:root{--bg:#fbfaf8;--surface:#fff;--ink:#1f2937;--ink-strong:#111827;--muted:#6b7280;--line:#11182714;--brand:#16233f;--brand-deep:#0e1830;--btn:#16233f;--mark:#16233f;--accent:#ff3b30;--radius:18px}@media (prefers-color-scheme:dark){:root{--bg:#0e1830;--surface:#16233f;--ink:#f2f4f8;--ink-strong:#fff;--muted:#9aa6bc;--line:#ffffff1a;--mark:#25385c;--brand-deep:#060c1c;--brand:#0e1830;--btn:#4a6cb0}}*{box-sizing:border-box;margin:0;padding:0}html{-webkit-text-size-adjust:100%;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark}@media (prefers-color-scheme:dark){html{--lightningcss-light: ;--lightningcss-dark:initial}}body{background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,SF Pro SC,PingFang SC,Helvetica Neue,Microsoft YaHei,sans-serif;line-height:1.6}a{color:inherit}.wrap{max-width:980px;margin:0 auto;padding:0 22px}header.site{z-index:10;background:color-mix(in srgb, var(--bg) 82%, transparent);-webkit-backdrop-filter:saturate(140%)blur(14px);backdrop-filter:saturate(140%)blur(14px);border-bottom:1px solid var(--line);position:sticky;top:0}header.site .wrap{justify-content:space-between;align-items:center;height:52px;display:flex}.logo{color:var(--ink-strong);letter-spacing:.01em;align-items:center;gap:9px;font-weight:700;text-decoration:none;display:inline-flex}.logo svg{display:block}nav.top{gap:22px;font-size:14px;display:flex}nav.top a{color:var(--muted);text-decoration:none}nav.top a:hover{color:var(--ink-strong)}.hero{text-align:center;background:linear-gradient(180deg, var(--brand-deep) 0%, var(--brand) 100%);color:#fff;padding:88px 0 72px}.hero h1{letter-spacing:-.015em;color:#fff;font-size:clamp(34px,6.4vw,56px);font-weight:700}.hero .dot{color:var(--accent)}.hero p.sub{color:#ffffffc7;max-width:620px;margin:16px auto 0;font-size:clamp(16px,2.6vw,20px);font-weight:400}.hero .free{letter-spacing:.06em;color:#ffffff9e;margin-top:22px;font-size:13px;display:inline-block}.cta{background:var(--btn);color:#fff;border-radius:980px;margin-top:26px;padding:13px 34px;font-size:17px;font-weight:600;text-decoration:none;display:inline-block}.cta:hover{filter:brightness(1.12)}.cta--soon{color:inherit;cursor:default;opacity:.85;background:0 0;box-shadow:inset 0 0 0 1.5px}.cta--soon:hover{filter:none}.soon-note{color:#ffffff9e;letter-spacing:.02em;margin-top:14px;font-size:13px}.bottom .soon-note{color:var(--muted)}section.features{padding:76px 0 8px}.features h2{color:var(--ink-strong);letter-spacing:-.01em;margin-bottom:34px;font-size:clamp(22px,4vw,30px)}.grid{grid-template-columns:repeat(3,1fr);gap:16px;display:grid}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px 22px 24px}.card .mark{background:var(--mark);border-radius:10px;justify-content:center;align-items:center;width:34px;height:34px;margin-bottom:14px;display:flex}.card .mark svg{display:block}.card h3{color:var(--ink-strong);margin-bottom:6px;font-size:16px;font-weight:600}.card p{color:var(--muted);font-size:14px}.bottom{text-align:center;padding:72px 0 80px}.bottom p{color:var(--muted);margin-bottom:20px;font-size:15px}footer.site{border-top:1px solid var(--line);color:var(--muted);padding:26px 0 34px;font-size:13px}footer.site .wrap{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px 26px;display:flex}footer.site a{color:var(--muted);text-decoration:none}footer.site a:hover{color:var(--ink-strong)}main.doc{padding:52px 0 64px}main.doc .wrap{max-width:680px}main.doc h1{color:var(--ink-strong);letter-spacing:-.01em;margin-bottom:8px;font-size:clamp(26px,5vw,34px)}.updated{color:var(--muted);margin-bottom:34px;font-size:13px}main.doc h2{color:var(--ink-strong);margin:28px 0 8px;font-size:17px;font-weight:600}main.doc p,main.doc li{font-size:15px;line-height:1.75}main.doc ul{margin:8px 0;padding-left:22px}main.doc li{margin:4px 0}.key{background:var(--surface);border:1px solid var(--line);border-radius:14px;margin:22px 0 6px;padding:18px 20px;font-size:15px;line-height:1.75}.key strong{color:var(--ink-strong);font-weight:700}a.link{color:var(--ink-strong)}main.help{flex-direction:column;min-height:calc(100vh - 52px);display:flex}main.help .inner{text-align:center;flex:1;justify-content:center;align-items:center;padding:88px 0;display:flex}main.help .inner .wrap{max-width:620px}main.help h1{color:var(--ink-strong);letter-spacing:-.01em;margin-bottom:12px;font-size:clamp(26px,5vw,34px)}main.help p{color:var(--muted);margin-bottom:28px;font-size:16px}a.mail{color:#fff;background:var(--btn);border-radius:980px;padding:12px 30px;font-size:16px;font-weight:600;text-decoration:none;display:inline-block}a.mail:hover{filter:brightness(1.07)}@media (max-width:760px){.grid{grid-template-columns:1fr 1fr}.hero{padding:64px 0 56px}}@media (max-width:520px){.grid{grid-template-columns:1fr}nav.top{gap:14px}}