/* ------------banner---------------- */
.banner {
    width: 100%;
    position: relative;
}

.video_c {
    width: 100%;
}

.banner_ct {
    position: absolute;
    bottom: 360px;
    left: 96px;
    z-index: 1;
    font-size: 64px;
    color: white;
}

.banner_et {
    position: absolute;
    bottom: 308px;
    left: 96px;
    z-index: 1;
    font-size: 36px;
    color: white;
    letter-spacing: 2px;
}

.banner_btn {
    display: block;
    position: absolute;
    bottom: 160px;
    left: 96px;
    z-index: 1;
    width: 240px;
    height: 96px;
    line-height: 96px;
    text-align: center;
    border-radius: 48px;
    font-size: 24px;
    color: white;
    background-color: #ff6600;
    transition: all 300ms ease;
    cursor: pointer;
}

.banner_btn:hover {
    color: #ff6600;
    background-color: white;
}

/* ------------news---------------- */
.news_container {
    width: 86%;
    height: 1080px;
    margin: 0 auto;
    padding-top: 120px;
}

.news_container::after {
    display: block;
    content: "";
    visibility: hidden;
    clear: both;
}

.news{
    width: 80%;
    float: left;
    padding-right: 48px;
}

.news::after {
    display: block;
    content: "";
    visibility: hidden;
    clear: both;
}

.link_section {
    width: 20% ;
    float: right;
}

.header {
    position: relative;
}

.header p{
    font-size: 20px;
    color: rgb(60, 60, 60);
}

.header h2 {
    color: #ff6600;
    font-size: 40px;
    padding-bottom: 24px;
    float: left;
}

.header a {
    display: block;
    float: right;
    padding-top: 32px;
    color: rgb(160,160,160);
    transition: all 300ms ease;
}

.header a:hover {
    color: #ff6600;
}

.header_line {
    position: absolute;
    top: 4px;
    right: 0;
    width: 32px;
    height: 2px;
    background-color: #ff6600;
}

.header::after {
    display: block;
    content: "";
    visibility: hidden;
    clear: both;
}

.news_big {
    display: block;
    float: left;
    width: 60%;
    height: 720px;
    overflow: hidden;
    position: relative;
    background-size: cover;
    background-position: center;
    transition: all 300ms ease;
}

.image_text {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    color: white;
    background-color:#ff6600;
    padding: 24px;
    font-size: 24px;
    font-weight: 300;
}

.image_text span {
    font-size: 26px;
    color: white;
    padding-right: 24px;
}

.news_list {
    float: right;
    width:40%;
    padding-left: 24px;
}

.news_link li {
    width: 100%;
    height: 120px;
    padding: 16px;
    padding-top: 24px;
    border-bottom: 1px solid rgb(200, 200, 200);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all 300ms ease;
    position: relative;
}

.news_title {
    font-size: 24px;
    color: rgb(80, 80, 80);
    transition: all 300ms ease;
}

.news_time {
    color: rgb(200, 200, 200);
    text-align: right;
    position: absolute;
    right: 16px;
    bottom: 8px;
}

.news_link .detail {
    display: block;
    width: 100%;
    height: 100%;
    background-color: rgb(250, 250, 250);
    position: absolute;
    top: 0;
    transform: translate(-16px, 0);
    transition: all 300ms ease;
    border-bottom: 4px solid #ff6600;
    visibility: hidden;
    opacity: 0;
    white-space: normal;
    word-wrap: break-word;
    text-align: left;
    padding: 24px;
    padding-top: 36px;
}

.news_link li:hover .news_title {
    padding-left: 16px;
}

.news_link li:hover {
    height: 240px;
    border-bottom: 1px solid #ff6600;
}

.news_link li:hover .detail {
    visibility: visible;
    opacity: 1;
}

 .detail_time {
    font-size: 26px;
    color: #ff6600;
    margin-bottom: 24px;
 }

 .detail_title {
    font-size: 24px;
    color: rgb(80, 80, 80);
    margin-bottom: 8px;
    height: 64px;
    overflow: hidden;
 }

 .detail_content {
    font-size: 16px;
    color: rgb(160, 160, 160);
    height: 60px;
    line-height: 28px;
    overflow: hidden;
 }

.link_section ul li a {
    display: block;
    width: 100%;
    height: 132px;
    margin-bottom: 15px;
    background-color: rgb(248, 248, 248);
    background-image: url("../images/research_card@2x.png");
    background-size: cover;
    position: relative;
    transition: all 500ms ease;
    background-position: 0;
}

.link_section ul li:nth-of-type(2) a {
    background-image: url("../images/research_card2@2x@2x.jpg");
}

.link_section ul li:nth-of-type(3) a {
    background-image: url("../images/112233.jpg");
}

.link_section ul li:nth-of-type(4) a {
    background-image: url("../images/research_card4.jpg");
}

.link_section ul li:nth-of-type(5) a {
    background-image: url("../images/research_card5@2x@2x.jpg");
}

.link_section ul li a:hover {
    background-position: 10px;
}

/* ------------achievement---------------- */
.achievement {
    width: 86%;
    margin: 0 auto;
    padding-top: 32px;
    padding-bottom: 120px;
}

.achievement a {
    display: block;
    overflow: hidden;
    background-size: cover;
    background-position: center;
    position: relative;
    transition: all 300ms ease;
}

.achievement a p {
    position: absolute;
    color: white;
    font-size: 24px;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: rgba(0, 0, 0, .2);
    padding: 16px;
}

.achievement>a:hover {
    transform: scale(1.02, 1.02);
	box-shadow: 0px 0px 40px 10px rgba(0, 0, 0, .2);
    z-index: 1;
}

.achievement .ach_right a:hover {
    transform: scale(1.02, 1.02);
	box-shadow: 0px 0px 40px 10px rgba(0, 0, 0, .2);
    z-index: 1;
}

.ach_left {
    width: 50%;
    height: 640px;
    float: left;
    background-size: cover;
    background-position: center;
}

.ach_right {
    width: 50%;
    height: 640px;
    float: right;
}

.achievement::after {
    display: block;
    content: "";
    visibility: hidden;
    clear: both;
}

.ach_right a {
    width: 50%;
    height: 320px;
    float: left;
}

.ach_right::after {
    display: block;
    content: "";
    visibility: hidden;
    clear: both;
}

/* ------------foreword---------------- */
.foreword{
    width: 100%;
    padding: 120px 0;
}

.foreword_wrapper{
    width: 86%;
    margin: 0 auto;
}

.foreword_content{
    width: 50%;
    float: left;
}

.foreword_photo{
    float: right;
    width: 30%;
    height: 600px;
    background-image :url("../images/photo.jpg");
    background-size: cover;
    background-position: top center;
}

.foreword_wrapper::after{
    content:"";
    display: block;
    visibility: hidden;
    clear: both;
}

.foreword_title{
    font-size: 40px;
}

.foreword_p{
    font-size: 24px;
    padding: 40px 0;
    color: rgb(60, 60, 60);
    line-height: 40px;
    text-align: justify;
}

.signature {
    width: 120px;
    font-size: 24px;
    color: rgb(60, 60, 60);
    float: right;
}

.foreword_btn {
    transition: 500ms;
    text-align: right;
    margin-bottom: 80px;
}

.foreword_btn a {
    display: inline-block;
    background-color: #ff6600;
    color: rgb(250, 250, 250);
    width: 96px;
    height: 40px;
    border-radius: 20px;
    line-height: 40px;
    text-align: center;
    transition: all 300ms ease;
    position: relative;
}

.foreword_btn a:hover{
    background-color:rgb(250, 250, 250);
    color:#ff6600;
}

/*-------arrow----------*/
.arrow {
    width: 48px;
    height: 48px;
    border-radius: 24px;
    background-color: white;
    position: absolute;
    transition: all 500ms ease;
    bottom: 16px;
    right: 16px;
}

.achievement .arrow {
    top: 16px;
}

.arrow_line {
    width: 24px;
    height: 2px;
    background-color: #ff6600;
    position: absolute;
    top: 24px;
    left: 10px;
    transform: rotateZ(-45deg); 
}

.arrow::before {
    display: block;
    content: "";
    width: 16px;
    height: 2px;
    background-color: #ff6600;
    position: absolute;
    top: 15px;
    left: 16px;
}

.arrow::after {
    display: block;
    content: "";
    width: 2px;
    height: 16px;
    background-color: #ff6600;
    position: absolute;
    top: 15px;
    left: 30px;
}

.link_section ul li a:hover .arrow{
    background-color: #ff6600;
    transform: rotateZ(45deg);
}

.link_section ul li a:hover .arrow_line {
    background-color: white;
}

.link_section ul li a:hover .arrow::before {
    background-color: white;
}

.link_section ul li a:hover .arrow::after {
    background-color: white;
}

.achievement a:hover .arrow{
    background-color: #ff6600;
    transform: rotateZ(45deg);
}

.achievement a:hover .arrow_line {
    background-color: white;
}

.achievement a:hover .arrow::before {
    background-color: white;
}

.achievement a:hover .arrow::after {
    background-color: white;
}

@media screen and (max-width: 1366px) {
    .news_container {
        width: 1200px;
        height: 1080px;
        margin: 0 auto;
        padding-top: 120px;
    }

    .achievement {
        width: 1200px;
    }

    .foreword {
        width: 1200px;
    }
}