:root{
  --ink:#211f1d;
  --ink2:#37322e;
  --red:#df202c;
  --red2:#b6121c;
  --bronze:#9a6c45;
  --bronze2:#755036;
  --paper:#fff;
  --cream:#f4efe7;
  --mist:#f5f5f4;
  --line:#ddd9d5;
  --muted:#706b66;
  --shell:1400px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:82px}
body{
  margin:0;min-width:320px;color:var(--ink);background:var(--paper);
  font-family:Arial,"Microsoft YaHei","PingFang SC","Segoe UI",sans-serif;
  line-height:1.75;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,a{-webkit-tap-highlight-color:transparent}
button{font:inherit}
.skip-link{position:fixed;top:-90px;left:18px;z-index:1000;padding:10px 15px;color:#fff;background:var(--red);font-weight:900}
.skip-link:focus{top:18px}
.header-shell,.hero-copy,.hero-visual,.hero-download-row,.section,.final-shell,.footer-shell{width:min(calc(100% - 56px),var(--shell));margin-inline:auto}

.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);backdrop-filter:blur(15px)}
.header-shell{min-height:76px;display:grid;grid-template-columns:255px 1fr 135px;gap:30px;align-items:center}
.brand{width:max-content;display:flex;align-items:center;gap:12px}
.brand-box{padding:6px 12px;background:var(--ink);border-bottom:3px solid var(--red)}
.brand-box img{width:auto;height:29px;object-fit:contain}
.brand-caption{color:#918b86;font-size:8px;font-weight:900;letter-spacing:.13em}
.site-nav{display:flex;justify-content:center;gap:28px;color:#6e6964;font-size:12px;font-weight:800}
.site-nav a{padding:24px 0 22px}
.site-nav a:hover,.site-nav a:focus-visible{color:var(--red)}
.header-cta{justify-self:end;padding:10px 14px;color:#fff;background:var(--red);font-size:12px;font-weight:900}
.header-cta:hover,.header-cta:focus-visible{background:var(--red2)}
.menu-button{display:none;width:44px;height:44px;background:#fff;border:1px solid var(--line)}
.menu-button span{display:block;width:19px;height:2px;margin:4px auto;background:var(--ink)}

.hero{overflow:hidden;background:#fff;border-bottom:1px solid var(--line)}
.hero-copy{padding:82px 0 45px}
.hero-topline{display:flex;align-items:center;gap:17px}
.hero-topline span{color:var(--red);font-size:42px;font-weight:950;line-height:1}
.hero-topline p{margin:0;color:var(--bronze2);font-size:9px;font-weight:900;letter-spacing:.15em}
.hero h1{margin:22px 0 0;max-width:1040px;font-size:clamp(60px,8.3vw,118px);line-height:.93;letter-spacing:-.075em}
.hero-content-row{display:grid;grid-template-columns:1fr auto;gap:70px;align-items:end;margin-top:30px}
.hero-lead{max-width:820px;margin:0;color:#5d5853;font-size:18px;line-height:1.9}
.hero-actions{display:grid;gap:13px;min-width:315px}
.primary-button{min-height:60px;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:14px 20px;color:#fff;background:var(--red);font-weight:900}
.primary-button:hover,.primary-button:focus-visible{background:var(--red2)}
.primary-button b{font-size:21px}
.secondary-link{justify-self:start;padding-bottom:3px;border-bottom:1px solid currentColor;font-size:12px;font-weight:850}
.hero-visual{margin-top:0}
.hero-visual img{width:100%;max-height:480px;object-fit:cover}
.hero-visual figcaption{margin-top:10px;color:var(--muted);font-size:10px}
.hero-download-row{display:grid;grid-template-columns:1fr 1fr 1fr 220px;margin-top:28px;border-top:2px solid var(--ink);border-left:1px solid var(--line)}
.hero-download-row > div{min-height:115px;padding:20px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.hero-download-row span{color:var(--red);font-size:9px;font-weight:900}
.hero-download-row strong{display:block;margin-top:8px;font-size:14px}
.hero-download-row p{margin:4px 0 0;color:var(--muted);font-size:10px}
.hero-download-row > a{min-height:115px;display:grid;place-items:center;padding:20px;color:#fff;background:var(--ink);font-size:12px;font-weight:900}
.hero-download-row > a:hover,.hero-download-row > a:focus-visible{background:var(--red)}

.section{padding-top:106px;padding-bottom:106px}
.section-head{display:grid;grid-template-columns:78px 1fr;gap:30px;max-width:1070px}
.section-index{color:var(--bronze);font-size:56px;font-weight:950;line-height:1}
.section-label{margin:0 0 14px;color:var(--bronze2);font-size:10px;font-weight:900;letter-spacing:.16em;text-transform:uppercase}
.section-head h2,.packages-heading h2,.visual-break-copy h2,.download-check-layout h2,.install-layout h2,.download-again-layout h2,.final-copy h2{
  margin:0;font-size:clamp(34px,4.3vw,54px);line-height:1.16;letter-spacing:-.045em
}
.section-head > div > p:not(.section-label),.packages-heading > p:not(.section-label),.visual-break-copy > p:not(.section-label),.download-check-layout > div > p:not(.section-label),.install-layout > div > p:not(.section-label),.download-again-layout > div:nth-child(2) > p:not(.section-label){
  margin:20px 0 0;color:var(--muted)
}

.download-section{background:var(--cream)}
.download-main{display:grid;grid-template-columns:1.1fr .8fr 260px;margin-top:50px;border-top:4px solid var(--red);background:#fff}
.download-main-copy{padding:32px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.download-main-copy > span{color:var(--bronze2);font-size:9px;font-weight:900;letter-spacing:.12em}
.download-main-copy h3{margin:46px 0 10px;font-size:27px}
.download-main-copy p{margin:0;color:var(--muted)}
.download-main-meta{display:grid;border-bottom:1px solid var(--line)}
.download-main-meta div{display:grid;align-content:center;padding:25px;border-bottom:1px solid var(--line)}
.download-main-meta div:last-child{border-bottom:0}
.download-main-meta small{color:#98918b;font-size:8px;font-weight:900}
.download-main-meta strong{margin-top:5px;font-size:12px}
.download-main-button{display:flex;align-items:center;justify-content:space-between;gap:15px;padding:25px;color:#fff;background:var(--ink);font-weight:900}
.download-main-button:hover,.download-main-button:focus-visible{background:var(--red)}
.download-main-button b{font-size:21px}

.packages-section{background:#fff}
.packages-heading{max-width:980px}
.packages-heading .section-index,.visual-break-copy .section-index,.download-check-layout .section-index,.install-layout .section-index{display:block;margin-bottom:12px}
.package-switch{display:grid;grid-template-columns:.72fr 1.28fr;margin-top:50px;border-top:2px solid var(--ink)}
.package-tabs{border-right:1px solid var(--line)}
.package-tab{width:100%;min-height:100px;display:grid;grid-template-columns:45px 1fr;grid-template-rows:auto auto;gap:2px 14px;align-content:center;padding:18px 22px;color:var(--ink);background:#fff;border:0;border-bottom:1px solid var(--line);text-align:left;cursor:pointer}
.package-tab span{grid-row:1/3;color:#aca49c;font-size:10px;font-weight:900}
.package-tab strong{font-size:18px}
.package-tab small{color:#908983;font-size:9px}
.package-tab.is-active{color:#fff;background:var(--ink)}
.package-tab.is-active span,.package-tab.is-active small{color:#92908e}
.package-result{padding:38px;background:var(--mist);border-bottom:1px solid var(--line)}
.package-result > span{color:var(--red);font-size:9px;font-weight:900;letter-spacing:.12em}
.package-result h3{margin:8px 0 10px;font-size:30px}
.package-result > p{margin:0;color:var(--muted)}
.package-result dl{display:grid;grid-template-columns:repeat(3,1fr);margin:28px 0 0;border-top:1px solid var(--line);border-left:1px solid var(--line)}
.package-result dl div{padding:12px;background:#fff;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.package-result dt{color:#96908a;font-size:8px;font-weight:900}
.package-result dd{margin:4px 0 0;font-size:10px;font-weight:850}
.package-result > a{display:inline-block;margin-top:25px;padding-bottom:3px;color:var(--red);border-bottom:1px solid currentColor;font-size:12px;font-weight:900}

.visual-break{background:var(--mist)}
.visual-break-copy{max-width:950px}
.visual-break figure{margin:48px 0 0}
.visual-break img{width:100%;max-height:430px;object-fit:cover}
.visual-break figcaption{margin-top:10px;color:var(--muted);font-size:10px}

.steps-section{background:#fff}
.download-steps{display:grid;grid-template-columns:repeat(5,1fr);margin:50px 0 0;padding:0;list-style:none;border-top:2px solid var(--ink);border-left:1px solid var(--line)}
.download-steps li{min-height:255px;padding:25px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.download-steps li:nth-child(even){background:var(--cream)}
.download-steps li > span{color:var(--red);font-size:28px;font-weight:950}
.download-steps h3{margin:48px 0 8px;font-size:18px}
.download-steps p{margin:0;color:var(--muted);font-size:12px}
.steps-cta{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:24px;padding:18px 22px;color:#fff;background:var(--ink)}
.steps-cta span{font-size:11px}
.steps-cta a{font-weight:900}

.download-check-section{background:var(--cream)}
.download-check-layout{display:grid;grid-template-columns:.86fr 1.14fr;gap:75px;align-items:center}
.check-list{margin-top:30px;border-top:2px solid var(--ink)}
.check-list article{display:grid;grid-template-columns:85px 1fr;gap:18px;padding:13px 0;border-bottom:1px solid #d5ccbf}
.check-list b{color:var(--bronze2);font-size:9px}
.check-list span{color:#5b5651;font-size:12px}
.download-check-layout figure{margin:0}
.download-check-layout figure img{width:100%;max-height:450px;object-fit:contain}
.download-check-layout figcaption{margin-top:11px;color:var(--muted);font-size:10px;text-align:center}

.install-section{background:var(--ink);color:#fff}
.install-layout{display:grid;grid-template-columns:1.12fr .88fr;gap:75px;align-items:center}
.install-layout figure{margin:0}
.install-layout figure img{width:100%;max-height:450px;object-fit:contain}
.install-layout h2{color:#fff}
.install-layout > div > p:not(.section-label){color:#bcb7b2}
.install-layout .section-label{color:#d4ac87}
.install-layout .section-index{color:#d4ac87}
.install-layout ul{margin:28px 0 0;padding:0;list-style:none;border-top:1px solid #4a4642}
.install-layout li{padding:11px 0;border-bottom:1px solid #4a4642;color:#d7d3cf;font-size:12px}
.text-cta{display:inline-block;margin-top:25px;padding-bottom:3px;color:#ff8a91;border-bottom:1px solid currentColor;font-size:12px;font-weight:900}

.failed-section{background:#fff}
.failed-grid{display:grid;grid-template-columns:repeat(3,1fr);margin-top:48px;border-top:1px solid var(--line);border-left:1px solid var(--line)}
.failed-grid article{min-height:190px;padding:23px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.failed-grid article:nth-child(even){background:var(--mist)}
.failed-grid span{color:var(--red);font-size:9px;font-weight:900}
.failed-grid h3{margin:26px 0 8px;font-size:18px}
.failed-grid p{margin:0;color:var(--muted);font-size:12px}

.download-again-section{background:var(--cream)}
.download-again-layout{display:grid;grid-template-columns:120px 1fr 285px;gap:42px;align-items:center}
.download-big-number{font-size:95px;font-weight:950;line-height:1;color:var(--red)}
.download-again-button{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:17px 21px;color:#fff;background:var(--red);font-weight:900}
.download-again-button:hover,.download-again-button:focus-visible{background:var(--red2)}
.download-again-button b{font-size:21px}

.faq-section{background:#fff}
.faq-list{margin-top:50px;border-top:2px solid var(--ink)}
.faq-list details{border-bottom:1px solid var(--line)}
.faq-list summary{position:relative;padding:24px 55px 24px 0;font-size:16px;font-weight:850;cursor:pointer;list-style:none}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary span{position:absolute;right:4px;top:20px;width:30px;height:30px;display:grid;place-items:center;color:var(--red);border:1px solid var(--line);border-radius:50%;transition:transform .2s ease}
.faq-list details[open] summary span{transform:rotate(45deg)}
.faq-list p{margin:-2px 0 23px;color:var(--muted)}

.related-section{background:var(--mist)}
.related-links{display:grid;grid-template-columns:repeat(3,1fr);margin-top:50px;border-top:1px solid var(--line);border-left:1px solid var(--line)}
.related-links a{min-height:140px;display:grid;align-content:center;padding:23px;background:#fff;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.related-links a:hover,.related-links a:focus-visible{background:var(--cream)}
.related-links strong{color:var(--bronze2);font-size:15px}
.related-links span{margin-top:6px;color:var(--muted);font-size:11px}

.final-section{background:#fff}
.final-shell{min-height:285px;display:grid;grid-template-columns:110px 1fr 245px;gap:42px;align-items:center;padding:44px 0;border-top:5px solid var(--red);border-bottom:1px solid var(--line)}
.final-index{width:90px;height:110px;display:grid;place-items:center;align-content:center;color:#fff;background:var(--ink)}
.final-index span{font-size:40px;font-weight:950;line-height:1}
.final-index small{margin-top:5px;color:#dfb18a;font-size:8px;font-weight:900}
.final-copy p{margin:0 0 9px;color:var(--bronze2);font-size:9px;font-weight:900;letter-spacing:.13em}
.final-copy h2{font-size:clamp(29px,3.6vw,44px)}
.final-copy span{display:block;margin-top:13px;color:var(--muted);font-size:11px}
.final-button{min-height:70px;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:16px 20px;color:#fff;background:var(--red);font-weight:900}
.final-button:hover,.final-button:focus-visible{background:var(--red2)}
.final-button b{font-size:20px}

.site-footer{padding:52px 0 32px;color:#beb9b4;background:var(--ink)}
.footer-shell{display:grid;grid-template-columns:1fr auto;gap:32px 55px}
.footer-brand img{width:auto;height:34px;object-fit:contain}
.footer-brand p{max-width:820px;margin:17px 0 0;color:#7d7771;font-size:11px}
.footer-nav{display:grid;grid-template-columns:repeat(2,auto);gap:8px 25px;font-size:12px;font-weight:700}
.footer-nav a:hover,.footer-nav a:focus-visible{color:#fff}
.copyright{grid-column:1/-1;margin:5px 0 0;padding-top:21px;color:#59534e;border-top:1px solid #413d39;font-size:11px}
.mobile-sticky{display:none}

@media(max-width:1080px){
  .header-shell{grid-template-columns:230px 1fr 125px}
  .site-nav{gap:16px}
  .download-steps{grid-template-columns:repeat(3,1fr)}
}
@media(max-width:820px){
  html{scroll-padding-top:72px}
  .header-shell{min-height:70px;grid-template-columns:1fr auto}
  .header-cta{display:none}
  .menu-button{display:block}
  .site-nav{position:absolute;left:20px;right:20px;top:calc(100% + 8px);display:none;padding:10px;background:#fff;border:1px solid var(--line);box-shadow:0 22px 55px rgba(0,0,0,.18)}
  .site-nav.is-open{display:grid}
  .site-nav a{padding:10px 12px}
  .hero-content-row{grid-template-columns:1fr}
  .hero-actions{min-width:0;max-width:380px}
  .hero-download-row{grid-template-columns:repeat(2,1fr)}
  .download-main{grid-template-columns:1fr 1fr}
  .download-main-button{grid-column:1/-1;min-height:72px}
  .package-switch{grid-template-columns:1fr}
  .package-tabs{display:grid;grid-template-columns:repeat(2,1fr);border-right:0}
  .download-check-layout,.install-layout{grid-template-columns:1fr}
  .download-again-layout{grid-template-columns:100px 1fr}
  .download-again-button{grid-column:2;width:285px}
  .failed-grid{grid-template-columns:repeat(2,1fr)}
  .final-shell{grid-template-columns:100px 1fr}
  .final-button{grid-column:2;width:245px}
  .footer-shell{grid-template-columns:1fr}
  .copyright{grid-column:auto}
}
@media(max-width:600px){
  body{padding-bottom:70px}
  .header-shell,.hero-copy,.hero-visual,.hero-download-row,.section,.final-shell,.footer-shell{width:min(calc(100% - 28px),var(--shell))}
  .brand-caption{display:none}
  .brand-box img{height:27px}
  .hero-copy{padding:55px 0 36px}
  .hero h1{font-size:clamp(48px,14.5vw,68px)}
  .hero-content-row{gap:24px}
  .hero-lead{font-size:16px}
  .hero-actions{width:100%}
  .primary-button{width:100%}
  .hero-visual img{object-fit:contain}
  .hero-download-row{grid-template-columns:1fr}
  .hero-download-row > a{min-height:68px}
  .section{padding-top:72px;padding-bottom:72px}
  .section-head{grid-template-columns:1fr;gap:10px}
  .section-index{font-size:42px}
  .section-head h2,.packages-heading h2,.visual-break-copy h2,.download-check-layout h2,.install-layout h2,.download-again-layout h2{font-size:clamp(30px,10vw,41px)}
  .download-main,.package-tabs,.package-result dl,.download-steps,.failed-grid,.related-links{grid-template-columns:1fr}
  .download-main-button{grid-column:auto}
  .package-result{padding:24px}
  .visual-break img,.download-check-layout figure img,.install-layout figure img{object-fit:contain}
  .download-steps li{min-height:0}
  .download-steps h3{margin-top:28px}
  .steps-cta{display:grid}
  .failed-grid article{min-height:0}
  .download-again-layout{grid-template-columns:1fr}
  .download-big-number{font-size:70px}
  .download-again-button{grid-column:auto;width:100%}
  .faq-list summary{font-size:15px}
  .final-shell{grid-template-columns:1fr;padding:34px 0}
  .final-index{width:76px;height:90px}
  .final-button{grid-column:auto;width:100%}
  .footer-nav{grid-template-columns:1fr 1fr}
  .mobile-sticky{
    position:fixed;left:0;right:0;bottom:0;z-index:120;min-height:70px;
    display:flex;justify-content:space-between;align-items:center;gap:12px;
    padding:9px 14px;color:#fff;background:rgba(33,31,29,.97);border-top:1px solid #4a4541
  }
  .mobile-sticky>div{display:flex;align-items:center;gap:10px}
  .mobile-sticky img{width:75px;height:auto;object-fit:contain}
  .mobile-sticky small,.mobile-sticky strong{display:block;line-height:1.2}
  .mobile-sticky small{color:#877f78;font-size:9px}
  .mobile-sticky strong{margin-top:3px;font-size:13px}
  .mobile-sticky>a{padding:11px 15px;color:#fff;background:var(--red);font-size:13px;font-weight:900}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:.01ms!important}
}