:root{
  --ink:#102654;
  --ink-soft:#506483;
  --line:#dfe6f8;
  --surface:#ffffff;
  --surface-soft:#f5f7ff;
  --blue:#286ff2;
  --violet:#7b4ce8;
  --green:#168b55;
  --coral:#d95c56;
  --navy:#101a38;
  --shadow:0 20px 50px rgba(35,66,138,.11);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--surface);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;letter-spacing:0}
body.menu-open{overflow:hidden}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit}
.skip-link{position:fixed;z-index:100;top:8px;left:8px;padding:10px 14px;background:#fff;color:var(--ink);transform:translateY(-150%)}
.skip-link:focus{transform:translateY(0)}
.section-shell{width:min(1160px,calc(100% - 48px));margin:0 auto}
.section-shell.wide{width:min(1320px,calc(100% - 48px))}
.site-header{position:fixed;z-index:50;top:0;right:0;left:0;height:72px;border-bottom:1px solid transparent;background:rgba(255,255,255,.92);backdrop-filter:blur(18px);transition:border-color .2s,box-shadow .2s}
.site-header.scrolled{border-color:#e6ebf7;box-shadow:0 8px 24px rgba(25,48,100,.06)}
.nav-shell{display:flex;width:min(1240px,calc(100% - 48px));height:100%;align-items:center;justify-content:space-between;margin:0 auto}
.brand{display:flex;align-items:center;gap:11px;color:#245de3;font-size:21px;font-weight:850}
.brand img{width:44px;height:44px;border-radius:8px;box-shadow:0 8px 18px rgba(55,79,189,.16)}
.site-nav{display:flex;align-items:center;gap:30px;color:#52627f;font-size:14px;font-weight:650}
.site-nav a:not(.nav-download):hover{color:var(--blue)}
.nav-download{padding:11px 17px;border-radius:8px;background:var(--ink);color:#fff}
.menu-button{display:none;width:42px;height:42px;align-items:center;justify-content:center;flex-direction:column;gap:5px;border:1px solid var(--line);border-radius:8px;background:#fff}
.menu-button span{width:18px;height:2px;background:var(--ink)}

.hero{position:relative;height:min(760px,calc(100svh - 34px));min-height:650px;overflow:hidden;padding-top:72px;background:#f8faff}
.hero::after{content:"";position:absolute;inset:0;background:rgba(248,250,255,.16);pointer-events:none}
.app-showcase{position:absolute;z-index:1;top:104px;right:max(9vw,120px);width:500px;height:570px}
.carousel-card{position:absolute;z-index:0;top:18px;left:50%;width:260px;aspect-ratio:1080/2209;border:1px solid #d7deef;border-radius:8px;background:#fff;box-shadow:0 20px 52px rgba(32,57,115,.14);object-fit:cover;object-position:top;opacity:0;transform:translateX(-50%) scale(.72);transition:transform .48s ease,opacity .48s ease,filter .48s ease;pointer-events:none}
.carousel-card.active{z-index:3;opacity:1;transform:translateX(-50%) scale(1);filter:none;pointer-events:auto}
.carousel-card.previous{z-index:2;opacity:.56;transform:translateX(-115%) scale(.82);filter:saturate(.78);pointer-events:auto;cursor:pointer}
.carousel-card.next{z-index:2;opacity:.56;transform:translateX(15%) scale(.82);filter:saturate(.78);pointer-events:auto;cursor:pointer}
.hero-inner{position:relative;z-index:2;width:min(1160px,calc(100% - 48px));margin:0 auto;padding-top:128px}
.eyebrow{margin:0 0 14px;color:#4264db;font-size:13px;font-weight:800;text-transform:uppercase}
.eyebrow.light{color:#9ec8ff}.eyebrow.green{color:var(--green)}.eyebrow.coral{color:var(--coral)}
.eyebrow.violet{color:#7651d7}
.hero h1{max-width:560px;margin:0;font-size:78px;line-height:1.04;font-weight:900}
.hero h1 span,.hero h1 small{display:inline-block}.hero h1 span{color:#17386d}.hero h1 small{margin-left:0;color:#7f4d58;font-size:1em;font-weight:820;vertical-align:0}
.hero-motto{margin:22px 0 0;color:#315f50;font-size:18px;font-weight:800}
.hero-lead{max-width:620px;margin:10px 0 0;color:#425a7e;font-size:19px;line-height:1.75}
.hero-actions{display:flex;align-items:center;gap:14px;margin-top:34px}
.hero-download{display:flex;align-items:center;gap:18px;width:max-content;margin:30px 0 0}
.hero-download img{width:132px;height:132px;padding:7px;border:1px solid #dbe2f1;background:#fff;box-shadow:0 12px 28px rgba(32,57,115,.12)}
.hero-download figcaption{display:flex;flex-direction:column;color:#203866}.hero-download strong{font-size:16px}.hero-download span{margin-top:8px;color:#71809c;font-size:12px}
.button{display:inline-flex;min-height:50px;align-items:center;justify-content:center;gap:10px;padding:0 22px;border:1px solid transparent;border-radius:8px;font-size:15px;font-weight:780;transition:transform .18s,box-shadow .18s}
.button:hover{transform:translateY(-2px)}
.button-primary{background:linear-gradient(110deg,var(--blue),var(--violet));box-shadow:0 14px 30px rgba(74,76,224,.23);color:#fff}
.button-secondary{border-color:#cfd9f2;background:rgba(255,255,255,.84);color:#233b6d}
.download-mark{font-size:20px;line-height:1}
.release-meta{display:flex;gap:0;margin-top:28px;color:#70809c;font-size:13px}
.release-meta span{padding:0 14px;border-right:1px solid #ced7ea}.release-meta span:first-child{padding-left:0}.release-meta span:last-child{border:0}

.feature-band{padding:96px 0 110px;background:#fff}
.section-heading{max-width:720px;margin-bottom:48px}.section-heading.compact{margin-bottom:40px}
.section-heading h2,.download-band h2,.legal-band h2{margin:0;font-size:43px;line-height:1.24;font-weight:870}
.section-heading>p:last-child{margin:18px 0 0;color:var(--ink-soft);font-size:17px;line-height:1.75}
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-item{margin:0;border:1px solid #e4e8f6;border-radius:8px;background:#fff;box-shadow:var(--shadow);overflow:hidden}
.feature-item img{width:100%;height:auto}

.workflow-band{padding:96px 0;background:#eff8f3;border-top:1px solid #deeee4;border-bottom:1px solid #deeee4}
.workflow-list{display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin:0;padding:0;list-style:none}
.workflow-list li{min-height:190px;padding:8px 44px 8px 0;border-right:1px solid #ccdfd2}
.workflow-list li+li{padding-left:44px}.workflow-list li:last-child{border:0}
.workflow-list span{color:var(--green);font-size:13px;font-weight:850}
.workflow-list h3{margin:28px 0 12px;font-size:24px}.workflow-list p{margin:0;color:#526b5e;font-size:15px;line-height:1.75}

.model-band{padding:104px 0;background:#f6f3ff;border-bottom:1px solid #e6dff7}
.model-intro{display:grid;grid-template-columns:.85fr 1.15fr;gap:90px;align-items:start}
.model-copy{padding-top:22px;border-top:1px solid #d8cfee}.model-copy p{margin:0;color:#586582;font-size:16px;line-height:1.85}.model-copy p+p{margin-top:16px;color:#35486f;font-weight:650}
.flow-diagram{margin-top:52px;padding:36px 34px;border:1px solid #ddd5f1;border-radius:8px;background:#fff;box-shadow:0 18px 46px rgba(67,52,126,.09)}
.flow-track{display:grid;grid-template-columns:minmax(145px,1fr) 32px minmax(145px,1fr) 32px minmax(145px,1fr) 32px minmax(145px,1fr) 32px minmax(145px,1fr);align-items:center}
.flow-node{display:flex;min-height:132px;flex-direction:column;justify-content:center;padding:19px;border:1px solid #dce3f6;border-radius:8px;background:#f8faff}
.flow-node strong{margin-top:13px;color:#203866;font-size:17px}.flow-node small{margin-top:8px;color:#71809c;font-size:12px;line-height:1.55}
.flow-owner{align-self:flex-start;padding:5px 8px;border-radius:5px;background:#e9efff;color:#315fc9;font-size:10px;font-weight:850}
.service-node{border-color:#ddd5f2;background:#faf8ff}.service-node .flow-owner{background:#eee8ff;color:#7050c2}
.model-node{border-color:#cfc1ee;background:#f3eeff}.model-node .flow-owner{background:#7651d7;color:#fff}.model-node strong{color:#4a2f8c}
.quality-node{border-color:#cfe3d7;background:#f2faf5}.quality-node .flow-owner{background:#dcefe3;color:#1b744a}.quality-node strong{color:#245f44}
.flow-arrow,.flow-loop{color:#8795b3;font-size:23px;text-align:center}.flow-loop{color:#7651d7;font-size:27px}
.flow-return{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:14px;margin:24px 0;color:#697793;font-size:12px}.flow-return span{height:1px;background:#dce2ef}
.result-track{grid-template-columns:minmax(160px,1fr) 44px minmax(160px,1fr) 44px minmax(160px,1fr);width:min(720px,100%);margin:0 auto}.result-node{min-height:112px}
.model-capabilities{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin:40px 0 0;padding:0;border-top:1px solid #dcd4ed;border-left:1px solid #dcd4ed;list-style:none}.model-capabilities li{display:flex;min-height:108px;flex-direction:column;padding:20px;border-right:1px solid #dcd4ed;border-bottom:1px solid #dcd4ed}.model-capabilities strong{color:#3d3360;font-size:15px}.model-capabilities span{margin-top:9px;color:#756e8b;font-size:12px;line-height:1.6}
.model-boundary{margin:24px 0 0;padding-left:15px;border-left:3px solid #d95c56;color:#756778;font-size:13px;line-height:1.7}


.download-band{padding:92px 0;background:var(--navy);color:#fff}
.download-layout{display:grid;grid-template-columns:.9fr 1.1fr;gap:90px;align-items:start}
.download-copy{max-width:530px;margin:20px 0 30px;color:#b8c4e0;font-size:16px;line-height:1.75}
.download-qr{width:max-content;margin:28px 0 0}.download-qr img{display:block;width:184px;height:184px;padding:9px;background:#fff}.download-qr figcaption{margin-top:12px;color:#b8c4e0;font-size:13px;text-align:center}
.release-table{margin:0;border-top:1px solid #33405f}
.release-table>div{display:grid;grid-template-columns:120px 1fr;gap:20px;padding:18px 0;border-bottom:1px solid #33405f}
.release-table dt{color:#8fa0c7}.release-table dd{margin:0;color:#f5f7ff}
.checksum-row{position:relative}.checksum-row code{display:block;max-width:480px;color:#c9d3ed;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:11px;line-height:1.6;word-break:break-all}
.copy-button{position:absolute;right:0;bottom:12px;padding:7px 11px;border:1px solid #52617f;border-radius:6px;background:transparent;color:#dce5fa;cursor:pointer}

.privacy-band{padding:104px 0;background:#fff}
.privacy-layout{display:grid;grid-template-columns:.72fr 1.28fr;gap:90px}
.privacy-points{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid #dcebe1;border-left:1px solid #dcebe1}
.privacy-points article{min-height:178px;padding:26px;border-right:1px solid #dcebe1;border-bottom:1px solid #dcebe1}
.privacy-points h3{margin:0 0 12px;color:#195f42;font-size:19px}.privacy-points p{margin:0;color:#526b5e;font-size:14px;line-height:1.75}

.faq-band{padding:104px 0;background:#fff8f7;border-top:1px solid #f5dfdc}
.faq-layout{display:grid;grid-template-columns:.7fr 1.3fr;gap:90px}.faq-heading{position:sticky;top:110px;align-self:start}
.faq-list{border-top:1px solid #ead6d3}
.faq-list details{border-bottom:1px solid #ead6d3}
.faq-list summary{display:flex;min-height:76px;align-items:center;justify-content:space-between;gap:20px;color:#392b39;font-size:17px;font-weight:750;cursor:pointer;list-style:none}
.faq-list summary::-webkit-details-marker{display:none}.faq-list summary span{color:var(--coral);font-size:25px;font-weight:400;transition:transform .2s}.faq-list details[open] summary span{transform:rotate(45deg)}
.faq-list details p{margin:-2px 44px 24px 0;color:#705d69;font-size:15px;line-height:1.75}

.legal-band{padding:72px 0;background:#fff}.legal-layout{display:grid;grid-template-columns:1fr 1fr;gap:90px;align-items:center}.legal-layout p:last-child{margin:0;color:#65738c;line-height:1.8}
.site-footer{padding:54px 0 38px;border-top:1px solid #e4e8f2;background:#f8f9fc}
.footer-layout{display:grid;grid-template-columns:1fr auto;gap:32px;align-items:start}
.footer-brand{display:flex;align-items:center;gap:12px}.footer-brand img{border-radius:8px}.footer-brand div{display:flex;flex-direction:column;gap:4px}.footer-brand span{color:#7a879e;font-size:13px}
.site-footer nav{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:22px;color:#53617a;font-size:13px}.site-footer nav a:hover{color:var(--blue)}
.site-footer>div>p{grid-column:1/-1;margin:8px 0 0;padding-top:24px;border-top:1px solid #e0e4ed;color:#8a95a8;font-size:12px}
.toast{position:fixed;z-index:100;right:24px;bottom:24px;padding:12px 16px;border-radius:8px;background:#13203f;color:#fff;box-shadow:var(--shadow);font-size:14px;opacity:0;transform:translateY(16px);pointer-events:none;transition:opacity .2s,transform .2s}.toast.show{opacity:1;transform:translateY(0)}

@media (max-width:980px){
  .app-showcase{right:12px;transform:scale(.86);transform-origin:top right;opacity:.58}.hero::after{background:rgba(248,250,255,.34)}
  .hero-inner{padding-top:120px}.hero h1{font-size:68px}
  .feature-grid{gap:14px}.download-layout,.privacy-layout,.faq-layout{grid-template-columns:1fr;gap:52px}.faq-heading{position:static}.legal-layout{gap:48px}
  .model-intro{grid-template-columns:1fr;gap:30px}.flow-diagram{overflow:hidden}.model-capabilities{grid-template-columns:1fr 1fr}
}

@media (max-width:760px){
  .section-shell,.section-shell.wide{width:calc(100% - 32px)}
  .site-header{height:64px}.nav-shell{width:calc(100% - 28px)}.brand img{width:40px;height:40px}.brand{font-size:19px}
  .menu-button{display:flex}.site-nav{position:fixed;top:64px;right:0;left:0;display:none;align-items:stretch;flex-direction:column;gap:0;padding:10px 16px 22px;border-bottom:1px solid var(--line);background:#fff;box-shadow:0 18px 38px rgba(26,49,99,.12)}.site-nav.open{display:flex}.site-nav a{padding:14px 6px}.nav-download{text-align:center}
  .hero{height:auto;min-height:760px;padding-top:64px}.app-showcase{top:82px;right:52px;width:370px;height:330px;transform:scale(.58);transform-origin:top right;opacity:.86}.hero::after{background:rgba(248,250,255,.22)}
  .hero-inner{width:calc(100% - 32px);padding-top:322px}.hero h1{font-size:52px}.hero h1 small{display:inline-block;margin:0;font-size:1em;vertical-align:0}.hero-motto{margin-top:14px;font-size:16px}.hero-lead{margin-top:8px;font-size:16px;line-height:1.65}.hero-download{gap:14px;margin-top:20px}.hero-download img{width:104px;height:104px}.button{width:100%}.release-meta{flex-wrap:wrap;row-gap:8px;margin-top:18px}
  .feature-band,.workflow-band,.model-band,.privacy-band,.faq-band{padding:74px 0}.section-heading{margin-bottom:34px}.section-heading h2,.download-band h2,.legal-band h2{font-size:34px}.section-heading>p:last-child{font-size:15px}
  .feature-grid{grid-template-columns:1fr;gap:18px}.feature-item{width:min(100%,360px);margin:0 auto}
  .workflow-list{grid-template-columns:1fr}.workflow-list li,.workflow-list li+li{min-height:0;padding:24px 0;border-right:0;border-bottom:1px solid #ccdfd2}.workflow-list h3{margin:12px 0 8px}.workflow-list li:last-child{border:0}
  .model-copy{padding-top:18px}.flow-diagram{padding:22px 18px}.flow-track,.result-track{display:flex;width:100%;flex-direction:column;gap:10px}.flow-node{width:100%;min-height:0}.flow-arrow{transform:rotate(90deg)}.flow-loop{transform:rotate(90deg)}.flow-return{margin:18px 0}.model-capabilities{grid-template-columns:1fr}
  .download-band{padding:72px 0}.download-layout{gap:44px}.release-table>div{grid-template-columns:96px 1fr}.checksum-row{padding-bottom:54px!important}.copy-button{right:auto;bottom:10px;left:116px}
  .privacy-points{grid-template-columns:1fr}.privacy-points article{min-height:0}
  .faq-list summary{font-size:16px}.legal-band{padding:60px 0}.legal-layout{grid-template-columns:1fr;gap:26px}
  .footer-layout{grid-template-columns:1fr}.site-footer nav{justify-content:flex-start}.site-footer>div>p{margin-top:0}
}

@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.button,.toast,.faq-list summary span,.carousel-card{transition:none}}