@media(max-width: 768px){body{font-size:14px}}header{text-align:right;background-color:#fff;line-height:60px;position:sticky;z-index:1;top:0;box-shadow:0 0 3px rgba(0,0,0,.3)}header .company-name{margin:0 10px;font-weight:bold;color:#333;float:left;text-align:left}header .nav-item{display:inline-block;padding:0 10px;color:#666;font-weight:bold}@media(max-width: 768px){header{line-height:40px;font-size:14px}header .company-name{float:none}}.public-container{padding:0 10px;max-width:1200px;width:100%;margin:0 auto;overflow:hidden}.banner{height:600px;background:0% 45%/cover no-repeat;background-image:url(../img/guangzhou3.jpg);position:relative;filter:grayscale(0.22)}@media(max-width: 768px){.banner{height:280px}}h2{margin:30px 0;text-align:center;color:#a27d45}.block{margin:0 auto;padding:40px 0;font-size:20px;color:#000}.block p{line-height:1.8}@media(max-width: 768px){.block{min-height:250px;font-size:14px}}#about-us .content{display:flex}#about-us img{margin-left:20px;width:40%}@media(max-width: 768px){#about-us .content{display:block}#about-us img{display:block;margin:auto;width:80%}}.concat{text-align:center}.concat .content{display:flex}.concat .content .item{color:#666;flex:1}@media(max-width: 768px){.concat .content{display:block}}.footer{padding:20px 10px;background-color:#666;color:#fff;text-align:center}