/* ========== page-news 内容专栏专属样式 ========== */
.page-news {
  --news-bg: #0B0C10;
  --news-accent: #E63946;
  --news-blue: #1D3557;
  --news-teal: #457B9D;
  --news-yellow: #F4A261;
  --news-green: #2A9D8F;
  --news-gray: #A8B2C1;
  --news-white: #F1FAEE;
  --news-card-gap: 1.5rem;
  --news-radius: 0px;
  display: block;
  background: var(--news-bg);
  color: var(--news-white);
}

/* 横幅区 */
.page-news__banner {
  position: relative;
  padding: 4rem 0 3rem;
  background: linear-gradient(135deg, #1D3557 0%, #0B0C10 60%, #E63946 100%);
  border-bottom: 2px solid rgba(230,57,70,0.3);
  overflow: hidden;
}
.page-news__banner::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: repeating-linear-gradient(45deg, transparent, transparent 20px, rgba(230,57,70,0.03) 20px, rgba(230,57,70,0.03) 21px);
  pointer-events: none;
}
.page-news__banner-inner {
  text-align: center;
  position: relative;
  z-index: 1;
}
.page-news__banner-title {
  font-family: var(--font-heading);
  font-weight: 800;
  font-style: italic;
  font-size: 2.2rem;
  line-height: 1.1;
  color: var(--news-white);
  margin: 0 0 0.5rem;
  letter-spacing: -0.02em;
  text-shadow: 0 0 30px rgba(230,57,70,0.5);
}
.page-news__banner-desc {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 1rem;
  color: var(--news-gray);
  letter-spacing: 0.08em;
  margin: 0;
}

/* 分类筛选 */
.page-news__filter {
  padding: 1.25rem 0;
  background: #0B0C10;
  border-bottom: 1px solid rgba(69,123,157,0.2);
  position: sticky;
  top: 64px;
  z-index: 5;
}
.page-news__filter-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}
.page-news__filter-btn {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--news-gray);
  background: transparent;
  border: 1px solid var(--news-teal);
  padding: 0.5rem 1.25rem;
  cursor: pointer;
  letter-spacing: 0.04em;
  transition: all 0.2s ease;
  outline: none;
  border-radius: 2px;
}
.page-news__filter-btn:hover {
  color: var(--news-white);
  border-color: var(--news-accent);
  background: rgba(230,57,70,0.12);
}
.page-news__filter-btn.is-active {
  color: var(--news-white);
  background: var(--news-accent);
  border-color: var(--news-accent);
}

/* 分类章节 */
.page-news__section {
  padding: 3rem 0 2rem;
  border-bottom: 1px solid rgba(69,123,157,0.12);
}
.page-news__section:last-of-type {
  border-bottom: none;
}
.page-news__section-heading {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-heading);
  font-weight: 800;
  font-style: italic;
  font-size: 1.6rem;
  color: var(--news-white);
  margin: 0 0 2rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--news-accent);
}
.page-news__section-icon {
  width: 80px;
  height: 80px;
  object-fit: cover;
  border-radius: 2px;
  flex-shrink: 0;
  background: rgba(230,57,70,0.1);
  border: 1px solid rgba(230,57,70,0.2);
  display: block;
  max-width: 100%;
  height: auto;
}

/* 文章网格 */
.page-news__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--news-card-gap);
}

/* 单篇文章卡片 */
.page-news__card {
  background: #111316;
  border: 1px solid rgba(69,123,157,0.15);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  border-radius: 2px;
}
.page-news__card:hover {
  border-color: rgba(230,57,70,0.4);
  box-shadow: 0 4px 20px rgba(230,57,70,0.08);
}
.page-news__card-img {
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  display: block;
  border-bottom: 1px solid rgba(69,123,157,0.1);
}
.page-news__card-body {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.page-news__card-tag {
  font-family: var(--font-data);
  font-weight: 500;
  font-size: 0.75rem;
  color: var(--news-accent);
  letter-spacing: 0.06em;
  margin-bottom: 0.5rem;
  display: inline-block;
  text-transform: uppercase;
}
.page-news__card-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-style: italic;
  font-size: 1.15rem;
  line-height: 1.2;
  color: var(--news-white);
  margin: 0 0 0.5rem;
}
.page-news__card-summary {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 0.9rem;
  line-height: 1.55;
  color: var(--news-gray);
  margin: 0 0 0.75rem;
}
.page-news__card-expand {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0;
  color: var(--news-gray);
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 0.9rem;
  line-height: 1.6;
}
.page-news__card-expand p {
  margin: 0 0 0.75rem;
}
.page-news__card[data-open] .page-news__card-expand {
  max-height: 600px;
  padding-top: 0.75rem;
}
.page-news__card-toggle {
  font-family: var(--font-data);
  font-weight: 500;
  font-size: 0.8rem;
  color: var(--news-teal);
  background: transparent;
  border: none;
  padding: 0;
  cursor: pointer;
  text-align: left;
  letter-spacing: 0.03em;
  transition: color 0.2s ease;
  margin-top: auto;
  outline: none;
}
.page-news__card-toggle:hover {
  color: var(--news-accent);
}
.page-news__card-link {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--news-accent);
  text-decoration: none;
  display: inline-block;
  margin-top: 0.5rem;
  transition: opacity 0.2s ease;
}
.page-news__card-link:hover {
  opacity: 0.75;
  text-decoration: underline;
}

/* 信任声明 */
.page-news__trust {
  padding: 2rem 0 3rem;
  text-align: center;
  border-top: 1px solid rgba(69,123,157,0.1);
}

/* 移动端优先——以上为基础样式 */
/* 桌面端 >= 768px */
@media (min-width: 768px) {
  .page-news__banner-title {
    font-size: 2.8rem;
  }
  .page-news__grid {
    grid-template-columns: 1fr 1fr;
  }
  .page-news__card:first-child {
    grid-column: 1 / -1;
    flex-direction: row;
  }
  .page-news__card:first-child .page-news__card-img {
    width: 50%;
    aspect-ratio: auto;
    min-height: 280px;
    border-bottom: none;
    border-right: 1px solid rgba(69,123,157,0.1);
  }
  .page-news__card:first-child .page-news__card-body {
    width: 50%;
    padding: 1.5rem;
  }
  .page-news__card:first-child .page-news__card-title {
    font-size: 1.4rem;
  }
  .page-news__section-heading {
    font-size: 1.9rem;
  }
}

@media (min-width: 1024px) {
  .page-news__banner-title {
    font-size: 3.2rem;
  }
  .page-news__grid {
    grid-template-columns: 1fr 1fr 1fr;
  }
  .page-news__card:first-child {
    grid-column: 1 / 3;
    grid-row: 1 / 2;
    flex-direction: row;
  }
  .page-news__card:first-child .page-news__card-img {
    width: 55%;
    min-height: 300px;
  }
  .page-news__card:first-child .page-news__card-body {
    width: 45%;
    padding: 1.75rem;
  }
  .page-news__card:nth-child(2) {
    grid-column: 3 / 4;
    grid-row: 1 / 2;
  }
  .page-news__card:nth-child(3) {
    grid-column: 1 / 2;
    grid-row: 2 / 3;
  }
  .page-news__card:nth-child(4) {
    grid-column: 2 / 4;
    grid-row: 2 / 3;
    flex-direction: row;
  }
  .page-news__card:nth-child(4) .page-news__card-img {
    width: 45%;
    min-height: 240px;
    border-bottom: none;
    border-right: 1px solid rgba(69,123,157,0.1);
  }
  .page-news__card:nth-child(4) .page-news__card-body {
    width: 55%;
    padding: 1.5rem;
  }
  .page-news__section:nth-child(even) .page-news__grid {
    grid-template-columns: 1fr 1fr 1fr;
  }
  .page-news__section:nth-child(even) .page-news__card:first-child {
    grid-column: 1 / 3;
    grid-row: 1 / 2;
  }
  .page-news__section:nth-child(even) .page-news__card:nth-child(2) {
    grid-column: 3 / 4;
    grid-row: 1 / 2;
  }
  .page-news__section:nth-child(even) .page-news__card:nth-child(3) {
    grid-column: 1 / 2;
    grid-row: 2 / 3;
  }
  .page-news__section:nth-child(even) .page-news__card:nth-child(4) {
    grid-column: 2 / 4;
    grid-row: 2 / 3;
  }
}

@media (min-width: 1280px) {
  .page-news__banner-title {
    font-size: 3.6rem;
  }
  .page-news__section {
    padding: 4rem 0 3rem;
  }
}