#leftcontent{position:fixed; top:0; bottom:0; overflow:auto; overflow-x: hidden;}

@keyframes bling {
            0%{
                color: #428124;
            }
            25%{
                color: #236681;
            }
            50%{
                color: #392aa6;
            }
            100%{
                color: #817911;
            }
        }
@keyframes show{from{opcity:0} to{opcity:1}}
@keyframes hide{from{opcity:1} to{opcity:0}}
.lyc-title{font-size:14px; font-family: "Microsoft YaHei UI"; transition: all 2s; margin-top:190px;}
.lyc-title{animation-name: bling;animation-duration: 3s;animation-iteration-count: infinite;}
.lyc-title:hover{background-color: black;}
@keyframes inout {
            0% {
                opacity:1;
            }
            25% {
                opacity:0;
            }
            50% {
                opacity: 0;
            }
            75% {
                opacity:1;
            }
        }
img.first, img.second {position: absolute; left: 0; right: 0; }
img.first { z-index: 100; -webkit-animation:inout 12s linear 2s infinite alternate;
            -o-animation:inout 12s linear 2s infinite alternate;
            animation:inout 12s linear 2s infinite alternate;}