/* knowledge.css */
.knowledge-page { min-height: 100vh; }

/* Page hero */
.page-hero {
  position: relative; z-index: 1;
  padding: 140px 24px 80px;
  text-align: center;
  background: radial-gradient(ellipse at 50% 0%, rgba(212,168,78,0.07) 0%, transparent 60%);
  border-bottom: 1px solid var(--border);
}
.page-hero-eyebrow {
  font-size: 11px; letter-spacing: 0.25em; color: var(--gold-dim);
  text-transform: uppercase; margin-bottom: 16px;
}
.page-hero-title {
  font-family: 'Ma Shan Zheng', cursive; font-size: 48px;
  letter-spacing: 0.1em; color: var(--text); margin-bottom: 12px;
}
.page-hero-title em { font-style: normal; color: var(--gold); }
.page-hero-sub { font-size: 15px; color: var(--text-dim); letter-spacing: 0.06em; }

/* Filter tags */
.filter-bar-wrap {
  position: relative; z-index: 1;
  background: var(--filter-bg);
  border-bottom: 1px solid var(--border);
}
.filter-bar {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px 48px;
  display: flex; align-items: center; gap: 12px;
  overflow-x: auto;
  scrollbar-width: none;
}
.filter-bar::-webkit-scrollbar { display: none; }
.filter-tag {
  padding: 8px 20px; border-radius: 50px; white-space: nowrap;
  font-size: 13px; font-family: inherit; letter-spacing: 0.06em;
  background: transparent; border: 1px solid rgba(212,168,78,0.2);
  color: var(--text-dim); cursor: pointer; transition: all 0.2s;
}
.filter-tag:hover { border-color: var(--border); color: var(--text); }
.filter-tag.active { background: rgba(212,168,78,0.12); border-color: var(--gold-dim); color: var(--gold); }

/* Main layout */
.knowledge-main {
  position: relative; z-index: 1;
  max-width: 1200px; margin: 0 auto;
  padding: 56px 48px;
  display: grid; grid-template-columns: 1fr 320px; gap: 48px;
}

/* Article grid */
.article-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}

/* Article card */
.article-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 16px; overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s;
  text-decoration: none; display: block; color: var(--text);
}
.article-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 50px rgba(0,0,0,0.4), 0 0 30px rgba(212,168,78,0.07);
}
.article-image {
  height: 180px; position: relative;
  overflow: hidden; background: var(--bg);
}
.article-image img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.3s;
}
.article-card:hover .article-image img {
  transform: scale(1.05);
}
.img-lazy {
  opacity: 0; transition: opacity 0.3s;
}
.img-lazy.loaded {
  opacity: 1;
}
.card-cover {
  height: 140px; position: relative;
  display: flex; align-items: center; justify-content: center;
}
.card-cover-char {
  font-family: 'Ma Shan Zheng', cursive; font-size: 64px;
  opacity: 0.15; color: #fff;
}
.card-cat-badge {
  position: absolute; top: 12px; left: 12px;
  padding: 4px 10px; border-radius: 6px;
  font-size: 11px; letter-spacing: 0.06em; font-weight: 600;
  color: var(--ink);
}
.card-body { padding: 18px 20px 16px; }
.card-title {
  font-size: 15px; font-weight: 600; letter-spacing: 0.04em;
  color: var(--text); margin-bottom: 8px; line-height: 1.5;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.card-excerpt {
  font-size: 12px; line-height: 1.8; color: var(--text-dim); letter-spacing: 0.03em;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
  margin-bottom: 14px;
}
.card-meta {
  display: flex; align-items: center; gap: 12px;
  font-size: 11px; color: var(--text-faint); letter-spacing: 0.04em;
}
.card-meta-dot { width: 2px; height: 2px; border-radius: 50%; background: var(--text-faint); }

/* Category colors */
.cat-wuxing { background: var(--gold); }
.cat-shijing { background: var(--jade); }
.cat-ziyi    { background: var(--sky); }
.cat-jinji   { background: var(--vermilion); }
.cat-xingshi { background: #9E7A5A; }

/* Cover backgrounds by category */
.cover-wuxing { background: linear-gradient(135deg, rgba(212,168,78,0.15), rgba(212,168,78,0.05)); }
.cover-shijing { background: linear-gradient(135deg, rgba(92,160,138,0.15), rgba(92,160,138,0.05)); }
.cover-ziyi    { background: linear-gradient(135deg, rgba(106,144,194,0.15), rgba(106,144,194,0.05)); }
.cover-jinji   { background: linear-gradient(135deg, rgba(194,106,74,0.15), rgba(194,106,74,0.05)); }
.cover-xingshi { background: linear-gradient(135deg, rgba(158,122,90,0.15), rgba(158,122,90,0.05)); }

/* Pagination */
.pagination {
  margin-top: 48px; display: flex; justify-content: center;
  align-items: center; gap: 8px;
}
.page-btn {
  width: 38px; height: 38px; border-radius: 50%;
  background: transparent; border: 1px solid rgba(212,168,78,0.2);
  color: var(--text-dim); font-family: inherit; font-size: 13px;
  cursor: pointer; transition: all 0.2s;
  display: flex; align-items: center; justify-content: center;
}
.page-btn:hover { border-color: var(--gold-dim); color: var(--gold); }
.page-btn.active { background: var(--gold); border-color: var(--gold); color: var(--ink); font-weight: 600; }
.page-btn.nav { width: auto; padding: 0 14px; border-radius: 50px; }
.page-ellipsis { color: var(--text-faint); font-size: 13px; padding: 0 4px; }

/* Sidebar */
.knowledge-sidebar { display: flex; flex-direction: column; gap: 32px; }
.sidebar-widget {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 16px; padding: 24px;
}
.sidebar-widget-title {
  font-family: 'Ma Shan Zheng', cursive; font-size: 18px; color: var(--gold);
  letter-spacing: 0.08em; margin-bottom: 20px; padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.hot-article-list { display: flex; flex-direction: column; gap: 16px; }
.hot-article-item { display: flex; gap: 12px; align-items: flex-start; text-decoration: none; }
.hot-article-rank {
  width: 24px; height: 24px; border-radius: 6px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 700; color: var(--ink);
}
.rank-1 { background: var(--gold); }
.rank-2 { background: #C0C0C0; }
.rank-3 { background: #CD7F32; }
.rank-4, .rank-5 { background: rgba(212,168,78,0.2); color: var(--gold); }
.hot-article-text {}
.hot-article-title {
  font-size: 13px; color: var(--text); line-height: 1.5;
  letter-spacing: 0.04em; margin-bottom: 4px; transition: color 0.2s;
}
.hot-article-item:hover .hot-article-title { color: var(--gold); }
.hot-article-views { font-size: 11px; color: var(--text-faint); letter-spacing: 0.04em; }

/* CTA card */
.cta-card {
  background: linear-gradient(135deg, rgba(212,168,78,0.1), rgba(212,168,78,0.03));
  border: 1px solid rgba(212,168,78,0.3); border-radius: 16px; padding: 28px;
  text-align: center;
}
.cta-title {
  font-family: 'Ma Shan Zheng', cursive; font-size: 22px; color: var(--gold);
  letter-spacing: 0.1em; margin-bottom: 8px;
}
.cta-desc { font-size: 13px; color: var(--text-dim); line-height: 1.7; margin-bottom: 20px; }
.cta-btn {
  display: inline-block; padding: 12px 28px; border-radius: 50px;
  background: linear-gradient(135deg, var(--gold), #B88A32);
  color: var(--ink); font-family: 'Ma Shan Zheng', cursive;
  font-size: 16px; letter-spacing: 0.08em; text-decoration: none;
  box-shadow: 0 0 24px rgba(212,168,78,0.3);
  transition: all 0.3s;
}
.cta-btn:hover { box-shadow: 0 0 40px rgba(212,168,78,0.5); transform: translateY(-1px); }

@media (max-width: 1100px) {
  .knowledge-main { grid-template-columns: 1fr 280px; padding: 40px 24px; }
  .article-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .knowledge-main { grid-template-columns: 1fr; }
  .knowledge-sidebar { order: -1; }
  .filter-bar { padding: 16px 24px; }
}
@media (max-width: 600px) {
  .article-grid { grid-template-columns: 1fr; }
}