.page-news {
  --news-rule: rgba(201, 209, 201, 0.16);
  --news-rule-soft: rgba(201, 209, 201, 0.08);
  --news-paper-rule: rgba(10, 23, 19, 0.16);
  --news-block-gap: clamp(40px, 7vw, 76px);
  background: var(--ink-900);
  color: var(--rock);
  font-family: var(--font-body);
  line-height: 1.75;
  padding-bottom: clamp(48px, 8vw, 96px);
}

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

.page-news .breadcrumb {
  margin-top: clamp(16px, 3vw, 28px);
  font-size: 12px;
}

/* ---------- 页头 ---------- */
.page-news .ledger {
  display: grid;
  gap: clamp(16px, 3vw, 26px);
  padding-block: clamp(18px, 3.5vw, 36px) var(--news-block-gap);
}

.page-news .ledger h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(38px, 9vw, 76px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--chalk);
}

.page-news .ledger .lede {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(15px, 2vw, 17px);
  line-height: 1.8;
  color: var(--rock);
}

.page-news .ledger__stats {
  margin: 4px 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--news-rule);
  border: 1px solid var(--news-rule-soft);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-news .ledger__stat {
  background: var(--ink-800);
  padding: clamp(12px, 2.2vw, 18px);
}

.page-news .ledger__stat dt {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(19px, 3.4vw, 26px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--lime);
}

.page-news .ledger__stat dd {
  margin: 6px 0 0;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--rock);
}

/* ---------- 章节头 ---------- */
.page-news .chapter {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding-top: 18px;
  border-top: 1px solid var(--news-rule);
  margin-bottom: clamp(20px, 3vw, 28px);
}

.page-news .chapter .section-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--lime);
}

.page-news .chapter h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 4.4vw, 34px);
  line-height: 1.15;
  letter-spacing: -0.015em;
  color: var(--chalk);
}

.page-news .chapter__note {
  margin: 0;
  flex: 1 1 200px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 折叠摘要通用 ---------- */
.page-news summary {
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  width: fit-content;
  cursor: pointer;
  font-size: 13px;
  line-height: 1.5;
  color: var(--data);
}

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

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

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

.page-news summary:hover {
  color: var(--lime);
}

/* ---------- 本期焦点 ---------- */
.page-news .focus {
  padding-bottom: var(--news-block-gap);
}

.page-news .focus__grid {
  display: grid;
  gap: 16px;
}

.page-news .focus__side {
  display: grid;
  gap: 16px;
}

.page-news .lead-card {
  display: flex;
  flex-direction: column;
  background: var(--ink-800);
  border: 1px solid var(--news-rule-soft);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-news .lead-card__media {
  aspect-ratio: 16 / 9;
  background: var(--moss);
  overflow: hidden;
}

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

.page-news .lead-card__body {
  padding: clamp(18px, 3vw, 30px);
  display: grid;
  gap: 12px;
}

.page-news .lead-card__meta {
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-news .lead-card__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 3.6vw, 34px);
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: var(--chalk);
}

.page-news .lead-card__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--rock);
  max-width: 60ch;
}

.page-news .side-card {
  display: grid;
  gap: 8px;
  padding: clamp(16px, 2.6vw, 24px);
  background: var(--moss);
  border-left: 3px solid var(--data);
  border-radius: var(--r-md);
}

.page-news .side-card--alt {
  background: var(--ink-800);
  border-left-color: var(--signal);
}

.page-news .side-card .mono {
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-news .side-card h3 {
  margin: 0;
  font-size: clamp(16px, 2.4vw, 19px);
  line-height: 1.4;
  color: var(--chalk);
}

.page-news .side-card p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--rock);
}

.page-news .link-more {
  justify-self: start;
  font-size: 13px;
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(198, 255, 74, 0.35);
  padding-bottom: 1px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-news .link-more:hover {
  color: var(--chalk);
  border-bottom-color: var(--chalk);
}

/* ---------- 观察清单 ---------- */
.page-news .board {
  padding-bottom: var(--news-block-gap);
}

.page-news .board__filter {
  position: relative;
}

.page-news .filter-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: 0;
  opacity: 0;
  pointer-events: none;
}

.page-news .filter-bar {
  position: sticky;
  top: var(--bar-h);
  z-index: 4;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 12px 0;
  margin-bottom: 4px;
  background: var(--ink-900);
  border-bottom: 1px solid var(--news-rule-soft);
}

.page-news .board__filter:focus-within .filter-bar {
  box-shadow: 0 0 0 2px var(--line-lime);
  border-radius: 14px;
}

.page-news .filter-chip {
  display: inline-flex;
  align-items: center;
  padding: 7px 15px;
  border: 1px solid var(--news-rule);
  border-radius: 999px;
  background: var(--ink-800);
  color: var(--rock);
  font-size: 13px;
  line-height: 1.2;
  cursor: pointer;
  user-select: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-news .filter-chip:hover {
  border-color: var(--line-lime);
  color: var(--chalk);
}

.page-news .board:has(#rf-all:checked) .filter-chip[for="rf-all"],
.page-news .board:has(#rf-version:checked) .filter-chip[for="rf-version"],
.page-news .board:has(#rf-data:checked) .filter-chip[for="rf-data"],
.page-news .board:has(#rf-service:checked) .filter-chip[for="rf-service"],
.page-news .board:has(#rf-schedule:checked) .filter-chip[for="rf-schedule"] {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--ink-900);
  font-weight: 700;
}

.page-news .board:has(#rf-version:checked) .report-item:not([data-cat="version"]),
.page-news .board:has(#rf-data:checked) .report-item:not([data-cat="data"]),
.page-news .board:has(#rf-service:checked) .report-item:not([data-cat="service"]),
.page-news .board:has(#rf-schedule:checked) .report-item:not([data-cat="schedule"]) {
  display: none;
}

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

.page-news .report-item {
  display: grid;
  gap: 8px;
  padding: clamp(16px, 2.6vw, 22px) 0;
  border-bottom: 1px solid var(--news-rule-soft);
}

.page-news .report-item__tag {
  display: flex;
  align-items: flex-start;
}

.page-news .report-item__body {
  display: grid;
  gap: 6px;
}

.page-news .report-item__title {
  margin: 0;
  font-size: clamp(16.5px, 2.2vw, 20px);
  font-weight: 700;
  line-height: 1.45;
  color: var(--chalk);
}

.page-news .report-item__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-news .report-item details p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--rock);
  max-width: 68ch;
}

.page-news .tag--signal {
  background: rgba(255, 122, 61, 0.16);
  border: 1px solid rgba(255, 122, 61, 0.42);
  color: #FFB591;
}

/* ---------- 数据观察方法（浅色档案区） ---------- */
.page-news .method {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  margin-bottom: var(--news-block-gap);
  padding: clamp(22px, 4vw, 48px);
  background: var(--chalk);
  color: var(--ink-700);
  border-radius: var(--r-lg);
}

.page-news .method__grid {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}

.page-news .method .section-num {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--clay);
}

.page-news .method h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(23px, 3.8vw, 32px);
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--ink-900);
}

.page-news .method p {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-700);
  max-width: 60ch;
}

.page-news .method__media {
  margin-top: 18px;
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--news-paper-rule);
}

.page-news .method__media img {
  display: block;
  width: 100%;
  height: auto;
}

.page-news .steps {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-news .step {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--news-paper-rule);
}

.page-news .step:first-child {
  border-top: 1px dashed var(--news-paper-rule);
}

.page-news .step__num {
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--clay);
}

.page-news .step h3 {
  margin: 0;
  font-size: 16px;
  line-height: 1.4;
  color: var(--ink-900);
}

.page-news .step p {
  margin: 5px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--ink-700);
}

.page-news .method__checklist h3 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(19px, 2.8vw, 24px);
  letter-spacing: -0.01em;
  color: var(--ink-900);
}

.page-news .checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-news .checklist li {
  padding: 12px 14px;
  background: rgba(10, 23, 19, 0.055);
  border-top: 2px solid var(--clay);
  border-radius: var(--r-sm);
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--ink-700);
}

/* ---------- 常设系列 ---------- */
.page-news .series {
  padding-bottom: var(--news-block-gap);
}

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

.page-news .series-card {
  display: flex;
  flex-direction: column;
  background: var(--ink-800);
  border: 1px solid var(--news-rule-soft);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-news .series-card__media {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--moss);
}

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

.page-news .series-card__body {
  display: grid;
  gap: 8px;
  padding: clamp(16px, 2.4vw, 22px);
}

.page-news .series-card__body .tag {
  justify-self: start;
}

.page-news .series-card__body h3 {
  margin: 0;
  font-size: 18px;
  line-height: 1.4;
  color: var(--chalk);
}

.page-news .series-card__body p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--rock);
}

.page-news .series-card__next {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

/* ---------- 更新节奏 ---------- */
.page-news .cadence {
  padding-bottom: clamp(20px, 4vw, 40px);
}

.page-news .cadence__list {
  list-style: none;
  margin: 0 0 clamp(24px, 4vw, 36px);
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-news .cadence__item {
  padding: 2px 0 2px 14px;
  border-left: 3px solid var(--lime);
}

.page-news .cadence__item h3 {
  margin: 0;
  font-size: 15px;
  line-height: 1.45;
  color: var(--chalk);
}

.page-news .cadence__item p {
  margin: 6px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--rock);
}

.page-news .subscribe {
  display: grid;
  gap: 16px;
  padding: clamp(18px, 3vw, 30px);
  background: var(--ink-800);
  border: 1px dashed var(--line-lime);
  border-radius: var(--r-md);
}

.page-news .subscribe h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(19px, 2.8vw, 24px);
  letter-spacing: -0.01em;
  color: var(--chalk);
}

.page-news .subscribe p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--rock);
  max-width: 62ch;
}

.page-news .subscribe .mono {
  color: var(--data);
  word-break: break-all;
}

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

/* ---------- 尾部长链 ---------- */
.page-news .tail {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  padding-top: 18px;
  border-top: 1px solid var(--news-rule-soft);
}

.page-news .tail a {
  font-size: 13.5px;
  color: var(--rock);
  text-decoration: none;
  border-bottom: 1px solid var(--news-rule);
  padding-bottom: 2px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-news .tail a:hover {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-news .report-item {
    grid-template-columns: 118px minmax(0, 1fr);
    gap: 22px;
    align-items: start;
  }

  .page-news .series-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }

  .page-news .checklist {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 10px;
  }

  .page-news .cadence__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

@media (min-width: 760px) {
  .page-news .ledger__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 880px) {
  .page-news .focus__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: 20px;
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-news .method__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 48px);
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-news .filter-bar {
    top: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-news .filter-chip,
  .page-news .link-more,
  .page-news .tail a {
    transition: none;
  }
}