:root{--blue:#1478F2;--bright:#2F8CFF;--deep:#075DC9;--navy:#084A9C;--ink:#172033;--text:#3E4859;--muted:#6F7A89;--assist:#98A1AF;--pale:#EDF5FF;--soft:#F7FAFF;--gray:#F5F6F8;--white:#fff;--line:rgba(20,120,242,.12);--grayline: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}body{margin:0;color:var(--text);background:#fff;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}button{cursor:pointer}img{max-width:100%;height:auto;display:block}.container{width:min(calc(100% - 40px),var(--max));margin-inline:auto}.skip-link{position:fixed;left:16px;top:8px;z-index:200;transform:translateY(-150%);background:#fff;color:var(--blue);padding:8px 12px;border-radius:8px}.skip-link:focus{transform:none}.site-header{position:sticky;top:0;z-index:90;background:rgba(255,255,255,.96);backdrop-filter:saturate(140%) blur(14px);border-bottom:1px solid var(--grayline)}.desktop-nav{height:74px;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:22px}.brand{display:flex;align-items:center;gap:10px;min-width:max-content}.brand-logo{max-width:146px;max-height:38px;object-fit:contain}.brand-text{font-size:24px;font-weight:800;color:var(--blue);letter-spacing:.04em}.brand-tag{font-size:12px;color:var(--deep);background:var(--pale);padding:4px 9px;border-radius:999px}.main-nav{display:flex;justify-content:center;align-items:center;gap:2px;min-width:0}.nav-link,.icon-link,.icon-button{min-height:44px;padding:0 12px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;font-size:14px;white-space:nowrap}.nav-link:hover,.icon-link:hover,.icon-button:hover{background:var(--soft);color:var(--blue)}.nav-link.is-active,.icon-link.is-active{color:var(--blue);background:var(--pale);font-weight:700}.nav-actions{display:flex;align-items:center;gap:4px}.icon-button{background:transparent;border:0;color:var(--text)}.mobile-nav{display:none;height:62px;padding:0 15px;align-items:center;grid-template-columns:64px 1fr 64px}.mobile-brand{text-align:center;justify-self:center;color:var(--blue);font-weight:800;font-size:20px}.mobile-logo{max-width:136px;max-height:34px;object-fit:contain}.mobile-action{min-width:44px;min-height:44px;border:0;background:transparent;display:flex;align-items:center;justify-content:center;color:var(--text);font-size:14px}.site-main{min-height:60vh}.page-shell{padding:56px 0 80px}.page-intro{max-width:860px;margin-bottom:34px}.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font-weight:700;font-size:13px;letter-spacing:.08em}.eyebrow:before{content:"";width:22px;height:3px;border-radius:4px;background:var(--blue)}h1,h2,h3{color:var(--ink);line-height:1.25;margin-top:0}h1{font-size:clamp(34px,5vw,58px);letter-spacing:-.035em;margin:12px 0 18px}h2{font-size:clamp(24px,3vw,34px)}h3{font-size:19px}.lead{font-size:18px;color:var(--muted);max-width:800px}.section{padding:38px 0}.section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:22px}.section-head p{max-width:680px;margin:0;color:var(--muted)}.text-link{color:var(--blue);font-weight:700}.text-link:hover{text-decoration:underline}.primary-link{display:inline-flex;min-height:46px;align-items:center;justify-content:center;padding:0 18px;border-radius:13px;color:#fff;background:linear-gradient(135deg,#3A96FF 0%,#1478F2 55%,#0863D3 100%);box-shadow:var(--bshadow);font-weight:700}.primary-link:hover{filter:brightness(.98);transform:translateY(-1px)}.secondary-link{display:inline-flex;min-height:44px;align-items:center;color:var(--blue);font-weight:700;padding:0 4px}.card{background:#fff;border:1px solid var(--grayline);border-radius:16px;padding:22px;box-shadow:var(--shadow)}.soft{background:var(--soft)}.pale{background:var(--pale)}.tag{display:inline-block;border-radius:999px;background:var(--pale);color:var(--deep);padding:4px 10px;font-size:12px;margin:0 5px 7px 0}.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.stack{display:grid;gap:16px}.prose{font-size:16px}.prose p{margin:0 0 16px}.hero-editorial{background:linear-gradient(180deg,var(--soft),#fff);padding:38px 0 28px}.hero-grid{display:grid;grid-template-columns:.9fr 1.45fr .9fr;gap:18px;align-items:stretch}.hero-side,.hero-banner{border-radius:20px;overflow:hidden}.hero-side{background:#fff;border:1px solid var(--grayline);padding:24px}.hero-side h1{font-size:32px}.hero-banner{background:linear-gradient(145deg,#dcecff,#f9fcff);min-height:420px;display:flex;align-items:center;justify-content:center;position:relative;border:1px solid var(--line)}.hero-banner img{width:100%;height:100%;object-fit:contain}.hero-fallback{padding:50px;text-align:center}.hero-fallback strong{display:block;color:var(--blue);font-size:42px;margin-bottom:12px}.hero-entry{display:block;padding:16px 0;border-bottom:1px solid var(--grayline)}.hero-entry:last-child{border-bottom:0}.hero-entry strong{display:block;color:var(--ink);margin-bottom:3px}.hero-entry span{font-size:13px;color:var(--muted)}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}.channel-strip{overflow-x:auto;border-block:1px solid var(--grayline);background:#fff}.channel-strip .container{display:flex;min-width:max-content;gap:8px;padding-block:12px}.channel-strip a{padding:8px 12px;border-radius:999px;color:var(--muted);font-size:14px}.channel-strip a:hover{background:var(--pale);color:var(--blue)}.overview-grid{display:grid;grid-template-columns:1.15fr .85fr 1fr .9fr;gap:16px}.overview-grid article:nth-child(2){margin-top:24px}.overview-grid article:nth-child(4){margin-top:12px}.discussion{display:grid;grid-template-columns:1.25fr 1fr;gap:22px}.discussion-main{padding:30px;background:var(--ink);color:#eaf3ff;border-radius:20px}.discussion-main h2{color:#fff}.discussion-main p{color:#d8e6f7}.discussion-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}.discussion-list a{padding:18px;border:1px solid var(--grayline);border-radius:14px;background:#fff}.discussion-list strong{display:block;color:var(--ink);margin-bottom:6px}.discussion-list span{font-size:13px;color:var(--muted)}.city-map{display:grid;grid-template-columns:1.3fr .7fr 1fr;grid-template-rows:auto auto;gap:14px}.city-node{padding:22px;border-radius:18px;background:#fff;border:1px solid var(--line)}.city-node:nth-child(1){grid-row:span 2;background:var(--pale)}.city-node:nth-child(4){grid-column:span 2}.life-masonry{columns:3 260px;column-gap:16px}.life-note{break-inside:avoid;margin:0 0 16px;padding:22px;border:1px solid var(--grayline);border-radius:18px;background:#fff}.life-note:nth-child(3n+2){background:var(--soft)}.route-list{display:grid;grid-template-columns:repeat(6,minmax(190px,1fr));gap:14px;overflow-x:auto;padding-bottom:8px}.route-step{min-width:190px;border-top:3px solid var(--blue);padding:18px;background:#fff;border-radius:0 0 14px 14px;box-shadow:var(--shadow)}.interest-cloud{display:flex;flex-wrap:wrap;gap:12px;align-items:flex-start}.interest-cloud a{border:1px solid var(--line);background:#fff;border-radius:18px;padding:18px;flex:1 1 210px}.interest-cloud a:nth-child(3n+1){flex-basis:280px;background:var(--pale)}.qa-list details{border-bottom:1px solid var(--grayline);padding:18px 0}.qa-list summary{cursor:pointer;color:var(--ink);font-weight:750;font-size:18px}.qa-list p{color:var(--muted);margin:12px 0 0}.story-list{display:grid;grid-template-columns:1.3fr .7fr;gap:22px}.story-main{padding:34px;border-radius:20px;background:var(--soft)}.story-side{display:grid;gap:14px}.discover-wall{columns:3 260px;column-gap:16px}.discover-item{break-inside:avoid;border-radius:18px;padding:22px;margin-bottom:16px;border:1px solid var(--grayline);background:#fff}.discover-item:nth-child(4n+1){background:var(--pale)}.topic-board{display:grid;grid-template-columns:.9fr 1.1fr;gap:26px}.topic-title-panel{position:sticky;top:100px;align-self:start;padding:30px;background:var(--pale);border-radius:20px}.topic-list article{padding:24px 0;border-bottom:1px solid var(--grayline)}.guide-index{display:grid;grid-template-columns:240px 1fr;gap:28px}.guide-nav{position:sticky;top:104px;align-self:start}.guide-nav a{display:block;padding:9px 12px;border-left:2px solid var(--line);color:var(--muted)}.guide-nav a:hover{color:var(--blue);border-left-color:var(--blue)}.principles{counter-reset:item}.principle{display:grid;grid-template-columns:54px 1fr;gap:18px;padding:24px 0;border-bottom:1px solid var(--grayline)}.principle:before{counter-increment:item;content:counter(item,decimal-leading-zero);color:var(--blue);font-weight:800;font-size:22px}.notice-list article{display:grid;grid-template-columns:150px 1fr;gap:20px;padding:22px 0;border-bottom:1px solid var(--grayline)}.notice-type{color:var(--blue);font-weight:700}.app-layout{display:grid;grid-template-columns:1fr .8fr;gap:36px;align-items:center}.app-art{min-height:420px;border-radius:28px;background:linear-gradient(160deg,var(--pale),#fff);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;overflow:hidden;padding:24px}.app-art img{max-height:520px;object-fit:contain}.app-services{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:20px 0}.steps{counter-reset:step}.step{position:relative;padding:0 0 24px 54px}.step:before{counter-increment:step;content:counter(step);position:absolute;left:0;top:0;width:36px;height:36px;border-radius:50%;display:grid;place-items:center;background:var(--blue);color:#fff;font-weight:800}.step:after{content:"";position:absolute;left:17px;top:40px;bottom:4px;width:2px;background:var(--line)}.step:last-child:after{display:none}.risk-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.risk-card{padding:24px;border-radius:18px;background:var(--soft);border-left:4px solid var(--blue)}.privacy-list{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.privacy-list article{padding:20px;border:1px solid var(--grayline);border-radius:16px}.rules-index{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.rule-item{padding:22px;border:1px solid var(--grayline);border-radius:16px}.help-categories{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.help-categories a{padding:20px;border-radius:16px;background:var(--soft);border:1px solid var(--grayline)}.feedback-flow{display:grid;grid-template-columns:1fr 1fr;gap:22px}.contact-board{display:grid;grid-template-columns:.8fr 1.2fr;gap:28px}.about-manifesto{font-size:clamp(24px,4vw,46px);line-height:1.35;color:var(--ink);max-width:1000px}.brand-values{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.brand-values article{padding:24px;border-top:3px solid var(--blue);background:var(--soft)}.feature-image{border-radius:20px;overflow:hidden;background:var(--pale);border:1px solid var(--line);min-height:220px;display:flex;align-items:center;justify-content:center}.feature-image img{width:100%;height:100%;object-fit:contain}.image-fallback{padding:36px;color:var(--blue);font-weight:800;font-size:24px;text-align:center}.note-box{padding:18px 20px;border-radius:14px;background:var(--pale);color:var(--navy)}
.site-footer{background:#0B1F38;color:#EAF3FF;padding:52px 0 24px}.footer-top{display:grid;grid-template-columns:1.1fr 2fr;gap:48px}.footer-brand p{color:#bfd0e6}.footer-brand-link{display:inline-flex;color:#fff;font-size:24px}.footer-logo{max-width:160px;max-height:44px;object-fit:contain}.footer-en{font-size:12px;letter-spacing:.16em;color:#9fc2ed;margin:10px 0 14px}.footer-groups{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}.footer-groups h2{color:#fff;font-size:15px;margin-bottom:12px}.footer-groups a{display:block;color:#cfe0f5;font-size:14px;padding:4px 0}.footer-groups a:hover{color:#fff}.footer-note{margin-top:34px;padding-top:22px;border-top:1px solid rgba(255,255,255,.1);color:#b9cce3;font-size:14px}.footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:18px;color:#91a9c5;font-size:13px}.overlay{position:fixed;inset:74px 0 0;background:rgba(11,31,56,.34);z-index:100;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:110;background:#fff;max-height:calc(100vh - 74px);overflow:auto;visibility:hidden;opacity:0;pointer-events:none;transform:translateY(-10px);transition:.2s}.mega-menu.is-open,.search-panel.is-open{visibility:visible;opacity:1;pointer-events:auto;transform:none}.menu-head,.search-head{display:flex;align-items:center;justify-content:space-between;padding-top:20px}.menu-head button,.search-head button{border:0;background:var(--pale);color:var(--blue);min-height:44px;padding:0 14px;border-radius:12px}.menu-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:26px;padding-top:20px;padding-bottom:34px}.menu-grid h2{font-size:15px;color:var(--blue)}.menu-grid a{display:block;padding:10px 0;border-bottom:1px solid var(--grayline)}.menu-grid strong{display:block;color:var(--ink);font-size:14px}.menu-grid span{display:block;color:var(--muted);font-size:12px;line-height:1.55;margin-top:2px}.search-inner{padding-bottom:30px}.search-inner label{display:block;margin:22px 0 8px;color:var(--muted);font-size:14px}.search-inner input{width:100%;height:56px;border:1px solid var(--line);border-radius:14px;padding:0 18px;outline:0}.search-inner input:focus{border-color:var(--blue);box-shadow:0 0 0 4px rgba(20,120,242,.08)}.search-hints{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:16px}.search-hints a{padding:14px;border:1px solid var(--grayline);border-radius:12px}.search-hints a[hidden]{display:none}.search-hints span{display:block;color:var(--muted);font-size:12px}.search-common{display:flex;gap:12px;flex-wrap:wrap;margin-top:16px}.search-common a{font-size:13px;color:var(--blue)}.mobile-bottom{display:none}.no-scroll{overflow:hidden}:focus-visible{outline:3px solid rgba(20,120,242,.35);outline-offset:3px}
@media(max-width:1120px){.main-nav{gap:0}.nav-link{padding:0 8px;font-size:13px}.brand-tag{display:none}.overview-grid{grid-template-columns:1fr 1fr}.overview-grid article:nth-child(n){margin-top:0}.hero-grid{grid-template-columns:1fr 1.4fr}.hero-grid>.hero-side:last-child{grid-column:1/-1;display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.hero-entry{border:1px solid var(--grayline);padding:14px;border-radius:12px}.footer-top{grid-template-columns:1fr}.help-categories{grid-template-columns:repeat(2,1fr)}}
@media(max-width:860px){.desktop-nav{display:none}.mobile-nav{display:grid}.site-header{height:62px}.site-main{padding-bottom:62px}.container{width:min(calc(100% - 30px),var(--max))}.page-shell{padding:36px 0 60px}.hero-editorial{padding-top:22px}.hero-grid{grid-template-columns:1fr}.hero-grid>.hero-side:first-child{order:1}.hero-grid>.hero-banner{order:2;min-height:260px}.hero-grid>.hero-side:last-child{order:3;grid-column:auto;grid-template-columns:1fr 1fr}.hero-side h1{font-size:34px}.discussion,.story-list,.topic-board,.guide-index,.app-layout,.feedback-flow,.contact-board{grid-template-columns:1fr}.topic-title-panel,.guide-nav{position:static}.city-map{grid-template-columns:1fr 1fr}.city-node:nth-child(1){grid-row:auto;grid-column:1/-1}.city-node:nth-child(4){grid-column:auto}.life-masonry,.discover-wall{columns:2 240px}.privacy-list{grid-template-columns:1fr 1fr}.footer-groups{grid-template-columns:1fr 1fr}.overlay{inset:62px 0 62px}.mega-menu{left:auto;top:62px;bottom:62px;width:min(88vw,420px);max-height:none;transform:translateX(100%)}.mega-menu.is-open{transform:none}.menu-grid{grid-template-columns:1fr;padding-inline:15px}.menu-head{padding-inline:15px}.search-panel{top:62px;bottom:0;max-height:none}.search-hints{grid-template-columns:1fr 1fr}.mobile-bottom{position:fixed;z-index:80;left:0;right:0;bottom:0;height:calc(58px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);display:grid;grid-template-columns:repeat(5,1fr);background:rgba(255,255,255,.98);border-top:1px solid var(--grayline)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;min-height:48px;font-size:13px;color:var(--muted)}.mobile-bottom a.is-active{color:var(--blue);font-weight:800}.site-footer{padding-bottom:calc(84px + env(safe-area-inset-bottom))}}
@media(max-width:620px){h1{font-size:38px}.lead{font-size:16px}.grid-2,.grid-3,.grid-4,.overview-grid,.discussion-list,.risk-grid,.privacy-list,.rules-index,.brand-values,.app-services{grid-template-columns:1fr}.hero-grid>.hero-side:last-child{grid-template-columns:1fr}.life-masonry,.discover-wall{columns:1}.city-map{grid-template-columns:1fr}.city-node:nth-child(n){grid-column:auto}.notice-list article{grid-template-columns:1fr;gap:6px}.help-categories{grid-template-columns:1fr}.footer-groups{grid-template-columns:1fr 1fr}.footer-bottom{flex-direction:column}.search-hints{grid-template-columns:1fr}.section{padding:30px 0}.section-head{display:block}.section-head .text-link{display:inline-block;margin-top:8px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
/* Channel-specific editorial layouts */
.plaza-board{display:grid;grid-template-columns:1.25fr .75fr;gap:16px}.plaza-board .card:first-child{grid-row:span 2;background:var(--pale)}.plaza-board .card:nth-child(4){grid-column:1/-1}.long-read-list{display:grid;gap:0;border-top:1px solid var(--grayline)}.long-read-list .card{border:0;border-bottom:1px solid var(--grayline);border-radius:0;box-shadow:none;padding:28px 8px;display:grid;grid-template-columns:minmax(170px,.45fr) 1fr;column-gap:28px}.long-read-list .card h3{grid-column:1}.long-read-list .card p,.long-read-list .card .text-link{grid-column:2}.guide-article-list{counter-reset:guide;display:grid;grid-template-columns:1fr 1fr;gap:0 28px}.guide-article-list .card{counter-increment:guide;border:0;border-top:1px solid var(--grayline);border-radius:0;box-shadow:none;padding:24px 0}.guide-article-list .card h3:before{content:counter(guide,decimal-leading-zero) " · ";color:var(--blue)}.help-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.help-grid .card{background:var(--soft);box-shadow:none}.risk-grid .risk-card{box-shadow:none}.route-step .text-link{display:inline-flex;margin-top:8px}.route-step small,.interest-cloud small{display:block;color:var(--muted);margin-top:8px;line-height:1.55}
@media(max-width:860px){.plaza-board,.guide-article-list{grid-template-columns:1fr}.plaza-board .card:first-child{grid-row:auto}.plaza-board .card:nth-child(4){grid-column:auto}.long-read-list .card{grid-template-columns:1fr;gap:8px}.long-read-list .card h3,.long-read-list .card p,.long-read-list .card .text-link{grid-column:1}.help-grid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.help-grid{grid-template-columns:1fr}}