.page-news {
  --news-border: rgba(200, 208, 216, 0.16);
  --news-panel-strong: #061018;
}

.page-news .news-hero {
  position: relative;
  padding: clamp(24px, 4vw, 48px) 0 36px;
}

.page-news .news-hero::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -1px;
  width: 46%;
  height: 8px;
  clip-path: polygon(10px 0, 100% 0, calc(100% - 18px) 100%, 0 100%);
  background: linear-gradient(90deg, var(--neon-green), var(--sky-blue));
  opacity: 0.7;
}

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

.page-news .hero-copy .index-label {
  margin-bottom: 12px;
}

.page-news .hero-copy h1 {
  margin: 12px 0 16px;
  font-size: clamp(30px, 4.5vw, 52px);
  line-height: 1.16;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.page-news .hero-copy .cover-lead {
  max-width: 640px;
  margin: 0;
  font-size: 18px;
  line-height: 1.7;
  color: var(--metal-silver);
}

.page-news .hero-meta {
  margin: 16px 0 0;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  color: var(--cool-gray);
  border-left: 2px solid var(--neon-green);
  padding-left: 14px;
  max-width: 640px;
}

.page-news .hero-rail {
  display: grid;
  gap: 12px;
}

.page-news .hero-note,
.page-news .hero-note-static {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 18px;
  background: rgba(6, 16, 24, 0.72);
  border: 1px solid var(--news-border);
  border-radius: var(--radius-md);
  color: var(--metal-silver);
  font-size: 15px;
  font-family: var(--font-mono);
  line-height: 1.4;
  text-decoration: none;
  transition: border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.page-news a.hero-note:hover,
.page-news a.hero-note:focus-visible {
  border-color: var(--neon-green);
  color: var(--neon-green);
  transform: translateX(4px);
}

.page-news .hero-note .mono-value,
.page-news .hero-note-static .mono-value {
  color: var(--neon-green);
  font-size: 13px;
  flex-shrink: 0;
}

.page-news .news-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  padding: 16px 0 40px;
  align-items: start;
}

.page-news .article-list-panel {
  min-width: 0;
}

.page-news .section-head {
  margin-bottom: 8px;
}

.page-news .article-list {
  display: grid;
}

.page-news .article-item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  padding: 24px 0;
  border-bottom: 1px solid var(--news-border);
}

.page-news .article-item:last-child {
  border-bottom: 0;
}

.page-news .article-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 26px;
  bottom: 26px;
  width: 2px;
  background: linear-gradient(180deg, var(--neon-green), transparent);
  opacity: 0.55;
  border-radius: var(--radius-pill);
}

.page-news .article-copy {
  min-width: 0;
}

.page-news .article-meta-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.page-news .article-idx {
  color: var(--neon-green);
  font-size: 14px;
  font-weight: 600;
}

.page-news .article-time {
  color: var(--cool-gray);
  font-size: 13px;
  font-family: var(--font-mono);
}

.page-news .article-title {
  margin: 12px 0 8px;
  font-size: 22px;
  line-height: 1.4;
  font-weight: 800;
}

.page-news .article-title a {
  color: var(--ice-white);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.page-news .article-title a:hover,
.page-news .article-title a:focus-visible {
  color: var(--neon-green);
}

.page-news .article-excerpt {
  margin: 0;
  color: var(--metal-silver);
  opacity: 0.82;
  font-size: 15px;
  line-height: 1.7;
}

.page-news .article-thumb {
  width: 100%;
  max-width: 400px;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius-md);
  border: 1px solid var(--news-border);
  background: var(--deep-navy);
}

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

.page-news .hot-tags-card,
.page-news .subscribe-card {
  border-radius: var(--radius-lg);
  padding: 24px;
}

.page-news .hot-tags-card .section-title,
.page-news .subscribe-card .section-title {
  margin: 10px 0 6px;
}

.page-news .tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.page-news .tag-link {
  text-decoration: none;
  transition: border-color var(--transition-fast), color var(--transition-fast), background-color var(--transition-fast);
}

.page-news .tag-link:hover,
.page-news .tag-link:focus-visible {
  border-color: var(--neon-green);
  color: var(--neon-green);
  background-color: rgba(0, 255, 136, 0.06);
}

.page-news .subscribe-card {
  background:
    linear-gradient(160deg, rgba(0, 255, 136, 0.08), transparent 62%),
    var(--news-panel-strong);
  border: 1px solid rgba(0, 255, 136, 0.32);
}

.page-news .subscribe-mail {
  display: inline-block;
  margin: 8px 0 16px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: rgba(0, 255, 136, 0.08);
  color: var(--neon-green);
  font-family: var(--font-mono);
  font-size: 14px;
  word-break: break-all;
}

.page-news .subscribe-demo {
  margin-top: 14px;
  border-top: 1px solid var(--news-border);
  padding-top: 14px;
}

.page-news .subscribe-demo summary {
  list-style: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--sky-blue);
  font-size: 15px;
  font-weight: 600;
  transition: color var(--transition-fast);
}

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

.page-news .subscribe-demo summary::after {
  content: "+";
  color: var(--neon-green);
  font-family: var(--font-mono);
}

.page-news .subscribe-demo[open] summary {
  color: var(--neon-green);
}

.page-news .subscribe-demo[open] summary::after {
  content: "–";
}

.page-news .subscribe-demo p {
  margin: 10px 0 0;
  color: var(--metal-silver);
  font-size: 14px;
  line-height: 1.6;
}

.page-news .featured-section {
  padding: 40px 0 48px;
}

.page-news .featured-section .index-label {
  margin-bottom: 10px;
}

.page-news .featured-section .section-title {
  margin: 8px 0 20px;
}

.page-news .featured-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  background:
    linear-gradient(120deg, rgba(0, 255, 136, 0.06), transparent 46%),
    var(--news-panel-strong);
  border: 1px solid var(--news-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  text-decoration: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.page-news .featured-card:hover,
.page-news .featured-card:focus-visible {
  border-color: var(--neon-green);
  box-shadow: var(--shadow-lg);
}

.page-news .featured-copy {
  padding: 28px;
}

.page-news .featured-copy .mono-value {
  color: var(--cool-gray);
  font-size: 13px;
  margin-left: 8px;
}

.page-news .featured-copy h3 {
  margin: 14px 0 12px;
  font-size: 24px;
  line-height: 1.35;
  font-weight: 900;
  color: var(--ice-white);
}

.page-news .featured-copy p {
  margin: 0 0 18px;
  color: var(--metal-silver);
  line-height: 1.7;
}

.page-news .featured-copy .btn {
  margin-top: 4px;
}

@media (min-width: 720px) {
  .page-news .article-item.has-thumb {
    grid-template-columns: minmax(0, 1fr) 200px;
    align-items: center;
  }

  .page-news .article-item.has-thumb .article-thumb {
    width: 200px;
    height: 150px;
    max-width: none;
  }

  .page-news .featured-card {
    grid-template-columns: minmax(0, 1fr) 0.9fr;
    align-items: center;
  }
}

@media (min-width: 1024px) {
  .page-news .hero-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
    gap: 48px;
    align-items: end;
  }

  .page-news .hero-rail {
    padding-bottom: 4px;
  }

  .page-news .news-layout {
    grid-template-columns: minmax(0, 1fr) 340px;
    gap: 48px;
  }

  .page-news .news-aside {
    position: sticky;
    top: 32px;
  }

  .page-news .featured-copy {
    padding: 40px;
  }
}