.page-news {
  --color-timeline-line: var(--color-primary, #0A2540);
  --color-timeline-dot: var(--color-accent, #FF6F3C);
  --color-card-accent: var(--color-accent-light, #FF9F6E);
  --color-index-hover: var(--color-hover-overlay, rgba(255,111,60,0.08));
  --radius-timeline-card: var(--radius-card, 16px);
  --shadow-timeline-card: 0 4px 24px rgba(10,37,64,0.06);
  --timeline-dot-size: 18px;
  --timeline-line-width: 3px;
}

/* ===== 面包屑 ===== */
.page-news .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1.25rem 0 0.5rem;
  font-size: 0.875rem;
  color: var(--color-text-light, #7A8A9A);
  letter-spacing: 0.01em;
}

.page-news .breadcrumb-link {
  color: var(--color-text-medium, #3D4A5C);
  text-decoration: none;
  transition: color 0.25s ease;
}

.page-news .breadcrumb-link:hover {
  color: var(--color-accent, #FF6F3C);
}

.page-news .breadcrumb-separator {
  color: var(--color-border, #D4DCE5);
  font-size: 1.1rem;
}

.page-news .breadcrumb-item {
  color: var(--color-text-light, #7A8A9A);
  font-weight: 500;
}

/* ===== 框景首屏 ===== */
.page-news__hero {
  position: relative;
  margin: 0 0 1.5rem;
  padding: 2.5rem 1.5rem 2rem;
  background: var(--color-warm-white, #F9F9F7);
  border: 1px solid var(--color-border, #D4DCE5);
  border-radius: var(--radius-card, 16px);
  overflow: hidden;
}

.page-news__hero-inner {
  position: relative;
  z-index: 2;
  text-align: center;
}

.page-news__hero-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent, #FF6F3C);
  background: rgba(255,111,60,0.10);
  padding: 0.25rem 1rem;
  border-radius: var(--radius-pill, 100px);
  margin-bottom: 1rem;
}

.page-news__hero-title {
  font-size: 2.25rem;
  font-weight: var(--heading-weight, 800);
  letter-spacing: var(--letter-spacing-headings, -0.02em);
  color: var(--color-primary, #0A2540);
  margin: 0 0 0.75rem;
  line-height: 1.15;
}

.page-news__hero-desc {
  font-size: 1.05rem;
  color: var(--color-text-medium, #3D4A5C);
  line-height: var(--line-height-body, 1.6);
  max-width: 680px;
  margin: 0 auto 1.5rem;
}

.page-news__hero-deco {
  display: block;
  width: 100%;
  max-width: 600px;
  height: auto;
  margin: 0 auto;
  opacity: 0.55;
  object-fit: contain;
}

/* ===== 时间线区块 ===== */
.page-news__timeline {
  padding: 2.5rem 0 1rem;
}

.page-news__section-title {
  margin-top: 0.5rem;
  margin-bottom: 0.5rem;
}

.page-news__section-sub {
  margin-top: 0;
  margin-bottom: 2.25rem;
  color: var(--color-text-light, #7A8A9A);
  font-size: 1rem;
}

/* 时间线轨道 */
.page-news__timeline-track {
  position: relative;
  padding-left: 2rem;
}

.page-news__timeline-line {
  position: absolute;
  left: 6px;
  top: 0;
  bottom: 0;
  width: var(--timeline-line-width);
  background: linear-gradient(180deg, var(--color-primary, #0A2540) 0%, var(--color-accent, #FF6F3C) 100%);
  border-radius: 3px;
  opacity: 0.3;
}

.page-news__line-dot {
  position: absolute;
  left: 50%;
  width: var(--timeline-dot-size);
  height: var(--timeline-dot-size);
  background: var(--color-timeline-dot, #FF6F3C);
  border: 3px solid var(--color-warm-white, #F9F9F7);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  box-shadow: 0 0 0 2px var(--color-timeline-dot, #FF6F3C);
  z-index: 2;
}

/* 卡片 */
.page-news__card {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.5rem 1.5rem 1.5rem 3rem;
  margin-bottom: 1.75rem;
  background: var(--color-card-bg, #FFFFFF);
  border: 1px solid var(--color-border, #D4DCE5);
  border-radius: var(--radius-timeline-card);
  box-shadow: var(--shadow-timeline-card);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-news__card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(10,37,64,0.10);
}

.page-news__card--featured {
  border-left: 4px solid var(--color-accent, #FF6F3C);
  background: linear-gradient(135deg, var(--color-card-bg, #FFFFFF) 0%, rgba(255,111,60,0.03) 100%);
}

.page-news__card-marker {
  position: absolute;
  left: -1rem;
  top: 1.5rem;
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 800;
  color: var(--color-warm-white, #F9F9F7);
  background: var(--color-primary, #0A2540);
  border-radius: 50%;
  z-index: 3;
  box-shadow: 0 2px 8px rgba(10,37,64,0.15);
}

.page-news__card-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border-radius: 12px;
  object-fit: cover;
  background: var(--color-silver, #E0E6ED);
}

.page-news__card-body {
  flex: 1;
  min-width: 0;
}

.page-news__card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text, #121212);
  margin: 0 0 0.35rem;
  letter-spacing: -0.01em;
}

.page-news__card-text {
  font-size: 0.925rem;
  color: var(--color-text-medium, #3D4A5C);
  line-height: var(--line-height-body, 1.6);
  margin: 0;
}

/* ===== 版本说明入口 ===== */
.page-news__version-entry {
  padding: 1.5rem 0 2rem;
}

.page-news__version-card {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding: 2rem 1.5rem;
  background: linear-gradient(135deg, var(--color-primary, #0A2540) 0%, var(--color-primary-dark, #1A3A5C) 100%);
  border: none;
  border-radius: var(--radius-card, 16px);
  color: var(--color-warm-white, #F9F9F7);
  overflow: hidden;
}

.page-news__version-info {
  flex: 1;
}

.page-news__version-info .badge {
  background: rgba(255,111,60,0.20);
  color: var(--color-accent-light, #FF9F6E);
  border: 1px solid rgba(255,111,60,0.25);
}

.page-news__version-info .section-title {
  color: var(--color-warm-white, #F9F9F7);
  margin-top: 0.75rem;
  margin-bottom: 0.75rem;
}

.page-news__version-text {
  font-size: 0.95rem;
  color: rgba(249,249,247,0.80);
  line-height: var(--line-height-body, 1.6);
  margin: 0 0 1.5rem;
  max-width: 520px;
}

.page-news__version-btn {
  display: inline-block;
  background: var(--color-accent, #FF6F3C);
  color: var(--color-warm-white, #F9F9F7);
  border: none;
  padding: 0.65rem 2rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-pill, 100px);
  text-decoration: none;
  transition: background 0.25s ease, transform 0.2s ease;
}

.page-news__version-btn:hover {
  background: var(--color-accent-light, #FF9F6E);
  transform: scale(1.02);
}

.page-news__version-img {
  width: 100%;
  max-width: 360px;
  height: auto;
  border-radius: 12px;
  object-fit: cover;
  opacity: 0.85;
  align-self: center;
}

/* ===== 内容索引 ===== */
.page-news__index {
  padding: 2rem 0 3.5rem;
}

.page-news__index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.page-news__index-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--color-card-bg, #FFFFFF);
  border: 1px solid var(--color-border, #D4DCE5);
  border-radius: 12px;
  transition: background 0.25s ease, border-color 0.25s ease;
}

.page-news__index-item:hover {
  background: var(--color-index-hover);
  border-color: var(--color-accent-light, #FF9F6E);
}

.page-news__index-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  object-fit: cover;
  background: var(--color-silver, #E0E6ED);
}

.page-news__index-content {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.page-news__index-label {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text, #121212);
  margin-bottom: 0.1rem;
}

.page-news__index-desc {
  font-size: 0.8rem;
  color: var(--color-text-light, #7A8A9A);
}

.page-news__index-link {
  flex-shrink: 0;
  padding: 0.4rem 1.25rem;
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: var(--radius-pill, 100px);
  text-decoration: none;
  transition: background 0.25s ease, color 0.25s ease;
}

.page-news__index-link.btn-outline {
  border: 1.5px solid var(--color-border, #D4DCE5);
  color: var(--color-text-medium, #3D4A5C);
  background: transparent;
}

.page-news__index-link.btn-outline:hover {
  border-color: var(--color-accent, #FF6F3C);
  color: var(--color-accent, #FF6F3C);
  background: var(--color-hover-overlay);
}

/* ===== 响应式 ===== */
@media (max-width: 639px) {
  .page-news__hero {
    padding: 1.75rem 1rem 1.5rem;
    margin-left: -1rem;
    margin-right: -1rem;
    border-radius: 0;
  }

  .page-news__hero-title {
    font-size: 1.75rem;
  }

  .page-news__hero-desc {
    font-size: 0.925rem;
  }

  .page-news__timeline-track {
    padding-left: 1.25rem;
  }

  .page-news__timeline-line {
    left: 4px;
    width: 2px;
  }

  .page-news__line-dot {
    width: 14px;
    height: 14px;
    border-width: 2px;
  }

  .page-news__card {
    flex-direction: column;
    padding: 1.25rem 1rem 1.25rem 2.5rem;
    gap: 0.75rem;
  }

  .page-news__card-marker {
    left: -0.75rem;
    top: 1.25rem;
    width: 1.6rem;
    height: 1.6rem;
    font-size: 0.6rem;
  }

  .page-news__card-icon {
    width: 40px;
    height: 40px;
  }

  .page-news__card-title {
    font-size: 1rem;
  }

  .page-news__card-text {
    font-size: 0.875rem;
  }

  .page-news__version-card {
    padding: 1.5rem 1rem;
  }

  .page-news__version-text {
    font-size: 0.875rem;
  }

  .page-news__version-btn {
    width: 100%;
    text-align: center;
  }

  .page-news__version-img {
    max-width: 100%;
  }

  .page-news__index-item {
    flex-wrap: wrap;
    padding: 0.875rem 1rem;
  }

  .page-news__index-label {
    font-size: 0.875rem;
  }

  .page-news__index-desc {
    font-size: 0.75rem;
  }

  .page-news__index-link {
    width: 100%;
    text-align: center;
    padding: 0.5rem 0;
  }

  .breadcrumb {
    padding-left: 0;
    padding-right: 0;
    flex-wrap: wrap;
  }
}

@media (min-width: 640px) {
  .page-news__hero {
    padding: 3rem 2.5rem 2.5rem;
  }

  .page-news__hero-title {
    font-size: 2.75rem;
  }

  .page-news__timeline-track {
    padding-left: 3rem;
  }

  .page-news__timeline-line {
    left: 10px;
  }

  .page-news__card {
    padding: 1.75rem 2rem 1.75rem 3.5rem;
    gap: 1.25rem;
  }

  .page-news__card-marker {
    left: -1.25rem;
    top: 1.75rem;
    width: 2.4rem;
    height: 2.4rem;
    font-size: 0.8rem;
  }

  .page-news__card-icon {
    width: 56px;
    height: 56px;
  }

  .page-news__card-title {
    font-size: 1.2rem;
  }

  .page-news__version-card {
    flex-direction: row;
    align-items: center;
    padding: 2.5rem 3rem;
  }

  .page-news__version-img {
    max-width: 280px;
  }

  .page-news__index-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.875rem;
  }

  .page-news__index-item {
    padding: 1rem 1.25rem;
  }
}

@media (min-width: 1024px) {
  .page-news__hero-title {
    font-size: 3.25rem;
  }

  .page-news__timeline-track {
    padding-left: 4rem;
    max-width: 820px;
    margin-left: auto;
    margin-right: auto;
  }

  .page-news__card {
    padding: 2rem 2.5rem 2rem 4rem;
  }

  .page-news__version-card {
    padding: 3rem 4rem;
  }

  .page-news__version-img {
    max-width: 320px;
  }

  .page-news__index-list {
    grid-template-columns: repeat(3, 1fr);
  }
}