/* ===== 页面专属：最新动态 ===== */
.page-news {
  --timeline-bar-width: 3px;
  --timeline-dot-size: 14px;
  --timeline-node-width: 40px;
  --card-radius: 8px;
  --card-shadow: 0 2px 12px rgba(0,0,0,0.06);
  --guide-gap: 1.5rem;
  --notes-gap: 1rem;
  display: block;
  width: 100%;
  background-color: var(--color-white, #F0F0F0);
  color: var(--color-text, #2C3E50);
  padding: 2rem 0 4rem;
  font-family: var(--font-body, Lora, Georgia, serif);
}

/* ---------- 容器 ---------- */
.page-news .container {
  max-width: var(--container-width, 1280px);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ---------- 面包屑 ---------- */
.page-news .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  margin-bottom: 1.5rem;
  color: var(--color-text, #2C3E50);
  opacity: 0.7;
}
.page-news .breadcrumb a {
  color: var(--color-primary, #C0392B);
  text-decoration: none;
  transition: opacity var(--transition, 0.3s ease);
}
.page-news .breadcrumb a:hover,
.page-news .breadcrumb a:focus {
  opacity: 0.7;
  text-decoration: underline;
}
.page-news .breadcrumb span[aria-current="page"] {
  font-weight: 600;
  color: var(--color-dark, #1A1A1A);
}

/* ---------- 控制面板 ---------- */
.page-news .control-panel {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 1rem;
  background-color: var(--color-dark, #1A1A1A);
  border-left: 4px solid var(--color-primary, #C0392B);
  margin-bottom: 2rem;
  font-size: 0.85rem;
}
.page-news .control-panel__label {
  color: var(--color-gold, #F1C40F);
  font-family: var(--font-heading, Montserrat Black, Impact, sans-serif);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.page-news .control-panel__path {
  color: var(--color-text-light, #ECF0F1);
  font-family: var(--font-body, Lora, Georgia, serif);
  font-weight: 400;
}

/* ---------- 页面标题 ---------- */
.page-news .page-title {
  font-family: var(--font-heading, Montserrat Black, Impact, sans-serif);
  font-size: 2.2rem;
  line-height: 1.1;
  margin: 0 0 0.5rem;
  color: var(--color-dark, #1A1A1A);
  letter-spacing: -0.02em;
}
.page-news .page-subtitle {
  font-size: 1rem;
  color: var(--color-text, #2C3E50);
  opacity: 0.75;
  margin: 0 0 3rem;
  border-bottom: 2px solid var(--color-primary, #C0392B);
  padding-bottom: 0.75rem;
  max-width: 36em;
}

/* ---------- 章节块 ---------- */
.page-news .section-block {
  margin-bottom: 4rem;
}
.page-news .section-header {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}
.page-news .section-number {
  font-family: var(--font-heading, Montserrat Black, Impact, sans-serif);
  font-size: 2.8rem;
  line-height: 1;
  color: var(--color-primary, #C0392B);
  opacity: 0.35;
  flex-shrink: 0;
}
.page-news .section-header h2 {
  font-family: var(--font-heading, Montserrat Black, Impact, sans-serif);
  font-size: 1.6rem;
  margin: 0;
  color: var(--color-dark, #1A1A1A);
  letter-spacing: -0.01em;
}
.page-news .section-intro {
  font-size: 0.95rem;
  margin: 0 0 2rem;
  padding-left: calc(2.8rem + 0.75rem);
  max-width: 48em;
  color: var(--color-text, #2C3E50);
  opacity: 0.8;
}

/* ---------- 时间线 ---------- */
.page-news .timeline {
  position: relative;
  padding-left: var(--timeline-node-width);
}
/* 竖线 */
.page-news .timeline::before {
  content: "";
  position: absolute;
  left: calc(var(--timeline-node-width) / 2 - var(--timeline-bar-width) / 2);
  top: 0;
  bottom: 0;
  width: var(--timeline-bar-width);
  background-color: var(--color-primary, #C0392B);
  border-radius: 2px;
}
.page-news .timeline__item {
  position: relative;
  display: flex;
  margin-bottom: 2.5rem;
}
.page-news .timeline__item:last-child {
  margin-bottom: 0;
}
/* 节点容器 */
.page-news .timeline__node {
  position: absolute;
  left: calc(-1 * var(--timeline-node-width));
  top: 0.5rem;
  width: var(--timeline-node-width);
  display: flex;
  justify-content: center;
  align-items: flex-start;
  z-index: 1;
}
.page-news .timeline__dot {
  display: block;
  width: var(--timeline-dot-size);
  height: var(--timeline-dot-size);
  border-radius: 50%;
  background-color: var(--color-primary, #C0392B);
  border: 3px solid var(--color-white, #F0F0F0);
  box-shadow: 0 0 0 2px var(--color-primary, #C0392B);
  transition: background-color var(--transition, 0.3s ease), transform var(--transition, 0.3s ease);
}
/* 内容区 */
.page-news .timeline__content {
  flex: 1;
  min-width: 0;
}

/* ---------- 卡片（时间线内） ---------- */
.page-news .card {
  background-color: #FFFFFF;
  border-radius: var(--card-radius);
  box-shadow: var(--card-shadow);
  padding: 1.25rem 1.5rem 1.5rem;
  position: relative;
  border-left: 4px solid var(--color-primary, #C0392B);
  transition: box-shadow var(--transition, 0.3s ease), transform var(--transition, 0.3s ease);
}
.page-news .card:hover {
  box-shadow: 0 4px 20px rgba(0,0,0,0.10);
  transform: translateY(-2px);
}
/* 悬停时圆点变亮 */
.page-news .timeline__item:hover .timeline__dot {
  background-color: var(--color-gold, #F1C40F);
  transform: scale(1.2);
  box-shadow: 0 0 0 2px var(--color-gold, #F1C40F);
}
.page-news .card__badge {
  margin-bottom: 0.75rem;
}
.page-news .card__badge-img {
  display: block;
  width: 80px;
  height: 80px;
  object-fit: contain;
  border-radius: 50%;
  background-color: var(--color-white, #F0F0F0);
}
.page-news .card__title {
  font-family: var(--font-heading, Montserrat Black, Impact, sans-serif);
  font-size: 1.25rem;
  margin: 0 0 0.5rem;
  color: var(--color-dark, #1A1A1A);
}
.page-news .card__summary {
  font-size: 0.95rem;
  line-height: 1.6;
  margin: 0 0 0.75rem;
  color: var(--color-text, #2C3E50);
}
/* 额外内容（可展开收起） */
.page-news .card__extra {
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition: max-height 0.45s ease, opacity 0.35s ease, margin 0.35s ease;
  margin-top: 0;
}
.page-news .card__extra p {
  font-size: 0.9rem;
  line-height: 1.7;
  margin: 0 0 1rem;
  color: var(--color-text, #2C3E50);
}
.page-news .card__inline-img {
  display: block;
  width: 100%;
  max-width: 300px;
  height: auto;
  border-radius: 4px;
  margin: 0 auto 0.5rem;
  border: 1px solid var(--color-border, #BDC3C7);
}
/* 展开状态 */
.page-news .card[data-open="true"] .card__extra {
  max-height: 600px;
  opacity: 1;
  margin-top: 1rem;
}
.page-news .card[data-open="true"] .card__toggle {
  color: var(--color-gold, #F1C40F);
}
.page-news .card[data-open="true"] .card__toggle::after {
  transform: rotate(180deg);
}
/* 切换按钮 */
.page-news .card__toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-body, Lora, Georgia, serif);
  font-size: 0.85rem;
  color: var(--color-primary, #C0392B);
  background: none;
  border: none;
  padding: 0.25rem 0;
  cursor: pointer;
  transition: color var(--transition, 0.3s ease);
  position: relative;
}
.page-news .card__toggle::after {
  content: "▾";
  font-size: 0.7rem;
  transition: transform var(--transition, 0.3s ease);
}
.page-news .card__toggle:hover,
.page-news .card__toggle:focus {
  color: var(--color-nav-hover, #D35400);
}

/* ---------- 第二章：使用指南网格 ---------- */
.page-news .guide-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--guide-gap);
  padding-left: calc(2.8rem + 0.75rem);
}
.page-news .guide-card {
  background-color: #FFFFFF;
  border-radius: var(--card-radius);
  padding: 1.25rem 1.5rem;
  box-shadow: var(--card-shadow);
  border-top: 3px solid var(--color-primary, #C0392B);
  transition: box-shadow var(--transition, 0.3s ease), transform var(--transition, 0.3s ease);
  display: flex;
  flex-direction: column;
}
.page-news .guide-card:hover {
  box-shadow: 0 4px 18px rgba(0,0,0,0.08);
  transform: translateY(-2px);
}
.page-news .guide-card__num {
  font-family: var(--font-heading, Montserrat Black, Impact, sans-serif);
  font-size: 1.8rem;
  color: var(--color-primary, #C0392B);
  opacity: 0.3;
  line-height: 1;
  margin-bottom: 0.25rem;
}
.page-news .guide-card__title {
  font-family: var(--font-heading, Montserrat Black, Impact, sans-serif);
  font-size: 1.05rem;
  margin: 0 0 0.4rem;
  color: var(--color-dark, #1A1A1A);
}
.page-news .guide-card__text {
  font-size: 0.9rem;
  line-height: 1.6;
  margin: 0;
  color: var(--color-text, #2C3E50);
  opacity: 0.85;
}

/* ---------- 第三章：更新说明列表 ---------- */
.page-news .notes-list {
  padding-left: calc(2.8rem + 0.75rem);
  display: flex;
  flex-direction: column;
  gap: var(--notes-gap);
}
.page-news .note-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  padding: 1rem 1.25rem;
  background-color: #FFFFFF;
  border-radius: 6px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.04);
  border-left: 3px solid var(--color-gold, #F1C40F);
  transition: box-shadow var(--transition, 0.3s ease);
}
.page-news .note-item:hover {
  box-shadow: 0 2px 10px rgba(0,0,0,0.07);
}
.page-news .note-item__marker {
  flex-shrink: 0;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--color-gold, #F1C40F);
  margin-top: 0.4rem;
}
.page-news .note-item__body {
  flex: 1;
  min-width: 0;
}
.page-news .note-item__title {
  font-family: var(--font-heading, Montserrat Black, Impact, sans-serif);
  font-size: 0.95rem;
  margin: 0 0 0.2rem;
  color: var(--color-dark, #1A1A1A);
}
.page-news .note-item__text {
  font-size: 0.85rem;
  line-height: 1.6;
  margin: 0;
  color: var(--color-text, #2C3E50);
  opacity: 0.8;
}

/* ---------- 底部流程图 ---------- */
.page-news .bottom-chart {
  margin: 3rem 0 2rem;
  padding-left: calc(2.8rem + 0.75rem);
}
.page-news .bottom-chart__img {
  display: block;
  width: 100%;
  max-width: 800px;
  height: auto;
  border-radius: 6px;
  border: 1px solid var(--color-border, #BDC3C7);
  background-color: #FFFFFF;
  object-fit: cover;
}

/* ---------- 内部导航 ---------- */
.page-news .page-context-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border, #BDC3C7);
  margin-top: 1rem;
}
.page-news .page-context-nav__label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-dark, #1A1A1A);
  margin-right: 0.25rem;
}
.page-news .btn {
  display: inline-flex;
  align-items: center;
  padding: 0.45rem 1rem;
  font-family: var(--font-body, Lora, Georgia, serif);
  font-size: 0.85rem;
  border-radius: 4px;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--transition, 0.3s ease), color var(--transition, 0.3s ease), border-color var(--transition, 0.3s ease);
  border: 1.5px solid transparent;
}
.page-news .btn--primary {
  background-color: var(--color-primary, #C0392B);
  color: #FFFFFF;
  border-color: var(--color-primary, #C0392B);
}
.page-news .btn--primary:hover,
.page-news .btn--primary:focus {
  background-color: var(--color-primary-dark, #A93226);
  border-color: var(--color-primary-dark, #A93226);
}

/* ===== 响应式：平板及以上 ===== */
@media (min-width: 640px) {
  .page-news {
    padding: 3rem 0 5rem;
  }
  .page-news .container {
    padding: 0 2rem;
  }
  .page-news .page-title {
    font-size: 3rem;
  }
  .page-news .page-subtitle {
    font-size: 1.1rem;
    margin-bottom: 4rem;
  }
  .page-news .section-number {
    font-size: 3.4rem;
  }
  .page-news .section-header h2 {
    font-size: 1.85rem;
  }
  .page-news .section-intro {
    font-size: 1rem;
    padding-left: calc(3.4rem + 0.75rem);
  }
  /* 时间线节点宽度稍宽 */
  .page-news .timeline {
    padding-left: 50px;
  }
  .page-news .timeline__node {
    width: 50px;
    left: -50px;
  }
  .page-news .timeline__dot {
    width: 16px;
    height: 16px;
  }
  /* 卡片内布局调整 */
  .page-news .card {
    padding: 1.5rem 2rem 1.75rem;
  }
  .page-news .card__title {
    font-size: 1.35rem;
  }
  .page-news .card__inline-img {
    max-width: 280px;
    margin: 0 0 0.5rem 1rem;
    float: right;
  }
  /* 使用指南网格两列 */
  .page-news .guide-grid {
    grid-template-columns: 1fr 1fr;
    padding-left: calc(3.4rem + 0.75rem);
  }
  .page-news .notes-list {
    padding-left: calc(3.4rem + 0.75rem);
  }
  .page-news .bottom-chart {
    padding-left: calc(3.4rem + 0.75rem);
  }
}

/* ===== 响应式：桌面 ===== */
@media (min-width: 1024px) {
  .page-news {
    padding: 4rem 0 6rem;
  }
  .page-news .container {
    padding: 0 3rem;
  }
  .page-news .page-title {
    font-size: 3.6rem;
  }
  .page-news .section-number {
    font-size: 4rem;
  }
  .page-news .section-header h2 {
    font-size: 2rem;
  }
  .page-news .section-intro {
    padding-left: calc(4rem + 1rem);
  }
  /* 时间线 */
  .page-news .timeline {
    padding-left: 60px;
  }
  .page-news .timeline__node {
    width: 60px;
    left: -60px;
  }
  .page-news .timeline__dot {
    width: 18px;
    height: 18px;
  }
  .page-news .card {
    padding: 1.75rem 2.25rem 2rem;
  }
  /* 指南网格三列 */
  .page-news .guide-grid {
    grid-template-columns: 1fr 1fr 1fr;
    padding-left: calc(4rem + 1rem);
    gap: 1.8rem;
  }
  .page-news .notes-list {
    padding-left: calc(4rem + 1rem);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.2rem;
  }
  .page-news .bottom-chart {
    padding-left: calc(4rem + 1rem);
  }
  .page-news .page-context-nav {
    padding-left: calc(4rem + 1rem);
  }
}

/* ===== 响应式：大桌面 ===== */
@media (min-width: 1280px) {
  .page-news .guide-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-news .notes-list {
    grid-template-columns: repeat(2, 1fr);
  }
}