:root{--bg:#F5F8FC;--nav:#0A182A;--ink:#102033;--body:#263748;--muted:#657789;--soft:#8C9AAA;--blue:#3B82F6;--deep:#172B4D;--ice:#38BDF8;--cyan:#22D3C5;--indigo:#6366F1;--line:rgba(59,130,246,.14);--shadow:0 20px 50px rgba(29,78,119,.10);--radius:24px;--max:1240px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--body);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;line-height:1.75;overflow-x:hidden}.drawer-open{overflow:hidden}a{color:#2563EB;text-decoration:none}a:hover{text-decoration:none}img{max-width:100%;height:auto;display:block}.site-main{min-height:60vh}.site-header{position:sticky;top:0;width:100%;z-index:9999;background:rgba(10,24,42,.94);backdrop-filter:blur(16px);box-shadow:0 8px 28px rgba(10,35,60,.12);border-bottom:1px solid rgba(255,255,255,.08)}.header-inner{max-width:1280px;margin:0 auto;min-height:72px;padding:0 22px;display:flex;align-items:center;justify-content:space-between;gap:18px}.site-logo{display:flex;align-items:center;gap:10px;color:#fff;white-space:nowrap}.site-logo img{max-height:44px;width:auto}.site-logo strong{font-size:19px;letter-spacing:.06em}.nav-core{display:flex;align-items:center;gap:8px}.nav-core a{color:#DCEAF7;padding:8px 12px;border-radius:999px;font-size:15px}.nav-core a:hover,.nav-core a.active{color:#fff;background:rgba(56,189,248,.14)}.header-actions{display:flex;align-items:center;gap:10px}.main-btn,.secondary-btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 22px;border-radius:999px;font-weight:700;transition:.2s ease}.main-btn{background:linear-gradient(135deg,#2563EB 0%,#3B82F6 48%,#22D3C5 100%);color:#fff;box-shadow:0 14px 32px rgba(37,99,235,.20)}.main-btn:hover{transform:translateY(-1px);box-shadow:0 18px 38px rgba(37,99,235,.26)}.main-btn:focus-visible,.secondary-btn:focus-visible,a:focus-visible,button:focus-visible{outline:3px solid rgba(56,189,248,.45);outline-offset:3px}.secondary-btn{border:1px solid rgba(37,99,235,.22);background:#fff;color:#2563EB}.menu-toggle{width:42px;height:42px;border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.06);border-radius:13px;display:flex;flex-direction:column;gap:5px;align-items:center;justify-content:center;cursor:pointer}.menu-toggle span{display:block;width:19px;height:2px;background:#EAF4FF;border-radius:999px}.mobile-menu-toggle{display:none}.site-drawer{position:fixed;z-index:10002;right:0;top:0;width:min(390px,90vw);height:100vh;background:#F8FBFF;box-shadow:-30px 0 70px rgba(8,32,58,.18);padding:22px;transform:translateX(105%);transition:transform .25s ease;overflow:auto}.drawer-open .site-drawer{transform:translateX(0)}.drawer-mask{position:fixed;z-index:10001;inset:0;background:rgba(5,20,35,.45);opacity:0;visibility:hidden;transition:.2s ease}.drawer-mask.show{opacity:1;visibility:visible}.drawer-head{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);padding-bottom:16px}.drawer-head strong{color:var(--ink);font-size:18px}.drawer-close{border:0;background:#EAF4FF;color:#172B4D;width:38px;height:38px;border-radius:50%;font-size:24px;cursor:pointer}.drawer-nav{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:20px}.drawer-nav a{background:#fff;border:1px solid var(--line);padding:12px 14px;border-radius:14px;color:#27425E}.drawer-nav a:hover{background:#EEF7FF;color:#2563EB}
.container{width:min(var(--max),calc(100% - 40px));margin:0 auto}.section{padding:82px 0}.section.tight{padding:58px 0}.section.alt{background:#EEF7FF}.section.mint{background:#E8FCFA}.section.deep{background:linear-gradient(135deg,#102A44,#173C5D);color:#EAF4FF}.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:28px}.section-kicker,.eyebrow,.label,.badge{color:#0284C7;font-size:13px;font-weight:800;letter-spacing:.13em;text-transform:uppercase}.section.deep .section-kicker{color:#7DD3FC}.section-title,h1,h2,h3{color:var(--ink);line-height:1.22;margin:0 0 14px}.section.deep h2,.section.deep h3{color:#fff}.section-title{font-size:clamp(28px,4vw,44px)}.lead{font-size:18px;color:#52677B;max-width:760px}.section.deep .lead{color:#C7D9E9}.muted{color:var(--muted)}.text-link{display:inline-flex;align-items:center;gap:6px;font-weight:700}.text-link:after{content:'→';transition:.2s}.text-link:hover:after{transform:translateX(3px)}
.hero{position:relative;overflow:hidden;background:linear-gradient(135deg,#FBFDFF 0%,#EEF7FF 45%,#E8FCFA 100%);padding:78px 0 66px}.hero:before{content:'';position:absolute;right:-90px;top:-80px;width:360px;height:360px;border-radius:50%;background:rgba(56,189,248,.16);filter:blur(8px)}.hero:after{content:'';position:absolute;left:-100px;bottom:-160px;width:360px;height:360px;border-radius:50%;background:rgba(99,102,241,.08)}.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}.hero h1{font-size:clamp(46px,7vw,84px);letter-spacing:-.04em}.hero-sub{font-size:clamp(22px,3vw,34px);color:#17314D;font-weight:700;margin:0 0 18px}.hero-copy{font-size:17px;color:#52677B;max-width:690px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}.hero-points{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}.hero-points span{background:rgba(255,255,255,.74);border:1px solid rgba(59,130,246,.14);padding:9px 13px;border-radius:999px;color:#27506E;font-size:14px}.hero-visual{position:relative}.hero-visual .hero-main{border-radius:30px;box-shadow:0 30px 80px rgba(29,78,119,.18);background:#fff}.hero-float{position:absolute;left:-40px;bottom:-34px;width:38%;border-radius:22px;box-shadow:var(--shadow);border:6px solid rgba(255,255,255,.86)}
.feature-strip{margin-top:-1px;background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.feature-strip-inner{display:grid;grid-template-columns:repeat(4,1fr)}.feature-item{padding:24px 24px 24px 0}.feature-item+.feature-item{padding-left:24px;border-left:1px solid var(--line)}.feature-num{display:block;font-weight:900;color:#38BDF8;font-size:12px;letter-spacing:.12em}.feature-item h3{font-size:18px;margin:5px 0 7px}.feature-item p{margin:0;font-size:14px;color:#657789;line-height:1.7}
.pill-cloud{display:flex;flex-wrap:wrap;gap:12px}.channel-pill{display:block;min-width:170px;max-width:280px;padding:14px 16px;background:rgba(255,255,255,.82);border:1px solid var(--line);border-radius:20px}.channel-pill strong{display:block;color:#17314D;margin-bottom:2px}.channel-pill span{display:block;color:#718396;font-size:13px;line-height:1.55}.channel-pill:hover{background:#fff;box-shadow:0 12px 28px rgba(29,78,119,.08)}
.split{display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:center}.split.reverse .media{order:2}.media img,.content-img{border-radius:26px;box-shadow:var(--shadow);background:#fff}.editorial{display:grid;grid-template-columns:1.2fr .8fr;gap:32px}.editorial-aside{display:grid;gap:14px}.mini-card,.card,.zone-card,.info-card,.review-card{background:rgba(255,255,255,.90);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:22px}.mini-card{padding:20px}.card,.zone-card,.info-card{padding:28px}.mini-card h3,.card h3,.zone-card h3{font-size:19px}.number{font-size:12px;font-weight:900;letter-spacing:.12em;color:#38BDF8}.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.zone-card img,.card img{margin-bottom:18px;border-radius:18px}.zone-blue{background:#EEF7FF}.zone-mint{background:#E8FCFA}.zone-dark{background:#12253A;color:#DDEAF6;border-color:rgba(255,255,255,.08)}.zone-dark h2,.zone-dark h3{color:#fff}.service-points{display:grid;gap:12px;margin:18px 0}.service-point{padding:14px 0;border-top:1px solid rgba(59,130,246,.12)}.service-point strong{display:block;color:#17314D}.zone-dark .service-point strong{color:#fff}.zone-dark .service-point{border-color:rgba(255,255,255,.12)}
.media-stack{position:relative;padding:20px}.media-stack img:first-child{width:84%;margin-left:auto;border-radius:26px;box-shadow:var(--shadow)}.media-stack img:last-child{width:52%;margin-top:-100px;border-radius:22px;border:7px solid #F5F8FC;box-shadow:var(--shadow)}.topic-list{display:grid;gap:10px}.topic-row{display:flex;justify-content:space-between;gap:14px;padding:14px 0;border-bottom:1px solid var(--line)}.topic-row strong{color:#17314D}.topic-row span{color:#8C9AAA;font-size:13px}.timeline{display:grid;gap:18px}.timeline-item{display:grid;grid-template-columns:70px 1fr;gap:16px}.date-chip{width:66px;height:66px;border-radius:18px;background:#172B4D;color:#fff;display:flex;align-items:center;justify-content:center;text-align:center;font-weight:800;line-height:1.15}.timeline-item h3{margin-bottom:5px}
.security-band{background:linear-gradient(135deg,#E9F5FF,#E8FCFA);border-top:1px solid rgba(59,130,246,.08);border-bottom:1px solid rgba(34,211,197,.15)}.security-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.security-card{display:grid;grid-template-columns:170px 1fr;gap:22px;align-items:center;background:rgba(255,255,255,.74);border:1px solid rgba(255,255,255,.88);padding:24px;border-radius:26px}.security-card img{border-radius:18px}.reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;align-items:start}.review-card{padding:24px}.review-card:nth-child(2),.review-card:nth-child(5){margin-top:22px}.review-card p{margin:0;color:#475E73}.review-card small{display:block;margin-top:14px;color:#8C9AAA}.quote{font-size:32px;line-height:1;color:#38BDF8;font-weight:900}
.faq-list{display:grid;gap:12px}.faq-item details{background:#fff;border:1px solid var(--line);border-radius:18px;padding:0 20px}.faq-item summary{cursor:pointer;list-style:none;font-weight:800;color:#17314D;padding:18px 0}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary:after{content:'+';float:right;color:#38BDF8;font-size:22px}.faq-item details[open] summary:after{content:'–'}.faq-item p{padding:0 0 18px;margin:0;color:#5B7083}.notice{padding:28px;border-radius:24px;background:#12253A;color:#D8E8F5}.notice h2,.notice h3{color:#fff}.notice a{color:#7DD3FC}
.page-hero{padding:70px 0 52px;background:linear-gradient(135deg,#FBFDFF,#EEF7FF 55%,#E8FCFA)}.page-hero-grid{display:grid;grid-template-columns:1fr .8fr;gap:44px;align-items:center}.page-hero h1{font-size:clamp(38px,6vw,66px)}.page-hero img{border-radius:28px;box-shadow:var(--shadow)}.tag-cloud{display:flex;flex-wrap:wrap;gap:9px}.tag-cloud span{padding:8px 12px;border-radius:999px;background:#E9F5FF;color:#2563EB;border:1px solid rgba(59,130,246,.12);font-size:14px}.step-list{counter-reset:steps;display:grid;gap:18px}.step{position:relative;padding:24px 24px 24px 76px;background:#fff;border:1px solid var(--line);border-radius:20px}.step:before{counter-increment:steps;content:counter(steps,decimal-leading-zero);position:absolute;left:22px;top:22px;color:#38BDF8;font-size:18px;font-weight:900}.article-prose p{margin:0 0 18px}.article-prose h2{font-size:30px;margin-top:34px}.article-prose h3{font-size:21px;margin-top:24px}.callout{padding:24px 26px;border-left:4px solid #38BDF8;background:#EEF7FF;border-radius:0 18px 18px 0}.help-cats{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.help-cat{background:#fff;border:1px solid var(--line);border-radius:20px;padding:24px}.contact-flow{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.contact-flow .stepbox{padding:22px;background:#fff;border:1px solid var(--line);border-radius:20px}.contact-flow strong{display:block;color:#17314D;margin:8px 0}.device-showcase{display:grid;grid-template-columns:.8fr 1.2fr;gap:40px;align-items:center}.device-showcase img{max-height:620px;margin:auto}.stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.stat{background:#fff;border:1px solid var(--line);border-radius:20px;padding:24px}.stat b{font-size:32px;color:#2563EB;display:block}.announce-list{display:grid;gap:12px}.announce{display:grid;grid-template-columns:110px 1fr;gap:20px;padding:20px;background:#fff;border:1px solid var(--line);border-radius:18px}.announce time{color:#2563EB;font-weight:800}.site-footer{background:#0C1B2A;color:#EAF4FF;padding:64px 0 28px}.footer-inner{width:min(var(--max),calc(100% - 40px));margin:auto}.footer-brand{display:grid;grid-template-columns:250px 1fr;gap:28px;padding-bottom:34px;border-bottom:1px solid rgba(255,255,255,.09)}.footer-logo{display:flex;align-items:center;gap:10px;color:#fff;font-size:20px;font-weight:800}.footer-logo img{max-height:42px;width:auto}.footer-brand p{color:#B8CAD9;margin:0;max-width:720px}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;padding:36px 0}.footer-grid h2{color:#fff;font-size:15px;margin-bottom:14px}.footer-grid a{display:block;color:#C9D9E8;margin:7px 0;font-size:14px}.footer-grid p{color:#9FB3C4;font-size:13px}.footer-bottom{display:flex;justify-content:space-between;gap:20px;padding-top:24px;border-top:1px solid rgba(255,255,255,.08);font-size:13px;color:#8FA6B9}.mobile-bottom-nav{display:none}
@media (max-width:1060px){.nav-core{display:none}.mobile-menu-toggle{display:flex}.desktop-menu-toggle{display:none}.hero-grid,.page-hero-grid,.split,.editorial,.device-showcase{grid-template-columns:1fr}.hero-visual{max-width:760px}.hero-float{left:0}.grid-4{grid-template-columns:repeat(2,1fr)}.reviews{grid-template-columns:repeat(2,1fr)}.help-cats{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:repeat(2,1fr)}.feature-strip-inner{grid-template-columns:repeat(2,1fr)}.feature-item:nth-child(3){border-left:0;padding-left:0;border-top:1px solid var(--line)}.feature-item:nth-child(4){border-top:1px solid var(--line)}.contact-flow{grid-template-columns:repeat(2,1fr)}}
@media (max-width:720px){body{padding-bottom:66px}.header-inner{min-height:64px;padding:0 12px;gap:8px;position:relative}.site-logo{position:absolute;left:50%;transform:translateX(-50%)}.site-logo strong{display:none}.site-logo img{max-height:38px}.header-actions{margin-left:auto}.header-cta{min-height:40px;padding:0 14px;font-size:13px}.mobile-menu-toggle{width:40px;height:40px}.container{width:min(100% - 28px,var(--max))}.section{padding:60px 0}.section.tight{padding:46px 0}.section-head{display:block}.hero{padding:54px 0 50px}.hero-grid{gap:34px}.hero h1{font-size:48px}.hero-sub{font-size:24px}.hero-copy{font-size:16px}.hero-float{position:relative;width:62%;margin-top:-50px}.feature-strip-inner{grid-template-columns:1fr}.feature-item,.feature-item+.feature-item,.feature-item:nth-child(3),.feature-item:nth-child(4){padding:20px 0;border-left:0;border-top:1px solid var(--line)}.feature-item:first-child{border-top:0}.grid-2,.grid-3,.grid-4,.security-grid,.reviews,.help-cats,.stat-row,.contact-flow{grid-template-columns:1fr}.security-card{grid-template-columns:100px 1fr;padding:18px}.reviews .review-card{margin-top:0}.media-stack img:first-child{width:94%}.media-stack img:last-child{width:64%;margin-top:-60px}.timeline-item{grid-template-columns:58px 1fr}.date-chip{width:54px;height:54px;border-radius:15px;font-size:12px}.page-hero{padding:48px 0 38px}.page-hero-grid{gap:26px}.page-hero h1{font-size:40px}.footer-brand{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.footer-bottom{display:block}.footer-bottom span{display:block;margin-top:6px}.mobile-bottom-nav{position:fixed;z-index:9998;display:grid;grid-template-columns:repeat(4,1fr);bottom:0;left:0;right:0;min-height:60px;background:rgba(10,24,42,.96);backdrop-filter:blur(14px);padding-bottom:env(safe-area-inset-bottom);border-top:1px solid rgba(255,255,255,.08)}.mobile-bottom-nav a{display:flex;align-items:center;justify-content:center;color:#DCEAF7;font-size:13px}.drawer-nav{grid-template-columns:1fr}.announce{grid-template-columns:1fr}.site-drawer{width:min(360px,92vw)}}
@media (max-width:420px){.header-cta{padding:0 12px}.hero h1{font-size:42px}.footer-grid{grid-template-columns:1fr}.security-card{grid-template-columns:1fr}.channel-pill{max-width:none;width:100%}}