* {
    margin: 0;
    padding: 0;
}

ul,
li {
    list-style: none;
}

a {
    text-decoration: none;
}

body {
    font-size: 16px;
    font-family: "Microsoft Yahei";
    color: #333333;
}

img {
    display: block;
    max-width: 100%;
}

.top{
    width: 100%;
    height: auto;
}

.main {
    position: relative;
    width: 100%;
    height: 100vh;
    box-sizing: border-box;
    overflow: hidden;
    background: url(../images/bg.jpg) no-repeat;
    background-size: 100%;
    padding: 10px;
}

.nav {
    width: 100%;
    height: 2rem;
    line-height: 2rem;
    font-size: 1rem;
    color: #ffffff;
    margin-bottom: 10px;
}

.nav ul li {
    width: 30%;
    margin-right: 1.5%;
    margin-left: 1.5%;
    height: 2rem;
    float: left;
    background: #186985;
    text-align: center;
}

.nav ul li.on {
    background: #6bb145;
    color: #ffffff;
}

.nav a {
    display: block;
    width: 30%;
    margin-right: 1.5%;
    margin-left: 1.5%;
    height: 2rem;
    float: left;
    background: #186985;
    display: block;
    text-align: center;
    color: #ffffff;
}

.main-news {
    width: 100%;
    height: calc(100vh - 78px);
    overflow-y:auto;
    display: none;
}

.show {
    display: block;
}

.news-li {
    width: 100%;
    height: auto;
    overflow: hidden;
    padding: 10px 0;
    border-bottom: 1px solid #64ab4a;
}

.news-li img {
    float: left;
    width: 35%;
}

.news-li .content {
    width: 63%;
    float: right;
}

.extra {
    width: 100%;
    height: auto;
    overflow: hidden;
    font-size: 0.875rem;
    margin-top: 10px;
    color: #999999;
}

.extra span.name {
    width: 40%;
    float: left;
    display: block;
}

.extra span.time {
    width: 30%;
    float: right;
    text-align: right;
}

.extra span.tag {
    width: 20%;
    float: right;
    text-align: center;
    background: #64ab4a;
    color: #ffffff;
    margin-left: 5px;
}

.main-news ul li {
    float: left;
    width: 50%;
    box-sizing: border-box;
    padding: 0 10px;
    margin-bottom: 10px;
    text-align: center;
}

.main-news ul li a {
    display: block;
    color: #333333;
}

.main-news ul li a p {
    width: 100%;
    height: auto;
    overflow: hidden;
    line-height: 1.5rem;
    font-size: 0.875rem;
}

.back_top {
    position: fixed;
    bottom: 151px;
    right: 30px;
    z-index: 20;
    width: 40px;
    height: 40px;
    font-size: 0;
    background: url(../images/top.png); no-repeat;
    background-size: cover;
    display: none;
}

.show-top{
	display: block;
}