/* ============================================================
   信宇门窗 - 产品详情页专用样式
   适用: products/product-detail.html
   说明: 继承 css/styles.css 全局样式，本文件仅放产品详情页特有样式
   ============================================================ */

/* ============================================================
   产品详情主体
   ============================================================ */
.product-detail {
  padding: 40px 0;
}

/* 宽幅效果 Banner（对齐案例详情页 .case-hero-img 样式） */
.product-detail .case-hero-img {
  width: 100%;
  max-height: 500px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  margin-bottom: 40px;
  box-shadow: var(--shadow-md);
}

@media (max-width: 576px) {
  .product-detail .case-hero-img {
    border-radius: 6px;
  }
}

/* ============================================================
   产品概览区（左图右文）
   ============================================================ */
.product-overview {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
  margin-bottom: 80px;
}

.product-gallery {
  position: sticky;
  top: 100px;
}

.product-gallery .main-img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  border-radius: var(--radius-lg);
  margin-bottom: 16px;
}

.product-info h1 {
  font-size: 32px;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 12px;
  letter-spacing: 2px;
}

.product-info .subtitle {
  font-size: 16px;
  color: var(--text-muted);
  margin-bottom: 24px;
  line-height: 1.7;
}

/* 系列标签 */
.pd-series-tag {
  display: inline-block;
  background: linear-gradient(135deg, var(--primary), #e85d1a);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 20px;
  letter-spacing: 2px;
  margin-bottom: 12px;
}

/* 适用场景标签 */
.pd-scene-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 24px 0 32px;
}

.scene-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: 30px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-body);
  transition: var(--transition);
}

.scene-tag:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(236, 84, 18, 0.04);
}

.scene-tag svg { flex-shrink: 0; }

/* ============================================================
   产品分区标题（统一）
   ============================================================ */
.pd-section {
  margin-bottom: 64px;
}

.pd-section-title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 26px;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 32px;
  letter-spacing: 2px;
}

.title-bar {
  width: 5px;
  height: 28px;
  background: var(--primary);
  border-radius: 3px;
}

.pd-sub-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-dark);
  margin: 28px 0 12px;
  padding-left: 17px;
  border-left: 3px solid var(--border);
}

.pd-aux-text {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.8;
}

.pd-case-intro {
  font-size: 15px;
  color: var(--text-muted);
  margin-bottom: 24px;
  line-height: 1.7;
}

/* ============================================================
   产品配置网格（对标产品图右侧表格）
   ============================================================ */
.pd-config-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
}

.config-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  transition: background 0.2s;
}

.config-item:nth-child(odd) { background: #fafafa; }
.config-item:nth-child(even) { background: var(--white); }

.config-item:hover {
  background: rgba(236, 84, 18, 0.03);
}

.config-label {
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 500;
  white-space: nowrap;
}

.config-value {
  font-size: 15px;
  color: var(--text-dark);
  font-weight: 600;
  text-align: right;
}

.config-value.highlight { color: var(--primary); }

/* ============================================================
   性能指标卡片（对标图片底部5图标）
   ============================================================ */
.pd-performance {
  background: linear-gradient(135deg, #fff9f5 0%, #fff 100%);
  padding: 48px 40px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(236, 84, 18, 0.1);
}

.perf-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
}

.perf-card {
  text-align: center;
  padding: 24px 16px;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s, box-shadow 0.3s;
}

.perf-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.perf-icon {
  margin-bottom: 12px;
  display: flex;
  justify-content: center;
}

.perf-label {
  display: block;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.perf-grade {
  display: block;
  font-size: 20px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.3;
}

.perf-grade small {
  font-size: 13px;
  font-weight: 600;
  opacity: 0.75;
}

/* ============================================================
   产品特点卡片
   ============================================================ */
.feature-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
}

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

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

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

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

/* ============================================================
   窗型优势（深色背景区）
   ============================================================ */
.pd-type-advantage {
  background: var(--dark);
  padding: 56px 48px;
  border-radius: var(--radius-lg);
}

.pd-type-advantage .pd-section-title { color: #fff; }
.pd-type-advantage .title-bar { background: var(--primary); }

.advantage-list {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.adv-item {
  display: flex;
  gap: 24px;
  align-items: flex-start;
}

.adv-num {
  font-size: 42px;
  font-weight: 900;
  color: var(--primary);
  line-height: 1;
  min-width: 60px;
  opacity: 0.8;
}

.adv-content h4 {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

.adv-content p {
  font-size: 15px;
  color: rgba(255,255,255,0.65);
  line-height: 1.7;
}

/* ============================================================
   相关案例卡片（参考案例页 case-detail 风格）
   ============================================================ */
.case-preview-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.case-preview-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s;
  text-decoration: none;
  color: inherit;
  display: block;
}

.case-preview-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.cpc-img {
  aspect-ratio: 16/10;
  overflow: hidden;
  position: relative;
}

.cpc-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s;
}

.case-preview-card:hover .cpc-img img {
  transform: scale(1.05);
}

.cpc-body {
  padding: 20px;
}

.cpc-body h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 6px;
}

.cpc-body p {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 12px;
  line-height: 1.6;
}

.cpc-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
}

/* ============================================================
   响应式 - 平板端 (≤992px)
   ============================================================ */
@media (max-width: 992px) {
  .product-overview {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .product-gallery {
    position: static;
  }

  .pd-config-grid {
    grid-template-columns: 1fr;
  }

  .perf-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .feature-cards {
    grid-template-columns: repeat(2, 1fr);
  }

  .case-preview-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .pd-type-advantage {
    padding: 40px 28px;
  }
}

/* ============================================================
   响应式 - 手机端 (≤576px)
   ============================================================ */
@media (max-width: 576px) {
  .product-detail {
    padding: 40px 0;
  }

  .product-overview {
    gap: 28px;
    margin-bottom: 48px;
  }

  .pd-series-tag {
    font-size: 11px;
    padding: 3px 10px;
  }

  .product-info h1 {
    font-size: 26px;
  }

  .pd-scene-tags { gap: 8px; }

  .scene-tag {
    font-size: 13px;
    padding: 6px 14px;
  }

  .pd-section {
    margin-bottom: 40px;
  }

  .pd-section-title {
    font-size: 22px;
    margin-bottom: 20px;
  }

  .title-bar {
    height: 22px;
  }

  .perf-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
  }

  .perf-card { padding: 16px 8px; }
  .perf-grade { font-size: 16px; }

  .feature-cards {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .feature-card { padding: 24px 18px; }

  .case-preview-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .cpc-body { padding: 16px; }
  .cpc-body h4 { font-size: 15px; }

  .pd-type-advantage {
    padding: 32px 20px;
  }

  .adv-num {
    font-size: 32px;
    min-width: 46px;
  }

  .pd-performance {
    padding: 28px 16px;
  }

  .pd-config-grid {
    border-radius: var(--radius);
  }

  .config-item {
    padding: 12px 16px;
  }

  .config-label { font-size: 13px; }
  .config-value { font-size: 14px; }
}