/* ============================================================
   Shop Detail Page — 商品详情页
   结构：沉浸式详情页（固定Hero + ScrollView内容 + CTA）
   ============================================================ */

.shop-detail-page {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-page);
}

/* --- Fixed Hero Area --- */
.shop-hero-fixed {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 65vh;
  z-index: 0;
  overflow: hidden;
}

.shop-hero-clip {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  will-change: height, transform;
}

.shop-hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  will-change: top;
}

/* Bottom gradient mask: pseudo-mask approach (better x-compatibility) */
.shop-hero-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 55%;
  pointer-events: none;
}

/* Hero info (title, price) anchored at bottom */
.shop-hero-info {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 2;
  padding: 96rpx 40rpx calc(24rpx + env(safe-area-inset-bottom));
  display: flex;
  flex-direction: column;
  gap: 8rpx;
}

.shop-hero-title {
  font-size: 44rpx;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-primary);
}

.shop-hero-subtitle {
  font-size: 24rpx;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.shop-hero-price-row {
  display: flex;
  align-items: baseline;
  gap: 16rpx;
  margin-top: 6rpx;
}

.shop-hero-price {
  font-size: 44rpx;
  font-weight: 700;
  color: var(--accent-primary);
}

.shop-hero-original {
  font-size: 26rpx;
  color: var(--text-muted);
  text-decoration: line-through;
}

/* --- ScrollView Content Layer --- */
.shop-scroll {
  position: relative;
  z-index: 3;
}

.shop-content {
  min-height: 100vh;
  will-change: transform;
}

/* --- Transition Band (sticky-like top info) --- */
.shop-band {
  position: -webkit-sticky;
  position: sticky;
  top: 0;
  z-index: 4;
  padding: 24rpx 40rpx 24rpx;
  display: flex;
  flex-direction: column;
  gap: 10rpx;
  transition: opacity 0.15s ease;
  will-change: opacity;
}

.shop-band-title {
  font-size: 40rpx;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-primary);
}

.shop-band-subtitle {
  font-size: 24rpx;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.shop-band-price-row {
  display: flex;
  align-items: baseline;
  gap: 16rpx;
  margin-top: 6rpx;
}

.shop-band-price {
  font-size: 40rpx;
  font-weight: 700;
  color: var(--accent-primary);
}

.shop-band-original {
  font-size: 26rpx;
  color: var(--text-muted);
  text-decoration: line-through;
}

/* --- Detail Body --- */
.shop-detail-body {
  padding: 0 32rpx calc(48rpx + env(safe-area-inset-bottom));
  will-change: opacity, transform;
  box-sizing: border-box;
}

.shop-content-card {
  padding: 32rpx;
  background: var(--bg-card);
  border: 1rpx solid var(--border);
  border-radius: 32rpx;
  box-shadow: var(--shadow-card);
  box-sizing: border-box;
}

.shop-section {
  margin-bottom: 32rpx;
}

.shop-section:last-child {
  margin-bottom: 0;
}

.shop-section-title {
  font-size: 34rpx;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 20rpx;
  display: block;
  position: relative;
  padding-left: 20rpx;
  letter-spacing: 0;
}

.shop-section-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8rpx;
  bottom: 8rpx;
  width: 6rpx;
  border-radius: 999rpx;
  background: var(--accent-primary);
}

.shop-section-text {
  font-size: 28rpx;
  color: var(--text-secondary);
  line-height: 1.8;
  display: block;
}

.shop-divider {
  height: 1rpx;
  background: var(--border);
  margin: 32rpx 0;
}

/* --- Tags --- */
.shop-tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16rpx;
  margin: 20rpx 0;
}

.shop-tag {
  height: 56rpx;
  padding: 0 28rpx;
  border-radius: 999rpx;
  font-size: 22rpx;
  font-weight: 600;
  background: var(--accent-primary-soft);
  border: 1rpx solid var(--accent-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.shop-tag-text {
  color: var(--accent-primary);
}

/* --- Spec Table --- */
.shop-spec-table {
  width: 100%;
  border: 1rpx solid var(--border);
  border-radius: 20rpx;
  overflow: hidden;
  background: var(--bg-muted);
}

.shop-spec-row {
  display: flex;
  padding: 24rpx 28rpx;
  border-bottom: 1rpx solid var(--border);
}

.shop-spec-row:last-child {
  border-bottom: none;
}

.shop-spec-key {
  width: 35%;
  color: var(--text-muted);
  font-weight: 500;
  font-size: 24rpx;
}

.shop-spec-val {
  flex: 1;
  color: var(--text-primary);
  font-size: 26rpx;
  font-weight: 500;
  word-break: break-all;
}

.shop-bottom-spacer {
  height: 200rpx;
}

/* --- Back Button --- */
.shop-back-btn {
  position: fixed;
  top: calc(env(safe-area-inset-top, 20px) + 20rpx);
  left: 24rpx;
  z-index: 50;
  width: 88rpx;
  height: 88rpx;
  border-radius: 50%;
  background: rgba(40, 35, 32, 0.5);
  backdrop-filter: blur(16px) saturate(1.4);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  border: 1rpx solid var(--glass-line);
  box-shadow: var(--shadow-elevated);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.2s ease, transform 0.15s ease;
}

.shop-back-btn:active {
  transform: scale(0.92);
}

.shop-back-arrow {
  font-size: 36rpx;
  color: var(--text-primary);
  line-height: 1;
}

/* --- Bottom Action Bar — 毛玻璃由 BottomActionBar 提供，本地只补充价格摘要 --- */
.bottom-action-bar .price-summary {
  flex-shrink: 0;
}

.bottom-action-bar .btn-primary,
.bottom-action-bar .btn-secondary {
  flex: 1;
  text-align: center;
  padding: 28rpx 0;
  font-size: 28rpx;
  font-weight: 600;
  line-height: 1.2;
}

.summary-label {
  font-size: 22rpx;
  color: var(--text-secondary);
  display: block;
}

.summary-price {
  font-size: 40rpx;
  font-weight: 700;
  color: var(--accent-primary);
}

.summary-original {
  font-size: 24rpx;
  color: var(--text-muted);
  text-decoration: line-through;
}