.banner {
    width: 100%;
    min-height: 44vh;
    background: #ffffff url(../images/about-us-banner.jpg) center bottom no-repeat;
    background-size: cover;
}


/* 选项卡 */
.nav-content {
    /*height: 4.5rem;*/
    /*line-height: 5rem;*/
    border-bottom: 1px solid #DDDDDD;
    overflow-y: hidden;
    overflow-x: auto;
}
.nav-content .nav-tabs {
    border-bottom: none;
}
.nav-content .nav-tabs li {
    margin-right: 3rem;
}
.nav-content .nav-tabs li a, .nav-content .nav-tabs li a:hover{
    height: calc( 4.5rem - 1px );
    line-height: 5rem;
    font-size: 1.6rem;
    font-weight: 400;
    color: #666666;
    text-decoration: none;
    padding: 0 0.8rem;
    border-bottom: 1px solid transparent;
    background-color: transparent;
}
.nav-content .nav-tabs li a.active {
    color: #333333;
    border-bottom: 1px solid #333333;
}


/* 文章 */
.article-main {
    background: #F8F8F8;
    padding-bottom: 20vh;
}
.article-title {
  margin: 6rem 0;
}
.article-title .cn {
    font-size: 2.6rem;
    font-weight: bold;
    color: #333333;
    line-height: 2.3rem;
    margin-bottom: 1rem;
}
.article-title .en {
    font-size: 2.4rem;
    font-weight: 400;
    color: #BBBBBB;
    line-height: 3rem;
    text-transform: uppercase;
}

.article-content .text {
    font-size: 1.5rem;
    font-weight: 400;
    color: #666666;
    line-height: 2.8rem;
}

.article-content div{
    margin-bottom: 3rem;
}

.article-content p{
    color: #666666;
}
.article-content p.title {
    color: #333333; 
    font-weight: bold;
    font-size: 1.5rem;
}
.article-content ul{
    color: #666666;
    margin-top: 1rem;
}
.article-content .big-cn {
    font-size: 3rem;
    font-weight: bold;
    color: #333333;
    line-height: 4rem;
}
.article-content .big-cn-en {
    font-size: 1.3rem;
    font-weight: 400;
    color: #333333;
}

.mrb-1 {
    margin-bottom: 1rem;
}
.article-content p.title.txt-light {
    font-weight: normal;
}