:root{font-family:Meiryo,'Hiragino Kaku Gothic ProN','Noto Sans JP','Yu Gothic',system-ui,sans-serif;color:#213e43;background:#f5f9f8;font-synthesis:none}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;line-height:1.8}a{color:#0b756a}a:focus-visible{outline:3px solid #198c79;outline-offset:4px}.wrap{width:min(1100px,calc(100% - 40px));margin:auto}.top{background:#fff;border-bottom:1px solid #dce9e6}.top-inner{min-height:70px;display:flex;justify-content:space-between;align-items:center;gap:16px}.brand{font-weight:800;text-decoration:none;color:#164b49}.draft{font-size:12px;border:1px solid #bbd3cf;background:#eaf4f1;padding:5px 12px;border-radius:999px;white-space:nowrap}.hero{padding:58px 0 40px}.eyebrow,.kicker{color:#168477;font-size:12px;font-weight:800;letter-spacing:.08em}.hero h1{font-size:clamp(30px,4.8vw,53px);line-height:1.3;letter-spacing:-.012em;margin:12px 0 24px;max-width:920px}.hero em{font-style:normal;color:#127b70}.lead{font-size:17px;color:#527078;max-width:820px}.cta-line{display:flex;gap:15px;align-items:center;flex-wrap:wrap;margin-top:28px}.primary{display:inline-flex;justify-content:space-between;align-items:center;gap:18px;text-decoration:none;background:#126a61;color:#fff;font-weight:800;padding:13px 20px;border-radius:10px;box-shadow:0 5px 12px #143f3522}.primary:hover{background:#0d554e}.small{font-size:13px;color:#637980}.summary{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin:4px 0 45px}.summary>div{border:1px solid #d7e9e3;border-radius:14px;padding:21px;background:#fff;min-width:0}.summary span{font-size:11px;color:#1b867b;font-weight:700;display:block}.summary strong{font-size:18px}.summary p{color:#627d7c;font-size:13px;margin:5px 0 0}.layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:30px;align-items:start}.layout>article{min-width:0}.section{background:#fff;border:1px solid #dce8e6;border-radius:16px;padding:28px;margin:0 0 24px}.section h2{font-size:24px;line-height:1.5;margin:6px 0 20px}.section h3{font-size:16px;margin:10px 0}.section p{font-size:15px;color:#526b72}.steps{padding-left:24px}.steps li{padding:1px 0 12px 8px}.steps li::marker{font-weight:800;color:#118277}.steps p{margin:0 0 14px}.callout{background:#eff9f6;border-left:4px solid #3ab3a2;border-radius:0 10px 10px 0;padding:15px 18px}.callout p{margin:5px 0 0}.table-scroll{overflow-x:auto}table{width:100%;min-width:540px;border-collapse:collapse;font-size:13px;text-align:left}th,td{border-bottom:1px solid #e1eae8;padding:13px 11px;vertical-align:top}thead th{background:#eaf5f1;font-weight:800}tbody th{width:24%;font-weight:800}.checklist{padding-left:24px}.checklist li{padding-bottom:10px}.source ul{padding-left:20px}.source li{padding-bottom:12px;overflow-wrap:anywhere}.sticky{position:sticky;top:18px;background:#fff;border:1px solid #cae1dc;border-radius:16px;padding:25px;box-shadow:0 12px 26px #123f3920}.sticky h2{font-size:22px;line-height:1.4}.sticky .primary{width:100%;font-size:14px}.sticky p{color:#5d7779}.foot{margin-top:30px;border-top:1px solid #dce6e3;padding:23px 0;color:#61797c;font-size:12px}@media(max-width:850px){.layout{grid-template-columns:1fr}.sticky{position:static}.summary{grid-template-columns:1fr}.hero{padding-top:38px}.section{padding:22px}}@media(max-width:480px){.wrap{width:calc(100% - 28px)}.hero h1{font-size:32px}.lead{font-size:15px}.top-inner{min-height:60px}.brand{font-size:14px}.draft{font-size:10px;padding:4px 8px}.section h2{font-size:21px}.section{padding:17px}.cta-line .primary{width:100%;font-size:14px}}

/* H99: Japanese text hierarchy, legible contrast and concise FAQs. */
html{font-size:16px}body{line-height:1.85;letter-spacing:.01em;-webkit-font-smoothing:antialiased}
.lead,.section p,.steps p,.source li,.sticky p{color:#35525a;font-size:16px;line-height:1.9}
.small,.foot{font-size:14px;color:#415d64;line-height:1.8}
.eyebrow,.kicker,.summary span{font-size:13px}
.hero{padding:40px 0 27px}.hero h1{font-size:clamp(28px,4.2vw,46px);letter-spacing:-.01em;margin:10px 0 15px}
.summary{gap:12px;margin-bottom:25px}.summary>div{padding:17px}.summary span{color:#125e56}.summary p{font-size:14px}
.section{padding:25px;margin-bottom:18px}.section h2{font-size:23px;margin-bottom:16px;line-height:1.5}
.section h3,.steps h3{font-size:17px;line-height:1.65}
.sticky h2{font-size:22px}.primary{font-size:15px;min-height:47px;align-items:center}
.steps li{padding-bottom:13px}.callout{padding:15px}
table{font-size:14px}th,td{padding:12px 10px;line-height:1.65}
.guide-faq{border-top:1px solid #d5e4e1}.guide-faq:last-of-type{border-bottom:1px solid #d5e4e1}
.guide-faq summary{color:#1b5d56;font-size:16px;font-weight:700;padding:17px 4px;cursor:pointer;line-height:1.7}
.guide-faq summary:focus-visible{outline:3px solid #168477;outline-offset:3px}
.guide-faq p{padding:0 6px 15px;margin:0}
@media(max-width:480px){.hero{padding-top:26px}.hero h1{font-size:30px}.lead{font-size:16px}.wrap{width:calc(100% - 30px)}.section{padding:18px}.section h2{font-size:21px}.summary>div{padding:16px}.draft{font-size:12px}}