.page-news {
  --news-side: 6.5rem;
  --news-gap: 1rem;
  background: var(--color-primary);
  color: var(--color-text);
  overflow-x: hidden;
}

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

.page-news [id] {
  scroll-margin-top: calc(var(--header-height) + 1.5rem);
}

.page-news .breadcrumb {
  margin-bottom: 0.5rem;
}

/* ---------- 首屏主题进入 ---------- */
.page-news__intro {
  padding: 2.5rem 0 3rem;
}

.page-news__kicker {
  font-family: var(--font-data);
  font-size: 0.8125rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 0.75rem;
}

.page-news__intro h1 {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 1.12;
  margin: 0 0 1.25rem;
  max-width: 14em;
}

.page-news__lead {
  color: var(--color-text-muted);
  font-size: 1.0625rem;
  line-height: 1.8;
  max-width: 42rem;
  margin: 0 0 1.75rem;
}

.page-news__intro-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 2rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-border);
}

.page-news__intro-meta span {
  position: relative;
  font-family: var(--font-data);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  padding-left: 0.875rem;
}

.page-news__intro-meta span::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 0.375rem;
  height: 0.375rem;
  background: var(--color-accent);
}

/* ---------- 最新更新横幅 ---------- */
.page-news__featured {
  padding-bottom: 3rem;
}

.page-news__featured-card {
  display: grid;
  grid-template-columns: 1fr;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

.page-news__featured-img {
  width: 100%;
  object-fit: cover;
}

.page-news__featured-body {
  padding: 1.75rem 1.5rem;
}

.page-news__featured-body h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.375rem, 2vw, 2rem);
  line-height: 1.25;
  margin: 0.75rem 0 0.875rem;
}

.page-news__featured-body p {
  color: var(--color-text-muted);
  line-height: 1.75;
  margin: 0 0 1.25rem;
}

.page-news__featured-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ---------- 章节标题微调 ---------- */
.page-news .section-heading {
  margin-bottom: 1.75rem;
}

/* ---------- 按主题筛选 ---------- */
.page-news__updates {
  padding: 3rem 0 1rem;
}

.page-news__filterbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
  margin-bottom: 2rem;
}

.page-news__filter {
  display: inline-block;
  padding: 0.5rem 1.125rem;
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text-muted);
  font-family: var(--font-body);
  font-size: 0.875rem;
  line-height: 1.4;
  text-decoration: none;
  transition: border-color var(--transition), background var(--transition), color var(--transition);
}

.page-news__filter:hover,
.page-news__filter:focus {
  border-color: var(--color-accent);
  color: var(--color-text);
}

.page-news__filter.is-active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-primary);
  font-weight: 600;
}

/* ---------- 时间线 ---------- */
.page-news__timeline {
  position: relative;
  border-left: 1px solid var(--color-border);
  padding-left: 1.5rem;
}

.page-news__entry {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.5rem 1.5rem;
  padding: 0 0 2.5rem;
}

.page-news__entry::before {
  content: "";
  position: absolute;
  left: -1.5rem;
  top: 0.375rem;
  width: 0.625rem;
  height: 0.625rem;
  margin-left: -0.3125rem;
  background: var(--color-accent);
  transform: rotate(45deg);
  border-radius: 1px;
}

.page-news__entry-time span {
  font-family: var(--font-data);
  font-size: 0.8125rem;
  color: var(--color-accent);
  letter-spacing: 0.05em;
}

.page-news__entry-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.page-news__entry-body h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  line-height: 1.4;
  margin: 0 0 0.75rem;
}

.page-news__entry-body p {
  color: var(--color-text-muted);
  line-height: 1.75;
  margin: 0 0 1rem;
  max-width: 60ch;
}

.page-news__entry-media {
  margin: 1.25rem 0 0.25rem;
}

.page-news__entry-media img {
  width: 100%;
  object-fit: cover;
  border: 1px solid var(--color-border);
}

/* ---------- 热门更新 ---------- */
.page-news__popular {
  background: var(--color-primary-dark);
  padding: 3rem 0;
  margin-top: 2rem;
}

.page-news__popular-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--news-gap);
}

.page-news__popular-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.25rem;
  padding: 1.5rem 1.25rem;
  background: var(--color-surface);
  color: var(--color-text);
  text-decoration: none;
  transition: background var(--transition), transform var(--transition);
}

.page-news__popular-item:hover,
.page-news__popular-item:focus {
  background: var(--color-primary-light);
  transform: translateX(0.25rem);
}

.page-news__popular-num {
  font-family: var(--font-data);
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1;
  color: var(--color-accent-gold);
}

.page-news__popular-text h3 {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  margin: 0.5rem 0 0.375rem;
}

.page-news__popular-text p {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  line-height: 1.6;
  margin: 0;
}

/* ---------- 历史归档 ---------- */
.page-news__archive {
  padding: 3rem 0 4rem;
}

.page-news__archive-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}

.page-news__archive-group {
  margin-bottom: 2rem;
}

.page-news__archive-group > h3 {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  margin: 0 0 1rem;
  padding-bottom: 0.625rem;
  border-bottom: 1px solid var(--color-border);
  position: relative;
}

.page-news__archive-group > h3::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 2.5rem;
  height: 2px;
  background: var(--color-accent);
}

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

.page-news__archive-list li {
  display: grid;
  grid-template-columns: 6rem 1fr;
  gap: 0.875rem;
  padding: 0.75rem 0;
  border-bottom: 1px dashed var(--color-border);
}

.page-news__archive-list a {
  color: var(--color-text);
  text-decoration: none;
}

.page-news__archive-list a:hover {
  color: var(--color-accent);
}

.page-news__archive-time {
  font-family: var(--font-data);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  padding-top: 0.1875rem;
}

.page-news__archive-figure img {
  width: 100%;
  object-fit: cover;
  border: 1px solid var(--color-border);
}

.page-news__archive-figure p {
  font-family: var(--font-data);
  font-size: 0.875rem;
  color: var(--color-accent);
  margin: 0.875rem 0 0;
}

/* ---------- 桌面端 ---------- */
@media (min-width: 768px) {
  .page-news__featured-card {
    grid-template-columns: 1.5fr 1fr;
  }

  .page-news__featured-body {
    padding: 2.5rem;
  }

  .page-news__updates {
    padding: 4rem 0 1.5rem;
  }

  .page-news__entry {
    grid-template-columns: var(--news-side) 1fr;
    gap: 2rem;
  }

  .page-news__entry-time {
    text-align: right;
  }

  .page-news__popular-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
  }

  .page-news__popular-item {
    padding: 1.75rem 1.5rem;
  }

  .page-news__archive-grid {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 3rem;
  }

  .page-news__archive-figure {
    position: sticky;
    top: calc(var(--header-height) + 2rem);
    align-self: start;
  }

  .page-news__archive-list li {
    grid-template-columns: 7rem 1fr;
  }
}