:root{--blue:#1478F2;--blue2:#2F8CFF;--deep:#075DC9;--navy:#0B1F38;--ink:#172033;--text:#3E4859;--muted:#6F7A89;--soft:#98A1AF;--pale:#EDF5FF;--wash:#F7FAFF;--gray:#F5F6F8;--line:rgba(20,120,242,.12);--gline:rgba(30,50,70,.08);--shadow:0 14px 38px rgba(21,67,118,.08);--bshadow:0 16px 42px rgba(20,120,242,.15);--max:1280px}
*{box-sizing:border-box}html{scroll-behavior:smooth;overflow-x:hidden}body{margin:0;background:#fff;color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.75;overflow-x:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}.shell{width:min(calc(100% - 40px),var(--max));margin-inline:auto}.skip-link{position:fixed;left:16px;top:-60px;background:#fff;color:var(--blue);padding:10px 14px;border-radius:10px;z-index:200}.skip-link:focus{top:10px}.site-header{position:sticky;top:0;z-index:80;background:rgba(255,255,255,.97);border-bottom:1px solid var(--gline);backdrop-filter:blur(12px)}.desktop-nav{height:74px;display:grid;grid-template-columns:minmax(240px,1fr) auto minmax(230px,1fr);align-items:center;gap:16px}.brand{display:flex;align-items:center;gap:10px;min-width:0}.brand-logo{display:block;max-width:150px;max-height:42px;width:auto;height:auto;object-fit:contain}.brand-text{font-size:24px;font-weight:900;color:var(--blue);white-space:nowrap}.brand-tag{display:inline-flex;padding:4px 9px;border-radius:999px;background:var(--pale);color:var(--deep);font-size:12px;white-space:nowrap}.main-nav,.nav-actions{display:flex;align-items:center;gap:3px;white-space:nowrap}.nav-actions{justify-content:flex-end}.main-nav a,.nav-action{min-height:44px;display:inline-flex;align-items:center;justify-content:center;padding:0 11px;border:0;border-radius:12px;background:transparent;color:var(--muted);font-size:14px;font-weight:700;cursor:pointer}.main-nav a:hover,.nav-action:hover,.is-current{color:var(--blue)!important;background:var(--pale)!important}.mobile-nav{display:none;height:64px;padding:0 15px;align-items:center;justify-content:space-between}.mobile-nav>a,.mobile-nav>button{min-width:52px;min-height:44px;display:flex;align-items:center;justify-content:center;border:0;background:transparent;color:var(--blue);font-weight:800}.mobile-brand{max-width:180px}.site-main{min-height:62vh}.page-hero{padding:60px 0 34px;background:linear-gradient(180deg,var(--wash),#fff)}.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font-weight:800;font-size:13px}.eyebrow:before{content:"";width:18px;height:3px;background:var(--blue);border-radius:999px}.page-hero h1,.home-copy h1{margin:12px 0 16px;color:var(--ink);font-size:clamp(34px,5vw,58px);line-height:1.12;letter-spacing:-.035em}.page-hero p{max-width:900px;margin:0;color:var(--muted);font-size:17px}.lead-note{margin-top:14px!important;padding:15px 18px;border-left:3px solid var(--blue);background:var(--pale);border-radius:0 14px 14px 0;color:var(--text)!important}.section{padding:50px 0}.section.alt{background:var(--wash)}.section-head{display:flex;justify-content:space-between;gap:20px;align-items:end;margin-bottom:24px}.section-head h2{margin:0;color:var(--ink);font-size:clamp(25px,3vw,38px);line-height:1.2}.section-head p{margin:0;max-width:650px;color:var(--muted)}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.card{padding:22px;border:1px solid var(--gline);border-radius:18px;background:#fff;box-shadow:var(--shadow)}.card h2,.card h3{margin:0 0 8px;color:var(--ink);line-height:1.35}.card p{margin:0}.pill{display:inline-flex;padding:4px 10px;border-radius:999px;background:var(--pale);color:var(--deep);font-size:12px;font-weight:800;margin-bottom:8px}.text-link{display:inline-flex;margin-top:14px;color:var(--blue);font-weight:800}.text-link:after{content:"→";margin-left:6px}.feature-list{display:grid;grid-template-columns:1fr 1fr;gap:18px}.feature-row{display:grid;grid-template-columns:68px 1fr;gap:16px;padding:20px;border-top:1px solid var(--gline)}.feature-row:first-child{border-top:0}.feature-no{font-size:32px;font-weight:900;color:#cee1f8}.feature-row h3{margin:0 0 7px;color:var(--ink)}.feature-row p{margin:0}.article-list{display:grid;gap:0}.article-item{padding:22px 0;border-bottom:1px solid var(--gline)}.article-item h2,.article-item h3{margin:0 0 8px;color:var(--ink)}.article-item p{margin:0}.topic-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.topic{padding:24px;border-radius:18px;background:var(--wash);border:1px solid var(--line)}.topic h2,.topic h3{margin:0 0 8px;color:var(--ink)}.boundary{margin-top:12px;padding-top:12px;border-top:1px dashed var(--line);font-size:13px;color:var(--muted)}.timeline{border-left:2px solid #d9eafe;margin-left:12px}.timeline article{position:relative;padding:0 0 28px 30px}.timeline article:before{content:"";position:absolute;left:-8px;top:8px;width:14px;height:14px;border-radius:50%;background:#fff;border:4px solid var(--blue)}.timeline h2,.timeline h3{margin:0 0 8px;color:var(--ink)}.masonry{columns:3;column-gap:18px}.masonry .card{break-inside:avoid;margin-bottom:18px}.tag-wall{display:flex;flex-wrap:wrap;gap:12px}.tag-card{flex:1 1 220px;min-height:150px;padding:22px;border-radius:22px;border:1px solid var(--line);background:linear-gradient(145deg,#fff,var(--pale));display:flex;flex-direction:column;justify-content:space-between}.tag-card h2,.tag-card h3{margin:0;color:var(--ink)}.qa details{border-bottom:1px solid var(--gline)}.qa summary{cursor:pointer;list-style:none;padding:19px 0;color:var(--ink);font-weight:850}.qa summary::-webkit-details-marker{display:none}.qa summary:after{content:"＋";float:right;color:var(--blue)}.qa details[open] summary:after{content:"－"}.qa p{margin:0 0 22px;max-width:930px}.notice-list{display:grid;gap:12px}.notice{display:grid;grid-template-columns:150px 1fr;gap:18px;padding:20px;border-radius:15px;background:var(--gray)}.notice>strong{color:var(--blue)}.split{display:grid;grid-template-columns:1fr 1fr;gap:22px}.panel{padding:30px;border-radius:24px;background:var(--wash);border:1px solid var(--line)}.panel h2{margin:0 0 12px;color:var(--ink)}.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;counter-reset:s}.step{counter-increment:s;padding:22px;border:1px solid var(--gline);border-radius:18px}.step:before{content:counter(s,decimal-leading-zero);display:block;font-size:30px;font-weight:900;color:#c9dcf5}.step h3{margin:6px 0;color:var(--ink)}.brand-placeholder{display:flex;align-items:center;justify-content:center;min-height:240px;border-radius:24px;border:1px solid var(--line);background:radial-gradient(circle at 30% 20%,#d9eafe,#edf5ff 45%,#fff);color:var(--deep);font-size:clamp(32px,5vw,68px);font-weight:900}.primary-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 20px;border-radius:13px;background:linear-gradient(135deg,#3A96FF 0%,#1478F2 55%,#0863D3 100%);color:#fff;font-weight:850;box-shadow:var(--bshadow)}.secondary-link{display:inline-flex;margin-left:14px;color:var(--blue);font-weight:800}.channel-strip{overflow-x:auto;border-bottom:1px solid var(--gline);background:#fff}.channel-strip .shell{display:flex;gap:24px;min-width:max-content;padding-block:13px}.channel-strip a{font-size:14px;color:var(--muted);white-space:nowrap}.channel-strip a:before{content:"";display:inline-block;width:7px;height:7px;border-radius:50%;background:#91bff7;margin-right:7px}.home-editor{padding:36px 0;background:var(--wash)}.home-grid{display:grid;grid-template-columns:1fr 1.5fr .95fr;gap:20px}.home-copy,.home-banner,.home-quick{padding:26px;border-radius:24px;background:#fff;border:1px solid var(--gline)}.home-copy p{color:var(--muted)}.home-banner{display:flex;align-items:center;justify-content:center}.home-banner img{width:100%;height:auto;max-height:400px;object-fit:contain;border-radius:18px}.home-quick h2{margin:0 0 12px;color:var(--ink)}.quick{display:block;padding:13px 0;border-bottom:1px solid var(--gline)}.quick b{display:block;color:var(--ink)}.quick span{font-size:13px;color:var(--muted)}.overview{display:grid;grid-template-columns:1.1fr .9fr 1fr 1.2fr;gap:14px}.overview article{padding:22px;border-radius:20px;background:var(--pale)}.overview h3{margin:0 0 8px;color:var(--ink)}.discussion{display:grid;grid-template-columns:1.25fr .75fr;gap:20px}.main-topic{padding:30px;border-radius:24px;background:linear-gradient(145deg,var(--pale),#fff);border:1px solid var(--line)}.main-topic h3{margin:0 0 12px;color:var(--ink);font-size:28px}.mini-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.mini{padding:18px;border:1px solid var(--gline);border-radius:16px}.mini h3{margin:0 0 6px;color:var(--ink);font-size:17px}.route{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(250px,1fr);gap:14px;overflow-x:auto;padding-bottom:8px}.route article{padding:22px;border:1px solid var(--gline);border-radius:18px;background:#fff}.story-layout{display:grid;grid-template-columns:1.35fr .65fr;gap:22px}.story-main{padding:30px;border-radius:24px;background:var(--wash)}.story-side{display:grid;gap:12px}.story-side article{padding:20px;border-radius:16px;border:1px solid var(--gline)}.app-showcase{display:grid;grid-template-columns:1fr 1fr;gap:26px;align-items:center}.app-showcase img{width:100%;height:auto;max-height:500px;object-fit:contain}.service-four{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:20px 0}.service-four div{padding:16px;border-radius:14px;background:var(--pale);color:var(--deep);font-weight:800}.manifesto{padding:56px;border-radius:28px;background:var(--navy);color:#eaf3ff}.manifesto h2{margin:0 0 14px;color:#fff;font-size:clamp(28px,4vw,46px)}.site-footer{background:var(--navy);color:#eaf3ff;padding:54px 0 calc(30px + env(safe-area-inset-bottom))}.footer-grid{display:grid;grid-template-columns:1.15fr 2fr;gap:46px}.footer-brand strong{display:block;margin-top:10px;letter-spacing:.12em}.footer-brand p{color:#c8d9ed}.footer-links{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}.footer-links h2{font-size:15px;color:#fff;margin:0 0 12px}.footer-links a{display:block;color:#c8d9ed;font-size:14px;margin:8px 0}.footer-note{margin-top:30px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);color:#b9cce2;font-size:14px}.copyright{margin-top:12px;color:#87a2c0;font-size:13px}.mobile-bottom{display:none}.overlay{position:fixed;inset:0;z-index:90;background:rgba(11,31,56,.42);opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}.mega-menu,.search-panel{position:fixed;left:0;right:0;top:74px;z-index:100;background:#fff;max-height:calc(100vh - 74px);overflow:auto;box-shadow:0 22px 52px rgba(11,31,56,.16);visibility:hidden;pointer-events:none;opacity:0;transform:translateY(-12px);transition:.2s}.mega-menu.is-open,.search-panel.is-open{visibility:visible;pointer-events:auto;opacity:1;transform:none}.mega-menu{padding:24px max(20px,calc((100vw - 1280px)/2)) 34px}.menu-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.menu-head strong{font-size:22px;color:var(--ink)}.menu-head button{min-height:44px;border:0;border-radius:12px;background:var(--pale);color:var(--blue);padding:0 14px;cursor:pointer}.menu-brand{display:flex;align-items:center;gap:16px;padding:14px 0 22px;border-bottom:1px solid var(--gline);color:var(--muted)}.mega-columns{display:grid;grid-template-columns:repeat(4,1fr);gap:26px;margin-top:20px}.mega-columns h2{font-size:14px;color:var(--blue);margin:0 0 10px}.mega-columns a{display:block;padding:10px 0;border-bottom:1px solid var(--gline)}.mega-columns b{display:block;color:var(--ink);font-size:15px}.mega-columns span{display:block;color:var(--muted);font-size:12px}.search-panel{padding:24px 0 36px}.search-box{display:block;color:var(--muted);font-size:13px}.search-box input{display:block;width:100%;height:54px;margin-top:8px;padding:0 17px;border:1px solid var(--line);border-radius:15px;outline:none}.search-chips{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0}.search-chips button{border:0;background:var(--pale);color:var(--deep);padding:7px 11px;border-radius:999px;cursor:pointer}.search-links{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.search-links a{padding:15px;border:1px solid var(--gline);border-radius:14px;background:var(--wash);font-weight:800;color:var(--ink)}.search-links span{display:block;color:var(--muted);font-size:12px;font-weight:500}.panel-open{overflow:hidden}.center{text-align:center}.muted{color:var(--muted)}a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid rgba(20,120,242,.35);outline-offset:3px}
@media(max-width:1100px){.desktop-nav{grid-template-columns:220px 1fr 220px}.brand-tag{display:none}.main-nav a,.nav-action{padding-inline:8px;font-size:13px}.home-grid{grid-template-columns:1fr 1.35fr}.home-quick{grid-column:1/-1;display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.home-quick h2{grid-column:1/-1}.quick{border:1px solid var(--gline);padding:14px;border-radius:14px}.overview{grid-template-columns:1fr 1fr}.grid{grid-template-columns:1fr 1fr}.masonry{columns:2}.steps{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:1fr}.app-showcase{grid-template-columns:1fr}.search-links{grid-template-columns:1fr 1fr}}
@media(max-width:760px){.shell{width:min(calc(100% - 30px),var(--max))}.desktop-nav{display:none}.mobile-nav{display:flex}.site-header{height:64px}.page-hero{padding:38px 0 24px}.page-hero h1{font-size:36px}.section{padding:38px 0}.section-head{display:block}.section-head p{margin-top:8px}.grid,.feature-list,.topic-grid,.split,.story-layout,.discussion{grid-template-columns:1fr}.masonry{columns:1}.steps{grid-template-columns:1fr}.notice{grid-template-columns:1fr;gap:6px}.home-grid{display:flex;flex-direction:column}.home-copy{order:1}.home-banner{order:2}.home-quick{order:3;display:grid;grid-template-columns:1fr 1fr}.home-copy h1{font-size:36px}.overview{grid-template-columns:1fr}.mini-grid{grid-template-columns:1fr}.service-four{grid-template-columns:1fr 1fr}.manifesto{padding:30px 22px}.footer-links{grid-template-columns:1fr 1fr}.site-footer{padding-bottom:calc(92px + env(safe-area-inset-bottom))}.mobile-bottom{position:fixed;display:grid;grid-template-columns:repeat(5,1fr);left:0;right:0;bottom:0;z-index:70;background:rgba(255,255,255,.98);border-top:1px solid var(--gline);padding-bottom:env(safe-area-inset-bottom)}.mobile-bottom a{min-height:54px;display:flex;align-items:center;justify-content:center;font-size:13px;color:var(--muted)}.mega-menu,.search-panel{top:64px;bottom:0;max-height:none}.mega-menu{left:auto;width:min(88vw,420px);padding:20px 18px;transform:translateX(105%);opacity:1}.mega-menu.is-open{transform:none}.mega-columns{grid-template-columns:1fr;gap:6px}.search-links{grid-template-columns:1fr}.secondary-link{margin-left:10px}.brand-logo{max-width:132px;max-height:36px}}
@media(max-width:430px){.home-quick{grid-template-columns:1fr}.service-four{grid-template-columns:1fr}.footer-links{grid-template-columns:1fr 1fr}.primary-btn{width:100%}.secondary-link{display:flex;margin:12px 0 0}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

/* 栏目差异化排版 */
.plaza-board{display:grid;grid-template-columns:1.15fr .85fr;gap:22px}.plaza-feature{padding:32px;border-radius:24px;background:linear-gradient(145deg,var(--pale),#fff);border:1px solid var(--line);box-shadow:var(--shadow)}.plaza-feature h2{margin:0 0 12px;color:var(--ink);font-size:clamp(26px,3vw,40px)}.plaza-index{display:grid;grid-template-columns:1fr 1fr;gap:12px}.plaza-index a{padding:18px;border-radius:17px;border:1px solid var(--gline);background:#fff}.plaza-index b,.plaza-index span{display:block}.plaza-index b{color:var(--ink);margin-bottom:4px}.plaza-index span{font-size:13px;color:var(--muted)}
.city-index{display:grid;grid-template-columns:1.1fr .9fr;gap:22px;align-items:stretch}.city-map-fallback{min-height:280px;padding:34px;border-radius:28px;background:linear-gradient(150deg,#d9eafe 0%,#edf5ff 48%,#fff 100%);border:1px solid var(--line);display:flex;flex-direction:column;justify-content:flex-end;position:relative;overflow:hidden}.city-map-fallback:before,.city-map-fallback:after{content:"";position:absolute;border:1px solid rgba(20,120,242,.16);border-radius:50%;pointer-events:none}.city-map-fallback:before{width:210px;height:210px;right:-50px;top:-50px}.city-map-fallback:after{width:130px;height:130px;right:65px;top:62px}.city-map-fallback span{color:var(--blue);font-weight:850}.city-map-fallback strong{font-size:clamp(24px,3vw,38px);color:var(--ink);line-height:1.2;margin:8px 0}.city-map-fallback p{margin:0;color:var(--muted)}.city-links{display:grid;grid-template-columns:1fr 1fr;gap:12px}.city-links a{min-height:82px;padding:18px;border-radius:16px;background:var(--wash);border:1px solid var(--gline);display:flex;align-items:center;color:var(--ink);font-weight:850}.city-links a:before{content:"";width:9px;height:9px;border-radius:50%;background:var(--blue);margin-right:10px}
.tag-wall a{display:inline-flex;align-items:center;min-height:46px;padding:0 18px;border-radius:999px;border:1px solid var(--line);background:#fff;color:var(--deep);font-weight:850;box-shadow:var(--shadow)}.tag-wall a:nth-child(3n+1){font-size:18px}.tag-wall a:nth-child(4n+2){padding-inline:25px;background:var(--pale)}
.story-reading{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(240px,.65fr);gap:24px;align-items:start}.long-read{padding:34px;border-radius:24px;background:#fff;border:1px solid var(--gline);box-shadow:var(--shadow)}.long-read h2{margin:0 0 18px;color:var(--ink);font-size:clamp(27px,3vw,40px)}.long-read p{font-size:17px}.reading-note{position:sticky;top:104px;padding:24px;border-radius:20px;background:var(--pale);border:1px solid var(--line)}.reading-note strong{display:block;color:var(--deep);margin-bottom:8px}.reading-note p{margin:0;color:var(--muted)}
.masonry-like{display:grid;grid-template-columns:repeat(3,1fr);grid-auto-flow:dense;gap:16px}.masonry-like article{padding:24px;border-radius:20px;border:1px solid var(--gline);background:#fff;box-shadow:var(--shadow)}.masonry-like h2{margin:0 0 10px;color:var(--ink);font-size:23px;line-height:1.3}.masonry-like p{margin:0}.discover-tall{grid-row:span 2;background:linear-gradient(155deg,var(--pale),#fff)!important}.discover-wide{grid-column:span 2}
.about-story{display:grid;grid-template-columns:.85fr 1.15fr;gap:28px;align-items:center}.about-mark img{width:100%;height:auto;max-height:460px;object-fit:contain;border-radius:24px}.about-story article{padding:16px 0}.about-story h2{margin:10px 0 15px;color:var(--ink);font-size:clamp(28px,4vw,46px);line-height:1.2}
.card,.panel,.topic,.mini,.notice,.step,.search-links a,.mega-columns a,.plaza-index a,.city-links a,.tag-wall a{transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}.card:hover,.panel:hover,.topic:hover,.mini:hover,.plaza-index a:hover,.city-links a:hover,.tag-wall a:hover{transform:translateY(-2px);border-color:rgba(20,120,242,.25);box-shadow:var(--bshadow)}
@media(max-width:760px){.plaza-board,.city-index,.story-reading,.about-story{grid-template-columns:1fr}.plaza-index,.city-links{grid-template-columns:1fr 1fr}.masonry-like{grid-template-columns:1fr}.discover-tall,.discover-wide{grid-row:auto;grid-column:auto}.reading-note{position:static}.long-read{padding:24px}.city-map-fallback{min-height:220px}}
@media(max-width:430px){.plaza-index,.city-links{grid-template-columns:1fr}}