.background {
    position: relative;
}
img {
    display: block;
}
.nav-container {
    position: absolute;
    width: 100%;
    left: 0;
    top: 0;
    height: 72px;
    border-bottom: 1px solid #73869a;
}

.nav-container .nav-ban {
    position: relative;
    width: 1100px;
    margin: 0 auto;
}

.nav-ban .login-con {
    position: absolute;
    top: 50%;
    left: 0;
    margin-top: 21px;
    width: 136px;
    height: 43px;
    padding: 0;
    float: left;
}

.header-buttons a {
    color: blue;
}

.free-reg {
    position: absolute;
    left: 0;
    top: 0;
    margin-top: 10%;
    text-align: center;
    width: 100%;
    font-size: 50px;
    color: #fff;
}
.free-con {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -100%);
    width: 940px;
    
    /* padding: 82px 0; */
    /* height: 274px; */
    background: #e0e3e5;
    margin: 0 auto;
    text-align: center;
}
.free-con p {
    padding: 26px 0;
    font-size: 30px;
}
.free-assort {
    padding: 0 32px 32px;
    display: flex;
    justify-content: space-between;
}
.assort {
    background: #fff;
    width: 420px;
    height: 164px;
    /* float: left; */
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.assort-xu {
    background: #0085cb;
}
.free-shi {
    padding: 0 32px 32px; 
    display: flex;
    justify-content: space-between;
}
.assort-kua {
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.assort-kua a{
    display: block;
    color: #fff;
    background: #0085cb;
    margin: 20px 90px;
    border-radius: 20px;
    font-size: 14px;
    padding: 10px 0;
}