*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#fff;color:#3C485A;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei","PingFang SC",Arial,sans-serif;line-height:1.75;overflow-x:hidden}img{max-width:100%;height:auto;display:block}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}.shell{width:min(1320px,calc(100% - 48px));margin-inline:auto}.skip-link{position:fixed;left:16px;top:-80px;z-index:300;background:#071D37;color:#fff;padding:10px 14px;border-radius:8px}.skip-link:focus{top:12px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.site-header{position:sticky;top:0;z-index:120;background:rgba(255,255,255,.96);backdrop-filter:saturate(150%) blur(14px);border-bottom:1px solid rgba(22,119,238,.12)}.desktop-nav{height:74px;display:flex;align-items:center;gap:20px}.brand-island{height:52px;display:flex;align-items:center;gap:10px;padding:6px 12px 6px 7px;background:#F7FAFF;border:1px solid rgba(22,119,238,.12);border-radius:18px;flex:0 0 auto}.logo-slot,.mobile-logo-slot,.drawer-logo-slot,.footer-logo-slot{display:grid;place-items:center;background:linear-gradient(145deg,#EDF5FF,#fff);border:1px solid rgba(22,119,238,.12);overflow:hidden}.logo-slot{width:40px;height:40px;border-radius:12px}.logo-slot img{width:100%;height:100%;object-fit:contain}.brand-name{font-weight:800;color:#16243A;white-space:nowrap}.primary-nav{display:flex;align-items:center;gap:4px;min-width:0;flex:1;white-space:nowrap}.primary-nav a,.tool-link,.icon-button{min-height:44px;display:inline-flex;align-items:center;justify-content:center;padding:0 12px;border-radius:12px;color:#3C485A;font-size:15px}.primary-nav a:hover,.primary-nav a:focus-visible,.tool-link:hover,.tool-link:focus-visible,.icon-button:hover,.icon-button:focus-visible{background:#EDF5FF;color:#075FC6;outline:none}.primary-nav a.active,.tool-link.active{background:#EDF5FF;color:#075FC6;font-weight:700;position:relative}.primary-nav a.active:before,.tool-link.active:before{content:"";width:5px;height:5px;border-radius:50%;background:#1677EE;margin-right:6px}.nav-tools{display:flex;align-items:center;gap:2px;white-space:nowrap}.icon-button,.mobile-icon,.panel-close{border:0;background:transparent}.mobile-nav{display:none;height:62px;align-items:center;justify-content:space-between}.mobile-icon{width:44px;height:44px;border-radius:12px;color:#16243A;font-size:22px}.mobile-logo-slot{width:112px;height:34px;border-radius:10px}.mobile-logo-slot img{width:100%;height:100%;object-fit:contain}.section{padding:76px 0}.section.soft{background:#F7FAFF}.section.blue-soft{background:#EDF5FF}.section.dark{background:#0A315E;color:#DCEEFF}.section.dark h1,.section.dark h2,.section.dark h3{color:#fff}.section-head{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:30px}.eyebrow{font-size:14px;color:#1677EE;font-weight:800;letter-spacing:.06em}.section.dark .eyebrow{color:#DCEEFF}.section h1,.section h2,.section h3{color:#16243A;line-height:1.28;margin-top:0}.section h1{font-size:clamp(36px,4vw,46px);margin-bottom:18px}.section h2{font-size:clamp(28px,3vw,34px);margin-bottom:14px}.section h3{font-size:20px;margin-bottom:8px}.lead{font-size:17px;max-width:820px;color:#4A586B}.section.dark .lead{color:#DCEEFF}.hero-banner{aspect-ratio:16/7;max-height:520px;min-height:280px;border-radius:30px;overflow:hidden;background:linear-gradient(135deg,#E5F1FF 0%,#fff 38%,#EDF5FF 70%,#CFE6FF 100%);border:1px solid rgba(22,119,238,.12);box-shadow:0 14px 40px rgba(22,119,238,.14);display:grid;place-items:center}.hero-banner img{width:100%;height:100%;object-fit:contain}.home-intro{padding:28px 0 0}.home-intro h1{font-size:clamp(42px,5vw,56px);margin:0 0 12px;color:#16243A;line-height:1.15}.home-intro p{margin:0;max-width:850px;font-size:17px}.entry-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:28px}.entry-grid a{min-height:116px;border:1px solid rgba(22,119,238,.12);border-radius:20px;padding:20px;background:#fff;box-shadow:0 12px 34px rgba(30,72,120,.08);display:flex;flex-direction:column;justify-content:space-between}.entry-grid strong{font-size:19px;color:#16243A}.entry-grid span{font-size:14px;color:#6B7787}.editorial-grid{display:grid;grid-template-columns:1.4fr .8fr .8fr;gap:18px}.editorial-card{padding:26px;border-radius:24px;background:#fff;border:1px solid rgba(22,119,238,.12);box-shadow:0 12px 34px rgba(30,72,120,.08)}.editorial-card.featured{grid-row:span 2;min-height:360px;background:linear-gradient(150deg,#E5F1FF,#fff)}.editorial-card.short{padding:18px;min-height:130px}.city-feature{display:grid;grid-template-columns:55fr 45fr;gap:34px;align-items:center}.city-feature-image{aspect-ratio:4/3;border-radius:26px;overflow:hidden;background:linear-gradient(135deg,#E5F1FF,#fff);border:1px solid rgba(22,119,238,.12)}.city-feature-image img{width:100%;height:100%;object-fit:cover}.time-board{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.time-item{border-top:4px solid #1677EE;padding:18px;background:#fff;border-radius:0 0 18px 18px}.route-strip{display:grid;grid-template-columns:repeat(6,1fr);gap:12px;counter-reset:route}.route-stop{position:relative;padding:18px 16px 18px 42px;background:#fff;border:1px solid rgba(22,119,238,.12);border-radius:18px}.route-stop:before{counter-increment:route;content:counter(route);position:absolute;left:14px;top:18px;width:20px;height:20px;border-radius:50%;background:#1677EE;color:#fff;display:grid;place-items:center;font-size:12px}.interest-cloud{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}.interest-cloud a{min-height:96px;padding:16px;border-radius:18px;background:#fff;border:1px solid rgba(22,119,238,.12);display:flex;align-items:end;font-size:16px;font-weight:700;color:#16243A}.qa-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.qa-item{padding:22px;border-radius:20px;background:#fff;border:1px solid rgba(22,119,238,.12)}.story-lead{display:grid;grid-template-columns:1.2fr .8fr;gap:24px}.story-main{padding:30px;border-radius:28px;background:#fff;border:1px solid rgba(22,119,238,.12)}.story-side{display:grid;gap:14px}.story-side article{padding:18px;border-radius:18px;background:#EDF5FF}.topic-list{display:grid;gap:14px}.topic-question{padding:24px 26px;border-left:5px solid #1677EE;background:#fff;border-radius:0 20px 20px 0;border-top:1px solid rgba(22,119,238,.12);border-right:1px solid rgba(22,119,238,.12);border-bottom:1px solid rgba(22,119,238,.12)}.topic-question h2,.topic-question h3{margin-bottom:6px}.guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.guide-card{padding:24px;border-radius:22px;background:#fff;border:1px solid rgba(22,119,238,.12)}.album-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:16px}.media-slot{min-height:180px;border-radius:22px;background:linear-gradient(145deg,#E5F1FF,#fff 72%);border:1px solid rgba(22,119,238,.12);overflow:hidden}.media-slot.wide{grid-column:span 12;aspect-ratio:16/7}.media-slot.medium{grid-column:span 6;aspect-ratio:4/3}.media-slot.small{grid-column:span 4;aspect-ratio:4/3}.media-slot figcaption{padding:16px;color:#4A586B}.pulse-stream{display:grid;gap:12px}.pulse-item{display:grid;grid-template-columns:180px 1fr;gap:20px;padding:20px 0;border-bottom:1px solid rgba(22,119,238,.12)}.principle-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.principle{padding:24px;border-radius:22px;background:#fff;border:1px solid rgba(22,119,238,.12)}.app-showcase{display:grid;grid-template-columns:55fr 45fr;align-items:center;gap:44px}.app-preview-image{display:grid;place-items:center;min-height:440px;max-height:520px;border-radius:30px;background:linear-gradient(145deg,#E5F1FF,#fff);border:1px solid rgba(22,119,238,.12);overflow:hidden}.app-preview-image img{max-height:520px;width:100%;height:100%;object-fit:contain}.app-icon{width:72px;height:72px;border-radius:20px;background:#fff;border:1px solid rgba(22,119,238,.12);padding:8px;margin-bottom:20px}.app-icon img{width:100%;height:100%;object-fit:contain}.check-list{display:grid;gap:12px}.check-row{padding:18px 20px;background:#fff;border:1px solid rgba(22,119,238,.12);border-radius:18px}.long-read{max-width:820px}.long-read section{padding:26px 0;border-bottom:1px solid rgba(22,119,238,.12)}.long-read p{margin:0 0 14px}.chapter-nav{position:sticky;top:96px;align-self:start;padding:20px;border-radius:20px;background:#EDF5FF}.split-read{display:grid;grid-template-columns:260px minmax(0,820px);gap:44px;justify-content:center}.faq-list{max-width:900px}.faq-list details{background:#fff;border:1px solid rgba(22,119,238,.12);border-radius:18px;padding:0 20px;margin-bottom:12px}.faq-list summary{cursor:pointer;padding:18px 0;color:#16243A;font-weight:700}.faq-list p{padding:0 0 18px;margin:0}.link-pills{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}.link-pills a{min-height:44px;display:inline-flex;align-items:center;padding:0 15px;border-radius:999px;background:#EDF5FF;color:#075FC6;font-weight:700}.safety-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.safety-item{padding:20px;border:1px solid rgba(255,255,255,.12);border-radius:18px;background:rgba(255,255,255,.06)}.privacy-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.privacy-item{padding:22px;border:1px solid rgba(22,119,238,.12);border-radius:20px;background:#fff}.channel-drawer,.search-panel{position:fixed;z-index:210;left:0;right:0;top:74px;background:#fff;box-shadow:0 22px 60px rgba(7,29,55,.18);visibility:hidden;opacity:0;pointer-events:none;transform:translateY(-10px);transition:.2s ease;max-height:calc(100vh - 74px);overflow:auto}.channel-drawer.is-open,.search-panel.is-open{visibility:visible;opacity:1;pointer-events:auto;transform:none}.panel-overlay{position:fixed;inset:74px 0 0;z-index:200;background:rgba(7,29,55,.38);visibility:hidden;opacity:0;pointer-events:none;transition:.2s}.panel-overlay.is-open{visibility:visible;opacity:1;pointer-events:auto}.drawer-head,.search-heading{display:flex;justify-content:space-between;align-items:center;gap:20px;padding-top:24px}.drawer-brand{display:flex;align-items:center;gap:12px}.drawer-brand strong{display:block;color:#16243A;font-size:20px}.drawer-brand small{color:#6B7787}.drawer-logo-slot{width:52px;height:52px;border-radius:16px}.drawer-logo-slot img{width:100%;height:100%;object-fit:contain}.panel-close{min-width:64px;min-height:44px;border-radius:12px;background:#EDF5FF;color:#075FC6}.drawer-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:28px;padding-top:24px;padding-bottom:34px}.drawer-grid h2{font-size:16px;color:#16243A}.drawer-grid a{display:block;min-height:42px;padding:8px 0;color:#4A586B}.drawer-grid a:hover,.drawer-grid a:focus-visible{color:#1677EE;outline:none}.search-inner{padding-bottom:32px}.search-heading strong{font-size:24px;color:#16243A}.search-heading p{margin:4px 0 0}.search-form{display:grid;grid-template-columns:1fr auto;gap:10px;margin-top:22px}.search-form input{min-height:52px;border:1px solid rgba(22,119,238,.22);border-radius:14px;padding:0 16px;outline:none}.search-form input:focus{border-color:#1677EE;box-shadow:0 0 0 3px rgba(22,119,238,.12)}.search-form button{min-height:52px;border:0;border-radius:14px;padding:0 22px;background:linear-gradient(135deg,#3998FF 0%,#1677EE 55%,#075FC6 100%);color:#fff}.search-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}.search-links a{padding:9px 14px;border-radius:999px;background:#F7FAFF;color:#075FC6}.site-footer{background:#071D37;color:#DCEEFF;border-top:1px solid rgba(220,238,255,.35);padding:54px 0 24px}.footer-inner{display:grid;grid-template-columns:1.1fr 2fr;gap:54px}.footer-brand{max-width:400px}.footer-brand>div{display:flex;align-items:center;gap:12px}.footer-logo-slot{width:54px;height:54px;border-radius:16px}.footer-logo-slot img{width:100%;height:100%;object-fit:contain}.footer-brand strong{display:block;color:#fff;font-size:21px}.footer-brand span{display:block;color:#DCEEFF;font-size:13px}.footer-brand p{color:#DCEEFF}.footer-links{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}.footer-links h2{font-size:15px;color:#fff}.footer-links a{display:block;padding:5px 0;color:#DCEEFF}.footer-links a:hover,.footer-links a:focus-visible{color:#fff;text-decoration:underline}.footer-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid rgba(255,255,255,.12);padding-top:20px;margin-top:34px;font-size:13px;color:#DCEEFF}.mobile-bottom{display:none}.page-kicker{padding-top:56px}.page-kicker .wrap{max-width:900px}.page-kicker h1{font-size:clamp(36px,4vw,46px);color:#16243A;line-height:1.18;margin:0 0 14px}.page-kicker p{font-size:17px;margin:0}.mosaic{display:grid;grid-template-columns:repeat(12,1fr);gap:16px}.mosaic article{grid-column:span 4;padding:22px;border:1px solid rgba(22,119,238,.12);border-radius:22px;background:#fff}.mosaic article:nth-child(1){grid-column:span 7}.mosaic article:nth-child(2){grid-column:span 5}.magazine-row{display:grid;grid-template-columns:1fr 1fr;gap:22px}.magazine-row article{padding:24px 0;border-top:2px solid #1677EE}.timeline{position:relative;display:grid;gap:18px}.timeline:before{content:"";position:absolute;left:17px;top:8px;bottom:8px;width:2px;background:#CFE6FF}.timeline article{position:relative;padding-left:56px}.timeline article:before{content:"";position:absolute;left:10px;top:8px;width:16px;height:16px;border-radius:50%;background:#1677EE;border:4px solid #EDF5FF}.index-wall{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}.index-wall article{min-height:180px;padding:20px;background:#fff;border-radius:20px;border:1px solid rgba(22,119,238,.12)}.article-stack{max-width:900px;display:grid;gap:26px}.article-stack article{padding-bottom:26px;border-bottom:1px solid rgba(22,119,238,.12)}.article-stack h2{font-size:26px}.callout{padding:22px;border-radius:20px;background:#EDF5FF;border:1px solid rgba(22,119,238,.12);margin:24px 0}.mini-note{font-size:14px;color:#6B7787}.text-columns{columns:2;column-gap:42px}.text-columns p{break-inside:avoid;margin-top:0}.home-section-copy{max-width:900px}.home-section-copy p{margin-bottom:0}
@media(max-width:1180px){.primary-nav a,.tool-link,.icon-button{padding-inline:9px;font-size:14px}.desktop-nav{gap:10px}.editorial-grid{grid-template-columns:1.2fr 1fr}.editorial-card.featured{grid-row:auto;grid-column:span 2}.route-strip{grid-template-columns:repeat(3,1fr)}.interest-cloud{grid-template-columns:repeat(4,1fr)}.index-wall{grid-template-columns:repeat(4,1fr)}}
@media(max-width:900px){.desktop-nav{display:none}.mobile-nav{display:flex}.site-header{height:62px}.channel-drawer,.search-panel{top:62px;bottom:0;max-height:none}.panel-overlay{inset:62px 0 0}.drawer-grid{grid-template-columns:repeat(2,1fr)}.entry-grid{grid-template-columns:repeat(2,1fr)}.editorial-grid{grid-template-columns:1fr 1fr}.city-feature,.app-showcase,.story-lead{grid-template-columns:1fr}.city-feature-image{order:-1}.app-preview-image{order:-1;min-height:380px}.time-board{grid-template-columns:repeat(2,1fr)}.interest-cloud{grid-template-columns:repeat(3,1fr)}.guide-grid,.safety-grid{grid-template-columns:repeat(2,1fr)}.mosaic article,.mosaic article:nth-child(1),.mosaic article:nth-child(2){grid-column:span 6}.index-wall{grid-template-columns:repeat(3,1fr)}.split-read{grid-template-columns:1fr}.chapter-nav{position:static}.footer-inner{grid-template-columns:1fr}.footer-brand{max-width:620px}}
@media(max-width:767px){.shell{width:min(100% - 32px,1320px)}body{padding-bottom:58px}.section{padding:56px 0}.page-kicker{padding-top:38px}.section h1,.page-kicker h1{font-size:clamp(28px,9vw,34px)}.section h2{font-size:clamp(24px,7vw,28px)}.section h3{font-size:19px}.lead,.page-kicker p{font-size:16px}.hero-banner{aspect-ratio:16/10;min-height:0;border-radius:20px}.home-intro h1{font-size:clamp(30px,10vw,38px)}.entry-grid,.qa-grid,.principle-grid,.privacy-grid{grid-template-columns:1fr}.editorial-grid{grid-template-columns:1fr}.editorial-card.featured{grid-column:auto;min-height:260px}.route-strip{grid-template-columns:1fr 1fr}.interest-cloud{grid-template-columns:1fr 1fr}.guide-grid,.safety-grid{grid-template-columns:1fr}.album-grid{gap:12px}.media-slot.wide,.media-slot.medium,.media-slot.small{grid-column:span 12}.pulse-item{grid-template-columns:1fr;gap:4px}.app-preview-image{min-height:320px}.app-preview-image img{max-width:320px}.mosaic article,.mosaic article:nth-child(1),.mosaic article:nth-child(2){grid-column:span 12}.magazine-row{grid-template-columns:1fr}.index-wall{grid-template-columns:1fr 1fr}.footer-links{grid-template-columns:1fr 1fr}.footer-bottom{flex-direction:column}.mobile-bottom{position:fixed;left:0;right:0;bottom:0;z-index:130;height:calc(58px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);display:grid;grid-template-columns:repeat(5,1fr);background:#fff;border-top:1px solid rgba(22,119,238,.12)}.mobile-bottom a{min-height:54px;display:grid;place-items:center;font-size:13px;color:#4A586B}.drawer-grid{grid-template-columns:1fr 1fr;gap:16px}.search-form{grid-template-columns:1fr}.text-columns{columns:1}}
@media(max-width:560px){.shell{width:min(100% - 24px,1320px)}.entry-grid,.time-board,.route-strip,.interest-cloud,.index-wall{grid-template-columns:1fr}.drawer-grid{grid-template-columns:1fr}.footer-links{grid-template-columns:1fr 1fr}.section{padding:48px 0}.editorial-card,.guide-card,.qa-item,.principle{padding:20px}.search-heading{align-items:flex-start}.search-heading p{font-size:14px}.app-preview-image{min-height:280px}.mobile-logo-slot{width:104px}}