:root{--green:#087f62;--dark:#075444;--soft:#eaf7f2;--ink:#1e2d31;--muted:#627177;--line:#d9e6e1;--yellow:#f4c84a;--shadow:0 18px 48px rgba(10,73,60,.13)}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:#f7fbf9;font-family:-apple-system,BlinkMacSystemFont,"Hiragino Sans","Yu Gothic UI","Yu Gothic",Meiryo,sans-serif;font-size:16px;line-height:1.8;padding-bottom:72px}
a{color:inherit;touch-action:manipulation}
.wrap{width:min(960px,calc(100% - 32px));margin:auto}
.topbar{background:var(--dark);color:#fff;text-align:center;font-size:.82rem;font-weight:700;padding:7px 12px}
header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.96);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.header-inner{height:64px;display:flex;align-items:center;justify-content:space-between;gap:14px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--dark);font-weight:900}
.brand img{width:42px;height:42px;border-radius:50%;object-fit:cover}
.back{color:var(--green);font-size:.9rem;font-weight:850;text-decoration:none}
.intro{padding:42px 0 28px;background:linear-gradient(145deg,#f8fffc,#dff2ec)}
.eyebrow{margin:0 0 7px;color:var(--green);font-size:.8rem;font-weight:900;letter-spacing:.12em}
h1{margin:0 0 12px;color:var(--dark);font-size:clamp(2rem,10vw,3.6rem);line-height:1.25}
.lead{margin:0;color:#42595f;font-weight:650}
.overview{padding:42px 0 26px;background:#fff}
.overview h2{margin:0 0 12px;color:var(--dark);font-size:clamp(1.55rem,7vw,2.25rem);line-height:1.4}
.overview-lead{margin:0 0 22px;color:var(--muted)}
.summary-grid{display:grid;gap:12px}
.summary-card{padding:18px;border:1px solid var(--line);border-radius:17px;background:#fff;box-shadow:0 8px 22px rgba(16,71,59,.05)}
.summary-card span{display:block;margin-bottom:4px;color:var(--green);font-size:.78rem;font-weight:900;letter-spacing:.08em}
.summary-card h3{margin:0 0 5px;color:var(--dark);font-size:1.08rem;line-height:1.45}
.summary-card p{margin:0;color:var(--muted);font-size:.96rem}
.guide{padding:26px 0 56px}
.guide-details{max-width:864px;margin:auto}
.guide-details summary{list-style:none;cursor:pointer;min-height:58px;padding:14px 18px;border-radius:15px;background:var(--dark);color:#fff;display:flex;align-items:center;justify-content:space-between;font-weight:900}
.guide-details summary::-webkit-details-marker{display:none}.guide-details summary:after{content:"＋";font-size:1.35rem}.guide-details[open] summary:after{content:"−"}
.guide-frame{position:relative;max-width:864px;margin:14px auto 0;overflow:hidden;border:1px solid #cfe2db;border-radius:22px;background:#fff;box-shadow:var(--shadow)}
.guide-frame img{width:100%;height:auto;display:block}
.caption{max-width:864px;margin:14px auto 0;color:var(--muted);font-size:.88rem}
.notice{max-width:864px;margin:24px auto 0;padding:18px;border-radius:16px;background:var(--soft);border:1px solid #c7e0d7;color:#36524c}
.notice strong{display:block;color:var(--dark)}
.actions{max-width:680px;margin:26px auto 0;display:grid;gap:10px}
.btn{min-height:56px;border-radius:14px;padding:13px 18px;display:flex;align-items:center;justify-content:center;text-align:center;text-decoration:none;font-weight:900}
.primary{background:var(--green);color:#fff;box-shadow:0 12px 24px rgba(8,127,98,.22)}
.light{background:#fff;color:var(--dark);border:1px solid #bddbd1}
.related{padding:48px 0;background:#fff}
.related h2{margin:0 0 18px;color:var(--dark);font-size:1.45rem}
.links{display:grid;gap:10px}
.links a{padding:15px 17px;border-radius:14px;background:var(--soft);color:var(--dark);text-decoration:none;font-weight:850}
footer{padding:28px 0;background:#052f29;color:#bdd0ca;text-align:center;font-size:.82rem}
.bottom{position:fixed;bottom:0;left:0;right:0;z-index:25;display:grid;grid-template-columns:repeat(3,1fr);background:#fff;border-top:1px solid var(--line)}
.bottom a{min-height:64px;display:grid;place-items:center;text-align:center;text-decoration:none;font-weight:900;color:var(--dark)}
.bottom .line{background:var(--green);color:#fff}
@media(min-width:720px){body{padding-bottom:0}.summary-grid{grid-template-columns:repeat(2,1fr)}.actions{grid-template-columns:1fr 1fr}.links{grid-template-columns:repeat(3,1fr)}.bottom{display:none}.intro{padding:58px 0 38px}.overview{padding:60px 0 32px}.guide{padding:30px 0 76px}}