:root{--bg:#fff;--sub:#f7faff;--pale:#edf5ff;--gray:#f5f6f8;--title:#172033;--text:#3e4859;--muted:#6f7a89;--soft:#98a1af;--blue:#1478f2;--bright:#2f8cff;--deep:#075dc9;--dark:#084a9c;--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;--radius:18px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.75 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;overflow-x:hidden}body.panel-open{overflow:hidden}a{color:inherit;text-decoration:none}a,button,input,summary{outline:none}a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{box-shadow:0 0 0 3px rgba(20,120,242,.22);border-radius:10px}button,input{font:inherit}.skip-link{position:fixed;left:16px;top:-80px;z-index:999;background:#fff;color:var(--blue);padding:10px 14px;border-radius:10px}.skip-link:focus{top:8px}
.site-header{position:sticky;top:0;z-index:80;background:rgba(255,255,255,.96);border-bottom:1px solid var(--grayline);backdrop-filter:blur(10px)}.nav-shell{max-width:var(--max);margin:auto;padding:0 22px}.desktop-nav{height:74px;display:flex;align-items:center;gap:22px;min-width:0}.brand-lockup{display:flex;align-items:center;gap:9px;flex:0 0 auto;min-width:210px}.brand-lockup img,.mobile-brand img,.footer-brand-mark img{display:block;max-height:38px;width:auto;max-width:155px}.brand-lockup strong{font-size:23px;color:var(--blue);white-space:nowrap}.brand-tag{padding:3px 8px;background:var(--pale);color:var(--deep);font-size:12px;border-radius:999px;white-space:nowrap}.primary-nav{display:flex;align-items:center;justify-content:center;gap:4px;flex:1;min-width:0;white-space:nowrap}.primary-nav a,.nav-tool{min-height:44px;display:inline-flex;align-items:center;justify-content:center;padding:0 10px;border-radius:11px;color:var(--text);font-weight:600;font-size:14px}.primary-nav a:hover,.nav-tool:hover{background:var(--sub);color:var(--blue)}.primary-nav .is-current{background:var(--pale);color:var(--blue)}.nav-actions{display:flex;gap:4px}.nav-tool{border:0;background:transparent;cursor:pointer}.site-main{min-height:60vh}.page-shell{max-width:var(--max);margin:0 auto;padding:0 22px}.section{padding:66px 0}.section.compact{padding:42px 0}.eyebrow{display:inline-flex;align-items:center;gap:7px;color:var(--blue);font-size:13px;font-weight:700}.eyebrow:before{content:"";width:7px;height:7px;background:var(--blue);border-radius:50%}.section-title{margin:8px 0 12px;color:var(--title);font-size:clamp(28px,3vw,42px);line-height:1.2}.section-lead{max-width:800px;margin:0;color:var(--muted);font-size:17px}.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--blue);font-weight:700}.text-link:after{content:"→"}.primary-button{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:700;box-shadow:var(--bshadow)}.soft-card{background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:var(--radius)}.tag{display:inline-flex;padding:4px 9px;background:var(--pale);color:var(--deep);border-radius:999px;font-size:12px}
.hero-editor{padding:34px 0 26px;background:linear-gradient(180deg,var(--sub),#fff)}.editor-grid{display:grid;grid-template-columns:.9fr 1.55fr .9fr;gap:18px;align-items:stretch}.editor-note,.editor-side{padding:24px}.editor-note h1{font-size:clamp(31px,4vw,52px);line-height:1.08;margin:12px 0 18px;color:var(--title)}.editor-note p{margin:0 0 20px;color:var(--muted)}.hero-actions{display:flex;gap:14px;align-items:center;flex-wrap:wrap}.banner-card{min-height:440px;display:flex;align-items:stretch;overflow:hidden;background:radial-gradient(circle at 75% 20%,rgba(47,140,255,.25),transparent 34%),linear-gradient(145deg,#0d6fe7,#eaf4ff 70%);position:relative}.banner-card img{width:100%;height:100%;object-fit:contain;background:#fff}.banner-fallback{padding:42px;display:flex;flex-direction:column;justify-content:flex-end;color:#fff}.banner-fallback strong{font-size:44px;line-height:1.05}.banner-fallback span{max-width:360px;margin-top:12px}.editor-side h2{font-size:16px;color:var(--title);margin:0 0 12px}.quick-entry{display:block;padding:14px 0;border-top:1px solid var(--grayline)}.quick-entry:first-of-type{border-top:0}.quick-entry strong{display:block;color:var(--title)}.quick-entry span{font-size:13px;color:var(--muted)}
.channel-strip{border-top:1px solid var(--grayline);border-bottom:1px solid var(--grayline)}.channel-scroll{display:flex;gap:26px;overflow-x:auto;padding:14px 22px;max-width:var(--max);margin:auto;scrollbar-width:none}.channel-scroll::-webkit-scrollbar{display:none}.channel-scroll a{white-space:nowrap;color:var(--muted);font-size:14px}.channel-scroll a:before{content:"";display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--blue);margin-right:7px}
.overview-grid{display:grid;grid-template-columns:1.25fr .9fr 1.1fr .85fr;gap:14px}.overview-card{padding:24px;min-height:205px;background:var(--sub);border:1px solid var(--line);border-radius:var(--radius)}.overview-card:nth-child(2){background:var(--pale)}.overview-card h3{margin:0 0 10px;color:var(--title)}.discussion-grid{display:grid;grid-template-columns:1.3fr .9fr;gap:18px}.feature-topic{padding:32px;background:var(--title);color:#eaf3ff;border-radius:24px}.feature-topic h3{font-size:30px;line-height:1.3;margin:10px 0}.feature-topic p{color:#cfdef2}.feature-topic .text-link{color:#fff}.discussion-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}.discussion-item{padding:18px;border:1px solid var(--grayline);border-radius:16px}.discussion-item h3{font-size:16px;color:var(--title);margin:0 0 6px}.discussion-item p{font-size:13px;color:var(--muted);margin:0 0 8px}
.city-board{display:grid;grid-template-columns:repeat(12,1fr);gap:14px}.city-item{grid-column:span 4;padding:24px;background:var(--sub);border-radius:18px;border:1px solid var(--line)}.city-item:nth-child(1),.city-item:nth-child(4){grid-column:span 5}.city-item:nth-child(2),.city-item:nth-child(5){grid-column:span 3}.city-item h3{margin:0 0 8px;color:var(--title)}.masonry-life{columns:3 260px;column-gap:14px}.life-note{break-inside:avoid;margin:0 0 14px;padding:22px;border:1px solid var(--grayline);border-radius:18px;background:#fff}.life-note:nth-child(odd){background:var(--sub)}.life-note h3{margin:8px 0;color:var(--title)}.route-strip{display:grid;grid-template-columns:repeat(6,minmax(220px,1fr));gap:14px;overflow-x:auto;padding-bottom:8px}.route-card{padding:22px;border-radius:18px;background:#fff;border:1px solid var(--line);min-height:255px}.route-step{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:var(--blue);color:#fff;font-weight:700}.interest-cloud{display:flex;flex-wrap:wrap;gap:12px}.interest-chip{flex:1 1 220px;padding:18px 20px;border-radius:18px;background:var(--pale);border:1px solid var(--line)}.interest-chip:nth-child(3n){flex-basis:300px;background:var(--sub)}.interest-chip h3{margin:0 0 6px;color:var(--title)}.qa-index{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.qa-card{padding:24px;border-left:4px solid var(--blue);background:var(--sub);border-radius:0 18px 18px 0}.qa-card h3{margin:0 0 9px;color:var(--title)}.story-layout{display:grid;grid-template-columns:1.25fr .75fr;gap:18px}.story-main{padding:30px;border-radius:24px;background:var(--pale)}.story-main h3{font-size:30px;color:var(--title);line-height:1.3}.story-stack{display:grid;gap:12px}.story-mini{padding:18px;border:1px solid var(--grayline);border-radius:16px}.discover-wall{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.discover-card{padding:22px;border:1px solid var(--grayline);border-radius:18px}.discover-card:nth-child(1),.discover-card:nth-child(6){grid-column:span 2;background:var(--sub)}.guide-list{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.guide-card{padding:24px;border:1px solid var(--line);border-radius:18px;background:#fff}.principles{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.principle{padding:24px;background:var(--sub);border-radius:18px}
.app-feature{display:grid;grid-template-columns:1fr 1.1fr;gap:22px;align-items:center;padding:30px;background:var(--pale);border-radius:24px}.app-visual{min-height:400px;display:grid;place-items:center;border-radius:18px;background:linear-gradient(145deg,#dbeeff,#fff);overflow:hidden}.app-visual img{width:100%;height:100%;object-fit:contain}.app-copy h2{font-size:34px;color:var(--title)}.service-four{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:24px 0}.service-four div{padding:15px;background:#fff;border-radius:13px;border:1px solid var(--line)}.security-pair{display:grid;grid-template-columns:1fr 1fr;gap:18px}.security-block{padding:30px;border-radius:24px;background:var(--title);color:#eaf3ff}.security-block:nth-child(2){background:var(--pale);color:var(--text);transform:translateY(26px)}.security-block h3{font-size:28px;color:inherit}.faq-home{display:grid;grid-template-columns:1fr 1fr;gap:12px}.faq-home details,.faq-list details{border:1px solid var(--grayline);border-radius:15px;padding:16px 18px;background:#fff}.faq-home summary,.faq-list summary{cursor:pointer;font-weight:700;color:var(--title)}.brand-statement{padding:46px;border-radius:26px;background:linear-gradient(120deg,#0a65d3,#1478f2 58%,#2f8cff);color:#fff}.brand-statement h2{font-size:38px;max-width:760px;line-height:1.2}.brand-statement p{max-width:900px;color:#edf5ff}
.page-intro{padding:58px 0 34px;background:var(--sub);border-bottom:1px solid var(--grayline)}.page-intro h1{font-size:clamp(34px,5vw,58px);line-height:1.12;margin:8px 0 14px;color:var(--title)}.page-intro p{max-width:820px;color:var(--muted);font-size:18px}.content-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.content-card{padding:26px;border:1px solid var(--grayline);border-radius:18px;background:#fff}.content-card h2,.content-card h3{color:var(--title);margin-top:0}.wide-note{padding:30px;background:var(--pale);border-radius:22px}.topic-index{display:grid;gap:13px}.topic-row{display:grid;grid-template-columns:220px 1fr auto;gap:18px;align-items:start;padding:22px;border-bottom:1px solid var(--grayline)}.topic-row h2{font-size:20px;margin:0;color:var(--title)}.topic-row p{margin:0;color:var(--muted)}.topic-row .text-link{white-space:nowrap}.magazine-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:18px}.magazine-lead{padding:32px;background:var(--pale);border-radius:24px}.magazine-side{display:grid;gap:13px}.magazine-side article{padding:20px;border:1px solid var(--grayline);border-radius:16px}.steps{counter-reset:step;display:grid;gap:12px}.step{counter-increment:step;display:grid;grid-template-columns:54px 1fr;gap:16px;padding:20px;background:var(--sub);border-radius:18px}.step:before{content:counter(step);width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:var(--blue);color:#fff;font-weight:800}.notice-list{display:grid;grid-template-columns:240px 1fr;gap:0}.notice-categories{padding-right:24px}.notice-categories a{display:block;padding:10px 12px;border-radius:10px;margin-bottom:5px;background:var(--sub);color:var(--muted)}.notice-items article{padding:22px 0;border-bottom:1px solid var(--grayline)}.risk-grid,.privacy-grid,.rule-grid,.help-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.risk-card,.privacy-card,.rule-card,.help-card{padding:24px;border-radius:18px;border:1px solid var(--grayline);background:#fff}.risk-card:nth-child(odd),.privacy-card:nth-child(3n+1){background:var(--sub)}.rule-flow{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.rule-flow div{padding:18px;background:var(--pale);border-radius:14px}.feedback-flow{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.feedback-flow article{padding:22px;background:var(--sub);border-radius:18px}.contact-paths{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.contact-paths article{padding:26px;border:1px solid var(--grayline);border-radius:18px}.about-timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.about-timeline div{padding:22px;background:var(--pale);border-radius:18px}
.site-footer{background:#0b1f38;color:#eaf3ff;padding:56px 0 92px}.footer-shell{max-width:var(--max);margin:auto;padding:0 22px}.footer-brand{max-width:600px}.footer-brand-mark strong{font-size:26px}.footer-brand img{filter:brightness(0) invert(1)}.footer-en{font-weight:700;letter-spacing:.12em;color:#b9d7ff}.footer-groups{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;margin:36px 0}.footer-groups h2{font-size:14px;color:#9bc9ff}.footer-groups a{display:block;padding:4px 0}.footer-reminder{padding-top:26px;border-top:1px solid rgba(255,255,255,.12);color:#bfd0e2}.copyright{color:#8fa8c1;font-size:13px}
.overlay{position:fixed;inset:0;z-index:90;background:rgba(9,27,47,.42);opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}.channel-menu,.search-panel{position:fixed;left:0;right:0;top:74px;z-index:100;background:#fff;max-height:calc(100vh - 74px);overflow:auto;opacity:0;transform:translateY(-12px);visibility:hidden;pointer-events:none;transition:.2s;box-shadow:0 30px 70px rgba(20,50,90,.18)}.channel-menu.is-open,.search-panel.is-open{opacity:1;transform:none;visibility:visible;pointer-events:auto}.panel-head{max-width:var(--max);margin:auto;padding:18px 22px 10px;display:flex;justify-content:space-between;align-items:center}.panel-head strong{font-size:22px;color:var(--title)}.panel-close{min-width:48px;min-height:44px;border:0;background:var(--sub);color:var(--blue);border-radius:12px;cursor:pointer}.channel-grid{max-width:var(--max);margin:auto;padding:12px 22px 34px;display:grid;grid-template-columns:repeat(4,1fr);gap:24px}.channel-grid h2{font-size:14px;color:var(--blue)}.channel-grid a{display:block;padding:10px 0;border-bottom:1px solid var(--grayline)}.channel-grid a strong,.channel-grid a span{display:block}.channel-grid a span{color:var(--muted);font-size:12px}.search-inner{max-width:900px;margin:auto;padding:10px 22px 40px}.search-box span{display:block;font-size:13px;color:var(--muted);margin-bottom:7px}.search-box input{width:100%;height:54px;border:1px solid var(--line);border-radius:14px;padding:0 16px;background:var(--sub)}.search-suggestions{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:16px}.search-suggestions a{padding:14px;border:1px solid var(--grayline);border-radius:13px}.search-suggestions strong,.search-suggestions span{display:block}.search-suggestions span{font-size:12px;color:var(--muted)}.search-links{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}.search-links span{color:var(--muted)}.search-links a{color:var(--blue)}.mobile-only{display:none}.mobile-bottom{display:none}
@media(max-width:1050px){.brand-lockup{min-width:auto}.brand-tag{display:none}.primary-nav a,.nav-tool{padding:0 7px;font-size:13px}.overview-grid{grid-template-columns:1fr 1fr}.discover-wall{grid-template-columns:repeat(3,1fr)}.guide-list,.principles,.risk-grid,.privacy-grid,.rule-grid,.help-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:760px){body{font-size:15px;padding-bottom:66px}.desktop-only{display:none!important}.mobile-only{display:flex}.nav-shell{padding:0 15px}.mobile-nav{height:62px;align-items:center;justify-content:space-between}.icon-button,.mobile-discover{width:48px;height:44px;display:grid;place-items:center;border:0;background:transparent;color:var(--blue);font-weight:700}.hamburger,.hamburger:before,.hamburger:after{width:20px;height:2px;background:var(--blue);display:block;position:relative}.hamburger:before,.hamburger:after{content:"";position:absolute;left:0}.hamburger:before{top:-6px}.hamburger:after{top:6px}.mobile-brand{display:flex;align-items:center;justify-content:center}.mobile-brand strong{font-size:20px;color:var(--blue)}.mobile-brand img{max-height:34px}.page-shell{padding:0 15px}.section{padding:48px 0}.hero-editor{padding-top:20px}.editor-grid{grid-template-columns:1fr}.editor-note{order:1}.banner-card{order:2;min-height:260px}.editor-side{order:3}.editor-note h1{font-size:36px}.overview-grid,.discussion-grid,.qa-index,.story-layout,.app-feature,.security-pair,.content-grid,.magazine-grid,.contact-paths{grid-template-columns:1fr}.discussion-list{grid-template-columns:1fr}.city-board{grid-template-columns:1fr}.city-item,.city-item:nth-child(1),.city-item:nth-child(2),.city-item:nth-child(4),.city-item:nth-child(5){grid-column:auto}.masonry-life{columns:1}.discover-wall{grid-template-columns:1fr}.discover-card:nth-child(1),.discover-card:nth-child(6){grid-column:auto}.guide-list,.principles,.risk-grid,.privacy-grid,.rule-grid,.help-grid{grid-template-columns:1fr}.service-four,.rule-flow,.feedback-flow,.about-timeline{grid-template-columns:1fr 1fr}.faq-home{grid-template-columns:1fr}.topic-row{grid-template-columns:1fr;gap:8px}.notice-list{grid-template-columns:1fr}.notice-categories{padding:0 0 16px;display:flex;gap:8px;overflow:auto}.notice-categories a{white-space:nowrap}.footer-groups{grid-template-columns:1fr 1fr}.site-footer{padding-bottom:90px}.channel-menu,.search-panel{top:0;bottom:0;left:auto;width:min(88vw,420px);max-height:none;transform:translateX(100%)}.search-panel{left:0;width:100%;transform:translateY(20px)}.channel-menu.is-open,.search-panel.is-open{transform:none}.channel-grid{grid-template-columns:1fr;padding:10px 20px 34px}.search-suggestions{grid-template-columns:1fr}.mobile-bottom{position:fixed;z-index:70;left:0;right:0;bottom:0;height:calc(58px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:rgba(255,255,255,.97);border-top:1px solid var(--grayline);align-items:stretch}.mobile-bottom a{flex:1;min-height:58px;display:grid;place-items:center;font-size:12px;color:var(--muted)}.mobile-bottom a.is-current{color:var(--blue);font-weight:800}.route-strip{margin-right:-15px;padding-right:15px}.app-visual{min-height:280px}.security-block:nth-child(2){transform:none}.brand-statement{padding:30px}.brand-statement h2{font-size:30px}}
@media(max-width:430px){.service-four,.rule-flow,.feedback-flow,.about-timeline,.footer-groups{grid-template-columns:1fr}.section-title{font-size:30px}.feature-topic h3{font-size:24px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
.long-read{display:grid;gap:18px}.long-read article{padding:30px;border-bottom:1px solid var(--grayline)}.long-read article h2{font-size:28px;color:var(--title);margin:8px 0}.long-read article:nth-child(odd){background:var(--sub);border-radius:18px;border-bottom:0}