.banner{width: 100%;margin: 0px auto;background: url(../img/op_manual/banner.jpg) center 0 no-repeat; height: 200px; overflow: hidden;}
.m_1{width: 100%;margin: 0px auto;background: #f8fafc;padding: 20px 0px; overflow: hidden;}
.m_1 .tab_nav{width: 1184px;margin: 8px; background: #fff;box-shadow: 0px 0px 5px rgba(0,0,0,0.2);border-radius: 4px; overflow: hidden;}
.m_1 .tab_nav li{float: left;line-height: 80px;font-size: 20px;width: 296px;text-align: center;cursor: pointer;}
.m_1 .tab_nav .curre{border-bottom: 2px solid #f00;}
.m_1 .tab_nav li:hover{border-bottom: 2px solid #f00;}
.m_1 .m1_cont{display: none;}
.m_1 .active{display: block;}
.m_1 .m1_cont{width: 100%;margin: 20px auto;overflow: hidden;}
.m_1 .m1_cont h2{text-align: center;font-size: 28px;line-height: 60px;font-weight: normal;}
.m_1 .m1_cont ul{margin: 20px auto;overflow: hidden;}
.m_1 .m1_cont ul li{width: 244px;float: left; margin: 8px;padding: 20px 20px 0px; height: 108px; overflow: hidden;}
.m_1 .m1_cont ul li .m1_li_left {width: 36px;float: left;background: url(../img/op_manual/hexagon_icon.png) 0 0 no-repeat; height: 31px;color: #f00;line-height: 31px;text-align: center; font-size: 20px;font-weight: bold; margin-top: 8px;}
.m_1 .m1_cont ul li .m1_li_right{width: 188px;float: right;}
.m_1 .m1_cont ul li h3{line-height: 30px;font-size: 20px;font-weight: normal;color: #333; overflow: hidden;white-space: nowrap; text-overflow: ellipsis;}
.m_1 .m1_cont ul li p{line-height: 20px;font-size: 14px;color: #999;display: -webkit-box; -webkit-box-orient: vertical;-webkit-line-clamp: 2; overflow: hidden;}
.m_1 .m1_cont ul li .jc_btn{display: none;}
.m_1 .m1_cont ul li .jc_btn a{color: #fff;}
.m_1 .m1_cont ul li .jc_btn i{display: inline-block;float: left;margin: 0px 10px;width: 16px;height: 16px}
.m_1 .m1_cont ul li:hover{background: #fff;box-shadow: 0px 0px 5px rgba(0,0,0,0.2); border-radius: 4px; overflow: hidden;}
.m_1 .m1_cont ul li:hover .jc_btn{width:100px;margin: 5px 0px 0px;background: #fa373f;border-radius: 4px;font-size: 14px;line-height: 16px;padding: 5px 0px;display: block;}