/* ========================================
   PC配件价格日报 - 全局样式
   Bootstrap 5 + 自定义增强
   ======================================== */

:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --info: #06b6d4;
  --dark: #1e293b;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-600: #475569;
  --gray-800: #1e293b;
  --card-shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --card-shadow-hover: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
}

body {
  background: var(--gray-50);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--gray-800);
}

/* Navbar */
.navbar-custom {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
.navbar-custom .navbar-brand {
  font-weight: 700;
  font-size: 1.25rem;
}
.navbar-custom .nav-link {
  color: rgba(255,255,255,0.85) !important;
  font-weight: 500;
  transition: color 0.2s;
}
.navbar-custom .nav-link:hover,
.navbar-custom .nav-link.active {
  color: #fff !important;
}

/* Hero Section */
.hero-section {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  padding: 2.5rem 0;
  margin-bottom: 2rem;
}
.hero-section h1 {
  font-weight: 800;
  font-size: 2rem;
  margin-bottom: 0.5rem;
}
.hero-section .update-time {
  opacity: 0.85;
  font-size: 0.9rem;
}

/* Price Cards */
.price-card {
  background: #fff;
  border-radius: 12px;
  border: none;
  box-shadow: var(--card-shadow);
  transition: transform 0.2s, box-shadow 0.2s;
  overflow: hidden;
}
.price-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--card-shadow-hover);
}
.price-card .card-header {
  background: transparent;
  border-bottom: 1px solid var(--gray-100);
  padding: 1rem 1.25rem;
  font-weight: 700;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.price-card .card-header i {
  font-size: 1.25rem;
  color: var(--primary);
}
.price-card .card-body {
  max-height: 560px;
  overflow-y: auto;
}
.price-card .card-body::-webkit-scrollbar {
  width: 5px;
}
.price-card .card-body::-webkit-scrollbar-track {
  background: transparent;
}
.price-card .card-body::-webkit-scrollbar-thumb {
  background: var(--gray-300);
  border-radius: 3px;
}
.price-card .price-item {
  padding: 0.875rem 1.25rem;
  border-bottom: 1px solid var(--gray-100);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background 0.15s;
}
.price-card .price-item:last-child {
  border-bottom: none;
}
.price-card .price-item:hover {
  background: var(--gray-50);
}
.price-card .item-label {
  font-weight: 600;
  color: var(--gray-800);
}
.price-card .item-platform {
  font-size: 0.75rem;
  color: var(--gray-600);
  margin-left: 0.5rem;
}
.price-card .item-price {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--danger);
}
.price-card .price-trend {
  font-size: 0.75rem;
  margin-left: 0.5rem;
  font-weight: 600;
}
.price-card .trend-up { color: var(--danger); }
.price-card .trend-down { color: var(--success); }
.price-card .trend-stable { color: var(--gray-600); }

/* Chart Section */
.chart-card {
  background: #fff;
  border-radius: 12px;
  border: none;
  box-shadow: var(--card-shadow);
  padding: 1.5rem;
}
.chart-card .chart-title {
  font-weight: 700;
  font-size: 1.15rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.chart-card .chart-container {
  position: relative;
  height: 320px;
}

/* Trend Controls */
.trend-controls {
  display: flex;
  justify-content: center;
}
.trend-range-btns {
  display: inline-flex;
  gap: 0.375rem;
  background: var(--gray-100);
  border-radius: 20px;
  padding: 0.25rem;
}
.btn-range {
  border: none;
  border-radius: 16px;
  padding: 0.3rem 1rem;
  font-size: 0.8rem;
  font-weight: 600;
  background: transparent;
  color: var(--gray-600);
  transition: all 0.2s;
}
.btn-range:hover {
  color: var(--primary);
}
.btn-range.active {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

/* Trend Category Tabs */
.trend-cat-tabs {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.btn-cat-tab {
  border: 1px solid var(--gray-200);
  border-radius: 20px;
  padding: 0.35rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  background: #fff;
  color: var(--gray-600);
  transition: all 0.2s;
}
.btn-cat-tab:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.btn-cat-tab.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* Trend Model Select */
.trend-model-select .form-select {
  max-width: 300px;
  border-radius: 8px;
  border: 1px solid var(--gray-200);
  font-size: 0.875rem;
  cursor: pointer;
}
.trend-model-select .form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Trend Stats */
.stat-box {
  background: var(--gray-50);
  border-radius: 10px;
  padding: 0.75rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  border: 1px solid var(--gray-100);
}
.stat-box.stat-high {
  border-left: 3px solid var(--danger);
}
.stat-box.stat-low {
  border-left: 3px solid var(--success);
}
.stat-label {
  font-size: 0.75rem;
  color: var(--gray-600);
  font-weight: 600;
}
.stat-value {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--gray-800);
}
.stat-high .stat-value { color: var(--danger); }
.stat-low .stat-value { color: var(--success); }
.stat-date {
  font-size: 0.75rem;
  color: var(--gray-600);
}

/* Hot Deals Scroll */
.hot-deals-section {
  margin: 2rem 0;
}
.hot-deals-section .section-title {
  font-weight: 800;
  font-size: 1.25rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.hot-deals-section .section-title i {
  color: var(--warning);
}
.deals-scroll {
  display: flex;
  gap: 1rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
  scroll-snap-type: x mandatory;
}
.deals-scroll::-webkit-scrollbar {
  height: 6px;
}
.deals-scroll::-webkit-scrollbar-track {
  background: var(--gray-200);
  border-radius: 3px;
}
.deals-scroll::-webkit-scrollbar-thumb {
  background: var(--gray-300);
  border-radius: 3px;
}
.deal-card {
  flex: 0 0 280px;
  scroll-snap-align: start;
  background: #fff;
  border-radius: 12px;
  box-shadow: var(--card-shadow);
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
}
.deal-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--card-shadow-hover);
}
.deal-card .deal-img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  background: var(--gray-100);
}
.deal-card .deal-body {
  padding: 1rem;
}
.deal-card .deal-name {
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1.4;
  margin-bottom: 0.5rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.deal-card .deal-price {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--danger);
}
.deal-card .deal-original {
  font-size: 0.85rem;
  color: var(--gray-300);
  text-decoration: line-through;
  margin-left: 0.5rem;
}
.deal-card .deal-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  margin-bottom: 0.5rem;
}
.deal-card .badge-hot { background: #fef3c7; color: #92400e; }
.deal-card .badge-sale { background: #fee2e2; color: #991b1b; }
.deal-card .badge-new { background: #dbeafe; color: #1e40af; }

/* CTA Button */
.btn-deals {
  background: linear-gradient(135deg, var(--danger) 0%, #dc2626 100%);
  color: white;
  border: none;
  border-radius: 50px;
  padding: 0.875rem 2rem;
  font-weight: 700;
  font-size: 1.1rem;
  box-shadow: 0 4px 6px rgba(239,68,68,0.3);
  transition: transform 0.2s, box-shadow 0.2s;
}
.btn-deals:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 12px rgba(239,68,68,0.4);
  color: white;
}
.btn-deals i {
  margin-right: 0.5rem;
}

/* Deals Page - Product Grid */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  padding: 1.5rem 0;
}
.product-card {
  background: #fff;
  border-radius: 12px;
  box-shadow: var(--card-shadow);
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
  display: flex;
  flex-direction: column;
}
.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--card-shadow-hover);
}
.product-card .product-img-wrap {
  position: relative;
  padding-top: 66.67%;
  overflow: hidden;
  background: var(--gray-100);
}
.product-card .product-img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s;
}
.product-card:hover .product-img {
  transform: scale(1.05);
}
.product-card .product-body {
  padding: 1.25rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.product-card .product-name {
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.5;
  margin-bottom: 0.5rem;
  flex: 1;
}
.product-card .product-desc {
  font-size: 0.85rem;
  color: var(--gray-600);
  line-height: 1.5;
  margin-bottom: 1rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.product-card .product-price-row {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.product-card .product-price {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--danger);
}
.product-card .product-original {
  font-size: 0.9rem;
  color: var(--gray-300);
  text-decoration: line-through;
}
.product-card .product-discount {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--danger);
  background: #fee2e2;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
}
.product-card .btn-buy {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  border: none;
  border-radius: 8px;
  padding: 0.625rem 1rem;
  font-weight: 700;
  transition: opacity 0.2s;
}
.product-card .btn-buy:hover {
  opacity: 0.9;
  color: white;
}

/* Search Box */
.search-box {
  position: relative;
  max-width: 400px;
}
.search-box i {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--gray-300);
  font-size: 1rem;
  z-index: 2;
}
.search-box input {
  padding-left: 2.5rem;
  border-radius: 50px;
  border: 1px solid var(--gray-200);
  background: #fff;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.search-box input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Filter Bar */
.filter-bar {
  background: #fff;
  border-radius: 12px;
  box-shadow: var(--card-shadow);
  padding: 1rem 1.5rem;
  margin-bottom: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}
.filter-bar .filter-label {
  font-weight: 700;
  color: var(--gray-600);
  margin-right: 0.5rem;
}
.filter-bar .btn-filter {
  border-radius: 20px;
  padding: 0.375rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  border: 1px solid var(--gray-200);
  background: #fff;
  color: var(--gray-600);
  transition: all 0.2s;
}
.filter-bar .btn-filter:hover,
.filter-bar .btn-filter.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* Footer */
.site-footer {
  background: var(--dark);
  color: var(--gray-300);
  padding: 2rem 0;
  margin-top: 3rem;
  text-align: center;
}
.site-footer a {
  color: var(--gray-300);
}

/* Responsive */
@media (max-width: 767px) {
  .hero-section {
    padding: 1.5rem 0;
  }
  .hero-section h1 {
    font-size: 1.5rem;
  }
  .price-card .price-item {
    padding: 0.75rem 1rem;
  }
  .chart-card {
    padding: 1rem;
  }
  .chart-card .chart-container {
    height: 250px;
  }
  .trend-cat-tabs {
    gap: 0.375rem;
  }
  .btn-cat-tab {
    padding: 0.3rem 0.75rem;
    font-size: 0.8rem;
  }
  .trend-model-select .form-select {
    max-width: 100%;
  }
  .stat-box {
    padding: 0.5rem 0.75rem;
  }
  .stat-value {
    font-size: 1.1rem;
  }
  .filter-bar {
    padding: 0.75rem 1rem;
  }
}

@media (min-width: 768px) and (max-width: 991px) {
  .product-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  }
}

/* Back Button */
.btn-back {
  background: var(--gray-100);
  color: var(--gray-800);
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  padding: 0.5rem 1.25rem;
  font-weight: 600;
  transition: all 0.2s;
}
.btn-back:hover {
  background: var(--gray-200);
  color: var(--gray-800);
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-fade-in {
  animation: fadeIn 0.4s ease-out;
}