:root{--ink:#123632;--green:#087c47;--deep:#00633b;--mint:#ecf8f4;--aqua:#eaf8fb;--yellow:#fff8d8;--line:#d9e9e2;--white:#fff;--shadow:0 20px 50px rgba(9,76,54,.10)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);font-family:"Hiragino Sans","Yu Gothic",Meiryo,sans-serif;line-height:1.8;background:#fff}a{color:inherit}img{display:block;max-width:100%}.site-header{height:72px;display:flex;align-items:center;justify-content:space-between;max-width:1120px;margin:auto;padding:0 24px}.brand{text-decoration:none;font-weight:800;letter-spacing:.05em}.brand span{display:inline-grid;place-items:center;width:24px;height:24px;border-radius:50%;background:#ffd94b;color:#274b3d;margin-right:8px}.mini-cta,.cta{display:inline-flex;align-items:center;justify-content:space-between;gap:34px;text-decoration:none;background:var(--green);color:#fff;font-weight:800;border-radius:8px;padding:15px 20px;transition:.2s}.mini-cta{font-size:14px;padding:10px 15px;border-radius:999px;gap:10px}.cta:hover,.mini-cta:hover{background:var(--deep);transform:translateY(-2px)}.hero{max-width:1200px;margin:0 auto 96px;padding:72px;min-height:580px;border-radius:0 0 32px 32px;background:linear-gradient(120deg,#effbfe 0 55%,#edfaef 55%);display:grid;grid-template-columns:.9fr 1.1fr;align-items:center;gap:70px}.eyebrow{color:#00736b;font-size:13px;font-weight:800;letter-spacing:.08em}.hero h1{font-size:clamp(40px,5vw,68px);line-height:1.25;letter-spacing:.02em;margin:18px 0 24px}.hero h1 em{font-style:normal;color:var(--green);background:linear-gradient(transparent 72%,#ffd94b 0)}.lead{font-size:18px}.hero-actions{margin-top:34px}.hero-actions p{font-size:13px;margin:8px 4px}.hero-visual img{width:100%;aspect-ratio:3/2;object-fit:cover;border-radius:24px;box-shadow:var(--shadow)}section{padding-left:24px;padding-right:24px}.section-intro{text-align:center;max-width:650px;margin:0 auto 40px}.section-intro h2,.story-band h2,.final-cta h2{font-size:clamp(30px,4vw,46px);line-height:1.4;margin:8px 0 14px}.age-guide{max-width:1040px;margin:0 auto 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@media(max-width:800px){.site-header{height:62px}.mini-cta{font-size:12px}.hero{margin-bottom:72px;padding:44px 24px;border-radius:0 0 22px 22px;grid-template-columns:1fr;gap:32px}.hero-visual{order:-1}.hero h1{font-size:38px}.lead{font-size:16px}.age-tabs{display:flex;overflow-x:auto;padding-bottom:6px}.age-tab{min-width:220px}.age-detail{padding:26px 18px}.age-heading{align-items:flex-start}.age-heading>span{min-width:62px;height:62px;font-size:15px}.age-heading h3{font-size:20px}.issue-grid{grid-template-columns:1fr}.story-band{grid-template-columns:1fr;gap:32px}.story-band img{order:2}.faq{grid-template-columns:1fr;gap:20px}.section-intro h2,.story-band h2,.final-cta h2{font-size:30px}.cta{width:100%;font-size:14px}.final-cta{padding-top:70px;padding-bottom:70px}}
@media(max-width:420px){.brand{font-size:14px}.mini-cta{padding:8px 10px}.hero{padding-top:28px}.hero h1{font-size:34px}.age-guide{padding-left:16px;padding-right:16px}.age-heading{display:block}.age-heading>span{margin-bottom:14px}.story-band{padding-left:18px;padding-right:18px}}
.hero-support{font-size:1rem;font-weight:700;color:var(--green);margin:20px 0 0}
.start-guide{max-width:1040px;margin:0 auto 100px}.start-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.start-grid article{padding:28px;border:1px solid var(--line);border-radius:18px;background:var(--mint)}.start-grid article:nth-child(2){background:var(--yellow)}.start-grid article:nth-child(3){background:var(--aqua)}.start-label{font-size:.875rem;font-weight:800;color:var(--deep)}.start-grid h3{font-size:1.4rem;line-height:1.6;margin:12px 0}.start-grid p{font-size:1rem;margin:0;color:#39534e}.start-note{font-size:.875rem;line-height:1.8;color:#48605b;margin:20px 0 0}
@media(max-width:800px){.start-guide{margin-bottom:72px}.start-grid{grid-template-columns:1fr;gap:12px}.start-grid article{padding:24px}.start-grid h3{font-size:1.25rem}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.cta,.mini-cta,.age-tab,.toast{transition:none}}