.page-news {
  --news-index-width: 252px;
  --news-card-cut: 14px;
  background: var(--warm-paper);
  color: var(--ink);
  min-width: 0;
}

.page-news .news-shell {
  max-width: calc(var(--content-max) + 64px);
  margin: 0 auto;
  padding: 0 16px 48px;
}

.page-news .news-header {
  position: relative;
  background: var(--ink-blue);
  color: #f5f1e6;
  padding: 32px 20px 42px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
  margin-bottom: 36px;
}

.page-news .news-header::after {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 180px;
  background: repeating-linear-gradient(-45deg, rgba(255, 255, 255, 0.06) 0 8px, transparent 8px 16px);
  pointer-events: none;
}

.page-news .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
}

.page-news .breadcrumb a {
  color: var(--neon-green);
  text-decoration: none;
}

.page-news .breadcrumb a:hover,
.page-news .breadcrumb a:focus {
  text-decoration: underline;
}

.page-news .breadcrumb-sep {
  color: rgba(255, 255, 255, 0.4);
}

.page-news .page-kicker {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--neon-green);
  margin-bottom: 10px;
}

.page-news .news-heading {
  font-family: var(--font-heading);
  font-size: clamp(1.65rem, 4.4vw, 3rem);
  line-height: 1.06;
  letter-spacing: 0.02em;
  color: #fff;
  max-width: 860px;
  margin: 0 0 18px;
}

.page-news .news-heading-desc {
  max-width: 720px;
  margin: 0;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.82);
  border-left: 3px solid var(--neon-green);
  padding-left: 16px;
}

.page-news .news-layout {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.page-news .news-index {
  background: var(--ink-blue);
  color: var(--warm-paper);
  padding: 18px 14px;
  border-left: 4px solid var(--orange-red);
  flex-shrink: 0;
}

.page-news .news-index-title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  color: var(--neon-green);
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
  padding-bottom: 10px;
  margin: 0 0 12px;
}

.page-news .news-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-news .news-index-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 8px;
  color: rgba(243, 236, 216, 0.72);
  text-decoration: none;
  border-left: 3px solid transparent;
  font-size: 0.92rem;
  transition: color 160ms ease, border-color 160ms ease;
}

.page-news .news-index-link:hover,
.page-news .news-index-link:focus-visible {
  color: var(--neon-green);
  border-left-color: var(--neon-green);
  outline: none;
}

.page-news .idx-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--orange-red);
}

.page-news .news-index-foot {
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.7rem;
  color: rgba(243, 236, 216, 0.5);
  letter-spacing: 0.04em;
}

.page-news .news-content {
  flex: 1 1 auto;
  min-width: 0;
}

.page-news .news-section {
  margin-bottom: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--steel-blue);
}

.page-news .section-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  border-bottom: 2px solid var(--ink-blue);
  padding-bottom: 10px;
  margin-bottom: 16px;
}

.page-news .section-head h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.2rem, 2.4vw, 1.6rem);
  margin: 0;
  color: var(--ink-blue);
  line-height: 1.2;
}

.page-news .section-index {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--orange-red);
  letter-spacing: 0.12em;
  white-space: nowrap;
}

.page-news .section-desc {
  margin: 0 0 20px;
  line-height: 1.7;
  color: #333;
  max-width: 760px;
}

.page-news .feed-tabs {
  margin-bottom: 24px;
}

.page-news .feed-tabs .tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  border-bottom: 1px solid var(--steel-blue);
  margin-bottom: 20px;
}

.page-news .feed-tabs .tab-btn {
  font-family: var(--font-body);
  background: transparent;
  border: 0;
  border-bottom: 3px solid transparent;
  padding: 10px 16px;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--steel-blue);
  cursor: pointer;
}

.page-news .feed-tabs .tab-btn[aria-selected="true"] {
  color: var(--ink-blue);
  border-bottom-color: var(--neon-green);
}

.page-news .feed-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-news .feed-card {
  position: relative;
  background: #fffdf5;
  border: 1px solid var(--steel-blue);
  border-left: 4px solid var(--neon-green);
  padding: 18px 22px 20px;
  clip-path: polygon(0 0, calc(100% - var(--news-card-cut)) 0, 100% var(--news-card-cut), 100% 100%, 0 100%);
}

.page-news .feed-card-topline {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-bottom: 10px;
}

.page-news .feed-version {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--steel-blue);
  background: rgba(42, 51, 86, 0.08);
  padding: 2px 8px;
  letter-spacing: 0.04em;
}

.page-news .feed-title {
  font-size: 1.12rem;
  font-weight: 800;
  margin: 0 0 8px;
  line-height: 1.35;
  color: var(--ink-blue);
}

.page-news .feed-desc {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.7;
  color: #3a3a3a;
}

.page-news .feed-extend {
  margin-top: 12px;
  border-top: 1px dashed rgba(42, 51, 86, 0.3);
  padding-top: 10px;
}

.page-news .feed-extend summary {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--orange-red);
  cursor: pointer;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.page-news .feed-extend p {
  margin: 10px 0 0;
  font-size: 0.86rem;
  line-height: 1.7;
  color: #3a3a3a;
}

.page-news .version-grid {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.page-news .version-images {
  background: var(--ink-blue);
  overflow: hidden;
}

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

.page-news .version-list-wrap {
  background: #fffdf5;
  border: 1px solid var(--steel-blue);
  padding: 20px 18px;
}

.page-news .version-list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 22px;
  position: relative;
}

.page-news .version-list::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: var(--steel-blue);
}

.page-news .version-item {
  position: relative;
  padding: 12px 0;
}

.page-news .version-item::before {
  content: "";
  position: absolute;
  left: -22px;
  top: 20px;
  width: 12px;
  height: 12px;
  background: var(--neon-green);
  transform: rotate(45deg);
  box-shadow: 0 0 0 3px var(--warm-paper);
}

.page-news .version-node {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--orange-red);
  font-weight: 700;
  display: block;
  margin-bottom: 4px;
}

.page-news .version-item-body strong {
  display: block;
  font-size: 1rem;
  color: var(--ink-blue);
  margin-bottom: 2px;
}

.page-news .version-item-body span {
  font-size: 0.86rem;
  color: #3a3a3a;
  line-height: 1.6;
  display: block;
}

.page-news .calendar-topic-grid {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.page-news .calendar-feature {
  border: 1px solid var(--steel-blue);
  overflow: hidden;
}

.page-news .feature-img-frame {
  background: var(--ink-blue);
  padding: 12px;
}

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

.page-news .calendar-detail {
  background: var(--ink-blue);
  color: var(--warm-paper);
  padding: 20px;
  border-left: 4px solid var(--neon-green);
}

.page-news .calendar-detail .tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  margin-bottom: 16px;
}

.page-news .calendar-detail .tab-btn {
  font-family: var(--font-body);
  background: transparent;
  border: 0;
  border-bottom: 2px solid transparent;
  color: rgba(243, 236, 216, 0.6);
  padding: 8px 12px;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
}

.page-news .calendar-detail .tab-btn[aria-selected="true"] {
  color: var(--neon-green);
  border-bottom-color: var(--neon-green);
}

.page-news .calendar-detail .tab-panel {
  font-size: 0.92rem;
  line-height: 1.8;
}

.page-news .stat-bar {
  height: 26px;
  display: flex;
  margin: 16px 0 6px;
}

.page-news .stat-fill {
  height: 100%;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 26px;
  text-align: center;
  color: #fff;
}

.page-news .stat-fill--positive {
  background: var(--data-green);
  color: var(--neon-green);
}

.page-news .stat-fill--negative {
  background: var(--steel-blue);
  color: var(--warm-paper);
}

.page-news .stat-caption {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: rgba(243, 236, 216, 0.6);
}

.page-news .topic-list {
  margin: 16px 0 0;
  padding-left: 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.92rem;
}

.page-news .collection-grid {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.page-news .collection-workflow {
  background: #fffdf5;
  border: 1px solid var(--steel-blue);
  padding: 20px 18px;
}

.page-news .workflow-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-news .workflow-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.page-news .workflow-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: var(--orange-red);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
  flex-shrink: 0;
  margin-top: 2px;
}

.page-news .workflow-body strong {
  display: block;
  font-size: 1rem;
  color: var(--ink-blue);
  margin-bottom: 2px;
}

.page-news .workflow-body span {
  font-size: 0.86rem;
  color: #3a3a3a;
  line-height: 1.6;
  display: block;
}

.page-news .collection-visual {
  border: 1px solid var(--steel-blue);
  overflow: hidden;
}

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

.page-news .announcement-grid {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.page-news .announcement-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-news .announce-card {
  border: 1px solid var(--steel-blue);
  border-left: 4px solid var(--orange-red);
  background: #fffdf5;
  padding: 18px 20px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
}

.page-news .announce-card:nth-child(2) {
  border-left-color: var(--neon-green);
}

.page-news .announce-card:nth-child(3) {
  border-left-color: var(--ink-blue);
}

.page-news .announce-card:nth-child(4) {
  border-left-color: var(--data-green);
}

.page-news .announce-card h3 {
  font-size: 1rem;
  font-weight: 800;
  margin: 8px 0 6px;
  color: var(--ink-blue);
}

.page-news .announce-card p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.65;
  color: #3a3a3a;
}

.page-news .announcement-visual {
  border: 1px solid var(--steel-blue);
  overflow: hidden;
}

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

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

.page-news .news-actions .btn {
  text-decoration: none;
}

@media (min-width: 860px) {
  .page-news .news-layout {
    flex-direction: row;
    align-items: flex-start;
  }

  .page-news .news-index {
    position: sticky;
    top: 16px;
    width: var(--news-index-width);
    max-height: calc(100vh - 32px);
    overflow: auto;
  }

  .page-news .version-grid {
    flex-direction: row;
    align-items: stretch;
  }

  .page-news .version-images {
    flex: 0 0 46%;
  }

  .page-news .version-list-wrap {
    flex: 1;
  }

  .page-news .calendar-topic-grid {
    flex-direction: row;
    align-items: stretch;
  }

  .page-news .calendar-feature {
    flex: 1.15;
  }

  .page-news .calendar-detail {
    flex: 1;
  }

  .page-news .collection-grid {
    flex-direction: row;
    align-items: stretch;
  }

  .page-news .collection-workflow {
    flex: 1;
  }

  .page-news .collection-visual {
    flex: 1;
  }

  .page-news .announcement-grid {
    flex-direction: row;
    align-items: stretch;
  }

  .page-news .announcement-cards {
    flex: 1.1;
    grid-template-columns: 1fr;
  }

  .page-news .announcement-visual {
    flex: 0.9;
  }
}

@media (min-width: 1080px) {
  .page-news .announcement-cards {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-news .announce-card:nth-child(4) {
    grid-column: span 2;
  }
}