@charset "utf-8";

.lt_bn {position:relative;overflow:hidden}
.lt_bn .bx-wrapper{height:auto;}
.lt_bn li {background-position:center center !important;background-size:cover;background-repeat:no-repeat; height:740px;/*height:100vh;text-align:center;*/color:#fff}
.lt_bn li:nth-child(3) .txt_wr .bn_subtit{display: none}
.lt_bn .bg{;position:absolute;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0);content:'';z-index:1;overflow:hidden}

.lt_bn .bn_txt {display:table;height:100%;width:100%;max-width:1200px;  margin: 0 auto; text-align:center; position:relative;z-index:2;}
.lt_bn .txt_wr {padding-top:200px;text-align: center; }


.lt_bn li .bn_tit {font-size:22px; font-weight:300; word-break:keep-all; opacity:0;
-webkit-transition: all 1s ease-in .3s;
-moz-transition:  all 1s ease-in .3s ;
-ms-transition:  all 1s ease-in .3s;
-o-transition: all 1s ease-in .3s;
transition: all 1s ease-in .3s}

.lt_bn li .active-slide .bn_tit {opacity:1;}

.lt_bn li .bn_detail{font-size:65px; line-height:85px; word-break:keep-all; font-weight:700; margin:30px 0 50px; opacity:0;
-webkit-transition: all 0.5s ease-in .5s;
-moz-transition:  all 0.5s ease-in .5s;
-ms-transition: all 0.5s ease-in .5s;
-o-transition: all 0.5s ease-in .5s;
transition: all 0.5s ease-in .5s}

.lt_bn li .active-slide .bn_detail {opacity:1}

.lt_bn li .bn_de_txt {font-size:24px; font-weight:300; word-break:keep-all; opacity:0;
-webkit-transition: all 1s ease-in .3s;
-moz-transition:  all 1s ease-in .3s ;
-ms-transition:  all 1s ease-in .3s;
-o-transition: all 1s ease-in .3s;
transition: all 1s ease-in .3s}

.lt_bn li .active-slide .bn_de_txt {opacity:1}

.lt_bn #bx_pager {position:absolute; bottom:80px;z-index:99; width:100%;  text-align:center;}
.lt_bn #bx_pager .pager_wrap {width:100%; max-width:1200px; margin:0 auto;}
.lt_bn #bx_pager .pager_wrap a {color:#fff;display:inline-block;padding:5px;line-height:20px;opacity:0.5; font-size:16px;}
.lt_bn #bx_pager .pager_wrap  span{display:inline-block;width:0;height:1px;background:#fff;vertical-align:top;margin-top:10px;margin-left:8px;
-webkit-transition: all 0.5s ease-in;
-moz-transition:  all 0.5s ease-in ;
-ms-transition: all 0.5s ease-in ;
-o-transition: all 0.5s ease-in ;
transition: all 0.5s ease-in }
.lt_bn #bx_pager .pager_wrap .active{opacity:1}
.lt_bn #bx_pager .pager_wrap .active span{width:20px}

@media (max-width: 1199px){
	.lt_bn .bn_txt  {padding:0 20px}
    .lt_bn #bx_pager  {padding:0 20px}
 }

 @media (max-width: 969px){
	.lt_bn .bx-wrapper, .lt_bn li {height:560px;    display: flex;  flex-direction: column;  align-items: center;  justify-content: center;;background-position: 65%!important;}
	
     .lt_bn .bg_red{width: 80%; height: 60%; margin: 0 auto; opacity: 0.9}
	.lt_bn .txt_wr {padding-top:180px;}
	.lt_bn li .bn_tit {font-size:19px; max-width:440px; margin: auto;text-align: center}
    .lt_bn li .bn_detail {font-size:45px; line-height:60px; margin:20px 0 30px;text-align: center}
	.lt_bn li .bn_de_txt {font-size:22px; max-width:440px; margin: auto;text-align: center}
    .lt_bn #bx_pager {bottom:60px;text-align: center;}
	.lt_bn #bx_pager .pager_wrap a {font-size:14px;}
 }

  @media (max-width: 639px){
	.lt_bn .bx-wrapper, .lt_bn li{height:360px;background-position: 65%!important;}
	
	.lt_bn .txt_wr {padding-top:120px;}
	.lt_bn li .bn_tit {font-size:15px; max-width:370px;}
    .lt_bn li .bn_detail {font-size:28px; line-height:38px; margin:10px auto 20px; max-width:370px;}
	.lt_bn li .bn_detail br {display:none;}
	.lt_bn li .bn_de_txt {font-size:16px; max-width:370px;}
    .lt_bn #bx_pager {bottom:30px; left:0;}
	.lt_bn #bx_pager .pager_wrap {padding:0 20px;}
	.lt_bn #bx_pager .pager_wrap a {font-size:12px;}
 }