/* ===== page-news 行业观察 ===== */
.page-news {
  --news-accent-alpha: rgba(230,57,70,0.12);
  --news-orange-alpha: rgba(255,107,53,0.18);
  --news-blue-alpha: rgba(29,53,87,0.08);
  --news-timeline-width: 32px;
  --news-card-radius: var(--radius-lg, 12px);
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: var(--content-max, 1200px);
  margin: 0 auto;
  padding: 0 var(--gap, 1.5rem) calc(var(--gap, 1.5rem) * 2);
  font: var(--font-body, 400 1rem/1.6 'Inter','Roboto',sans-serif);
  color: var(--color-neutral-dark, #0B1A2A);
}

/* ===== 面包屑 ===== */
.page-news .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 0 0.25rem;
  font-size: 0.85rem;
  color: var(--color-accent, #1D3557);
  opacity: 0.75;
}
.page-news .breadcrumb a {
  color: var(--color-accent, #1D3557);
  text-decoration: none;
  transition: color var(--transition, 0.3s);
}
.page-news .breadcrumb a:hover,
.page-news .breadcrumb a:focus-visible {
  color: var(--color-primary, #FF6B35);
}
.page-news .breadcrumb span[aria-current="page"] {
  font-weight: 600;
  color: var(--color-primary, #FF6B35);
}

/* ===== Hero ===== */
.page-news__hero {
  position: relative;
  border-radius: var(--news-card-radius);
  overflow: hidden;
  margin: 0.75rem 0 2rem;
  min-height: 280px;
  display: flex;
  align-items: center;
  background: linear-gradient(145deg, var(--color-accent, #1D3557) 0%, #0B1A2A 100%);
}
.page-news__hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.page-news__hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.25;
  display: block;
}
.page-news__hero-overlay {
  position: relative;
  z-index: 1;
  width: 100%;
  padding: 2.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
}
.page-news__hero-shape {
  position: absolute;
  top: -30%;
  right: -10%;
  width: 180px;
  height: 180px;
  background: var(--color-primary, #FF6B35);
  opacity: 0.20;
  border-radius: 50%;
  transform: rotate(25deg);
  pointer-events: none;
}
.page-news__hero-title {
  font: var(--font-heading, 900 italic clamp(2rem,5vw,4rem)/1.1 'Inter','Roboto',sans-serif);
  font-size: clamp(2.4rem, 8vw, 4.2rem);
  color: var(--color-primary, #FF6B35);
  margin: 0;
  letter-spacing: -0.02em;
  line-height: 1;
  text-shadow: 0 2px 20px rgba(255,107,53,0.3);
  position: relative;
}
.page-news__hero-sub {
  font-size: clamp(0.95rem, 2.5vw, 1.25rem);
  font-weight: 500;
  color: var(--color-neutral-light, #F1FAEE);
  margin: 0.25rem 0 0;
  letter-spacing: 0.04em;
  opacity: 0.92;
}

/* ===== 筛选标签 ===== */
.page-news__filters {
  position: relative;
  margin: 0 0 2rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.page-news__filters::-webkit-scrollbar { display: none; }
.page-news__filter-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}
.page-news__filter-labels {
  display: flex;
  gap: 0.5rem;
  position: relative;
  padding: 0.25rem;
  background: var(--news-blue-alpha);
  border-radius: 100px;
  width: fit-content;
  min-width: max-content;
}
.page-news__filter-label {
  padding: 0.55rem 1.25rem;
  border-radius: 100px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-accent, #1D3557);
  cursor: pointer;
  transition: all var(--transition, 0.3s);
  user-select: none;
  white-space: nowrap;
  position: relative;
  z-index: 1;
  border: 1px solid transparent;
}
.page-news__filter-label:hover {
  color: var(--color-primary, #FF6B35);
  border-color: var(--color-primary, #FF6B35);
}
.page-news__filter-indicator {
  display: none;
}
#filter-all:checked ~ .page-news__filter-labels label[for="filter-all"],
#filter-analysis:checked ~ .page-news__filter-labels label[for="filter-analysis"],
#feature-report:checked ~ .page-news__filter-labels label[for="feature-report"],
#data-deep:checked ~ .page-news__filter-labels label[for="data-deep"] {
  background: var(--color-secondary, #E63946);
  color: #fff;
  border-color: var(--color-secondary, #E63946);
  box-shadow: 0 2px 12px rgba(230,57,70,0.30);
}

/* ===== 筛选联动显示文章 ===== */
#filter-analysis:checked ~ .page-news__timeline .page-news__timeline-item[data-category]:not([data-category="analysis"]),
#feature-report:checked ~ .page-news__timeline .page-news__timeline-item[data-category]:not([data-category="report"]),
#data-deep:checked ~ .page-news__timeline .page-news__timeline-item[data-category]:not([data-category="deep"]) {
  display: none;
}

/* ===== 时间轴区域 ===== */
.page-news__timeline {
  margin-bottom: 2.5rem;
}
.page-news__section-title {
  font: var(--font-heading, 900 italic clamp(2rem,5vw,4rem)/1.1 'Inter','Roboto',sans-serif);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  color: var(--color-accent, #1D3557);
  margin: 0 0 1.75rem;
  padding-bottom: 0.75rem;
  border-bottom: 3px solid var(--color-secondary, #E63946);
  display: inline-block;
}
.page-news__timeline-list {
  position: relative;
  padding-left: var(--news-timeline-width);
}
/* 时间轴竖线 */
.page-news__timeline-list::before {
  content: '';
  position: absolute;
  left: calc(var(--news-timeline-width) / 2 - 1px);
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(to bottom, var(--color-primary, #FF6B35), var(--color-secondary, #E63946));
  border-radius: 2px;
  opacity: 0.35;
}
.page-news__timeline-item {
  position: relative;
  margin-bottom: 1.75rem;
  transition: opacity var(--transition, 0.3s), transform var(--transition, 0.3s);
}
.page-news__timeline-item:last-of-type {
  margin-bottom: 0;
}
/* 标记圆点 */
.page-news__timeline-marker {
  position: absolute;
  left: calc(-1 * var(--news-timeline-width) + 4px);
  top: 1.25rem;
  width: 18px;
  height: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
}
.page-news__timeline-dot {
  display: block;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-primary, #FF6B35);
  border: 3px solid var(--color-neutral-light, #F1FAEE);
  box-shadow: 0 0 0 3px var(--color-primary, #FF6B35);
  transition: transform var(--transition, 0.3s);
}
.page-news__timeline-item:hover .page-news__timeline-dot {
  transform: scale(1.3);
}
/* 内容卡片 */
.page-news__timeline-content {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  background: var(--color-glass-bg, rgba(255,255,255,0.7));
  border: 1px solid rgba(168,218,220,0.4);
  border-radius: var(--news-card-radius);
  padding: 1rem 1.25rem;
  backdrop-filter: blur(4px);
  transition: box-shadow var(--transition, 0.3s), transform var(--transition, 0.3s);
}
.page-news__timeline-content:hover {
  box-shadow: var(--shadow-md, 0 4px 20px rgba(13,27,42,0.12));
  transform: translateX(4px);
}
.page-news__timeline-img-wrap {
  flex-shrink: 0;
  border-radius: calc(var(--radius, 8px) - 2px);
  overflow: hidden;
  max-width: 200px;
}
.page-news__timeline-img-wrap--empty {
  display: none;
}
.page-news__timeline-img {
  width: 100%;
  height: auto;
  max-width: 200px;
  display: block;
  border-radius: calc(var(--radius, 8px) - 2px);
  object-fit: cover;
}
.page-news__timeline-text {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.page-news__timeline-title {
  font-size: clamp(1.05rem, 2.5vw, 1.35rem);
  font-weight: 800;
  font-style: italic;
  color: var(--color-accent, #1D3557);
  margin: 0;
  line-height: 1.3;
}
.page-news__timeline-excerpt {
  font-size: 0.92rem;
  color: var(--color-neutral-dark, #0B1A2A);
  opacity: 0.78;
  margin: 0;
  line-height: 1.55;
}
.page-news .category-tag {
  display: inline-block;
  padding: 0.2rem 0.75rem;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: var(--color-secondary, #E63946);
  color: #fff;
  width: fit-content;
  margin-top: 0.25rem;
}

/* ===== 加载更多 ===== */
.page-news__load-more {
  margin-top: 1.25rem;
  border: none;
  display: block;
}
.page-news__load-more-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.6rem;
  border-radius: 100px;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-primary, #FF6B35);
  background: transparent;
  border: 2px solid var(--color-primary, #FF6B35);
  cursor: pointer;
  list-style: none;
  transition: all var(--transition, 0.3s);
  user-select: none;
}
.page-news__load-more-btn::-webkit-details-marker { display: none; }
.page-news__load-more-btn:hover,
.page-news__load-more-btn:focus-visible {
  background: var(--color-primary, #FF6B35);
  color: #fff;
}
.page-news__load-more-icon {
  display: inline-block;
  transition: transform var(--transition, 0.3s);
  font-size: 1.1rem;
  line-height: 1;
}
.page-news__load-more[open] .page-news__load-more-icon {
  transform: rotate(180deg);
}
.page-news__load-more-items {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
  padding-top: 1.75rem;
  animation: page-news-fade-in 0.4s ease;
}
@keyframes page-news-fade-in {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}
.page-news__load-more[open] .page-news__load-more-btn {
  background: var(--color-primary, #FF6B35);
  color: #fff;
}

/* ===== 新用户战报 ===== */
.page-news__new-user {
  margin-bottom: 2.5rem;
}
.page-news__new-user-card {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  background: linear-gradient(135deg, var(--color-accent, #1D3557) 0%, #0F2840 100%);
  border-radius: var(--news-card-radius);
  padding: 2rem 1.5rem;
  align-items: center;
  text-align: center;
  box-shadow: var(--shadow-lg, 0 8px 40px rgba(13,27,42,0.18));
  position: relative;
  overflow: hidden;
}
.page-news__new-user-card::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -20%;
  width: 260px;
  height: 260px;
  background: var(--color-primary, #FF6B35);
  opacity: 0.08;
  border-radius: 50%;
  pointer-events: none;
}
.page-news__new-user-card::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -15%;
  width: 200px;
  height: 200px;
  background: var(--color-secondary, #E63946);
  opacity: 0.06;
  border-radius: 50%;
  pointer-events: none;
}
.page-news__new-user-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: center;
}
.page-news__new-user-title {
  font: var(--font-heading, 900 italic clamp(2rem,5vw,4rem)/1.1 'Inter','Roboto',sans-serif);
  font-size: clamp(1.4rem, 3.5vw, 2rem);
  color: var(--color-primary, #FF6B35);
  margin: 0;
  letter-spacing: -0.01em;
}
.page-news__new-user-desc {
  font-size: 0.98rem;
  color: var(--color-neutral-light, #F1FAEE);
  opacity: 0.88;
  max-width: 520px;
  margin: 0;
  line-height: 1.65;
}
.page-news__new-user-btn {
  margin-top: 0.5rem;
  font-weight: 700;
  padding: 0.7rem 2rem;
}
.page-news__new-user-visual {
  position: relative;
  z-index: 1;
  flex-shrink: 0;
  border-radius: var(--radius, 8px);
  overflow: hidden;
  max-width: 400px;
  width: 100%;
}
.page-news__new-user-img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius, 8px);
  object-fit: cover;
  box-shadow: 0 4px 24px rgba(0,0,0,0.25);
}

/* ===== 内链区域 ===== */
.page-news__internal-links {
  margin-top: 0.5rem;
  border-top: 1px solid var(--color-border, #A8DADC);
  padding-top: 1.5rem;
}
.page-news__internal-links-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}
.page-news__internal-label {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-accent, #1D3557);
  opacity: 0.6;
}
.page-news__internal-items {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}
.page-news__internal-link {
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.45rem 1.25rem;
  border-radius: 100px;
  border: 1.5px solid var(--color-accent, #1D3557);
  color: var(--color-accent, #1D3557);
  background: transparent;
  text-decoration: none;
  transition: all var(--transition, 0.3s);
}
.page-news__internal-link:hover,
.page-news__internal-link:focus-visible {
  background: var(--color-accent, #1D3557);
  color: #fff;
  border-color: var(--color-accent, #1D3557);
}

/* ===== 响应式 ≥640px ===== */
@media (min-width: 640px) {
  .page-news__hero {
    min-height: 340px;
  }
  .page-news__hero-overlay {
    padding: 3rem 2.5rem;
  }
  .page-news__hero-shape {
    width: 280px;
    height: 280px;
    top: -40%;
    right: -5%;
  }
  .page-news__timeline-content {
    flex-direction: row;
    align-items: flex-start;
  }
  .page-news__timeline-img-wrap {
    max-width: 160px;
  }
  .page-news__timeline-img {
    max-width: 160px;
  }
  .page-news__new-user-card {
    flex-direction: row;
    text-align: left;
    padding: 2.5rem 2.5rem;
    gap: 2rem;
  }
  .page-news__new-user-content {
    align-items: flex-start;
    flex: 1;
  }
  .page-news__new-user-visual {
    max-width: 300px;
    flex-shrink: 0;
  }
  .page-news__internal-links-inner {
    flex-direction: row;
    justify-content: space-between;
  }
  .page-news__internal-items {
    justify-content: flex-end;
  }
}

/* ===== 响应式 ≥1024px ===== */
@media (min-width: 1024px) {
  .page-news {
    padding: 0 calc(var(--gap, 1.5rem) * 2) calc(var(--gap, 1.5rem) * 3);
  }
  .page-news__hero {
    min-height: 400px;
    margin: 1rem 0 2.5rem;
  }
  .page-news__hero-overlay {
    padding: 4rem 3.5rem;
  }
  .page-news__hero-shape {
    width: 400px;
    height: 400px;
    top: -50%;
    right: 0;
  }
  .page-news__timeline-list {
    padding-left: 48px;
  }
  .page-news__timeline-list::before {
    left: 22px;
  }
  .page-news__timeline-marker {
    left: calc(-48px + 6px);
    top: 1.5rem;
  }
  .page-news .page-news__timeline-dot {
    width: 16px;
    height: 16px;
  }
  .page-news__timeline-content {
    padding: 1.25rem 1.75rem;
  }
  .page-news__timeline-img-wrap {
    max-width: 200px;
  }
  .page-news__timeline-img {
    max-width: 200px;
  }
  .page-news__new-user-card {
    padding: 3rem 3.5rem;
    gap: 2.5rem;
  }
  .page-news__new-user-visual {
    max-width: 360px;
  }
}

/* ===== 交互：滚动章节高亮占位 ===== */
.page-news .scroll-section.is-visible .page-news__section-title {
  color: var(--color-primary, #FF6B35);
  transition: color 0.5s ease;
}
.page-news .scroll-section.is-visible .page-news__timeline-content {
  border-color: rgba(255,107,53,0.25);
  transition: border-color 0.5s ease;
}