header {
    position: fixed;
    top: 30px;
    left: 0;
    right: 0;
    z-index: 9;
    height: 80px;
    background-color: #12083d;
}
header>.wrap .flex {
    justify-content: space-between;
    align-items: center;
    height: 100%;
}
header .menu {
    display: -webkit-flex;
    display: -moz-flex;
    display: -ms-flex;
    display: -o-flex;
    display: flex;
    height: 100%;
    align-items: center;
    font-size: 14px;
}
header .menu .on,header .menu .on:hover {
    color: #7E94FF;
}
header .menu>a,
header .menu .drop {
    padding: 0 15px;
    line-height: 80px;
}
header .menu>a:hover {
    color: #7E94FF;
}
header .menu .drop {
    position: relative;
    line-height: 80px;
}
header .menu .drop::after {
    content: "";
    display: inline-block;
    margin-left: 10px;
    vertical-align: -2px;
    border-width: 5px;
    border-style: solid;
    height: 0;
    border-color: #fff transparent transparent transparent;
}
header .menu .drop:hover {
    background-color: #7E94FF;
    color: #fff;
    cursor: pointer;
}
header .menu .drop .item {
    position: absolute;
    top: 80px;
    left: -9999999px;
    white-space: nowrap;
    line-height: 40px;
    background-color: #1e194d;
}
header .menu .drop:hover .item {
    left: 0;
}
header .menu .drop .item>a {
    display: block;
    padding: 0 15px;
}
header .menu .drop .item>a:hover {
    background-color: #8d277a;
    color: #fff;
}
header .menu .enter {
    margin-left: 30px;
    width: 120px;
    line-height: 40px;
    background: #999;
    text-align: center;
    border-radius: 20px;

}
header .menu .enter:hover {
    background: #999;
}
header .logo img:first-child {
    width: 83px;
}
header .logo img:last-child {
    width: 85px;
}
header .top_back_btn {
    margin-left: 30px;
    width: 120px;
    line-height: 40px!important;
    font-size: 16px;
    font-weight: 500;
    text-align: center;
    border-radius: 4px;
    color: #fff;
    box-sizing: border-box;
    background: linear-gradient(#395aff 0%, #7293ff 100%);
}
header .top_back_btn:hover {
    color: #FFF!important;
    background: linear-gradient(#3151f8 0%, #6487fa 100%);
}

@media (max-width: 750px) {
    header {
        position: fixed;
        z-index: 9;
        top: 0;
        left: 0;
        right: 0;
        height: 0.8rem;
        margin-right: 0!important;
    }
    header .wrap {
        height: 0.8rem;
    }
    header .logo img:first-child {
        width: 1.11rem;
    }
    header .logo img:last-child {
        width: .95rem;
    }
    header .menu {
        flex-direction: column;
        align-items: start;
        line-height: .8rem;
    }
    header .menu>a,
    header .menu>span {
        display: none;
    }
    header .menu {
        position: fixed;
        top: 0;
        right: 0;
        padding-right: calc(20px + .3rem);
        font-size: .32rem;
        height:0.8rem;
        background-color: #0f0850;
    }
    header .menu .enter {
        display: block;
        order: -1;
        margin: 0 .3rem 0 -.6rem;
        width: 2.4rem !important;
        padding: 0;
        line-height: 1.2rem;
        text-align: center;
        border-radius: 0;
        text-indent: 0!important;
    }
    header .menu.show_menu::after {
        position: absolute;
        top: .4rem;
        right: .3rem;
        content: "";
        margin-top: -10px;
        width: 20px;
        height: 14px;
        border-top: 2px solid #fff;
        background: linear-gradient(transparent 6px,#fff 6.1px,#fff 8px,transparent 8.1px,transparent);
        border-bottom: 2px solid #fff;
    }
    header .menu.active::after {
        border: none;
        content: "×";
        font-size: 34px;
        line-height: 1;
        margin-top: -17px;
        height: auto;
        width: auto;
        font-weight: 400;
        background: transparent;
    }
    header .menu.active {
        height: 100vh;
    }
    header .menu.active>a,
    header .menu.active>span {
        margin-right: calc(-20px - .3rem);
        padding: 0;
        display: block;
        width: 2.8rem;
        text-indent: .4rem;
        font-size:0.3rem;
    }
    header .menu .drop {
        line-height: inherit;
    }
    header .menu .drop::after {
        display: none;
    }
    header .menu .drop::before {
        display: inline-block;
        content: "";
        width: 5px;
        height: 5px;
        vertical-align: middle;
        margin: 0 5px 0 -10px;
        transform: rotate(45deg);
        border-bottom: 1px solid #999;
        border-left: 1px solid #999;
    }
    
    header .menu .drop .item {
        left: 0;
        transform: translateX(100vw);
    }
    header .menu .drop.active .item {
        position: fixed;
        top: 1.2rem;
        right: 2.8rem;
        left: auto;
        height: 100vh;
        width: calc(100vw - 4.2rem);
        line-height: inherit;
        transform: translateX(0);
        background-color: inherit;
    }
    header .menu .drop .item>a {
        padding: 0;
    }
    header .menu .top_back_btn {        
        display: block;
        order: -1;
        margin: 0 .3rem 0 -.6rem;
        width: 1.7rem !important;
        padding: 0;
        line-height: 0.8rem;
        text-align: center;
        border-radius: 0;
        text-indent: 0!important;
        color: #fff;
        font-size: 0.24rem;
        line-height: 0.8rem!important;
    }
}