:root{--cyan:#29b6d8;--pale:#e9f9fd;--ink:#334155;--dark:#163d4b;--muted:#526674;--line:#d8e7eb;--orange:#ff9f43}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:110px}body{color:var(--ink);background:#fff;margin:0;font-family:Noto Sans JP,Yu Gothic,Meiryo,sans-serif;font-size:16px;line-height:1.9}a{color:#086b83;text-underline-offset:4px}a:hover{color:#004b60}button,a,summary{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,summary:focus-visible{outline-offset:5px;outline:3px solid #bb600e}h1,h2,h3{color:var(--dark);letter-spacing:.025em;line-height:1.5}h1{margin:20px 0;font-size:clamp(30px,3.3vw,46px)}h2{margin:12px 0 24px;font-size:clamp(24px,2.5vw,31px)}h3{font-size:20px}p{margin:14px 0 22px}small,.fine{color:var(--muted);font-size:13px;line-height:1.8}.wrap{max-width:1160px;margin:auto;padding:0 32px}.preview-bar{text-align:center;color:#fff;letter-spacing:.09em;background:#173e4c;padding:5px;font-size:12px}header{border-bottom:1px solid var(--line);background:#fff}.header-inner{justify-content:space-between;align-items:center;gap:30px;max-width:1224px;margin:auto;padding:22px 32px;display:flex}.brand{color:var(--dark);align-items:center;gap:12px;font-size:19px;font-weight:800;line-height:1.5;text-decoration:none;display:flex}.brand small{font-size:12px;font-weight:600;display:block}.brand-mark{background:var(--pale);color:#087e99;border-radius:14px;place-items:center;width:45px;height:45px;font-size:36px;display:grid}.badge{border:1px solid var(--line);margin-left:8px;padding:2px 5px;font-size:10px}nav{flex-wrap:wrap;gap:26px;display:flex}nav a{font-size:13px;font-weight:700;text-decoration:none}.hero{background:var(--pale);padding:46px 0 56px;position:relative;overflow:hidden}.hero-grid{grid-template-columns:1.1fr 1fr;align-items:center;gap:70px;display:grid}.eyebrow,.section-number{letter-spacing:.14em;color:#146b7f;font-size:11px;font-weight:800}.year{letter-spacing:0;background:#fff;border-radius:4px;margin-left:18px;padding:5px 12px}.underline{text-underline-offset:2px;text-decoration-skip-ink:none;text-decoration:underline 9px #80d7e9}.hero-sub{color:#226478;font-size:24px;font-weight:700;line-height:1.6}.hero-tags{color:#246477;gap:18px;font-size:12px;font-weight:700;display:flex}.hero-right{padding-top:105px;position:relative}.mini-illustration{justify-content:center;align-items:flex-end;gap:28px;height:115px;display:flex;position:absolute;top:-2px;left:28px;right:20px}.screen{text-align:center;background:#fff;border:6px solid #24758c;border-bottom-width:15px;border-radius:9px;width:125px;height:90px;font-size:45px;line-height:1.4;transform:rotate(-7deg)}.plant{color:#39866d;font-size:75px;line-height:1}.box{color:#7b5932;background:#efd2a8;border-top:12px solid #e1bc89;place-items:center;width:85px;height:65px;font-size:18px;font-weight:800;display:grid;transform:rotate(7deg)}.code-card{background:#fff;border:1px solid #c8e4ec;border-radius:14px;padding:28px;box-shadow:0 10px 30px #18556909}.reward{margin:10px 0 22px;font-size:14px}.reward strong{color:#9a4700;font-size:43px;line-height:1.5;display:block}.reward strong span{margin-left:4px;font-size:21px}.pending{text-align:center;background:#f4f7f8;border:1px dashed #a9bec6;border-radius:6px;margin-bottom:15px;padding:19px 12px;font-size:14px;font-weight:700}.status-dot{background:#69818b;border-radius:50%;width:7px;height:7px;margin-right:8px;display:inline-block}.button{cursor:pointer;border-radius:6px;justify-content:space-between;align-items:center;width:100%;min-height:48px;padding:12px 18px;font-size:14px;font-weight:700;text-decoration:none;display:flex}.outline{color:#17677c;background:#fff;border:1px solid #1a8098}.orange{background:var(--orange);color:#4e2805;border:0}.code{user-select:all;overflow-wrap:anywhere;font-family:monospace;font-size:27px}.copy-status{color:#166534;font-size:13px}.reading-layout{grid-template-columns:240px minmax(0,1fr);gap:70px;padding-top:65px;padding-bottom:80px;display:grid}.toc{align-self:start;position:sticky;top:30px}.toc h2{font-size:14px}.toc ol{margin:0;padding-left:20px;font-size:13px}.toc li{padding:8px 0}.toc a{text-decoration:none}.side-link{border-top:1px solid var(--line);margin-top:24px;padding-top:24px;font-size:14px;font-weight:700;display:block}.content{min-width:0}.content>section{border-bottom:1px solid var(--line);margin:0 0 48px;padding:0 0 48px}.benefit-grid{text-align:center;background:var(--pale);border-radius:12px;grid-template-columns:1fr 30px 1fr;align-items:center;padding:26px 14px;display:grid}.benefit-grid div span{font-size:13px;display:block}.benefit-grid strong{color:#19657c;font-size:48px;line-height:1.6;display:block}.benefit-grid small{margin-left:4px;font-size:17px}.and{color:#49899b;font-size:21px}.source{color:var(--muted);font-size:12px}.steps{padding:0;list-style:none}.steps li{border-bottom:1px solid var(--line);gap:24px;padding:24px 0;display:flex;position:relative}.steps li>span{color:#087e99;background:var(--pale);border-radius:50%;flex-shrink:0;place-items:center;width:58px;height:58px;font-size:26px;font-weight:800;line-height:1.5;display:grid}.steps h3{margin:3px 0 8px;font-size:18px}.steps p{margin-bottom:0;font-size:14px}.checklist{gap:12px;padding:0;list-style:none;display:grid}.checklist li{background:#f5fafb;border-radius:5px;padding:13px 18px;font-size:14px}.checklist li:before{content:"✓";color:#087e99;margin-right:12px;font-weight:800}.note{border-left:4px solid var(--orange);background:#fff8ed;margin-top:28px;padding:22px;font-size:14px}.note p{margin-bottom:0}.table-wrap{max-width:100%}table{border-collapse:collapse;text-align:left;width:100%;font-size:14px}caption{text-align:left;color:var(--muted);padding:10px 0;font-size:12px}th,td{border-bottom:1px solid var(--line);padding:20px 18px}thead{background:var(--pale)}tbody th{font-weight:500}td{white-space:nowrap;text-align:right}td strong{color:var(--dark);font-size:24px}th small{font-size:11px;display:block}.experience{background:#f7fafb;border-radius:10px;margin-top:30px;padding:26px}.experience h3{font-size:18px}dl div{border-bottom:1px solid var(--line);grid-template-columns:110px 1fr;padding:10px 0;font-size:13px;display:grid}dd{margin:0}.faq-list{border-top:1px solid var(--line)}details{border-bottom:1px solid var(--line)}summary{cursor:pointer;align-items:center;gap:13px;padding:22px 0;font-size:14px;font-weight:700;list-style:none;display:flex}summary::-webkit-details-marker{display:none}.q{color:#087e99;font-size:20px}.plus{color:#087e99;margin-left:auto}details[open] .plus{transform:rotate(45deg)}.answer{padding:0 28px;font-size:14px}.related-grid{gap:18px;display:grid}.article-card{border:1px solid var(--line);border-radius:9px;padding:25px;text-decoration:none;display:block}.article-card:hover{background:var(--pale)}.article-card h3{font-size:20px}.article-card p{color:var(--muted);font-size:14px}.read-more{font-size:13px;font-weight:800}footer{background:#f0f6f8;padding:50px 0}footer nav{gap:14px 24px;margin:25px 0}footer strong{font-size:18px}footer p{font-size:14px}.skip{z-index:10;background:#fff;padding:10px;position:absolute;top:-100px;left:10px}.skip:focus{top:0}.page-head{background:var(--pale);padding:40px 0}.breadcrumb{margin-bottom:24px;font-size:12px}.article-body{max-width:780px;margin:50px auto 80px;padding:0 28px}.article-body h2{border-top:1px solid var(--line);margin-top:52px;padding-top:20px;font-size:26px}.article-body h3{margin-top:28px}.article-body li{margin-bottom:12px}.article-toc{background:#f4fafc;border-radius:8px;padding:22px}.article-toc a{font-size:14px}.article-toc ol{padding-left:24px}.service-grid{grid-template-columns:1fr 1fr;gap:16px;display:grid}.service-grid>div{border:1px solid var(--line);border-radius:8px;padding:20px}.service-grid h3{margin:0 0 10px}.service-grid p{margin:0;font-size:14px}@media (width<=900px){.hero-grid{gap:30px}.reading-layout{grid-template-columns:190px minmax(0,1fr);gap:35px}nav{gap:16px}.header-inner{gap:14px}}@media (width<=700px){body{font-size:15px}.wrap{padding-left:22px;padding-right:22px}.header-inner{flex-wrap:wrap;gap:16px;padding:17px 22px}.brand{font-size:17px}.header-inner nav{justify-content:space-between;gap:8px;width:100%}.header-inner nav a{font-size:11px}.hero{padding-top:30px}.hero-grid{grid-template-columns:1fr;gap:12px}.hero h1{font-size:32px}.hero-sub{font-size:22px}.hero-right{padding-top:110px}.code-card{padding:24px}.reading-layout{padding-top:32px;display:block}.toc{background:#f4fafc;border-radius:8px;margin-bottom:42px;padding:22px;position:static}.toc h2{font-size:15px}.toc ol{grid-template-columns:1fr;gap:0;display:grid}.side-link{display:none}.content>section{margin-bottom:36px;padding-bottom:32px}.content h2{font-size:25px}.steps li{gap:15px}.steps li>span{width:45px;height:45px;font-size:22px}.benefit-grid strong{font-size:41px}th,td{padding:16px 10px}tbody th{font-size:12px}td strong{font-size:22px}.experience{padding:20px}dl div{grid-template-columns:85px 1fr}.service-grid{grid-template-columns:1fr}.article-body h2{font-size:24px}.article-body{padding:0 22px}.desktop{display:none}footer nav{grid-template-columns:1fr 1fr;gap:15px;display:grid}.hero-tags{font-size:11px}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}.article-body{overflow-wrap:anywhere}.article-body table{table-layout:fixed}.article-body td{white-space:normal;text-align:left}.article-body th:first-child,.article-body td:first-child{width:30%}@media (width<=700px){.article-body td,.article-body th{padding:12px 8px;font-size:12px}}.simple-intro{background:#fff;padding:35px 24px 0}.simple-column{max-width:760px;margin:auto}.intro-category{color:#146b7f;margin:0 0 8px;font-size:12px;font-weight:700;display:inline-block}.simple-intro h1{letter-spacing:0;margin:0 0 12px;font-size:30px;line-height:1.6}.intro-date{color:var(--muted);margin:0 0 22px;font-size:12px}.intro-lead{margin:0 0 22px;font-size:15px}.simple-intro .code-card{max-width:620px;margin:auto}.code-card{box-shadow:none;text-align:center;background:#f5fcfe;border:2px solid #a7dfea;border-radius:8px;padding:22px 28px}.code-card-label{color:var(--dark);margin:0 0 6px;font-size:16px;font-weight:800}.code-card .reward{margin:0 0 15px;font-size:14px}.code-card .reward strong{color:#945000;margin-left:8px;font-size:26px;display:inline}.code-card .reward strong span{font-size:16px}.code-card .pending{background:#fff;margin:0 0 14px;padding:17px 8px}.code-card .button{justify-content:center;gap:12px;max-width:460px;margin:0 auto}.code-card .outline{color:#462808;background:#ff9f43;border-color:#ff9f43}.code-card .fine{margin:12px 0 0;font-size:11px}.intro-footnote{text-align:center;margin:14px 0 0;font-size:12px}.simple-reading{max-width:824px;padding-top:30px;display:block}.simple-reading .toc{border:1px solid var(--line);background:#f7fafb;border-radius:5px;margin-bottom:45px;padding:20px 28px;position:static}.simple-reading .toc h2{margin:0 0 8px;font-size:16px}.simple-reading .toc ol{grid-template-columns:1fr 1fr;gap:0 25px;font-size:13px;display:grid}.simple-reading .toc li{padding:5px 0}.simple-reading .section-number{display:none}.simple-reading .content h2{font-size:26px}.simple-reading .content>section{margin-bottom:35px;padding-bottom:35px}.simple-reading .content>section h2 br{display:none}@media (width<=700px){.simple-intro{padding:24px 20px 0}.simple-intro h1{font-size:24px;line-height:1.55}.intro-date{margin-bottom:16px;font-size:11px}.intro-lead{margin-bottom:18px;font-size:14px}.code-card{padding:19px 15px}.code-card-label{font-size:15px}.code-card .reward{font-size:12px}.code-card .reward strong{margin-left:5px;font-size:24px}.code-card .pending{padding:15px 5px;font-size:12px}.code-card .button{min-height:48px;padding:12px 7px;font-size:12px}.simple-reading{padding-top:25px}.simple-reading .toc{padding:18px 22px}.simple-reading .toc ol{grid-template-columns:1fr}.simple-reading .content h2{font-size:23px}}.code-card .code{color:#08758d;letter-spacing:.045em;font-weight:700}.code-card{background:#fff;border:0;border-radius:0;padding:12px 0}.code-display{text-align:left;background:#fff;border:2px dashed #e9b573;border-radius:3px;margin:0 0 18px;padding:23px 26px}.code-display .code-card-label{color:#596574;margin:0 0 5px;font-size:15px;font-weight:500}.code-line{align-items:baseline;gap:10px;margin:0;line-height:1.6;display:flex}.code-card .reward{margin-bottom:16px}.code-card [data-copy]{color:#334155;background:#fff;border:1px solid #a5b6bc;min-height:44px}.code-card .copy-status{min-height:20px;margin:6px 0 12px;font-size:12px}.code-card .application-button{margin-top:12px}@media (width<=700px){.code-display{padding:19px 16px}.code-display .code-card-label{font-size:13px}.code-card .code{letter-spacing:.035em;font-size:25px}.code-line{gap:7px}}.code-display{text-align:center;background:#e9f9fd;border:0;border-radius:10px;padding:24px 20px}.code-display .code-card-label{color:#345a70;margin-bottom:8px;font-size:13px;font-weight:600}.code-line{margin:0;display:block}.code-card .code{color:#b42332;letter-spacing:.065em;font-family:Arial,Noto Sans JP,sans-serif;font-size:32px;font-weight:750;line-height:1.5}@media (width<=700px){.code-display{padding:22px 12px}.code-card .code{letter-spacing:.045em;font-size:26px}}.application-button{isolation:isolate;position:relative;overflow:hidden}.application-button:before{content:"";z-index:-1;pointer-events:none;background:linear-gradient(110deg,#0000 30%,#ffffff8c 50%,#0000 70%);animation:3s ease-in-out infinite application-shine;position:absolute;inset:0;transform:translate(-120%)}@keyframes application-shine{0%,70%{transform:translate(-120%)}95%,to{transform:translate(120%)}}@media (prefers-reduced-motion:reduce){.application-button:before{animation:none;display:none}}.intro-with-mascot{grid-template-columns:minmax(0,1fr) 164px;align-items:center;gap:22px;margin-bottom:18px;display:grid}.intro-with-mascot .intro-lead{margin:0}.eco-nyan{text-align:center;margin:0}.eco-nyan img{object-fit:contain;width:100%;height:176px;display:block}.eco-nyan figcaption{color:#526674;white-space:nowrap;margin-top:4px;font-size:10px;line-height:1.6}.faq-with-mascot{justify-content:space-between;align-items:center;gap:16px;margin-bottom:18px;display:flex}.faq-with-mascot h2{margin:0}.eco-nyan--compact{flex:0 0 68px}.eco-nyan--compact img{height:78px}@media (width<=700px){.intro-with-mascot{grid-template-columns:minmax(0,1fr) 104px;gap:14px;margin-bottom:16px}.eco-nyan img{height:124px}.eco-nyan figcaption{white-space:normal;font-size:9px}.eco-nyan--compact{flex-basis:56px}.eco-nyan--compact img{height:64px}}
