*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--teal:#0E7C7B;--teal-dark:#0C5F60;--teal-light:#CFF0EC;--teal-xlight:#ECFBF8;--bg:#FAF8F4;--border:#ECE7DF;--text:#1C1A14;--text2:#5E5849;--muted:#7C7567}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.65;-webkit-font-smoothing:antialiased}
html:lang(ja) body{font-family:-apple-system,BlinkMacSystemFont,'Hiragino Sans','Hiragino Kaku Gothic ProN','Yu Gothic','Noto Sans JP',sans-serif;line-height:1.8}
nav{background:#fff;border-bottom:1px solid var(--border)}
nav .wrap{max-width:860px;margin:0 auto;padding:0 20px;height:64px;display:flex;align-items:center;justify-content:space-between}
nav img{display:block;height:32px;width:auto}
.nav-links{display:flex;align-items:center;gap:16px}
.nav-links a{color:var(--teal-dark);font-weight:600;font-size:.92rem;text-decoration:none}
.nav-links a.nav-cta{background:var(--teal);color:#fff;padding:8px 16px;border-radius:999px;white-space:nowrap}
main{max-width:760px;margin:0 auto;padding:48px 24px 64px;background:#fff}
h1{font-size:clamp(1.7rem,4.5vw,2.3rem);line-height:1.15;font-weight:800;letter-spacing:-.02em;margin-bottom:12px}
.subtitle{color:var(--text2);font-size:1.08rem;margin-bottom:28px}
h2{font-size:1.28rem;line-height:1.3;color:var(--teal-dark);margin:34px 0 10px}
h3{font-size:1.04rem;margin:20px 0 6px}
p,li{color:var(--text2);font-size:1.02rem}
p{margin-bottom:14px}
ul,ol{margin:0 0 16px 22px}
li{margin-bottom:7px}
a{color:var(--teal-dark)}
strong{color:var(--text)}
table{width:100%;border-collapse:collapse;margin:16px 0 22px;font-size:.96rem}
th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--border);color:var(--text2)}
th{background:var(--teal-xlight);color:var(--teal-dark);font-size:.86rem}
.button,button{display:inline-block;background:var(--teal);color:#fff;font:inherit;font-weight:600;font-size:.95rem;text-decoration:none;border:0;cursor:pointer;padding:11px 20px;border-radius:999px;margin:0 8px 8px 0}
.button:hover,button:hover{background:var(--teal-dark)}
button.secondary{background:#fff;color:var(--teal-dark);border:1px solid var(--teal)}
.callout{background:var(--teal-xlight);border:1px solid var(--teal-light);border-radius:12px;padding:18px 22px;margin:22px 0}
.callout p:last-child{margin-bottom:0}
.warning{background:#FDF0EC;border:1px solid #F3C9BD;border-radius:12px;padding:18px 22px;margin:22px 0}
.warning p{color:var(--text)}
.warning p:last-child{margin-bottom:0}
.cta{background:linear-gradient(160deg,var(--teal),var(--teal-dark));border-radius:20px;padding:30px 28px;margin:36px 0 28px}
.cta h2{color:#fff;margin:0 0 8px}
.cta p{color:#fff;opacity:.93}
.badges{display:flex;flex-wrap:wrap;gap:12px;margin-top:6px}
.badges img{display:block;height:44px;width:auto}
.qr{display:none;align-items:center;gap:14px;margin-top:18px}
.qr img{width:96px;height:96px;flex:none;background:#fff;padding:4px;border-radius:10px}
.qr p{margin:0;max-width:240px;font-size:.86rem}
@media(hover:hover) and (min-width:861px){.qr{display:flex}}
.sources h2{font-size:1rem}
.sources li{font-size:.86rem;margin-bottom:4px}
.updated{font-size:.84rem;color:var(--muted);margin-top:24px;margin-bottom:4px}
.disclaimer{font-size:.84rem;color:var(--muted)}
footer{background:#fff;border-top:1px solid var(--border);text-align:center;padding:24px;font-size:.85rem;color:var(--muted)}
footer a{color:var(--teal);text-decoration:none}
.cards{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin:12px 0 26px}
.card{display:block;background:#fff;border:1px solid var(--border);border-radius:14px;padding:18px;text-decoration:none}
.card:hover{border-color:var(--teal)}
.card strong{display:block;margin-bottom:4px;color:var(--teal-dark)}
.card span{color:var(--text2);font-size:.92rem}
.calc-row{display:grid;grid-template-columns:32px 1fr 1fr;gap:10px;align-items:center;margin-bottom:8px;max-width:360px}
.calc-row span{color:var(--muted);font-size:.9rem}
.calc-row input{width:100%;font:inherit;padding:9px 10px;border:1px solid var(--border);border-radius:8px}
.calc-head{font-weight:600;font-size:.86rem;color:var(--teal-dark)}
#result{margin-top:20px}
.big{font-size:2.1rem;font-weight:800;color:var(--text);line-height:1.2}
@media(max-width:640px){.cards{grid-template-columns:1fr}main{padding:32px 18px 48px}}