/* ==========================================================================
   建筑材料综合解决方案专属样式 solutions-building-materials.css (Western Global Partners)
   ========================================================================== */

/* 1. 业务简介与双图画廊 (Materials Overview) */
.mat-overview-section {
  padding: 85px 0;
  background-color: #ffffff;
}

.mat-overview-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
}

.mat-gallery-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.mat-gallery-wrap img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: 10px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
}

.mat-gallery-wrap img.span-2 {
  grid-column: span 2;
  height: 200px;
}

/* 2. 12 大建材品类网格 (12 Categories Grid) */
.mat-categories-section {
  padding: 90px 0;
  background-color: var(--bg-light);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.mat-cats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.mat-cat-card {
  background-color: var(--white);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 26px 22px;
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.02);
}

.mat-cat-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-gold);
  box-shadow: 0 12px 24px -6px rgba(0, 0, 0, 0.08);
}

.mat-cat-icon {
  width: 48px;
  height: 48px;
  border-radius: 8px;
  background-color: var(--bg-light);
  color: var(--accent-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 16px;
  border: 1px solid var(--border-color);
  transition: all 0.25s ease;
}

.mat-cat-card:hover .mat-cat-icon {
  background-color: var(--primary-navy);
  color: #ffd978;
  border-color: var(--primary-navy);
}

.mat-cat-card h3 {
  font-size: 16.5px;
  font-weight: 700;
  color: var(--primary-navy);
  margin-bottom: 8px;
  line-height: 1.35;
}

.mat-cat-card p {
  font-size: 13px;
  color: var(--text-gray);
  line-height: 1.6;
  flex: 1;
}

/* 3. 6 大采购全流程服务 (6 Sourcing Services) */
.mat-services-section {
  padding: 90px 0;
  background-color: #ffffff;
}

.mat-services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.mat-service-card {
  background-color: var(--bg-light);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 30px 26px;
  transition: all 0.25s ease;
}

.mat-service-card:hover {
  background-color: var(--white);
  border-color: var(--accent-gold);
  transform: translateY(-3px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.06);
}

.mat-service-num {
  font-size: 12px;
  font-weight: 800;
  color: var(--accent-gold);
  letter-spacing: 1.5px;
  margin-bottom: 10px;
}

.mat-service-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--primary-navy);
  margin-bottom: 10px;
}

.mat-service-card p {
  font-size: 13.5px;
  color: var(--text-gray);
  line-height: 1.65;
}

/* 4. 合作优势网格 (Advantages Grid) */
.mat-adv-section {
  padding: 90px 0;
  background-color: var(--primary-navy);
  color: var(--white);
}

.mat-adv-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.mat-adv-card {
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 12px;
  padding: 28px 24px;
  transition: all 0.25s ease;
}

.mat-adv-card:hover {
  background-color: rgba(255, 255, 255, 0.09);
  border-color: #ffd978;
  transform: translateY(-4px);
}

.mat-adv-icon {
  font-size: 28px;
  color: #ffd978;
  margin-bottom: 16px;
}

.mat-adv-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 10px;
}

.mat-adv-card p {
  font-size: 13.5px;
  color: #cbd5e1;
  line-height: 1.65;
}

/* 5. 7 步合作推进流程 (7-Step Workflow Timeline) */
.mat-flow-section {
  padding: 85px 0;
  background-color: #ffffff;
}

.mat-flow-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 14px;
  margin-top: 40px;
}

.mat-flow-card {
  background-color: var(--bg-light);
  border: 1px solid var(--border-color);
  border-top: 4px solid var(--accent-gold);
  border-radius: 8px;
  padding: 20px 14px;
  text-align: center;
  transition: all 0.25s ease;
}

.mat-flow-card:hover {
  background-color: var(--white);
  transform: translateY(-4px);
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.06);
}

.mat-flow-num {
  font-size: 11px;
  font-weight: 800;
  color: var(--accent-gold);
  margin-bottom: 6px;
}

.mat-flow-card h4 {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--primary-navy);
  margin-bottom: 4px;
}

.mat-flow-card p {
  font-size: 11.5px;
  color: var(--text-gray);
  line-height: 1.45;
}

/* 响应式适配 */
@media (max-width: 1200px) {
  .mat-cats-grid,
  .mat-adv-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .mat-services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .mat-flow-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (max-width: 1024px) {
  .mat-overview-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .mat-cats-grid,
  .mat-adv-grid,
  .mat-services-grid,
  .mat-flow-grid,
  .mat-gallery-wrap {
    grid-template-columns: 1fr;
  }
  .mat-gallery-wrap img.span-2 {
    grid-column: span 1;
  }
}