.clear::after {
    clear: both;
    display: block;
    content: " ";
}
.header {
    position: relative;
    box-shadow:0px 5px 30px 0px rgba(123,123,123,0.8);
}
.nav_bar {
    width: 660px;
    overflow: hidden;
    margin: 0 auto;
    float: left;
    color: white;
}
.nav_wrapper {
    width: 756px;
    position: absolute;
    top: 53px;
    left: 50%;
    transform: translateX(-50%);
}
.nav_btn {
    float: left;
    display: inline-block;
    margin-right: 90px;
    color: white;
    position: relative;
    font-size: 18px;
}
.nav_wrapper>.active>.btn_up {
    opacity: 1 !important;
}
.nav_wrapper>.active .btn_down {
    opacity: 0;
}
.nav_btn>.btn_up:not(.active) {
    opacity: 0;
    position: absolute;
    color: #0D7CFE;
    left: 50%;
    transform: translateX(-50%);
    transition: .2s all ease;
}
.nav_btn:hover:not(.active) .btn_up {
    opacity: 1;
    font-size: 20px;
}
.nav_btn:hover:not(.active) .btn_down {
    opacity: 0;
}
.logo {
    display: inline-block;
    float: left;
    margin: 33px 0 0 60px;
}
.logo>img {
    width: 203px;
    height: 54px;
}
.tel {
    margin: 42px 61px 0 0;
    color: white;
    float: right;
    font-size: 24px;
}
.tel>* {
    display: inline-block;
    float: left;
}
.tel>img {
    width: 34px;
    margin-right: 22px;
}
.tel>span {
    line-height: 34px;
}
.banner_wrapper {
    width: 100%;
    height: 940px;
    position: relative;
    top: 0;
    left: 0;
    z-index: -100;
}
.banner {
    background: url(../images/banner_1.png) no-repeat center;
    background-size:auto 100%; 
    width: 100%;
    height: 940px;
    /* position: relative;
    top: 0;
    left: 0;
    z-index: -100; */
    /* box-shadow: 5px 15px grey; */
}
article {
    margin: 0 175px;
    /* outline: 1px solid yellow; */
    padding: 100px 0 80px 0;
}
.main_title {
    width: 805px;
    margin: 0 auto;
    text-align: center;
}
.main_item_wrapper {
    cursor: pointer;
}
.main_title>img {
    width: 427px;
    display: block;
    margin: 0 auto;
}
.main_title>p {
    font-size: 30px;
    font-weight: 400;
    margin: 0 auto;
    position: relative;
    top: -20px;
}
.main_title>.line {
    height: 1px; 
    width: 500px;
    background: rgb(226, 226, 266);
    margin: 0 auto;
}
.main_title>.divider {
    width: 100px;
    height: 6px;
    background: #0D7CFE;
    position: relative;
    top: -3px;
    margin: 0 auto;
    box-shadow:0px 5px 10px 0px rgba(13,124,254,0.5);
}
.main_title>.main_info {
    padding-top: 32px;
    color: #808080;
    margin: 0 auto;
    font-weight: 400;
    line-height: 30px;
}
/* .item_father {
    padding: 92px 0 0 0;
    width: 1725px;
} */
.item_father {
    padding: 92px 0 0 0;
    width: 100%;
    display: flex;
    flex-flow: nowrap;
    justify-content: space-between;
    
}
.main_item {
    display: inline-block;
    width: 165px;
    /* outline: 1px solid black; */
    /* float: left; */
    text-align: center;
    /* margin-right: 180px; */
}
.main_item>img {
    width: 165px;
}
.main_item>.item_up {
    font-size: 18px;
    font-weight: 400px;
    margin-top: 30px;
}
.main_item>.item_down {
    margin-top: 10px;
    font-size: 12px;
    color: #B3B3B3;
}
/* .item_row {
    overflow: hidden;
    width: 1546px;
    margin: 0 auto;
} */
.item_row {
    margin: 10px 175px 20px 175px;
}
.case_item {
    user-select: none;
    width: 25%;
    float: left;
    position: relative;
    overflow: hidden;
}
.case_item:hover .case_info {
    /* top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    width: 100%; */
    opacity: 1;
    cursor: pointer;
    bottom: 0;
}
.case_item>img {
    transition: .3s all ease;
    width: 100%;
}
.case_item:hover img {
    transform: scale(1.3);
}
.case_item:hover {
    /* top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    width: 100%; */
    box-shadow:0px 4px 20px 0px rgba(0,78,169,0.6); 
    z-index: 10;
}
.case_info {
    background: rgba(0,0,0,.5);
    /* padding: 0 50px;
    width: 100%;
    height: 100%; */
    position: absolute;
    height: 35px;
    left: 0;
    bottom: -35px;
    right: 0;
    opacity: 0;
    color: #fff;
    text-align: center;
    transition: .3s all ease;
}
.case_info_main>p:nth-of-type(1) {
    font-size: 24px;
    font-weight:400;
    margin-bottom: 40px;
    /* margin-top: 100px; */
}
.case_info_main>p:nth-of-type(2) {
    font-size: 14px;
    line-height:30px;
    /* margin: 40px 50px; */
}
.case_info_main {
    position: absolute;
    left: 60px;
    right: 60px;
    top: 50%;
    transform: translateY(-50%);
}
.all_btn {
    background: rgb(247,251,255);
    position: relative;
    width: 100%;
    height: 277px;
    overflow: hidden;
}
.all_btn>.ball {
    border-radius: 50% 50%;
    position: absolute;
    display: inline-block;
    opacity: .2;
}
.view_all {
    width: 280px;
    height: 76px;
    border:1px solid rgba(13,124,254,1);
    border-radius:10px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    color: #0D7CFE;
    font-size: 20px;
    font-weight:400;
    line-height:73px;
    text-align: center;
    cursor: pointer;
    transition: .1s all ease;
    user-select: none;
}
.view_all:hover {
    background: #0D7CFE;
    color: #fff;
}
.his {
    margin: 0 100px;
    display: flex;
    justify-content: space-between;
}
.his_item {
    width: 330px;
    text-align: center;
    padding-top: 77px;
}
.his_item>img {
    width: 100px;
}
.his_item>p.counter {
    font-size: 65px;
    margin: 0;
}
.his_item>p:nth-of-type(2) {
    font-size:26px;
    font-weight:400;
    color:rgba(51,51,51,1);
    margin: 25px 0 39px 0;
}
.his_item>p:nth-of-type(3) {
    font-size:16px;
    font-weight:400;
    color:rgba(102,102,102,1);
    line-height:30px;
}
.about {
    background: url(../images/bg_mountain@2x.png) no-repeat center;
    background-size: 100% auto; 
    width: 100%;
    height: 560px;
    position: relative;
}
.about>img {
    width: 100%;
    display: none;
}
.about .img {
    width: 100vw;
    height: 400px;
    background: url(../images/line@2x.png) no-repeat center;
    background-size: 100% 100%; 
}
.img_modal {
    width: 0;
    overflow: hidden;
}
.about_btn {
    width: 280px;
    height: 76px;
    border:1px solid rgba(13,124,254,1);
    border-radius:10px;
    position: absolute;
    left: 50%;
    bottom: 48px;
    transform: translate(-50%, -50%);
    color: #0D7CFE;
    font-size: 20px;
    font-weight:400;
    line-height:73px;
    text-align: center;
    cursor: pointer;
    transition: .1s all ease;
    user-select: none;
}
.about_btn:hover {
    background: #0D7CFE;
    color: #fff;
}
.news {
    background: rgb(247,251,255);
    padding: 0 60px;
}
.news>section {
    display: flex;
    justify-content: space-between;
}
.section_item {
    width: 400px;
    height: 520px;
    background: #fff;
    padding: 34px 0 0 0;
    margin: 67px 0 61px 0;
    overflow: hidden;
    transition: .2s all ease;
}
.section_item>h2 {
    color: #808080;
}
.section_item>* {
    margin-left: 35px;
}
.section_item:hover {
    box-shadow:0px 6px 20px 0px rgba(0,78,169,0.3);
    z-index: 10;
}
.section_item>h2 {
    margin: 0 0 0 35px;
}
.section_item_time {
    margin: 13px 0 11px 35px;
    font-size:14px;
    font-weight:400;
    color:rgba(153,153,153,1);
}
.section_item_line {
    height:1px;
    background:rgba(230,230,230,1);
    margin: 0 35px 0 35px;
}
.section_item_title {
    margin: 10px 350x 9px 35px;
    font-size:18px;
    font-weight:400;
    color:rgba(51,51,51,1);
}
.section_item>img {
    width: 330px;
}
.section_item_article {
    font-size:14px;
    font-weight:400;
    color:rgba(128,128,128,1);
    line-height:24px;
    margin: 25px 35px 20px 35px;
}
.section_item_more {
    font-size:14px;
    font-weight:400;
    color:rgba(60,149,254,1);
    line-height:24px;
}
.deep {
    width: 100%;
    height: 384px;
    background: #F7FBFF;
    position: relative;
}
.deep_bg {
    background: url(../images/bg_hill@2x.png) no-repeat center;
    background-size: 100% auto; 
    width: 100%;
    height: 384px;
    
}
.deep_btn {
    width: 280px;
    height: 76px;
    border:1px solid rgba(13,124,254,1);
    border-radius:10px;
    position: absolute;
    left: 50%;
    top: 74px;
    transform: translate(-50%, -50%);
    color: #0D7CFE;
    font-size: 20px;
    font-weight:400;
    line-height:73px;
    text-align: center;
    cursor: pointer;
    transition: .1s all ease;
    user-select: none;
}
.deep_btn:hover {
    background: #0D7CFE;
    color: #fff;
}
footer {
    background: #1A1A1A;
    padding: 140px 0;
    margin: 0 auto;
    /* min-width: 1420px; */
    width: 1530px;
}
.footer_wrapper>div {
    /* float: left; */
}
.footer_wrapper {
    display: flex;
    justify-content: space-between;
}
.f_left {
    padding-right: 79px;
    border-right: 1px solid #2F2F2F;
}
.f_left>img {
    width: 293px;
}
.f_line {
    width: 1px;
    height: 159px;
    background: #2F2F2F;
}
.f_center {
    /* margin: 0 75px; */
    color: #fff;
    font-size: 18px;
    width: 585px;
}
.contact_item {
    width: 268px;
}
.contact_item>div {
    float: left;
    /* width: 50%; */
}
.f_icon {
    margin-right: 19px;
}
.f_num>p:nth-of-type(1) {
    margin: 0 0 21px 0;
}
.f_num>p:nth-of-type(2) {
    margin: 0;
}
.f_center>.f_center_wrapper {
    display: flex;
    justify-content: space-between;
}
.f_center>.f_center_wrapper:nth-of-type(2) {margin-top: 37px;}

.f_right {
    padding-left: 45px;
    color: #fff;
    font-size:16px;
    font-weight:400;
    text-align: center;
    border-left: 1px solid #2F2F2F;
}
.f_right>div {
    float: left;
    margin-left: 40px;
}
.f_right p {
    margin-top: 27px;
}
.beian {
    background: #141414;
    text-align: center;
    padding: 37px 0;
    font-size:14px;
    font-weight:400;
    color:rgba(255,255,255,1);
   
}
.beian>p {
    opacity:0.4;
}