.page-news {
  --news-max: 1200px;
  display: block;
  background: var(--base-900);
  color: var(--text-100);
  font-family: var(--font-sans);
}

.page-news .container {
  width: 100%;
  max-width: var(--news-max);
  margin-inline: auto;
  padding-inline: 20px;
}

/* ---------- 首屏 ---------- */
.page-news .news-hero {
  position: relative;
  border-bottom: 1px solid var(--line-600);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(201, 162, 39, 0.12), transparent 62%),
    var(--base-900);
}

.page-news .news-hero::before {
  content: "";
  display: block;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--brand-500) 28%, var(--brand-500) 72%, transparent);
}

.page-news .hero-intro {
  padding-block: 36px 30px;
}

.page-news .hero-kicker {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--brand-500);
  text-transform: uppercase;
}

.page-news h1 {
  margin: 0;
  max-width: 20ch;
  font-size: clamp(2rem, 7vw, 4.2rem);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--text-100);
}

.page-news .hero-lead {
  margin: 20px 0 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-100);
}

.page-news .hero-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 28px;
  border: 1px solid var(--line-600);
  background: var(--line-600);
}

.page-news .hero-meta-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 12px 14px;
  background: var(--base-900);
}

.page-news .hero-meta-key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--text-400);
  text-transform: uppercase;
}

.page-news .hero-meta-val {
  font-family: var(--font-mono);
  font-size: 17px;
  font-variant-numeric: tabular-nums;
  color: var(--brand-300);
}

.page-news .hero-figure {
  margin: 0;
  border-top: 1px solid var(--line-600);
  overflow: hidden;
}

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

/* ---------- 两栏主体 ---------- */
.page-news .news-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--gap-md);
  padding-block: 30px 0;
}

.page-news .index-label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--text-400);
  text-transform: uppercase;
  line-height: 1.6;
}

.page-news .index-hint {
  margin: 0 0 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-400);
}

.page-news .cat-chips {
  border-top: 1px solid var(--line-600);
}

.page-news .cat-chip {
  display: block;
  padding: 12px 12px 12px 14px;
  border-bottom: 1px solid var(--line-600);
  border-left: 2px solid transparent;
  color: var(--text-100);
  text-decoration: none;
  transition: background-color var(--dur-cut) var(--ease-cut), color var(--dur-cut) var(--ease-cut);
}

.page-news .cat-chip-name {
  display: block;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
}

.page-news .cat-chip-desc {
  display: block;
  margin-top: 3px;
  font-size: 12px;
  line-height: 1.6;
  opacity: 0.72;
}

.page-news .cat-chip:hover {
  background: var(--base-800);
}

.page-news .cat-chip--all {
  background: var(--brand-500);
  color: var(--base-900);
  border-left-color: var(--base-900);
}

.page-news .cat-chip:target {
  background: var(--brand-500);
  color: var(--base-900);
  border-left-color: var(--base-900);
}

.page-news:has(.cat-chip:target) .cat-chip:not(:target) {
  background: transparent;
  color: var(--text-100);
  border-left-color: transparent;
}

.page-news .cadence {
  margin-top: 20px;
  padding-left: 12px;
  border-left: 2px solid var(--brand-500);
}

.page-news .cadence-title {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--brand-300);
}

.page-news .cadence-text {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--text-400);
}

/* ---------- 置顶条目 ---------- */
.page-news .pinned {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  padding: 20px;
  background: var(--base-800);
  border: 1px solid var(--accent-600);
  box-shadow: inset 0 0 56px rgba(139, 30, 45, 0.24);
}

.page-news .pin-flag {
  display: inline-block;
  padding: 4px 10px;
  background: var(--accent-600);
  color: var(--surface-100);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
}

.page-news .pinned-title {
  margin: 14px 0 0;
  font-size: clamp(1.3rem, 4vw, 1.85rem);
  font-weight: 800;
  line-height: 1.32;
  letter-spacing: -0.01em;
  color: var(--text-100);
}

.page-news .pinned-desc {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-400);
}

.page-news .lamp-row {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 18px;
}

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

.page-news .lamp-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 1px solid var(--line-600);
  background: var(--base-900);
  flex: none;
}

.page-news .lamp--on .lamp-dot {
  background: var(--chart-amber);
  border-color: var(--chart-amber);
  box-shadow: 0 0 0 4px rgba(240, 166, 60, 0.16);
  animation: news-lamp-breathe 2.4s ease-in-out infinite;
}

.page-news .lamp-text {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text-400);
}

.page-news .pinned .btn {
  margin-top: 20px;
}

.page-news .pinned-figure {
  margin: 0;
  border: 1px solid var(--line-600);
}

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

@keyframes news-lamp-breathe {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

/* ---------- 条目流 ---------- */
.page-news .entries {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  border-top: 1px solid var(--line-600);
}

.page-news .entry {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 12px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line-600);
}

.page-news .entry-num {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.06em;
  color: var(--brand-500);
}

.page-news .entry-title {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.48;
  color: var(--text-100);
}

.page-news .entry-desc {
  margin: 7px 0 0;
  max-width: 58ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-400);
}

.page-news .entry-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
}

.page-news .entry-time {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--text-400);
}

.page-news .tag {
  display: inline-block;
  padding: 2px 8px;
  border: 1px solid currentColor;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  line-height: 1.6;
}

.page-news .tag--observe {
  color: var(--chart-teal);
}

.page-news .tag--version {
  color: var(--chart-amber);
}

.page-news .tag--method {
  color: var(--brand-300);
}

.page-news .tag--archive {
  background: var(--accent-600);
  border-color: var(--accent-600);
  color: var(--surface-100);
}

.page-news .entry-figure {
  margin: 14px 0 0;
  border: 1px solid var(--line-600);
}

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

/* 栏目筛选：仅在支持 :has() 时生效，其余情况全部条目照常显示 */
.page-news:has(#filter-observe:target) .entry:not(.entry--observe),
.page-news:has(#filter-version:target) .entry:not(.entry--version),
.page-news:has(#filter-method:target) .entry:not(.entry--method),
.page-news:has(#filter-archive:target) .entry:not(.entry--archive) {
  display: none;
}

/* ---------- 专题连载 ---------- */
.page-news .series {
  margin-top: 56px;
  padding-top: 30px;
  border-top: 1px solid var(--line-600);
}

.page-news .eyebrow {
  margin: 0 0 10px;
  padding-left: 14px;
  position: relative;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--brand-500);
  text-transform: uppercase;
}

.page-news .eyebrow::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 8px;
  height: 2px;
  background: var(--brand-500);
}

.page-news h2 {
  margin: 0;
  font-size: clamp(1.3rem, 4.2vw, 1.9rem);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--text-100);
}

.page-news .series-lead {
  margin: 12px 0 0;
  max-width: 54ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-400);
}

.page-news .series-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  margin-top: 24px;
}

.page-news .series-cards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  align-content: start;
}

.page-news .series-card {
  background: var(--base-800);
  border: 1px solid var(--line-600);
  padding: 16px 18px;
}

.page-news .series-card summary {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--brand-300);
}

.page-news .series-card summary::-webkit-details-marker {
  display: none;
}

.page-news .series-card summary::after {
  content: "＋";
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--brand-500);
}

.page-news .series-card details[open] summary::after {
  content: "－";
}

.page-news .series-list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  border-top: 1px solid var(--line-600);
}

.page-news .series-list li {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 10px;
  padding: 9px 0;
  border-bottom: 1px solid var(--line-600);
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--text-400);
}

.page-news .series-list li span:first-child {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--brand-500);
}

.page-news .series-figure {
  margin: 0;
  border: 1px solid var(--line-600);
  display: flex;
  flex-direction: column;
}

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

.page-news .series-figure figcaption {
  padding: 10px 12px;
  border-top: 1px solid var(--line-600);
  font-size: 12px;
  line-height: 1.7;
  color: var(--text-400);
}

/* ---------- 结尾入口 ---------- */
.page-news .news-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  margin-top: 56px;
  padding: 26px 20px;
  border: 1px solid var(--line-600);
  background:
    linear-gradient(180deg, rgba(201, 162, 39, 0.09), transparent 72%),
    var(--base-800);
}

.page-news .cta-copy p:last-child {
  margin: 12px 0 0;
  max-width: 56ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-400);
}

.page-news .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: flex-start;
}

.page-news .cta-actions .btn {
  flex: 1 1 auto;
  text-align: center;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-news .hero-meta {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-news .hero-lead {
    font-size: 17px;
  }

  .page-news .entry {
    grid-template-columns: 52px minmax(0, 1fr);
    gap: 18px;
    padding: 24px 0;
  }

  .page-news .entry-title {
    font-size: 19px;
  }

  .page-news .pinned {
    padding: 26px;
  }

  .page-news .news-cta {
    padding: 32px 28px;
  }
}

@media (min-width: 860px) {
  .page-news .hero-intro {
    padding-block: 56px 40px;
  }

  .page-news .pinned {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: center;
    gap: 28px;
    padding: 30px;
  }

  .page-news .series-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 24px;
    align-items: start;
  }

  .page-news .news-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
    padding: 38px 36px;
  }

  .page-news .cta-actions {
    flex-direction: column;
    align-items: stretch;
    min-width: 200px;
  }

  .page-news .cta-actions .btn {
    flex: 0 0 auto;
  }
}

@media (min-width: 960px) {
  .page-news .news-layout {
    grid-template-columns: 250px minmax(0, 1fr);
    gap: var(--gap-lg);
    padding-block: 52px 0;
  }

  .page-news .column-index {
    position: sticky;
    top: calc(var(--topbar-h) + 24px);
    align-self: start;
  }

  .page-news .container {
    padding-inline: 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-news .lamp--on .lamp-dot {
    animation: none;
  }

  .page-news .cat-chip {
    transition: none;
  }
}