/* -----------------------------------------------------------------



The Whole CSS written by Elecom.

(C) Elecom Inc.

Annoucement here,Copyright

Shenzhen.Eleccom Technology.使用原代码请联系作者QQ: 2300184378 / 2017-04-09 20:00:06



---------------------------------------------------------------------------------------*/



#elecom_nav {}
.nav-list li { float: left; margin-right: 30px; font-size: 16px}
.nav-list li a { line-height: 80px; font-size: 16px; color: rgba(255,255,255,0.8)}
.nav-list li a:hover { color: #1989fa !important}
.nav-list li a.a { color: #1482f0}
.nav-list li a em { display: inline-block;
    width: 6px;
    height: 6px;}
.nav-list li a.a em { display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    margin-right: 6px;
    background-color: #1482f0;
    vertical-align: middle;
    opacity: 1;}
.sticky-wrapper { float: left; width: 60px}

.top_tag { display: block !important}

.Framebox2 { padding: 10px 0}

.pgs { padding: 30px 0 0 0; background: #FFFFFF}

blockquote {

    border: none;

    margin: 0;

    padding: 25px 30px;

    background-color: #F5F5F5;

    display: block;

    font-size: 16px;

    line-height: 23px;

}

.text-remarks {

    color: #999;

    line-height: 30px;

}

.text-big-title {

    font-size: 20px;

    font-weight: 700;

    color: #a41d1d;

}





/* 文章列表页/List */



.mbox_list{margin:0;padding:30px 0;border-bottom:1px solid #F0F0F0 !important}

.mod_art_list h3{ height: 25px; line-height:25px;font-weight:400;margin:0;overflow:hidden}

.mod_art_list h3 a{font-size:19px;color:#474E5D;font-weight:bold}

.mod_art_list h3 a:hover{color: #ed0000;text-decoration:underline}

.mod_art_list_pic{float:left; width: 220px; margin-right:20px;height:140px;overflow:hidden}

.mod_art_list_pic img{width:220px;min-height:140px}

.mod_art_list_simple{margin:0;height: 46px;line-height:23px;font-size:14px;color: #667086;overflow:hidden}

.colorlink{color:#62BAE4!important;font-weight:400}

.ie7 .colorlink{float:left}

.mod_art_list_info{height:25px;line-height:25px;margin:15px 0 10px 0;font-size:14px;color: #667086}

.mod_art_list_info .author1 img{width:25px;height:25px;margin-right:10px;border-radius:50%;vertical-align:middle}

.mod_art_list_info a{float:left;display:inline-block;color: #667086}

.mod_art_list_info span{float:left}

.s_view{float:left;height:15px;width:15px;background:url(../comment.png) no-repeat 0 0;margin:6px 5px 0 0;overflow:hidden}

.ie7 .s_view,.ie8 .s_view{padding-top:8px}

.mod_art_list .pipe{display:inline-block;width:7px;height:7px;margin:0 10px;font-family:serif,Tahoma,Arial,sans-serif}

.ie7 .mod_art_list .pipe{float:left}

.icon16link{margin-left:15px}



/* end */





a:hover { text-decoration: none}

.inside_box { background: none}

.middle_info { margin: 0; border-radius: 0; box-shadow: none; background: #FFFFFF}



.card { top: 305px; left: 260px; background: #FFFFFF}

.card .p_opt { padding: 10px}



.ct2 .mn { width: 786px; padding: 15px 0 0 0; border-radius: 0; background: #FFFFFF; box-shadow: none}

.ct2 .sd { float: right; width: 314px; padding: 0; border-radius: 0; background: #FFFFFF; box-shadow: none; overflow: visible}



.pren { padding: 0 0 5px 0 !important; font-size: 13px}

.pren .z { width: 330px; text-overflow: ellipsis; white-space: nowrap; overflow: hidden}

.pren .y { max-width: 330px; text-overflow: ellipsis; white-space: nowrap; overflow: hidden}



.bm_h{ background:none;border-bottom: 3px solid #F4F4F4;height: 36px;line-height: 36px;}

.bm_h h2{float: left;font-size: 16px;font-weight: 700;}



.bm{ border:none;}

.bm_c{ padding:0;}



.mod_art_list_content { height: 120px; margin-left: 240px}



.mod_art_list { position: relative; height: 140px; color: #777777; border-bottom: 0; background: #FFFFFF}





.list_box { margin-bottom: 15px}

.span-mark { display: none}

.span-mark-author { border-bottom: 0; top: -5px !important}



.tit01 .rss {margin-right: 10px;margin-top: 5px;padding-left:30px;background: url(../rss.png) no-repeat 0 45%;}

.tit01 .add{margin-right: 10px;margin-top: 5px;padding-left:30px;background: url(../add.png) no-repeat 0 45%;}

.tit01 h1, .tit01 h2, .tit01 h3, .tit01 h4 { color: #555555}

.tit_top { width: 100%; height: 22px; line-height: 22px; padding: 0; margin: 0; border-bottom: 0; overflow: hidden; background: #FFFFFF}

.tit_top h3 { float: left; padding-bottom: 0; margin: 0; font-size: 20px; color: #474e5d; font-weight: bold; background: none}

.tit_top .post { display: block; width: auto; height: 25px; line-height: 25px; padding: 0 0 0 30px; margin: 0; color: #666666; font-size: 13px; background: none}





.portal_sort { margin-top: 10px}

.portal_sort ul { width: 290px}

.portal_sort li { float: left; width: 128px; padding: 0; margin: 0 10px 10px 0; text-align: center}

.portal_sort li a { height: 38px; line-height: 38px; text-decoration: none; padding: 0; display: block; font-size: 16px; color: #0c7ff2; text-align: center; border: 0; overflow: hidden; font-weight: bold; background: #F3F3F3}

.portal_sort li a:hover { color: #ee5b2e}





.special .spe_list {overflow:hidden;} 

.special .spe_list li{width: 250px;height: 26px;line-height: 26px;padding-left: 10px;float: left;background: url(../bgtit.png) no-repeat -493px -57px;overflow: hidden;}





.contacts { float: right; padding: 10px 0; text-align: right}

.contacts a { margin-left: 10px; color: #CCCCCC}

.contacts a:hover { color: #62BAE4}





/* 文章内页 */



#nv_portal .vw .h, #nv_portal .vw .s, #nv_portal .vw .d, #nv_portal .vw .o, #nv_portal .vw .pren, #nv_forum .vw .h, #nv_forum .vw .s, #nv_forum .vw .d { margin-left: 0; margin-right: 0}



.avatar_left { float: left; width: 30px; margin: 0 10px 0 0}

.avatar_left img { width: 32px; height: 32px; border-radius: 50%}

.avatar_right { float: left; width: 670px; line-height: 30px}



.vw .hm { text-align: left; padding: 0 0 15px 0 !important; border-bottom: 1px dotted #D8D8D8 !important}

.vw .ph { line-height: 36px; padding: 0 0 15px 0; font-size: 26px; color: #222222; font-weight: bold; text-align: left}

.h .xg1, .h .xg1 a { color: #888888 !important}

.vw .h { position: relative; padding: 0 0 25px 0 !important; margin: 0; border-bottom: 0 !important; border-radius: 0}

.vw .h p { width: 100%; float: left; height: 30px; line-height: 30px}

.vw .s{border: 1px solid #F9F9F9;background:#f1f6f8; padding:10px; margin: 10px auto}

.vw .s strong { color: {ALLCOL}}

.vw .s { color: #666666}

.vw .d { color: #333333; margin: 0 0 30px 0; font-size: 16px; line-height: 30px}

.vw .d img { max-width: 100%; margin-bottom: 0}

.vw .d p { margin-bottom: 0}

.forum_hd { padding-bottom: 10px}

.vwtb { height: auto}



.contact a{color:red}

.pipe{margin:0 3px}

.vw .h span{line-height:30px}

.focus_num{float:left;display:block;height:22px;line-height:22px;color:#BBB;font-size:14px;padding:0 0 0 20px;margin-left:20px;background:url(../star.png) no-repeat 0 6px}

.authors{line-height:22px;font-size:16px;color:#BBB}

.authors a{float:left;font-size:14px;margin-top:0;font-weight:400;color:#BBB;height:22px;line-height:22px;background:0 0;padding:0;margin:4px 0 0 0}

.dates{padding:0 0 0 18px;color:#ADADAD;background:url(../date.png) no-repeat left 7px}

.msg_caption{width:60px;padding:0}

.msg_caption span{display:block;width:20px;height:22px;margin:8px 0 0 15px;float:left;background:url(../msg_caption.png) 0 0 no-repeat;text-indent:-9999px;cursor:pointer}

.msg_caption .bigger{background-position:-85px 4px}

.msg_caption .bigger:hover{background-position:-28px 4px}

.msg_caption .smaller{background-position:1px 4px}

.msg_caption .smaller:hover{background-position:-56px 4px}

#nv_portal .vw .pren em{width:100%;margin:0 0 5px 0;display:block;height:24px;line-height:24px;overflow:hidden;color:#999}

#nv_portal .vw .pren em a{color:#999}

#nv_portal .vw .pren em a:hover{color:#62BAE4}

#nv_portal .vw .pren em .i_prev{float:left;height:18px;width:10px;padding:0;margin:5px 6px 0 0;background:url(../pages2.png) repeat -14px -8px}

#nv_portal .vw .pren em .i_next{float:left;height:18px;width:10px;padding:0;margin:5px 6px 0 0;background:url(../pages2.png) repeat -35px -35px}

#nv_portal .vw .pren em.y{float:left}

#related_article .bm_c{padding:20px;margin:30px 0 0 0;border:1px solid #F0F0F0;background:#F9F9F9}

#related_article .xl2 li{width:42%;height:33px;line-height:33px;font-size:14px;margin:0 50px 0 0;white-space:nowrap;text-overflow:ellipsis}

#related_article .xl2 li a{color:#888}

.mls .avt{width:50px;margin-right:10px}

.mls .avt img{width:50px;height:50px;padding:0;vertical-align:top;border-radius:5px;border:0}

.moquu_wxad{text-align:center;width:100%;height:150px;margin-top:20px;background:#F7F7F7}

.moquu_tags{height:85px;margin-top:18px;padding-left:25px}

.moquu_tags p{line-height:30px;font-size:14px;padding-left:0;color:#8C8B8B}





/* 表态动作 */



.atd .num em { font-size: 16px}

.atdc div { display: none}



/* add */



.vw .o { border: 0}

.oshr { -moz-border-radius: 0;-webkit-border-radius: 0;border-radius: 0; border:1px solid #CDCDCD}



#click_div .mbm.xs1, #click_div #trace_div { display: none}

.atd .atdc { display: none}

.infos { display: none !important; position:fixed;left: 50%; top:20%;margin-left: -620px; width: 48px; overflow:hidden;border: 0;z-index:1001;-webkit-border-radius: 0 0 0 3px;border-radius: 0 0 0 3px}

.ie7 .infos { display: none}

.infos .recommend { display: block; width: 34px !important;height: 25px !important;line-height: 16px;margin: 0 auto 5px auto !important;padding: 0 !important;float: none !important;cursor: pointer; background: url(../moquu_gd.jpg) no-repeat 0 0 !important}

.s_reply{float:left;height:17px;width:18px;background-image:url(../write.png);margin:0 5px 0 0;background-position:0 0; display: none}

.s_reply:hover, .reply1 a:hover .s_reply { background-image:url(../write2.png)}

.reply1 a:hover { color: #62BAE4 !important}





/* 评论 */



.reply_box{ padding: 0; margin-top: 20px; border-radius:0;box-shadow:none;background: none}

.comment_box{padding: 0 0 20px 0}

.top_in{font-family:"Helvetica Neue",Arial,"Hiragino Sans GB",STHeiti,"Microsoft Yahei",SimSun,"WenQuanYi Micro Hei",sans-serif}

#comment{margin:15px 0 0 0;border-radius:0;box-shadow:none;background:#FFF}

#comment .comment_tit{padding:0;margin:0;border-bottom:0}

#comment .comment_tit a{padding:0;color:#333;height:50px;line-height:50px;font-size:18px;float:left}

#comment .comment_tit strong{font-weight:400}

#comment .comment_tit a.on{background:#FFF none repeat scroll 0 0;margin-left:-1px;border-top:3px solid #666;color:#000;height:47px;line-height:44px;border-bottom:1px solid #F4F4F4}

#comment_ul{padding:0}

#comment_ul li{border-top:1px solid #F0F0F0;margin:0;padding:15px 0 15px 70px}

#comment_ul .commont_floor{float:right;padding-left:6px;margin-top:4px;font-size:14px;font-family:Arial;font-weight:700;color:#444}

#comment_ul li dd{font-size:14px;color:#555}

#comment_ul li p{color:#888}

#comment_ul li p a{margin-left:10px;color:#888}

#comment_ul .mbm{position:relative}

#comment_ul .portrait{position:absolute;left:-62px;top:0}

#comment_ul .portrait img{width:50px;height:50px;max-width:100%;vertical-align:top;border-radius:50%;box-shadow: none}

#comment_ul .username{margin-right:10px;color:#333;font-size:14px;font-weight: bold;font-family:"Helvetica Neue",Arial,"Hiragino Sans GB",STHeiti,"Microsoft Yahei",SimSun,"WenQuanYi Micro Hei",sans-serif}

#comment_ul .xg1,#comment_ul .xg1 a{color:#888!important}



/* end */









.cutline{float:left;height:13px;width:1px;margin:4px 10px 0 1px;background:#E6E6E6}

.comment_left{float:left;margin:0 10px 0 0}

.comment_right{float:left}

.ds-avatar img{display:block;width:50px;height:50px;max-width:none;box-shadow:0 1px 3px rgba(0,0,0,.22);border-radius:50%;transition:-moz-transform .4s ease-out 0s}

.tedt{margin:0 0 20px 0 !important;border:0;width: auto;border: 1px solid #e1e1e1;box-shadow:none;background: #FEFEFE}

.tedt .area{background: #F9F9F9}

.tedt .pt{width:688px;height:85px!important;padding:8px 10px!important;line-height:1.6;border:overflow: auto;vertical-align:middle;color:#999;box-shadow:none;resize:none;background:0 0}

.ptn{padding-top:15px!important}

.tedt_down{width: 100%;background:0 0}

.tedt_down .pn{float: right;font-family:"Helvetica Neue",Helvetica,Arial,sans-serif;height:32px;line-height:32px;width:85px;margin:0;color:#FFF;font-size: 14px;font-weight:400;border:0;overflow:hidden;box-shadow:none;transition:all .5s ease 0s; border-radius: 4px; background: #0c7ff2}

.tedt_down .pn:hover{background: #3897f8}

.ie7 .tedt_down .pn{border-left:0!important}

.tedt_down .px{height:15px;line-height:15px;margin-left:3px}



#click_div { display: none}



.page_contentbox{width:1120px;margin:25px auto 0 auto;background:#FFF}

.photo_com{width:100%;height:340px;background:url(../banner_guanyu.jpg) no-repeat top;background-size:100% 100%}

.content_upline{border-top:2px solid #0e79cc;text-align:center;color:#0e79cc;width:354px;margin:60px auto 0;padding-bottom:60px;position:relative;top:0;left:0}

.content_upline h2{font-size:28px;padding:10px 30px;background:#fff;position:absolute;top:-30px;left:50%;margin-left:-100px}

.content_text{color:#666;font-size:16px;line-height:40px;padding:0 80px}

.content_text p{padding-bottom:40px;text-indent:2em}

.line_one p{padding-bottom:0;text-indent:0}







.big2-pic,.big2-pic-right{position:relative;background-color:#F9F9F9}

.big-pic .back-img,.big2-pic .back-img{position:absolute;width:100%}

.big-pic img,.big2-pic img,.hot-article-img img,.mod-thumb img,.topic-content img{width:100%;-webkit-transition:all .5s ease-out;-moz-transition:all .5s ease-out;-ms-transition:all .5s ease-out;-o-transition:all .5s ease-out;transition:all .5s ease-out}

.big2-pic img{transition:all .5s ease-out}

.big2-pic:hover img{transform:matrix(1.04,0,0,1.04,0,0)}

.big-pic-content,.big2-pic-content{position:absolute;width:533px;height:300px;z-index:10;cursor:pointer;display:block}

.big2-pic,.big2-pic-content,.big2-pic-right{width:395px;height:270px;overflow:visible}

.big2-pic-right{width:385px}

.pull-left{float:left!important}

.pull-right{float:right!important}

.big2-pic-right .article-title{padding:20px 20px 10px 20px;font-size:18px;line-height:28px}

.big2-pic-right .article-title a{color:#333333}

.big2-pic-right .article-title a:hover{color:#62BAE4}

.big2-pic-right .article-author{position:relative;margin:30px 20px;border-top:1px solid #f0f0f0}

.big2-pic-right .article-author .mob-author{margin:10px 0}

.mob-author .author-face{position:absolute;width:25px;height:25px}

.mob-author .author-face img{width:100%;overflow:hidden;border-radius:25px}

.mob-author .author-name,.mob-author .time,.mob-author em{color:#bbb;line-height:24px;font-style:normal}

.mob-author .author-name{margin-left:36px}

.mob-sub{font-size:14px;color:#999;line-height:24px}

.t-h1{margin:0 30px;bottom:22px;position:absolute;word-break:break-all;font-size:24px;color:#fff}

.big2-pic-content .t-h1{word-break:inherit;font-size:18px;color:#fff;line-height:1.5;font-weight:400}

.big-pic::before,.big2-pic::before,.topic-content::before{content:"";position:absolute;width:100%;height:100%;z-index:1;opacity:1;-webkit-transition:all .3s ease;transition:all .3s ease;background:-webkit-gradient(linear,0 30%,0 100%,from(rgba(0,0,0,0)),to(#121515));background:-moz-linear-gradient(top,rgba(0,0,0,0),rgba(0,0,0,0),#121515);background:-ms-linear-gradient(top,rgba(0,0,0,0),rgba(0,0,0,0),#121515);background:-o-linear-gradient(top,rgba(0,0,0,0),rgba(0,0,0,0),#121515)}







.ry-list-wrap .ry-box{position:relative;width:370px;height:auto;margin-right:30px;float:left;margin-top:30px}

.ry-list-wrap .ry-box:hover{box-shadow:0 0 15px rgba(45,50,55,.3);-webkit-transform:translateY(-5px);-moz-transform:translateY(-4px);-ms-transform:translateY(-4px);-o-transform:translateY(-4px);transform:translateY(-4px)}

.ry-list-wrap .ry-box:hover .ry-content{border:1px solid #FFF}

.ry-mod-angle{position:absolute;left:-10px;height:24px;color:#fff;text-align:center;background-color:#f63756;line-height:24px;padding:0 10px;z-index:20;top:20px;font-size:14px}

.ry-mod-angle::after{content:" ";position:absolute;left:0;top:24px;width:0;height:0;border-top:6px solid #cd213d;border-left:10px solid transparent}

.ry-list-wrap .ry-box .pic-box{height:278px;overflow:hidden}

.ry-list-wrap .ry-box .pic-box .pic-content{position:absolute;width:370px;height:278px;background:-webkit-gradient(linear,0 50%,0 100%,from(rgba(0,0,0,0)),to(#121515));background:-moz-linear-gradient(top,rgba(0,0,0,0),rgba(0,0,0,0),#121515);background:-ms-linear-gradient(top,rgba(0,0,0,0),rgba(0,0,0,0),#121515);background:-o-linear-gradient(top,rgba(0,0,0,0),rgba(0,0,0,0),#121515)}

.ry-list-wrap .ry-box .pic-box .pic-content .number{position:absolute;bottom:20px;right:30px;color:#999}

.ry-list-wrap .ry-box .pic-box .pic-content .number span{font-size:20px;color:#62BAE4}

.ry-list-wrap .ry-box .ry-content{border:1px solid #F0F0F0;height:auto;padding:25px 30px 30px}

.ry-list-wrap .ry-box .ry-content .tit_x{font-size:18px;color:#333;line-height:28px;height:56px;overflow:hidden;margin:0}

.ry-list-wrap .ry-box .ry-content .author{color:#bbb;margin-top:10px}

.ry-list-wrap .ry-box .ry-content .author span{margin-right:20px}

.ry-list-wrap .ry-box .ry-content .pl-topic-wrap{padding:20px;margin-top:16px;background:#F9F9F9}

.ry-list-wrap .ry-box .ry-content .pl-box{margin-top:0;height:48px;color:#bbb;padding:0;line-height:24px;overflow:hidden}







.column-link-box{position:absolute;bottom:25px;right:2px;text-align:right}

.column-link{font-size:12px;color:#62BAE4;text-align:center;line-height:1;z-index:10;margin-left:20px}





/* 相关文章/About */



#related_article { display: none; padding-top: 30px}

#related_article h3 { color: #555555; font-size: 16px}

#related_article li { color: #666666}



/* end */





.recommended_news, .hotTopic_news, .hotAttention_news {

    border: 1px solid #ededed;

    border-top: 3px solid #3d455f;

    margin-bottom: 20px;

    width: 100%;

    overflow: hidden;

}

.hotAttention_news .titx {

    font-size: 20px;

    width: 100%;

    height: 50px;

    background-color: #f6f6f6;

    line-height: 50px;

    text-align: center;

	color: #3d455f

}

.hotAttention_news .titx {

    background-color: #fff;

    font-size: 18px;

    height: 40px;

    line-height: 40px;

	font-weight: 400

}

.hotAttention_news .titx {

    background-color: #f6f6f6;

}

.hotAttention_news .titx em {

    color: #ed0000;

}

.hotAttention_news ul li {

    margin: 20px 10px;

    height: 50px;

}

.hotAttention_news ul li {

    margin: 20px 10px;

}

.hotAttention_news ul li span {

    float: left;

    font-family: Arial;

    width: 12%;

    font-size: 22px;

    color: #b4b4b4;

	text-align: center

}

.hotAttention_news ul li .reds {

    color: #ed0000;

}

.hotAttention_news ul li span {

    font-family: Arial;

    font-size: 20px;

}

.hotAttention_news ul li p {

    float: left;

    line-height: 25px;

    height: 50px;

    width: 88%;

    border-bottom: 1px solid #e5e5e5;

    padding-bottom: 6px;

	font-size: 14px

}

.hotAttention_news ul li p {

    border-bottom: 1px solid #e5e5e5;

    padding-bottom: 6px;

}

.hotAttention_news ul li:last-child p {

    border-bottom: none !important;

}

.hotAttention_news ul li p a {

    display: inline-block;

	text-decoration: none

}
.hotAttention_news ul li p a:hover { color: #0c7ff2}




#click_div .atd a { color: #555555; font-size: 14px}





.detailName {

    height: 220px;

    -webkit-background-size: cover;

    background-size: cover;

    background-position: center;

    width: 100%;

    background-repeat: no-repeat;

    margin-bottom: 30px;

}

.categoryBt {

    position: relative;

    overflow: hidden;

	text-align: center

}

.flex_box {

    display: -webkit-box;

    display: -moz-box;

    display: -ms-box;

    display: -o-box;

    display: box;

    display: -ms-flexbox;

    display: -webkit-flex;

    display: -moz-flex;

    display: -o-flex;

    display: flex;

}

.midCenter {

    -moz-box-pack: center;

    -moz-box-align: center;

    box-align: center;

    box-pack: center;

    display: -ms-flexbox;

    -ms-flex-pack: center;

    justify-content: center;

    -webkit-box-pack: center;

    -webkit-justify-content: center;

    -moz-justify-content: center;

    -ms-justify-content: center;

    -o-justify-content: center;

    -ms-flex-align: center;

    align-items: center;

    -webkit-box-align: center;

    -webkit-align-items: center;

    -moz-align-items: center;

    -ms-align-items: center;

    -o-align-items: center;

}

.categoryBt .second_nav_icon {

    position: absolute;

    left: 45px;

    top: 20px;

    z-index: 1;

    width: 68px;

    height: 68px;

    border-radius: 100%;

}

.categoryBt .second_nav_icon img {

    width: 35px;

}

.categoryBt .tag_name {

    position: absolute;

    left: 91px;

    top: 20px;

    color: #62BAE4;

    font-size: 18px;

    width: 100px;

    height: 100px;

    border-radius: 100%;

    padding: 0;

    margin: 0;

    -webkit-box-sizing: border-box;

    -moz-box-sizing: border-box;

    box-sizing: border-box;

    padding: 13px;

    z-index: 1;

}

.categoryBt .circle_icon {

    position: absolute;

    top: 10px;

    left: 45px;

}





.a_bg1 { width: 100%; height: 220px; background: url(../bg1.png) 50% no-repeat; background-size: cover}

.a_bg2 { width: 100%; height: 220px; background: url(../bg2.jpg) 50% no-repeat; background-size: cover}

.a_bg3 { width: 100%; height: 220px; background: url(../bg3.png) 50% no-repeat; background-size: cover}

.a_bg4 { width: 100%; height: 220px; background: url(../bg4.png) 50% no-repeat; background-size: cover}