body, .width {
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
}

header {
    margin-top: 15%;
}

.intro section {
    padding: 1.5em;
    text-align: right;
}

.intro section:nth-child(even) {
    background-color: #f1f1f1;
    text-align: left;
}

.intro section .icon {
    float: left;
    max-width: 37.5%;
}

.intro section .icon img {
    pointer-events: none;
    max-height: 150px;
}

.intro section:nth-child(1) {
    padding-top: 5%;
    padding-bottom: 5%;
}

.intro section:nth-child(1) .icon img {
    max-height: 115px;
}

.intro section:nth-child(2) {
    padding-top: 7.5%;
    padding-bottom: 7.5%;
}

.intro section:nth-child(2) .icon img {
    max-height: 100px;
}

.intro section:nth-child(4) {
    padding-top: 7.5%;
    padding-bottom: 7.5%;
}

.intro section .text {
    font-size: 16px;
    color: #000000;
    line-height: 1.75;
    padding-top: 2.5%;
    float: right;
    max-width: 60%;
}

.intro section .text h1 {
    font-size: 16px;
}

.intro section .text span {
    color: #f9a727;
}

.intro section .text p {
    margin-top: 5%;
    font-size: 14px;
    color: #666;
}

.intro section:nth-child(even) .icon {
    float: right;
}

.intro section:nth-child(even) .text {
    float: left;
}

footer {
    margin-top: 1%;
    border-top: 1px solid #ccc;
    text-align: center;
    padding: 1em;
}

#zz {
    width: 100%;
    height: 100px;
    position: fixed;
    z-index: 99;
    background: #000;
    filter: alpha(opacity=60);
    filter: progid:DXImageTransform.Microsoft.Alpha(opacity=60);
    -moz-opacity: 0.6;
    -khtml-opacity: 0.6;
    opacity: 0.6;
    display: none;
    left: 0;
    top: 0
}

#baidu_select {
    width: 248px;
    height: 209px;
    background: #fff;
    display: none;
    z-index: 99999;
    position: fixed;
    border-radius: 10px;
    top: 198px;
    left: 75px;
}

#baidu_select h2 {
    width: 248px;
    height: 30px;
    line-height: 30px;
    margin: auto;
    margin-top: 35px;
    font-size: 16px;
    color: #5a5a5a;
    text-align: center;
    font-weight: normal
}

#baidu_select p {
    width: 248px;
    height: 30px;
    line-height: 30px;
    margin: auto;
    font-size: 18px;
    color: #5a5a5a;
    font-weight: bold;
    text-align: center
}

#baidu_select span {
    padding-left: 24px;
    /* background: url(../img/m/baiduTips/safari.png) 0 4px no-repeat; */
    background-size: 20px 20px;
    display: inline-block;
}

#copy_box {
    width: 204px;
    height: 36px;
    line-height: 30px;
    margin: auto;
    border: 3px solid #dcdcdc;
    border-radius: 6px;
    position: relative;
    padding-right: 60px;
}

#copy_box #select_url {
    height: 30px;
    line-height: 30px;
    font-size: 14px;
    color: #5a5a5a;
    border: none;
    background: transparent;
    padding-left: 5px;
}

#copy_box #btn_copy {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 55px;
    height: 30px;
    line-height: 30px;
    background: #448aca;
    color: #fff;
    font-size: 18px;
    text-align: center;
    float: right;
    border-radius: 6px;
}

#jump_closed1 {
    width: 20px;
    height: 20px;
    position: absolute;
    top: 20px;
    right: 20px;
    /* background: url(../img/m/baiduTips/close.png) no-repeat; */
    background-size: 100% 100%;
    z-index: 99999
}

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 10000;
    color: #ffffff;
}

.nav a {
    display: block;
    position: relative;
    width: 100%;
    color: #ffffff;
    background-color: #1583d0;
    padding: 7.5px;
}

.nav img {
    display: block;
    float: left;
    height: 50px;
    margin-right: 7.5px;
}

.nav button {
    float: right;
    background-color: #feb542;
    color: #912500;
    border: none;
    font-size: 18px;
    font-weight: bold;
    letter-spacing: 5px;
    padding: 7.5px 5px 7.5px 10px;
    margin-top: 5px;
    margin-left: 5px;
}

.nav section {
    text-align: left;
    padding-top: 5px;
}

.nav section * {
    max-height: 834462737px;
    -webkit-text-size-adjust: none;
}

.nav section h1 {
    font-size: 18px;
    line-height: 1.15;
}

.nav section p,
.nav section span {
    font-size: 12px;
    line-height: 1.25;
    margin-top: 2.5%;
    text-overflow: ellipsis;
    white-space: nowrap;
    overflow: hidden;
}

@media screen and (max-width: 374px) {
    .nav section h1 {
        font-size: 16px;
    }

    .nav section p,
    .nav section span {
        font-size: 10px;
        letter-spacing: -1px;
    }
}

@media screen and (min-width: 376px) {
    .nav section h1 {
        font-size: 20px;
    }

    .nav section p,
    .nav section span {
        font-size: 13px;
    }
}

@media screen and (min-width: 415px) {
    .nav section h1 {
        font-size: 24px;
    }

    .nav section p,
    .nav section span {
        font-size: 16px;
    }
}

.iosTips {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    z-index: 917917;
    background-color: rgba(0, 0, 0, .5);
}

.iosTips .iosTipsW {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 75%;
    transform: translate(-50%, -50%);
}

.iosTips .iosTipsR {
    position: absolute;
    z-index: 917917917;
    top: 0;
    right: 0;
    transform: translate(60%, -60%);
    width: 35px;
    height: 35px;
}

.iosTips .iosTipsR img {
    display: block;
    width: 100%;
    height: 100%;
}

.iosTips .iosTipsC {
    overflow: hidden;
    position: relative;
    background-color: #ffffff;
    border-radius: .5em;
}

.iosTips h1 {
    color: red;
    text-align: center;
    padding: .5em;
    font-size: 16px;
}

.iosTips a {
    background-color: #49d50c;
    color: #fff;
    display: block;
    line-height: 38px;
    width: 50%;
    text-align: center;
    border-radius: 2em;
    font-size: 15px;
    margin: .5em auto;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.iosTips .swiper-container {
    width: 100%;
}

.iosTips .swiper-slide img {
    display: block;
    width: 100%;
}

.iosTips .swiper-pagination span {
    width: 25px;
    height: 5px;
    border-radius: 5px;
    background-color: #ffe8e8;
}

.iosTips .swiper-pagination span.swiper-pagination-bullet-active {
    background-color: #555555;
}

.toBrowser {
    position: fixed;
    z-index: 9999999;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    overflow: hidden;
    background: rgba(0, 0, 0, 0.75) url(../img/m/toBrowser.png) no-repeat center center;
    background-size: contain;
    display: none;
}