/* 页面顶部 */
.top_box {width: 100%;padding: 43px 0 0;}
.top_box .logo {width: 514px;height: 125px;}
.top_box .nav {width: 1200px;margin: 30px 0 0;height: 60px;}
.top_box .nav .item{width: 97px;height: 60px;position: relative;margin: 0 28px;}
.top_box .nav .item .t{font-size: 18px;color: #999999;}
.top_box .nav .item .x{width: 97px;height: 2px;background: #000000;position: absolute;left: 0;bottom: 0;display: none;}
.top_box .nav .item.cur .t{font-size: 18px;color: #000000;}
.top_box .nav .item.cur .x{display: block;}