#center {
    position: relative;
    min-height: 450px;
}

.container {
    position:relative;
    width: 1200px;
    margin: 0 auto;
}

.content-main {
    width: 100%;
    margin-top: 20px;
    margin-bottom: 20px;
    background-color: #fff;
}

.content-main:after {
    content: " ";
    clear: both;
    display: table;
}

.left {
    width: 360px;
    float: left;
    text-align: center;
    padding-top: 70px;
}

.right {
    width: 840px;
    float: left;
    padding-top: 70px;
}

.exchange-center-content {
    padding-right: 80px;
    padding-bottom: 80px;
}

.exchange-center-content .h1 {
    font-size: 28px;
    line-height: 36px;
    color: #333;
    text-align: left;
    padding-bottom: 30px;
    border-bottom: 1px solid #eee;
}

.exchange-center-content .h2 {
    font-size: 20px;
    line-height: 25px;
    color: #333;
    padding: 25px 0;
}

.exchange-center-content .summary {
    font-size: 16px;
    line-height: 30px;
    color: #999999;
    font-family: "Arial";
    text-align: justify;
}

.exchange-center-content .sub-title {
    width: 100%;
    position: relative;
    padding-top: 40px;
    padding-left: 15px;
    font-size: 20px;
    line-height: 1;
    color: #3d3d3e;
    font-family: "Arial";
}

.exchange-center-content .sub-title:before {
    content: "";
    display: block;
    width: 6px;
    height: 15px;
    background-color: #ffb301;
    position: absolute;
    left: 0;
    bottom: 2px;
}

.exchange-center-content .tag-list {
    display: block;
    padding-top: 25px;
}

.exchange-center-content .tag-list li {
    font-size: 16px;
    line-height: 22px;
    color: #00346c;
    font-family: "Arial";
    font-weight: bold;
}

.exchange-center-content .text {
    font-size: 16px;
    line-height: 30px;
    color: #999999;
    font-family: "Arial";
    padding-top: 15px;
    text-align: justify;
}

.exchange-center-content .text p {
    text-indent: 2em;
}

.exchange-center-content .text p + p {
    margin-top: 20px;
}

.clearfix {
    width: 100%;
    clear: both;
}

.teachnology-leader-content {
    padding: 0 80px 80px;
}

.teachnology-leader-content .sub-title {
    width: 100%;
    position: relative;
    padding-top: 40px;
    padding-left: 15px;
    font-size: 20px;
    line-height: 1;
    color: #3d3d3e;
    font-family: "Arial";
}

.teachnology-leader-content .sub-title:before {
    content: "";
    display: block;
    width: 6px;
    height: 15px;
    background-color: #ffb301;
    position: absolute;
    left: 0;
    bottom: 2px;
}

.teachnology-leader-content .text {
    font-size: 16px;
    line-height: 30px;
    color: #999999;
    font-family: "Arial";
    padding-top: 15px;
    text-align: justify;
}

.teachnology-leader-content .text p {
    text-indent: 2em;
}

.teachnology-leader-content .text p + p {
    margin-top: 20px;
}