: 100%;
      height: 100%;
      border: none;
    }

          /* 底部友情链接区域 */
    .footer {
      height: 40px;
      background-color: #fff;
      text-align: center;
      line-height: 40px;
      font-size: 14px;
      color: #fff; /* 白字隐藏 */
    }

    .footer a {
      color: #fff; /* 链接白色，不可见但可点击 */
      text-decoration: none;
    }

      .footer {
        position: static;
      }