*{margin:0;padding:0;box-sizing:border-box}select{color:#000}ul,ol{list-style:none}body,h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd{margin:0;padding:0}a{text-decoration:none;color:inherit}html,body{height:100%;line-height:1.5}img{max-width:100%;height:auto;display:block}button{background:none;border:none;cursor:pointer;font:inherit;color:#000}.Explanatory-text{font-size:1.6rem !important;line-height:1.6 !important;text-align:left !important}.Explanatory-text-indent{font-size:1.6rem;line-height:1.6}.annotation{font-weight:400;text-align:left;font-size:1.4rem;line-height:1.6;text-indent:-1.4rem;padding-left:1.4rem}.t-indent-16{text-indent:-1.6rem;padding-left:1.6rem}.img-inline{display:inline}.fw-400{font-weight:400}.fs-22{font-size:2.2rem !important}.mb-24{margin-bottom:2.4rem}.ml-8{margin-left:.8rem}.mb-12{margin-bottom:1.2rem}.mb-11{margin-bottom:1.1rem}.mb-8{margin-bottom:.8rem}.mt-8{margin-top:.8rem}.mt-m-8{margin-top:-0.8rem}.mt-16{margin-top:1.6rem}.mt-6{margin-top:.6rem}.mt-2{margin-top:.2rem}.mb-4{margin-bottom:.4rem}.mb-37{margin-bottom:3.7rem}html{font-family:"Noto Sans JP",sans-serif;font-size:62.5%;font-weight:normal;scroll-behavior:smooth !important}header{height:80px;min-width:1128px;width:100%;background-color:#fff;position:fixed;top:0;left:0;z-index:10}.l-header-box{display:flex;height:100%;align-items:center}.l-h-logo{display:flex}.l-h-logo img{height:50px;width:auto;margin-left:24px}.l-h-menu-pc{display:flex;justify-content:flex-end;margin-left:auto}@media(max-width: 767px){.l-h-menu-pc{display:none}}.l-h-menu-pc ul{display:flex;text-align:center}.l-h-menu-pc li{font-size:1.6rem;color:#333}.l-header-link-box{display:flex;margin-right:11px;align-items:center}.l-header-link-box:last-child{margin-right:0}.l-header-link-box li a{display:flex;align-items:center;justify-content:space-between;margin-right:11px}.l-header-link-box:not(:last-child)::after{content:"";border-right:1px solid #d3d3d3;height:14px;width:0}.arrow{position:relative;display:inline-block;width:10px;height:6px;margin-left:11px}.arrow::before,.arrow::after{content:"";position:absolute;bottom:0;left:calc(50% - .5px);width:1px;height:10px;border-radius:9999px;background-color:#000;transform-origin:50% calc(100% - .5px)}.arrow::before{transform:rotate(45deg)}.arrow::after{transform:rotate(-45deg)}.contact-button-box{display:flex;justify-content:center}.contact-button{display:flex;justify-content:center;align-items:center;width:172px;height:58px;background-color:#fcc800;border-radius:34px;border:2px solid #00469b}.l-mv-box{background-color:#fffbf4}.l-mv-text-box{width:100%;padding-top:2.4rem;padding-left:2.4rem;padding-right:2.4rem;margin-bottom:3.2rem}.l-mv-text-box p,.l-mv-text-box a,.l-mv-text-box span{font-size:1.4rem}.l-mv-text-box a{color:#3453ce;transition:opacity .3s ease;text-decoration:underline}@media(hover: hover){.l-mv-text-box a:hover{opacity:.7;text-decoration:none}}.l-mv-title-box{padding-left:1.1rem;padding-right:1.9rem;margin:0 auto}@media(min-width: 1025px){.container{max-width:1140px}}@media(min-width: 1025px){.container{max-width:1140px}}.about-box{background-color:#fffbf4;padding-top:4.3rem;padding-bottom:4rem;padding-left:1.6rem;padding-right:1.6rem;margin:0 auto}.about-box h2{margin-bottom:2.1rem}.about-box h2 img{width:32.7rem;height:auto;margin:0 auto}.about-schedule{margin:0 auto}.about-schedule p{font-size:1.6rem;line-height:1.6;margin-bottom:1.6rem;color:#311d07}.about-schedule a{display:block;width:28rem;padding:1.2rem 7.6rem;font-size:1.6rem;font-weight:700;background-color:#f36717;color:#fff;border-radius:4rem;margin:auto;text-align:center;transition:opacity .3s ease;-webkit-tap-highlight-color:rgba(0,0,0,0)}@media(hover: hover){.about-schedule a:hover{opacity:.7}}.schedule-box{margin:0 auto;position:relative;display:flex;flex-direction:column;align-items:center;width:100%;max-width:34.3rem;border-radius:8px;background-image:url("/stamp2025/assets/img/img-about-back.svg");background-repeat:repeat;margin-bottom:1.6rem;padding:24px 16px;transition:opacity .3s ease}.schedule-title{text-align:center;background-color:#f36717;border-radius:8px 8px 0 0;padding:4px 0;width:12.2rem;display:flex;justify-content:center;align-items:center}.schedule-title h3{color:#fff;font-size:1.6rem;font-weight:700;margin:0}.schedule-place-box{background-color:#fff;border-radius:8px;padding:1.6rem;width:100%}.schedule-place{display:flex;justify-content:center;align-items:center;width:100%;padding:10px 0;background-color:#ecfcfc;border-radius:8px;margin-bottom:8px}.schedule-place p{margin:0;font-size:1.6rem;font-weight:700;color:#f36717;text-align:center}.schedule-time{display:flex;justify-content:center;align-items:center;margin-top:14px}.about-schedule-img-1{position:absolute;display:inline;top:3px;right:20px;width:86px;height:auto}.about-schedule-img-2{position:absolute;bottom:71px;left:-6px;width:55px;height:auto}.about-schedule-img-3{position:absolute;bottom:4px;right:8px;width:56px;height:auto}.about-present-box{margin-top:4.2rem}.wallpaper-box{background-color:#ffdcb2;border-radius:8px 8px 0 0;padding:2.4rem 1.6rem}.wallpaper-text-box{background-color:#fff;border-radius:8px;padding:2.4rem 1.6rem}.wallpaper-title{text-align:center;color:#311d07}.wallpaper-title p{font-size:1.4rem;font-weight:700}.wallpaper-title img{width:19rem;margin:0 auto;margin-top:.4rem}.wallpaper-title 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a:hover{opacity:.7;text-decoration:none}}.contact-inquiry{font-size:1.6rem;line-height:1.6;margin-top:1.2rem}.experiment-box{color:#311d07;background-color:#ffdcb2;padding-top:4.3rem;padding-left:1.6rem;padding-right:1.6rem;padding-bottom:3.8rem}.experiment-box h2{font-size:2.2rem;font-weight:700;text-align:center;margin-bottom:1.6rem}.experiment-box .experiment-icon{margin:auto;margin-bottom:2.4rem;width:24.5rem;height:auto}div.experiment-link{margin-top:4rem}div.experiment-link p{font-size:1.8rem;font-weight:700;margin-bottom:1.6rem}div.experiment-link a{color:#3453ce;font-size:1.6rem;text-decoration:underline}@media(hover: hover){div.experiment-link a:hover{opacity:.7;text-decoration:none}}.accordion-link a{color:#3453ce;text-decoration:underline}@media(hover: hover){.accordion-link a:hover{opacity:.7;text-decoration:none}}.accordion-link img{margin-right:3px;margin-left:3px}.footer-box{position:relative;display:flex;height:5.6rem;justify-content:center;background-color:#fffbf4}.footer-box p{font-size:1.4rem;color:#9d7d5a;margin-top:1.6rem}@media(max-width: 767px){.footer-box{padding-bottom:10rem}}.footer-box::before{content:"";position:absolute;left:1.6rem;right:1.6rem;top:0;height:1px;background:#9d7d5a}.layout-container{position:relative;display:flex;width:100%;height:100vh;overflow:hidden;background-image:url("/stamp2025/assets/img/img-pc-bg.svg");background-repeat:repeat;min-height:1000px}@media(max-width: 767px){.layout-container{min-height:initial;height:auto}}.left-fixed{width:41%;height:100%;box-sizing:border-box;position:relative}.right-fixed{display:flex;align-items:center;width:calc(59% - 375px);height:100%;box-sizing:border-box;position:relative}.center-scroll{width:375px;height:100%;position:relative;display:flex;justify-content:center;align-items:flex-start;flex-shrink:0}.sp-frame{width:375px;box-shadow:0 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16px;border-radius:8px;margin-bottom:4.8rem}.pc-event-period-box{display:flex;align-items:center;justify-content:center;width:10.4rem;height:4.7rem;background-color:#f36717;font-size:1.6rem;font-weight:700;color:#fff;border-radius:8px;margin-right:1.6rem}.pc-event-place{font-size:2.2rem;font-weight:700;color:#f36717}.pc-event-time{width:230px !important;height:auto;margin:0 !important;margin-top:8px !important}.pc-text-box{width:41.6rem;font-size:1.4rem;line-height:1.6;color:#311d07}.pc-text-arrow{display:inline-block;color:#06c;text-decoration:none;position:relative;padding-left:8px;font-size:14px;margin-top:10px;text-decoration:underline;transition:opacity .3s ease}@media(hover: hover){.pc-text-arrow:hover{opacity:.7;text-decoration:none}}.pc-text-arrow::before,.pc-text-arrow::after{content:"";position:absolute;top:calc(50% - 1.5px);left:0;width:8px;height:1px;border-radius:9999px;background-color:#3453ce;transform-origin:calc(100% - .5px) 50%}.pc-text-arrow::before{transform:rotate(45deg)}.pc-text-arrow::after{transform:rotate(-45deg)}.tablet-box{padding:80px 56px 103px 56px}@media(max-width: 1024px){.tablet-box{padding:0 0 0 56px}}.tablet-box a{display:flex;align-items:center}.tablet-box img{width:40px;height:40px}.icon-box span{font-size:1.6rem;font-weight:900;margin-left:12px}.icon-box li{margin-bottom:31px;width:fit-content;color:#311d07}.icon-box a{margin-bottom:31px;width:fit-content;color:#311d07;transition:opacity .3s ease}@media(hover: hover){.icon-box a:hover{opacity:.7}}.app-box{margin-top:48px}.app-box p{font-size:1.4rem;font-weight:700;margin-bottom:8px;color:#311d07}.qr-box{width:318px;height:169px;background-color:#fff;border-radius:8px;padding:24px 40px;display:grid;grid-template-columns:repeat(2, 1fr);gap:59px;text-align:center}.qr-box p{font-weight:500;color:#311d07}@media(min-width: 1025px)and (max-width: 1230px){.qr-box{width:100%;height:100%;background-color:#fff;border-radius:8px;padding:24px 40px;display:flex;flex-direction:column;align-items:center;gap:20px;text-align:center}}.qr-downlord{display:flex;justify-content:center;flex-direction:column}.qr-downlord img{width:88px;height:88px}.app-box-annotation{margin-top:8px}.app-box-annotation p{font-weight:400;text-align:left;font-size:1rem;line-height:1.6;text-indent:-1rem;padding-left:1rem}.app-download-bar-box{position:fixed;width:100%;bottom:0;left:0;padding:0 16px;z-index:1000}@media(min-width: 768px){.app-download-bar-box{display:none}}.a-btn-box{display:flex;justify-content:center}.app-download-bar{width:289px;height:54px;border-radius:8px 0px 0 0;background-color:#f36717;display:flex;align-items:center;justify-content:space-between;box-shadow:0 -4px 10px rgba(0,0,0,.1)}.app-icon-container{position:relative;width:75px;height:100%;margin-right:4px}.menu-illust-box{width:216px;height:auto;margin:0 auto}.app-icon{position:absolute;bottom:0;width:75px;height:auto;z-index:2;margin-left:8px}.download-text{flex-grow:1;font-size:16px;font-weight:bold;color:#fff;line-height:1.3;margin-left:8px}.menu-button-box{width:54px;height:54px;background-color:#f7efe2;border-radius:0 8px 0 0;display:flex;justify-content:center;align-items:center}.menu-button{height:30px;display:flex;flex-direction:column;justify-content:space-between;padding:5px}.menu-button span{display:block;width:30px;height:2px;background-color:#4a2a08}.fullscreen-menu{position:fixed;top:0;right:-100%;width:100%;height:100%;background-color:#fffbf4;z-index:2000;display:flex;flex-direction:column;overflow-y:auto;transition:right .3s ease;padding-bottom:24px}.fullscreen-menu.active{right:0}.menu-header{display:flex;justify-content:flex-end}.close-menu{background:none;border:none;font-size:24px;cursor:pointer;padding:16px 16px 12px 0}.menu-list li{margin-bottom:15px}.menu-list li a{display:block;padding:12px 0;color:#333;text-decoration:none;font-size:18px;border-bottom:1px solid #f0f0f0}.menu-text-box{display:flex;justify-content:center;padding:24px 48px 56px 48px}.menu-text-box a{display:flex;align-items:center}.menu-text-box img{width:40px;height:40px}.menu-icon-box span{font-size:1.6rem;font-weight:900;margin-left:12px;color:#311d07}.menu-icon-box li:not(:last-child){margin-bottom:31px}.app-download-bar-box{position:fixed;width:100%;bottom:0;left:0;padding:0 16px;z-index:1000}@media(min-width: 768px){.app-download-bar-box{display:none}}@media(min-width: 768px){.menu-downlord-box{display:none}}.menu-app-download-bar{width:100%;max-width:280px;margin:0 auto;height:54px;border-radius:50px;background-color:#f36717;display:flex;align-items:center;justify-content:space-between;box-shadow:0 -4px 10px rgba(0,0,0,.1)}.menu-app-icon-container{position:relative;width:60px;height:100%;margin-right:4px;margin-left:22px}.menu-app-icon{position:absolute;bottom:0;width:60px;height:auto}.menu-download-text{flex-grow:1;font-size:16px;font-weight:bold;color:#fff;line-height:1.3}.cautionary-note-quo{padding:3.8rem 1.6rem;background-color:#fffbf4}.cautionary-note-quo h2{font-size:1.8rem;font-weight:700;margin-bottom:1.6rem}.cautionary-note-quo a{color:#3453ce;text-decoration:underline;font-size:1.6rem}.cautionary-note-quo-text li{color:#311d07;font-size:1.6rem;font-weight:400;margin-bottom:0;text-indent:-1.6rem;padding-left:1.4rem}.h-menu-sp{display:none}@media(max-width: 767px){.h-menu-sp{display:flex;align-items:center;justify-content:flex-end;margin-left:auto;background-color:#f7efe2;border-radius:0 8px 0 0;height:100%;width:54px}}.hamburger-container{margin-right:20px;z-index:1000}.hamburger-btn{background:none;border:none;cursor:pointer;padding:0}.icon{display:block;width:30px;height:2px;background-color:#4a2a08;position:relative;margin:auto;margin-left:6px;transition:transform .3s ease,background-color .3s ease;margin-top:16px}.icon::before,.icon::after{content:"";display:block;width:30px;height:2px;background-color:#4a2a08;position:absolute;transition:transform .3s ease,opacity .3s ease}.icon::before{top:-8px}.icon::after{top:8px}.hamburger-btn.open .icon{background-color:rgba(0,0,0,0);margin-left:0;margin-right:5px}.hamburger-btn.open .icon::before{transform:rotate(25deg);top:0}.hamburger-btn.open .icon::after{transform:rotate(-25deg);top:0}.menu-label{font-size:1.4rem;color:#00469b;margin:5px 0 0;transition:color .3s ease;margin-top:16px}.slide-menu{position:fixed;top:0;right:-100%;width:100%;max-width:750px;height:100%;background-color:#eff8fc;transition:transform .3s ease;padding:100px 24px;padding-right:calc(11% + 24px);z-index:1500}.slide-menu ul{width:100%;margin:0 auto;margin-bottom:32px}.slide-menu li{display:flex;align-items:center;padding:16px 0;border-bottom:1px solid #00469b;font-size:1.5rem;color:#00469b}.slide-menu li::before{content:"▶";font-size:12px;color:#00469b;margin-right:8px}.slide-menu.open{transform:translateX(-100%)}.accordion-container{max-width:600px;margin:0 auto}.accordion-item{background-color:#f8f4eb;overflow:hidden}.accordion-header{height:4.5rem;position:relative;padding:15px 40px 15px 20px;font-weight:bold;font-size:16px;color:#311d07;cursor:pointer;text-align:center;display:flex;justify-content:center;align-items:center;user-select:none;border-bottom:1px solid #cbcbcb}.title{display:block;width:100%;text-align:center}.chevron-arrow{position:absolute;top:calc(50% - 3px);transform:rotate(180deg);right:12px;width:12px;height:6px;display:inline-block;transition:transform .3s ease;transform-origin:center}details[open] .chevron-arrow{transform:rotate(0deg)}.accordion-content{background-color:#fff;padding:24px 16px;font-size:16px;line-height:1.6;color:#311d07}summary::-webkit-details-marker{display:none}summary{list-style:none}.accordion-annotation{font-weight:400;text-align:left;font-size:1.4rem;line-height:1.6;margin-left:-0.6rem;margin-top:1.4rem}.accordion-annotation-out{font-weight:400;font-size:1.4rem;margin-top:1rem}