/* ===== 二级页面通用布局 ===== */
.banner {
  position: relative; height: 320px;
  margin-top: 43px;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
  background: center/cover no-repeat;
}
.banner::before {
  content: '';
  position: absolute; inset: 0;
  background: rgba(0, 51, 102, 0.35);
  z-index: 1;
}
.banner-content {
  position: relative; z-index: 2;
  text-align: center;
}
.banner h1 {
  font-size: 42px; font-weight: 900; color: #fff;
  margin-bottom: 12px;
}
.banner-sub {
  font-size: 16px; color: rgba(255,255,255,0.8);
}

.breadcrumb {
  padding: 16px 40px;
  max-width: 1280px; margin: 0 auto;
  font-size: 13px; color: var(--text-dim);
}
.breadcrumb a { color: var(--primary); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }

.main-content {
  max-width: 1280px; margin: 0 auto;
  padding: 0 40px 80px;
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 48px;
}
.main-content.single-column {
  grid-template-columns: 1fr;
}

.sidebar {
  position: sticky; top: 100px;
  align-self: start;
}
.sidebar-title {
  font-size: 18px; font-weight: 800; color: var(--text);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--primary);
}
.sidebar-menu { list-style: none; }
.sidebar-menu li { margin-bottom: 4px; }
.sidebar-menu a {
  display: block;
  padding: 12px 16px;
  color: var(--text-dim);
  text-decoration: none;
  font-size: 14px;
  border-radius: 8px;
  transition: all 0.25s;
}
.sidebar-menu a:hover { color: var(--primary); background: var(--primary-light); }
.sidebar-menu a.active { color: var(--primary); background: var(--primary-light); font-weight: 700; }

.content-area {
  background: var(--white);
  border-radius: 18px;
  padding: 48px;
  box-shadow: var(--shadow);
}
.content-area h2 {
  font-size: 28px;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--primary);
}

.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 40px;
}
.page-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  color: var(--text-dim);
  cursor: pointer;
  transition: all 0.25s;
  text-decoration: none;
}
.page-btn.disabled {
  opacity: 0.4;
  pointer-events: none;
}
.page-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.page-btn.active {
  background: var(--gradient);
  color: #fff;
  border-color: var(--primary);
}

@media (max-width: 1024px) {
  .main-content { grid-template-columns: 1fr; gap: 24px; }
  .sidebar { display: none; }
}
@media (max-width: 768px) {
  .banner { height: 240px; margin-top: 68px; }
  .banner h1 { font-size: 28px; }
  .breadcrumb { padding: 12px 16px; }
  .main-content {
    grid-template-columns: 1fr;
    padding: 0 16px 48px;
    gap: 0;
  }
  .content-area { padding: 24px 18px; }
  .pagination {
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 28px;
  }
  .page-btn {
    width: 36px;
    height: 36px;
    font-size: 13px;
  }
}