.page-news {
  --news-axis: 248px;
  --news-radius: 18px;
}

.page-news .news-hero {
  position: relative;
  padding: clamp(26px, 5vw, 58px) 0 clamp(22px, 4vw, 44px);
  background:
    radial-gradient(120% 84% at 84% 2%, rgba(61, 245, 212, .10), transparent 58%),
    radial-gradient(96% 72% at 4% 26%, rgba(91, 140, 255, .10), transparent 62%);
}

.page-news .hero-grid {
  display: grid;
  gap: clamp(24px, 4vw, 46px);
  margin-top: clamp(18px, 3vw, 30px);
}

.page-news .hero-copy .display-title {
  max-width: 18ch;
}

.page-news .hero-copy .lede {
  max-width: 62ch;
  margin-top: 16px;
}

.page-news .hero-copy .btn-row {
  margin-top: 24px;
}

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

.page-news .hero-media img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-news .news-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 52px);
  padding-top: clamp(30px, 5vw, 58px);
  padding-bottom: clamp(48px, 7vw, 96px);
}

/* 左侧轴：章节导航与快速信息 */
.page-news .news-axis {
  min-width: 0;
}

.page-news .axis-label {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--gray);
}

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

.page-news .axis-nav .chapter-link {
  white-space: nowrap;
  flex: 0 0 auto;
}

.page-news .axis-note {
  margin-top: 18px;
  padding: 18px 16px;
  border-radius: var(--news-radius);
  background: linear-gradient(165deg, rgba(28, 51, 80, .60), rgba(14, 59, 58, .40));
  border: 1px solid var(--line-soft);
}

.page-news .axis-num {
  font-size: clamp(30px, 6vw, 42px);
}

.page-news .axis-note p {
  margin: 8px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--gray);
}

/* 右侧连续画布 */
.page-news .news-flow {
  min-width: 0;
}

.page-news .news-block {
  padding: clamp(30px, 4.6vw, 52px) 0;
  border-top: 1px solid var(--line-soft);
}

.page-news .news-block:first-child {
  padding-top: clamp(4px, 1.5vw, 12px);
  border-top: 0;
}

.page-news .block-head {
  display: grid;
  gap: 8px;
}

.page-news .news-block .media-frame {
  margin-top: 24px;
}

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

.page-news .block-copy {
  margin: 20px 0 0;
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--gray);
}

.page-news .block-copy strong {
  font-family: var(--font-mono);
  font-size: 1.18em;
  color: var(--gold);
}

/* 动态列表 */
.page-news .news-list {
  position: relative;
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

.page-news .news-list::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, rgba(61, 245, 212, .75), rgba(61, 245, 212, .06));
}

.page-news .news-item {
  position: relative;
  padding: 16px 16px 18px 28px;
  border-radius: var(--news-radius);
  background: linear-gradient(150deg, rgba(28, 51, 80, .42), rgba(10, 20, 40, .58));
  border: 1px solid var(--line-soft);
  transition: border-color .3s var(--ease), background .3s var(--ease);
}

.page-news .news-item:hover {
  border-color: rgba(61, 245, 212, .26);
}

.page-news .news-item::before {
  content: "";
  position: absolute;
  left: 1px;
  top: 24px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink-800);
  border: 2px solid var(--teal);
  box-shadow: 0 0 0 4px rgba(61, 245, 212, .10);
}

.page-news .news-item-top {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.page-news .news-time {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--gray);
}

.page-news .news-item-title {
  margin: 12px 0 0;
  font-size: clamp(17px, 1.5vw, 20px);
  line-height: 1.5;
  color: var(--mist);
}

.page-news .news-item-sum {
  margin: 10px 0 0;
  font-family: var(--font-body);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--gray);
}

.page-news .news-item-more {
  margin-top: 12px;
}

.page-news .news-item-more summary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  list-style: none;
  cursor: pointer;
  font-size: 14px;
  letter-spacing: .04em;
  color: var(--teal);
}

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

.page-news .news-item-more summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 15px;
}

.page-news .news-item-more[open] summary::after {
  content: "\2013";
}

.page-news .news-points {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 7px;
}

.page-news .news-points li {
  position: relative;
  padding-left: 16px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--gray);
}

.page-news .news-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 8px;
  height: 1px;
  background: var(--teal);
}

.page-news .news-link {
  display: inline-block;
  margin-top: 12px;
  font-size: 14.5px;
  color: var(--volt);
  text-decoration: none;
  border-bottom: 1px solid rgba(91, 140, 255, .38);
}

/* 归档进度 */
.page-news .archive-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 22px;
}

.page-news .stat {
  padding: 18px 16px;
  border-radius: var(--news-radius);
  background: linear-gradient(160deg, rgba(28, 51, 80, .55), rgba(14, 59, 58, .38));
  border: 1px solid var(--line-soft);
}

.page-news .stat-num {
  font-size: clamp(26px, 4.4vw, 40px);
}

.page-news .stat-caption {
  margin: 8px 0 0;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--gray);
}

.page-news .archive-steps {
  counter-reset: archive-step;
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-news .archive-steps li {
  position: relative;
  padding: 18px 18px 18px 60px;
  border-radius: var(--news-radius);
  background: rgba(28, 51, 80, .34);
  border: 1px solid var(--line-soft);
}

.page-news .archive-steps li::before {
  counter-increment: archive-step;
  content: "0" counter(archive-step);
  position: absolute;
  left: 18px;
  top: 18px;
  font-family: var(--font-mono);
  font-size: 19px;
  color: var(--teal);
}

.page-news .archive-steps strong {
  display: block;
  margin-bottom: 6px;
  font-size: 16px;
  color: var(--mist);
}

.page-news .archive-steps span {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--gray);
}

/* 变更对照带 */
.page-news .change-strip {
  display: flex;
  gap: 14px;
  margin-top: 22px;
  padding-bottom: 16px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-news .change-strip::-webkit-scrollbar {
  height: 6px;
}

.page-news .change-strip::-webkit-scrollbar-thumb {
  background: rgba(61, 245, 212, .38);
  border-radius: var(--pill);
}

.page-news .change-card {
  flex: 0 0 clamp(230px, 74vw, 296px);
  scroll-snap-align: start;
  padding: 20px 18px;
  border-radius: var(--news-radius);
  background: linear-gradient(170deg, rgba(14, 59, 58, .72), rgba(28, 51, 80, .42));
  border: 1px solid var(--line-soft);
  border-left: 2px solid rgba(196, 71, 58, .85);
}

.page-news .change-kind {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--brick);
}

.page-news .change-card h3 {
  margin: 10px 0 8px;
  font-size: 17px;
  color: var(--mist);
}

.page-news .change-card p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.8;
  color: var(--gray);
}

/* 版本迭代 */
.page-news .release-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-news .release-list li {
  padding: 18px 20px;
  border-radius: var(--news-radius);
  background: rgba(28, 51, 80, .30);
  border: 1px solid var(--line-soft);
  border-left: 2px solid var(--teal);
}

.page-news .release-key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--gold);
}

.page-news .release-list h3 {
  margin: 8px 0 6px;
  font-size: 17px;
  line-height: 1.45;
  color: var(--mist);
}

.page-news .release-list p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.8;
  color: var(--gray);
}

/* 专题系列 */
.page-news .topic-grid {
  display: grid;
  gap: 14px;
  margin-top: 22px;
}

.page-news .topic-card {
  display: block;
  padding: 22px 20px 20px;
  border-radius: var(--news-radius);
  background: linear-gradient(160deg, rgba(28, 51, 80, .48), rgba(6, 11, 22, .62));
  border: 1px solid var(--line-soft);
  text-decoration: none;
  color: inherit;
  transition: border-color .3s var(--ease), transform .3s var(--ease);
}

.page-news .topic-card:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}

.page-news .topic-index {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--teal);
}

.page-news .topic-card h3 {
  margin: 10px 0 8px;
  font-size: 19px;
  color: var(--mist);
}

.page-news .topic-card p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--gray);
}

.page-news .topic-go {
  display: inline-block;
  margin-top: 14px;
  font-size: 14px;
  color: var(--volt);
}

/* 订阅与勘误 */
.page-news .sub-grid {
  display: grid;
  gap: 14px;
  margin-top: 22px;
}

.page-news .sub-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 22px 20px;
  border-radius: var(--news-radius);
  background: linear-gradient(165deg, rgba(14, 59, 58, .52), rgba(10, 20, 40, .74));
  border: 1px solid var(--line-soft);
}

.page-news .sub-card h3 {
  margin: 0 0 10px;
  font-size: 18px;
  color: var(--mist);
}

.page-news .sub-card p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--gray);
}

.page-news .sub-card strong {
  font-family: var(--font-mono);
  font-size: 1.05em;
  color: var(--gold);
  word-break: break-all;
}

.page-news .sub-card .btn {
  margin-top: 16px;
}

.page-news .sub-note {
  margin-top: 10px !important;
  font-size: 13.5px !important;
  color: rgba(143, 163, 191, .82) !important;
}

/* 平板及以上 */
@media (min-width: 720px) {
  .page-news .archive-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

  .page-news .sub-card--contact {
    grid-column: 1 / -1;
  }

  .page-news .release-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* 桌面：左右分屏，左轴粘性 */
@media (min-width: 900px) {
  .page-news .hero-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.02fr);
    align-items: center;
  }

  .page-news .hero-copy .display-title {
    max-width: 16ch;
  }

  .page-news .news-item {
    padding: 18px 22px 20px 32px;
  }
}

@media (min-width: 1024px) {
  .page-news .news-body {
    grid-template-columns: var(--news-axis) minmax(0, 1fr);
    align-items: start;
  }

  .page-news .news-axis {
    position: sticky;
    top: calc(var(--header-h) + 26px);
  }

  .page-news .axis-nav {
    flex-direction: column;
    gap: 4px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-news .axis-nav .chapter-link {
    white-space: normal;
  }
}

@media (min-width: 1180px) {
  .page-news .news-body {
    grid-template-columns: 264px minmax(0, 1fr);
    gap: clamp(36px, 4vw, 68px);
  }
}