:root{--ink:#2A2238;--paper:#FBF8F5;--accent:#D6A33E;--shadow:#94701F;--sub:#5F5670;--line:#EAE3EE;--danger:#B3342E}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--ink);color:var(--ink);font:400 16px/1.85 "Hiragino Sans","Hiragino Kaku Gothic ProN","Noto Sans JP","Yu Gothic",Meiryo,sans-serif;overflow-wrap:anywhere}
a{color:var(--ink);text-decoration-color:var(--shadow);text-decoration-thickness:2px;text-underline-offset:3px}
a:focus-visible,summary:focus-visible,.btn:focus-visible{outline:3px solid var(--ink);outline-offset:3px;box-shadow:0 0 0 6px var(--accent)}
.skip{position:absolute;left:-999px;top:8px;background:var(--accent);color:var(--ink);padding:8px 14px;border-radius:8px;z-index:9}
.skip:focus{left:8px}
.hero{position:relative;overflow:hidden;color:var(--paper);padding:28px 20px 76px}
.hero svg.deco{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
.hero-in{position:relative;max-width:720px;margin:0 auto}
.brand{display:flex;align-items:center;gap:16px}
.icon{flex:none;width:76px;height:76px;border-radius:19px;background:var(--paper);border:3px solid var(--paper);box-shadow:5px 5px 0 var(--accent);transform:rotate(-4deg);display:block}
.brand h1{margin:0;font-size:24px;line-height:1.3;font-weight:800}
.brand p{margin:4px 0 0;font-size:14px;line-height:1.6;opacity:.88}
.tabs{display:flex;gap:8px;margin:24px 0 0;padding:0;list-style:none;flex-wrap:wrap}
.tabs a{display:block;padding:8px 14px;border:2px solid var(--paper);border-radius:999px;color:var(--paper);text-decoration:none;font-size:14px;font-weight:700;line-height:1.5;min-height:44px;display:flex;align-items:center}
.tabs a[aria-current=page]{background:var(--accent);border-color:var(--accent);color:var(--ink)}
.sheet{position:relative;background:var(--paper);border-radius:28px 28px 0 0;margin-top:-40px;padding:32px 20px 56px}
.sheet-in{max-width:720px;margin:0 auto}
.sheet h2.title{margin:0 0 6px;font-size:26px;line-height:1.4;font-weight:800}
.date{margin:0 0 20px;color:var(--sub);font-size:14px}
.lead{margin:0 0 28px;padding:16px 18px;background:var(--line);border-radius:16px;border-left:6px solid var(--accent)}
.toc{margin:0 0 32px;padding:16px 18px 16px 18px;border:2px solid var(--line);border-radius:16px}
.toc b{font-size:14px;color:var(--sub)}
.toc ol{margin:6px 0 0;padding-left:1.4em}
.toc li{margin:2px 0}
section{margin:0 0 32px}
section h3{display:flex;align-items:flex-start;gap:10px;margin:0 0 8px;font-size:19px;line-height:1.5;font-weight:800}
section h3 .n{flex:none;min-width:30px;height:30px;margin-top:2px;border-radius:50%;background:var(--accent);box-shadow:2px 2px 0 var(--shadow);display:grid;place-items:center;font-size:14px;font-weight:800;line-height:1}
section p,section ul,section ol{margin:0 0 12px}section li{margin:6px 0}
section ul,section ol{padding-left:1.4em}
.box{margin:0 0 12px;padding:14px 16px;border:2px solid var(--line);border-radius:14px;background:#fff}
table{border-collapse:collapse;width:100%;font-size:15px;line-height:1.6;margin:0 0 12px}
th,td{border:2px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
th{background:var(--line)}
.contact{display:block;margin:0 0 28px;padding:20px;border-radius:20px;background:var(--ink);color:var(--paper)}
.contact p{margin:0 0 12px}.contact .addr{margin:12px 0 0;font-size:15px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:10px 20px;border-radius:14px;background:var(--accent);color:var(--ink);font-weight:800;text-decoration:none;box-shadow:4px 4px 0 var(--shadow);max-width:100%}
.btn:active{transform:translate(2px,2px);box-shadow:2px 2px 0 var(--shadow)}
.fig{margin:0 0 28px;padding:16px;border-radius:20px;background:var(--line);text-align:center}
.fig svg{display:block;width:100%;max-width:420px;height:auto;margin:0 auto}
.fig figcaption{margin-top:8px;font-size:14px;color:var(--sub)}
details{margin:0 0 10px;border:2px solid var(--line);border-radius:14px;background:#fff}
summary{cursor:pointer;padding:12px 16px;min-height:48px;font-weight:700;list-style:none;display:flex;gap:10px;align-items:flex-start}
summary::-webkit-details-marker{display:none}
summary::before{content:"+";flex:none;width:24px;height:24px;margin-top:2px;border-radius:50%;background:var(--accent);display:grid;place-items:center;font-weight:800;line-height:1}
details[open] summary::before{content:"−"}
details .a{padding:0 16px 14px 50px}
details .a p{margin:0 0 8px}
.foot{background:var(--paper);border-top:2px solid var(--line);padding:20px 20px 40px;color:var(--sub);font-size:14px}
.foot-in{max-width:720px;margin:0 auto}
.foot a{color:var(--sub)}
.apps{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.apps a{display:flex;align-items:center;gap:14px;padding:14px;border:2px solid var(--line);border-radius:18px;background:#fff;text-decoration:none}
.apps img{width:56px;height:56px;border-radius:14px;flex:none}
.apps b{display:block;font-size:17px}
.apps span{font-size:14px;color:var(--sub)}
@media (min-width:720px){.hero{padding:44px 32px 96px}.icon{width:96px;height:96px;border-radius:24px}.brand h1{font-size:32px}.sheet{padding:44px 32px 72px}.sheet h2.title{font-size:32px}}
@media (prefers-reduced-motion:no-preference){.icon{transition:transform .2s}.icon:hover{transform:rotate(0)}}