.page-news {
  --news-hair: rgba(63, 227, 210, 0.28);
  --news-hair-ink: rgba(20, 25, 30, 0.16);
  overflow-x: hidden;
}

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

.page-news a:focus-visible,
.page-news button:focus-visible,
.page-news summary:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 4px;
  border-radius: 6px;
}

/* ---------- 首屏 ---------- */
.page-news .news-hero {
  position: relative;
  padding: 20px 0 56px;
  background:
    radial-gradient(120% 84% at 90% 0%, rgba(63, 227, 210, 0.14) 0%, rgba(8, 25, 42, 0) 58%),
    radial-gradient(96% 72% at 2% 102%, rgba(255, 138, 61, 0.1) 0%, rgba(8, 25, 42, 0) 62%),
    var(--abyss-900);
  border-bottom: 2px solid var(--abyss-500);
}

.page-news .hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: end;
}

.page-news .hero-kicker {
  margin: 24px 0 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--neon);
}

.page-news .hero-title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(26px, 6.6vw, 44px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--fg);
}

.page-news .hero-lead {
  margin: 18px 0 0;
  max-width: 34em;
  color: var(--fg-soft);
  font-size: 16px;
  line-height: 1.78;
}

.page-news .hero-note {
  margin: 16px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--amber);
  color: var(--mist);
  font-size: 14px;
  line-height: 1.72;
}

.page-news .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-news .hero-figure {
  margin: 8px 0 0;
}

.page-news .hero-figure img {
  display: block;
  width: 100%;
  aspect-ratio: 7 / 3;
  object-fit: cover;
  border: 2px solid var(--neon);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-hard);
}

@media (min-width: 900px) {
  .page-news .news-hero {
    padding: 24px 0 88px;
  }

  .page-news .hero-grid {
    grid-template-columns: 7fr 5fr;
    gap: 56px;
  }

  .page-news .hero-figure {
    margin: 0;
  }

  .page-news .hero-figure img {
    aspect-ratio: 7 / 5;
  }
}

/* ---------- 章节公共 ---------- */
.page-news .section-head {
  margin-bottom: 26px;
}

@media (min-width: 900px) {
  .page-news .section-head {
    margin-bottom: 40px;
  }
}

/* ---------- 01 条目流 ---------- */
.page-news .news-feed-zone {
  padding: 56px 0;
  background: linear-gradient(180deg, var(--abyss-700) 0%, var(--abyss-900) 46%);
}

@media (min-width: 900px) {
  .page-news .news-feed-zone {
    padding: 84px 0;
  }
}

.page-news .filter-wrap {
  position: relative;
}

.page-news .filter-bar {
  display: flex;
  gap: 10px;
  margin: 0 -4px;
  padding: 2px 4px 16px;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-news .filter-bar::-webkit-scrollbar {
  display: none;
}

.page-news .filter-btn {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 18px;
  border: 2px solid var(--abyss-500);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--fg-soft);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  transition: border-color 160ms var(--ease), color 160ms var(--ease), background-color 160ms var(--ease);
}

.page-news .filter-btn:hover {
  border-color: var(--mist);
  color: var(--fg);
}

.page-news .filter-btn[aria-pressed="true"] {
  border-color: var(--neon);
  color: var(--neon);
  background: rgba(63, 227, 210, 0.08);
}

.page-news .filter-count {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--slate);
}

.page-news .filter-btn[aria-pressed="true"] .filter-count {
  color: var(--neon);
}

.page-news .filter-empty {
  padding: 28px 0;
  color: var(--slate);
  font-size: 15px;
  line-height: 1.7;
}

.page-news .news-feed {
  border-bottom: 1px solid var(--abyss-500);
}

.page-news .feed-item {
  border-top: 1px solid var(--abyss-500);
}

.page-news .feed-item.is-filtered {
  display: none;
}

.page-news .feed-item summary {
  display: grid;
  grid-template-columns: 40px 1fr 22px;
  gap: 14px;
  padding: 22px 0;
  list-style: none;
  cursor: pointer;
}

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

.page-news .feed-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 2px solid var(--abyss-500);
  border-radius: var(--radius-card);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--neon);
  transition: border-color 160ms var(--ease), transform 220ms var(--ease);
}

.page-news .feed-item details[open] .feed-num {
  border-color: var(--neon);
  transform: translateY(-2px);
}

.page-news .feed-main {
  display: block;
  min-width: 0;
}

.page-news .feed-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  margin-bottom: 8px;
}

.page-news .tag {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 0 10px;
  border: 1px solid var(--neon);
  border-radius: var(--radius-pill);
  color: var(--neon);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.page-news .tag--info {
  border-color: var(--abyss-500);
  color: var(--mist);
}

.page-news .feed-time {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--slate);
  white-space: nowrap;
}

.page-news .feed-time::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--abyss-500);
}

.page-news .feed-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.42;
  letter-spacing: -0.01em;
  color: var(--fg);
}

.page-news .feed-summary {
  display: block;
  margin-top: 6px;
  color: var(--fg-soft);
  font-size: 15px;
  line-height: 1.7;
}

.page-news .feed-toggle {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 10px;
}

.page-news .feed-toggle::before {
  content: "+";
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--slate);
  transition: color 160ms var(--ease);
}

.page-news .feed-item details[open] .feed-toggle::before {
  content: "−";
  color: var(--neon);
}

.page-news .feed-detail {
  padding: 0 0 26px;
  color: var(--fg-soft);
  font-size: 15px;
  line-height: 1.78;
}

.page-news .feed-detail p {
  margin: 0 0 12px;
}

.page-news .feed-detail p:last-child {
  margin-bottom: 0;
}

.page-news .feed-rel {
  color: var(--slate);
  font-size: 14px;
}

.page-news .feed-rel a {
  color: var(--neon);
  text-decoration: underline;
  text-underline-offset: 3px;
}

@media (min-width: 700px) {
  .page-news .feed-item summary {
    grid-template-columns: 48px 1fr 26px;
    gap: 22px;
    padding: 26px 0;
  }

  .page-news .feed-num {
    width: 48px;
    height: 48px;
  }

  .page-news .feed-title {
    font-size: 20px;
  }

  .page-news .feed-detail {
    padding-left: 70px;
  }
}

/* ---------- 02 三个系列 ---------- */
.page-news .series-zone {
  padding: 56px 0;
  background: var(--paper);
  border-top: 2px solid var(--ink);
  color: var(--ink);
}

.page-news .series-zone .section-title {
  color: var(--ink);
}

.page-news .series-zone .section-lead {
  color: var(--ink-soft);
}

@media (min-width: 900px) {
  .page-news .series-zone {
    padding: 84px 0;
  }
}

.page-news .series-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-news .series-card {
  display: flex;
  flex-direction: column;
  background: var(--paper-soft);
  border: 2px solid var(--ink);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-hard-paper);
  overflow: hidden;
  transition: transform 260ms var(--ease), box-shadow 260ms var(--ease);
}

.page-news .series-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: 9px 9px 0 0 var(--ink);
}

.page-news .series-media img {
  display: block;
  width: 100%;
  aspect-ratio: 8 / 5;
  object-fit: cover;
  border-bottom: 2px solid var(--ink);
}

.page-news .series-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 22px;
}

.page-news .series-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.page-news .series-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--abyss-700);
}

.page-news .series-spark {
  flex: 0 0 auto;
  width: 78px;
  height: 12px;
}

.page-news .series-spark--neon {
  color: #1FA99B;
}

.page-news .series-spark--amber {
  color: #D96A1F;
}

.page-news .series-spark--mist {
  color: #6E8497;
}

.page-news .series-title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-news .series-desc {
  margin: 12px 0 0;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.76;
}

.page-news .series-list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
}

.page-news .series-list li {
  padding: 12px 0;
  border-top: 1px solid var(--news-hair-ink);
  color: var(--ink-soft);
  font-size: 14.5px;
  line-height: 1.66;
}

.page-news .series-list li:last-child {
  border-bottom: 1px solid var(--news-hair-ink);
}

.page-news .series-time {
  display: block;
  margin-bottom: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--slate);
}

.page-news .series-link {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  gap: 8px;
  min-height: 48px;
  margin-top: 18px;
  color: var(--abyss-700);
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  border-bottom: 2px solid var(--abyss-700);
}

.page-news .series-link::after {
  content: "→";
  font-family: var(--font-mono);
}

.page-news .series-link:hover {
  color: var(--ink);
  border-bottom-color: var(--amber);
}

@media (min-width: 860px) {
  .page-news .series-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    align-items: start;
  }

  .page-news .series-card:nth-child(2) {
    margin-top: 20px;
  }

  .page-news .series-card:nth-child(3) {
    margin-top: 42px;
  }

  .page-news .series-body {
    padding: 26px;
  }
}

/* ---------- 03 标签 ---------- */
.page-news .tags-zone {
  padding: 56px 0;
  background: var(--abyss-900);
  border-top: 2px solid var(--abyss-500);
}

@media (min-width: 900px) {
  .page-news .tags-zone {
    padding: 84px 0;
  }
}

.page-news .tag-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-news .tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-content: flex-start;
}

.page-news .tag-chip {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 48px;
  padding: 0 18px;
  border: 2px solid var(--abyss-500);
  border-radius: var(--radius-pill);
  color: var(--fg);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: border-color 160ms var(--ease), color 160ms var(--ease), transform 180ms var(--ease);
}

.page-news .tag-chip:hover {
  border-color: var(--neon);
  color: var(--neon);
  transform: translateY(-2px);
}

.page-news .tag-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--slate);
}

.page-news .tag-chip:hover .tag-num {
  color: var(--neon);
}

.page-news .tag-note h3 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  color: var(--fg);
}

.page-news .tag-note p {
  margin: 0 0 14px;
  color: var(--fg-soft);
  font-size: 15px;
  line-height: 1.78;
}

.page-news .tag-note p:last-child {
  margin-bottom: 0;
  color: var(--mist);
}

@media (min-width: 900px) {
  .page-news .tag-layout {
    grid-template-columns: 5fr 7fr;
    gap: 56px;
    align-items: start;
  }

  .page-news .tag-cloud {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
}

/* ---------- 04 更新提示 ---------- */
.page-news .subscribe-zone {
  padding: 56px 0;
  background: var(--paper);
  border-top: 2px solid var(--ink);
  color: var(--ink);
}

.page-news .subscribe-zone .section-title {
  color: var(--ink);
}

.page-news .subscribe-zone .section-lead {
  color: var(--ink-soft);
}

@media (min-width: 900px) {
  .page-news .subscribe-zone {
    padding: 84px 0;
  }
}

.page-news .subscribe-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-news .sub-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 24px;
  background: var(--paper-soft);
  border: 2px solid var(--ink);
  border-radius: var(--radius-card);
  box-shadow: 4px 4px 0 0 var(--ink);
}

.page-news .sub-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  color: var(--ink);
}

.page-news .sub-card p {
  flex: 1;
  margin: 0;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.74;
}

.page-news .sub-card .btn {
  align-self: flex-start;
  margin-top: 6px;
}

@media (min-width: 760px) {
  .page-news .subscribe-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
}

@media (min-width: 1120px) {
  .page-news .subscribe-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-news .filter-btn,
  .page-news .feed-num,
  .page-news .feed-toggle::before,
  .page-news .series-card,
  .page-news .tag-chip {
    transition: none;
  }

  .page-news .series-card:hover,
  .page-news .tag-chip:hover,
  .page-news .feed-item details[open] .feed-num {
    transform: none;
  }
}