:root{--main:#176b72;--main2:#0f555b;--sub:#62c6c2;--accent:#f3a43b;--ink:#17343d;--muted:#647b80;--bg:#f6faf9;--white:#fff;--line:#dfeae8;--soft:#eaf6f4;--soft2:#fff6e8;--shadow:0 18px 48px rgba(23,52,61,.10);--radius:22px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP","Hiragino Sans","Yu Gothic",sans-serif;color:var(--ink);background:var(--bg);line-height:1.8}a{color:inherit;text-decoration:none}.container{width:min(1120px,calc(100% - 36px));margin:auto}.muted{color:var(--muted)}
header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}.nav{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:11px;font-weight:900;letter-spacing:.06em}.brandmark{width:42px;height:42px;border-radius:14px;background:linear-gradient(135deg,var(--main),var(--sub));color:#fff;display:grid;place-items:center;font-size:20px}.brand small{display:block;font-size:10px;color:var(--muted);letter-spacing:.03em}.navlinks{display:flex;align-items:center;gap:18px;font-size:13px;font-weight:800}.navlinks a:hover{color:var(--main)}.nav-cta{padding:9px 15px;border-radius:999px;background:var(--accent);color:#fff!important}
.hero{padding:76px 0 56px;background:radial-gradient(circle at 85% 15%,rgba(98,198,194,.25),transparent 29%),radial-gradient(circle at 12% 90%,rgba(243,164,59,.10),transparent 25%),linear-gradient(#fff,#f8fbfa)}.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}.eyebrow,.tag{display:inline-flex;align-items:center;padding:6px 11px;border-radius:999px;background:var(--soft);color:var(--main);font-size:11px;font-weight:900;letter-spacing:.06em}.tag.orange{background:var(--soft2);color:#9a650f}.hero h1{font-size:clamp(38px,5vw,64px);line-height:1.15;letter-spacing:-.035em;margin:16px 0 18px}.hero p{font-size:17px;color:var(--muted);max-width:720px}.hero-card{background:#fff;border:1px solid var(--line);border-radius:28px;padding:26px;box-shadow:var(--shadow)}.hero-card h3{margin-top:0}.quick{display:grid;grid-template-columns:repeat(2,1fr);gap:11px}.quick a{padding:16px;border:1px solid var(--line);border-radius:16px;background:#fbfdfd}.quick a:hover{border-color:#b7dcd7;transform:translateY(-2px)}.quick b{display:block}.quick span{font-size:12px;color:var(--muted)}
.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:13px;padding:13px 20px;font-weight:900;border:0}.btn-main{background:var(--main);color:#fff}.btn-main:hover{background:var(--main2)}.btn-accent{background:var(--accent);color:#fff}.btn-light{background:#fff;border:1px solid var(--line)}.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px}
section{padding:68px 0}.section-title{max-width:760px;margin:0 auto 30px;text-align:center}.kicker{font-size:11px;letter-spacing:.14em;font-weight:900;color:var(--main)}.section-title h2{font-size:clamp(28px,3.3vw,42px);line-height:1.25;margin:7px 0 9px}.section-title p{margin:0;color:var(--muted)}
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 8px 24px rgba(23,52,61,.04)}a.card{transition:.2s}a.card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}.icon{width:48px;height:48px;border-radius:15px;background:var(--soft);display:grid;place-items:center;font-size:23px}.card h3{font-size:18px;line-height:1.45;margin:12px 0 7px}.card p{font-size:13px;color:var(--muted);margin:0}.more{display:inline-block;margin-top:14px;color:var(--main);font-weight:900;font-size:13px}
.soft{background:#edf8f6}.dark{background:#10282f;color:#fff}.dark p{color:#c5d4d7}.notice{padding:17px 19px;border-radius:16px;background:var(--soft2);border:1px solid #f0ddb8;color:#76531b;font-size:13px}.notice strong{display:block;color:#62440e}.list{padding-left:20px;color:var(--muted)}.list li{margin:7px 0}.dark .list{color:#c5d4d7}
.article-list{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.article-card{background:#fff;border:1px solid var(--line);border-radius:22px;overflow:hidden;display:flex;flex-direction:column}.article-thumb{height:150px;background:linear-gradient(135deg,#dff4f1,#fff1da);display:grid;place-items:center;font-size:44px}.article-body{padding:20px;display:flex;flex-direction:column;flex:1}.article-body h3{font-size:18px;line-height:1.5;margin:8px 0}.article-body p{font-size:13px;color:var(--muted);margin:0}.article-body .more{margin-top:auto;padding-top:14px}
.article-hero{padding:62px 0 34px;background:#fff}.breadcrumbs{font-size:12px;color:var(--muted);margin-bottom:18px}.article-wrap{display:grid;grid-template-columns:minmax(0,760px) 1fr;gap:32px;align-items:start}.article{background:#fff;border:1px solid var(--line);border-radius:24px;padding:clamp(24px,4vw,48px)}.article h1{font-size:clamp(30px,4vw,48px);line-height:1.3;margin:12px 0 14px}.article h2{font-size:25px;line-height:1.45;margin:38px 0 12px;padding-top:8px;border-top:1px solid var(--line)}.article h3{font-size:19px;margin:25px 0 8px}.article p{margin:0 0 16px}.article ul,.article ol{padding-left:22px}.article li{margin:7px 0}.lead{font-size:17px;color:#49636a}.toc{padding:18px;background:var(--soft);border-radius:16px;margin:24px 0}.toc b{display:block;margin-bottom:8px}.toc a{display:block;color:var(--main);font-size:13px;margin:5px 0}.sidebar{position:sticky;top:96px}.sidebox{background:#fff;border:1px solid var(--line);border-radius:20px;padding:20px;margin-bottom:16px}.sidebox h3{margin-top:0}.sidebox a{display:block;font-size:13px;color:var(--main);font-weight:800;margin:9px 0}
.policy{background:#fff;border:1px solid var(--line);border-radius:24px;padding:clamp(24px,4vw,44px)}.policy h2{margin-top:34px;font-size:22px}.policy h2:first-child{margin-top:0}
footer{background:#10282f;color:#d5e0e2;padding:44px 0}.footer-grid{display:grid;grid-template-columns:1.35fr repeat(3,1fr);gap:26px}.footer-grid h4{color:#fff;margin-top:0}.footer-grid a{display:block;color:#bdd0d3;font-size:13px;margin:7px 0}.footnote{font-size:11px;color:#89a1a6}.disclosure{margin-top:18px;padding-top:15px;border-top:1px solid rgba(255,255,255,.1);font-size:11px;color:#8fa7ac}
@media(max-width:960px){.navlinks{display:none}.hero-grid,.article-wrap{grid-template-columns:1fr}.sidebar{position:static}.grid3,.article-list{grid-template-columns:repeat(2,1fr)}.grid4{grid-template-columns:repeat(2,1fr)}}@media(max-width:640px){.container{width:min(100% - 24px,1120px)}.hero{padding-top:48px}.grid2,.grid3,.grid4,.article-list,.quick{grid-template-columns:1fr}.actions .btn{width:100%}.footer-grid{grid-template-columns:1fr}.article{padding:22px}}