.banner-box{
    width: 100%;
    height: 413px;
    background: url('/jingtai/images/tzz_02.jpg') center/cover no-repeat; 
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}
.banner-box p:nth-child(1){
    font-size: 36px;
	font-weight: bold;
	color: #ffffff;
}
.banner-box p:nth-child(2){
    font-size: 14px;
    color: #ffffff;
    line-height: 30px;
}
ul.nav{
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    border-bottom: 1px solid #e2e2e2;
}
ul.nav li a{
    padding: 10px 20px;
    font-size: 14px;
    color: #282828;
    cursor: pointer;
    display: block;
}
ul.nav li.active{
    color: #1f83f2;
    font-weight: bold;
    border-bottom: 1px solid #1f83f2;
}
ul.nav li.active a{
    color: #1f83f2;
}
.tbox{
    width: 100%;
    height: auto;
    text-align: center;
    padding: 20px;
    box-sizing: border-box;
}
.tbox .ul{
    width: 100%;
}
.tbox ul .content{
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 0;
    cursor: pointer;
    border-bottom: 1px solid #eee;
}
.tbox ul li:hover{
    background-color: #f3f8fe;
}
.tbox ul li:hover span{
    color: #1f83f2;
}
.tbox ul li:hover .center p:nth-child(1){
    color: #1f83f2;
}
.tbox ul li:hover img.hov{
    display: block;
}
.tbox ul li:hover img.cg{
    display: none;
}
.tbox ul li .line{
    width: 1px;
    height: 66px;
    background-color: #aaa;
    position: absolute;
    left: 85px;
    top: 20px;
}
.tbox ul li .center{
    width: 80%;
    margin-left: 120px;
    text-align: left;
}
.tbox ul li .center p:nth-child(1){
    font-size: 18px;
	line-height: 40px;
	color: #404040;
}
.tbox ul li .center p:not(:first-child){
    font-size: 12px;
	line-height: 24px;
	color: #9f9f9f;
}
.tbox ul li span{
    position: absolute;
    left: 0;
    top: 20px;
}
.tbox ul li span{
    font-size: 60px;
	font-weight: normal;
	font-stretch: normal;
	line-height: 60px;
	letter-spacing: 0px;
    color: #aaa;
}
.tbox ul li img{
    position: absolute;
    right: 0;
    top: 20px;
}
.tbox ul li img.hov{
    display: none;
}
@media screen and (max-width: 1200px) {
    .tbox ul{
        padding: 0 1%;
    }
    .tbox ul li img{
        right: .5rem;
    }
}
@media screen and (max-width: 992px) {

}
@media screen and (max-width: 750px) {
    .banner-box{
        height: 4.13rem;
    }
    .banner-box p:nth-child(1){
        font-size: .36rem;
    }
    .banner-box p:nth-child(2){
        font-size: .14rem;
        line-height: .3rem;
    }
    ul.nav{
        justify-content: space-around;
    }
    .img-box p:nth-child(1){
        font-size: .36rem;
        font-weight: bold;
        color: #ffffff;
    }
    .img-box p:nth-child(2){
        font-size: .14rem;
        color: #ffffff;
        line-height: .3rem;
    }
    .tbox ul .content{
        padding: .2rem 0;
    }
    .tbox ul li .line{
        width: 1px;
        height: .66rem;
        left: .85rem;
        top: .9rem;
    }
    .tbox ul li .center{
        width: 60%;
        margin-left: 1.2rem;
        text-align: left;
    }
    .tbox ul li .center p:nth-child(1){
        font-size: .18rem;
        line-height: .4rem;
    }
    .tbox ul li .center p:not(:first-child){
        font-size: .12rem;
        line-height: .34rem;
    }
    .tbox ul li span{
        top: .9rem;
    }
    .tbox ul li span{
        font-size: .6rem;
        line-height: .6rem;
    }
    .tbox ul li img{
        top: 50%;
        margin-top: -12.5px;
        width: 25px;
        height: 25px;
    }
    ul.nav li a {
        padding: .2rem 0;
        font-size: .12rem;
    }
}
.tbox iframe{
    width: 794px;
    height: 72px;
    border: 0px;
    margin-top: -26px;
    display: block;
    margin: auto;
}
.tbox .img{
    width: 100%;
    height: 800px;
}
.tbox .color{
    margin-bottom: 10px;
    background-color: rgb(242,242,242);
}
#demo1{
    text-align: center;
}