.banner {
    position: relative;
    width: 100%;
    height: 600px;
    background: url(../images/03.jpg) no-repeat center;
    background-size: cover;
}
.banner .abt {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    color: #fff;
    font-size: 48px;
}
.bigbox {
    background: url(../images/xiaqi.jpg) no-repeat center;
    background-size: cover;
}
.bigbox .main {
    box-sizing: border-box;
    width: 1200px;
    margin: 0 auto;
    padding: 0 30px;
    padding-bottom: 90px;
}
.bigbox .main .mbx {
    padding: 50px 0 2.6075vw;
    color: #fff;
    font-size: 14px;
}
.bigbox .main .mbx a {
    color: #fff;
}
.bigbox .main ul {
    float: left;
    margin-top: 89px;
}
.bigbox .main ul li a {
    display: block;
    width: 196px;
    height: 74px;
    font-size: 16px;
    text-align: center;
    line-height: 74px;
}
.bigbox .main ul li .choose {
    background: #2b2b2b;
}
.bigbox .main a:hover {
    background: #2b2b2b;
}
.bigbox .main .line {
    float: left;
    position: relative;
    width: 1px;
    height: 895px;
    background: #6a6a6a;
}
.bigbox .main .line .yuan {
    position: absolute;
    bottom: -11px;
    left: -5px;
    width: 11px;
    height: 11px;
    border-radius: 50%;
    background: #faaa10;
}
.bigbox .main .introduce {
    float: right;
    /* width: 850px; */
    width: 40%;
    margin-top: 89px;
}
.bigbox .main .introduce p {
    color: #fff;
    font-size: 16px;
    line-height: 220%;
    margin-bottom: 16px;
}


@media screen and (max-width: 1199px) {
    .bigbox .main {
        width: 100%;
    }
    .bigbox .main .line {
        height: 79.5vw;
    }
    .bigbox .main .introduce {
        width: 72%;
    }
}
@media screen and (max-width: 991px) {
    .bigbox .main ul li a {
        width: 150px;
        height: 56px;
        line-height: 56px;
    }
    .bigbox .main .introduce {
        width: 75%;
    }
}
@media screen and (max-width: 767px) {
    .banner {
        height: 350px;
    }
    .banner .abt {
        font-size: 30px;
    }
    .bigbox .main {
        padding: 0 15px;
        padding-bottom: 90px;
    }
    .bigbox .main .mbx {
        padding: 5.2083vw 0;
    }
    .bigbox .main ul {
        float: none;
        margin-top: 20px;
        text-align: center;
    }
    .bigbox .main ul li {
        float: left;
        width: calc((100% - 10px) / 2);
    }
    .bigbox .main ul li:nth-of-type(3n+2) {
        margin: 0;
    }
    .bigbox .main ul li:nth-of-type(odd) {
        margin-right: 10px;
    }
    .bigbox .main ul li:nth-of-type(n+3) {
        margin-top: 10px;
    }
    .bigbox .main ul li a {
        box-sizing: border-box;
        border: 1px solid #faaa10;
        width: 100%;
        height: 45px;
        font-size: 14px;
        line-height: 44px;
    }
    .bigbox .main ul li .choose {
        background: #faaa10;
    }
    .bigbox .main .line {
        display: none;
    }
    .bigbox .main .introduce {
        float: none;
        width: 100%;
        margin-top: 6.5189vw;
    }
    .bigbox .main .introduce p {
        font-size: 15px;
        line-height: 180%;
        margin-bottom: 16px;
    }
}
@media screen and (max-width: 425px) {
    .bigbox .main ul li {
        width: calc((100% - 10px) / 2);
    }
    .bigbox .main ul li:nth-of-type(3n+2) {
        margin: 0;
    }
    .bigbox .main ul li:nth-of-type(odd) {
        margin-right: 10px;
    }
    .bigbox .main ul li:nth-of-type(n+3) {
        margin-top: 10px;
    }
}