.banner_teshu {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
}

.banner_teshu .slide {
    width: 100%;
    min-height: 180px;
    overflow: hidden;
    position: relative;
}

.banner_teshu .slide .img {
    overflow: hidden;
    position: absolute;
    transition: width 0.4s, height 0.4s, top 0.4s, left 0.4s, z-index 0.4s;
}

.banner_teshu .slide .img img {
    width: calc(100% - 14px);
    height: calc(100% - 14px);
    margin: 7px;
}

.banner_teshu .slide .img1 {
    width: 40%;
    height: 40%;
    top: 30%;
    left: -50%;
    z-index: 1;
}

.banner_teshu .slide .img2 {
    width: 60%;
    height: 60%;
    top: 20%;
    left: -20%;
    z-index: 2;
}

.banner_teshu .slide .img3 {
    width: 80%;
    height: 80%;
    top: 10%;
    left: 10%;
    z-index: 3;
}

.banner_teshu .slide .img4 {
    width: 60%;
    height: 60%;
    top: 20%;
    left: 60%;
    z-index: 2;
}

.banner_teshu .slide .img5 {
    width: 40%;
    height: 40%;
    top: 30%;
    left: 110%;
    z-index: 1;
}

.banner_teshu .slide-bt {
    position: absolute;
    left: 50%;
    bottom: 13%;
    z-index: 10;
}

.banner_teshu .slide-bt span {
    width: 24px;
    height: 8px;
    background: #c9caca;
    float: left;
    margin: 5px;
    border-radius: 4px;
}

.banner_teshu .slide .slide-bt .on {
    background: #ffd200;
}

.banner_teshu span {
    position: absolute;
    display: inline-block;
}

.banner_teshu span.prev {
    top: 50%;
    left: 15px;
    width: 23px;
    height: 23px;
    border-right: 5px solid #ececec;
    border-bottom: 5px solid #ececec;
    transform: rotate(130deg);
    z-index: 9999;
  cursor: pointer;
}

.banner_teshu span.next {
    top: 50%;
    right: 21px;
    width: 23px;
    height: 23px;
    border-right: 5px solid #ececec;
    border-bottom: 5px solid #ececec;
    transform: rotate(320deg);
    z-index: 9999;
  cursor: pointer;
}