/* --- HOTLINE --- */
    .product-hotline-bar .hotline-card-item {
        box-shadow: 0 1px 3px rgba(0,0,0,0.05);
        transition: transform 0.2s ease, box-shadow 0.2s ease;
    }
    .product-hotline-bar .hotline-card-item:hover {
        transform: translateY(-2px);
        box-shadow: 0 4px 10px rgba(0,0,0,0.12);
    }
    .product-hotline-bar .hotline-phone,
    .product-hotline-bar .hotline-name { color: #ffffff !important; }
    @media (max-width: 576px) {
        .product-hotline-bar .hotline-grid { flex-wrap: nowrap; overflow-x: auto; padding-bottom: 8px; scroll-behavior: smooth; }
        .product-hotline-bar .hotline-grid .col { flex: 0 0 70%; max-width: 70%; }
    }

    /* =============================================
       GALLERY SẮP XẾP (SLICK)
       ============================================= */
    .product-gallery-wrapper {
        background: #fff;
        border-radius: 8px;
        overflow: hidden;
    }
    
    /* Main Slider */
    .main-slider {
        border: 1px solid #eee;
        border-radius: 8px;
        margin-bottom: 10px;
        background: #f8f9fa;
    }
    .main-slider .slide-item {
        aspect-ratio: 4 / 3; /* Tỷ lệ chuẩn 4:3 */
        width: 100%;
        position: relative;
        overflow: hidden;
    }
    
    /* Ảnh trong slide */
    .main-slider .slide-item a {
        display: block;
        width: 100%;
        height: 100%;
    }
    .main-slider .slide-item img.main-image {
        width: 100%;
        height: 100%;
        object-fit: contain; /* Giữ nguyên tỷ lệ ảnh */
        background: #fff;
    }

    /* VIDEO INLINE IFRAME */
    .video-inline-wrapper {
        position: absolute;
        top: 0; left: 0; width: 100%; height: 100%;
        background: #000;
    }
    .video-inline-wrapper iframe {
        width: 100%;
        height: 100%;
        border: none;
    }

    /* Thumbnail Slider */
    .thumb-slider {
        margin: 0 -5px;
    }
    .thumb-slider .thumb-item {
        padding: 0 5px;
        cursor: pointer;
        outline: none;
    }
    .thumb-slider .thumb-item img {
        width: 100%;
        aspect-ratio: 1 / 1;
        object-fit: cover;
        border: 2px solid transparent;
        border-radius: 6px;
        transition: border-color 0.2s;
    }
    .thumb-slider .slick-current .thumb-item img,
    .thumb-slider .thumb-item:hover img {
        border-color: #007bff;
    }

    /* Thumbnail Video Đặc biệt */
    .video-thumb-wrapper {
        position: relative;
        width: 100%;
        height: 100%;
    }
    .video-thumb-wrapper img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        border-radius: 6px;
        filter: brightness(0.8);
    }
    .video-play-badge {
        position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
        pointer-events: none;
        filter: drop-shadow(0 2px 4px rgba(0,0,0,0.5));
    }

    /* Custom Slick Arrows */
    .main-slider .slick-prev,
    .main-slider .slick-next {
        z-index: 10;
        width: 36px;
        height: 36px;
        background: rgba(0,0,0,0.5);
        border-radius: 50%;
    }
    .main-slider .slick-prev { left: 10px; }
    .main-slider .slick-next { right: 10px; }
    .main-slider .slick-prev:hover,
    .main-slider .slick-next:hover { background: rgba(0,0,0,0.8); }
    .main-slider .slick-prev:before,
    .main-slider .slick-next:before { font-size: 20px; line-height: 36px; color: #fff; opacity: 1; }

    /* =============================================
       THÔNG TIN & CSS KHÁC
       ============================================= */
    .product-title { font-size: 1.8rem; font-weight: 600; margin-bottom: 1.5rem; color: #2c3e50; }
    .box-selling { font-size: 16px; background: #f8f9fa; padding: 25px; border-radius: 8px; box-shadow: 0 2px 10px rgba(0,0,0,0.05); }
    .product-meta-list { list-style: none; padding-left: 0; }
    .product-meta-list li { margin-bottom: 10px; color: #495057; }
    .meta-label { font-weight: 600; color: #343a40; display: inline-block; min-width: 110px; }
    .policy-item { position: relative; padding-left: 20px; }
    .doc a { color: #007bff; text-decoration: underline; }
    .doc a:hover { color: #0056b3; }
    .btn-add-to-cart {
        padding: 12px 30px; font-size: 1.1rem; font-weight: 500; border-radius: 50px;
        background: linear-gradient(135deg, #007bff, #0056b3); border: none; transition: all 0.3s ease;
    }
    .btn-add-to-cart:hover { background: linear-gradient(135deg, #0056b3, #003d80); transform: translateY(-2px); box-shadow: 0 5px 15px rgba(0,123,255,0.3); }
    .update-time { font-style: italic; color: #6c757d; }

    /* INTERNAL-LINK BLOCKS */
    .internal-link-block {
        border-left: 4px solid currentColor; background-color: rgba(13, 110, 253, 0.06);
        border-radius: 6px; transition: transform 0.2s ease, box-shadow 0.2s ease; scroll-margin-top: 90px;
    }
    .internal-link-block:hover { transform: translateX(3px); box-shadow: 0 2px 8px rgba(0,0,0,0.08); }
    .internal-link-block.alert-warning { background-color: #fffbeb; border-left: 4px solid #f59e0b; color: #78350f; }
    .internal-link-block.alert-primary { background-color: rgba(13, 110, 253, 0.08); }
    .internal-link-block.alert-info { background-color: rgba(13, 202, 240, 0.08); }
    .internal-link-block a { color: inherit; border-bottom: 1px dashed currentColor; }
    .internal-link-block a:hover { border-bottom-style: solid; opacity: 0.85; }
    .internal-link-block .attr-links-list { display: flex; flex-wrap: wrap; gap: 6px 14px; }
    .internal-link-block .attr-link-item { position: relative; padding-left: 14px; font-size: 0.875rem; line-height: 1.5; }
    .internal-link-block .attr-link-item::before { content: '›'; position: absolute; left: 0; top: 0; color: #b45309; font-weight: 700; }
    .internal-link-block .attr-link-item a { color: #92400e; border-bottom: 1px dashed transparent; }
    .internal-link-block .attr-link-item a:hover { color: #78350f; border-bottom-color: #78350f; }
    @media (max-width: 576px) { .internal-link-block .attr-links-list { flex-direction: column; gap: 4px; } }

    /* RATING & TOC */
    .rating-section-modern { margin-top: 40px; padding-top: 30px; border-top: 1px solid #e9ecef; }
    .rating-card {
        display: flex; align-items: center; background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
        border-radius: 16px; padding: 30px; box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
        border: 1px solid #eef0f2; transition: all 0.3s ease;
    }
    .rating-card:hover { box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1); transform: translateY(-2px); }
    .rating-score-area { flex: 0 0 auto; padding-right: 40px; border-right: 2px solid #f0f0f0; text-align: center; min-width: 150px; }
    .rating-big-score { margin-bottom: 8px; }
    .score-number { font-size: 3.5rem; font-weight: 700; color: #2c3e50; line-height: 1; }
    .score-divider { font-size: 1.5rem; color: #adb5bd; margin: 0 2px; }
    .score-total { font-size: 1.5rem; color: #6c757d; }
    .rating-stars-static { display: flex; justify-content: center; gap: 3px; margin-bottom: 8px; }
    .rating-count-text { font-size: 0.9rem; color: #6c757d; }
    .rating-count-text span { font-weight: 600; color: #495057; }
    .rating-interact-area { flex: 1; padding-left: 40px; }
    .rating-prompt { font-size: 1rem; color: #495057; margin-bottom: 15px; font-weight: 500; }
    .star-rating-live { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; }
    .star-item { display: flex; flex-direction: column; align-items: center; cursor: pointer; transition: all 0.25s; position: relative; }
    .star-item:hover { transform: translateY(-6px); }
    .star-item:active { transform: scale(0.95); }
    .star-live { display: block; transition: all 0.3s ease; filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1)); }
    .star-item.active .star-live path { fill: #FFB800; stroke: #F59E00; }
    .star-item.hover .star-live path { fill: #FFD54F; stroke: #FFB800; }
    .star-item:not(.active):not(.hover) .star-live path { fill: #E8E8E8; stroke: #D0D0D0; }
    .star-item .star-label { font-size: 0.75rem; font-weight: 600; color: #adb5bd; margin-top: 4px; }
    .star-item.active .star-label, .star-item.hover .star-label { color: #F59E00; }
    .rating-message { font-size: 0.9rem; min-height: 24px; margin-top: 10px; font-weight: 500; }
    .rating-message.success { color: #10B981; } .rating-message.loading { color: #6B7280; }
    .rating-message.error { color: #EF4444; } .rating-message.info { color: #6366F1; }
    
    .toc-container {
        position: fixed; top: 120px; right: 20px; width: 280px; max-height: 70vh; overflow-y: auto;
        background: #fff; padding: 20px; border-radius: 12px; box-shadow: 0 4px 20px rgba(0,0,0,0.12);
        border: 1px solid #e9ecef; z-index: 1000; transition: all 0.3s ease;
    }
    .toc-title { font-size: 1.1rem; font-weight: 700; color: #2c3e50; margin-bottom: 15px; padding-bottom: 12px; border-bottom: 2px solid #3498db; position: relative; }
    .toc-title::after { content: ''; position: absolute; bottom: -2px; left: 0; width: 50px; height: 2px; background: #e74c3c; }
    .toc-list { list-style-type: none; padding-left: 0; margin: 0; }
    .toc-list li { margin: 8px 0; line-height: 1.4; transition: all 0.2s ease; }
    .toc-list li:hover { transform: translateX(3px); }
    .toc-list a { text-decoration: none; display: block; padding: 6px 0; color: #555; font-size: 0.9rem; border-radius: 4px; padding-left: 8px; margin-left: -8px; }
    .toc-list a:hover { color: #2980b9; background: rgba(52, 152, 219, 0.08); padding-left: 12px; }
    .toc-list .toc-h1 { font-weight: 600; border-left: 3px solid #3498db; }
    .toc-list .toc-h2 { padding-left: 12px; border-left: 2px solid #27ae60; font-size: 0.95rem; }
    .toc-list .toc-h3 { padding-left: 24px; border-left: 1px solid #e67e22; font-size: 0.9rem; }
    .toc-list .toc-active a { color: #e74c3c; font-weight: 600; background: rgba(231, 76, 60, 0.1); padding-left: 12px; border-left-color: #e74c3c !important; }
    @media (max-width: 1200px) {
        .toc-container { position: static; width: 100%; max-height: none; margin: 2rem 0; box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08); }
        .toc-title { text-align: center; font-size: 1.3rem; } .toc-title::after { left: 50%; transform: translateX(-50%); }
    }
    @media (max-width: 992px) {
        .rating-card { flex-direction: column; text-align: center; padding: 25px 20px; }
        .rating-score-area { border-right: none; border-bottom: 2px solid #f0f0f0; padding-right: 0; padding-bottom: 20px; margin-bottom: 20px; }
        .rating-interact-area { padding-left: 0; } .star-rating-live { justify-content: center; }
    }
    /* ===== YouTube Facade (lazy load) ===== */
    .youtube-facade {
        position: relative;
        cursor: pointer;
        background: #000;
        aspect-ratio: 16 / 9;
        display: flex;
        align-items: center;
        justify-content: center;
        overflow: hidden;
        width: 100%;
    }
    .youtube-facade img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        display: block;
    }
    .youtube-facade .youtube-play-btn {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        transition: transform 0.2s;
        pointer-events: none;
    }
    .youtube-facade:hover .youtube-play-btn {
        transform: translate(-50%, -50%) scale(1.1);
    }
    .youtube-facade iframe {
        position: absolute;
        inset: 0;
        width: 100%;
        height: 100%;
        border: 0;
    }