* {
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
}
#div_container {
    height: 500px;
    width: 920px;
}
#div_textintro {
    display: inline-block;
    width: 260px;
    padding: 20px;
    margin-right: 20px;
    height: 460px;
}
#p_textintro {
    margin: 0px;
}
#div_enter {
    float: right;
    display: inline-block;
    width: 640px;
}
#div_img {
    width: 640px;
    height: 420px;
    overflow: hidden;
}
#ul_intro {
    margin: 0px;
    padding: 0px;
    list-style: none;
}
.li_img {
    display: block;
}
.img_intro {
    width: 640px;
    height: 420px;
    display: block;
    transition: height 1s linear;
}
.img_intro.hide {
    height: 0px;
}
#div_go {
    height: 40px;
    width: 640px;
    margin: 5px 0;
}
#a_go {
    text-decoration: none;
    display: block;
    height: 40px;
    width: 0px;
    overflow: hidden;
    -webkit-animation: goflash 1.6s 1.6s infinite;
    animation: goflash 1.6s 1.6s infinite;
    transition: width 1.6s ease;
}
#span_go {
    color: rgb(192, 192, 192);
    height: 40px;
    font: Consolas;
    font-size: 24px;
    width: 600px;
    white-space: nowrap;
}
#a_go.show {
    width: 600px;
}
#a_go:hover #span_go {
    color: rgb(0, 191, 255);
}
@-webkit-keyframes goflash {
    0% {
        -webkit-transform: translateX(0px);
        transform: translateX(0px);
        opacity: 1;
    }
    100% {
        -webkit-transform: translateX(40px);
        transform: translateX(40px);
        opacity: 0.5;
    }
}
@keyframes goflash {
    0% {
        -webkit-transform: translateX(0px);
        transform: translateX(0px);
        opacity: 1;
    }
    100% {
        -webkit-transform: translateX(40px);
        transform: translateX(40px);
        opacity: 0.5;
    }
}