.page-news {
  --news-rail: 236px;
  --news-panel: linear-gradient(168deg, var(--ink-800) 0%, var(--ink-750) 100%);
  --news-tl: linear-gradient(180deg, var(--mint) 0%, var(--mint-soft) 28%, var(--line-strong) 64%, rgba(94, 116, 138, 0.16) 100%);
}

/* ---------- 首屏 ---------- */
.page-news .news-hero {
  display: grid;
  gap: 22px;
  padding: clamp(24px, 4vw, 44px) 0 clamp(18px, 3vw, 30px);
}

.page-news .news-hero h1 {
  margin: 14px 0 18px;
  font-family: var(--font-sans);
  font-size: clamp(30px, 6vw, 54px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--white);
  max-width: 16em;
}

.page-news .news-hero .lede {
  max-width: 44em;
  color: var(--mist);
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.75;
}

.page-news .news-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-news .news-board {
  position: relative;
  padding: 22px 20px 16px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(53, 196, 160, 0.15) 0%, rgba(53, 196, 160, 0) 58%),
    var(--ink-800);
  overflow: hidden;
}

.page-news .news-board::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--mint) 0%, var(--mint-soft) 42%, rgba(53, 196, 160, 0) 100%);
}

.page-news .news-board__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.page-news .news-board__title {
  margin: 0;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--white);
}

.page-news .news-board__list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 11px;
}

.page-news .news-board__list li {
  font-size: 14px;
  line-height: 1.65;
  color: var(--mist);
  padding-bottom: 11px;
  border-bottom: 1px dashed var(--line-soft);
}

.page-news .news-board__list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-news .news-board__list .mono {
  display: block;
  margin-bottom: 2px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mint);
}

.page-news .news-board__foot {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

/* ---------- 双栏骨架 ---------- */
.page-news .news-layout {
  display: grid;
  gap: clamp(24px, 3vw, 38px);
  padding-bottom: clamp(40px, 6vw, 76px);
}

.page-news .news-main {
  min-width: 0;
}

.page-news .news-main .section + .section {
  margin-top: clamp(38px, 5vw, 64px);
}

.page-news .section-head {
  max-width: 46em;
}

.page-news .section-head h2 {
  margin: 8px 0 0;
  font-size: clamp(24px, 3.6vw, 34px);
  font-weight: 800;
  line-height: 1.24;
  letter-spacing: -0.015em;
  color: var(--white);
}

.page-news .section-head .muted {
  margin-top: 12px;
  font-size: 15px;
  line-height: 1.75;
}

/* ---------- 图片框 ---------- */
.page-news .news-figure {
  margin: 26px 0 0;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-800);
}

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

.page-news .media-frame__caption {
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 筛选 ---------- */
.page-news .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 20px;
}

.page-news .filter-chip {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
}

/* ---------- 时间轴 ---------- */
.page-news .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-news .timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  border-radius: 2px;
  background: var(--news-tl);
}

.page-news .timeline__item {
  position: relative;
  padding: 0 0 16px 34px;
}

.page-news .timeline__item:last-child {
  padding-bottom: 0;
}

.page-news .timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 24px;
  width: 16px;
  height: 16px;
  box-sizing: border-box;
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--line-strong);
}

.page-news .timeline__item--fresh::before {
  background: var(--mint);
  border-color: var(--mint);
  box-shadow: 0 0 0 5px rgba(53, 196, 160, 0.14);
}

.page-news .notice {
  padding: 16px 18px 12px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  background: var(--news-panel);
  transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
}

.page-news .notice:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong);
  box-shadow: var(--shadow);
}

.page-news .notice__meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.page-news .notice__stamp {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-news .timeline__item--fresh .notice__stamp {
  color: var(--mint);
}

.page-news .notice__title {
  margin: 0 0 8px;
  font-size: clamp(16px, 1.9vw, 19px);
  font-weight: 700;
  line-height: 1.45;
  color: var(--white);
}

.page-news .notice__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--mist);
  max-width: 62ch;
}

.page-news .notice__desc a {
  color: var(--mint-soft);
  text-decoration: underline;
  text-decoration-color: rgba(141, 227, 204, 0.45);
  text-underline-offset: 3px;
}

.page-news .notice__desc a:hover {
  color: var(--brand);
  text-decoration-color: currentColor;
}

.page-news .notice__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--line-soft);
}

.page-news .notice__no {
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-news .copy-btn {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

/* ---------- 版本对照 ---------- */
.page-news .version-block {
  display: grid;
  gap: 24px;
  margin-top: 26px;
}

.page-news .version-block .news-figure {
  margin: 0;
}

.page-news .delta-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-news .delta {
  padding: 12px 14px 12px 16px;
  border-left: 2px solid var(--brand);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: linear-gradient(90deg, rgba(240, 90, 60, 0.09) 0%, rgba(240, 90, 60, 0) 72%);
}

.page-news .delta__name {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-news .delta__pair {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  font-size: 17px;
  font-weight: 700;
}

.page-news .delta__from {
  color: var(--mist);
  text-decoration: line-through;
  text-decoration-color: var(--line-strong);
  font-weight: 500;
}

.page-news .delta__arrow {
  color: var(--brand);
  font-size: 14px;
}

.page-news .delta__to {
  color: var(--brand);
}

.page-news .delta__note {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-news .delta__note a {
  color: var(--amber);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(242, 184, 75, 0.45);
}

.page-news .news-figure--compare {
  max-width: 560px;
}

/* ---------- 归档 ---------- */
.page-news .archive-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 26px;
}

.page-news .archive-card {
  display: grid;
  gap: 4px;
  padding: 16px 16px 18px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  background: rgba(18, 42, 64, 0.72);
  text-decoration: none;
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.page-news .archive-card:hover {
  border-color: var(--brand);
  background: rgba(23, 53, 83, 0.9);
  transform: translateY(-2px);
}

.page-news .archive-card__when {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--mint);
}

.page-news .archive-card__count {
  font-family: var(--font-mono);
  font-size: clamp(28px, 4vw, 38px);
  font-weight: 700;
  line-height: 1.05;
  color: var(--white);
}

.page-news .archive-card__what {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mist);
}

.page-news .archive-note {
  display: grid;
  gap: 20px;
  margin-top: 24px;
  padding-top: 22px;
  border-top: 1px dashed var(--line-soft);
}

.page-news .archive-note .archive-figure {
  margin: 0;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-800);
}

.page-news .archive-note .archive-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-news .archive-note__body p {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-news .archive-note__body p:last-child {
  margin-bottom: 0;
}

.page-news .archive-note__body a {
  color: var(--mint-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(141, 227, 204, 0.45);
}

.page-news .archive-note__body a:hover {
  color: var(--brand);
  text-decoration-color: currentColor;
}

/* ---------- 索引栏（窄屏） ---------- */
.page-news .index-rail {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
}

.page-news .index-rail__title {
  width: 100%;
  margin: 0 0 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--line);
}

.page-news .index-rail__link {
  flex: 1 1 auto;
  min-width: 132px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  background: rgba(18, 42, 64, 0.6);
  font-size: 14px;
  color: var(--white);
  text-decoration: none;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.page-news .index-rail__link:hover,
.page-news .index-rail__link.is-active {
  border-color: var(--brand);
  color: var(--brand);
}

.page-news .index-rail__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mint);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-news .timeline__item {
    padding-left: 40px;
  }

  .page-news .notice {
    padding: 18px 22px 14px;
  }
}

@media (min-width: 900px) {
  .page-news .news-hero {
    grid-template-columns: minmax(0, 1.32fr) minmax(300px, 0.68fr);
    align-items: start;
    gap: 34px;
  }
}

@media (min-width: 760px) {
  .page-news .archive-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-news .archive-note {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: start;
  }
}

@media (min-width: 860px) {
  .page-news .version-block {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 980px) {
  .page-news .news-layout {
    grid-template-columns: minmax(0, 1fr) var(--news-rail);
    align-items: start;
  }

  .page-news .index-rail {
    position: sticky;
    top: 26px;
    display: block;
    padding: 18px 16px;
    border: 1px solid var(--line-soft);
    border-radius: var(--radius);
    background: rgba(18, 42, 64, 0.72);
  }

  .page-news .index-rail__title {
    margin-bottom: 12px;
  }

  .page-news .index-rail__link {
    display: flex;
    width: 100%;
    min-width: 0;
    margin-bottom: 6px;
    padding: 8px 10px;
    border-color: transparent;
    background: transparent;
  }

  .page-news .index-rail__link:last-child {
    margin-bottom: 0;
  }

  .page-news .index-rail__link:hover,
  .page-news .index-rail__link.is-active {
    background: rgba(240, 90, 60, 0.1);
    border-color: transparent;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-news .notice,
  .page-news .archive-card,
  .page-news .index-rail__link {
    transition: none;
  }

  .page-news .notice:hover,
  .page-news .archive-card:hover {
    transform: none;
  }
}