.page-news {
  --news-update: var(--turquoise);
  --news-version: var(--gold);
  --news-series: var(--crimson);
  --news-rule: var(--crimson-soft);
  --news-tip: var(--turquoise-soft);
  --news-doc: var(--mist);
  --news-soft: var(--surface-2);
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-news .news-crumb {
  padding-top: 20px;
  padding-bottom: 4px;
}

/* ---------- 首屏 ---------- */
.page-news .news-mast {
  position: relative;
  overflow: hidden;
  padding: 28px 0 48px;
  background:
    radial-gradient(120% 90% at 12% 0%, var(--sand-hi) 0%, transparent 62%),
    linear-gradient(180deg, var(--bg) 0%, var(--band) 100%);
  border-bottom: 1px solid var(--line);
}

.page-news .news-mast__band {
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(90deg, var(--crimson) 0%, var(--crimson-soft) 22%, var(--gold) 48%, var(--turquoise) 74%, var(--sand-hi) 100%);
  opacity: .95;
}

.page-news .news-mast::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(0deg, var(--line) 0 1px, transparent 1px 72px);
  opacity: .55;
  -webkit-mask-image: linear-gradient(160deg, #000 0%, transparent 72%);
  mask-image: linear-gradient(160deg, #000 0%, transparent 72%);
}

.page-news .news-mast__img {
  position: absolute;
  right: -8%;
  bottom: -18%;
  width: 78%;
  max-width: 900px;
  height: auto;
  object-fit: cover;
  opacity: .3;
  border-radius: var(--radius);
  pointer-events: none;
}

.page-news .news-mast__inner {
  position: relative;
  z-index: 2;
  display: grid;
  gap: 32px;
}

.page-news .news-eyebrow {
  margin: 0 0 14px;
  font-size: .75rem;
  letter-spacing: .22em;
  color: var(--ink-mute);
  text-transform: uppercase;
}

.page-news .news-mast h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.6rem, 9vw, 5.4rem);
  line-height: 1.02;
  letter-spacing: -.01em;
  color: var(--indigo-900);
}

.page-news .news-mast__text {
  max-width: 34em;
  margin: 0 0 24px;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-news .news-mast__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-news .news-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-news .news-stat {
  padding: 14px 12px;
  background: var(--surface);
}

.page-news .news-stat dt {
  font-size: .75rem;
  letter-spacing: .06em;
  color: var(--ink-mute);
}

.page-news .news-stat dd {
  margin: 6px 0 0;
  font-size: .95rem;
  color: var(--ink-soft);
}

.page-news .news-stat__num {
  display: block;
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 1.6rem;
  line-height: 1.1;
  color: var(--gold-ink);
}

/* ---------- 章节通用 ---------- */
.page-news .news-sec-head {
  margin-bottom: 28px;
  max-width: 46em;
}

.page-news .news-sec-head--tight {
  margin-bottom: 20px;
}

.page-news .news-sec-head h2 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  line-height: 1.2;
  color: var(--indigo-900);
}

.page-news .news-sec-head p {
  margin: 0;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* ---------- 索引区 ---------- */
.page-news .news-index {
  padding: 56px 0 8px;
}

.page-news .news-index__grid {
  display: grid;
  gap: 32px;
}

.page-news .news-side {
  display: grid;
  gap: 24px;
  align-content: start;
}

.page-news .news-side__block {
  padding: 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
}

.page-news .news-side__label {
  margin: 0 0 12px;
  font-size: .75rem;
  letter-spacing: .16em;
  color: var(--ink-mute);
}

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

.page-news .news-filter .tag-filter__item {
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--ink-soft);
  font-family: var(--font-body);
  font-size: .8rem;
  padding: 6px 10px;
  border-radius: 999px;
  cursor: pointer;
  transition: background-color 120ms ease, border-color 120ms ease, color 120ms ease;
}

.page-news .news-filter .tag-filter__item:hover {
  border-color: var(--turquoise);
  color: var(--link);
}

.page-news .news-filter .tag-filter__item[aria-pressed="true"] {
  background: var(--indigo-900);
  border-color: var(--indigo-900);
  color: var(--sand-hi);
}

.page-news .news-rail {
  display: grid;
  gap: 2px;
}

.page-news .news-rail .index-rail__link {
  display: block;
  padding: 7px 10px;
  font-size: .85rem;
  color: var(--ink-soft);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: border-color 120ms ease, color 120ms ease, background-color 120ms ease;
}

.page-news .news-rail .index-rail__link:hover,
.page-news .news-rail .index-rail__link.is-active {
  border-left-color: var(--crimson);
  color: var(--indigo-900);
  background: rgba(178, 58, 72, .06);
}

.page-news .news-side__figure {
  margin: 0;
}

.page-news .news-side__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-news .news-side__figure figcaption {
  margin-top: 8px;
  font-size: .75rem;
  line-height: 1.7;
  color: var(--ink-mute);
}

/* ---------- 条目列表 ---------- */
.page-news .news-feed {
  display: grid;
  gap: 10px;
  align-content: start;
}

.page-news .news-item {
  --cat: var(--mist);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cat);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-1);
  transition: border-color 120ms ease, transform 120ms ease;
}

.page-news .news-item:hover {
  transform: translateY(-2px);
  border-color: var(--turquoise);
}

.page-news .news-item--update { --cat: var(--news-update); }
.page-news .news-item--version { --cat: var(--news-version); }
.page-news .news-item--series { --cat: var(--news-series); }
.page-news .news-item--rule { --cat: var(--news-rule); }
.page-news .news-item--tip { --cat: var(--news-tip); }
.page-news .news-item--doc { --cat: var(--news-doc); }

.page-news .news-item summary {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas:
    "cat cat"
    "title mark"
    "meta mark";
  gap: 6px 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
}

.page-news .news-item summary::-webkit-details-marker {
  display: none;
}

.page-news .news-item summary:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.page-news .news-item__cat {
  grid-area: cat;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: .72rem;
  letter-spacing: .12em;
  color: var(--ink-mute);
}

.page-news .news-item__cat::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cat);
  flex: none;
}

.page-news .news-item__title {
  grid-area: title;
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.6;
  color: var(--indigo-900);
}

.page-news .news-item__meta {
  grid-area: meta;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: .75rem;
  color: var(--ink-mute);
}

.page-news .news-item__time {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  color: var(--gold-ink);
}

.page-news .news-item summary::after {
  grid-area: mark;
  align-self: center;
  content: "+";
  font-family: var(--font-num);
  font-size: 1.15rem;
  color: var(--turquoise);
  line-height: 1;
}

.page-news .news-item[open] summary::after {
  content: "−";
}

.page-news .news-item[open] {
  border-color: var(--turquoise);
}

.page-news .news-item__body {
  margin: 0;
  padding: 0 16px 16px;
  font-size: .92rem;
  line-height: 1.85;
  color: var(--ink-soft);
  max-width: 42em;
}

.page-news .news-feed__more {
  margin: 12px 0 0;
  font-size: .85rem;
  line-height: 1.8;
  color: var(--ink-mute);
}

.page-news .news-feed__more a {
  color: var(--link);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 系列 ---------- */
.page-news .news-series {
  padding: 56px 0;
  background: var(--surface-2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-news .news-series__grid {
  display: grid;
  gap: 16px;
}

.page-news .news-series__card {
  position: relative;
  padding: 22px 20px 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
  transition: transform 120ms ease, border-color 120ms ease;
}

.page-news .news-series__card:hover {
  transform: translateY(-2px);
  border-color: var(--series-edge, var(--turquoise));
}

.page-news .news-series__card:nth-child(1) { --series-edge: var(--turquoise); }
.page-news .news-series__card:nth-child(2) { --series-edge: var(--crimson); }
.page-news .news-series__card:nth-child(3) { --series-edge: var(--turquoise); }
.page-news .news-series__card:nth-child(4) { --series-edge: var(--gold); }

.page-news .news-series__tag {
  margin: 0 0 10px;
  font-size: .72rem;
  letter-spacing: .14em;
  color: var(--ink-mute);
}

.page-news .news-series__card h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.4rem;
  color: var(--indigo-900);
}

.page-news .news-series__body {
  margin: 0 0 14px;
  font-size: .9rem;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-news .news-series__meta {
  margin: 0 0 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: .78rem;
  line-height: 1.9;
  color: var(--ink-mute);
}

.page-news .news-series__link {
  font-size: .85rem;
  color: var(--link);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
}

.page-news .news-series__link:hover {
  color: var(--crimson);
}

/* ---------- 版本时间轴 ---------- */
.page-news .news-versions {
  padding: 56px 0;
  background: var(--indigo-900);
  color: var(--sand-hi);
}

.page-news .news-versions__grid {
  display: grid;
  gap: 32px;
}

.page-news .news-versions .news-sec-head h2 {
  color: var(--sand-hi);
}

.page-news .news-versions .news-sec-head p {
  color: var(--mist);
}

.page-news .news-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 20px;
  border-left: 1px solid rgba(244, 235, 221, .28);
  display: grid;
  gap: 22px;
}

.page-news .news-timeline .timeline__item {
  position: relative;
  padding: 0;
}

.page-news .news-timeline .timeline__item::before {
  content: "";
  position: absolute;
  left: -24.5px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 3px rgba(201, 162, 39, .18);
}

.page-news .news-timeline .timeline__time {
  margin: 0 0 4px;
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: .8rem;
  letter-spacing: .08em;
  color: var(--gold);
}

.page-news .news-timeline .timeline__title {
  margin: 0 0 6px;
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.6;
  color: var(--sand-hi);
}

.page-news .news-timeline .timeline__body {
  margin: 0;
  font-size: .88rem;
  line-height: 1.85;
  color: var(--mist);
  max-width: 40em;
}

.page-news .news-versions__more {
  margin: 24px 0 0;
  font-size: .85rem;
  color: var(--mist);
}

.page-news .news-versions__more a {
  color: var(--turquoise-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-news .news-versions__figure {
  margin: 0;
}

.page-news .news-versions__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid rgba(244, 235, 221, .22);
  border-radius: var(--radius);
}

.page-news .news-versions__figure figcaption {
  margin-top: 10px;
  font-size: .75rem;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 技巧 ---------- */
.page-news .news-tips {
  padding: 56px 0;
}

.page-news .news-tips__grid {
  display: grid;
  gap: 14px;
}

.page-news .news-tip {
  padding: 20px;
  background: var(--bg-deep);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-news .news-tip__num {
  margin: 0 0 8px;
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 2.6rem;
  line-height: 1;
  color: var(--crimson);
}

.page-news .news-tip h3 {
  margin: 0 0 8px;
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--indigo-900);
}

.page-news .news-tip p:last-child {
  margin: 0;
  font-size: .9rem;
  line-height: 1.85;
  color: var(--ink-soft);
}

/* ---------- 后记 ---------- */
.page-news .news-notebook {
  padding: 8px 0 64px;
}

.page-news .news-notebook__grid {
  display: grid;
  gap: 28px;
  padding-top: 40px;
  border-top: 1px solid var(--line);
}

.page-news .news-notebook__text p {
  margin: 0 0 16px;
  font-size: .95rem;
  line-height: 1.9;
  color: var(--ink-soft);
  max-width: 40em;
}

.page-news .news-notebook__link {
  font-size: .88rem;
  color: var(--ink-mute);
}

.page-news .news-notebook__link a {
  color: var(--link);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-news .news-notebook__figure {
  margin: 0;
}

.page-news .news-notebook__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-news .news-notebook__figure figcaption {
  margin-top: 8px;
  font-size: .75rem;
  line-height: 1.7;
  color: var(--ink-mute);
}

@media (min-width: 640px) {
  .page-news .news-mast {
    padding: 40px 0 56px;
  }
  .page-news .news-series__grid,
  .page-news .news-tips__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-news .news-stats {
    max-width: 560px;
  }
}

@media (min-width: 900px) {
  .page-news .news-mast__inner {
    grid-template-columns: minmax(0, 1fr) 260px;
    align-items: end;
    gap: 40px;
  }
  .page-news .news-stats {
    grid-template-columns: 1fr;
    max-width: none;
  }
  .page-news .news-index__grid {
    grid-template-columns: minmax(0, 280px) minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }
  .page-news .news-side {
    position: sticky;
    top: 96px;
  }
  .page-news .news-series__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }
  .page-news .news-series__card:nth-child(even) {
    transform: translateY(24px);
  }
  .page-news .news-series__card:nth-child(even):hover {
    transform: translateY(22px);
  }
  .page-news .news-versions__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
    align-items: start;
  }
  .page-news .news-tips__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
  .page-news .news-notebook__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
    align-items: start;
  }
}

@media (min-width: 1200px) {
  .page-news .news-series__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-news .news-series__card:nth-child(even) {
    transform: translateY(28px);
  }
  .page-news .news-series__card:nth-child(even):hover {
    transform: translateY(26px);
  }
  .page-news .news-item__title {
    font-size: 1.06rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-news .news-item,
  .page-news .news-series__card,
  .page-news .news-filter .tag-filter__item {
    transition: none;
  }
  .page-news .news-item:hover,
  .page-news .news-series__card:hover,
  .page-news .news-series__card:nth-child(even),
  .page-news .news-series__card:nth-child(even):hover {
    transform: none;
  }
}