:root{font-family:'Noto Sans JP','Yu Gothic',Meiryo,sans-serif;color:#132d4d;background:#fff;--blue:#1264e8;--ink:#102a49;--muted:#4b6486;--line:#cbd6e5;--tint:#f2f6fc;font-synthesis:none}
*{box-sizing:border-box}body{margin:0;line-height:1.85}a{color:var(--blue);text-underline-offset:4px}button,input{font:inherit}button{cursor:pointer}button:disabled{cursor:default;opacity:.55}[hidden]{display:none!important}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid #124bb8;outline-offset:4px}.page-shell{max-width:1180px;margin:0 auto;padding:12px 30px 0}.site-header{display:flex;justify-content:space-between;align-items:center;gap:24px;min-height:85px}.brand{display:flex;align-items:center;gap:4px;color:var(--blue);font-size:36px;font-weight:800;letter-spacing:-.045em;line-height:1;text-decoration:none;flex-shrink:0}.brand img{display:block;object-fit:contain;width:90px;height:72px}.site-header nav,.site-footer nav{display:flex;align-items:center;gap:24px}.site-header nav a{font-size:14px}.nav-cta{border:1px solid var(--blue);border-radius:5px;padding:8px 15px;font-weight:700;text-decoration:none}.hero{padding:64px 10px 56px}.eyebrow{display:block;color:#416284;font-size:14px;font-weight:700;letter-spacing:.035em;margin:0 0 10px}.hero h1{font-size:clamp(32px,4.5vw,52px);line-height:1.5;letter-spacing:-.04em;margin:0 0 18px;color:#092443;font-weight:800}.lead{font-size:21px;color:#3c577b;line-height:1.9;margin:0 0 25px}.hero-note,.small{font-size:13px;color:var(--muted);line-height:1.85}.hero-note{margin:12px 0 0}.button{display:inline-flex;align-items:center;justify-content:center;gap:18px;min-height:52px;padding:10px 22px;border:1px solid var(--blue);border-radius:5px;font-size:16px;font-weight:700;line-height:1.7;text-decoration:none}.primary{background:var(--blue);color:#fff}.primary:hover{background:#0b51c7}.secondary{background:#fff;color:var(--blue);border-color:#aabdd6}.secondary:hover{background:#f4f8ff}.content-section{padding:36px 10px 40px;border-top:1px solid var(--line)}h2{font-size:28px;line-height:1.6;letter-spacing:-.03em;margin:0 0 18px;font-weight:800}h3{font-size:19px;line-height:1.7;margin:0 0 10px}p{margin:0 0 15px}.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;list-style:none;margin:22px 0 0;padding:0}.steps li{background:var(--tint);border-radius:6px;padding:24px;min-width:0}.steps p{font-size:15px}.steps .small{font-size:12px;margin-bottom:0}.step-number{display:block;color:var(--blue);font-size:31px;font-weight:800;margin-bottom:12px;line-height:1}.two-columns{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:48px}.two-columns p{font-size:15px}.note-card{background:#edf5ff;border-radius:6px;padding:25px}.note-card ul,.caution ul{padding-left:23px;margin:0 0 14px;font-size:15px}.note-card li,.caution li{margin-bottom:10px}.caution{background:#fff8e9;border-left:3px solid #af761b;color:#5e451e;border-top:0;margin-top:10px;padding:26px 28px;border-radius:3px}.caution h2{font-size:23px}.caution p:last-child{margin-bottom:0}.share-section{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:35px;margin-top:38px}.share-controls{min-width:0}.button-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:12px}.share-controls label{display:block;font-size:12px}.public-url{display:block;min-height:43px;width:100%;border:1px solid #b7c7dc;border-radius:5px;padding:8px 11px;color:var(--ink);background:#fff;font-size:14px}.share-status{min-height:25px;margin:7px 0 0;font-size:13px;color:#385578}.tools-section{border-top:1px solid var(--line);padding:32px 10px 15px;margin-top:24px}.tools-section h2{font-size:23px;margin-bottom:5px}.tools-frame{display:block;width:100%;height:1050px;border:0;overflow:hidden;background:#fff}.site-footer{border-top:1px solid var(--line);display:flex;justify-content:space-between;align-items:start;gap:20px;padding:18px 0 24px;color:var(--muted);font-size:12px;line-height:1.8}.site-footer p{margin:0}.site-footer nav{flex-wrap:wrap;gap:16px}.compact{padding:46px 10px 28px}.compact h1{font-size:42px}.compact .lead{font-size:20px}.prose{max-width:860px;padding:0 10px}.prose section{border-top:1px solid var(--line);padding:29px 0 16px}.prose h2{font-size:23px;margin-bottom:12px}.prose p{font-size:15px;line-height:2}.prose .caution{padding:24px;border-top:0;margin-top:15px}.prose .updated{font-size:12px;color:var(--muted);margin-top:25px}.video-block{margin:28px 0}.video-screen{position:relative;aspect-ratio:16/9;border-radius:6px;overflow:hidden;background:#edf5ff;display:flex;align-items:center;justify-content:center}.video-screen iframe{display:block;width:100%;height:100%;border:0}.video-play{border:1px solid var(--blue);border-radius:5px;background:#fff;color:var(--blue);font-weight:700;padding:15px 22px;min-height:52px}.skip-link{position:fixed;left:15px;top:-100px;z-index:20;padding:10px;background:#fff}.skip-link:focus{top:10px}
@media(max-width:850px){.page-shell{padding:10px 20px 0}.site-header{align-items:flex-start;gap:12px}.brand{font-size:30px}.brand img{width:76px;height:63px}.site-header nav{gap:12px;padding-top:15px;flex-wrap:wrap;justify-content:flex-end}.site-header nav a{font-size:12px}.hero{padding-top:38px}.lead{font-size:18px}.steps{grid-template-columns:minmax(0,1fr)}.steps li{padding:24px}.step-number{font-size:26px}.two-columns,.share-section{grid-template-columns:minmax(0,1fr);gap:20px}.site-footer{flex-direction:column;gap:8px}.tools-frame{height:1400px}.content-section{padding:28px 4px}.caution{padding:23px 24px}.tools-section{padding-left:4px;padding-right:4px}h2{font-size:25px}}
@media(max-width:480px){.page-shell{padding:7px 16px 0}.site-header{flex-wrap:wrap;gap:0}.brand{font-size:29px}.brand img{width:74px;height:61px}.site-header nav{padding:0 2px 9px;width:100%;justify-content:flex-start;gap:18px}.site-header nav .nav-cta{padding:4px 12px}.hero{padding:26px 2px 35px}.hero h1{font-size:31px}.hero .lead{font-size:15px}.eyebrow{font-size:12px}.wide-only{display:none}.button{font-size:15px;padding:10px 18px;gap:10px}.hero-note{font-size:12px}.content-section h2{font-size:23px}.steps li{padding:22px 20px}.steps p,.two-columns p,.caution li{font-size:14px}.note-card{padding:22px}.caution h2{font-size:21px}.share-section p{font-size:14px}.button-row{gap:8px}.share-controls .button{padding:10px 14px}.tools-section h2{font-size:21px}.tools-frame{height:1660px}.compact h1{font-size:30px}.compact .lead{font-size:16px}.prose{padding:0 2px}.prose h2{font-size:21px}.prose p{font-size:14px}.prose .caution{padding:20px}.prose>p .button{margin-bottom:10px}.site-footer{font-size:11px}.public-url{font-size:13px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
.manual-ad-section{min-width:0;max-width:100%;margin:40px 10px 32px;border-top:1px solid var(--line);padding-top:24px}.ad-label{color:#617287;font-size:12px;line-height:1.8;letter-spacing:.05em;text-align:center;margin:0 0 10px}.ad-space{width:100%;min-width:0;max-width:100%;min-height:280px;overflow-x:auto;overscroll-behavior-x:contain;background:#f8fafc}.adsbygoogle{display:block;min-width:0;width:100%;max-width:100%;min-height:250px}
@media(max-width:480px){.manual-ad-section{margin:34px 2px 28px;padding-top:22px}.ad-space{min-height:270px}}