.page-news {
  --news-gold-glow: 0 0 12px rgba(212, 175, 55, 0.3);
  --news-card-radius: 6px;
  --news-list-width: 380px;
  --news-transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --news-grid-gap: 1.5rem;
  display: block;
  max-width: var(--max-width, 1200px);
  margin: 0 auto;
  padding: var(--space-md, 2rem) var(--space-sm, 1rem) var(--space-xl, 8rem);
  color: var(--color-text, #f0f0f0);
}

/* ---------- 面包屑 ---------- */
.page-news .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-body, 'Inter', sans-serif);
  font-size: 0.85rem;
  color: var(--color-gold, #f5e6a3);
  margin-bottom: var(--space-md, 2rem);
  opacity: 0.8;
}
.page-news .breadcrumb a {
  color: var(--color-gold, #f5e6a3);
  text-decoration: none;
  transition: color var(--news-transition);
}
.page-news .breadcrumb a:hover {
  color: var(--color-accent, #39ff14);
}
.page-news .breadcrumb-sep {
  color: var(--color-accent, #39ff14);
}

/* ---------- 头图 ---------- */
.page-news .hero-visual {
  position: relative;
  width: 100%;
  border-radius: var(--news-card-radius);
  overflow: hidden;
  margin-bottom: var(--space-lg, 4rem);
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.5);
}
.page-news .hero-image {
  display: block;
  width: 100%;
  height: auto;
  max-height: 400px;
  object-fit: cover;
  object-position: center 30%;
}

/* ---------- 标题区 ---------- */
.page-news .page-title {
  font-family: var(--font-heading, 'Montserrat', sans-serif);
  font-size: clamp(2rem, 5vw, 3.6rem);
  font-weight: 700;
  color: var(--color-title, #f5e6a3);
  text-shadow: 0 0 20px rgba(212, 175, 55, 0.25);
  margin: 0 0 0.5rem;
  line-height: 1.15;
  letter-spacing: 0.02em;
}
.page-news .page-description {
  font-family: var(--font-body, 'Inter', sans-serif);
  font-size: clamp(0.95rem, 1.5vw, 1.1rem);
  color: var(--color-text, #f0f0f0);
  max-width: 640px;
  margin: 0 0 var(--space-md, 2rem);
  line-height: 1.6;
  opacity: 0.85;
}

/* ---------- 分类筛选标签 ---------- */
.page-news .filter-section {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: var(--space-lg, 4rem);
  position: relative;
}
.page-news .filter-radio {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}
.page-news .filter-label {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1.1rem;
  font-family: var(--font-accent, 'Orbitron', monospace);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-gold, #f5e6a3);
  background: var(--color-card, #2a1a4e);
  border: 1px solid rgba(212, 175, 55, 0.25);
  border-radius: 999px;
  cursor: pointer;
  transition: all var(--news-transition);
  user-select: none;
}
.page-news .filter-label:hover {
  border-color: var(--color-accent, #39ff14);
  box-shadow: 0 0 12px rgba(57, 255, 20, 0.15);
}
.page-news .filter-radio:checked + .filter-label {
  background: linear-gradient(135deg, #d4af37, #f0e68c);
  color: #1a0a2e;
  border-color: transparent;
  box-shadow: 0 0 20px rgba(212, 175, 55, 0.35);
  font-weight: 700;
}
.page-news .filter-icon {
  width: 20px;
  height: 20px;
  object-fit: contain;
  flex-shrink: 0;
  opacity: 0.8;
}
.page-news .filter-radio:checked + .filter-label .filter-icon {
  opacity: 1;
}

/* ---------- 文章左右对照区 ---------- */
.page-news .article-viewer {
  display: flex;
  gap: var(--space-lg, 4rem);
  align-items: flex-start;
  margin-bottom: var(--space-lg, 4rem);
  position: relative;
}

/* ----- 左侧列表 ----- */
.page-news .article-list {
  flex: 0 0 var(--news-list-width, 380px);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  position: relative;
}
.page-news .article-item {
  position: relative;
  padding: 1.2rem 1.4rem;
  background: var(--color-card, #2a1a4e);
  border-radius: var(--news-card-radius);
  border-left: 3px solid transparent;
  cursor: pointer;
  transition: all var(--news-transition);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.page-news .article-item:hover,
.page-news .article-item:focus-within {
  border-left-color: var(--color-accent, #39ff14);
  background: #301e5a;
  transform: translateX(6px);
  box-shadow: 0 4px 20px rgba(57, 255, 20, 0.08);
  outline: none;
}
.page-news .item-tag {
  font-family: var(--font-accent, 'Orbitron', monospace);
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.15rem 0.6rem;
  border-radius: 3px;
  display: inline-block;
  width: fit-content;
}
.page-news .tag-announce {
  background: rgba(212, 175, 55, 0.18);
  color: #f5e6a3;
  border: 1px solid rgba(212, 175, 55, 0.3);
}
.page-news .tag-standard {
  background: rgba(57, 255, 20, 0.12);
  color: #39ff14;
  border: 1px solid rgba(57, 255, 20, 0.25);
}
.page-news .tag-guide {
  background: rgba(106, 13, 173, 0.25);
  color: #d4af37;
  border: 1px solid rgba(212, 175, 55, 0.2);
}
.page-news .item-title {
  font-family: var(--font-heading, 'Montserrat', sans-serif);
  font-size: clamp(1rem, 1.4vw, 1.15rem);
  font-weight: 600;
  color: var(--color-title, #f5e6a3);
  margin: 0;
  line-height: 1.3;
  transition: color var(--news-transition);
}
.page-news .article-item:hover .item-title {
  color: var(--color-accent, #39ff14);
}
.page-news .item-summary {
  font-family: var(--font-body, 'Inter', sans-serif);
  font-size: 0.82rem;
  color: var(--color-text, #f0f0f0);
  opacity: 0.7;
  margin: 0;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ----- 右侧预览叠层 ----- */
.page-news .article-preview-stack {
  flex: 1;
  min-width: 0;
  position: relative;
}
.page-news .preview-hint {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 320px;
  color: var(--color-gold, #f5e6a3);
  opacity: 0.5;
  font-family: var(--font-body, 'Inter', sans-serif);
  font-size: 0.95rem;
  text-align: center;
  gap: 0.6rem;
  border: 1px dashed rgba(212, 175, 55, 0.2);
  border-radius: var(--news-card-radius);
  padding: var(--space-md, 2rem);
}
.page-news .hint-icon {
  display: block;
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, #d4af37, #f0e68c);
  clip-path: polygon(25% 10%, 75% 10%, 100% 50%, 75% 90%, 25% 90%, 0% 50%);
  opacity: 0.4;
}

.page-news .article-preview {
  display: none;
  gap: var(--space-md, 2rem);
  align-items: flex-start;
  background: var(--color-card, #2a1a4e);
  border-radius: var(--news-card-radius);
  padding: var(--space-md, 2rem);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(212, 175, 55, 0.1);
}

/* 默认显示第一篇预览（无悬停且无筛选时） */
.page-news .article-viewer:not(:has(.article-item:hover)) .article-preview[data-article="1"] {
  display: flex;
}

/* 有悬停时隐藏提示，显示对应预览 */
.page-news .article-viewer:has(.article-item:hover) .preview-hint {
  display: none;
}
.page-news .article-viewer:has(.article-item[data-article="1"]:hover) .article-preview[data-article="1"] { display: flex; }
.page-news .article-viewer:has(.article-item[data-article="2"]:hover) .article-preview[data-article="2"] { display: flex; }
.page-news .article-viewer:has(.article-item[data-article="3"]:hover) .article-preview[data-article="3"] { display: flex; }
.page-news .article-viewer:has(.article-item[data-article="4"]:hover) .article-preview[data-article="4"] { display: flex; }

/* 有悬停时隐藏其他预览 */
.page-news .article-viewer:has(.article-item[data-article="1"]:hover) .article-preview:not([data-article="1"]) { display: none; }
.page-news .article-viewer:has(.article-item[data-article="2"]:hover) .article-preview:not([data-article="2"]) { display: none; }
.page-news .article-viewer:has(.article-item[data-article="3"]:hover) .article-preview:not([data-article="3"]) { display: none; }
.page-news .article-viewer:has(.article-item[data-article="4"]:hover) .article-preview:not([data-article="4"]) { display: none; }

/* ---------- 分类筛选对列表的影响 ---------- */
#cat-all:checked ~ .article-viewer .article-item { display: flex; }
#cat-all:checked ~ .article-viewer .preview-hint { display: flex; }
#cat-all:checked ~ .article-viewer .article-preview[data-article="1"] { display: flex; }

#cat-announce:checked ~ .article-viewer .article-item:not([data-category="announce"]) { display: none; }
#cat-announce:checked ~ .article-viewer .article-item[data-category="announce"] { display: flex; }
#cat-announce:checked ~ .article-viewer .preview-hint { display: none; }
#cat-announce:checked ~ .article-viewer .article-preview { display: none; }
#cat-announce:checked ~ .article-viewer .article-preview[data-category="announce"] { display: flex; }

#cat-standard:checked ~ .article-viewer .article-item:not([data-category="standard"]) { display: none; }
#cat-standard:checked ~ .article-viewer .article-item[data-category="standard"] { display: flex; }
#cat-standard:checked ~ .article-viewer .preview-hint { display: none; }
#cat-standard:checked ~ .article-viewer .article-preview { display: none; }
#cat-standard:checked ~ .article-viewer .article-preview[data-category="standard"] { display: flex; }

#cat-guide:checked ~ .article-viewer .article-item:not([data-category="guide"]) { display: none; }
#cat-guide:checked ~ .article-viewer .article-item[data-category="guide"] { display: flex; }
#cat-guide:checked ~ .article-viewer .preview-hint { display: none; }
#cat-guide:checked ~ .article-viewer .article-preview { display: none; }
#cat-guide:checked ~ .article-viewer .article-preview[data-category="guide"] { display: flex; }

/* 筛选状态下悬停仍可切换预览（覆盖筛选默认显示） */
#cat-announce:checked ~ .article-viewer:has(.article-item[data-article="2"]:hover) .article-preview { display: none; }
#cat-announce:checked ~ .article-viewer:has(.article-item[data-article="2"]:hover) .article-preview[data-article="2"] { display: flex; }
#cat-standard:checked ~ .article-viewer:has(.article-item[data-article="2"]:hover) .article-preview { display: none; }
#cat-standard:checked ~ .article-viewer:has(.article-item[data-article="2"]:hover) .article-preview[data-article="2"] { display: flex; }
#cat-guide:checked ~ .article-viewer:has(.article-item[data-article="3"]:hover) .article-preview { display: none; }
#cat-guide:checked ~ .article-viewer:has(.article-item[data-article="3"]:hover) .article-preview[data-article="3"] { display: flex; }
#cat-guide:checked ~ .article-viewer:has(.article-item[data-article="4"]:hover) .article-preview { display: none; }
#cat-guide:checked ~ .article-viewer:has(.article-item[data-article="4"]:hover) .article-preview[data-article="4"] { display: flex; }

/* 筛选后无悬停时恢复筛选默认 */
#cat-announce:checked ~ .article-viewer:not(:has(.article-item:hover)) .article-preview { display: none; }
#cat-announce:checked ~ .article-viewer:not(:has(.article-item:hover)) .article-preview[data-category="announce"] { display: flex; }
#cat-standard:checked ~ .article-viewer:not(:has(.article-item:hover)) .article-preview { display: none; }
#cat-standard:checked ~ .article-viewer:not(:has(.article-item:hover)) .article-preview[data-category="standard"] { display: flex; }
#cat-guide:checked ~ .article-viewer:not(:has(.article-item:hover)) .article-preview { display: none; }
#cat-guide:checked ~ .article-viewer:not(:has(.article-item:hover)) .article-preview[data-category="guide"] { display: flex; }

/* ---------- 预览内容样式 ---------- */
.page-news .preview-image {
  width: 280px;
  max-width: 40%;
  height: auto;
  border-radius: var(--news-card-radius);
  object-fit: cover;
  flex-shrink: 0;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}
.page-news .preview-content {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.page-news .preview-tag {
  font-family: var(--font-accent, 'Orbitron', monospace);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.2rem 0.7rem;
  border-radius: 3px;
  display: inline-block;
  width: fit-content;
}
.page-news .preview-title {
  font-family: var(--font-heading, 'Montserrat', sans-serif);
  font-size: clamp(1.15rem, 1.8vw, 1.45rem);
  font-weight: 600;
  color: var(--color-title, #f5e6a3);
  margin: 0;
  line-height: 1.25;
  text-shadow: var(--news-gold-glow);
}
.page-news .preview-text {
  font-family: var(--font-body, 'Inter', sans-serif);
  font-size: 0.9rem;
  color: var(--color-text, #f0f0f0);
  line-height: 1.7;
  margin: 0;
  opacity: 0.88;
}
.page-news .btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1.4rem;
  font-family: var(--font-body, 'Inter', sans-serif);
  font-size: 0.85rem;
  font-weight: 600;
  color: #1a0a2e;
  background: linear-gradient(135deg, #d4af37, #f0e68c);
  border: none;
  border-radius: var(--border-radius, 8px);
  text-decoration: none;
  width: fit-content;
  transition: all var(--news-transition);
  box-shadow: 0 2px 12px rgba(212, 175, 55, 0.15);
}
.page-news .btn:hover {
  background: linear-gradient(135deg, #39ff14, #2fd812);
  color: #0d0520;
  box-shadow: 0 0 24px rgba(57, 255, 20, 0.3);
  transform: translateY(-2px);
}

/* ---------- 底部引导 ---------- */
.page-news .section-footer {
  margin-top: var(--space-lg, 4rem);
  padding-top: var(--space-md, 2rem);
  border-top: 1px solid rgba(212, 175, 55, 0.12);
}
.page-news .section-footer p {
  font-family: var(--font-body, 'Inter', sans-serif);
  font-size: 0.9rem;
  color: var(--color-text, #f0f0f0);
  opacity: 0.7;
  text-align: center;
}
.page-news .section-footer a {
  color: var(--color-accent, #39ff14);
  text-decoration: none;
  transition: color var(--news-transition);
}
.page-news .section-footer a:hover {
  color: var(--color-gold, #f5e6a3);
  text-decoration: underline;
}

/* ========== 移动端响应式 ========== */
@media (max-width: 820px) {
  .page-news {
    padding: var(--space-sm, 1rem) var(--space-xs, 0.5rem) var(--space-lg, 4rem);
  }
  .page-news .hero-visual {
    margin-bottom: var(--space-md, 2rem);
  }
  .page-news .hero-image {
    max-height: 240px;
  }
  .page-news .page-title {
    font-size: clamp(1.6rem, 6vw, 2.2rem);
  }
  .page-news .page-description {
    font-size: 0.9rem;
    max-width: 100%;
  }
  .page-news .filter-section {
    gap: 0.4rem;
    margin-bottom: var(--space-md, 2rem);
  }
  .page-news .filter-label {
    font-size: 0.7rem;
    padding: 0.35rem 0.8rem;
  }
  .page-news .filter-icon {
    width: 16px;
    height: 16px;
  }

  .page-news .article-viewer {
    flex-direction: column;
    gap: var(--space-md, 2rem);
  }
  .page-news .article-list {
    flex: none;
    width: 100%;
  }
  .page-news .article-item {
    padding: 0.9rem 1.1rem;
  }
  .page-news .article-item:hover {
    transform: none;
  }
  .page-news .item-title {
    font-size: 1rem;
  }
  .page-news .item-summary {
    font-size: 0.8rem;
  }

  .page-news .article-preview-stack {
    width: 100%;
  }
  .page-news .preview-hint {
    display: none !important; /* 移动端不需要提示 */
  }
  .page-news .article-preview {
    flex-direction: column;
    padding: var(--space-sm, 1rem);
    gap: 1rem;
  }
  .page-news .preview-image {
    width: 100%;
    max-width: 100%;
    height: auto;
  }
  .page-news .preview-title {
    font-size: 1.1rem;
  }
  .page-news .preview-text {
    font-size: 0.85rem;
  }
  .page-news .btn {
    font-size: 0.8rem;
    padding: 0.5rem 1.1rem;
  }

  /* 移动端：默认显示所有预览（手风琴效果） */
  .page-news .article-viewer:not(:has(.article-item:hover)) .article-preview[data-article="1"],
  .page-news .article-viewer:not(:has(.article-item:hover)) .article-preview[data-article="2"],
  .page-news .article-viewer:not(:has(.article-item:hover)) .article-preview[data-article="3"],
  .page-news .article-viewer:not(:has(.article-item:hover)) .article-preview[data-article="4"] {
    display: none;
  }
  .page-news .article-item:first-child:focus-within ~ .article-preview-stack .article-preview[data-article="1"],
  .page-news .article-item:first-child:hover ~ .article-preview-stack .article-preview[data-article="1"] {
    display: flex;
  }

  /* 移动端分类筛选依然有效，默认显示该分类第一篇 */
  #cat-all:checked ~ .article-viewer .article-item:first-child[data-category] ~ .article-preview-stack .article-preview[data-article="1"] { display: flex; }
  #cat-all:checked ~ .article-viewer .article-item:first-child[data-category] ~ .article-preview-stack .article-preview[data-article="2"] { display: none; }
  #cat-all:checked ~ .article-viewer .article-item:first-child[data-category] ~ .article-preview-stack .article-preview[data-article="3"] { display: none; }
  #cat-all:checked ~ .article-viewer .article-item:first-child[data-category] ~ .article-preview-stack .article-preview[data-article="4"] { display: none; }

  /* 移动端筛选时只显示对应分类的第一篇预览 */
  #cat-all:checked ~ .article-viewer .article-preview { display: none; }
  #cat-all:checked ~ .article-viewer .article-preview[data-article="1"] { display: flex; }
  #cat-announce:checked ~ .article-viewer .article-preview { display: none; }
  #cat-announce:checked ~ .article-viewer .article-preview[data-article="1"] { display: flex; }
  #cat-standard:checked ~ .article-viewer .article-preview { display: none; }
  #cat-standard:checked ~ .article-viewer .article-preview[data-article="2"] { display: flex; }
  #cat-guide:checked ~ .article-viewer .article-preview { display: none; }
  #cat-guide:checked ~ .article-viewer .article-preview[data-article="3"] { display: flex; }

  /* 移动端悬停/点击切换（辅助） */
  .page-news .article-item:hover ~ .article-preview-stack .article-preview { display: none !important; }
  .page-news .article-item[data-article="1"]:hover ~ .article-preview-stack .article-preview[data-article="1"] { display: flex !important; }
  .page-news .article-item[data-article="2"]:hover ~ .article-preview-stack .article-preview[data-article="2"] { display: flex !important; }
  .page-news .article-item[data-article="3"]:hover ~ .article-preview-stack .article-preview[data-article="3"] { display: flex !important; }
  .page-news .article-item[data-article="4"]:hover ~ .article-preview-stack .article-preview[data-article="4"] { display: flex !important; }
}

@media (max-width: 480px) {
  .page-news {
    padding: var(--space-xs, 0.5rem) var(--space-xs, 0.5rem) var(--space-lg, 4rem);
  }
  .page-news .page-title {
    font-size: 1.4rem;
  }
  .page-news .filter-label {
    font-size: 0.65rem;
    padding: 0.25rem 0.6rem;
  }
  .page-news .article-item {
    padding: 0.7rem 0.9rem;
  }
  .page-news .item-title {
    font-size: 0.9rem;
  }
  .page-news .item-summary {
    font-size: 0.75rem;
  }
  .page-news .preview-title {
    font-size: 1rem;
  }
}