:root{--ink:#161c28;--muted:#5b6678;--line:#e6eaf1;--accent:#2f6df0;--accent2:#6a4df0;--bg:#ffffff;--soft:#f4f7fc}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Hiragino Sans","Noto Sans JP","PingFang SC",sans-serif;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;display:block}
.wrap{max-width:1060px;margin:0 auto;padding:0 24px}
.prose{max-width:740px;margin:0 auto;padding:8px 24px 8px}

/* header */
header.site{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.82);backdrop-filter:saturate(160%) blur(12px);border-bottom:1px solid var(--line)}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;gap:14px;height:60px}
.brand{font-weight:700;font-size:18px;color:var(--ink);white-space:nowrap}
.brand span{color:var(--muted);font-weight:500}
header.site nav{display:flex;align-items:center;gap:20px;flex-wrap:wrap}
header.site nav a{color:var(--muted);font-weight:500;font-size:15px}
header.site nav a:hover{color:var(--ink);text-decoration:none}
.langsw{display:flex;gap:8px;border-left:1px solid var(--line);padding-left:16px}
.langsw a{font-size:13.5px}
.langsw a.on{color:var(--ink);font-weight:700}

/* hero */
.hero{background:linear-gradient(180deg,#eef2fb 0%,#f7f9fe 62%,#fff 100%);border-bottom:1px solid var(--line);padding:64px 0 0;text-align:center;overflow:hidden}
.hero h1{font-size:46px;line-height:1.1;letter-spacing:-.02em;margin:.1em auto .25em;max-width:14ch}
.hero .lead{font-size:20px;color:var(--muted);max-width:60ch;margin:0 auto 22px}
.hero .how{font-size:15px;color:var(--muted);margin:0 0 18px}
.hero .how b{color:var(--ink)}
.kbd{display:inline-block;background:#fff;border:1px solid var(--line);border-bottom-width:2px;border-radius:6px;padding:1px 7px;font:600 13px/1.4 ui-monospace,SFMono-Regular,Menlo,monospace;color:var(--ink)}
.badge{display:inline-block;background:var(--ink);color:#fff;border-radius:999px;padding:11px 20px;font-weight:600;font-size:15px}
.badge.soft{background:#fff;color:var(--ink);border:1px solid var(--line)}
.meta{color:var(--muted);font-size:13.5px;margin:12px 0 0}
.heroshot{margin:40px auto -60px;max-width:760px;border-radius:16px;box-shadow:0 30px 70px -28px rgba(22,38,80,.45);border:1px solid var(--line)}

/* bands + features */
.band{padding:96px 0}
.band.soft{background:var(--soft)}
.band.tight{padding:64px 0}
.feature{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.feature + .feature{margin-top:96px}
.feature .shot{border-radius:14px;box-shadow:0 24px 56px -26px rgba(22,38,80,.4);border:1px solid var(--line)}
.feature.rev .txt{order:2}
.eyebrow{font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);margin:0 0 10px}
.feature h2{font-size:30px;line-height:1.18;letter-spacing:-.01em;margin:0 0 14px}
.feature p{font-size:17px;color:var(--muted);margin:0}
.sec-head{text-align:center;max-width:40ch;margin:0 auto 14px}
.sec-head h2{font-size:34px;letter-spacing:-.015em;margin:0 0 10px}
.sec-head p{color:var(--muted);font-size:18px;margin:0}

/* small feature grid */
.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:40px}
.card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px 22px}
.band.soft .card{background:#fff}
.card h3{margin:0 0 6px;font-size:17px}
.card p{margin:0;color:var(--muted);font-size:15px}

/* pricing */
.price-wrap{display:grid;grid-template-columns:1fr 1fr 1fr;gap:16px;margin-top:36px;align-items:stretch}
.plan{background:#fff;border:1px solid var(--line);border-radius:16px;padding:26px 24px;display:flex;flex-direction:column}
.plan.best{border-color:var(--accent);box-shadow:0 0 0 3px rgba(47,109,240,.12)}
.plan .tag{align-self:flex-start;background:var(--accent);color:#fff;font-size:12px;font-weight:700;border-radius:999px;padding:3px 10px;margin-bottom:10px}
.plan h3{margin:0;font-size:18px}
.plan .amt{font-size:34px;font-weight:700;letter-spacing:-.02em;margin:8px 0 2px}
.plan .per{color:var(--muted);font-size:14px}
.freebox{background:#fff;border:1px dashed var(--line);border-radius:16px;padding:22px 24px;margin-top:16px}
.freebox b{color:var(--ink)}
.pricenote{color:var(--muted);font-size:13.5px;text-align:center;margin:18px auto 0;max-width:60ch}

/* cta */
.cta{text-align:center}
.cta h2{font-size:34px;letter-spacing:-.015em;margin:0 0 18px}

/* prose (legal/support) */
.prose h1{font-size:32px;line-height:1.2;margin:.2em 0 .15em}
.prose h2{font-size:21px;margin:1.7em 0 .4em}
.prose h3{font-size:17px;margin:1.3em 0 .3em}
.prose .updated{color:var(--muted);font-size:14px;margin-top:0}
.tldr{background:var(--soft);border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:10px;padding:14px 18px;margin:18px 0}
.note{color:var(--muted);font-size:13.5px;font-style:italic;margin:6px 0 18px}
.prose ul{padding-left:1.2em}.prose li{margin:.25em 0}
code{background:var(--soft);border:1px solid var(--line);border-radius:5px;padding:.05em .4em;font:13.5px ui-monospace,SFMono-Regular,Menlo,monospace}

/* footer */
footer.site{border-top:1px solid var(--line);margin-top:0;background:var(--soft);color:var(--muted);font-size:14px;padding:40px 0}
footer.site .cols{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;align-items:flex-start}
footer.site nav{display:flex;gap:18px;flex-wrap:wrap}
footer.site nav a{color:var(--muted)}
footer.site .fine{font-size:12.5px;line-height:1.6;max-width:70ch;margin:18px 0 0}
footer.site .langsw{border:0;padding:0}

@media(max-width:760px){
 .hero h1{font-size:34px}.hero .lead{font-size:18px}
 .feature{grid-template-columns:1fr;gap:24px}.feature.rev .txt{order:0}
 .feature + .feature{margin-top:56px}
 .feature h2,.sec-head h2,.cta h2{font-size:26px}
 .grid,.price-wrap{grid-template-columns:1fr}
 .band{padding:64px 0}.heroshot{margin-bottom:-36px}
 header.site .wrap{height:auto;min-height:60px;padding:10px 24px;flex-wrap:wrap}
 header.site nav{gap:12px}
}
/* CJK: negative letter-spacing collides strokes — reset for ja/zh */
:lang(ja) .hero h1,:lang(zh-Hans) .hero h1,
:lang(ja) .feature h2,:lang(zh-Hans) .feature h2,
:lang(ja) .sec-head h2,:lang(zh-Hans) .sec-head h2,
:lang(ja) .cta h2,:lang(zh-Hans) .cta h2,
:lang(ja) .plan .amt,:lang(zh-Hans) .plan .amt{letter-spacing:normal}
a:focus-visible{outline:3px solid rgba(47,109,240,.45);outline-offset:3px;border-radius:4px}
a.badge:hover{text-decoration:none;opacity:.92}