.ban {
    width: 100%;
    height: 584px;
    background-color: #000;
    background: url("https://imge.dangbei.com/edangbei/home/images/banner_about1.png") no-repeat center center;
    background-size: cover;
    overflow: hidden;
    text-align: center;
    position: relative;
    z-index: 10;
}

.main {
    z-index: 99;
}

.ban-text {
    position: absolute;
    left: 50%;
    -webkit-transform: translate(-50%, 0);
    -moz-transform: translate(-50%, 0);
    -ms-transform: translate(-50%, 0);
    -o-transform: translate(-50%, 0);
    transform: translate(-50%, 0);
    margin-top: 205.2px;
    z-index: 100;
    width: 67%;
}

.ban-bac {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 96;
    background: rgba(0, 0, 0, 0.46)
}

.ban-text h2,
.ban-text h3 {
    font-size: 36px;
    color: #F8F8F8;
    letter-spacing: 0;
}

.ban-text h2 {
    color: #FF9900;
    margin-bottom: 12px;
}

.ban-text p {
    font-size: 14px;
    color: #FFFFFF;
    letter-spacing: 0;
    line-height: 26px;
}

/*当贝介绍*/
.intro {
    width: 100%;
    height: 550px;
    text-align: center;
    padding-top: 150px;
    background: #f6f6f6;
}

.intro h3 {
    font-size: 24px;
    color: #333333;
    letter-spacing: 0;
    position: relative;
    margin-bottom: 25.3px;
}
.intro-top{
    margin-bottom: 25.3px;
    display: flex;
    justify-content: center;
}
.intro-top span{
    font-size: 24px;
    color: #333333;
    letter-spacing: 0;
    position: relative;
    margin: 0 10px;
    cursor: pointer;
}
.intro-top span::before{
    content: "";
    position: absolute;
    bottom: -7px;
    left: 50%;
    -webkit-transform: translate(-50%, 0);
    -moz-transform: translate(-50%, 0);
    -ms-transform: translate(-50%, 0);
    -o-transform: translate(-50%, 0);
    transform: translate(-50%, 0);
    display: inline-block;
    width: 30px;
    height: 3.9px;
    background: transparent;
}
.intro-top span.active::before{
    background: #FF9900;
}
.intro-bottom div{
    display: none;
}
.intro-bottom div.active{
    display: block;
}
.intro h3 span {
    position: absolute;
    bottom: -7px;
    left: 50%;
    -webkit-transform: translate(-50%, 0);
    -moz-transform: translate(-50%, 0);
    -ms-transform: translate(-50%, 0);
    -o-transform: translate(-50%, 0);
    transform: translate(-50%, 0);
    display: inline-block;
    width: 30px;
    height: 3.9px;
    background: #FF9900;
}

.intro p {
    font-size: 14px;
    color: #333333;
    letter-spacing: 0;
    line-height: 26px;
}

.sl-pic {
    margin-top: 80px;
}

/*成长历程*/
.up {
    width: 100%;
    height: 2300px;
    background-color: #000;
    background: url("https://imge.dangbei.com/edangbei/home/images/bg_about.png") no-repeat center center;
    background-size: cover;
    overflow: hidden;
    margin-top: 50px;
}

.up-title h3 {
    margin-top: 35px;
    text-align: center;
    font-size: 24px;
    color: #333333;
    letter-spacing: 0;
    position: relative;
}

.up-title h3 span {
    position: absolute;
    bottom: -7px;
    left: 50%;
    -webkit-transform: translate(-50%, 0);
    -moz-transform: translate(-50%, 0);
    -ms-transform: translate(-50%, 0);
    -o-transform: translate(-50%, 0);
    transform: translate(-50%, 0);
    display: inline-block;
    width: 30px;
    height: 3.9px;
    background: #FF9900;
}

.up-body {
    height: 1910px;
    width: 700px;
    margin: 0 auto;
    margin-top: 26px;
    position: relative;
}

.up-body > span {
    position: absolute;
    left: 50%;
    display: inline-block;
    height:2060px;
    width: 3px;
    background: #fff;
    margin-top: 72px;
    -webkit-transform: translate(-50%, 0);
    -moz-transform: translate(-50%, 0);
    -ms-transform: translate(-50%, 0);
    -o-transform: translate(-50%, 0);
    transform: translate(-50%, 0);
}

.up-b-one {
    float: left;
    width: 274px;
    height: 82px;
    padding: 14.8px 40px 15.2px 20px;
    filter: drop-shadow(2px 2px 6px rgba(0, 0, 0, 0.16));
    -webkit-filter: drop-shadow(2px 2px 6px rgba(0, 0, 0, 0.16));
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.70);
    margin-top: 15px;
    position: relative;
    margin-right: 100px;
}

.up-b-one:nth-of-type(2n) {
    float: right;
    margin-right: 0;
}

.up-b-one h3 {
    font-size: 22px;
    color: #333333;
    letter-spacing: 0;
    margin-bottom: 12px;
}

.up-b-one p {
    font-size: 14px;
    color: #333333;
    letter-spacing: 0;
}

.up-b-one > span {
    display: inline-block;
    width: 0;
    height: 0;
    border: 7px solid transparent;
    border-left-color: rgba(255, 255, 255, 0.70);
    position: absolute;
    top: 30px;
    right: -14px;
    z-index: 0;
}

.up-b-one:nth-of-type(2n-2) > span {
    left: -14px;
    border: 7px solid transparent;
    border-right-color: rgba(255, 255, 255, 0.70);
}

.up-b-one > i {
    display: inline-block;
    width: 10px;
    height: 10px;
    background: #fff;
    position: absolute;
    top: 32px;
    right: -21px;
    border-radius: 50%;
}

.up-b-one:nth-of-type(2n) > i {
    left: -21px;
}

.up-time {
    position: absolute;
    top: 0;
    left: 50%;
    width: 72px;
    height: 72px;
    line-height: 72px;
    text-align: center;
    background: #999999;
    font-size: 18px;
    color: #FFFFFF;
    letter-spacing: 0;
    border-radius: 50%;
    -webkit-transform: translate(-50%, 0);
    -moz-transform: translate(-50%, 0);
    -ms-transform: translate(-50%, 0);
    -o-transform: translate(-50%, 0);
    transform: translate(-50%, 0);
}

.up-time span {
    display: inline-block;
    position: absolute;
    bottom: 17px;
    left: 47%;
    height: 10px;
    width: 10px;
    border: 2px solid #fff;
    transform: rotate(-45deg) translate(-50%, 0);
    -ms-transform: rotate(-45deg) translate(-50%, 0); /* IE 9 */
    -moz-transform: rotate(-45deg) translate(-50%, 0); /* Firefox */
    -webkit-transform: rotate(-45deg) translate(-50%, 0); /* Safari 和 Chrome */
    -o-transform: rotate(-45deg) translate(-50%, 0);
    border-top-color: transparent;
    border-right-color: transparent;
}

.up-end {
    width: 78px;
    height: 78px;
    border-radius: 50%;
    position: absolute;
    bottom: -280px;
    left: 50%;
    -webkit-transform: translate(-50%, 0);
    -moz-transform: translate(-50%, 0);
    -ms-transform: translate(-50%, 0);
    -o-transform: translate(-50%, 0);
    transform: translate(-50%, 0);
    background: rgba(255, 153, 0, 0.40);
}

.up-end:before {
    content: '开始';
    display: inline;
    width: 72px;
    height: 72px;
    border-radius: 50%;
    line-height: 72px;
    text-align: center;
    background: #FF9900;
    color: #fff;
    position: absolute;
    top: 3px;
    left: 3px;
}