/*    清除所有元素内外边界      */
        * { padding:0;    margin:0;}
        body {
            background-image: url('https://static.runoob.com/images/mix/paper.gif');
            background-color: #cccccc;
        }
        
        .pics {
            background-image: url('https://img0.baidu.com/it/u=2090683447,1450841930&fm=224&fmt=auto&gp=0.jpg');
        }
        
        .blue {
            color: rgb(8, 69, 235);
            text-indent: 30px;
        }
        
        .yellow {
            color: rgb(235, 193, 8);
            font-size: 19px;
        }
        .box {
            width:100%;
            border: 3px solid white;
            background-image: url('https://api.vvhan.com/api/acgimg');    
/*          https://tenapi.cn/acg      */
        }
        .words_box {
            background-image: url('https://img0.baidu.com/it/u=255820472,3712711141&fm=253&fmt=auto&app=138&f=GIF?w=1000&h=200');
        }
/* 滑动栏 */
        ::-webkit-scrollbar {
            width: 5px;
            height: 5px;
        }
        ::-webkit-scrollbar-thumb{
            background-color: #999;
            -webkit-border-radius: 5px;
            border-radius: 5px;
        }
        ::-webkit-scrollbar-thumb:vertical:hover{
            background-color: #666;
        }
        ::-webkit-scrollbar-thumb:vertical:active{
            background-color: #333;
        }
        ::-webkit-scrollbar-button{
            display: none;
        }
        ::-webkit-scrollbar-track{
            background-color: #f1f1f1;
        }