:root{--blue:#1677EE;--bright:#3395FF;--deep:#0A315E;--dark:#071D37;--ink:#16243A;--text:#3C485A;--muted:#6B7787;--line:rgba(22,119,238,.12);--soft:#F7FAFF;--pale:#EDF5FF;--radius:22px;--shadow:0 12px 34px rgba(30,72,120,.08)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Arial,"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:22px}.brand,.mobile-brand{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:800;white-space:nowrap}.brand img{width:38px;height:38px;object-fit:contain}.main-nav{display:flex;align-items:center;gap:6px;flex:1;min-width:0;white-space:nowrap}.main-nav a,.nav-actions a,.icon-btn{min-height:44px;padding:10px 12px;border-radius:13px;display:inline-flex;align-items:center;justify-content:center}.main-nav a.active{color:var(--blue);background:var(--pale);position:relative}.main-nav a.active:before{content:"";width:6px;height:6px;border-radius:50%;background:var(--blue);margin-right:6px}.nav-actions{display:flex;align-items:center;gap:4px}.icon-btn{border:0;background:transparent;color:var(--ink);cursor:pointer}.app-pill{background:linear-gradient(135deg,#3998FF,#1677EE 55%,#075FC6);color:#fff!important}.mobile-head{display:none;height:62px;align-items:center;justify-content:space-between;padding:0 14px}.mobile-brand img{width:30px;height:30px;object-fit:contain}.mobile-brand span{font-size:15px}.hero-banner{width:min(1320px,calc(100% - 40px));margin:28px auto 0;aspect-ratio:16/7;max-height:520px;border-radius:30px;overflow:hidden;background:linear-gradient(135deg,#E5F1FF,#fff 45%,#BBDFFF);position:relative;box-shadow:var(--shadow)}.hero-banner img{width:100%;height:100%;object-fit:contain}.hero-copy{position:absolute;left:5%;bottom:10%;max-width:520px;padding:24px 28px;background:rgba(7,29,55,.82);color:#fff;border-radius:20px}.hero-copy h1{font-size:clamp(42px,4vw,56px);line-height:1.12;margin:0 0 10px}.hero-copy p{margin:0;color:#DCEEFF}.quick-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:18px auto 0}.quick-grid a{padding:18px;border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:var(--shadow);font-weight:700;color:var(--ink)}.section{padding:72px 0}.section.alt{background:var(--soft)}.section.blue{background:var(--deep);color:#DCEEFF}.section.blue h2,.section.blue h3{color:#fff}.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:28px}.section-head h2{margin:0;color:var(--ink);font-size:clamp(28px,3vw,34px);line-height:1.25}.section-head p{margin:0;max-width:620px;color:var(--muted)}.blue .section-head p{color:#DCEEFF}.editorial-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:18px}.feature-card,.content-card,.topic-card,.guide-card,.story-card,.info-card{border:1px solid var(--line);border-radius:var(--radius);padding:24px;background:#fff;box-shadow:var(--shadow)}.feature-card{grid-row:span 2;background:linear-gradient(145deg,#EDF5FF,#fff)}.feature-card h3,.content-card h3,.topic-card h3,.guide-card h3,.story-card h3,.info-card h3{color:var(--ink);margin-top:0}.city-feature,.app-feature{display:grid;grid-template-columns:1.2fr 1fr;gap:32px;align-items:center}.city-feature-image,.app-preview-image{min-height:320px;border-radius:26px;overflow:hidden;background:linear-gradient(135deg,#E5F1FF,#fff);border:1px solid var(--line)}.city-feature-image img{width:100%;height:100%;object-fit:cover}.app-preview-image{display:flex;align-items:center;justify-content:center}.app-preview-image img{max-height:520px;object-fit:contain}.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.time-box{padding:22px;border-top:4px solid var(--blue);background:#fff;border-radius:16px;box-shadow:var(--shadow)}.route{display:grid;grid-template-columns:repeat(6,1fr);gap:10px}.route div{padding:18px 12px;text-align:center;border-radius:16px;background:var(--pale);color:var(--ink);font-weight:700}.interest-wall{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}.interest-wall a{min-height:74px;display:flex;align-items:center;justify-content:center;background:#fff;border:1px solid var(--line);border-radius:18px;font-size:16px;font-weight:700;color:var(--ink)}.q-grid,.guide-grid,.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.story-layout{display:grid;grid-template-columns:1.6fr 1fr;gap:20px}.story-main{padding:28px;background:#fff;border-radius:24px;border:1px solid var(--line);box-shadow:var(--shadow)}.story-side{display:grid;gap:14px}.media-layout{display:grid;grid-template-columns:2fr 1fr 1fr;gap:14px}.media-slot{min-height:180px;border-radius:20px;background:linear-gradient(145deg,#DCEEFF,#fff);border:1px solid var(--line)}.media-slot.wide{grid-row:span 2;min-height:380px}.pulse-list{display:grid;gap:10px}.pulse-item{padding:16px 18px;border-left:4px solid var(--blue);background:#fff;border-radius:0 14px 14px 0}.page-hero{padding:68px 0 38px;background:linear-gradient(180deg,#EDF5FF,#fff)}.page-hero h1{margin:0 0 12px;font-size:clamp(36px,4vw,46px);line-height:1.2;color:var(--ink)}.page-hero p{max-width:780px;margin:0;color:var(--muted);font-size:17px}.article-wrap{width:min(820px,calc(100% - 40px));margin:auto}.article-wrap h2{color:var(--ink);font-size:28px;margin-top:48px}.article-wrap h3{color:var(--ink);font-size:21px;margin-top:30px}.article-wrap p{margin:14px 0}.article-wrap ul{padding-left:22px}.magazine-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:24px}.index-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.index-item{padding:22px;border-radius:18px;background:#fff;border:1px solid var(--line)}.faq-list details{border:1px solid var(--line);border-radius:16px;background:#fff;padding:16px 18px;margin:12px 0}.faq-list summary{cursor:pointer;color:var(--ink);font-weight:800}.deep-box{background:var(--deep);color:#DCEEFF;padding:26px;border-radius:22px}.deep-box h2,.deep-box h3{color:#fff}.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}.btn{min-height:44px;padding:11px 18px;border-radius:14px;background:linear-gradient(135deg,#3998FF,#1677EE 55%,#075FC6);color:#fff;font-weight:700;display:inline-flex;align-items:center;justify-content:center}.btn.secondary{background:#fff;color:var(--blue);border:1px solid var(--line)}.mega-panel,.search-panel{position:fixed;z-index:80;top:0;right:0;height:100dvh;background:#fff;box-shadow:-20px 0 50px rgba(7,29,55,.18);transform:translateX(103%);visibility:hidden;pointer-events:none;transition:.24s ease}.mega-panel{width:min(900px,94vw);padding:24px}.search-panel{width:min(480px,94vw);padding:24px}.mega-panel.open,.search-panel.open{transform:none;visibility:visible;pointer-events:auto}.overlay{position:fixed;inset:0;background:rgba(7,29,55,.46);z-index:70;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.overlay.open{opacity:1;visibility:visible;pointer-events:auto}.panel-top{display:flex;justify-content:space-between;align-items:center;padding-bottom:18px;border-bottom:1px solid var(--line)}.panel-brand{display:flex;gap:12px;align-items:center}.panel-brand img{width:40px;height:40px;object-fit:contain}.panel-brand div{display:flex;flex-direction:column}.panel-brand span{font-size:12px;color:var(--muted)}.close-btn{min-height:44px;border:0;border-radius:12px;background:var(--pale);padding:8px 14px;cursor:pointer}.mega-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:18px;padding-top:22px}.mega-grid section{display:flex;flex-direction:column;gap:8px}.mega-grid h2{font-size:16px;color:var(--ink)}.mega-grid a,.search-links a{min-height:44px;display:flex;align-items:center;border-radius:10px;padding:6px 8px}.mega-grid a:hover,.search-links a:hover{background:var(--pale);color:var(--blue)}.search-links{display:grid;grid-template-columns:1fr 1fr;gap:8px}.site-footer{background:var(--dark);color:#DCEEFF;border-top:1px solid rgba(51,149,255,.45);padding:54px 0 90px}.footer-grid{display:grid;grid-template-columns:2fr repeat(4,1fr);gap:28px}.footer-grid>div{display:flex;flex-direction:column;gap:8px}.footer-grid h2{font-size:16px;color:#fff;margin:0 0 8px}.footer-grid a{color:#DCEEFF}.footer-brand img{width:44px;height:44px;object-fit:contain}.footer-brand strong{font-size:20px;color:#fff}.footer-brand span{font-size:12px}.footer-brand p{max-width:420px}.copyright{margin-top:28px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);font-size:13px}.mobile-bottom{display:none}.visual-slot{min-height:260px;border-radius:24px;background:linear-gradient(135deg,#E5F1FF,#fff);border:1px solid var(--line);overflow:hidden}.visual-slot img{width:100%;height:100%;object-fit:contain}
@media(max-width:1100px){.main-nav a{padding:10px 8px;font-size:14px}.nav-actions a,.icon-btn{padding:10px 8px}.editorial-grid{grid-template-columns:1.5fr 1fr}.editorial-grid>*:nth-child(n+4){grid-column:auto}.q-grid,.guide-grid,.topic-grid{grid-template-columns:repeat(2,1fr)}.interest-wall{grid-template-columns:repeat(4,1fr)}.route{grid-template-columns:repeat(3,1fr)}.footer-grid{grid-template-columns:2fr repeat(2,1fr)}}
@media(max-width:820px){.desktop-nav{display:none}.mobile-head{display:flex}.site-header{position:sticky}.shell{width:min(100% - 28px,1320px)}.hero-banner{width:calc(100% - 28px);margin-top:16px;aspect-ratio:16/10;border-radius:22px}.hero-copy{left:5%;right:5%;bottom:6%;max-width:none;padding:18px}.hero-copy h1{font-size:clamp(30px,8vw,38px)}.quick-grid{grid-template-columns:1fr 1fr;width:calc(100% - 28px)}.section{padding:52px 0}.section-head{display:block}.section-head p{margin-top:8px}.editorial-grid,.city-feature,.app-feature,.story-layout,.magazine-grid{grid-template-columns:1fr}.timeline{grid-template-columns:1fr 1fr}.interest-wall{grid-template-columns:repeat(2,1fr)}.q-grid,.guide-grid,.topic-grid,.index-grid{grid-template-columns:1fr}.media-layout{grid-template-columns:1fr 1fr}.media-slot.wide{grid-column:1/-1;grid-row:auto;min-height:260px}.mega-grid{grid-template-columns:1fr 1fr;height:calc(100dvh - 90px);overflow:auto}.footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}.mobile-bottom{display:grid;grid-template-columns:repeat(5,1fr);position:fixed;z-index:45;left:0;right:0;bottom:0;min-height:58px;padding-bottom:env(safe-area-inset-bottom);background:#fff;border-top:1px solid var(--line)}.mobile-bottom a{min-height:54px;display:flex;align-items:center;justify-content:center;color:var(--ink);font-size:13px}.site-footer{padding-bottom:110px}.article-wrap{width:calc(100% - 28px)}.page-hero{padding:48px 0 28px}.page-hero h1{font-size:clamp(28px,8vw,34px)}}
@media(max-width:560px){.quick-grid,.timeline,.media-layout,.footer-grid{grid-template-columns:1fr}.route{grid-template-columns:1fr 1fr}.hero-copy p{font-size:14px}.hero-copy{padding:14px}.city-feature-image{min-height:230px}.app-preview-image img{max-width:320px}.mega-grid{grid-template-columns:1fr 1fr;gap:12px}.section{padding:44px 0}}
:focus-visible{outline:3px solid rgba(22,119,238,.32);outline-offset:2px}