@charset "utf-8";

/* CSS Document */

.header {
    width: 100%;
    height: 152px;
    background: url(../images/header_bg.png) no-repeat;
    background-position: 50%;
    background-size: cover;
    overflow: hidden;
}

.header .head_top {
    margin-top: 15px;
    width: 100%;
    text-align: right;
    overflow: hidden;
}

.header .head_top a {
    margin-right: 55px;
    font-size: 16px;
    color: #333;
}

.header .head_top a:hover {
    color: #bd1a2d;
}

.header .head_bottom {
    width: 100%;
    overflow: hidden;
}

.header .head_bottom .logo {
    float: left;
}

.header .head_bottom .logo img {
    width: 640px;
}
.header .head_bottom .head_right{
    float: right;
    width: 374px;
}
.header .head_bottom .head_right p{
    font-size: 16px;
    color: #666;
}

.header .head_bottom .search_box {
    float: right;
    margin-top: 17px;
    width: 100%;
    height: 58px;
    border-radius: 10px;
    background: #fff;
    border: 1px solid #bd1a2d;
    overflow: hidden;
}

.header .head_bottom .search_box input {
    float: left;
    padding: 0 15px;
    height: 56px;
    font-size: 20px;
    color: #666;
    border: 0;
}

.header .head_bottom .search_box input::-webkit-input-placeholder {
    font-size: 20px;
    color: #c0c4cc;
}

.header .head_bottom .search_box input:-moz-placeholder {
    font-size: 20px;
    color: #c0c4cc;
}

.header .head_bottom .search_box input::-moz-placeholder {
    font-size: 20px;
    color: #c0c4cc;
}

.header .head_bottom .search_box input:-ms-input-placeholder {
    font-size: 20px;
    color: #c0c4cc;
}

.header .head_bottom .search_box button {
    float: right;
    width: 65px;
    height: 56px;
    background: #fff;
    border: 0;
    border-left: 1px solid #bd1a2d;
    overflow: hidden;
}

.nav {
    width: 100%;
    height: 60px;
    background: #bd1a2d;
}

.nav ul {
    padding: 0;
    margin: 0;
    list-style: none;
    display: flex;
    justify-content: center;
}

.nav ul li {
    float: left;
    height: 60px;
    font-size: 18px;
    color: #fff;
    font-weight: bold;
    line-height: 60px;
    border-bottom: 2px solid transparent;
    transition: border-color .3s, background-color .3s, color .3s;
}

.nav ul li:hover {
    background: #a31223;
}

.nav ul li.active {
    color: #f5d389;
    border-bottom-color: #f5d389;
}

.nav ul li a {
    padding: 0 24px;
}

.section {
    width: 100%;
    overflow: hidden;
}

.news_slide {
    float: left;
    width: 580px;
    height: 368px;
    overflow: hidden;
}

.news_slide .swiper {
    position: relative;
}

.news_slide .swiper-slide img {
    width: 100%;
    height: 368px;
}

.news_slide .swiper-slide .cover_section {
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 10px;
    padding-right: 100px;
    background-color: #000;
    opacity: .5;
    color: #fff;
}

.news_slide .swiper-slide .cover_section p {
    font-size: 14px;
    color: #fff;
    line-height: 21px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.news_slide .swiper-pagination {
    padding-right: 30px;
    text-align: right;
    bottom: var(--swiper-pagination-bottom, 14px);
}

.news_slide .swiper-button-next,
.news_slide .swiper-button-prev {
    font-size: 16px;
    color: #ccc;
    outline: none;
}

.news_slide .swiper-pagination-bullet {
    outline: none;
}

.news_slide .swiper-pagination-bullet.swiper-pagination-bullet-active {
    background: #bd1a2d;
}

.newswork_section {
    float: right;
    width: 580px;
}

.section_title {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 47px;
    border-bottom: 2px solid #e9e9e9;
    font-size: 20px;
    font-weight: 700;
}

.section_title h6 {
    display: flex;
    font-size: 20px;
    line-height: 47px;
    text-align: center;
    align-items: center;
    color: #bd1a2d;
}

.section_title h6 img {
    margin-right: 10px;
    width: 20px;
    height: 20px;
}

.section_title .more,
.section_title3 .more {
    font-size: 12px;
    color: #666;
}

.section_title .more img,
.section_title3 .more img {
    margin-right: 10px;
    margin-left: 5px;
    position: relative;
    top: -1px;
}

.news_list {
    margin: 0;
    margin-top: 10px;
    padding: 0;
    list-style: none;
    overflow: hidden;
}

.news_list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 11px 0;
    padding-bottom: 12px;
    height: 47px;
    color: #666;
    font-size: 18px;
}

.news_list li a {
    max-width: 79%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.news_list li a .list-sign {
    display: inline-block;
    width: 8px;
    height: 8px;
    background-color: #bd1a2d;
    margin-right: 10px;
}

.news_list li a:hover {
    color: #bd1a2d;
}

.news_list li .time {
    font-size: 16px;
    color: #777;
}

.section.two {
    margin-top: 12px;
}

.quick_section {
    float: left;
    margin-top: 18px;
    width: 580px;
}

.section_title2 {
    display: flex;
    margin-bottom: 17px;
    line-height: 30px;
}

.section_title2 h6 {
    padding: 0 15px;
    font-size: 20px;
    font-weight: 700;
    color: #bd1a2d;
    white-space: nowrap;
    border-left: 4px solid #bd1a2d;
}

.section_title2 .item_line {
    width: 100%;
    border-bottom: 4px solid #bd1a2d;
}

.quick_list,
.quick_list2 {
    display: flex;
    margin: 0;
    padding: 0;
    list-style: none;
}

.quick_list li {
    float: left;
    position: relative;
    display: table;
    margin: 13px;
    width: 33.33%;
    height: 110px;
    background-color: #fce9dc;
}

.quick_list li a,
.quick_list2 li a {
    display: table-cell;
    vertical-align: middle;
    padding: 0 5px;
}

.quick_list li .icon_box,
.quick_list2 li .icon_box {
    margin: 0 auto;
    width: 46px;
    height: 46px;
}

.quick_list li .icon_box img,
.quick_list2 li .icon_box img {
    width: 100%;
    height: 100%;
}

.quick_list li p,
.quick_list2 li p {
    font-size: 18px;
    font-weight: 500;
    color: #333;
    text-align: center;
}

.quick_list2 li {
    position: relative;
    float: left;
    display: table;
    margin: 13px;
    width: 50%;
    height: 110px;
    background-color: #fce9dc;
}

.quick_list li:hover .cover_tooltip,
.quick_list2 li:hover .cover_tooltip {
    display: block;
}

.cover_tooltip {
    display: none;
    position: absolute;
    top: -43px;
    left: 0;
    right: 0;
    margin: 0 auto;
    padding: 10px;
    z-index: 2000;
    font-size: 12px;
    color: #fff;
    line-height: 1.2;
    min-width: 10px;
    width: 80px;
    text-align: center;
    word-wrap: break-word;
    border-radius: 4px;
    background: #303133;
    transition: .3s;
}

.cover_tooltip::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -12px;
    margin: 0 auto;
    display: block;
    width: 0;
    height: 0;
    border-color: transparent;
    border-style: solid;
    border-width: 6px;
    border-top-color: #000;
}

.news_tab {
    float: right;
    width: 580px;
}

.news_tab .hd {
    position: relative;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 47px;
    font-size: 20px;
    font-weight: 700;
    color: #666;
    border-bottom: 2px solid #e9e9e9;
}

.news_tab .hd ul {
    display: flex;
    padding: 0;
    margin: 0;
    list-style: none;
    height: 47px;
    line-height: 47px;
    text-align: center;
}

.news_tab .hd ul li {
    float: left;
    padding: 0 30px;
    font-size: 20px;
    color: #666;
    cursor: pointer;
}

.news_tab .hd li .more {
    display: none;
    position: absolute;
    top: 0;
    right: 0;
    font-size: 12px;
    color: #666;
}

.news_tab .hd li .more img {
    position: relative;
    top: -2px;
    margin-right: 10px;
    margin-left: 5px;
}

.news_tab .hd ul li.on {
    height: 47px;
    line-height: 47px;
    text-align: center;
    color: #bd1a2d;
    border-bottom: 4px solid #bd1a2d;
}

.news_tab .hd ul li.on .more {
    display: block;
}

.section.three {
    margin-top: 12px;
    margin-bottom: 70px;
}

.exhibition_section {
    float: left;
    width: 580px;
}

.section_title3 {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 47px;
    font-size: 20px;
    font-weight: 700;
    color: #666;
    border-bottom: 2px solid #e9e9e9;
}

.section_title3 h6 {
    padding: 0 30px;
    height: 47px;
    font-size: 20px;
    line-height: 47px;
    text-align: center;
    color: #bd1a2d;
    cursor: pointer;
    border-bottom: 4px solid #bd1a2d;
}

.construction_section {
    width: 100%;
    text-align: center;
}

.construction_section img {
    width: 300px;
    height: 320px;
}

.footer {
    padding: 20px 0;
    width: 100%;
    line-height: 2;
    background: #bd1a2d;
    overflow: hidden;
}

.footer a:hover {
    text-decoration: underline;
}

.footer .w1200 {
    display: flex;
    justify-content: center;
}

.footer .footer_link {
    display: flex;
    flex-wrap: wrap;
    padding: 20px 8px;
    width: 325px;
    background-color: #a61626;
    border-radius: 1px;
}

.footer .footer_link .item_link {
    width: 50%;
    padding: 4px 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.footer .footer_link .item_link a {
    font-size: 14px;
    color: #fff;
    font-weight: 500;
}

.footer .footer_copyright {
    margin-left: 35px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px 10px;
    width: 427px;
    border-radius: 1px;
    background-color: #a61626;
}

.footer .footer_copyright .item_cont {
    flex: 1;
    display: flex;
    text-align: center;
    flex-direction: column;
    padding: 12px 20px;
}

.footer .footer_copyright p {
    font-size: 14px;
    color: #fff;
    line-height: 21px;
    font-weight: 500;
}

.footer .footer_copyright p:first-child {
    margin-bottom: 14px;
}

.footer .footer_wechat {
    padding: 7px;
    margin: 0 4px;
    margin-left: 40px;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #a61626;
}

.footer .footer_wechat img {
    width: 70px;
    height: 70px;
    border-radius: 3px;
}
.footer .footer_wechat .footer_wechatbox{
    margin-top: 8px;
    margin-left: 10px;
    overflow: hidden;
}

.footer .footer_wechat p {
    margin-bottom: 5px;
    font-size: 12px;
    color: #fff;
    line-height: 18px;
}

.backtop {
    display: none;
    position: fixed;
    right: 140px;
    bottom: 170px;
    background-color: #fff;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    color: #bd1a2d;
    box-shadow: 0 0 6px rgba(0, 0, 0, .12);
    cursor: pointer;
    z-index: 1500;
}

.backtop:hover {
    background-color: rgba(189, 26, 45, .1)
}

.backtop a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
}

.backtop i {
    display: inline-block;
    width: 30px;
    height: 30px;
    background: url(../images/icon13.png) center no-repeat;
}

.page_content {
    margin: 20px 0;
}

.sidenav {
    float: left;
    width: 190px;
    box-shadow: 0 2px 12px 0 rgba(0, 0, 0, .1);
    border-radius: 4px;
    border: 1px solid #ebeef5;
    background-color: #fff;
    transition: .3s;
    overflow: hidden;
}

.sidenav_title {
    position: relative;
    height: 40px;
    line-height: 40px;
    text-align: center;
    color: #fff;
    font-weight: 700;
    font-size: 18px;
    background-color: #bd1a2d;
}

.side_nav {
    padding: 0;
    margin: 0;
    list-style: none;
    overflow: hidden;
}

.side_nav li {
    height: 44px;
    transition: border-color .3s, background-color .3s, color .3s;
}

.side_nav li a {
    display: block;
    padding: 0 20px;
    font-size: 18px;
    line-height: 44px;
    color: #666;
}

.side_nav li a i {
    display: inline-block;
    margin-right: 5px;
    width: 24px;
    height: 15px;
    background: url(../images/icon10.png) center center no-repeat;
    background-size: 15px;
}

.side_nav li:hover {
    background: #ccc;
}

.side_nav li.active a i,
.side_nav.two li:hover a i {
    background: url(../images/icon10_2.png) center center no-repeat;
    background-size: 15px;
}

.side_nav li.active a,
.side_nav.two li:hover a {
    color: #bd1a2d;
}

.side_nav.two li {
    height: 40px;
    line-height: 40px;
}

.side_nav.two li a {
    line-height: 40px;
}

.side_nav.two li.two a {
    padding-left: 50px;
}

.side_nav.two li.two a {
    font-size: 16px;
}

.cont_right {
    float: right;
    width: 998px;
    transition: .3s;
}

.cont_rightbox {
    padding-bottom: 30px;
    width: 100%;
    min-height: calc(100vh - 404px);
    box-shadow: 0 2px 12px 0 rgba(0, 0, 0, .1);
    border-radius: 4px;
    border: 1px solid #ebeef5;
    background-color: #fff;
    overflow: hidden;
}

.BreadNav {
    margin: 0 8px;
    padding: 12px 0 8px 0;
    font-size: 14px;
    color: #303133;
    border-bottom: 2px solid #ccc;
}

.BreadNav a {
    padding-right: 17px;
    font-size: 14px;
    color: #bd1a2d;
    background: url(../images/icon12.png) 98% center no-repeat;
    background-size: 10px;
}

.introduction_section {
    padding: 10px 29px;
    overflow: hidden;
}

.introduction_title {
    width: 100%;
    text-align: center;
    overflow: hidden;
}

.introduction_title h6 {
    margin-bottom: 14px;
    font-size: 28px;
    color: rgba(0, 0, 0, .85);
    line-height: 30px;
}

.introduction_title p {
    font-size: 14px;
    color: #999;
    line-height: 21px;
    text-align: center;
}

.introduction_text {
    margin-top: 40px;
    overflow: hidden;
}

.introduction_text,
.introduction_text p {
    font-size: 18px;
    color: #3d3d3d;
    line-height: 30px;
    text-align: justify;
    text-justify: inter-ideograph;
}

.introduction_text img,
.introduction_text p img {
    max-width: 100%;
}

.first_list {
    margin: 15px 15px;
    padding: 10px;
    list-style: none;
    overflow: hidden;
}

.first_list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    font-size: 18px;
    color: #666;
}

.first_list li a {
    max-width: 70%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.first_list li a:hover {
    color: #bd1a2d;
}

.first_list li a .list-sign {
    display: inline-block;
    width: 8px;
    height: 8px;
    background-color: #666;
    margin-right: 10px;
}

.first_list li .time {
    font-size: 16px;
    color: #777;
}

.allnews {
    margin: 15px 15px;
    padding: 10px;
    overflow: hidden;
}

.allnews .first_list {
    padding: 0;
    margin: 0;
    padding-bottom: 7px;
    margin-bottom: 7px;
    border-bottom: 2px dashed rgba(0, 0, 0, .3);
    overflow: hidden;
}

.allnews .first_list:last-child {
    border-bottom: 0;
}

.TextBox {
    padding: 18px;
    overflow: hidden;
}

.quick_nav {
    margin: 0;
    margin-top: 15px;
    padding: 0;
    list-style: none;
}

.quick_nav li {
    float: left;
    position: relative;
    padding: 0 10px;
    width: 33.33%;
}

.quick_nav li:hover .cover_tooltip {
    display: block;
}

.quick_nav li img {
    width: 100%;
}

.knowledge_section {
    margin: 35px 0;
    overflow: hidden;
}

.section_title4 {
    position: relative;
    padding: 0 10px;
    height: 30px;
    font-size: 18px;
    color: #bd1a2d;
    font-weight: 500;
    line-height: 30px;
}

.section_title4::after {
    content: "";
    position: absolute;
    left: 0;
    width: 3px;
    height: 30px;
    background-color: #bd1a2d;
}

.cont_right.two .cont_rightbox {
    box-shadow: none;
    border: 0;
}

.objection_section {
    margin: 0 8px;
    margin-top: 25px;
    overflow: hidden;
}

.objection_text {
    width: 100%;
    overflow: hidden;
}

.objection_text h6 {
    font-size: 16px;
    color: #333;
}

.objection_text p {
    margin-top: 6px;
    font-size: 16px;
    color: #333;
    line-height: 24px;
}

.objection_text p span {
    color: #BD1A2D;
}

.objection_text p a {
    color: #698DD5;
}

.objection_form {
    margin-top: 25px;
    width: 100%;
    overflow: hidden;
}

.objection_item {
    float: left;
    margin-bottom: 25px;
    width: 100%;
    overflow: hidden;
}

.objection_item .item_tit {
    display: block;
    float: left;
    width: 162px;
    font-size: 16px;
    color: #333;
    text-align: right;
    line-height: 38px;
}

.objection_item .item_tit span {
    margin-right: 5px;
    color: #BD1A2D;
}

.objection_item .item_cont {
    margin-left: 162px;
    overflow: hidden;
}

.objection_item .item_cont input {
    float: left;
    padding-left: 15px;
    width: 100%;
    height: 38px;
    font-size: 14px;
    color: #666;
    background: #fff;
    border: 1px solid #E3E5EB;
    border-radius: 3px;
}

.objection_item .yzm_btn {
    float: left;
    display: block;
    margin-left: 10px;
    width: 90px;
    height: 38px;
    font-size: 14px;
    color: #fff;
    line-height: 38px;
    text-align: center;
    background: #BD1A2D;
    border-radius: 3px;
}

.objection_item.two {
    margin-left: 30px;
    width: 445px;
}

.objection_item.two .item_tit {
    line-height: 24px;
    width: 225px;
    text-align: left;
}

.objection_item.two .item_tit p {
    line-height: 24px;
}

.objection_item.two .item_tit i {
    display: block;
    font-size: 12px;
    color: #999;
    font-style: normal;
}

.objection_item.two .item_cont {
    margin-left: 235px;
}

.file_box {
    position: relative;
}

.file_box input {
    opacity: 0;
    position: relative;
    z-index: 9;
}

.file_box a {
    position: absolute;
    top: 0;
    left: 0;
    width: 90px;
    height: 38px;
    font-size: 14px;
    color: #fff;
    text-align: center;
    line-height: 38px;
    background: #BD1A2D;
    border-radius: 3px;
}

.objection_item .item_cont .radio_box {
    line-height: 35px;
}

.objection_item .item_cont .radio_box span {
    margin-right: 30px;
    font-size: 16px;
    color: #666;
}

.objection_item .item_cont .radio_box input {
    float: none;
    margin: 0;
    margin-right: 5px;
    padding: 0;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    position: relative;
    top: 3px;
    width: 20px;
    height: 20px;
    background: #fff;
    border: 1px solid #E3E5EB;
    border-radius: 50%;
}

.objection_item .item_cont .radio_box input:checked {
    border-color: #BD1A2D;
}

.objection_item .item_cont .radio_box input:checked::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    margin: auto;
    width: 10px;
    height: 10px;
    background: #BD1A2D;
    border-radius: 50%;
}

.objection_item .item_cont textarea {
    padding: 5px 15px;
    width: 100%;
    height: 100px;
    font-size: 14px;
    color: #666;
    background: #fff;
    border: 1px solid #E3E5EB;
    border-radius: 3px;
}

.objection_item .item_cont .yzmimg_box {
    float: left;
    margin-left: 10px;
    /*margin-top: 4px;*/
    width: 80px;
}

.objection_item .item_cont .yzmimg_box img {
    width: 100%;
    height: 38px;
}

.objection_item button {
    margin: 0 10px;
    width: 80px;
    height: 38px;
    font-size: 16px;
    color: #fff;
    border: 0;
    background: #BD1A2D;
    border-radius: 3px;
}

.m_nav_btn,
.m_nav_cover,
.m_nav_pop {
    display: none;
}

@media screen and (min-width:0px) and (max-width:1340px) {
    .w1200 {
        width: 85%;
    }
    .news_slide,
    .newswork_section,
    .quick_section,
    .news_tab,
    .exhibition_section {
        width: 48%;
    }
    .cont_right {
        width: calc(100% - 205px);
    }
}

@media screen and (min-width:0px) and (max-width:1220px) {
    .header .head_bottom {
        display: flex;
        align-items: flex-end;
        justify-content: space-between;
    }
    .header .head_bottom .logo {
        width: calc(100% - 404px);
    }
    .header .head_bottom .logo img {
        width: 100%;
    }
}

@media screen and (min-width:0px) and (max-width:1085px) {
    .nav ul li a {
        padding: 0 15px;
    }
}

@media screen and (min-width:0px) and (max-width:980px) {
    .footer .footer_wechat {
        width: 170px;
    }
}

@media screen and (min-width:0px) and (max-width:920px) {
    .nav ul li {
        font-size: 16px;
    }
}

@media screen and (min-width:0px) and (max-width:870px) {
    .news_list li a {
        max-width: 75%;
    }
}

@media screen and (min-width:0px) and (max-width:810px) {
    .footer .footer_wechat {
        width: 230px;
    }
    .footer .footer_link .item_link {
        padding: 4px 7px;
    }
    .footer .footer_copyright .item_cont {
        padding: 12px 0;
    }
}

@media screen and (min-width:0px) and (max-width:768px) {
    .header .head_bottom {
        display: block;
        position: relative;
    }
    .header .head_bottom .logo {
        margin-top: 30px;
    }
    .header .head_bottom .head_right {
        float: left;
        margin-left: 20px;
        width: 320px;
    }
    .m_nav_btn {
        display: block;
        position: absolute;
        top: 19px;
        right: 0;
        bottom: 0;
        margin: auto 0;
        width: 30px;
        height: 30px;
        background: url(../images/icon2.jpg) no-repeat;
        background-size: cover;
    }
    .m_nav_cover {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, .65);
        z-index: 99;
    }
    .m_nav_pop {
        width: 40%;
        height: 100%;
        position: fixed;
        right: 145%;
        top: 0;
        display: block;
        transition: right 0.3s;
        background: #bd1a2d;
        border-right: 1px solid #e6e6e6;
        box-shadow: 0 8px 10px -5px rgba(0, 0, 0, .2), 0 16px 24px 2px rgba(0, 0, 0, .14), 0 6px 30px 5px rgba(0, 0, 0, .12);
        z-index: 99999;
        overflow-y: auto;
    }
    .m_nav_pop ul {
        padding: 0;
        margin: 0;
        list-style: none;
    }
    .m_nav_pop ul li {
        transition: border-color .3s, background-color .3s, color .3s;
    }
    .m_nav_pop ul li:hover {
        background: #a31223;
    }
    .m_nav_pop ul li a {
        display: block;
        padding: 0 24px;
        font-size: 18px;
        color: #fff;
        text-align: center;
        font-weight: 600;
        line-height: 55px;
    }
    .m_nav_pop ul li.active a {
        color: #f5d389;
    }
    .section_title h6,
    .news_tab .hd ul li,
    .section_title3 h6,
    .section_title2 h6 {
        font-size: 18px;
    }
    .news_tab .hd ul li,
    .section_title3 h6 {
        padding: 0 15px;
    }
    .sidenav,
    .cont_right {
        float: none;
        width: 100%;
    }
    .sidenav {
        position: relative;
        overflow: inherit;
        overflow: initial;
    }
    .sidenav_title {
        background-image: url(../images/icon11.png);
        background-repeat: no-repeat;
        background-position: 95% center;
        background-size: 18px;
    }
    .side_nav {
        position: absolute;
        top: 100%;
        right: 0;
        z-index: 10;
        padding: 10px 0;
        margin: 5px 0;
        margin-top: 12px;
        background-color: #fff;
        border: 1px solid #ebeef5;
        border-radius: 4px;
        box-shadow: 0 2px 12px 0 rgba(0, 0, 0, .1);
        overflow: inherit;
        overflow: initial;
    }
    .side_nav::after {
        content: "";
        position: absolute;
        top: -6px;
        left: 8px;
        display: block;
        margin-right: 3px;
        width: 0;
        height: 0;
        border-color: transparent;
        border-style: solid;
        border-width: 6px;
        filter: drop-shadow(0 2px 12px rgba(0, 0, 0, .03));
        border-top-width: 0;
        border-bottom-color: #fff;
    }
    .nav,
    .side_nav {
        display: none;
    }
}

@media screen and (min-width:0px) and (max-width:640px) {
    .w1200 {
        width: 90%;
    }
    .header {
        padding-bottom: 15px;
        height: auto;
    }
    .header .head_top {
        margin-top: 10px;
    }
    .header .head_top a {
        margin-right: 0;
        font-size: 14px;
    }
    .header .head_bottom .logo {
        float: none;
        margin-top: 10px;
        width: 80%;
    }
    .header .head_bottom .head_right {
        float: none;
        width: 100%;
    }
    .m_nav_btn {
        margin: 0;
        top: 20px;
        width: 22px;
        height: 22px;
    }
    .header .head_bottom .search_box {
        margin-left: 0;
        margin-top: 10px;
        height: 40px;
    }
    .header .head_bottom .search_box input,
    .header .head_bottom .search_box button {
        height: 38px;
        line-height: 38px;
    }
    .header .head_bottom .search_box input {
        font-size: 16px;
    }
    .header .head_bottom .search_box input::-webkit-input-placeholder {
        font-size: 16px;
    }
    .header .head_bottom .search_box input:-moz-placeholder {
        font-size: 16px;
    }
    .header .head_bottom .search_box input::-moz-placeholder {
        font-size: 16px;
    }
    .header .head_bottom .search_box input:-ms-input-placeholder {
        font-size: 16px;
    }
    .m_nav_pop ul li a {
        font-size: 14px;
        line-height: 38px;
    }
    .news_slide,
    .newswork_section,
    .quick_section,
    .news_tab,
    .exhibition_section {
        float: none;
        width: 100%;
    }
    .news_slide,
    .news_slide .swiper-slide img {
        height: 313px;
    }
    .newswork_section {
        margin-top: 10px;
    }
    .section_title .more img,
    .section_title3 .more img{
        top: -2px;
    }
    .news_tab .hd li .more img{
        top: -1px;
    }
    .news_list {
        margin-top: 5px;
    }
    .news_list li {
        padding: 5px 0;
        height: auto;
        font-size: 14px;
    }
    .news_list li a {
        max-width: 80%;
    }
    .news_list li .time {
        font-size: 12px;
    }
    .quick_section {
        margin-top: 3px;
    }
    .section_title2 {
        margin-bottom: 10px;
    }
    .quick_list li,
    .quick_list2 li {
        margin: 10px 5px;
        height: 85px;
    }
    .quick_list li .icon_box,
    .quick_list2 li .icon_box {
        width: 40px;
        height: 40px;
    }
    .quick_list li p,
    .quick_list2 li p {
        font-size: 14px;
    }
    .section.three {
        margin-top: 12px;
    }
    .footer {
        padding: 25px 0;
    }
    .footer .w1200 {
        display: block;
        width: 81%;
    }
    .footer .footer_link {
        margin-bottom: 10px;
        width: 100%;
        padding: 10px 8px;
    }
    .footer .footer_link .item_link {
        padding: 0 7px;
    }
    .footer .footer_link .item_link a {
        font-size: 12px;
    }
    .footer .footer_copyright {
        margin-left: 0;
        margin-bottom: 10px;
        padding: 5px 10px;
        width: 100%;
    }
    .footer .footer_copyright .item_cont {
        padding: 8px 0;
    }
    .footer .footer_copyright p {
        font-size: 12px;
    }
    .footer .footer_copyright p:first-child {
        margin-bottom: 5px;
    }
    .footer .footer_wechat {
        margin-left: 0;
        padding: 12px 0;
        width: 100%;
        display: flex;
        flex-direction: row;
        justify-content: center;
        align-items: center;
    }
    .footer .footer_wechat img {
        width: 72px;
        height: 72px;
    }
    .footer .footer_wechat p {
        font-size: 12px;
    }
    .backtop {
        right: 40px;
        bottom: 70px;
        width: 40px;
        height: 40px;
    }
    .backtop a {
        width: 40px;
        height: 40px;
    }
    .backtop i {
        background-size: 15px;
    }
    .introduction_title h6 {
        margin-bottom: 9px;
        font-size: 18px;
        line-height: 19px;
    }
    .introduction_text {
        margin-top: 30px;
    }
    .introduction_text,
    .introduction_text p {
        font-size: 12px;
        line-height: 1.5;
    }
    .first_list li {
        padding: 4px 0;
        font-size: 14px;
    }
    .first_list li a {
        max-width: 85%;
    }
    .first_list li .time {
        font-size: 12px;
    }
    .pages .form {
        display: none;
    }
    .pages .pagination li.prev,
    .pages .pagination li.next {
        width: 48px;
    }
    .pages .pagination li {
        margin: 0 3px;
        font-size: 12px;
    }
    .TextTitle h5 {
        font-size: 16px;
        line-height: 1.5;
    }
    .quick_nav li {
        float: none;
        margin-bottom: 12px;
        width: 100%;
    }
    .quick_nav li:last-child {
        margin-bottom: 0;
    }
    .objection_item {
        margin-bottom: 15px;
        width: 100% !important;
    }
    .objection_item .item_tit {
        float: none;
        width: 100%;
        text-align: left;
    }
    .objection_item .item_cont {
        margin-left: 0 !important;
        width: 100% !important;
    }
    .objection_item.two {
        margin-left: 0;
    }
    .objection_item.two .item_tit {
        margin-bottom: 10px;
        width: 100%;
    }
}