.page-news {
  --news-rail-w: 244px;
  --news-gap: clamp(28px, 4vw, 64px);
  background-color: var(--ink-900);
  color: var(--bone);
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-news .breadcrumb {
  padding-top: clamp(16px, 2.5vw, 28px);
}

/* ---------- 首屏 ---------- */
.page-news .news-masthead {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
  padding-block: clamp(20px, 3vw, 36px) clamp(28px, 5vw, 56px);
  border-bottom: 1px solid var(--hairline);
}

.page-news .news-masthead::before {
  content: "";
  display: block;
  grid-column: 1 / -1;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
  margin-bottom: clamp(14px, 2.5vw, 26px);
}

.page-news .news-masthead__copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.page-news .news-masthead h1 {
  font-family: var(--font-head);
  font-size: clamp(34px, 6vw, 60px);
  line-height: 1.02;
  letter-spacing: -0.01em;
  color: var(--bone);
  margin: 10px 0 14px;
}

.page-news .news-lede {
  margin: 0;
  max-width: 56ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--bone);
  opacity: 0.88;
}

.page-news .news-masthead__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 22px 0 0;
}

.page-news .news-masthead__stats {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(18px, 3vw, 44px);
  width: 100%;
  margin: 26px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--hairline-soft);
  list-style: none;
}

.page-news .stat__value {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1;
  color: var(--cyan);
  display: block;
}

.page-news .stat__value em {
  font-size: 0.44em;
  font-style: normal;
  letter-spacing: 0.08em;
  color: var(--grey);
  margin-left: 4px;
}

.page-news .stat__label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--grey);
}

.page-news .news-masthead__media {
  aspect-ratio: 16 / 9;
  border: 1px solid var(--hairline);
}

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

/* ---------- 主画布 ---------- */
.page-news .news-canvas {
  display: grid;
  gap: var(--news-gap);
  padding-top: clamp(28px, 5vw, 56px);
}

.page-news .news-rail__list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  border-left: 1px solid var(--hairline);
}

.page-news .news-rail__list a {
  display: flex;
  gap: 10px;
  align-items: baseline;
  margin-left: -1px;
  padding: 11px 14px;
  border-left: 2px solid transparent;
  color: var(--grey);
  font-size: 15px;
  text-decoration: none;
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

.page-news .news-rail__list a:hover,
.page-news .news-rail__list a:focus-visible {
  color: var(--cyan);
  border-left-color: var(--orange);
  background-color: rgba(34, 245, 200, 0.06);
}

.page-news .news-rail__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--grey);
}

.page-news .news-rail__aside {
  margin-top: clamp(22px, 3vw, 34px);
  padding: 18px 16px;
  background-color: var(--ink-700);
  border-left: 2px solid var(--orange);
  display: grid;
  gap: 10px;
  justify-items: start;
}

.page-news .news-rail__aside-copy {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--grey);
}

/* ---------- 区块 ---------- */
.page-news .news-block {
  padding-block: clamp(24px, 4vw, 44px);
  border-top: 1px solid var(--hairline-soft);
}

.page-news .news-stream > .news-block:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-news .news-block__head {
  display: grid;
  gap: 8px;
  margin-bottom: clamp(16px, 2.5vw, 28px);
}

.page-news .news-block__head h2 {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.06;
  color: var(--bone);
}

.page-news .news-block__intro {
  margin: 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--grey);
}

.page-news .news-block__body {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

.page-news .news-block__media {
  aspect-ratio: 3 / 2;
  border: 1px solid var(--hairline);
}

.page-news .news-block__foot {
  margin: clamp(16px, 2.5vw, 24px) 0 0;
}

.page-news .news-block__link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--link);
  text-decoration: none;
  border-bottom: 1px solid var(--hairline);
  padding-bottom: 2px;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-news .news-block__link:hover,
.page-news .news-block__link:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 条目流 ---------- */
.page-news .news-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-news .news-item {
  padding: clamp(14px, 2vw, 20px) 14px;
  border-top: 1px solid var(--hairline-soft);
  border-left: 2px solid transparent;
  transition: background-color 0.18s ease, border-color 0.18s ease;
}

.page-news .news-item:first-child {
  border-top-color: var(--hairline);
}

.page-news .news-item:hover,
.page-news .news-item:focus-within {
  background-color: var(--ink-800);
  border-left-color: var(--cyan);
}

.page-news .news-item__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 8px;
}

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

.page-news .news-item__title {
  margin: 0 0 8px;
  font-size: clamp(17px, 1.7vw, 20px);
  font-weight: 700;
  line-height: 1.45;
  color: var(--bone);
}

.page-news .news-item:hover .news-item__title,
.page-news .news-item:focus-within .news-item__title {
  color: var(--cyan);
}

.page-news .news-item__sum {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--grey);
}

/* ---------- 历史索引 ---------- */
.page-news .news-archive {
  border-bottom: 1px solid var(--hairline-soft);
}

.page-news .news-archive__group {
  border-top: 1px solid var(--hairline-soft);
}

.page-news .news-archive__group summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding: 16px 4px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-size: clamp(18px, 2.1vw, 23px);
  color: var(--bone);
  transition: color 0.18s ease;
}

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

.page-news .news-archive__group summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--orange);
}

.page-news .news-archive__group[open] summary::after {
  content: "\2212";
}

.page-news .news-archive__group summary:hover,
.page-news .news-archive__group summary:focus-visible {
  color: var(--cyan);
}

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

.page-news .news-archive__list {
  list-style: none;
  margin: 0;
  padding: 0 0 16px;
  display: grid;
  gap: 10px;
}

.page-news .news-archive__list li {
  display: grid;
  gap: 4px;
  padding-left: 16px;
  border-left: 1px solid var(--hairline);
}

.page-news .news-archive__title {
  font-size: 15px;
  line-height: 1.6;
  color: var(--bone);
  opacity: 0.86;
}

/* ---------- 焦点反馈 ---------- */
.page-news a:focus-visible,
.page-news summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 600px) and (max-width: 999px) {
  .page-news .news-rail__list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    border-left: 0;
    gap: 4px;
  }

  .page-news .news-rail__list a {
    border-left: 1px solid var(--hairline);
    margin-left: 0;
  }

  .page-news .news-rail__aside {
    max-width: 60ch;
  }
}

@media (min-width: 900px) {
  .page-news .news-masthead {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: end;
  }

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

  .page-news .news-item__sum {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .page-news .news-item:hover .news-item__sum,
  .page-news .news-item:focus-within .news-item__sum {
    display: block;
    -webkit-line-clamp: unset;
    line-clamp: unset;
    overflow: visible;
  }
}

@media (min-width: 1000px) {
  .page-news .news-canvas {
    grid-template-columns: var(--news-rail-w) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
  }

  .page-news .news-rail {
    position: sticky;
    top: 132px;
    align-self: start;
  }

  .page-news .news-archive__list li {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: baseline;
    gap: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-news .news-item,
  .page-news .news-rail__list a,
  .page-news .news-block__link,
  .page-news .news-archive__group summary {
    transition: none;
  }
}