/* =============================================
   page-news 专属样式
   作用域限定，移动端优先
   ============================================= */
.page-news {
  --news-gold: var(--color-primary, #D4AF37);
  --news-gold-light: var(--color-primary-light, #F9E79F);
  --news-blue: var(--color-secondary, #1A237E);
  --news-accent: var(--color-accent, #FF6F00);
  --news-dark: var(--color-bg-dark, #0D1B2A);
  --news-light: var(--color-bg-light, #F5F5F5);
  --news-text: var(--color-text, #212121);
  --news-text-muted: var(--color-text-secondary, #757575);
  --news-border: var(--color-border, #B0BEC5);
  --news-white: var(--color-white, #FFFFFF);
  --news-font: var(--font-primary, 'Noto Sans SC', sans-serif);
  --news-font-serif: var(--font-secondary, 'Noto Serif SC', serif);
  --news-radius: var(--border-radius, 16px);
  --news-border-w: var(--border-width, 6px);
  --news-shadow: var(--shadow-strong, 0 8px 24px rgba(0,0,0,0.25));
  --news-shadow-hover: var(--shadow-hover, 0 12px 32px rgba(0,0,0,0.35));
  --news-trans: var(--transition-base, 0.3s cubic-bezier(0.4,0,0.2,1));
  --news-max-w: var(--max-width, 1280px);
  --news-dot-size: 24px;
  --news-rail-w: 4px;
}

/* ---- 面包屑 ---- */
.page-news .breadcrumb {
  padding-top: 16px;
  padding-bottom: 8px;
}
.page-news .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--news-font);
  font-size: 0.8125rem;
  color: var(--news-text-muted);
}
.page-news .breadcrumb__item {
  display: flex;
  align-items: center;
  gap: 8px;
}
.page-news .breadcrumb__item + .breadcrumb__item::before {
  content: "›";
  color: var(--news-gold);
  font-weight: 700;
  font-size: 1.1em;
}
.page-news .breadcrumb__link {
  color: var(--news-gold);
  text-decoration: none;
  transition: color var(--news-trans);
}
.page-news .breadcrumb__link:hover,
.page-news .breadcrumb__link:focus-visible {
  color: var(--news-accent);
  text-decoration: underline;
}

/* ---- Hero ---- */
.page-news .page-news__hero {
  position: relative;
  background: var(--news-dark);
  border-bottom: var(--news-border-w) solid var(--news-gold);
  overflow: hidden;
}
.page-news .page-news__hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(212,175,55,0.12) 0%, rgba(26,35,126,0.25) 100%);
  pointer-events: none;
}
.page-news .page-news__hero-inner {
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding-top: 24px;
  padding-bottom: 32px;
  position: relative;
  z-index: 1;
}
.page-news .page-news__hero-text {
  flex: 1 1 auto;
}
.page-news .page-news__hero-kicker {
  display: inline-block;
  font-family: var(--news-font);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--news-gold);
  background: rgba(212,175,55,0.15);
  padding: 4px 12px;
  border-radius: 4px;
  margin-bottom: 12px;
}
.page-news .page-news__hero-title {
  font-family: var(--news-font);
  font-size: 2.25rem;
  font-weight: 900;
  color: var(--news-white);
  margin: 0 0 8px;
  line-height: 1.15;
  text-shadow: 0 2px 8px rgba(0,0,0,0.3);
}
.page-news .page-news__hero-desc {
  font-family: var(--news-font-serif);
  font-size: 1rem;
  font-weight: 400;
  color: var(--news-gold-light);
  max-width: 640px;
  margin: 0;
  line-height: 1.6;
}
.page-news .page-news__hero-visual {
  flex: 0 0 auto;
  border-radius: var(--news-radius);
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0,0,0,0.4);
  max-width: 100%;
}
.page-news .page-news__hero-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  min-height: 120px;
}
.page-news .page-news__hero-bar {
  height: 6px;
  background: linear-gradient(90deg, var(--news-gold), var(--news-accent), var(--news-gold));
  background-size: 200% 100%;
  animation: pageNewsBarShimmer 4s ease-in-out infinite;
}
@keyframes pageNewsBarShimmer {
  0%, 100% { background-position: 0% 0%; }
  50% { background-position: 100% 0%; }
}

/* ---- 时间线容器 ---- */
.page-news .timeline {
  position: relative;
  padding-top: 40px;
  padding-bottom: 48px;
}
.page-news .timeline__rail {
  display: none;
}

/* ---- 每个章节 ---- */
.page-news .timeline__chapter {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 48px;
  padding-left: 32px;
}
.page-news .timeline__chapter:last-of-type {
  margin-bottom: 32px;
}

/* 左侧竖线（移动端用伪元素） */
.page-news .timeline__chapter::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: var(--news-rail-w);
  background: linear-gradient(180deg, var(--news-gold), var(--news-accent));
  border-radius: 4px;
  opacity: 0.5;
}

/* 标记区：编号 + 圆点 */
.page-news .timeline__chapter-marker {
  display: flex;
  align-items: center;
  gap: 12px;
  position: relative;
  z-index: 2;
}
.page-news .timeline__chapter-number {
  font-family: var(--news-font);
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--news-gold);
  line-height: 1;
  letter-spacing: -0.02em;
  background: var(--news-dark);
  padding: 0 6px;
  border-radius: 4px;
}
.page-news .timeline__chapter-dot {
  display: block;
  width: var(--news-dot-size);
  height: var(--news-dot-size);
  border-radius: 50%;
  background: var(--news-gold);
  border: 4px solid var(--news-dark);
  box-shadow: 0 0 0 2px var(--news-gold), var(--news-shadow);
  flex-shrink: 0;
  position: relative;
  z-index: 2;
}

/* 章节标题区 */
.page-news .timeline__chapter-heading {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 16px;
  margin: 0 0 16px;
}
.page-news .timeline__chapter-label {
  font-family: var(--news-font);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--news-text);
  letter-spacing: 0.02em;
}
.page-news .timeline__chapter-badge {
  display: inline-block;
  font-family: var(--news-font);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 3px 12px;
  border-radius: 20px;
  background: var(--news-gold);
  color: var(--news-dark);
  border: 2px solid var(--news-gold);
}

/* 卡片网格 */
.page-news .timeline__chapter-content {
  flex: 1 1 100%;
}
.page-news .timeline__cards {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* ---- 卡片通用 ---- */
.page-news .card {
  background: var(--news-white);
  border: var(--news-border-w) solid var(--news-border);
  border-radius: var(--news-radius);
  box-shadow: var(--news-shadow);
  transition: transform var(--news-trans), box-shadow var(--news-trans);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.page-news .card:hover,
.page-news .card:focus-within {
  transform: translateY(-6px);
  box-shadow: var(--news-shadow-hover);
  border-color: var(--news-gold);
}
.page-news .card--highlight {
  border-color: var(--news-gold);
  background: linear-gradient(135deg, var(--news-white), rgba(212,175,55,0.05));
}
.page-news .card--highlight:hover,
.page-news .card--highlight:focus-within {
  border-color: var(--news-accent);
}

/* 卡片图片 */
.page-news .card__img-wrap {
  width: 100%;
  overflow: hidden;
  border-bottom: 3px solid var(--news-gold-light);
  background: var(--news-dark);
}
.page-news .card__img-wrap--horizontal {
  max-height: 180px;
}
.page-news .card__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  transition: transform var(--news-trans);
  min-height: 100px;
}
.page-news .card:hover .card__img,
.page-news .card:focus-within .card__img {
  transform: scale(1.03);
}

/* 卡片正文 */
.page-news .card__body {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.page-news .card__tag {
  display: inline-block;
  align-self: flex-start;
  font-family: var(--news-font);
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 3px 10px;
  border-radius: 4px;
  color: var(--news-white);
  margin-bottom: 12px;
  border: 1px solid transparent;
}
.page-news .card__tag--update { background: var(--news-gold); color: var(--news-dark); border-color: var(--news-gold); }
.page-news .card__tag--archive { background: var(--news-blue); color: var(--news-white); }
.page-news .card__tag--preview { background: var(--news-accent); color: var(--news-white); }
.page-news .card__tag--feature { background: var(--news-dark); color: var(--news-gold-light); border-color: var(--news-gold); }
.page-news .card__tag--new { background: var(--news-gold); color: var(--news-dark); }
.page-news .card__tag--info { background: var(--news-text-muted); color: var(--news-white); }

.page-news .card__title {
  font-family: var(--news-font);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--news-text);
  margin: 0 0 8px;
  line-height: 1.3;
}
.page-news .card__text {
  font-family: var(--news-font-serif);
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--news-text-muted);
  line-height: 1.65;
  margin: 0 0 16px;
  flex: 1;
}
.page-news .card__list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}
.page-news .card__list li {
  font-family: var(--news-font-serif);
  font-size: 0.875rem;
  color: var(--news-text);
  line-height: 1.5;
  padding-left: 20px;
  position: relative;
}
.page-news .card__list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--news-gold);
  font-weight: 700;
}
.page-news .card__list--compact li {
  font-size: 0.8rem;
  padding-left: 16px;
}
.page-news .card__list--compact li::before {
  content: "·";
  color: var(--news-accent);
  font-weight: 900;
}

.page-news .card__cta {
  align-self: flex-start;
  margin-top: 4px;
  font-family: var(--news-font);
  font-size: 0.8125rem;
  font-weight: 700;
  padding: 8px 20px;
  border-radius: 8px;
  text-decoration: none;
  transition: background var(--news-trans), color var(--news-trans), transform var(--news-trans);
  border: 2px solid transparent;
}
.page-news .card__cta:hover,
.page-news .card__cta:focus-visible {
  transform: translateY(-2px);
}
.page-news .btn-primary {
  background: var(--news-blue);
  color: var(--news-white);
  border-color: var(--news-blue);
}
.page-news .btn-primary:hover,
.page-news .btn-primary:focus-visible {
  background: var(--news-dark);
  border-color: var(--news-gold);
  color: var(--news-gold-light);
}
.page-news .btn-accent {
  background: var(--news-accent);
  color: var(--news-white);
  border-color: var(--news-accent);
}
.page-news .btn-accent:hover,
.page-news .btn-accent:focus-visible {
  background: var(--news-dark);
  border-color: var(--news-accent);
  color: var(--news-accent);
}
.page-news .btn-outline {
  background: transparent;
  color: var(--news-blue);
  border-color: var(--news-blue);
}
.page-news .btn-outline:hover,
.page-news .btn-outline:focus-visible {
  background: var(--news-blue);
  color: var(--news-white);
}

/* ---- 底部信任声明 ---- */
.page-news .timeline__footer-note {
  margin-top: 16px;
  padding-top: 24px;
  border-top: 2px solid var(--news-gold-light);
}
.page-news .timeline__footer-text {
  font-family: var(--news-font-serif);
  font-size: 0.85rem;
  color: var(--news-text-muted);
  text-align: center;
  max-width: 680px;
  margin: 0 auto;
  line-height: 1.7;
  font-style: italic;
}

/* ============ 桌面端 (min-width: 768px) ============ */
@media (min-width: 768px) {
  .page-news .breadcrumb {
    padding-top: 20px;
    padding-bottom: 12px;
  }
  .page-news .breadcrumb__list {
    font-size: 0.875rem;
  }

  /* Hero 并排 */
  .page-news .page-news__hero-inner {
    flex-direction: row;
    align-items: center;
    gap: 40px;
    padding-top: 40px;
    padding-bottom: 48px;
  }
  .page-news .page-news__hero-text {
    flex: 1 1 55%;
  }
  .page-news .page-news__hero-title {
    font-size: 3rem;
  }
  .page-news .page-news__hero-desc {
    font-size: 1.05rem;
  }
  .page-news .page-news__hero-visual {
    flex: 1 1 40%;
    max-width: 480px;
  }
  .page-news .page-news__hero-img {
    min-height: 180px;
  }

  /* 时间线布局强化 */
  .page-news .timeline {
    padding-top: 56px;
    padding-bottom: 64px;
  }

  /* 每个章节改为 flex 行 */
  .page-news .timeline__chapter {
    flex-direction: row;
    gap: 32px;
    padding-left: 0;
    margin-bottom: 64px;
  }
  .page-news .timeline__chapter::before {
    display: none;
  }

  /* 全局竖轨（桌面用） */
  .page-news .timeline__rail {
    display: block;
    position: absolute;
    left: 120px;
    top: 0;
    bottom: 0;
    width: var(--news-rail-w);
    background: linear-gradient(180deg, var(--news-gold), var(--news-accent), var(--news-gold));
    border-radius: 4px;
    opacity: 0.3;
    z-index: 0;
  }

  /* 标记区改为纵向排列 */
  .page-news .timeline__chapter-marker {
    flex-direction: column;
    align-items: center;
    gap: 8px;
    width: 80px;
    flex-shrink: 0;
    padding-top: 4px;
  }
  .page-news .timeline__chapter-number {
    font-size: 2rem;
    background: transparent;
    padding: 0;
  }
  .page-news .timeline__chapter-dot {
    width: 28px;
    height: 28px;
    border-width: 5px;
  }

  /* 内容区占剩余空间 */
  .page-news .timeline__chapter-content {
    flex: 1 1 0;
    min-width: 0;
  }

  /* 卡片网格行 */
  .page-news .timeline__cards {
    flex-direction: row;
    flex-wrap: wrap;
  }

  /* 栅格辅助类 */
  .page-news .col-12 { width: 100%; }
  .page-news .col-7 { width: calc(7/12 * 100% - 10px); }
  .page-news .col-6 { width: calc(50% - 10px); }
  .page-news .col-5 { width: calc(5/12 * 100% - 10px); }
  .page-news .col-4 { width: calc(4/12 * 100% - 10px); }
  .page-news .col-8 { width: calc(8/12 * 100% - 10px); }
  .page-news .col-3 { width: calc(25% - 10px); }

  .page-news .card__title {
    font-size: 1.2rem;
  }
  .page-news .card__img-wrap--horizontal {
    max-height: 200px;
  }
}

/* ============ 大桌面 (min-width: 1024px) ============ */
@media (min-width: 1024px) {
  .page-news .page-news__hero-title {
    font-size: 3.5rem;
  }
  .page-news .page-news__hero-visual {
    max-width: 560px;
  }
  .page-news .timeline__chapter-number {
    font-size: 2.5rem;
  }
  .page-news .timeline__chapter {
    gap: 48px;
    margin-bottom: 80px;
  }
  .page-news .timeline__chapter-label {
    font-size: 1.5rem;
  }
  .page-news .card__body {
    padding: 24px;
  }
  .page-news .card__title {
    font-size: 1.3rem;
  }
  .page-news .card__text {
    font-size: 0.9375rem;
  }
}

/* ============ 极窄屏安全 (max-width: 360px) ============ */
@media (max-width: 360px) {
  .page-news .page-news__hero-title {
    font-size: 1.6rem;
  }
  .page-news .timeline__chapter {
    padding-left: 24px;
  }
  .page-news .timeline__chapter-number {
    font-size: 1.2rem;
  }
  .page-news .timeline__chapter-dot {
    width: 18px;
    height: 18px;
    border-width: 3px;
  }
  .page-news .card__body {
    padding: 14px;
  }
  .page-news .card__title {
    font-size: 0.95rem;
  }
}