.m {
    width: 1340px;
    margin: 0 auto;
}

.mr10 {
    margin-right: 10px;
}

.mr25 {
    margin-right: 25px;
}

.scrollHide {
    overflow: hidden;
}

.mac-header {
    border-bottom: 1px solid #dddddd;
    position: fixed;
    width: 100%;
    z-index: 999;
}

/* 顶部黑色区域样式 top style */
.mac-top {
    background-color: #222;
    font-size: 14px;
    color: #aaa;
    line-height: 40px;
    height: 40px;
}

.mac-top-a {
    width: 100px;
    background-color: #4cbbb4;
    display: inline-block;
    line-height: 28px;
    color: #fff;
    border-radius: 50px;
    text-align: center;
}

.mac-top-a:hover {
    color: #fff;
}

.mac-top-online {
    width: 20px;
    vertical-align: sub;
}

/* 顶部 nav style */
.mac-nav {
    background-color: rgba(255, 255, 255, 0.25);
    transition: all ease .6s;
}

.mac-head-fixed .mac-nav {
    background-color: #fff;
}

.mac-nav .flex_row {
    align-items: center;
    height: 90px;
}

.mac-nav-menu {
    width: 37px;
    cursor: pointer;
}

/* menu style */

.mac-menu {
    position: fixed;
    width: 100%;
    z-index: 1000;
    top: 0;
    left: 0;
    height: 100%;
    background-color: #fff;
    display: none;
}

.mac-menu-top {
    background-color: #fff;
    color: #666666;
}

.mac-menu-nav {
    background-color: #666666;
}

.mac-nav-close {
    width: 30px;
    cursor: pointer;
}

.mac-nav-ul {
    flex: 1;
    text-align: right;
    color: #fff;
}

.mac-nav-li {
    display: inline-block;
    font-size: 18px;
    margin-right: 100px;
    cursor: pointer;
    position: relative;
}

.mac-nav-li.on::after{
    content: "";
    position: absolute;
    background: url(../images/down.png) no-repeat;
    width: 14px;
    height: 8px;
    bottom: -12px;
    left: 28px;
}

.mac-nav-a {
    display: inline-block;
    font-size: 18px;
    margin-right: 100px;
    cursor: pointer;
    color: #fff;
}

/* .mac-nav-li.on {
    color: #4cbbb4;
} */

.mac-nav-c {
    display: none;
    justify-content: space-between;
}

.mac-nav-c.on {
    display: flex;
}

.mac-nav-c:nth-child(1),
.mac-nav-c:nth-child(3) {
    width: 1100px;
    margin: 0 auto;
    padding-top: 80px;
}

.mac-nav-c-col {
    width: 280px;
}

.mac-nav-c-col:nth-child(2).fadeIn {
    animation-delay: 0.2s;
}

.mac-nav-c-col:nth-child(3).fadeIn {
    animation-delay: 0.4s;
}

.mac-nav-c-header {
    font-size: 20px;
    color: #333;
    line-height: 1.2;
    padding-bottom: 20px;
    border-bottom: 1px dashed #d2d2d2;
}

.mac-nav-c-ul {
    height: 325px;
}

.nav-ul-header {
    font-size: 18px;
    color: #333;
    line-height: 55px;
}

.mac-nav-c-li {
    font-size: 16px;
    margin-bottom: 10px;
    margin-left: 20px;
}

.mac-nav-c-li a {
    color: #999;
}

.mac-nav-c-li a:hover {
    color: #4cbbb4;
}

.mac-nav-c:nth-child(2) {
    width: 1265px;
    margin: 0 auto;
    padding-top: 80px;
}

.mac-nav-c:nth-child(2) .figure {
    width: 250px;
    background-color: #f5f5f5;
    padding: 40px 0 45px;
    margin: 0;
    text-align: center;
}

.mac-nav-c:nth-child(2) .img {
    margin-bottom: 35px;
    border-radius: 50%;
}

.mac-nav-c:nth-child(2) .name {
    font-size: 30px;
    line-height: 36px;
    color: #666666;
    font-weight: 600;
}

.mac-nav-c:nth-child(2) .des {
    font-size: 20px;
    line-height: 50px;
    color: #999999;
}

.mac-nav-c:nth-child(2) .a {
    font-size: 18px;
    line-height: 40px;
    color: #4cbbb4;
    border: 1px solid;
    width: 120px;
    display: inline-block;
}

.mac-nav-c:nth-child(2) .figure:nth-child(2) {
    animation-delay: 0.2s;
}

.mac-nav-c:nth-child(2) .figure:nth-child(3) {
    animation-delay: 0.4s;
}

.mac-nav-c:nth-child(2) .figure:nth-child(4) {
    animation-delay: 0.6s;
}

.mac-nav-c:nth-child(2) .figure:nth-child(5) {
    animation-delay: 0.8s;
}