* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
a {
    text-decoration: none;
    color: #222;
}
ul,ol,li {
    list-style: none;
}
.clearfix::after {
    content: '';
    display: block;
    clear: both;
}
body {
    font-family: "Microsoft YaHei",Arial,Helvetica,sans-serif;
    font-size: 12px;
}
/*页面主体*/
.main-page{
    width: 980px;
    min-height: 1900px;
    margin: 0 auto;
    position: relative;
}
/*顶部*/
.header{
    position: relative;
    min-width: 980px;
}
.nav-top {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 42px;
    font-size: 13px;
    z-index: 999;
    background-color: rgba(0, 0, 0, 0.2)
}
.nav-ct {
    width: 980px;
    margin: 0 auto;
}
.nav-ct .top-link {
    color: #fff;
    padding: 0 12px;
    display: inline-block;
}
.nav-ct ul > li {
    line-height: 42px;
}
.menu-nav {
    float:left;
}
.menu-nav > ul >li {
    float: left;
    transition: 0.3s background-color;
}
.menu-nav > ul >li:hover{
    background: rgba(255, 255, 255, 0.24);
}
.menu-nav > ul > li:nth-child(1) {
    background-image: url(../images/icons.png);
    background-repeat: no-repeat;
    background-position: -910px -74px;
}
.menu-nav > ul > li:nth-child(1) > .top-link {
    padding-left: 32px;
}
.user-nav {
    float: right;
}
.user-nav > ul > .item {
    float: left;
    transition: 0.3s background-color;
}
.user-nav > ul > .item:not(.contribute):hover{
    background: rgba(255, 255, 255, 0.24);
}
.user-nav > ul >.contribute{
    background-image: url(../images/header/contribute.png);
    background-position: center center;
    height: 48px;
    width: 58px;
    border-radius: 0 0 5px 5px;
    text-align: center;
}
.user-nav > ul >.contribute:hover{
    opacity: 0.9;
    transition: 0.3s
}
.user-nav > ul >.contribute >.top-link{
    padding: 0;
}
.nav-img {
    background-image: url('../images/header/nav-img.png');
    height: 170px;
    background-position: center -10px;
    background-repeat: no-repeat;
}
.nav-img > .img-content {
    position: relative;
    width: 980px;
    height: 170px;
    margin: 0 auto;
}
.img-content > .top-logo {
    position: absolute;
    left: 24px;
    top: 55px;
}
.img-content > .extra {
    position: absolute;
    bottom: 16px;
    right: 0;
    width: 340px;
    font-size: 12px;
}
.img-content >.extra > .rank {
    display: inline-block;
    width: 68px;
    height: 32px;
    padding: 0 2px;
    text-align: center;
    line-height: 32px;
    border-radius: 4px;
    background-color: rgba(255,255,255,0.88);
}
.img-content >.extra > .rank:hover{
    background-color: #fff;
    transition: all .2s;
}
.img-content >.extra > .rank > span {
    padding-left: 20px;
    background: url(../images/icons.png) -664px -663px no-repeat;
    color: #f25d8e;
}
.img-content >.extra > .search {
    position: relative;
    display: inline-block;
    line-height: 32px;
    height: 32px;
    width: 268px;
    background-color: rgba(255,255,255,0.88);
    border-radius: 4px;
}
.img-content >.extra > .search:hover{
    background-color: #fff;
    transition: all .2s;
}
.img-content >.extra > .search > form > input {
    font-size: 12px;
    width: 200px;
    line-height: 32px;
    height: 32px;
    overflow: hidden;
    padding: 0 12px;
    background-color: transparent;
    border: none;
    outline: none;
}
.img-content >.extra > .search > form > button {
    position: absolute;
    right: 0;
    width: 48px;
    height: 32px;
    cursor: pointer;
    border: none;
    background: url(../images/icons.png) -653px -720px;
}
/*分区导航*/
.nav-guide > .guide-wrapper {
    position: relative;
    width: 980px;
    margin: 0 auto;
    padding: 6px 0;
}
.nav-guide > .guide-wrapper > ul {
    display: inline-block;
    height: 50px;
}
.nav-guide > .guide-wrapper > ul > li {
    float: left;
    display: block;
    position: relative;
    font-size: 14px;
    height: 50px;
}
/*二级菜单*/
.nav-guide > .guide-wrapper > ul > li >ul{
    display: none;
    flex-direction: column;
    justify-content: space-between;
    position: absolute;
    z-index: 999;
    left: 0;
    overflow: hidden;
    top: 48px;
    background: #fff;
    border-radius: 0 0 4px 4px;
    box-shadow: 0 2px 4px rgba(0,0,0,.16);

}
.nav-guide > .guide-wrapper > ul > li >ul >li{
    font-size: 12px;
    line-height: 20px;
    min-width: 125px;
    line-height: 20px;
    height: auto;
    overflow: hidden;
    text-align: left;
    transition: all .2s;
    white-space: nowrap;
}
.nav-guide > .guide-wrapper > ul > li >ul >li:hover{
    background-color: #e5e9ef;
    padding-left: 3px;
    transition: all .2s;
}
.nav-guide > .guide-wrapper > ul > li >ul >li >a{
    display: block;
    padding: 5px 15px 5px 5px;
    margin-right: 10px;
}
.nav-guide > .guide-wrapper > ul > li >ul >li >a >.icon{
    background-image: url(../images/icons2.png);
    background-position: 9px -1615px;
    display: inline-block;
    width: 18px;
    height: 18px;
}
.nav-guide > .guide-wrapper > ul > li >a {
    position: relative;
    font-size: 14px;
    color: #222;
    display: block;
}
.nav-guide > .guide-wrapper > ul > li:nth-child(1) >a {
    background: url(../images/icons.png) -658px -1170px no-repeat;
}
.nav-guide > .guide-wrapper > ul > li > a > span {
    display: inline-block;
    line-height: 50px;
    height: 40px;
    margin: 0 10px;
    padding-top: 8px;
}
.nav-guide > .guide-wrapper > ul > li:nth-child(1) > a > span{
    margin-left: 0;
}
.nav-guide > .guide-wrapper > ul > li > a >.num {
    position: absolute;
    text-align: center;
    top: 8px;
    left: 0;
    height: 14px;
    width: 100%;
}
.nav-guide > .guide-wrapper > ul > li > a >.num > span {
    display: inline-block;
    background-color: #ffafc9;
    color: #fff;
    padding: 1px 3px;
    font-size: 11px;
    height: 14px;
    line-height: 12px;
    vertical-align: top;
    min-width: 18px;
    border-radius: 4px;
    text-align: center;
}
.nav-guide > .guide-wrapper > ul > .square {
    margin: 0 10px;
}
.nav-guide > .guide-wrapper > ul > .square > a >span {
    padding: 0 0 0 22px;
    height: 50px;
    margin: 0!important;
    font-size: 16px;
    line-height: 50px;
}
.nav-guide > .guide-wrapper > ul > .square > a > .square-1 {
    background: url(../images/icons.png) -727px -519px no-repeat;
}
.nav-guide > .guide-wrapper > ul > .square > a > .square-2 {
    background: url(../images/icons.png) -664px -518px no-repeat;
}
.nav-guide > .guide-wrapper > ul > .square > a > .square-3:before {
    position: absolute;
    background: url(../images/icons.png) -727px -519px no-repeat;
    display: inline-block;
    width: 22px;
    height: 50px;
    left: 0;
    content: ' ';
}
.nav-guide > .guide-wrapper >a {
    display: inline-block;
    position: absolute;
    right: 0;
    top: 0;
    height: 50px;
    padding: 6px 0;
}
/*页面主体*/
.main-page{
    width: 980px;
    margin:0 auto;
}