body, button, input, select, textarea,ul,li h1, h2, h3, h4, h5, p {
    margin:0;
    padding:0;
    list-style:none;
}
div{
    display: block;
}
a{
    text-decoration: none;
}
.top{
    width: 100%;
    height: 58px;
    background-color: #00a2ff;
    opacity: 0.65;
    color: #FFFFFF;
    position: fixed;
    z-index: 1000;
}
.item{
    width: 1450px;
    margin: 0 auto;
}
.l{
    float: left;
}
.r{
    float: right;
}
.logo{
    margin-top: 4px;
    margin-right: 100px;
}
.nav{
   display: flex;
}
.nav li{
    text-align: center;
    width: 100px;
    line-height: 50px;
    font-weight: 500;
}
.nav li a{
    color: #fff;
}
.tel{
    margin-left: 20px;
    margin-top: 10px;
}
.tab{
    width: 100%;
    background-color: #f3fbff;
    box-shadow: 1px 2px 5px 1px
    rgba(0, 0, 0, 0.06);
    /*padding-bottom: 10px;*/
    overflow: hidden;

}
.tab .item{
   width: 1450px;
    margin: 5px auto;
}
.tab ul{
    display: flex;
}
.back{
    background-color: #00a0ea;
}
.bs{
    background-color: #FFFFFF;
}
.tab li{
    display: flex;
    width: 467px;
    height: 242px;
    margin-right: 10px;
    align-items:center;
    justify-content:center;

}
.title-box{
    width: 100%;
    height: 195px;
    overflow: hidden;
    background-color: #f3fbff;
}

.banner{
    width: 1920px;
    margin: 0 auto;
    overflow: hidden;
}
.banner img{
    margin:0;
    padding:0;
    list-style:none;
}

.tooltip {
    margin-top:13px;
    margin-left: 150px;
    position: relative;
    display: inline-block;
}

.tooltip .tooltiptext {
    visibility: hidden;
    width: 100px;
    height: 50px;
    text-align: center;
    /* 定位 */
    position: absolute;
    z-index: 1;
    top: 100%;
    left: 50%;
    margin-left: -50px;
}
.tooltiptext a:nth-child(1){
    background-color: #6ae8ff;
    color: #fff;
    display: inline-block;
    width: 100px;
    height: 25px;
    line-height: 25px;
}
.tooltiptext a:nth-child(2){
    background-color: #757575;
    color: #fff;
    display: inline-block;
    width: 100px;
    height: 25px;
    line-height: 25px;
}
.tooltip:hover .tooltiptext {
    visibility: visible;
}