.page-news {
  --news-card-shadow: 0 2px 8px rgba(0,0,0,0.06);
  --news-card-shadow-hover: 0 6px 20px rgba(0,0,0,0.12);
  --news-accent-line: #0066FF;
  --news-filter-bg: #F5F7FA;
  --news-calendar-dot-size: 12px;
  --news-gap: var(--gap-lg, 24px);
  --news-radius: var(--radius-md, 8px);
  display: flex;
  flex-direction: column;
  gap: var(--news-gap);
  padding: var(--gap-md, 16px) var(--gap-sm, 8px) var(--gap-xl, 40px);
  max-width: var(--max-width, 1200px);
  margin: 0 auto;
  width: 100%;
  box-sizing: border-box;
  font-family: var(--font-family, 'Inter', sans-serif);
  color: var(--text-black, #1A1A2E);
}

.page-news .breadcrumb {
  font-size: var(--small, 0.875rem);
  color: var(--text-gray, #4A4A5A);
  margin-bottom: 0;
  display: flex;
  gap: var(--gap-sm, 8px);
  align-items: center;
}

.page-news .breadcrumb a {
  color: var(--primary-blue, #0066FF);
  text-decoration: none;
}

.page-news .breadcrumb a:hover {
  text-decoration: underline;
}

.page-news .breadcrumb .sep {
  color: var(--border-gray, #D0D5DD);
}

.page-news__hero {
  position: relative;
  display: flex;
  align-items: flex-end;
  justify-content: flex-start;
  border-radius: var(--radius-lg, 16px);
  overflow: hidden;
  background: var(--bg-light, #F5F7FA);
  min-height: 120px;
}

.page-news__hero-img {
  width: 100%;
  height: auto;
  max-width: 100%;
  display: block;
  object-fit: cover;
  object-position: center;
}

.page-news__hero-title {
  position: absolute;
  bottom: var(--gap-md, 16px);
  left: var(--gap-lg, 24px);
  font-size: var(--h2, 2.5rem);
  font-weight: var(--weight-bold, 700);
  color: var(--bg-white, #FFFFFF);
  background: rgba(26, 26, 46, 0.65);
  padding: 0.2em 0.6em;
  margin: 0;
  line-height: 1.2;
  letter-spacing: -0.02em;
  border-radius: var(--radius-sm, 4px);
}

.page-news__content {
  display: flex;
  flex-direction: column;
  gap: var(--news-gap);
}

.page-news__filters {
  display: flex;
  gap: var(--gap-sm, 8px);
  flex-wrap: wrap;
  background: var(--news-filter-bg);
  padding: var(--gap-sm, 8px) var(--gap-md, 16px);
  border-radius: var(--radius-md, 8px);
  border: 1px solid var(--border-gray, #D0D5DD);
}

.page-news__filter-btn {
  font-family: inherit;
  font-size: var(--small, 0.875rem);
  font-weight: var(--weight-regular, 400);
  padding: 0.35em 1em;
  border: 1px solid var(--border-gray, #D0D5DD);
  border-radius: 99px;
  background: var(--bg-white, #FFFFFF);
  color: var(--text-gray, #4A4A5A);
  cursor: pointer;
  transition: background var(--transition-fast, 0.2s), color var(--transition-fast, 0.2s), border-color var(--transition-fast, 0.2s);
}

.page-news__filter-btn.is-active,
.page-news__filter-btn[aria-selected="true"] {
  background: var(--primary-blue, #0066FF);
  color: var(--bg-white, #FFFFFF);
  border-color: var(--primary-blue, #0066FF);
}

.page-news__filter-btn:hover:not(.is-active) {
  background: var(--bg-light, #F5F7FA);
  border-color: var(--primary-blue, #0066FF);
}

.page-news__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--news-gap);
}

.page-news__card {
  background: var(--bg-white, #FFFFFF);
  border-radius: var(--news-radius);
  box-shadow: var(--news-card-shadow);
  border-left: 4px solid var(--news-accent-line);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--transition-fast, 0.2s), transform var(--transition-fast, 0.2s);
}

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

.page-news__card--feature {
  border-left-color: var(--accent-orange, #FF6B35);
}

.page-news__card--industry {
  border-left-color: var(--primary-blue-dark, #004CBF);
}

.page-news__card--calendar {
  border-left-color: var(--border-gray, #D0D5DD);
  background: var(--bg-light, #F5F7FA);
  align-items: center;
  text-align: center;
  padding: var(--gap-lg, 24px) var(--gap-md, 16px);
}

.page-news__card-img {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  border-radius: var(--news-radius) var(--news-radius) 0 0;
}

.page-news__card-body {
  padding: var(--gap-md, 16px);
  display: flex;
  flex-direction: column;
  gap: var(--gap-sm, 8px);
}

.page-news__card-heading {
  font-size: var(--h3, 1.75rem);
  font-weight: var(--weight-bold, 700);
  margin: 0;
  line-height: 1.3;
  color: var(--text-black, #1A1A2E);
}

.page-news__card-summary p {
  margin: 0 0 0.5em;
  font-size: var(--body, 1rem);
  line-height: 1.6;
  color: var(--text-gray, #4A4A5A);
}

.page-news__card-summary p:last-child {
  margin-bottom: 0;
}

.page-news__card-extra {
  font-size: var(--small, 0.875rem);
  color: var(--text-gray, #4A4A5A);
  margin-top: var(--gap-sm, 8px);
  padding-top: var(--gap-sm, 8px);
  border-top: 1px dashed var(--border-gray, #D0D5DD);
}

.page-news__card-toggle {
  align-self: flex-start;
  font-family: inherit;
  font-size: var(--small, 0.875rem);
  font-weight: var(--weight-bold, 700);
  color: var(--primary-blue, #0066FF);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.2em 0;
  transition: color var(--transition-fast, 0.2s);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.page-news__card-toggle:hover {
  color: var(--accent-orange, #FF6B35);
}

.page-news__calendar-placeholder {
  display: flex;
  gap: var(--gap-md, 16px);
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  padding: var(--gap-lg, 24px) 0;
  border: 2px dashed var(--border-gray, #D0D5DD);
  border-radius: var(--radius-md, 8px);
  width: 100%;
  max-width: 360px;
  margin: 0 auto;
}

.page-news__calendar-dot {
  display: inline-block;
  width: var(--news-calendar-dot-size);
  height: var(--news-calendar-dot-size);
  border-radius: 50%;
  background: var(--primary-blue, #0066FF);
  opacity: 0.5;
  animation: dot-pulse 2s ease-in-out infinite;
}

.page-news__calendar-dot:nth-child(2) {
  animation-delay: 0.4s;
  background: var(--accent-orange, #FF6B35);
}

.page-news__calendar-dot:nth-child(3) {
  animation-delay: 0.8s;
  background: var(--primary-blue-dark, #004CBF);
}

.page-news__calendar-dot:nth-child(4) {
  animation-delay: 1.2s;
  background: var(--accent-orange-light, #FF8C5A);
}

@keyframes dot-pulse {
  0%, 100% { opacity: 0.4; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.4); }
}

.page-news__calendar-placeholder p {
  font-size: var(--small, 0.875rem);
  color: var(--text-gray, #4A4A5A);
  margin: 0;
  width: 100%;
  text-align: center;
}

.page-news__card-link {
  display: inline-block;
  font-size: var(--body, 1rem);
  font-weight: var(--weight-bold, 700);
  color: var(--primary-blue, #0066FF);
  text-decoration: none;
  margin-top: var(--gap-sm, 8px);
  transition: color var(--transition-fast, 0.2s);
}

.page-news__card-link:hover {
  color: var(--accent-orange, #FF6B35);
  text-decoration: underline;
}

.page-news__related {
  background: var(--bg-light, #F5F7FA);
  padding: var(--gap-lg, 24px) var(--gap-md, 16px);
  border-radius: var(--radius-md, 8px);
  border: 1px solid var(--border-gray, #D0D5DD);
}

.page-news__related-title {
  font-size: var(--h3, 1.75rem);
  font-weight: var(--weight-bold, 700);
  margin: 0 0 var(--gap-md, 16px);
  color: var(--text-black, #1A1A2E);
}

.page-news__related-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--gap-sm, 8px);
}

.page-news__related-list li a {
  font-size: var(--body, 1rem);
  color: var(--primary-blue, #0066FF);
  text-decoration: none;
  padding: 0.3em 0;
  display: inline-block;
  transition: color var(--transition-fast, 0.2s);
}

.page-news__related-list li a:hover {
  color: var(--accent-orange, #FF6B35);
  text-decoration: underline;
}

/* 桌面端 */
@media (min-width: 768px) {
  .page-news {
    padding: var(--gap-lg, 24px) var(--gap-xl, 40px) var(--gap-xl, 40px);
  }

  .page-news__hero {
    min-height: 200px;
  }

  .page-news__hero-title {
    font-size: var(--h1, 3.5rem);
    bottom: var(--gap-lg, 24px);
    left: var(--gap-xl, 40px);
  }

  .page-news__content {
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--gap-xl, 40px);
  }

  .page-news__filters {
    width: 100%;
    order: 0;
  }

  .page-news__grid {
    flex: 1 1 0;
    min-width: 0;
    grid-template-columns: repeat(2, 1fr);
    order: 1;
  }

  .page-news__card--feature {
    grid-column: 1 / -1;
    flex-direction: row;
    align-items: stretch;
  }

  .page-news__card--feature .page-news__card-img {
    width: 300px;
    height: auto;
    border-radius: var(--news-radius) 0 0 var(--news-radius);
    flex-shrink: 0;
  }

  .page-news__card--feature .page-news__card-body {
    flex: 1;
  }

  .page-news__card--calendar {
    grid-column: span 2;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    text-align: left;
    padding: var(--gap-lg, 24px) var(--gap-xl, 40px);
  }

  .page-news__calendar-placeholder {
    width: auto;
    max-width: none;
    margin: 0;
    padding: var(--gap-md, 16px) var(--gap-lg, 24px);
  }

  .page-news__related {
    width: 280px;
    flex-shrink: 0;
    order: 2;
    align-self: flex-start;
    position: sticky;
    top: calc(var(--header-top-h, 60px) + var(--nav-h, 48px) + var(--gap-md, 16px));
  }
}

@media (min-width: 1024px) {
  .page-news__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-news__card--feature {
    grid-column: span 2;
  }
}