.page-news {
  color: var(--c-graphite);
  background: var(--c-paper);
  overflow-x: clip;
}

/* ===== Hero ===== */
.page-news .news-hero {
  position: relative;
  overflow: hidden;
  padding: 2.5rem 0 2.25rem;
  background:
    radial-gradient(circle at 88% 12%, rgba(57, 255, 136, 0.16) 0%, transparent 240px),
    linear-gradient(122deg, var(--c-deep-space) 0%, var(--c-shadow) 72%, var(--c-deep-space) 100%);
  border-bottom: 3px solid var(--c-fluo);
}

.page-news .news-hero::after {
  content: "";
  position: absolute;
  right: -80px;
  top: -70px;
  width: 300px;
  height: 300px;
  background: repeating-linear-gradient(45deg, transparent 0 12px, rgba(192, 200, 208, 0.16) 12px 14px);
  transform: rotate(12deg);
  pointer-events: none;
}

.page-news .news-hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  gap: 1.75rem;
  align-items: end;
}

.page-news .news-hero .breadcrumb {
  position: relative;
  z-index: 2;
  margin-bottom: 2.25rem;
  padding: 0;
}

.page-news .news-hero .breadcrumb li,
.page-news .news-hero .breadcrumb li a {
  color: var(--c-silver);
}

.page-news .news-hero .breadcrumb li a:hover {
  color: var(--c-fluo);
}

.page-news .news-hero .section-label {
  color: var(--c-fluo);
}

.page-news .news-hero h1 {
  margin: 0.5rem 0 1rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.4rem, 5.5vw, 4.2rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--c-paper);
}

.page-news .news-hero-lead {
  max-width: 640px;
  margin: 0;
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--c-silver);
}

.page-news .news-hero-side {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1rem;
}

.page-news .news-rss-card {
  padding: 1rem 1.25rem;
  background: rgba(15, 39, 64, 0.72);
  border: 1px solid var(--c-silver);
  border-left: 4px solid var(--c-fluo);
}

.page-news .rss-chip {
  display: inline-block;
  margin-bottom: 0.6rem;
  padding: 0.2rem 0.5rem;
  border: 1px solid rgba(57, 255, 136, 0.4);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-fluo);
}

.page-news .news-rss-card p {
  margin: 0;
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--c-silver);
}

.page-news .news-hero-side .btn-outline {
  color: var(--c-fluo);
  border-color: var(--c-fluo);
}

@media (min-width: 860px) {
  .page-news .news-hero-grid {
    grid-template-columns: minmax(0, 2fr) minmax(280px, 1fr);
    gap: 3rem;
  }
}

/* ===== 时间线区域 ===== */
.page-news .news-timeline-section {
  position: relative;
  padding: var(--space-6) 0;
}

.page-news .news-timeline-section::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 180px;
  background-image: radial-gradient(circle at 40px 40px, rgba(57, 255, 136, 0.12) 2px, transparent 3px);
  background-size: 80px 80px;
  opacity: 0.5;
  pointer-events: none;
}

.page-news .timeline-intro {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  max-width: 880px;
  margin-bottom: 1.5rem;
}

.page-news .timeline-intro .section-label {
  flex-shrink: 0;
  margin-top: 0.25rem;
}

.page-news .timeline-intro p {
  margin: 0;
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--c-muted);
}

.page-news .timeline-index {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
  margin: 0 0 2.25rem;
  padding: 0;
  list-style: none;
}

.page-news .timeline-index li {
  margin: 0;
}

.page-news .timeline-index a {
  padding: 0.1rem 0;
  border-bottom: 1px solid var(--c-fluo);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-decoration: none;
  color: var(--c-muted);
  transition: color var(--ease-fast);
}

.page-news .timeline-index a:hover,
.page-news .timeline-index a:focus-visible {
  color: var(--c-deep-space);
}

.page-news .timeline-list {
  position: relative;
}

.page-news .timeline-list::before {
  content: "";
  position: absolute;
  left: 27px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--c-fluo) 0%, var(--c-silver) 42%, rgba(192, 200, 208, 0.08) 100%);
}

.page-news .timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 1rem;
  padding-bottom: 2.25rem;
  scroll-margin-top: 5rem;
}

.page-news .timeline-item:last-child {
  padding-bottom: 0;
}

.page-news .timeline-axis {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 1.5rem;
}

.page-news .axis-dot {
  position: relative;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--c-fluo);
  border: 3px solid var(--c-paper);
  box-shadow: 0 0 0 3px rgba(57, 255, 136, 0.45), 0 0 18px rgba(57, 255, 136, 0.45);
}

.page-news .axis-code {
  margin-top: 0.65rem;
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  white-space: nowrap;
  color: var(--c-muted);
}

/* ===== 时间线卡片 ===== */
.page-news .timeline-card {
  position: relative;
  background: #ffffff;
  border: 1px solid var(--c-silver);
  border-top: 3px solid var(--c-deep-space);
  box-shadow: 0 2px 0 rgba(11, 27, 43, 0.04);
  transition: background var(--ease-fast), box-shadow var(--ease-base), transform var(--ease-base);
}

.page-news .timeline-card::after {
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  width: 0;
  height: 0;
  border-top: 22px solid var(--c-deep-space);
  border-left: 22px solid transparent;
  pointer-events: none;
}

.page-news .timeline-card:hover,
.page-news .timeline-card:focus-within {
  background: #eef7ff;
  box-shadow: 0 10px 26px rgba(11, 27, 43, 0.1);
  transform: translateY(-2px);
}

.page-news .timeline-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-news .timeline-body {
  padding: 1.25rem 1.5rem 1.5rem;
}

.page-news .timeline-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.6rem;
}

.page-news .timeline-chip {
  display: inline-block;
  padding: 0.25rem 0.55rem;
  background: var(--c-deep-space);
  color: var(--c-fluo);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.page-news .timeline-version {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--c-muted);
}

.page-news .timeline-body h2 {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.3rem, 2.2vw, 1.75rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--c-deep-space);
}

.page-news .timeline-summary {
  margin: 0 0 0.75rem;
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--c-muted);
}

.page-news .timeline-full {
  margin-top: 0.4rem;
  padding-top: 0.4rem;
  border-top: 1px dashed var(--c-silver);
}

.page-news .timeline-full summary {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.25rem 0;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--c-data);
}

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

.page-news .timeline-full summary::before {
  content: "+";
  width: 1.1rem;
  height: 1.1rem;
  line-height: 1.1rem;
  text-align: center;
  background: var(--c-deep-space);
  color: var(--c-fluo);
  font-weight: 700;
}

.page-news .timeline-full[open] summary::before {
  content: "–";
}

.page-news .timeline-full p {
  margin: 0.5rem 0 0;
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--c-muted);
}

.page-news .timeline-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin-top: 1rem;
}

.page-news .timeline-links a {
  padding-bottom: 2px;
  border-bottom: 2px solid var(--c-fluo);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.86rem;
  text-decoration: none;
  color: var(--c-deep-space);
  transition: color var(--ease-fast), border-color var(--ease-fast);
}

.page-news .timeline-links a:hover,
.page-news .timeline-links a:focus-visible {
  color: var(--c-data);
  border-color: var(--c-data);
}

/* ===== 后续规划暗色卡片 ===== */
.page-news .timeline-item.is-next .timeline-card {
  background: var(--c-shadow);
  border-top-color: var(--c-fluo);
}

.page-news .timeline-item.is-next .timeline-card::after {
  border-top-color: var(--c-fluo);
}

.page-news .timeline-item.is-next .timeline-chip {
  background: var(--c-fluo);
  color: var(--c-deep-space);
}

.page-news .timeline-item.is-next .timeline-body h2 {
  color: var(--c-paper);
}

.page-news .timeline-item.is-next .timeline-summary {
  color: var(--c-silver);
}

.page-news .timeline-item.is-next .timeline-links a {
  color: var(--c-paper);
}

/* ===== 底部订阅引导 ===== */
.page-news .news-subscribe {
  position: relative;
  overflow: hidden;
  padding: var(--space-5) 0;
  background: linear-gradient(135deg, var(--c-deep-space) 0%, var(--c-shadow) 100%);
  color: var(--c-paper);
  border-top: 1px solid var(--c-fluo);
}

.page-news .news-subscribe::before {
  content: "";
  position: absolute;
  left: 8%;
  bottom: -60px;
  width: 260px;
  height: 260px;
  background: radial-gradient(circle, rgba(57, 255, 136, 0.22) 0%, transparent 70%);
  pointer-events: none;
}

.page-news .news-subscribe-inner {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.5rem;
}

.page-news .news-subscribe h2 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.7rem;
  line-height: 1.2;
}

.page-news .news-subscribe p {
  max-width: 560px;
  margin: 0;
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 0.95rem;
  color: var(--c-silver);
}

@media (min-width: 768px) {
  .page-news .news-subscribe-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

/* ===== 桌面端时间线 ===== */
@media (min-width: 900px) {
  .page-news .news-timeline-section {
    padding: var(--space-7) 0 var(--space-6);
  }

  .page-news .timeline-item {
    grid-template-columns: 180px 56px minmax(0, 1fr);
    gap: 0;
    padding-bottom: 3.25rem;
  }

  .page-news .timeline-axis {
    grid-column: 2 / 3;
    grid-row: 1;
  }

  .page-news .timeline-list::before {
    left: calc(180px + 27px);
  }

  .page-news .axis-code {
    position: absolute;
    top: 18px;
    right: calc(100% + 18px);
    width: 150px;
    text-align: right;
    writing-mode: horizontal-tb;
    font-size: 0.75rem;
    letter-spacing: 0.14em;
    white-space: nowrap;
  }

  .page-news .timeline-body {
    padding: 1.5rem 1.75rem 1.75rem;
  }
}