body { font-size: 1.2rem;  margin: 0 auto !important; }
.header_nav{background-color:white}

.header_nav ul { overflow: hidden; width: 98%; margin: 0 auto; }

.header_nav ul li { float: left; width: 20%; margin-top: 1.5%; text-align: center; box-sizing: border-box; }

.header_nav ul li a { font-size: 1.2rem; font-family: Microsoft YaHei; font-weight: bold; color: #1f1f1f; }

.header_nav ul li p { width: 67%; padding-bottom: 1px; margin: 0 auto; }
.pad_t{padding-top: 8%; width:100%; }
.header_banner{margin:1px auto; width:100%; }