/* custom.css */
a.boxedThumb {
    display: block;
    padding: 4px;
    line-height: 20px;
    border: 1px solid #ddd;
    -webkit-border-radius: 4px;
    -moz-border-radius: 4px;
    border-radius: 4px;
    -webkit-box-shadow: 0 1px 3px rgba(0, 0, 0, 0.055);
    -moz-box-shadow: 0 1px 3px rgba(0, 0, 0, 0.055);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.055);
    -webkit-transition: -webkit-transform .15s ease;
    -moz-transition: -moz-transform .15s ease;
    -o-transition: -o-transform .15s ease;
    -ms-transition: -ms-transform .15s ease;
    transition: transform .15s ease;
  }
  
  a.boxedThumb:hover {
    -webkit-transform: scale(1.05);
    -moz-transform: scale(1.05);
    -o-transform: scale(1.05);
    -ms-transform: scale(1.05);
    transform: scale(1.05);
    z-index: 5;
  }
  #return-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: white; /* 白底 */
    color: #7a7979; /* 黑字 */
    width: 100px;
    height: 50px;
    text-align: center;
    line-height: 50px; /* 垂直居中 */
    border-radius: 10px; /* 圆角矩形 */
    border: 1px solid #ccc; /* 添加边框 */
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2); /* 添加阴影 */
    z-index: 1000;
    cursor: pointer;
    display: none; /* 默认隐藏 */
    font-size: 17px; /* 字体大小 */
    font-weight: bold; /* 字体加粗 */
}

#return-to-top:hover {
    background: #2094F3; /* 鼠标悬停时背景色 */
    border-color: #f0f0f0; /* 鼠标悬停时边框颜色 */
    color: white; /* 鼠标悬停时文字颜色变为蓝色 */
}