/* ============================================
       Products Page Specific Styles
       高对比工业风 - 深蓝 + 琥珀橙 + 钢铁灰
       ============================================ */

    /* ---- Buttons ---- */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: var(--space-2);
      padding: 0 var(--space-5);
      height: 44px;
      font-size: var(--text-sm);
      font-weight: 600;
      border-radius: var(--radius-sm);
      border: 1px solid transparent;
      transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
      white-space: nowrap;
      cursor: pointer;
    }

    .btn-primary {
      background: var(--jc-amber-500);
      color: #FFFFFF;
      border-color: var(--jc-amber-500);
    }

    .btn-primary:hover {
      background: var(--jc-amber-600);
      border-color: var(--jc-amber-600);
    }

    .btn-primary::after {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(120deg, transparent 30%, rgba(255,255,255,0.15) 50%, transparent 70%);
        transform: translateX(-100%);
        transition: transform 0.6s ease;
        pointer-events: none;
    }

    .btn-primary:hover::after {
        transform: translateX(100%);
    }

    .btn-primary:active {
      background: var(--jc-amber-700);
      border-color: var(--jc-amber-700);
    }

    .btn-blue {
      background: var(--jc-blue-600);
      color: #FFFFFF;
      border-color: var(--jc-blue-600);
    }

    .btn-blue:hover {
      background: var(--jc-blue-700);
      border-color: var(--jc-blue-700);
    }

    .btn-sm {
      height: 36px;
      padding: 0 var(--space-4);
      font-size: var(--text-xs);
    }

    /* ============================================
       2. Page Header
       ============================================ */
    .page-header {
      background: linear-gradient(135deg, var(--jc-blue-600) 0%, var(--jc-blue-900) 100%);
      padding: calc(72px + var(--space-8)) 0 var(--space-8);
      position: relative;
      overflow: hidden;
    }

    .page-header::before {
      content: '';
      position: absolute;
      top: 0;
      right: 0;
      width: 600px;
      height: 600px;
      background: radial-gradient(circle, rgba(245, 124, 0, 0.08) 0%, transparent 70%);
      transform: translate(30%, -30%);
      pointer-events: none;
    }

    .page-header::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    }

    .breadcrumb {
      display: flex;
      align-items: center;
      gap: var(--space-2);
      font-size: var(--text-sm);
      color: var(--jc-blue-200);
      margin-bottom: var(--space-5);
      position: relative;
      z-index: 1;
    }

    .breadcrumb a {
      color: var(--jc-blue-200);
      transition: color 0.2s ease;
    }

    .breadcrumb a:hover {
      color: #FFFFFF;
    }

    .breadcrumb .separator {
      color: var(--jc-blue-300);
      font-size: var(--text-xs);
    }

    .breadcrumb .current {
      color: #FFFFFF;
      font-weight: 500;
    }

    .subtag-pill {
      padding: 6px 16px;
      font-size: var(--text-sm);
      font-weight: 500;
      color: var(--jc-gray-700);
      background: var(--jc-gray-100);
      border: 1px solid var(--jc-gray-200);
      border-radius: var(--radius-full);
      cursor: pointer;
      transition: all 0.2s ease;
    }

    .subtag-pill:hover {
      border-color: var(--jc-blue-300);
      color: var(--jc-blue-600);
    }

    .subtag-pill.active {
      background: var(--jc-blue-600);
      border-color: var(--jc-blue-600);
      color: #FFFFFF;
    }

    /* ============================================
       4. Product Card Grid
       ============================================ */
    .products-section {
      background: #FFFFFF;
      padding: var(--space-8) 0;
    }

    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: var(--space-5);
    }

    .product-card {
      background: #FFFFFF;
      border: 1px solid var(--jc-gray-200);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
    }

    .product-card:hover {
      border-color: var(--jc-blue-400);
      box-shadow: 0 8px 24px rgba(10, 74, 143, 0.12);
      transform: translateY(-2px);
    }

    .product-card-image {
      position: relative;
      height: 200px;
      overflow: hidden;
      background: var(--jc-gray-100);
    }

    .product-card-image img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

    .product-card:hover .product-card-image img {
      transform: scale(1.05);
    }

    .product-card-badge {
      position: absolute;
      top: var(--space-3);
      left: var(--space-3);
      padding: 4px 10px;
      font-size: var(--text-xs);
      font-weight: 600;
      background: var(--jc-blue-600);
      color: #FFFFFF;
      border-radius: var(--radius-sm);
      letter-spacing: 0.02em;
    }

    .product-card-body {
      padding: var(--space-5);
      flex: 1;
      display: flex;
      flex-direction: column;
    }

    .product-material-tag {
      display: inline-block;
      padding: 3px 10px;
      font-size: var(--text-xs);
      font-weight: 600;
      color: var(--jc-blue-700);
      background: var(--jc-blue-50);
      border-radius: var(--radius-sm);
      margin-bottom: var(--space-3);
      align-self: flex-start;
    }

    .product-card-title {
      font-size: var(--text-xl);
      font-weight: 700;
      color: var(--jc-gray-900);
      margin-bottom: var(--space-2);
      line-height: 1.3;
    }

    .product-card-desc {
      font-size: var(--text-sm);
      color: var(--jc-gray-600);
      line-height: var(--leading-relaxed);
      margin-bottom: var(--space-4);
    }

    .product-specs {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: var(--space-2);
      margin-bottom: var(--space-5);
    }

    .product-specs li {
      display: flex;
      align-items: center;
      gap: var(--space-2);
      font-size: var(--text-sm);
      color: var(--jc-gray-700);
    }

    .product-specs .spec-icon {
      width: 16px;
      height: 16px;
      color: var(--jc-blue-500);
      flex-shrink: 0;
    }

    .product-specs .spec-label {
      color: var(--jc-gray-500);
      flex-shrink: 0;
    }

    .product-specs .spec-value {
      font-weight: 600;
      color: var(--jc-gray-800);
    }

    .product-detail-link {
      font-size: var(--text-sm);
      font-weight: 600;
      color: var(--jc-blue-600);
      display: inline-flex;
      align-items: center;
      gap: 4px;
      transition: color 0.2s ease, gap 0.2s ease;
    }

    .product-detail-link:hover {
      color: var(--jc-blue-700);
      gap: 8px;
    }

    .product-detail-link svg {
      width: 14px;
      height: 14px;
    }

    /* ============================================
       5. Material Performance Comparison Table
       ============================================ */
    .compare-section {
      background: var(--jc-gray-50);
      padding: var(--space-8) 0;
    }

    .section-header {
      text-align: center;
      margin-bottom: var(--space-7);
    }

    .section-title {
      font-size: var(--text-3xl);
      font-weight: 700;
      color: var(--jc-gray-900);
      margin-bottom: var(--space-3);
      letter-spacing: -0.01em;
    }

    .section-subtitle {
      font-size: var(--text-base);
      color: var(--jc-gray-600);
    }

    .compare-table-wrapper {
      background: #FFFFFF;
      border: 1px solid var(--jc-gray-200);
      border-radius: var(--radius-md);
      overflow: hidden;
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      font-size: var(--text-sm);
    }

    .compare-table thead {
      background: var(--jc-gray-900);
    }

    .compare-table th {
      padding: var(--space-4) var(--space-4);
      text-align: left;
      font-weight: 600;
      color: #FFFFFF;
      font-size: var(--text-sm);
      border-bottom: 2px solid var(--jc-amber-500);
      white-space: nowrap;
    }

    .compare-table tbody tr {
      border-bottom: 1px solid var(--jc-gray-100);
      transition: background-color 0.15s ease;
    }

    .compare-table tbody tr:last-child {
      border-bottom: none;
    }

    .compare-table tbody tr:hover {
      background: var(--jc-blue-50);
    }

    .compare-table td {
      padding: var(--space-4);
      color: var(--jc-gray-700);
      vertical-align: middle;
    }

    .compare-table .material-name {
      font-weight: 700;
      font-size: var(--text-base);
      color: var(--jc-blue-600);
    }

    .compare-table .temp-value {
      font-family: var(--font-mono);
      font-weight: 600;
      color: var(--jc-gray-900);
    }

    .rating-bar {
      display: flex;
      align-items: center;
      gap: var(--space-2);
    }

    .rating-track {
      width: 80px;
      height: 6px;
      background: var(--jc-gray-200);
      border-radius: var(--radius-full);
      overflow: hidden;
    }

    .rating-fill {
      height: 100%;
      background: linear-gradient(90deg, var(--jc-blue-500), var(--jc-blue-600));
      border-radius: var(--radius-full);
    }

    .rating-fill.amber {
      background: linear-gradient(90deg, var(--jc-amber-400), var(--jc-amber-500));
    }

    .rating-text {
      font-size: var(--text-xs);
      color: var(--jc-gray-600);
      font-weight: 500;
      min-width: 32px;
    }

    .stars {
      display: inline-flex;
      gap: 2px;
    }

    .star {
      width: 14px;
      height: 14px;
      color: var(--jc-amber-400);
    }

    .star.empty {
      color: var(--jc-gray-200);
    }

    .app-tag {
      display: inline-block;
      padding: 3px 8px;
      font-size: var(--text-xs);
      background: var(--jc-gray-100);
      color: var(--jc-gray-700);
      border-radius: var(--radius-sm);
      margin-right: 4px;
      margin-bottom: 2px;
    }

    /* ============================================
       6. Selection Guide
       ============================================ */
    .selection-section {
      background: #FFFFFF;
      padding: var(--space-8) 0;
    }

    .selection-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: var(--space-6);
      margin-top: var(--space-7);
    }

    .selection-card {
      background: #FFFFFF;
      border: 1px solid var(--jc-gray-200);
      border-radius: var(--radius-md);
      padding: var(--space-6);
    }

    .selection-card-title {
      font-size: var(--text-xl);
      font-weight: 700;
      color: var(--jc-gray-900);
      margin-bottom: var(--space-5);
      display: flex;
      align-items: center;
      gap: var(--space-3);
    }

    .selection-card-title .icon-box {
      width: 40px;
      height: 40px;
      background: var(--jc-blue-50);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--jc-blue-600);
    }

    .selection-card-title .icon-box svg {
      width: 20px;
      height: 20px;
    }

    /* Decision Tree */
    .decision-steps {
      position: relative;
      padding-left: var(--space-2);
    }

    .decision-step {
      display: flex;
      gap: var(--space-4);
      margin-bottom: var(--space-5);
      position: relative;
    }

    .decision-step:last-child {
      margin-bottom: 0;
    }

    .step-number {
      width: 36px;
      height: 36px;
      background: var(--jc-blue-600);
      color: #FFFFFF;
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: var(--text-base);
      flex-shrink: 0;
      font-family: var(--font-mono);
    }

    .step-content {
      flex: 1;
      padding-top: 4px;
    }

    .step-title {
      font-size: var(--text-base);
      font-weight: 600;
      color: var(--jc-gray-900);
      margin-bottom: var(--space-1);
    }

    .step-desc {
      font-size: var(--text-sm);
      color: var(--jc-gray-600);
      line-height: var(--leading-relaxed);
    }

    .step-arrow {
      position: absolute;
      left: 17px;
      top: 36px;
      width: 2px;
      height: calc(100% - 24px);
      background: var(--jc-gray-200);
    }

    .decision-step:last-child .step-arrow {
      display: none;
    }

    /* Selection Form */
    .selection-form {
      display: flex;
      flex-direction: column;
      gap: var(--space-4);
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: var(--space-2);
    }

    .form-label {
      font-size: var(--text-sm);
      font-weight: 600;
      color: var(--jc-gray-800);
    }

    .form-select,
    .form-input {
      height: 44px;
      padding: 0 var(--space-4);
      font-size: var(--text-sm);
      font-family: inherit;
      color: var(--jc-gray-900);
      background: #FFFFFF;
      border: 1px solid var(--jc-gray-300);
      border-radius: var(--radius-sm);
      transition: border-color 0.2s ease;
      appearance: none;
      cursor: pointer;
    }

    .form-select:focus,
    .form-input:focus {
      outline: none;
      border-color: var(--jc-blue-500);
      box-shadow: 0 0 0 3px rgba(10, 74, 143, 0.1);
    }

    .form-select {
      background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%235C6575' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
      background-repeat: no-repeat;
      background-position: right 14px center;
      padding-right: 36px;
    }

    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: var(--space-4);
    }

    .selection-help {
      text-align: center;
      margin-top: var(--space-6);
      font-size: var(--text-base);
      color: var(--jc-gray-700);
    }

    .selection-help a {
      color: var(--jc-blue-600);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 4px;
      transition: color 0.2s ease, gap 0.2s ease;
    }

    .selection-help a:hover {
      color: var(--jc-blue-700);
      gap: 8px;
    }

    /* ============================================
       7. CTA Banner
       ============================================ */
    .cta-banner {
      background: linear-gradient(135deg, var(--jc-blue-800) 0%, var(--jc-blue-900) 100%);
      padding: var(--space-8) 0;
      position: relative;
      overflow: hidden;
    }

    .cta-banner::before {
      content: '';
      position: absolute;
      top: 0;
      right: 0;
      width: 500px;
      height: 500px;
      background: radial-gradient(circle, rgba(245, 124, 0, 0.1) 0%, transparent 70%);
      transform: translate(30%, -30%);
      pointer-events: none;
    }

    .cta-banner-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: var(--space-6);
      flex-wrap: wrap;
      position: relative;
      z-index: 1;
    }

    .cta-banner-text {
      color: #FFFFFF;
    }

    .cta-banner-title {
      font-size: var(--text-2xl);
      font-weight: 700;
      margin-bottom: var(--space-2);
    }

    .cta-banner-desc {
      font-size: var(--text-base);
      color: var(--jc-blue-200);
    }

    .cta-banner .btn-primary {
      height: 52px;
      padding: 0 var(--space-7);
      font-size: var(--text-base);
    }

    /* ============================================
       Responsive
       ============================================ */
    @media (max-width: 1024px) {
      .nav-main {
        display: none;
      }

      .header-phone {
        display: none;
      }

      .mobile-menu-btn {
        display: flex;
      }

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

      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }

      .selection-grid {
        grid-template-columns: 1fr;
      }

      .compare-table-wrapper {
        overflow-x: auto;
      }

      .compare-table {
        min-width: 700px;
      }
    }

    @media (max-width: 768px) {
      .page-header {
        padding: calc(72px + var(--space-6)) 0 var(--space-6);
      }

      .page-header-title {
        font-size: var(--text-3xl);
      }

      .page-header-desc {
        font-size: var(--text-base);
      }

      .products-grid {
        grid-template-columns: 1fr;
      }

      .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-6);
      }

      .cta-banner-inner {
        flex-direction: column;
        text-align: center;
      }

      .form-row {
        grid-template-columns: 1fr;
      }

      .section-title {
        font-size: var(--text-2xl);
      }

      .nav-3d-tab {
        padding: var(--space-2) var(--space-4);
        font-size: var(--text-sm);
      }

      .nav-3d-subtags {
        gap: var(--space-1);
      }

      .subtag-pill {
        padding: 5px 12px;
        font-size: var(--text-xs);
      }
    }

    @media (max-width: 480px) {
      .header-right .btn-primary {
        display: none;
      }
    }
    

    
    /* ===== Scroll Reveal Animations ===== */
    .reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }
    .js-enabled .reveal {
        opacity: 0;
        transform: translateY(28px);
        transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
                    transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
        will-change: opacity, transform;
    }
    .js-enabled .reveal.in-view {
        opacity: 1;
        transform: translateY(0);
    }
    .reveal-delay-1 { transition-delay: 0.06s; }
    .reveal-delay-2 { transition-delay: 0.12s; }
    .reveal-delay-3 { transition-delay: 0.18s; }
    .reveal-delay-4 { transition-delay: 0.24s; }
    .reveal-delay-5 { transition-delay: 0.30s; }
    .reveal-left {
        opacity: 1;
        transform: none;
    }
    .js-enabled .reveal-left {
        opacity: 0;
        transform: translateX(-40px);
        transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1),
                    transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
    }
    .js-enabled .reveal-left.in-view {
        opacity: 1;
        transform: translateX(0);
    }
    .reveal-right {
        opacity: 1;
        transform: none;
    }
    .js-enabled .reveal-right {
        opacity: 0;
        transform: translateX(40px);
        transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1),
                    transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
    }
    .js-enabled .reveal-right.in-view {
        opacity: 1;
        transform: translateX(0);
    }
    .reveal-scale {
        opacity: 1;
        transform: none;
    }
    .js-enabled .reveal-scale {
        opacity: 0;
        transform: scale(0.92);
        transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
                    transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
    }
    .js-enabled .reveal-scale.in-view {
        opacity: 1;
        transform: scale(1);
    }
.nav-3d { background: #FFFFFF; border-bottom: 1px solid var(--jc-gray-200); padding: var(--space-5) 0; }
.nav-3d-tabs { display: flex; gap: var(--space-3); flex-wrap: wrap; justify-content: center; margin-bottom: var(--space-4); }
.nav-3d-tab { padding: var(--space-3) var(--space-6); font-size: var(--text-base); font-weight: 600; color: var(--jc-gray-600); background: var(--jc-gray-50); border: 1px solid var(--jc-gray-200); border-radius: var(--radius-md); cursor: pointer; transition: all 0.25s ease; }
.nav-3d-tab:hover { color: var(--jc-primary); border-color: var(--jc-primary); background: var(--jc-blue-50); }
.nav-3d-tab.active { background: var(--jc-primary); color: #FFFFFF; border-color: var(--jc-primary); box-shadow: 0 4px 12px rgba(78, 78, 164, 0.3); }
.nav-3d-subtags { display: flex; gap: var(--space-2); flex-wrap: wrap; justify-content: center; }
.subtag-pill { padding: 6px 16px; font-size: var(--text-sm); color: var(--jc-gray-600); background: #FFFFFF; border: 1px solid var(--jc-gray-200); border-radius: 999px; cursor: pointer; transition: all 0.2s ease; }
.subtag-pill:hover { color: var(--jc-accent); border-color: var(--jc-accent); }
.subtag-pill.active { background: var(--jc-accent); color: #FFFFFF; border-color: var(--jc-accent); font-weight: 600; }