/* ===== 品牌日志页面专属样式 ===== */
.page-news {
  --news-line-color: var(--betbo-primary);
  --news-dot-size: 18px;
  --news-track-width: 60px;
  --news-number-size: 3.6rem;
  --news-card-radius: 10px;
  --news-card-shadow: 0 6px 24px rgba(29, 53, 87, 0.10);
  --news-card-hover-shadow: 0 12px 40px rgba(29, 53, 87, 0.18);
  --news-transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --news-tag-bg: var(--betbo-accent);
  --news-tag-color: var(--betbo-secondary);
  --news-line-gradient: linear-gradient(180deg, var(--betbo-primary) 0%, var(--betbo-accent) 60%, var(--betbo-highlight) 100%);
}

/* ---------- hero 首屏 ---------- */
.page-news__hero {
  padding: 40px 0 32px;
  background: var(--betbo-background);
  border-bottom: 2px solid rgba(230, 57, 70, 0.15);
  position: relative;
}
.page-news__hero::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--news-line-gradient);
  opacity: 0.5;
}
.page-news__hero-title {
  font-family: var(--betbo-font-heading);
  font-weight: var(--betbo-font-weight-bold);
  font-size: clamp(2.2rem, 6vw, 3.6rem);
  letter-spacing: var(--betbo-tracking-wide);
  line-height: 1.1;
  color: var(--betbo-secondary);
  margin: 16px 0 8px;
}
.page-news__hero-desc {
  font-family: var(--betbo-font-body);
  font-weight: var(--betbo-font-weight-light);
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--betbo-text);
  max-width: 720px;
  margin-bottom: 24px;
  opacity: 0.85;
}

/* ---------- 筛选 radio ---------- */
.page-news__filter-radio {
  position: absolute;
  opacity: 0;
  pointer-events: none;
  width: 0;
  height: 0;
}
.page-news__filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.page-news__filter-label {
  display: inline-block;
  font-family: var(--betbo-font-heading);
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.03em;
  padding: 8px 20px;
  border-radius: 30px;
  cursor: pointer;
  transition: background var(--betbo-transition), color var(--betbo-transition), box-shadow var(--betbo-transition);
  background: var(--betbo-surface);
  color: var(--betbo-secondary);
  border: 1.5px solid rgba(29, 53, 87, 0.18);
  user-select: none;
}
.page-news__filter-label:hover {
  border-color: var(--betbo-primary);
  color: var(--betbo-primary);
}

#filter-all:checked ~ .page-news__hero .page-news__filter-label--all,
#filter-highlights:checked ~ .page-news__hero .page-news__filter-label--highlights,
#filter-guides:checked ~ .page-news__hero .page-news__filter-label--guides,
#filter-insights:checked ~ .page-news__hero .page-news__filter-label--insights {
  background: var(--betbo-primary);
  color: #fff;
  border-color: var(--betbo-primary);
  box-shadow: 0 4px 12px rgba(230, 57, 70, 0.30);
}
/* 焦点样式 */
.page-news__filter-radio:focus-visible + .page-news__hero .page-news__filter-label {
  outline: 3px solid var(--betbo-highlight);
  outline-offset: 2px;
}

/* ---------- 时间线容器 ---------- */
.page-news__timeline {
  position: relative;
  max-width: var(--betbo-container-max);
  margin: 0 auto;
  padding: 24px var(--betbo-gap) 60px;
}

/* ---------- 章节 ---------- */
.page-news__chapter {
  display: flex;
  gap: 0;
  position: relative;
  scroll-margin-top: 80px;
}
.page-news__chapter + .page-news__chapter {
  margin-top: 20px;
}

/* 筛选隐藏 */
#filter-highlights:checked ~ .page-news__timeline .page-news__chapter:not([data-category="highlights"]),
#filter-guides:checked ~ .page-news__timeline .page-news__chapter:not([data-category="guides"]),
#filter-insights:checked ~ .page-news__timeline .page-news__chapter:not([data-category="insights"]) {
  display: none;
}

/* ---------- 时间线轨道 ---------- */
.page-news__chapter-track {
  width: var(--news-track-width);
  flex-shrink: 0;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.page-news__chapter-line {
  width: 3px;
  flex-grow: 1;
  background: var(--news-line-gradient);
  border-radius: 2px;
  min-height: 60px;
}
.page-news__chapter:first-child .page-news__chapter-line {
  border-radius: 2px 2px 0 0;
}
.page-news__chapter:last-child .page-news__chapter-line {
  border-radius: 0 0 2px 2px;
}
.page-news__chapter-dot {
  width: var(--news-dot-size);
  height: var(--news-dot-size);
  border-radius: 50%;
  background: var(--betbo-primary);
  border: 4px solid var(--betbo-background);
  box-shadow: 0 0 0 2px var(--betbo-primary);
  flex-shrink: 0;
  margin: 8px 0;
  z-index: 2;
  position: relative;
}
/* 每个章节dot位置不同颜色渐变 */
.page-news__chapter[data-category="highlights"] .page-news__chapter-dot {
  background: var(--betbo-primary);
  box-shadow: 0 0 0 2px var(--betbo-primary);
}
.page-news__chapter[data-category="guides"] .page-news__chapter-dot {
  background: var(--betbo-accent);
  box-shadow: 0 0 0 2px var(--betbo-accent);
}
.page-news__chapter[data-category="insights"] .page-news__chapter-dot {
  background: var(--betbo-highlight);
  box-shadow: 0 0 0 2px var(--betbo-highlight);
}

/* ---------- 章节内容 ---------- */
.page-news__chapter-content {
  flex: 1;
  padding-left: 20px;
  padding-bottom: 40px;
  min-width: 0;
}
.page-news__chapter:last-child .page-news__chapter-content {
  padding-bottom: 0;
}
.page-news__chapter-header {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 24px;
}
.page-news__chapter-number {
  font-family: var(--betbo-font-heading);
  font-weight: var(--betbo-font-weight-bold);
  font-size: var(--news-number-size);
  line-height: 1;
  color: var(--betbo-primary);
  opacity: 0.35;
  letter-spacing: -0.02em;
  flex-shrink: 0;
}
.page-news__chapter-heading {
  font-family: var(--betbo-font-heading);
  font-weight: var(--betbo-font-weight-bold);
  font-size: 1.6rem;
  letter-spacing: var(--betbo-tracking-wide);
  color: var(--betbo-secondary);
  margin: 0;
  line-height: 1.2;
}

/* ---------- 卡片网格 ---------- */
.page-news__cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

/* ---------- 单张卡片 ---------- */
.page-news__card {
  background: var(--betbo-surface);
  border-radius: var(--news-card-radius);
  box-shadow: var(--news-card-shadow);
  overflow: hidden;
  transition: transform var(--news-transition), box-shadow var(--news-transition);
  display: flex;
  flex-direction: column;
}
.page-news__card:hover {
  transform: translateY(-4px);
  box-shadow: var(--news-card-hover-shadow);
}

/* 图片 */
.page-news__card-img-wrap {
  width: 100%;
  overflow: hidden;
  background: var(--betbo-background);
  aspect-ratio: 800 / 400;
}
.page-news__card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}
.page-news__card:hover .page-news__card-img {
  transform: scale(1.03);
}

/* 卡片正文 */
.page-news__card-body {
  padding: 20px 22px 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.page-news__card-tag {
  display: inline-block;
  font-family: var(--betbo-font-heading);
  font-weight: 600;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 12px;
  border-radius: 20px;
  background: var(--news-tag-bg);
  color: var(--news-tag-color);
  margin-bottom: 10px;
  align-self: flex-start;
}
.page-news__card-tag--latest { background: var(--betbo-primary); color: #fff; }
.page-news__card-tag--featured { background: var(--betbo-accent); color: var(--betbo-secondary); }
.page-news__card-tag--guide { background: var(--betbo-highlight); color: #fff; }
.page-news__card-tag--tip { background: #e0e7ef; color: var(--betbo-secondary); }
.page-news__card-tag--insight { background: var(--betbo-secondary); color: #fff; }
.page-news__card-tag--trend { background: #2a9d8f; color: #fff; }

.page-news__card-title {
  font-family: var(--betbo-font-heading);
  font-weight: 600;
  font-size: 1.2rem;
  line-height: 1.3;
  color: var(--betbo-secondary);
  margin: 0 0 8px;
}
.page-news__card-summary {
  font-family: var(--betbo-font-body);
  font-weight: var(--betbo-font-weight-light);
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--betbo-text);
  opacity: 0.8;
  margin: 0 0 16px;
  flex: 1;
}

/* ---------- 展开/收起交互 ---------- */
.page-news__card-toggle-input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
  width: 0;
  height: 0;
}
.page-news__card-toggle-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--betbo-font-heading);
  font-weight: 600;
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  color: var(--betbo-primary);
  cursor: pointer;
  transition: color var(--betbo-transition);
  user-select: none;
  margin-top: 4px;
  align-self: flex-start;
  padding: 4px 0;
  border-bottom: 1.5px solid transparent;
}
.page-news__card-toggle-label:hover {
  color: #c1121f;
  border-bottom-color: currentColor;
}
.page-news__card-toggle-label::before {
  content: '→';
  display: inline-block;
  transition: transform var(--betbo-transition);
  font-weight: 700;
}
.page-news__card-toggle-input:checked ~ .page-news__card-toggle-label::before {
  transform: rotate(90deg);
}

.page-news__card-toggle-more,
.page-news__card-toggle-less {
  transition: opacity 0.2s;
}
.page-news__card-toggle-less {
  display: none;
}
.page-news__card-toggle-input:checked ~ .page-news__card-toggle-label .page-news__card-toggle-more {
  display: none;
}
.page-news__card-toggle-input:checked ~ .page-news__card-toggle-label .page-news__card-toggle-less {
  display: inline;
}

/* 详细内容区域 */
.page-news__card-detail {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.45s ease, padding 0.3s ease, opacity 0.3s ease;
  opacity: 0;
  padding: 0 2px;
}
.page-news__card-toggle-input:checked ~ .page-news__card-detail {
  max-height: 400px;
  opacity: 1;
  padding: 16px 2px 4px;
}
.page-news__card-detail p {
  font-family: var(--betbo-font-body);
  font-weight: var(--betbo-font-weight-light);
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--betbo-text);
  margin: 0;
  border-top: 1px solid rgba(29, 53, 87, 0.08);
  padding-top: 14px;
}

/* ---------- 键盘焦点 ---------- */
.page-news__card-toggle-input:focus-visible + .page-news__card-toggle-label {
  outline: 3px solid var(--betbo-highlight);
  outline-offset: 4px;
  border-radius: 4px;
}

/* ---------- 响应式 ---------- */
/* 移动端 (< 768px) */
@media (max-width: 767px) {
  .page-news__hero {
    padding: 24px 0 28px;
  }
  .page-news__hero-title {
    font-size: 1.9rem;
  }
  .page-news__hero-desc {
    font-size: 0.95rem;
  }
  .page-news__filters {
    gap: 8px;
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 4px;
    -webkit-overflow-scrolling: touch;
  }
  .page-news__filter-label {
    font-size: 0.78rem;
    padding: 6px 16px;
    white-space: nowrap;
  }
  .page-news__timeline {
    padding: 16px 16px 40px;
  }
  .page-news__chapter-track {
    width: 40px;
  }
  .page-news__chapter-dot {
    width: 14px;
    height: 14px;
    border-width: 3px;
    margin: 6px 0;
  }
  .page-news__chapter-content {
    padding-left: 14px;
    padding-bottom: 32px;
  }
  .page-news__chapter-number {
    font-size: 2.6rem;
  }
  .page-news__chapter-heading {
    font-size: 1.3rem;
  }
  .page-news__card-body {
    padding: 16px 16px 20px;
  }
  .page-news__card-title {
    font-size: 1.05rem;
  }
  .page-news__card-summary {
    font-size: 0.88rem;
  }
  .page-news__card-detail p {
    font-size: 0.85rem;
  }
}

/* 桌面端 (>= 768px) */
@media (min-width: 768px) {
  .page-news__chapter-track {
    width: 72px;
  }
  .page-news__chapter-content {
    padding-left: 32px;
  }
  .page-news__chapter-header {
    margin-bottom: 28px;
  }
  .page-news__chapter-number {
    font-size: 4.2rem;
  }
  .page-news__chapter-heading {
    font-size: 1.8rem;
  }
  .page-news__cards {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
  }
  .page-news__card-body {
    padding: 22px 26px 28px;
  }
  .page-news__hero {
    padding: 48px 0 36px;
  }
  .page-news__filter-label {
    font-size: 0.9rem;
    padding: 10px 24px;
  }
  .page-news__timeline {
    padding: 32px var(--betbo-gap) 80px;
  }
}

/* 大桌面端 (>= 1024px) */
@media (min-width: 1024px) {
  .page-news__chapter-track {
    width: 80px;
  }
  .page-news__chapter-content {
    padding-left: 44px;
  }
  .page-news__chapter-number {
    font-size: 5rem;
  }
  .page-news__chapter-heading {
    font-size: 2rem;
  }
  .page-news__cards {
    gap: 32px;
  }
  .page-news__card-body {
    padding: 26px 30px 32px;
  }
}

/* 减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  .page-news__card,
  .page-news__card-img,
  .page-news__card-detail,
  .page-news__card-toggle-label::before,
  .page-news__filter-label {
    transition: none !important;
    transform: none !important;
  }
  .page-news__card:hover {
    transform: none;
    box-shadow: var(--news-card-shadow);
  }
  .page-news__card:hover .page-news__card-img {
    transform: none;
  }
  .page-news__card-detail {
    transition: none;
  }
  .page-news__card-toggle-input:checked ~ .page-news__card-detail {
    max-height: 600px;
  }
}