*{margin: 0;padding: 0;}
img{
    display: block;
    max-width: 100%;
}
.header{
    background-color: #010101;
    height: 6.94vw;
    overflow: hidden;
}
.logo1,.logo2{
    padding: 0.7% 2.5%;
    float: left;
}
.logo1 img,.logo2 img{
    height: 5.55vw;
}
.logo2{
    float: right;
}
.video{
    height: 55.44vw;
    position: relative;
    overflow: hidden;
}
.video img{
    width: 100%;
    height: 62.44vw;
}
.countdown{
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    align-items: center;
    background-color: rgba(0, 0, 0, 0.66);
    z-index: 100;
}
.countdown_in{
    text-align: center;
    color: #fff;
    width: 100%;
}
.countdown_in h3{
    font-size: 6.66vw;
    font-weight: normal;
}
.countdown_in p{
    margin-top: 5%;
}
.countdown_in p strong{
    display: inline-block;
    padding: 2.5% 0;
    background-color: #1e191f;
    border: 2px solid #707676;
    border-radius: 15%;
    vertical-align: bottom;
    font-size: 4vw;
    margin:0 0.5%;
    width: 9.25%;
}
.countdown_in p span{
    font-size: 2.77vw;
}
.nav{
    border-bottom: 2px solid #ddd;
    display: flex;
    position: relative;
}
.nav_l,.nav_r{
    width: 50%;
    float: left;
    text-align: center;
}
.nav a{
    font-size: 4vw;
    display: inline-block;
    text-decoration: none;
    color: #333;
    padding: 5%;
    
}
.nav .active a{
    color:#3787e8;
}
.nav_line{
    position: absolute;
    bottom: -2px;
    width: 10%;
    height: 2px;
    background-color: #3787e8;
    left: 20%;
    transition: left .2s linear;
}
.nav_on{
    left: 70%;
}
.about{
    
}
.discuss{
    display: none;  
    background-color: #f6f6f6;
    height:55vh;
}
.send_wrap{
    background-color: #fff;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 17vw;
    box-sizing: border-box;
    padding: 2% 5%;
    z-index: 200;
}
.send{
    border-radius: 8px;
    background-color: #eef1f8;
    position: relative;
}
.send input{
    background-color: #eef1f8;
    display: block;
    width: 85%;
    border-radius: 8px;
    border: none;
    line-height: 10vw;
    height: 10vw;
    box-sizing: border-box;
    padding-left: 4%;
    outline: none;
    font-size: 3.24vw;
    
}
.send a{
    display: block;
    float: right;
    width: 15%;
    height: 10vw;
    position: absolute;
    right: 0;
    top: 0;
    z-index: 10;
    background: url(../images/icon3.jpg) no-repeat;
    background-size: auto 70%;
    background-position: center;
}
.about_top{
    padding: 3.5% 3.5% 0 ;
    border-bottom: 1px solid #eaeaea;
}
.about h3{
    font-size: 4.6vw;
    margin-bottom: 3%;
    color: #333;
    
}
.about p{
    font-size: 4vw;
    color: #5e5e5e;
    margin-bottom: 2.5%;
}
.about_top p span{
    margin-right: 5%;
}
.about_top p img{
    display: inline-block;
    width: 6.944vw;
    vertical-align: middle;
}
.about_top .about_time{
    color: #989898;
    font-size: 3.33vw;
    background: url(../images/icon2.jpg) no-repeat left top;
    background-size: 5% auto;
    padding-left: 5%;
    overflow: hidden;
}
.about_top .about_time span{
    float: right;
}
.about_bot{
    padding: 3.5%;
}