.hd-bg{
    width: 100vw;
    height: 55vh;
    position: relative;
    object-fit: fill;
}
.content img,
.hd-bg img{
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.hd-bg-title{
    width: 80%;
    text-align: center;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translateX(-50%);
    font-size: 3rem;
    color: white;
    font-family: SourceHanSansCN-Bold, SourceHanSansCN;
}
.content{
    width: 75%;
    margin: 0 auto;
    position: relative;
}
.content-paragraph{
    margin: 5% 0;
}
.content{
    font-family: SourceHanSansCN-Regular, SourceHanSansCN;
    color: #333333;
}
.t1{
    font-size: 2.25rem;
    text-align: center;
}
.t2{
    font-size: 1.125rem;
}
.EB{
    height: 50vh;
    padding: 5% 0;
    position: relative;
}
.EB-mobile{
    padding: 5% 0;
    position: relative;
    display: none;
}
.EB-img{
    width: 70%;
    height: 100%;
    margin-left: -17%;
    display: inline-block;
    background-image: url(/images/banner1.png);
    background-size: 100% 100%;
    transition: all 0.5s;
}
.EB-select-box{
    width: 40%;
    padding-left: 5%;
    display: inline-block;
    vertical-align: top;
}
.select-btn{
    width: 60%;
    height: 30%;
    position: absolute;
    right: 0;
    bottom: 17%;
}
.select-btn-item{
    float: left;
    width: 50%;
    height: 100%;
    background-color: white;
    color: #666;
    border-radius: 10px;
    box-shadow: 0px 4px 10px 0px rgba(0, 0, 0, 0.15);
    text-align: center;
    cursor: pointer;
    position: relative;
    transition: all 0.5s;
}
.select-btn-item .position{
    text-align: center;
    font-size: 1rem;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}
.EB-icon{
    width: 3rem;
    height: 3rem;
    display: inline-block;
    margin-bottom: .625rem;
    font-size: 20px;
}
.select-btn-item-ac{
    background-color: #004297;
    color: white;
}
@media screen and (max-width: 750px){
    .hd-bg{
        height: 30vh;
    }
    .hd-bg-title{
        font-size: 2rem;
    }
    .content{
        width: 100%;
        margin: auto;
    }
    .content-paragraph{
        width: 85%;
        margin: 20px auto;
    }
    .EB{
        display: none;
    }
    .EB-mobile{
        width: 100%;
        display: block;
        margin-top: 100px;
    }
    .EB-img{
        width: 100%;
        height: 180px;
        margin: auto;
        position: relative;
    }
    .select-btn{
        width: 100%;
        height: 80px;
        right: initial;
        top: -80px;
        display: flex;
        justify-content: center;
    }
    .select-btn-item{
        width: 120px;
        height: 80px;
        border-bottom-left-radius: 0;
        border-bottom-right-radius: 0;
    }
    .select-btn-item .position{
        width: 100%;
    }
}