.banner {
    width: 100%;
    min-width: 1200px;
    height: 264px;
    background: url(https://www.f139content.com/website/sci99/images/banner_consult.png) top center no-repeat;
}

.div_main {
    background: #fff;
    width: 1200px;
    min-height: 500px;
    margin: 0 auto;
    padding: 32px 0 57px 0;
}

.leftnav {
    width: 110px;
    float: left;
}

.vertical-divider {
    height: 300px;
    width: 2px;
    background-color: #CFD1D8;
    float: left;
    margin-right: 36px;
}

.leftnav a {
    display: block;
    width: 56px;
    height: 24px;
    margin-bottom: 20px;
    cursor: pointer;
    font-size: 14px;
    color: #666666;
    font-family: SourceHanSansCN, sans-serif;
}

.leftnav a:hover {
    color: #2050D1;
    font-weight: 700;
    border-bottom: 2px solid #2050D1;
}

.leftnav a.active {
    color: #2050D1;
    font-weight: 700;
    border-bottom: 2px solid #2050D1;
}

.content {
    width: 1052px;
    float: right;
    display: none;
}

.content.active {
    display: block;
}

.clearfix:after {
    visibility: hidden;
    display: block;
    font-size: 0;
    content: " ";
    clear: both;
    height: 0;
}

.content .summary {
    background: #F6F6F6;
    border-radius: 8px;
    padding: 11px 16px;
    overflow-wrap: break-word;
    color: #000000;
    font-size: 14px;
    font-family: SourceHanSansCN, sans-serif;
    text-align: justify;
    line-height: 20px;
    margin-bottom: 32px;
}

.content .item {
    margin-bottom: 20px;
}

.content .item .title {
    font-family: SourceHanSansCN, sans-serif;
    font-weight: 700;
    font-size: 16px;
    line-height: 16px;
    height: 16px;
    color: #000000;
    border-left: 2px solid #EA5504;
    padding-left: 8px;
}

.content .item p {
    overflow-wrap: break-word;
    color: #000;
    font-size: 14px;
    font-family: SourceHanSansCN, sans-serif;
    line-height: 24px;
    margin: 8px 0 0 10px;
}

/* 按钮组样式 */
.content .item .button-group-container {
    margin: 8px 0 0 10px;
}

/* 按钮基础样式 */
.content .item .button-group-container .button-group .button {
    padding: 3px 8px;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    font-size: 14px;
    line-height: 20px;
    font-family: SourceHanSansCN, sans-serif;
    color: #000;
    background: linear-gradient( 180deg, #FFFFFF 0%, #ECF1FF 100%);
    margin-right: 16px;
}

/* 按钮激活状态 */
.content .item .button-group-container .button-group .button.active {
    background: linear-gradient( 180deg, #FFFFFF 0%, #CCD9FF 100%);
    color: #2050D1;
    position: relative;
}

.content .item .button-group-container .button-group .button.active::after {
    content: "";
    position: absolute;
    bottom: -14px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;
    border-bottom: 10px solid #F6F6F6;;
}

/* 描述容器 */
.content .item .button-group-container .description-container {
    min-height: 50px;
    padding: 10px 0;
}

/* 描述内容 */
.content .item .button-group-container .description-container .description {
    display: none;
    background: #F6F6F6;
    font-size: 16px;
    line-height: 24px;
    font-family: SourceHanSansCN, sans-serif;
    padding: 8px 12px;
    border-radius: 8px;
}

/* 激活的描述内容 */
.content .item .button-group-container .description-container .description.active {
    display: block;
}