/* ============================================
       Resources Page Industrial Styles
       资源中心 - 高对比工业风
       ============================================ */

    /* ---- Base Overrides ---- */
    body {
        color: var(--jc-gray-700);
    }

    /* ---- Industrial 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: 1.5px solid transparent;
        transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.1s ease;
        white-space: nowrap;
        cursor: pointer;
        letter-spacing: 0.02em;
    }

    .btn:active {
        transform: translateY(1px);
    }

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

    .btn-primary:hover {
        background: var(--cta-amber-600);
        border-color: var(--cta-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(--cta-amber-700);
        border-color: var(--cta-amber-700);
    }

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

    .btn-secondary:hover {
        background: var(--jc-blue-50);
    }

    .btn-outline-light {
        background: transparent;
        color: #FFFFFF;
        border-color: rgba(255, 255, 255, 0.4);
    }

    .btn-outline-light:hover {
        background: rgba(255, 255, 255, 0.1);
        border-color: #FFFFFF;
    }

    /* ===== Product Detail Exclusive ===== */
    .product-header .article-tag-large {
        background: linear-gradient(135deg, var(--jc-amber-500), var(--jc-amber-400));
        box-shadow: 0 4px 16px rgba(211, 154, 69, 0.4);
    }

    .product-meta {
        gap: var(--space-6);
        font-size: var(--text-sm);
        color: var(--jc-blue-200);
        flex-wrap: wrap;
    }

    /* Product Hero Grid */
    .product-hero-grid {
        display: grid;
        grid-template-columns: 1.1fr 1fr;
        gap: var(--space-8);
        margin-bottom: var(--space-10);
        padding-bottom: var(--space-8);
        border-bottom: 1px solid var(--jc-gray-200);
    }

    .product-main-image {
        position: relative;
        border-radius: var(--radius-md);
        overflow: hidden;
        background: var(--jc-gray-50);
        box-shadow: 0 8px 32px rgba(78, 78, 164, 0.08);
    }

    .product-main-image img {
        width: 100%;
        height: 100%;
        min-height: 360px;
        object-fit: cover;
    }

    .product-image-badge {
        position: absolute;
        top: var(--space-4);
        left: var(--space-4);
        padding: 6px 12px;
        display: inline-flex;
        align-items: center;
        gap: 6px;
        background: linear-gradient(135deg, var(--jc-blue-600), var(--jc-blue-800));
        color: #FFFFFF;
        font-size: var(--text-sm);
        font-weight: 600;
        border-radius: var(--radius-sm);
        box-shadow: 0 4px 12px rgba(78, 78, 164, 0.4);
    }

    .product-quick-specs {
        background: var(--jc-gray-50);
        border: 1px solid var(--jc-gray-200);
        border-radius: var(--radius-md);
        padding: var(--space-6) var(--space-5);
    }

    .product-quick-specs h3 {
        font-size: var(--text-lg);
        font-weight: 600;
        color: var(--jc-gray-900);
        margin-bottom: var(--space-4);
        padding-bottom: var(--space-3);
        border-bottom: 2px solid var(--jc-blue-600);
        display: inline-block;
    }

    .quick-spec-grid {
        display: flex;
        flex-direction: column;
        gap: var(--space-3);
    }

    .quick-spec-item {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: var(--space-3) 0;
        border-bottom: 1px dashed var(--jc-gray-200);
    }

    .quick-spec-item:last-child {
        border-bottom: none;
    }

    .qs-label {
        font-size: var(--text-sm);
        color: var(--jc-gray-500);
    }

    .qs-value {
        font-size: var(--text-sm);
        font-weight: 600;
        color: var(--jc-gray-800);
        text-align: right;
    }

    .quick-spec-cta {
        margin-top: var(--space-4);
        padding-top: var(--space-4);
        border-top: 1px solid var(--jc-gray-200);
        text-align: center;
    }

    .spec-anchor {
        display: inline-block;
        font-size: var(--text-sm);
        font-weight: 600;
        color: var(--jc-blue-600);
    }

    .spec-anchor:hover {
        color: var(--jc-blue-700);
    }

    /* Feature Highlights */
    .feature-highlight-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-5);
        margin: var(--space-6) 0 var(--space-8);
    }

    .feature-highlight {
        padding: var(--space-5) var(--space-5);
        background: var(--jc-card);
        border: 1px solid var(--jc-gray-200);
        border-radius: var(--radius-md);
        transition: all 0.3s cubic-bezier(0.22, 1, 0.36, 1);
    }

    .feature-highlight:hover {
        border-color: var(--jc-blue-400);
        box-shadow: 0 8px 24px rgba(78, 78, 164, 0.1);
        transform: translateY(-3px);
    }

    .feature-icon {
        width: 44px;
        height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: var(--radius-sm);
        margin-bottom: var(--space-3);
    }

    .feature-icon svg {
        width: 22px;
        height: 22px;
        color: #FFFFFF;
    }

    .feature-icon.purity { background: linear-gradient(135deg, var(--jc-blue-500), var(--jc-blue-700)); }
    .feature-icon.chemical { background: linear-gradient(135deg, #0E8A4B, #0A6B3B); }
    .feature-icon.thermal { background: linear-gradient(135deg, #D39A45, #A87A38); }
    .feature-icon.processing { background: linear-gradient(135deg, #7677BE, #4E4EA4); }

    .feature-highlight h4 {
        font-size: var(--text-base);
        font-weight: 600;
        color: var(--jc-gray-900);
        margin-bottom: var(--space-2);
    }

    .feature-highlight p {
        font-size: var(--text-sm);
        line-height: 1.7;
        color: var(--jc-gray-600);
        margin: 0;
    }

    /* Application Scenes */
    .app-scene-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-5);
        margin: var(--space-6) 0 var(--space-8);
    }

    .app-scene {
        display: flex;
        gap: var(--space-4);
        padding: var(--space-5);
        background: var(--jc-blue-50);
        border: 1px solid var(--jc-blue-100);
        border-radius: var(--radius-md);
        transition: all 0.3s cubic-bezier(0.22, 1, 0.36, 1);
    }

    .app-scene:hover {
        background: var(--jc-blue-100);
        border-color: var(--jc-blue-400);
        transform: translateY(-2px);
        box-shadow: 0 8px 24px rgba(78, 78, 164, 0.1);
    }

    .app-scene-icon {
        width: 48px;
        height: 48px;
        flex-shrink: 0;
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: var(--radius-sm);
        background: linear-gradient(135deg, var(--jc-blue-600), var(--jc-blue-800));
        color: #FFFFFF;
    }

    .app-scene:nth-child(2) .app-scene-icon {
        background: linear-gradient(135deg, #D39A45, #A87A38);
    }

    .app-scene:nth-child(3) .app-scene-icon {
        background: linear-gradient(135deg, #0E8A4B, #0A6B3B);
    }

    .app-scene:nth-child(4) .app-scene-icon {
        background: linear-gradient(135deg, #C5221F, #8F1816);
    }

    .app-scene-content {
        flex: 1;
        min-width: 0;
    }

    .app-scene-content h4 {
        font-size: var(--text-base);
        font-weight: 600;
        color: var(--jc-gray-900);
        margin-bottom: var(--space-2);
    }

    .app-scene-content p {
        font-size: var(--text-sm);
        line-height: 1.7;
        color: var(--jc-gray-600);
        margin: 0;
    }

    .btn-lg {
        height: 52px;
        padding: 0 var(--space-6);
        font-size: var(--text-base);
    }

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

    /* ===== Page Hero ===== */
    .page-hero {
        position: relative;
        padding-top: 68px;
        background: linear-gradient(135deg, var(--jc-blue-800) 0%, var(--jc-blue-900) 50%, var(--jc-blue-950) 100%);
        overflow: hidden;
    }

    .page-hero::before {
        content: '';
        position: absolute;
        top: 0;
        right: 0;
        width: 60%;
        height: 100%;
        background: radial-gradient(ellipse at top right, rgba(245, 124, 0, 0.08) 0%, transparent 60%);
        pointer-events: none;
    }

    .page-hero-inner {
        position: relative;
        padding: var(--space-8) 0 var(--space-7);
        color: #FFFFFF;
    }

    .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);
    }

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

    .breadcrumb a:hover {
        color: var(--jc-amber-400);
    }

    .breadcrumb .separator {
        color: var(--jc-blue-300);
        font-size: 12px;
    }

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

    .page-hero-title {
        font-size: var(--text-4xl);
        font-weight: 800;
        margin-bottom: var(--space-4);
        letter-spacing: -0.01em;
        line-height: 1.2;
    }

    .page-hero-desc {
        font-size: var(--text-base);
        color: var(--jc-blue-200);
        max-width: 600px;
        line-height: var(--leading-relaxed);
    }

    /* ===== Tab Navigation ===== */
    .tab-section {
        background: #FFFFFF;
        border-bottom: 1px solid var(--jc-gray-200);
        position: sticky;
        top: 68px;
        z-index: 50;
    }

    .tab-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: var(--space-5);
        flex-wrap: wrap;
    }

    .tab-list {
        display: flex;
        align-items: center;
        gap: var(--space-1);
        list-style: none;
    }

    .tab-radio {
        display: none;
    }

    .tab-label {
        display: inline-flex;
        align-items: center;
        padding: var(--space-4) var(--space-5);
        font-size: var(--text-sm);
        font-weight: 500;
        color: var(--jc-gray-600);
        cursor: pointer;
        border-bottom: 2px solid transparent;
        transition: color 0.2s ease, border-color 0.2s ease;
        position: relative;
    }

    .tab-label:hover {
        color: var(--jc-blue-600);
    }

    #tab-all:checked ~ .tab-inner .tab-list .tab-label[for="tab-all"],
    #tab-material:checked ~ .tab-inner .tab-list .tab-label[for="tab-material"],
    #tab-selection:checked ~ .tab-inner .tab-list .tab-label[for="tab-selection"],
    #tab-tech:checked ~ .tab-inner .tab-list .tab-label[for="tab-tech"],
    #tab-faq:checked ~ .tab-inner .tab-list .tab-label[for="tab-faq"] {
        color: var(--jc-blue-600);
        font-weight: 600;
        border-bottom-color: var(--jc-blue-600);
    }

    .search-box {
        position: relative;
        flex-shrink: 0;
    }

    .search-box input {
        width: 240px;
        height: 40px;
        padding: 0 var(--space-4) 0 40px;
        font-size: var(--text-sm);
        font-family: inherit;
        color: var(--jc-gray-800);
        background: var(--jc-gray-50);
        border: 1px solid var(--jc-gray-200);
        border-radius: var(--radius-sm);
        transition: border-color 0.2s ease, background-color 0.2s ease;
    }

    .search-box input:focus {
        outline: none;
        border-color: var(--jc-blue-500);
        background: #FFFFFF;
    }

    .search-box input::placeholder {
        color: var(--jc-gray-400);
    }

    .search-icon {
        position: absolute;
        left: var(--space-3);
        top: 50%;
        transform: translateY(-50%);
        width: 16px;
        height: 16px;
        color: var(--jc-gray-400);
        pointer-events: none;
    }

    /* ===== Main Content ===== */
    .main-content {
        background: var(--jc-gray-50);
        padding: var(--space-8) 0;
    }

    .content-layout {
        display: grid;
        grid-template-columns: 1fr 320px;
        gap: var(--space-7);
        align-items: start;
    }

    /* ---- Article Grid ---- */
    .article-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-5);
    }

    .article-card {
        background: #FFFFFF;
        border: 1px solid var(--jc-gray-200);
        border-radius: var(--radius-md);
        overflow: hidden;
        transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
        display: flex;
        flex-direction: column;
    }

    .article-card:hover {
        border-color: var(--jc-blue-400);
        box-shadow: 0 8px 24px rgba(10, 74, 143, 0.1);
        transform: translateY(-2px);
    }

    .article-image {
        aspect-ratio: 16 / 9;
        overflow: hidden;
        background: var(--jc-gray-100);
    }

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

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

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

    .article-tag {
        display: inline-block;
        font-size: 11px;
        font-weight: 600;
        color: #FFFFFF;
        background: var(--jc-blue-600);
        padding: 3px 10px;
        border-radius: var(--radius-sm);
        margin-bottom: var(--space-3);
        align-self: flex-start;
        letter-spacing: 0.03em;
    }

    .article-title {
        font-size: var(--text-lg);
        font-weight: 700;
        color: var(--jc-gray-900);
        margin-bottom: var(--space-3);
        line-height: 1.4;
        transition: color 0.2s ease;
    }

    .article-card:hover .article-title {
        color: var(--jc-blue-600);
    }

    .article-excerpt {
        font-size: var(--text-sm);
        color: var(--jc-gray-500);
        line-height: var(--leading-relaxed);
        margin-bottom: var(--space-4);
        display: -webkit-box;
        -webkit-line-clamp: 3;
        -webkit-box-orient: vertical;
        overflow: hidden;
        flex: 1;
    }

    .article-meta {
        display: flex;
        align-items: center;
        gap: var(--space-3);
        font-size: var(--text-xs);
        color: var(--jc-gray-400);
        padding-top: var(--space-3);
        border-top: 1px solid var(--jc-gray-100);
    }

    .article-meta .dot {
        width: 3px;
        height: 3px;
        border-radius: 50%;
        background: var(--jc-gray-300);
    }

    /* ---- Pagination ---- */
    .pagination {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: var(--space-2);
        margin-top: var(--space-7);
    }

    .page-link {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-width: 36px;
        height: 36px;
        padding: 0 var(--space-3);
        font-size: var(--text-sm);
        font-weight: 500;
        color: var(--jc-gray-600);
        background: #FFFFFF;
        border: 1px solid var(--jc-gray-200);
        border-radius: var(--radius-sm);
        transition: all 0.2s ease;
    }

    .page-link:hover {
        color: var(--jc-blue-600);
        border-color: var(--jc-blue-400);
    }

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

    .page-link.ellipsis {
        border-color: transparent;
        background: transparent;
        color: var(--jc-gray-400);
        cursor: default;
    }

    /* ===== Sidebar ===== */
    .sidebar {
        display: flex;
        flex-direction: column;
        gap: var(--space-5);
        position: sticky;
        top: 136px;
    }

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

    .widget-header {
        padding: var(--space-4) var(--space-5);
        border-bottom: 1px solid var(--jc-gray-200);
    }

    .widget-title {
        font-size: var(--text-base);
        font-weight: 700;
        color: var(--jc-gray-900);
    }

    .widget-body {
        padding: var(--space-4) var(--space-5);
    }

    /* ---- Popular Articles ---- */
    .popular-list {
        list-style: none;
        counter-reset: popular;
    }

    .popular-item {
        counter-increment: popular;
        display: flex;
        align-items: flex-start;
        gap: var(--space-3);
        padding: var(--space-3) 0;
        border-bottom: 1px solid var(--jc-gray-100);
    }

    .popular-item:last-child {
        border-bottom: none;
        padding-bottom: 0;
    }

    .popular-item:first-child {
        padding-top: 0;
    }

    .popular-rank {
        flex-shrink: 0;
        width: 24px;
        height: 24px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-family: var(--font-mono);
        font-size: var(--text-xs);
        font-weight: 700;
        color: var(--jc-gray-400);
        background: var(--jc-gray-100);
        border-radius: var(--radius-sm);
    }

    .popular-item:nth-child(1) .popular-rank,
    .popular-item:nth-child(2) .popular-rank,
    .popular-item:nth-child(3) .popular-rank {
        color: #FFFFFF;
        background: var(--jc-amber-500);
    }

    .popular-content {
        flex: 1;
        min-width: 0;
    }

    .popular-title {
        font-size: var(--text-sm);
        font-weight: 500;
        color: var(--jc-gray-700);
        line-height: 1.5;
        margin-bottom: 4px;
        transition: color 0.2s ease;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .popular-item:hover .popular-title {
        color: var(--jc-blue-600);
    }

    .popular-views {
        font-size: 11px;
        color: var(--jc-gray-400);
    }

    /* ---- Download Card ---- */
    .download-card {
        background: linear-gradient(135deg, var(--jc-blue-700) 0%, var(--jc-blue-800) 100%);
        padding: var(--space-6);
        color: #FFFFFF;
        position: relative;
        overflow: hidden;
    }

    .download-card::before {
        content: '';
        position: absolute;
        top: -50%;
        right: -30%;
        width: 200px;
        height: 200px;
        background: radial-gradient(circle, rgba(245, 124, 0, 0.15) 0%, transparent 60%);
        pointer-events: none;
    }

    .download-icon {
        width: 40px;
        height: 40px;
        margin-bottom: var(--space-4);
        color: var(--jc-amber-400);
        position: relative;
    }

    .download-title {
        font-size: var(--text-lg);
        font-weight: 700;
        margin-bottom: var(--space-2);
        position: relative;
    }

    .download-desc {
        font-size: var(--text-sm);
        color: var(--jc-blue-200);
        line-height: var(--leading-relaxed);
        margin-bottom: var(--space-5);
        position: relative;
    }

    .download-card .btn-primary {
        width: 100%;
        position: relative;
    }

    /* ---- FAQ Quick Links ---- */
    .faq-quick-list {
        list-style: none;
    }

    .faq-quick-item {
        padding: var(--space-3) 0;
        border-bottom: 1px solid var(--jc-gray-100);
    }

    .faq-quick-item:last-child {
        border-bottom: none;
    }

    .faq-quick-item a {
        display: flex;
        align-items: center;
        gap: var(--space-2);
        font-size: var(--text-sm);
        color: var(--jc-gray-600);
        line-height: 1.5;
        transition: color 0.2s ease;
    }

    .faq-quick-item a:hover {
        color: var(--jc-blue-600);
    }

    .faq-quick-item .q-icon {
        flex-shrink: 0;
        width: 16px;
        height: 16px;
        color: var(--jc-blue-500);
    }

    .view-all-faq {
        display: inline-flex;
        align-items: center;
        gap: var(--space-2);
        font-size: var(--text-sm);
        font-weight: 600;
        color: var(--jc-blue-600);
        transition: gap 0.2s ease;
    }

    .view-all-faq:hover {
        gap: var(--space-3);
    }

    .view-all-faq svg {
        width: 14px;
        height: 14px;
    }

    /* ===== FAQ Section ===== */
    .faq-section {
        background: var(--jc-gray-50);
        padding: var(--space-9) 0;
    }

    .faq-header {
        text-align: center;
        margin-bottom: var(--space-8);
    }

    .faq-eyebrow {
        display: inline-block;
        font-size: var(--text-xs);
        font-weight: 700;
        color: var(--cta-amber-500);
        letter-spacing: 0.15em;
        margin-bottom: var(--space-3);
        text-transform: uppercase;
    }

    .faq-title {
        font-size: var(--text-4xl);
        font-weight: 700;
        color: var(--jc-gray-900);
        line-height: var(--leading-tight);
        margin-bottom: var(--space-4);
    }

    .faq-desc {
        font-size: var(--text-base);
        color: var(--jc-gray-500);
        max-width: 640px;
        margin: 0 auto;
        line-height: var(--leading-relaxed);
    }

    .faq-list {
        max-width: 800px;
        margin: 0 auto;
    }

    .faq-item {
        background: #FFFFFF;
        border: 1px solid var(--jc-gray-200);
        border-radius: var(--radius-md);
        margin-bottom: var(--space-3);
        overflow: hidden;
        transition: border-color 0.2s ease, box-shadow 0.2s ease;
    }

    .faq-item:hover {
        border-color: var(--jc-blue-300);
    }

    .faq-item[open] {
        border-color: var(--jc-blue-500);
        box-shadow: 0 4px 12px rgba(10, 74, 143, 0.08);
    }

    .faq-item summary {
        list-style: none;
        cursor: pointer;
        padding: var(--space-5);
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: var(--space-4);
        font-size: var(--text-base);
        font-weight: 600;
        color: var(--jc-gray-800);
        transition: color 0.2s ease;
        user-select: none;
    }

    .faq-item summary::-webkit-details-marker {
        display: none;
    }

    .faq-item summary:hover {
        color: var(--jc-blue-600);
    }

    .faq-item[open] summary {
        color: var(--jc-blue-600);
    }

    .faq-question-text {
        flex: 1;
    }

    .faq-toggle {
        flex-shrink: 0;
        width: 24px;
        height: 24px;
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--jc-gray-400);
        transition: transform 0.2s ease, color 0.2s ease;
    }

    .faq-item[open] .faq-toggle {
        transform: rotate(45deg);
        color: var(--jc-blue-600);
    }

    .faq-answer {
        padding: 0 var(--space-5) var(--space-5);
        font-size: var(--text-sm);
        color: var(--jc-gray-500);
        line-height: var(--leading-relaxed);
        border-top: 1px solid var(--jc-gray-100);
        padding-top: var(--space-4);
    }

    /* ===== Newsletter Section ===== */
    .newsletter-section {
        background: #FFFFFF;
        padding: var(--space-8) 0;
        border-top: 1px solid var(--jc-gray-200);
        border-bottom: 1px solid var(--jc-gray-200);
    }

    .newsletter-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: var(--space-7);
        flex-wrap: wrap;
    }

    .newsletter-text {
        flex: 1;
        min-width: 300px;
    }

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

    .newsletter-desc {
        font-size: var(--text-base);
        color: var(--jc-gray-500);
    }

    .newsletter-form {
        display: flex;
        gap: var(--space-3);
        flex-shrink: 0;
    }

    .newsletter-input {
        width: 320px;
        height: 48px;
        padding: 0 var(--space-4);
        font-size: var(--text-sm);
        font-family: inherit;
        color: var(--jc-gray-800);
        background: var(--jc-gray-50);
        border: 1px solid var(--jc-gray-200);
        border-radius: var(--radius-sm);
        transition: border-color 0.2s ease, background-color 0.2s ease;
    }

    .newsletter-input:focus {
        outline: none;
        border-color: var(--jc-blue-500);
        background: #FFFFFF;
    }

    .newsletter-input::placeholder {
        color: var(--jc-gray-400);
    }

    .newsletter-form .btn-primary {
        height: 48px;
        padding: 0 var(--space-6);
    }

    /* ===== 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: -50%;
        right: -10%;
        width: 500px;
        height: 500px;
        background: radial-gradient(circle, rgba(245, 124, 0, 0.1) 0%, transparent 60%);
        pointer-events: none;
    }

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

    .cta-banner-text {
        color: #FFFFFF;
        flex: 1;
    }

    .cta-banner-title {
        font-size: var(--text-3xl);
        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: 56px;
        padding: 0 var(--space-7);
        font-size: var(--text-base);
    }

    /* ===== Article Detail ===== */
    .article-breadcrumb {
        padding-top: 69px;
        background: var(--jc-blue-900);
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .article-breadcrumb ol {
        list-style: none;
        display: flex;
        align-items: center;
        gap: var(--space-2);
        padding: var(--space-3) 0;
        margin: 0;
        font-size: var(--text-sm);
    }

    .article-breadcrumb li {
        display: flex;
        align-items: center;
        gap: var(--space-2);
        color: var(--jc-blue-200);
    }

    .article-breadcrumb li::after {
        content: '/';
        color: rgba(255, 255, 255, 0.2);
        margin-left: var(--space-2);
    }

    .article-breadcrumb li:last-child::after {
        display: none;
    }

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

    .article-breadcrumb a:hover {
        color: var(--jc-white);
    }

    .article-breadcrumb li.current {
        color: var(--jc-white);
        font-weight: 500;
    }

    .article-tag-large {
        display: inline-block;
        padding: 6px 16px;
        background: var(--jc-amber-500);
        color: var(--jc-white);
        font-size: var(--text-sm);
        font-weight: 600;
        border-radius: var(--radius-sm);
        margin-bottom: var(--space-5);
        letter-spacing: 0.02em;
    }

    .article-main-title {
        font-size: 2.25rem;
        font-weight: 700;
        line-height: 1.3;
        margin-bottom: var(--space-4);
        color: var(--jc-white);
    }

    .article-subtitle {
        font-size: 1.05rem;
        line-height: 1.7;
        color: var(--jc-blue-200);
        margin-bottom: var(--space-6);
        max-width: 680px;
    }

    .article-detail-section {
        padding: var(--space-8) 0;
        background: var(--page-bg);
    }

    .detail-layout {
        display: grid;
        grid-template-columns: 1fr 320px;
        gap: var(--space-6);
        align-items: start;
    }

    .article-main-content {
        background: var(--jc-white);
        border-radius: var(--radius-md);
        /* padding: var(--space-7) var(--space-6);
        box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04); */
    }

    .article-featured-image {
        margin-bottom: var(--space-8);
        border-radius: var(--radius-md);
        overflow: hidden;
    }

    .article-featured-image img {
        width: 100%;
        height: auto;
        display: block;
    }

    .image-caption {
        font-size: var(--text-sm);
        color: var(--jc-gray-500);
        text-align: center;
        padding: var(--space-3);
        background: var(--jc-gray-50);
        border-radius: 0 0 var(--radius-md) var(--radius-md);
    }

    .article-lead {
        font-size: 1.1rem;
        line-height: 1.85;
        color: var(--jc-gray-700);
        padding: var(--space-5) var(--space-6);
        background: var(--jc-blue-50);
        border-left: 4px solid var(--jc-blue-600);
        border-radius: 0 var(--radius-md) var(--radius-md) 0;
        margin-bottom: var(--space-8);
    }

    .article-h2 {
        font-size: 1.5rem;
        font-weight: 700;
        color: var(--jc-gray-900);
        margin-top: var(--space-10);
        margin-bottom: var(--space-5);
        padding-left: var(--space-4);
        border-left: 4px solid var(--jc-amber-500);
        line-height: 1.4;
    }

    .article-h2:first-of-type {
        margin-top: 0;
    }

    .article-h3 {
        font-size: 1.15rem;
        font-weight: 600;
        color: var(--jc-gray-800);
        margin-top: var(--space-7);
        margin-bottom: var(--space-4);
    }

    .article-main-content p {
        font-size: var(--text-base);
        line-height: 1.85;
        color: var(--jc-gray-700);
        margin-bottom: var(--space-5);
    }

    .article-main-content strong {
        color: var(--jc-gray-900);
        font-weight: 600;
    }

    .article-list {
        padding-left: var(--space-5);
        margin-bottom: var(--space-5);
    }

    .article-list li {
        font-size: var(--text-base);
        line-height: 1.85;
        color: var(--jc-gray-700);
        margin-bottom: var(--space-3);
        padding-left: var(--space-2);
    }

    .article-list li::marker {
        color: var(--jc-blue-600);
        font-weight: 600;
    }

    .article-data-cards {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: var(--space-4);
        margin: var(--space-6) 0 var(--space-8);
    }

    .data-card {
        background: linear-gradient(135deg, var(--jc-blue-800), var(--jc-blue-700));
        border-radius: var(--radius-md);
        padding: var(--space-5) var(--space-4);
        text-align: center;
        color: var(--jc-white);
    }

    .data-card-value {
        font-size: 1.75rem;
        font-weight: 700;
        color: var(--jc-amber-400);
        margin-bottom: var(--space-2);
        line-height: 1.2;
    }

    .data-card-value span {
        font-size: 0.9rem;
        font-weight: 500;
        color: var(--jc-blue-200);
        margin-left: 2px;
    }

    .data-card-label {
        font-size: var(--text-sm);
        color: var(--jc-blue-200);
        line-height: 1.4;
    }

    .article-table-wrapper {
        overflow-x: auto;
        margin: var(--space-6) 0 var(--space-8);
        border-radius: var(--radius-md);
        border: 1px solid var(--jc-gray-200);
    }

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

    .article-table th {
        background: var(--jc-blue-700);
        color: var(--jc-white);
        padding: var(--space-3) var(--space-4);
        text-align: left;
        font-weight: 600;
    }

    .article-table td {
        padding: var(--space-3) var(--space-4);
        border-bottom: 1px solid var(--jc-gray-100);
        color: var(--jc-gray-700);
    }

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

    .article-note {
        background: var(--state-info-bg);
        border-left: 3px solid var(--state-info);
        padding: var(--space-4) var(--space-5);
        border-radius: 0 var(--radius-md) var(--radius-md) 0;
        font-size: var(--text-sm);
        color: var(--jc-gray-700);
        margin: var(--space-6) 0;
    }

    .article-quote {
        position: relative;
        background: var(--jc-blue-50);
        border-left: 4px solid var(--jc-blue-600);
        padding: var(--space-6) var(--space-8) var(--space-6) var(--space-7);
        border-radius: 0 var(--radius-md) var(--radius-md) 0;
        margin: var(--space-8) 0;
        font-size: 1.05rem;
        line-height: 1.8;
        color: var(--jc-gray-700);
        font-style: italic;
    }

    .article-quote::before {
        content: '"';
        position: absolute;
        top: -10px;
        left: 12px;
        font-size: 4rem;
        color: var(--jc-blue-200);
        font-family: Georgia, serif;
        line-height: 1;
        font-style: normal;
    }

    .article-quote cite {
        display: block;
        margin-top: var(--space-3);
        font-size: var(--text-sm);
        color: var(--jc-gray-500);
        font-style: normal;
        text-align: right;
    }

    .article-cta-box {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: var(--space-6);
        background: linear-gradient(135deg, var(--jc-blue-800), var(--jc-blue-700));
        border-radius: var(--radius-md);
        padding: var(--space-6) var(--space-8);
        margin: var(--space-10) 0;
        color: var(--jc-white);
    }

    .article-cta-text h4 {
        font-size: 1.2rem;
        font-weight: 600;
        margin-bottom: var(--space-2);
    }

    .article-cta-text p {
        font-size: var(--text-sm);
        color: var(--jc-blue-200);
        margin: 0;
    }

    .article-cta-box .btn-primary {
        background: var(--jc-amber-500);
        color: var(--jc-white);
        white-space: nowrap;
    }

    .article-cta-box .btn-primary:hover {
        background: var(--jc-amber-600);
    }

    .article-tags {
        display: flex;
        align-items: center;
        gap: var(--space-3);
        flex-wrap: wrap;
        padding: var(--space-6) 0;
        border-top: 1px solid var(--jc-gray-200);
        border-bottom: 1px solid var(--jc-gray-200);
        margin: var(--space-8) 0;
    }

    .tags-label {
        font-size: var(--text-sm);
        font-weight: 600;
        color: var(--jc-gray-700);
    }

    .tag-chip {
        display: inline-block;
        padding: 4px 12px;
        background: var(--jc-blue-50);
        color: var(--jc-blue-600);
        font-size: var(--text-xs);
        font-weight: 500;
        border-radius: var(--radius-full);
        transition: all 0.2s ease;
    }

    .tag-chip:hover {
        background: var(--jc-blue-100);
        color: var(--jc-blue-700);
    }

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

    .article-nav a {
        display: block;
        padding: var(--space-5) var(--space-5);
        background: var(--jc-gray-50);
        border: 1px solid var(--jc-gray-200);
        border-radius: var(--radius-md);
        transition: all 0.2s ease;
    }

    .article-nav a:hover {
        border-color: var(--jc-blue-400);
        background: var(--jc-white);
        transform: translateY(-2px);
        box-shadow: 0 4px 12px rgba(78, 78, 164, 0.1);
    }

    /* ===== Sidebar ===== */
    .article-sidebar {
        position: sticky;
        top: 100px;
    }

    .sidebar-widget {
        background: var(--jc-white);
        border: 1px solid var(--jc-gray-200);
        border-radius: var(--radius-md);
        padding: var(--space-5);
        margin-bottom: var(--space-5);
    }

    .widget-title {
        font-size: 1rem;
        font-weight: 600;
        color: var(--jc-gray-900);
        margin-bottom: var(--space-4);
        padding-bottom: var(--space-3);
        border-bottom: 2px solid var(--jc-blue-600);
        display: inline-block;
    }

    .toc-list {
        list-style: none;
        padding: 0;
        margin: 0;
    }

    .toc-list li {
        margin-bottom: var(--space-2);
    }

    .toc-list li.sub {
        padding-left: var(--space-4);
    }

    .toc-list a {
        font-size: var(--text-sm);
        color: var(--jc-gray-600);
        transition: color 0.2s ease;
        line-height: 1.6;
    }

    .toc-list a:hover {
        color: var(--jc-blue-600);
    }

    .popular-articles {
        display: flex;
        flex-direction: column;
        gap: var(--space-4);
    }

    .popular-item {
        display: flex;
        gap: var(--space-3);
        align-items: flex-start;
    }

    .popular-rank {
        flex-shrink: 0;
        width: 22px;
        height: 22px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: var(--jc-gray-200);
        color: var(--jc-gray-600);
        font-size: var(--text-xs);
        font-weight: 700;
        border-radius: var(--radius-sm);
    }

    .popular-item:nth-child(1) .popular-rank {
        background: var(--jc-amber-500);
        color: var(--jc-white);
    }

    .popular-item:nth-child(2) .popular-rank {
        background: var(--jc-amber-400);
        color: var(--jc-white);
    }

    .popular-item:nth-child(3) .popular-rank {
        background: var(--jc-amber-300);
        color: var(--jc-white);
    }

    .popular-info {
        flex: 1;
        min-width: 0;
    }

    .popular-title {
        font-size: var(--text-sm);
        color: var(--jc-gray-700);
        line-height: 1.5;
        margin-bottom: 2px;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        transition: color 0.2s ease;
    }

    .popular-item:hover .popular-title {
        color: var(--jc-blue-600);
    }

    .popular-views {
        font-size: 12px;
        color: var(--jc-gray-400);
    }

    .sidebar-download {
        background: linear-gradient(135deg, var(--jc-blue-800), var(--jc-blue-900));
        border-radius: var(--radius-md);
        padding: var(--space-6) var(--space-5);
        text-align: center;
        color: var(--jc-white);
    }

    .sidebar-download .download-icon {
        width: 48px;
        height: 48px;
        margin: 0 auto var(--space-3);
        display: flex;
        align-items: center;
        justify-content: center;
        background: rgba(255, 255, 255, 0.1);
        border-radius: var(--radius-full);
    }

    .sidebar-download .download-icon svg {
        width: 24px;
        height: 24px;
        color: var(--jc-amber-400);
    }

    .sidebar-download h4 {
        font-size: 1rem;
        font-weight: 600;
        margin-bottom: var(--space-2);
    }

    .sidebar-download p {
        font-size: var(--text-sm);
        color: var(--jc-blue-200);
        margin-bottom: var(--space-4);
        line-height: 1.6;
    }

    .sidebar-download .btn-light {
        width: 100%;
        justify-content: center;
        border-color: rgba(255, 255, 255, 0.3);
        color: var(--jc-white);
    }

    .sidebar-download .btn-light:hover {
        background: rgba(255, 255, 255, 0.1);
    }

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

        .header-phone {
            display: none;
        }

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

        .content-layout {
            grid-template-columns: 1fr;
        }

        .sidebar {
            position: static;
            order: -1;
        }

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

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

    @media (max-width: 768px) {
        .page-hero-inner {
            padding: var(--space-7) 0 var(--space-6);
        }

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

        .tab-inner {
            flex-direction: column;
            align-items: flex-start;
            gap: var(--space-3);
            padding: var(--space-3) 0;
        }

        .tab-list {
            width: 100%;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
        }

        .tab-label {
            padding: var(--space-3) var(--space-4);
            white-space: nowrap;
        }

        .search-box {
            width: 100%;
        }

        .search-box input {
            width: 100%;
        }

        .main-content {
            padding: var(--space-6) 0;
        }

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

        .newsletter-inner {
            flex-direction: column;
            text-align: center;
            align-items: stretch;
        }

        .newsletter-form {
            flex-direction: column;
        }

        .newsletter-input {
            width: 100%;
        }

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

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

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

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

    @media (max-width: 480px) {
        .page-hero-title {
            font-size: var(--text-2xl);
        }

        .pagination {
            gap: var(--space-1);
        }

        .page-link {
            min-width: 32px;
            height: 32px;
            padding: 0 var(--space-2);
            font-size: var(--text-xs);
        }
    }
    

    
    /* ===== 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);
    }
.article-header-section {
    position: relative;
    overflow: hidden;
    padding: calc(72px + var(--space-8)) 0 var(--space-8);
    background: linear-gradient(135deg, var(--jc-blue-700) 0%, var(--jc-blue-900) 100%);
}
.article-header-section::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: radial-gradient(ellipse at right center, rgba(218, 170, 98, 0.10) 0%, transparent 60%);
    pointer-events: none;
}
.article-header-meta { color: var(--jc-blue-200); }
.article-header-meta .meta-item { color: var(--jc-blue-200); }
.article-header-inner { max-width: 860px; }
.article-header-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
    margin-top: var(--space-5);
    font-size: var(--text-sm);
}
.article-header-meta .meta-item {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
}
.article-header-meta .meta-item svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}
.article-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
    margin-top: var(--space-8);
}
.article-nav-prev,
.article-nav-next {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    padding: var(--space-4) var(--space-5);
    background: #FFFFFF;
    border: 1px solid var(--jc-gray-200);
    border-radius: var(--radius-lg);
    text-decoration: none;
    transition: all 0.25s ease;
}
.article-nav-next {
    align-items: flex-end;
    text-align: right;
}
.nav-label {
    font-size: var(--text-xs);
    color: var(--jc-gray-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.nav-title {
    font-size: var(--text-base);
    font-weight: 600;
    color: var(--jc-gray-900);
}
.article-nav-prev:hover,
.article-nav-next:hover {
    border-color: var(--jc-primary);
    box-shadow: 0 4px 16px rgba(78, 78, 164, 0.12);
    transform: translateY(-2px);
}

/* === Product Gallery (多图展示) === */
/* ===== 产品主图 + 快速参考 — Industrial-Refined ===== */
.product-hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 360px;
    gap: 2.5rem;
    margin-bottom: 3rem;
    align-items: start;
}

/* Gallery: 主图 4:3 + 下方横向缩略图（一行4个，超出滚动） */
.product-gallery {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.product-main-image {
    position: relative;
    width: 100%;
    aspect-ratio: 4/3;
    border-radius: 2px;
    overflow: hidden;
    background: var(--jc-gray-100);
    border: 1px solid var(--jc-gray-200);
}
.product-main-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: opacity 0.35s ease, transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
.product-main-image:hover img { transform: scale(1.025); }

/* 图片编号角标 — 03 / 05 等 */
.product-main-image::after {
    content: attr(data-counter);
    position: absolute;
    bottom: 14px; left: 14px;
    font-family: ui-monospace, 'JetBrains Mono', 'SF Mono', Menlo, monospace;
    font-size: 10px; font-weight: 500;
    letter-spacing: 0.1em;
    color: rgba(255,255,255,0.92);
    background: rgba(18,21,28,0.72);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    padding: 4px 10px;
    border-radius: 2px;
    pointer-events: none;
    text-transform: uppercase;
}
.product-image-badge {
    position: absolute; top: 14px; right: 14px; left: auto;
    display: inline-flex; align-items: center; gap: 6px;
    padding: 5px 12px;
    background: var(--jc-blue-900);
    color: #FFFFFF;
    font-size: 10px; font-weight: 600;
    border-radius: 2px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}
.product-image-badge svg { width: 10px; height: 10px; }

/* 横向缩略图轨道 — 一行4个，超出滚动 */
.product-thumbs {
    display: flex;
    flex-direction: row;
    gap: 8px;
    overflow-x: auto;
    overflow-y: hidden;
    scroll-behavior: smooth;
    padding-bottom: 4px;
}
.product-thumbs::-webkit-scrollbar {
    height: 6px;
}
.product-thumbs::-webkit-scrollbar-track {
    background: var(--jc-gray-100);
    border-radius: 3px;
}
.product-thumbs::-webkit-scrollbar-thumb {
    background: var(--jc-gray-300);
    border-radius: 3px;
}
.product-thumbs::-webkit-scrollbar-thumb:hover {
    background: var(--jc-gray-400);
}
.thumb-item {
    position: relative;
    flex: 0 0 calc(25% - 6px);
    aspect-ratio: 1;
    padding: 0;
    border: 1px solid var(--jc-gray-200);
    border-radius: 2px;
    overflow: hidden;
    cursor: pointer;
    background: var(--jc-gray-100);
    transition: border-color 0.2s ease, transform 0.2s ease, border-width 0.15s ease;
}
.thumb-item:hover { border-color: var(--jc-gray-400); }
.thumb-item.active {
    border-color: var(--jc-blue-600);
    border-width: 2px;
    background: #fff;
}
.thumb-item.active::before {
    content: '';
    position: absolute;
    bottom: -1px; left: 0;
    width: 100%; height: 2px;
    background: var(--jc-blue-600);
    border-radius: 1px 1px 0 0;
}
.thumb-item img {
    width: 100%; height: 100%;
    object-fit: cover;
    display: block;
    transition: opacity 0.2s ease;
}
.thumb-item:not(.active) img { opacity: 0.75; }
.thumb-item:hover img { opacity: 1; }

/* ===== Quick Specs: 技术规格表风格 ===== */
.product-quick-specs {
    padding: 28px 28px 24px;
    background: linear-gradient(180deg, #FAFBFC 0%, #FFFFFF 100%);
    border: 1px solid var(--jc-gray-200);
    border-radius: 2px;
    height: fit-content;
    position: relative;
}
.product-quick-specs::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 32px; height: 3px;
    background: var(--jc-amber-500);
}
.product-quick-specs h3 {
    font-size: 10px;
    font-weight: 600;
    color: var(--jc-gray-500);
    text-transform: uppercase;
    letter-spacing: 0.18em;
    margin: 8px 0 22px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--jc-gray-200);
    display: flex;
    align-items: center;
    gap: 12px;
}
.product-quick-specs h3::after {
    content: '· Specification Sheet';
    font-family: ui-monospace, 'JetBrains Mono', monospace;
    font-size: 9px;
    font-weight: 400;
    color: var(--jc-gray-400);
    letter-spacing: 0.1em;
    text-transform: none;
}

/* 编号行 + 虚线分隔 */
.quick-spec-grid {
    display: flex;
    flex-direction: column;
    gap: 0;
    counter-reset: spec-row;
}
.quick-spec-item {
    display: grid;
    grid-template-columns: 22px 1fr auto;
    align-items: center;
    gap: 10px;
    padding: 13px 0;
    border-bottom: 1px dashed var(--jc-gray-200);
    counter-increment: spec-row;
}
.quick-spec-item:last-child { border-bottom: none; padding-bottom: 4px; }
.quick-spec-item::before {
    content: counter(spec-row, decimal-leading-zero);
    font-family: ui-monospace, 'JetBrains Mono', monospace;
    font-size: 10px; font-weight: 500;
    color: var(--jc-gray-400);
    letter-spacing: 0.05em;
}
.qs-label, .quick-spec-label {
    font-size: 13px;
    color: var(--jc-gray-500);
    font-weight: 500;
    line-height: 1;
}
.qs-value, .quick-spec-value {
    font-family: ui-monospace, 'JetBrains Mono', 'SF Mono', Menlo, monospace;
    font-size: 13px;
    font-weight: 600;
    color: var(--jc-gray-900);
    text-align: right;
    letter-spacing: 0.01em;
    line-height: 1;
}

/* 深色 CTA */
.quick-spec-cta {
    margin-top: 22px;
    padding-top: 0;
    border-top: none;
}
.spec-anchor {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 11px;
    font-weight: 600;
    color: #fff;
    background: var(--jc-gray-900);
    text-decoration: none;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    padding: 14px 18px;
    border-radius: 2px;
    transition: background 0.2s ease, color 0.2s ease;
}
.spec-anchor:hover {
    background: var(--jc-blue-900);
    color: var(--jc-amber-400);
}
.spec-anchor::after {
    content: '→';
    font-size: 13px;
    transition: transform 0.2s ease;
}
.spec-anchor:hover::after { transform: translateX(3px); }

@media (max-width: 960px) {
    .product-hero-grid { grid-template-columns: 1fr; }
    .product-gallery {
        gap: 12px;
    }
    .product-thumbs {
        gap: 6px;
    }
    .thumb-item { flex: 0 0 calc(25% - 4.5px); }
    .thumb-item.active { outline: 2px solid var(--jc-blue-600); outline-offset: -2px; }
    .thumb-item.active::before { display: none; }
    .product-quick-specs { order: -1; }
}