.page-news {
  --news-line: rgba(0, 255, 159, 0.18);
  --news-line-purple: rgba(181, 55, 242, 0.30);
  --news-glow-green: rgba(0, 255, 159, 0.50);
  --news-glow-cyan: rgba(0, 212, 255, 0.40);
  position: relative;
  overflow-x: hidden;
}

.page-news::before,
.page-news::after {
  content: '';
  position: absolute;
  z-index: -1;
  border-radius: 50%;
  pointer-events: none;
}

.page-news::before {
  top: -80px;
  right: -60px;
  width: 480px;
  height: 480px;
  background: radial-gradient(circle, rgba(181, 55, 242, 0.16) 0%, transparent 70%);
}

.page-news::after {
  top: 760px;
  left: -120px;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(0, 255, 159, 0.09) 0%, transparent 70%);
}

.page-news .page-head__grid {
  display: grid;
  gap: 1.5rem;
  margin-top: 2rem;
}

.page-news .page-title {
  margin-bottom: 0.6rem;
}

.page-news .page-head__coord {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem 1.25rem;
  padding: 1rem 1.25rem;
  background: linear-gradient(120deg, rgba(0, 255, 159, 0.08), rgba(181, 55, 242, 0.06));
  border-left: 2px solid var(--c-green);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-family: var(--font-head);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  color: var(--c-text-dim);
}

.page-news .page-head__serial {
  color: var(--c-cyan);
  font-weight: 700;
}

.page-news .section-heading {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.4rem 1.25rem;
  margin-bottom: 1.5rem;
}

.page-news .section-heading .legend-label {
  margin-bottom: 0;
}

.page-news .section-heading__note {
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  color: var(--c-text-faint);
}

.page-news .news-filter-bar {
  display: flex;
  gap: 0.55rem;
  overflow-x: auto;
  padding-bottom: 0.75rem;
  margin-bottom: 1.5rem;
  scrollbar-width: none;
}

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

.page-news .news-filter-bar .btn-filter {
  flex-shrink: 0;
  white-space: nowrap;
  font-family: var(--font-body);
  font-size: 0.84rem;
  padding: 0.45rem 1.1rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.10);
  background: rgba(255, 255, 255, 0.04);
  color: var(--c-text-dim);
  cursor: pointer;
  transition: all 0.3s var(--ease);
}

.page-news .news-filter-bar .btn-filter:hover {
  border-color: rgba(0, 255, 159, 0.60);
  color: var(--c-text);
  background: rgba(0, 255, 159, 0.06);
}

.page-news .news-filter-bar .btn-filter.is-active {
  background: var(--c-green);
  color: var(--c-deep);
  border-color: var(--c-green);
  font-weight: 700;
  box-shadow: 0 0 16px var(--news-glow-green);
}

.page-news .stream-media {
  max-width: 880px;
  margin-bottom: 1.5rem;
  transform: rotate(-0.6deg);
}

.page-news .news-stream {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--news-line);
  margin-top: 0.5rem;
}

.page-news .news-item {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.6rem;
  padding: 1.4rem 1rem 1.4rem 1.2rem;
  border-bottom: 1px solid var(--news-line);
  background: linear-gradient(90deg, rgba(0, 255, 159, 0.03), transparent 55%);
  transition: background 0.35s var(--ease), border-color 0.35s var(--ease);
}

.page-news .news-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 3px;
  background: var(--c-green);
  box-shadow: 0 0 12px var(--news-glow-green);
  opacity: 0;
  transform: scaleY(0.4);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
}

.page-news .news-item:hover {
  border-color: var(--news-line-purple);
  background: linear-gradient(90deg, rgba(0, 255, 159, 0.10), rgba(181, 55, 242, 0.06) 85%);
}

.page-news .news-item:hover::before {
  opacity: 1;
  transform: scaleY(1);
}

.page-news .news-item__time {
  justify-self: start;
  font-family: var(--font-head);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-green);
  padding: 0.2rem 0.6rem;
  border-left: 2px solid var(--c-green);
  background: rgba(0, 255, 159, 0.06);
}

.page-news .news-item__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.35rem;
}

.page-news .news-item__version {
  font-family: var(--font-head);
  font-size: 0.70rem;
  font-weight: 700;
  letter-spacing: 0.10em;
  color: var(--c-cyan);
  background: rgba(0, 212, 255, 0.10);
  border: 1px solid rgba(0, 212, 255, 0.30);
  border-radius: 999px;
  padding: 0.14rem 0.6rem;
}

.page-news .news-tag {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  border-radius: 999px;
  padding: 0.14rem 0.6rem;
  border: 1px solid;
}

.page-news .news-tag--feature {
  color: var(--c-green);
  border-color: rgba(0, 255, 159, 0.40);
  background: rgba(0, 255, 159, 0.08);
}

.page-news .news-tag--optimize {
  color: var(--c-cyan);
  border-color: rgba(0, 212, 255, 0.40);
  background: rgba(0, 212, 255, 0.08);
}

.page-news .news-tag--bugfix {
  color: var(--c-purple);
  border-color: rgba(181, 55, 242, 0.40);
  background: rgba(181, 55, 242, 0.08);
}

.page-news .news-tag--event {
  color: var(--c-text);
  border-color: rgba(240, 244, 255, 0.30);
  background: rgba(240, 244, 255, 0.06);
}

.page-news .news-item__title {
  font-family: var(--font-head);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--c-text);
  margin: 0 0 0.3rem;
}

.page-news .news-item__desc {
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--c-text-dim);
  margin: 0;
}

.page-news .news-item__detail {
  margin-top: 0.65rem;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--c-text-dim);
  border-left: 2px solid var(--news-line-purple);
  padding-left: 0.8rem;
}

.page-news .news-item__detail summary {
  cursor: pointer;
  list-style: none;
  color: var(--c-cyan);
  font-weight: 600;
  font-size: 0.84rem;
  user-select: none;
}

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

.page-news .news-item__detail summary::before {
  content: '＋';
  display: inline-block;
  margin-right: 0.4rem;
  color: var(--c-green);
  font-weight: 700;
}

.page-news .news-item__detail[open] summary::before {
  content: '－';
}

.page-news .news-item__detail p {
  margin: 0.5rem 0 0;
}

.page-news .news-item__detail p a {
  color: var(--c-green);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 255, 159, 0.40);
  margin-left: 0.5rem;
}

.page-news .news-item__media {
  max-width: 480px;
  margin-top: 0.8rem;
}

.page-news .news-history-section {
  margin-top: 1rem;
}

.page-news .history-intro {
  max-width: 58ch;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--c-text-dim);
  margin: 0 0 1.8rem;
}

.page-news .history-intro a {
  color: var(--c-green);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 255, 159, 0.40);
  white-space: nowrap;
}

.page-news .version-timeline {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

.page-news .version-timeline::before {
  content: '';
  position: absolute;
  left: 4px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--c-green), var(--c-purple), var(--c-cyan));
  opacity: 0.45;
}

.page-news .timeline-item {
  position: relative;
  padding: 0.85rem 0;
}

.page-news .timeline-item__dot {
  position: absolute;
  left: -1.5rem;
  top: 1.35rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--c-green);
  box-shadow: 0 0 12px var(--news-glow-green);
}

.page-news .timeline-item__year {
  font-family: var(--font-head);
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--c-text);
  letter-spacing: 0.04em;
  line-height: 1.3;
}

.page-news .timeline-item__content {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--c-text-dim);
  max-width: 56ch;
  margin-top: 0.2rem;
}

.page-news .timeline-media {
  max-width: 780px;
  margin: 2rem auto 0;
}

.page-news .news-links-section {
  margin-top: 1.5rem;
}

.page-news .news-links-panel {
  display: grid;
  gap: 1.5rem;
  padding: 1.75rem 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.10);
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(0, 255, 159, 0.06), rgba(181, 55, 242, 0.06)), var(--c-glass);
}

.page-news .news-links-panel .legend-label {
  margin-bottom: 0.4rem;
}

.page-news .news-links-title {
  font-family: var(--font-head);
  font-size: 1.30rem;
  font-weight: 700;
  color: var(--c-text);
  margin: 0;
  letter-spacing: 0.02em;
}

.page-news .news-links-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.page-news [data-filter-container] [data-filter-group][hidden] {
  display: none !important;
}

@media (min-width: 768px) {
  .page-news .page-head__grid {
    grid-template-columns: 1fr auto;
    align-items: end;
    gap: 2rem;
  }

  .page-news .page-head__coord {
    max-width: 340px;
  }

  .page-news .news-item {
    grid-template-columns: 120px 1fr;
    gap: 1.5rem;
    padding-left: 1.5rem;
  }

  .page-news .news-item__time {
    justify-self: start;
    padding: 0.3rem 0.8rem;
  }

  .page-news .news-item__body {
    min-width: 0;
  }

  .page-news .version-timeline {
    padding-left: 2rem;
  }

  .page-news .version-timeline::before {
    left: 6px;
  }

  .page-news .timeline-item {
    display: grid;
    grid-template-columns: 110px 1fr;
    gap: 2rem;
    padding: 1rem 0;
  }

  .page-news .timeline-item__dot {
    left: -2rem;
    top: 1.5rem;
  }

  .page-news .news-links-panel {
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 2rem;
    padding: 2rem 2.25rem;
  }

  .page-news .news-links-title {
    font-size: 1.45rem;
  }
}

@media (min-width: 1024px) {
  .page-news .stream-media {
    margin-bottom: 2rem;
  }

  .page-news .news-item {
    padding-left: 1.75rem;
  }
}