@media (max-width: 768px) {
    .banner {
        height: 150px;
        /* background-image: url("../images/bannerMB.jpg"); */
    }
    .banner .bannerContent {
        width: 100%;
        padding: 0 15px;
    }
    .bannerTitle {
        font-size: 24px;
        line-height: 30px;
        max-width: 100%;
    }
    .bannerDesc {
        font-size: 12px;
        line-height: 18px;
        margin-bottom: 16px;
    }
}
.body {
    width: 100%;
    max-width: 1200px;
    margin:0 auto 0;
}
.body .title {
    font-size : 26px ;
    color : #252B3A ;
    text-align : center ;
    line-height : 30px ;
    padding: 24px 0 24px;
    width: 100%;
    text-align: center;
    margin-top: 32px;
    font-weight: bold;
}
.body .big-box {
    width: 100%;
    display: flex;
    justify-content: space-between;
}
.body .left-box {
    width: calc((100% - 32px) / 3);
    height: 432px;
    box-shadow : 0 1px 4px 0 rgba(128,132,145,0.30) ;
}
.body .left-box:hover {
    box-shadow: 0 6px 12px 0 rgba(0, 0, 0, 0.10);
}
.body .left-box-img {
    background: url("../images/进入论坛背景图.png") center center;
    background-size: cover;
    height: 208px;
    margin-bottom: 45px;
}
.body .left-box-des {
    font-size : 20px ;
    color : #212121 ;
    text-align : center ;
    line-height : 32px ;
}
.body .btn-line {
    text-align : center ;
}
.btnPrimary {
    display: inline-block;
    padding: 10px 32px;
    background : #C7000B ;
    border-radius : 2px ;
    font-size : 14px ;
    color : #FFFFFF ;
    margin-top: 30px;
}
.body .right-box {
    width: calc(100% - ((100% - 32px) / 3) - 16px);
    height: 432px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
}
.body .little-box {
    width: calc((100% - 16px) / 2);
    height: 208px;
    box-shadow : 0 1px 4px 0 rgba(128,132,145,0.30) ;
    background-color: #fff;
}
.body .little-box:hover {
    box-shadow: 0 6px 12px 0 rgba(0, 0, 0, 0.10);
}
.body .little-box:nth-child(3) {
    margin-top: 16px;
}
.body .little-box:nth-child(4) {
    margin-top: 16px;
}
.body .little-box .little-box-des{
    display: inline-block;
    width: 100%;
    height: 68px;
    line-height: 68px;
    font-size : 20px ;
    color : #252B3A ;
    text-align : center ;
}
.body .little-box .little-box-des:hover{
    color : #C7000B ;
}
.body .little-box:nth-child(1) .little-box-img{
    background: url("../images/problem.png") center center;
    background-size: cover;
    height: 140px;
}
.body .little-box:nth-child(2) .little-box-img{
    background: url("../images/01_1.png") center center;
    background-size: cover;
    height: 140px;
}
.body .little-box:nth-child(3) .little-box-img{
    background: url("../images/01_2.png") center center;
    background-size: cover;
    height: 140px;
}
.body .little-box:nth-child(4) .little-box-img{
    background: url("../images/01_3.png") center center;
    background-size: cover;
    height: 140px;
}

.phoneToUs {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-top: 56px;
}
.phoneToUs .message {
    display: flex;
    align-items: center;
    margin-bottom: 64px;
}
.phoneToUs .message .email {
    display: inline-block;
    width: 35px;
    height: 24px;
    background: url("../images/邮件icon.svg") no-repeat center;
    background-size: contain;
    vertical-align: middle;
}
.phoneToUs .message .address {
    margin-left: 24px;
    font-size : 24px ;
    color : #526ECC ;
    text-align : center ;
    line-height : 30px ;
}


@media (max-width: 768px) {
    body {
        background-color: #f8f8f8;
    }
    .body {
        padding: 0 15px;
        box-sizing: border-box;
    }
    .body .title {
        font-size: 18px;
        line-height: 22px;
        text-align: center;
        margin: 0;
        padding: 15px 0 12px;
        font-weight: bold;
    }
    .body .left-box {
        width: 100%;
        height: 120px;
        position: relative;
    }
    .body .left-box-img {
        width: 100%;
        height: 120px;
        margin-bottom: 0;
    }
    .body .left-box-des {
        font-size : 14px ;
        text-align : right ;
        line-height : 20px ;
        position: absolute;
        right: 20px;
        top: 24px;
    }
    .body .left-box-des2 {
        top: 48px;
    }
    .body .btn-line {
        position: absolute;
        right: 20px;
        top: 72px;
    }
    .btnPrimary {
        padding: 0px;
        margin-top: 0px;
        width: 96px;
        height: 32px;
        line-height: 32px;
        font-size: 12px;
    }
    .body .right-box {
        width: 100%;
        height: auto;
    }
    .body .little-box {
        height: 140px;
        margin-top: 5px;
    }
    .body .little-box .little-box-des{
        font-size: 14px;
        height: 40px;
        line-height: 40px;
    }
    .body .little-box:nth-child(n+2) {
        margin-top: 5px;
    }
    .body .little-box:nth-child(n) .little-box-img{
        height: 100px;
    }

    .phoneToUs {
        background-color: #fff;
        padding: 18px 0;
        margin: 15px 0 20px;
    }
    .phoneToUs .message {
        margin-bottom: 0;
    }
    .phoneToUs .message .email {
        width: 22px;
        height: 15px;
    }
    .phoneToUs .message .address {
        margin-left: 20px;
        font-size: 14px;
        line-height: 20px;
    }
}