/* ============================================================
   专题中心 /topics/
   ============================================================ */

.page-news {
  --news-rail: 236px;
  --news-gap: clamp(32px, 4.5vw, 74px);
  overflow-x: clip;
}

.page-news *,
.page-news *::before,
.page-news *::after {
  box-sizing: border-box;
}

/* ---------- 首屏 ---------- */

.page-news .news-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-bottom: 1px solid var(--hair);
  background:
    radial-gradient(88% 120% at 84% -10%, rgba(15, 92, 122, .55) 0%, rgba(15, 92, 122, 0) 62%),
    radial-gradient(72% 110% at 4% 108%, rgba(74, 42, 107, .45) 0%, rgba(74, 42, 107, 0) 58%),
    linear-gradient(178deg, var(--abyss-2) 0%, var(--abyss) 88%);
}

.page-news .news-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(0deg, var(--grid-soft) 0 1px, transparent 1px 88px),
    repeating-linear-gradient(90deg, var(--grid-soft) 0 1px, transparent 1px 88px);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .9), rgba(0, 0, 0, .08));
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .9), rgba(0, 0, 0, .08));
}

.page-news .news-hero__inner {
  padding-block: clamp(52px, 8vw, 104px) clamp(40px, 5.5vw, 76px);
}

.page-news .news-hero__title {
  margin: clamp(14px, 2vw, 22px) 0 0;
  max-width: 15em;
  font-size: clamp(32px, 6vw, 76px);
  font-weight: 800;
  line-height: 1.07;
  letter-spacing: -.02em;
  color: var(--ink);
  text-wrap: balance;
}

.page-news .news-hero__lede {
  margin: clamp(20px, 2.6vw, 30px) 0 0;
  max-width: 40em;
  font-size: clamp(16px, 1.4vw, 18px);
  line-height: 1.85;
  color: var(--muted);
}

.page-news .news-hero__stats {
  margin-top: clamp(34px, 4.5vw, 56px);
}

/* ---------- 画布：左索引 + 右流 ---------- */

.page-news .news-canvas {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(40px, 5vw, 56px);
  padding-block: clamp(44px, 6vw, 88px) clamp(64px, 8vw, 118px);
  min-width: 0;
}

@media (min-width: 960px) {
  .page-news .news-canvas {
    grid-template-columns: var(--news-rail) minmax(0, 1fr);
    gap: var(--news-gap);
  }
}

/* ---------- 左侧索引栏 ---------- */

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

.page-news .news-rail__inner {
  display: flex;
  flex-direction: column;
  gap: 26px;
}

@media (min-width: 960px) {
  .page-news .news-rail__inner {
    position: sticky;
    top: calc(var(--header-h) + 26px);
  }
}

.page-news .news-rail__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}

.page-news .news-index,
.page-news .news-scale {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--hair);
}

.page-news .news-index__link,
.page-news .news-scale__link {
  display: grid;
  align-items: center;
  gap: 10px;
  padding: 11px 2px;
  border-bottom: 1px solid var(--hair);
  color: var(--ink);
  font-size: 15px;
  line-height: 1.4;
  text-decoration: none;
  transition: color .2s var(--ease), padding-inline-start .2s var(--ease), background-color .2s var(--ease);
}

.page-news .news-index__link {
  grid-template-columns: auto minmax(0, 1fr) auto;
}

.page-news .news-scale__link {
  grid-template-columns: 14px auto minmax(0, 1fr);
}

.page-news .news-index__link:hover,
.page-news .news-index__link:focus-visible,
.page-news .news-scale__link:hover,
.page-news .news-scale__link:focus-visible {
  color: var(--pulse);
  padding-inline-start: 10px;
  background: rgba(47, 232, 214, .05);
  outline: none;
}

.page-news .news-index__no {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--pulse);
}

.page-news .news-index__name,
.page-news .news-scale__txt {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.page-news .news-index__count {
  font-size: 12px;
  color: var(--muted);
}

.page-news .news-scale__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--pulse);
  box-shadow: 0 0 0 3px rgba(47, 232, 214, .12);
}

.page-news .news-scale__link > .mono {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
}

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

.page-news .news-scale__link:hover .news-scale__txt,
.page-news .news-scale__link:focus-visible .news-scale__txt {
  color: var(--pulse);
}

@media (max-width: 959px) {
  .page-news .news-rail__inner {
    gap: 18px;
  }

  .page-news .news-index,
  .page-news .news-scale {
    display: flex;
    flex-wrap: nowrap;
    gap: 8px;
    overflow-x: auto;
    overscroll-behavior-x: contain;
    border-top: 0;
    padding-bottom: 6px;
    scrollbar-width: thin;
  }

  .page-news .news-index > li,
  .page-news .news-scale > li {
    flex: 0 0 auto;
  }

  .page-news .news-index__link,
  .page-news .news-scale__link {
    border: 1px solid var(--hair);
    border-radius: 999px;
    padding: 8px 14px;
    font-size: 14px;
  }

  .page-news .news-index__link {
    grid-template-columns: auto auto;
  }

  .page-news .news-index__count {
    display: none;
  }

  .page-news .news-index__link:hover,
  .page-news .news-index__link:focus-visible,
  .page-news .news-scale__link:hover,
  .page-news .news-scale__link:focus-visible {
    padding-inline-start: 14px;
  }
}

/* ---------- 右侧内容流 ---------- */

.page-news .news-stream {
  display: flex;
  flex-direction: column;
  gap: clamp(56px, 7vw, 104px);
  min-width: 0;
}

.page-news .feed,
.page-news .versions,
.page-news .collections,
.page-news .revisit {
  min-width: 0;
  scroll-margin-top: calc(var(--header-h) + 26px);
}

/* ---------- 栏目标题 ---------- */

.page-news .feed__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 18px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--hair);
}

.page-news .feed__no {
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--pulse);
}

.page-news .feed__title {
  margin: 0;
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.02em;
  color: var(--ink);
}

.page-news .feed__note {
  margin-left: auto;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--gold);
  white-space: nowrap;
}

.page-news .feed__desc {
  flex: 1 1 100%;
  margin: 0;
  max-width: 44em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 图片容器 ---------- */

.page-news .news-media {
  position: relative;
  margin-top: clamp(20px, 2.8vw, 30px);
  overflow: hidden;
  border: 1px solid var(--hair);
  background: linear-gradient(150deg, var(--abyss-3) 0%, var(--lake) 62%, var(--dusk) 100%);
}

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

.page-news .news-media--3x2 {
  aspect-ratio: 3 / 2;
}

.page-news .news-media--16x7 {
  aspect-ratio: 16 / 7;
}

/* ---------- 条目列表 ---------- */

.page-news .feed__list {
  list-style: none;
  margin: clamp(6px, 1vw, 12px) 0 0;
  padding: 0;
}

.page-news .feed__list > li {
  border-bottom: 1px solid var(--grid-soft);
}

.page-news .feed__list > li:first-child {
  border-top: 1px solid var(--grid-soft);
}

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

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

.page-news .entry__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) 18px;
  align-items: start;
  gap: 12px 16px;
  width: 100%;
  padding: 18px 6px 18px 12px;
  border: 0;
  border-left: 2px solid transparent;
  background: transparent;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: background-color .22s var(--ease), border-color .22s var(--ease);
}

.page-news .entry__head:hover,
.page-news .entry__head:focus-visible {
  border-left-color: var(--pulse);
  background: linear-gradient(90deg, rgba(47, 232, 214, .06), transparent 66%);
  outline: none;
}

.page-news .entry__idx {
  padding-top: 4px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
}

.page-news .entry__main {
  display: block;
  min-width: 0;
}

.page-news .entry__title {
  display: block;
  font-size: clamp(16px, 1.5vw, 18px);
  font-weight: 700;
  line-height: 1.55;
  letter-spacing: -.01em;
  color: var(--ink);
  transition: color .2s var(--ease);
}

.page-news .entry__head:hover .entry__title,
.page-news .entry__head:focus-visible .entry__title {
  color: var(--pulse);
}

.page-news .entry__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.page-news .entry__body {
  padding: 0 6px 20px calc(2.5em + 28px);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--muted);
}

.page-news .entry__body p {
  margin: 0;
  max-width: 42em;
}

/* ---------- 版本刻度 ---------- */

.page-news .ver-track {
  position: relative;
  list-style: none;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
}

.page-news .ver-track::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, rgba(47, 232, 214, .7) 0%, var(--grid) 55%, rgba(30, 110, 122, .14) 100%);
}

.page-news .ver-item {
  position: relative;
  padding: 0 0 clamp(26px, 3.4vw, 40px) 34px;
  scroll-margin-top: calc(var(--header-h) + 36px);
}

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

.page-news .ver-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 15px;
  height: 15px;
  border: 1px solid var(--pulse);
  border-radius: 50%;
  background: var(--abyss);
  animation: news-node 4s ease-in-out infinite;
}

@keyframes news-node {
  0%, 100% { box-shadow: 0 0 0 3px rgba(47, 232, 214, .05); }
  50%      { box-shadow: 0 0 0 9px rgba(47, 232, 214, .13); }
}

.page-news .ver-item__tag {
  margin: 0;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--pulse);
}

.page-news .ver-item__title {
  margin: 8px 0 0;
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-news .ver-item__text {
  margin: 10px 0 0;
  max-width: 42em;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 专题合集 ---------- */

.page-news .collections__lede {
  margin: 16px 0 0;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}

.page-news .collage {
  display: grid;
  gap: clamp(20px, 2.6vw, 32px);
  margin-top: clamp(26px, 3.6vw, 42px);
}

.page-news .collage__stack {
  display: grid;
  gap: clamp(20px, 2.6vw, 32px);
}

@media (min-width: 860px) {
  .page-news .collage {
    grid-template-columns: 1.05fr .95fr;
    align-items: start;
  }
}

.page-news .collage__item {
  position: relative;
  padding: clamp(18px, 2.4vw, 28px) 0 clamp(18px, 2.4vw, 28px) clamp(18px, 2.2vw, 26px);
  border-left: 2px solid var(--grid);
  transition: border-color .25s var(--ease), background-color .25s var(--ease);
}

.page-news .collage__item:hover,
.page-news .collage__item:focus-within {
  border-left-color: var(--pulse);
  background: linear-gradient(90deg, rgba(47, 232, 214, .055), transparent 68%);
}

.page-news .collage__item--lead {
  border-left-color: var(--pulse);
  background: linear-gradient(165deg, rgba(15, 92, 122, .3) 0%, rgba(74, 42, 107, .14) 62%, transparent 100%);
}

.page-news .collage__item--lead:hover {
  background: linear-gradient(165deg, rgba(15, 92, 122, .4) 0%, rgba(74, 42, 107, .2) 62%, transparent 100%);
}

.page-news .collage__tag {
  margin: 0;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--pulse);
}

.page-news .collage__title {
  margin: 10px 0 0;
  font-size: clamp(19px, 2.2vw, 24px);
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -.015em;
  color: var(--ink);
}

.page-news .collage__text {
  margin: 12px 0 0;
  max-width: 40em;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--muted);
}

.page-news .collage__meta {
  margin: 16px 0 0;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--gold);
}

/* ---------- 回看与收藏 ---------- */

.page-news .revisit__grid {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  margin-top: clamp(26px, 3.6vw, 42px);
}

@media (min-width: 900px) {
  .page-news .revisit__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: start;
  }
}

.page-news .revisit__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(18px, 2.4vw, 28px);
}

.page-news .revisit__step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 16px;
  padding-bottom: clamp(18px, 2.4vw, 26px);
  border-bottom: 1px solid var(--grid-soft);
}

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

.page-news .revisit__no {
  grid-row: span 2;
  font-size: 22px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--pulse);
  opacity: .85;
}

.page-news .revisit__title {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
}

.page-news .revisit__text {
  grid-column: 2;
  margin: 6px 0 0;
  max-width: 42em;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--muted);
}

.page-news .revisit__side {
  padding: clamp(22px, 2.8vw, 32px);
  border: 1px solid rgba(255, 255, 255, .07);
  background: linear-gradient(160deg, rgba(74, 42, 107, .34) 0%, rgba(8, 15, 27, .1) 72%);
}

.page-news .revisit__side-title {
  margin: 0;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--pulse);
}

.page-news .revisit__side-text {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-news .revisit__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

/* ---------- 动效降级 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-news .ver-item::before {
    animation: none;
  }

  .page-news .entry__head,
  .page-news .entry__title,
  .page-news .collage__item,
  .page-news .news-index__link,
  .page-news .news-scale__link {
    transition: none;
  }
}
<<<END>>>