/* =============================================
   page-news – 最新动态页面
   作用域限定：所有选择器以 .page-news 为前缀
   移动端优先 + 桌面端媒体查询
   ============================================= */

/* ---- 布局容器 ---- */
.page-news {
  --news-max-w: 1120px;
  --timeline-point-w: 2.5rem;
  --timeline-line-color: var(--deep-blue);
  --timeline-dot-color: var(--red-orange);
  --card-radius: var(--radius-md);
  --card-shadow: var(--shadow-card);
  --tag-font: var(--font-accent);
  background-color: var(--cream-bg);
  padding-bottom: 3rem;
}

/* ---- 顶部横幅 ---- */
.page-news .news-hero {
  position: relative;
  overflow: hidden;
  min-height: 320px;
  display: flex;
  align-items: flex-end;
  background-color: var(--deep-blue);
}

.page-news .news-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-news .news-hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-news .news-hero__overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(
    135deg,
    rgba(27, 58, 92, 0.85) 0%,
    rgba(27, 58, 92, 0.45) 60%,
    rgba(232, 77, 57, 0.25) 100%
  );
}

.page-news .news-hero__content {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: var(--news-max-w);
  margin: 0 auto;
  padding: 2rem 1rem 2.5rem;
  color: var(--white-card);
}

.page-news .news-hero__title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 7vw, 3.75rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin: 0.5rem 0 0.25rem;
  text-shadow: 0 2px 12px rgba(0,0,0,0.25);
}

.page-news .news-hero__desc {
  font-family: var(--font-body);
  font-size: 1.125rem;
  line-height: 1.5;
  opacity: 0.9;
  max-width: 32rem;
  margin: 0.25rem 0 0;
}

/* ---- 面包屑 ---- */
.page-news .breadcrumb {
  font-family: var(--font-accent);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 0.375rem;
  color: rgba(255,255,255,0.7);
}

.page-news .breadcrumb__link {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition);
}

.page-news .breadcrumb__link:hover {
  color: var(--white-card);
}

.page-news .breadcrumb__sep {
  opacity: 0.5;
}

.page-news .breadcrumb__current {
  color: var(--white-card);
  font-weight: 600;
}

/* ---- 分类筛选 ---- */
.page-news .news-filter {
  max-width: var(--news-max-w);
  margin: 0 auto;
  padding: 1.5rem 1rem 0.5rem;
}

.page-news .news-filter__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.page-news .news-filter__inner .chip {
  cursor: default;
  transition: background-color var(--transition), color var(--transition);
  border: none;
}

.page-news .news-filter__inner .chip[aria-pressed="true"] {
  background-color: var(--red-orange);
  color: var(--white-card);
}

/* ---- 时间线 ---- */
.page-news .timeline {
  position: relative;
  max-width: var(--news-max-w);
  margin: 0 auto;
  padding: 0.5rem 1rem 2rem;
}

/* 垂直连接线 */
.page-news .timeline::before {
  content: "";
  position: absolute;
  top: 1rem;
  bottom: 1rem;
  left: 1.25rem;
  width: 2px;
  background: var(--timeline-line-color);
  opacity: 0.25;
  border-radius: 1px;
}

.page-news .timeline__item {
  position: relative;
  display: flex;
  gap: 1rem;
  padding-bottom: 2.5rem;
}

.page-news .timeline__item:last-child {
  padding-bottom: 0;
}

/* ---- 时间点 ---- */
.page-news .timeline__point {
  flex: 0 0 var(--timeline-point-w);
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  z-index: 2;
}

.page-news .timeline__dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--timeline-dot-color);
  border: 3px solid var(--cream-bg);
  box-shadow: 0 0 0 2px var(--timeline-dot-color);
  flex-shrink: 0;
  margin-top: 0.25rem;
  transition: transform var(--transition);
}

.page-news .timeline__item:hover .timeline__dot {
  transform: scale(1.25);
}

.page-news .timeline__label {
  font-family: var(--font-accent);
  font-size: 0.625rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--deep-blue);
  margin-top: 0.25rem;
  writing-mode: vertical-lr;
  text-orientation: mixed;
  opacity: 0.7;
  line-height: 1.2;
}

/* ---- 卡片 ---- */
.page-news .timeline__card {
  flex: 1;
  min-width: 0;
  background: var(--white-card);
  border-radius: var(--card-radius);
  box-shadow: var(--card-shadow);
  padding: 1.25rem 1.25rem 1rem;
  transition: box-shadow var(--transition), transform var(--transition);
  border: 1px solid var(--silver-border);
  border-top: 3px solid var(--red-orange);
}

.page-news .timeline__card:hover {
  box-shadow: var(--shadow-float);
  transform: translateY(-2px);
}

.page-news .card__tag {
  display: inline-block;
  font-family: var(--tag-font);
  font-size: 0.6875rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: var(--red-orange);
  color: var(--white-card);
  padding: 0.125rem 0.625rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.page-news .card__title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.25;
  color: var(--deep-brown);
  margin: 0 0 0.375rem;
}

.page-news .card__summary {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  line-height: 1.55;
  color: var(--deep-brown);
  margin: 0 0 0.75rem;
  opacity: 0.85;
}

.page-news .card__media {
  margin: 0 -1.25rem 0.75rem;
  overflow: hidden;
  border-radius: 0;
}

.page-news .card__media img {
  width: 100%;
  height: auto;
  max-height: 200px;
  object-fit: cover;
  display: block;
  transition: transform var(--transition);
}

.page-news .timeline__card:hover .card__media img {
  transform: scale(1.03);
}

/* ---- 卡片展开 ---- */
.page-news .card__details {
  margin-top: 0.25rem;
  border-top: 1px dashed var(--silver-border);
  padding-top: 0.5rem;
}

.page-news .card__summary-btn {
  font-family: var(--font-accent);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--deep-blue);
  cursor: pointer;
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0;
  transition: color var(--transition);
  user-select: none;
}

.page-news .card__summary-btn::-webkit-details-marker {
  display: none;
}

.page-news .card__summary-btn::before {
  content: "+";
  display: inline-block;
  font-family: var(--font-body);
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1;
  color: var(--red-orange);
  transition: transform var(--transition);
}

.page-news .card__details[open] .card__summary-btn::before {
  content: "−";
  transform: rotate(0deg);
}

.page-news .card__summary-btn:hover {
  color: var(--red-orange);
}

.page-news .card__expanded {
  padding: 0.75rem 0 0.25rem;
  animation: newsFadeIn 0.35s ease-out;
}

.page-news .card__expanded p {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--deep-brown);
  margin: 0 0 1rem;
}

@keyframes newsFadeIn {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---- 底部引导 ---- */
.page-news .news-cta {
  max-width: var(--news-max-w);
  margin: 0 auto;
  padding: 1.5rem 1rem 0;
}

.page-news .news-cta__inner {
  background: var(--light-gray-bg);
  border-radius: var(--radius-md);
  padding: 2rem 1.5rem;
  text-align: center;
  border: 1px solid var(--silver-border);
}

.page-news .news-cta__title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--deep-brown);
  margin: 0 0 0.25rem;
}

.page-news .news-cta__desc {
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--deep-brown);
  opacity: 0.7;
  margin: 0 0 1.25rem;
}

.page-news .news-cta__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

.page-news .news-cta__links .btn {
  min-width: 120px;
}

/* =============================================
   桌面端媒体查询 – 视口宽度 >= 768px
   ============================================= */
@media (min-width: 768px) {
  .page-news {
    padding-bottom: 4rem;
  }

  .page-news .news-hero {
    min-height: 400px;
  }

  .page-news .news-hero__content {
    padding: 3rem 2rem 3.5rem;
  }

  .page-news .news-filter {
    padding: 2rem 2rem 0.75rem;
  }

  .page-news .timeline {
    padding: 0.75rem 2rem 3rem;
  }

  /* 时间线左点宽度增大 */
  .page-news {
    --timeline-point-w: 5rem;
  }

  .page-news .timeline::before {
    left: 2.5rem;
  }

  .page-news .timeline__item {
    gap: 2rem;
  }

  .page-news .timeline__dot {
    width: 18px;
    height: 18px;
    border-width: 4px;
    margin-top: 0.5rem;
  }

  .page-news .timeline__label {
    font-size: 0.75rem;
    writing-mode: horizontal-tb;
    margin-top: 0.125rem;
  }

  .page-news .timeline__card {
    padding: 1.5rem 1.5rem 1.25rem;
  }

  .page-news .card__title {
    font-size: 1.5rem;
  }

  .page-news .card__media {
    margin: 0 -1.5rem 1rem;
  }

  .page-news .card__media img {
    max-height: 260px;
  }

  .page-news .news-cta {
    padding: 2rem 2rem 0;
  }

  .page-news .news-cta__inner {
    padding: 3rem 2.5rem;
  }

  .page-news .news-cta__title {
    font-size: 1.75rem;
  }
}

/* =============================================
   桌面端宽屏微调 – 视口宽度 >= 1024px
   ============================================= */
@media (min-width: 1024px) {
  .page-news .news-hero {
    min-height: 460px;
  }

  .page-news .news-hero__content {
    padding: 4rem 2rem 4rem;
  }

  .page-news {
    --timeline-point-w: 6.5rem;
  }

  .page-news .timeline::before {
    left: 3.25rem;
  }

  .page-news .timeline__item {
    gap: 2.5rem;
  }

  .page-news .timeline__card {
    padding: 1.75rem 2rem 1.5rem;
    border-top-width: 4px;
  }

  .page-news .card__media img {
    max-height: 300px;
  }

  .page-news .timeline__dot {
    width: 20px;
    height: 20px;
  }
}