*{margin: 0;padding: 0;list-style: none;box-sizing: border-box;border: 0;}
a{text-decoration: none;}
._clear{clear: both;}
.xk_box{width: 80%;margin: 0 auto;}
p{font-size: 14px;line-height: 24px;color: #555;}
/* banner */
.xk_banner{width: 100%;position: relative;}
.xk_banner img{width: 100%;}
.xk_ban_tit{width: 80%;position: absolute;top: 40%;left: 10%;}
.xk_ban_tit h1{text-align: center;}
.xk_ban_tit h1 span{display: inline-block;border: 8px solid #dd1f2b;color: #dd1f2b;padding: 20px;font-size: 50px;line-height: 63px;}
.xk_ban_tit h3{color: #fff;font-size: 24px;line-height: 36px;text-align: center;margin-top: 20px;margin-bottom: 20px;}
.xk_ban_tit p{font-size: 18px;line-height: 30px;color: #fff;text-align: center;}
/* banner下面图片 */
.xk_ban_bot{background-color: #f5f5f5;margin-top: -5px;}
.xk_ban_bot img{width: 100%;}
.xk_ban_bot_left{float: left;width: 60%;padding-right: 10%;margin-top: 50px;margin-bottom: 50px;}
.xk_ban_bot_left h2,.xk_about h2,.xk_what h2{font-size: 30px;line-height: 40px;margin-bottom: 20px;color: #dd1f2b;}
.xk_ban_bot_left h4{font-size: 24px;line-height: 36px;color: #333;font-weight: normal;}
.xk_ban_bot_left p{font-size: 14px;line-height: 24px;color: #555;margin-top: 30px;}
.xk_ban_bot_right{float: left;width: 40%;margin-bottom: 50px;margin-top:0px;}
.xk_ban_bot_right img{width: 100%;}
/* 选矿相关 */
.xk_about{margin-top: 50px;}
.xk_about_left{float: left;width: 47.5%;margin-right: 5%;}
.xk_about_right{float: left;width: 47.5%;}
.xk_about h3{font-size: 24px;line-height: 36px;color: #333;font-weight: normal;margin-bottom: 20px;}
.xk_about p{margin-bottom: 15px;}
.xk_about ul li{font-size: 14px;line-height: 24px;color: #555;margin-bottom: 15px;font-weight: bold;}
.xk_about .xk_about_tit{width: 100%;font-size: 27px;line-height: 48px;color: #333;background-color: #f5f5f5;padding: 15px 0;text-align: center;margin-top: 30px;}
.xk_about .xk_about_img {margin-top: 30px;margin-bottom: 50px;width: 100%;}
.xk_about .xk_about_img li{float: left;width: 23%;margin-left: 2.5%;}
.xk_about .xk_about_img li:first-child{margin-left: 0;}
.xk_about .xk_about_img li img{width: 100%;}
/* 怎么做选矿 */
.xk_what{background: url(../images/what.png) no-repeat;padding-top: 30px;background-size: cover;}
.xk_what_info{font-size: 24px;line-height: 36px;color: #fff;margin-bottom: 30px;}
.xk_what ul li{float: left;width: 32%;margin-left: 2%;padding: 30px 20px;background-color: #fff;border-radius: 10px;}
.xk_what ul li:nth-child(3n+1){margin-left: 0;}
.xk_what ul li h3{font-size: 48px;line-height: 60px;height: 62px;color: #000;text-align: center;}
.xk_what ul li p{font-size: 16px;line-height: 30px;overflow: hidden;}
/* 矿种 */
.xk_ks{background-color: #f5f5f5;width: 100%;padding-bottom: 50px;}
.xk_ks ul{background-color: #fff;padding: 30px;}
.xk_ks h2{font-size: 36px;line-height: 66px;color: #333;font-weight: normal;text-align: center;margin: 0 0 30px;padding-top: 50px;}
.xk_ks ul li{float: left;width: 12%;margin: 0 1% 20px;}
.xk_ks ul li img{width: 100%;}
.xk_ks ul li span{text-align: center;width: 100%;display: block;color: #333;font-size: 18px;line-height: 28px;}
.xk_ks_but{display: block;width: 200px;height: 60px;background-color: #eaeaea;font-size: 18px;line-height: 60px;color: #333;text-align: center;margin: 30px auto 0;cursor: pointer;}
/* 案例 */
.xk_case{padding-top: 50px;}
.xk_case h2{font-size: 36px;line-height: 66px;color: #333;font-weight: normal;text-align: center;}
.xk_case p{font-size: 16px;line-height: 32px;color: #333;text-align: center;}
.xk_case p span{font-size: 22px;line-height: 32px;color: #333;font-weight: bold;}
.xk_case_left{float: left;}
.xk_case_right{float: right;}
.xk_case_img{width: 45%;margin-top: 50px;}
.xk_case_img img{width: 100%;}
.xk_case_arc{width: 50%;padding-top: 100px;border-bottom:2px solid #c9c9c9;}
.xk_case_arc h3{font-size: 22px;line-height: 36px;color: #333;}
.xk_case_arc p{font-size: 14px;line-height: 30px;color: #555;margin-bottom: 30px;text-align: left;}
.xk_case ul{margin-top: 50px;}
.xk_case ul li{float: left;width: 25%;margin-left: 5%;height: 60px;margin-bottom: 20px;}
.xk_case ul li:nth-child(3n){width: 40%;}
.xk_case ul li:nth-child(3n+1){margin-left: 0;}
.xk_case ul li a{font-size: 18px;line-height: 60px;display: block;height: 60px;background-color: #f5f5f5;color: #333;text-align: center;}
.xk_case_img1 img{margin-bottom: 20px;width: 100%;}
.xk_case_img1{width: 30%;margin-right: 2%}
.xk_case_img2{width: 68%;}
.xk_case_img2 img{width: 100%;}
.xk_case_img1,.xk_case_img2{margin-top: 30px;}
.xk_choose{margin-top: 50px;}
.xk_choose p{font-size: 14px;line-height: 24px;color: #555;text-align: left;}
.xk_choose h3{font-size: 24px;line-height: 24px;color: #333;font-weight: normal;text-align: center;margin-bottom: 20px;}
.xk_choose h2{font-size: 36px;line-height: 66px;color: #333;font-weight: normal;text-align: center;margin-bottom: 30px;}
.xk_choose ul li{float: left;width: 32%;margin: 0;margin-left: 2%;padding: 30px;background-color: #dcdcdc;border-radius: 5px;height: 350px;overflow: hidden;text-align: center;}
.xk_choose ul li:first-child{margin-left: 0;}
.xk_choose ul li img{max-width: 50%;}
.top_bg {
	background: url(../images/top_bg.jpg) repeat;
	height: 127px;
	padding: 38px 0 0;
	min-width: 1200px;
	width: 100%;
	position: relative;
	z-index: 10;
}
.header1 {
	width: 1200px;
	margin: 0 auto;
}
.logo1 {
	width: 195px;
	height: 195px;
	position: absolute;
	top: -38px;
	left: 560px;
}
.logo1 img {
	width: 195px;
	height: 195px;
}
.pr {
    position: relative;
}
.h_con {
	height: 67px;
	overflow: hidden;
}
.h_con .h_dw {
	float: left;
	line-height: 30px;
	font-weight: bold;
	font-size: 27px;
	color: #186060;
	padding: 15px 18px;
    font-family: "Microsoft YaHei";
}
.h_dw span {
	display: block;
	font-size: 16px;
	color: #666;
	font-weight: normal;
}
.h_con .tel {
	float: right;
	font-size: 22px;
	color: #666;
	padding: 0 0 10px 55px;
}
.tel i {
	font-size: 27px;
	font-weight: bold;
	display: block;
	color: #006060;
	padding: 15px 18px;
    font-family: "Microsoft YaHei";
}
.h_nav {
	height: 60px;
}
.h_nav li {
	height: 60px;
	line-height: 50px;
	float: left;
	background: url(../images/nav_bor.png) no-repeat right 20px;
}
.h_nav li a {
	font-size: 16px;
	color: #666;
	padding: 0 21px;
	display: block;
	float: left;
	height: 60px;
    font-family: "Microsoft YaHei";
}
.h_nav li a span{
	font-size: 16px;
	color: #666;
	display: block;
	float: left;
	height: 60px;
    font-family: "Microsoft YaHei";
}
.h_nav li a:hover, .h_nav li.cur a {
	font-weight: bold;
	color: #006060;
	background: url(../images/nav_line.gif) no-repeat center 57px;
}
.h_nav .nav_li05 {
	width: 300px;
	background: none;
}
.h_nav li:last-child {
	background: none;
}
em, i {
	font-style: normal;
}
.f_bg {
	background: url(../images/f_bg.gif) repeat-x;
	height: 410px;
	padding: 36px 0 0;
	overflow: hidden;
}
.footer {
	width: 1200px;
	margin: 0 auto;
}
.f_nav {
	height: 318px;
	overflow: hidden;
	padding: 0 0 0 5px;
}
.f_ul01 .f_li01 {
	float: left;
}
.f_ul01 li {
	width: 160px;
	float: left;
}
.f_ul01 li a {
	font-size: 18px;
	color: #fff;
	font-weight: bold;
	height: 60px;
	line-height: 60px;
	overflow: hidden;
	display: block;
}
.f_ul01 .f_ul02 li a {
	font-size: 14px;
	color: #929293;
	font-weight: normal;
	height: 30px;
	line-height: 30px;
}
.f_ban {
	height: 250px;
	padding: 0 0 0 50px;
	background: url(../images/f_line.gif) no-repeat;
}
.f_ban em, .f_er em {
	display: block;
	font-size: 18px;
	color: #fff;
	font-weight: bold;
	height: 60px;
	line-height: 60px;
	overflow: hidden;
}
.f_ban p {
	font-size: 14px;
	color: #929293;
	line-height: 44px;
	padding: 0 0 0 40px;
}
.f_p01 {
	background: url(../images/f_ico01.gif) no-repeat 0 10px;
}
.f_p02 {
	background: url(../images/f_ico02.gif) no-repeat 0 10px;
}
.f_p03 {
	background: url(../images/f_ico03.gif) no-repeat 0 10px;
}
.f_p04 {
	background: url(../images/f_ico04.gif) no-repeat 0 10px;
}
.f_er {
	height: 318px;
	padding: 0 0 0 75px;
	background: url(../images/f_line.gif) no-repeat;
}
.f_er p {
	width: 125px;
	text-align: center;
	float: left;
	padding: 0 20px 0 0;
}
.f_er img {
	width: 125px;
	height: 125px;
}
.f_er span {
	display: block;
	font-size: 14px;
	color: #929293;
	padding: 10px 0 0;
}
.f_bot {
	height: 60px;
	text-align: center;
	font-size: 14px;
	color: #7d7d7e;
	overflow: hidden;
	line-height: 30px;
}
.f_bot span {
	padding: 0 20px;
}
.f_bot a {
	font-size: 14px;
	color: #7d7d7e;
}
.g-nav a{ border-right:1px solid #0066cc;  border-top:1px solid #0066cc; border-bottom:1px solid #0066cc; 
 color:#0066cc; padding:2.5% 0; width:33.3%;  font-size:1.2rem;  font-weight: bold;
 text-align:center; display:block; float:left;box-sizing:border-box; -moz-box-sizing:border-box; -webkit-box-sizing:border-box; -o-box-sizing:border-box;
background: #0066cc; 
background: -moz-linear-gradient(top,  #fff 0%, #fff 100%); 
background: -webkit-linear-gradient(top,  #fff 0%,#fff 100%); 
background: linear-gradient(to bottom,  #fff 0%,#fff 100%);
}
.g-nav a:nth-child(4),.g-nav a:nth-child(5),.g-nav a:nth-child(6){
    border-top:none;
}
.g-nav a:nth-child(3n){border-right:none;}
/* 屏幕1200 */
@media (max-width:1200px) {
  .xk_ban_tit{top: 50px;}
}
/* 屏幕1024 */

@media (max-width:1024px) {
  .xk_ban_tit h1 span{font-size: 36px;line-height: 36px;}
  .xk_ban_tit h3{font-size: 18px;line-height: 24px;color: #333;}
  .xk_ban_tit p,.xk_case p,.xk_case p span{font-size: 14px;line-height: 18px;}
  .xk_case p span,.xk_choose h3{font-size: 16px;}
  .xk_ban_bot_left h2, .xk_about h2, .xk_what h2{font-size: 24px;line-height: 36px;}
  .xk_ban_bot_left h4,.xk_case_arc h3{font-size: 18px;line-height: 24px;}
  .xk_what ul li p,.xk_ks ul li span,.xk_choose p{font-size: 12px;line-height: 24px;}
  .xk_case ul li a{font-size: 12px;}
  .xk_choose h2{font-size: 24px;line-height: 48px;}

}
/* 768px */
@media (max-width:768px) {
  .xk_about_left,.xk_about_right{width: 100%;margin-right: 0;}
  .xk_about .xk_about_img li{width: 48%;margin-left: 4%;}
  .xk_about .xk_about_img li:nth-child(2n+1){margin-left: 0;}
  .xk_case_img,.xk_case_arc{width: 100%;}
  .xk_case_arc{padding-top: 10px;}
  .xk_choose ul li{width: 80%;margin: 30px 10%;height: auto;}
  .xk_choose ul li:first-child{margin: 30px 10%;}
  .xk_case_img1,.xk_case_img2{width: 100%;margin-right: 0;}
  .xk_what ul li{width: 48%;margin-left: 4%;}
  .xk_what ul li:nth-child(3n+1){margin-left: 4%;}
  .xk_what ul li:nth-child(2n+1){margin-left: 0;}
  .xk_ban_bot_left{width: 100%;padding-right: 0;}
  .xk_ban_bot_right{width: 100%;}
  .xk_case ul li{width: 100%;margin-left: 0;}
  .xk_case ul li:nth-child(3n){width: 100%;}
  .xk_ban_bot_left h4, .xk_case_arc h3{margin-bottom: 10px;}
  .xk_case_img{margin-top: 20px;}
  .xk_ban_tit{position: static;width: 100%;padding: 30px 10%;background-color: #f5f5f5;margin-top: -4px;}
  .xk_ban_tit h1 span{border: 2px solid #dd1f2b;font-size: 24px;}
  .xk_ks h2{font-size: 24px;line-height: 48px;}

}

/* 475px */
@media (max-width:475px) {
.xk_ks ul li{width: 23%;}
.xk_ban_tit p, .xk_case p, .xk_case p span{font-size: 12px;line-height: 18px;color: #333;}
.xk_what ul li{width: 100%;margin-left: 0;}
.xk_what ul li:nth-child(3n+1){margin-left: 0;}
.xk_ks .xk_choose ul li{width: 100%;}
.xk_about .xk_about_tit{font-size: 24px;line-height: 48px;}
}



/* 425px */

@media (max-width:425px) {
  .xk_choose ul li,.xk_choose ul li:first-child{width: 100%;padding: 10px;margin: 20px 0;}

}