.arrow_b{width:0;height:0;border-color:#183539 transparent transparent;border-style:solid;border-width:12px 12px 0}.arrow_r{width:0;height:0;border-color:transparent transparent transparent #183539;border-style:solid;border-width:12px 0 12px 12px}.arrow_b.large{border-width:14px 14px 0}.arrow_r.large{border-width:14px 0 14px 14px}