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768px){.observe{width:35%;height:203px;background:url(../img/guancha.png);background-size:contain;background-position:center;background-repeat:no-repeat;margin-top:40px}.doaj_three{width:85%;display:flex;flex-direction:row;align-items:center;justify-content:space-between}.list_boxsss{width:168px;position:absolute;left:69.35%;top:36px;box-shadow:0px 3px 6px -4px rgba(0,0,0,0.12);background:#f7f7f7;border:1px solid rgba(187,174,152,0.5);border-radius:2px;display:none}}@media (max-width: 768px){.observe{width:100%;height:203px;background:url(../img/guancha.png);background-size:contain;background-position:center;margin-top:40px}.doaj_three{width:100%;display:flex;flex-direction:row;align-items:center;justify-content:space-between}.list_boxsss{width:168px;position:absolute;right:0%;top:36px;box-shadow:0px 3px 6px -4px rgba(0,0,0,0.12);background:#f7f7f7;border:1px solid rgba(187,174,152,0.5);border-radius:2px;display:none}}.doaj_two{margin-top:61px;position:relative}.introduction_box{display:flex;flex-direction:row;align-items:center}.list_date{width:168px;height:34px;text-align:center;font-family:苹方-简;font-size:14px;font-weight:normal;line-height:32px;letter-spacing:0px}.list_date:first-child{margin-top:6px}.list_date:hover{color:#7e2827;background:#ededed}.doaj_lec{border:1px solid rgba(187,174,152,0.5);border-radius:2px}.qinghua{margin-bottom:40px}.introduction_left table tr{background:#fff !important}.introduction_left table tr th{font-family:PingFangSC-Regular;padding:0.75rem !important;font-size:14px;background:#fff !important;font-weight:normal;line-height:18px;letter-spacing:0px;color:#333}.introduction_left table tr td{font-family:PingFangSC-Regular;padding:0.75rem !important;font-size:14px;font-weight:normal;line-height:18px;letter-spacing:0px;color:#666}.introduction_left table tr:nth-of-type(odd){background-color:rgba(0,0,0,0.05) !important}