:root{--bg:#0f1716;--bg2:#14211f;--card:#182926;--line:#2c4540;--ink:#eef7f3;--muted:#a9c0b9;--accent:#c6f27a;--accent-ink:#10201c;--gold:#ffe28a;--warn:#ffcf7a;--link:#b9ef6a;--radius:16px;--wrap:1120px}
[hidden]{display:none!important}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:80px}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.65 "Segoe UI",-apple-system,BlinkMacSystemFont,Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif}
a{color:var(--link);text-underline-offset:.18em}
a:hover{color:#dcffa3}
:focus-visible{outline:3px solid var(--gold);outline-offset:2px;border-radius:4px}
img,svg{max-width:100%;height:auto}
h1,h2,h3{line-height:1.2;letter-spacing:-.01em;overflow-wrap:break-word}
:lang(ja){font-family:"Segoe UI","Hiragino Sans","Yu Gothic UI",Meiryo,sans-serif}
:lang(ko){font-family:"Segoe UI","Apple SD Gothic Neo","Malgun Gothic",sans-serif}
:lang(ko){word-break:keep-all;overflow-wrap:anywhere}
:lang(zh-Hant){font-family:"Segoe UI","PingFang TC","Microsoft JhengHei",sans-serif}
:lang(zh-Hans){font-family:"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}
h1{font-size:clamp(2rem,4.6vw,3.3rem);margin:.3em 0 .4em}
h2{font-size:clamp(1.45rem,2.6vw,1.95rem);margin:1.8em 0 .6em}
h3{font-size:1.15rem;margin:1.4em 0 .4em}
code{font:.92em ui-monospace,SFMono-Regular,Consolas,monospace;background:#0b1211;border:1px solid var(--line);border-radius:6px;padding:.08em .35em}
pre{overflow-x:auto;background:#0b1211;border:1px solid var(--line);border-radius:10px;padding:14px}
pre code{border:0;padding:0;background:none}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px;top:8px;background:var(--accent);color:var(--accent-ink);padding:8px 14px;border-radius:8px;z-index:10}
.skip:focus{left:8px}
.muted{color:var(--muted)}
.small{font-size:.88rem}
/* header */
.site-header{position:sticky;top:0;z-index:5;background:rgba(15,23,22,.94);border-bottom:1px solid var(--line)}
.header-row{display:flex;align-items:center;gap:18px;min-height:64px;flex-wrap:wrap}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font-weight:800;font-size:1.12rem}
.site-header nav{flex:1;min-width:0}
.nav{display:flex;gap:4px;list-style:none;margin:0;padding:0;overflow-x:auto;scrollbar-width:none}
.nav a{display:block;padding:8px 11px;border-radius:10px;color:var(--ink);text-decoration:none;white-space:nowrap;font-size:.96rem}
.nav a:hover,.nav a[aria-current]{background:var(--card)}
@media (max-width:760px){.header-row{gap:6px 12px;padding-top:8px}.site-header nav{order:3;flex-basis:100%;margin:0 -8px 4px}.btn-small{margin-left:auto}.nav{gap:0}.nav a{padding:8px 8px;font-size:.93rem}}
/* language switcher */
.lang-switch{position:relative;flex:none}
.lang-switch summary{display:flex;align-items:center;gap:5px;min-height:40px;padding:6px 10px;border:1px solid var(--line);border-radius:10px;cursor:pointer;list-style:none;font-size:.9rem;white-space:nowrap}
.lang-switch summary::-webkit-details-marker{display:none}
.lang-switch ul{position:absolute;right:0;top:calc(100% + 6px);min-width:150px;margin:0;padding:6px;list-style:none;background:var(--card);border:1px solid var(--line);border-radius:12px;z-index:6}
.lang-switch a{display:block;padding:7px 10px;border-radius:8px;color:var(--ink);text-decoration:none}
.lang-switch a:hover,.lang-switch a[aria-current]{background:var(--bg2)}
@media (max-width:760px){.lang-switch{margin-left:auto}.lang-switch+.btn-small{margin-left:0}}
@media (max-width:430px){.header-row{gap:6px 8px}.brand{font-size:1rem;gap:7px}.lang-switch summary{padding:6px 8px;gap:4px}.btn-small{padding:6px 12px;font-size:.88rem}.nav a{padding:8px 6px;font-size:.9rem}}
/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:10px 20px;border-radius:999px;background:var(--accent);color:var(--accent-ink);font-weight:750;text-decoration:none;border:2px solid var(--accent);font-size:1rem;cursor:pointer;font-family:inherit}
.btn:hover{background:#dcffa3;color:var(--accent-ink)}
.btn[disabled]{opacity:.55;cursor:not-allowed}
.btn-ghost{background:transparent;color:var(--ink);border-color:#4d7168}
.btn-ghost:hover{background:var(--card);color:var(--ink)}
.btn-small{min-height:40px;padding:6px 16px;font-size:.94rem}
.btn-large{min-height:52px;padding:12px 26px;font-size:1.06rem}
.btn-paypal{background:#ffc439;border-color:#ffc439;color:#111}
.btn-paypal:hover{background:#ffd56b}
/* hero */
.hero{background:radial-gradient(900px 420px at 80% 0,#1f3a33 0,transparent 70%),var(--bg)}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:30px;align-items:center;padding:56px 20px 40px}
.eyebrow{color:var(--accent);font-weight:700;letter-spacing:.04em;text-transform:uppercase;font-size:.82rem;margin:0}
.lead{font-size:1.15rem;color:#d2e4de;max-width:46em}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:24px 0}
.facts{display:flex;flex-wrap:wrap;gap:8px 20px;list-style:none;padding:0;margin:0;color:var(--muted);font-size:.95rem}
.facts li::before,.ticks li::before{content:"✓ ";color:var(--accent);font-weight:800}
.hero-art{width:100%;max-width:520px;display:block;margin:auto}
@media (max-width:860px){.hero-grid{grid-template-columns:1fr;padding-top:32px}.hero-visual{max-width:420px}}
/* sections */
.section{padding:28px 20px}
.section-lead{color:var(--muted);max-width:48em}
.band{background:var(--bg2);border-block:1px solid var(--line)}
.card-grid{list-style:none;padding:0;margin:20px 0;display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.card h3{margin:.5em 0 .3em}
.card p{margin:0;color:#cfe1db}
.ico{color:var(--accent)}
.more::after{content:" →"}
.steps{list-style:none;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;counter-reset:s}
.steps>li{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px;counter-increment:s}
.steps:not(.steps-long)>li::before{content:"0" counter(s);color:var(--accent);font-weight:800}
.steps h3{margin:.3em 0}
.steps-long{grid-template-columns:1fr}
.steps-long h2{margin:0 0 .3em;font-size:1.3rem}
.split{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:start}
@media (max-width:860px){.split{grid-template-columns:1fr}}
/* prose & tables */
.prose{max-width:820px}
.prose li{margin:.3em 0}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;padding:16px 0 0;margin:0;font-size:.9rem;color:var(--muted)}
.crumbs li+li::before{content:"/";margin-right:6px;color:#5d7d75}
.table-wrap{overflow-x:auto;margin:16px 0;border:1px solid var(--line);border-radius:12px}
table{border-collapse:collapse;width:100%;font-size:.96rem}
caption{text-align:left;padding:10px 14px;color:var(--muted);font-size:.9rem;caption-side:top}
th,td{padding:9px 14px;border-top:1px solid var(--line);text-align:left;vertical-align:top}
thead th{background:var(--bg2);border-top:0}
tbody th{font-weight:600}
.formula{font:1rem ui-monospace,Consolas,monospace;background:#0b1211;border:1px solid var(--line);border-radius:10px;padding:12px 14px;overflow-x:auto}
.note{border-radius:12px;padding:4px 18px;margin:18px 0;border:1px solid var(--line);background:var(--card)}
.note-warn{border-color:#6b5426;background:#231d10}
.note-warn strong{color:var(--warn)}
.note-info strong{color:var(--accent)}
.toc{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:10px 18px}
.toc p{margin:.4em 0;font-weight:700}
.article-head .byline{color:var(--muted);font-size:.92rem}
.link-list{padding-left:1.2em}
.guide-list{list-style:none;padding:0;display:grid;gap:12px}
.guide-list a{display:block;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px 20px;text-decoration:none;color:var(--ink)}
.guide-list a:hover{border-color:var(--accent)}
.guide-list span{display:block;color:var(--muted);margin-top:4px;font-size:.95rem}
.faq-item{border-top:1px solid var(--line);padding:4px 0}
.faq-item h2,.faq-item h3{margin:.9em 0 .3em;font-size:1.15rem}
.release h2 time{font-size:.95rem;color:var(--muted);font-weight:400;margin-left:8px}
/* pricing & download */
.price-card,.buy-offer{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.price-card{max-width:440px}
.price{margin:.2em 0}
.price strong{font-size:2.6rem;color:var(--ink)}
.price span{color:var(--muted)}
.ticks{list-style:none;padding:0}
.buy{margin:24px 0}
.buy-offer{display:grid;grid-template-columns:1fr auto;gap:24px;align-items:center}
.buy-offer h2{margin-top:0}
.buy-action{max-width:320px}
@media (max-width:760px){.buy-offer{grid-template-columns:1fr}}
.buy-result{margin-top:16px;background:#13261f;border:1px solid #3d6b4f;border-radius:var(--radius);padding:20px}
.result-title{font-weight:700;font-size:1.1rem}
.code-box{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.code-box code{font-size:1.25rem;padding:8px 12px;letter-spacing:.04em}
.result-meta{display:grid;grid-template-columns:auto 1fr;gap:4px 14px;font-size:.92rem;color:var(--muted)}
.result-meta dd{margin:0;word-break:break-all}
.lookup{display:grid;gap:8px;max-width:440px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.lookup input{min-height:44px;border-radius:10px;border:1px solid #4d7168;background:#0b1211;color:var(--ink);padding:8px 12px;font:inherit}
.lookup .btn{justify-self:start;margin-top:8px}
.download-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:18px;margin:20px 0}
.dl-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.dl-card h2{margin:.2em 0}
.tag{display:inline-block;margin:0;padding:2px 10px;border-radius:999px;background:#24413a;color:var(--accent);font-size:.82rem;font-weight:700}
.tag-beta{background:#3a3220;color:var(--gold)}
.hash{display:block;word-break:break-all;margin-top:8px}
.cta-box{display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between;align-items:center;background:linear-gradient(120deg,#1d3a33,#18302b);border:1px solid #3d6158;border-radius:var(--radius);padding:22px 24px;margin:36px 0}
.cta-title{font-size:1.25rem;font-weight:800;margin:0}
.cta-box .muted{margin:.2em 0 0}
.cta-actions{display:flex;gap:10px;flex-wrap:wrap}
.video-facade{position:relative;display:block;border-radius:var(--radius);overflow:hidden;max-width:820px}
.video-facade .play{position:absolute;inset:0;margin:auto;width:84px;height:84px;border-radius:50%;background:rgba(0,0,0,.65)}
.video-facade .play::after{content:"";position:absolute;left:34px;top:26px;border:16px solid transparent;border-left:26px solid #fff}
.low-risk{background:var(--card);border:1px solid #3d6b4f;border-radius:var(--radius);padding:4px 24px 12px;margin:24px 0;max-width:880px}
.low-risk h2,.low-risk h3{margin-top:.8em}
.risk-list li{margin:.5em 0;padding-left:1.4em;text-indent:-1.4em}
.consent{display:flex;gap:10px;align-items:flex-start;background:#0b1211;border:1px solid #4d7168;border-radius:12px;padding:12px 14px;margin-bottom:14px;font-size:.92rem;line-height:1.5}
.consent input{flex:none;width:22px;height:22px;margin:2px 0 0;accent-color:var(--accent);cursor:pointer}
.consent label{cursor:pointer}
.buy-action{max-width:380px}
/* footer */
.site-footer{margin-top:48px;border-top:1px solid var(--line);background:var(--bg2);padding:36px 0 20px;font-size:.95rem}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:24px}
.footer-grid h2{font-size:1rem;margin:0 0 .6em}
.footer-grid ul{list-style:none;padding:0;margin:0}
.footer-grid li{margin:.35em 0}
.disclaimer{margin-top:24px;border-top:1px solid var(--line);padding-top:16px;color:var(--muted);font-size:.86rem}
@media (max-width:760px){.footer-grid{grid-template-columns:1fr 1fr}}
@media (prefers-reduced-motion:no-preference){.btn,.guide-list a{transition:background-color .15s,border-color .15s}}