/*
 * =======================================
 *  list.css — 目录页/栏目列表页独有样式
 *  依赖：base.css（全局变量 + 通用组件 + 响应式基础）
 * =======================================
 */

/* ===== Page Banner ===== */
.page-banner {
  background: linear-gradient(135deg, #002F5F 0%, #0050A5 40%, #0D58AA 100%);
  padding: 48px 0 56px;
  position: relative;
  overflow: hidden;
}
.page-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 80% 20%, rgba(223, 76, 54, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 20% 80%, rgba(74, 154, 232, 0.12) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(13, 88, 170, 0.08) 0%, transparent 40%);
}
.page-banner .container { position: relative; z-index: 1; }
.page-banner h1 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  color: var(--white);
  margin-bottom: 8px;
  letter-spacing: 2px;
}
.page-banner .subtitle {
  font-size: 15px;
  color: var(--navy-200);
  font-weight: 400;
}

/* ===== Main Layout ===== */
.page-main { padding: 48px 0 80px; }
.page-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 40px;
}

/* ===== Sidebar ===== */
.sidebar {
  position: sticky;
  top: 120px;
  align-self: start;
}
.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--gray-600);
  border-radius: var(--radius-sm);
  border-left: 3px solid transparent;
  transition: all var(--transition-fast);
}
.sidebar-nav a:hover {
  background: linear-gradient(90deg, var(--navy-50), transparent);
  color: var(--navy-600);
  border-left-color: var(--navy-400);
}
.sidebar-nav a.active {
  background: linear-gradient(90deg, #FDE0DA, #FFF5F2, transparent);
  color: var(--gold-600);
  font-weight: 700;
  border-left-color: var(--gold-500);
}
.sidebar-nav a .icon {
  font-size: 16px;
  flex-shrink: 0;
  width: 20px;
  text-align: center;
}
.sidebar-widget {
  margin-top: 32px;
  background: var(--gray-50);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--gray-100);
}
.sidebar-widget h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--navy-800);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid;
  border-image: linear-gradient(90deg, var(--gold-500), var(--navy-500)) 1;
}
.sidebar-widget ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.sidebar-widget li a {
  font-size: 14px;
  color: var(--gray-600);
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all var(--transition-fast);
}
.sidebar-widget li a::before {
  content: '';
  width: 4px;
  height: 4px;
  background: var(--gold-500);
  border-radius: 50%;
  flex-shrink: 0;
}
.sidebar-widget li a:hover { color: var(--navy-600); }

/* ===== Content Header ===== */
.content-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--gray-100);
}
.content-header h2 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  color: var(--navy-800);
}
.content-header .count {
  font-size: 13px;
  color: var(--gray-400);
  font-weight: 400;
}

/* ===== Filter Tabs ===== */
.filter-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}
.filter-tab {
  padding: 8px 20px;
  font-size: 14px;
  font-weight: 500;
  border: 1px solid var(--gray-200);
  border-radius: 100px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  background: var(--white);
  color: var(--gray-600);
}
.filter-tab:hover:not(.active) {
  border-color: var(--navy-200);
  background: var(--navy-50);
  color: var(--navy-600);
}
.filter-tab.active {
  background: linear-gradient(135deg, var(--navy-600), var(--navy-500));
  border-color: transparent;
  box-shadow: 0 2px 12px rgba(13, 88, 170, 0.3);
  color: white;
}

/* ===== Article Cards ===== */
.article-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.article-card {
  display: flex;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--gray-100);
  transition: all 0.3s ease;
  cursor: pointer;
  border-radius: var(--radius-md);
}
.article-card:hover {
  padding-left: 8px;
  background: linear-gradient(135deg, var(--navy-50), transparent);
}
.article-card:hover .article-title { color: var(--navy-600); }
.article-card-img {
  flex-shrink: 0;
  width: 200px;
  height: 130px;
  border-radius: var(--radius-md);
  overflow: hidden;
}
.article-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-base);
}
.article-card:hover .article-card-img img { transform: scale(1.05); }
.article-card-body {
  flex: 1;
  display: flex;
  flex-direction: column;
}
.article-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--gray-400);
  margin-bottom: 8px;
}
.article-card-meta .tag {
  font-size: 11px;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 4px;
}
.article-card-meta .tag.blue {
  background: linear-gradient(90deg, #E8F1FF, #CCE1FA);
  color: var(--navy-600);
}
.article-card-meta .tag.green {
  background: linear-gradient(90deg, #cffafe, #a5f3fc);
  color: #0891b2;
}
.article-card-meta .tag.amber {
  background: linear-gradient(90deg, #fef3c7, #fde68a);
  color: #d97706;
}
.article-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--gray-800);
  line-height: 1.5;
  margin-bottom: 10px;
  transition: color var(--transition-fast);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.article-card-excerpt {
  font-size: 14px;
  color: var(--gray-500);
  line-height: 1.7;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 12px;
}
.article-card-footer {
  display: flex;
  align-items: center;
  gap: 16px;
}
.article-card-footer .views {
  font-size: 12px;
  color: var(--gray-400);
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ===== Compact List ===== */
.article-compact {
  padding: 18px 0;
  border-bottom: 1px solid var(--gray-100);
  display: flex;
  align-items: center;
  gap: 20px;
  transition: all var(--transition-fast);
  cursor: pointer;
}
.article-compact:hover { padding-left: 8px; }
.article-compact:hover .compact-title { color: var(--navy-600); }
.compact-date {
  flex-shrink: 0;
  text-align: center;
  width: 70px;
}
.compact-date .day {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 700;
  color: var(--navy-700);
  line-height: 1;
}
.compact-date .month {
  font-size: 12px;
  color: var(--gray-400);
}
.compact-title {
  flex: 1;
  font-size: 15px;
  color: var(--gray-700);
  line-height: 1.5;
  transition: color var(--transition-fast);
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.compact-arrow {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--gray-50);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}
.article-compact:hover .compact-arrow { background: var(--navy-50); }
.compact-arrow svg {
  width: 14px;
  height: 14px;
  color: var(--gray-400);
}

/* ===== Pagination ===== */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-top: 40px;
}
.pagination a,
.pagination span {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 12px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.pagination a {
  color: var(--gray-600);
  border: 1px solid var(--gray-200);
}
.pagination a:hover {
  border-color: var(--navy-200);
  color: var(--navy-600);
  background: var(--navy-50);
}
.pagination .active {
  background: linear-gradient(135deg, var(--navy-600), var(--navy-500));
  color: var(--white);
  border-color: transparent;
}
.pagination .disabled {
  color: var(--gray-300);
  border: 1px solid var(--gray-200);
  cursor: default;
}

/* ==========================================================================
 *  RESPONSIVE — 目录页独有布局
 *  全局组件（header/footer/container）响应式规则已在 base.css 中定义
 * ========================================================================== */

/* --- Tablet: <= 1024px --- */
@media (max-width: 1024px) {
  .page-layout {
    grid-template-columns: 200px 1fr;
    gap: 28px;
  }
  .article-card-img { width: 160px; height: 110px; }
}

/* --- Mobile: <= 768px --- */
@media (max-width: 768px) {
  .page-banner { padding: 32px 0 40px; }
  .page-banner h1 { font-size: 24px; }
  .page-main { padding: 28px 0 48px; }

  /* Single column: sidebar collapses above content */
  .page-layout {
    grid-template-columns: 1fr;
    gap: 0;
  }
  .sidebar {
    position: static;
    margin-bottom: 24px;
  }
  .sidebar-nav {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 6px;
  }
  .sidebar-nav a {
    padding: 8px 14px;
    font-size: 13px;
    border-left: none;
    border-bottom: 2px solid transparent;
  }
  .sidebar-nav a.active {
    border-left: none;
    border-bottom: 2px solid var(--gold-500);
    background: linear-gradient(180deg, #FDE0DA, transparent);
  }
  .sidebar-widget {
    margin-top: 16px;
    padding: 16px;
  }

  /* Content header */
  .content-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 20px;
  }
  .content-header h2 { font-size: 18px; }

  /* Filter tabs scrollable */
  .filter-tabs {
    gap: 6px;
    margin-bottom: 20px;
  }
  .filter-tab { padding: 6px 14px; font-size: 13px; }

  /* Article cards: image above text */
  .article-card {
    flex-direction: column;
    gap: 16px;
    padding: 20px 0;
  }
  .article-card:hover { padding-left: 0; }
  .article-card-img {
    width: 100%;
    height: 180px;
  }

  /* Compact list */
  .compact-date .day { font-size: 20px; }
  .compact-title { font-size: 14px; }

  /* Pagination */
  .pagination { gap: 4px; }
  .pagination a,
  .pagination span {
    min-width: 34px;
    height: 34px;
    font-size: 13px;
  }
}

/* --- Small Mobile: <= 480px --- */
@media (max-width: 480px) {
  .article-card-img { height: 150px; }
  .article-title { font-size: 15px; }
  .compact-date { width: 44px; }
  .compact-date .day { font-size: 18px; }
}