@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&display=swap');
:root{color-scheme:dark;--white:#eef6f7;--muted:#8e9b9f}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-snap-type:y mandatory}body{margin:0;background:#080e10;color:var(--white);font-family:Inter,Arial,sans-serif;font-weight:300}a{color:inherit;text-decoration:none}button{font:inherit;color:inherit;cursor:pointer}button:focus-visible,a:focus-visible{outline:1px solid white;outline-offset:8px}#field,.vignette{position:fixed;inset:0;width:100%;height:100%;pointer-events:none}.vignette{background:linear-gradient(90deg,rgba(5,10,12,.35),transparent 45%,rgba(5,10,12,.12)),linear-gradient(0deg,rgba(5,10,12,.9),transparent 17%,transparent 85%,rgba(5,10,12,.25));z-index:1}header{position:fixed;z-index:20;top:0;left:0;width:100%;padding:37px 6.6%;display:flex;align-items:center;justify-content:space-between}.brand{font-size:27px;font-weight:500;letter-spacing:-1.7px}.brand span{font-weight:300;color:#b7c2c5}#menuButton{width:42px;height:36px;border:0;background:none;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px}#menuButton span{width:25px;height:1px;background:#e0e8eb;transition:.3s}#menuButton[aria-expanded=true] span:first-child{transform:translateY(3.5px) rotate(45deg)}#menuButton[aria-expanded=true] span:last-child{transform:translateY(-3.5px) rotate(-45deg)}main{position:relative;z-index:2}section{min-height:100svh;position:relative;scroll-snap-align:start;padding:26vh 6.6% 17vh;display:flex;flex-direction:column;justify-content:center}.chapter{position:absolute;top:20%;font-size:12px;letter-spacing:2.2px;color:#849399}h1,h2{font-weight:300;font-size:clamp(42px,5.2vw,88px);line-height:1.1;letter-spacing:-.065em;margin:0;max-width:77%;text-shadow:0 2px 25px #080e1080}h1 span,h2 span{color:#8d9c9f}h1{margin-top:12vh}h2 sup{font-size:20px;vertical-align:top;line-height:3;margin-left:7px;letter-spacing:0}.intro-note{position:absolute;right:9%;bottom:21%;max-width:260px}.micro{font-size:11px;font-weight:500;letter-spacing:1.9px;color:#9ba9ac}.intro-note p{font-size:16px;line-height:1.6;color:#bac7ca}.description{position:absolute;right:9%;top:40%;width:29%;max-width:430px}.description h3{font-size:25px;line-height:1.3;font-weight:300;letter-spacing:-.7px;margin:24px 0}.description p{font-size:15px;line-height:1.8;color:#a7b5ba}.tags{display:flex;gap:20px;padding-top:18px;border-top:1px solid #798e932f;margin-top:25px;font-size:10px;letter-spacing:1px;color:#b5c2c6}#compute h2{font-size:clamp(50px,6.4vw,102px)}#neutrino h2{align-self:flex-start;margin-top:15vh}.model-tabs{display:flex;gap:24px;border-bottom:1px solid #3a464b;margin-top:24px}.model-tabs button{border:0;background:none;padding:12px 0;font-size:13px;color:#829399;border-bottom:1px solid transparent}.model-tabs button.active{color:#f2fcff;border-color:#f2fcff}.description .model-text{font-size:13px;min-height:48px;color:#7d9198}#solutions h2{font-size:clamp(38px,4.8vw,77px);max-width:65%;margin-top:10vh}#solutions .description{top:auto;bottom:23%;width:25%}.explore{margin-top:24px;display:flex;justify-content:space-between;border-bottom:1px solid #6a7b81;padding:15px 0;font-size:14px}.explore:hover{color:white;border-color:white}.rail{position:fixed;right:3.3%;top:43%;z-index:8;display:flex;flex-direction:column;gap:5px}.rail a{padding:0 10px;display:block;width:23px;height:37px;border-right:1px solid #52616555}.rail a.active{border-color:#e0f2f5}footer{position:fixed;bottom:30px;left:6.6%;right:6.6%;display:flex;align-items:center;gap:30px;z-index:10;color:#76868c;font-size:10px;letter-spacing:.8px}footer>span:first-child{margin-right:auto}footer button{font-size:10px;letter-spacing:1px;border:0;background:none;color:#87999e}#next{display:flex;gap:18px;align-items:center}.scroll-icon{display:block;width:14px;height:21px;border:1px solid #6b7e84;border-radius:8px;position:relative}.scroll-icon:after{content:'';position:absolute;width:2px;height:5px;background:#dae8eb;left:5px;top:4px;animation:wheel 1.8s infinite}.counter{margin-left:22px}b{font-weight:400;color:#d2e2e7}#menu{position:fixed;inset:0;background:#090f12f5;z-index:15;padding:19vh 14%;display:flex;flex-direction:column;gap:20px;visibility:hidden;opacity:0;transition:opacity .35s,visibility .35s}#menu.open{visibility:visible;opacity:1}#menu a{font-size:clamp(32px,5.5vw,78px);letter-spacing:-.05em;width:fit-content}#menu a:hover{color:#8da6b0}#menu small{font-size:12px;vertical-align:middle;margin-right:30px;color:#68818a;letter-spacing:1px}.menu-label,#menu p{font-size:12px;letter-spacing:2px;color:#718a94}#menu p{margin-top:30px}.menu-open{overflow:hidden}@keyframes wheel{0%,100%{transform:translateY(0);opacity:.4}50%{transform:translateY(5px);opacity:1}}@media(min-width:1500px){.description{right:11%}}@media(max-width:760px){header{padding:24px 7%}.brand{font-size:24px}section{padding:24vh 7% 15vh;justify-content:flex-start;min-height:100svh}.chapter{top:17%;font-size:10px;letter-spacing:1.4px}h1,h2{font-size:clamp(37px,8.5vw,62px);max-width:95%;line-height:1.14}h1{margin-top:15vh}.intro-note{position:static;margin-top:35px;max-width:250px}.intro-note .micro{display:none}.intro-note p{font-size:14px}.description{position:static;width:87%;max-width:400px;margin-top:35px}.description h3{font-size:20px;margin:14px 0}.description p{font-size:14px;line-height:1.6}.micro{font-size:10px}#compute h2{font-size:clamp(46px,12vw,76px)}#compute .description h3{display:none}#neutrino h2{margin-top:8vh}#solutions h2{max-width:100%;font-size:clamp(33px,8vw,60px);margin-top:12vh}#solutions .description{width:85%;margin-top:30px}.tags{font-size:9px;gap:15px}.rail{right:3%;top:41%}.rail a{height:28px;width:15px;padding:0 6px}footer{bottom:20px;left:7%;right:7%;gap:12px;font-size:9px}.foot-extra,.counter{display:none}footer button{font-size:9px}#next{gap:10px}#scrollLabel{display:none}#menu{padding:22vh 10%}.model-tabs{margin-top:12px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.scroll-icon:after{animation:none}}

/* IUAI identity: restrained spectrum, dark sea blue, ice silver. */
body{background:#070d14;font-family:Inter,"Microsoft YaHei","PingFang SC",sans-serif}h1,h2{letter-spacing:-.045em;line-height:1.22;font-weight:300}header .brand{display:flex;align-items:center}header .brand img{display:block;width:123px;height:auto}h1{font-size:clamp(52px,5.9vw,96px);margin-top:7vh;max-width:58%}h1 span,h2 span{color:#a1b5c3}.chapter{color:#7996ab;font-size:12px;letter-spacing:2px}.intro-note{right:8.6%;bottom:17%;max-width:300px}.intro-note p{color:#a9bfcd;line-height:1.9}.micro{color:#789caf;font-size:12px}.hero-caption{display:flex;align-items:center;gap:14px;font-size:10px;letter-spacing:2px;color:#638498;margin-top:30px}.tiny-rule{width:30px;height:1px;background:#00bcd9}.object-label{position:absolute;left:57%;top:77%;font-size:10px;letter-spacing:2px;color:#698ba0}.object-label span{display:block;margin-top:8px;font-size:11px;letter-spacing:4px;color:#8ba2b1}#compute h2{font-size:clamp(45px,5.7vw,86px)}#neutrino h2{font-size:clamp(45px,5.5vw,86px)}#solutions h2{font-size:clamp(45px,5.7vw,86px)}.description h3{font-size:28px;line-height:1.55}.description p{font-size:16px;line-height:2}.tags{font-size:13px;gap:32px}.model-tabs button{font-size:14px}.description .model-text{font-size:14px}.rail a.active{border-color:#8bcced}#menu a{letter-spacing:.02em;font-size:clamp(32px,4.5vw,68px)}footer{font-size:11px}footer button{font-size:12px}.explore{font-size:16px}.vignette{background:linear-gradient(90deg,#050b134a,transparent 55%),linear-gradient(0deg,#050b13e0,transparent 16%,transparent 85%,#050b1320)}
@media(max-width:760px){header .brand img{width:105px}h1{font-size:clamp(40px,9.8vw,64px);margin-top:26vh;max-width:100%;line-height:1.22}.chapter{font-size:10px}.hero-caption{font-size:8px;letter-spacing:1.1px;margin-top:20px}.intro-note{margin-top:17px}.intro-note p{font-size:14px;margin:0}.object-label{top:23%;left:auto;right:7%;font-size:9px}.object-label span{font-size:10px;letter-spacing:2px}#compute h2,#neutrino h2,#solutions h2{font-size:clamp(36px,9vw,62px)}.description h3{font-size:22px}.description p{font-size:15px;line-height:1.8}.description{margin-top:26px}.tags{font-size:12px}.micro{font-size:11px}footer{font-size:10px}footer button{font-size:11px}#menu a{font-size:38px}}
@media(max-height:650px) and (max-width:760px){#intro{min-height:720px}section{min-height:760px}.intro-note p{max-width:300px}}

/* v3.8.1.6 — login + multilingual controls */
.header-actions{display:flex;align-items:center;gap:12px}.language-control{height:38px;display:flex;align-items:center;gap:7px;border:1px solid #7891a52f;background:#0b151dcc;border-radius:10px;padding:0 10px;color:#a9bac3;backdrop-filter:blur(16px)}.language-icon{font-size:13px;color:#7fa9bd}.language-control select{appearance:none;-webkit-appearance:none;border:0;outline:0;background:transparent;color:#d8e5e9;font:500 12px/1 Inter,"Microsoft YaHei","PingFang SC",sans-serif;padding:0 17px 0 0;cursor:pointer;background-image:linear-gradient(45deg,transparent 50%,#7f96a2 50%),linear-gradient(135deg,#7f96a2 50%,transparent 50%);background-position:calc(100% - 6px) 48%,calc(100% - 2px) 48%;background-size:4px 4px,4px 4px;background-repeat:no-repeat}.language-control select option{background:#0b1218;color:#e6f0f3}.login-link{height:38px;display:flex;align-items:center;gap:9px;border:1px solid #9cb9c33f;border-radius:10px;padding:0 15px;font-size:12px;font-weight:500;letter-spacing:.04em;color:#e6f1f4;background:#0d171ecc;backdrop-filter:blur(16px);transition:background .25s,border-color .25s,transform .25s}.login-link:hover{background:#14232d;border-color:#b8d7e288;transform:translateY(-1px)}.menu-login{margin-top:8px;color:#d8edf5!important}.menu-login small{color:#84c9e5!important}.header-actions #menuButton{flex:none}.header-actions .login-link:focus-visible,.language-control:focus-within{outline:1px solid #c5e5ef;outline-offset:4px}
@media(max-width:760px){.header-actions{gap:6px}.language-control{height:34px;padding:0 7px}.language-icon{display:none}.language-control select{font-size:11px;max-width:94px}.login-link{height:34px;padding:0 10px;font-size:11px}.header-actions #menuButton{width:34px;height:34px}}
@media(max-width:430px){.language-control select{width:78px}.login-link{padding:0 9px}.login-link span:last-child{display:none}}


/* IUAI Home v5.2.5 — static CTA only. No DOM observers or runtime injection. */
.free-start-link{
  height:38px;display:flex;align-items:center;gap:10px;padding:0 17px;border-radius:10px;
  border:1px solid rgba(115,159,255,.42);
  background:linear-gradient(135deg,rgba(14,174,230,.14),rgba(114,66,235,.20));
  color:#eef8ff;font-size:12px;font-weight:500;letter-spacing:.04em;
  box-shadow:0 0 0 1px rgba(80,210,255,.03) inset,0 0 22px rgba(90,98,255,.10);
  backdrop-filter:blur(16px);transition:transform .25s,border-color .25s,box-shadow .25s,background .25s;
}
.free-start-link:hover{transform:translateY(-1px);border-color:rgba(134,198,255,.75);background:linear-gradient(135deg,rgba(16,190,238,.20),rgba(126,76,244,.28));box-shadow:0 0 28px rgba(77,129,255,.20),0 0 16px rgba(50,220,255,.10) inset}
.free-start-link span:last-child{font-size:14px;color:#c8eaff}
#solutions .remeet-link{position:relative;color:#f3fbff;border-bottom-color:rgba(178,222,245,.72);text-shadow:0 0 10px rgba(174,225,255,.44),0 0 24px rgba(102,131,255,.24);transition:color .25s,border-color .25s,text-shadow .25s,filter .25s}
#solutions .remeet-link:before{content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;background:linear-gradient(90deg,rgba(130,225,255,.9),rgba(138,104,255,.6),rgba(130,225,255,.12));box-shadow:0 0 10px rgba(112,207,255,.5)}
#solutions .remeet-link:hover{color:#fff;border-color:#e7f8ff;text-shadow:0 0 12px rgba(211,242,255,.72),0 0 30px rgba(112,121,255,.40);filter:brightness(1.08)}
#solutions .remeet-link span:last-child{color:#d6efff;text-shadow:0 0 10px rgba(120,215,255,.55)}
@media(max-width:760px){.free-start-link{height:34px;padding:0 11px;font-size:11px;gap:6px}.free-start-link span:last-child{display:none}.header-actions{gap:5px}}
@media(max-width:520px){.language-control{max-width:94px}.login-link{padding:0 8px}.free-start-link{padding:0 9px}.header-actions #menuButton{width:30px}}

/* IUAI_EMAIL_CONTACTS_V535 */
.home-mail-links{display:flex;gap:14px;align-items:center;margin-left:18px}.home-mail-links a{color:inherit;text-decoration:none;opacity:.58;font-size:11px;letter-spacing:.02em}.home-mail-links a:hover{opacity:1}@media(max-width:760px){.home-mail-links{display:none}}


/* IUAI_GOOGLE_HOMEPAGE_MINIMAL_COMPLIANCE_V25_20261030 */
#solutions .google-min-compliance{margin-top:12px;padding-top:10px;max-width:440px;border-top:1px solid rgba(151,205,231,.25)}
#solutions .google-min-link{display:inline-flex;align-items:center;gap:8px;color:rgba(234,247,252,.94);text-decoration:none;font-size:12px;line-height:1.4}
#solutions .google-min-link:hover{color:rgba(142,225,248,.96)}
#solutions .google-min-purpose{display:block;margin-top:4px;color:rgba(144,169,184,.72);font-size:8px;line-height:1.35;letter-spacing:.02em}
#solutions .google-min-safety{display:block;margin-top:4px;color:rgba(116,142,157,.62);font-size:7px;line-height:1.35}
@media(max-width:760px){#solutions .google-min-compliance{margin-top:9px;padding-top:8px}#solutions .google-min-link{font-size:11px}#solutions .google-min-purpose{font-size:7.5px}#solutions .google-min-safety{font-size:6.5px}}