/* AI4S / Frontier — an original, Antigravity-inspired visual layer.
   Author here, then run node tools/build-frontier.mjs. Immutable assets stay untouched. */
:root {
  --bg:#101114;--bg-2:#17181d;--surface:#191b21;--surface-2:#202229;--surface-hover:#24272f;
  --text:#f4f4f7;--text-2:#b3b5c0;--text-3:#9195a6;--line:#ffffff12;--line-strong:#ffffff25;
  --accent:#9dafff;--accent-strong:#c3cdff;--accent-ink:#101329;--accent-soft:#a0b1ff12;
  --header-bg:#101114e8;--radius-md:20px;--radius-lg:24px;
  --font-display:var(--font-body);--shadow-sm:none;--shadow-md:0 16px 40px -24px #0006;
  --hero-ink:#f3f4f7;--pill:#f3f4f7;--pill-text:#15161a;--hero-halo:#101114;
  /* Reading text keeps its semantic size at every breakpoint. Decorative art stays independent. */
  --type-body:15px;--type-detail:13px;--type-meta:12px;--type-input:16px;
}
[data-theme="light"] {
  --bg:#fff;--bg-2:#f7f8fa;--surface:#fff;--surface-2:#f6f7fa;--surface-hover:#fbfcff;
  --text:#191a20;--text-2:#646772;--text-3:#696e7b;--line:#e9eaf0;--line-strong:#d5d8e2;
  --accent:#4668d9;--accent-strong:#284cbc;--accent-ink:#fff;--accent-soft:#476ce90b;
  --header-bg:#fffffff0;--shadow-sm:none;--shadow-md:0 20px 48px -30px #30468535;
  --hero-ink:#202127;--pill:#202127;--pill-text:#fff;--hero-halo:#fff;
}
body::before{display:none}
.reading-progress{width:100%;transform:scaleX(0);transform-origin:left;transition:none}
html{scroll-padding-top:100px}
.container{max-width:1392px;padding-inline:48px}
.skip-link{position:fixed;top:12px;left:16px;z-index:10001;padding:12px 20px;background:var(--pill);color:var(--pill-text);border-radius:30px;transform:translateY(-180%)}
.skip-link:focus{transform:none}
.ticker-bar[hidden]{display:none}
.header{border-bottom-color:transparent;backdrop-filter:blur(20px)}
.header.scrolled{border-bottom-color:var(--line);box-shadow:none}
.header .container{height:84px;max-width:1600px;gap:48px}
.logo-icon{background:none;box-shadow:none;width:34px;height:40px}
.logo-icon img{width:34px;height:34px}
.logo-text strong{font-weight:550;font-size:21px;letter-spacing:-.04em}
.logo-text span{display:none}
.main-nav{gap:24px;margin-right:auto;margin-left:8px}
.main-nav a{font-size:14px;padding:10px 0;color:var(--text-2);font-weight:450}
.main-nav a span{margin-left:3px;color:var(--text-3)}
.main-nav a:hover{background:transparent;color:var(--text)}
.main-nav a.nav-active::after{display:none}
.header-actions{gap:8px}
.icon-btn{border-radius:50%;width:38px;height:38px}
.sub-cta{background:var(--pill);color:var(--pill-text);height:42px;padding:0 23px;border-radius:99px;font-weight:500;font-size:13px;margin-left:8px}
.sub-cta svg{display:none}
.sub-cta:hover{background:var(--text-2);transform:translateY(-1px)}
.frontier{position:relative;isolation:isolate;min-height:650px;height:calc(100svh - 84px);max-height:1040px;overflow:hidden;display:flex;align-items:center;justify-content:center;padding:68px 24px 116px;background:var(--bg)}
#frontierCanvas{position:absolute;inset:0;width:100%;height:100%;z-index:-2;pointer-events:none}
.frontier-halo{position:absolute;inset:12% 20% 18%;z-index:-1;pointer-events:none;background:radial-gradient(ellipse,var(--hero-halo) 28%,transparent 72%);opacity:.86}
.frontier-content{text-align:center;position:relative;width:100%;pointer-events:none}
.frontier-content a,.frontier-content button{pointer-events:auto}
.frontier-eyebrow{display:flex;align-items:center;justify-content:center;gap:10px;font-size:11px;font-weight:550;letter-spacing:.21em;color:var(--text-2);margin-bottom:30px;animation:frontier-enter 1s var(--ease) both}
.frontier-spark{font-size:27px;color:#587bea;line-height:1;animation:spark-turn 24s linear infinite}
.frontier h1{font-size:clamp(75.6px,6.5vw,104px);font-weight:480;line-height:1.24;letter-spacing:-.065em;color:var(--hero-ink);text-wrap:balance;animation:frontier-enter 1.2s var(--ease) .08s both}
.frontier h1>span{background:linear-gradient(112deg,#598de8 0%,#5366d4 45%,#9177c9 78%,#b07e99 100%);background-clip:text;-webkit-background-clip:text;color:transparent}
[data-theme="dark"] .frontier h1>span{background-image:linear-gradient(112deg,#97beff,#a0a4ff 50%,#d6ace1)}
.frontier-description{margin:26px auto 0;font-size:16px;line-height:1.85;color:var(--text-2);letter-spacing:.025em;animation:frontier-enter 1.2s var(--ease) .16s both}
.mobile-break{display:none}
.frontier-actions{display:flex;align-items:center;justify-content:center;gap:12px;margin-top:35px;animation:frontier-enter 1.2s var(--ease) .24s both}
.frontier-button{height:54px;padding:0 27px;border-radius:99px;display:inline-flex;align-items:center;justify-content:center;gap:24px;font-size:14px;font-weight:500;letter-spacing:.01em;transition:transform .3s var(--ease),box-shadow .3s,background .3s}
.frontier-button svg{width:18px;height:18px;transition:transform .3s}
.frontier-button.primary{background:var(--pill);color:var(--pill-text)}
.frontier-button.secondary{background:var(--surface-2);color:var(--text);border:1px solid var(--line);gap:16px}
.frontier-button:hover{transform:translateY(-3px);box-shadow:0 10px 24px -12px #334d8e55}
.frontier-button:hover svg{transform:translateX(3px)}
.frontier-note{display:flex;justify-content:center;align-items:center;gap:12px;margin-top:22px;color:var(--text-3);font-size:11px;letter-spacing:.035em;animation:frontier-enter 1.2s var(--ease) .32s both}
.frontier-note i{width:2px;height:2px;border-radius:50%;background:var(--text-3)}
.frontier-bottom{position:absolute;bottom:32px;left:48px;right:48px;display:flex;align-items:center;justify-content:space-between;font-size:10px;color:var(--text-3);letter-spacing:.1em}
.scroll-cue{display:flex;align-items:center;gap:12px}
.scroll-line{display:block;width:30px;height:1px;background:var(--line-strong)}
.scroll-cue>span:last-child{font-size:17px;color:var(--text-2);transition:transform .3s}
.scroll-cue:hover>span:last-child{transform:translateY(4px)}
.frontier-controls{display:flex;align-items:center;gap:14px}
#motionToggle{display:grid;place-items:center;width:32px;height:32px;border:1px solid var(--line-strong);border-radius:50%;color:var(--text-2)}
#motionToggle:hover{background:var(--surface-2)}
#motionToggle svg{width:16px;height:16px;grid-area:1/1}
#motionToggle .motion-play{display:none}
#motionToggle[aria-pressed="true"] .motion-play{display:block}
#motionToggle[aria-pressed="true"] .motion-pause{display:none}
@keyframes frontier-enter{from{opacity:0;transform:translateY(22px)}to{opacity:1;transform:none}}
@keyframes spark-turn{to{transform:rotate(360deg)}}
.source-ribbon{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:30px 0;background:var(--bg)}
.source-ribbon .container{display:flex;align-items:center;justify-content:space-between;gap:36px}
.ribbon-caption{font-size:12px;white-space:nowrap;color:var(--text-2)}
.ribbon-caption>span{display:block;font-size:8px;letter-spacing:.11em;margin-top:5px;color:var(--text-3)}
.journal-wordmarks{display:flex;align-items:center;justify-content:space-evenly;flex:1;gap:30px;color:var(--text-2)}
.journal-nature{font:32px Georgia,serif;letter-spacing:-2px}
.journal-science{font:italic 29px Georgia,serif;letter-spacing:-1.5px}
.journal-cell{font:italic 600 30px Georgia,serif;letter-spacing:-2px}
.journal-biorxiv{font:26px Georgia,serif;letter-spacing:-1px}
.journal-biorxiv>span{color:var(--text-3)}
.journal-elife{font-size:28px;font-weight:550;letter-spacing:-2px}
.ribbon-more{font-size:11px;white-space:nowrap;color:var(--text-3)}
.ribbon-more span{margin-left:8px}
.section-eyebrow{display:block;font:10px var(--font-mono);letter-spacing:.18em;color:var(--text-3);margin-bottom:17px}
.discover-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px}
.discover-heading h2{font-size:clamp(27px,3vw,42px);font-weight:500;letter-spacing:-.05em;line-height:1.35}
.text-link{display:inline-flex;align-items:center;gap:18px;font-size:13px;color:var(--text-2);white-space:nowrap;transition:color .2s}
.text-link:hover{color:var(--accent)}
.text-link>span{font-size:20px}
.hero-section{padding:88px 0 0;scroll-margin-top:8px}
.feed-status{display:flex;gap:18px;align-items:center;margin-bottom:20px;font-size:11px;color:var(--text-3);min-height:30px}
.feed-status .live{display:inline-flex;align-items:center;gap:8px;color:var(--text-2)}
.feed-status .live-dot{background:#789c8b;width:5px;height:5px}
.feed-status #lastUpdated{margin-left:auto;font-size:10px}
.refresh-btn{display:block;border:0;margin:0;padding:0 0 0 12px;height:28px;border-left:1px solid var(--line);border-radius:0;font-size:11px;font-weight:400}
.hero-grid{grid-template-columns:minmax(0,1.9fr) minmax(300px,1fr);gap:28px}
.hero-main{height:380px;background:var(--bg-2);border:0;box-shadow:none}
.hero-copy{padding:34px 8px 34px 32px}
.hero-copy h2{font-family:var(--font-body);font-size:27px;font-weight:520;letter-spacing:-.04em;line-height:1.35;-webkit-line-clamp:4}
.hero-copy p,.hero-copy .zh-sum{font-size:var(--type-body);line-height:1.8;color:var(--text-2);-webkit-line-clamp:3}
.hero-meta{font-size:var(--type-meta);gap:8px;flex-wrap:wrap}
.hero-meta .read{padding-right:8px;font-size:10px}
.hero-meta .source{font-weight:500}
.hero-art{background:var(--bg-2);opacity:.86}
.hero-dots{left:32px;bottom:9px}
.hero-dot{width:19px}
.hero-dot::before{height:2px}
.hero-side{background:transparent;border:0;border-radius:0;box-shadow:none}
.hero-side .block-head{padding:0 0 12px}
.block-head span{font-weight:550}
.block-head small{font-size:9px}
.side-item{padding:15px 0;gap:16px}
.side-item:hover{background:transparent}
.side-num{color:var(--text-3);font-size:10px;font-weight:400}
.side-item h3{font-size:14px;font-weight:500;line-height:1.6}
.side-item h3[lang="en"]{font-family:var(--font-body);font-size:14px}
.side-meta .cat-label{font-size:10px}
.side-src{font-size:9px}
.hero-side-list{padding:0}
.brief-section{padding-top:34px}
.brief-grid{grid-template-columns:minmax(0,1fr) 340px;gap:28px}
.brief-panel{min-width:0;border-color:var(--line);border-radius:24px;padding:10px 0}
.brief-head{border-bottom:0;padding:16px 24px}
.brief-head h2{font-size:17px;font-weight:550;letter-spacing:-.02em}
.brief-head small{font-size:10px}
.brief-count{font-size:10px;color:var(--text-3)}
.brief-item{min-width:0;padding:15px 24px;border-bottom-style:solid}
.brief-body h3,.brief-body h3[lang="en"]{font-family:var(--font-body);font-size:var(--type-body);font-weight:450;line-height:1.7}
.brief-meta{font-size:10px;gap:8px;margin-top:4px}
.brief-meta .cat-label{font-size:10px}
.brief-num{font-size:10px;font-weight:400}
.sub-card{background:var(--bg-2);border:0;padding:30px 26px;border-radius:24px}
.sub-kicker{font-size:9px;color:var(--text-3)}
.sub-card h3{font-size:24px;font-weight:500;letter-spacing:-.04em;margin:14px 0 12px}
.sub-card p{font-size:var(--type-body);line-height:1.8}
.sub-gift{font-size:11px;font-weight:400;color:var(--accent);margin-bottom:18px}
.sub-card .sub-input{height:44px;border:1px solid var(--line-strong);border-radius:99px;padding-inline:18px;background:var(--surface);font-size:var(--type-input)}
.btn-sub{background:var(--pill);color:var(--pill-text);border-radius:99px;font-weight:450}
.btn-sub:hover{background:var(--text-2)}
.sub-card .btn-sub{height:44px;font-size:12px}
.sub-points{font-size:10px;gap:5px}
.sub-points li::before{background:var(--text-3);width:3px;height:3px}
.wx-card{padding:18px 22px;border:0;border-radius:20px;background:var(--bg-2)}
.wx-card img{width:70px;height:70px}
.wx-card b{font-size:13px;font-weight:500}
.wx-card p{font-size:11px}
.wx-card .wx-kicker{font-size:9px;font-weight:500;color:var(--text-3)}
.brief-aside .sidebar-block{border:0;background:var(--bg-2);border-radius:20px}
.orig-section{padding-top:88px}
.section-title{font-size:30px;font-weight:500;letter-spacing:-.045em;gap:12px}
.section-count{font-size:11px;letter-spacing:0}
.orig-follow{background:transparent;border-color:var(--line-strong);color:var(--text-2);font-size:11px;font-weight:400}
.orig-list{gap:24px;margin-top:28px}
.orig-card{border:0;border-radius:20px;background:var(--bg-2)}
.orig-thumb{aspect-ratio:16/9}
.orig-body{padding:20px 22px 24px;gap:10px}
.orig-card h3{font-size:16px;font-weight:550;line-height:1.65}
.orig-card p{font-size:var(--type-body);line-height:1.8}
.orig-meta{font-size:10px}
.orig-type{font-weight:500}
.category-section{padding-top:88px}
.category-section .section-count{display:block;flex-basis:100%;margin-top:6px}
.category-tabs{gap:4px;border-bottom:1px solid var(--line);padding-bottom:18px;margin-top:26px;margin-bottom:28px}
.cat-tab{border:0;background:transparent;font-size:12px;height:38px;padding:0 15px;gap:7px;font-weight:450}
.cat-tab.active{background:var(--pill);color:var(--pill-text)}
.cat-tab.active .ct-count{color:inherit;opacity:.7}
.cat-tab .ct-count{font-size:9px}
.cat-tab .dot{width:5px;height:5px}
.content-layout{grid-template-columns:minmax(0,1fr) 280px;gap:32px}
/* Native email inputs must not impose their intrinsic width on the news grid. */
.news-grid{gap:20px;min-width:0}
.news-grid>*{min-width:0}
.news-card{padding:25px 26px 20px;border-radius:20px;background:var(--bg-2);border-color:transparent;box-shadow:none;animation:none}
.news-card:hover{transform:translateY(-4px);background:var(--surface-hover);border-color:var(--line-strong);box-shadow:var(--shadow-md)}
.news-card h3{font-family:var(--font-body);font-size:17px;line-height:1.5;font-weight:500;letter-spacing:-.025em}
.news-card p,.news-card .zh-sum{font-size:var(--type-body);line-height:1.8}
.news-card.featured{padding:30px 30px 24px}
.news-card.featured::before{display:none}
.news-card.featured h3{font-size:24px}
.news-card.featured .zh-sum{font-size:var(--type-body)}
.card-top{margin-bottom:16px}
.card-top time,.news-card-footer{font-size:10px}
.cat-label{font-size:10px;font-weight:500;gap:6px}
.cat-label .dot{width:5px;height:5px}
.cat-label em{font-size:8px}
.news-card-footer{margin-top:20px;padding-top:16px}
.news-card-footer .author{font-weight:450}
.news-card .read{opacity:1;transform:none}
.acc{font-size:9px;font-weight:450}
.sub-band{background:transparent;border:1px solid var(--line-strong);border-radius:20px;padding:26px;animation:none}
.sub-band-copy strong{font-size:17px;font-weight:500}
.sub-band-copy span{font-size:var(--type-detail);line-height:1.8}
.sub-band .sub-input{border-radius:99px;font-size:var(--type-input)}
.sidebar-block{border:0;background:transparent;border-radius:0}
.sidebar .block-head{padding:0 0 18px}
.hot-item{padding:18px 0}
.hot-item:hover{background:transparent}
.hot-item h4,.hot-item h4:not([lang="en"]){font-family:var(--font-body);font-size:12px;line-height:1.8;font-weight:450}
.hot-item .views{font-size:10px}
.topic-tag{font-size:10px;border-color:var(--line);background:var(--surface);padding:6px 10px}
.sources-section{padding:30px 0 80px}
.sources-banner{grid-template-columns:1fr 1.5fr;gap:60px;background:var(--bg-2);border:0;padding:52px;border-radius:28px}
.sources-intro h2{font-size:32px;font-weight:500;letter-spacing:-.04em;line-height:1.45;margin-bottom:18px}
.sources-intro p{font-size:var(--type-body);line-height:1.8}
.source-chip{font-size:10px;border:0;background:var(--surface);height:30px}
.source-chip em{font-size:9px}
.source-chips{gap:8px}
.site-footer{padding-top:64px;border:0}
.footer-statement{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:70px}
.footer-statement>span{font-size:clamp(60px,7vw,100px);letter-spacing:-.065em;line-height:1.04;font-weight:450}
.footer-statement>div{font-size:18px;font-weight:400;color:var(--text-2)}
.footer-statement .text-link{margin-top:18px}
.footer-brand h3{font-size:18px;font-weight:500}
.footer-brand p,.footer-col a,.footer-col span{font-size:11px;line-height:1.9}
.footer-col h4{font-size:11px;font-weight:550}
.footer-bottom{font-size:10px}
.back-to-top{border-radius:50%;box-shadow:none}
/* Pause decoration, never freeze content at a transparent entrance keyframe. */
.motion-paused :is(.frontier-spark,.live-dot,.ticker-track){animation-play-state:paused!important}
.motion-paused .frontier-content>*,
.motion-paused .hero-slide.active :is(.hero-kicker,h2,p){animation:none!important;opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  .hero-slide.active :is(.hero-kicker,h2,p){animation:none!important;opacity:1;transform:none}
}
@media(min-width:1600px){.frontier{padding-bottom:140px}.frontier-eyebrow{margin-bottom:38px}.frontier-description{margin-top:34px;font-size:18px}.frontier-actions{margin-top:42px}.frontier-button{height:60px;font-size:16px;padding-inline:32px}}
@media(max-width:1200px){
  .header .container{gap:28px}.main-nav{gap:20px}.main-nav a{font-size:12px}
  .hero-grid{gap:24px;grid-template-columns:minmax(0,1.6fr) minmax(290px,1fr)}
  .hero-copy{padding:28px 8px 32px 26px}.hero-copy h2{font-size:23px}.hero-main{height:360px}
  .hero-lead{grid-template-columns:1.4fr 1fr}.hero-meta .read{display:none}
  .brief-grid{grid-template-columns:minmax(0,1fr) 300px}.brief-list{grid-template-columns:minmax(0,1fr)}
  .brief-item{padding-block:12px}.brief-item:nth-child(n+7){display:none}.brief-list.expanded .brief-item{display:flex}.brief-panel>.more-btn{display:flex}
  .content-layout{grid-template-columns:minmax(0,1fr) 240px;gap:24px}
  .source-ribbon .container{gap:28px}.journal-wordmarks{gap:25px}.ribbon-more{display:none}
}
@media(min-width:901px) and (max-width:1100px){
  .main-nav{display:flex}.icon-btn.menu{display:none}.header .container{gap:24px}.header-actions{gap:2px}.sub-cta{padding-inline:18px}
  .hero-side-list{display:flex}.side-item:nth-child(odd){border-right:0}.side-item:nth-last-child(-n+2){border-bottom:1px solid var(--line)}.side-item:last-child{border-bottom:0}
  .sidebar{display:flex;position:sticky;top:100px}.category-tabs{position:static;box-shadow:none;margin-inline:0;padding-inline:0}
}
@media(max-width:900px){
  .container{padding-inline:28px}.header .container{height:72px;gap:16px}.main-nav{display:none}.icon-btn.menu{display:grid}.header-actions{margin-left:auto}
  .frontier{height:calc(100svh - 72px);min-height:620px}.frontier h1{font-size:clamp(64px,8.4vw,75.6px)}
  .frontier-bottom{left:28px;right:28px}.frontier-halo{inset:12% 10% 18%}
  .journal-wordmarks{gap:20px}.journal-nature{font-size:28px}.journal-science{font-size:25px}.journal-cell{font-size:27px}.journal-biorxiv{font-size:23px}.journal-elife{font-size:25px}
  .ribbon-caption>span{display:none}.ribbon-caption{font-size:11px}
  .hero-grid{grid-template-columns:1fr}.hero-main{height:350px}.hero-copy h2{font-size:30px}.hero-copy{padding:36px 12px 36px 32px}
  .hero-side-list{display:grid;grid-template-columns:1fr 1fr;gap:0 24px}.side-item:nth-child(odd){border-right:0}.side-item:nth-last-child(-n+2){border-bottom:0}
  .brief-grid{grid-template-columns:minmax(0,1fr) 280px;gap:20px}.brief-head{flex-wrap:wrap;gap:6px}.brief-head small{display:none}
  .content-layout{grid-template-columns:1fr}.sidebar{display:none}.category-tabs{top:72px;margin-inline:-28px;padding:12px 28px;z-index:30}
  .sources-banner{gap:32px;padding:32px}.sources-intro h2{font-size:28px}.footer-grid{gap:24px}
}
@media(max-width:760px){
  html{scroll-padding-top:84px}.container{padding-inline:22px}.header .container{height:66px;gap:10px}
  .logo{gap:6px}.logo-text strong{font-size:17px}.logo-icon,.logo-icon img{width:29px;height:29px}
  .header-actions{gap:2px}.icon-btn{width:34px;height:34px}.sub-cta{height:34px;padding:0 14px;margin-left:4px}.sub-cta span::after{font-size:11px}
  .frontier{height:calc(100svh - 66px);min-height:590px;max-height:850px;padding:50px 20px 110px}
  .frontier-eyebrow{font-size:9px;letter-spacing:.16em;gap:8px;margin-bottom:27px}.frontier-spark{font-size:23px}
  .frontier h1{font-size:clamp(39px,9.7vw,64px);line-height:1.32;letter-spacing:-.075em}
  .frontier-description{font-size:13px;margin-top:23px;line-height:1.9}.mobile-break{display:block}
  .frontier-actions{gap:8px;margin-top:28px}.frontier-button{height:46px;font-size:12px;padding:0 20px;gap:16px}.frontier-button.secondary{gap:10px}
  .frontier-note{font-size:9px;gap:8px;margin-top:20px}.frontier-bottom{bottom:26px;left:22px;right:22px;font-size:9px}.particle-caption{display:none}
  .frontier-halo{inset:16% 0 20%}.source-ribbon{padding:23px 0}.source-ribbon .container{flex-direction:column;gap:18px}.ribbon-caption{font-size:10px}.journal-wordmarks{width:100%;gap:16px}.journal-nature{font-size:27px}.journal-science{font-size:23px}.journal-cell{font-size:25px}.journal-biorxiv{font-size:21px}.journal-elife{font-size:24px}
  .hero-section{padding-top:54px}.discover-heading{align-items:flex-start;gap:15px;margin-bottom:22px}.discover-heading h2{font-size:27px;max-width:245px;line-height:1.45}.section-eyebrow{font-size:8px;margin-bottom:13px}.discover-heading .text-link{font-size:10px;gap:6px;padding-top:29px}.text-link>span{font-size:16px}
  .feed-status{font-size:9px;gap:10px;flex-wrap:wrap;margin-bottom:18px}.feed-status #currentDate{display:none}.feed-status #lastUpdated{font-size:9px;margin-left:auto;max-width:50%;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.refresh-btn{font-size:10px;padding-left:10px}
  .hero-main{height:auto}.hero-lead{grid-template-columns:minmax(0,1fr)}.hero-copy{padding:0 24px 40px}.hero-copy h2{font-size:23px;line-height:1.45}.hero-kicker{margin-bottom:14px}.hero-art{height:165px}.hero-copy p{font-size:var(--type-body)}.hero-meta{font-size:var(--type-meta);padding-top:16px}.hero-dots{left:24px;bottom:12px}
  .hero-side-list{display:flex;gap:0}.side-item{padding:15px 0}.side-item:nth-last-child(-n+2){border-bottom:1px solid var(--line)}.side-item:last-child{border-bottom:0}.side-item h3{font-size:13px}.side-src{font-size:9px}
  .brief-section{padding-top:24px}.brief-grid{grid-template-columns:minmax(0,1fr);gap:24px}.brief-head{padding:14px 20px}.brief-count{margin-left:auto}.brief-item{padding:14px 20px}.brief-panel{border-radius:20px}.brief-body h3{font-size:var(--type-body)}
  .brief-aside{gap:14px}.sub-card{padding:28px 24px}.sub-card h3{font-size:25px}.sub-card .sub-form{flex-direction:row}.sub-card .sub-input{flex:1;min-width:0}.sub-card .btn-sub{padding:0 20px}.sub-points{gap:6px 16px}.wx-card{padding:18px 24px}
  .orig-section,.category-section{padding-top:56px}.section-title{font-size:27px}.section-count{font-size:10px}.orig-section .section-count{max-width:100%;padding:0}.orig-section .orig-follow{font-size:10px;height:28px;top:5px;padding:0 9px}
  .orig-list{margin:22px -22px 0;padding:0 22px 10px;gap:16px}.orig-card,.orig-card:nth-child(n+7){flex-basis:86%}.orig-body{padding:18px 20px 22px}
  .category-tabs{top:66px;margin-inline:-22px;padding:12px 22px;gap:3px;margin-top:22px}.cat-tab{height:34px;font-size:11px;padding:0 13px}
  .news-grid{gap:14px}.news-card,.news-card.featured{padding:23px 24px 20px}.news-card.featured h3{font-size:21px}.news-card h3{font-size:18px}.news-card p{font-size:var(--type-body)}.news-card.featured .zh-sum{font-size:var(--type-body)}
  .sub-band{padding:24px}.sub-band-copy strong{font-size:16px}.sub-band-copy span{font-size:var(--type-detail)}.sub-band .sub-form{min-width:0}.sub-band .btn-sub{font-size:11px;padding-inline:15px}
  .content-layout{padding-bottom:24px}.sources-section{padding:20px 0 48px}.sources-banner{grid-template-columns:1fr;padding:30px 24px;gap:26px;border-radius:24px}.sources-intro h2{font-size:30px}.sources-intro p{font-size:var(--type-body)}.source-chip{font-size:9px}
  .site-footer{padding-top:40px}.footer-statement{margin-bottom:44px;align-items:flex-start;gap:26px;flex-direction:column}.footer-statement>span{font-size:65px}.footer-statement>div{font-size:15px}.footer-statement .text-link{margin-top:10px;font-size:11px}
  .footer-grid{margin-bottom:24px}.footer-brand p{max-width:100%}.footer-col{gap:4px 20px}.footer-bottom{font-size:9px}.footer-wx{font-size:11px}
}
@media(max-width:374px){.container{padding-inline:16px}.category-tabs,.orig-list{margin-inline:-16px;padding-inline:16px}.header-actions .theme{display:none}.frontier-button{padding-inline:16px}.journal-wordmarks{gap:12px}.journal-nature{font-size:23px}.journal-science{font-size:21px}.journal-biorxiv{font-size:19px}.discover-heading h2{font-size:25px}.sub-card .btn-sub{padding-inline:13px}}
@media(prefers-reduced-motion:reduce){.frontier-spark{animation:none}.frontier-content>*{animation:none}.frontier-button:hover,.news-card:hover{transform:none}}