:root{color-scheme:light dark;--bg:#f5f7fb;--surface:#fff;--ink:#172033;--muted:#5f6878;--brand:#075fac;--brand-soft:#e8f2fc;--line:#dfe5ec;--success:#e8f7ed;--warning:#fff4dd}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Hiragino Sans","Noto Sans JP",sans-serif;line-height:1.65}
a{color:var(--brand);text-underline-offset:3px}.wrap{width:min(1080px,calc(100% - 32px));margin:auto}.topbar{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:18px 0}.topbar .brand{font-weight:800;text-decoration:none}.language{display:flex;gap:8px}.language a,.language span{padding:7px 12px;border:1px solid var(--line);border-radius:999px;text-decoration:none;font-size:.88rem}.language [aria-current=page]{background:var(--ink);color:var(--surface);border-color:var(--ink);font-weight:750}
.hero{padding:clamp(28px,6vw,66px);border-radius:28px;background:linear-gradient(135deg,#dff0ff,#fff 58%,#edf1ff);box-shadow:0 16px 44px rgba(24,54,91,.08)}.eyebrow{margin:0 0 8px;color:var(--brand);font-weight:800;letter-spacing:.08em;text-transform:uppercase;font-size:.8rem}.hero h1{margin:0;font-size:clamp(2.1rem,6vw,4rem);line-height:1.06;letter-spacing:-.04em}.lead{max-width:760px;color:var(--muted);font-size:1.08rem}.hero-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}.button{display:inline-flex;align-items:center;gap:7px;padding:11px 16px;border-radius:999px;background:var(--brand);color:white;text-decoration:none;font-weight:750}.button.secondary{background:var(--surface);color:var(--brand);border:1px solid #bfd5eb}
.manual-nav{display:flex;gap:8px;overflow:auto;padding:18px 0 6px;scrollbar-width:thin}.manual-nav a{white-space:nowrap;padding:8px 12px;border-radius:999px;background:var(--surface);border:1px solid var(--line);text-decoration:none;font-size:.9rem}.manual-nav a[aria-current=page]{background:var(--brand);color:#fff;border-color:var(--brand)}
main{padding:24px 0 54px}h2{font-size:clamp(1.55rem,3.5vw,2.25rem);line-height:1.2;margin:2.4em 0 .65em;scroll-margin-top:20px}h3{font-size:1.18rem;margin:1.5em 0 .45em}p{margin:.55em 0}ul,ol{padding-left:1.45em}li+li{margin-top:.38em}.section-intro{max-width:780px;color:var(--muted)}
.menu-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin:22px 0}.menu-card{display:block;padding:20px;border:1px solid var(--line);border-radius:20px;background:var(--surface);text-decoration:none;color:var(--ink);box-shadow:0 8px 24px rgba(26,52,85,.05)}.menu-card:hover,.menu-card:focus-visible{border-color:#78aedd;transform:translateY(-2px)}.menu-card .icon{font-size:1.6rem}.menu-card h2{font-size:1.18rem;margin:.55em 0 .25em}.menu-card p{color:var(--muted);font-size:.92rem}.tag{display:inline-block;padding:3px 8px;border-radius:999px;background:var(--brand-soft);color:var(--brand);font-size:.76rem;font-weight:750}
.screen{display:grid;grid-template-columns:minmax(210px,300px) 1fr;gap:26px;align-items:start;margin:22px 0;padding:20px;border:1px solid var(--line);border-radius:22px;background:var(--surface)}.screen.reverse{grid-template-columns:1fr minmax(210px,300px)}.screen img{display:block;width:100%;height:auto;border-radius:16px;background:#edf0f4;box-shadow:0 12px 30px rgba(20,35,60,.12)}.screen .copy h2,.screen .copy h3{margin-top:0}.screen figure{margin:0}.screen figcaption{color:var(--muted);font-size:.82rem;margin-top:8px}
.steps{counter-reset:step;list-style:none;padding:0}.steps>li{counter-increment:step;position:relative;padding:0 0 1.1em 3.05em;min-height:2.7em}.steps>li:before{content:counter(step);position:absolute;left:0;top:.05em;width:2.15em;height:2.15em;display:grid;place-items:center;border-radius:50%;background:var(--brand);color:#fff;font-weight:800}
.callout{margin:18px 0;padding:16px 18px;border-left:5px solid var(--brand);border-radius:14px;background:var(--brand-soft)}.callout.success{background:var(--success)}.callout.warning{background:var(--warning)}.feature-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;padding:0;list-style:none}.feature-list li{margin:0;padding:14px 16px;border:1px solid var(--line);border-radius:14px;background:var(--surface)}.feature-list strong{display:block;margin-bottom:3px}.coverage{padding:20px;border-radius:18px;background:var(--surface);border:1px solid var(--line)}.coverage-meter{height:10px;border-radius:99px;background:#dfe5ec;overflow:hidden}.coverage-meter span{display:block;width:88%;height:100%;background:#22a15b}.small{font-size:.88rem;color:var(--muted)}
.prev-next{display:flex;justify-content:space-between;gap:12px;margin-top:42px}.prev-next a{padding:12px 15px;border-radius:14px;background:var(--surface);border:1px solid var(--line);text-decoration:none;font-weight:700}footer{padding:24px 0 42px;border-top:1px solid var(--line);color:var(--muted);font-size:.9rem}footer nav{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:8px}
@media(max-width:780px){.wrap{width:min(100% - 24px,1080px)}.topbar{align-items:flex-start}.hero{padding:28px 22px;border-radius:22px}.menu-grid{grid-template-columns:1fr}.screen,.screen.reverse{grid-template-columns:1fr}.screen img{max-width:290px;margin:auto}.feature-list{grid-template-columns:1fr}.prev-next{flex-direction:column}.prev-next a{text-align:center}}
@media(prefers-color-scheme:dark){:root{--bg:#111820;--surface:#1d2732;--ink:#f4f7fb;--muted:#b1bac7;--brand:#6db9fa;--brand-soft:#182f43;--line:#344353;--success:#183829;--warning:#42351d}.hero{background:linear-gradient(135deg,#153149,#1d2732 58%,#202743)}.button{color:#0d2031}.button.secondary{color:var(--brand)}.language [aria-current=page]{background:#f4f7fb;color:#172033;border-color:#f4f7fb}}