.page-news {
  --news-rail-card: 76vw;
  --news-rail-wide: 88vw;
  display: block;
}

.page-news .section {
  padding: 56px 0;
}

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

.page-news .section__sub {
  color: var(--mist);
  font-size: var(--f-15);
  max-width: 46ch;
  margin-top: 8px;
}

.page-news .chip {
  text-decoration: none;
}

.page-news .chip--ghost {
  background: transparent;
  color: var(--mist);
  border-color: var(--line);
}

/* ---------- 首屏 ---------- */
.page-news .news-hero {
  padding-top: 32px;
  padding-bottom: 40px;
}

.page-news .news-hero__grid {
  display: grid;
  gap: 28px;
}

.page-news .news-hero__title {
  margin: 10px 0 0;
  font-size: clamp(30px, 7vw, 62px);
  line-height: 1.14;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.page-news .news-hero__text {
  margin: 18px 0 0;
  max-width: 42ch;
  color: var(--mist);
  font-size: var(--f-15);
  line-height: 1.8;
}

.page-news .news-hero__index {
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.page-news .news-hero__index-title {
  margin: 0;
  color: var(--mist);
  font-size: var(--f-12);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.page-news .news-hero__index-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0 0;
  padding: 0;
}

/* ---------- 置顶条目 ---------- */
.page-news .feature {
  display: grid;
  gap: 0;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--deck);
  overflow: hidden;
  transition: border-color 0.24s ease, transform 0.24s ease;
}

.page-news .feature:hover,
.page-news .feature:focus-within {
  border-color: var(--cyan);
  transform: translateY(-2px);
}

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

.page-news .feature__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  max-width: 100%;
}

.page-news .feature__body {
  padding: 22px 20px 26px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

.page-news .feature__stamp {
  color: var(--mist);
  font-size: var(--f-12);
  letter-spacing: 0.08em;
}

.page-news .feature__title {
  margin: 0;
  font-size: clamp(22px, 3.4vw, 34px);
  line-height: 1.24;
  font-weight: 800;
}

.page-news .feature__text {
  margin: 0;
  color: var(--mist);
  font-size: var(--f-15);
  line-height: 1.8;
  max-width: 46ch;
}

.page-news .feature__meta {
  margin: 4px 0 0;
  color: var(--cyan);
  font-size: var(--f-12);
  letter-spacing: 0.08em;
}

/* ---------- 专题横栏 ---------- */
.page-news .topic-rail {
  display: flex;
  gap: 16px;
  overflow-x: auto;
  padding: 8px 0 22px;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-news .topic-rail:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

.page-news .topic-rail > * {
  flex: 0 0 var(--news-rail-card);
  scroll-snap-align: start;
}

.page-news .topic-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px 18px;
  background: var(--deck);
  border: 1px solid var(--line);
  border-radius: var(--r);
  transition: border-color 0.22s ease, transform 0.22s ease;
}

.page-news .topic-card:hover,
.page-news .topic-card:focus-within {
  border-color: var(--cyan);
  transform: translateY(-2px);
}

.page-news .topic-card--wide {
  flex-basis: var(--news-rail-wide);
}

.page-news .topic-card__no {
  margin: 0;
  color: var(--cyan);
  font-size: var(--f-12);
  letter-spacing: 0.14em;
}

.page-news .topic-card__title {
  margin: 0;
  font-size: var(--f-24);
  line-height: 1.25;
  font-weight: 800;
}

.page-news .topic-card__text {
  margin: 0;
  color: var(--mist);
  font-size: var(--f-15);
  line-height: 1.8;
}

.page-news .topic-card__meta {
  margin: auto 0 0;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  color: var(--mist);
  font-size: var(--f-12);
  letter-spacing: 0.06em;
}

.page-news .topic-card--photo {
  padding: 0;
  background: var(--section);
  overflow: hidden;
}

.page-news .topic-card--photo .figure__frame {
  border: 0;
  border-radius: 0;
  margin: 0;
}

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

.page-news .topic-card__cap {
  padding: 10px 14px;
  color: var(--mist);
  font-size: var(--f-12);
  letter-spacing: 0.06em;
}

/* ---------- 版本更新 ---------- */
.page-news .release-list {
  border-top: 1px solid var(--line);
}

.page-news .release {
  display: grid;
  gap: 8px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
  transition: border-color 0.22s ease;
}

.page-news .release:hover,
.page-news .release:focus-within {
  border-bottom-color: var(--cyan-deep);
}

.page-news .release__no {
  margin: 0;
  color: var(--orange);
  font-size: var(--f-18);
  font-weight: 700;
  letter-spacing: 0.08em;
}

.page-news .release__body {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-news .release__title {
  margin: 0;
  font-size: var(--f-18);
  line-height: 1.4;
  font-weight: 700;
}

.page-news .release__text {
  margin: 0;
  color: var(--mist);
  font-size: var(--f-15);
  line-height: 1.8;
  max-width: 42ch;
}

.page-news .release__extra {
  margin: 0;
  color: var(--mist);
  font-size: var(--f-14);
  line-height: 1.75;
  max-width: 42ch;
  overflow: hidden;
}

.page-news .release__meta {
  margin: 2px 0 0;
  color: var(--cyan);
  font-size: var(--f-12);
  letter-spacing: 0.08em;
}

.page-news .release-side {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 28px;
}

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

.page-news .release-side__note {
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 18px;
  background: var(--section);
}

.page-news .release-side__note p {
  margin: 0 0 10px;
  color: var(--mist);
  font-size: var(--f-14);
  line-height: 1.8;
}

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

.page-news .release-side__note-title {
  color: var(--cyan) !important;
  font-size: var(--f-12);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

/* ---------- 轮次观察 ---------- */
.page-news .observe-list {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.page-news .observe {
  border-left: 1px solid var(--line);
  padding: 4px 0 4px 18px;
  transition: border-color 0.22s ease;
}

.page-news .observe:hover {
  border-left-color: var(--cyan);
}

.page-news .observe__title {
  margin: 0 0 8px;
  font-size: var(--f-18);
  line-height: 1.45;
  font-weight: 700;
}

.page-news .observe__text {
  margin: 0 0 10px;
  color: var(--mist);
  font-size: var(--f-15);
  line-height: 1.8;
  max-width: 42ch;
}

.page-news .observe__meta {
  margin: 0;
  color: var(--mist);
  font-size: var(--f-12);
  letter-spacing: 0.06em;
}

.page-news .spark {
  display: block;
  width: 100%;
  max-width: 260px;
  height: auto;
  margin: 4px 0 12px;
}

.page-news .spark__line {
  fill: none;
  stroke: var(--cyan);
  stroke-width: 2;
  stroke-linejoin: round;
  stroke-linecap: round;
}

.page-news .observe-side {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 28px;
}

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

.page-news .observe-side__meters {
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--deck);
  padding: 18px;
}

.page-news .observe-side__meters-title {
  margin: 0 0 16px;
  color: var(--mist);
  font-size: var(--f-12);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.page-news .observe-side__meters .meter {
  margin-bottom: 14px;
}

.page-news .observe-side__meters .meter:last-child {
  margin-bottom: 0;
}

.page-news .meter__label {
  margin: 0 0 6px;
  color: var(--mist);
  font-size: var(--f-12);
  letter-spacing: 0.06em;
}

.page-news .meter__track {
  display: block;
  position: relative;
  height: 6px;
  background: var(--section);
  border-radius: var(--r);
  overflow: hidden;
}

.page-news .meter__fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--mid), var(--cyan));
}

.page-news .meter__value {
  margin: 6px 0 0;
  color: var(--white);
  font-size: var(--f-12);
  letter-spacing: 0.08em;
}

/* ---------- 归档与订阅 ---------- */
.page-news .archive-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: var(--section);
}

.page-news .archive-card .card__text {
  color: var(--mist);
}

.page-news .archive-more {
  margin-top: 26px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--section);
  padding: 0 18px;
}

.page-news .archive-more summary {
  cursor: pointer;
  padding: 16px 0;
  color: var(--cyan);
  font-size: var(--f-14);
  letter-spacing: 0.08em;
  list-style: none;
}

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

.page-news .archive-more summary::before {
  content: "+ ";
  font-family: var(--mono);
}

.page-news .archive-more[open] summary::before {
  content: "− ";
}

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

.page-news .archive-more__list {
  list-style: none;
  margin: 0;
  padding: 0 0 18px;
  display: grid;
  gap: 12px;
}

.page-news .archive-more__list li {
  color: var(--mist);
  font-size: var(--f-14);
  line-height: 1.75;
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.page-news .archive-more__list .mono {
  color: var(--cyan-deep);
  margin-right: 10px;
}

.page-news .archive-sub {
  margin-top: 26px;
  border-top: 1px solid var(--line);
  padding-top: 20px;
  display: grid;
  gap: 12px;
}

.page-news .archive-sub p {
  margin: 0;
  color: var(--mist);
  font-size: var(--f-14);
  line-height: 1.85;
  max-width: 60ch;
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-news .section {
    padding: 76px 0;
  }

  .page-news .release {
    grid-template-columns: 104px minmax(0, 1fr);
    gap: 20px;
    align-items: start;
    padding: 24px 0;
  }

  .page-news .release__no {
    padding-top: 2px;
  }

  .page-news .topic-rail > * {
    flex-basis: 340px;
  }

  .page-news .topic-card--wide {
    flex-basis: 460px;
  }

  .page-news .topic-card--photo {
    flex-basis: 300px;
  }
}

@media (min-width: 900px) {
  .page-news .news-hero {
    padding-top: 56px;
  }

  .page-news .news-hero__grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.55fr);
    gap: 56px;
    align-items: end;
  }

  .page-news .feature {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  }

  .page-news .feature__media img {
    aspect-ratio: auto;
    height: 100%;
    min-height: 420px;
  }

  .page-news .feature__body {
    padding: 40px 36px;
    justify-content: center;
  }

  .page-news .release-side {
    margin-top: 0;
  }

  .page-news .observe-side {
    margin-top: 0;
  }
}

@media (min-width: 1080px) {
  .page-news .topic-rail > * {
    flex-basis: 360px;
  }

  .page-news .topic-card--wide {
    flex-basis: 520px;
  }

  .page-news .topic-card--photo {
    flex-basis: 320px;
  }
}

@media (hover: hover) and (min-width: 900px) {
  .page-news .release__extra {
    max-height: 0;
    opacity: 0;
    transition: max-height 0.28s ease, opacity 0.2s ease;
  }

  .page-news .release:hover .release__extra,
  .page-news .release:focus-within .release__extra {
    max-height: 140px;
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-news .feature,
  .page-news .topic-card,
  .page-news .release__extra {
    transition: none;
  }
}