.head-thumb {
    height: 340px;
    background: url("../img/video_bg.jpg");
    background-size: cover;
}
.trans * {
    transition: all .3s ease-out 0s;
    -moz-transition: all .3s ease-out 0s;
    -webkit-transition: all .3s ease-out 0s;
    -o-transition: all .3s ease-out 0s;
}

@media (max-width: 1000px) {
    .head-thumb {
        height: auto;
        line-height: 1;
    }
    .about-bottom-inner { width: 100%; }
}

a {
    color: inherit;
    text-decoration-line: none;
}

.about-main {
    padding-top: 60px;
    background: url("../img/about_bg.jpg") no-repeat right top;
}

.about-inner {
    width: 90%;
    min-width: 320px;
    max-width: 1440px;
    margin: 0 auto;
}
@media (max-width: 1460px) {
    .about-inner { width: 96%; }
    .about-bottom-inner { width: 96%; }
}

.about-main .article-title {
    font-size: 28px;
    line-height: 64px;
    color: #555;
    height: 64px;
    text-align: center;
}

.about-main .content {
    font-size: 14px;
    color: #666;
    max-width: 1160px;
    padding-top: 4px;
    padding-bottom: 46px;
    line-height: 28px;
    margin: 0 auto;
}

/* region ↓pic-frame↓ */
.pic-frame {
    display: flex;
    height: 510px;
    max-width: 1410px;
    margin-bottom: 60px;
}

.pic-frame .left {
    width: 31.9%;
    height: 510px;
    position: static;
}

.pic-frame .center {
    width: 50%;
}

.pic-frame .right {
    width: 18.1%;
}

.pic-frame .left .left-content {
    /*width: 278px;*/
    height: 278px;
    /*padding-top: 30%;*/
    position: relative;
    top: 25%;
    margin: 0 auto;
    z-index: 100;
    color: white;
}

.pic-frame .title {
    height: 36px;
    line-height: 36px;
    font-size: 18px;
}
.pic-frame .left .ens {
    height: 44px;
    line-height: 30px;
}
.pic-frame .left .description {
    font-size: 14px;
    line-height: 24px;
}

.pic-frame .center .title, .pic-frame .right .title {
    color: #333;
}
.pic-frame .center .ens, .pic-frame .right .ens {
    color: #999;
}

.pic-frame .left .bg-span {
    background: url("../img/leadership_speech.jpg") no-repeat center center;
    display: block;
    width: 100%; height: 100%;
    position: relative;
    left: 0; top: -278px;
    z-index: 1;
}

.pic-frame .left-content .description:after {
    content: "";
    width: 50px;
    height: 1px;
    background: #F0F6F6;
    position: absolute;
    left: 50%;
    bottom: 90px;
    margin-left: -25px;
    transition: all .3s ease-out 0s;
    -moz-transition: all .3s ease-out 0s;
    -webkit-transition: all .3s ease-out 0s;
    -o-transition: all .3s ease-out 0s;
}
.pic-frame .left:hover .description:after {
    width: 100px;
    margin-left: -50px;
}

.pic-frame .left-content .more {
    width: 96px;
    height: 32px;
    border: 1px solid #fff;
    margin: 75px auto 0 auto;
    background: url(../img/pic-frame-arrow.png) no-repeat center center;
}
.pic-frame .left .pf-link:hover .more {
    background-color: rgb(0, 129,62);
    border-color: rgb(0, 129,62);
}

.pic-frame .center .pf-container,  .pic-frame .right .pf-container{
    height: 50%;
}

.pf-container .content {
    width: 100%;
    padding-top: 12px;
    height: 178px;
    position: relative;
    top: 20%;
}

.pf-container .more {
    width: 96px;
    height: 32px;
    display: inline-block;
    border: 1px solid #333;
    margin-top: 42px;
    background: url(../img/black_white_arrow.png) no-repeat -55px center;
    position: relative;
}
.pf-container .more:after {
    content: "";
    width: 50px;
    height: 1px;
    background: #ADADAD;
    position: absolute;
    left: 50%;
    top: -35px;
    margin-left: -25px;
    transition: all .3s ease-out 0s;
    -moz-transition: all .3s ease-out 0s;
    -webkit-transition: all .3s ease-out 0s;
    -o-transition: all .3s ease-out 0s;
}

.pic-frame .pf-container.top .left {
    float: left;
    width: 36%;
    height: 100%;
}
.pic-frame .pf-container.top .right {
    float: right;
    width: 64%;
    height: 100%;
}

.pic-frame .pf-container.bottom .left {
    float: left;
    width: 64%;
    height: 100%;
}
.pic-frame .pf-container.bottom .right {
    float: right;
    width: 36%;
    height: 100%;
}

.pf-container.top .triangle {
    display: block;
    border-top: 10px solid transparent;
    position: relative;
    border-left: 9px solid #f5f5f5;
    height: 0px;
    width: 0px;
    border-bottom: 10px solid transparent;
    top: 50px;
    z-index: 1;
}
.pf-container.top:hover .triangle { border-left: 9px solid rgb(0, 129,62); }

.pic-frame .center .top .bg-span {
    background: url("../img/enterprise_vision.jpg") no-repeat center center;
    width: 100%;
    height: 100%;
    position: relative;
    top: -20px;
}

.pf-container.bottom .triangle {
    z-index: 10;
    display: block;
    float: right;
    border-top: 10px solid transparent;
    border-bottom: 10px solid transparent;
    border-right: 9px solid #f5f5f5;
    position: relative;
    top: 50px;
    right: 0;
}
.pf-container.bottom:hover .triangle {
    border-right: 9px solid rgb(0, 129,62);
}

.pic-frame .center .bottom .bg-span {
    background: url("../img/honorary_certificate.jpg") no-repeat center center;
    width: 100%;
    height: 100%;
    position: relative;
    top: 0;
}

.pic-frame .right .pf-container .triangle {
    border-left: 10px solid transparent;
    border-top: 9px solid #f5f5f5;
    position: relative;
    top: 0px;
    height: 0px;
    width: 0px;
    border-right: 10px solid transparent;
    z-index: 1000;
    left: 50%;
    display: block;
    bottom: -9px;
    margin-left: -5px;
}
.pic-frame .right .pf-link:hover .triangle {
    border-top: 9px solid rgb(0, 129,62);
}
.pic-frame .right .pf-link:hover .pf-container {
    background-color: rgb(0, 129,62);
}

.pic-frame .pf-link:hover .content {
    color: white;
}

.pic-frame .pf-link:hover .bg-span {
    transition: transform 0.5s;
    transform: scale(1.1);
}

@keyframes background-grow {
    from { background-size: cover; }
    to { background-size: 110% 110%; }
}

.pf-container:hover .more, .pic-frame .right .pf-link:hover .more {
    border-color: white;
    background: url(../img/black_white_arrow.png) no-repeat 40px center;
}

.pf-container:hover .more:after, .pic-frame .right .pf-link:hover .more:after {
    width: 100px;
    background: white;
    margin-left: 0;
    left: 0;
}

.pic-frame .right .bg-span {
    background: url("../img/social_responsibility.jpg") no-repeat center center;
    width: 100%;
    height: 100%;
    position: relative;
    top: -9px;
}

.pf-container {
    background-color: #f5f5f5;
    overflow: hidden;
}

.pf-container .left, .pf-container .right {
    overflow: hidden;
}

.pic-frame .left { overflow: hidden; cursor: pointer; }

.pic-frame .pf-container:hover {
    background-color: rgb(0, 129,62);
}
/* endregion ↑pic-frame↑ */

/* region ↓下方视频栏↓*/
.about-bottom {
    height: 352px;
    margin-bottom: 80px;
    background: url("../img/about-bottom-bg.jpg") no-repeat center top;
}

.about-bottom-inner {
    width: 90%;
    height: 100%;
    min-width: 320px;
    max-width: 1440px;
    padding: 0 15px;
    margin: 0 auto;
}
.about-bottom .video-pic-frame { position: absolute; }

@media (max-width: 576px) {
    .about-bottom .video-pic-frame { display: none; }
}

.about-bottom .play-pic-frame {
    width: 70px; height: 70px;
    background: url("../img/about-bottom-play.png") no-repeat;
    position: relative;
    left: 50%; top: 50%;
    margin-left: -35px;
    margin-top: -24px;
}

.about-bottom .description {
    width: calc(100% - 30px);
    position: relative;
    top: 50%;
    font-size: 15px;
    line-height: 24px;
    margin: 22px auto 0 auto;
    color: white;
}
/* endregion ↑下方视频栏↑ */