.page-news {
  --news-time-col: 96px;
  color: var(--text);
}

/* 状态条 */
.page-news .signal-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 6px 20px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  font-size: var(--fs-13);
  color: var(--muted);
}

.page-news .signal-bar .signal {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.page-news .signal-bar .meta-row {
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  letter-spacing: 0.04em;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

/* 首屏 */
.page-news .news-hero {
  position: relative;
  padding: 26px 0 52px;
  background:
    radial-gradient(115% 130% at 10% -10%, rgba(31, 169, 201, 0.22), transparent 60%),
    radial-gradient(80% 90% at 95% 0%, rgba(52, 226, 212, 0.13), transparent 58%);
}

.page-news .news-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: start;
}

.page-news .news-hero__kicker {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-news .news-hero h1 {
  margin: 0 0 16px;
  font-size: var(--fs-40);
  font-weight: 600;
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-news .news-hero__lead {
  margin: 0 0 20px;
  max-width: 46ch;
  font-size: var(--fs-17);
  line-height: 1.75;
  color: var(--muted);
}

.page-news .news-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin: 0 0 24px;
  padding: 14px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
  font-size: var(--fs-13);
  color: var(--muted);
}

.page-news .news-hero__facts .mono {
  font-family: var(--font-mono);
  font-size: var(--fs-21);
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
  margin-right: 4px;
}

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

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

.page-news .media-frame img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-l);
}

.page-news .media-frame__caption {
  margin-top: 10px;
  font-size: var(--fs-13);
  line-height: 1.7;
  color: var(--muted);
}

.page-news .news-hero__media img {
  border: 1px solid var(--line);
  box-shadow: 0 24px 60px -32px rgba(31, 169, 201, 0.6);
}

/* 左轨 + 主体 */
.page-news .news-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  padding: 36px 0 72px;
}

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

.page-news .rail__title {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-news .rail__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-news .rail__links {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: thin;
}

.page-news .rail__link {
  display: block;
  padding: 7px 12px;
  border-left: 2px solid transparent;
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
  font-size: var(--fs-15);
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.18s ease-out, background-color 0.18s ease-out, border-color 0.18s ease-out;
}

.page-news .rail__link:hover,
.page-news .rail__link:focus-visible {
  color: var(--text);
  background: var(--glass);
}

.page-news .rail__link[aria-current="true"] {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: var(--glass);
}

/* 标签药丸 */
.page-news .pill {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  letter-spacing: 0.04em;
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  background: transparent;
  transition: border-color 0.18s ease-out, color 0.18s ease-out, background-color 0.18s ease-out;
}

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

.page-news .pill--on {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(52, 226, 212, 0.1);
}

/* 章节 */
.page-news .news-section {
  padding: 36px 0 6px;
}

.page-news .news-section + .news-section {
  margin-top: 28px;
  border-top: 1px solid var(--line);
}

.page-news .section-head__title {
  font-size: var(--fs-28);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-news .news-section__lead {
  margin: 0 0 24px;
  max-width: 68ch;
  font-size: var(--fs-17);
  line-height: 1.75;
  color: var(--muted);
}

.page-news .news-section__tail {
  margin: 22px 0 0;
  max-width: 68ch;
  font-size: var(--fs-15);
  line-height: 1.75;
  color: var(--muted);
}

.page-news .news-section__tail a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(52, 226, 212, 0.4);
}

.page-news .news-media {
  margin: 0 0 8px;
}

.page-news .news-media--narrow {
  max-width: 840px;
}

/* 更新流 */
.page-news .news-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

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

.page-news .news-item__time {
  margin: 2px 0 0;
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  letter-spacing: 0.06em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.page-news .news-item__cat {
  margin: 0 0 8px;
}

.page-news .news-item__title {
  margin: 0 0 8px;
  font-size: var(--fs-21);
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-news .news-item__text {
  margin: 0;
  max-width: 62ch;
  font-size: var(--fs-17);
  line-height: 1.75;
  color: var(--muted);
}

/* 折叠说明 */
.page-news .fold {
  margin-top: 12px;
  padding-left: 12px;
  border-left: 2px solid var(--line);
}

.page-news .fold--standalone {
  margin-top: 20px;
}

.page-news .fold__head {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  letter-spacing: 0.04em;
  color: var(--cyan);
}

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

.page-news .fold__mark {
  display: inline-block;
  color: var(--cyan);
  transition: transform 0.26s ease-out;
}

.page-news .fold[open] .fold__mark {
  transform: rotate(45deg);
}

.page-news .fold__body {
  margin-top: 10px;
  max-width: 62ch;
  font-size: var(--fs-15);
  line-height: 1.75;
  color: var(--muted);
}

.page-news .fold__body p {
  margin: 0 0 8px;
}

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

/* 调整前后对照 */
.page-news .diff {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 26px;
}

.page-news .diff__col {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: var(--glass);
}

.page-news .diff__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  letter-spacing: 0.16em;
  color: var(--muted);
}

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

.page-news .diff__row {
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  gap: 10px;
  font-size: var(--fs-15);
  line-height: 1.7;
  color: var(--text);
}

.page-news .diff__mark {
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  line-height: 1.9;
}

.page-news .diff__mark--drop {
  color: var(--amber);
}

.page-news .diff__mark--add {
  color: var(--green);
}

.page-news .news-note {
  margin-top: 24px;
  padding-top: 18px;
  font-size: var(--fs-15);
  line-height: 1.75;
  color: var(--muted);
}

.page-news .news-note p {
  margin: 0;
  max-width: 68ch;
}

/* 专题预告 */
.page-news .preview-list {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-news .preview-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.page-news .preview-item:last-child {
  border-bottom: 1px solid var(--line);
}

.page-news .preview-item__when {
  margin: 3px 0 0;
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  letter-spacing: 0.06em;
  color: var(--amber);
  white-space: nowrap;
}

.page-news .preview-item__title {
  margin: 0 0 6px;
  font-size: var(--fs-17);
  font-weight: 600;
  color: var(--text);
}

.page-news .preview-item__desc {
  margin: 0;
  max-width: 62ch;
  font-size: var(--fs-15);
  line-height: 1.75;
  color: var(--muted);
}

/* 合作流程 */
.page-news .coop__steps {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-news .coop__step {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 6px 14px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

.page-news .coop__num {
  grid-row: span 2;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-news .coop__name {
  margin: 0;
  font-size: var(--fs-17);
  font-weight: 600;
  color: var(--text);
}

.page-news .coop__desc {
  grid-column: 2;
  margin: 0;
  max-width: 60ch;
  font-size: var(--fs-15);
  line-height: 1.75;
  color: var(--muted);
}

/* 回看入口 */
.page-news .news-links {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 20px;
}

.page-news .news-link {
  display: block;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: var(--glass);
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.18s ease-out, background-color 0.18s ease-out;
}

.page-news .news-link:hover,
.page-news .news-link:focus-visible {
  border-color: var(--cyan);
  background: var(--glass-strong);
}

.page-news .news-link__title {
  display: block;
  margin-bottom: 6px;
  font-size: var(--fs-15);
  font-weight: 600;
}

.page-news .news-link__desc {
  display: block;
  font-size: var(--fs-13);
  line-height: 1.7;
  color: var(--muted);
}

/* 平板及以上 */
@media (min-width: 720px) {
  .page-news .news-item {
    grid-template-columns: var(--news-time-col) minmax(0, 1fr);
    gap: 24px;
    padding: 24px 0;
  }

  .page-news .preview-item {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 24px;
  }

  .page-news .news-links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 800px) {
  .page-news .diff {
    grid-template-columns: 1fr 1fr;
    gap: 0;
    border: 1px solid var(--line);
    border-radius: var(--radius-l);
    overflow: hidden;
    background: rgba(233, 242, 248, 0.04);
  }

  .page-news .diff__col {
    padding: 22px 26px;
    border: 0;
    border-radius: 0;
    background: transparent;
  }

  .page-news .diff__col--after {
    border-left: 1px solid var(--line);
    background: rgba(52, 226, 212, 0.05);
  }

  .page-news .coop__steps {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 26px;
    border-top: 1px solid var(--line);
  }

  .page-news .coop__step {
    border-top: 0;
    padding-top: 20px;
  }
}

/* 桌面端左轨常驻 */
@media (min-width: 940px) {
  .page-news .news-hero {
    padding: 34px 0 64px;
  }

  .page-news .news-hero__grid {
    grid-template-columns: 5fr 7fr;
    gap: 44px;
  }

  .page-news .news-hero h1 {
    font-size: var(--fs-56);
  }

  .page-news .news-shell {
    grid-template-columns: var(--rail-w) minmax(0, 1fr);
    gap: 48px;
    padding: 48px 0 88px;
  }

  .page-news .rail {
    position: sticky;
    top: calc(var(--header-h) + 18px);
    align-self: start;
    gap: 12px;
  }

  .page-news .rail__links {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-news .rail__chips {
    gap: 6px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-news .rail__link,
  .page-news .pill,
  .page-news .fold__mark,
  .page-news .news-link {
    transition: none;
  }
}