.page-news {
  --clr-accent: #FFD700;
  --clr-primary: #D32F2F;
  --clr-bg-light: #FAF0E6;
  --clr-text: #1A1A1A;
  --clr-border: #E0E0E0;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 3rem;
  --space-xl: 5rem;
  --radius-card: 16px;
  --shadow-card: 0 4px 24px rgba(0,0,0,0.08);
  --font-head: 'Segoe UI','Arial Black',sans-serif;
  --font-body: 'Segoe UI','Helvetica Neue',Arial,sans-serif;
  display: block;
  background: var(--clr-bg-light);
  padding: 0 0 var(--space-xl);
}
/* 页面头部 */
.page-news__intro {
  padding-top: 4rem;
  padding-bottom: 1rem;
}
.page-news__title {
  font-family: var(--font-head);
  font-size: 3rem;
  font-weight: 900;
  color: var(--clr-text);
  margin: 0.5rem 0 0.25rem;
  letter-spacing: 0.02em;
  line-height: 1.1;
}
.page-news__desc {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: #555;
  max-width: 680px;
  margin: 0.5rem 0 0;
}
/* 时间轴顶部装饰图 */
.page-news__timeline-top {
  margin: 0 auto var(--space-lg);
  max-width: 800px;
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}
.page-news__hero-img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
/* 章节标题覆盖 */
.page-news__section-title {
  margin-bottom: var(--space-lg);
}
/* 时间轴轨道 */
.page-news__timeline {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1.25rem;
  position: relative;
}
.page-news__timeline-track {
  position: relative;
  padding-left: 3.5rem;
}
.page-news__timeline-line {
  position: absolute;
  left: 1.5rem;
  top: 0;
  bottom: 0;
  width: 3px;
  background: repeating-linear-gradient(
    135deg,
    var(--clr-primary) 0px,
    var(--clr-primary) 6px,
    transparent 6px,
    transparent 10px
  );
  border-radius: 2px;
}
/* 单条条目 */
.page-news__entry {
  position: relative;
  margin-bottom: var(--space-lg);
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 1rem;
}
.page-news__entry:last-child {
  margin-bottom: 0;
}
/* 羽翼标记 */
.page-news__entry-marker {
  position: absolute;
  left: -3.5rem;
  top: 0.25rem;
  width: 32px;
  height: 32px;
  z-index: 2;
}
.page-news__entry-marker svg {
  display: block;
  width: 100%;
  height: 100%;
  filter: drop-shadow(0 2px 6px rgba(211,47,47,0.3));
}
/* 日期标签 */
.page-news__entry-date {
  flex: 0 0 auto;
  min-width: 5rem;
  text-align: right;
  padding-top: 0.15rem;
}
.page-news__entry-day {
  display: block;
  font-family: var(--font-head);
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--clr-primary);
  line-height: 1.2;
}
.page-news__entry-month {
  display: block;
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 600;
  color: #888;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
/* 卡片 */
.page-news__entry-card {
  flex: 1 1 300px;
  background: #fff;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition);
}
.page-news__entry-card:hover {
  box-shadow: 0 8px 32px rgba(0,0,0,0.12);
}
.page-news__entry-card-inner {
  padding: 1.25rem 1.5rem;
}
.page-news__entry-version {
  font-family: var(--font-head);
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--clr-primary);
  margin: 0 0 0.3rem;
  letter-spacing: 0.02em;
}
.page-news__entry-summary {
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--clr-text);
  margin: 0 0 0.75rem;
}
.page-news__entry-list {
  list-style: none;
  padding: 0;
  margin: 0 0 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.page-news__entry-list li {
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: #555;
  padding-left: 1.2rem;
  position: relative;
}
.page-news__entry-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--clr-primary);
  font-weight: 700;
}
/* 额外详情区域 */
.page-news__entry-extra {
  display: none;
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--clr-border);
  font-family: var(--font-body);
  font-size: 0.9rem;
  line-height: 1.6;
  color: #444;
}
.page-news__entry-extra[data-open] {
  display: block;
}
.page-news__entry-img {
  display: block;
  width: 100%;
  max-width: 150px;
  height: auto;
  border-radius: 8px;
  margin-top: 0.75rem;
  object-fit: cover;
}
/* 展开按钮 */
.page-news__entry-toggle {
  display: inline-block;
  background: none;
  border: none;
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--clr-primary);
  cursor: pointer;
  padding: 0.25rem 0;
  transition: color var(--transition);
  position: relative;
}
.page-news__entry-toggle::after {
  content: " ›";
  font-size: 1.1rem;
  transition: transform var(--transition);
  display: inline-block;
}
.page-news__entry-toggle[aria-expanded="true"]::after {
  transform: rotate(90deg);
}
.page-news__entry-toggle:hover {
  color: #b71c1c;
}
/* 订阅区 */
.page-news__subscribe {
  max-width: 900px;
  margin: var(--space-xl) auto 0;
  padding: 0 1.25rem;
}
.page-news__subscribe-inner {
  background: #fff;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: var(--space-lg) var(--space-md);
  text-align: center;
}
.page-news__subscribe-title {
  margin-bottom: 0.5rem;
}
.page-news__subscribe-desc {
  font-family: var(--font-body);
  font-size: 1rem;
  color: #555;
  max-width: 520px;
  margin: 0 auto var(--space-md);
  line-height: 1.5;
}
.page-news__subscribe-box {
  background: var(--clr-bg-light);
  border-radius: 12px;
  padding: 1.5rem 2rem;
  max-width: 600px;
  margin: 0 auto;
}
.page-news__subscribe-label {
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--clr-text);
  margin: 0 0 1rem;
}
.page-news__subscribe-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 0.75rem;
}
.page-news__subscribe-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.8rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  background: var(--clr-primary);
  border: none;
  border-radius: 50px;
  text-decoration: none;
  transition: background var(--transition), transform var(--transition);
  cursor: pointer;
}
.page-news__subscribe-btn:hover {
  background: #b71c1c;
  transform: translateY(-2px);
}
.page-news__subscribe-hint {
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: #888;
}
.page-news__subscribe-link {
  color: var(--clr-primary);
  text-decoration: underline;
  font-weight: 600;
}
.page-news__subscribe-note {
  font-family: var(--font-body);
  font-size: 0.8rem;
  color: #999;
  margin: 0.5rem 0 0;
}
.page-news__subscribe-note a {
  color: var(--clr-primary);
  text-decoration: underline;
}
/* 动画显现 */
.page-news__entry[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.22,1,0.36,1), transform 0.6s cubic-bezier(0.22,1,0.36,1);
}
.page-news__entry[data-reveal][data-visible] {
  opacity: 1;
  transform: translateY(0);
}
/* 移动端适配 */
@media (max-width: 639px) {
  .page-news__intro {
    padding-top: 2.5rem;
  }
  .page-news__title {
    font-size: 2rem;
  }
  .page-news__desc {
    font-size: 0.9rem;
  }
  .page-news__timeline-track {
    padding-left: 2.5rem;
  }
  .page-news__timeline-line {
    left: 0.75rem;
  }
  .page-news__entry-marker {
    left: -2.5rem;
    width: 24px;
    height: 24px;
  }
  .page-news__entry-marker svg {
    width: 24px;
    height: 24px;
  }
  .page-news__entry-date {
    min-width: 3.5rem;
  }
  .page-news__entry-day {
    font-size: 1.1rem;
  }
  .page-news__entry-month {
    font-size: 0.7rem;
  }
  .page-news__entry-card-inner {
    padding: 1rem 1.25rem;
  }
  .page-news__entry-version {
    font-size: 1.1rem;
  }
  .page-news__entry-summary {
    font-size: 0.85rem;
  }
  .page-news__entry-list li {
    font-size: 0.8rem;
  }
  .page-news__subscribe-inner {
    padding: var(--space-md) 1rem;
  }
  .page-news__subscribe-box {
    padding: 1.25rem 1rem;
  }
  .page-news__subscribe-actions {
    flex-direction: column;
    gap: 0.75rem;
  }
  .page-news__subscribe-btn {
    width: 100%;
    padding: 0.7rem 1.2rem;
    font-size: 0.9rem;
  }
  .page-news__subscribe-hint {
    font-size: 0.8rem;
  }
  .page-news__entry-img {
    max-width: 120px;
  }
}
@media (min-width: 640px) and (max-width: 1023px) {
  .page-news__title {
    font-size: 2.6rem;
  }
  .page-news__timeline-track {
    padding-left: 3rem;
  }
  .page-news__entry-marker {
    left: -3rem;
  }
  .page-news__entry-date {
    min-width: 4.2rem;
  }
  .page-news__entry-day {
    font-size: 1.3rem;
  }
}
@media (prefers-reduced-motion: reduce) {
  .page-news__entry[data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .page-news__entry-card,
  .page-news__subscribe-btn {
    transition: none;
  }
  .page-news__entry-card:hover {
    box-shadow: var(--shadow-card);
  }
  .page-news__subscribe-btn:hover {
    transform: none;
  }
}