:root{
  --ink:#17181b;--ink2:#31343a;--red:#df202c;--red2:#b6121c;
  --blue:#5d6f86;--paper:#fff;--soft:#f4f5f7;--warm:#f2eee8;--line:#dcdfe4;--muted:#68707a;
  --shell:1380px;--article:980px
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:78px}
body{margin:0;min-width:320px;color:var(--ink);background:#fff;font-family:Arial,"Microsoft YaHei","PingFang SC",sans-serif;line-height:1.78;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit}
.skip-link{position:fixed;top:-90px;left:16px;z-index:999;padding:10px 14px;background:var(--red);color:#fff;font-weight:900}
.skip-link:focus{top:16px}
.header-shell,.hero-copy,.hero-image,.hero-strip,.image-opening,.section,.redownload-shell,.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(14px)}
.header-shell{min-height:74px;display:grid;grid-template-columns:255px 1fr 132px;gap:28px;align-items:center}
.brand{display:flex;align-items:center;gap:11px;width:max-content}
.brand-logo{padding:6px 11px;background:var(--ink);border-left:4px solid var(--red)}
.brand-logo img,.footer-logo img{width:auto;height:28px;object-fit:contain}
.brand-text{font-size:8px;font-weight:900;letter-spacing:.13em;color:#8b9198}
.site-nav{display:flex;justify-content:center;gap:28px;color:#68707a;font-size:12px;font-weight:800}
.site-nav a{padding:23px 0}.site-nav a:hover{color:var(--red)}
.header-download{justify-self:end;padding:10px 14px;background:var(--red);color:#fff;font-size:12px;font-weight:900}
.menu-button{display:none;width:43px;height:43px;border:1px solid var(--line);background:#fff}
.menu-button span{display:block;width:19px;height:2px;margin:4px auto;background:var(--ink)}

.hero{padding-bottom:40px;background:linear-gradient(180deg,#fff 0 89%,var(--soft) 89% 100%)}
.hero-copy{padding:78px 0 45px;text-align:center}
.eyebrow,.section-kicker{margin:0 0 13px;color:var(--red);font-size:10px;font-weight:900;letter-spacing:.15em;text-transform:uppercase}
.hero h1{margin:0;font-size:clamp(56px,8vw,110px);line-height:.93;letter-spacing:-.075em}
.hero-answer{max-width:930px;margin:29px auto 0;color:#555d66;font-size:18px}
.hero-actions{display:flex;justify-content:center;align-items:center;gap:23px;flex-wrap:wrap;margin-top:32px}
.primary-button{min-height:60px;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:14px 20px;background:var(--red);color:#fff;font-weight:900}
.primary-button:hover{background:var(--red2)}
.primary-button b{font-size:20px}
.text-link{padding-bottom:3px;border-bottom:1px solid currentColor;font-size:13px;font-weight:850}
.hero-image img{width:100%;max-height:500px;object-fit:contain;background:var(--soft)}
.hero-image figcaption,.wide-image figcaption{margin-top:9px;color:var(--muted);font-size:10px}
.hero-strip{display:grid;grid-template-columns:repeat(4,1fr);margin-top:28px;border-top:2px solid var(--ink);border-left:1px solid var(--line)}
.hero-strip>div{padding:18px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);background:#fff}
.hero-strip span{color:var(--red);font-size:9px;font-weight:900}.hero-strip strong{display:block;margin-top:7px;font-size:13px}.hero-strip p{margin:4px 0 0;color:var(--muted);font-size:10px}

.image-opening{padding:82px 0 102px}
.image-opening-copy{max-width:900px}
.image-opening h2,.article-column>h2,.redownload-shell h2,.final-shell h2{margin:0;font-size:clamp(34px,4vw,52px);line-height:1.17;letter-spacing:-.045em}
.image-opening-copy>p:not(.section-kicker){margin:18px 0 0;color:var(--muted)}
.image-trio{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:42px}
.image-trio figure{margin:0;border-top:3px solid var(--ink)}
.image-trio img{width:100%;aspect-ratio:1.15/1;object-fit:contain;background:var(--soft)}
.image-trio figcaption{display:grid;padding-top:14px}.image-trio strong{font-size:14px}.image-trio span{margin-top:4px;color:var(--muted);font-size:10px}

.section{display:grid;grid-template-columns:115px 1fr;gap:35px;padding-top:105px;padding-bottom:105px}
.side-title{border-right:1px solid var(--line)}
.side-title span{display:block;color:var(--blue);font-size:54px;font-weight:950;line-height:1}
.side-title small{display:block;margin-top:13px;color:#959ba2;font-size:8px;font-weight:900;letter-spacing:.12em;writing-mode:vertical-rl}
.article-column{max-width:var(--article)}
.lead{margin:20px 0 0;color:#5d6570;font-size:16px}
.download-section{border-top:1px solid var(--line)}
.download-box{display:grid;grid-template-columns:1fr 1fr 260px;margin-top:34px;border-top:2px solid var(--ink);border-left:1px solid var(--line)}
.download-box>div{padding:20px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.download-box span{color:var(--red);font-size:9px;font-weight:900}.download-box strong{display:block;margin-top:6px;font-size:13px}.download-box p{margin:5px 0 0;color:var(--muted);font-size:10px}
.download-box>a{display:grid;place-items:center;padding:16px;background:var(--ink);color:#fff;text-align:center;font-size:12px;font-weight:900}

.steps-section{background:var(--soft)}
.timeline{display:grid;grid-template-columns:repeat(3,1fr);margin-top:38px;border-top:2px solid var(--ink);border-left:1px solid var(--line)}
.timeline article{min-height:225px;padding:22px;background:#fff;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.timeline span{color:var(--red);font-size:9px;font-weight:900}.timeline h3{margin:45px 0 8px;font-size:18px}.timeline p{margin:0;color:var(--muted);font-size:12px}
.wide-image{margin:44px 0}.wide-image img{width:100%;max-height:470px;object-fit:contain;background:#fff}
.timeline-bottom{margin-top:0}

.iphone-ipad{background:#fff}
.split-story{display:grid;grid-template-columns:1.12fr .88fr;gap:50px;align-items:center;margin-top:45px;padding-top:28px;border-top:1px solid var(--line)}
.split-story.reverse{grid-template-columns:.88fr 1.12fr}.split-story.reverse figure{order:2}
.split-story figure{margin:0}.split-story img{width:100%;max-height:440px;object-fit:contain;background:var(--soft)}
.split-story span{color:var(--red);font-size:8px;font-weight:900}.split-story h3{margin:7px 0 10px;font-size:24px}.split-story p{margin:0;color:var(--muted)}

.redownload-section{background:var(--warm)}
.redownload-shell{display:grid;grid-template-columns:1.08fr .92fr;gap:70px;align-items:center;padding:100px 0}
.redownload-shell figure{margin:0}.redownload-shell img{width:100%;max-height:450px;object-fit:contain;background:#fff}
.redownload-shell>div>p:not(.section-kicker){margin:18px 0 25px;color:var(--muted)}

.faq-section{background:#fff}
.faq-list{margin-top:38px;border-top:2px solid var(--ink)}
.faq-list details{border-bottom:1px solid var(--line)}
.faq-list summary{position:relative;padding:22px 50px 22px 0;cursor:pointer;list-style:none;font-size:15px;font-weight:850}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary span{position:absolute;right:0;top:18px;width:30px;height:30px;display:grid;place-items:center;border:1px solid var(--line);border-radius:50%;color:var(--red)}
.faq-list details[open] summary span{transform:rotate(45deg)}
.faq-list p{margin:-2px 0 22px;color:var(--muted)}

.final-cta{background:var(--ink);color:#fff}
.final-shell{min-height:260px;display:grid;grid-template-columns:1fr 280px;gap:50px;align-items:center;padding:48px 0}
.final-shell>div>span{color:#aab4c0;font-size:9px;font-weight:900;letter-spacing:.12em}
.final-shell h2{margin-top:7px;color:#fff}.final-shell p{margin:12px 0 0;color:#92969c;font-size:11px}
.final-button{min-height:70px;display:grid;place-items:center;padding:16px;background:var(--red);font-weight:900;text-align:center}

.site-footer{padding:48px 0 28px;background:#0e0f11;color:#aaa}
.footer-shell{display:grid;grid-template-columns:1fr auto;gap:30px 50px}
.footer-shell>div>p{max-width:820px;margin:15px 0 0;color:#70747a;font-size:10px}
.footer-nav{display:grid;grid-template-columns:repeat(2,auto);gap:8px 22px;font-size:11px;font-weight:700}
.copyright{grid-column:1/-1;margin:0;padding-top:19px;border-top:1px solid #333;color:#555;font-size:10px}
.mobile-download-bar{display:none}

@media(max-width:820px){
 .header-shell{grid-template-columns:1fr auto}.header-download{display:none}.menu-button{display:block}
 .site-nav{position:absolute;left:18px;right:18px;top:calc(100% + 7px);display:none;padding:10px;background:#fff;border:1px solid var(--line);box-shadow:0 22px 50px rgba(0,0,0,.15)}
 .site-nav.is-open{display:grid}.site-nav a{padding:9px 11px}
 .image-trio{grid-template-columns:1fr 1fr}.image-trio figure:first-child{grid-column:1/-1}
 .split-story,.split-story.reverse{grid-template-columns:1fr}.split-story.reverse figure{order:0}
 .redownload-shell{grid-template-columns:1fr}.final-shell{grid-template-columns:1fr}.footer-shell{grid-template-columns:1fr}.copyright{grid-column:auto}
}
@media(max-width:600px){
 body{padding-bottom:62px}
 .header-shell,.hero-copy,.hero-image,.hero-strip,.image-opening,.section,.redownload-shell,.final-shell,.footer-shell{width:min(calc(100% - 28px),var(--shell))}
 .brand-text{display:none}.brand-logo img{height:26px}.hero-copy{padding:53px 0 35px}.hero h1{font-size:clamp(46px,14vw,65px)}.hero-answer{font-size:16px;text-align:left}
 .hero-actions{display:grid}.primary-button{width:100%}.text-link{justify-self:center}.hero-strip,.image-trio,.download-box,.timeline{grid-template-columns:1fr}
 .image-trio figure:first-child{grid-column:auto}.image-opening{padding:68px 0 75px}
 .section{grid-template-columns:1fr;gap:10px;padding-top:72px;padding-bottom:72px}.side-title{border-right:0;border-bottom:1px solid var(--line);padding-bottom:9px}.side-title span{font-size:38px}.side-title small{display:none}
 .image-opening h2,.article-column>h2,.redownload-shell h2,.final-shell h2{font-size:clamp(30px,10vw,40px)}
 .timeline article{min-height:0}.timeline h3{margin-top:28px}
 .redownload-shell{padding:72px 0}.footer-nav{grid-template-columns:1fr 1fr}
 .mobile-download-bar{position:fixed;left:0;right:0;bottom:0;z-index:120;height:60px;display:flex;align-items:center;justify-content:space-between;padding:7px 14px;background:rgba(23,24,27,.98);color:#fff;border-top:1px solid #41444a}
 .mobile-download-bar small,.mobile-download-bar strong{display:block;line-height:1.15}.mobile-download-bar small{color:#7e858d;font-size:8px}.mobile-download-bar strong{margin-top:3px;font-size:12px}.mobile-download-bar a{padding:9px 15px;background:var(--red);font-size:12px;font-weight:900}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition-duration:.01ms!important}}