.tpxx {
    width: 100%;
    margin: auto;
 
}

.tpxx .tpxx_lb {
    position: relative;
    width: 100%;
    height:19vw;
}


.tpxx .tpxx_lb img {
    width: 100%;
   height:100%;
    position: absolute;
    top: 0;
    left: 0;
    transition: all 0.4s;
    -webkit-transition: all 0.4s ease;
    -moz-transition: all 0.4s ease;
    -ms-transition: all 0.4s ease;
    -o-transition: all 0.4s ease;
    transition: all 0.4s ease;
}

.tpxx .slick-prev,
.tpxx .slick-next {
    width: 30px;
    height: 50px;
    position: absolute;
    z-index: 5;
    background-image: none;
    background: none;
    top: 50%;
    margin-top: -32px;
    border-style: none;
    outline: medium;
    text-indent: -999em;
    ;
    background-repeat: no-repeat;
}

.tpxx:hover .slick-prev {
    left: 0px;
    background: url(../images/tpxw_prev.png);
}

.tpxx:hover .slick-next {
    right: 0px;
    background: url(../images/tpxw_next.png);
}