* {
    margin: 0;
    padding: 0;
}

ul {
    margin-left: 2rem;
}

img {
    width: 100%;
}

.bannerimg {
    margin-top: 80px;
}

.jumpTop {
    cursor: pointer;
    width: 3rem;
    height: 3rem;
    text-align: center;
    line-height: 3rem;
    position: fixed;
    right: 6rem;
    bottom: 6rem;
    background-color: #fff;
    display: none;
    border-radius: 50%;
    text-decoration: none;
    z-index: 99999;
    box-shadow: 0 1px 8px rgba(0, 0, 0, .2);

}

.jumpTop:hover {
    background-color: #ffe540;
    -webkit-transition: All 0.6s ease-in-out;
    -moz-transition: All 0.6s ease-in-out;
    -o-transition: All 0.6s ease-in-out;
}

.jumpTop:hover .topIco {
    color: #fff;
    -webkit-transition: All 0.6s ease-in-out;
    -moz-transition: All 0.6s ease-in-out;
    -o-transition: All 0.6s ease-in-out;
}