:root{--ink:#0f2a2c;--ink-soft:#3d5a5c;--muted:#6b8284;--bg:#f6f8f5;--surface:#ffffff;--line:#dde6e1;--teal:#123739;--teal-2:#1d5254;--mint:#b7e0c6;--mint-soft:#e5f3ea;--accent:#2e8b6a;--warn-bg:#fff7e6;--warn-line:#f0d9a8;--radius:18px;--maxw:1120px;--font:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;--mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace}
@media (prefers-color-scheme:dark){:root{--ink:#e6f0ec;--ink-soft:#b9cbc5;--muted:#8fa6a0;--bg:#0b1a1b;--surface:#112426;--line:#22393b;--mint-soft:#163a33;--accent:#7fd1a8;--warn-bg:#2a2414;--warn-line:#5a4a22}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.6;font-size:17px}
img{max-width:100%;display:block}
a{color:var(--accent);text-underline-offset:3px}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.top{position:sticky;top:0;z-index:10;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:19px;color:var(--ink);text-decoration:none;letter-spacing:-.01em}
.brand img{width:34px;height:34px;border-radius:9px}
.nav{display:flex;gap:22px;font-size:15px}
.nav a{color:var(--ink-soft);text-decoration:none}
.nav a:hover{color:var(--ink)}
@media (max-width:720px){.nav .opt{display:none}}
.btn{display:inline-flex;align-items:center;gap:10px;padding:13px 22px;border-radius:999px;font-weight:600;font-size:16px;text-decoration:none;border:1px solid transparent;transition:transform .15s ease}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--mint);color:var(--teal)}
.btn-ghost{border-color:rgba(255,255,255,.35);color:#fff}
.btn-dark{background:var(--teal);color:#fff}
.badge{display:inline-block;font-size:13px;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:var(--mint);background:rgba(183,224,198,.12);border:1px solid rgba(183,224,198,.3);padding:5px 12px;border-radius:999px}
.hero{background:radial-gradient(1200px 500px at 85% -10%,#2a6a63 0%,transparent 60%),linear-gradient(160deg,#123739 0%,#0c2526 100%);color:#fff;overflow:hidden}
.hero .wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;padding-top:72px;padding-bottom:84px}
.hero h1{font-size:clamp(36px,5.4vw,60px);line-height:1.05;letter-spacing:-.025em;margin:18px 0 18px}
.hero h1 em{font-style:normal;color:var(--mint)}
.hero p.lead{font-size:clamp(17px,2vw,20px);color:#cfe3da;max-width:34em;margin:0 0 28px}
.hero .ctas{display:flex;flex-wrap:wrap;gap:12px}
.hero .note{margin-top:18px;font-size:14px;color:#9fbfb3}
@media (max-width:880px){.hero .wrap{grid-template-columns:1fr;padding-top:48px;padding-bottom:56px}}
.seal{position:relative;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:26px;padding:22px;box-shadow:0 30px 80px rgba(0,0,0,.35)}
.seal .photo{aspect-ratio:4/3;border-radius:16px;background:linear-gradient(180deg,rgba(0,0,0,0) 55%,rgba(0,0,0,.35)),linear-gradient(170deg,#9cc6d9 0%,#d8e9ee 42%,#7a8f86 43%,#4f6a5e 70%,#2f463d 100%);position:relative;overflow:hidden}
.seal .photo::before{content:"";position:absolute;left:8%;right:8%;bottom:30%;height:45%;background:linear-gradient(135deg,transparent 49.5%,#e9f1f2 50%) left/50% 100% no-repeat,linear-gradient(225deg,transparent 49.5%,#dfe9ea 50%) right/50% 100% no-repeat;opacity:.95}
.seal .stamp{position:absolute;right:14px;top:14px;background:var(--mint);color:var(--teal);font-weight:700;font-size:13px;padding:6px 12px;border-radius:999px;display:flex;align-items:center;gap:6px}
.seal .rows{margin-top:16px;display:grid;gap:10px;font-size:13px}
.seal .row{display:flex;justify-content:space-between;gap:12px;background:rgba(255,255,255,.06);border-radius:12px;padding:10px 12px}
.seal .row span:first-child{color:#9fbfb3}
.seal .row code{font-family:var(--mono);color:#e6f4ec;background:none;padding:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:60%}
section{padding:84px 0}
section.alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.kicker{font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);margin:0 0 10px}
h2{font-size:clamp(28px,3.6vw,40px);line-height:1.12;letter-spacing:-.02em;margin:0 0 16px}
.intro{color:var(--ink-soft);max-width:40em;margin:0 0 40px;font-size:18px}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;counter-reset:s}
.step{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px}
section.alt .step{background:var(--bg)}
.step::before{counter-increment:s;content:counter(s);display:grid;place-items:center;width:38px;height:38px;border-radius:12px;background:var(--teal);color:var(--mint);font-weight:700;margin-bottom:16px}
.step h3{margin:0 0 8px;font-size:20px}
.step p{margin:0;color:var(--ink-soft)}
@media (max-width:820px){.steps{grid-template-columns:1fr}}
.split{display:grid;grid-template-columns:1fr 1fr;gap:20px}
@media (max-width:820px){.split{grid-template-columns:1fr}}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:28px}
.card h3{margin:0 0 14px;font-size:20px;display:flex;align-items:center;gap:10px}
.card ul{margin:0;padding-left:0;list-style:none}
.card li{padding:8px 0 8px 30px;position:relative;color:var(--ink-soft);border-top:1px solid var(--line)}
.card li:first-child{border-top:0}
.card.yes li::before{content:"";position:absolute;left:2px;top:14px;width:16px;height:16px;border-radius:50%;background:var(--accent);mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M3 8.5l3 3 7-7' stroke='black' stroke-width='2.2' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/contain no-repeat;-webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M3 8.5l3 3 7-7' stroke='black' stroke-width='2.2' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/contain no-repeat}
.card.no li::before{content:"";position:absolute;left:5px;top:19px;width:12px;height:2px;background:var(--muted)}
.flow{display:grid;grid-template-columns:1fr auto 1fr auto 1fr;gap:14px;align-items:stretch;margin-top:8px}
.flow .box{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:20px}
.flow .box b{display:block;margin-bottom:6px}
.flow .box small{color:var(--ink-soft);font-size:15px;line-height:1.5;display:block}
.flow .arrow{align-self:center;color:var(--muted);font-size:22px}
.flow .box.chain{background:var(--teal);color:#fff;border-color:var(--teal)}
.flow .box.chain small{color:#cfe3da}
@media (max-width:820px){.flow{grid-template-columns:1fr}.flow .arrow{transform:rotate(90deg);justify-self:center}}
.uses{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.use{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:20px}
section.alt .use{background:var(--bg)}
.use b{display:block;margin-bottom:4px}
.use span{color:var(--ink-soft);font-size:15px}
@media (max-width:900px){.uses{grid-template-columns:repeat(2,1fr)}}
@media (max-width:520px){.uses{grid-template-columns:1fr}}
.privacy-band{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.privacy-band div{background:var(--mint-soft);border-radius:16px;padding:20px}
.privacy-band b{display:block;margin-bottom:4px}
.privacy-band span{color:var(--ink-soft);font-size:15px}
@media (max-width:820px){.privacy-band{grid-template-columns:1fr}}
.cta{background:linear-gradient(160deg,#123739,#0c2526);color:#fff;border-radius:28px;padding:48px;display:grid;grid-template-columns:1fr auto;gap:28px;align-items:center}
.cta h2{color:#fff}
.cta p{color:#cfe3da;margin:0}
.cta .ctas{display:flex;flex-wrap:wrap;gap:12px}
@media (max-width:820px){.cta{grid-template-columns:1fr;padding:32px 24px}}
.slogan{font-family:var(--mono);color:var(--mint);font-size:14px;letter-spacing:.02em}
footer{padding:44px 0 56px;color:var(--muted);font-size:15px;border-top:1px solid var(--line)}
footer .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:16px}
footer nav{display:flex;flex-wrap:wrap;gap:18px}
footer a{color:var(--ink-soft)}
.legal{padding:56px 0 80px}
.legal .wrap{max-width:820px}
.legal h1{font-size:clamp(32px,4.4vw,46px);letter-spacing:-.02em;line-height:1.1;margin:0 0 10px}
.legal .stand{color:var(--muted);margin:0 0 32px}
.legal h2{font-size:24px;margin:44px 0 12px;padding-top:8px}
.legal h3{font-size:18px;margin:28px 0 8px}
.legal p,.legal li{color:var(--ink-soft)}
.legal ul{padding-left:22px}
.legal li{margin:6px 0}
.legal address{font-style:normal;color:var(--ink-soft)}
.legal .summary{background:var(--mint-soft);border-radius:var(--radius);padding:22px 26px;margin:0 0 8px}
.legal .summary p{margin:0 0 8px;color:var(--ink)}
.legal .summary ul{margin:0}
.legal .summary li{color:var(--ink)}
.legal .hint{background:var(--warn-bg);border:1px solid var(--warn-line);border-radius:14px;padding:16px 20px;color:var(--ink)}
.legal table{width:100%;border-collapse:collapse;font-size:15px;margin:12px 0}
.legal th,.legal td{text-align:left;vertical-align:top;padding:10px 12px;border-bottom:1px solid var(--line)}
.legal th{color:var(--ink);font-weight:600;background:var(--surface)}
.legal td{color:var(--ink-soft)}
.tablewrap{overflow-x:auto;border:1px solid var(--line);border-radius:14px}
.tablewrap table{margin:0}
.toc{columns:2;gap:24px;padding-left:20px}
@media (max-width:620px){.toc{columns:1}}
code{font-family:var(--mono);font-size:.92em;background:var(--mint-soft);padding:1px 6px;border-radius:6px}