:root{--b1:#4f7cff;--b2:#16d1d8;--b3:#8b5cf6;--bg:#f6f8fc;--bg2:#fff;--alt:#eef2fa;--tx:#0e1730;--tx2:#4a5878;--tx3:#7a869f;--bd:#dfe5f1;--card:#fff;--sh:0 1px 2px rgba(16,30,70,.05),0 8px 24px -12px rgba(16,30,70,.18);--code:#eaf0ff;--r:16px;color-scheme:light}
@media(prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#080d1c;--bg2:#0d1429;--alt:#0b1122;--tx:#eaf0ff;--tx2:#a9b6d3;--tx3:#7584a6;--bd:#1c2845;--card:#111a33;--sh:0 1px 0 rgba(255,255,255,.03) inset,0 10px 30px -14px #000;--code:#17244a;color-scheme:dark}}
:root[data-theme=dark]{--bg:#080d1c;--bg2:#0d1429;--alt:#0b1122;--tx:#eaf0ff;--tx2:#a9b6d3;--tx3:#7584a6;--bd:#1c2845;--card:#111a33;--sh:0 1px 0 rgba(255,255,255,.03) inset,0 10px 30px -14px #000;--code:#17244a;color-scheme:dark}
*{box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--tx);font:16px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Roboto,sans-serif;-webkit-font-smoothing:antialiased;padding-bottom:76px}
a{color:var(--b1);text-decoration:none}a:hover{text-decoration:underline}
img,svg{max-width:100%}h1,h2,h3{line-height:1.25;margin:0 0 .5em;letter-spacing:-.01em}
h1{font-size:clamp(28px,6vw,52px);font-weight:800}h2{font-size:clamp(23px,4vw,34px);font-weight:750}h3{font-size:18px;font-weight:700}
p{margin:0 0 1em}code{font:.88em ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;background:var(--code);padding:.12em .45em;border-radius:7px;color:var(--b1)}
.wrap{max-width:1160px;margin:0 auto;padding:0 20px}.narrow{max-width:820px}.center{text-align:center}
.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;background:#fff;padding:8px;z-index:99}
.hdr{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:saturate(1.6) blur(14px);border-bottom:1px solid var(--bd)}
.hdr-in{display:flex;align-items:center;gap:20px;height:64px}
.brand{white-space:nowrap;display:flex;align-items:center;gap:10px;color:var(--tx);font-weight:800;font-size:19px}.brand:hover{text-decoration:none}.brand small{display:block;font-size:10px;letter-spacing:.14em;color:var(--tx3);font-weight:600;margin-top:-4px;text-transform:uppercase}
.nav{display:none;gap:4px;margin-left:12px}.nav a{color:var(--tx2);padding:8px 13px;border-radius:10px;font-weight:600;font-size:15px}.nav a:hover,.nav a[aria-current]{background:var(--alt);color:var(--tx);text-decoration:none}
.hdr-r{margin-left:auto;display:flex;align-items:center;gap:8px}
.lang{font-size:13px;color:var(--tx3);padding:0 6px}.lang i{margin:0 3px;opacity:.5;font-style:normal}.lang s{text-decoration:none;opacity:.6}
.iconbtn{background:none;border:1px solid var(--bd);width:40px;height:40px;border-radius:12px;display:grid;place-items:center;color:var(--tx2);cursor:pointer;list-style:none}.iconbtn::-webkit-details-marker{display:none}
.t-moon{display:none}[data-theme=dark] .t-sun{display:none}[data-theme=dark] .t-moon{display:block}
@media(prefers-color-scheme:dark){:root:not([data-theme=light]) .t-sun{display:none}:root:not([data-theme=light]) .t-moon{display:block}}
.mm{position:relative}.mm-p{position:absolute;right:0;top:48px;width:230px;background:var(--bg2);border:1px solid var(--bd);border-radius:16px;padding:10px;box-shadow:var(--sh);display:flex;flex-direction:column;gap:2px}
.mm-p a{padding:11px 12px;border-radius:10px;color:var(--tx);font-weight:600}.mm-p a:hover{background:var(--alt);text-decoration:none}.mm-p .btn{margin-top:6px;color:#fff}
.btn.hide-s{display:none}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 20px;border-radius:13px;font-weight:700;font-size:15px;border:1px solid transparent;cursor:pointer;transition:.18s;line-height:1.2}.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-p{background:linear-gradient(135deg,var(--b1),#3f6cf0 55%,var(--b3));color:#fff;box-shadow:0 8px 22px -8px rgba(79,124,255,.7)}.btn-p:hover{box-shadow:0 12px 26px -8px rgba(79,124,255,.85)}
.btn-g{background:var(--card);color:var(--tx);border-color:var(--bd)}.btn-g:hover{border-color:var(--b1);color:var(--b1)}
.btn-sm{padding:8px 14px;font-size:14px;border-radius:11px}.btn-lg{padding:14px 24px;font-size:16px;border-radius:15px}.row{display:flex;flex-wrap:wrap;gap:12px}
.dock{position:fixed;left:0;right:0;bottom:0;z-index:40;display:flex;gap:10px;padding:10px 14px calc(10px + env(safe-area-inset-bottom));background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(14px);border-top:1px solid var(--bd)}.dock .btn{flex:1}
.hero{position:relative;overflow:hidden;padding:44px 0 36px}
.hero:before{content:"";position:absolute;inset:-20% -10% auto auto;width:640px;height:640px;background:radial-gradient(closest-side,rgba(79,124,255,.28),transparent);filter:blur(10px);z-index:-1}
.hero:after{content:"";position:absolute;inset:auto auto -30% -15%;width:560px;height:560px;background:radial-gradient(closest-side,rgba(22,209,216,.2),transparent);z-index:-1}
.hero-in{display:grid;gap:28px}.hero h1 em{font-style:normal;background:linear-gradient(120deg,var(--b1),var(--b2));-webkit-background-clip:text;background-clip:text;color:transparent}
.pill{display:inline-flex;align-items:center;gap:6px;padding:6px 13px;border-radius:99px;background:var(--card);border:1px solid var(--bd);font-size:13px;font-weight:600;color:var(--tx2);margin-bottom:16px}.pill .ic{color:var(--b1)}
.lead{font-size:clamp(16px,2.4vw,19px);color:var(--tx2);max-width:640px}
.trust{list-style:none;display:flex;gap:26px;padding:0;margin:30px 0 0}.trust b{display:block;font-size:28px;font-weight:800;line-height:1.1;background:linear-gradient(120deg,var(--b1),var(--b2));-webkit-background-clip:text;background-clip:text;color:transparent}.trust span{font-size:13px;color:var(--tx3)}
.hero-v{display:flex;justify-content:center}.hero-art{width:min(380px,92%);height:auto;color:var(--b1)}
.hero-art .ring{fill:none;stroke:var(--bd);stroke-dasharray:3 6}.hero-art .ln{stroke:var(--bd)}.hero-art .nd{fill:var(--card);stroke:var(--bd)}.hero-art .lb{fill:var(--tx3);font:600 13px ui-monospace,monospace}
.sec{padding:52px 0}.sec.alt{background:var(--alt);border-block:1px solid var(--bd)}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.1em;color:var(--b1);text-transform:uppercase;margin-bottom:10px}
.sub{color:var(--tx2);max-width:680px;font-size:17px}
.grid{display:grid;gap:14px;grid-template-columns:repeat(2,1fr)}.g3,.g4,.g2{grid-template-columns:1fr}
.card{display:block;background:var(--card);border:1px solid var(--bd);border-radius:var(--r);padding:20px;color:var(--tx);box-shadow:var(--sh);transition:.2s;position:relative}
a.card:hover{text-decoration:none;border-color:color-mix(in srgb,var(--b1) 55%,var(--bd));transform:translateY(-3px)}
.card h3{margin:12px 0 2px}.card p{color:var(--tx2);font-size:14.5px;margin:6px 0 0;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.handle{font:600 13px ui-monospace,monospace;color:var(--tx3)}
.ico{display:inline-grid;place-items:center;width:46px;height:46px;border-radius:14px;background:linear-gradient(135deg,color-mix(in srgb,var(--b1) 16%,transparent),color-mix(in srgb,var(--b2) 18%,transparent));color:var(--b1);border:1px solid color-mix(in srgb,var(--b1) 22%,transparent)}.ico.lg{width:54px;height:54px;border-radius:16px;flex:none}.ico.xl{width:76px;height:76px;border-radius:22px;flex:none}
.tag{display:inline-block;font-size:12px;font-weight:700;color:var(--b1);background:color-mix(in srgb,var(--b1) 11%,transparent);padding:3px 10px;border-radius:99px}
.grp{margin-top:34px}.grp-h{display:flex;gap:14px;align-items:center;margin-bottom:16px}.grp-h h2,.grp-h h3{margin:0}.grp-h h2 small{display:block;font-size:14px;font-weight:600;color:var(--b1);margin-top:2px}.grp-h p{margin:2px 0 0;color:var(--tx2);font-size:14.5px}
.between{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:10px}.more{font-weight:700;display:flex;gap:4px;align-items:center}
.split{display:grid;gap:28px;align-items:center}
.steps{list-style:none;counter-reset:s;padding:0;margin:22px 0}.steps li{counter-increment:s;padding:0 0 16px 52px;position:relative}.steps li:before{content:counter(s);position:absolute;left:0;top:0;width:36px;height:36px;border-radius:12px;background:linear-gradient(135deg,var(--b1),var(--b3));color:#fff;display:grid;place-items:center;font-weight:800}.steps b{display:block}.steps span{color:var(--tx2);font-size:15px}
.panel{background:linear-gradient(145deg,color-mix(in srgb,var(--b1) 14%,var(--card)),color-mix(in srgb,var(--b2) 10%,var(--card)));border:1px solid var(--bd);border-radius:24px;padding:22px}
.chat{display:flex;flex-direction:column;gap:10px}.msg{max-width:82%;padding:10px 15px;border-radius:16px;font-size:15px}.msg.me{align-self:flex-end;background:var(--b1);color:#fff;border-bottom-right-radius:5px;font-family:ui-monospace,monospace}.msg.bot{background:var(--card);border:1px solid var(--bd);border-bottom-left-radius:5px}.msg.ok{display:flex;gap:8px;align-items:center;color:#0a9d6e;font-weight:600}
.mem{background:linear-gradient(135deg,#17224a,#1f2f7a 60%,#3b2a86);color:#eef2ff;border-radius:26px;padding:34px 26px;position:relative;overflow:hidden}.mem:after{content:"";position:absolute;right:-60px;top:-60px;width:260px;height:260px;border-radius:50%;background:radial-gradient(closest-side,rgba(22,209,216,.45),transparent)}
.mem .eyebrow{color:#7fe3ff}.mem .sub{color:#c9d5f5}.mem .btn-g{background:rgba(255,255,255,.1);color:#fff;border-color:rgba(255,255,255,.25)}.mem>*{position:relative;z-index:1}
.cta{padding:10px 0 60px}.cta-in{display:grid;gap:18px;background:var(--card);border:1px solid var(--bd);border-radius:24px;padding:28px;box-shadow:var(--sh);margin:0 20px}@media(min-width:1200px){.cta-in{margin:0 auto}}.cta h2{margin:0 0 6px;font-size:26px}.cta p{margin:0;color:var(--tx2)}
.phead{padding:30px 0 22px;background:linear-gradient(180deg,color-mix(in srgb,var(--b1) 8%,transparent),transparent)}.phead h1{font-size:clamp(26px,5vw,42px)}.phead h1 small{display:block;font:600 15px ui-monospace,monospace;color:var(--tx3);margin-top:6px}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:4px;padding:0;margin:0 0 14px;font-size:13.5px;color:var(--tx3)}.crumbs li+li:before{content:"/";margin-right:4px;opacity:.5}.crumbs a{color:var(--tx3)}
.bot-h{display:flex;gap:18px;align-items:flex-start}
.two{display:grid;gap:26px;padding-top:20px;padding-bottom:44px}.toc{order:-1;background:var(--card);border:1px solid var(--bd);border-radius:14px;padding:14px 16px;font-size:14px;align-self:start}.toc b{display:block;margin-bottom:6px}.toc a{display:block;color:var(--tx2);padding:3px 0}
.prose{min-width:0;font-size:16.5px}.prose h2{font-size:23px;margin:1.8em 0 .6em;padding-top:.2em;scroll-margin-top:84px}.prose h3{margin:1.4em 0 .4em}.prose ul{padding-left:1.2em;margin:.4em 0 1.1em}.prose li{margin:.35em 0}.prose li>p{margin:0}.prose blockquote{margin:1.2em 0;padding:14px 18px;border-radius:14px;background:color-mix(in srgb,var(--b1) 8%,var(--card));border:1px solid color-mix(in srgb,var(--b1) 26%,var(--bd));border-left:4px solid var(--b1);color:var(--tx)}.prose blockquote p{margin:0}
.note{margin:2em 0 1em;padding:16px 18px;border-radius:14px;background:var(--alt);border:1px dashed var(--bd);font-size:15px}.src{font-size:13.5px;color:var(--tx3)}
.video{margin:0 0 26px;border-radius:18px;overflow:hidden;aspect-ratio:16/9;background:#0c1330;border:1px solid var(--bd)}.video iframe{width:100%;height:100%;border:0}
.video.ph{display:grid;place-items:center;background:radial-gradient(circle at 30% 20%,#27408f,#0c1330 70%);color:#dbe6ff;text-align:center}.video.ph div{display:flex;flex-direction:column;align-items:center;gap:6px;padding:20px}.video.ph b{font-size:18px}.video.ph span{font-size:13px;color:#9fb2e6}
.pn{display:flex;justify-content:space-between;gap:12px;margin-top:30px}.pn a{padding:10px 14px;border:1px solid var(--bd);border-radius:12px;background:var(--card);font-weight:600;font-size:14.5px}
.cats .cnt{display:block;margin-top:10px;font-size:13px;color:var(--tx3)}
.toc-list{list-style:none;padding:0;margin:14px 0 0;display:grid;gap:10px}.toc-list li{display:flex;align-items:center;gap:12px;background:var(--card);border:1px solid var(--bd);border-radius:14px;padding:14px 16px}.toc-list li:before{content:counter(list-item,decimal-leading-zero);font:700 14px ui-monospace,monospace;color:var(--b1);width:26px;flex:none}.toc-list a{flex:1;color:var(--tx);min-width:0}.toc-list a:hover{text-decoration:none;color:var(--b1)}.toc-list b{display:block}.toc-list a span{display:none;color:var(--tx3);font-size:13.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.toc-list i{display:none;font-style:normal}
.price{font-size:30px;font-weight:800;margin:8px 0}.plan p{-webkit-line-clamp:5}.tick{list-style:none;padding:0;margin:10px 0}.tick li{padding:5px 0 5px 24px;position:relative}.tick li:before{content:"";position:absolute;left:2px;top:13px;width:10px;height:6px;border-left:2px solid var(--b2);border-bottom:2px solid var(--b2);transform:rotate(-45deg)}
.mem.big{padding:40px 28px}.qa{background:var(--card);border:1px solid var(--bd);border-radius:14px;padding:4px 18px;margin-bottom:10px}.qa summary{cursor:pointer;padding:14px 0;font-weight:700;list-style:none;display:flex;justify-content:space-between;gap:10px}.qa summary:after{content:"+";color:var(--b1);font-size:22px;line-height:1}.qa[open] summary:after{content:"−"}.qa p{color:var(--tx2)}
.log{display:grid;gap:6px;padding:20px 0;border-bottom:1px solid var(--bd)}.log time{font:700 14px ui-monospace,monospace;color:var(--b1)}.log h3{margin:0 0 6px}.log h2{font-size:17px;margin:1em 0 .3em}.log .prose{font-size:15px}
.ftr{border-top:1px solid var(--bd);background:var(--bg2);padding:40px 0 22px;margin-top:20px}.ftr-g{display:grid;gap:26px;grid-template-columns:1fr 1fr}.ftr-g>div:first-child{grid-column:1/-1}.ftr h3{font-size:13px;color:var(--tx3);text-transform:uppercase;letter-spacing:.1em;margin-bottom:8px}.ftr a{display:block;color:var(--tx2);padding:4px 0;font-size:14.5px}.ftr p{color:var(--tx3);font-size:14px;max-width:320px}.copy{margin-top:28px!important;max-width:none!important;font-size:13px!important}.copy a{display:inline}
@media(min-width:720px){.grid{grid-template-columns:repeat(3,1fr)}.g2{grid-template-columns:1fr 1fr}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(2,1fr)}.cta-in{grid-template-columns:1fr auto;align-items:center;padding:34px}.ftr-g{grid-template-columns:1.4fr 1fr 1fr 1fr}.ftr-g>div:first-child{grid-column:auto}.toc-list a span{display:block}.toc-list i{display:inline-block}}
@media(min-width:960px){.nav{display:flex}.mm{display:none}.btn.hide-s{display:inline-flex}.hero{padding:76px 0 60px}.hero-in{grid-template-columns:1.15fr .85fr;align-items:center}.grid{grid-template-columns:repeat(4,1fr)}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}.split{grid-template-columns:1.1fr .9fr}.two{grid-template-columns:minmax(0,1fr) 260px;gap:44px}.toc{order:0;position:sticky;top:84px}.dock{display:none}body{padding-bottom:0}.sec{padding:76px 0}.mem{padding:50px}.mem.big{padding:56px}.log{grid-template-columns:130px 1fr}}
@media(max-width:420px){.grid{grid-template-columns:1fr}.trust{gap:18px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
@media(max-width:600px){.bot-h{flex-direction:column;gap:12px}.ico.xl{width:60px;height:60px;border-radius:18px}}