.page-news {
  --news-rule: rgba(214, 240, 247, .18);
  --news-rule-soft: rgba(214, 240, 247, .10);
  --news-lime-deep: #5F9C1C;
  --news-ink-soft: #22505C;
}

/* ---------- 首屏 ---------- */
.page-news .topics-hero {
  padding: clamp(20px, 4vw, 48px) 0 clamp(28px, 5vw, 56px);
}

.page-news .topics-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  margin-top: clamp(18px, 3vw, 34px);
}

.page-news .topics-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-8);
  line-height: 1.04;
  letter-spacing: -.03em;
  color: var(--white);
  text-wrap: balance;
}

.page-news .topics-hero__lede {
  max-width: 38em;
  margin: clamp(16px, 2vw, 22px) 0 0;
  color: var(--ice);
  font-size: var(--fs-3);
  line-height: var(--lh-body);
}

.page-news .topics-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(20px, 3vw, 28px);
}

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

/* ---------- 四栏目录 ---------- */
.page-news .topics-index-section {
  padding-top: clamp(12px, 2vw, 20px);
}

.page-news .topics-index {
  display: grid;
  gap: 1px;
  margin-top: clamp(18px, 3vw, 30px);
  background: var(--news-rule);
  border: 1px solid var(--news-rule);
}

.page-news .topics-index__item {
  display: block;
  padding: clamp(18px, 2.6vw, 28px) clamp(16px, 2.2vw, 24px);
  background: var(--ink-night);
  border-left: 2px solid transparent;
  color: var(--ice);
  text-decoration: none;
  transition: background var(--fast) ease, border-color var(--fast) ease;
}

.page-news .topics-index__item:hover,
.page-news .topics-index__item:focus-visible {
  background: var(--plateau);
  border-left-color: var(--lime);
}

.page-news .topics-index__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 2.6vw, 30px);
  letter-spacing: .02em;
  color: var(--mist);
  transition: color var(--fast) ease;
}

.page-news .topics-index__item:hover .topics-index__num,
.page-news .topics-index__item:focus-visible .topics-index__num {
  color: var(--lime);
}

.page-news .topics-index__name {
  display: block;
  margin-top: 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-4);
  letter-spacing: -.02em;
  color: var(--white);
}

.page-news .topics-index__desc {
  display: block;
  margin-top: 6px;
  font-size: var(--fs-2);
  line-height: 1.65;
  color: var(--mist);
}

/* ---------- 栏目区块 ---------- */
.page-news .topic-block {
  position: relative;
}

.page-news .topic-block__head {
  display: grid;
  gap: clamp(16px, 3vw, 30px);
  align-items: end;
  padding-bottom: clamp(6px, 1.5vw, 12px);
  border-bottom: 1px solid var(--news-rule-soft);
}

.page-news .topic-block__lede {
  max-width: 36em;
  margin: 12px 0 0;
  color: var(--ice);
  font-size: var(--fs-3);
  line-height: var(--lh-body);
}

.page-news .topic-block__media {
  margin: 0;
}

.page-news .topic-block:target .topic-block__head {
  border-bottom-color: var(--lime);
}

.page-news .topic-block:target .section-title {
  color: var(--lime);
}

/* ---------- 文章条目 ---------- */
.page-news .topic-list {
  list-style: none;
  display: grid;
  gap: clamp(12px, 1.8vw, 18px);
  margin: clamp(20px, 3vw, 34px) 0 0;
  padding: 0;
}

.page-news .topic-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  padding: 14px 0 14px 14px;
  border-left: 2px solid var(--news-rule-soft);
  transition: border-color var(--fast) ease, background var(--fast) ease;
}

.page-news .topic-item:hover,
.page-news .topic-item:focus-within {
  border-left-color: var(--lime);
}

.page-news .topic-item__num {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: var(--fs-2);
  letter-spacing: .02em;
  color: var(--mist);
}

.page-news .topic-item__body {
  min-width: 0;
}

.page-news .topic-item__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.page-news .topic-item__when {
  font-family: var(--font-mono);
  font-size: var(--fs-1);
  letter-spacing: .02em;
  color: var(--mist);
}

.page-news .topic-item__title {
  margin: 8px 0 0;
  font-size: var(--fs-4);
  line-height: 1.4;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-news .topic-item__desc {
  max-width: 34em;
  margin: 8px 0 0;
  color: var(--ice);
  font-size: var(--fs-2);
  line-height: 1.72;
  opacity: .86;
}

/* ---------- 浅色方法带 ---------- */
.page-news .topic-band {
  padding: clamp(34px, 6vw, 76px) 0;
  margin: clamp(24px, 4vw, 48px) 0;
}

.page-news .topic-band--paper {
  background: var(--paper);
  color: var(--ink);
}

.page-news .topic-band--paper .eyebrow {
  color: #48707C;
}

.page-news .topic-band--paper .section-title {
  color: var(--ink);
}

.page-news .topic-band--paper .topic-block__lede {
  color: var(--news-ink-soft);
}

.page-news .topic-band--paper .topic-block__head {
  border-bottom-color: rgba(6, 35, 44, .18);
}

.page-news .topic-band--paper .topic-item {
  border-left-color: rgba(6, 35, 44, .16);
}

.page-news .topic-band--paper .topic-item:hover,
.page-news .topic-band--paper .topic-item:focus-within {
  border-left-color: var(--news-lime-deep);
}

.page-news .topic-band--paper .topic-item__num,
.page-news .topic-band--paper .topic-item__when {
  color: #4E7581;
}

.page-news .topic-band--paper .topic-item__title {
  color: var(--ink);
}

.page-news .topic-band--paper .topic-item__desc {
  color: var(--news-ink-soft);
  opacity: 1;
}

.page-news .topic-band--paper .link-underline {
  color: var(--ink);
}

.page-news .topic-band--paper .link-underline:hover {
  color: var(--news-lime-deep);
}

/* ---------- 推进顺序时间轴 ---------- */
.page-news .topic-timeline .log-list {
  margin-top: clamp(20px, 3vw, 32px);
  padding-left: clamp(14px, 2vw, 22px);
  border-left: 1px solid var(--news-rule);
}

.page-news .topic-timeline .log-item {
  padding-bottom: clamp(18px, 2.4vw, 26px);
}

.page-news .topic-timeline .log-item__time {
  color: var(--lime);
  letter-spacing: .04em;
}

.page-news .topic-timeline .log-item__title {
  color: var(--white);
}

.page-news .topic-timeline .log-item__body {
  max-width: 44em;
  color: var(--ice);
  opacity: .84;
}

/* ---------- 内容线索 ---------- */
.page-news .topic-contact {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  padding: clamp(22px, 3.4vw, 40px);
  border-left: 2px solid var(--lime);
}

.page-news .topic-contact__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-6);
  line-height: 1.18;
  letter-spacing: -.02em;
  color: var(--white);
}

.page-news .topic-contact__lede {
  max-width: 40em;
  margin: 14px 0 0;
  color: var(--ice);
  font-size: var(--fs-3);
  line-height: var(--lh-body);
}

.page-news .topic-contact .muted {
  margin: 12px 0 0;
  font-size: var(--fs-2);
  line-height: 1.7;
}

.page-news .topic-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-content: start;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-news .topics-index {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-news .topic-contact__actions .btn {
    flex: 0 1 auto;
  }
}

@media (min-width: 900px) {
  .page-news .topic-block__head {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  }

  .page-news .topic-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(24px, 3.4vw, 48px);
    padding-bottom: 26px;
  }

  .page-news .topic-list > .topic-item:nth-child(even) {
    transform: translateY(26px);
  }

  .page-news .topic-contact {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, .8fr);
    align-items: end;
  }
}

@media (min-width: 1080px) {
  .page-news .topics-index {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-news .topics-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-news .topic-list > .topic-item:nth-child(even) {
    transform: none;
  }

  .page-news .topics-index__item,
  .page-news .topic-item,
  .page-news .topics-index__num {
    transition: none;
  }
}