/* Infoloop — unified model API. No build step, no dependencies. */

:root{
  --ink:#0A1020;
  --ink-2:#1B2440;
  --body:#3D4762;
  --muted:#79839C;
  --line:#E5E8F0;
  --line-2:#CDD4E4;
  --bg:#FFFFFF;
  --bg-alt:#F6F8FC;
  --deep:#080C18;
  --deep-2:#111930;
  --brand:#4460F7;
  --brand-2:#7B5CFF;
  --brand-dark:#2F46CE;
  --wash:#EEF1FE;
  --cyan:#1FBFD4;
  --ok:#12A672;
  --radius:12px;
  --maxw:1180px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:var(--font);font-size:17px;line-height:1.65;color:var(--body);background:var(--bg);-webkit-font-smoothing:antialiased}
img,svg{max-width:100%}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{color:var(--ink);line-height:1.2;margin:0 0 .5em;font-weight:680;letter-spacing:-.02em}
h1{font-size:clamp(2.15rem,1.3rem + 3.2vw,3.6rem);letter-spacing:-.033em;line-height:1.08}
h2{font-size:clamp(1.6rem,1.15rem + 1.7vw,2.4rem);letter-spacing:-.028em}
h3{font-size:1.13rem;font-weight:660;letter-spacing:-.012em}
p{margin:0 0 1.1em}
ul,ol{margin:0 0 1.1em;padding-left:1.25em}
li{margin-bottom:.5em}
strong{color:var(--ink);font-weight:660}
:focus-visible{outline:3px solid var(--brand);outline-offset:2px;border-radius:5px}
code{font-family:var(--mono);font-size:.92em}

.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}
.narrow{max-width:var(--maxw)}
.narrow>*{max-width:780px}
.narrow.center>*{margin-left:auto;margin-right:auto}
.skip{position:absolute;left:-9999px}
.skip:focus{left:12px;top:12px;z-index:100;background:#fff;padding:10px 16px;border-radius:6px}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}
.site-header .container{display:flex;align-items:center;gap:18px;padding-top:14px;padding-bottom:14px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:700;font-size:1.14rem;letter-spacing:-.028em;margin-right:auto}
.brand:hover{text-decoration:none}
.brand .mark{flex:none}
.nav{display:flex;align-items:center;gap:2px}
.nav a{color:var(--ink-2);font-size:.94rem;font-weight:550;padding:8px 12px;border-radius:8px;white-space:nowrap}
.nav a:hover{background:var(--bg-alt);text-decoration:none;color:var(--ink)}
.nav a[aria-current="page"]{color:var(--brand);background:var(--wash)}
.nav .lang{margin-left:6px;padding-left:14px;border-left:1px solid var(--line);font-size:.88rem;color:var(--muted);font-weight:640}
.nav .lang:hover{color:var(--brand);background:transparent}
.nav .cta{margin-left:8px;background:var(--ink);color:#fff;padding:9px 17px;font-weight:600}
.nav .cta:hover{background:var(--brand);text-decoration:none;color:#fff}
.nav-toggle{display:none;background:none;border:1px solid var(--line-2);border-radius:9px;padding:7px 11px;cursor:pointer;color:var(--ink);font-size:.9rem}
@media (max-width:980px){
  .nav-toggle{display:block}
  .nav{position:absolute;left:0;right:0;top:100%;flex-direction:column;align-items:stretch;gap:0;background:#fff;border-bottom:1px solid var(--line);padding:8px 16px 18px;box-shadow:0 18px 40px rgba(10,16,32,.09)}
  .nav[hidden]{display:none}
  .nav a{padding:12px 10px;font-size:1rem}
  .nav .lang{margin-left:0;padding-left:10px;border-left:0;border-top:1px solid var(--line);margin-top:8px;padding-top:15px;border-radius:0}
  .nav .cta{margin-left:0;margin-top:10px;text-align:center}
}

/* ---------- buttons ---------- */
.btn{display:inline-block;padding:14px 26px;border-radius:9px;font-size:.97rem;font-weight:640;border:1px solid transparent;cursor:pointer;letter-spacing:-.006em}
.btn:hover{text-decoration:none}
.btn--primary{background:var(--brand);color:#fff}
.btn--primary:hover{background:var(--brand-dark);color:#fff}
.btn--light{background:#fff;color:var(--ink);border-color:var(--line-2)}
.btn--light:hover{border-color:var(--brand);color:var(--brand)}
.btn--onDark{background:rgba(255,255,255,.09);color:#fff;border-color:rgba(255,255,255,.26)}
.btn--onDark:hover{background:rgba(255,255,255,.16);color:#fff}

/* ---------- sections ---------- */
.section{padding:88px 0}
.section--alt{background:var(--bg-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section--deep{background:var(--deep);color:#A8B4CE}
.section--deep h2,.section--deep h3,.section--deep h4{color:#fff}
.section--deep strong{color:#fff}
.eyebrow{display:block;font-size:.74rem;font-weight:700;letter-spacing:.15em;text-transform:uppercase;color:var(--brand);margin-bottom:14px}
.section--deep .eyebrow{color:#8FA6FF}
.lede{font-size:1.14rem;line-height:1.62;color:var(--ink-2)}
.section--deep .lede{color:#BDC8E0}
.section-head{max-width:720px;margin-bottom:48px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}

/* ---------- hero ---------- */
.hero{position:relative;background:var(--deep);color:#AEBAD4;overflow:hidden;padding:82px 0 86px}
.hero::before{content:"";position:absolute;inset:0;background:
  radial-gradient(760px 420px at 78% 6%, rgba(123,92,255,.34), transparent 62%),
  radial-gradient(620px 400px at 12% 96%, rgba(68,96,247,.28), transparent 60%);pointer-events:none}
.hero::after{content:"";position:absolute;inset:0;opacity:.5;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:56px 56px;mask-image:radial-gradient(circle at 50% 0%,#000,transparent 72%)}
.hero .container{position:relative;z-index:1}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
@media (max-width:980px){.hero-grid{grid-template-columns:1fr;gap:40px}}
.hero h1{color:#fff;max-width:14ch}
.hero .lede{color:#C3CEE6;font-size:1.2rem;max-width:52ch}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.hero-note{margin-top:26px;font-size:.9rem;color:#8494B4}

/* code card */
.code{background:#0E1526;border:1px solid rgba(255,255,255,.13);border-radius:14px;overflow:hidden;box-shadow:0 30px 70px rgba(0,0,0,.42)}
.code-bar{display:flex;align-items:center;gap:7px;padding:13px 16px;border-bottom:1px solid rgba(255,255,255,.09);background:rgba(255,255,255,.03)}
.code-bar i{width:11px;height:11px;border-radius:50%;background:rgba(255,255,255,.2);display:block}
.code-bar span{margin-left:8px;font-family:var(--mono);font-size:.76rem;color:#7B8AAC;letter-spacing:.02em}
.code pre{margin:0;padding:20px 18px;overflow-x:auto;font-family:var(--mono);font-size:.83rem;line-height:1.75;color:#C9D5EE}
.code .k{color:#9B8CFF}.code .s{color:#5FD3A8}.code .c{color:#5C6B8C}.code .f{color:#6FA8FF}

/* ---------- model chips ---------- */
.chips{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.chip-group{margin-bottom:36px}
.chip-group:last-child{margin-bottom:0}
.chip-label{display:block;text-align:center;font-size:.75rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-bottom:16px}
.chip{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);border-radius:999px;padding:9px 18px;font-size:.92rem;font-weight:600;color:var(--ink-2)}
.chip b{width:7px;height:7px;border-radius:50%;background:var(--brand);display:block;flex:none}
.chip--cloud{background:var(--ink);color:#fff;border-color:var(--ink)}
.chip--cloud b{background:#8FA6FF}

/* ---------- cards ---------- */
.grid{display:grid;gap:22px}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--2{grid-template-columns:repeat(2,1fr)}
.grid--4{grid-template-columns:repeat(4,1fr)}
@media (max-width:980px){.grid--3,.grid--4{grid-template-columns:repeat(2,1fr)}}
@media (max-width:680px){.grid--3,.grid--2,.grid--4{grid-template-columns:1fr}}

.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;transition:border-color .15s,transform .15s,box-shadow .15s}
.card:hover{border-color:var(--line-2);transform:translateY(-2px);box-shadow:0 14px 34px rgba(10,16,32,.07)}
.card h3{margin-bottom:.45em}
.card p:last-child{margin-bottom:0}
.card .ico{width:42px;height:42px;border-radius:11px;background:var(--wash);color:var(--brand);display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.section--deep .card{background:rgba(255,255,255,.045);border-color:rgba(255,255,255,.12)}
.section--deep .card:hover{border-color:rgba(255,255,255,.24);box-shadow:none}
.section--deep .card .ico{background:rgba(255,255,255,.1);color:#A9BEFF}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:s;list-style:none;padding:0;margin:0}
@media (max-width:980px){.steps{grid-template-columns:repeat(2,1fr)}}
@media (max-width:620px){.steps{grid-template-columns:1fr}}
.steps>li{counter-increment:s;margin:0;padding-top:22px;border-top:2px solid var(--line)}
.steps>li::before{content:"0" counter(s);display:block;font-family:var(--mono);font-size:.86rem;font-weight:700;color:var(--brand);margin-bottom:12px;letter-spacing:.04em}
.steps h3{margin-bottom:.4em}
.steps p{font-size:.96rem;margin-bottom:0}

/* ---------- feature list ---------- */
.ticks{list-style:none;padding:0;margin:0}
.ticks li{position:relative;padding-left:30px;margin-bottom:13px}
.ticks li::before{content:"";position:absolute;left:0;top:.5em;width:16px;height:16px;border-radius:50%;background:var(--wash)}
.ticks li::after{content:"";position:absolute;left:5px;top:.76em;width:6px;height:3px;border-left:2px solid var(--brand);border-bottom:2px solid var(--brand);transform:rotate(-45deg)}
.section--deep .ticks li::before{background:rgba(255,255,255,.14)}
.section--deep .ticks li::after{border-color:#A9BEFF}

/* ---------- split ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split--top{align-items:start}
@media (max-width:900px){.split{grid-template-columns:1fr;gap:36px}}

/* ---------- contact ---------- */
.contact-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 28px}
.contact-card h3{margin-bottom:.35em}
.contact-card p:last-child{margin-bottom:0}
.contact-card a{font-weight:600}

/* ---------- deflist ---------- */
.deflist{border-top:1px solid var(--line);margin:0}
.deflist>div{display:grid;grid-template-columns:250px 1fr;gap:8px 32px;padding:18px 0;border-bottom:1px solid var(--line)}
.deflist dt{color:var(--ink);font-weight:650;font-size:.96rem}
.deflist dd{margin:0}
@media (max-width:720px){.deflist>div{grid-template-columns:1fr;gap:4px}}

/* ---------- footer ---------- */
.site-footer{background:var(--deep);color:#8695B4;font-size:.93rem;padding:62px 0 28px}
.site-footer h4{color:#fff;font-size:.76rem;letter-spacing:.14em;text-transform:uppercase;margin-bottom:16px;font-weight:700}
.site-footer a{color:#AFBEDA}
.site-footer a:hover{color:#fff}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:40px}
@media (max-width:1000px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr;gap:32px}}
@media (max-width:760px){.footer-grid{grid-template-columns:1fr 1fr;gap:28px}}
@media (max-width:480px){.footer-grid{grid-template-columns:1fr;gap:26px}}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin-bottom:9px}
.site-footer address{font-style:normal;line-height:1.75}
.footer-bottom{border-top:1px solid rgba(255,255,255,.11);margin-top:44px;padding-top:22px;display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between;font-size:.86rem;color:#697A9B}

.muted{color:var(--muted)}
.small{font-size:.9rem}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}
.center{text-align:center}
.mb-0{margin-bottom:0}
.todo{background:#FFF6E6;border:1px dashed #E8CF9B;border-radius:5px;padding:1px 7px;color:#8A6416;font-size:.9em;font-weight:600}

/* ---------- platform band ---------- */
.section--tightband{padding:0 0 10px}
.platform-band{
  display:grid;grid-template-columns:1fr auto;gap:40px;align-items:center;
  background:var(--bg-alt);border:1px solid var(--line);border-radius:var(--radius);
  padding:32px 34px;
}
.platform-band p{color:var(--body)}
.platform-links{display:flex;flex-wrap:wrap;gap:10px;justify-content:flex-end}
.platform-band>div:first-child{max-width:56ch}
.platform-links .btn{padding:11px 18px;font-size:.9rem}
@media (max-width:900px){
  .platform-band{grid-template-columns:1fr;gap:22px;padding:26px 22px}
  .platform-links{justify-content:flex-start}
}

/* ---------- Chinese typography ---------- */
html[lang^="zh"] body{font-size:16.5px;line-height:1.85}
html[lang^="zh"] h1,html[lang^="zh"] h2,html[lang^="zh"] h3,html[lang^="zh"] h4{letter-spacing:0;line-height:1.38}
html[lang^="zh"] h1{line-height:1.24;max-width:17ch}
html[lang^="zh"] .lede{line-height:1.85;max-width:40em}
html[lang^="zh"] .eyebrow{letter-spacing:.08em}
html[lang^="zh"] .chip-label{letter-spacing:.06em}
html[lang^="zh"] .brand{letter-spacing:0}
html[lang^="zh"] .deflist>div{grid-template-columns:200px 1fr}
html[lang^="zh"] .steps>li::before{letter-spacing:.04em}
@media (max-width:720px){html[lang^="zh"] .deflist>div{grid-template-columns:1fr}}