.header{
    height: 140px;
    background: rgba(3, 5, 8, 1);
}
.header .header_log{
    text-align: center;
    padding: 25px 0;
}
.header .header_log img{
    height: 35px;
    width: 246px;
    margin: auto;
}
.header .header_nav{
    min-width: 1280px;
    max-width: 1400px;
    box-sizing: border-box;
    margin: auto;
    padding: 0 120px;
    height: 54px;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    line-height: 54px;
}
.header .header_nav ul{
    display: flex;
    justify-content: space-between;
    margin-bottom: 0;
}
.header .header_nav ul li {
    position: relative;
    font-size: 16px;
    font-weight: 500;
    color: #FFFFFF;
    cursor: pointer;
}
.header .header_nav ul li a,
.header .header_nav ul li a:link,
.header .header_nav ul li a:visited,
.header .header_nav ul li a:hover
{
    font-size: 16px;
    font-weight: 500;
    color: #FFFFFF;
    text-decoration: none;
}

.header .header_nav ul .right-to-left::after{
    top: -1px;
    content: '';
    display: block;
    width: 0;
    height: 2px;
    position: absolute;
    left: -10px;
    background: #fefdfd;
    transition: all 0.2s ease-in-out;
}
.header .header_nav ul .right-to-left:hover::after{
    width:80px;
}
.header .header_nav ul .right-to-left:nth-of-type(1):hover::after{
    width:50px;
}
.header .header_nav ul li.active::after{
    top: -1px;
    content: '';
    display: block;
    width: 80px;
    height: 2px;
    position: absolute;
    left: -10px;
    background: #fefdfd;
    transition: all 0.2s ease-in-out;
}
.header .header_nav ul li:nth-of-type(1).active::after{
    top: -1px;
    content: '';
    display: block;
    width: 50px;
    height: 2px;
    position: absolute;
    left: -10px;
    background: #fefdfd;
    transition: all 0.2s ease-in-out;
}



.header .sub_menu{
    position: absolute;
    right: 0;
    left: 0;
    height:0;
    background: #FBFBFB;
    width: 100%;
    top: 140px;
    z-index: 99;
    transition: all 0.4s;
    overflow: hidden;
}
.header .sub_menu_list{
    min-width: 1280px;
    max-width: 1400px;
    margin: auto;
    padding: 0 120px;
}
.header .sub_menu_list ul{
    display: flex;
    justify-content: space-between;
}
.header .sub_menu_list ul li {
    display: flex;
    padding: 20px 0;
    transition: all .4s;
    margin: auto;
    opacity: 0;
}
.header .sub_menu .sub_menu_list ul li a{
    color: #000000 !important;
    height: 40px;
    line-height: 40px;
    padding-left: 0.5rem;
    transition: all .4s;
    display: inline-block;
    letter-spacing: 1px;
    font-size: 15px;
    font-weight: 600;
}