:root{
  --brand:#1677EE;--bright:#3395FF;--deep:#075FC6;--dark:#08488D;--navy:#0A315E;--footer:#071D37;
  --ink:#16243A;--text:#3C485A;--muted:#6B7787;--soft:#929BA8;--line:rgba(22,119,238,.12);
  --ice:#F7FAFF;--pale:#EDF5FF;--mist:#E5F1FF;--shadow:0 12px 34px rgba(30,72,120,.08);--brand-shadow:0 14px 40px rgba(22,119,238,.14);
  --radius:24px;--shell:min(1320px,calc(100% - 48px));
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#fff;color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;line-height:1.72;overflow-x:hidden}a{color:inherit;text-decoration:none}img{display:block;max-width:100%;height:auto}button,input{font:inherit}.shell{width:var(--shell);margin-inline:auto}.skip-link{position:fixed;left:16px;top:-80px;z-index:9999;background:#fff;color:var(--deep);padding:10px 14px;border-radius:10px;box-shadow:var(--shadow)}.skip-link:focus{top:12px}.site-header{position:sticky;top:0;z-index:900;background:rgba(255,255,255,.94);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}.desktop-nav{height:74px;display:flex;align-items:center;gap:22px}.brand-island{display:flex;align-items:center;gap:10px;min-width:190px;height:50px;padding:6px 12px 6px 8px;border:1px solid var(--line);border-radius:18px;background:linear-gradient(135deg,#fff,#f2f8ff);font-weight:800;color:var(--ink)}.brand-logo-slot,.menu-logo,.footer-logo{display:grid;place-items:center;background:#fff;border-radius:13px;overflow:hidden;border:1px solid var(--line)}.brand-logo-slot{width:38px;height:38px}.brand-logo-slot img{width:100%;height:100%;object-fit:contain}.top-links{display:flex;align-items:center;gap:4px;flex:1;white-space:nowrap}.top-links a,.nav-actions a,.icon-button{min-height:44px;display:flex;align-items:center;justify-content:center;padding:0 11px;border-radius:13px;color:#30415a;font-size:15px;font-weight:650;border:0;background:transparent;cursor:pointer}.top-links a:hover,.nav-actions a:hover,.icon-button:hover,.top-links a:focus-visible,.nav-actions a:focus-visible,.icon-button:focus-visible{background:var(--pale);color:var(--deep);outline:2px solid rgba(22,119,238,.22);outline-offset:2px}.top-links a.is-current,.nav-actions a.is-current{background:var(--pale);color:var(--deep);position:relative}.top-links a.is-current:before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand);margin-right:6px}.nav-actions{display:flex;align-items:center;gap:4px;white-space:nowrap}.app-link{background:linear-gradient(135deg,#3998FF 0%,#1677EE 55%,#075FC6 100%)!important;color:#fff!important;padding-inline:15px!important}.mobile-nav{display:none;height:62px;padding:0 14px;align-items:center;justify-content:space-between}.mobile-brand{display:flex;align-items:center;gap:7px;color:var(--ink);font-weight:800}.mobile-brand img{width:32px;height:32px;object-fit:contain}.mobile-icon{min-width:48px;min-height:44px;border:0;border-radius:12px;background:var(--pale);color:var(--deep);font-weight:700}.site-main{min-height:60vh}.hero-banner{width:var(--shell);margin:26px auto 0;aspect-ratio:16/7;max-height:520px;border-radius:30px;overflow:hidden;position:relative;background:linear-gradient(135deg,#0a315e 0%,#1677ee 48%,#edf5ff 100%);box-shadow:var(--brand-shadow)}.hero-banner img{width:100%;height:100%;object-fit:contain;position:absolute;inset:0}.hero-fallback{position:absolute;inset:0;display:flex;align-items:flex-end;padding:46px;color:#fff;background:linear-gradient(90deg,rgba(7,29,55,.74) 0%,rgba(7,29,55,.28) 48%,rgba(7,29,55,0) 74%)}.hero-fallback>div{max-width:560px;background:rgba(7,29,55,.74);padding:24px 26px;border-radius:20px;backdrop-filter:blur(10px)}.hero-fallback .eyebrow{color:#dceeff}.hero-fallback h1{margin:7px 0 10px;font-size:clamp(42px,5vw,56px);line-height:1.08}.hero-fallback p{margin:0;color:#eef7ff;font-size:16px}.hero-banner img:not([style*="display: none"])+.hero-fallback{pointer-events:none}.quick-grid{width:var(--shell);margin:18px auto 58px;display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.quick-grid a{min-height:116px;padding:20px;border-radius:20px;background:var(--ice);border:1px solid var(--line);display:flex;flex-direction:column;justify-content:space-between;transition:.2s}.quick-grid a:hover{transform:translateY(-2px);background:var(--pale);box-shadow:var(--shadow)}.quick-grid strong{color:var(--ink);font-size:20px}.quick-grid span{color:var(--muted);font-size:14px}.section{padding:64px 0}.section.alt{background:var(--ice)}.section.blue{background:var(--pale)}.section.navy{background:var(--navy);color:#dceeff}.section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:28px}.section-head>div{max-width:760px}.eyebrow{font-size:13px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--brand)}.section-head h2,.inner-hero h1{margin:6px 0 8px;color:var(--ink);line-height:1.2}.section-head h2{font-size:clamp(28px,3vw,34px)}.section-head p{margin:0;color:var(--muted);max-width:760px}.section.navy .section-head h2,.section.navy h2,.section.navy h3{color:#fff}.section.navy p,.section.navy li{color:#dceeff}.text-link{display:inline-flex;min-height:44px;align-items:center;color:var(--deep);font-weight:750}.editorial-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;grid-template-rows:auto auto;gap:16px}.editorial-card{padding:26px;border:1px solid var(--line);border-radius:22px;background:#fff;box-shadow:var(--shadow)}.editorial-card.primary{grid-row:span 2;background:linear-gradient(145deg,#fff,#edf5ff)}.editorial-card h3{margin:4px 0 10px;color:var(--ink);font-size:22px}.editorial-card p{margin:0;color:var(--muted)}.editorial-list{margin-top:18px;display:grid;gap:12px}.editorial-list a{display:flex;gap:12px;align-items:center;padding:12px 0;border-top:1px solid var(--line);font-weight:700;color:var(--ink)}.dot{width:9px;height:9px;border-radius:50%;background:var(--brand);flex:none}.split-feature{display:grid;grid-template-columns:55fr 45fr;gap:34px;align-items:center}.city-feature-image,.app-preview-image,.media-slot,.brand-image-slot{position:relative;overflow:hidden;border-radius:26px;background:linear-gradient(135deg,#e5f1ff,#fff);border:1px solid var(--line)}.city-feature-image{aspect-ratio:4/3}.city-feature-image img,.brand-image-slot img{width:100%;height:100%;object-fit:cover}.feature-copy h2{font-size:clamp(28px,3vw,34px);margin:0 0 12px;color:var(--ink)}.feature-copy p{margin:0 0 14px}.bullet-links{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:22px}.bullet-links a{min-height:52px;display:flex;align-items:center;padding:12px 14px;border-radius:14px;background:var(--pale);color:var(--deep);font-weight:700}.time-board{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.time-item{padding:22px;border-radius:20px;background:#fff;border:1px solid var(--line)}.time-item b{display:block;color:var(--deep);font-size:14px}.time-item h3{margin:5px 0 8px;color:var(--ink);font-size:19px}.time-item p{margin:0;color:var(--muted);font-size:15px}.route{display:grid;grid-template-columns:repeat(6,1fr);gap:10px}.route-step{position:relative;padding:20px 15px;border-radius:18px;background:#fff;border:1px solid var(--line);text-align:center}.route-step strong{display:block;color:var(--ink);font-size:17px}.route-step span{font-size:13px;color:var(--muted)}.interest-cloud{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}.interest-cloud a{min-height:82px;display:flex;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:18px;background:#fff;color:var(--ink);font-size:17px;font-weight:750}.qa-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.qa-item{padding:22px;border-left:4px solid var(--brand);background:#fff;border-radius:0 20px 20px 0;box-shadow:var(--shadow)}.qa-item h3{margin:0 0 8px;color:var(--ink);font-size:19px}.qa-item p{margin:0;color:var(--muted)}.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.article-card{padding:24px;border-radius:22px;border:1px solid var(--line);background:#fff}.article-card h3{margin:0 0 10px;color:var(--ink);font-size:20px}.article-card p{margin:0;color:var(--muted)}.story-layout{display:grid;grid-template-columns:1.35fr 1fr;gap:22px}.story-main{padding:30px;border-radius:26px;background:linear-gradient(145deg,#0a315e,#075fc6);color:#dceeff}.story-main h3{margin:0 0 12px;color:#fff;font-size:26px}.story-main p{margin:0}.story-side{display:grid;gap:12px}.story-side article{padding:18px 20px;border:1px solid var(--line);border-radius:18px;background:#fff}.story-side h3{margin:0 0 6px;color:var(--ink);font-size:18px}.story-side p{margin:0;color:var(--muted);font-size:14px}.topic-list{display:grid;gap:12px}.topic-list a{display:grid;grid-template-columns:52px 1fr auto;gap:15px;align-items:center;min-height:82px;padding:14px 18px;background:#fff;border:1px solid var(--line);border-radius:18px}.topic-num{font-size:26px;font-weight:800;color:#b8d8ff}.topic-list strong{color:var(--ink);font-size:18px}.topic-list span{color:var(--muted);font-size:14px}.guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.guide-card{padding:24px;border-radius:20px;background:#fff;border:1px solid var(--line)}.guide-card b{color:var(--brand);font-size:13px}.guide-card h3{margin:6px 0 10px;color:var(--ink);font-size:20px}.guide-card p{margin:0;color:var(--muted)}.album-grid{display:grid;grid-template-columns:2fr 1fr 1fr;grid-template-rows:220px 180px;gap:14px}.media-slot{min-height:160px;background:linear-gradient(135deg,#e5f1ff,#fff)}.media-slot:after{content:"";position:absolute;inset:18px;border-radius:18px;border:1px dashed rgba(22,119,238,.18)}.media-slot.wide{grid-row:span 2}.pulse-list{display:grid;gap:10px}.pulse-item{display:grid;grid-template-columns:140px 1fr;gap:20px;padding:18px 20px;border-radius:18px;background:#fff;border:1px solid var(--line)}.pulse-item strong{color:var(--deep)}.pulse-item p{margin:0;color:var(--muted)}.app-preview-image{min-height:420px;display:grid;place-items:center;padding:18px}.app-preview-image img{max-height:520px;width:auto;object-fit:contain}.safe-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.safe-item{padding:22px;border-radius:18px;border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.05)}.safe-item h3{margin:0 0 8px;color:#fff;font-size:19px}.safe-item p{margin:0;color:#dceeff}.privacy-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.privacy-grid div{padding:18px;border-radius:16px;border:1px solid var(--line);background:#fff;color:var(--ink);font-weight:700}.inner-hero{padding:62px 0 42px;background:linear-gradient(180deg,#f4f9ff 0%,#fff 100%);border-bottom:1px solid var(--line)}.inner-hero .hero-inner{width:min(980px,calc(100% - 48px));margin:auto}.inner-hero h1{font-size:clamp(36px,4vw,46px)}.inner-hero p{max-width:820px;margin:0;color:var(--muted);font-size:17px}.crumb{display:flex;gap:8px;align-items:center;color:var(--soft);font-size:13px;margin-bottom:12px}.content-wrap{width:min(1180px,calc(100% - 48px));margin:0 auto}.article-wrap{width:min(820px,calc(100% - 48px));margin:0 auto}.prose-section{padding:54px 0}.prose-section h2{color:var(--ink);font-size:28px;margin:0 0 14px}.prose-section h3{color:var(--ink);font-size:20px;margin:24px 0 8px}.prose-section p{margin:0 0 16px}.prose-section ul{padding-left:20px}.prose-section li{margin:8px 0}.section-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.section-card{padding:24px;border-radius:20px;border:1px solid var(--line);background:#fff}.section-card h2,.section-card h3{margin:0 0 10px;color:var(--ink)}.section-card p{margin:0;color:var(--muted)}.editor-wall{columns:3;column-gap:16px}.editor-note{break-inside:avoid;margin:0 0 16px;padding:22px;border-radius:20px;border:1px solid var(--line);background:#fff}.editor-note h2{font-size:20px;margin:0 0 8px;color:var(--ink)}.editor-note p{margin:0;color:var(--muted)}.magazine-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:20px}.magazine-lead{padding:28px;background:var(--navy);color:#dceeff;border-radius:24px}.magazine-lead h2{color:#fff;margin-top:0}.magazine-stack{display:grid;gap:14px}.magazine-stack article{padding:20px;border:1px solid var(--line);border-radius:18px}.timeline{display:grid;gap:0}.timeline article{position:relative;padding:8px 0 28px 42px;border-left:2px solid #cfe5ff;margin-left:11px}.timeline article:before{content:"";position:absolute;left:-8px;top:14px;width:14px;height:14px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 5px #edf5ff}.timeline h2{font-size:21px;margin:0 0 7px;color:var(--ink)}.index-wall{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}.index-item{padding:20px;border-radius:18px;background:var(--pale);border:1px solid var(--line)}.index-item h2{font-size:19px;margin:0 0 7px;color:var(--ink)}.index-item p{margin:0;font-size:14px;color:var(--muted)}.question-list{display:grid;gap:14px}.question-list article{padding:22px;border-radius:20px;border:1px solid var(--line);background:#fff}.question-list h2{font-size:21px;margin:0 0 8px;color:var(--ink)}.long-index{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.long-index article{padding:24px;border-bottom:1px solid var(--line)}.long-index h2{font-size:21px;margin:0 0 7px;color:var(--ink)}.story-mag{display:grid;grid-template-columns:1.2fr .8fr;gap:24px}.story-feature{padding:28px;border-radius:24px;background:linear-gradient(135deg,#edf5ff,#fff)}.story-feature h2{font-size:26px;margin-top:0;color:var(--ink)}.story-list{display:grid;gap:12px}.story-list article{padding:18px;border-left:3px solid var(--brand)}.big-questions{display:grid;gap:12px}.big-questions article{padding:24px;border-radius:20px;background:var(--ice);border:1px solid var(--line)}.big-questions h2{margin:0 0 8px;color:var(--ink);font-size:23px}.knowledge-index{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.knowledge-index article{padding:22px;border-radius:20px;border:1px solid var(--line);background:#fff}.knowledge-index h2{font-size:20px;margin:0 0 8px;color:var(--ink)}.album-page-grid{display:grid;grid-template-columns:2fr 1fr 1fr;grid-auto-rows:190px;gap:14px}.album-page-grid .media-slot:first-child{grid-row:span 2}.album-page-grid .media-slot:nth-child(4){grid-column:span 2}.principle-grid,.risk-grid,.privacy-list,.rule-sections,.help-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.principle-grid article,.risk-grid article,.privacy-list article,.rule-sections article,.help-grid article{padding:24px;border:1px solid var(--line);border-radius:20px;background:#fff}.principle-grid h2,.risk-grid h2,.privacy-list h2,.rule-sections h2,.help-grid h2{font-size:20px;margin:0 0 8px;color:var(--ink)}.product-layout{display:grid;grid-template-columns:1fr .8fr;gap:34px;align-items:center}.product-device{min-height:520px;display:grid;place-items:center;border-radius:30px;background:linear-gradient(145deg,#0a315e,#1677ee)}.product-device img{max-height:500px;max-width:90%;object-fit:contain}.checklist{display:grid;gap:10px;margin-top:18px}.checklist li{list-style:none;position:relative;padding-left:28px}.checklist li:before{content:"✓";position:absolute;left:0;color:var(--brand);font-weight:900}.faq-list{display:grid;gap:12px}.faq-list details{border:1px solid var(--line);border-radius:18px;padding:0 20px;background:#fff}.faq-list summary{cursor:pointer;min-height:60px;display:flex;align-items:center;color:var(--ink);font-weight:800}.faq-list p{margin:0 0 20px;color:var(--muted)}.contact-flow{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;counter-reset:flow}.contact-flow article{padding:20px;border-radius:18px;background:var(--pale);counter-increment:flow}.contact-flow article:before{content:"0" counter(flow);display:block;color:var(--brand);font-weight:900;margin-bottom:8px}.brand-image-slot{aspect-ratio:4/3}.mega-panel,.search-panel{position:fixed;left:0;right:0;top:74px;z-index:1100;background:#fff;transform:translateY(-16px);opacity:0;visibility:hidden;pointer-events:none;transition:.2s;border-top:1px solid var(--line);box-shadow:0 28px 60px rgba(7,29,55,.18)}.mega-panel.is-open,.search-panel.is-open{transform:none;opacity:1;visibility:visible;pointer-events:auto}.panel-head{display:flex;align-items:center;justify-content:space-between;padding-top:22px}.menu-brand{display:flex;align-items:center;gap:12px}.menu-logo{width:44px;height:44px}.menu-logo img{width:100%;height:100%;object-fit:contain}.menu-brand strong{display:block;color:var(--ink);font-size:18px}.menu-brand small{color:var(--muted)}.panel-close{min-width:54px;min-height:44px;border:1px solid var(--line);border-radius:12px;background:#fff;color:var(--deep);font-weight:750}.mega-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:18px;padding-top:22px;padding-bottom:30px}.mega-grid section{padding:18px;border-radius:18px;background:var(--ice)}.mega-grid h2{font-size:14px;margin:0 0 10px;color:var(--muted)}.mega-grid a{display:flex;align-items:center;min-height:38px;color:var(--ink);font-weight:700}.mega-grid a:hover{color:var(--brand)}.search-box{padding:28px 0 32px}.search-head{display:flex;justify-content:space-between;gap:18px;align-items:start}.search-head strong{font-size:24px;color:var(--ink)}.search-head p{margin:4px 0;color:var(--muted)}.search-links{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:20px}.search-links a{display:flex;min-height:58px;align-items:center;padding:12px 16px;border-radius:16px;background:var(--pale);color:var(--deep);font-weight:750}.overlay{position:fixed;inset:74px 0 0;z-index:1050;background:rgba(7,29,55,.34);opacity:0;visibility:hidden;pointer-events:none}.overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}.panel-open{overflow:hidden}.mobile-bottom{display:none}.site-footer{background:var(--footer);color:#dceeff;border-top:1px solid rgba(220,238,255,.2);padding:54px 0 18px}.footer-inner{display:grid;grid-template-columns:1.2fr 2fr;gap:56px}.footer-brand{display:grid;grid-template-columns:50px 1fr;gap:12px;align-items:center}.footer-logo{width:50px;height:50px}.footer-logo img{width:100%;height:100%;object-fit:contain}.footer-brand strong{display:block;color:#fff;font-size:20px}.footer-brand span{font-size:12px;letter-spacing:.12em;color:#a9d3ff}.footer-brand p{grid-column:1/-1;margin:8px 0 0;color:#dceeff}.footer-columns{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}.footer-columns h2{font-size:14px;margin:0 0 10px;color:#fff}.footer-columns a{display:block;min-height:34px;color:#dceeff;font-size:14px}.footer-columns a:hover{color:#fff}.footer-base{margin-top:34px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);display:flex;justify-content:space-between;gap:20px;color:#a9bed3;font-size:13px}.footer-base a{color:#dceeff}
@media(max-width:1100px){.desktop-nav{gap:10px}.brand-island{min-width:auto}.brand-name{display:none}.top-links a,.nav-actions a,.icon-button{padding:0 8px;font-size:14px}.editorial-grid{grid-template-columns:1.4fr 1fr}.editorial-card.primary{grid-row:auto;grid-column:span 2}.article-grid,.guide-grid,.knowledge-index{grid-template-columns:repeat(2,1fr)}.interest-cloud{grid-template-columns:repeat(4,1fr)}.route{grid-template-columns:repeat(3,1fr)}.privacy-grid{grid-template-columns:repeat(2,1fr)}.index-wall{grid-template-columns:repeat(3,1fr)}.mega-grid{grid-template-columns:repeat(3,1fr)}}
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