.bottom_con {
    padding-top: 44px;
    padding-bottom: 50px;
}

.ad {
    display: block;
    width: 100%;
    height: 500px;
    overflow: hidden;
    background-color: #dee3e9;
}

.ad img {
    display: block;
    width: 100%;
}

.breadCrumbs {
    width: 1200px;
    margin: 0 auto;
    border-bottom: 1px solid #ececec;
}

.breadCrumbs a {
    float: left;
    font-size: 14px;
    letter-spacing: 1px;
    line-height: 32px;
    color: #666666;
}

.breadCrumbs a:not(:last-child) {
    position: relative;
    padding-right: 30px;
}

.breadCrumbs a:not(:last-child)::before {
    position: absolute;
    top: 50%;
    right: 13px;
    transform: translateY(-50%);
    content: "";
    clear: both;
    display: block;
    width: 5px;
    height: 10px;
    background: url(../images/icon_breadCrumbs_to.png) no-repeat center;
    background-size: contain;
}

.breadCrumbs a.active {
    font-weight: bold;
    color: #155da5;
}

.content {
    width: 1200px;
    margin: 0 auto;
    padding-top: 40px;
}

.content .side {
    display: block;
    width: 280px;
    float: left;
}

.content .side_item:last-child {
    padding-top: 40px;
}

.content .side_item p.title {
    font-size: 16px;
    letter-spacing: 1px;
    color: #333333;
    line-height: 1;
    font-weight: bold;
}

.content .side_item_list {
    padding-top: 20px;
    padding-bottom: 48px;
}

.content .side_item_list ul li:hover {
    color: #155da5;
    font-weight: bold;
}

.content .side_item_list ul li.active {
    position: relative;
    color: #155da5;
    font-weight: bold;
    background-color: #f8f8f8;
}

.content .side_item_list ul li.active::before {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    right: 24px;
    content: "";
    clear: both;
    display: block;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 5px 8px;
    border-color: transparent transparent transparent #155da5;
}

.content .side_item_list ul li a {
    display: block;
    line-height: 56px;
    padding: 0 25px;
    font-size: 14px;
    letter-spacing: 1px;
    color: #333333;
    border-bottom: 1px solid #ececec;
}

.content .side_item_desc p.sTitle {
    font-size: 14px;
    letter-spacing: 1px;
    color: #333333;
    line-height: 1;
    padding-bottom: 11px;
    padding-top: 26px;
}

.content .side_item_desc p b {
    display: block;
    font-size: 20px;
    letter-spacing: 1px;
    color: #155da5;
    line-height: 42px;
}

.content .side_item_code img {
    display: block;
    width: 132px;
    margin-top: 24px;
}

.content .main {
    display: block;
    width: 920px;
    padding-left: 40px;
    float: left;
}