/* ===========================================================
   专题与更新 /topics/  —  页面专属样式（作用域 .page-news）
   =========================================================== */

.page-news {
  --news-text: #C6CCDE;
  --news-dim: #8C93A8;
  --news-line: var(--ink-700);
  --news-gap: clamp(20px, 3vw, 32px);
  background:
    radial-gradient(110% 55% at 6% -8%, rgba(192, 51, 140, .16), transparent 62%),
    radial-gradient(95% 50% at 100% 2%, rgba(47, 191, 155, .12), transparent 60%);
  background-repeat: no-repeat;
  color: var(--news-text);
}

.page-news .news-crumb {
  padding-top: clamp(18px, 3vw, 30px);
}

/* ---------- 报头 ---------- */

.page-news .news-masthead {
  padding-top: clamp(20px, 3vw, 34px);
  padding-bottom: clamp(36px, 6vw, 72px);
}

.page-news .news-masthead__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 56px);
  align-items: end;
}

.page-news .news-eyebrow {
  font-size: var(--fs-12);
  letter-spacing: var(--ls-anno);
  color: var(--gold);
  text-transform: uppercase;
  margin: 0 0 18px;
}

.page-news h1 {
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 8vw, 4rem);
  line-height: 1.08;
  letter-spacing: var(--ls-title);
  font-weight: 900;
  color: var(--paper);
  margin: 0 0 22px;
}

.page-news .news-lede {
  max-width: 34em;
  font-size: var(--fs-18);
  line-height: var(--lh-body);
  color: var(--news-text);
  margin: 0 0 32px;
}

.page-news .news-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 44px;
  list-style: none;
  margin: 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--gold-line);
}

.page-news .news-stats li {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-news .news-stats__num {
  font-size: var(--fs-28);
  font-weight: 700;
  color: var(--gold);
  line-height: 1;
}

.page-news .news-stats__label {
  font-size: var(--fs-13);
  color: var(--news-dim);
  letter-spacing: .06em;
}

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

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

/* ---------- 章节标题微调 ---------- */

.page-news .section-head .section-title {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: var(--ls-title);
  color: var(--paper);
}

.page-news .section-head .section-note,
.page-news .section-head .section-index {
  color: var(--news-dim);
}

/* ---------- 本周归档 ---------- */

.page-news .week-rail {
  margin-bottom: 28px;
}

.page-news .week-rail__list {
  display: flex;
  gap: 10px;
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-news .week-rail__list li {
  flex: 0 0 auto;
}

.page-news .week-chip {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 9px 18px 9px 14px;
  border: 1px solid var(--ink-700);
  border-radius: 999px;
  background: rgba(18, 26, 56, .55);
  text-decoration: none;
  color: var(--news-text);
  font-size: var(--fs-13);
  letter-spacing: .08em;
  transition: border-color .2s var(--ease), color .2s var(--ease), background-color .2s var(--ease);
}

.page-news .week-chip::before {
  content: "";
  width: 2px;
  height: 14px;
  background: var(--gold);
  opacity: .5;
  transition: opacity .2s var(--ease), background-color .2s var(--ease);
}

.page-news .week-chip:hover,
.page-news .week-chip:focus-visible {
  border-color: var(--gold-line);
  background: rgba(232, 182, 90, .08);
  color: var(--gold-soft);
}

.page-news .week-chip:hover::before,
.page-news .week-chip:focus-visible::before {
  opacity: 1;
}

.page-news .news-archive__top {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--news-gap);
  margin-bottom: clamp(32px, 5vw, 52px);
}

.page-news .news-archive__aside {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-news .news-archive__aside .media-frame {
  margin: 0;
}

.page-news .news-archive__aside-note {
  font-size: var(--fs-13);
  line-height: 1.85;
  color: var(--news-dim);
  padding-left: 14px;
  border-left: 2px solid var(--gold-line);
  margin: 0;
}

.page-news .week-group {
  margin-bottom: clamp(30px, 5vw, 48px);
}

.page-news .week-group__label {
  display: flex;
  align-items: baseline;
  gap: 16px;
  font-size: var(--fs-13);
  font-weight: 400;
  letter-spacing: .16em;
  color: var(--gold);
  margin: 0 0 6px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--gold-line);
}

.page-news .week-group__count {
  font-size: var(--fs-12);
  letter-spacing: .1em;
  color: var(--news-dim);
}

/* ---------- 可展开条目 ---------- */

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

.page-news .entry {
  border-bottom: 1px solid var(--news-line);
}

.page-news .entry__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 16px;
  padding: 18px 40px 18px 0;
  position: relative;
  cursor: pointer;
  list-style: none;
  transition: background-color .18s var(--ease);
}

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

.page-news .entry__head::marker {
  content: "";
}

.page-news .entry__head::after {
  content: "";
  position: absolute;
  right: 12px;
  top: 24px;
  width: 8px;
  height: 8px;
  border-right: 1.5px solid var(--gold);
  border-bottom: 1.5px solid var(--gold);
  transform: rotate(45deg);
  transition: transform .22s var(--ease), top .22s var(--ease);
}

.page-news .entry[open] .entry__head::after {
  transform: rotate(-135deg);
  top: 27px;
}

.page-news .entry[open] .entry__head {
  background: rgba(232, 182, 90, .05);
}

.page-news .entry__head:hover {
  background: rgba(244, 246, 251, .04);
}

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

.page-news .entry__time {
  flex: 0 0 4.5rem;
  font-size: var(--fs-13);
  color: var(--gold);
  letter-spacing: .04em;
}

.page-news .entry__title {
  flex: 1 1 15rem;
  font-size: var(--fs-16);
  font-weight: 500;
  line-height: 1.6;
  color: var(--paper);
}

.page-news .entry__body {
  padding: 4px 40px 22px 0;
}

.page-news .entry__body p {
  max-width: 44em;
  font-size: var(--fs-16);
  line-height: var(--lh-body);
  color: var(--news-text);
  margin: 0 0 14px;
}

.page-news .entry__link {
  display: inline-block;
  font-size: var(--fs-13);
  letter-spacing: .06em;
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid var(--gold-line);
  padding-bottom: 2px;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-news .entry__link:hover,
.page-news .entry__link:focus-visible {
  color: var(--gold-soft);
  border-color: var(--gold);
}

/* ---------- 四条常设专题 ---------- */

.page-news .topic-rows {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--news-line);
}

.page-news .topic-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  padding: clamp(22px, 3.5vw, 34px) 0;
  border-bottom: 1px solid var(--news-line);
}

.page-news .topic-row__spine {
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-news .topic-row__name {
  font-family: var(--font-display);
  font-size: var(--fs-22);
  font-weight: 900;
  letter-spacing: .1em;
  color: var(--paper);
}

.page-news .topic-row__content {
  max-width: 46em;
}

.page-news .topic-row__cadence {
  font-size: var(--fs-13);
  letter-spacing: .06em;
  color: var(--magenta-soft);
  margin: 0 0 10px;
}

.page-news .topic-row__content p:last-child {
  font-size: var(--fs-16);
  line-height: var(--lh-body);
  color: var(--news-text);
  margin: 0;
}

/* ---------- 版本迭代 ---------- */

.page-news .news-versions__figure {
  margin: 0 0 var(--news-gap);
}

.page-news .news-table-wrap {
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
  border: 1px solid var(--news-line);
  border-radius: var(--radius);
  background: rgba(18, 26, 56, .6);
}

.page-news .news-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  font-size: var(--fs-16);
}

.page-news .news-table__caption {
  text-align: left;
  padding: 16px 20px 14px;
  font-size: var(--fs-13);
  letter-spacing: .06em;
  color: var(--news-dim);
  border-bottom: 1px solid var(--news-line);
}

.page-news .news-table th {
  text-align: left;
  font-size: var(--fs-13);
  font-weight: 500;
  letter-spacing: .1em;
  color: var(--gold);
  padding: 12px 20px;
  background: rgba(27, 36, 71, .55);
  border-bottom: 1px solid var(--gold-line);
  white-space: nowrap;
}

.page-news .news-table td {
  padding: 15px 20px;
  border-bottom: 1px solid var(--ink-700);
  color: var(--news-text);
  line-height: 1.65;
  vertical-align: top;
}

.page-news .news-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-news .news-table tbody tr:hover td {
  background: rgba(244, 246, 251, .035);
}

.page-news .news-table td.mono {
  color: var(--gold-soft);
  font-size: var(--fs-13);
  white-space: nowrap;
}

.page-news .news-table a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid var(--gold-line);
  white-space: nowrap;
}

.page-news .news-table a:hover,
.page-news .news-table a:focus-visible {
  color: var(--gold-soft);
  border-color: var(--gold);
}

.page-news .news-versions__foot {
  margin: 18px 0 0;
  font-size: var(--fs-13);
  line-height: 1.85;
  color: var(--news-dim);
}

/* ---------- 适配公告 ---------- */

.page-news .news-fit__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--news-gap);
  align-items: start;
}

.page-news .news-fit__aside {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.page-news .news-fit__aside .media-frame {
  margin: 0;
}

.page-news .news-fit__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-news .news-fit__facts li {
  font-size: var(--fs-13);
  line-height: 1.8;
  color: var(--news-dim);
  padding-left: 16px;
  border-left: 2px solid var(--teal);
}

.page-news .news-fit__facts .mono {
  color: var(--teal);
  font-size: var(--fs-16);
  font-weight: 600;
  margin-right: 6px;
}

/* ---------- 使用技巧 ---------- */

.page-news .tip-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--news-line);
  border: 1px solid var(--news-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-news .tip-card {
  background: var(--ink-900);
  padding: clamp(22px, 3vw, 30px);
  transition: background-color .2s var(--ease);
}

.page-news .tip-card:hover {
  background: var(--ink-800);
}

.page-news .tip-card__no {
  font-size: var(--fs-13);
  letter-spacing: .2em;
  color: var(--magenta-soft);
  margin: 0 0 14px;
}

.page-news .tip-card__title {
  font-family: var(--font-display);
  font-size: var(--fs-22);
  font-weight: 900;
  letter-spacing: .08em;
  color: var(--paper);
  margin: 0 0 12px;
}

.page-news .tip-card p:last-child {
  font-size: var(--fs-16);
  line-height: var(--lh-body);
  color: var(--news-text);
  margin: 0;
}

/* ---------- 归档回溯 ---------- */

.page-news .backtrack__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--news-gap);
  align-items: start;
}

.page-news .backtrack__panel {
  padding: clamp(24px, 3.4vw, 36px);
  border-radius: var(--radius);
}

.page-news .backtrack__sub {
  font-family: var(--font-display);
  font-size: var(--fs-18);
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--gold);
  margin: 0 0 10px;
  padding-left: 14px;
  border-left: 3px solid var(--gold);
}

.page-news .backtrack__panel p {
  font-size: var(--fs-16);
  line-height: var(--lh-body);
  color: var(--news-text);
  margin: 0 0 26px;
  max-width: 40em;
}

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

.page-news .backtrack__panel a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid var(--gold-line);
}

.page-news .backtrack__panel a:hover,
.page-news .backtrack__panel a:focus-visible {
  color: var(--gold-soft);
  border-color: var(--gold);
}

.page-news .backtrack__aside {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-news .backtrack__card {
  padding: 24px 26px;
  border-radius: var(--radius);
  border: 1px solid var(--gold-line);
  background: linear-gradient(150deg, rgba(232, 182, 90, .1), rgba(18, 26, 56, .7));
}

.page-news .backtrack__card--teal {
  border-color: rgba(47, 191, 155, .35);
  background: linear-gradient(150deg, rgba(47, 191, 155, .1), rgba(18, 26, 56, .7));
}

.page-news .backtrack__card-label {
  font-size: var(--fs-12);
  letter-spacing: .2em;
  color: var(--news-dim);
  margin: 0 0 10px;
}

.page-news .backtrack__card-value {
  font-family: var(--font-display);
  font-size: var(--fs-22);
  font-weight: 900;
  letter-spacing: .06em;
  color: var(--gold);
  margin: 0 0 10px;
}

.page-news .backtrack__card--teal .backtrack__card-value {
  color: var(--teal);
}

.page-news .backtrack__card-text {
  font-size: var(--fs-13);
  line-height: 1.85;
  color: var(--news-text);
  margin: 0;
}

.page-news .backtrack__card-text a {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 191, 155, .4);
}

.page-news .backtrack__cta {
  margin-top: clamp(32px, 5vw, 52px);
  padding-top: 28px;
  border-top: 1px solid var(--gold-hair);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.page-news .backtrack__cta p {
  font-size: var(--fs-16);
  line-height: var(--lh-body);
  color: var(--news-dim);
  margin: 0;
  max-width: 36em;
}

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

/* ---------- 焦点可见性 ---------- */

.page-news a:focus-visible,
.page-news summary:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 760px) {
  .page-news .tip-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-news .topic-row {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 28px;
    align-items: start;
  }

  .page-news .backtrack__cta {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

@media (min-width: 960px) {
  .page-news .news-masthead__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(40px, 5vw, 72px);
  }

  .page-news .news-archive__top {
    grid-template-columns: minmax(0, 7fr) minmax(0, 3fr);
    gap: clamp(32px, 4vw, 56px);
  }

  .page-news .news-fit__grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    gap: clamp(32px, 4vw, 52px);
  }

  .page-news .backtrack__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 3fr);
    gap: clamp(32px, 4vw, 56px);
  }

  .page-news .topic-row {
    grid-template-columns: 240px minmax(0, 1fr);
  }
}

@media (min-width: 1200px) {
  .page-news .tip-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 759px) {
  .page-news .entry__time {
    flex: 0 0 100%;
  }

  .page-news .entry__head {
    padding-right: 34px;
  }

  .page-news .entry__body {
    padding-right: 12px;
  }

  .page-news .news-stats {
    gap: 18px 32px;
  }

  .page-news .news-table {
    min-width: 560px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-news .entry__head::after,
  .page-news .week-chip,
  .page-news .entry__head,
  .page-news .tip-card {
    transition: none;
  }
}
</main>