:root{
  --graphite:#11151a;
  --graphite2:#1a2027;
  --graphite3:#252c34;
  --blue:#2f89ff;
  --blue2:#75b4ff;
  --ice:#eaf1f7;
  --paper:#f8fafc;
  --white:#fff;
  --ink:#17202a;
  --muted:#687581;
  --line:#d7e0e7;
  --red:#ef5a5a;
  --green:#55b88b;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:Arial,"Microsoft YaHei","PingFang SC","Helvetica Neue",sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased
}
img{display:block;max-width:100%;height:auto}
a{color:inherit}
.shell{width:min(1220px,calc(100% - 40px));margin-inline:auto}
.skip-link{position:fixed;left:14px;top:-70px;z-index:999;background:#fff;padding:10px 14px;text-decoration:none}
.skip-link:focus{top:14px}

.command-bar{
  position:sticky;top:0;z-index:80;
  background:rgba(17,21,26,.98);
  border-bottom:1px solid rgba(255,255,255,.08);
  backdrop-filter:blur(16px)
}
.command-inner{
  min-height:72px;
  display:grid;
  grid-template-columns:180px 230px 1fr auto;
  align-items:center;
  gap:24px
}
.brand{
  display:inline-flex;align-items:center;
  padding:7px 10px;background:#090c10;border:1px solid rgba(255,255,255,.1);
  border-radius:6px;text-decoration:none
}
.brand img{height:34px;width:auto;max-width:165px;object-fit:contain}
.command-status{display:flex;align-items:center;gap:9px;color:#8fa0af;font-size:9px;letter-spacing:.12em}
.command-status b{padding:3px 7px;border:1px solid #39434d;color:#b7c4ce}
.status-light{width:7px;height:7px;border-radius:50%;background:var(--green);box-shadow:0 0 0 5px rgba(85,184,139,.08)}
.command-nav{display:flex;justify-content:center;gap:24px}
.command-nav a{color:#c5ced6;text-decoration:none;font-size:13px}
.command-download{
  min-height:42px;display:inline-flex;align-items:center;justify-content:center;
  padding:8px 18px;background:var(--blue);color:#fff;text-decoration:none;font-weight:900;border-radius:5px
}

.hero{
  background:
    linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px),
    linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),
    var(--graphite);
  background-size:74px 74px;
  color:#fff
}
.hero-shell{padding:70px 0 80px}
.hero-head{
  display:grid;grid-template-columns:100px 1fr 330px;gap:34px;align-items:end;
  margin-bottom:42px
}
.hero-number{
  font-size:80px;line-height:.8;font-weight:900;color:#313a44;letter-spacing:-.08em
}
.eyebrow{margin:0 0 10px;color:#75b4ff;font-size:10px;font-weight:900;letter-spacing:.16em}
.eyebrow.blue{color:#397bc4}.eyebrow.red{color:#ff8585}
.hero h1{
  margin:0;font-size:clamp(48px,5.7vw,78px);line-height:.98;letter-spacing:-.055em
}
.hero h1 span{display:inline-block;margin-top:9px;color:var(--blue2)}
.hero-lead{max-width:720px;margin:24px 0 0;color:#b9c5cf;font-size:17px}
.hero-action-panel{
  border:1px solid #333d47;background:#171c22;padding:22px
}
.hero-action-panel>span{display:block;color:#6f8291;font-size:9px;font-weight:900;letter-spacing:.13em}
.hero-action-panel strong{display:block;margin-top:4px;font-size:24px}
.hero-action-panel p{margin:4px 0 18px;color:#8d9ba7;font-size:12px}
.hero-action-panel a{
  min-height:58px;display:flex;align-items:center;justify-content:space-between;
  padding:12px 16px;background:var(--blue);color:#fff;text-decoration:none;font-weight:900
}
.hero-action-panel a b{font-size:24px}

.desktop-stage{
  border:1px solid #343f49;background:#181e24;
  box-shadow:0 38px 90px rgba(0,0,0,.32)
}
.window-bar{
  min-height:48px;display:grid;grid-template-columns:100px 1fr auto;gap:20px;align-items:center;
  padding:0 16px;border-bottom:1px solid #303a43;color:#8394a2;font-size:9px;font-weight:900;letter-spacing:.12em
}
.window-dots{display:flex;gap:7px}
.window-dots i{width:9px;height:9px;border-radius:50%;background:#39434c}
.window-dots i:first-child{background:var(--red)}
.window-dots i:nth-child(2){background:#f2c65b}
.window-dots i:nth-child(3){background:var(--green)}
.window-screen{
  min-height:470px;display:flex;align-items:center;justify-content:center;padding:28px;background:#0c1014
}
.window-screen img{max-height:445px;max-width:95%;width:auto;object-fit:contain}
.window-meta{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid #303a43}
.window-meta>div{padding:14px 16px;border-right:1px solid #303a43}
.window-meta>div:last-child{border-right:0}
.window-meta span,.window-meta strong{display:block}
.window-meta span{color:#687985;font-size:8px;font-weight:900;letter-spacing:.1em}
.window-meta strong{margin-top:3px;font-size:12px;color:#c9d3da}

.download-console{padding:42px 0;background:var(--blue)}
.console-grid{display:grid;grid-template-columns:190px 1fr;gap:35px}
.console-label{display:flex;align-items:flex-start;gap:14px;color:#fff}
.console-label span{font-size:32px;font-weight:900;opacity:.32}
.console-label strong{font-size:10px;letter-spacing:.13em;padding-top:8px}
.console-steps{display:grid;grid-template-columns:repeat(4,1fr)}
.console-steps article{padding:0 20px;border-left:1px solid rgba(255,255,255,.28)}
.console-steps span{display:block;color:#cfe4ff;font-size:10px;font-weight:900}
.console-steps h2{margin:14px 0 0;font-size:18px}
.console-steps p{margin:5px 0 0;color:#dbeaff;font-size:12px}

.file-section{padding:100px 0;background:#fff}
.file-title{display:grid;grid-template-columns:1fr .9fr;column-gap:70px;margin-bottom:38px}
.file-title .eyebrow{grid-column:1}
.file-title h2,.check-heading h2,.retry-left h2,.cases-title h2,.related-title h2,.faq-head h2,.final-inner h2{
  margin:0;font-size:clamp(31px,3.3vw,46px);line-height:1.15;letter-spacing:-.04em
}
.file-title>p:last-child{margin:0;color:var(--muted);align-self:end}
.file-workspace{display:grid;grid-template-columns:1.1fr .9fr;gap:28px}
.file-image{
  margin:0;padding:18px;background:var(--ice);border:1px solid var(--line)
}
.figure-top{display:flex;align-items:center;justify-content:space-between;padding:0 2px 12px;color:#718493}
.figure-top span{color:var(--blue);font-weight:900}.figure-top strong{font-size:9px;letter-spacing:.13em}
.file-image img{max-height:460px;width:auto;margin:0 auto;object-fit:contain}
.file-image figcaption{padding-top:12px;text-align:center;color:#687984;font-size:12px}
.file-list{border-top:2px solid var(--graphite)}
.file-list article{
  display:grid;grid-template-columns:100px 1fr;gap:20px;padding:20px 0;border-bottom:1px solid var(--line)
}
.file-list article>span{color:#4b7faa;font-size:9px;font-weight:900;letter-spacing:.11em}
.file-list h3{margin:0;font-size:18px}
.file-list p{margin:4px 0 0;color:var(--muted)}
.file-download{display:inline-block;margin-top:25px;color:var(--blue);text-decoration:none;font-weight:900}

.check-section{padding:92px 0;background:var(--ice)}
.check-heading{display:grid;grid-template-columns:180px 1fr;gap:28px;margin-bottom:30px}
.check-heading>span{color:#527999;font-size:10px;font-weight:900;letter-spacing:.14em}
.check-ledger{border:1px solid #cbd7e0;background:#f8fbfd}
.ledger-row{
  min-height:72px;display:grid;grid-template-columns:90px 150px 1fr 90px;
  gap:20px;align-items:center;padding:0 20px;border-bottom:1px solid #d6e0e7
}
.ledger-row:last-child{border-bottom:0}
.ledger-head{min-height:42px;background:#dce8f0;color:#697f90;font-size:9px;font-weight:900;letter-spacing:.1em}
.ledger-row>span:first-child{color:var(--blue);font-size:11px;font-weight:900}
.ledger-row p{color:var(--muted)}
.ledger-row b{font-size:9px;color:#3c8c69;letter-spacing:.08em}
.check-download{
  display:inline-flex;min-height:50px;align-items:center;justify-content:center;
  margin-top:25px;padding:11px 22px;background:var(--graphite);color:#fff;text-decoration:none;font-weight:900
}

.retry-section{padding:100px 0;background:var(--graphite2);color:#fff}
.retry-shell{display:grid;grid-template-columns:.72fr 1.28fr;gap:72px;align-items:start}
.retry-left{position:sticky;top:105px}
.retry-index{display:block;margin-bottom:18px;color:#3a4652;font-size:70px;line-height:1;font-weight:900}
.retry-left>p:not(.eyebrow){color:#b8c2ca}
.retry-download{
  display:inline-flex;min-height:50px;align-items:center;justify-content:center;
  margin-top:24px;padding:11px 22px;background:var(--red);color:#fff;text-decoration:none;font-weight:900
}
.retry-right{display:grid;grid-template-columns:1.1fr .9fr;gap:22px;align-items:center}
.update-visual{margin:0;padding:16px;background:#101419;border:1px solid #323c45}
.update-bar{display:flex;justify-content:space-between;padding:0 2px 12px;color:#7b8b97;font-size:9px;font-weight:900;letter-spacing:.11em}
.update-visual img{max-height:420px;width:auto;margin:0 auto;object-fit:contain}
.retry-notes{border-top:1px solid #39434c}
.retry-notes>div{padding:20px 0;border-bottom:1px solid #39434c}
.retry-notes span{display:block;color:var(--red);font-size:10px;font-weight:900}
.retry-notes strong{display:block;margin-top:4px}
.retry-notes p{margin:4px 0 0;color:#aebbc4;font-size:13px}

.download-cases{padding:94px 0;background:#f7f9fb}
.cases-title{display:grid;grid-template-columns:170px 1fr;gap:28px;margin-bottom:30px}
.cases-title>span,.related-title>span,.faq-head>span{
  color:#4d7da4;font-size:10px;font-weight:900;letter-spacing:.14em
}
.cases-grid{display:grid;grid-template-columns:repeat(4,1fr);border-top:2px solid var(--graphite);border-left:1px solid var(--line)}
.cases-grid article{min-height:260px;padding:26px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);background:#fff}
.cases-grid>article>span{display:block;margin-bottom:34px;color:var(--blue);font-size:11px;font-weight:900}
.cases-grid h3{margin:0;font-size:20px}
.cases-grid p{color:var(--muted);font-size:14px}
.cases-grid a{display:inline-block;margin-top:18px;color:var(--blue);text-decoration:none;font-weight:900}

.related-section{padding:86px 0;background:#fff}
.related-shell{display:grid;grid-template-columns:.6fr 1.4fr;gap:70px}
.related-title{display:grid;grid-template-columns:1fr;gap:8px}
.related-links{border-top:1px solid var(--line)}
.related-links a{
  min-height:86px;display:grid;grid-template-columns:120px 1fr 25px;gap:20px;align-items:center;
  border-bottom:1px solid var(--line);text-decoration:none
}
.related-links small{color:#5481a5;font-size:9px;font-weight:900;letter-spacing:.11em}
.related-links strong{font-size:18px}
.related-links b{color:var(--blue);font-size:20px}

.faq-section{padding:96px 0;background:var(--ice)}
.faq-shell{display:grid;grid-template-columns:.62fr 1.38fr;gap:72px}
.faq-head>p{color:var(--muted)}
.faq-list{border-top:1px solid #ccd8e1}
.faq-list details{border-bottom:1px solid #ccd8e1}
.faq-list summary{cursor:pointer;list-style:none;padding:21px 3px;font-size:18px;font-weight:900}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{content:"+";float:right;color:var(--blue)}
.faq-list details[open] summary::after{content:"−"}
.faq-list p{margin:-2px 0 24px;padding-right:45px;color:var(--muted)}

.final-download{padding:62px 0;background:var(--blue);color:#fff}
.final-inner{display:grid;grid-template-columns:110px 1fr auto;gap:30px;align-items:center}
.final-code{font-size:10px;font-weight:900;letter-spacing:.14em}
.final-inner p{margin:6px 0 0;color:#dbeaff}
.final-inner>a{
  min-width:210px;min-height:54px;display:inline-flex;align-items:center;justify-content:center;
  padding:11px 22px;background:var(--graphite);color:#fff;text-decoration:none;font-weight:900
}

.footer{padding:54px 0 92px;background:#080b0e;color:#d9e0e5}
.footer-inner{display:grid;grid-template-columns:1fr auto;gap:40px}
.footer-brand img{height:32px;width:auto;max-width:160px;object-fit:contain;padding:6px 8px;background:#030506;border:1px solid rgba(255,255,255,.1)}
.footer-brand p{color:#83909a;font-size:13px}
.footer-links{display:flex;gap:20px;flex-wrap:wrap}
.footer-links a{color:#d9e0e5;text-decoration:none;font-size:14px}
.mobile-download-bar{display:none}

@media(max-width:1080px){
  .command-inner{grid-template-columns:170px 1fr auto}
  .command-status{display:none}
  .hero-head{grid-template-columns:80px 1fr}
  .hero-action-panel{grid-column:2}
  .retry-shell{grid-template-columns:1fr}
  .retry-left{position:static}
}
@media(max-width:840px){
  .command-inner{grid-template-columns:1fr auto}
  .command-nav{display:none}
  .hero-head{grid-template-columns:1fr}
  .hero-number{font-size:60px}
  .hero-action-panel{grid-column:auto}
  .window-screen{min-height:370px}
  .console-grid,.file-title,.file-workspace,.check-heading,.related-shell,.faq-shell{grid-template-columns:1fr}
  .console-steps{grid-template-columns:1fr 1fr}
  .console-steps article{padding:15px 18px;border-left:1px solid rgba(255,255,255,.28);border-bottom:1px solid rgba(255,255,255,.18)}
  .file-title .eyebrow{grid-column:auto}
  .retry-right{grid-template-columns:1fr}
  .cases-title{grid-template-columns:1fr}
  .cases-grid{grid-template-columns:1fr 1fr}
  .final-inner{grid-template-columns:1fr}
  .final-inner>a{width:100%}
}
@media(max-width:600px){
  body{font-size:15px;padding-bottom:62px}
  .shell{width:min(100% - 28px,1220px)}
  .command-inner{min-height:64px}
  .brand{padding:6px 8px}
  .brand img{height:28px;max-width:145px}
  .command-download{padding:8px 12px;font-size:12px}
  .hero-shell{padding:52px 0 58px}
  .hero h1{font-size:clamp(41px,13vw,58px)}
  .hero-lead{font-size:16px}
  .desktop-stage{margin-top:10px}
  .window-bar{grid-template-columns:65px 1fr}
  .window-bar>b{display:none}
  .window-screen{min-height:270px;padding:16px}
  .window-screen img{max-height:250px}
  .window-meta{grid-template-columns:1fr 1fr}
  .window-meta>div:nth-child(2){border-right:0}
  .window-meta>div:nth-child(-n+2){border-bottom:1px solid #303a43}
  .download-console{padding:38px 0}
  .console-steps{grid-template-columns:1fr}
  .file-section,.check-section,.retry-section,.download-cases,.related-section,.faq-section{padding:64px 0}
  .file-image img,.update-visual img{max-height:300px}
  .file-list article{grid-template-columns:1fr;gap:4px}
  .ledger-head{display:none}
  .ledger-row{
    grid-template-columns:36px 80px 1fr;
    gap:10px;padding:14px;min-height:auto
  }
  .ledger-row b{grid-column:3}
  .retry-right{grid-template-columns:1fr}
  .cases-grid{grid-template-columns:1fr}
  .cases-grid article{min-height:auto}
  .related-links a{grid-template-columns:82px 1fr 20px}
  .faq-list p{padding-right:8px}
  .footer-inner{grid-template-columns:1fr}
  .footer-links{display:grid;grid-template-columns:1fr 1fr}
  .mobile-download-bar{
    position:fixed;left:0;right:0;bottom:0;z-index:100;height:60px;
    display:grid;grid-template-columns:1fr auto;gap:10px;align-items:center;
    padding:8px 14px;background:rgba(17,21,26,.98);color:#fff;border-top:1px solid rgba(255,255,255,.1)
  }
  .mobile-download-bar a{
    min-height:42px;display:inline-flex;align-items:center;justify-content:center;
    padding:8px 15px;background:var(--blue);color:#fff;text-decoration:none;font-weight:900
  }
}