/* ============================================
   产品中心 - 页面样式
   ============================================ */

/* ---- 产品快速导航 ---- */
.section-sm {
  padding: 32px 0;
}

.product-nav-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.product-nav-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: var(--transition);
  text-decoration: none;
}

.product-nav-item:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.pn-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: #fff;
  flex-shrink: 0;
}

.pn-info {
  display: flex;
  flex-direction: column;
}

.pn-series {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 1px;
}

.pn-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--bg-dark);
}

/* ---- 产品详情区 ---- */
.product-detail.alt {
  background: var(--bg-light);
}

.product-detail-grid {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 60px;
  align-items: center;
}

.product-detail-grid.reverse {
  direction: rtl;
}

.product-detail-grid.reverse > * {
  direction: ltr;
}

.product-badge {
  display: inline-block;
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  padding: 6px 16px;
  border-radius: 50px;
  margin-bottom: 16px;
  letter-spacing: 2px;
}

.product-detail-info h2 {
  font-size: 28px;
  font-weight: 800;
  color: var(--bg-dark);
  margin-bottom: 16px;
}

.product-detail-info > p {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: 24px;
}

/* ---- 功能特性网格 ---- */
.product-features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 28px;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text);
}

.feature-item i {
  color: var(--accent);
  font-size: 14px;
}

/* ---- 产品视觉卡片 ---- */
.product-detail-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-visual-card {
  background: linear-gradient(135deg, var(--accent, var(--primary)), var(--primary));
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
  color: #fff;
  width: 100%;
  max-width: 360px;
  position: relative;
  overflow: hidden;
}

.product-visual-card::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: rgba(255,255,255,0.05);
  border-radius: 50%;
}

.visual-icon {
  font-size: 64px;
  margin-bottom: 20px;
  opacity: 0.9;
}

.product-visual-card h3 {
  font-size: 48px;
  font-weight: 800;
  margin-bottom: 12px;
}

.product-visual-card p {
  font-size: 16px;
  opacity: 0.85;
  line-height: 1.6;
}

/* ---- 更多产品 ---- */
.product-more {
  background: var(--bg);
}

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

.more-product-card {
  padding: 32px 24px;
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: var(--transition);
}

.more-product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
}

.mpc-icon {
  font-size: 36px;
  margin-bottom: 16px;
}

.more-product-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--bg-dark);
  margin-bottom: 10px;
}

.more-product-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
}

/* ---- 集成图 ---- */
.product-integration {
  background: var(--bg-light);
}

.integration-diagram {
  position: relative;
  width: 400px;
  height: 400px;
  margin: 0 auto;
}

.integration-center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 2;
}

.integration-core {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  box-shadow: 0 8px 30px rgba(13,71,161,0.3);
}

.integration-core i {
  font-size: 28px;
  margin-bottom: 4px;
}

.integration-core span {
  font-size: 20px;
}

.integration-ring {
  position: absolute;
  inset: 0;
}

.integration-node {
  position: absolute;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: #fff;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  box-shadow: var(--shadow-md);
  border: 2px solid var(--node-color);
  color: var(--node-color);
  /* Position around the circle */
  top: 50%;
  left: 50%;
  transform: rotate(var(--angle)) translateY(-150px) rotate(calc(-1 * var(--angle)));
  margin: -40px 0 0 -40px;
  transition: var(--transition);
}

.integration-node:hover {
  transform: rotate(var(--angle)) translateY(-160px) rotate(calc(-1 * var(--angle))) scale(1.1);
  box-shadow: var(--shadow-lg);
}

.integration-node i {
  font-size: 20px;
  margin-bottom: 2px;
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .product-nav-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .product-detail-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .product-detail-grid.reverse {
    direction: ltr;
  }
  
  .product-detail-visual {
    order: -1;
  }
  
  .product-visual-card {
    max-width: 100%;
  }
  
  .more-products-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .product-nav-grid {
    grid-template-columns: 1fr;
  }
  
  .product-detail-info h2 {
    font-size: 22px;
  }
  
  .product-features {
    grid-template-columns: 1fr;
  }
  
  .more-products-grid {
    grid-template-columns: 1fr;
  }
  
  .integration-diagram {
    width: 300px;
    height: 300px;
  }
  
  .integration-core {
    width: 90px;
    height: 90px;
  }
  
  .integration-core i {
    font-size: 22px;
  }
  
  .integration-core span {
    font-size: 16px;
  }
  
  .integration-node {
    width: 60px;
    height: 60px;
    font-size: 11px;
    transform: rotate(var(--angle)) translateY(-110px) rotate(calc(-1 * var(--angle)));
    margin: -30px 0 0 -30px;
  }
  
  .integration-node i {
    font-size: 16px;
  }
}