:root{--blue:#1677EE;--blue2:#3395FF;--deep:#0A315E;--footer:#071D37;--ink:#16243A;--text:#3C485A;--muted:#6B7787;--soft:#F7FAFF;--ice:#EDF5FF;--line:rgba(22,119,238,.12);--shadow:0 12px 34px rgba(30,72,120,.08);--brand-shadow:0 14px 40px rgba(22,119,238,.14)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:system-ui,-apple-system,"Segoe UI","Microsoft YaHei",sans-serif;color:var(--text);background:#fff;line-height:1.75;overflow-x:hidden}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}button{font:inherit}.shell{width:min(1320px,calc(100% - 40px));margin:auto}.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}.desktop-nav{height:74px;display:flex;align-items:center;gap:24px}.brand{display:flex;align-items:center;gap:10px;flex:none}.brand img{width:38px;height:38px;object-fit:contain}.brand span{display:grid;line-height:1.15;color:var(--ink)}.brand small{font-size:10px;letter-spacing:1.4px;color:var(--muted);margin-top:4px}.main-links{display:flex;gap:4px;flex:1;justify-content:center;white-space:nowrap}.main-links a,.nav-actions>a,.icon-btn{min-height:44px;display:inline-flex;align-items:center;justify-content:center;padding:0 13px;border-radius:12px;border:0;background:transparent;color:#26364D;cursor:pointer}.main-links a.active{background:var(--ice);color:var(--blue);position:relative}.main-links a.active:after{content:"";width:6px;height:6px;border-radius:50%;background:var(--blue);position:absolute;bottom:6px}.nav-actions{display:flex;align-items:center;gap:2px;white-space:nowrap}.app-link{color:#fff!important;background:linear-gradient(135deg,#3998FF 0%,#1677EE 55%,#075FC6 100%)}.mobile-nav{display:none;height:62px;align-items:center;justify-content:space-between;padding:0 14px}.mobile-brand{display:flex;align-items:center;gap:8px;font-weight:700;color:var(--ink)}.mobile-brand img{height:30px;width:auto;object-fit:contain}main{min-height:60vh}.section{padding:72px 0}.section.alt{background:var(--soft)}.section.blue{background:var(--deep);color:#DCEEFF}.section.blue h2,.section.blue h3,.section.blue .eyebrow{color:#fff}.eyebrow{font-size:14px;color:var(--blue);font-weight:700;letter-spacing:.06em}.section-title{font-size:clamp(28px,3vw,34px);color:var(--ink);margin:8px 0 14px;line-height:1.25}.lead{font-size:17px;max-width:820px;color:#4A586B}.hero{padding:34px 0 24px}.hero-banner{aspect-ratio:16/7;max-height:520px;border-radius:28px;overflow:hidden;background:linear-gradient(135deg,#E5F1FF,#fff 50%,#BBD9FF);position:relative;box-shadow:var(--brand-shadow)}.hero-banner img{width:100%;height:100%;object-fit:contain}.hero-overlay{position:absolute;left:5%;bottom:8%;max-width:560px;padding:24px;border-radius:20px;background:rgba(10,49,94,.82);color:#fff}.hero-overlay h1{font-size:clamp(42px,5vw,56px);line-height:1.05;margin:0 0 12px}.hero-overlay p{margin:0;color:#DCEEFF}.quick-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:16px}.quick-grid a{padding:18px;border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:var(--shadow)}.quick-grid strong{display:block;color:var(--ink);font-size:18px}.editorial-grid{display:grid;grid-template-columns:1.35fr .9fr .9fr;grid-template-rows:auto auto;gap:18px}.feature-card,.content-card,.soft-card{border:1px solid var(--line);border-radius:22px;background:#fff;padding:24px;box-shadow:var(--shadow)}.feature-card{grid-row:span 2;background:linear-gradient(160deg,#F7FAFF,#EDF5FF)}.feature-card h3{font-size:28px;color:var(--ink);margin:8px 0}.content-card h3,.soft-card h3{font-size:20px;color:var(--ink);margin:4px 0 8px}.short-row{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:18px}.short-row article{padding:18px;border-top:3px solid var(--blue);background:#fff;border-radius:0 0 16px 16px}.split{display:grid;grid-template-columns:1.15fr .85fr;gap:42px;align-items:center}.city-feature-image,.app-preview-image,.media-slot,.image-slot{background:linear-gradient(145deg,#EDF5FF,#fff);border:1px solid var(--line);border-radius:24px;overflow:hidden;min-height:260px}.city-feature-image{aspect-ratio:4/3}.city-feature-image img,.app-preview-image img,.image-slot img{width:100%;height:100%;object-fit:cover}.app-preview-image{display:flex;align-items:center;justify-content:center;max-height:520px;min-height:420px}.app-preview-image img{object-fit:contain;max-height:520px}.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.timeline .soft-card b{display:inline-block;color:var(--blue);margin-bottom:8px}.route{display:grid;grid-template-columns:repeat(6,1fr);gap:12px}.route div{padding:18px 14px;border-radius:18px;background:#fff;border:1px solid var(--line);text-align:center}.chips{display:flex;flex-wrap:wrap;gap:10px}.chips a,.chips span{font-size:16px;padding:11px 15px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#26364D}.qa-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.qa-list article{padding:22px;border-left:4px solid var(--blue);background:#fff;border-radius:0 18px 18px 0}.story-layout{display:grid;grid-template-columns:1.2fr .8fr;gap:26px}.story-main{padding:30px;border-radius:24px;background:#fff;border:1px solid var(--line)}.story-side{display:grid;gap:14px}.topic-list,.guide-list,.pulse-list{display:grid;gap:12px}.topic-list a,.guide-list article,.pulse-list div{padding:18px 20px;border:1px solid var(--line);border-radius:16px;background:#fff}.album-grid{display:grid;grid-template-columns:2fr 1fr 1fr;grid-auto-rows:180px;gap:14px}.media-slot{min-height:0}.media-slot.large{grid-row:span 2}.media-slot.medium{grid-row:span 1}.media-slot.small{grid-row:span 1}.app-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:20px}.btn{display:inline-flex;min-height:46px;align-items:center;justify-content:center;padding:0 20px;border-radius:14px;background:linear-gradient(135deg,#3998FF 0%,#1677EE 55%,#075FC6 100%);color:#fff;font-weight:700}.btn.alt{background:#fff;color:var(--blue);border:1px solid var(--line)}.page-hero{padding:72px 0 42px;background:linear-gradient(180deg,#F7FAFF,#fff)}.page-hero h1{font-size:clamp(36px,4vw,46px);color:var(--ink);line-height:1.18;margin:8px 0 14px}.article-wrap{width:min(820px,calc(100% - 40px));margin:auto}.article-wrap h2{font-size:28px;color:var(--ink);margin-top:38px}.article-wrap h3{font-size:20px;color:var(--ink);margin-top:26px}.article-wrap p{margin:12px 0}.index-wall{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.index-wall article{padding:22px;border:1px solid var(--line);border-radius:18px;background:#fff}.index-wall h3{margin:0 0 8px;color:var(--ink)}details{border:1px solid 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rgba(22,119,238,.35);outline-offset:2px}
@media (max-width:1100px){.main-links a{padding:0 8px}.desktop-nav{gap:12px}.footer-grid{grid-template-columns:2fr repeat(2,1fr)}.mega-grid{grid-template-columns:repeat(3,1fr)}.editorial-grid{grid-template-columns:1fr 1fr}.feature-card{grid-column:1/-1;grid-row:auto}.route{grid-template-columns:repeat(3,1fr)}}
@media (max-width:767px){.shell{width:min(100% - 28px,1320px)}.desktop-nav{display:none}.mobile-nav{display:flex}.site-header{height:62px}.section{padding:52px 0}.hero{padding-top:18px}.hero-banner{aspect-ratio:16/10;border-radius:20px}.hero-overlay{left:4%;right:4%;bottom:5%;padding:16px;max-width:none}.hero-overlay h1{font-size:clamp(30px,9vw,38px)}.hero-overlay p{font-size:14px}.quick-grid,.timeline,.qa-list,.index-wall{grid-template-columns:1fr}.editorial-grid,.story-layout,.split{grid-template-columns:1fr}.short-row{grid-template-columns:1fr}.route{grid-template-columns:repeat(2,1fr)}.album-grid{grid-template-columns:1fr 1fr;grid-auto-rows:150px}.media-slot.large{grid-column:1/-1}.app-preview-image{min-height:320px}.app-preview-image img{max-width:320px}.page-hero{padding:46px 0 26px}.page-hero h1{font-size:clamp(28px,9vw,34px)}.footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}.mobile-bottom{position:fixed;z-index:45;left:0;right:0;bottom:0;display:grid;grid-template-columns:repeat(5,1fr);min-height:58px;padding-bottom:env(safe-area-inset-bottom);background:rgba(255,255,255,.97);border-top:1px solid var(--line)}.mobile-bottom a{min-height:54px;display:flex;align-items:center;justify-content:center;color:#26364D;font-size:14px}.site-footer{padding-bottom:90px}.mega-panel{inset:0;width:100%;height:100vh;transform:none!important;border-radius:0;overflow:auto;top:0;left:0}.mega-grid{grid-template-columns:1fr 1fr}.search-panel{width:100%}body.panel-open{overflow:hidden}}
@media (max-width:560px){.footer-grid,.mega-grid,.search-links{grid-template-columns:1fr}.album-grid{grid-template-columns:1fr;grid-auto-rows:190px}.media-slot.large{grid-column:auto;grid-row:span 1}.route{grid-template-columns:1fr}.section-title{font-size:24px}.content-card,.soft-card,.feature-card{padding:19px}}