/* ===================石材工艺========================== */
.index4 { width:100%; background:#f9f9f9; margin:0px 0px 0px 0px; overflow:hidden; padding:0 0 70px 0}
.index4_content { padding-top:88px;}
.index4_content ul li{ position:relative; float:left; width:23.5%; margin-left:2%; margin-bottom:30px;}
.index4_content ul li:nth-child(4n+1){  margin-left:0}
.index4_content ul li span { width:88px; height:52px; line-height:52px; text-indent:0.5em; font-size:20px; display:block; position:absolute; left:0; top:20px; color:#fff; background:url(../images/icon6.png) no-repeat center center}
.index4_content ul li dl dd:first-child { width:100%; overflow:hidden;}
.index4_content ul li dl dd:first-child img { width:100%; display:block;}
.index4_content ul li dl dd:first-child+dd { font-size:25px; color:#333333;font-family: "Oswald-Bold"; margin:22px 0 10px;}
.index4_content ul li dl dd:last-child { line-height:1.5; color:#333333; font-size:15px;}
.index4_content ul { display: flex;flex-direction: row;flex-wrap: wrap;}
.index4_content ul li { flex: auto;}


@media only screen and (max-width: 1024px){	
       .index4 {   margin-top: 80px;  padding: 0 0 70px 0;}
	   .index4_content { padding-top:40px;}
       .t1 h3 {text-align: center;
               font-size: 36px;
               color: #333333;
               padding-top: 25px;}
}

@media only screen and (max-width: 768px){
    .index4_content ul li {   width:48.5%;   margin-left:3%;  margin-bottom: 30px;}
	  .index4_content ul li:nth-child(4n+1) { margin-left: 3%;}
	  .index4_content ul li:nth-child(2n+1) { margin-left:0;}
	  .index4_content ul li:first-child { margin-left:0 !important;}
	  .index4_content ul li dl dd:first-child+dd { font-size: 22px;}
	  .index4_content ul li dl dd:last-child{ font-size: 16px;}
	  .index4_content ul li span { font-size:16px;}
      .t1 h3 {  font-size:30px;}
	}

@media only screen and (max-width: 500px){
    .index4 {  margin-top:40px;}
	.index4_content ul li span { font-size: 12px;}
	.index4_content ul li span {width: 54px; height: 35px; line-height: 35px; background-size:100% !important}
	.index4_content ul li dl dd:first-child+dd { font-size: 18px;}
	.index4_content ul li dl dd:last-child {  font-size: 14px;}
	.index4_content ul li { margin-bottom:20px;}
	.index4 { padding: 0 0 40px 0;}
    .t1 h3 { font-size: 25px;}
}