.page-news {
  --news-rail: 220px;
  color: var(--text);
  padding-bottom: clamp(64px, 9vw, 132px);
}

/* ---------- 页头 ---------- */
.page-news .news-masthead {
  position: relative;
  padding-block: clamp(24px, 4vw, 48px) clamp(20px, 3vw, 36px);
  border-bottom: 1px solid var(--line-600);
  isolation: isolate;
}

.page-news .news-masthead::before {
  content: "";
  position: absolute;
  inset: -30% -6% 18% -6%;
  background-image:
    linear-gradient(var(--line-600) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-600) 1px, transparent 1px);
  background-size: 96px 96px;
  opacity: 0.4;
  -webkit-mask-image: radial-gradient(120% 90% at 22% 10%, #000 0%, transparent 72%);
  mask-image: radial-gradient(120% 90% at 22% 10%, #000 0%, transparent 72%);
  pointer-events: none;
  z-index: -1;
}

.page-news .news-masthead__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(34px, 6.4vw, 76px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  margin: 12px 0 0;
  max-width: 20ch;
  color: var(--text);
}

.page-news .news-masthead__lede {
  max-width: 64ch;
  margin: 20px 0 0;
  color: var(--text-dim);
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.78;
}

.page-news .news-masthead__facts {
  list-style: none;
  margin: 30px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--line-600);
  display: flex;
  flex-wrap: wrap;
  gap: 10px 30px;
}

.page-news .news-masthead__facts li {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  color: var(--text-dim);
  font-size: 13px;
}

.page-news .news-masthead__facts .mono {
  color: var(--cyan);
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
}

.page-news .news-masthead__figure {
  margin: clamp(26px, 4vw, 44px) 0 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--line-600);
  background: var(--ink-800);
  aspect-ratio: 16 / 9;
}

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

/* ---------- 索引区 ---------- */
.page-news .news-index {
  display: grid;
  gap: clamp(24px, 3.5vw, 44px);
  padding-top: clamp(32px, 5vw, 60px);
  align-items: start;
}

.page-news .news-rail__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--text-dim);
  text-transform: uppercase;
}

.page-news .news-rail__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.page-news .news-rail__nav a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 9px 16px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line-600);
  color: var(--text-dim);
  font-size: 14px;
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.page-news .news-rail__nav a:hover {
  color: var(--text);
  border-color: var(--cyan);
  background: rgba(37, 230, 211, 0.08);
}

.page-news .news-rail__nav .mono {
  color: var(--cyan);
  font-size: 12px;
}

/* ---------- 筛选 ---------- */
.page-news .news-index__stream {
  position: relative;
  min-width: 0;
}

.page-news .nf-input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.page-news .news-filter__bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line-600);
}

.page-news .nf-pill {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line-600);
  background: var(--ink-800);
  color: var(--text-dim);
  font-size: 13px;
  cursor: pointer;
  user-select: none;
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.page-news .nf-pill:hover {
  color: var(--text);
  border-color: var(--cyan);
}

.page-news #nf-all:checked ~ .news-filter__bar [for="nf-all"],
.page-news #nf-notice:checked ~ .news-filter__bar [for="nf-notice"],
.page-news #nf-rules:checked ~ .news-filter__bar [for="nf-rules"],
.page-news #nf-batch:checked ~ .news-filter__bar [for="nf-batch"],
.page-news #nf-version:checked ~ .news-filter__bar [for="nf-version"],
.page-news #nf-topic:checked ~ .news-filter__bar [for="nf-topic"] {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink-900);
  font-weight: 700;
}

.page-news :is(#nf-all, #nf-notice, #nf-rules, #nf-batch, #nf-version, #nf-topic):focus-visible ~ .news-filter__bar .nf-pill {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

.page-news #nf-notice:checked ~ .news-feed .feed-item:not(.cat-notice),
.page-news #nf-rules:checked ~ .news-feed .feed-item:not(.cat-rules),
.page-news #nf-batch:checked ~ .news-feed .feed-item:not(.cat-batch),
.page-news #nf-version:checked ~ .news-feed .feed-item:not(.cat-version),
.page-news #nf-topic:checked ~ .news-feed .feed-item:not(.cat-topic) {
  display: none;
}

/* ---------- 列表 ---------- */
.page-news .news-feed {
  display: grid;
}

.page-news .feed-item {
  position: relative;
  display: grid;
  gap: 10px;
  padding: clamp(22px, 3vw, 34px) 0;
  border-bottom: 1px solid var(--line-600);
}

.page-news .feed-item::after {
  content: "";
  position: absolute;
  inset: 0 -18px;
  border-radius: var(--r-md);
  background: linear-gradient(90deg, rgba(37, 230, 211, 0.09), transparent 62%);
  opacity: 0;
  transition: opacity 0.22s ease;
  pointer-events: none;
}

.page-news .feed-item:hover::after {
  opacity: 1;
}

.page-news .feed-item__idx {
  position: relative;
  z-index: 1;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-news .feed-item__body {
  position: relative;
  z-index: 1;
  min-width: 0;
}

.page-news .feed-item__time {
  align-self: center;
  font-size: 12px;
  color: var(--text-dim);
}

.page-news .feed-item__title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(19px, 2.4vw, 26px);
  line-height: 1.32;
  letter-spacing: -0.01em;
  margin: 12px 0 0;
  color: var(--text);
}

.page-news .feed-item__lede {
  margin: 10px 0 0;
  max-width: 68ch;
  color: var(--text-dim);
  font-size: 15.5px;
  line-height: 1.78;
}

.page-news .feed-item__toggle {
  margin-top: 16px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line-600);
  background: transparent;
  color: var(--cyan);
  font-family: inherit;
  font-size: 13px;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.page-news .feed-item__toggle::before {
  content: "+";
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1;
}

.page-news .feed-item[data-open] .feed-item__toggle::before {
  content: "–";
}

.page-news .feed-item__toggle:hover {
  border-color: var(--cyan);
  background: rgba(37, 230, 211, 0.08);
}

.page-news .feed-item[data-open] .feed-item__panel {
  margin-top: 18px;
}

.page-news .feed-item__points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-news .feed-item__points li {
  position: relative;
  padding-left: 22px;
  color: var(--text-dim);
  font-size: 14.5px;
  line-height: 1.72;
}

.page-news .feed-item__points li::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 0.62em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(37, 230, 211, 0.16);
}

.page-news .feed-item__link {
  margin: 16px 0 0;
  font-size: 13.5px;
  color: var(--text-dim);
}

.page-news .feed-item__link a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(37, 230, 211, 0.42);
}

.page-news .feed-item__link a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 通用区块 ---------- */
.page-news .news-section {
  padding-top: clamp(56px, 8vw, 104px);
  scroll-margin-top: 96px;
}

.page-news .ns-head {
  max-width: 760px;
}

.page-news .ns-head__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(28px, 4.4vw, 48px);
  line-height: 1.12;
  letter-spacing: -0.015em;
  margin: 12px 0 0;
  color: var(--text);
}

.page-news .ns-head__lede {
  margin: 16px 0 0;
  color: var(--text-dim);
  font-size: 16px;
  line-height: 1.78;
}

.page-news .ns-figure {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--line-600);
  background: var(--ink-800);
}

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

/* ---------- 当前专题 ---------- */
.page-news .topic-grid {
  display: grid;
  gap: 20px;
  margin-top: clamp(26px, 4vw, 40px);
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.page-news .topic-card {
  --topic-accent: var(--cyan);
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(20px, 3vw, 30px);
  border-radius: var(--r-lg);
  border: 1px solid var(--line-600);
  background: var(--ink-800);
  overflow: hidden;
  transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
}

.page-news .topic-card--magenta { --topic-accent: var(--magenta); }
.page-news .topic-card--cyan { --topic-accent: var(--cyan); }
.page-news .topic-card--gold { --topic-accent: var(--gold); }

.page-news .topic-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--topic-accent);
}

.page-news .topic-card:hover {
  transform: translateY(-2px);
  border-color: var(--topic-accent);
  box-shadow: 0 20px 44px -28px var(--topic-accent);
}

.page-news .topic-card__no {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--topic-accent);
}

.page-news .topic-card__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.3;
  color: var(--text);
}

.page-news .topic-card__text {
  margin: 0;
  flex: 1;
  color: var(--text-dim);
  font-size: 14.5px;
  line-height: 1.78;
}

.page-news .topic-card__foot {
  margin: 4px 0 0;
  font-size: 13.5px;
}

.page-news .topic-card__foot a {
  color: var(--topic-accent);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 1px;
}

/* ---------- 批次归档 ---------- */
.page-news .ns-batch__body {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  margin-top: clamp(26px, 4vw, 40px);
}

.page-news .ns-panel {
  border-radius: var(--r-lg);
  border: 1px solid var(--line-600);
  background: var(--ink-800);
  padding: clamp(22px, 3vw, 34px);
}

.page-news .ns-spec {
  margin: 0;
  display: grid;
}

.page-news .ns-spec__row {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 14px;
  padding: 13px 0;
  border-bottom: 1px dashed var(--line-600);
  font-size: 14.5px;
}

.page-news .ns-spec__row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-news .ns-spec dt {
  color: var(--text-dim);
}

.page-news .ns-spec dd {
  margin: 0;
  color: var(--text);
}

.page-news .ns-spec dd.mono {
  color: var(--cyan);
  font-size: 15px;
}

.page-news .ns-steps {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-news .ns-steps li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  color: var(--text-dim);
  font-size: 14.5px;
  line-height: 1.7;
}

.page-news .ns-steps .mono {
  color: var(--magenta);
  font-size: 13px;
}

/* ---------- 规则解读 ---------- */
.page-news .ns-rules__figure {
  margin-top: clamp(26px, 4vw, 40px);
}

.page-news .ns-rules__paper {
  margin-top: clamp(20px, 3vw, 28px);
  display: grid;
  gap: clamp(26px, 3.5vw, 44px);
  padding: clamp(24px, 4vw, 52px);
  border-radius: var(--r-lg);
  border: 1px solid var(--paper-line);
  background: var(--paper);
  color: var(--ink-text);
}

.page-news .ns-paper__title {
  margin: 0 0 18px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(19px, 2.2vw, 24px);
  line-height: 1.34;
  color: var(--ink-text);
}

.page-news .ns-check {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 13px;
}

.page-news .ns-check li {
  position: relative;
  padding-left: 30px;
  font-size: 15px;
  line-height: 1.72;
  color: #2E2A22;
}

.page-news .ns-check li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.5em;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #0F6B62;
  box-shadow: inset 0 0 0 3px var(--paper);
}

.page-news .ns-check--warn li::before {
  background: #C23B18;
}

.page-news .ns-paper__note {
  margin: 20px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: #5A5244;
}

/* ---------- 版本迭代 ---------- */
.page-news .ns-versions__body {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  margin-top: clamp(26px, 4vw, 40px);
}

.page-news .ns-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  display: grid;
  gap: clamp(22px, 3vw, 32px);
}

.page-news .ns-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), var(--line-600));
}

.page-news .ns-timeline__item {
  position: relative;
  padding-left: 30px;
}

.page-news .ns-timeline__dot {
  position: absolute;
  left: 0;
  top: 7px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--cyan);
}

.page-news .ns-timeline__when {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-news .ns-timeline__title {
  margin: 8px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.34;
  color: var(--text);
}

.page-news .ns-timeline__text {
  margin: 8px 0 0;
  color: var(--text-dim);
  font-size: 14.5px;
  line-height: 1.75;
  max-width: 56ch;
}

/* ---------- 更新节奏 ---------- */
.page-news .ns-cadence__grid {
  display: grid;
  gap: 18px;
  margin-top: clamp(26px, 4vw, 40px);
}

.page-news .ns-cadence__cell {
  padding: clamp(20px, 3vw, 28px);
  border-radius: var(--r-md);
  border: 1px solid var(--line-600);
  background: linear-gradient(180deg, rgba(37, 230, 211, 0.07), transparent);
}

.page-news .ns-cadence__cell .mono {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-news .ns-cadence__cell h3 {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 18px;
  line-height: 1.34;
  color: var(--text);
}

.page-news .ns-cadence__cell p:last-child {
  margin: 10px 0 0;
  color: var(--text-dim);
  font-size: 14.5px;
  line-height: 1.75;
}

.page-news .ns-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 16px;
  margin-top: clamp(28px, 4vw, 44px);
}

.page-news .ns-cta__note {
  margin: 0;
  color: var(--text-dim);
  font-size: 14px;
}

.page-news .ns-cta__note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(37, 230, 211, 0.42);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-news .feed-item {
    grid-template-columns: 62px minmax(0, 1fr);
    gap: clamp(14px, 2.4vw, 28px);
  }

  .page-news .feed-item__idx {
    padding-top: 6px;
  }

  .page-news .ns-cadence__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

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

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

  .page-news .news-rail__nav {
    flex-direction: column;
  }

  .page-news .news-rail__nav a {
    justify-content: flex-start;
  }

  .page-news .ns-batch__body {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
  }

  .page-news .ns-rules__paper {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
}

@media (min-width: 1000px) {
  .page-news .ns-versions__body {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-news .topic-card,
  .page-news .feed-item::after,
  .page-news .nf-pill,
  .page-news .news-rail__nav a,
  .page-news .feed-item__toggle {
    transition: none;
  }

  .page-news .topic-card:hover {
    transform: none;
  }
}