body {
    margin: 0;
    color: #383838;
    font-family: PingHei, Microsoft Yahei;
    max-width: 700px;
    margin: 0 auto;
}
.banner img {
    display: block;
    width: 100%;
}
a {
    text-decoration: none;
    color: inherit;
}
h1,
h2,
h3,
h4 {
    margin: 0;
    padding: 0;
    font-weight: normal;
    font-size: 16px;
    color: #383838;
}
article {
    text-align: center;
    padding: 0 15px;
    font-size: 12px;
}
article > div {
    text-align: left;
    margin-bottom: 6px;
}
article ol {
    margin: 0;
    padding: 0 0 6px 14px;
    text-align: left;
}
article ol li {
    margin-bottom: 3px;
}
h1 {
    font-size: 18px;
    display: block;
    text-align: center;
    margin: 20px 0 0;
}
h2 {
    display: inline-block;
    padding: 0 7px;
    margin: 16px 0;
    height: 27px;
    line-height: 27px;
    border-radius: 3px;
    background-color: #fb4748;
    color: white;
    font-size: 12px;
}
h1 + h2 {
    margin-top: 6px;
}
.bottom {
    border-top: #f1f1f1 solid 1px;
    margin: 40px 15px 55px;
    padding: 38px 0;
    text-align: center;
    font-size: 18px;
}
.bottom h3 {
    font-size: 25px;
    font-weight: bold;
}
.bottom div {
    color: #909090;
    font-size: 12px;
    margin-top: 8px;
}
nav {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 45px;
    line-height: 45px;
    font-size: 12px;
    border-top: #e5e5e5 solid 1px;
    background-color: white;
    color: #3c3c3c;
    overflow-x: auto;
    white-space: nowrap;
}
nav a {
    display: inline-block;
    margin: 0 10px;
}
nav a:first-child {
    margin-left: 20px;
}
nav a:last-child {
    margin-right: 20px;
}
nav a.active {
    position: relative;
    color: #fb4748;
}
nav a.active:after {
    position: absolute;
    content: "";
    display: inline-block;
    width: 100%;
    height: 2px;
    left: 0;
    bottom: 10px;
    background-color: #fb4748;
}