.page-news {
  --news-card-bg: rgba(255, 255, 255, 0.88);
  --news-card-border: rgba(10, 26, 47, 0.1);
  --news-grid-line: rgba(0, 255, 157, 0.05);
}

.page-news__hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 6vw, 72px) 0 clamp(32px, 8vw, 88px);
  background:
    linear-gradient(rgba(0, 255, 157, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 255, 157, 0.07) 1px, transparent 1px),
    var(--c-deep);
  background-size: 28px 28px, 28px 28px, auto;
  color: var(--c-cloud);
}

.page-news__hero::after {
  content: "";
  position: absolute;
  right: -60px;
  top: 38%;
  width: 220px;
  height: 220px;
  background: linear-gradient(135deg, rgba(0, 255, 157, 0.3), rgba(255, 77, 46, 0.24));
  transform: rotate(12deg) skewX(-15deg);
  clip-path: polygon(0 0, 100% 0, 85% 100%, 15% 100%);
  opacity: 0.6;
  pointer-events: none;
}

.page-news__hero-inner {
  position: relative;
  z-index: 1;
}

.page-news__hero .breadcrumb {
  color: var(--c-grid);
  margin-bottom: 32px;
}

.page-news__hero .breadcrumb a {
  color: var(--c-cloud);
  text-decoration: none;
}

.page-news__hero .breadcrumb a:hover {
  color: var(--c-neon);
}

.page-news__hero .breadcrumb__sep {
  color: var(--c-coral);
  margin: 0 8px;
}

.page-news__hero h1 {
  font-family: var(--f-head);
  font-style: italic;
  font-size: clamp(2.4rem, 8vw, 4.8rem);
  line-height: 0.98;
  letter-spacing: -0.02em;
  color: var(--c-cloud);
  margin: 12px 0 16px;
}

.page-news__hero-desc {
  max-width: 34em;
  color: var(--c-grid);
  font-size: 1.0625rem;
  line-height: 1.6;
  margin: 0 0 24px;
}

.page-news__hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-news__hero .btn--ghost {
  color: var(--c-cloud);
  border-color: rgba(244, 246, 248, 0.6);
  background: transparent;
}

.page-news__hero-aside {
  display: none;
  font-family: var(--f-mono);
  text-align: right;
  font-size: 14px;
  letter-spacing: 0.08em;
  line-height: 1.4;
  color: rgba(0, 255, 157, 0.6);
}

.page-news__filter-wrap {
  position: sticky;
  top: 0;
  z-index: 20;
  padding: 10px 0;
  background: rgba(10, 26, 47, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0, 255, 157, 0.16);
}

.page-news__filter-wrap .filter-bar {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 2px 0;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

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

.page-news .filter-btn {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(199, 205, 214, 0.5);
  border-radius: 999px;
  padding: 8px 16px;
  background: transparent;
  color: var(--c-grid);
  font: 600 14px/1 var(--f-body);
  cursor: pointer;
  transition: color 0.3s var(--ease), background 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-news .filter-btn:hover {
  border-color: var(--c-neon);
  color: var(--c-neon);
}

.page-news .filter-btn.is-active {
  background: var(--grad-accent);
  border-color: transparent;
  color: var(--c-deep);
}

.page-news__pinned-section {
  background: var(--c-deep);
}

.page-news__pinned {
  display: grid;
  gap: 24px;
  padding: 24px;
  border: 1px solid transparent;
  background:
    linear-gradient(var(--c-deep), var(--c-deep)) padding-box,
    var(--grad-accent) border-box;
  box-shadow: var(--shadow-glow);
}

.page-news__pinned-tag {
  display: inline-flex;
  align-items: center;
  color: var(--c-neon);
  font-weight: 600;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.page-news__pinned h2 {
  font-family: var(--f-head);
  font-style: italic;
  font-size: clamp(1.5rem, 4vw, 2.4rem);
  line-height: 1.15;
  color: var(--c-cloud);
  margin: 0 0 10px;
}

.page-news__pinned p {
  color: var(--c-grid);
  margin: 0 0 18px;
  line-height: 1.6;
}

.page-news__pinned-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.page-news__pinned .page-news__time {
  color: var(--c-grid);
}

.page-news__pinned-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
}

.page-news__list-section {
  background: var(--c-cloud);
}

.page-news__list-header {
  margin-bottom: 28px;
}

.page-news__timeline {
  display: grid;
  gap: 20px;
}

.page-news__item {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 16px;
  padding: 22px 20px;
  background-image:
    linear-gradient(var(--news-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--news-grid-line) 1px, transparent 1px),
    linear-gradient(145deg, #ffffff, var(--c-cloud));
  background-size: 22px 22px, 22px 22px, auto;
  border: 1px solid var(--news-card-border);
  box-shadow: 0 10px 32px rgba(10, 26, 47, 0.08);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.page-news__item:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 50px rgba(10, 26, 47, 0.14);
}

.page-news__item[hidden] {
  display: none !important;
}

.page-news__item-index {
  font-family: var(--f-mono);
  font-size: clamp(1.5rem, 4vw, 2.4rem);
  font-weight: 700;
  line-height: 1;
  color: var(--c-coral);
  padding-top: 4px;
}

.page-news__item-body {
  min-width: 0;
}

.page-news__item-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.page-news__time {
  font-family: var(--f-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: rgba(10, 26, 47, 0.55);
}

.page-news__item h3 {
  font-family: var(--f-head);
  font-style: italic;
  font-size: clamp(1.1rem, 2.4vw, 1.45rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--c-deep);
  margin: 0 0 8px;
}

.page-news__item-desc {
  color: rgba(10, 26, 47, 0.72);
  font-size: 0.9375rem;
  line-height: 1.6;
  margin: 0 0 12px;
}

.page-news .tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  font: 600 12px/1 var(--f-body);
  letter-spacing: 0.02em;
}

.page-news .tag::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.page-news .tag--calendar {
  background: rgba(0, 255, 157, 0.16);
  color: var(--c-neon);
}

.page-news .tag--version {
  background: rgba(255, 77, 46, 0.16);
  color: var(--c-coral);
}

.page-news .tag--data {
  background: rgba(30, 58, 95, 0.35);
  color: var(--c-cloud);
}

.page-news .tag--report {
  background: rgba(0, 255, 157, 0.12);
  color: var(--c-neon);
}

.page-news .tag--notice {
  background: rgba(255, 77, 46, 0.16);
  color: var(--c-coral);
}

.page-news__item-media {
  margin: 14px 0 6px;
  max-width: 600px;
}

.page-news__item-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 4px;
}

.page-news__expand {
  margin-top: 4px;
  font-size: 0.875rem;
}

.page-news__expand summary {
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  color: var(--c-coral);
  font-weight: 600;
}

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

.page-news__expand summary::after {
  content: "+";
  font-family: var(--f-mono);
  font-weight: 500;
}

.page-news__expand[open] summary::after {
  content: "–";
}

.page-news__expand p {
  margin: 12px 0 0;
  padding: 12px 14px;
  border-left: 2px solid var(--c-neon);
  background: rgba(0, 255, 157, 0.06);
  color: rgba(10, 26, 47, 0.8);
  line-height: 1.6;
}

.page-news__foot {
  position: relative;
  overflow: hidden;
  background: var(--c-deep);
  color: var(--c-cloud);
}

.page-news__foot::before {
  content: "";
  position: absolute;
  left: -40px;
  bottom: -80px;
  width: 240px;
  height: 240px;
  background: linear-gradient(135deg, rgba(0, 255, 157, 0.2), rgba(255, 77, 46, 0.16));
  transform: rotate(-8deg) skewX(-18deg);
  pointer-events: none;
}

.page-news__foot-inner {
  position: relative;
  z-index: 1;
}

.page-news__foot .sec-index {
  color: var(--c-neon);
}

.page-news__foot .sec-title {
  color: var(--c-cloud);
}

.page-news__foot .sec-desc {
  color: var(--c-grid);
}

.page-news__foot-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-news__foot .btn--ghost {
  color: var(--c-cloud);
  border-color: rgba(244, 246, 248, 0.6);
  background: transparent;
}

.page-news__foot .btn--ghost:hover {
  border-color: var(--c-neon);
  color: var(--c-neon);
}

@media (min-width: 700px) {
  .page-news__item {
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 20px;
    padding: 26px 24px;
  }

  .page-news__item-index {
    font-size: 2.2rem;
  }

  .page-news__pinned {
    gap: 28px;
  }
}

@media (min-width: 980px) {
  .page-news__hero-grid {
    display: grid;
    grid-template-columns: 1.4fr 0.6fr;
    gap: 40px;
    align-items: end;
  }

  .page-news__hero-aside {
    display: block;
  }

  .page-news__pinned {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
    gap: 40px;
    padding: 32px;
  }

  .page-news__item {
    grid-template-columns: 76px minmax(0, 1fr);
    gap: 24px;
    padding: 28px 30px;
  }

  .page-news__item-index {
    font-size: 2.6rem;
  }
}