.page-news {
  --news-gap: 20px;
  --news-radius: 16px;
  --news-accent-glow: rgba(255, 107, 53, 0.32);
  --news-card-bg: linear-gradient(145deg, rgba(11, 30, 58, 0.88), rgba(10, 10, 26, 0.92));
  --news-guide-bg: linear-gradient(135deg, rgba(123, 44, 191, 0.2), rgba(255, 107, 53, 0.14));
}

.page-news .breadcrumb {
  padding-top: calc(var(--header-height) + 24px);
  margin-bottom: 24px;
}

.page-news .breadcrumb ol {
  gap: 8px;
}

.page-news .page-hero {
  position: relative;
  display: grid;
  gap: 28px;
  margin-bottom: 48px;
}

.page-news .page-hero__tagline {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.18em;
  color: var(--color-accent);
  text-transform: uppercase;
}

.page-news .page-hero__title {
  margin: 0 0 16px;
  font-size: 2.4rem;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-white);
}

.page-news .page-hero__lede {
  max-width: 440px;
  margin: 0 0 24px;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.page-news .page-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-news .page-hero__visual {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-purple));
}

.page-news .page-hero__visual img {
  display: block;
  width: 100%;
  height: auto;
  min-height: 180px;
  object-fit: cover;
}

.page-news .news-index {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 56px;
}

.page-news .news-index__item {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  background: rgba(11, 30, 58, 0.6);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-sm);
}

.page-news .news-index__num {
  font-size: 0.8125rem;
  color: var(--color-accent);
  line-height: 1;
}

.page-news .news-index__link {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-white);
  text-decoration: none;
  transition: color 0.3s ease;
}

.page-news .news-index__link:hover {
  color: var(--color-accent);
}

.page-news .section {
  margin-bottom: 64px;
}

.page-news .section__tag {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  text-transform: uppercase;
}

.page-news .section-title {
  margin: 0 0 8px;
  font-size: 2rem;
  color: var(--color-white);
}

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

.page-news .news-filter__input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-news .news-filter {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  overflow-x: auto;
  padding: 4px 0 16px;
  margin-bottom: 20px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-news .news-filter__label {
  flex: 0 0 auto;
  padding: 8px 18px;
  font-family: var(--font-body);
  font-size: 0.875rem;
  line-height: 1.4;
  color: var(--color-text-secondary);
  background: rgba(11, 30, 58, 0.55);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  cursor: pointer;
  user-select: none;
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

.page-news .news-filter__label:hover {
  border-color: var(--color-accent);
  color: var(--color-white);
}

.page-news #newsAll:checked ~ .news-filter label[for="newsAll"],
.page-news #newsVersion:checked ~ .news-filter label[for="newsVersion"],
.page-news #newsGuide:checked ~ .news-filter label[for="newsGuide"],
.page-news #newsNotice:checked ~ .news-filter label[for="newsNotice"] {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-white);
  font-weight: 600;
}

.page-news #newsVersion:checked ~ .news-grid--filterable .news-card:not([data-category="version"]),
.page-news #newsGuide:checked ~ .news-grid--filterable .news-card:not([data-category="guide"]),
.page-news #newsNotice:checked ~ .news-grid--filterable .news-card:not([data-category="notice"]) {
  display: none;
}

.page-news .news-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--news-gap);
}

.page-news .news-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 22px;
  background: var(--news-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--news-radius);
  transition: transform 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}

.page-news .news-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.36);
}

.page-news .news-card--featured {
  border-color: var(--news-accent-glow);
  box-shadow: 0 0 32px rgba(255, 107, 53, 0.12);
}

.page-news .news-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.page-news .news-card__date {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

.page-news .news-card__title {
  margin: 0;
  font-size: 1.25rem;
  line-height: 1.4;
  color: var(--color-white);
}

.page-news .news-card--featured .news-card__title {
  font-size: 1.5rem;
}

.page-news .news-card__excerpt {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--color-text-secondary);
}

.page-news .news-card__expand {
  border-top: 1px dashed var(--color-border);
  padding-top: 4px;
}

.page-news .news-card__expand summary {
  list-style: none;
  cursor: pointer;
  padding: 10px 0;
  font-size: 0.875rem;
  color: var(--color-accent);
  font-weight: 500;
  transition: color 0.3s ease;
}

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

.page-news .news-card__expand summary::after {
  content: "＋";
  float: right;
  color: var(--color-accent);
  font-weight: 700;
}

.page-news .news-card__expand[open] summary::after {
  content: "－";
}

.page-news .news-card__expand p {
  margin: 0 0 12px;
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--color-text-secondary);
}

.page-news .news-card__footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid rgba(42, 59, 92, 0.6);
}

.page-news .news-card__tag {
  margin-left: auto;
  font-size: 0.8125rem;
  color: var(--color-accent);
}

.page-news .news-callout {
  display: grid;
  gap: 20px;
  margin-top: 40px;
  padding: 20px;
  background: var(--news-guide-bg);
  border: 1px solid rgba(255, 107, 53, 0.28);
  border-radius: var(--radius-lg);
}

.page-news .news-callout img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  display: block;
}

.page-news .news-callout__title {
  margin: 0 0 8px;
  font-size: 1.25rem;
  color: var(--color-white);
}

.page-news .news-callout__desc {
  margin: 0 0 16px;
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--color-text-secondary);
}

.page-news .guides-layout {
  display: grid;
  gap: 24px;
}

.page-news .guides-cover {
  border-radius: var(--news-radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

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

.page-news .guides-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-news .guide-item {
  display: flex;
  gap: 18px;
  padding: 20px 22px;
  background: rgba(11, 30, 58, 0.55);
  border: 1px solid var(--color-border);
  border-radius: var(--news-radius);
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.page-news .guide-item:hover {
  border-color: var(--color-purple-light);
  transform: translateX(4px);
}

.page-news .guide-item__quarter {
  flex: 0 0 auto;
  min-width: 48px;
  padding: 4px 12px;
  height: fit-content;
  text-align: center;
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-accent);
  background: rgba(255, 107, 53, 0.1);
}

.page-news .guide-item__title {
  margin: 0 0 6px;
  font-size: 1.125rem;
  color: var(--color-white);
}

.page-news .guide-item__desc {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
}

.page-news .guides-more {
  align-self: flex-start;
}

.page-news .changelog-layout {
  display: grid;
  gap: 24px;
}

.page-news .version-timeline {
  display: flex;
  gap: 16px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: 16px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-news .version-timeline__item {
  flex: 0 0 260px;
  scroll-snap-align: start;
}

.page-news .version-timeline__version {
  display: inline-block;
  margin-bottom: 12px;
  padding: 4px 14px;
  border-radius: 999px;
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-accent);
  background: rgba(255, 107, 53, 0.12);
}

.page-news .version-timeline__card {
  padding: 22px;
  background: linear-gradient(145deg, rgba(11, 30, 58, 0.85), rgba(22, 41, 77, 0.5));
  border: 1px solid var(--color-border);
  border-radius: var(--news-radius);
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.page-news .version-timeline__item--v4 .version-timeline__card {
  border-color: var(--color-accent);
  box-shadow: 0 0 24px rgba(255, 107, 53, 0.14);
}

.page-news .version-timeline__title {
  margin: 0 0 8px;
  font-size: 1.125rem;
  color: var(--color-white);
}

.page-news .version-timeline__card p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--color-text-secondary);
}

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

.page-news .changelog-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--news-radius);
  border: 1px solid var(--color-border);
}

.page-news .changelog-figure figcaption {
  margin-top: 10px;
  text-align: center;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

@media (min-width: 768px) {
  .page-news .page-hero {
    grid-template-columns: 1fr 1.1fr;
    align-items: center;
    gap: 48px;
  }

  .page-news .page-hero__title {
    font-size: 3.5rem;
  }

  .page-news .page-hero__visual {
    transform: rotate(1.5deg) translateY(8px);
    box-shadow: 0 18px 48px rgba(0, 0, 0, 0.4);
  }

  .page-news .news-filter-region {
    display: grid;
    grid-template-columns: 180px 1fr;
    gap: 24px;
    align-items: start;
  }

  .page-news .news-filter {
    flex-direction: column;
    overflow: visible;
    margin-bottom: 0;
  }

  .page-news .news-filter__label {
    width: 100%;
    text-align: center;
  }

  .page-news .news-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-news .news-card--featured {
    grid-column: 1 / -1;
  }

  .page-news .news-callout {
    grid-template-columns: 1fr 1fr;
    align-items: center;
    padding: 28px;
  }

  .page-news .guides-layout {
    grid-template-columns: 0.8fr 1.2fr;
    align-items: start;
  }

  .page-news .changelog-layout {
    grid-template-columns: 1.6fr 1fr;
    align-items: start;
  }
}

@media (min-width: 1100px) {
  .page-news .news-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-news .news-card--featured {
    grid-column: 1 / -1;
  }

  .page-news .page-hero__visual {
    clip-path: polygon(10% 0, 100% 0, 100% 100%, 0 88%);
    transform: rotate(0deg) translateY(0);
  }
}