/* ==================== 产品详情页样式 ==================== */

/* Hero 区 */
.pd-hero {
  margin-top: var(--nav-height);
  background: var(--bg-card);
  padding: 80px 24px 60px;
  text-align: center;
}
.pd-hero-inner {
  max-width: 1000px; margin: 0 auto;
}
.pd-category {
  display: inline-block; font-size: 11px; font-weight: 600;
  color: var(--color-accent); text-transform: uppercase;
  letter-spacing: 3px; margin-bottom: 16px;
}
.pd-name {
  font-size: 48px; font-weight: 700; color: var(--text-primary);
  line-height: 1.12; margin-bottom: 14px; letter-spacing: -0.5px;
}
.pd-tagline {
  font-size: 20px; color: var(--text-secondary); margin-bottom: 20px;
  letter-spacing: 0.3px;
}
.pd-buy-group {
  display: flex; gap: 16px; justify-content: center; margin-bottom: 48px;
}
.pd-buy-btn {
  display: inline-block; padding: 14px 36px;
  border-radius: 28px; font-size: 15px; font-weight: 500;
  transition: all var(--transition-smooth);
}
.pd-buy-tmall { background: var(--color-primary); color: var(--text-inverse); }
.pd-buy-tmall:hover { opacity: 0.85; transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.pd-buy-jd { border: 1.5px solid var(--border-color); color: var(--text-primary); }
.pd-buy-jd:hover { background: var(--color-primary); color: var(--text-inverse); border-color: var(--color-primary); }
.pd-hero-img {
  max-width: 600px; margin: 0 auto;
}
.pd-hero-img img {
  width: 100%; object-fit: contain; max-height: 400px;
  filter: drop-shadow(0 4px 20px rgba(0, 0, 0, 0.1));
}

/* 特性区块 */
.pd-feature {
  padding: 90px 24px;
  overflow: hidden;
}
.pd-feature:nth-child(even) { background: var(--bg-card); }
.pd-feature:nth-child(odd) { background: var(--bg-page); }
.pd-feature-inner {
  max-width: 1100px; margin: 0 auto;
  display: flex; align-items: center; gap: 72px;
}
.pd-feature-inner.layout-left { flex-direction: row-reverse; }
.pd-feature-text { flex: 1; }
.pd-feature-subtitle {
  font-size: 12px; font-weight: 600; color: var(--color-accent);
  text-transform: uppercase; letter-spacing: 2px; margin-bottom: 10px;
}
.pd-feature-title {
  font-size: 34px; font-weight: 700; color: var(--text-primary);
  line-height: 1.2; margin-bottom: 18px; letter-spacing: -0.3px;
}
.pd-feature-desc {
  font-size: 16px; color: var(--text-secondary); line-height: 1.9;
}
.pd-feature-img {
  flex: 1; display: flex; justify-content: center; align-items: center;
}
.pd-feature-img img {
  max-width: 100%; max-height: 360px; object-fit: contain;
  transition: transform var(--transition-smooth);
}
.pd-feature:hover .pd-feature-img img {
  transform: scale(1.03);
}

/* 规格参数 */
.pd-specs {
  padding: 90px 24px; background: var(--bg-card);
}
.pd-specs-inner {
  max-width: 800px; margin: 0 auto;
}
.pd-specs-title {
  font-size: 30px; font-weight: 700; color: var(--text-primary);
  text-align: center; margin-bottom: 48px; letter-spacing: -0.3px;
}
.pd-specs-table {
  width: 100%; border-collapse: collapse;
}
.pd-specs-table tr {
  border-bottom: 1px solid var(--border-light);
}
.pd-specs-table td {
  padding: 18px 0; font-size: 15px; vertical-align: top;
}
.pd-specs-table td:first-child {
  color: var(--text-secondary); width: 160px; font-weight: 500;
  letter-spacing: 0.3px;
}
.pd-specs-table td:last-child {
  color: var(--text-primary);
}

/* 返回按钮 */
.pd-back {
  display: flex; justify-content: center; padding: 56px 24px;
}
.pd-back-btn {
  display: inline-block; padding: 12px 32px;
  border: 1.5px solid var(--border-color); border-radius: 28px;
  font-size: 15px; color: var(--text-primary); font-weight: 500;
  transition: all var(--transition-smooth);
}
.pd-back-btn:hover {
  background: var(--color-primary); color: var(--text-inverse);
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

/* 响应式 */
@media (max-width: 768px) {
  .pd-hero { padding: 60px 20px 40px; }
  .pd-name { font-size: 32px; }
  .pd-tagline { font-size: 16px; }
  .pd-hero-img img { max-height: 260px; }
  .pd-feature { padding: 56px 20px; }
  .pd-feature-inner,
  .pd-feature-inner.layout-left {
    flex-direction: column; gap: 36px; text-align: center;
  }
  .pd-feature-title { font-size: 26px; }
  .pd-feature-img img { max-height: 240px; }
  .pd-specs { padding: 56px 20px; }
  .pd-specs-title { font-size: 24px; }
  .pd-specs-table td { font-size: 14px; padding: 14px 0; }
  .pd-specs-table td:first-child { width: 110px; }
}