
:root{color-scheme:dark;--bg:#0d171c;--surface:#15262b;--line:#2c4146;--text:#edf4f2;--muted:#b0c3c2;--accent:#a9e6d6}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.85 -apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP",sans-serif}a{color:var(--accent);text-underline-offset:4px}a:hover{color:white}a:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:5px}.shell{width:min(1120px,calc(100% - 40px));margin:auto}.site-header{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:26px 0;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;color:var(--text);font-size:21px;font-weight:750;text-decoration:none}.brand img{width:42px;height:42px;border-radius:12px}.nav,.footer-links{display:flex;flex-wrap:wrap;gap:12px 24px}.nav a{font-size:14px}.page-main{max-width:820px;margin:70px auto 90px;padding:0 24px}.eyebrow{color:var(--accent);font-size:13px;letter-spacing:.15em;text-transform:uppercase;font-weight:700}h1,h2,h3{line-height:1.45}h1{font-size:clamp(30px,5vw,48px);letter-spacing:-.03em;margin:12px 0 22px}h2{font-size:23px;margin:46px 0 16px}h3{font-size:18px;margin:28px 0 12px}p,li{overflow-wrap:anywhere}.updated,.muted{color:var(--muted);font-size:14px}li+li{margin-top:10px}.notice,.contact-card{padding:22px 24px;background:var(--surface);border:1px solid var(--line);border-radius:16px}.notice{border-left:3px solid var(--accent)}.contact-card p{margin:8px 0}.site-footer{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;border-top:1px solid var(--line);padding:30px 0 40px;font-size:13px;color:var(--muted)}.hero{display:grid;grid-template-columns:1.5fr 1fr;align-items:center;gap:72px;padding:85px 0 70px}.hero h1{font-size:clamp(38px,5vw,64px);line-height:1.35}.hero .lead{font-size:19px;color:var(--muted);max-width:560px}.hero-art{position:relative;padding:40px;text-align:center;border:1px solid var(--line);border-radius:40px;background:radial-gradient(ellipse at top,#284c48 0%,#14272c 50%,#0d171c 100%)}.hero-art img{width:min(100%,230px);height:auto;border-radius:48px}.hero-art p{color:var(--accent);font-size:15px;letter-spacing:.1em}.badge{display:inline-block;padding:5px 13px;background:#1c3637;border-radius:100px;color:var(--accent);font-size:13px}.button{display:inline-block;padding:12px 22px;background:var(--accent);color:#102725;border-radius:12px;font-weight:700;text-decoration:none}.button:hover{background:#d1f4ea;color:#102725}.actions{display:flex;gap:20px;align-items:center;flex-wrap:wrap;margin-top:28px}.section{padding:24px 0 60px}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.feature{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:25px}.feature .number{color:var(--accent);font-size:13px}.feature h3{margin-top:12px}.feature p{font-size:15px;color:var(--muted)}.split{display:grid;grid-template-columns:1fr 1fr;gap:35px}.pro-list{padding-left:22px}.faq{margin:14px 0;border:1px solid var(--line);border-radius:14px;background:var(--surface)}summary{padding:19px 22px;cursor:pointer;font-weight:650}.answer{padding:0 22px 18px}.answer p:first-child{margin-top:0}.table-scroll{overflow-x:auto}table{border-collapse:collapse;width:100%;font-size:14px}th,td{text-align:left;vertical-align:top;border-bottom:1px solid var(--line);padding:14px 12px}th{color:var(--accent)}.skip{position:absolute;top:-60px;left:16px;padding:8px;background:var(--accent);color:var(--bg)}.skip:focus{top:8px}@media(max-width:700px){.shell{width:calc(100% - 36px)}.site-header{gap:16px;align-items:flex-start;flex-direction:column;padding:20px 0}.nav{gap:10px 20px}.hero{grid-template-columns:1fr;padding:48px 0 30px;gap:30px}.hero-art{max-width:340px;justify-self:center;width:100%;padding:25px}.hero-art img{max-width:170px;border-radius:36px}.hero h1{font-size:40px}.grid,.split{grid-template-columns:1fr}.page-main{margin:42px auto 60px;padding:0 20px}h2{font-size:21px}.notice,.contact-card{padding:18px}.section{padding-bottom:35px}}
