html,
body {
    font-family: "Helvetica Neue",
        Helvetica,
        "PingFang SC",
        "Hiragino Sans GB",
        "Microsoft YaHei",
        "微软雅黑",
        Arial,
        sans-serif;
    height: 100% !important;
    max-width: 1920px;
}

*,
:after,
:before {
    -webkit-box-sizing: border-box !important;
    -moz-box-sizing: border-box !important;
    -o-box-sizing: border-box !important;
    -ms-box-sizing: border-box !important;
    box-sizing: border-box !important;
}

.Container>.box1 {
    background: url('YKT_bg.jpg') no-repeat center;
    background-size: cover;
    height: 400px;
    position: relative;
}

.box1>.video_box {
    /*height: 271px;*/
    width: 520px;
    padding: 10px 10px;
    background: #1a73da;
    position: absolute;
    right: 350px;
    top: 50%;
    transform: translateY(-50%);
}

.box1>.video_box video {
    width: 100%;
    height: 100%;
}

.Container>.box2 {
    background: url('YKT_bg2.jpg') no-repeat center;
    background-size: cover;
    height: 322px;
    padding-top: 100px;
}



.box2 .list_box {
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    width: 1200px;

}

.box2 .list_box .list {
    background: url('./YKT_bg3.png') no-repeat center;
    background-size: contain;
    height: 94px;
    width: 33%;
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}

.box3 .title {
    font-size: 26px;
    font-weight: bold;
    margin: 50px auto;
    width: 1200px;
    padding-bottom: 30px;

    border-bottom: 1px solid #eee;

}

.box3 .title span {
    opacity: .4;
    color: #3C88F2;
    font-size: 22px;
    font-weight: bold;

}

.box3 .list_box {
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    width: 1200px;

}

.box3 .list_box .list {
    height: 160px;
    width: 49%;
    padding-top: 8px;
    padding-left: 180px;
    padding-right: 50px;
    text-align: left;
    cursor: pointer;
    font-size: 14px;
    margin-bottom: 40px;
    margin-right: 10px;
    font-size: 16px;
    letter-spacing: 1px;
}

.box3 .list_box .list:nth-child(1) {
    background: url('./YKT01.png') no-repeat 0 0;
    background-size: contain;
}

.box3 .list_box .list:nth-child(2) {
    background: url('./YKT02.png') no-repeat 0 0;
    background-size: contain;
}

.box3 .list_box .list:nth-child(3) {
    background: url('./YKT03.png') no-repeat 0 0;
    background-size: contain;
}

.box3 .list_box .list:nth-child(4) {
    background: url('./YKT04.png') no-repeat 0 0;
    background-size: contain;
}

.box4 {
    margin: 0 auto;
    width: 1200px;
    display: flex;
    justify-content: space-between;
    align-items: center;


}

.left_>.title,
.right_>.title {
    font-size: 26px;
    font-weight: bold;
    margin: 20px auto;
    padding-bottom: 30px;
    border-bottom: 1px solid #eee;
}

.box4 .title span {
    opacity: .4;
    color: #3C88F2;
    font-size: 22px;
    font-weight: bold;

}

.box4>.left_,
.box4>.right_ {
    width: 45%;
}

.right_>.list_box,
.left_>.list_box {
    display: flex;
    flex-direction: column;
    align-content: center;
    margin-bottom: 50px;
}

.right_>.list_box>.list,
.left_>.list_box>.list {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    padding: 12px;
    border-width: 1px;
    border-style: solid;
    border-color: rgba(198, 221, 244, 1);
}

.right_>.list_box>.list::before,
.left_>.list_box>.list::before {
    content: '';
    display: inline-block;
    height: 6px;
    width: 6px;
    margin-right: 20px;
    background: #000;
}

.right_>.list_box>.list+.list,
.left_>.list_box>.list+.list {
    margin-top: 16px;
}

.right_>.list_box>.list:hover,
.left_>.list_box>.list:hover,
.list:hover a {
    color: #2676FF !important;
    border-color: #2676FF !important;
    cursor: pointer;
}