/* ============ 更新说明页 · 期刊布局 ============ */
.page-news {
  --news-line: #2C4C66;
  --news-line-soft: rgba(44, 76, 102, 0.55);
  --news-grid: linear-gradient(rgba(44, 76, 102, 0.16) 1px, transparent 1px),
               linear-gradient(90deg, rgba(44, 76, 102, 0.16) 1px, transparent 1px);
  background: var(--bg-primary);
  color: var(--text-primary);
}

/* ===== 期刊刊头 ===== */
.page-news .news-masthead {
  background: var(--bg-gradient);
  border-bottom: 1px solid var(--border-color);
  padding: 40px 0 56px;
  position: relative;
}

.page-news .news-masthead::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--news-grid);
  background-size: 48px 48px;
  opacity: 0.45;
  pointer-events: none;
}

.page-news .news-masthead::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 16px;
  height: 6px;
  background: repeating-linear-gradient(90deg, var(--text-secondary) 0 1px, transparent 1px 9px);
  opacity: 0.3;
  pointer-events: none;
}

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

.page-news .breadcrumb {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 40px;
  letter-spacing: 0.04em;
}

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

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

.page-news .breadcrumb-sep {
  margin: 0 8px;
  color: var(--border-color);
}

.page-news .kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.28em;
  color: var(--accent-orange);
  text-transform: uppercase;
  margin: 0 0 12px;
}

.page-news .news-masthead h1 {
  font-family: var(--font-headline);
  font-size: 28px;
  line-height: 1.24;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 0 0 16px;
}

.page-news .masthead-lead {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.75;
  max-width: 56ch;
  margin: 0 0 28px;
}

.page-news .masthead-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
}

.page-news .stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-news .stat-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.page-news .stat-num {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
}

.page-news .masthead-version {
  margin-top: 44px;
}

.page-news .version-big {
  font-family: var(--font-mono);
  font-size: clamp(88px, 24vw, 168px);
  font-weight: 800;
  line-height: 0.82;
  letter-spacing: -0.06em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(46, 214, 180, 0.8);
  display: block;
  user-select: none;
}

.page-news .version-caption {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.26em;
  color: var(--text-secondary);
  text-transform: uppercase;
  display: block;
  margin-top: 12px;
}

/* ===== 章节通用 ===== */
.page-news .section {
  padding: 56px 0;
}

.page-news .section-index {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--accent-cyan);
  margin: 0 0 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-news .section-index::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--accent-orange);
  display: inline-block;
  flex: none;
}

.page-news .section h2 {
  font-family: var(--font-headline);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: -0.01em;
  margin: 0 0 16px;
}

/* ===== 本期重点 ===== */
.page-news .featured-block {
  background: var(--bg-primary);
}

.page-news .featured-grid {
  display: grid;
  gap: 32px;
  align-items: start;
}

.page-news .featured-copy > p:not(.section-index) {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.75;
}

.page-news .feature-list {
  list-style: none;
  margin: 24px 0 28px;
  padding: 0;
  border-top: 1px solid var(--border-color);
}

.page-news .feature-list li {
  position: relative;
  padding: 12px 0 12px 22px;
  border-bottom: 1px solid var(--news-line-soft);
  font-size: 14px;
  line-height: 1.55;
}

.page-news .feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20px;
  width: 12px;
  height: 1px;
  background: var(--accent-orange);
}

.page-news .featured-figure {
  margin: 0;
  padding: 10px;
  background: linear-gradient(135deg, rgba(242, 101, 34, 0.08) 0%, transparent 50%), var(--bg-secondary);
  border: 1px solid var(--border-color);
}

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

.page-news .featured-figure figcaption {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  padding: 10px 2px 2px;
}

/* ===== 更新列表 ===== */
.page-news .updates-section {
  border-top: 1px solid var(--border-color);
}

.page-news .updates-heading-row h2 {
  margin-bottom: 8px;
}

.page-news .filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 16px 0 36px;
}

.page-news .filter-chip {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--accent-cyan);
  border: 1px solid var(--accent-cyan);
  padding: 6px 16px;
  text-decoration: none;
  transition: background var(--transition), color var(--transition);
}

.page-news .filter-chip:hover {
  background: var(--accent-cyan);
  color: var(--bg-primary);
}

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

.page-news .update-column {
  margin-bottom: 52px;
  scroll-margin-top: 120px;
}

.page-news .column-title {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.3;
  margin: 0;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--text-primary);
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
}

.page-news .column-note {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  color: var(--text-secondary);
  letter-spacing: 0.06em;
}

.page-news .update-entry {
  position: relative;
  padding: 22px 0 22px 18px;
  border-bottom: 1px solid var(--border-color);
}

.page-news .update-entry:last-child {
  border-bottom: none;
}

.page-news .update-entry::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 100%;
  background: var(--accent-orange);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition);
}

.page-news .update-entry:hover::before,
.page-news .update-entry:focus-within::before {
  transform: scaleY(1);
}

.page-news .entry-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.page-news .entry-time {
  letter-spacing: 0.08em;
}

.page-news .entry-version {
  color: var(--accent-cyan);
}

.page-news .entry-heading {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.page-news .entry-heading h4 {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.3;
  margin: 0;
}

.page-news .entry-content > p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
}

.page-news .status-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  border: 1px solid var(--accent-cyan);
  padding: 3px 10px;
  white-space: nowrap;
}

.page-news .status-tag.is-progress {
  color: var(--accent-orange);
  border-color: var(--accent-orange);
}

/* details 折叠 */
.page-news .detail-panel {
  margin-top: 12px;
  border-left: 2px solid var(--border-color);
  padding-left: 12px;
}

.page-news .detail-panel summary {
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent-cyan);
  list-style: none;
  display: inline-block;
}

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

.page-news .detail-panel summary::before {
  content: "+";
  display: inline-block;
  width: 16px;
  color: var(--accent-orange);
  font-weight: 700;
}

.page-news .detail-panel[open] summary::before {
  content: "–";
}

.page-news .detail-panel summary:focus-visible {
  outline: 1px solid var(--accent-orange);
  outline-offset: 4px;
}

.page-news .panel-body {
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
}

.page-news .steps-list {
  margin: 4px 0 0;
  padding-left: 18px;
  display: grid;
  gap: 4px;
}

/* 条目配图 */
.page-news .entry-figure {
  margin: 16px 0 0;
  padding: 8px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
}

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

.page-news .entry-figure figcaption {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-secondary);
  padding: 8px 2px 2px;
  letter-spacing: 0.06em;
}

/* ===== 版本归档 ===== */
.page-news .archive-section {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
}

.page-news .archive-grid {
  display: grid;
  gap: 32px;
  align-items: start;
}

.page-news .archive-copy > p:not(.section-index) {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.75;
}

.page-news .version-timeline {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  border-top: 1px solid var(--border-color);
}

.page-news .version-timeline li {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 18px;
  padding: 14px 0 14px 24px;
  border-bottom: 1px solid var(--news-line-soft);
}

.page-news .version-timeline li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  width: 7px;
  height: 7px;
  border: 1px solid var(--accent-cyan);
  transform: rotate(45deg);
  background: var(--bg-secondary);
}

.page-news .vt-version {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--accent-cyan);
  min-width: 62px;
  letter-spacing: 0.02em;
}

.page-news .vt-note {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.page-news .archive-figure {
  margin: 0;
  padding: 10px;
  background: linear-gradient(135deg, rgba(46, 214, 180, 0.06) 0%, transparent 60%), var(--bg-primary);
  border: 1px solid var(--border-color);
}

.page-news .archive-figure img {
  width: 100%;
  height: auto;
  display: block;
}

.page-news .archive-figure figcaption {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-secondary);
  padding: 10px 2px 2px;
  letter-spacing: 0.06em;
}

/* ===== 相关入口 ===== */
.page-news .links-section {
  border-top: 1px solid var(--border-color);
}

.page-news .links-intro {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.7;
  margin: 0 0 24px;
  max-width: 60ch;
}

.page-news .links-intro a {
  color: var(--accent-cyan);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.page-news .link-panels {
  display: grid;
  gap: 1px;
  background: var(--border-color);
  border: 1px solid var(--border-color);
}

.page-news .link-panel {
  display: grid;
  gap: 6px;
  background: var(--bg-secondary);
  padding: 20px;
  text-decoration: none;
  color: var(--text-primary);
  transition: background var(--transition);
}

.page-news .link-panel:hover {
  background: var(--bg-primary);
}

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

.page-news .lp-index {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent-orange);
  letter-spacing: 0.08em;
}

.page-news .lp-title {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.3;
}

.page-news .lp-desc {
  font-size: 13px;
  line-height: 1.55;
  color: var(--text-secondary);
}

/* ===== 按钮增强 ===== */
.page-news .btn-primary {
  display: inline-block;
}

.page-news .btn-primary:hover {
  box-shadow: 0 0 24px rgba(242, 101, 34, 0.35);
}

/* ===== 图片通用 ===== */
.page-news img {
  max-width: 100%;
  height: auto;
}

/* ===== 桌面端 ===== */
@media (min-width: 768px) {
  .page-news .news-masthead {
    padding: 56px 0 72px;
  }

  .page-news .news-masthead h1 {
    font-size: 36px;
  }

  .page-news .masthead-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.8fr);
    gap: 48px;
    align-items: end;
  }

  .page-news .masthead-version {
    margin-top: 0;
    text-align: right;
  }

  .page-news .version-big {
    font-size: clamp(120px, 16vw, 200px);
  }

  .page-news .section {
    padding: 72px 0;
  }

  .page-news .section h2 {
    font-size: 28px;
  }

  .page-news .featured-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 56px;
    align-items: center;
  }

  .page-news .updates-heading-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
  }

  .page-news .updates-heading-row .section-index {
    flex-basis: 100%;
  }

  .page-news .updates-heading-row h2 {
    margin-bottom: 24px;
  }

  .page-news .filter-chips {
    margin: 0 0 24px;
  }

  .page-news .update-entry {
    display: grid;
    grid-template-columns: 180px minmax(0, 1fr);
    gap: 24px;
    padding: 28px 0 28px 24px;
  }

  .page-news .entry-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    margin-bottom: 0;
    padding-top: 4px;
  }

  .page-news .entry-content {
    min-width: 0;
  }

  .page-news .entry-with-image .entry-content {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 240px;
    gap: 8px 24px;
    align-items: start;
  }

  .page-news .entry-with-image .entry-heading {
    grid-column: 1;
  }

  .page-news .entry-with-image .entry-content > p {
    grid-column: 1;
    margin-top: 0;
  }

  .page-news .entry-with-image .detail-panel {
    grid-column: 1;
    margin-top: 4px;
  }

  .page-news .entry-with-image .entry-figure {
    grid-column: 2;
    grid-row: 1 / -1;
    margin-top: 0;
    align-self: start;
  }

  .page-news .archive-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
    gap: 56px;
  }

  .page-news .link-panels {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1200px) {
  .page-news .news-masthead h1 {
    font-size: 42px;
    max-width: 16ch;
  }

  .page-news .masthead-lead {
    max-width: 60ch;
  }
}