:root{
  --ink:#10131a;
  --ink-2:#1b2230;
  --muted:#657086;
  --paper:#f7f9fc;
  --paper-2:#eef3fb;
  --white:#fff;
  --blue:#2d6bff;
  --blue-2:#77a6ff;
  --blue-soft:#e8f0ff;
  --line:#dce4f0;
  --green:#3bcf85;
  --shell:1240px;
  --radius-xl:42px;
  --radius-lg:30px;
  --radius-md:18px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;background:var(--paper)}
body{min-width:320px;overflow-x:hidden;color:var(--ink);background:var(--paper);font-family:"PingFang SC","Microsoft YaHei",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}img{display:block;max-width:100%}button{font:inherit;color:inherit}.skip-link{position:fixed;left:16px;top:-100px;z-index:9999;padding:10px 16px;color:#fff;background:var(--ink);border-radius:10px}.skip-link:focus{top:16px}.site-header{position:sticky;top:0;z-index:100;background:rgba(247,249,252,.82);border-bottom:1px solid rgba(220,228,240,.82);backdrop-filter:blur(18px)}.header-inner{width:min(calc(100% - 48px),var(--shell));height:82px;margin:auto;display:flex;align-items:center;gap:38px}.brand{margin-right:auto}.brand img{width:166px;height:auto}.header-nav{display:flex;gap:28px}.header-nav a{position:relative;color:#505b6e;font-size:13px;font-weight:700}.header-nav a::after{content:"";position:absolute;left:0;bottom:-8px;width:0;height:2px;background:var(--blue);transition:.25s}.header-nav a:hover::after{width:100%}.header-cta{min-height:44px;padding:0 19px;display:inline-flex;align-items:center;border-radius:999px;color:#fff;background:var(--ink);font-size:12px;font-weight:800}.menu-button{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:50%;background:#fff;cursor:pointer}.menu-button span{display:block;width:17px;height:2px;margin:5px auto;background:var(--ink);transition:.25s}.mobile-nav{display:none}
.hero{position:relative;overflow:hidden;padding:88px 0 0;background:linear-gradient(180deg,#fbfcff 0%,#f2f6fd 100%)}.hero::before{content:"";position:absolute;width:640px;height:640px;right:-240px;top:-280px;border-radius:50%;background:radial-gradient(circle,rgba(99,151,255,.28),rgba(99,151,255,0) 70%)}.hero-grid{position:relative;z-index:1;width:min(calc(100% - 48px),var(--shell));margin:auto;display:grid;grid-template-columns:.83fr 1.17fr;gap:68px;align-items:center}.breadcrumb{display:flex;align-items:center;gap:12px;color:#8b95a6;font-size:12px;font-weight:700}.breadcrumb strong{color:var(--ink)}.overline{margin-top:50px;color:var(--blue);font-size:11px;font-weight:900;letter-spacing:.2em}.hero h1{margin-top:18px;font-size:clamp(58px,6.7vw,98px);line-height:.95;letter-spacing:-.075em;font-weight:900}.hero h1 em{color:var(--blue);font-style:normal}.hero-lead{max-width:620px;margin-top:30px;color:var(--muted);font-size:16px}.hero-actions{margin-top:36px;display:flex;align-items:center;gap:28px}.primary-cta{min-height:60px;padding:0 22px;display:inline-flex;align-items:center;gap:32px;border-radius:16px;color:#fff;background:var(--blue);font-size:14px;font-weight:800;box-shadow:0 18px 38px rgba(45,107,255,.23);transition:transform .25s,box-shadow .25s}.primary-cta:hover{transform:translateY(-3px);box-shadow:0 22px 46px rgba(45,107,255,.31)}.secondary-link{font-size:13px;font-weight:800;border-bottom:1px solid var(--ink)}.hero-meta{margin-top:54px;display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.hero-meta div{padding-top:14px;border-top:1px solid var(--line)}.hero-meta dt{color:#97a1b2;font-size:10px;font-weight:800;letter-spacing:.08em}.hero-meta dd{margin-top:4px;font-size:13px;font-weight:800}.hero-art{position:relative}.hero-art img{width:100%;filter:drop-shadow(0 34px 60px rgba(43,82,150,.12))}.device-pill{position:absolute;right:4%;bottom:11%;padding:13px 18px;display:flex;align-items:center;gap:10px;border:1px solid rgba(255,255,255,.85);border-radius:999px;background:rgba(255,255,255,.78);box-shadow:0 15px 35px rgba(47,81,138,.17);backdrop-filter:blur(14px);font-size:12px;font-weight:800}.device-pill i{width:9px;height:9px;border-radius:50%;background:var(--green);box-shadow:0 0 0 6px rgba(59,207,133,.13)}.hero-ticker{margin-top:64px;overflow:hidden;border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:rgba(255,255,255,.6)}.hero-ticker div{width:max-content;padding:13px 0;color:#9ba5b5;font-size:10px;font-weight:900;letter-spacing:.22em;animation:ticker 26s linear infinite}@keyframes ticker{to{transform:translateX(-50%)}}
.intro-band{width:min(calc(100% - 48px),var(--shell));margin:0 auto;padding:110px 0;display:grid;grid-template-columns:120px 1.05fr .95fr;gap:52px;align-items:start}.intro-number{font-size:88px;line-height:.9;font-weight:900;letter-spacing:-.08em;color:#d5ddeb}.intro-copy span{color:var(--blue);font-size:11px;font-weight:900;letter-spacing:.15em}.intro-copy h2{margin-top:14px;font-size:clamp(38px,4.2vw,62px);line-height:1.06;letter-spacing:-.055em}.intro-band>p{padding-top:30px;color:var(--muted);font-size:15px}
.download-section{padding:110px 0;background:var(--ink)}.download-shell{width:min(calc(100% - 48px),var(--shell));margin:auto;display:grid;grid-template-columns:.72fr 1.28fr;gap:85px;align-items:start}.download-sidebar{position:sticky;top:125px;color:#fff}.section-code{display:block;color:var(--blue);font-size:10px;font-weight:900;letter-spacing:.18em}.section-code.light{color:#8fb4ff}.download-sidebar h2{margin-top:18px;font-size:clamp(42px,4.7vw,66px);line-height:1.02;letter-spacing:-.06em}.download-sidebar>p{max-width:430px;margin-top:24px;color:#9ca9bc;font-size:14px}.safe-note{margin-top:34px;display:flex;align-items:center;gap:12px;color:#dbe5f5;font-size:12px}.safe-note i{width:32px;height:32px;display:grid;place-items:center;border-radius:50%;color:#061b11;background:var(--green);font-style:normal;font-weight:900}.download-panel{padding:38px;border:1px solid rgba(255,255,255,.11);border-radius:var(--radius-xl);background:linear-gradient(145deg,#1b2230,#11151d);box-shadow:0 28px 70px rgba(0,0,0,.28)}.download-panel-top{display:flex;align-items:center;justify-content:space-between;gap:20px;padding-bottom:28px;border-bottom:1px solid rgba(255,255,255,.09)}.download-panel-top span{display:block;color:#738098;font-size:10px;font-weight:900;letter-spacing:.17em}.download-panel-top strong{display:block;margin-top:3px;color:#fff;font-size:22px}.status-badge{padding:8px 12px;border:1px solid rgba(119,166,255,.35);border-radius:999px;color:#9fc0ff;background:rgba(45,107,255,.12);font-size:10px;font-weight:900;letter-spacing:.1em}.download-panel-body{padding:42px 0;display:grid;grid-template-columns:96px 1fr;gap:28px;align-items:center}.os-mark{width:88px;height:88px;display:grid;place-items:center;border-radius:28px;background:#fff}.os-mark svg{width:37px;fill:var(--ink)}.download-panel-body h3{color:#fff;font-size:27px}.download-panel-body p{max-width:560px;margin-top:9px;color:#93a0b4;font-size:13px}.download-button{min-height:78px;padding:0 24px;display:flex;align-items:center;justify-content:space-between;gap:25px;border-radius:20px;color:#fff;background:var(--blue);box-shadow:0 20px 45px rgba(45,107,255,.24);transition:.25s}.download-button:hover{transform:translateY(-3px);background:#3977ff}.download-button small{display:block;color:#bbd1ff;font-size:9px;font-weight:900;letter-spacing:.13em}.download-button span{font-size:16px;font-weight:900}.download-button b{font-size:28px}.download-checks{margin-top:26px;display:grid;gap:0;list-style:none;border-top:1px solid rgba(255,255,255,.08)}.download-checks li{padding:16px 0;display:flex;gap:16px;border-bottom:1px solid rgba(255,255,255,.08);color:#aeb9ca;font-size:12px}.download-checks span{color:#729df8;font-weight:900}
.route-section{padding:118px 0;background:var(--paper)}.section-head{width:min(calc(100% - 48px),var(--shell));margin:auto;display:grid;grid-template-columns:140px 1fr .8fr;gap:44px;align-items:end}.section-head h2{font-size:clamp(42px,5vw,70px);line-height:1.03;letter-spacing:-.06em}.section-head p{color:var(--muted);font-size:14px}.route-image{width:min(calc(100% - 48px),var(--shell));margin:58px auto 0;border-radius:34px;box-shadow:0 28px 65px rgba(22,41,73,.14)}.route-notes{width:min(calc(100% - 48px),var(--shell));margin:18px auto 0;display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.route-notes article{min-height:255px;padding:26px;border:1px solid var(--line);border-radius:22px;background:#fff}.route-notes span{color:#a6afbd;font-size:10px;font-weight:900}.route-notes h3{margin-top:48px;font-size:19px}.route-notes p{margin-top:12px;color:var(--muted);font-size:12px}
.compatibility-section{padding:120px 0;color:#fff;background:linear-gradient(145deg,#204fbd,#2d6bff 60%,#5d92ff)}.compatibility-grid{width:min(calc(100% - 48px),var(--shell));margin:auto;display:grid;grid-template-columns:.72fr 1.28fr;gap:90px;align-items:start}.compatibility-title h2{margin-top:18px;font-size:clamp(48px,5.5vw,76px);line-height:1.02;letter-spacing:-.06em}.compatibility-title p{max-width:440px;margin-top:24px;color:#d4e1ff;font-size:14px}.compatibility-list{border-top:1px solid rgba(255,255,255,.27)}.compat-row{min-height:83px;display:grid;grid-template-columns:.7fr 1.35fr auto;gap:28px;align-items:center;border-bottom:1px solid rgba(255,255,255,.27)}.compat-row span{color:#bed0f7;font-size:11px}.compat-row strong{font-size:16px}.compat-row em{padding:7px 11px;border-radius:999px;color:#0d3924;background:#7ee0a7;font-size:10px;font-style:normal;font-weight:900}
.browser-section{padding:125px 0;background:var(--paper-2)}.browser-layout{width:min(calc(100% - 48px),var(--shell));margin:auto;display:grid;grid-template-columns:1.1fr .9fr;gap:90px;align-items:center}.browser-window{max-width:620px;padding:22px;border-radius:38px;background:#dce6f5;box-shadow:0 30px 70px rgba(24,54,103,.16);transform:rotate(-2deg)}.browser-bar{height:56px;padding:0 20px;display:flex;align-items:center;gap:8px;border-radius:22px 22px 0 0;background:#fff}.browser-bar i{width:10px;height:10px;border-radius:50%;background:#d6deea}.browser-bar i:first-child{background:#ff6673}.browser-bar i:nth-child(2){background:#ffd15d}.browser-bar i:nth-child(3){background:#5cd481}.browser-bar span{margin-left:auto;margin-right:auto;color:#8791a2;font-size:11px;font-weight:800}.browser-content{min-height:410px;padding:75px 52px;border-radius:0 0 22px 22px;background:linear-gradient(145deg,#10131a,#1c2638);color:#fff}.browser-content>b{color:#78a2ff;font-size:10px;letter-spacing:.16em}.browser-content h3{max-width:420px;margin-top:24px;font-size:50px;line-height:1.02;letter-spacing:-.055em}.browser-button{margin-top:58px;padding:17px 18px;border-radius:14px;color:#fff;background:var(--blue);font-size:13px;font-weight:900;text-align:center}.browser-content small{display:block;margin-top:14px;color:#7f8ba0;text-align:center}.browser-copy h2{margin-top:18px;font-size:clamp(45px,5vw,68px);line-height:1.02;letter-spacing:-.06em}.browser-copy>p{margin-top:24px;color:var(--muted);font-size:14px}.browser-copy ol{margin-top:40px;display:grid;gap:0;list-style:none;border-top:1px solid #cad5e5}.browser-copy li{padding:19px 0;display:grid;grid-template-columns:42px 1fr;gap:18px;border-bottom:1px solid #cad5e5}.browser-copy li>b{color:var(--blue);font-size:11px}.browser-copy li span{color:var(--muted);font-size:12px}.browser-copy li strong{display:block;color:var(--ink);font-size:14px}
.support-section{padding:120px 0;background:#fff}.support-head{width:min(calc(100% - 48px),var(--shell));margin:auto;display:grid;grid-template-columns:140px 1fr .8fr;gap:44px;align-items:end}.support-head h2{font-size:clamp(42px,5vw,70px);line-height:1.03;letter-spacing:-.06em}.support-head p{color:var(--muted);font-size:14px}.issue-stack{width:min(calc(100% - 48px),var(--shell));margin:55px auto 0;border-top:1px solid var(--line)}.issue{border-bottom:1px solid var(--line)}.issue button{width:100%;min-height:100px;padding:0;display:flex;align-items:center;justify-content:space-between;gap:30px;border:0;background:transparent;text-align:left;cursor:pointer}.issue button span{display:flex;align-items:center;gap:26px;font-size:20px;font-weight:900}.issue button b{color:#aab3c1;font-size:11px}.issue button i{position:relative;flex:0 0 44px;width:44px;height:44px;border:1px solid var(--line);border-radius:50%}.issue button i::before,.issue button i::after{content:"";position:absolute;left:50%;top:50%;width:14px;height:2px;background:var(--ink);transform:translate(-50%,-50%);transition:.25s}.issue button i::after{transform:translate(-50%,-50%) rotate(90deg)}.issue.open button i{border-color:var(--blue);background:var(--blue)}.issue.open button i::before,.issue.open button i::after{background:#fff}.issue.open button i::after{transform:translate(-50%,-50%) rotate(0)}.issue-answer{max-height:0;overflow:hidden;transition:max-height .35s ease}.issue-answer p{max-width:880px;padding:0 70px 28px 67px;color:var(--muted);font-size:14px}
.faq-section{padding:120px 0;background:var(--paper)}.faq-grid{width:min(calc(100% - 48px),var(--shell));margin:auto;display:grid;grid-template-columns:.72fr 1.28fr;gap:90px}.faq-title{position:sticky;top:125px;align-self:start}.faq-title h2{margin-top:18px;font-size:clamp(46px,5vw,70px);line-height:1.02;letter-spacing:-.06em}.faq-title p{margin-top:24px;color:var(--muted);font-size:14px}.faq-list{border-top:1px solid var(--line)}.faq-list div{padding:28px 0;border-bottom:1px solid var(--line)}.faq-list dt{font-size:18px;font-weight:900}.faq-list dd{margin-top:10px;color:var(--muted);font-size:13px}
.related-section{padding:115px 0;background:#fff}.related-head{width:min(calc(100% - 48px),var(--shell));margin:0 auto 46px;display:flex;align-items:end;justify-content:space-between;gap:30px}.related-head span{color:var(--blue);font-size:10px;font-weight:900;letter-spacing:.18em}.related-head h2{max-width:650px;font-size:clamp(36px,4vw,56px);line-height:1.05;letter-spacing:-.05em;text-align:right}.related-links{width:min(calc(100% - 48px),var(--shell));margin:auto;display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.related-links a{min-height:245px;padding:27px;display:flex;flex-direction:column;border:1px solid var(--line);border-radius:22px;background:var(--paper);transition:.25s}.related-links a:hover{transform:translateY(-6px);color:#fff;background:var(--blue);border-color:var(--blue)}.related-links small{color:#9aa4b4;font-size:10px;font-weight:900}.related-links strong{margin-top:58px;font-size:20px;line-height:1.3}.related-links span{margin-top:auto;font-size:12px;font-weight:900}.related-links a:hover small{color:#c8d9ff}
.final-cta{padding:30px 0 100px;background:#fff}.final-inner{width:min(calc(100% - 48px),var(--shell));margin:auto;padding:55px 58px;display:flex;align-items:center;justify-content:space-between;gap:50px;border-radius:32px;color:#fff;background:linear-gradient(135deg,#14213a,#2d6bff)}.final-inner span{color:#a9c6ff;font-size:10px;font-weight:900;letter-spacing:.17em}.final-inner h2{max-width:760px;margin-top:8px;font-size:clamp(34px,3.9vw,54px);line-height:1.07;letter-spacing:-.045em}.final-inner p{margin-top:12px;color:#d4e1fb;font-size:13px}.final-inner>a{flex:0 0 auto;min-height:62px;padding:0 21px;display:inline-flex;align-items:center;gap:25px;border-radius:15px;color:var(--ink);background:#fff;font-size:13px;font-weight:900}.site-footer{color:#d5deec;background:var(--ink)}.footer-inner{width:min(calc(100% - 48px),var(--shell));margin:auto;padding:70px 0;display:grid;grid-template-columns:1.5fr .7fr .7fr;gap:70px}.footer-brand img{width:170px;filter:brightness(0) invert(1)}.footer-brand p{max-width:440px;margin-top:22px;color:#7f8b9e;font-size:12px}.footer-links{display:flex;flex-direction:column;gap:10px}.footer-links strong{margin-bottom:8px;color:#83aaff;font-size:10px;letter-spacing:.15em}.footer-links a{color:#91a0b5;font-size:12px}.footer-links a:hover{color:#fff}.footer-bottom{width:min(calc(100% - 48px),var(--shell));margin:auto;padding:22px 0;display:flex;justify-content:space-between;border-top:1px solid rgba(255,255,255,.08);color:#657187;font-size:11px}
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease}.reveal.visible{opacity:1;transform:none}
@media(max-width:1040px){.header-nav{display:none}.menu-button{display:block}.header-cta{display:none}.mobile-nav{position:absolute;top:82px;left:0;right:0;padding:18px 24px;display:grid;gap:8px;background:rgba(247,249,252,.97);border-bottom:1px solid var(--line);transform:translateY(-130%);opacity:0;pointer-events:none;transition:.25s}.mobile-nav.open{transform:none;opacity:1;pointer-events:auto}.mobile-nav a{padding:12px;border-radius:10px;background:#fff;font-size:13px;font-weight:800}.hero-grid{grid-template-columns:1fr;gap:55px}.hero-copy{max-width:780px}.hero-art{max-width:830px;margin:auto}.intro-band{grid-template-columns:90px 1fr}.intro-band>p{grid-column:2}.download-shell,.compatibility-grid,.browser-layout,.faq-grid{grid-template-columns:1fr;gap:55px}.download-sidebar,.faq-title{position:static}.section-head,.support-head{grid-template-columns:100px 1fr}.section-head p,.support-head p{grid-column:2}.route-notes,.related-links{grid-template-columns:repeat(2,1fr)}.final-inner{align-items:flex-start;flex-direction:column}.footer-inner{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}}
@media(max-width:720px){.header-inner{width:min(calc(100% - 28px),var(--shell));height:72px}.brand img{width:145px}.mobile-nav{top:72px}.hero{padding-top:58px}.hero-grid,.intro-band,.download-shell,.section-head,.route-image,.route-notes,.compatibility-grid,.browser-layout,.support-head,.issue-stack,.faq-grid,.related-head,.related-links,.final-inner,.footer-inner,.footer-bottom{width:min(calc(100% - 28px),var(--shell))}.hero h1{font-size:54px}.hero-lead{font-size:14px}.hero-actions{align-items:flex-start;flex-direction:column;gap:18px}.hero-meta{grid-template-columns:1fr}.hero-art{margin-top:-10px}.device-pill{right:4px;bottom:5%;font-size:10px}.intro-band{padding:76px 0;grid-template-columns:1fr;gap:25px}.intro-number{font-size:58px}.intro-band>p{grid-column:auto;padding:0}.download-section,.route-section,.compatibility-section,.browser-section,.support-section,.faq-section,.related-section{padding:82px 0}.download-panel{padding:24px;border-radius:28px}.download-panel-body{grid-template-columns:68px 1fr;gap:18px}.os-mark{width:66px;height:66px;border-radius:20px}.download-panel-body h3{font-size:21px}.download-panel-top strong{font-size:18px}.status-badge{display:none}.section-head,.support-head{grid-template-columns:1fr;gap:16px}.section-head p,.support-head p{grid-column:auto}.route-image{margin-top:35px;border-radius:20px}.route-notes,.related-links{grid-template-columns:1fr}.route-notes article{min-height:auto}.compat-row{grid-template-columns:1fr auto;gap:10px;padding:18px 0}.compat-row span{grid-column:1/-1}.browser-window{padding:13px;border-radius:26px;transform:none}.browser-content{min-height:330px;padding:50px 25px}.browser-content h3{font-size:38px}.issue button{min-height:88px}.issue button span{gap:14px;font-size:16px}.issue-answer p{padding:0 12px 24px 35px}.related-head{align-items:flex-start;flex-direction:column}.related-head h2{text-align:left}.final-inner{padding:38px 28px}.footer-inner{grid-template-columns:1fr}.footer-brand{grid-column:auto}.footer-bottom{gap:15px;flex-direction:column}.hero-ticker div{font-size:9px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.hero-ticker div{animation:none}.reveal{opacity:1;transform:none;transition:none}}