.help_list{ width:100%; float:left}
.help_list ul{ width:100%; float:left; overflow:hidden; position:relative; border-bottom: 1px solid #413C46}
.help_list li{ width:100%; float:left; color:#fff; font-size:14px}
.help_list li .wen_box{ width:calc(100% - 32px); float:left; padding: 0 16px; line-height:42px; border-top: 1px solid #413C46; border-bottom: 1px solid #413C46; background: url(../images/bg.png) no-repeat right 18px; background-size: 50px 100px}
.help_list li .wen_box.down{ background-position: right -32px}
.help_list li .da_box{ width:calc(100% - 32px); float:left; padding: 10px 16px; line-height:24px; display: none}
.help_list li .wp_100{ width: 100%; float: left}
.help_list li .img{ width:100%; float:left; text-align: center; padding-top: 24px}
.help_list li .img img{ max-width: 100%}
.help_list li .pb_0{ padding-bottom: 0}