*{
    margin: 0;
    padding: 0;
    text-decoration: none;
    list-style: none;
    box-sizing: border-box;
}
.head-top{
    background-color: rgba(71, 129, 199, 1);
    padding: 10px 0;
}
.center{
    width: 1300px;
    margin: auto;
}
.flex{
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.top-l{
    color: #BEDCF6;
    font-size: 14px;
}
.top-r{
    display: flex;
}
.top-r a{
    color: #ffd4ce;
    font-size: 14px;
    display: flex;
    align-items: center;
}
.top-c{
    cursor: pointer;
}
.nav{
    position: relative;
    background-color: rgba(31, 102, 191, 1);
}
.logo{
    display: block;
    width: 262px;
    height: 73px;
}
.logo img{
    width: 100%;
    height: 100%;
}
.nav-list{
    display: flex;
    position: relative;
}
.nav-list li{
    position: relative;
    width: 110px;
    height: 100px;
    border-left: 1px solid #fff;
}
.nav-list li span{
    display: block;
    width: 110px;
    height: 100px;
    text-align: center;
    line-height: 100px;
    color: #fff;
    position: absolute;
    left: 0;
    transition: .5s;
}
.nav-list{
    height: 100px;
    overflow: hidden;
}
.out{
    top: 0;
}
.over{
    top: -100px;
    background-color: #DD2711;
}
.nav-list li:hover .out{
    top: -100px !important;
}
.nav-list li:hover .over{
    top: 0px !important;
}
.search{
    width: 110px;
    height: 100px; 
    text-align: center;
    line-height: 130px;
    cursor: pointer;
}
.video video{
    min-width: 100%;
 
}
video:focus {
    outline: none
  }
.video{
    margin-top: -110px;
    position: relative;
    z-index: -1;
}
.about{
    background: #fff;
}

.nav-search{
    width: 290px;
    display: flex;
    position: absolute;
    bottom: -30px;
    right: 315px;
    display: none;
}
.nav-search input{
    width: 220px;
    height: 30px;
    border: 1px solid #f2f2f2;
    padding: 0 10px;
}
.nav-search span{
    width: 67px;
    line-height: 30px;
    text-align: center;
    background: rgba(71, 129, 199, 1);
    color: #fff;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.search-flex{
    display: flex;
}