.page-news {
  --news-radius: clamp(18px, 2vw, 26px);
  --news-pad: clamp(18px, 2.4vw, 30px);
  --news-gap: clamp(16px, 2vw, 24px);
  background: var(--fog-050);
  color: var(--ink-900);
}

/* ---------- 首屏 ---------- */
.page-news .news-hero {
  position: relative;
  padding: clamp(22px, 4vw, 46px) 0 clamp(34px, 6vw, 76px);
  background: linear-gradient(168deg, var(--fog-100) 0%, var(--fog-050) 56%, var(--fog-050) 100%);
  border-bottom: 1px solid var(--stone-300);
}

.page-news .hero-rule {
  height: 9px;
  margin: clamp(16px, 2.4vw, 28px) 0 clamp(20px, 3vw, 34px);
  background-image: repeating-linear-gradient(90deg, var(--copper-600) 0 1px, transparent 1px 26px);
  opacity: .5;
  -webkit-mask-image: linear-gradient(90deg, #000 0%, #000 58%, transparent 100%);
  mask-image: linear-gradient(90deg, #000 0%, #000 58%, transparent 100%);
}

.page-news h1 {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(31px, 6.2vw, 78px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0;
  max-width: 18ch;
}

.page-news .news-hero .lead {
  margin: clamp(18px, 2.6vw, 30px) 0 0;
  max-width: 64ch;
  font-size: clamp(15px, 1.8vw, 17.5px);
  line-height: 1.8;
  color: var(--ink-600);
}

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

/* ---------- 通用区块标题 ---------- */
.page-news .section-head h2 {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(24px, 3.4vw, 40px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 8px 0 0;
  max-width: 26ch;
}

.page-news .section-head .lead {
  margin: 14px 0 0;
  max-width: 58ch;
  color: var(--ink-600);
  line-height: 1.8;
}

/* ---------- 置顶版本说明 ---------- */
.page-news .news-version {
  position: relative;
  overflow: hidden;
  padding: clamp(38px, 6vw, 82px) 0;
  background: var(--mineral-700);
  color: #fff;
}

.page-news .news-version::before {
  content: "";
  position: absolute;
  right: -16%;
  bottom: -48%;
  width: min(640px, 88vw);
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 50%, rgba(42, 124, 158, .58), transparent 68%);
  pointer-events: none;
}

.page-news .version-panel {
  position: relative;
  display: grid;
  gap: clamp(20px, 3vw, 40px);
  align-items: center;
}

.page-news .version-visual {
  position: relative;
  border-radius: var(--news-radius);
  overflow: hidden;
  background: linear-gradient(150deg, rgba(191, 217, 228, .3), rgba(18, 63, 85, .5));
}

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

.page-news .version-badge {
  position: absolute;
  left: clamp(14px, 2vw, 22px);
  bottom: clamp(14px, 2vw, 22px);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  padding: 7px 15px;
  border-radius: var(--radius-pill);
  background: var(--warm-500);
  color: #fff;
}

.page-news .version-body .eyebrow-light {
  color: var(--copper-100);
  margin: 0;
}

.page-news .version-body h2 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(23px, 3.6vw, 41px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 10px 0 0;
  color: #fff;
}

.page-news .version-body p {
  margin: 16px 0 0;
  max-width: 60ch;
  font-size: 15.5px;
  line-height: 1.82;
  color: rgba(245, 247, 248, .82);
}

.page-news .version-points {
  list-style: none;
  margin: clamp(20px, 2.6vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 13px;
}

.page-news .version-points li {
  position: relative;
  padding-left: 30px;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(245, 247, 248, .92);
}

.page-news .version-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--copper-600);
}

/* ---------- 栏目分类 ---------- */
.page-news .news-cats {
  padding: clamp(38px, 6vw, 80px) 0;
}

.page-news .cat-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--news-gap);
  margin-top: clamp(22px, 3vw, 38px);
}

.page-news .cat-card {
  position: relative;
  padding: clamp(20px, 2.4vw, 28px);
  border-radius: var(--news-radius);
  background: var(--fog-100);
  border: 1px solid var(--stone-300);
  overflow: hidden;
  transition: border-color .25s ease, background .25s ease;
}

.page-news .cat-card::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--copper-600), transparent 82%);
}

.page-news .cat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--copper-600);
  font-variant-numeric: tabular-nums;
}

.page-news .cat-name {
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 10px 0 0;
  color: var(--ink-900);
}

.page-news .cat-desc {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--ink-600);
}

/* ---------- 条目时间轴 ---------- */
.page-news .news-feed {
  padding: clamp(38px, 6vw, 80px) 0;
  background: linear-gradient(180deg, var(--fog-050) 0%, var(--fog-100) 26%, var(--fog-100) 74%, var(--fog-050) 100%);
}

.page-news .timeline {
  position: relative;
  margin-top: clamp(24px, 3.6vw, 46px);
  padding-left: 32px;
}

.page-news .timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 16px;
  bottom: 16px;
  width: 1px;
  background: linear-gradient(180deg, var(--copper-600) 0%, var(--stone-300) 14%, var(--stone-300) 86%, transparent 100%);
}

.page-news .tl-item {
  position: relative;
}

.page-news .tl-item::before {
  content: "";
  position: absolute;
  left: -31px;
  top: 26px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--fog-050);
  border: 2px solid var(--copper-600);
  transition: background .25s ease;
}

.page-news .tl-item + .tl-item {
  margin-top: clamp(16px, 2.2vw, 24px);
}

.page-news .tl-card {
  position: relative;
  background: #fff;
  border: 1px solid var(--stone-300);
  border-radius: var(--news-radius);
  padding: var(--news-pad);
  overflow: hidden;
  transition: transform .26s ease, box-shadow .26s ease, border-color .26s ease;
}

.page-news .tl-card::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--warm-500);
  transform: scaleY(0);
  transform-origin: 50% 0;
  transition: transform .3s ease;
}

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

.page-news .tl-tag {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background: var(--fog-100);
  border: 1px solid var(--stone-300);
  white-space: nowrap;
}

.page-news .tl-tag--version {
  color: var(--warm-700);
}

.page-news .tl-tag--method {
  color: var(--mineral-500);
}

.page-news .tl-tag--field {
  color: var(--ink-600);
}

.page-news .tl-tag--revise {
  color: var(--copper-600);
}

.page-news .tl-time {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .02em;
  font-variant-numeric: tabular-nums;
  color: var(--ink-600);
}

.page-news .tl-title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(17px, 2.2vw, 21px);
  line-height: 1.44;
  letter-spacing: -0.005em;
  margin: 12px 0 0;
  color: var(--ink-900);
}

.page-news .tl-summary {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--ink-600);
  max-width: 62ch;
}

.page-news .tl-card--media {
  display: grid;
  gap: 16px;
}

.page-news .tl-media {
  border-radius: calc(var(--news-radius) - 8px);
  overflow: hidden;
  background: linear-gradient(140deg, var(--fog-100), var(--mineral-200));
}

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

.page-news .tl-body {
  min-width: 0;
}

/* ---------- 专题系列 ---------- */
.page-news .news-series {
  padding: clamp(38px, 6vw, 80px) 0;
}

.page-news .series-list {
  display: grid;
  gap: var(--news-gap);
  margin-top: clamp(22px, 3vw, 38px);
}

.page-news .series-item {
  display: grid;
  gap: 10px;
  padding: clamp(20px, 2.6vw, 30px);
  border-radius: var(--news-radius);
  border: 1px solid var(--stone-300);
  background: var(--fog-050);
  border-left: 3px solid var(--copper-600);
}

.page-news .series-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--copper-600);
  font-variant-numeric: tabular-nums;
}

.page-news .series-body h3 {
  font-family: var(--font-serif);
  font-size: clamp(19px, 2.4vw, 25px);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--ink-900);
}

.page-news .series-body p {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-600);
  max-width: 62ch;
}

.page-news .series-scope {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .02em;
  color: var(--warm-700);
}

/* ---------- 更新节奏 ---------- */
.page-news .news-cadence {
  padding: clamp(38px, 6vw, 80px) 0;
  background: var(--fog-100);
  border-top: 1px solid var(--stone-300);
  border-bottom: 1px solid var(--stone-300);
}

.page-news .cadence-grid {
  display: grid;
  gap: clamp(24px, 3.4vw, 48px);
}

.page-news .cadence-intro h2 {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(23px, 3.2vw, 38px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 8px 0 0;
  max-width: 22ch;
}

.page-news .cadence-intro p {
  margin: 16px 0 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.82;
  color: var(--ink-600);
}

.page-news .cadence-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--stone-300);
  border: 1px solid var(--stone-300);
  border-radius: var(--news-radius);
  overflow: hidden;
}

.page-news .cadence-list li {
  background: var(--fog-050);
  padding: clamp(16px, 2vw, 22px);
  display: grid;
  gap: 8px;
}

.page-news .cadence-k {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--warm-700);
}

.page-news .cadence-v {
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--ink-600);
}

/* ---------- 结尾入口 ---------- */
.page-news .news-cta {
  position: relative;
  overflow: hidden;
  padding: clamp(38px, 6vw, 82px) 0;
  background: var(--mineral-700);
  color: #fff;
}

.page-news .news-cta::before {
  content: "";
  position: absolute;
  left: -12%;
  top: -60%;
  width: min(560px, 80vw);
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 50%, rgba(168, 123, 60, .34), transparent 66%);
  pointer-events: none;
}

.page-news .cta-inner {
  position: relative;
  max-width: 62ch;
}

.page-news .cta-inner h2 {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(23px, 3.4vw, 40px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0;
  color: #fff;
}

.page-news .cta-inner p {
  margin: 16px 0 0;
  font-size: 15.5px;
  line-height: 1.82;
  color: rgba(245, 247, 248, .82);
}

.page-news .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-news .cta-inner .btn-ghost {
  color: #fff;
  border-color: rgba(245, 247, 248, .42);
}

/* ---------- 回到顶部 ---------- */
.page-news .back-top {
  position: fixed;
  right: clamp(14px, 3vw, 28px);
  bottom: clamp(78px, 12vw, 104px);
  z-index: 30;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  padding: 9px 16px;
  border-radius: var(--radius-pill);
  background: var(--mineral-700);
  color: #fff;
  text-decoration: none;
  box-shadow: var(--shadow-soft);
  transition: background .22s ease, transform .22s ease;
}

.page-news .back-top:hover,
.page-news .back-top:focus-visible {
  background: var(--mineral-500);
  transform: translateY(-2px);
}

/* ---------- 悬停细节 ---------- */
@media (hover: hover) {
  .page-news .cat-card:hover {
    background: #fff;
    border-color: var(--mineral-200);
  }

  .page-news .tl-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-soft);
    border-color: var(--mineral-200);
  }

  .page-news .tl-card:hover::after,
  .page-news .tl-card:focus-within::after {
    transform: scaleY(1);
  }

  .page-news .tl-item:hover::before {
    background: var(--warm-500);
  }
}

/* ---------- 窄屏适配 ---------- */
@media (max-width: 480px) {
  .page-news .timeline {
    padding-left: 24px;
  }

  .page-news .timeline::before {
    left: 5px;
  }

  .page-news .tl-item::before {
    left: -23px;
    top: 22px;
    width: 11px;
    height: 11px;
  }

  .page-news .back-top {
    right: 12px;
    bottom: 84px;
    padding: 8px 13px;
    font-size: 11px;
  }
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 640px) {
  .page-news .cat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-news .series-item {
    grid-template-columns: auto minmax(0, 1fr);
    gap: 0 clamp(20px, 3vw, 34px);
    align-items: start;
  }

  .page-news .series-num {
    padding-top: 5px;
  }

  .page-news .series-body {
    grid-column: 2;
  }
}

@media (min-width: 760px) {
  .page-news .timeline {
    padding-left: 42px;
  }

  .page-news .timeline::before {
    left: 10px;
  }

  .page-news .tl-item::before {
    left: -39px;
  }

  .page-news .tl-card--media {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    gap: clamp(18px, 2.4vw, 30px);
    align-items: center;
  }

  .page-news .tl-card--media .tl-media {
    grid-column: 1;
    grid-row: 1;
  }

  .page-news .tl-card--media .tl-body {
    grid-column: 2;
    grid-row: 1;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 880px) {
  .page-news .version-panel {
    grid-template-columns: 5fr 7fr;
  }

  .page-news .cadence-grid {
    grid-template-columns: 5fr 7fr;
    align-items: start;
  }
}

@media (min-width: 1040px) {
  .page-news .cat-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 降低动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-news .cat-card,
  .page-news .tl-card,
  .page-news .tl-item::before,
  .page-news .back-top {
    transition: none;
  }

  .page-news .tl-card:hover {
    transform: none;
  }

  .page-news .back-top:hover,
  .page-news .back-top:focus-visible {
    transform: none;
  }
}