:root{
  color-scheme:dark;
  --bg:#070d14;
  --bg2:#09121b;
  --panel:#0b1722cc;
  --panel2:#0d1b28;
  --text:#e2ebf2;
  --muted:#9baebb;
  --soft:#68859a;
  --line:#8cabc026;
  --line2:#8cabc03d;
  --cyan:#72d5ed;
  --cyan2:#58aeca;
  --blue:#739fff;
  --violet:#8f78e9;
  font-family:Inter,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  font-synthesis:none;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:112px}
body{margin:0;background:
  radial-gradient(1100px 620px at 78% -8%,rgba(39,111,155,.16),transparent 62%),
  radial-gradient(800px 520px at 12% 42%,rgba(65,76,164,.08),transparent 64%),
  var(--bg);color:var(--text);font-weight:350}
body:before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:-1;
  background:
    linear-gradient(90deg,rgba(5,10,14,.28),transparent 48%,rgba(5,10,14,.16)),
    repeating-linear-gradient(90deg,transparent 0,transparent calc(25% - 1px),rgba(132,169,192,.025) 25%);
}
a{color:inherit;text-decoration:none}
button,select{font:inherit;color:inherit}
a:focus-visible,button:focus-visible,select:focus-visible{outline:2px solid var(--cyan);outline-offset:5px}
.skip{position:fixed;top:-100px;left:20px;z-index:1000;padding:11px 15px;background:#18364a;border-radius:8px}
.skip:focus{top:12px}

/* Header */
.header{
  height:88px;display:flex;align-items:center;gap:42px;padding:0 4.7%;
  position:sticky;top:0;z-index:40;background:rgba(7,13,20,.88);
  backdrop-filter:blur(20px);border-bottom:1px solid rgba(158,185,205,.08)
}
.brand{display:flex;align-items:center;flex:none}
.brand img{display:block;width:123px;height:auto}
.header nav{display:flex;align-items:center;gap:27px;font-size:13px;color:#91a9b9}
.header nav a{padding:11px 0;position:relative;white-space:nowrap}
.header nav a:hover,.header nav a.active{color:#e5f4fb}
.header nav a.active:after{content:"";position:absolute;left:0;right:0;bottom:2px;height:1px;background:#69b8d4}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.language-control{
  height:38px;display:flex;align-items:center;gap:7px;border:1px solid rgba(120,145,165,.25);
  background:rgba(11,21,29,.8);border-radius:10px;padding:0 10px;color:#a9bac3
}
.language-control span{font-size:12px;color:#7fa9bd}
.language-control select{
  appearance:none;-webkit-appearance:none;border:0;outline:0;background:transparent;color:#d8e5e9;
  font-size:12px;padding:0 18px 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 option{background:#0b1218;color:#e6f0f3}
.workspace{
  height:38px;display:flex;align-items:center;gap:8px;padding:0 15px;border-radius:10px;
  border:1px solid rgba(115,159,255,.35);
  background:linear-gradient(135deg,rgba(14,174,230,.10),rgba(114,66,235,.15));
  color:#edf8ff;font-size:12px;font-weight:500
}
.workspace:hover{border-color:rgba(134,198,255,.7);background:linear-gradient(135deg,rgba(16,190,238,.16),rgba(126,76,244,.22))}
.menu-toggle{display:none;border:0;background:transparent;width:34px;height:34px;padding:4px}
.menu-toggle span{display:block;width:21px;height:1px;background:#a6c6da;margin:6px auto}
.mobile-nav{display:none}

/* Hero */
.hero{max-width:1240px;margin:0 auto;padding:100px 42px 64px;position:relative}
.eyebrow{font:10px/1.8 ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:2.3px;color:#6f94ac;text-transform:uppercase}
.hero h1{font-size:clamp(43px,5.2vw,74px);line-height:1.23;letter-spacing:-2.5px;font-weight:300;margin:24px 0 22px;max-width:900px}
.hero h1 .accent{
  background:linear-gradient(115deg,#d9e8f2 5%,#91d4e7 55%,#aaa7ea);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent
}
.hero .lead{max-width:760px;font-size:17px;line-height:2;color:#9eb5c5;margin:0}
.hero-meta{display:flex;gap:35px;flex-wrap:wrap;margin-top:34px;padding-top:22px;border-top:1px solid var(--line);max-width:900px}
.hero-meta div{display:flex;flex-direction:column;gap:7px}
.hero-meta small{font:9px ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:1.5px;color:#5c7e95;text-transform:uppercase}
.hero-meta span{font-size:13px;color:#b7cbd8}
.hero-orbit{position:absolute;right:55px;top:78px;width:180px;height:180px;opacity:.28;pointer-events:none}
.hero-orbit:before,.hero-orbit:after{content:"";position:absolute;border:1px solid #4e9cbd;border-radius:50%}
.hero-orbit:before{inset:10px 45px;transform:rotate(46deg)}
.hero-orbit:after{inset:45px 10px;transform:rotate(-46deg)}
.hero-orbit i{position:absolute;left:87px;top:87px;width:6px;height:6px;border-radius:50%;background:#bdeeff;box-shadow:0 0 24px #61dfff}

/* Reading layout */
.shell{max-width:1240px;margin:0 auto;padding:18px 42px 110px;display:grid;grid-template-columns:245px minmax(0,1fr);gap:74px}
.toc{position:sticky;top:122px;align-self:start;border-top:1px solid var(--line2);padding-top:19px}
.toc-label{font:9px ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:2px;color:#5f849b;margin-bottom:16px;text-transform:uppercase}
.toc a{display:block;padding:8px 0;font-size:12px;line-height:1.55;color:#708da1;transition:.2s}
.toc a:hover,.toc a.current{color:#d8edf7;transform:translateX(3px)}
.toc .toc-contact{margin-top:21px;padding-top:19px;border-top:1px solid var(--line);font-size:11px;color:#66879d}
.toc .toc-contact a{color:#a4c7d9;padding-top:6px}
.legal-article{min-width:0}
.notice{
  border:1px solid rgba(118,167,199,.22);background:linear-gradient(135deg,rgba(15,31,45,.82),rgba(10,20,31,.74));
  border-radius:8px;padding:21px 24px;margin:0 0 28px;display:flex;gap:16px;align-items:flex-start
}
.notice .dot{width:7px;height:7px;border-radius:50%;background:#71d0e8;box-shadow:0 0 16px rgba(91,215,241,.7);margin-top:9px;flex:none}
.notice p{margin:0;font-size:13px;line-height:1.9;color:#94adbd}
.legal-section{padding:39px 0;border-top:1px solid var(--line);scroll-margin-top:108px}
.legal-section:first-of-type{border-top:0;padding-top:12px}
.section-number{font:10px ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:1.4px;color:#5585a2;margin-bottom:12px}
.legal-section h2{font-size:27px;line-height:1.45;font-weight:400;letter-spacing:-.5px;margin:0 0 20px;color:#d9e9f4}
.legal-section h2 small{display:block;font-size:13px;font-weight:400;letter-spacing:.2px;color:#63849a;margin-top:6px}
.legal-section h3{font-size:17px;line-height:1.6;font-weight:450;margin:27px 0 10px;color:#bfd5e3}
.legal-section p,.legal-section li{font-size:15px;line-height:2;color:#98afbf}
.legal-section p{margin:0 0 16px}
.legal-section ul,.legal-section ol{margin:14px 0 19px;padding-left:22px}
.legal-section li{padding:3px 0 3px 5px}
.legal-section strong{color:#d3e6f0;font-weight:500}
.policy-callout{
  margin:25px 0;padding:23px 25px;border-left:2px solid #63bdd9;
  background:linear-gradient(90deg,rgba(24,60,80,.23),rgba(12,24,34,.14));
  color:#afc8d8;font-size:14px;line-height:2
}
.policy-callout .en{display:block;color:#d6e8f1;margin-bottom:8px}
.info-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:13px;margin:22px 0}
.info-card{border:1px solid var(--line);background:rgba(10,21,31,.55);border-radius:7px;padding:19px}
.info-card span{display:block;font:9px ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:1.3px;color:#56819c;margin-bottom:9px}
.info-card strong{display:block;font-size:14px;font-weight:450;color:#c5dce8;margin-bottom:7px}
.info-card p{font-size:13px;line-height:1.75;margin:0;color:#7896aa}
.action-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:25px}
.action-btn{
  display:inline-flex;align-items:center;gap:10px;border:1px solid rgba(114,191,220,.35);background:#102333;
  border-radius:30px;padding:11px 18px;font-size:12px;color:#cfe7f4
}
.action-btn:hover{border-color:#6fc4e3;background:#153044}
.action-btn.secondary{background:transparent;border-color:rgba(151,177,194,.22);color:#93aebe}
.process{counter-reset:step;display:grid;gap:12px;margin:24px 0}
.process .step{display:grid;grid-template-columns:45px 1fr;gap:16px;padding:19px;border:1px solid var(--line);border-radius:7px;background:rgba(10,21,31,.48)}
.process .step:before{counter-increment:step;content:counter(step,decimal-leading-zero);font:14px ui-monospace,SFMono-Regular,Menlo,monospace;color:#5eaac7;padding-top:2px}
.process .step strong{display:block;font-size:15px;margin-bottom:7px}
.process .step p{font-size:13px;line-height:1.8;margin:0}

/* Language */
[data-lang-panel]{display:none}
html[data-lang="zh-CN"] [data-lang-panel="zh-CN"],
html[data-lang="en"] [data-lang-panel="en"]{display:block}

/* Footer */
.footer{border-top:1px solid var(--line);max-width:1240px;margin:0 auto;padding:38px 42px 31px}
.footer-top{display:flex;align-items:flex-start;justify-content:space-between;gap:30px;padding-bottom:34px}
.footer-brand img{width:114px;height:auto;display:block;margin-bottom:13px}
.footer-brand p{margin:0;color:#67889d;font-size:11px;letter-spacing:1px}
.footer-links{display:grid;grid-template-columns:repeat(2,minmax(140px,1fr));gap:10px 35px;font-size:12px;color:#849fb3}
.footer-links a:hover{color:#cbe4f1}
.footer-bottom{border-top:1px solid rgba(129,158,181,.08);padding-top:23px;display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap;font-size:10px;letter-spacing:.4px;color:#587a91}
.footer-bottom .motto{font:9px ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:2px}

/* English */
html[data-lang="en"] .hero h1{letter-spacing:-2.1px}
html[data-lang="en"] .legal-section p,
html[data-lang="en"] .legal-section li{line-height:1.85}

/* Mobile */
@media(max-width:900px){
  .header{padding:0 28px;gap:20px}
  .header nav{display:none}
  .menu-toggle{display:block}
  .mobile-nav:not([hidden]){display:flex;position:fixed;z-index:35;left:0;right:0;top:88px;background:rgba(8,17,25,.97);backdrop-filter:blur(20px);padding:20px 28px;flex-direction:column;border-bottom:1px solid var(--line)}
  .mobile-nav a{padding:13px 0;color:#acc8d9;font-size:14px}
  .shell{grid-template-columns:1fr;gap:24px}
  .toc{position:static;display:flex;gap:9px;overflow-x:auto;border-top:0;border-bottom:1px solid var(--line);padding:0 0 16px;scrollbar-width:none}
  .toc::-webkit-scrollbar{display:none}
  .toc-label,.toc-contact{display:none!important}
  .toc a{flex:none;padding:7px 11px;border:1px solid var(--line);border-radius:20px;font-size:11px}
  .toc a:hover,.toc a.current{transform:none;border-color:#629ab8}
  .hero-orbit{opacity:.16;right:20px}
}
@media(max-width:650px){
  .header{height:72px;padding:0 21px}
  .brand img{width:104px}
  .workspace{display:none}
  .language-control{height:34px;padding:0 8px}
  .language-control span{display:none}
  .language-control select{font-size:11px;max-width:115px}
  .mobile-nav:not([hidden]){top:72px;padding:18px 22px}
  .hero{padding:70px 23px 48px}
  .eyebrow{font-size:9px;letter-spacing:1.5px}
  .hero h1{font-size:clamp(38px,10vw,56px);line-height:1.28;letter-spacing:-1.6px;margin-top:20px}
  .hero .lead{font-size:15px;line-height:1.9}
  .hero-meta{gap:22px;margin-top:26px}
  .hero-meta span{font-size:12px}
  .hero-orbit{width:120px;height:120px;top:45px;right:10px}
  .hero-orbit:before{inset:8px 30px}.hero-orbit:after{inset:30px 8px}.hero-orbit i{left:57px;top:57px}
  .shell{padding:0 23px 75px}
  .notice{padding:17px 18px}
  .legal-section{padding:31px 0}
  .legal-section h2{font-size:23px}
  .legal-section p,.legal-section li{font-size:14px;line-height:1.95}
  .info-grid{grid-template-columns:1fr}
  .footer{padding:32px 23px 25px}
  .footer-top{flex-direction:column}
  .footer-links{width:100%;grid-template-columns:1fr 1fr;gap:12px 20px}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}


/* IUAI_CONTACT_DIRECTORY_V1_20261030 */
.contact-identity{
  margin:8px 0 26px;padding:22px 24px;border:1px solid var(--line2);border-radius:8px;
  background:linear-gradient(135deg,rgba(14,31,45,.72),rgba(10,20,30,.46))
}
.contact-identity .company-name{display:block;font-size:19px;line-height:1.45;font-weight:450;color:#d9eaf4}
.contact-identity .product-name{display:block;margin-top:6px;font:10px ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:1.8px;color:#60869e}
.contact-directory,.contact-system{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:13px;margin:21px 0 8px}
.contact-system{margin-top:16px;padding-top:18px;border-top:1px solid var(--line)}
.contact-card{min-height:122px;padding:19px 20px;border:1px solid var(--line);border-radius:7px;background:rgba(9,20,29,.56)}
.contact-card:hover{border-color:rgba(103,177,208,.34);background:rgba(13,27,39,.7)}
.contact-card .contact-type{display:block;font:9px ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:1.45px;color:#57829c;margin-bottom:11px}
.contact-card strong{display:block;font-size:14px;font-weight:450;color:#c9dfe9;margin-bottom:8px}
.contact-card a{font-size:14px;color:#9fc4d6;word-break:break-word}
.contact-card p{font-size:12px!important;line-height:1.7!important;color:#6f8da1!important;margin:7px 0 0!important}
.contact-note{margin-top:18px!important;font-size:12px!important;color:#6b8799!important}
@media(max-width:650px){
  .contact-directory,.contact-system{grid-template-columns:1fr}
  .contact-card{min-height:auto}
  .contact-identity{padding:18px}
  .contact-identity .company-name{font-size:17px}
}

/* IUAI policy popup and small-window reading layout, 2026-10-30. */
@media(max-width:1280px){
 .header{height:auto;min-height:88px;flex-wrap:wrap;gap:12px 20px;padding:16px 28px 8px}
 .header>.brand{order:0}.header>.header-actions{order:1;margin-left:auto}
 .header>nav{order:2;display:flex!important;flex:0 0 100%;max-width:100%;gap:20px;overflow-x:auto;scrollbar-width:thin;padding:0 0 8px}
 .header>nav a{flex:none;font-size:12px;padding:8px 0}
 .header .menu-toggle{display:none}
 .mobile-nav:not([hidden]){display:none}
 html{scroll-padding-top:145px}.legal-section{scroll-margin-top:145px}
}
@media(max-width:1050px){
 .hero{padding:42px 32px 28px}.hero h1{font-size:clamp(36px,5.5vw,54px);margin:16px 0}
 .hero .lead{font-size:15px;line-height:1.85}.hero-meta{margin-top:22px;padding-top:18px;gap:18px 28px}
 .shell{grid-template-columns:minmax(0,1fr);gap:22px;padding:0 32px 70px}
 .toc{position:static;display:block;max-width:100%;overflow:visible;border-top:0;border-bottom:1px solid var(--line);padding:0}
 .toc-label,.toc-contact{display:none!important}
 html[data-lang="zh-CN"] .toc>[data-lang-panel="zh-CN"],html[data-lang="en"] .toc>[data-lang-panel="en"]{display:flex;flex-wrap:nowrap;gap:8px;max-width:100%;overflow-x:auto;scrollbar-width:thin;padding:0 0 12px}
 .toc a{display:inline-flex;align-items:center;flex:none;white-space:nowrap;padding:8px 12px;border:1px solid var(--line);border-radius:20px;font-size:11px}
 .toc a:hover,.toc a.current{transform:none;border-color:#629ab8}
 .notice{margin-bottom:18px}.legal-section{padding:28px 0}
}
@media(max-width:650px){
 .header{min-height:72px;padding:12px 20px 4px;gap:8px 12px}.header>nav{gap:18px}
 .hero{padding:30px 22px 24px}.hero h1{font-size:38px}.hero .lead{font-size:14px}
 .hero-meta{gap:18px}.shell{padding:0 22px 60px}.notice{padding:16px}.hero-orbit{opacity:.1}
}