/* ============================================================
   产品详情页样式（product.html）
   ============================================================ */

/* ---------- 面包屑 ---------- */
.breadcrumb {
  background: var(--c-bg-soft);
  border-bottom: 1px solid var(--c-border);
  padding: 16px 0;
}
.breadcrumb .container {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--c-text-sub);
}
.breadcrumb a { color: var(--c-text-sub); }
.breadcrumb a:hover { color: var(--c-primary-light); }
.bc-sep { color: var(--c-border); }
.bc-current { color: var(--c-primary); font-weight: 500; }

/* ---------- 产品概览 ---------- */
.pd-hero { padding: 56px 0 48px; }
.pd-overview {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 60px;
  align-items: center;
}
.pd-gallery { }
.pd-main-img {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--c-border);
  background: var(--c-bg-soft);
  box-shadow: var(--shadow-sm);
}
.pd-main-img img {
  width: 100%;
  aspect-ratio: 4/3.2;
  object-fit: cover;
  display: block;
}
.pd-tag {
  position: absolute;
  top: 16px; left: 16px;
  padding: 5px 14px;
  background: var(--c-primary);
  color: var(--c-white);
  font-size: 13px;
  border-radius: 4px;
  font-weight: 500;
  z-index: 2;
}
.pd-tag.green { background: var(--c-accent); }

/* ---------- 产品信息 ---------- */
.pd-subname {
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2.5px;
  color: var(--c-primary-light);
  text-transform: uppercase;
}
.pd-title {
  font-size: 32px;
  font-weight: 600;
  color: var(--c-primary);
  margin: 12px 0 16px;
  line-height: 1.3;
}
.pd-desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-text-sub);
  padding-bottom: 26px;
  border-bottom: 1px solid var(--c-border);
  margin-bottom: 26px;
}

.pd-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.btn-ghost-dark {
  background: var(--c-blue-light);
  color: var(--c-primary);
  border: 1.5px solid transparent;
}
.btn-ghost-dark:hover {
  background: var(--c-white);
  border-color: var(--c-primary);
  transform: translateY(-2px);
}

/* ---------- 详情主体 ---------- */
.pd-body {
  background: var(--c-bg-soft);
  padding: 64px 0 72px;
}
.pd-body-grid { margin-top: 12px; }

/* 内容区 */
.pd-content {
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 44px 48px;
}
.pd-content-full { max-width: 100%; }
.pd-section-block { margin-bottom: 40px; scroll-margin-top: calc(var(--header-h) + 20px); }
.pd-section-block:last-child { margin-bottom: 0; }
.pd-h2 {
  font-size: 22px;
  color: var(--c-primary);
  margin-bottom: 14px;
}
.pd-h2-bar {
  display: flex;
  gap: 4px;
  margin-bottom: 20px;
}
.pd-h2-bar span:first-child { width: 30px; height: 3px; background: var(--c-primary-light); border-radius: 2px; }
.pd-h2-bar span:last-child { width: 10px; height: 3px; background: var(--c-accent); border-radius: 2px; }
.pd-para {
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--c-text-sub);
  margin-bottom: 14px;
}

/* 技术参数表 */
.pd-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
}
.pd-table { width: 100%; border-collapse: collapse; }
.pd-table tr:nth-child(odd) { background: var(--c-bg-soft); }
.pd-table tr:nth-child(even) { background: var(--c-white); }
.pd-table th {
  background: var(--c-primary);
  color: var(--c-white);
  text-align: left;
  padding: 12px 18px;
  font-size: 13.5px;
  font-weight: 500;
}
.pd-table td {
  padding: 12px 18px;
  font-size: 13.5px;
  color: var(--c-text);
  border-bottom: 1px solid var(--c-border);
}
.pd-table td:first-child {
  font-weight: 600;
  color: var(--c-primary);
  white-space: nowrap;
  width: 180px;
}

/* 产品特点 */
.pd-feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.pd-feature {
  display: flex;
  gap: 14px;
  padding: 20px;
  background: var(--c-bg-soft);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  transition: var(--transition);
}
.pd-feature:hover { border-color: var(--c-primary-light); box-shadow: var(--shadow-sm); transform: translateY(-2px); }
.pd-feature-icon {
  flex-shrink: 0;
  width: 42px; height: 42px;
  border-radius: 10px;
  background: var(--c-blue-light);
  color: var(--c-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}
.pd-feature strong { display: block; font-size: 15px; color: var(--c-text); margin-bottom: 4px; }
.pd-feature p { font-size: 13px; color: var(--c-text-sub); line-height: 1.6; }

/* 工艺流程 */
.pd-flow {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.pd-flow-step {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  position: relative;
  padding-bottom: 22px;
}
.pd-flow-step::before {
  content: '';
  position: absolute;
  left: 17px; top: 40px; bottom: 0;
  width: 2px;
  background: var(--c-border);
}
.pd-flow-step:last-child::before { display: none; }
.pd-flow-dot {
  flex-shrink: 0;
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--c-primary);
  color: var(--c-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
  font-family: "DIN Alternate", "Helvetica Neue", Arial, sans-serif;
}
.pd-flow-step:nth-child(even) .pd-flow-dot { background: var(--c-accent); }
.pd-flow-body strong { display: block; font-size: 15px; color: var(--c-text); margin: 8px 0 2px; }
.pd-flow-body p { font-size: 13px; color: var(--c-text-sub); }

/* 应用场景 */
.pd-scene-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.pd-scene-list li {
  padding: 13px 16px;
  background: var(--c-bg-soft);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--c-text);
  display: flex;
  align-items: center;
  gap: 10px;
}
.pd-scene-list li::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--c-accent);
  flex-shrink: 0;
}

/* 订购流程 */
.pd-order-steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.pd-order-steps li {
  background: var(--c-bg-soft);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 24px 20px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.pd-order-num {
  font-family: "DIN Alternate", "Helvetica Neue", Arial, sans-serif;
  font-size: 30px;
  font-weight: 700;
  color: var(--c-primary-light);
  line-height: 1;
  flex-shrink: 0;
}
.pd-order-steps strong { display: block; font-size: 15px; color: var(--c-text); margin-bottom: 4px; }
.pd-order-steps p { font-size: 13px; color: var(--c-text-sub); line-height: 1.6; }

/* ---------- 相关产品 ---------- */
.pd-related { padding: 72px 0; }
.pd-related-grid { grid-template-columns: repeat(3, 1fr); }
.product-card {
  background: var(--c-white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  border: 1px solid var(--c-border);
}
.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--c-blue-light);
}
.product-img {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
  background: var(--c-bg-soft);
}
.product-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.product-card:hover .product-img img { transform: scale(1.05); }
.product-tag {
  position: absolute;
  top: 14px; left: 14px;
  padding: 4px 12px;
  background: var(--c-primary);
  color: var(--c-white);
  font-size: 12px;
  border-radius: 4px;
  font-weight: 500;
}
.product-tag.green { background: var(--c-accent); }
.product-body { padding: 22px; flex: 1; display: flex; flex-direction: column; }
.product-body h3 { font-size: 18px; color: var(--c-text); margin-bottom: 10px; font-weight: 600; }
.product-body p { font-size: 14px; color: var(--c-text-sub); line-height: 1.7; margin-bottom: 18px; flex: 1; }
.product-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid var(--c-border);
}
.product-meta span { font-size: 13px; color: var(--c-primary); font-weight: 500; font-family: "DIN Alternate", "Helvetica Neue", Arial, sans-serif; }
.product-link { font-size: 13px; color: var(--c-accent); font-weight: 500; }
.product-link:hover { color: var(--c-primary-light); }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .pd-overview { grid-template-columns: 1fr 1fr; gap: 32px; }
  .pd-title { font-size: 26px; }
  .pd-content { padding: 32px 28px; }
  .pd-related-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .pd-hero { padding: 40px 0 36px; }
  .pd-overview { grid-template-columns: 1fr; gap: 24px; }
  .pd-body { padding: 44px 0; }
  .pd-content { padding: 24px 20px; }
  .pd-feature-grid { grid-template-columns: 1fr; }
  .pd-scene-list { grid-template-columns: 1fr; }
  .pd-order-steps { grid-template-columns: 1fr; }
  .pd-related-grid { grid-template-columns: 1fr; }
  .pd-actions { flex-direction: column; }
  .pd-actions .btn { width: 100%; }
}