.page-news {
  --tl-line: #DDD3C2;
  --tl-bullet: var(--accent-gold);
  --changelog-bg: #FFFFFF;
  background: var(--cream);
  color: var(--ink);
}

/* ===== 首屏 Hero ===== */
.page-news .news-hero {
  position: relative;
  padding: 2rem 0 2.25rem;
  border-bottom: 1px solid var(--paper-line);
}

.page-news .news-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-red) 0 25%, var(--accent-gold) 25% 50%, var(--sky-blue) 50% 75%, var(--clay) 75% 100%);
}

.page-news .news-hero .breadcrumbs {
  margin-bottom: 1.25rem;
}

.page-news .news-masthead h1 {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 5vw, 2.75rem);
  font-weight: 700;
  line-height: 1.15;
  max-width: 38rem;
  margin: 0.5rem 0 0.9rem;
}

.page-news .news-masthead .lead {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--stone);
  max-width: 38rem;
}

.page-news .news-index-note {
  margin-top: 1.5rem;
  padding: 1.1rem 1.2rem;
  background: var(--snow);
  border: 1px solid var(--paper-line);
  border-left: 3px solid var(--accent-gold);
}

.page-news .news-index-note p {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  color: var(--stone);
  margin-bottom: 0.7rem;
}

.page-news .news-index-note ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.4rem;
}

.page-news .news-index-note li {
  font-size: 0.86rem;
  line-height: 1.55;
  padding-left: 1rem;
  position: relative;
}

.page-news .news-index-note li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 0.4rem;
  height: 0.4rem;
  border-radius: 50%;
  background: var(--accent-gold);
}

/* ===== 分类筛选 ===== */
.page-news .news-filter {
  padding: 1.4rem 0 1.6rem;
  border-bottom: 1px solid var(--paper-line);
}

.page-news .news-filter .kicker {
  margin-bottom: 0.7rem;
}

.page-news .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.page-news .filter-btn {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  border: 1px solid var(--clay);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--clay);
  text-decoration: none;
  background: transparent;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.page-news .filter-btn:hover,
.page-news .filter-btn:focus-visible {
  background: var(--clay);
  color: var(--cream);
  border-color: var(--clay);
}

.page-news .filter-btn.is-active {
  background: var(--accent-red);
  border-color: var(--accent-red);
  color: var(--snow);
}

.page-news .filter-btn.is-active:hover,
.page-news .filter-btn.is-active:focus-visible {
  background: var(--accent-red);
  color: var(--snow);
  box-shadow: inset 0 0 0 1px var(--accent-red);
}

/* ===== 时间线 ===== */
.page-news .news-timeline-section {
  padding: 2.5rem 0 3.5rem;
}

.page-news .section-head {
  margin-bottom: 2rem;
}

.page-news .section-title {
  font-size: clamp(1.4rem, 3vw, 2rem);
  line-height: 1.2;
  margin: 0.25rem 0 0.5rem;
}

.page-news .section-head .lead {
  font-size: 0.9rem;
  color: var(--stone);
}

.page-news .news-timeline {
  position: relative;
}

.page-news .timeline-item {
  position: relative;
  padding: 0 0 2.5rem 1.35rem;
  border-left: 2px solid var(--tl-line);
}

.page-news .timeline-item:last-child {
  padding-bottom: 0;
}

.page-news .timeline-item::before {
  content: "";
  position: absolute;
  left: -0.45rem;
  top: 0.32rem;
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  background: var(--tl-bullet);
  border: 2px solid var(--cream);
}

.page-news .timeline-item.item-version::before { background: var(--accent-red); }
.page-news .timeline-item.item-catalog::before { background: var(--sky-blue); }
.page-news .timeline-item.item-cycle::before { background: var(--accent-gold); }
.page-news .timeline-item.item-help::before { background: var(--clay); }

.page-news .timeline-date {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 0.7rem;
}

.page-news .timeline-date .index-num {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--stone);
}

.page-news .timeline-date time {
  font-family: var(--font-hand);
  font-size: 1.15rem;
  color: var(--clay);
}

.page-news .tl-topline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 0.6rem;
}

.page-news .tl-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--stone);
  letter-spacing: 0.04em;
}

.page-news .timeline-content h3 {
  font-size: 1.2rem;
  line-height: 1.4;
  font-weight: 700;
  margin-bottom: 0.65rem;
}

.page-news .timeline-content p {
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--ink);
  max-width: 46rem;
}

.page-news .timeline-figure {
  margin: 1.1rem 0 0.9rem;
}

.page-news .timeline-figure img {
  display: block;
  max-width: 100%;
  height: auto;
  max-width: 32rem;
  object-fit: cover;
  border: 1px solid var(--paper-line);
}

.page-news .timeline-figure .figure-caption {
  margin-top: 0.35rem;
}

.page-news .timeline-link {
  display: inline-block;
  margin-top: 0.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--sky-blue);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.page-news .timeline-link:hover,
.page-news .timeline-link:focus-visible {
  border-bottom-color: var(--sky-blue);
  color: var(--accent-red);
}

/* ===== 更新记录 ===== */
.page-news .news-changelog {
  background: var(--changelog-bg);
  padding: 2.5rem 0 3rem;
  border-top: 1px solid var(--paper-line);
  border-bottom: 1px solid var(--paper-line);
}

.page-news .changelog-intro .kicker {
  margin-bottom: 0.7rem;
}

.page-news .changelog-intro h2 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  line-height: 1.2;
  margin-bottom: 0.8rem;
}

.page-news .changelog-intro .lead {
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--stone);
  margin-bottom: 1rem;
}

.page-news .changelog-points {
  list-style: none;
  margin: 0 0 1.4rem;
  padding: 0;
  display: grid;
  gap: 0.35rem;
}

.page-news .changelog-points li {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--stone);
  padding-left: 1.1rem;
  position: relative;
}

.page-news .changelog-points li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--accent-gold);
}

.page-news .changelog-list {
  list-style: none;
  margin: 1.75rem 0 0;
  padding: 0;
}

.page-news .changelog-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 0.7rem;
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--paper-line);
}

.page-news .changelog-list li:last-child {
  border-bottom: none;
}

.page-news .changelog-list .index-num {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--stone);
  min-width: 2.6rem;
}

.page-news .changelog-version {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--ink);
}

.page-news .changelog-desc {
  flex: 1;
  min-width: 8rem;
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--ink);
}

.page-news .changelog-list .tag {
  font-size: 0.72rem;
}

/* ===== 页底署名 ===== */
.page-news .news-signoff {
  padding: 3rem 0 3.5rem;
}

.page-news .signoff-card {
  display: grid;
  gap: 2rem;
  background: var(--snow);
  border: 1px solid var(--paper-line);
  padding: 1.4rem;
}

.page-news .signoff-media .kicker {
  margin-bottom: 0.8rem;
}

.page-news .signoff-snowline {
  height: 0.5rem;
  background: linear-gradient(135deg, var(--sky-blue) 0 28%, var(--snow) 28% 32%, var(--sky-blue) 32% 55%, var(--snow) 55% 60%, var(--sky-blue) 60% 82%, var(--snow) 82% 86%, var(--sky-blue) 86% 100%);
  margin-bottom: 1rem;
}

.page-news .signoff-media blockquote {
  margin: 0 0 0.9rem;
  padding: 0;
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.6;
  border-left: 3px solid var(--accent-red);
  padding-left: 1rem;
}

.page-news .signoff-note {
  font-size: 0.88rem;
  color: var(--stone);
  line-height: 1.75;
  margin-bottom: 1.2rem;
}

.page-news .signoff-aside {
  background: var(--cream);
  border: 1px solid var(--paper-line);
  padding: 1.5rem;
}

.page-news .signoff-line {
  width: 3.5rem;
  height: 3px;
  background: var(--accent-gold);
  margin-bottom: 1.25rem;
}

.page-news .signoff-aside-num {
  font-family: var(--font-mono);
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--accent-red);
  margin-bottom: 0.5rem;
}

.page-news .signoff-aside-label {
  font-size: 0.86rem;
  color: var(--stone);
  line-height: 1.7;
}

/* ===== 桌面端适配 ===== */
@media (min-width: 48rem) {
  .page-news .news-hero-inner {
    display: grid;
    grid-template-columns: 1fr 17rem;
    gap: 3rem;
    align-items: start;
  }

  .page-news .news-masthead h1 {
    font-size: clamp(2rem, 4vw, 3rem);
  }

  .page-news .news-index-note {
    margin-top: 1.5rem;
  }

  .page-news .timeline-item {
    display: grid;
    grid-template-columns: 9.5rem 1fr;
    gap: 2rem;
    border-left: none;
    padding: 0 0 3.25rem;
    position: relative;
  }

  .page-news .timeline-item::before {
    left: auto;
    top: auto;
    width: 0.8rem;
    height: 0.8rem;
  }

  .page-news .timeline-item::after {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: calc(9.5rem + 1rem);
    width: 2px;
    transform: translateX(-1px);
    background: var(--tl-line);
  }

  .page-news .timeline-item:last-child::after {
    bottom: auto;
    height: 1.25rem;
  }

  /* 圆点放在左栏边缘 */
  .page-news .timeline-item .timeline-date {
    position: relative;
    z-index: 1;
  }

  .page-news .timeline-item::before {
    content: "";
    position: absolute;
    left: calc(9.5rem + 1rem);
    top: 0.75rem;
    width: 0.8rem;
    height: 0.8rem;
    transform: translateX(-50%);
    border-radius: 50%;
    background: var(--tl-bullet);
    border: 2px solid var(--cream);
    z-index: 2;
  }

  .page-news .timeline-item.item-version::before { background: var(--accent-red); }
  .page-news .timeline-item.item-catalog::before { background: var(--sky-blue); }
  .page-news .timeline-item.item-cycle::before { background: var(--accent-gold); }
  .page-news .timeline-item.item-help::before { background: var(--clay); }

  .page-news .timeline-date {
    justify-content: flex-end;
    text-align: right;
    margin-bottom: 0;
    padding-top: 0.75rem;
    padding-right: 0.5rem;
  }

  .page-news .timeline-content h3 {
    font-size: 1.35rem;
  }

  .page-news .timeline-content p {
    font-size: 0.94rem;
  }

  .page-news .news-changelog {
    padding: 3rem 0 3.5rem;
  }

  .page-news .changelog-list {
    margin-top: 0;
  }

  .page-news .signoff-card {
    grid-template-columns: 1.4fr 1fr;
    align-items: center;
    gap: 2.5rem;
    padding: 2rem;
  }
}