/* 幻灯片容器 */
    .slideshow-container {
      position: relative;
      margin: auto;
      min-width: 1200px;
    }
    
    /* 下一张 & 上一张 按钮 */
    .prev, .next {
      cursor: pointer;
      position: absolute;
      top: 50%;
      width: auto;
      margin-top: -22px;
      padding: 16px;
      color: white;
      font-weight: bold;
      font-size: 18px;
      transition: 0.6s ease;
      border-radius: 0 3px 3px 0;
    }
    
    /* 定位 "下一张" 按钮靠右 */
    .next {
      right: 0;
      border-radius: 3px 0 0 3px;
    }
    
    /* On hover, add a black background color with a little bit see-through */
    .prev:hover, .next:hover {
      background-color: rgba(0,0,0,0.8);
    }

    /* 标记符号 */
    .dot_box{position: absolute; width: 100%; bottom: 5%; text-align: center;}
    .dot {

      cursor:pointer;
      height: 13px;
      width: 13px;
      margin: 0 2px;
      background-color: #bbb;
      border-radius: 50%;
      display: inline-block;
      transition: background-color 0.6s ease;
    }
    
    .active, .dot:hover {
      background-color: #717171;
    }
    
    /* 淡出动画 */
    .fade {
      -webkit-animation-name: fade;
      -webkit-animation-duration: 1.5s;
      animation-name: fade;
      animation-duration: 1.5s;
    }
    
    @-webkit-keyframes fade {
      from {opacity: .4} 
      to {opacity: 1}
    }
    
    @keyframes fade {
      from {opacity: .4} 
      to {opacity: 1}
    }