.guarantee {
    width: 100%;
}

.guarantee ul {
    overflow: hidden;
}

.guarantee ul:nth-child(odd) li:nth-child(1) img {
    opacity: 0;
}

.guarantee ul:nth-child(even) li:nth-child(2) img {
    opacity: 0;
}

.guarantee ul:nth-child(odd) li:nth-child(1) {
    background-image: url(../images/guarantee1.jpg);
    background-position: left;
    background-size: 50% auto;
    background-attachment: fixed;
    background-repeat: no-repeat;
}

.guarantee ul:nth-child(even) li:nth-child(2) {
    background-position: right;
    background-size: 50% auto;
    background-attachment: fixed;
    background-repeat: no-repeat;
}

.guarantee ul:nth-child(2) li:nth-child(2) {
    background-image: url(../images/guarantee4.jpg);
}

.guarantee ul:nth-child(3) li:nth-child(1) {
    background-image: url(../images/guarantee5.jpg);
}

.guarantee ul:nth-child(4) li:nth-child(2) {
    background-image: url(../images/guarantee8.jpg);
}

.guarantee ul:nth-child(5) li:nth-child(1) {
    background-image: url(../images/guarantee9.jpg);
}

.guarantee ul:nth-child(6) li:nth-child(2) {
    background-image: url(../images/guarantee12.jpg);
}

.guarantee ul:nth-child(7) li:nth-child(1) {
    background-image: url(../images/guarantee13.jpg);
}

.guarantee ul li:nth-child(1) {
    width: 50%;
    float: left;
}

.guarantee ul li:nth-child(2) {
    width: 50%;
    float: left;
}

.guarantee ul li:nth-child(1) img {
    width: 100%;
    display: block;
}

.guarantee ul dd img {
    width: 100%;
    display: block;
}