/* 谛听 Diting Lab 对外网站
   自适应：手机（<640px）单栏、紧凑；平板单栏；电脑（≥1024px）加宽到 1200px、板块三栏、列表页带左侧固定栏。 */
:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --ink: #1d2433;
  --muted: #667085;
  --line: #e6e2d9;
  --accent: #24496b;
  --accent-soft: #e7eef5;
  --legal: #9a4a24;
  --legal-soft: #f7ece5;
  --paper: #2b6a59;
  --paper-soft: #e5f1ed;
  --note: #24496b;
  --radius: 12px;
  --gutter: 20px;
  --header-h: 60px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Hiragino Kaku Gothic ProN",
          "PingFang SC", "Noto Sans CJK SC", "Noto Sans JP", "Microsoft YaHei", sans-serif;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12161d;
    --surface: #1a2029;
    --ink: #e7e9ee;
    --muted: #98a2b3;
    --line: #2c3440;
    --accent: #8db8e0;
    --accent-soft: #1f2d3c;
    --legal: #e3a07c;
    --legal-soft: #3a261c;
    --paper: #7cc4ad;
    --paper-soft: #1b3029;
    --note: #a9c8e6;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: calc(var(--header-h) + 12px); }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--font); line-height: 1.65; font-size: 16px; }
:lang(ja) { font-family: -apple-system, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic", sans-serif; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 1200px; margin: 0 auto; padding: 0 var(--gutter); }
.muted { color: var(--muted); }
.hidden { display: none !important; }

/* 页眉：电脑一行（标志 · 导航 · 语言），手机两行（标志 + 语言 / 导航横向滑动） */
.site-header { background: var(--surface); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 10; }
.header-grid { display: grid; grid-template-columns: auto 1fr auto; grid-template-areas: "brand nav lang";
               align-items: center; column-gap: 32px; min-height: var(--header-h); }
.brand { grid-area: brand; display: flex; align-items: center; gap: 8px; color: var(--ink); font-weight: 700; }
.brand:hover { text-decoration: none; }
.brand-cn { font-size: 1.2rem; letter-spacing: .08em; }
.brand-en { color: var(--muted); font-weight: 600; font-size: .95rem; }
.main-nav { grid-area: nav; display: flex; gap: 24px; align-self: stretch; }
.main-nav a { display: flex; align-items: center; color: var(--muted); font-weight: 600; border-bottom: 2px solid transparent; }
.main-nav a[aria-current] { color: var(--ink); border-bottom-color: var(--accent); }
.main-nav a:hover { text-decoration: none; color: var(--ink); }
.lang-switch { grid-area: lang; display: flex; gap: 4px; }
.lang-switch a { padding: 3px 10px; border-radius: 999px; font-size: .85rem; color: var(--muted); border: 1px solid transparent; white-space: nowrap; }
.lang-switch a[aria-current] { color: var(--accent); border-color: var(--accent); background: var(--accent-soft); }
.lang-switch a:hover { text-decoration: none; color: var(--accent); }

main { padding-top: 24px; padding-bottom: 48px; }
.hero { max-width: 820px; }
.hero h1 { font-size: 1.75rem; line-height: 1.3; margin: 8px 0 10px; }
.hero p { margin: 0 0 8px; color: var(--muted); }
.hero .eyebrow { color: var(--accent); font-weight: 600; font-size: .85rem; margin: 4px 0 0; }
.hero-stats { display: flex; flex-wrap: wrap; gap: 4px 22px; margin: 6px 0 0; }
.hero-stats .stat { display: flex; flex-direction: row-reverse; align-items: baseline; gap: 6px; }
.hero-stats dt { color: var(--muted); font-size: .9rem; }
.hero-stats dd { margin: 0; color: var(--accent); font-weight: 700; }
.page-title { font-size: 1.6rem; line-height: 1.3; margin: 6px 0 6px; }
.lede { color: var(--muted); margin: 0 0 4px; max-width: 820px; }
.page-head { margin-bottom: 12px; }

.block { margin-top: 36px; }
.block-head { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; }
.block-head h2, .block-head h3 { margin: 0 0 10px; }
.block > .block-head h2 { font-size: 1.3rem; }
.more { font-size: .9rem; font-weight: 600; white-space: nowrap; }
.count { color: var(--muted); font-size: .8rem; font-weight: 500; }

/* 板块卡片：电脑三栏、平板两栏、手机一栏 */
.section-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 340px), 1fr)); gap: 16px; }
.section-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 18px 12px;
                display: flex; flex-direction: column; min-width: 0; }
.section-card h2, .section-card h3 { font-size: 1.05rem; }
.section-card .compact-list { flex: 1; }
.section-card > .more { margin-top: 6px; }

.compact-list { list-style: none; margin: 0; padding: 0; }
.compact { padding: 9px 0; border-top: 1px solid var(--line); }
.compact:first-child { border-top: 0; }
.compact .orig { font-weight: 600; line-height: 1.45; overflow-wrap: anywhere; }
.compact .orig a { color: var(--ink); }
.compact .orig a:hover { color: var(--accent); }
.compact .note { color: var(--note); font-size: .92rem; margin-top: 2px; }

.meta { display: flex; flex-wrap: wrap; gap: 4px 10px; font-size: .8rem; color: var(--muted); align-items: center; }
.tag { border-radius: 6px; padding: 1px 7px; font-weight: 600; font-size: .75rem; }
.tag-legal { background: var(--legal-soft); color: var(--legal); }
.tag-paper, .tag-signal { background: var(--paper-soft); color: var(--paper); }
.cats { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .75rem; }

/* 列表页：手机上按钮在前、内容居中、日期目录在最后；电脑上两者合成左侧固定栏 */
.layout { display: flex; flex-direction: column; }
.side { display: contents; }
.chips { order: 0; }
.content { order: 1; min-width: 0; }
.archive { order: 2; }

.chips { position: relative; display: flex; gap: 6px; flex-wrap: nowrap; overflow-x: auto; scrollbar-width: none;
         margin: 0 calc(-1 * var(--gutter)) 12px; padding: 2px var(--gutter); }
.chips::-webkit-scrollbar { display: none; }
.chips a { flex: none; white-space: nowrap; border: 1px solid var(--line); background: var(--surface); border-radius: 999px;
           padding: 5px 12px; font-size: .88rem; color: var(--ink); }
.chips a[aria-current] { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.chips a:hover { text-decoration: none; border-color: var(--accent); }

.filter { width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface);
          color: var(--ink); font: inherit; margin-bottom: 4px; }
.day-head { font-size: .95rem; color: var(--muted); margin: 22px 0 8px; padding-bottom: 4px; border-bottom: 1px solid var(--line); }
.item { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 18px; margin: 10px 0; }
.item .orig { font-size: 1.05rem; line-height: 1.45; margin: 6px 0 6px; overflow-wrap: anywhere; }
.item .orig a { color: var(--ink); }
.item .orig a:hover { color: var(--accent); }
.item p { margin: 6px 0 0; overflow-wrap: anywhere; }
.label { display: inline-block; font-size: .72rem; font-weight: 700; color: var(--accent); background: var(--accent-soft);
         border-radius: 5px; padding: 0 6px; margin-right: 7px; vertical-align: 1px; }
.note { color: var(--note); font-weight: 500; }
.summary { color: var(--ink); }
.pending { color: var(--muted); font-size: .88rem; font-style: italic; }
.authors { color: var(--muted); font-size: .85rem; }

.pager { display: flex; gap: 8px; flex-wrap: wrap; margin: 18px 0; }
.pager a { border: 1px solid var(--line); border-radius: 8px; padding: 4px 10px; }
.pager a[aria-current] { background: var(--accent-soft); border-color: var(--accent); }
.archive { margin-top: 30px; }
.archive h2 { font-size: 1.05rem; margin: 0 0 8px; }
.archive ul { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 4px 16px; }

.prose { max-width: 760px; }
.prose h2 { font-size: 1.15rem; margin-top: 26px; }
.inline { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding-left: 0; }
.inline li { border: 1px solid var(--line); border-radius: 999px; padding: 2px 12px; font-size: .92rem; }

.site-footer { border-top: 1px solid var(--line); background: var(--surface); font-size: .85rem; color: var(--muted); padding: 16px 0 28px; }
.site-footer p { margin: 6px 0; max-width: 900px; }
.risk-notice { max-width: 980px; margin-bottom: 14px; }
.risk-notice h2 { font-size: .95rem; color: var(--ink); margin: 6px 0 8px; }
.risk-notice ol { margin: 0; padding-left: 1.4em; }
.risk-notice li { margin: 4px 0; font-size: .8rem; line-height: 1.65; }

.chooser { text-align: center; padding-top: 18vh; }
.chooser h1 { display: flex; align-items: center; justify-content: center; gap: 10px; }
.chooser ul { list-style: none; padding: 0; display: flex; gap: 12px; justify-content: center; }
.chooser a { border: 1px solid var(--line); border-radius: 999px; padding: 6px 16px; }

/* 论文粗评（D-29）：只标出 4–5 星的「值得关注」 */
:root { --star: #b7791f; --pick-soft: #fbf3e2; }
@media (prefers-color-scheme: dark) { :root { --star: #f2c14e; --pick-soft: #2d2616; } }
.stars { color: var(--star); letter-spacing: .04em; font-size: .9rem; white-space: nowrap; }
.stars-sm { color: var(--star); font-weight: 700; font-size: .78rem; }
.pick-badge { display: inline-flex; align-items: center; gap: 6px; font-size: .78rem; font-weight: 700; color: var(--star);
              background: var(--pick-soft); border-radius: 999px; padding: 1px 10px 1px 8px; margin-bottom: 4px; }
.item.notable { border-color: color-mix(in srgb, var(--star) 45%, var(--line)); }
.tag-code { background: var(--accent-soft); color: var(--accent); }
.why { color: var(--ink); }
.label-why { color: var(--star); background: var(--pick-soft); }
.picks { background: var(--surface); border: 1px solid color-mix(in srgb, var(--star) 45%, var(--line));
         border-radius: var(--radius); padding: 14px 18px 8px; margin-bottom: 16px; }
.picks .block-head h2 { font-size: 1.15rem; }
.pick-list { list-style: none; margin: 0; padding: 0; }
.pick { padding: 10px 0; border-top: 1px solid var(--line); }
.pick:first-child { border-top: 0; }
.pick .orig { font-weight: 600; line-height: 1.45; overflow-wrap: anywhere; }
.pick .orig a { color: var(--ink); }
.pick .orig a:hover { color: var(--accent); }
.pick .note { color: var(--note); font-size: .92rem; margin-top: 2px; }
.pick .why { font-size: .9rem; margin-top: 4px; }
.stars-note { color: var(--muted); font-size: .8rem; margin: 6px 0 4px; }
.filter-row { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 14px; margin-bottom: 4px; }
.filter-row .filter { flex: 1 1 260px; margin-bottom: 0; }
.only-notable { font-size: .88rem; color: var(--muted); white-space: nowrap; cursor: pointer; }
.only-notable input { accent-color: var(--star); vertical-align: -2px; }

/* 电脑：列表页左侧固定栏（板块/辖区 + 日期目录），右侧内容 */
@media (min-width: 1024px) {
  .layout { display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 36px; align-items: start; }
  .side { display: block; position: sticky; top: calc(var(--header-h) + 16px);
          max-height: calc(100vh - var(--header-h) - 32px); overflow-y: auto; scrollbar-width: thin; }
  .chips { flex-direction: column; gap: 2px; overflow: visible; margin: 0; padding: 0; }
  .chips a { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; white-space: normal;
             border: 0; border-radius: 8px; background: transparent; padding: 6px 10px; font-size: .92rem; }
  .chips a:hover { background: var(--accent-soft); }
  .chips a[aria-current] { background: var(--accent-soft); }
  .archive { margin-top: 18px; padding-top: 14px; border-top: 1px solid var(--line); }
  .archive h2 { font-size: .85rem; color: var(--muted); padding: 0 10px; }
  .archive ul { grid-template-columns: 1fr; gap: 0; }
  .archive li { display: flex; justify-content: space-between; gap: 8px; padding: 3px 10px; font-size: .88rem; }
  .content > .filter { margin-top: 0; }
  .content > .day:first-of-type .day-head { margin-top: 14px; }
}

/* 平板及以下：页眉两行 */
@media (max-width: 859px) {
  :root { --header-h: 92px; }
  .header-grid { grid-template-columns: 1fr auto; grid-template-areas: "brand lang" "nav nav"; padding-top: 10px; }
  .main-nav { gap: 20px; overflow-x: auto; white-space: nowrap; scrollbar-width: none; padding-top: 4px; }
  .main-nav::-webkit-scrollbar { display: none; }
  .main-nav a { padding: 6px 0 8px; }
}

/* 手机 */
@media (max-width: 640px) {
  :root { --gutter: 16px; }
  body { font-size: 15px; }
  main { padding-top: 16px; }
  .hero h1 { font-size: 1.35rem; }
  .page-title { font-size: 1.35rem; }
  .block { margin-top: 28px; }
  .brand-en { display: none; }
  .lang-switch a { padding: 3px 8px; }
  .section-grid { gap: 12px; }
  .section-card { padding: 12px 14px 10px; }
  .item { padding: 12px 14px; }
  .item .orig { font-size: 1rem; }
  .archive ul { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
}