/* ===== 专题中心 · page-news ===== */
.page-news {
  --news-bar-data: #E23A28;
  --news-bar-lib: #F5C11B;
  --news-bar-fb: #6F7C8C;
  --news-bar-ob: #3FBF7F;
  --news-gap: clamp(38px, 6vw, 66px);
  display: block;
  padding-bottom: clamp(56px, 9vw, 104px);
}

.page-news .breadcrumb {
  margin: 22px 0 6px;
}

/* ---------- 首屏 ---------- */
.page-news .topics-hero {
  position: relative;
  padding: 10px 0 30px;
  border-bottom: 1px solid var(--line);
}
.page-news .topics-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: min(190px, 46%);
  height: 3px;
  background: var(--grad-band);
}
.page-news .topics-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 6vw, 54px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--c-mist);
  margin: 12px 0 18px;
  max-width: 20ch;
}
.page-news .topics-hero__lead {
  max-width: 62ch;
  color: var(--c-mist);
  opacity: 0.86;
  font-size: 16px;
  line-height: 1.8;
}
.page-news .topics-hero__legend {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
}
.page-news .legend-item {
  position: relative;
  padding-left: 16px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--c-slate);
}
.page-news .legend-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  border-radius: 1px;
}
.page-news .legend-item--data::before { background: var(--news-bar-data); }
.page-news .legend-item--lib::before { background: var(--news-bar-lib); }
.page-news .legend-item--fb::before { background: var(--news-bar-fb); }
.page-news .legend-item--ob::before { background: var(--news-bar-ob); }

/* ---------- 栏目筛选条 ---------- */
.page-news .filter-rail {
  position: sticky;
  top: 0;
  z-index: 6;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 16px 0;
  margin-bottom: 4px;
  background: var(--c-ink);
  border-bottom: 1px solid var(--line);
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.page-news .filter-rail::-webkit-scrollbar { display: none; }
.page-news .filter-rail__pill {
  flex: 0 0 auto;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--c-mist);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  text-decoration: none;
  white-space: nowrap;
  transition: background var(--t-fast), color var(--t-fast), border-color var(--t-fast), transform var(--t-fast);
}
.page-news .filter-rail__pill:hover,
.page-news .filter-rail__pill:focus-visible {
  border-color: var(--c-red);
  color: var(--c-yellow);
}
.page-news .filter-rail__pill.is-active {
  background: var(--c-red);
  border-color: var(--c-red);
  color: #FFFFFF;
  box-shadow: 3px 3px 0 rgba(142, 31, 20, 0.7);
}

/* ---------- 栏目区块 ---------- */
.page-news .channel-block {
  padding-top: var(--news-gap);
  scroll-margin-top: 76px;
}
.page-news .channel-block__head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 10px;
}
.page-news .channel-block__num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 13px;
  line-height: 1;
  padding: 4px 9px;
  color: var(--c-yellow);
  border: 1px solid var(--c-yellow);
  letter-spacing: 0.06em;
}
.page-news .channel-block__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 3.6vw, 33px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--c-mist);
  margin: 0;
}
.page-news .channel-block__note {
  margin: 0 0 22px;
  max-width: 60ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-slate);
}

/* ---------- 专题条目 ---------- */
.page-news .topic-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-news .topic-list--continuation {
  margin-top: 4px;
}
.page-news .topic-entry {
  border-bottom: 1px solid var(--line);
}
.page-news .topic-entry__box {
  display: block;
}
.page-news .topic-entry__head {
  position: relative;
  display: grid;
  grid-template-columns: 4px minmax(0, 1fr);
  grid-template-areas:
    "bar meta"
    "bar title";
  column-gap: 16px;
  row-gap: 9px;
  padding: 20px 26px 20px 0;
  cursor: pointer;
  list-style: none;
  transition: background var(--t-fast);
}
.page-news .topic-entry__head::-webkit-details-marker { display: none; }
.page-news .topic-entry__head:hover { background: rgba(34, 38, 46, 0.55); }
.page-news .topic-entry__head::after {
  content: "";
  position: absolute;
  right: 6px;
  top: 24px;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--c-slate);
  border-bottom: 2px solid var(--c-slate);
  transform: rotate(45deg);
  transition: transform var(--t-med), border-color var(--t-fast);
}
.page-news .topic-entry__box[open] > .topic-entry__head::after {
  transform: rotate(225deg);
  border-color: var(--c-yellow);
}
.page-news .topic-entry__bar {
  grid-area: bar;
  align-self: stretch;
  border-radius: 1px;
  background: var(--c-slate);
  transition: transform var(--t-fast);
}
.page-news .topic-entry__box[open] .topic-entry__bar { transform: scaleY(1.02); }
.page-news .topic-entry__bar--data { background: var(--news-bar-data); }
.page-news .topic-entry__bar--lib { background: var(--news-bar-lib); }
.page-news .topic-entry__bar--fb { background: var(--news-bar-fb); }
.page-news .topic-entry__bar--ob { background: var(--news-bar-ob); }

.page-news .topic-entry__meta {
  grid-area: meta;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
}
.page-news .topic-entry__time {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--c-slate);
}
.page-news .fresh-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  margin-right: 7px;
  background: var(--c-slate);
}
.page-news .fresh-dot--fresh {
  background: var(--c-yellow);
  box-shadow: 0 0 0 3px rgba(245, 193, 27, 0.16);
}
.page-news .fresh-dot--recent {
  background: var(--c-green);
  box-shadow: 0 0 0 3px rgba(63, 191, 127, 0.14);
}
.page-news .fresh-dot--older { background: var(--c-slate); }

.page-news .topic-entry__tag {
  display: inline-block;
  padding: 3px 9px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--c-slate);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
}
.page-news .topic-entry__tag--data { color: var(--c-red); border-color: rgba(226, 58, 40, 0.55); }
.page-news .topic-entry__tag--lib { color: var(--c-yellow); border-color: rgba(245, 193, 27, 0.5); }
.page-news .topic-entry__tag--fb { color: var(--c-slate); }
.page-news .topic-entry__tag--ob { color: var(--c-green); border-color: rgba(63, 191, 127, 0.5); }

.page-news .topic-entry__title {
  grid-area: title;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(17px, 2.4vw, 22px);
  line-height: 1.45;
  letter-spacing: -0.005em;
  color: var(--c-mist);
}

.page-news .topic-entry__panel {
  padding: 2px 0 24px 20px;
  margin-left: 2px;
  border-left: 1px solid var(--line);
}
.page-news .topic-entry__panel p {
  margin: 0 0 12px;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(242, 243, 245, 0.78);
}
.page-news .topic-entry__panel--media {
  display: grid;
  gap: 18px;
}
.page-news .topic-entry__link {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--c-yellow);
  text-decoration: none;
  border-bottom: 1px solid rgba(245, 193, 27, 0.5);
  padding-bottom: 2px;
  transition: color var(--t-fast), border-color var(--t-fast);
}
.page-news .topic-entry__link:hover,
.page-news .topic-entry__link:focus-visible {
  color: var(--c-red);
  border-color: var(--c-red);
}

/* ---------- 图片 ---------- */
.page-news .topic-figure {
  margin: 0;
}
.page-news .topic-figure__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  background: var(--c-graphite);
  border: 2px solid var(--line-strong);
  border-radius: var(--radius);
}
.page-news .topic-figure--wide,
.page-news .topic-figure--banner {
  margin: 0 0 22px;
}
.page-news .topic-figure--wide .topic-figure__img { aspect-ratio: 14 / 9; }
.page-news .topic-figure--banner .topic-figure__img { aspect-ratio: 16 / 9; }
.page-news .topic-figure__caption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--c-slate);
}

/* ---------- 页脚引导 ---------- */
.page-news .topics-foot {
  margin-top: var(--news-gap);
  padding-top: 26px;
  border-top: 2px solid transparent;
  border-image: var(--grad-band) 1;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.page-news .topics-foot__text {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(242, 243, 245, 0.8);
}
.page-news .topics-foot__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-news .topics-foot__back {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-slate);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 2px;
  transition: color var(--t-fast), border-color var(--t-fast);
}
.page-news .topics-foot__back:hover,
.page-news .topics-foot__back:focus-visible {
  color: var(--c-yellow);
  border-color: var(--c-yellow);
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-news .topic-entry__panel--media {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
  }
  .page-news .topic-entry__panel--media .topic-figure--thumb .topic-figure__img {
    aspect-ratio: 3 / 2;
  }
  .page-news .topic-entry__head {
    padding: 24px 30px 24px 0;
  }
  .page-news .topics-foot {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
  }
  .page-news .topics-foot__text { flex: 1 1 320px; }
  .page-news .topics-foot__actions { flex: 0 0 auto; }
  .page-news .topics-foot__back { align-self: center; }
}

@media (min-width: 1024px) {
  .page-news .channel-block {
    display: grid;
    grid-template-columns: minmax(0, 210px) minmax(0, 1fr);
    column-gap: clamp(24px, 4vw, 56px);
    align-items: start;
  }
  .page-news .channel-block__head {
    grid-column: 1;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 14px;
  }
  .page-news .channel-block__note {
    grid-column: 1;
    margin-bottom: 0;
    font-size: 13px;
    line-height: 1.85;
  }
  .page-news .channel-block > .topic-list,
  .page-news .channel-block > .topic-figure,
  .page-news .channel-block > .topic-list--continuation {
    grid-column: 2;
  }
  .page-news .channel-block > .topic-list + .topic-figure,
  .page-news .channel-block > .topic-figure + .topic-list {
    margin-top: 4px;
  }
  .page-news .channel-block__title { font-size: clamp(26px, 2.6vw, 34px); }
}

@media (max-width: 420px) {
  .page-news .topic-entry__head {
    padding-right: 22px;
    column-gap: 12px;
  }
  .page-news .topic-entry__panel {
    padding-left: 16px;
  }
  .page-news .topic-entry__title { font-size: 17px; }
}
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