/* ============================================================
   LAYOUT — Grid Systems & Page Structure
   拓跋云 V4
   ============================================================ */

/* Grid Systems */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

/* Split Layout (text left, image right) */
.split-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.split-layout.reverse { direction: rtl; }
.split-layout.reverse > * { direction: ltr; }

/* Content Card Grid */
.card-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.card-grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

/* Two-column layout (main + sidebar) */
.layout-main-sidebar {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 40px;
  align-items: start;
}

/* Full-width gradient banner section */
.section-banner {
  padding: 0;
  background: linear-gradient(135deg, var(--red-700), var(--red-500));
  color: #fff;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.section-banner .container { padding: 80px 20px; position: relative; z-index: 1; }
.section-banner::before {
  content: '';
  position: absolute;
  top: -30%; right: -15%;
  width: 500px; height: 500px;
  border-radius: 50%;
  background: rgba(255,255,255,0.04);
}

/* Gray background block */
.block-gray {
  background: #F5F2ED;
  padding: 60px 0;
  border-radius: var(--radius-lg);
  margin: 40px 0;
}

/* Info list with icons */
.info-list { list-style: none; }
.info-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 0;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}
.info-list li::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--red-500);
  margin-top: 8px;
  flex-shrink: 0;
}

/* Tag / Badge */
.tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
  background: var(--red-50);
  color: var(--red-500);
  border: 1px solid var(--border-red);
}

/* Table styles */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.data-table th {
  background: var(--red-50);
  color: var(--red-500);
  font-weight: 600;
  text-align: left;
  padding: 12px 16px;
  border-bottom: 2px solid var(--red-200);
}
.data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-secondary);
}
.data-table tr:hover td { background: var(--gray-50); }

/* Horizontal rule with ornament */
.hr-ornament {
  text-align: center;
  margin: 40px 0;
  color: var(--red-500);
  font-size: 20px;
  letter-spacing: 8px;
}

/* Content prose (for article/rich text) */
.prose {
  font-size: 15px;
  line-height: 2;
  color: var(--text-secondary);
}
.prose h2 { font-size: 24px; color: var(--text-primary); margin: 40px 0 16px; }
.prose h3 { font-size: 20px; color: var(--text-primary); margin: 32px 0 12px; }
.prose p { margin-bottom: 16px; }
.prose ul, .prose ol { margin: 12px 0 16px 20px; }
.prose li { margin-bottom: 6px; }
.prose blockquote {
  border-left: 3px solid var(--red-500);
  padding: 12px 20px;
  background: var(--red-50);
  margin: 24px 0;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--text-primary);
}
.prose strong { color: var(--text-primary); }

/* Spacing utilities */
.mt-1 { margin-top: var(--space-1); } .mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); } .mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); } .mt-8 { margin-top: var(--space-8); }
.mb-2 { margin-bottom: var(--space-2); } .mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); } .mb-8 { margin-bottom: var(--space-8); }
.gap-2 { gap: var(--space-2); } .gap-4 { gap: var(--space-4); } .gap-6 { gap: var(--space-6); }