.page-news {
  --news-sticky-top: 28px;
  --news-rule: 1px solid var(--blueprint);
  background: var(--paper);
  color: var(--ink);
  padding-bottom: 72px;
}

.page-news .news-crumbs-row {
  padding-top: 22px;
  padding-bottom: 6px;
}

.page-news .crumbs {
  font-size: 13px;
}

.page-news .news-masthead {
  padding-top: 18px;
  padding-bottom: 34px;
  border-bottom: var(--news-rule);
}

.page-news .news-masthead h1 {
  font-family: var(--font-title);
  font-size: clamp(28px, 6.2vw, 52px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  font-weight: 700;
  margin: 14px 0 18px;
  max-width: 20ch;
}

.page-news .news-masthead .lede {
  max-width: 62ch;
}

.page-news .news-masthead__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 26px;
  margin-top: 24px;
  padding-top: 16px;
  border-top: var(--news-rule);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--sea);
}

/* ── 本期要目 ── */
.page-news .news-highlights {
  padding-top: 48px;
  padding-bottom: 8px;
}

.page-news .sec-head h2 {
  font-family: var(--font-title);
  font-size: clamp(22px, 3.4vw, 34px);
  line-height: 1.24;
  margin: 0 0 10px;
  color: var(--ink);
}

.page-news .sec-head__note {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--sea);
  max-width: 58ch;
}

.page-news .hl-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  border-top: 2px solid var(--ink);
}

.page-news .hl-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: 24px 0;
  border-bottom: var(--news-rule);
}

.page-news .hl-num {
  font-size: 30px;
  line-height: 1;
  font-weight: 600;
  color: var(--orange);
  letter-spacing: 0.02em;
}

.page-news .hl-body h3 {
  font-family: var(--font-title);
  font-size: 20px;
  line-height: 1.34;
  margin: 0 0 8px;
  color: var(--ink);
}

.page-news .hl-body p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink);
  max-width: 66ch;
}

/* ── 主体：索引栏 + 条目流 ── */
.page-news .news-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  padding-top: 44px;
}

.page-news .news-index {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.page-news .nf-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-news .nf-chip {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 14px;
  border: var(--news-rule);
  background: transparent;
  font-size: 13px;
  color: var(--sea);
  cursor: pointer;
  user-select: none;
  transition: border-color 140ms ease, background-color 140ms ease, color 140ms ease;
}

.page-news .nf-chip input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-news .nf-chip:hover {
  border-color: var(--orange);
  color: var(--ink);
}

.page-news .nf-chip:has(input:checked) {
  border-color: var(--orange);
  background: var(--orange-pale);
  color: var(--ink);
  font-weight: 600;
}

.page-news .nf-chip:has(input:focus-visible) {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

.page-news .news-index__label {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--sea);
  margin: 0 0 10px;
}

.page-news .news-series ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-news .news-series a {
  display: block;
  padding: 9px 0;
  border-bottom: 1px dashed var(--blueprint);
  font-size: 14px;
  line-height: 1.5;
  color: var(--sea);
  text-decoration: none;
  transition: color 140ms ease, padding-left 140ms ease;
}

.page-news .news-series a:hover,
.page-news .news-series a:focus-visible {
  color: var(--orange);
  padding-left: 6px;
}

.page-news .news-top {
  align-self: flex-start;
  font-size: 12px;
  letter-spacing: 0.06em;
  padding: 9px 13px;
  border: var(--news-rule);
  color: var(--sea);
  text-decoration: none;
  transition: border-color 140ms ease, color 140ms ease;
}

.page-news .news-top:hover,
.page-news .news-top:focus-visible {
  border-color: var(--orange);
  color: var(--orange);
}

/* ── 栏目区块 ── */
.page-news .nsec {
  padding-bottom: 8px;
  scroll-margin-top: 24px;
}

.page-news .nsec + .nsec {
  padding-top: 46px;
}

.page-news .nsec-head {
  border-top: 4px solid var(--ink);
  padding-top: 16px;
  margin-bottom: 22px;
}

.page-news .nsec[data-cat="version"] .nsec-head { border-top-color: var(--sea); }
.page-news .nsec[data-cat="archive"] .nsec-head { border-top-color: var(--teal-deep); }
.page-news .nsec[data-cat="node"] .nsec-head { border-top-color: var(--orange); }
.page-news .nsec[data-cat="issue"] .nsec-head { border-top-color: var(--celadon); }
.page-news .nsec[data-cat="series"] .nsec-head { border-top-color: var(--index-gray); }

.page-news .nsec-tag {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.14em;
  padding: 4px 10px;
  border: 1px solid var(--blueprint);
  color: var(--sea);
  margin-bottom: 12px;
}

.page-news .nsec[data-cat="version"] .nsec-tag { border-color: var(--sea); color: var(--sea); }
.page-news .nsec[data-cat="archive"] .nsec-tag { border-color: var(--teal-deep); color: var(--teal-deep); }
.page-news .nsec[data-cat="node"] .nsec-tag { border-color: var(--orange); color: var(--orange); }
.page-news .nsec[data-cat="issue"] .nsec-tag { border-color: var(--celadon); color: var(--teal-deep); }
.page-news .nsec[data-cat="series"] .nsec-tag { border-color: var(--index-gray); color: var(--sea); }

.page-news .nsec-head h2 {
  font-family: var(--font-title);
  font-size: clamp(21px, 3.2vw, 30px);
  line-height: 1.26;
  margin: 0 0 10px;
  color: var(--ink);
}

.page-news .nsec-note {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--sea);
  max-width: 60ch;
}

/* ── 图片 ── */
.page-news .news-media {
  margin: 0 0 26px;
  border: var(--news-rule);
  background: var(--ink);
}

.page-news .news-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-news .news-media .media__caption {
  padding: 11px 14px;
  background: var(--paper);
  border-top: var(--news-rule);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--sea);
}

/* ── 条目 ── */
.page-news .nf-list {
  border-bottom: var(--news-rule);
}

.page-news .nitem {
  position: relative;
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 12px;
  padding: 20px 10px 20px 0;
  border-top: var(--news-rule);
  transition: background-color 160ms ease, border-top-color 160ms ease;
}

.page-news .nitem:hover,
.page-news .nitem:focus-within {
  border-top-color: var(--orange);
  background: rgba(199, 213, 222, 0.16);
}

.page-news .nitem-num {
  font-size: 12.5px;
  line-height: 1.6;
  letter-spacing: 0.06em;
  color: var(--sea);
}

.page-news .nitem-meta {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--sea);
}

.page-news .nitem h3 {
  font-family: var(--font-title);
  font-size: 19px;
  line-height: 1.36;
  font-weight: 700;
  margin: 6px 0 8px;
  color: var(--ink);
}

.page-news .nitem-sum {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
  max-width: 66ch;
}

.page-news .nitem-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0 0;
}

.page-news .nitem-tags .tag {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  padding: 4px 9px;
  border: 1px solid var(--celadon);
  color: var(--teal-deep);
}

/* ── 筛选（渐进增强，无 :has 支持时全部条目照常显示） ── */
.page-news:has(#nf-version:checked) .nsec:not([data-cat="version"]),
.page-news:has(#nf-archive:checked) .nsec:not([data-cat="archive"]),
.page-news:has(#nf-node:checked) .nsec:not([data-cat="node"]),
.page-news:has(#nf-issue:checked) .nsec:not([data-cat="issue"]),
.page-news:has(#nf-series:checked) .nsec:not([data-cat="series"]) {
  display: none;
}

/* ── 尾部引导 ── */
.page-news .news-tail {
  padding-top: 56px;
}

.page-news .news-tail__box {
  border: var(--news-rule);
  border-top: 4px solid var(--orange);
  background: var(--paper);
  padding: 28px 22px;
  box-shadow: var(--shadow-paper);
}

.page-news .news-tail__box h2 {
  font-family: var(--font-title);
  font-size: clamp(20px, 3vw, 28px);
  line-height: 1.3;
  margin: 10px 0 12px;
  color: var(--ink);
}

.page-news .news-tail__box .body-text {
  margin: 0;
  max-width: 62ch;
}

.page-news .news-tail__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 22px 0 0;
}

/* ── 滚动显现（JS 添加 .reveal-init 后生效） ── */
.page-news .reveal-init {
  opacity: 0;
  transform: translateY(14px);
}

.page-news .reveal-init.is-in {
  opacity: 1;
  transform: none;
  transition: opacity 420ms ease, transform 420ms ease;
}

/* ── 桌面布局 ── */
@media (min-width: 900px) {
  .page-news .news-masthead {
    display: grid;
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    column-gap: 48px;
    align-items: end;
  }

  .page-news .news-masthead .kicker,
  .page-news .news-masthead h1,
  .page-news .news-masthead .lede {
    grid-column: 1;
  }

  .page-news .news-masthead__meta {
    grid-column: 2;
    grid-row: 1 / span 3;
    flex-direction: column;
    align-self: end;
    border-top: none;
    border-left: var(--news-rule);
    padding-top: 0;
    padding-left: 24px;
    margin-top: 0;
  }

  .page-news .hl-item {
    grid-template-columns: 90px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
  }

  .page-news .hl-num {
    font-size: 38px;
  }

  .page-news .news-body {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: 56px;
    padding-top: 56px;
  }

  .page-news .news-index {
    position: sticky;
    top: var(--news-sticky-top);
    align-self: start;
  }

  .page-news .nf-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .page-news .nf-chip {
    justify-content: flex-start;
    min-height: 38px;
    padding: 0 12px;
  }

  .page-news .nitem {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 20px;
    padding: 22px 14px 22px 0;
  }

  .page-news .nitem::before {
    content: "";
    position: absolute;
    left: -18px;
    top: 22px;
    bottom: 22px;
    width: 2px;
    background: transparent;
    transition: background-color 160ms ease;
  }

  .page-news .nitem:hover::before,
  .page-news .nitem:focus-within::before {
    background: var(--orange);
  }

  .page-news .nitem-sum {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .page-news .nitem:hover .nitem-sum,
  .page-news .nitem:focus-within .nitem-sum {
    display: block;
    -webkit-line-clamp: unset;
    overflow: visible;
  }

  .page-news .news-tail__box {
    padding: 40px 44px;
  }
}

@media (min-width: 1240px) {
  .page-news .news-body {
    grid-template-columns: 232px minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-news .nitem,
  .page-news .nf-chip,
  .page-news .news-series a,
  .page-news .news-top,
  .page-news .nitem::before,
  .page-news .reveal-init.is-in {
    transition: none;
  }

  .page-news .reveal-init {
    opacity: 1;
    transform: none;
  }
}