body {
    width: 1920px;
}
main,.content_box,.video_box {
    width: 100%;
    height: 100%;
} 
.main {
    position: relative;
}
.content_box {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 3;
    display: none;
}
.dim_box {
    display: none;
    width: 100%;
    height: 100%;
    z-index: 2;
    position: absolute;
    top: 0;
    left: 0;
    animation-duration: 0.5s;
    -webkit-animation-delay: 1s;
    animation-delay: 1s;
}
.dim_boxs {
    width: 100%;
    height: 100%;
    background-color: #fff;
    opacity: 0.4;
}
.afolre {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: #000;
}
video{
    min-width: 100%;  
    min-height: 100%;  
    height: auto;  
    width: auto;  
    z-index: 1;
}  
source{  
    min-width: 100%;  
    min-height: 100%;  
    height: auto;  
    width: auto;  
} 
.align_center {
    margin: 0px auto;
    display: table;
}
.typeface_box {
    width: 100%;
    margin-top: 0;
    animation-duration: 1s;
    -webkit-animation-delay: 1.2s;
    animation-delay: 1.2s;
}
.typeface {
    width: 54px;
    height: 54px;
    background-color: #383637;
    font-weight: 600;
    line-height: 54px;
    text-align: center;
    color: #fff;
    letter-spacing:1px;
}
.typeface a {
    color: #fff;
}
.chi {
    display: block;
}
.en {
    display: none;
}
.headline {
    margin-top: 180px;
    animation-duration: 1.5s;
    -webkit-animation-delay: 1.4s;
    animation-delay: 1.4s;
}
/* .headline img {
    width: 339px;
	height: 81px;
} */
.hint {
    margin-top: 49px;
    animation-duration: 2s;
    -webkit-animation-delay: 1.6s;
    animation-delay: 1.6s;
}
/* .hint img {
    width: 431px;
	height: 21px;
} */
.bnt_box {
    margin-top: 127px;
}
.bnt_box li a {
    width: 174px;
    padding: 18px 0; 
    text-align: center;
    font-weight: bold;
    background-color: #383637;
    color: #fff;
    font-size: 16px;
    margin-top: 30px;
    letter-spacing: 0.2px;
}
.bnt_box li:first-child a {
    margin-top: 0px;
}
.bnt1 {
    animation-duration: 2.5s;
    -webkit-animation-delay: 2s;
    animation-delay: 2s;
}
.bnt2 {
    animation-duration: 3s;
    -webkit-animation-delay: 2.4s;
    animation-delay: 2.4s;
}
.bnt3 {
    animation-duration: 3.5s;
    -webkit-animation-delay: 2.8s;
    animation-delay: 2.8s;
}
.bnt_box li a:hover {
    color: #7d7d7d;
}