.banner {
    width: 100%;
    background: url(../img/guarantee_banner.png) no-repeat center;
    background-size: 100% 500px;
    height: 500px;
    padding-top: 90px;
    box-sizing: border-box;
}

.guarantee {
    width: 925px;
    margin: 0 auto;
}

.guarantee .hr {
    margin: 33px auto;
}

.guarantee div img {
    margin: 0 auto;
    border: 1px solid #efefef;
    box-shadow: 0px 5px 5px #efefef;
}

.guarantee:nth-child(6) {
    margin-bottom: 50px;
}