.concept{margin-top:102px!important;padding:66px 0 214px;background-color:#f6f6f6}.concept_inner{width:740px;margin:0 auto}.concept_section{margin-top:40px}.concept_section:first-child{margin-top:0}.concept_title{text-align:center}.concept_lower-title{font-size:2.6rem;line-height:1.46;text-align:left;font-weight:700}.concept_text{font-size:2.6rem;line-height:1.46;text-align:left}.concept_title+.concept_text{margin-top:52px}.concept_lower-title+.concept_text{margin-top:15px}.concept_body{position:relative}.concept_trigger{position:absolute;right:0;top:100%;margin-top:92px!important}.concept_trigger>a{white-space:nowrap;text-indent:110%;overflow:hidden;position:relative;display:block;width:173px;height:45px;background:url(/kyousai/kokumin/campaign/hub-guide/img/concept_img04_sp.png) no-repeat center center/100% 100%}.concept_trigger>a::after,.concept_trigger>a::before{content:'';display:block;position:absolute;top:0;right:7px;bottom:0;width:31px;height:0;margin:auto 0;border-top:3px solid #fff;-webkit-transition:-webkit-transform .3s ease;transition:-webkit-transform .3s ease;transition:transform .3s ease;transition:transform .3s ease,-webkit-transform .3s ease;-webkit-backface-visibility:hidden;backface-visibility:hidden}.concept_trigger>a::after{-webkit-transform:rotate(90deg);-ms-transform:rotate(90deg);transform:rotate(90deg)}.is-expanded .concept_trigger>a::after{-webkit-transform:rotate(360deg);-ms-transform:rotate(360deg);transform:rotate(360deg)}.w640 .concept{padding:50px 0 180px}.w640 .concept_inner{width:590px}.w640 .concept_title img{width:410px}.w640 .concept_lower-title{font-size:2rem;line-height:1.46}.w640 .concept_text{font-size:2.08rem;line-height:1.46}.w640 .concept_title+.concept_text{margin-top:43px}.w640 .concept_trigger{margin-top:79px!important}.w640 .concept_trigger>a{width:139px;height:36px}.w640 .concept_trigger>a::after,.w640 .concept_trigger>a::before{width:23px;border-top:2px solid #fff}