/* ==========================================================
   页面作用域：资讯中心 /news/
   仅在本页生效，不覆盖共享头部与页脚
   ========================================================== */

.page-news {
  --news-side: 300px;
  --news-pad: clamp(40px, 6vw, 84px);
  padding-bottom: clamp(56px, 9vw, 132px);
  overflow-x: clip;
}

.page-news .section {
  padding: var(--news-pad) 0;
  border-top: 1px solid var(--line);
}

/* ---------- 面包屑 ---------- */
.page-news .breadcrumb {
  padding-top: clamp(20px, 3vw, 32px);
  font-family: var(--mono);
  font-size: var(--step-12);
  letter-spacing: 0.06em;
  color: var(--grey);
}

.page-news .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-news .breadcrumb li {
  display: flex;
  align-items: center;
}

.page-news .breadcrumb li + li::before {
  content: "/";
  margin: 0 10px;
  color: var(--line);
}

.page-news .breadcrumb a {
  color: var(--grey);
  text-decoration: none;
  transition: color 0.18s var(--ease);
}

.page-news .breadcrumb a:hover,
.page-news .breadcrumb a:focus-visible {
  color: var(--blue);
}

.page-news .breadcrumb [aria-current="page"] {
  color: var(--white);
}

/* ---------- 01 首屏 ---------- */
.page-news .news-lead {
  padding-top: clamp(36px, 6vw, 76px);
}

.page-news .eyebrow {
  font-family: var(--mono);
  font-size: var(--step-12);
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--green);
  margin: 0 0 20px;
}

.page-news .news-lead h1 {
  font-family: var(--sans);
  font-weight: 900;
  font-size: clamp(32px, 5.6vw, 68px);
  line-height: 1.1;
  letter-spacing: -0.035em;
  color: var(--white);
  margin: 0 0 clamp(20px, 3vw, 30px);
  max-width: 16ch;
}

.page-news .lede {
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.85;
  color: var(--ink-soft);
  max-width: 40em;
  margin: 0 0 clamp(28px, 4vw, 44px);
}

.page-news .lead-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 20px clamp(28px, 5vw, 72px);
  margin: 0;
  padding-top: clamp(20px, 3vw, 28px);
  border-top: 1px solid var(--line);
}

.page-news .lead-meta dt {
  font-family: var(--mono);
  font-size: var(--step-12);
  letter-spacing: 0.1em;
  color: var(--grey);
  margin: 0 0 8px;
}

.page-news .lead-meta dd {
  margin: 0;
  font-family: var(--mono);
  font-size: clamp(15px, 1.6vw, 20px);
  color: var(--white);
  letter-spacing: 0.02em;
}

/* ---------- 02 标签 ---------- */
.page-news .section-head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(24px, 3vw, 36px);
}

.page-news .section-num {
  font-family: var(--mono);
  font-size: var(--step-12);
  letter-spacing: 0.24em;
  color: var(--green);
}

.page-news .section-title {
  font-family: var(--sans);
  font-weight: 800;
  font-size: clamp(21px, 2.6vw, 30px);
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--white);
  margin: 0;
}

.page-news .section-note {
  font-size: var(--step-14);
  line-height: 1.75;
  color: var(--grey);
  margin: 0;
  max-width: 56ch;
}

.page-news .tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-news .tag-btn {
  appearance: none;
  font-family: var(--sans);
  font-size: var(--step-12);
  letter-spacing: 0.1em;
  color: var(--grey);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 0;
  padding: 9px 18px;
  cursor: pointer;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-news .tag-btn:hover {
  color: var(--white);
  border-color: var(--blue);
}

.page-news .tag-btn:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 2px;
}

.page-news .tag-btn[aria-pressed="true"] {
  color: var(--white);
  border-color: var(--green);
  background: rgba(23, 226, 127, 0.1);
}

/* ---------- 03 更新流 ---------- */
.page-news .news-stream .caliber-bar {
  margin-bottom: clamp(24px, 3vw, 36px);
  line-height: 1.7;
}

.page-news .news-stream .caliber-bar .mono {
  color: var(--green);
  margin-right: 10px;
  letter-spacing: 0.12em;
}

.page-news .update-layout {
  display: grid;
  gap: clamp(28px, 4vw, 44px);
}

.page-news .update-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-news .update-row {
  position: relative;
  display: grid;
  gap: 10px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
  transition: padding-left 0.22s var(--ease);
}

.page-news .update-row::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  bottom: 18px;
  width: 2px;
  background: var(--green);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform 0.24s var(--ease);
}

.page-news .update-row:hover::before,
.page-news .update-row:focus-within::before {
  transform: scaleY(1);
}

.page-news .update-index {
  font-family: var(--mono);
  font-size: clamp(28px, 4.4vw, 44px);
  font-weight: 300;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--grey);
  opacity: 0.4;
  transition: color 0.22s var(--ease), opacity 0.22s var(--ease);
}

.page-news .update-row:hover .update-index {
  color: var(--green);
  opacity: 1;
}

.page-news .update-kicker {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 10px;
  font-size: var(--step-12);
  color: var(--grey);
  letter-spacing: 0.06em;
}

.page-news .update-kicker .mono {
  font-family: var(--mono);
}

.page-news .update-title {
  font-family: var(--sans);
  font-weight: 700;
  font-size: clamp(16px, 1.9vw, 21px);
  line-height: 1.5;
  letter-spacing: -0.01em;
  color: var(--white);
  margin: 0 0 10px;
}

.page-news .update-desc {
  font-size: var(--step-14);
  line-height: 1.78;
  color: var(--ink-soft);
  margin: 0;
  max-width: 58ch;
}

.page-news .update-aside {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-news .aside-media {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--carbon-2);
  overflow: hidden;
}

.page-news .aside-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
  filter: saturate(0.85) contrast(1.05);
}

.page-news .aside-note {
  font-family: var(--mono);
  font-size: var(--step-12);
  line-height: 1.75;
  letter-spacing: 0.04em;
  color: var(--grey);
  margin: 0;
  padding-left: 12px;
  border-left: 2px solid var(--blue);
}

/* ---------- 04 专题 ---------- */
.page-news .topic-hero {
  margin: 0 0 clamp(28px, 4vw, 48px);
  position: relative;
  border: 1px solid var(--line);
  background: var(--carbon-2);
  overflow: hidden;
}

.page-news .topic-hero img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 8 / 5;
  filter: saturate(0.8) contrast(1.06) brightness(0.92);
}

.page-news .topic-hero figcaption {
  font-family: var(--mono);
  font-size: var(--step-12);
  letter-spacing: 0.05em;
  color: var(--grey);
  padding: 12px 16px;
  border-top: 1px solid var(--line);
}

.page-news .topics {
  display: grid;
  gap: clamp(22px, 3vw, 32px);
}

.page-news .topic {
  display: grid;
  align-content: start;
  gap: 12px;
  padding: clamp(22px, 3vw, 32px);
  background: var(--carbon-2);
  border: 1px solid var(--line);
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-news .topic:hover {
  border-color: rgba(23, 226, 127, 0.5);
  transform: translateY(-2px);
}

.page-news .topic--lead {
  border-left: 2px solid var(--blue);
}

.page-news .topic-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 16px;
  margin: 0;
  font-family: var(--mono);
  font-size: var(--step-12);
  color: var(--grey);
  letter-spacing: 0.08em;
}

.page-news .topic-key {
  color: var(--green);
}

.page-news .topic-count {
  color: var(--grey);
}

.page-news .topic-title {
  font-family: var(--sans);
  font-weight: 300;
  font-size: clamp(26px, 4vw, 44px);
  line-height: 1.16;
  letter-spacing: -0.03em;
  color: var(--white);
  margin: 0;
}

.page-news .topic-desc {
  font-size: var(--step-14);
  line-height: 1.8;
  color: var(--ink-soft);
  margin: 0;
  max-width: 46ch;
}

.page-news .topic-tail {
  font-family: var(--mono);
  font-size: var(--step-12);
  color: var(--mist);
  letter-spacing: 0.05em;
  margin: 4px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.page-news .topic--media {
  padding: 0;
  gap: 0;
}

.page-news .topic-media {
  margin: 0;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-news .topic-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
  filter: saturate(0.78) contrast(1.05) brightness(0.9);
}

.page-news .topic-text {
  display: grid;
  gap: 12px;
  padding: clamp(22px, 3vw, 32px);
}

/* ---------- 05 版本迭代 ---------- */
.page-news .version-banner {
  margin: 0 0 clamp(28px, 4vw, 44px);
  border: 1px solid var(--line);
  background: var(--carbon-2);
  overflow: hidden;
}

.page-news .version-banner img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 8 / 5;
  filter: saturate(0.6) contrast(1.08) brightness(0.86);
}

.page-news .version-banner figcaption {
  font-family: var(--mono);
  font-size: var(--step-12);
  letter-spacing: 0.05em;
  color: var(--grey);
  padding: 12px 16px;
  border-top: 1px solid var(--line);
}

.page-news .version-track {
  list-style: none;
  margin: 0;
  padding: 0 0 0 30px;
  position: relative;
}

.page-news .version-track::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--line);
}

.page-news .version-node {
  position: relative;
  padding: 0 0 30px;
  display: grid;
  gap: 8px;
}

.page-news .version-node:last-child {
  padding-bottom: 0;
}

.page-news .version-dot {
  position: absolute;
  left: -30px;
  top: 5px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  border: 1px solid var(--green);
  background: var(--carbon);
}

.page-news .version-node:last-child .version-dot {
  background: var(--green);
  box-shadow: 0 0 0 4px rgba(23, 226, 127, 0.16);
}

.page-news .version-tag {
  font-family: var(--mono);
  font-size: var(--step-14);
  letter-spacing: 0.1em;
  color: var(--white);
  margin: 0;
}

.page-news .version-text {
  font-size: var(--step-14);
  line-height: 1.78;
  color: var(--ink-soft);
  margin: 0;
  max-width: 44ch;
}

/* ---------- 06 更新节奏 ---------- */
.page-news .news-rhythm .caliber-bar {
  margin-bottom: clamp(24px, 3vw, 36px);
  line-height: 1.7;
}

.page-news .news-rhythm .caliber-bar .mono {
  color: var(--green);
  margin-right: 10px;
  letter-spacing: 0.12em;
}

.page-news .rhythm-grid {
  display: grid;
  gap: clamp(28px, 4vw, 44px);
}

.page-news .prose p {
  font-size: var(--step-16);
  line-height: 1.85;
  color: var(--ink-soft);
  margin: 0 0 18px;
  max-width: 38em;
}

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

.page-news .rhythm-notes {
  align-content: start;
  padding: clamp(20px, 3vw, 28px);
  background: var(--carbon-2);
  border: 1px solid var(--line);
  border-top: 2px solid var(--blue);
}

.page-news .notes-title {
  font-family: var(--sans);
  font-weight: 700;
  font-size: var(--step-16);
  letter-spacing: 0.02em;
  color: var(--white);
  margin: 0 0 18px;
}

.page-news .notes-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
}

.page-news .notes-list li {
  display: grid;
  gap: 6px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.page-news .notes-list li:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-news .notes-key {
  font-family: var(--mono);
  font-size: var(--step-12);
  letter-spacing: 0.06em;
  color: var(--grey);
}

.page-news .notes-list a {
  justify-self: start;
  font-size: var(--step-14);
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-news .notes-list a:hover,
.page-news .notes-list a:focus-visible {
  color: var(--green);
  border-bottom-color: var(--green);
}

.page-news .notes-list a:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 3px;
}

/* ---------- 中屏 ---------- */
@media (min-width: 760px) {
  .page-news .update-row {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 28px;
    padding: 32px 0;
  }

  .page-news .update-row:hover {
    padding-left: 16px;
  }

  .page-news .update-row::before {
    top: 24px;
    bottom: 24px;
  }

  .page-news .version-track {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 32px 36px;
    padding: 0;
  }

  .page-news .version-track::before {
    display: none;
  }

  .page-news .version-node {
    padding: 0;
    padding-top: 22px;
    border-top: 1px solid var(--line);
  }

  .page-news .version-dot {
    left: 0;
    top: -6px;
  }

  .page-news .version-node:last-child .version-dot {
    box-shadow: none;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1024px) {
  .page-news .update-layout {
    grid-template-columns: minmax(0, 1fr) var(--news-side);
    align-items: start;
  }

  .page-news .update-aside {
    position: sticky;
    top: 88px;
  }

  .page-news .topics {
    grid-template-columns: 1.35fr 1fr;
    grid-auto-rows: auto;
    align-items: start;
  }

  .page-news .topic--lead {
    grid-row: span 2;
    padding: clamp(30px, 3vw, 44px);
  }

  .page-news .topic--lead .topic-title {
    font-size: clamp(34px, 4.4vw, 52px);
  }

  .page-news .version-track {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0 24px;
  }

  .page-news .version-node {
    padding-right: 16px;
  }

  .page-news .rhythm-grid {
    grid-template-columns: minmax(0, 1fr) 300px;
    align-items: start;
  }
}

/* ---------- 降级与可访问性 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-news .update-row,
  .page-news .update-row::before,
  .page-news .update-index,
  .page-news .topic {
    transition: none;
  }

  .page-news .topic:hover {
    transform: none;
  }
}
<<<END>>>