.page-news {
  --news-rail-w: 6px;
  --news-rail-w-active: 12px;
}

/* ---------- 首屏 ---------- */
.page-news .news-hero {
  padding: clamp(18px, 4vw, 34px) 0 clamp(26px, 5vw, 52px);
}

.page-news .news-hero .breadcrumbs {
  margin-bottom: clamp(20px, 4vw, 38px);
}

.page-news .news-title {
  max-width: 20ch;
  margin: 0 0 20px;
  letter-spacing: 0.03em;
}

.page-news .news-lede {
  max-width: 46ch;
  margin-bottom: 30px;
}

.page-news .news-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-news .news-facts li {
  padding: 14px 16px;
  border-radius: var(--radius-md);
  background: var(--paper-raised);
  border: 1px solid var(--line);
}

.page-news .news-fact-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.15rem, 3vw, 1.5rem);
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--brand);
  line-height: 1.25;
}

.page-news .news-fact-label {
  display: block;
  margin-top: 4px;
  font-size: 0.82rem;
  color: var(--ink-soft);
  letter-spacing: 0.02em;
}

/* ---------- 通用图块 ---------- */
.page-news .news-figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--paper-raised);
}

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

.page-news .news-figure--season {
  margin-bottom: clamp(20px, 4vw, 34px);
}

.page-news .news-figure--season img {
  aspect-ratio: 14 / 9;
}

.page-news .news-figure--feed {
  margin: 0 0 clamp(24px, 4vw, 38px);
}

.page-news .news-figure--feed img {
  aspect-ratio: 3 / 2;
}

.page-news .news-figure--release img,
.page-news .news-figure--qa img {
  aspect-ratio: 3 / 2;
}

/* ---------- 专题季分段控件 ---------- */
.page-news .season-tabs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: clamp(18px, 3vw, 26px);
}

.page-news .season-tab {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 16px 16px 16px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--paper-raised);
  color: var(--ink);
  text-align: left;
  font: inherit;
  cursor: pointer;
  overflow: hidden;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.page-news .season-tab[data-season-tab="spring"] { --season-band: var(--spring); }
.page-news .season-tab[data-season-tab="summer"] { --season-band: var(--summer); }
.page-news .season-tab[data-season-tab="autumn"] { --season-band: var(--autumn); }
.page-news .season-tab[data-season-tab="winter"] { --season-band: var(--winter); }

.page-news .season-tab .season-band {
  position: absolute;
  inset: 0 auto 0 0;
  width: 6px;
  background: var(--season-band, var(--brand));
  transition: width var(--dur) var(--ease);
}

.page-news .season-tab:hover {
  transform: translateY(-2px);
}

.page-news .season-tab:hover .season-band {
  width: 12px;
}

.page-news .season-tab[aria-selected="true"] {
  background: var(--paper);
  border-color: var(--season-band);
  box-shadow: 0 0 0 2px var(--season-band) inset;
}

.page-news .season-tab-index {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--ink-muted);
}

.page-news .season-tab-title {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.page-news .season-tab-sub {
  font-size: 0.78rem;
  color: var(--ink-soft);
  letter-spacing: 0.02em;
}

/* ---------- 专题季面板 ---------- */
.page-news .season-panel {
  display: grid;
  gap: 20px;
  padding: clamp(18px, 4vw, 32px);
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: var(--paper-raised);
}

.page-news .season-panel[hidden] {
  display: none;
}

.page-news .season-panel[data-season-panel="spring"] { --season-band: var(--spring); }
.page-news .season-panel[data-season-panel="summer"] { --season-band: var(--summer); }
.page-news .season-panel[data-season-panel="autumn"] { --season-band: var(--autumn); }
.page-news .season-panel[data-season-panel="winter"] { --season-band: var(--winter); }

.page-news .season-panel-title {
  margin: 0 0 10px;
  font-size: clamp(1.1rem, 2.2vw, 1.4rem);
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-news .season-panel-title::before {
  content: "";
  display: block;
  width: 40px;
  height: 4px;
  border-radius: 4px;
  margin-bottom: 12px;
  background: var(--season-band, var(--brand));
}

.page-news .season-panel-main p {
  margin: 0 0 10px;
  color: var(--ink-soft);
}

.page-news .season-panel-meta {
  font-size: 0.82rem;
  color: var(--ink-muted);
  letter-spacing: 0.02em;
  margin: 0;
}

.page-news .season-panel-side {
  align-self: end;
}

.page-news .season-scale {
  display: block;
  width: 100%;
  max-width: 300px;
  height: 16px;
  color: var(--line-strong);
}

.page-news .season-scale .tick-on {
  fill: var(--season-band, var(--brand));
}

.page-news .season-scale-note {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}

/* ---------- 条目列表 ---------- */
.page-news .feed-group + .feed-group {
  margin-top: clamp(26px, 4.5vw, 46px);
}

.page-news .feed-group-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: 2px solid var(--line-strong);
}

.page-news .feed-group-title {
  margin: 0;
  font-size: 1.5rem;
  letter-spacing: 0.08em;
  color: var(--ink);
}

.page-news .feed-group-note {
  margin-left: auto;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--ink-muted);
  white-space: nowrap;
}

.page-news .feed-item {
  position: relative;
  padding: 16px 16px 16px 24px;
  border-radius: var(--radius-md);
  background: var(--paper-raised);
  border: 1px solid var(--line);
  overflow: hidden;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.page-news .feed-item + .feed-item {
  margin-top: 10px;
}

.page-news .feed-item[data-season="spring"] { --rail: var(--spring); }
.page-news .feed-item[data-season="summer"] { --rail: var(--summer); }
.page-news .feed-item[data-season="autumn"] { --rail: var(--autumn); }
.page-news .feed-item[data-season="winter"] { --rail: var(--winter); }

.page-news .feed-rail {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--news-rail-w);
  background: var(--rail, var(--brand));
  transition: width var(--dur-slow) var(--ease);
}

.page-news .feed-item:hover,
.page-news .feed-item:focus-within {
  transform: translateY(-2px);
  border-color: var(--line-strong);
  box-shadow: 0 8px 22px rgba(21, 18, 14, 0.07);
}

.page-news .feed-item:hover .feed-rail,
.page-news .feed-item:focus-within .feed-rail {
  width: var(--news-rail-w-active);
}

.page-news .feed-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 8px;
}

.page-news .feed-time {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--ink-muted);
}

.page-news .feed-title {
  margin: 0 0 6px;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  color: var(--ink);
  line-height: 1.5;
}

.page-news .feed-excerpt {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-news .feed-item--lead {
  padding: 20px 20px 20px 26px;
}

.page-news .feed-item--lead .feed-title {
  font-size: clamp(1.15rem, 2.4vw, 1.45rem);
}

.page-news .feed-item--lead .feed-excerpt {
  font-size: 0.96rem;
}

.page-news .feed-item--tail {
  padding: 11px 14px 11px 22px;
  background: var(--paper);
}

.page-news .feed-item--tail .feed-title {
  font-size: 0.98rem;
  margin-bottom: 3px;
}

.page-news .feed-item--tail .feed-excerpt {
  font-size: 0.86rem;
  line-height: 1.6;
}

.page-news .feed-item--tail .feed-meta {
  margin-bottom: 4px;
}

/* ---------- 版本与订阅 ---------- */
.page-news .release-track {
  list-style: none;
  margin: clamp(22px, 4vw, 32px) 0 0;
  padding: 0;
  position: relative;
}

.page-news .release-track::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 14px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(to bottom, var(--brand), var(--line-strong));
}

.page-news .release-item {
  position: relative;
  padding: 0 0 22px 32px;
}

.page-news .release-item:last-child {
  padding-bottom: 0;
}

.page-news .release-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--paper);
  border: 3px solid var(--rail, var(--brand));
}

.page-news .release-item[data-season="spring"] { --rail: var(--spring); }
.page-news .release-item[data-season="summer"] { --rail: var(--summer); }
.page-news .release-item[data-season="autumn"] { --rail: var(--autumn); }
.page-news .release-item[data-season="winter"] { --rail: var(--winter); }

.page-news .release-meta {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--ink-muted);
}

.page-news .release-title {
  margin: 0 0 4px;
  font-size: 1.02rem;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-news .release-text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-news .releases-side {
  margin-top: clamp(26px, 4vw, 0px);
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-news .releases-note {
  padding: 20px;
  border-radius: var(--radius-lg);
  background: var(--paper-raised);
  border: 1px solid var(--line);
}

.page-news .releases-note-title {
  margin: 0 0 8px;
  font-size: 1rem;
  letter-spacing: 0.06em;
  color: var(--ink);
}

.page-news .releases-note p {
  margin: 0 0 12px;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-news .releases-link {
  display: inline-block;
  font-size: 0.88rem;
  color: var(--brand);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
}

/* ---------- 读者提问 ---------- */
.page-news .qa-layout {
  display: grid;
  gap: clamp(18px, 3vw, 26px);
}

.page-news .qa-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-news .qa-card {
  position: relative;
  padding: 18px 18px 18px 20px;
  border-radius: var(--radius-md);
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-left: 6px solid var(--rail, var(--brand));
}

.page-news .qa-card[data-season="spring"] { --rail: var(--spring); }
.page-news .qa-card[data-season="summer"] { --rail: var(--summer); }
.page-news .qa-card[data-season="autumn"] { --rail: var(--autumn); }
.page-news .qa-card[data-season="winter"] { --rail: var(--winter); }

.page-news .qa-tag {
  margin: 0 0 8px;
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  color: var(--ink-muted);
}

.page-news .qa-question {
  margin: 0 0 8px;
  font-size: 1.02rem;
  letter-spacing: 0.02em;
  line-height: 1.55;
  color: var(--ink);
}

.page-news .qa-answer {
  margin: 0 0 12px;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-news .qa-link {
  font-size: 0.86rem;
  color: var(--brand);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
}

.page-news .news-figure--qa img {
  border-radius: var(--radius-lg);
}

/* ---------- 线索与投稿 ---------- */
.page-news .submit-shell {
  display: grid;
  gap: clamp(20px, 3vw, 30px);
  padding: clamp(22px, 4vw, 42px);
  border-radius: var(--radius-lg);
  background: var(--ink);
  color: var(--paper);
}

.page-news .submit-shell .eyebrow {
  color: var(--paper-raised);
}

.page-news .submit-shell .section-title {
  color: var(--paper);
}

.page-news .submit-main p {
  margin: 0 0 14px;
  color: rgba(251, 246, 236, 0.78);
  line-height: 1.8;
}

.page-news .submit-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.page-news .submit-shell .btn-primary {
  background: var(--brand);
  color: var(--paper);
}

.page-news .submit-shell .btn-ghost {
  background: transparent;
  color: var(--paper);
  border: 1px solid rgba(251, 246, 236, 0.42);
}

.page-news .submit-facts {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  align-content: start;
}

.page-news .submit-fact {
  padding: 14px 16px;
  border-radius: var(--radius-md);
  background: rgba(251, 246, 236, 0.07);
  border: 1px solid rgba(251, 246, 236, 0.16);
}

.page-news .submit-fact dt {
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  color: rgba(251, 246, 236, 0.6);
  margin-bottom: 6px;
}

.page-news .submit-fact dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  color: var(--spring-soft);
}

/* ---------- 回到顶部 ---------- */
.page-news .back-to-top {
  display: inline-block;
  margin: clamp(24px, 4vw, 42px) 0 clamp(30px, 5vw, 60px);
  padding: 10px 22px;
  border-radius: var(--pill);
  background: var(--paper-raised);
  border: 1px solid var(--line-strong);
  color: var(--ink);
  font-size: 0.86rem;
  letter-spacing: 0.08em;
  text-decoration: none;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-news .back-to-top:hover {
  background: var(--brand);
  border-color: var(--brand);
  color: var(--paper);
}

/* ---------- 焦点可见性 ---------- */
.page-news a:focus-visible,
.page-news button:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 768px) {
  .page-news .news-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-news .season-tabs {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-news .season-panel {
    grid-template-columns: minmax(0, 1.75fr) minmax(0, 1fr);
    align-items: end;
  }

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

  .page-news .submit-shell {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: start;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-news .news-figure--feed {
    max-width: 720px;
  }

  .page-news .qa-layout {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    align-items: start;
  }

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

  .page-news .releases-side {
    margin-top: 0;
  }
}

/* ---------- 降低动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-news .season-tab,
  .page-news .feed-item,
  .page-news .feed-rail,
  .page-news .back-to-top {
    transition: none;
  }

  .page-news .season-tab:hover,
  .page-news .feed-item:hover,
  .page-news .feed-item:focus-within {
    transform: none;
  }
}