html,
body {
    width: 100%;
    font-size: 62.5%;
    max-width: 640px;
    margin: 0 auto;
}

.mainWrp {
    max-width: 640px;
    margin: 0 auto;
}

.fl {
    float: left;
}

.fr {
    float: right;
}

.hide {
    display: none;
}

.show {
    display: block;
}

.clear::after {
    content: "";
    display: block;
    width: 100%;
    height: 0;
    visibility: hidden;
    clear: both;
}

.backIcn {
    position: fixed;
    z-index: 9;
    border-radius: 50%;
    top: 8px;
    margin-left: 8px;
    display: block;
    height: 37px;
    width: 37px;
    background-color: rgba(246, 166, 35, .7);
    background-image: url(../img/backicon.png);
    background-repeat: no-repeat;
    background-position: 50% 50%;
    background-size: 30% auto;
}

.botNavas {
    max-width: 640px;
    margin: 0 auto;
    background-color: #fff;
    position: fixed;
    bottom: 0;
    width: 100%;
    z-index: 17;
}

.botNavas a {
    display: block;
    float: left;
    padding-bottom: 6px;
    width: 25%;
    text-align: center;
}

.botNavas a span {
    display: block;
    margin: 0 auto;
    max-width: 60px;
    width: 50%;
    height: 37px;
    background-repeat: no-repeat;
    background-position: 50% 6px;
    background-size: auto 80%;
}

.botNavas a:nth-child(1) span {
    background-image: url(../img/botnav01.png)
}

.botNavas a:nth-child(2) span {
    background-image: url(../img/botnav02.png)
}

.botNavas a:nth-child(3) span {
    background-image: url(../img/botnav03.png)
}

.botNavas a:nth-child(4) span {
    background-image: url(../img/botnav04.png)
}

.botNavas a:nth-child(5) span {
    background-image: url(../img/botnav05.png)
}

.botNavas a.on:nth-child(1) span {
    background-image: url(../img/botnav01on.png);
    height: 53px;
    width: 100%;
    background-size: auto 92%;
}

.botNavas a.on:nth-child(1) p {
    display: none
}

.botNavas a.on:nth-child(2) span {
    background-image: url(../img/botnav02on.png)
}

.botNavas a.on:nth-child(3) span {
    background-image: url(../img/botnav03on.png)
}

.botNavas a.on:nth-child(4) span {
    background-image: url(../img/botnav04on.png)
}

.botNavas a.on:nth-child(5) span {
    background-image: url(../img/botnav05on.png)
}

.botNavas a p {
    font-size: 10px;
    line-height: 16px;
    color: #000000;
}