body,div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,pre,code,form,fieldset,legend,input,button,textarea,select,option,p,blockquote,th,td{margin:0;padding:0;}
* {outline: 0 none;}
.clearfix:after{content:".";display:block;height:0;clear:both;visibility:hidden;}
ul li{list-style: none;}
a{color:black;outline:0 none;text-decoration: none;cursor:pointer;}
img{border:0;}

body{
    font-family: "PingFang SC", "Microsoft YaHei",Helvetica, Arial, sans-serif,"Source Han Serif";
    font-size: 14px;
}

.wrapper{
    width: 100%;
    margin: 0 auto;
    overflow: hidden;
}
.wrapper_main{
    width: 100%;
    margin: 0 auto;
}


/* banner */
.section_banner {
    background: #000;
    position: relative;
    height: 100vh;
}
.section_banner .swiper-wrapper,
.section_banner .swiper-container {
    height: 100%;
}
.section_banner .swiper-slide {
    overflow: hidden;
    height: 100%;
}

.section_banner .pic_box {
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    background-size: cover;
    background-position: 50%;
    -webkit-transition: -webkit-transform 0.6s ease, -webkit-filter .5s ease;
    transition: -webkit-transform 0.6s ease, -webkit-filter .5s ease;
    transition: transform 0.6s ease, filter .5s ease;
    transition: transform 0.6s ease, filter .5s ease, -webkit-transform 1s ease, -webkit-filter .5s ease;

    z-index: -1;
}
.section_banner .pic_box:after {
    content: "";
    display: block;
    height: 100%;
    width: 100%;
    /* background-color: rgba(0, 0, 0, 0.42); */
    z-index: 10;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 11;
}
.section_banner .swiper-slide-active .pic_box {
    -webkit-transform: scale(1) rotate(.001deg);
    transform: scale(1) rotate(.001deg);
}

.section_banner .text_box {
    display: table;
    width: 100%;
    height: 100%;
    position: relative;
    z-index: 2;
    padding-left: 80px;
    padding-right: 80px;
    box-sizing: border-box;
}
.section_banner .text_box .text_item{
    display: table-row;
    width: 100%;
    height: 50%;
}
.section_banner .text_box .text_item .text{
    display: table-cell;
    vertical-align: top;
    padding-top: 35px;
    box-sizing: border-box;
    padding-left: 230px;
}
.section_banner .text_box .text_item_title .text{
    vertical-align: bottom;
    padding-bottom: 35px;
    padding-top: 0;
}
.section_banner .text_box .text_item .text a{
    display: inline-block;
    cursor: pointer;
    position: relative;
    z-index: 99;
}

.section_banner .text_box .text_item .text p{
    display: inline-block;
    font-size: 30px;
    color: #fff;
    line-height: 40px;
    font-weight: 100;
    text-transform: uppercase;
    opacity: 0;
    position: relative;
}
.section_banner .text_box .text_item_title .text p{
    font-size: 52px;
    color: #fff;
    line-height: 62px;
    font-weight: 100;
    letter-spacing: 5px;

    position: relative;
}
.section_banner .swiper-slide-active .text_box .text_item .text p{
    animation: banner_text1 1.2s ease-out 0.7s forwards;
    -webkit-animation: banner_text1 1s ease-out 0.7s forwards;
}
.section_banner .swiper-slide-active .text_box .text_item_title .text p{
    animation: banner_text2 1.2s ease-out 0.5s forwards;
    -webkit-animation: banner_text2 1s ease-out 0.5s forwards;
}

@keyframes banner_text1 {
    0% {
        transform: translateY(-50px);
        opacity: 0;
    }

    100% {
        transform: translateY(0px);
        opacity: 1;
    }
}
@keyframes banner_text2 {
    0% {
        transform: translateX(-50px);
        opacity: 0;
    }

    100% {
        transform: translateX(0px);
        opacity: 1;
    }
}

.section_banner .circle_box {
    height: 180px;
    margin-top: -90px;
    margin-bottom: -90px;
    position: absolute;
    top: calc(50%);
    left: 0;
    width: 100%;
    opacity: 0;
    -webkit-transition: opacity .5s ease;
    transition: opacity .5s ease;
}
.section_banner .swiper-slide-active .circle_box {
    opacity: 1;
    -webkit-transition: opacity 0s ease;
    transition: opacity 0s ease;
}
.section_banner .circle_xian {
    height: 1px;
    background-color: hsla(0, 0%, 100%, .30);
    margin-top: 90px;
    -webkit-transform-origin: 0 0;
    transform-origin: 0 0;
    -webkit-transform: scaleX(0);
    transform: scaleX(0);
}
.section_banner .circle_xian:before {
    content: "";
    display: block;
    width: 5px;
    height: 1px;
    background: #efeeeb;
    margin-left: 165px;
    -webkit-transition: opacity .5s ease 2.5s;
    transition: opacity .5s ease 2.5s;
    opacity: 0;
}
.section_banner .swiper-slide-active .circle_xian {
    -webkit-transform: none;
    transform: none;
    -webkit-transition: -webkit-transform 2s ease 1.5s;
    transition: -webkit-transform 2s ease 1.5s;
    transition: transform 2s ease 1.5s;
    transition: transform 2s ease 1.5s, -webkit-transform 2s ease 1.5s;
}
.section_banner .swiper-slide-active .circle_xian:before {
    -webkit-transition: opacity .5s ease 3.5s;
    transition: opacity .5s ease 3.5s;
    opacity: 1;
}
.section_banner .circle_conter {
    width: 180px;
    height: 180px;
    position: relative;
    text-align: center;
    margin-top: -90px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: 80px;
}
.section_banner .circle_num {
    display: inline-block;
    vertical-align: middle;
}
.section_banner .circle_num .text{
    width: auto;
    height: auto;
    padding-bottom: 5px;
    box-sizing: border-box;
    font-size: 13px;
    color: #fff;
    line-height: 24px;
    text-align: center;
    letter-spacing: 2px;
    text-transform: uppercase;

    -webkit-transform: translate3d(0, 30px, 1px) rotate(6deg);
    transform: translate3d(0, 30px, 1px) rotate(6deg);
    opacity: 0;
    -webkit-transition: opacity .5s, transform 0 ease .5s;
    transition: transform 0 ease .5s, opacity .5s;
}
.section_banner .circle_num .text:last-child{
    padding-top: 5px;
    padding-bottom: 0;
}
.section_banner .swiper-slide-active .circle_num .text {
    -webkit-transition: opacity 0s linear 2.3s, transform 1.2s ease 2.3s;
    transition: transform 1.2s ease 2.3s, opacity 0s linear 2.3s;
    opacity: 1;
    -webkit-transform: translateZ(1px) rotate(.001deg);
    transform: translateZ(1px) rotate(.001deg);
}

.section_banner .circle_box svg {
    width: 180px;
    height: 180px;
    -webkit-transform: rotate(180deg);
    transform: rotate(180deg);
    position: absolute;
    top: 0;
    left: 0;
}
.section_banner .circle_box svg .circle__c1 {
    stroke-dasharray: 700;
    stroke-dashoffset: 700;
}
.section_banner .circle_box svg .circle__c2 {
    stroke-dasharray: 700;
    stroke-dashoffset: 700;
    -webkit-transition: stroke-dashoffset 1s ease;
    transition: stroke-dashoffset 1s ease;
}
.section_banner .swiper-slide-active svg .circle__c1 {
    stroke-dashoffset: 0;
    -webkit-transition: stroke-dashoffset 1s ease;
    transition: stroke-dashoffset 1s ease;
    -webkit-transition-delay: 2.5s;
    transition-delay: 2.5s;
}
.section_banner .swiper-slide-active svg .circle__c2 {
    stroke-dashoffset: 0;
    -webkit-transition: stroke-dashoffset 1s ease;
    transition: stroke-dashoffset 1s ease;
    -webkit-transition-delay: 2.5s;
    transition-delay: 2.5s;
}
.section_banner .swiper-slide-active svg {
    opacity: 1;
}

.section_banner .swiper-button-prev,
.section_banner .swiper-button-next {
    width: 60px;
    height: 60px;
    bottom: 50%;
    margin-top: -30px;
    opacity: 0.5;
}
.section_banner .swiper-button-prev {
    background: url(../images/about_section4_prev_icon.png) no-repeat center center;
    background-size: 60px;
    right: 80px;
    left: auto;
    margin-top: -80px;

}
.section_banner .swiper-button-next {
    background: url(../images/about_section4_next_icon.png) no-repeat center center;
    background-size: 60px;
    right: 80px;
    left: auto;
    margin-top: 20px;
}


.section_banner .swiper-pagination {
    z-index: 99;
    bottom: 60px !important;
}

.section_banner .swiper-container-horizontal>.swiper-pagination-bullets .swiper-pagination-bullet {
    margin: 0 8px;
}

.section_banner .swiper-pagination-bullet {
    position: relative;
    width: 60px;
    height: 2px;
    cursor: pointer;
    border-radius: 0;
    background: rgba(255, 255, 255, 0.38);
}

.section_banner .swiper-pagination-bullet::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 100%;
    background: #fff;
    z-index: 11;
}

.section_banner .swiper-pagination-bullet-active.swiper-pagination-bullet::before {
    animation: banAnimate 6s;
}

.section_banner .swiper-pagination-bullet:first-child.swiper-pagination-bullet-active::before {
    animation: banAnimate 8s;
}

@keyframes banAnimate {
    0% {
        width: 0;
    }

    100% {
        width: 100%;
    }
}




.index_banner_wrapper{
    height: 100%;
    margin: 0;
    padding: 0;
    overflow-y: hidden;
}
.index_banner_con{
    width: 100%;
    height: 100%;
    /* min-width: 1920px; */
    display: block;
    position: absolute;
    height: auto;
    bottom: 0;
    top: 0;
    left: 0;
}
.index_banner_con .container {
    width: 100%;
    height: 100%;

    background-repeat: no-repeat;
    background-size: cover;
    -webkit-background-size: cover;
    -o-background-size: cover;
    background-position: center 0;
    overflow: hidden;
}
.index_banner_con .title{
    width: 700px;
    height: 50px;
    position: fixed;
    top: 50%;
    left: 50%;
    margin-top: -50px;
    margin-left: -350px;
    font-size: 46px;
    color: #252525;
    line-height: 50px;
    text-align: center;
    font-weight: 100;
    letter-spacing: 2px;
    font-family: '宋体';
}



@media screen and (max-width: 768px){
    .section_banner .circle_conter{
        display: none;
    }
    .section_banner .text_box .text_item .text{
        padding-left: 15px;
        padding-right: 15px;
    }
    .section_banner .text_box .text_item .text p{
        font-size: 16px;
        line-height: 26px;
    }
    .section_banner .text_box .text_item_title .text p{
        font-size: 26px;
        line-height: 36px;
        letter-spacing: 1px;
    }
    .section_banner .text_box .text_item .text{
        padding-top: 25px;
    }
    .section_banner .text_box .text_item_title .text{
        padding-bottom: 25px;
    }
    .section_banner .circle_xian:before{
        margin-left: 22px;
        width: 10px;
    }



    .index_banner_con .container {
        /* background-size: 100%; */
        width: 2000px;
    }
    .index_banner_con .title{
        width: 300px;
        margin-left: -150px;
        font-size: 24px;
        letter-spacing: 0px;
    }



   
}