.page-news {
  --news-border: 2px solid var(--c-steel);
  --news-panel-bg: rgba(13, 23, 48, 0.62);
  --news-hover-bg: rgba(13, 23, 48, 0.78);
  display: block;
}

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

/* ---------------- 面包屑 ---------------- */
.page-news .news-crumbs {
  padding-top: clamp(20px, 4vw, 36px);
}

.page-news .news-crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-news .news-crumbs li {
  display: inline-flex;
  align-items: center;
}

.page-news .news-crumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--c-steel);
}

.page-news .news-crumbs a {
  color: var(--c-mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.24s ease, border-color 0.24s ease;
}

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

.page-news .news-crumbs [aria-current="page"] {
  color: var(--c-orange);
}

/* ---------------- 首屏 ---------------- */
.page-news .news-hero {
  position: relative;
  padding-top: clamp(26px, 5vw, 54px);
  padding-bottom: clamp(44px, 8vw, 92px);
}

.page-news .news-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: min(50%, 620px);
  height: 300px;
  background: var(--grad-band);
  clip-path: polygon(36% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
  z-index: 0;
}

.page-news .hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(28px, 5vw, 56px);
  align-items: start;
}

.page-news .hero-copy h1 {
  margin: 14px 0 0;
  max-width: 16ch;
  font-size: clamp(30px, 5.4vw, 54px);
  line-height: 1.08;
  letter-spacing: -0.022em;
  font-weight: 800;
  color: var(--c-paper);
}

.page-news .hero-lead {
  margin: 22px 0 0;
  max-width: 48ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--c-mist);
}

.page-news .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-news .hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(108px, 1fr));
  gap: 18px;
  margin: 34px 0 0;
  padding-top: 24px;
  border-top: 1px solid var(--c-steel);
}

.page-news .hero-stats > div {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-news .hero-stats dt {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-mist);
}

.page-news .hero-stats dd {
  margin: 0;
  font-size: 22px;
  font-weight: 700;
  color: var(--c-cyan);
}

.page-news .hero-visual {
  position: relative;
  margin: 0;
  border: var(--news-border);
  background: var(--c-deep);
  box-shadow: 10px 10px 0 rgba(139, 92, 246, 0.26);
}

.page-news .hero-visual::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--grad-brand);
  z-index: 2;
}

.page-news .hero-visual img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

/* ---------------- 本期头条 ---------------- */
.page-news .headline-panel {
  position: relative;
  padding: clamp(22px, 4vw, 48px);
  border: var(--news-border);
  background: linear-gradient(140deg, rgba(47, 224, 224, 0.09) 0%, rgba(139, 92, 246, 0.1) 58%, rgba(6, 11, 24, 0) 100%);
  overflow: hidden;
}

.page-news .headline-panel::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 4px;
  background: var(--grad-brand);
}

.page-news .headline-idx {
  position: absolute;
  top: 16px;
  right: 22px;
  padding: 4px 9px;
  border: 1px solid var(--c-steel);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--c-violet);
  pointer-events: none;
}

.page-news h2 {
  margin: 12px 0 0;
  font-size: clamp(22px, 3.4vw, 34px);
  line-height: 1.22;
  letter-spacing: -0.015em;
  font-weight: 800;
  color: var(--c-paper);
}

.page-news .headline-panel > p:not(.eyebrow) {
  margin: 18px 0 0;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-mist);
}

.page-news .headline-panel a {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 224, 224, 0.45);
  transition: color 0.24s ease, border-color 0.24s ease;
}

.page-news .headline-panel a:hover {
  color: var(--c-orange);
  border-bottom-color: var(--c-orange);
}

.page-news .headline-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 26px;
}

.page-news .headline-time {
  margin-left: auto;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--c-mist);
}

/* ---------------- 主题标签带 ---------------- */
.page-news .news-topics {
  padding-top: clamp(6px, 2vw, 14px);
}

.page-news .topic-band {
  position: relative;
  padding: clamp(28px, 5vw, 58px) 0;
  border-top: var(--news-border);
  border-bottom: var(--news-border);
  background: var(--c-deep);
  overflow: hidden;
}

.page-news .topic-band > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.22;
  pointer-events: none;
}

.page-news .topic-band .shell {
  position: relative;
  z-index: 1;
}

.page-news .topic-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-news .topic-pills li {
  padding: 8px 16px;
  border: 1px solid var(--c-steel);
  border-radius: 999px;
  background: rgba(6, 11, 24, 0.68);
  font-size: 14px;
  letter-spacing: 0.02em;
  color: var(--c-paper);
  transition: border-color 0.26s ease, color 0.26s ease, background-color 0.26s ease;
}

.page-news .topic-pills li:hover {
  border-color: var(--c-cyan);
  color: var(--c-cyan);
  background: rgba(47, 224, 224, 0.08);
}

/* ---------------- 更新列表 ---------------- */
.page-news .updates-head {
  display: grid;
  gap: 14px;
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-news .updates-note {
  margin: 0;
  max-width: 42ch;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-mist);
}

.page-news .update-list {
  max-width: 940px;
  border-top: 1px solid var(--c-steel);
}

.page-news .update-item {
  position: relative;
  border-bottom: 1px solid var(--c-steel);
  transition: background-color 0.26s ease;
}

.page-news .update-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 3px;
  background: var(--grad-brand);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform 0.3s ease;
}

.page-news .update-item:hover,
.page-news .update-item[open] {
  background: var(--news-hover-bg);
}

.page-news .update-item:hover::before,
.page-news .update-item[open]::before {
  transform: scaleY(1);
}

.page-news .update-summary {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 18px 46px 18px 20px;
  cursor: pointer;
  list-style: none;
}

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

.page-news .update-summary::after {
  content: "";
  position: absolute;
  right: 22px;
  top: 50%;
  width: 9px;
  height: 9px;
  margin-top: -6px;
  border-right: 2px solid var(--c-mist);
  border-bottom: 2px solid var(--c-mist);
  transform: rotate(45deg);
  transition: transform 0.28s ease, border-color 0.28s ease;
}

.page-news .update-item[open] .update-summary::after {
  transform: rotate(-135deg);
  border-color: var(--c-orange);
}

.page-news .update-tag {
  grid-column: 1;
  grid-row: 1;
  justify-self: start;
  padding: 3px 9px;
  border: 1px solid var(--c-steel);
  background: rgba(47, 224, 224, 0.06);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--c-cyan);
}

.page-news .update-text {
  grid-column: 1;
  grid-row: 2;
  font-size: 16px;
  line-height: 1.62;
  color: var(--c-paper);
}

.page-news .update-time {
  grid-column: 1;
  grid-row: 3;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-violet);
}

.page-news .update-body {
  padding: 0 46px 20px 20px;
}

.page-news .update-body p {
  margin: 0;
  max-width: 70ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-mist);
}

/* ---------------- 测试版内容通道 ---------------- */
.page-news .beta-grid {
  display: grid;
  gap: clamp(26px, 4vw, 56px);
  align-items: center;
}

.page-news .beta-figure {
  margin: 0;
  border: var(--news-border);
  box-shadow: -8px 8px 0 rgba(47, 224, 224, 0.2);
}

.page-news .beta-figure img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-news .beta-copy > p:not(.eyebrow) {
  margin: 18px 0 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-mist);
}

.page-news .beta-points {
  display: grid;
  gap: 14px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-news .beta-points li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  font-size: 15px;
  line-height: 1.72;
  color: var(--c-mist);
}

.page-news .beta-points .mono {
  padding-top: 3px;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--c-violet);
}

.page-news .beta-copy .btn {
  margin-top: 28px;
}

/* ---------------- 专题系列 ---------------- */
.page-news .series-head {
  display: grid;
  gap: 22px;
  margin-bottom: clamp(22px, 3vw, 36px);
}

.page-news .series-intro {
  margin: 16px 0 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-mist);
}

.page-news .series-figure {
  margin: 0;
  border: var(--news-border);
}

.page-news .series-figure img {
  display: block;
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-news .series-list {
  display: grid;
  border-top: 1px solid var(--c-steel);
}

.page-news .series-row {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 22px 6px;
  border-bottom: 1px solid var(--c-steel);
  transition: background-color 0.26s ease;
}

.page-news .series-row:hover {
  background: var(--news-panel-bg);
}

.page-news .series-num {
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--c-orange);
}

.page-news .series-row h3 {
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--c-paper);
}

.page-news .series-row p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.72;
  color: var(--c-mist);
}

.page-news .series-freq {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-cyan);
  white-space: nowrap;
}

/* ---------------- 更新节奏 ---------------- */
.page-news .cadence-grid {
  display: grid;
  gap: clamp(26px, 4vw, 56px);
}

.page-news .cadence-lead {
  margin: 18px 0 0;
  max-width: 52ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-mist);
}

.page-news .cadence-list {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-news .cadence-list li {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 18px;
  border: 1px solid var(--c-steel);
  background: var(--news-panel-bg);
  transition: border-color 0.26s ease, box-shadow 0.26s ease;
}

.page-news .cadence-list li:hover {
  border-color: var(--c-cyan);
  box-shadow: 4px 4px 0 rgba(47, 224, 224, 0.2);
}

.page-news .cadence-list .mono {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--c-cyan);
}

.page-news .cadence-list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--c-mist);
}

/* ---------------- 订阅与回顾 ---------------- */
.page-news .subscribe-panel {
  position: relative;
  padding: clamp(24px, 4vw, 52px);
  border: var(--news-border);
  background: linear-gradient(120deg, rgba(139, 92, 246, 0.14) 0%, rgba(47, 224, 224, 0.07) 72%);
  overflow: hidden;
}

.page-news .subscribe-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 4px;
  background: var(--grad-brand);
}

.page-news .subscribe-panel > p:not(.eyebrow) {
  margin: 18px 0 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-mist);
}

.page-news .subscribe-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

/* ---------------- 响应式增强 ---------------- */
@media (min-width: 720px) {
  .page-news .update-summary {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    column-gap: 22px;
    padding-right: 54px;
  }

  .page-news .update-time {
    grid-column: 2;
    grid-row: 1 / span 2;
    align-self: center;
    text-align: right;
    color: var(--c-mist);
  }

  .page-news .series-row {
    grid-template-columns: 64px minmax(0, 1fr) auto;
    gap: 8px 24px;
    align-items: baseline;
  }

  .page-news .series-num {
    grid-column: 1;
    grid-row: 1 / span 2;
    align-self: start;
  }

  .page-news .series-row h3 {
    grid-column: 2;
    grid-row: 1;
  }

  .page-news .series-row p {
    grid-column: 2;
    grid-row: 2;
  }

  .page-news .series-freq {
    grid-column: 3;
    grid-row: 1;
    justify-self: end;
  }
}

@media (min-width: 900px) {
  .page-news .hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

  .page-news .hero-visual {
    margin-top: 30px;
  }

  .page-news .beta-grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  }

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

  .page-news .updates-head {
    grid-template-columns: minmax(0, 1fr) minmax(0, 320px);
    align-items: end;
    gap: 40px;
  }

  .page-news .series-head {
    grid-template-columns: minmax(0, 1fr) minmax(0, 360px);
    align-items: center;
    gap: 48px;
  }
}

@media (min-width: 1180px) {
  .page-news .news-hero::before {
    height: 360px;
  }
}