.page-news {
  --news-bg-card: #1a1a1a;
  --news-bg-card-hover: #242424;
  --news-bg-faq: linear-gradient(135deg, rgba(229,57,53,0.18) 0%, rgba(30,136,229,0.08) 100%);
  --news-bg-changelog: linear-gradient(135deg, rgba(30,136,229,0.10) 0%, rgba(229,57,53,0.06) 100%);
  --news-category-gap: 2.5rem;
  --news-card-radius: 16px;
  --news-filter-height: 2.75rem;
  --news-icon-size: 3rem;
  display: block;
  width: 100%;
  max-width: var(--max-width, 1200px);
  margin: 0 auto;
  padding: 1.25rem 1rem 3rem;
  color: var(--c-text, #E0E0E0);
  font-family: var(--font-body, 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif);
  line-height: 1.6;
}

/* ===== 面包屑 ===== */
.page-news .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: var(--c-silver, #B0BEC5);
  margin-bottom: 1.5rem;
  letter-spacing: 0.02em;
}
.page-news .breadcrumb a {
  color: var(--c-silver, #B0BEC5);
  text-decoration: none;
  transition: color 0.2s;
}
.page-news .breadcrumb a:hover,
.page-news .breadcrumb a:focus-visible {
  color: var(--c-blue, #1E88E5);
}
.page-news .breadcrumb-sep {
  font-weight: 700;
  color: var(--c-silver, #B0BEC5);
  opacity: 0.5;
}
.page-news .breadcrumb [aria-current="page"] {
  color: var(--c-text, #E0E0E0);
  font-weight: 600;
}

/* ===== 封面标题区 ===== */
.page-news .news-cover {
  margin-bottom: 2.75rem;
}
.page-news .news-cover-title {
  font-family: var(--font-head, 'Roboto Condensed', 'Impact', sans-serif);
  font-size: clamp(2.2rem, 7vw, 4rem);
  font-weight: 900;
  line-height: 1.1;
  color: #fff;
  margin: 0 0 0.6rem;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  position: relative;
  display: inline-block;
}
.page-news .news-cover-title::after {
  content: '';
  display: block;
  width: 3.5rem;
  height: 4px;
  background: var(--c-red, #E53935);
  margin-top: 0.5rem;
  border-radius: 4px;
}
.page-news .news-cover-desc {
  font-size: 1rem;
  color: var(--c-silver, #B0BEC5);
  max-width: 40rem;
  margin: 0.75rem 0 1.5rem;
  line-height: 1.7;
}

/* ===== 筛选栏 ===== */
.page-news .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  min-height: var(--news-filter-height);
}
.page-news .filter-btn {
  font-family: var(--font-body, 'Noto Sans SC', sans-serif);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.4rem 1.2rem;
  border: none;
  border-radius: 999px;
  background: rgba(255,255,255,0.06);
  color: var(--c-silver, #B0BEC5);
  cursor: pointer;
  transition: background 0.25s, color 0.25s, transform 0.15s;
  white-space: nowrap;
  letter-spacing: 0.02em;
}
.page-news .filter-btn:hover {
  background: rgba(255,255,255,0.12);
  color: #fff;
}
.page-news .filter-btn:focus-visible {
  outline: 2px solid var(--c-blue, #1E88E5);
  outline-offset: 2px;
}
.page-news .filter-btn.is-active {
  background: var(--c-red, #E53935);
  color: #fff;
}

/* ===== 分区标题 ===== */
.page-news .section-title {
  font-family: var(--font-head, 'Roboto Condensed', sans-serif);
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  font-weight: 800;
  color: #fff;
  margin: 0 0 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  letter-spacing: -0.01em;
}
.page-news .section-title-marker {
  display: inline-block;
  width: 6px;
  height: 1.5em;
  background: var(--c-red, #E53935);
  border-radius: 4px;
  flex-shrink: 0;
}

/* ===== 分类区块 ===== */
.page-news .category-block {
  margin-bottom: var(--news-category-gap);
  padding: 1.5rem 1.25rem;
  background: rgba(255,255,255,0.02);
  border-radius: var(--radius-lg, 16px);
  transition: background 0.3s;
}
.page-news .category-block:hover {
  background: rgba(255,255,255,0.04);
}
.page-news .category-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}
.page-news .category-name {
  font-family: var(--font-head, 'Roboto Condensed', sans-serif);
  font-size: 1.35rem;
  font-weight: 700;
  color: #fff;
  margin: 0;
  letter-spacing: 0.01em;
  position: relative;
  padding-left: 1rem;
  border-left: 4px solid var(--c-blue, #1E88E5);
}
.page-news .category-img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm, 8px);
  object-fit: cover;
  flex-shrink: 0;
  width: 280px;
  max-height: 140px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.3);
  transition: transform 0.3s, box-shadow 0.3s;
}
.page-news .category-img:hover {
  transform: scale(1.02);
  box-shadow: 0 4px 24px rgba(0,0,0,0.45);
}

/* ===== 卡片堆叠 ===== */
.page-news .card-stack {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* ===== 单篇文章卡片 ===== */
.page-news .article-card {
  display: flex;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--news-bg-card);
  border-radius: var(--news-card-radius);
  transition: background 0.3s, transform 0.2s;
  align-items: flex-start;
}
.page-news .article-card:hover {
  background: var(--news-bg-card-hover);
  transform: translateX(4px);
}
.page-news .article-card:focus-within {
  outline: 2px solid var(--c-blue, #1E88E5);
  outline-offset: 2px;
}
.page-news .card-icon {
  width: var(--news-icon-size);
  height: var(--news-icon-size);
  border-radius: var(--radius-sm, 8px);
  object-fit: cover;
  flex-shrink: 0;
  margin-top: 0.15rem;
  background: rgba(255,255,255,0.04);
}
.page-news .card-body {
  flex: 1;
  min-width: 0;
}
.page-news .card-title {
  font-family: var(--font-head, 'Roboto Condensed', sans-serif);
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  margin: 0 0 0.3rem;
  line-height: 1.3;
}
.page-news .card-summary {
  font-size: 0.9375rem;
  color: var(--c-silver, #B0BEC5);
  margin: 0 0 0.5rem;
  line-height: 1.6;
}
.page-news .card-detail {
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition: max-height 0.4s ease, opacity 0.3s ease, margin 0.3s ease;
  margin: 0;
}
.page-news .card-detail[data-open] {
  max-height: 240px;
  opacity: 1;
  margin: 0.5rem 0 0.25rem;
}
.page-news .card-detail p {
  font-size: 0.9rem;
  color: var(--c-silver, #B0BEC5);
  line-height: 1.7;
  margin: 0;
  padding: 0.75rem 1rem;
  background: rgba(0,0,0,0.2);
  border-radius: var(--radius-sm, 8px);
  border-left: 3px solid var(--c-blue, #1E88E5);
}
.page-news .expand-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-body, 'Noto Sans SC', sans-serif);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--c-blue, #1E88E5);
  background: transparent;
  border: none;
  padding: 0.25rem 0;
  cursor: pointer;
  transition: color 0.2s, gap 0.2s;
  letter-spacing: 0.02em;
}
.page-news .expand-btn:hover,
.page-news .expand-btn:focus-visible {
  color: var(--c-red, #E53935);
  gap: 0.6rem;
}
.page-news .expand-btn::after {
  content: '→';
  display: inline-block;
  transition: transform 0.25s;
}
.page-news .expand-btn[aria-expanded="true"]::after {
  transform: rotate(90deg);
}

/* ===== FAQ 引导区 ===== */
.page-news .section-faq {
  margin-top: 2rem;
  margin-bottom: var(--news-category-gap);
}
.page-news .faq-prompt {
  background: var(--news-bg-faq);
  border-radius: var(--radius-xl, 24px);
  padding: 2rem 1.5rem;
  position: relative;
  overflow: hidden;
}
.page-news .faq-prompt::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -10%;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: rgba(229,57,53,0.08);
  pointer-events: none;
}
.page-news .faq-prompt-content {
  position: relative;
  z-index: 1;
}
.page-news .faq-prompt-text {
  font-size: 1.05rem;
  color: var(--c-silver, #B0BEC5);
  margin: 0 0 1.25rem;
  max-width: 36rem;
  line-height: 1.7;
}
.page-news .btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-body, 'Noto Sans SC', sans-serif);
  font-size: 0.9375rem;
  font-weight: 700;
  padding: 0.65rem 1.75rem;
  border: none;
  border-radius: 999px;
  background: var(--c-red, #E53935);
  color: #fff;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.25s, transform 0.2s, box-shadow 0.25s;
  letter-spacing: 0.02em;
}
.page-news .btn-primary:hover,
.page-news .btn-primary:focus-visible {
  background: #c62828;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(229,57,53,0.35);
}

/* ===== 更新日志区 ===== */
.page-news .section-changelog {
  margin-top: 2rem;
}
.page-news .changelog-inner {
  background: var(--news-bg-changelog);
  border-radius: var(--radius-xl, 24px);
  padding: 2rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  align-items: center;
  justify-content: space-between;
}
.page-news .changelog-text {
  flex: 1;
  min-width: 240px;
}
.page-news .changelog-text p {
  font-size: 0.95rem;
  color: var(--c-silver, #B0BEC5);
  margin: 0;
  line-height: 1.75;
  max-width: 36rem;
}
.page-news .changelog-chart {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm, 8px);
  object-fit: cover;
  width: 100%;
  max-height: 140px;
  background: rgba(0,0,0,0.2);
  box-shadow: 0 2px 12px rgba(0,0,0,0.25);
}

/* ===== 窄屏适配（移动端优先） ===== */
@media (max-width: 640px) {
  .page-news {
    padding: 1rem 0.75rem 2rem;
  }
  .page-news .breadcrumb {
    font-size: 0.75rem;
    gap: 0.35rem;
    margin-bottom: 1rem;
  }
  .page-news .news-cover-title {
    font-size: clamp(1.6rem, 8vw, 2.4rem);
  }
  .page-news .news-cover-desc {
    font-size: 0.875rem;
  }
  .page-news .filter-bar {
    gap: 0.35rem;
  }
  .page-news .filter-btn {
    font-size: 0.75rem;
    padding: 0.3rem 0.9rem;
  }
  .page-news .category-block {
    padding: 1rem 0.75rem;
    margin-bottom: 1.5rem;
  }
  .page-news .category-head {
    flex-direction: column;
    align-items: flex-start;
  }
  .page-news .category-img {
    width: 100%;
    max-height: 160px;
  }
  .page-news .article-card {
    flex-direction: column;
    padding: 0.875rem 1rem;
    gap: 0.75rem;
  }
  .page-news .card-icon {
    width: 2.25rem;
    height: 2.25rem;
  }
  .page-news .card-title {
    font-size: 1rem;
  }
  .page-news .card-summary {
    font-size: 0.85rem;
  }
  .page-news .expand-btn {
    font-size: 0.75rem;
  }
  .page-news .faq-prompt {
    padding: 1.5rem 1.25rem;
  }
  .page-news .faq-prompt-text {
    font-size: 0.9rem;
  }
  .page-news .btn-primary {
    font-size: 0.85rem;
    padding: 0.55rem 1.4rem;
  }
  .page-news .changelog-inner {
    flex-direction: column;
    padding: 1.5rem 1.25rem;
  }
  .page-news .changelog-text p {
    font-size: 0.875rem;
  }
  .page-news .section-title {
    font-size: clamp(1.2rem, 5vw, 1.6rem);
    margin-bottom: 1rem;
  }
}

/* ===== 桌面宽屏增强 ===== */
@media (min-width: 1024px) {
  .page-news {
    padding: 2rem 2rem 4rem;
  }
  .page-news .news-cover {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    justify-content: space-between;
    gap: 1.5rem 3rem;
    margin-bottom: 3.5rem;
  }
  .page-news .news-cover-title {
    margin-bottom: 0;
  }
  .page-news .news-cover-title::after {
    margin-top: 0.6rem;
  }
  .page-news .news-cover-desc {
    flex: 1;
    min-width: 260px;
    max-width: 36rem;
    margin: 0;
  }
  .page-news .filter-bar {
    flex-shrink: 0;
    width: 100%;
  }
  .page-news .category-block {
    padding: 2rem 2rem;
  }
  .page-news .card-stack {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
  }
  .page-news .article-card {
    padding: 1.25rem 1.5rem;
  }
  .page-news .category-img {
    width: 340px;
    max-height: 170px;
  }
  .page-news .faq-prompt {
    padding: 2.5rem 2.5rem;
  }
  .page-news .changelog-inner {
    padding: 2.5rem 2.5rem;
    flex-wrap: nowrap;
  }
  .page-news .changelog-chart {
    max-width: 420px;
  }
}