:root{color-scheme:light;--paper:var(--zo-bg-primary);--surface:var(--zo-surface-primary);--ink:var(--zo-text-primary);--muted:var(--zo-text-secondary);--line:var(--zo-border-subtle);--accent:var(--zo-accent);--tint:var(--zo-surface-secondary);--shadow:0 18px 55px #294a3310;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Noto Sans CJK SC",sans-serif;font-synthesis:none}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);line-height:1.75}a{color:inherit;text-decoration:none}button,input{font:inherit}button,a,input{ -webkit-tap-highlight-color:transparent }button{cursor:pointer}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid var(--zo-accent);outline-offset:5px}a:hover{color:var(--accent)}button{color:inherit}h1,h2,h3,p{margin:0}h1,h2,h3{line-height:1.3;letter-spacing:-.025em}h1{font-size:clamp(2.1rem,4.4vw,4rem);font-weight:650}h2{font-size:clamp(1.5rem,2.5vw,2.05rem);font-weight:620}h3{font-size:1.15rem;font-weight:600}.community-header{max-width:1320px;margin:auto;height:94px;display:flex;align-items:center;gap:48px;padding:0 42px;border-bottom:1px solid var(--line)}.community-brand{display:flex;align-items:center;gap:12px;font-size:1.35rem;font-weight:650;white-space:nowrap;line-height:1.3}.brand-detail{display:block;font-size:11px;font-weight:450;color:var(--muted);letter-spacing:.06em;margin-top:3px}.community-header nav{display:flex;gap:30px;font-size:14px}.community-header nav a[aria-current]{color:var(--accent);font-weight:650}.header-actions{margin-left:auto;display:flex;align-items:center;gap:22px}.theme-toggle{background:none;border:0;font-size:25px;line-height:1}.button{display:inline-flex;align-items:center;justify-content:center;gap:16px;padding:12px 24px;background:var(--accent);color:var(--zo-on-accent);border:1px solid transparent;border-radius:9px;font-size:14px;font-weight:550;white-space:nowrap;transition:transform .15s}.button:hover{color:var(--zo-on-accent);transform:translateY(-2px)}.button.small{padding:9px 16px;font-size:13px}.nav-toggle{display:none}.community-main{max-width:1236px;padding:0 40px;margin:auto}.portal-hero{padding:86px 0 70px;display:grid;grid-template-columns:1.15fr 1fr;align-items:center;gap:58px}.eyebrow{font-size:11px;letter-spacing:.13em;color:var(--accent);font-weight:650;margin-bottom:18px}.portal-hero h1{font-size:clamp(2.7rem,4.6vw,4.4rem);letter-spacing:-.055em;line-height:1.22}.portal-hero h1 span{color:var(--accent)}.hero-intro{color:var(--muted);margin-top:24px;font-size:15px;line-height:1.95}.hero-buttons{display:flex;align-items:center;gap:25px;flex-wrap:wrap;margin-top:28px}.quiet-link{font-size:13px;font-weight:550;color:var(--accent)}.hero-tags{display:flex;gap:18px;margin-top:30px;font-size:10px;color:var(--muted)}.hero-tags span::before{content:'·';color:var(--accent);margin-right:6px}.hero-keyboard{display:block;background:linear-gradient(140deg,var(--zo-bg-secondary),var(--zo-surface-primary));border:1px solid var(--line);border-radius:20px;padding:22px;box-shadow:var(--shadow);transform:rotate(-3deg);color:var(--ink)}.hero-keyboard:hover{color:var(--ink);transform:rotate(-1deg)}.keyboard-caption{display:flex;justify-content:space-between;font-size:10px;color:var(--muted)}.keyboard-candidate{display:flex;align-items:center;gap:18px;padding:29px 3px 28px;font-size:22px}.keyboard-candidate .code{font-size:16px;letter-spacing:.03em;color:var(--muted)}.keyboard-candidate .muted{font-size:10px;color:var(--muted);margin-left:auto}.key-row{display:flex;gap:5px;margin-bottom:7px}.key-row.middle{margin-left:14px;margin-right:14px}.key-row.bottom{margin-left:45px;margin-right:45px}.key-row kbd{flex:1;aspect-ratio:1/1.08;display:flex;justify-content:center;align-items:center;border:1px solid var(--line);border-radius:6px;background:var(--zo-key-default);box-shadow:0 2px 0 var(--line);font-size:12px;font-family:inherit}.key-row kbd.active{background:var(--zo-candidate-selected);color:var(--zo-on-accent);border-color:var(--zo-candidate-selected);box-shadow:0 2px 0 var(--line)}.space-key{height:37px;margin:13px 45px 1px;background:var(--zo-key-default);border:1px solid var(--line);border-radius:6px;display:flex;align-items:center;justify-content:center;gap:30px;font-size:10px}.portal-section{padding:42px 0 36px;border-top:1px solid var(--line)}.section-title{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:28px}.section-title .eyebrow{margin-bottom:9px}.news-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.news-card{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:24px;display:flex;flex-direction:column}.story-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:10px;color:var(--muted);margin-bottom:16px}.story-meta span:first-child{color:var(--accent);font-weight:600}.news-card h3{line-height:1.55}.news-card>p{color:var(--muted);font-size:13px;line-height:1.9;margin:14px 0 22px}.story-bottom{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:10px}.save-story{border:0;background:none;font-size:11px;color:var(--muted);padding:6px}.save-story[aria-pressed=true]{color:var(--accent)}.empty-state{grid-column:1/-1;padding:34px 30px;border:1px dashed var(--line);border-radius:12px;display:grid;grid-template-columns:48px 1fr;column-gap:18px;align-items:center;background:var(--tint)}.empty-mark{grid-row:1/4;align-self:center;font-size:29px;color:var(--accent);font-weight:650}.empty-state h3{font-size:15px}.empty-state p{font-size:12px;color:var(--muted);margin-top:6px}.empty-state a{font-size:12px;color:var(--accent);margin-top:8px}.guide-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}.guide-card{padding:26px 28px;border:1px solid var(--line);border-radius:10px;background:var(--surface);transition:border-color .15s}.guide-card:hover{border-color:var(--accent)}.guide-card .eyebrow{font-size:9px;display:block;margin-bottom:12px}.guide-card h3{font-size:18px}.guide-card p{font-size:13px;line-height:1.8;color:var(--muted);margin:12px 0 18px}.topic-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}.topic-card{padding:26px 22px;border:1px solid var(--line);border-radius:10px;background:var(--tint)}.topic-icon{display:flex;align-items:center;justify-content:center;width:39px;height:39px;border:1px solid var(--line);background:var(--surface);border-radius:10px;color:var(--accent);font-weight:600;margin-bottom:21px}.topic-card h3{font-size:16px}.topic-card p{color:var(--muted);font-size:12px;margin:12px 0 18px;line-height:1.9}.topic-card .quiet-link{font-size:11px}.product-band{display:flex;align-items:center;justify-content:space-between;gap:40px;background:var(--tint);border-radius:16px;padding:42px;margin:40px 0 76px}.product-band h2{font-size:26px}.product-band p:not(.eyebrow){color:var(--muted);font-size:14px;margin-top:15px}.product-band-mark{font-size:100px;line-height:1;color:color-mix(in srgb,var(--zo-candidate-selected) 20%,transparent);font-weight:750;letter-spacing:-.1em;margin-right:20px}.community-footer{max-width:1236px;margin:auto;border-top:1px solid var(--line);padding:35px 40px 28px;display:grid;grid-template-columns:1fr auto;gap:24px}.community-footer .community-brand{font-size:16px}.community-footer p{color:var(--muted);font-size:11px;margin-top:12px}.community-footer nav{display:flex;gap:20px;font-size:12px}.community-footer .footer-bottom{grid-column:1/-1;font-size:10px;border-top:1px solid var(--line);padding-top:20px;margin-top:4px}.page-heading{padding:65px 0 42px;max-width:800px}.page-heading>p:not(.eyebrow){color:var(--muted);font-size:16px;margin-top:20px}.page-heading>.button{margin-top:26px}.news-search{display:flex;gap:12px;max-width:660px;margin-bottom:28px}.news-search input{flex:1;min-width:0;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--ink);padding:12px 16px;font-size:14px}.news-controls{display:flex;gap:20px;align-items:center;border-bottom:1px solid var(--line);padding:0 0 18px;font-size:12px;color:var(--muted)}.news-controls nav{display:flex;gap:22px}.news-controls a[aria-current]{color:var(--accent);font-weight:650}.news-controls>span{margin-left:auto;font-size:11px}.topic-filters{display:flex;gap:10px;flex-wrap:wrap;margin:20px 0 30px}.topic-filters a{font-size:11px;padding:6px 12px;border:1px solid var(--line);border-radius:6px}.news-list~.saved-stories{margin-top:35px}.news-list{margin-bottom:35px}.reading-article{max-width:760px;margin:auto;padding:55px 0 50px}.breadcrumb{font-size:12px;color:var(--muted);display:inline-block;margin-bottom:35px}.reading-article h1{font-size:clamp(28px,3.7vw,44px);line-height:1.45}.article-summary{font-size:19px;line-height:1.8;color:var(--muted);margin-top:25px}.article-provenance{display:flex;justify-content:space-between;gap:20px;padding:18px 0;border-block:1px solid var(--line);margin:30px 0;font-size:12px;color:var(--muted)}.article-body p{font-size:17px;line-height:2.05;margin:26px 0}.reading-aside{background:var(--tint);border-radius:12px;padding:26px 30px;margin-top:36px}.reading-aside h2{font-size:17px;margin-bottom:12px}.reading-aside a{display:block;font-size:13px;color:var(--accent);margin-top:8px}.reading-aside p{font-size:12px;color:var(--muted);margin-top:14px}.share-row{display:flex;gap:20px;margin-top:25px}.share-row button{border:1px solid var(--line);background:var(--surface);border-radius:7px;padding:9px 15px;font-size:12px}.learning-path{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-bottom:35px}.learning-path article{border-top:1px solid var(--line);padding:25px 0}.learning-path span{font-size:14px;color:var(--accent)}.learning-path h2{font-size:20px;margin:18px 0 12px}.learning-path p{font-size:14px;color:var(--muted)}.practice-panel{display:grid;grid-template-columns:1fr 1fr;gap:60px;background:var(--tint);padding:36px;border-radius:12px;margin:30px 0 45px}.practice-panel h2{font-size:23px}.practice-panel p{font-size:13px;color:var(--muted);margin-top:16px}.practice-widget{background:var(--surface);padding:20px 24px;border-radius:10px}.practice-widget .practice-question{margin-top:0;color:var(--ink)}.practice-options{display:flex;gap:12px;margin-top:20px}.practice-options button{flex:1;background:var(--paper);border:1px solid var(--line);border-radius:6px;padding:10px}.practice-options button.selected{border-color:var(--accent);color:var(--accent);background:var(--tint)}.update-caption{font-size:11px;color:var(--muted);margin-bottom:17px}.service-notice{margin-top:25px;padding:14px 20px;border:1px solid var(--line);border-radius:8px;font-size:13px;background:var(--tint)}.report-week{font-size:12px;color:var(--accent);margin:20px 0 10px}.toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);background:var(--ink);color:var(--paper);padding:10px 18px;border-radius:8px;font-size:13px;opacity:0;pointer-events:none;transition:opacity .15s}.toast.shown{opacity:1}.sr-only,.skip-link:not(:focus){position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}.skip-link:focus{position:fixed;z-index:10;background:var(--surface);padding:10px}
@media(max-width:1050px){.community-header{gap:30px;padding-inline:30px}.community-header nav{gap:20px}.portal-hero{gap:30px}.hero-keyboard{padding:18px}.keyboard-candidate .muted{display:none}.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.news-list{grid-template-columns:repeat(2,minmax(0,1fr))}.portal-hero h1{font-size:44px}.hero-tags{gap:10px}}
@media(max-width:720px){.community-header{height:75px;padding:0 20px;gap:18px;position:relative}.community-brand{font-size:19px;gap:9px}.community-brand img{width:30px;height:30px}.brand-detail{font-size:9px}.header-actions{gap:13px}.button.small{font-size:11px;padding:8px 11px}.theme-toggle{font-size:22px}.nav-toggle{display:block;background:none;border:0;font-size:12px;margin-left:auto;padding:5px}.community-header nav{display:none;position:absolute;top:74px;left:0;right:0;z-index:5;background:var(--surface);padding:20px;box-shadow:var(--shadow);border-bottom:1px solid var(--line);gap:25px;flex-wrap:wrap}.community-header nav.open{display:flex}.header-actions{margin-left:0}.community-main{padding:0 22px}.portal-hero{grid-template-columns:1fr;padding:48px 0 38px;gap:38px}.portal-hero h1{font-size:43px}.hero-intro{font-size:14px;margin-top:20px}.hero-buttons{gap:21px;margin-top:25px}.hero-tags{font-size:9px;gap:14px}.hero-keyboard{max-width:460px;width:100%;margin:0 auto;transform:rotate(-2deg);padding:20px}.keyboard-candidate{padding:20px 2px}.keyboard-caption{font-size:9px}.keyboard-candidate .muted{display:block;font-size:8px}.key-row kbd{min-height:30px;font-size:11px}.key-row.bottom{margin-inline:35px}.portal-section{padding:32px 0 25px}.section-title{margin-bottom:22px;gap:15px}.section-title h2{font-size:24px}.section-title .quiet-link{font-size:11px}.guide-grid,.news-list{grid-template-columns:1fr}.guide-card{padding:23px}.guide-card h3{font-size:17px}.guide-card p{font-size:12px}.topic-grid{gap:12px}.topic-card{padding:21px 17px}.topic-card h3{font-size:15px}.topic-card p{font-size:11px}.product-band{padding:28px 23px;margin:30px 0 45px;gap:0}.product-band h2{font-size:23px}.product-band-mark{display:none}.product-band p:not(.eyebrow){font-size:12px}.community-footer{padding:28px 22px;grid-template-columns:1fr;gap:20px}.community-footer nav{flex-wrap:wrap;gap:18px}.page-heading{padding:42px 0 28px}.page-heading h1{font-size:32px}.page-heading>p:not(.eyebrow){font-size:14px}.news-controls{flex-wrap:wrap;gap:18px}.news-controls>span{margin-left:0;width:100%}.empty-state{padding:26px 20px;grid-template-columns:35px 1fr;gap:4px 12px}.empty-state p{font-size:11px}.empty-mark{font-size:24px}.reading-article{padding-top:35px}.article-summary{font-size:17px}.article-body p{font-size:16px}.article-provenance{flex-wrap:wrap}.learning-path{grid-template-columns:1fr;gap:0}.learning-path article{display:grid;grid-template-columns:32px 1fr;column-gap:12px;padding:22px 0}.learning-path h2{margin:0 0 8px}.learning-path p{grid-column:2}.practice-panel{grid-template-columns:1fr;gap:24px;padding:25px}.practice-panel h2{font-size:21px}.reading-aside{padding:23px}.news-search{gap:8px}.news-search .button{padding-inline:19px}.news-search input{font-size:12px}.desktop-break{display:none}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}

/* Reading layout follows AIHOT's dated feed and navigation rail, using ZeroOne palette tokens. */
.newsroom-layout{display:grid;grid-template-columns:172px minmax(0,1fr) 244px;gap:30px;padding:38px 0 60px;align-items:start}.newsroom-nav{position:sticky;top:28px}.newsroom-nav nav{display:flex;flex-direction:column;gap:5px}.newsroom-nav nav a{display:flex;gap:12px;align-items:center;padding:11px 12px;font-size:14px;border-radius:9px}.newsroom-nav nav a[aria-current]{background:var(--zo-surface-secondary);color:var(--zo-accent);font-weight:650}.rail-section{border-top:1px solid var(--zo-border-subtle);margin-top:24px;padding-top:20px}.rail-section p{font-size:11px;color:var(--muted);margin-bottom:10px}.rail-section>a{display:flex;justify-content:space-between;font-size:11px;padding:8px 3px}.rail-section>a span{color:var(--muted)}.rail-product{border-top:1px solid var(--line);padding-top:25px;margin-top:25px}.rail-product h2{font-size:23px;line-height:1.4}.rail-product p{font-size:11px;color:var(--muted);margin:12px 0}.rail-product .eyebrow{font-size:9px}.newsroom-content{min-width:0}.newsroom-heading{padding:0 0 22px}.newsroom-heading .eyebrow{margin-bottom:8px;font-size:10px}.newsroom-heading h1{font-size:28px;font-weight:650;letter-spacing:-.04em}.newsroom-heading>p:last-child{font-size:12px;color:var(--muted);margin-top:10px}.news-search{margin:0 0 16px}.news-search input{font-size:12px;padding:11px 15px}.news-search .button{padding:9px 17px;font-size:12px}.topic-filters{gap:6px;flex-wrap:wrap;margin:0 0 18px}.topic-filters a{font-size:10px;padding:6px 9px;border-radius:6px}.topic-filters a[aria-current]{background:var(--zo-surface-secondary);color:var(--zo-accent);border-color:var(--zo-accent)}.news-controls{margin-bottom:22px;gap:12px}.news-controls a,.news-controls span{font-size:10px}.news-controls>span{margin-left:auto}.home-quick-links{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:24px}.home-quick-links a{padding:14px 16px;background:var(--zo-surface-secondary);border:1px solid var(--line);border-radius:9px;display:flex;flex-direction:column;gap:5px}.home-quick-links span{font-size:10px;color:var(--muted)}.home-quick-links strong{font-size:12px;font-weight:550}.day-label{display:flex;align-items:center;gap:12px;font-size:16px;margin:20px 0 12px}.day-label span{font-size:10px;font-weight:400;color:var(--muted);letter-spacing:0}.timeline-day ol{padding:0;margin:0;list-style:none}.timeline-slot{display:grid;grid-template-columns:42px 14px minmax(0,1fr);gap:5px;position:relative;padding-bottom:12px}.timeline-clock{font-size:10px;font-variant-numeric:tabular-nums;color:var(--muted);padding-top:20px}.timeline-node{position:relative}.timeline-node:before{content:'';position:absolute;top:24px;left:4px;width:6px;height:6px;border-radius:50%;background:var(--zo-accent)}.timeline-node:after{content:'';position:absolute;top:35px;bottom:-18px;left:6px;width:1px;background:var(--line)}.timeline-slot:last-child .timeline-node:after{display:none}.news-card{padding:17px 20px;border:1px solid var(--line);border-radius:10px;background:var(--zo-surface-primary);box-shadow:none}.news-card h3{font-size:16px;line-height:1.55;letter-spacing:-.015em;margin:9px 0}.news-card>p{font-size:12px;line-height:1.85;color:var(--muted)}.story-meta{gap:10px;font-size:9px;flex-wrap:wrap}.story-bottom{margin-top:15px}.story-bottom .quiet-link,.save-story{font-size:10px}.newsroom-aside{display:flex;flex-direction:column;gap:22px}.aside-module{border:1px solid var(--line);border-radius:11px;padding:20px;background:var(--zo-surface-primary)}.aside-module .eyebrow{font-size:9px;margin-bottom:7px}.aside-module h2{font-size:17px;margin-bottom:15px}.aside-topic{display:flex;flex-direction:column;gap:5px;padding:12px 0;border-top:1px solid var(--line)}.aside-topic strong{font-size:12px;font-weight:550}.aside-topic span{font-size:10px;color:var(--muted);line-height:1.7}.aside-guide{display:block;border-top:1px solid var(--line);padding:12px 0;font-size:11px;line-height:1.8}.aside-subscribe{font-size:13px;background:var(--zo-surface-secondary);padding:20px;border-radius:10px;display:flex;flex-direction:column;gap:8px}.aside-subscribe span{font-size:10px;color:var(--muted)}.feed-more{display:block;text-align:center;font-size:12px;padding:25px;border-bottom:1px solid var(--line)}.reading-article{padding-top:0}.reading-article h1{font-size:32px}.article-summary{font-size:17px}.article-body p{font-size:15px}.newsroom-content .page-heading{padding-top:0}.newsroom-content .page-heading h1{font-size:32px}.newsroom-content .guide-grid,.newsroom-content .topic-grid{grid-template-columns:1fr 1fr}.saved-stories ul{list-style:none;margin:0;padding:0}.saved-stories li{border-bottom:1px solid var(--line);padding:16px 0;font-size:14px}.saved-stories>p{font-size:12px;color:var(--muted);margin-top:20px}
@media(max-width:1100px){.newsroom-layout{grid-template-columns:150px minmax(0,1fr);gap:26px}.newsroom-aside{display:none}}
@media(max-width:720px){.newsroom-layout{grid-template-columns:minmax(0,1fr);gap:22px;padding-top:22px}.newsroom-nav{position:static}.newsroom-nav>.eyebrow,.rail-section,.rail-product{display:none}.newsroom-nav nav{flex-direction:row;gap:4px;overflow-x:auto;padding-bottom:7px}.newsroom-nav nav a{font-size:0;white-space:nowrap;padding:8px 10px;gap:0}.newsroom-nav nav a span{font-size:11px}.newsroom-heading h1{font-size:26px}.newsroom-heading .eyebrow{font-size:9px}.news-controls{flex-wrap:wrap}.news-controls>span{width:auto;margin-left:0}.news-controls>a:last-child{margin-left:auto}.timeline-slot{grid-template-columns:1fr;gap:0;padding-bottom:14px}.timeline-clock{padding-top:0;margin-bottom:7px}.timeline-node{display:none}.news-card{padding:17px}.news-card h3{font-size:16px}.newsroom-content .guide-grid,.newsroom-content .topic-grid{grid-template-columns:1fr}.newsroom-content .page-heading h1,.reading-article h1{font-size:28px}.home-quick-links a{padding:12px}.home-quick-links strong{font-size:10px}.home-quick-links span{font-size:9px}}

.newsroom-layout .news-card{min-height:0;display:block}.newsroom-layout .news-card h3{font-size:18px}.newsroom-layout .news-card>p{font-size:14px}.newsroom-layout .story-meta{font-size:11px}.newsroom-layout .story-bottom{padding-top:0}.newsroom-layout .story-bottom .quiet-link,.newsroom-layout .save-story{font-size:11px}.newsroom-heading>p:last-child{font-size:14px}.rail-section>a{font-size:12px}.aside-topic strong,.aside-guide{font-size:12px}.aside-topic span{font-size:11px}

.feed-pagination{display:flex;justify-content:space-between;gap:24px;padding:28px 0;font-size:13px;border-top:1px solid var(--line)}