:root{--bg:#fff;--bg2:#f5f5f7;--tx:#1d1d1f;--tx2:#6e6e73;--ln:#d2d2d7;--ac:#4f6df5;--ac2:#38bdf8;--cd:#fff;--nv:rgba(255,255,255,.78);color-scheme:light;box-sizing:border-box;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
@media(prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#000;--bg2:#111113;--tx:#f5f5f7;--tx2:#a1a1a6;--ln:#2c2c2e;--cd:#1c1c1e;--nv:rgba(0,0,0,.72);color-scheme:dark}}
:root[data-theme="dark"]{--bg:#000;--bg2:#111113;--tx:#f5f5f7;--tx2:#a1a1a6;--ln:#2c2c2e;--cd:#1c1c1e;--nv:rgba(0,0,0,.72);color-scheme:dark}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:70px}
body{margin:0;background:var(--bg);color:var(--tx);font:17px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI","Google Sans",Roboto,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);background:var(--nv);backdrop-filter:blur(20px);z-index:30}
a{color:inherit;text-decoration:none}img{max-width:100%}.sc{mix-blend-mode:screen}.mu{mix-blend-mode:multiply}
nav{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:var(--nv);backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid var(--ln)}
.nw{max-width:1100px;margin:auto;height:52px;display:flex;align-items:center;gap:14px;padding:0 20px}
.br{display:flex;align-items:center;gap:8px;font-weight:600;letter-spacing:-.01em}.nl{display:flex;gap:22px;font-size:13px;color:var(--tx2);margin-left:auto;overflow-x:auto;white-space:nowrap}.nl a:hover{color:var(--tx)}
.ib{background:none;border:0;color:var(--tx);cursor:pointer;font-size:17px;padding:6px;border-radius:8px}
.btn{display:inline-block;border:0;cursor:pointer;font:inherit;font-size:15px;background:var(--ac);color:#fff;padding:10px 20px;border-radius:980px}
.btn.s{background:none;color:var(--ac);padding:10px 6px}.btn.g{background:var(--bg2);color:var(--tx)}.btn.sm{font-size:13px;padding:6px 14px;white-space:nowrap}.btn.d{background:none;color:#d93025;padding:6px 10px}
.hero{text-align:center;padding:90px 20px 90px;max-width:900px;margin:auto}.hero .lg{margin-bottom:26px}
h1{font-size:clamp(40px,8vw,80px);line-height:1.05;letter-spacing:-.03em;margin:0 0 16px;background:linear-gradient(90deg,#6d4cf0,var(--ac),var(--ac2));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{font-size:clamp(19px,3vw,26px);color:var(--tx2);margin:0 auto 30px;max-width:640px}
section{padding:80px 20px}section.a{background:var(--bg2)}
.in{max-width:1100px;margin:auto}h2{font-size:clamp(30px,5vw,48px);letter-spacing:-.025em;margin:0 0 10px}.sub{color:var(--tx2);margin:0 0 36px;max-width:640px;white-space:pre-line}.big{font-size:21px;max-width:760px}
.gr{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:16px}
.cd{background:var(--cd);border:1px solid var(--ln);border-radius:22px;padding:26px;display:flex;flex-direction:column;gap:6px}a.cd:hover{border-color:var(--ac)}
.cd h3{margin:0;font-size:21px}.cd p{margin:0 0 8px;color:var(--tx2);font-size:15px;flex:1}
.ic{width:46px;height:46px;border-radius:12px;background:linear-gradient(135deg,#6d4cf0,var(--ac2));color:#fff;display:grid;place-items:center;font-weight:700;margin-bottom:10px}
.fm{display:grid;gap:12px;max-width:560px}.fm input,.fm textarea{background:var(--cd);border:1px solid var(--ln);border-radius:14px;padding:13px 16px;font:inherit;font-size:16px;color:var(--tx);outline:0;width:100%}.fm input:focus,.fm textarea:focus{border-color:var(--ac)}
.ov{position:fixed;inset:0;z-index:50;background:rgba(0,0,0,.45);display:grid;place-items:center;padding:16px;overflow:auto}.ov.f{background:var(--bg);padding:0;place-items:stretch}
.ms{background:var(--cd);width:100%;max-width:440px;padding:44px;box-shadow:0 8px 40px rgba(0,0,0,.3);border-radius:6px}.ms .lg{margin-bottom:22px}.ms h3{font-size:24px;font-weight:600;margin:0 0 16px}
.ms input{width:100%;font:inherit;font-size:15px;color:var(--tx);background:transparent;border:0;border-bottom:1px solid var(--tx2);padding:8px 2px;margin:0 0 14px;outline:0}.ms input:focus{border-bottom:2px solid var(--ac)}
.er{color:#d93025;font-size:13px;margin:-6px 0 12px}.em{font-size:14px;color:var(--tx2);margin:-6px 0 14px}.sm2{font-size:13px;color:var(--tx2)}
.sh{display:grid;grid-template-columns:230px 1fr;min-height:100vh;padding-top:env(safe-area-inset-top,0px)}
aside{background:var(--bg2);border-right:1px solid var(--ln);padding:22px 14px;display:flex;flex-direction:column;gap:4px;position:sticky;top:0;height:100vh;align-self:start}
aside .lg{margin:0 8px 4px}.sb{background:none;border:0;text-align:left;font:inherit;font-size:15px;color:var(--tx);padding:10px 12px;border-radius:10px;cursor:pointer}.sb:hover{background:var(--ln)}.sb.on{background:var(--cd);box-shadow:0 1px 3px rgba(0,0,0,.15);font-weight:600}
.sp{flex:1}main{padding:34px clamp(16px,4vw,48px) 80px;max-width:900px;width:100%}main h2{font-size:30px;margin:0 0 4px}
.pc{background:var(--cd);border:1px solid var(--ln);border-radius:16px;padding:16px;margin-bottom:12px}.hd{display:flex;align-items:center;gap:10px;justify-content:space-between;flex-wrap:wrap}
.fl{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:10px;margin-top:12px}
.fl label,.lb{font-size:12px;color:var(--tx2);display:block;margin-bottom:3px}.fl input,.fl textarea,.pc>input,.pc>textarea,.fl select{width:100%;font:inherit;font-size:15px;color:var(--tx);background:var(--bg);border:1px solid var(--ln);border-radius:10px;padding:9px 11px;outline:0}.fl input:focus,.fl textarea:focus{border-color:var(--ac)}
.w2{grid-column:1/-1}.tag{font-size:11px;text-transform:uppercase;letter-spacing:.06em;background:var(--bg2);color:var(--tx2);border-radius:6px;padding:2px 8px}
.ck{font-size:14px;display:flex;gap:6px;align-items:center}.row{display:flex;flex-wrap:wrap;gap:6px 18px;margin-top:10px}
.it{border-top:1px solid var(--ln);margin-top:12px;padding-top:2px}
.fb{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(20px + env(safe-area-inset-bottom,0px));z-index:40;background:var(--tx);color:var(--bg);border-radius:980px;padding:8px 8px 8px 18px;display:flex;gap:10px;align-items:center;font-size:14px;box-shadow:0 8px 30px rgba(0,0,0,.3)}
.tg{position:fixed;left:50%;bottom:calc(80px + env(safe-area-inset-bottom,0px));transform:translateX(-50%);background:var(--tx);color:var(--bg);padding:10px 18px;border-radius:980px;font-size:14px;z-index:90;max-width:90%}
footer{padding:36px 20px;text-align:center;color:var(--tx2);font-size:13px;border-top:1px solid var(--ln)}
.lg{object-fit:contain}.hero .lg{max-width:80vw}.hero{position:relative}.hero::before{content:"";position:absolute;inset:-30px 0 auto;height:380px;background:radial-gradient(60% 60% at 50% 0,rgba(79,109,245,.22),transparent);z-index:-1;pointer-events:none}
.cd{transition:transform .25s,border-color .25s,box-shadow .25s}.cd:hover{transform:translateY(-3px);box-shadow:0 12px 30px rgba(0,0,0,.1)}
.rv{opacity:0;transform:translateY(18px);transition:opacity .7s,transform .7s}.rv.v{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.rv{opacity:1;transform:none;transition:none}html{scroll-behavior:auto}}
.aif{position:fixed;right:18px;bottom:calc(18px + env(safe-area-inset-bottom,0px));width:52px;height:52px;border-radius:50%;border:0;background:linear-gradient(135deg,#6d4cf0,var(--ac2));color:#fff;font-size:20px;cursor:pointer;z-index:45;box-shadow:0 8px 24px rgba(79,109,245,.4)}
.aib{position:fixed;right:18px;bottom:calc(80px + env(safe-area-inset-bottom,0px));width:360px;max-width:calc(100vw - 24px);height:min(480px,70vh);background:var(--cd);border:1px solid var(--ln);border-radius:20px;z-index:45;display:flex;flex-direction:column;box-shadow:0 20px 50px rgba(0,0,0,.25);overflow:hidden}
.ah{padding:14px 16px;border-bottom:1px solid var(--ln);display:flex;justify-content:space-between}.am{flex:1;overflow:auto;padding:14px;display:flex;flex-direction:column;gap:8px}.b{max-width:85%;padding:9px 13px;border-radius:16px;font-size:15px;white-space:pre-wrap}.b.assistant{background:var(--bg2);align-self:flex-start}.b.user{background:var(--ac);color:#fff;align-self:flex-end}
.ar{display:flex;gap:8px;padding:10px;border-top:1px solid var(--ln)}.ar input{flex:1;min-width:0;font:inherit;font-size:16px;border:1px solid var(--ln);border-radius:980px;padding:8px 14px;background:var(--bg);color:var(--tx);outline:0}
@media(pointer:coarse){.btn,.sb,.ib{min-height:44px}.btn.sm{display:inline-flex;align-items:center}}
@media(min-width:1400px){.in,.nw{max-width:1240px}}
@media(max-width:1024px){.sh{grid-template-columns:200px 1fr}section{padding:64px 24px}.hero{padding:70px 20px}}
@media(max-width:720px){body{font-size:16px}html{scroll-padding-top:110px}.nw{height:auto;flex-wrap:wrap;padding:8px 14px;gap:6px 10px}.br{margin-right:auto}.nl{order:3;width:100%;margin:0;gap:20px;padding:4px 0 6px}.hero{padding:48px 18px 56px}section{padding:52px 18px}.ms{padding:30px 22px}.cd{padding:20px}.gr{grid-template-columns:1fr}
.sh{grid-template-columns:1fr}aside{position:static;height:auto;flex-direction:row;flex-wrap:wrap;border-right:0;border-bottom:1px solid var(--ln);padding:12px}aside .lg,.sp{display:none}.sb{padding:8px 12px}main{padding:22px 14px 90px}.fl{grid-template-columns:1fr}.aib{right:12px;left:12px;width:auto;max-width:none}.fb{width:calc(100% - 24px);justify-content:space-between}}