.page-news {
  --news-rail-w: 240px;
  --news-mark: 6px;
  display: block;
  background: var(--indigo);
  color: var(--fog);
  padding: clamp(20px, 3vw, 40px) 0 clamp(56px, 9vw, 120px);
}

.page-news .section + .section {
  margin-top: clamp(40px, 6vw, 76px);
}

/* ---------- 页头 ---------- */
.page-news .news-head {
  position: relative;
  padding: clamp(28px, 5vw, 64px) 0 clamp(22px, 3.5vw, 40px);
  border-bottom: 2px solid var(--asphalt);
}

.page-news .news-head .eyebrow {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--amber);
  margin: 0 0 14px;
}

.page-news .news-head .page-title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(30px, 6.4vw, 68px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
  max-width: 15em;
  color: var(--fog);
}

.page-news .news-head .page-lede {
  font-family: var(--font-body);
  font-size: clamp(15px, 1.7vw, 18px);
  line-height: 1.78;
  margin: 0;
  max-width: 54ch;
  color: var(--fog);
  opacity: 0.82;
}

.page-news .head-annot {
  display: none;
  position: absolute;
  right: 0;
  top: clamp(40px, 7vw, 84px);
  writing-mode: vertical-rl;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--amber);
  opacity: 0.7;
}

@media (min-width: 900px) {
  .page-news .head-annot {
    display: block;
  }
}

/* ---------- 主布局：窄栏 + 宽列表 ---------- */
.page-news .news-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
  padding-top: clamp(30px, 4.5vw, 54px);
}

@media (min-width: 900px) {
  .page-news .news-layout {
    grid-template-columns: var(--news-rail-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-news .news-rail {
    position: sticky;
    top: 96px;
  }
}

.page-news .news-rail {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.page-news .rail-block {
  border-top: 2px solid var(--asphalt);
  padding-top: 12px;
}

.page-news .rail-title {
  font-family: var(--font-num);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--amber);
  margin: 0 0 10px;
}

.page-news .rail-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-news .rail-links a {
  display: block;
  font-size: 14px;
  line-height: 1.5;
  color: var(--fog);
  text-decoration: none;
  padding: 2px 0 2px 12px;
  border-left: 2px solid transparent;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-news .rail-links a:hover,
.page-news .rail-links a:focus-visible {
  border-left-color: var(--amber);
  color: var(--mane);
}

.page-news .rail-links--route a {
  border-left-color: var(--asphalt);
}

.page-news .tag-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-news .tag-shape {
  display: inline-flex;
  align-items: center;
  padding: 5px 16px 5px 11px;
  background: var(--amber);
  color: var(--ink);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.04em;
  white-space: nowrap;
  clip-path: polygon(0 0, calc(100% - 9px) 0, 100% 50%, calc(100% - 9px) 100%, 0 100%);
}

.page-news .tag-shape--calib {
  background: var(--mane);
}

.page-news .tag-shape--topic {
  background: var(--orange);
  color: #ffffff;
}

.page-news .tag-shape--version {
  background: var(--panel);
  color: var(--mane);
  box-shadow: inset 0 0 0 1px var(--asphalt);
}

/* ---------- 最新发布列表 ---------- */
.page-news .feed {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 2px solid var(--asphalt);
}

.page-news .feed-item {
  display: grid;
  grid-template-columns: var(--news-mark) minmax(0, 1fr);
  gap: 16px;
  padding: 22px 0 24px;
  border-bottom: 1px solid var(--asphalt);
}

.page-news .feed-mark {
  display: block;
  width: 3px;
  min-height: 30px;
  background: var(--amber);
  transition: width 0.22s var(--ease), background-color 0.22s var(--ease);
}

.page-news .feed-item:hover .feed-mark,
.page-news .feed-item:focus-within .feed-mark {
  width: var(--news-mark);
  background: var(--orange);
}

.page-news .feed-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  margin-bottom: 10px;
}

.page-news .feed-time {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mane);
}

.page-news .feed-title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(17px, 2.1vw, 22px);
  line-height: 1.36;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
  color: var(--fog);
}

.page-news .feed-text {
  font-size: 15px;
  line-height: 1.72;
  margin: 0 0 10px;
  color: var(--fog);
  opacity: 0.8;
  max-width: 60ch;
}

.page-news .feed-more {
  margin-top: 4px;
}

.page-news .feed-more summary {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--amber);
}

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

.page-news .feed-more summary::before {
  content: "+";
  font-size: 15px;
  line-height: 1;
}

.page-news .feed-more[open] summary::before {
  content: "\2212";
}

.page-news .feed-more summary:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}

.page-news .feed-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 30px;
  margin: 12px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--asphalt);
}

.page-news .feed-meta > div {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-news .feed-meta dt {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mane);
}

.page-news .feed-meta dd {
  margin: 0;
  font-size: 14px;
  color: var(--fog);
}

/* ---------- 目录校准记录 ---------- */
.page-news .calib-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 40px);
  border-top: 2px solid var(--asphalt);
  padding-top: clamp(20px, 3vw, 32px);
}

@media (min-width: 860px) {
  .page-news .calib-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.62fr);
    align-items: start;
  }
}

.page-news .calib-chart {
  display: flex;
  flex-direction: column;
  gap: 13px;
}

.page-news .calib-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--asphalt);
}

.page-news .calib-key {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--fog);
  opacity: 0.85;
}

.page-news .calib-key::before {
  content: "";
  width: 16px;
  height: 6px;
  background: var(--amber);
}

.page-news .calib-key--fix::before {
  background: var(--asphalt);
}

.page-news .calib-row {
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
}

.page-news .calib-month {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--mane);
}

.page-news .calib-bars {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-news .calib-bar {
  display: block;
  height: 7px;
  min-width: 3px;
}

.page-news .calib-bar--add {
  background: linear-gradient(90deg, var(--amber), var(--mane));
}

.page-news .calib-bar--fix {
  background: var(--asphalt);
}

.page-news .calib-val {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--fog);
  opacity: 0.78;
  white-space: nowrap;
}

.page-news .calib-foot {
  margin: 10px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--asphalt);
  font-size: 14px;
  line-height: 1.8;
  color: var(--fog);
  opacity: 0.78;
  max-width: 56ch;
}

.page-news .calib-figure {
  margin: 0;
  aspect-ratio: 3 / 2;
  overflow: hidden;
  position: relative;
}

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

/* ---------- 版本迭代日志 ---------- */
.page-news .version-track {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 2px solid var(--asphalt);
}

.page-news .version-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: 18px 0;
  border-bottom: 1px solid var(--asphalt);
}

@media (min-width: 760px) {
  .page-news .version-item {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
  }
}

.page-news .version-no {
  font-family: var(--font-num);
  font-size: clamp(22px, 3.4vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
  letter-spacing: -0.01em;
}

.page-news .version-title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(16px, 1.9vw, 20px);
  line-height: 1.4;
  margin: 0 0 6px;
  color: var(--fog);
}

.page-news .version-text {
  font-size: 15px;
  line-height: 1.72;
  margin: 0 0 6px;
  color: var(--fog);
  opacity: 0.82;
  max-width: 58ch;
}

.page-news .version-impact {
  font-size: 14px;
  line-height: 1.7;
  margin: 0;
  padding-left: 12px;
  border-left: 2px solid var(--mane);
  color: var(--mane);
  max-width: 58ch;
}

/* ---------- 线路专题 ---------- */
.page-news .topic-stack {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px;
  background: var(--asphalt);
  border-top: 2px solid var(--asphalt);
  border-bottom: 2px solid var(--asphalt);
}

.page-news .topic {
  display: grid;
  grid-template-columns: 1fr;
  margin: 0;
  background: var(--indigo);
}

.page-news .topic-figure {
  margin: 0;
  position: relative;
  overflow: hidden;
  aspect-ratio: 3 / 2;
}

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

.page-news .topic-body {
  padding: clamp(22px, 3.6vw, 40px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 10px;
}

.page-news .topic-index {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--amber);
  margin: 0;
}

.page-news .topic-title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(26px, 4.4vw, 46px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0;
  color: var(--fog);
}

.page-news .topic-text {
  font-size: 15px;
  line-height: 1.78;
  margin: 0;
  color: var(--fog);
  opacity: 0.82;
  max-width: 46ch;
}

.page-news .topic-list {
  list-style: none;
  margin: 6px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.page-news .topic-list li {
  position: relative;
  padding-left: 17px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--mane);
}

.page-news .topic-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 8px;
  height: 1px;
  background: var(--amber);
}

@media (min-width: 1000px) {
  .page-news .topic-stack {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-news .topic--lead {
    grid-column: 1 / -1;
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  }

  .page-news .topic--lead .topic-figure {
    aspect-ratio: auto;
    min-height: 100%;
  }
}

/* ---------- 订阅与回顾 ---------- */
.page-news .digest-panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
  background: var(--cream);
  color: var(--ink);
  padding: clamp(26px, 4.5vw, 52px);
  border-top: 2px solid var(--asphalt);
}

@media (min-width: 900px) {
  .page-news .digest-panel {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    align-items: start;
  }
}

.page-news .digest-title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(22px, 3.2vw, 34px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0 0 14px;
  color: var(--ink);
}

.page-news .digest-text {
  font-size: 15px;
  line-height: 1.8;
  margin: 0 0 12px;
  color: var(--ink);
  opacity: 0.84;
  max-width: 52ch;
}

.page-news .digest-main .btn {
  margin-top: 8px;
}

.page-news .archive-title {
  font-family: var(--font-num);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--ink);
  opacity: 0.6;
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--ink);
}

.page-news .archive-list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-news .archive-list li {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
  opacity: 0.86;
}

.page-news .archive-time {
  display: inline-block;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink);
  background: rgba(27, 21, 17, 0.08);
  padding: 2px 8px;
  margin-right: 8px;
}

.page-news .archive-link {
  display: inline-block;
  font-size: 14px;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 2px solid var(--orange);
  padding-bottom: 2px;
}

.page-news .archive-link:hover,
.page-news .archive-link:focus-visible {
  color: var(--orange);
}

/* ---------- 通用可读性保障 ---------- */
.page-news a:focus-visible,
.page-news summary:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}

.page-news img {
  max-width: 100%;
  height: auto;
}

@media (prefers-reduced-motion: reduce) {
  .page-news .feed-mark,
  .page-news .rail-links a {
    transition: none;
  }
}
</main>