.page-news {
  --news-issue-size: clamp(64px, 14vw, 140px);
  --news-content-gap: 26px;
  position: relative;
  background: linear-gradient(165deg, #0B1B3D 0%, #0E2149 58%, #0B1B3D 100%);
  color: var(--text-light);
  min-height: 100vh;
  overflow-x: hidden;
}

.page-news .container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.page-news [id] {
  scroll-margin-top: 84px;
}

.page-news .section {
  padding: 28px 0 36px;
}

.page-news .section-head {
  display: flex;
  align-items: flex-end;
  gap: 14px;
  margin-bottom: 22px;
}

.page-news .chapter-index {
  font-family: var(--font-display);
  font-size: 44px;
  line-height: 0.9;
  color: var(--accent-orange);
  letter-spacing: 0.04em;
}

.page-news .section-title {
  font-family: var(--font-display);
  font-size: var(--size-section-title);
  margin: 0 0 6px;
  line-height: 1.1;
}

.page-news .section-head__note {
  font-size: var(--size-footnote);
  color: var(--border-blue);
  margin: 0;
}

.page-news [data-reveal] {
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.page-news [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

.page-news .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: var(--size-footnote);
  color: var(--border-blue);
  margin-bottom: 28px;
  position: relative;
  z-index: 1;
}

.page-news .breadcrumb__item {
  color: var(--border-blue);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.page-news .breadcrumb__item--current {
  color: var(--accent-orange);
}

.page-news .breadcrumb__sep {
  opacity: 0.5;
}

.page-news .news-hero {
  position: relative;
  padding: 32px 0 20px;
  overflow: hidden;
}

.page-news .news-hero::before {
  content: "";
  position: absolute;
  right: -80px;
  top: -80px;
  width: 240px;
  height: 240px;
  border: 1px solid rgba(255, 107, 0, 0.28);
  transform: rotate(45deg);
  pointer-events: none;
}

.page-news .news-hero::after {
  content: "10・24";
  position: absolute;
  right: -24px;
  bottom: -52px;
  font-family: var(--font-mono);
  font-size: 20vw;
  line-height: 1;
  color: rgba(255, 255, 255, 0.04);
  white-space: nowrap;
  pointer-events: none;
  z-index: 0;
}

.page-news .news-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-news .news-hero__issue {
  background: var(--bg-secondary);
  border-left: 4px solid var(--accent-orange);
  padding: 22px 18px;
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 16px 100%, 0 calc(100% - 16px));
}

.page-news .news-hero__issue-label {
  display: block;
  font-size: 12px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--accent-orange);
}

.page-news .news-hero__issue-num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--news-issue-size);
  line-height: 1;
  letter-spacing: 0.05em;
  color: var(--text-light);
  margin: 8px 0 4px;
  white-space: nowrap;
}

.page-news .news-hero__issue-note {
  display: block;
  font-size: var(--size-footnote);
  color: var(--border-blue);
}

.page-news .news-hero__title {
  font-family: var(--font-display);
  font-size: clamp(30px, 4.6vw, 48px);
  line-height: 1.15;
  letter-spacing: 0.02em;
  margin: 12px 0 16px;
}

.page-news .news-hero__lead {
  font-size: 15px;
  line-height: 1.8;
  color: var(--border-blue);
  margin: 0 0 20px;
  max-width: 620px;
}

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

.page-news .btn--primary {
  display: inline-block;
  background: var(--accent-orange);
  color: #fff;
  padding: 10px 20px;
  font-weight: 600;
  border-radius: 4px;
  text-decoration: none;
  transition: background 0.2s ease, transform 0.2s ease;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
}

.page-news .btn--primary:hover {
  background: var(--accent-orange-light);
  transform: translateY(-2px);
}

.page-news .news-hero__fav {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(17, 38, 79, 0.6);
  border: 1px solid var(--border-light);
  color: var(--text-light);
  padding: 9px 16px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  font-size: 14px;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.page-news .news-hero__fav:hover {
  border-color: var(--accent-orange);
  color: var(--accent-orange);
}

.page-news .section-map {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 auto 24px;
  padding: 10px 24px;
  max-width: var(--container-width);
  background: rgba(17, 38, 79, 0.5);
  border: 1px solid var(--border-light);
  position: relative;
  z-index: 2;
}

.page-news .section-map__link {
  font-size: 13px;
  color: var(--border-blue);
  text-decoration: none;
  padding: 4px 10px;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-news .section-map__link:hover {
  color: var(--text-light);
}

.page-news .section-map__link.is-active {
  color: var(--accent-orange);
  border-bottom-color: var(--accent-orange);
}

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

.page-news .latest__copy p,
.page-news .rhythm__copy p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--border-blue);
}

.page-news .latest__copy strong {
  color: var(--accent-cyan);
  font-weight: 700;
}

.page-news .inline-strong {
  font-family: var(--font-mono);
  font-style: normal;
  color: var(--text-light);
  font-weight: 600;
}

.page-news .inline-strong--cyan {
  color: var(--accent-cyan);
}

.page-news .text-link {
  color: var(--accent-orange);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 107, 0, 0.3);
  padding-bottom: 2px;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-news .text-link:hover {
  color: var(--accent-orange-light);
  border-color: var(--accent-orange-light);
}

.page-news .path-visual {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 6px 0 20px;
  padding: 12px 14px;
  background: rgba(17, 38, 79, 0.5);
  border: 1px dashed var(--border-blue);
}

.page-news .path-visual__step {
  min-width: 64px;
  padding: 4px 8px;
  text-align: center;
  background: rgba(255, 107, 0, 0.12);
  color: var(--accent-orange);
  font-family: var(--font-mono);
  font-size: 18px;
}

.page-news .path-visual__step--end {
  background: rgba(0, 194, 209, 0.12);
  color: var(--accent-cyan);
}

.page-news .path-visual svg {
  flex: 0 0 auto;
}

.page-news figure {
  margin: 0;
}

.page-news figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
}

.page-news .figure-caption {
  margin-top: 8px;
  font-size: 12px;
  color: var(--border-blue);
  text-align: left;
}

.page-news .updates-box {
  position: relative;
}

.page-news .updates-main {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-news .filter-target {
  position: absolute;
  top: 8px;
  left: 0;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-news .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
  padding: 10px;
  background: rgba(17, 38, 79, 0.55);
  border: 1px solid var(--border-light);
  position: relative;
  z-index: 1;
}

.page-news .filter-link {
  padding: 6px 14px;
  border: 1px solid var(--border-light);
  background: transparent;
  color: var(--border-blue);
  font-size: 13px;
  text-decoration: none;
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.page-news .filter-link:hover {
  border-color: var(--accent-orange);
  color: var(--accent-orange);
}

.page-news .filter-link--all {
  border-color: var(--accent-orange);
  color: var(--accent-orange);
}

.page-news #filter-data:target ~ .filter-bar a[href="#filter-data"],
.page-news #filter-feature:target ~ .filter-bar a[href="#filter-feature"],
.page-news #filter-search:target ~ .filter-bar a[href="#filter-search"] {
  background: var(--accent-orange);
  border-color: var(--accent-orange);
  color: #fff;
}

.page-news #filter-data:target ~ .filter-bar .filter-link--all,
.page-news #filter-feature:target ~ .filter-bar .filter-link--all,
.page-news #filter-search:target ~ .filter-bar .filter-link--all {
  border-color: var(--border-light);
  color: var(--border-blue);
}

.page-news .updates-list {
  position: relative;
  z-index: 1;
}

.page-news .update-item {
  display: block;
  border-left: 4px solid transparent;
  border-top: 1px solid var(--border-light);
  border-right: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
  background: rgba(17, 38, 79, 0.45);
  margin-bottom: 10px;
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.page-news .update-item:hover {
  border-left-color: var(--accent-orange);
  background: rgba(17, 38, 79, 0.7);
  transform: translateX(4px);
}

.page-news .update-item[open] {
  background: rgba(17, 38, 79, 0.78);
  border-left-color: var(--accent-cyan);
}

.page-news .update-item__head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  padding: 12px 14px;
  cursor: pointer;
  list-style: none;
}

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

.page-news .update-item__head:focus-visible {
  outline: 2px solid var(--accent-orange);
  outline-offset: -2px;
}

.page-news .update-item__no {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent-cyan);
  background: rgba(0, 194, 209, 0.1);
  border: 1px solid rgba(0, 194, 209, 0.25);
  padding: 2px 6px;
  white-space: nowrap;
  text-decoration: none;
}

.page-news .update-item__no:hover {
  color: var(--text-light);
  border-color: var(--accent-cyan);
}

.page-news .update-item__title {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-light);
  line-height: 1.4;
}

.page-news .update-item__cat {
  white-space: nowrap;
}

.page-news .update-item__date {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--border-blue);
  white-space: nowrap;
}

.page-news .update-item__body {
  padding: 2px 16px 16px 44px;
  margin: 0;
  border-top: 1px dashed rgba(141, 155, 181, 0.22);
  font-size: 14px;
  line-height: 1.75;
  color: var(--border-blue);
}

.page-news .tag {
  display: inline-block;
  padding: 2px 10px;
  background: rgba(255, 107, 0, 0.14);
  border: 1px solid rgba(255, 107, 0, 0.4);
  color: var(--accent-orange);
  font-size: 12px;
  line-height: 1.5;
  clip-path: polygon(6px 0, 100% 0, calc(100% - 6px) 100%, 0 100%);
}

.page-news .tag--cyan {
  background: rgba(0, 194, 209, 0.12);
  border-color: rgba(0, 194, 209, 0.4);
  color: var(--accent-cyan);
}

.page-news .tag--yellow {
  background: rgba(248, 193, 80, 0.12);
  border-color: rgba(248, 193, 80, 0.4);
  color: var(--warning);
}

.page-news .radar-panel {
  padding: 16px;
  border: 1px solid var(--border-light);
  border-right: 4px solid var(--accent-cyan);
  background: rgba(17, 38, 79, 0.35);
}

.page-news .radar-panel img {
  max-width: 100%;
}

.page-news .radar-note {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--border-blue);
}

.page-news .archive__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-bottom: 24px;
}

.page-news .archive-card {
  padding: 22px 20px;
  border: 1px solid var(--border-light);
  background: rgba(17, 38, 79, 0.5);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 22px 100%, 0 calc(100% - 22px));
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.page-news .archive-card:hover {
  transform: translateY(-4px);
}

.page-news .archive-card--data {
  border-top: 4px solid var(--accent-cyan);
}

.page-news .archive-card--feature {
  border-top: 4px solid var(--accent-orange);
}

.page-news .archive-card--search {
  border-top: 4px solid var(--warning);
}

.page-news .archive-card__title {
  font-family: var(--font-display);
  font-size: 26px;
  line-height: 1.2;
  margin: 0 0 10px;
}

.page-news .archive-card__summary {
  margin: 0 0 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--border-blue);
}

.page-news .archive-card__list {
  margin: 0 0 16px;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--text-light);
}

.page-news .archive__figure {
  margin: 0;
  text-align: center;
}

.page-news .archive__figure img {
  max-width: 600px;
  margin: 0 auto;
}

.page-news .rhythm {
  border-top: 1px solid var(--border-light);
}

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

.page-news .rhythm__links li {
  margin-bottom: 10px;
  padding-left: 14px;
  border-left: 3px solid var(--accent-orange);
}

.page-news .rhythm__notice {
  margin-top: 4px;
  padding: 16px 18px;
  background: rgba(248, 193, 80, 0.08);
  border: 1px solid rgba(248, 193, 80, 0.35);
}

.page-news .rhythm__notice p {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--border-blue);
}

.page-news .rhythm__figure img {
  max-width: 640px;
}

@media (max-width: 560px) {
  .page-news .update-item__head {
    gap: 6px;
    padding: 10px 12px;
  }

  .page-news .update-item__no {
    order: 1;
  }

  .page-news .update-item__date {
    order: 2;
    margin-left: auto;
  }

  .page-news .update-item__title {
    order: 3;
    flex-basis: 100%;
  }

  .page-news .update-item__cat {
    order: 4;
  }

  .page-news .update-item__body {
    padding-left: 16px;
  }
}

@media (min-width: 768px) {
  .page-news .section {
    padding: 48px 0 56px;
  }

  .page-news .news-hero {
    padding: 44px 0 28px;
  }

  .page-news .archive__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 900px) {
  .page-news .news-hero__grid {
    grid-template-columns: minmax(280px, 0.8fr) minmax(0, 1.2fr);
    align-items: center;
    gap: 48px;
  }
}

@media (min-width: 1024px) {
  .page-news .latest__grid,
  .page-news .rhythm__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(300px, 0.95fr);
    align-items: center;
    gap: 48px;
  }

  .page-news .updates-main {
    grid-template-columns: minmax(0, 1.35fr) minmax(240px, 0.65fr);
    align-items: start;
  }
}