.adv_box {
    position: fixed;
    top: 80px;
    z-index: 20;
}

.adv_box .adv_close {
    position: absolute;
    top: 0;
    left: 0;
    width: 24px;
    z-index: 20;
}

.adv_box .adv {
    width: 160px;
    display: block;
    transition-property: width;
    -moz-transition-property: width;
    -webkit-transition-property: width;
    -o-transition-property: width;
    transition-duration: .5s;
    -moz-transition-duration: .5s;
    -webkit-transition-duration: .5s;
    -o-transition-duration: .5s;
    transition-timing-function: linear;
    -moz-transition-timing-function: linear;
    -webkit-transition-timing-function: linear;
    -o-transition-timing-function: linear;
    transition-delay: 0;
    -moz-transition-delay: 0;
    -webkit-transition-delay: 0;
    -o-transition-delay: 0;
}

.adv_box .adv.adv_small {
    width: 80px;
}

.adv_box .adv.adv_small {
    width: 80px;
}

.adv_box .adv_tag {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 40px;
    height: 24px;
    background-color: rgba(0,0,0,.6);
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    text-align: center;
    line-height: 24px;
}

.adv_box.left {
    left: 0;
}

.adv_box.right {
    right: 0;
}