:root{--ink:#101b2c;--muted:#607087;--line:#dce8f5;--blue:#1769ff;--cyan:#0dcbd4;--mist:#f3f8ff;--white:#fff;--shadow:0 28px 80px rgba(40,91,160,.14)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);font:16px/1.75 Inter,"PingFang SC","Microsoft YaHei",sans-serif;background:#fff}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.wrap{width:min(1180px,calc(100% - 40px));margin:auto}.topbar{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.9);backdrop-filter:blur(18px);border-bottom:1px solid rgba(220,232,245,.85)}.nav{height:74px;display:flex;align-items:center;gap:28px}.brand{display:flex;align-items:center;gap:11px;font-weight:850;letter-spacing:-.03em}.brand-mark{width:35px;height:35px;border-radius:12px;background:linear-gradient(145deg,var(--blue),var(--cyan));position:relative;box-shadow:0 8px 20px rgba(23,105,255,.25)}.brand-mark:after{content:"";position:absolute;width:16px;height:8px;border:3px solid white;border-top:0;border-radius:0 0 10px 10px;left:8px;top:12px}.navlinks{display:flex;gap:22px;margin-left:auto;font-size:14px;color:#43536a}.nav-cta,.btn{border-radius:999px;padding:11px 19px;background:var(--ink);color:white;font-weight:750}.menu{display:none;margin-left:auto;border:0;background:var(--mist);border-radius:10px;padding:8px 11px}.hero{min-height:690px;background:radial-gradient(circle at 75% 25%,#e6f8ff 0,transparent 32%),linear-gradient(180deg,#fff,#f6faff);overflow:hidden}.hero-grid{display:grid;grid-template-columns:.86fr 1.14fr;align-items:center;min-height:690px}.eyebrow{display:inline-flex;gap:8px;align-items:center;color:var(--blue);font-weight:800;font-size:13px;letter-spacing:.1em;text-transform:uppercase}.eyebrow:before{content:"";width:30px;height:2px;background:var(--cyan)}h1,h2,h3{line-height:1.12;letter-spacing:-.045em;margin:0}h1{font-size:clamp(48px,6.2vw,86px);margin:22px 0}.hero h1 span{display:block;color:var(--blue)}.lead{font-size:19px;color:var(--muted);max-width:690px}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}.btn{background:var(--blue);box-shadow:0 12px 26px rgba(23,105,255,.22)}.btn.ghost{background:white;color:var(--ink);border:1px solid var(--line);box-shadow:none}.hero-art{position:relative;margin-right:-110px}.hero-art img{width:100%;border-radius:44px;box-shadow:var(--shadow)}.trustline{display:flex;gap:24px;flex-wrap:wrap;margin-top:34px;color:#516177;font-size:13px}.trustline b{color:var(--ink)}section{padding:96px 0}.section-head{display:grid;grid-template-columns:.8fr 1.2fr;gap:60px;margin-bottom:48px}.section-head h2{font-size:clamp(34px,4.5vw,58px)}.section-head p{color:var(--muted);margin:0}.device-split{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--line);border-radius:34px;overflow:hidden;box-shadow:var(--shadow)}.device-pane{padding:46px;background:white}.device-pane+ .device-pane{border-left:1px solid var(--line);background:var(--mist)}.device-pane .os{font-size:13px;font-weight:850;color:var(--blue);letter-spacing:.12em}.device-pane h3{font-size:32px;margin:13px 0}.checklist{list-style:none;padding:0;margin:26px 0}.checklist li{padding:12px 0 12px 30px;border-bottom:1px solid var(--line);position:relative}.checklist li:before{content:"✓";position:absolute;left:2px;color:var(--cyan);font-weight:900}.path-section{background:var(--ink);color:white}.path-section .section-head p{color:#aebdd0}.path{display:grid;grid-template-columns:repeat(5,1fr);position:relative}.path:before{content:"";position:absolute;top:23px;left:8%;right:8%;height:1px;background:#435774}.step{position:relative;padding-right:24px}.step i{display:grid;place-items:center;width:46px;height:46px;border-radius:50%;background:var(--blue);font-style:normal;font-weight:850;position:relative}.step h3{margin:24px 0 10px;font-size:20px}.step p{color:#aebdd0;font-size:14px}.timeline{display:grid;grid-template-columns:300px 1fr;gap:70px}.timeline-rail{border-left:2px solid var(--line);padding-left:32px}.event{position:relative;padding:0 0 38px}.event:before{content:"";position:absolute;left:-40px;top:4px;width:14px;height:14px;background:white;border:3px solid var(--blue);border-radius:50%}.event small{color:var(--blue);font-weight:800}.event h3{font-size:23px;margin:8px 0}.event p{color:var(--muted)}.archive-strip{background:var(--mist)}.release-row{display:grid;grid-template-columns:120px 1fr 180px;gap:30px;padding:24px 0;border-bottom:1px solid #cfdef0}.release-row b{font-size:13px;color:var(--blue)}.release-row p{margin:0;color:var(--muted)}.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.story{padding:28px;border:1px solid var(--line);border-radius:24px;background:white;transition:.2s}.story:hover{transform:translateY(-4px);box-shadow:var(--shadow)}.story time{font-size:12px;color:var(--blue)}.story h3{font-size:22px;margin:15px 0}.story p{color:var(--muted);font-size:14px}.more{color:var(--blue);font-weight:800}.faq{max-width:850px;margin:auto}.faq details{border-bottom:1px solid var(--line);padding:19px 0}.faq summary{font-weight:800;cursor:pointer}.faq p{color:var(--muted)}.page-hero{padding:90px 0 48px;background:linear-gradient(135deg,#f3f8ff,#fff)}.page-hero h1{font-size:clamp(40px,5vw,68px);max-width:900px}.page{padding:64px 0}.prose{max-width:800px}.prose h2{font-size:31px;margin:48px 0 16px}.prose h3{font-size:22px;margin:32px 0 10px}.prose p,.prose li{color:#42536a}.notice{padding:24px;border-left:4px solid var(--blue);background:var(--mist);border-radius:0 18px 18px 0}.article-layout{display:grid;grid-template-columns:1fr 250px;gap:70px}.article-meta{color:var(--blue);font-size:13px}.aside-nav{position:sticky;top:110px;height:max-content;padding:22px;background:var(--mist);border-radius:20px}.aside-nav a{display:block;padding:8px 0;color:#42536a}.footer{background:#0d1725;color:#c0ccda;padding:60px 0 28px}.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:40px}.footer h3{color:white;font-size:16px;margin-bottom:15px}.footer a{display:block;margin:8px 0;font-size:14px}.footer small{display:block;border-top:1px solid #29384b;margin-top:40px;padding-top:22px}.empty-state{padding:34px;border:1px dashed #9db8d9;border-radius:20px;background:#f8fbff}.archive-note{font-size:14px;color:var(--muted)}@media(max-width:850px){.navlinks,.nav-cta{display:none}.menu{display:block}.hero-grid,.section-head,.timeline,.article-layout{grid-template-columns:1fr}.hero{min-height:auto}.hero-grid{padding:70px 0}.hero-art{margin:45px -80px 0 30px}.hero-art img{border-radius:26px}.device-split,.article-grid{grid-template-columns:1fr}.device-pane+ .device-pane{border-left:0;border-top:1px solid var(--line)}.path{grid-template-columns:1fr}.path:before{left:22px;right:auto;top:20px;bottom:30px;width:1px;height:auto}.step{display:grid;grid-template-columns:46px 1fr;column-gap:20px}.step h3{margin:10px 0}.step p{grid-column:2}.timeline{gap:30px}.release-row{grid-template-columns:90px 1fr}.release-row span{grid-column:2}.footer-grid{grid-template-columns:1fr 1fr}section{padding:72px 0}}@media(max-width:520px){.wrap{width:min(100% - 28px,1180px)}.hero-grid{padding:50px 0}.hero h1{font-size:46px}.hero-art{margin:38px -55px 0 12px}.trustline{gap:12px}.device-pane{padding:28px}.footer-grid{grid-template-columns:1fr}.article-grid{grid-template-columns:1fr}}