.mainAboutCen { width: 100%; max-width: 1200px; position: relative; }
.mainAboutCen .left { width: 34.16667%; float: left; padding-right: 5%; box-sizing: border-box;}
.mainAboutCen .left .title { font-size: 44px; margin-bottom: 3.65854%; line-height: 1; margin-top: 17.56098%; position: relative; color: #000; }
@media screen and (max-width: 1200px) { .mainAboutCen .left .title { font-size: 36px; } }
@media screen and (max-width: 960px) { .mainAboutCen .left .title { font-size: 30px; } }
@media screen and (max-width: 640px) { .mainAboutCen .left .title { font-size: 24px; } }
.mainAboutCen .left .title:before { position: absolute; top: 0; left: 0; content: ''; width: 5px; height: 80px; margin-left: -18px; background: #000; overflow: hidden; }
.mainAboutCen .left p.text { font-size: 16px; line-height: 24px; color: #777; max-height: 96px; overflow: hidden; text-overflow: ellipsis; display: -webkit-box; -webkit-line-clamp: 4; -webkit-box-orient: vertical; }
.mainAboutCen .left .lm { color: #3074b3; position: relative; margin-top: 12.19512%; display: inline-block; }
.mainAboutCen .left .lm:before { position: absolute; top: 100%; left: 0; content: ''; width: 100%; height: 2px; background: #3074b3; }
.mainAboutCen .left .lm:hover:before { width: 0; }
.mainAboutCen .right { width: 65.8332999%; float: right; position: relative; box-sizing: border-box;}
.mainAboutCen .right .wrap {width: 100%;text-align: center;margin-top: 20%;position: absolute;top: 0;left: 0;}
.mainAboutCen .right .wrap .videoBtn { display: inline-block; width: 90px; height: 90px; text-align: center; text-transform: uppercase; background: #000; color: #fff; margin-bottom: 5.14706%; }
@media screen and (max-width: 960px) { .mainAboutCen .right .wrap a.videoBtn { width: 72px; height: 72px; } }
.mainAboutCen .right .wrap .videoBtn:before { font-size: 36px; color: #fff; display: block; width: 100%; height: 50px; margin-top: 10px; }
@media screen and (max-width: 960px) { .mainAboutCen .right .wrap a.videoBtn:before { font-size: 32px; margin-top: 5px; height: 40px; } }
.mainAboutCen .right .wrap p.text { color: #fff; line-height: 24px; }
.mainAboutCen:after, .mainAboutCen .right:before { content: ''; height: 100%; top: 0; position: absolute; }