.top{background-color:#fff;border-bottom:1px solid #e5e5e5;height:95px}.top .logo img{display:block}.top .nav{margin-left:60px}.top .nav div.box-a{align-items:center;display:flex;flex-direction:column;font-size:1.2857142857rem;height:2em;margin-right:3vw;position:relative;white-space:nowrap;width:92px}.top .nav div.box-a.current a{color:#000}.top .nav div.box-a.current:after{border-bottom:3px solid #0aaff0;bottom:-10px;content:"";display:block;position:absolute;width:100%}.top .nav div.box-a:hover>.children{display:block}.top .nav div.box-a a{color:#555;display:inline-block;padding:5px;text-decoration:none}.top .nav div.box-a a .arrows{display:inline-block;font-size:1.2857142857rem;transform:rotate(90deg)}.top .nav div.box-a .children{background:#fff;display:none;font-size:1.2857142857rem;min-width:100%;padding-bottom:0;padding-top:1.8em;width:100%;width:270px;z-index:3}.top .nav div.box-a .children>div{color:#1f1f1f;padding:0;text-align:center;width:100%}.top .nav div.box-a .children>div a{background-image:url(/static/images/nav-children-bg-hover.png);background-repeat:no-repeat;border-top:1px solid #ddd;padding:20px 0;width:100%}.top .nav div.box-a .children>div a.current,.top .nav div.box-a .children>div a:hover{background-image:url(/static/images/nav-children-bg.png);background-repeat:no-repeat;background-size:100% 100%;color:#fff}.top .phone{color:#333;font-size:1.2857142857rem;font-weight:700;letter-spacing:0}.top .phone img{height:1.5rem;width:1.5rem}