html {
    height: 100%;
    font-size: 14px;
}

body {
    font-family: "Microsoft Yahei";
    font-size: 14px;
    background-color: #fff;
    margin: 0;
}

a {
    color: #337ab7;
    text-decoration: none;
    background-color: transparent;
}

* {
    box-sizing: border-box;
}

.container-fluid {
    margin: 0 auto;
}

.top {
    background-color: #fff;
    height: 80px;
    width: 100%;
    position: fixed;
    top: 0px;
    left: 0px;
    z-index: 1000;
}

.logo { 
    background-image: url('../images/logo.png');
    background-repeat: no-repeat;
    width: 262px;
    height: 60px;
    margin: 10px;
}
.logo2 { /*float: right; position: absolute; right: 0;*/
    background-image: url('../images/dns_.png');
    background-repeat: no-repeat;
    width: 205px;
    height: 50px;
    margin: 10px;
}

.guideHead {
    margin-top: 80px;
    width: 100%;
}

.guideHead.dns {
    background-color: #CCE6FF;
    width: 100%;
}

.guideHead .image {
    width: 50px;
    height: auto;
    margin: 0 10px
}

.guideHead .title {
    width: 21%;
    font-size: 24px;
    color: #000;
    line-height: 28px;
    display: flex;
    align-items: center;
    white-space: nowrap;
}

.guidHead-content {
    position: relative;
}

.max-center-content {
    max-width: 1024px;
    display: flex;
    align-items: center; justify-content:space-between;
}

.guid-content {
    width: 100%;
    margin: 32px 0px 92px;
    padding: 0px 0px 0px 10px;
    text-align: left;
    position: relative;
}

.tabUl {
    display: flex;
    width: 100%;
    zoom: 1;
    overflow-x: auto;
    white-space: nowrap;
    flex-wrap: wrap;
    gap: 0.5%;
}

/* 去除底部滚动条 */

.tabUl::-webkit-scrollbar {
    display: none;
}

.tabUl li {
    width: calc(100% / 18 - -6%);
    list-style: none;
    margin: 0 0 5px 0;
    display: inline-table;
}

.tabUl li a {
    display: block;
    width: 100%;
}

.main-content .row:nth-child(2n+1) .problemItem {
    margin: 0px 20px 20px;
}

.main-content .row:nth-child(2n) .problemItem {
    margin: 20px 20px 0px;
}

.main-content .row:nth-child(2n+1) .arrow {
    margin-bottom: 40px;
}

.main-content .row:nth-child(2n) .arrow {
    margin-bottom: 20px;
}

.footer {
    /* min-width: 1024px; */
    background-color: #f9f9f9;
    border-top: 1px solid #dedede;
}

.footer.guide {
    /* min-width: 1024px; */
}

.footer-content {
    margin: 20px auto 0px;
    height: 66px;
}

.copyright {
    color: #999;
    text-align: center;
    font-size: 16px;
}

.bottomDiv {
    float: right;
}

.row a:hover,
.row a:focus,
.guideHead a:hover,
.guideHead a:focus {
    text-decoration: none;
}

.guid-content img {
    margin: auto;
    width: 100%;
}

.changeVersionButtonGroup {
    width: 100%;
}

.changeVersionButton {
    width: 100%;
    height: 44px;
    background-color: #3B9AF4;
    color: #fff;
    text-align: center;
    border-radius: 5px;
    margin-left: 1px;
    line-height: 44px;
    font-size: 16px;
}

.changeVersionButton:hover {
    background-color: #fff;
    color: #333;
    font-weight: 400;
}

.tabUl li.on a .changeVersionButton {
    background-color: #fff;
    color: #333;
    font-weight: 700;
}

.tabBox {
    width: 100%;
    max-width: 1024px;
    margin: 20px auto;
    border: 2px solid #CCE6FF;
    border-radius: 20px;
    padding: 5px;
}