:root {
  color-scheme: light;
  --paper: #ffffff;
  --white: #fff;
  --ink: #17284b;
  --muted: #4b5c75;
  --line: #ccd7e6;
  --link: #214fb0;
  font: 16px/1.6 "Avenir Next", "PingFang SC", system-ui, sans-serif;
  background: var(--paper);
  color: var(--ink);
}
* { box-sizing: border-box; }
body { margin: 0; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--link); text-decoration: underline; }
a:focus-visible { outline: 3px solid var(--link); outline-offset: 4px; }
h1, h2, h3, p { margin: 0; overflow-wrap: anywhere; }
h1, h2, h3, .wordmark { line-height: 1.18; font-weight: 750; }
.masthead, main, footer { width: min(1180px, calc(100% - 48px)); margin-inline: auto; }
.masthead, .masthead nav, .topic-nav { display: flex; align-items: center; flex-wrap: wrap; gap: 12px 22px; }
.masthead { justify-content: space-between; border-bottom: 1px solid var(--line); padding-block: 22px; }
.wordmark { font-size: 1.5rem; letter-spacing: -.055em; }
.masthead nav, .topic-nav, footer { font-size: .875rem; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.masthead-news { display: block; padding-block: 18px 0; border-bottom: 0; }
.masthead-top { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 14px 24px; padding-bottom: 16px; }
.masthead-news .global-nav { gap: 10px 22px; }
.global-nav [aria-current] { color: var(--link); font-weight: 700; }
.language-switch { border-left: 1px solid var(--line); padding-left: 18px; }
.masthead-news .topic-nav { width: 100%; gap: 4px; }
.masthead-news .topic-nav a { font-size: .8rem; padding: 8px 10px; }
.masthead-news .topic-nav [aria-current] { color: var(--accent, var(--link)); }
.hero { padding-block: 30px 24px; }
h1 { font-size: clamp(1.9rem, 4vw, 3.1rem); letter-spacing: -.045em; }
.lead, .byline, .eyebrow, small { color: var(--muted); }
.lead { max-width: 65ch; margin-top: 12px; }
.topic-nav { border-block: 1px solid var(--line); padding-block: 9px; gap: 6px; }
.topic-nav a { padding: 7px 12px; border-radius: 6px; }
.topic-nav a:hover { background: #f0f4fa; text-decoration: none; }
.topic-nav [aria-current] { color: var(--link); background: #edf3ff; font-weight: 750; }
.analysis { margin-block: 38px; }
.analysis > h2 { font-size: clamp(1.45rem, 3vw, 2.15rem); margin-bottom: 12px; }
.signal-list { margin-block: 12px; }
.signal-card { border-top: 1px solid var(--line); padding: 14px 0; min-width: 0; }
.signal-card h2, .signal-card h3 { font-size: 1.2rem; }
.signal-card p { font-size: .9rem; margin-block: 4px; max-width: 72ch; }
.signal-card .eyebrow { font-size: .76rem; }
.signal-intro { color: var(--muted); line-height: 1.65; }
.news-overview .signal-intro, .news-category .signal-intro { display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.news-lead .signal-list { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); grid-template-rows: repeat(2, minmax(0, 1fr)); align-items: stretch; gap: 0 28px; }
.news-lead > h2 { font-size: 1.5rem; }
.news-lead .signal-card:first-child { grid-row: 1 / 3; background: var(--ink); color: var(--white); border: 0; border-radius: 12px; padding: clamp(24px, 3vw, 34px); min-height: 300px; display: flex; flex-direction: column; justify-content: center; }
.news-lead .signal-card:first-child h3 { font-size: clamp(1.45rem, 2.2vw, 1.95rem); line-height: 1.25; margin-block: 10px; letter-spacing: -.025em; }
.news-lead .signal-card:not(:first-child) { grid-column: 2; padding-block: 18px; display: flex; flex-direction: column; justify-content: center; }
.news-lead .signal-card:not(:first-child) h3 { font-size: 1.05rem; }
.news-lead .signal-card:not(:first-child) .signal-intro { -webkit-line-clamp: 2; }
.news-lead .signal-card:first-child .signal-intro, .news-lead .signal-card:first-child .signal-metric { color: #e0e9fa; }
.news-lead .signal-metric { font-size: .78rem; color: var(--muted); margin-top: 8px; }
.news-lead .signal-card:first-child .eyebrow, .news-lead .signal-card:first-child a:hover { color: #d7e5ff; }
.daily-rankings { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); margin-top: 18px; border-block: 1px solid var(--line); }
.daily-rankings section { padding: 16px 12px; min-width: 0; }
.daily-rankings h3 { min-height: 44px; font-size: 1rem; }
.daily-rankings section { display: flex; flex-direction: column; }
.daily-rankings section > a { margin-top: auto; font-size: .8rem; font-weight: 650; padding-top: 14px; }
.daily-rankings ol { list-style: none; counter-reset: rank; padding: 0; margin: 12px 0; }
.daily-rankings li { counter-increment: rank; display: grid; grid-template-columns: 20px minmax(0, 1fr); gap: 4px 7px; padding-block: 10px; margin: 0; border-top: 1px solid #e8edf4; font-size: .85rem; line-height: 1.45; }
.daily-rankings li::before { content: counter(rank, decimal-leading-zero); color: #6b7c94; font-variant-numeric: tabular-nums; font-size: .75rem; padding-top: 2px; }
.daily-rankings li small { grid-column: 2; font-size: .72rem; }
.daily-rankings section + section { border-left: 1px solid var(--line); }
.daily-rankings ol { padding-left: 22px; }
.daily-rankings li, .story-layout li { margin-block: 8px; overflow-wrap: anywhere; }
.daily-rankings p { font-size: .82rem; color: var(--muted); }
.daily-rankings section > a, .analysis > a, [rel="prev"], [rel="next"] { color: var(--link); }
.news-category .signal-list { max-width: 820px; }
.news-category .topic-nav { margin-bottom: 22px; }
.story-layout { display: grid; grid-template-columns: minmax(0, 760px) minmax(180px, 1fr); gap: clamp(24px, 6vw, 80px); padding-block: clamp(34px, 7vw, 88px); }
.story-layout h1 { margin-block: 16px 24px; }
.story-layout .standfirst { font-size: clamp(1.05rem, 2vw, 1.35rem); max-width: 60ch; }
.story-layout aside { border-top: 2px solid var(--ink); padding-top: 16px; }
.story-layout aside h2 { font-size: 1.1rem; }
.story-layout aside ul { list-style: none; padding: 0; }
.story-layout aside li { padding-block: 12px; border-bottom: 1px solid var(--line); font-size: .95rem; }
.story-layout article { min-width: 0; }
.story-layout h1 { font-size: clamp(2rem, 3.8vw, 3.35rem); }
.story-layout .byline { font-size: .82rem; }
.category-sections { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px 32px; }
.category-sections .analysis { margin-block: 16px; }
.category-sections .analysis > h2 { font-size: 1.4rem; border-bottom: 3px solid var(--ink); padding-bottom: 14px; }
.category-sections .signal-card h3 { font-size: 1.05rem; }
.category-sections .signal-card .signal-intro { -webkit-line-clamp: 3; }
.category-sections .analysis > a { font-size: .85rem; font-weight: 650; }
.news-category [aria-label="Pages"], .news-category [aria-label="分页"] { display: flex; gap: 18px; margin-block: 30px; }
.news-category [rel="prev"], .news-category [rel="next"] { border: 1px solid var(--line); padding: 8px 16px; border-radius: 6px; }
.story-layout ul { padding-left: 18px; }
.story-section { margin-top: 38px; border-top: 1px solid var(--line); padding-top: 22px; }
.story-section h2 { margin-bottom: 16px; }
.story-meta { margin: 0; }
.story-meta > div { display: grid; grid-template-columns: 145px minmax(0, 1fr); gap: 12px; padding: 8px 0; border-bottom: 1px solid var(--line); }
.story-meta dt { color: var(--muted); }
.story-meta dd { margin: 0; overflow-wrap: anywhere; }
.analysis-block { margin-top: 22px; }
.analysis-block h3 { font-size: 1.1rem; margin-bottom: 8px; }
.source-button { display: inline-block; margin-top: 25px; padding: 10px 16px; background: var(--link); color: var(--white); border-radius: 6px; }
.source-button:hover { color: var(--white); }
.detail-media { margin: 30px 0 0; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; background: #f1f5fa; }
.detail-media > a { display: block; }
.detail-media img { display: block; width: 100%; height: auto; aspect-ratio: 8 / 5; object-fit: contain; object-position: top center; }
.detail-media figcaption { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 6px 16px; padding: 11px 16px; border-top: 1px solid var(--line); background: var(--white); color: var(--muted); font-size: .75rem; line-height: 1.5; overflow-wrap: anywhere; }
.detail-media figcaption time { font-variant-numeric: tabular-nums; }
footer { border-top: 1px solid var(--line); padding-block: 24px; margin-top: 32px; }
.site-footer { display: flex; flex-wrap: wrap; gap: 12px 24px; font-size: .8rem; color: var(--muted); }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: 6px 10px; font-size: .8rem; color: var(--muted); margin-bottom: 24px; }
.category-header { border-bottom: 3px solid var(--accent); }
.category-header h1 { margin-top: 10px; font-size: clamp(1.65rem,3vw,2.35rem); }
.category-header .lead { max-width: 80ch; }
.category-focus { margin: 22px 0 26px; max-width: 880px; }
.category-focus h2 { font-size: .9rem; margin-bottom: 6px; }
.category-focus p, .legacy-notice { font-size: .85rem; color: var(--muted); }
.legacy-notice { padding-block: 18px; }
.legacy-notice a { color: var(--link); }
.story-count { color: var(--muted); font-size: .8rem; margin-top: 24px; }
.news-category .category-feed { max-width: none; columns: 3; column-gap: 32px; }
.category-feed .signal-card { display: inline-block; width: 100%; break-inside: avoid; vertical-align: top; }
.category-feed .signal-card h2 { font-size: 1.08rem; line-height: 1.45; }
.about-content { max-width: 780px; margin-inline: auto; padding-block: 44px 30px; }
.about-content h1 { font-size: clamp(1.8rem,3vw,2.4rem); margin-bottom: 18px; }
.about-content > p { color: var(--muted); font-size: 1.05rem; }
.about-content section { border-top: 1px solid var(--line); margin-top: 30px; padding-top: 24px; }
.about-content h2 { font-size: 1.2rem; margin-bottom: 12px; }
.about-content ul { padding-left: 22px; }
.about-content li { margin-block: 10px; }
.about-content a { color: var(--link); }
.research-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px 48px; margin-top: 24px; }
.research-topic { border-top: 3px solid var(--ink); padding-top: 18px; min-width: 0; }
.research-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 14px; margin-bottom: 12px; }
.research-heading h3 { font-size: 1.3rem; }
.research-heading a { flex-shrink: 0; color: var(--link); font-size: .82rem; }
.research-topic > .byline { font-size: .85rem; }
.research-entry { padding-block: 20px; border-bottom: 1px solid var(--line); }
.research-entry h4 { font-size: 1.1rem; line-height: 1.4; margin: 8px 0; overflow-wrap: anywhere; }
.research-entry p, .research-entry dl { font-size: .9rem; overflow-wrap: anywhere; }
.research-entry .byline { font-size: .75rem; }
.research-entry dt { font-weight: 700; margin-top: 12px; color: var(--ink); }
.research-entry dd { margin: 3px 0 0; color: var(--muted); }
.content-panel { --accent: #315eb5; }
.content-panel[data-board="github"] { --accent: #315eb5; }
.content-panel[data-board="product-hunt"] { --accent: #a74c31; }
.content-panel[data-board="hf-models"] { --accent: #826410; }
.content-panel[data-board="hf-papers"] { --accent: #6550a5; }
.content-panel[data-board="openrouter"] { --accent: #187361; }
.content-panel[data-board="capability"] { --accent: #805668; }
.daily-rankings { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px 32px; border: 0; }
.daily-rankings .content-panel { padding: 0 0 16px; border: 0; border-top: 3px solid var(--accent); }
.daily-rankings .content-panel > h3 { margin: 0; padding: 16px 0 10px; min-height: 0; font-size: 1.15rem; }
.daily-rankings .content-panel > p { min-height: 26px; }
.daily-rankings li { font-size: .95rem; padding-block: 13px; }
.daily-rankings li > a { font-weight: 650; }
.daily-rankings li small { color: var(--muted); font-size: .78rem; }
.category-sections { gap: 24px 32px; }
.category-sections .content-panel { display: flex; flex-direction: column; min-width: 0; border-top: 3px solid var(--accent); padding-top: 16px; }
.category-sections .content-panel > h2 { border: 0; font-size: 1.15rem; padding: 0 0 10px; min-height: 2.8em; }
.category-intro { min-height: 64px; font-size: .82rem; color: var(--muted); line-height: 1.6; }
.category-sections .category-more { margin-top: auto; padding-top: 8px; }
.empty-state { font-size: .85rem; color: var(--muted); padding-block: 18px; }
.category-sections .signal-card h3 { font-size: .95rem; line-height: 1.45; }
.category-sections .signal-card { padding-block: 13px; }
.content-panel > a { color: var(--accent); font-size: .85rem; font-weight: 650; }
.daily-rankings .content-panel > a { font-size: .85rem; padding-block: 12px 0; }
.daily-rankings .content-panel .ranking-intro { min-height: 64px; margin-bottom: 10px; color: var(--ink); line-height: 1.6; }
.daily-rankings .content-panel .ranking-metric { font-size: .75rem; color: var(--muted); }
.daily-rankings .content-panel .ranking-attribution { font-size: .7rem; padding-top: 10px; }
.ranking-list { max-width: 860px; padding-left: 32px; }
.ranking-list > li { padding: 18px 12px; }
.ranking-list > li::marker { color: var(--muted); font-variant-numeric: tabular-nums; }
.ranking-list .signal-card p:not(.byline) { display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.ranking-detail [aria-label="Breadcrumb"], .ranking-detail [aria-label="面包屑"] { font-size: .85rem; color: var(--muted); }
@media (max-width: 900px) {
  .story-layout { grid-template-columns: minmax(0, 1fr); }
  .daily-rankings, .category-sections { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .news-category .category-feed { columns: 2; }
  .daily-rankings section + section { border-left: 0; }
}
@media (max-width: 620px) {
  .daily-rankings { grid-template-columns: minmax(0, 1fr); }
  .research-grid { grid-template-columns: minmax(0, 1fr); }
  .category-sections { grid-template-columns: minmax(0, 1fr); gap: 12px; }
  .topic-nav { flex-wrap: nowrap; overflow-x: auto; }
  .topic-nav a { flex-shrink: 0; }
  .masthead nav { gap: 14px; font-size: .78rem; }
  .masthead { padding-block: 16px; }
  .masthead-news { padding-bottom: 0; }
  .masthead-news .global-nav { gap: 10px 16px; }
  .masthead-top { align-items: flex-start; gap: 14px; }
  .masthead-news .topic-nav { padding-block: 7px; }
  .news-category .category-feed { columns: 1; }
  .category-intro, .category-sections .content-panel > h2 { min-height: 0; }
  .about-content { padding-top: 30px; }
  .story-meta > div { grid-template-columns: 100px minmax(0, 1fr); font-size: .85rem; }
  .masthead, main, footer { width: calc(100% - 32px); }
  .hero { padding-top: 26px; }
  .news-lead .signal-list, .story-layout, .daily-rankings { grid-template-columns: minmax(0, 1fr); }
  .news-lead .signal-list { grid-template-rows: auto; gap: 0; }
  .news-lead .signal-card:first-child { grid-row: auto; min-height: 0; margin-bottom: 12px; padding: 26px; }
  .news-lead .signal-card:not(:first-child) { grid-column: auto; }
  .daily-rankings section + section { border-top: 1px solid var(--line); }
}