.page-news {
  --news-spine: 84px;
  --news-mono: var(--f-mono);
  background: var(--c-cream);
  color: var(--c-rock);
}

/* ---------- 首屏 ---------- */
.page-news .news-hero {
  padding-top: clamp(1.5rem, 4vw, 2.75rem);
  background:
    radial-gradient(115% 85% at 84% -12%, rgba(207, 224, 230, .95) 0%, rgba(207, 224, 230, 0) 62%),
    linear-gradient(180deg, #EAF2F5 0%, rgba(250, 246, 239, 0) 74%);
}

.page-news .news-hero__intro {
  max-width: 46rem;
  margin-top: var(--space-4);
}

.page-news .news-hero__intro h1 {
  font-size: var(--fs-h1);
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--c-channel-deep);
  margin: 0 0 var(--space-4);
}

.page-news .news-hero__intro .lede {
  color: var(--c-rock);
}

.page-news .news-metrics {
  list-style: none;
  margin: var(--space-5) 0 0;
  padding: var(--space-4) 0 0;
  border-top: var(--stroke);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4) var(--gap);
}

.page-news .news-metrics__item {
  display: flex;
  flex-direction: column;
  gap: .35rem;
  min-width: 0;
}

.page-news .news-metrics__item .stat__value {
  font-family: var(--news-mono);
  font-size: 1.75rem;
  letter-spacing: -.01em;
  color: var(--c-channel);
  line-height: 1.1;
}

.page-news .news-metrics__item .stat__label {
  font-size: var(--fs-small);
  color: var(--c-rock-soft);
  line-height: 1.5;
}

.page-news .news-hero__figure {
  margin-top: var(--space-6);
}

.page-news .news-hero__figure .media {
  margin: 0;
}

.page-news .news-hero__figure .media__cap {
  margin-top: var(--space-2);
  color: var(--c-rock-soft);
}

/* ---------- 本周期要目 ---------- */
.page-news .lead-grid {
  display: grid;
  gap: var(--gap);
}

.page-news .lead-main {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  border-top: 4px solid var(--c-channel);
}

.page-news .lead-main__copy h3 {
  font-size: var(--fs-h3);
  line-height: 1.3;
  color: var(--c-channel-deep);
  margin: .35rem 0 var(--space-3);
}

.page-news .lead-main__copy p {
  margin: 0 0 var(--space-3);
}

.page-news .lead-main__media {
  margin: 0;
}

.page-news .lead-main__media .media__cap {
  display: none;
}

.page-news .lead-side {
  display: grid;
  gap: var(--gap);
}

.page-news .lead-side__item {
  border-top: 4px solid var(--c-glacier-deep);
}

.page-news .lead-side__item h3 {
  font-size: 1.25rem;
  line-height: 1.35;
  color: var(--c-channel-deep);
  margin: .35rem 0 var(--space-3);
}

.page-news .lead-side__item p {
  margin: 0 0 var(--space-3);
}

.page-news .lead-side__media {
  margin: 0;
}

/* ---------- 通用小字 ---------- */
.page-news .log-meta {
  font-family: var(--news-mono);
  font-size: var(--fs-mono);
  letter-spacing: .08em;
  color: var(--c-terra);
  margin: 0;
  text-transform: uppercase;
}

.page-news .log-note {
  margin: 0;
  padding-left: var(--space-3);
  border-left: 3px solid var(--c-terra);
  color: var(--c-rock);
  font-size: var(--fs-small);
}

/* ---------- 筛选胶囊 ---------- */
.page-news .filter {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-bottom: var(--space-5);
  position: relative;
}

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

.page-news .filter__pill {
  display: inline-flex;
  align-items: center;
  padding: .45rem 1.1rem;
  border: var(--stroke);
  border-radius: var(--r-pill);
  background: rgba(255, 255, 255, .7);
  color: var(--c-channel-deep);
  font-size: var(--fs-small);
  cursor: pointer;
  transition: background-color .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}

.page-news .filter__pill:hover {
  border-color: var(--c-channel);
}

.page-news .filter__input:checked + .filter__pill {
  background: var(--c-channel);
  border-color: var(--c-channel);
  color: var(--c-white);
}

.page-news .filter__input:focus-visible + .filter__pill {
  outline: 2px solid var(--c-save);
  outline-offset: 2px;
}

/* 纯前端筛选：不支持 :has 时全部显示 */
.page-news:has(#tag-version:checked) .log-item:not([data-tag="version"]),
.page-news:has(#tag-path:checked) .log-item:not([data-tag="path"]),
.page-news:has(#tag-doc:checked) .log-item:not([data-tag="doc"]),
.page-news:has(#tag-topic:checked) .log-item:not([data-tag="topic"]) {
  display: none;
}

/* ---------- 期数刻度 + 日志流 ---------- */
.page-news .ledger {
  display: grid;
  gap: var(--space-5);
}

.page-news .ledger__ticks {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: var(--space-4);
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-news .tick {
  display: inline-block;
  font-family: var(--news-mono);
  font-size: var(--fs-mono);
  letter-spacing: .08em;
  color: var(--c-rock-soft);
  text-decoration: none;
  padding: .3rem 0;
  border-bottom: 2px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-news .tick:hover,
.page-news .tick:focus-visible {
  color: var(--c-channel);
  border-bottom-color: var(--c-channel);
}

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

.page-news .log-item {
  background: var(--c-white);
  border-left: 4px solid var(--c-glacier-deep);
  border-radius: 0 var(--r-card) var(--r-card) 0;
  padding: var(--space-4) var(--space-4) var(--space-4) var(--space-5);
  margin-bottom: var(--space-4);
  box-shadow: var(--shadow-soft);
  scroll-margin-top: 150px;
  transition: width .35s var(--ease), transform .2s var(--ease);
}

.page-news .log-item:last-child {
  margin-bottom: 0;
}

.page-news .log-item[data-tag="version"] { border-left-color: var(--c-channel); }
.page-news .log-item[data-tag="path"]    { border-left-color: var(--c-terra); }
.page-news .log-item[data-tag="doc"]     { border-left-color: var(--c-moss); }
.page-news .log-item[data-tag="topic"]   { border-left-color: var(--c-save); }

.page-news .log-item__title {
  font-size: 1.2rem;
  line-height: 1.35;
  color: var(--c-channel-deep);
  margin: .35rem 0 var(--space-3);
}

.page-news .log-item > p {
  margin: 0 0 var(--space-3);
}

.page-news .log-item > p:last-child {
  margin-bottom: 0;
}

/* ---------- 发布节奏 ---------- */
.page-news .news-cadence {
  border-top: 1px solid rgba(156, 188, 201, .5);
}

.page-news .cadence {
  display: grid;
  gap: var(--space-5);
}

.page-news .cadence__copy h2 {
  font-size: var(--fs-h2);
  line-height: 1.22;
  letter-spacing: -.01em;
  color: var(--c-channel-deep);
  margin: .4rem 0 var(--space-4);
}

.page-news .cadence__copy p {
  margin: 0 0 var(--space-3);
  max-width: 40rem;
}

.page-news .cadence__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--stroke);
}

.page-news .cadence__row {
  display: grid;
  gap: .35rem;
  padding: var(--space-4) 0;
  border-bottom: var(--stroke);
}

.page-news .cadence__k {
  font-family: var(--news-mono);
  font-size: var(--fs-mono);
  letter-spacing: .08em;
  color: var(--c-save-ink);
}

.page-news .cadence__v {
  color: var(--c-rock);
  line-height: 1.7;
}

/* ---------- 专题索引 ---------- */
.page-news .topics-grid {
  display: grid;
  gap: var(--space-5);
}

.page-news .topics-grid__cover {
  margin: 0;
}

.page-news .topics-grid__cover .media__cap {
  margin-top: var(--space-2);
  color: var(--c-rock-soft);
}

.page-news .topics-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-4);
}

.page-news .topic {
  padding-bottom: var(--space-4);
  border-bottom: var(--stroke);
}

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

.page-news .topic__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
}

.page-news .topic__name {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--c-channel-deep);
}

.page-news .topic__count {
  font-family: var(--news-mono);
  font-size: var(--fs-mono);
  color: var(--c-rock-soft);
  white-space: nowrap;
}

.page-news .topic__desc {
  margin: .4rem 0 .75rem;
  font-size: var(--fs-small);
  color: var(--c-rock-soft);
  line-height: 1.7;
}

.page-news .topic__bar {
  height: 6px;
  border-radius: var(--r-pill);
  background: rgba(156, 188, 201, .35);
  overflow: hidden;
}

.page-news .topic__bar > span {
  display: block;
  width: var(--p, 0%);
  height: 100%;
  border-radius: var(--r-pill);
  background: linear-gradient(90deg, var(--c-channel) 0%, var(--c-save) 100%);
}

/* ---------- 回溯与跟进 ---------- */
.page-news .news-back {
  border-top: 1px solid rgba(156, 188, 201, .5);
}

.page-news .back-grid {
  display: grid;
  gap: var(--gap);
}

.page-news .back-card h3 {
  font-size: 1.2rem;
  line-height: 1.35;
  color: var(--c-channel-deep);
  margin: .35rem 0 var(--space-3);
}

.page-news .back-card p {
  margin: 0 0 var(--space-3);
}

.page-news .back-card p:last-child {
  margin-bottom: 0;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-news .news-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-news .cadence__row {
    grid-template-columns: 6.5rem minmax(0, 1fr);
    gap: var(--space-4);
    align-items: baseline;
  }

  .page-news .back-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-news .back-card--wide {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .page-news .lead-grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-news .ledger {
    grid-template-columns: var(--news-spine) minmax(0, 1fr);
    gap: var(--space-6);
    align-items: start;
  }

  .page-news .ledger__ticks {
    flex-direction: column;
    gap: .25rem;
    overflow: visible;
    position: sticky;
    top: 130px;
    padding-top: var(--space-4);
  }

  .page-news .tick {
    display: flex;
    align-items: center;
    gap: .6rem;
    border-bottom: 0;
    padding: .35rem 0;
  }

  .page-news .tick::after {
    content: "";
    flex: 1 1 auto;
    height: var(--line);
    background: var(--c-glacier-deep);
    opacity: .6;
  }

  .page-news .tick:hover::after {
    opacity: 1;
    background: var(--c-channel);
  }

  .page-news .cadence {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: var(--space-6);
    align-items: start;
  }

  .page-news .topics-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: var(--space-6);
    align-items: start;
  }

  .page-news .back-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr) minmax(0, 1fr);
  }

  .page-news .back-card--wide {
    grid-column: auto;
  }

  /* 越往下卡片越窄，形成翻阅的节奏 */
  .page-news .ledger__stream .log-item:nth-child(1) { width: 100%; }
  .page-news .ledger__stream .log-item:nth-child(2) { width: 96%; }
  .page-news .ledger__stream .log-item:nth-child(3) { width: 92%; }
  .page-news .ledger__stream .log-item:nth-child(4) { width: 88%; }
  .page-news .ledger__stream .log-item:nth-child(5) { width: 84%; }
  .page-news .ledger__stream .log-item:nth-child(6) { width: 80%; }
}

@media (min-width: 1100px) {
  .page-news .lead-main {
    flex-direction: row;
    align-items: stretch;
    gap: var(--space-5);
  }

  .page-news .lead-main__copy {
    flex: 1 1 58%;
    min-width: 0;
  }

  .page-news .lead-main__media {
    flex: 0 1 38%;
    align-self: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-news .log-item,
  .page-news .filter__pill,
  .page-news .tick {
    transition: none;
  }
}

.page-news {
  --p: var(--gap);
}