.page-news {
  background:
    radial-gradient(120% 70% at 82% -6%, rgba(32, 215, 232, 0.13), transparent 62%),
    radial-gradient(90% 60% at 4% 18%, rgba(255, 107, 74, 0.08), transparent 60%),
    var(--blue-900);
  color: var(--sand-050);
  padding-top: calc(var(--header-h) + clamp(24px, 4vw, 52px));
  padding-bottom: clamp(40px, 7vw, 88px);
  overflow-x: clip;
}

.page-news h1,
.page-news h2,
.page-news h3 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.015em;
  margin: 0;
}

.page-news p {
  margin: 0;
}

.page-news a {
  color: var(--cyan-300);
}

.page-news .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
  list-style: none;
  margin: 0 0 clamp(18px, 3vw, 30px);
  padding: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  color: var(--on-dark-dim);
}

.page-news .breadcrumb a {
  color: var(--on-dark-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-news .breadcrumb a:hover {
  color: var(--cyan-300);
  border-bottom-color: var(--line);
}

.page-news .breadcrumb li + li::before {
  content: "/";
  margin-right: 0.35rem;
  color: var(--mist-400);
}

/* 首屏 */
.page-news .masthead-grid {
  display: grid;
  gap: clamp(20px, 3.5vw, 40px);
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
  padding-bottom: clamp(26px, 4vw, 44px);
}

.page-news .masthead-grid h1 {
  font-size: clamp(1.95rem, 7.4vw, 4.05rem);
  line-height: 1;
  max-width: 15ch;
}

.page-news .masthead-note {
  border-left: 1px solid var(--line);
  padding-left: clamp(14px, 2.4vw, 24px);
}

.page-news .eyebrow {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan-500);
  margin: 0 0 0.7rem;
}

.page-news .masthead-lead {
  font-size: clamp(0.95rem, 2.4vw, 1.06rem);
  line-height: 1.85;
  color: var(--on-dark);
  max-width: 46ch;
}

.page-news .masthead-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.4rem;
  list-style: none;
  margin: 1.3rem 0 0;
  padding: 0;
  font-size: 0.78rem;
  color: var(--on-dark-dim);
}

.page-news .masthead-stats li {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
}

.page-news .masthead-stats .num {
  font-size: 1.32rem;
  font-weight: 700;
  color: var(--cyan-300);
  letter-spacing: -0.01em;
}

/* 区块骨架 */
.page-news .news-block {
  padding-block: clamp(30px, 5vw, 64px);
}

.page-news .news-block + .news-block {
  border-top: 1px solid var(--line-soft);
}

/* 头条 */
.page-news .lead-grid {
  display: grid;
  gap: clamp(22px, 3.4vw, 36px);
  grid-template-columns: minmax(0, 1fr);
}

.page-news .lead-story {
  position: relative;
  display: grid;
  align-items: end;
  min-height: clamp(340px, 52vw, 470px);
  overflow: hidden;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: var(--blue-800);
  box-shadow: var(--shadow-card);
}

.page-news .lead-story > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.6;
}

.page-news .lead-story::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(3, 17, 28, 0.15) 0%, rgba(3, 17, 28, 0.55) 46%, rgba(3, 17, 28, 0.94) 100%);
}

.page-news .lead-body {
  position: relative;
  z-index: 1;
  padding: clamp(20px, 3.6vw, 38px);
  display: grid;
  gap: 0.85rem;
  justify-items: start;
}

.page-news .lead-top {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.page-news .lead-time {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--coral-500);
}

.page-news .lead-body h2 {
  font-size: clamp(1.42rem, 4.4vw, 2.35rem);
  line-height: 1.14;
  max-width: 22ch;
}

.page-news .lead-body p {
  font-size: clamp(0.9rem, 2.3vw, 1rem);
  line-height: 1.8;
  color: var(--on-dark);
  max-width: 52ch;
}

.page-news .lead-side {
  display: grid;
  gap: 0;
  align-content: start;
}

.page-news .side-story {
  display: grid;
  gap: 0.5rem;
  padding-block: clamp(14px, 2.6vw, 20px);
  border-top: 1px solid var(--line-soft);
}

.page-news .side-story:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-news .side-top {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  flex-wrap: wrap;
}

.page-news .side-time {
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--mist-400);
}

.page-news .side-story h3 {
  font-size: clamp(1rem, 2.9vw, 1.14rem);
  line-height: 1.35;
  color: var(--sand-050);
  transition: color 0.2s var(--ease);
}

.page-news .side-story:hover h3 {
  color: var(--cyan-300);
}

.page-news .side-story p {
  font-size: 0.85rem;
  line-height: 1.72;
  color: var(--on-dark-dim);
}

/* 条目流 */
.page-news .stream-grid {
  display: grid;
  gap: clamp(22px, 3.4vw, 48px);
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
}

.page-news .stream-rail h2 {
  font-size: clamp(1.1rem, 3.2vw, 1.35rem);
  margin-bottom: 0.9rem;
  color: var(--sand-050);
}

.page-news .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.page-news .filter-btn {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.05em;
  padding: 0.5rem 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--line-soft);
  background: transparent;
  color: var(--on-dark);
  cursor: pointer;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-news .filter-btn:hover,
.page-news .filter-btn:focus-visible {
  border-color: var(--cyan-500);
  color: var(--cyan-300);
  outline: none;
}

.page-news .filter-btn.is-active {
  background: var(--cyan-500);
  border-color: var(--cyan-500);
  color: var(--blue-900);
  font-weight: 700;
}

.page-news .rail-note {
  margin-top: 1rem;
  font-size: 0.78rem;
  line-height: 1.75;
  color: var(--mist-400);
  max-width: 30ch;
}

.page-news .stream-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line-soft);
}

.page-news .stream-item {
  padding-block: clamp(18px, 3vw, 28px);
  border-bottom: 1px solid var(--line-soft);
  display: grid;
  gap: 0.55rem;
}

.page-news .stream-head {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  flex-wrap: wrap;
}

.page-news .stream-time {
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--mist-400);
}

.page-news .stream-item h3 {
  font-size: clamp(1.12rem, 3.3vw, 1.5rem);
  line-height: 1.28;
  transition: color 0.2s var(--ease);
}

.page-news .stream-item:hover h3 {
  color: var(--cyan-300);
}

.page-news .stream-item > p,
.page-news .stream-feature-text > p {
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--on-dark);
  max-width: 62ch;
}

.page-news .stream-item > p {
  margin: 0;
}

.page-news .stream-feature-text {
  display: grid;
  gap: 0.55rem;
}

.page-news .stream-feature {
  display: grid;
  gap: clamp(16px, 2.6vw, 28px);
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
  margin-top: 0.4rem;
}

.page-news .news-shot {
  aspect-ratio: 3 / 2;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.page-news .news-shot--tall {
  aspect-ratio: 3 / 4;
  max-width: 300px;
}

.page-news .news-shot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* 折叠要点 */
.page-news .stream-more {
  margin-top: 0.35rem;
  border-left: 1px solid var(--line-soft);
  padding-left: 0.85rem;
}

.page-news .stream-more summary {
  list-style: none;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--coral-500);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.2rem 0;
}

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

.page-news .stream-more summary::after {
  content: "+";
  font-size: 0.9rem;
  line-height: 1;
}

.page-news .stream-more[open] summary::after {
  content: "–";
}

.page-news .stream-more summary:hover {
  color: var(--sand-050);
}

.page-news .stream-more ul {
  margin: 0.5rem 0 0;
  padding-left: 1rem;
  display: grid;
  gap: 0.35rem;
}

.page-news .stream-more li {
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--on-dark-dim);
}

.page-news .stream-more li::marker {
  color: var(--cyan-500);
}

/* 版本演进 */
.page-news .timeline-grid {
  display: grid;
  gap: clamp(22px, 3.4vw, 46px);
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
}

.page-news .timeline-intro h2 {
  font-size: clamp(1.4rem, 4.4vw, 2.1rem);
  line-height: 1.16;
  max-width: 18ch;
  margin-bottom: 0.9rem;
}

.page-news .timeline-intro > p {
  font-size: 0.92rem;
  line-height: 1.82;
  color: var(--on-dark);
  max-width: 40ch;
  margin-bottom: 1.3rem;
}

.page-news .timeline-track {
  display: grid;
  gap: clamp(18px, 3vw, 28px);
}

.page-news .timeline-media {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

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

.page-news .timeline-media .media-caption {
  font-size: 0.72rem;
  color: var(--mist-400);
  letter-spacing: 0.04em;
}

.page-news .timeline-list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 24px;
  position: relative;
  display: grid;
  gap: clamp(16px, 2.6vw, 24px);
}

.page-news .timeline-list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan-500), rgba(32, 215, 232, 0.12));
}

.page-news .timeline-node {
  position: relative;
  display: grid;
  gap: 0.32rem;
  padding-bottom: 0.2rem;
}

.page-news .timeline-node::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  border: 1px solid var(--cyan-500);
  background: var(--blue-900);
  transition: background-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-news .timeline-node:hover::before,
.page-news .timeline-node:focus-within::before {
  background: var(--cyan-500);
  box-shadow: 0 0 0 4px rgba(32, 215, 232, 0.16);
}

.page-news .timeline-tag {
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--coral-500);
}

.page-news .timeline-node h3 {
  font-size: clamp(1rem, 2.9vw, 1.16rem);
  color: var(--sand-050);
}

.page-news .timeline-node p {
  font-size: 0.85rem;
  line-height: 1.74;
  color: var(--on-dark-dim);
  max-width: 44ch;
}

/* 联系编辑 */
.page-news .subscribe-card {
  padding: clamp(22px, 4vw, 42px);
  display: grid;
  gap: clamp(20px, 3.2vw, 36px);
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
}

.page-news .card--light {
  color: var(--blue-900);
}

.page-news .subscribe-main {
  display: grid;
  gap: 0.8rem;
}

.page-news .subscribe-main .eyebrow {
  color: var(--blue-800);
  margin-bottom: 0;
}

.page-news .subscribe-main h2 {
  font-size: clamp(1.32rem, 4vw, 1.9rem);
  line-height: 1.18;
  color: var(--blue-900);
}

.page-news .subscribe-main p {
  font-size: 0.88rem;
  line-height: 1.85;
  color: var(--blue-800);
  max-width: 56ch;
}

.page-news .subscribe-main a {
  color: var(--blue-900);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: rgba(6, 26, 43, 0.32);
  text-underline-offset: 3px;
  overflow-wrap: anywhere;
}

.page-news .subscribe-main a:hover {
  text-decoration-color: var(--coral-500);
}

.page-news .subscribe-side {
  display: grid;
  gap: 1.1rem;
  align-content: start;
  border-top: 1px solid rgba(6, 26, 43, 0.16);
  padding-top: 1.1rem;
}

.page-news .subscribe-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.55rem;
}

.page-news .subscribe-links a {
  font-size: 0.85rem;
  color: var(--blue-900);
  text-decoration: none;
  border-bottom: 1px solid rgba(6, 26, 43, 0.22);
  padding-bottom: 2px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-news .subscribe-links a:hover {
  color: var(--coral-500);
  border-bottom-color: var(--coral-500);
}

.page-news .news-backtop {
  justify-self: start;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--blue-800);
  text-decoration: none;
  border: 1px solid rgba(6, 26, 43, 0.26);
  border-radius: 999px;
  padding: 0.42rem 0.85rem;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-news .news-backtop:hover {
  background: var(--blue-900);
  color: var(--sand-050);
}

/* 中等屏 */
@media (min-width: 720px) {
  .page-news .lead-side {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(18px, 3vw, 28px);
  }

  .page-news .side-story:last-child {
    border-bottom: 1px solid var(--line-soft);
  }

  .page-news .stream-feature {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: center;
  }

  .page-news .stream-feature--reverse {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.35fr);
  }

  .page-news .timeline-track {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: start;
  }

  .page-news .subscribe-card {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.9fr);
  }

  .page-news .subscribe-side {
    border-top: 0;
    border-left: 1px solid rgba(6, 26, 43, 0.16);
    padding-top: 0;
    padding-left: clamp(18px, 3vw, 28px);
  }
}

/* 桌面 */
@media (min-width: 960px) {
  .page-news .masthead-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: end;
  }

  .page-news .lead-grid {
    grid-template-columns: minmax(0, 1.62fr) minmax(0, 1fr);
    align-items: stretch;
  }

  .page-news .lead-side {
    grid-template-columns: minmax(0, 1fr);
    align-content: start;
  }

  .page-news .lead-story {
    min-height: 480px;
  }

  .page-news .stream-grid {
    grid-template-columns: minmax(0, 240px) minmax(0, 1fr);
    gap: clamp(36px, 5vw, 76px);
  }

  .page-news .stream-rail {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-news .filter-bar {
    flex-direction: column;
    align-items: flex-start;
  }

  .page-news .filter-btn {
    width: 100%;
    text-align: left;
  }

  .page-news .stream-item--offset {
    margin-left: clamp(0px, 3.4vw, 46px);
  }

  .page-news .stream-item {
    padding-block: clamp(22px, 2.6vw, 32px);
  }

  .page-news .stream-item--wide {
    padding-block: clamp(26px, 3.2vw, 40px);
  }

  .page-news .timeline-grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    gap: clamp(40px, 5.5vw, 84px);
  }

  .page-news .lead-story:hover > img {
    opacity: 0.66;
    transition: opacity 0.4s var(--ease);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-news * {
    transition: none !important;
  }
}