:root{--bg:#f6f8fc;--surface:#fff;--ink:#24364b;--muted:#5c6b7d;--primary:#245fd1;--primary-hover:#1c4eb0;--blue-soft:#edf3ff;--teal:#087e82;--teal-soft:#eaf7f6;--common:#344766;--common-soft:#f0f3f8;--warning:#795514;--warning-soft:#fff6e5;--error:#b23642;--line:#dce4ef;--control-border:#8999af;--focus:#1559bd;--font:"Noto Sans JP","Noto Sans CJK JP","Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif;--content-width:1080px;--radius-card:20px;--radius-control:12px;--primary-height:52px;--shadow:0 6px 28px #1f345509}*{box-sizing:border-box}body{background:var(--bg);color:var(--ink);font:16px/1.9 var(--font);margin:0}header{border-bottom:1px solid var(--line);background:#fff;align-items:center;height:72px;padding:0 max(16px,50vw - 540px);display:flex}header a{align-items:center;min-height:44px;text-decoration:none;display:inline-flex}header .brand-wordmark{width:180px;height:auto;display:block}a{color:var(--primary);overflow-wrap:anywhere}a:focus-visible{outline:3px solid var(--focus);outline-offset:3px}main{border:1px solid var(--line);background:#fff;border-radius:20px;max-width:820px;margin:40px auto;padding:32px}h1{font-size:30px;line-height:1.4}h2{margin-top:32px;font-size:21px}p,li{overflow-wrap:anywhere}footer{text-align:center;color:var(--muted);padding:32px 16px}.footer-brand{align-items:center;gap:10px;display:inline-flex}.footer-brand .brand-wordmark{width:145px;height:auto;display:block}.footer-brand small{white-space:nowrap;font-size:11px;font-weight:400}footer a{min-height:44px;margin:4px 10px;display:inline-block}.note{background:var(--blue-soft);border-radius:12px;padding:16px}@media (max-width:767px){header{height:64px}header .brand-wordmark{width:150px}}@media (max-width:600px){main{margin:24px 16px;padding:24px 20px}h1{font-size:26px}}footer a.footer-brand{color:var(--ink);align-items:center;font-weight:700;text-decoration:none;display:inline-flex}footer a.footer-brand:hover{text-decoration:underline}.guide-video{border:1px solid var(--line);background:var(--blue-soft);border-radius:16px;grid-template-columns:minmax(0,1fr) 220px;align-items:center;gap:28px;margin:28px 0 36px;padding:24px;display:grid}.guide-video h2{margin:0 0 8px}.guide-video p{margin:0}.guide-video-stage{aspect-ratio:9/16;background:linear-gradient(160deg,#ddeaff,#accaff);border-radius:14px;width:220px;max-width:100%;overflow:hidden}.guide-video-stage button,.guide-video-stage iframe{border:0;width:100%;height:100%;display:block}.guide-video-stage button{color:#173d8e;font:inherit;text-align:center;cursor:pointer;background:0 0;flex-direction:column;justify-content:center;align-items:center;gap:14px;padding:18px;display:flex}.guide-video-stage button strong{line-height:1.5}.guide-video-stage button:hover{background:#ffffff4d}.guide-video-stage button:focus-visible{outline:3px solid var(--focus);outline-offset:-5px}.guide-video-play{color:#fff;background:var(--primary);border-radius:50%;place-items:center;width:64px;height:64px;font-size:23px;display:grid;box-shadow:0 4px 16px #183e8240}@media (max-width:600px){.guide-video{grid-template-columns:1fr;gap:18px;padding:20px}.guide-video-stage{margin-inline:auto}}