.container{
    width: 100%;
}
.container .header {
    height: 80px;
    line-height: 80px;
    background-color: #fff;
    box-shadow: 0px 2px 4px 0px rgba(0, 0, 0, 0.1);
    position: fixed;
    left: 0;
    top: 0px;
    z-index: 9999;
    width: 100%;
}
.container .mt{
    top: 40px;
}
.container .header .header-wrap {
    width: 1200px;
    height: 100%;
    margin: 0 auto;
    display: flex;
    align-items: center;
}

.container .header .header-wrap .logo {
    width: 106px;
    height: auto;
}

.container .header .header-wrap .nav {
    margin-left: 30px;
    display: flex;
    align-items: center;
}

.container .header .header-wrap .nav .nav-item {
    margin: 0 10px;
    font-size: 18px;
    font-family: Source Han Sans SC-Regular, Source Han Sans SC;
    font-weight: 400;
    color: #000000;
    line-height: 27px;
    transition: 2s;
}

.container .header .header-wrap .nav .nav-item a {
    color: #000;
    font-size: 16px;
}

.container .header .header-wrap .nav .nav-item>a:hover {
    padding-bottom: 20px;
    color: #1363FF;
}
.container .header .header-wrap .nav .nav-active>a{
    padding-bottom: 20px;
    color: #1363FF;
    border-bottom: 2px solid #1363FF;
}
.container .header .header-wrap .nav .activity:hover .nav-box {
    height: 480px;
}

.container .header .header-wrap .nav .nav-box .activity_l {
    width: 23.43%;
    height: 100%;
    background: #FFFFFF;
    padding-bottom: 60px;
}

.container .header .header-wrap .nav .nav-box .activity_l .list {
    display: flex;
    flex-direction: column;
}

.container .header .header-wrap .nav .nav-box .activity_l .list .ul {
    font-weight: 400;
    font-size: 18px;
    line-height: 72px;
    padding-left: 57.8%;
    color: #333333;
}

.container .header .header-wrap .nav .nav-box .activity_l .list .ul:hover {
    font-weight: 500;
    color: #0049cc;
    background: #ffffff;
}
.container .header .header-wrap .nav .nav-box .activity_r {
    width: calc(100% - 23.43%);
    background: #ffffff;
    padding: 50px 11.98% 60px 4.72%;
    display: flex;
    overflow-y: auto;
}

.container .header .header-wrap .nav .nav-box .activity_r .activity_box {
    margin: 0 30px;
    width: 25.23%;
    margin-bottom: 30px;
}

.container .header .header-wrap .nav .nav-box .activity_r .activity_box .p_title {
    font-size: 18px;
    color: #0049cc;
    padding-bottom: 18px;
    border-bottom: 1px solid #e5e5e5;
}

.container .header .header-wrap .nav .nav-box .activity_r .activity_box .p_ul .p_img {
    width: 58px;
    height: 48px;
    border-radius: 5px;
    background: #f5f6fa;
    margin-right: 20px;
}

.container .header .header-wrap .nav .nav-box .activity_r .activity_box .p_ul .p_img img {
    max-width: 100%;
    max-height: 100%;
    vertical-align: middle;
}

.container .header .header-wrap .nav .nav-box .activity_r .activity_box .p_ul a {
    margin-top: 36px;
    display: flex;
    align-items: center;
}

.container .header .header-wrap .nav .nav-box .activity_r .activity_box .p_word .name {
    font-size: 18px;
    color: #333;
    font-weight: 600;
    line-height: 27px;
}

.container .header .header-wrap .nav .nav-box .activity_r .activity_box .p_word .brief {
    font-size: 16px;
    color: #333;
    font-weight: 400;
    line-height: 26px;
}

.container .header .header-wrap .nav .nav-box {
    width: 100%;
    height: 0px;
    background-color: #FFFFFF;
    position: absolute;
    left: 0;
    top: 80px;
    z-index: 999;
    transition: 0.3s;
    overflow: hidden;
    display: flex;
}

.container .header .header-wrap .btn {
    display: flex;
    align-items: center;
    position: absolute;
    right: 50px;
    top: 20px;
}

.container .header .header-wrap .btn .login {
    cursor: pointer;
    width: 98px;
    height: 42px;
    line-height: 42px;
    text-align: center;
    border: 1px solid #1363FF;
}

.container .header .header-wrap .btn .free {
    cursor: pointer;
    margin-left: 20px;
    color: #fff;
    width: 98px;
    height: 42px;
    line-height: 42px;
    text-align: center;
    background-color: #1363FF;
}

.container .header .header-wrap .logo img {
    width: 100%;
    height: 100%;
}