* {
            margin: 0;
            padding: 0;
        }
        html,
        body {
            width: 100%;
            height: 100%;
            background-image: url("https://uploadbeta.com/api/pictures/random/?key=BingEverydayWallpaperPicture");
            background-repeat: no-repeat;
            background-size: 100% 100%;
            background-attachment: fixed;
            cursor: url(https://files.cnblogs.com/files/wkfvawl/cursor.ico),auto;
        }
      #home {
            background-color: #d8e3e7;
           border-radius: 40px;
            opacity: 0.8;
        }
      @keyframes w {
            0%{}
            100% {
                width: 175px;
            }
        }
      #blogTitle h2 { 
               display: block;
               width: 0;
              height: 32px;
              animation: w 4s steps(7) infinite alternate   forwards;
              white-space: nowrap;
              overflow: hidden;
              font-family:  华文行楷;
               font-size: 25px;
              color: #ed556a;
             }
       #audioBtn {
            width: 50px;
            height: 50px;
            display: block;
            background-size: 100% 100%;
            position: fixed;
            top: 20px;
            right: 20px;
            border-radius: 50%;
            opacity: 0.6;
        }

        .open_music {
            background: #fff url(https://images.cnblogs.com/cnblogs_com/jiong-ling/1818899/t_2008021215371.png) no-repeat;
        }

        .close_music {
            background: #fff url(https://images.cnblogs.com/cnblogs_com/jiong-ling/1818899/t_2008021215422.png) no-repeat;
        }

       #audioBtn:hover {
            transform: scale(1.3);
        }
      .top {
            display:none;
            position: fixed;
            left:50%; 
            margin-left:600px;
            bottom: 110px;          
            width: 100px;
            height: 100px;
            background-size: 100% 100%;
            background-image: url("https://images.cnblogs.com/cnblogs_com/jiong-ling/1818899/t_200811062022%E7%81%AB%E7%AE%AD%E5%8F%91%E5%B0%84%E5%8F%B0.SVG.png?a=1599736541561");
            }
        .top:hover {
            background-image: url("https://images.cnblogs.com/cnblogs_com/jiong-ling/1818899/t_200811062003%E7%81%AB%E7%AE%AD%E5%8F%91%E5%B0%84.SVG.png?a=1597127046263");
        }