:root {
            --primary: #FF1E27;       /* Đỏ rực rỡ làm chủ đạo chính */
            --primary-glow: rgba(255, 30, 39, 0.25);
            --secondary: #0D6EFD;     /* Xanh công nghệ tạo điểm nhấn */
            --dark: #0A0A0B;          /* Đen tuyền sang trọng làm nền */
            --dark-gray: #121214;     /* Màu xám tối cho các thẻ/khối nền */
            --light-gray: #F8F9FA;    /* Trắng xám sang trọng */
            --border-color: rgba(255, 255, 255, 0.08);
            --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
            --font-display: 'Montserrat', sans-serif;
            --font-body: 'Plus Jakarta Sans', sans-serif;
        }

        /* Tối ưu hóa thanh cuộn của trình duyệt */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--dark);
        }
        ::-webkit-scrollbar-thumb {
            background: #252529;
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--primary);
        }

        /* Reset mặc định */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            outline: none;
        }

        body {
            font-family: var(--font-body);
            background-color: var(--dark);
            color: #E2E8F0;
            overflow-x: hidden;
            line-height: 1.6;
        }

        html {
            scroll-behavior: smooth;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

        /* Khối nền mờ ảo chuyển động chậm tăng chiều sâu đồ họa */
        .glow-blob {
            position: absolute;
            width: 450px;
            height: 450px;
            background: radial-gradient(circle, rgba(255, 30, 39, 0.12) 0%, rgba(0, 0, 0, 0) 70%);
            border-radius: 50%;
            filter: blur(70px);
            z-index: 0;
            pointer-events: none;
            animation: floatGlow 12s infinite alternate ease-in-out;
        }

        .glow-blob-blue {
            background: radial-gradient(circle, rgba(13, 110, 253, 0.08) 0%, rgba(0, 0, 0, 0) 70%);
            animation-delay: -4s;
        }

        @keyframes floatGlow {
            0% { transform: translate(0, 0) scale(1); }
            50% { transform: translate(40px, 60px) scale(1.1); }
            100% { transform: translate(-20px, -30px) scale(0.95); }
        }

        header {
            background: rgba(10, 10, 11, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            position: fixed;
            width: 100%;
            top: 0;
            left: 0;
            z-index: 1000;
            transition: var(--transition-smooth);
        }

        header.scrolled {
            padding: 5px 0;
            background: rgba(10, 10, 11, 0.95);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
        }

.navbar {
    display: flex;
    justify-content: flex-start; /* Giữ flex-start để dễ căn chỉnh tỉ lệ */
    align-items: center;
    padding: 15px 5%;
    max-width: 1400px;
    font-size: 14px; 
    margin: 0 auto;
}

.logo {
    font-family: var(--font-display);
    font-size: 22px;
    font-weight: 800;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 10px;
    color: #ffffff;
    
    /* CHUẨN: Tự động tạo khoảng trống lớn đẩy cụm Menu và nút Gọi Ngay về bên phải */
    margin-right: auto; 
}

.logo i {
    color: var(--primary);
    text-shadow: 0 0 15px rgba(255, 30, 39, 0.6);
    animation: pulseIcon 2s infinite;
}

.logo span {
    color: var(--primary);
}

.logo-dot {
    width: 6px;
    height: 6px;
    background-color: var(--secondary);
    border-radius: 50%;
    display: inline-block;
}

@keyframes pulseIcon {
    0% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.08); opacity: 0.9; }
    100% { transform: scale(1); opacity: 1; }
}

/* ĐÃ SỬA CHUẨN: Áp dụng khoảng cách cho cụm menu thực tế của anh */
.nav-links {
    display: flex;
    list-style: none;
    
    /* KHOẢNG CÁCH CHỮ GẦN NHAU: Thu hẹp khoảng cách giữa các mục menu (Trang chủ, Chất liệu...) */
    gap: 10px; 
    
    /* ĐẨY THÊM NÚT GỌI NGAY: Giúp cụm menu nằm ở giữa, đẩy nút Gọi Ngay sát về góc phải */
    margin-right: auto; 
}

.nav-links li a {
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 13.5px;
    text-transform: uppercase;
    
    /* CHỮ SÁT NHAU HƠN: Thu hẹp khoảng cách ký tự trong từng chữ nếu anh muốn */
    letter-spacing: -0.2px; 
    
    padding: 8px 16px;
    border-radius: 30px;
    transition: var(--transition-smooth);
    color: #CBD5E1;
    border: 1px solid transparent;
    white-space: nowrap; /* Giữ chữ luôn trên 1 dòng */
}

.nav-links li a:hover, .nav-links li a.active {
    color: #ffffff;
    background: rgba(255, 30, 39, 0.1);
    border: 1px solid rgba(255, 30, 39, 0.2);
}
        .nav-cta-btn {
            background: linear-gradient(135deg, var(--primary), #D60E16);
            color: white;
            padding: 10px 24px;
            border-radius: 50px;
            font-weight: 700;
            text-transform: uppercase;
            font-size: 13px;
            letter-spacing: 1px;
            box-shadow: 0 5px 15px rgba(255, 30, 39, 0.3);
            transition: var(--transition-smooth);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .nav-cta-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(255, 30, 39, 0.5);
            background: linear-gradient(135deg, #FF3D44, var(--primary));
        }

        /* Nút Hamburger cho di động */
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 6px;
            cursor: pointer;
            z-index: 1100;
            padding: 5px;
        }

        .menu-toggle .bar {
            width: 28px;
            height: 3px;
            background-color: white;
            border-radius: 3px;
            transition: var(--transition-smooth);
        }

        /* Lớp nền tối mờ khi mở Menu Mobile */
        .menu-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.7);
            backdrop-filter: blur(8px);
            z-index: 999;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition-smooth);
        }

        .menu-overlay.active {
            opacity: 1;
            visibility: visible;
        }

        .hero {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 130px 5% 70px;
            background: radial-gradient(circle at top right, rgba(255, 30, 39, 0.08) 0%, rgba(10, 10, 11, 1) 75%);
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(0,0,0,0.4) 1px, transparent 1px), linear-gradient(90deg, rgba(0,0,0,0.4) 1px, transparent 1px);
            background-size: 40px 40px;
            opacity: 0.15;
            pointer-events: none;
        }

        .hero-container {
            max-width: 1400px;
            width: 100%;
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            gap: 40px;
            align-items: center;
            position: relative;
            z-index: 2;
        }

        .hero-text {
            animation: slideInLeft 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
        }

        .hero-tagline {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: rgba(255, 30, 39, 0.08);
            border: 1px solid rgba(255, 30, 39, 0.2);
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 700;
            color: #FF5259;
            text-transform: uppercase;
            margin-bottom: 25px;
            letter-spacing: 1px;
        }

        .hero-tagline i {
            animation: rotateFast 5s linear infinite;
        }

        @keyframes rotateFast {
            100% { transform: rotate(360deg); }
        }

        .hero h1 {
            font-family: var(--font-display);
            font-size: clamp(1.8rem, 4.5vw, 3.8rem); /* Tối ưu hóa clamp tránh vỡ chữ mobile nhỏ */
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 20px;
            color: white;
        }

        .hero h1 span {
            background: linear-gradient(135deg, #FFF, #C5C9D6);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero h1 .gradient-red {
            background: linear-gradient(135deg, var(--primary), #FF5259);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            display: inline-block;
        }

        .hero p {
            font-size: clamp(0.95rem, 1.1vw, 1.15rem);
            color: #94A3B8;
            margin-bottom: 35px;
            max-width: 600px;
        }

        .hero-cta-group {
            display: flex;
            gap: 15px;
            align-items: center;
            flex-wrap: wrap;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), #D60E16);
            color: white;
            padding: 15px 35px;
            font-family: var(--font-body);
            font-weight: 700;
            font-size: 15px;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(255, 30, 39, 0.35);
            transition: var(--transition-smooth);
            display: inline-flex;
            align-items: center;
            gap: 12px;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .btn-primary:hover {
            transform: translateY(-4px);
            box-shadow: 0 15px 40px rgba(255, 30, 39, 0.5);
            background: linear-gradient(135deg, #FF3D44, var(--primary));
        }

        .btn-outline {
            border: 1.5px solid rgba(255, 255, 255, 0.15);
            background: rgba(255, 255, 255, 0.03);
            color: white;
            padding: 14px 34px;
            font-family: var(--font-body);
            font-weight: 700;
            font-size: 15px;
            border-radius: 12px;
            transition: var(--transition-smooth);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: white;
            transform: translateY(-3px);
            color: var(--primary);
        }

        .hero-visual {
            position: relative;
            display: flex;
            justify-content: center;
            align-items: center;
            animation: slideInRight 1.2s cubic-bezier(0.16, 1, 0.3, 1) forwards;
        }

        .hero-image-wrapper {
            position: relative;
            width: 100%;
            max-width: 480px;
            border-radius: 24px;
            padding: 8px;
            background: linear-gradient(135deg, rgba(255, 30, 39, 0.3), rgba(13, 110, 253, 0.2));
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.8);
            overflow: hidden;
            aspect-ratio: 1/1;
        }

        .hero-image-wrapper img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 18px;
        }

        /* Thẻ trạng thái nổi dập dềnh */
.floating-badge {
    position: absolute;
    bottom: 25px;
    left: -15px;
    /* CHỈNH SỬA: Hạ độ mờ nền xuống 0.55 để nhìn xuyên thấu trong suốt */
    background: rgba(18, 18, 20, 0.15); 
    
    /* Tăng độ nhòe hiệu ứng kính mờ (Glassmorphism) */
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
    
    /* Chỉnh lại viền sáng nhẹ để tăng cảm giác nổi khối */
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-left: 4px solid var(--primary);
    
    padding: 15px 22px;
    border-radius: 16px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
    display: flex;
    align-items: center;
    gap: 12px;
    animation: floatUpDown 4s ease-in-out infinite;
    
    /* Đảm bảo badge luôn nổi lên trên cùng, không bị đè */
    z-index: 10; 
}

.floating-badge i {
    font-size: 24px;
    color: var(--primary);
}

.floating-badge h4 {
    font-size: 18px;
    font-weight: 800;
    color: white;
    margin: 0; /* Xóa margin mặc định nếu chữ bị lệch */
}

.floating-badge p {
    font-size: 12px;
    color: #cbd5e1; /* Chỉnh chữ mô tả sáng hơn một chút để dễ đọc trên nền mờ */
    margin: 0;
}

        @keyframes floatUpDown {
            0% { transform: translateY(0px); }
            50% { transform: translateY(-12px); }
            100% { transform: translateY(0px); }
        }

        @keyframes slideInLeft {
            from { opacity: 0; transform: translateX(-60px); }
            to { opacity: 1; transform: translateX(0); }
        }

        @keyframes slideInRight {
            from { opacity: 0; transform: translateX(60px); }
            to { opacity: 1; transform: translateX(0); }
        }

        .features-bar {
            background-color: var(--dark-gray);
            border-top: 1px solid var(--border-color); /* Đã sửa lỗi cú pháp border-y thành chuẩn CSS */
            border-bottom: 1px solid var(--border-color);
            padding: 35px 5%;
            position: relative;
            z-index: 2;
        }

        .features-grid {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 25px;
        }

        .feature-item {
            display: flex;
            align-items: center;
            gap: 18px;
            padding: 8px;
        }

        .feature-icon {
            width: 54px;
            height: 54px;
            border-radius: 14px;
            background: rgba(255, 30, 39, 0.08);
            border: 1px solid rgba(255, 30, 39, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 20px;
            flex-shrink: 0;
            transition: var(--transition-smooth);
        }

        .feature-item:hover .feature-icon {
            background: var(--primary);
            color: white;
            box-shadow: 0 0 15px rgba(255, 30, 39, 0.4);
            transform: scale(1.05);
        }

        .feature-text h3 {
            font-size: 15px;
            font-weight: 700;
            color: white;
            margin-bottom: 2px;
        }

        .feature-text p {
            font-size: 12.5px;
            color: #94A3B8;
        }

        .seo-intro-section {
            padding: 90px 5%;
            position: relative;
            z-index: 2;
        }

        .seo-container {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 0.85fr 1.15fr;
            gap: 50px;
            align-items: center;
        }

        .sub-title {
            color: var(--primary);
            font-family: var(--font-display);
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 2px;
            font-size: 13px;
            margin-bottom: 15px;
            display: block;
        }

        .seo-headline h2 {
            font-family: var(--font-display);
            font-size: clamp(1.8rem, 2.8vw, 2.5rem);
            font-weight: 800;
            line-height: 1.25;
            color: white;
        }

        .seo-headline h2 span {
            color: var(--primary);
        }

        .seo-content {
            background: var(--dark-gray);
            border: 1px solid var(--border-color);
            padding: 40px;
            border-radius: 20px;
            border-left: 4px solid var(--primary);
            box-shadow: 0 15px 35px rgba(0,0,0,0.3);
        }

        .seo-content h3 {
            font-size: 18px;
            font-weight: 700;
            color: white;
            margin-bottom: 12px;
        }

        .seo-content p {
            color: #94A3B8;
            font-size: 14.5px;
            line-height: 1.75;
            margin-bottom: 18px;
        }

        .seo-content strong {
            color: white;
            font-weight: 600;
        }

        .highlight-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 15px;
            margin-top: 25px;
        }

        .highlight-box {
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid rgba(255, 255, 255, 0.04);
            padding: 15px;
            border-radius: 12px;
        }

        .highlight-box h5 {
            font-size: 13.5px;
            color: white;
            margin-bottom: 5px;
            font-weight: 700;
        }

        .highlight-box p {
            font-size: 12px;
            margin: 0;
            line-height: 1.5;
        }

        .showroom-section {
            padding: 80px 5%;
            background-color: var(--dark-gray);
            position: relative;
            z-index: 2;
        }

        .section-header {
            text-align: center;
            max-width: 800px;
            margin: 0 auto 50px;
        }

        .section-header h2 {
            font-family: var(--font-display);
            font-size: clamp(1.8rem, 2.6vw, 2.4rem);
            font-weight: 800;
            color: white;
            margin-bottom: 15px;
        }

        .section-header h2 span {
            color: var(--primary);
        }

        .section-header p {
            color: #94A3B8;
            font-size: 15px;
        }

        .filter-tabs {
            display: flex;
            justify-content: center;
            gap: 10px;
            margin-bottom: 35px;
            flex-wrap: wrap;
        }

        .tab-btn {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border-color);
            color: #94A3B8;
            padding: 8px 20px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 13.5px;
            cursor: pointer;
            transition: var(--transition-smooth);
        }

        .tab-btn:hover, .tab-btn.active {
            background: var(--primary);
            color: white;
            border-color: var(--primary);
            box-shadow: 0 5px 12px rgba(255, 30, 39, 0.3);
        }

        /* Bố cục lưới hoàn hảo 4 Cột x 4 Hàng */
        .showroom-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 22px;
            max-width: 1400px;
            margin: 0 auto;
        }

        .reveal-node {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
        }

        .reveal-node.revealed {
            opacity: 1;
            transform: translateY(0);
        }

        .prod-card {
            background: var(--dark);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: var(--transition-smooth);
            position: relative;
        }

        .prod-card:hover {
            transform: translateY(-8px);
            border-color: rgba(255, 30, 39, 0.3);
            box-shadow: 0 12px 30px rgba(255, 30, 39, 0.15);
        }

        .prod-img-box {
            position: relative;
            height: 180px;
            width: 100%;
            overflow: hidden;
            background-color: #16161a;
        }

        .prod-img-box img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition-smooth);
        }

        .prod-card:hover .prod-img-box img {
            transform: scale(1.08);
        }

        .prod-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(10, 10, 11, 0.8);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            color: #FF5259;
            padding: 4px 10px;
            font-size: 10px;
            font-weight: 700;
            text-transform: uppercase;
            border-radius: 30px;
            z-index: 2;
        }

        .prod-info {
            padding: 20px;
            display: flex;
            flex-direction: column;
            flex-grow: 1;
            border-top: 1px solid var(--border-color);
        }

        .prod-info h4 {
            font-size: 16px;
            font-weight: 700;
            color: white;
            margin-bottom: 8px;
            transition: var(--transition-smooth);
        }

        .prod-card:hover .prod-info h4 {
            color: var(--primary);
        }

        .prod-info p {
            font-size: 13px;
            color: #94A3B8;
            line-height: 1.55;
            margin-bottom: 15px;
            flex-grow: 1;
        }

        .prod-footer {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 12px;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }

        .prod-price {
            font-size: 11px;
            color: #94A3B8;
        }

        .prod-price span {
            display: block;
            font-size: 14px;
            font-weight: 700;
            color: var(--primary);
        }

        .btn-card {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            cursor: pointer;
            transition: var(--transition-smooth);
        }

        .prod-card:hover .btn-card {
            background-color: var(--primary);
            border-color: var(--primary);
            box-shadow: 0 0 10px rgba(255, 30, 39, 0.4);
        }

        .details-section {
            padding: 90px 5%;
            position: relative;
            z-index: 2;
        }

        .details-grid {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 35px;
        }

        .details-block {
            background: var(--dark-gray);
            border: 1px solid var(--border-color);
            border-radius: 20px;
            padding: 35px;
            box-shadow: 0 15px 35px rgba(0,0,0,0.3);
        }

        .details-block h3 {
            font-family: var(--font-display);
            font-size: 20px;
            font-weight: 700;
            color: white;
            margin-bottom: 25px;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .details-block h3 i {
            color: var(--primary);
        }

        .item-list-row {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .item-list-unit {
            display: flex;
            gap: 12px;
            align-items: flex-start;
        }

        .item-list-icon {
            width: 22px;
            height: 22px;
            border-radius: 50%;
            background-color: rgba(255, 30, 39, 0.1);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 10px;
            flex-shrink: 0;
            margin-top: 3px;
        }

        .item-list-desc h4 {
            font-size: 15px;
            font-weight: 600;
            color: white;
            margin-bottom: 3px;
        }

        .item-list-desc p {
            font-size: 13px;
            color: #94A3B8;
        }

        .video-section {
            padding: 90px 5%;
            background-color: var(--dark-gray);
            position: relative;
            z-index: 2;
        }

        .channel-info-bar {
            background: rgba(255, 30, 39, 0.05);
            border: 1.5px dashed rgba(255, 30, 39, 0.25);
            border-radius: 16px;
            padding: 20px 30px;
            max-width: 1400px;
            margin: -20px auto 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 20px;
        }

        .channel-id-text {
            font-size: 14px;
            color: #E2E8F0;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .channel-id-text strong {
            color: var(--primary);
            background: rgba(0, 0, 0, 0.3);
            padding: 4px 12px;
            border-radius: 6px;
            font-family: monospace;
            border: 1px solid rgba(255,255,255,0.05);
        }

        .channel-sub-btn {
            background-color: #FF0000;
            color: white;
            font-weight: 700;
            font-size: 13px;
            text-transform: uppercase;
            padding: 10px 22px;
            border-radius: 30px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition-smooth);
            box-shadow: 0 4px 15px rgba(255, 0, 0, 0.35);
        }

        .channel-sub-btn:hover {
            transform: translateY(-2px);
            background-color: #CC0000;
            box-shadow: 0 6px 20px rgba(255, 0, 0, 0.5);
        }

        /* Thiết kế Slider chuyển video hàng ngang */
        .slider-viewport-container {
            max-width: 1400px;
            margin: 0 auto;
            position: relative;
            padding: 0 45px;
        }

        .slider-outer {
            overflow: hidden;
            width: 100%;
            border-radius: 20px;
        }

        .slider-inner {
            display: flex;
            transition: transform 0.6s cubic-bezier(0.25, 1, 0.5, 1);
            width: 200%; /* ĐÃ SỬA: Tăng chiều rộng để chứa đủ các phần tử con dạng Flex */
        }

        .slider-slide {
            flex: 0 0 25%; /* ĐÃ SỬA: Đồng bộ hoá 25% dựa trên width 200% của phần tử cha để giữ đúng tỉ lệ 1/2 trên desktop */
            padding: 10px;
            min-width: 0;
        }

        .video-box {
            position: relative;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 20px 45px rgba(0,0,0,0.5);
            background: var(--dark);
            border: 1px solid var(--border-color);
            padding: 10px;
            transition: var(--transition-smooth);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .video-box:hover {
            transform: translateY(-5px);
            border-color: rgba(255, 30, 39, 0.25);
        }

        .video-inner {
            position: relative;
            padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
            height: 0;
            border-radius: 12px;
            overflow: hidden;
        }

        .video-inner iframe {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            border: none;
        }

        .video-label {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 5px 5px;
            color: white;
            margin-top: auto;
        }

        .video-label h5 {
            font-size: 14px;
            font-weight: 700;
            color: #F1F5F9;
        }

        .video-label a {
            font-size: 11px;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 5px;
        }

        .video-label a:hover {
            text-decoration: underline;
        }
.video-responsive {
    position: relative;
    padding-bottom: 56.25%; /* Tỷ lệ chuẩn 16:9 */
    height: 0;
    overflow: hidden;
    margin-bottom: 20px;
}
.video-responsive iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}
        /* Nút lướt ngang (Prev/Next) */
        .slider-control-btn {
            position: absolute;
            top: 50%;
            transform: translateY(-50%);
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: rgba(18, 18, 20, 0.9);
            border: 1px solid var(--border-color);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            z-index: 10;
            transition: var(--transition-smooth);
        }

        .slider-control-btn:hover {
            background: var(--primary);
            border-color: var(--primary);
            box-shadow: 0 0 15px rgba(255, 30, 39, 0.4);
            color: white;
        }

        .slider-control-btn.prev-btn {
            left: -5px;
        }

        .slider-control-btn.next-btn {
            right: -5px;
        }

        /* Trực quan hóa các chấm tròn chỉ định vị trí */
        .slider-indicators {
            display: flex;
            justify-content: center;
            gap: 8px;
            margin-top: 25px;
        }

        .indicator-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: rgba(255, 255, 255, 0.15);
            cursor: pointer;
            transition: var(--transition-smooth);
        }

        .indicator-dot.active {
            background-color: var(--primary);
            width: 20px;
            border-radius: 10px;
        }

        footer {
            background-color: var(--dark);
            border-top: 1px solid var(--border-color);
            padding: 70px 5% 30px;
            position: relative;
            z-index: 2;
        }

        .footer-grid {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 1.2fr 0.8fr 0.8fr 1.2fr;
            gap: 35px;
            margin-bottom: 50px;
        }

        .footer-col h4 {
            font-family: var(--font-display);
            font-size: 16px;
            font-weight: 700;
            color: white;
            margin-bottom: 22px;
            position: relative;
        }

        .footer-col h4::after {
            content: '';
            width: 30px;
            height: 2px;
            background-color: var(--primary);
            position: absolute;
            bottom: -8px;
            left: 0;
        }

        .footer-col p {
            font-size: 13px;
            color: #94A3B8;
            line-height: 1.7;
            margin-bottom: 15px;
        }

        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links li a {
            font-size: 13.5px;
            color: #94A3B8;
            transition: var(--transition-smooth);
            display: inline-block;
        }

        .footer-links li a:hover {
            color: var(--primary);
            transform: translateX(5px);
        }

        .social-row {
            display: flex;
            gap: 10px;
        }

        .social-icon {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background-color: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 15px;
            transition: var(--transition-smooth);
        }

        .social-icon:hover {
            background-color: var(--primary);
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 5px 12px rgba(255, 30, 39, 0.4);
        }

        /* Nút cuộn ngược lên đầu trang (Back to Top) */
        .back-to-top {
            position: fixed;
            bottom: 30px;
            left: 30px; /* Chuyển sang bên trái để tránh đè cụm liên hệ nổi bên phải */
            width: 46px;
            height: 46px;
            background-color: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 16px;
            cursor: pointer;
            box-shadow: 0 10px 25px rgba(255, 30, 39, 0.35);
            z-index: 99;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition-smooth);
        }

        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
        }

        .back-to-top:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(255, 30, 39, 0.5);
            background-color: #D60E16;
        }

        .footer-bottom {
            max-width: 1400px;
            margin: 0 auto;
            border-top: 1px solid var(--border-color);
            padding-top: 25px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
            font-size: 12.5px;
            color: #64748B;
        }

        .floating-contact-box {
            position: fixed;
            bottom: 30px;
            right: 30px;
            display: flex;
            flex-direction: column;
            gap: 15px;
            z-index: 999;
        }

        .contact-icon-btn {
            width: 54px;
            height: 54px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 22px;
            position: relative;
            box-shadow: 0 10px 25px rgba(0,0,0,0.3);
            transition: var(--transition-smooth);
            cursor: pointer;
        }

        .contact-icon-btn:hover {
            transform: scale(1.1) rotate(5deg);
        }

        /* Hiển thị tooltip dạng bóng bóng chữ khi hover */
        .contact-icon-btn::before {
            content: attr(data-tooltip);
            position: absolute;
            right: 70px;
            background-color: #121214;
            border: 1px solid var(--border-color);
            color: white;
            padding: 6px 14px;
            border-radius: 8px;
            font-size: 12px;
            font-weight: 700;
            white-space: nowrap;
            opacity: 0;
            visibility: hidden;
            transform: translateX(10px);
            transition: var(--transition-smooth);
            pointer-events: none;
            box-shadow: 0 8px 20px rgba(0,0,0,0.4);
        }

        .contact-icon-btn:hover::before {
            opacity: 1;
            visibility: visible;
            transform: translateX(0);
        }

        /* Nút gọi điện (Đỏ - Nhấp nháy sóng) */
        .btn-call-float {
            background: linear-gradient(135deg, #FF1E27, #D60E16);
        }

        .btn-call-float::after {
            content: '';
            position: absolute;
            inset: -5px;
            border-radius: 50%;
            border: 2px solid #FF1E27;
            opacity: 0.8;
            animation: pulseWave 1.8s infinite;
            z-index: -1;
        }

        /* Nút Zalo (Xanh nước biển nhạt) */
        .btn-zalo-float {
            background: linear-gradient(135deg, #0068FF, #0053CD);
        }

        .btn-zalo-float svg {
            width: 28px;
            height: 28px;
            fill: white;
        }

        .btn-zalo-float::after {
            content: '';
            position: absolute;
            inset: -5px;
            border-radius: 50%;
            border: 2px solid #0068FF;
            opacity: 0.8;
            animation: pulseWave 1.8s infinite;
            animation-delay: 0.6s;
            z-index: -1;
        }

        /* Nút Messenger (Gradient đặc trưng) */
        .btn-msg-float {
            background: radial-gradient(circle at bottom left, #00C6FF 0%, #0072FF 50%, #B500FF 100%);
        }

        .btn-msg-float::after {
            content: '';
            position: absolute;
            inset: -5px;
            border-radius: 50%;
            border: 2px solid #00C6FF;
            opacity: 0.8;
            animation: pulseWave 1.8s infinite;
            animation-delay: 1.2s;
            z-index: -1;
        }

        @keyframes pulseWave {
            0% { transform: scale(1); opacity: 0.8; }
            100% { transform: scale(1.4); opacity: 0; }
        }

@media (max-width: 1200px) {
            .showroom-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            
            /* SỬA LỖI TRÀN MENU CHO LAPTOP NHỎ / MÀN HÌNH LỚN */
            .nav-links a {
                font-size: 13px !important;
                white-space: nowrap !important; /* Ép chữ "VỀ CHÚNG TÔI" luôn nằm trên 1 hàng */
            }
            .nav-links li {
                padding: 0 6px !important; /* Thu nhỏ khoảng cách giữa các mục menu PC */
            }
        }

        /* ĐÃ SỬA: Chuyển mốc 992px thành 1024px để xử lý triệt để lỗi hiển thị trên iPad */
        @media (max-width: 1024px) {
            /* Kích hoạt nút 3 gạch (hamburger) và cấu hình menu trượt sớm hơn trên iPad */
            .menu-toggle {
                display: flex !important;
            }

            .nav-links {
                position: fixed;
                top: 0px;
                right: 0px;
                width: 75%;
                max-width: 320px;
                height: calc(100vh - 40px);
                padding: 60px 30px 40px;
                background: rgba(10, 10, 11, 0.72);
                backdrop-filter: blur(25px);
                -webkit-backdrop-filter: blur(25px);
                display: flex;
                flex-direction: column;
                justify-content: flex-start;
                align-items: flex-start;
                gap: 16px; /* Tăng khoảng cách dòng khi menu xếp dọc trên iPad/Mobile */
                transform: translateX(120%);
                transition: 0.5s ease;
                border: 2px solid rgba(255, 0, 0, 0.18);
                border-radius: 10px;
                box-shadow: 0 0 25px rgba(255,0,0,0.08), 0 20px 60px rgba(0,0,0,0.65);
                overflow-y: auto;
            }

            /* Sửa size chữ menu khi đã thu gọn vào thanh trượt */
            .nav-links a {
                font-size: 16px !important;
                white-space: nowrap !important;
            }

            /* Hiển thị menu khi có class active */
            .nav-links.active {
                transform: translateX(0);
            }

            .navbar .nav-cta-btn {
                display: none; /* Giảm bớt nút rối mắt trên thanh menu mobile */
            }

            /* Giữ nguyên các cấu hình Grid hiện tại của anh */
            .hero-container {
                grid-template-columns: 1fr;
                text-align: center;
                gap: 40px;
            }
            .hero-text {
                display: flex;
                flex-direction: column;
                align-items: center;
            }
            .hero-cta-group {
                justify-content: center;
            }
            .floating-badge {
                left: 10px;
            }
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .seo-container {
                grid-template-columns: 1fr;
            }
            .showroom-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .details-grid {
                grid-template-columns: 1fr;
            }
            .slider-inner {
                width: 400%; /* Cấu hình lại chiều rộng tỷ lệ thuận khi đổi sang hiển thị 1 clip trên mobile */
            }
            .slider-slide {
                flex: 0 0 25%; /* Đảm bảo phần tử chiếm 1/4 của cha (tức bằng 100% của viewport slider) */
            }
        }

        /* MỐC MOBILE (DƯỚI 768px): Chỉ giữ lại các tùy biến dành riêng cho di động nhỏ */
        @media (max-width: 768px) {
            .navbar {
                padding: 12px 5%;
            }
            
            /* Tạo cấu hình nút X từ hamburger */
            .menu-toggle.active .bar:nth-child(1) {
                transform: translateY(9px) rotate(45deg);
                background-color: var(--primary);
            }
            .menu-toggle.active .bar:nth-child(2) {
                opacity: 0;
            }
            .menu-toggle.active .bar:nth-child(3) {
                transform: translateY(-9px) rotate(-45deg);
                background-color: var(--primary);
            }

            .features-grid {
                grid-template-columns: 1fr;
            }
            .showroom-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .slider-viewport-container {
                padding: 0 20px;
            }
            .slider-control-btn {
                width: 36px;
                height: 36px;
                font-size: 14px;
            }
            .slider-control-btn.prev-btn { left: -10px; }
            .slider-control-btn.next-btn { right: -10px; }
            .floating-contact-box {
                bottom: 20px;
                right: 20px;
                gap: 10px;
            }
            .contact-icon-btn {
                width: 48px;
                height: 48px;
                font-size: 18px;
            }
            .btn-zalo-float svg {
                width: 24px;
                height: 24px;
            }
            .back-to-top {
                bottom: 20px;
                left: 20px;
                width: 40px;
                height: 40px;
                font-size: 14px;
            }
        }
/* =========================
DROPDOWN
========================= */
/* ==========================================================================
   1. CẤU HÌNH TRÊN MÁY TÍNH (PC / LAPTOP > 768px)
   ========================================================================== */
.dropdown-container {
    position: relative;
}

.dropdown-container .fa-chevron-down {
    font-size: 10px;
    margin-left: 4px;
    transition: transform 0.3s ease;
}

/* Menu con trên PC: Nền mờ + Viền khung đỏ */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    
    /* Hiệu ứng nền mờ đổ bóng (Glassmorphism) */
    background-color: rgba(20, 20, 20, 0.75); /* Đen mờ 75% */
    backdrop-filter: blur(8px); /* Làm mờ phần background phía sau */
    -webkit-backdrop-filter: blur(8px);
    
    /* Viền khung màu đỏ */
    border: 1px solid #ff4757; 
    
    min-width: 210px;
    padding: 10px 0;
    border-radius: 6px;
    list-style: none;
    box-shadow: 0px 8px 32px rgba(255, 71, 87, 0.15); /* Đổ bóng ánh đỏ nhẹ */
    margin: 0;
    
    /* Trạng thái ẩn */
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease; 
    z-index: 999;
}

/* Vùng đệm giữ Hover */
.dropdown-container::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 0;
    width: 100%;
    height: 15px;
}

/* Hiệu ứng kích hoạt hiển thị khi rê chuột trên PC */
@media (min-width: 769px) {
    .dropdown-container:hover .dropdown-menu {
        opacity: 1;
        visibility: visible;
        transform: translateX(-50%) translateY(0);
    }
    .dropdown-container:hover .fa-chevron-down {
        transform: rotate(180deg);
    }
}

/* Định dạng các liên kết con */
.dropdown-menu li {
    width: 100%;
    display: block;
}
.dropdown-menu li a {
    display: block;
    padding: 10px 20px;
    color: #e0e0e0 !important;
    font-size: 14px;
    text-decoration: none;
    text-align: left;
    transition: all 0.2s ease;
}
.dropdown-menu li a:hover {
    background-color: #ff4757; /* Nền đỏ khi hover vào từng mục */
    color: #ffffff !important;
    padding-left: 25px;
}

/* ==========================================================================
   2. CẤU HÌNH TRÊN ĐIỆN THOẠI (MOBILE & TABLET <= 768px)
   ========================================================================== */
@media (max-width: 768px) {
    .dropdown-menu {
        position: relative;
        top: 0;
        left: 0;
        transform: none;
        
        /* BỎ TOÀN BỘ MÀU NỀN VÀ VIỀN TRÊN MOBILE */
        background-color: transparent !important;
        background: none !important;
        backdrop-filter: none !important;
        -webkit-backdrop-filter: none !important;
        border: none !important;
        box-shadow: none !important;
        
        min-width: 100%;
        padding: 0;
        margin-top: 5px;
        opacity: 1;
        visibility: visible;
        display: block; /* Hiện lồng trực tiếp gọn gàng */
    }

    /* Căn chỉnh lại chữ trên mobile cho thoáng và đẹp */
    .dropdown-menu li a {
        padding: 10px 0 10px 25px !important; /* Đẩy lùi lề trái để tạo phân cấp menu con */
        font-size: 14px;
        color: #b3b3b3 !important; /* Màu chữ nhẹ hơn menu chính một chút */
    }
    
    .dropdown-menu li a:hover {
        background-color: transparent !important; /* Không dùng nền hover trên mobile */
        color: #ff4757 !important; /* Đổi màu chữ sang đỏ khi chạm */
        padding-left: 25px;
    }

    .dropdown-container::after {
        display: none;
    }
}

/* =========================
   SEO CMS - Bài viết chất liệu
   Giữ tone đỏ / đen / kính mờ theo giao diện cũ
========================= */
body.article-page header,
body.admin-page header,
header.transparent-header {
    background: rgba(10, 10, 11, 0.62);
    backdrop-filter: blur(22px);
    -webkit-backdrop-filter: blur(22px);
}

.article-grid-shell {
    max-width: 1400px;
    margin: 0 auto;
    overflow: hidden;
    position: relative;
}

.article-slider-track {
    transition: transform .55s cubic-bezier(.16,1,.3,1), opacity .3s ease;
    will-change: transform, opacity;
}

.article-slider-track.slide-out-left { transform: translateX(-34px); opacity: 0; }
.article-slider-track.slide-out-right { transform: translateX(34px); opacity: 0; }
.article-slider-track.slide-in { animation: cmsSlideIn .52s cubic-bezier(.16,1,.3,1) both; }

@keyframes cmsSlideIn {
    from { transform: translateX(44px); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.showroom-grid.article-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    align-items: stretch;
}

.article-card-link { display: flex; height: 100%; }
.article-card-link .prod-card { width: 100%; }
.article-card-link:hover .prod-info h4 { color: var(--primary); }

.prod-meta {
    color: #64748b;
    font-size: 11px;
    margin-bottom: 8px;
    display: flex;
    gap: 8px;
    align-items: center;
    flex-wrap: wrap;
}

.prod-meta span {
    background: rgba(255,255,255,.035);
    border: 1px solid rgba(255,255,255,.055);
    border-radius: 999px;
    padding: 3px 8px;
}

.cms-pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-top: 34px;
    flex-wrap: wrap;
}

.cms-pagination a,
.cms-pagination span {
    min-width: 38px;
    height: 38px;
    padding: 0 13px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    border: 1px solid var(--border-color);
    color: #cbd5e1;
    background: rgba(255,255,255,.035);
    font-weight: 700;
    font-size: 13px;
    transition: var(--transition-smooth);
}

.cms-pagination a:hover,
.cms-pagination .active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
    box-shadow: 0 10px 26px rgba(255,30,39,.28);
}

.article-empty {
    grid-column: 1 / -1;
    padding: 35px;
    border: 1px dashed rgba(255,255,255,.18);
    border-radius: 18px;
    text-align: center;
    color: #94a3b8;
}

.article-wrap {
    max-width: 1040px;
    margin: 0 auto;
    padding: 145px 5% 80px;
    position: relative;
    z-index: 2;
}

.article-hero-box {
    background: rgba(18,18,20,.72);
    border: 1px solid var(--border-color);
    border-radius: 28px;
    padding: clamp(24px, 4vw, 46px);
    box-shadow: 0 24px 55px rgba(0,0,0,.35);
    overflow: hidden;
}

.article-breadcrumb {
    color: var(--primary);
    font-size: 13px;
    font-weight: 700;
    margin-bottom: 15px;
    text-transform: uppercase;
    letter-spacing: .8px;
}

.article-hero-box h1 {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3.7rem);
    color: #fff;
    line-height: 1.18;
    margin-bottom: 18px;
}

.article-excerpt {
    color: #94a3b8;
    font-size: 17px;
    line-height: 1.75;
    max-width: 860px;
}

.article-featured-image {
    margin: 34px 0;
    border-radius: 24px;
    width: 100%;
    max-height: 520px;
    object-fit: cover;
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 44px rgba(0,0,0,.36);
}

.article-content {
    color: #dbe5f3;
    font-size: 16px;
    line-height: 1.82;
}
.article-content h1,
.article-content h2,
.article-content h3,
.article-content h4 {
    color: #fff;
    font-family: var(--font-display);
    line-height: 1.35;
    margin: 28px 0 12px;
}
.article-content h2 { font-size: 1.85rem; color: #fff; border-left: 4px solid var(--primary); padding-left: 14px; }
.article-content h3 { font-size: 1.35rem; }
.article-content h4 { font-size: 1.12rem; }
.article-content p { margin: 0 0 16px; }
.article-content ul,
.article-content ol { margin: 12px 0 18px 24px; }
.article-content a { color: #ff6a70; text-decoration: underline; text-underline-offset: 3px; }
 .article-content img { max-width: 100%; height: auto; border-radius: 16px; margin: 16px 0; }
.article-video-embed {
    position: relative;
    width: 100%;
    max-width: 900px;
    margin: 22px auto;
    border-radius: 18px;
    overflow: hidden;
    background: #050507;
    border: 1px solid rgba(255,255,255,.1);
    box-shadow: 0 18px 38px rgba(0,0,0,.35);
}
.article-video-embed::before {
    content: "";
    display: block;
    padding-top: 56.25%;
}
.article-video-embed iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
}
.article-video-tiktok {
    max-width: 420px;
}
.article-video-tiktok::before {
    padding-top: 177.78%;
}
.editor-box .article-video-embed {
    outline: 1px dashed rgba(255,30,39,.45);
}
.editor-box .article-video-embed::after {
    content: attr(data-video-platform);
    position: absolute;
    left: 12px;
    top: 12px;
    z-index: 2;
    background: rgba(255,30,39,.9);
    color: #fff;
    padding: 4px 9px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 800;
    text-transform: uppercase;
}

.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 30px; }
.related-card { background: rgba(255,255,255,.035); border: 1px solid var(--border-color); border-radius: 16px; padding: 18px; transition: var(--transition-smooth); }
.related-card:hover { transform: translateY(-4px); border-color: rgba(255,30,39,.35); }
.related-card h4 { color:#fff; font-size: 15px; margin-bottom: 8px; }
.related-card p { color:#94a3b8; font-size: 13px; }

/* Admin */
.admin-page { background: #09090b; }
.admin-shell {
    padding: 120px 5% 70px;
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}
.admin-card,
.admin-panel {
    background: rgba(18,18,20,.78);
    border: 1px solid var(--border-color);
    border-radius: 22px;
    box-shadow: 0 22px 50px rgba(0,0,0,.35);
    padding: 26px;
}
.admin-card { max-width: 460px; margin: 80px auto; }
.admin-title { color:#fff; font-family: var(--font-display); font-size: 28px; margin-bottom: 16px; }
.admin-sub { color:#94a3b8; margin-bottom: 22px; }
.admin-form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.admin-form-full { grid-column: 1 / -1; }
.admin-field label { display:block; color:#cbd5e1; font-weight:700; font-size:13px; margin-bottom:7px; }
.admin-field input,
.admin-field textarea,
.admin-field select {
    width: 100%;
    background: rgba(255,255,255,.045);
    border: 1px solid rgba(255,255,255,.1);
    color: #e2e8f0;
    border-radius: 12px;
    padding: 12px 13px;
    font-family: var(--font-body);
    font-size: 14px;
}
.admin-field select option { background: #121214; color: #fff; }
.admin-field textarea { min-height: 105px; resize: vertical; }
.admin-btn-row { display:flex; gap: 12px; align-items:center; justify-content: space-between; margin-top: 18px; flex-wrap: wrap; }
.admin-btn,
.admin-link-btn {
    border: 0;
    cursor: pointer;
    border-radius: 12px;
    padding: 12px 18px;
    font-weight: 800;
    color: #fff;
    background: linear-gradient(135deg,var(--primary),#d60e16);
    box-shadow: 0 10px 24px rgba(255,30,39,.25);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.admin-link-btn.secondary { background: rgba(255,255,255,.055); box-shadow: none; border: 1px solid var(--border-color); }
.admin-link-btn.danger { background: #8b1118; }
.admin-alert { padding: 12px 14px; border-radius: 12px; margin-bottom: 16px; background: rgba(255,30,39,.11); border: 1px solid rgba(255,30,39,.22); color:#fff; }
.admin-table { width:100%; border-collapse: collapse; margin-top: 18px; overflow:hidden; border-radius:16px; }
.admin-table th,
.admin-table td { border-bottom: 1px solid rgba(255,255,255,.07); padding: 13px 10px; color:#cbd5e1; text-align:left; font-size: 13px; vertical-align: middle; }
.admin-table th { color:#fff; background: rgba(255,255,255,.035); font-size: 12px; text-transform: uppercase; letter-spacing:.5px; }
.admin-post-thumb { width: 70px; height: 48px; object-fit:cover; border-radius: 10px; border:1px solid var(--border-color); }
.status-pill { border-radius:999px; padding: 4px 9px; font-size:11px; font-weight:800; background: rgba(13,110,253,.14); color:#8ec5ff; }
.status-pill.published { background: rgba(16,185,129,.12); color:#86efac; }
.seo-score-badge { border-radius:999px; padding: 5px 10px; font-weight: 900; font-size: 12px; background:#111827; color:#fff; display:inline-flex; align-items:center; gap:4px; }
.seo-good { color:#86efac; }
.seo-mid { color:#fde68a; }
.seo-bad { color:#fca5a5; }

.editor-toolbar {
    display:flex;
    flex-wrap:wrap;
    gap:8px;
    padding: 10px;
    background: rgba(255,255,255,.035);
    border:1px solid rgba(255,255,255,.08);
    border-radius: 14px 14px 0 0;
}
.editor-toolbar button,
.editor-toolbar select,
.editor-toolbar input[type=color] {
    background: rgba(0,0,0,.22);
    border:1px solid rgba(255,255,255,.1);
    color:#fff;
    border-radius: 9px;
    padding: 8px 10px;
    font-weight:700;
    cursor:pointer;
}
.editor-toolbar select option { color:#111; }
.editor-box {
    min-height: 360px;
    background: rgba(255,255,255,.045);
    border: 1px solid rgba(255,255,255,.08);
    border-top:0;
    border-radius: 0 0 14px 14px;
    padding: 18px;
    color:#e2e8f0;
    line-height:1.8;
    overflow:auto;
}
.editor-box:focus { border-color: rgba(255,30,39,.35); }
.editor-box img { max-width: 100%; border-radius: 12px; }

.seo-side { position: sticky; top: 95px; align-self: start; }
.seo-meter { height: 12px; border-radius:999px; overflow:hidden; background:rgba(255,255,255,.08); margin: 12px 0 15px; }
.seo-meter span { display:block; height:100%; width:0%; background: linear-gradient(90deg,#ef4444,#f59e0b,#22c55e); transition: width .35s ease; }
.seo-check-list { display:flex; flex-direction:column; gap:9px; }
.seo-check-item { display:flex; gap:8px; align-items:flex-start; color:#cbd5e1; font-size:13px; border-bottom:1px solid rgba(255,255,255,.05); padding-bottom:8px; }
.seo-check-item.ok i { color:#22c55e; }
.seo-check-item.warn i { color:#f59e0b; }
.seo-check-item.bad i { color:#ef4444; }
.preview-img { max-width: 220px; margin-top: 12px; border-radius: 14px; border:1px solid var(--border-color); display:block; }

@media (max-width: 1180px) {
    .showroom-grid.article-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 992px) {
    .showroom-grid.article-grid { grid-template-columns: repeat(2, 1fr); }
    .admin-form-grid { grid-template-columns: 1fr; }
    .related-grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
    .showroom-grid.article-grid { grid-template-columns: 1fr; }
    .admin-shell { padding-left: 16px; padding-right: 16px; }
    .admin-table { display:block; overflow-x:auto; white-space: nowrap; }
}

@media (max-width: 1100px){ .admin-shell form > div[style*="grid-template-columns"]{ grid-template-columns:1fr !important; } .seo-side{ position:relative; top:auto; } }

/* ===== FIX HIỂN THỊ BÀI VIẾT + VIDEO YOUTUBE =====
   Nội dung vẫn hiện nếu JavaScript lỗi; khi JS chạy mới bật hiệu ứng reveal. */
.reveal-node {
    opacity: 1;
    transform: none;
}
html.js-animate .reveal-node:not(.revealed) {
    opacity: 0;
    transform: translateY(30px);
}
html.js-animate .reveal-node.revealed {
    opacity: 1;
    transform: translateY(0);
}

.slider-inner {
    width: auto !important;
    gap: 20px;
    align-items: stretch;
}
.slider-slide {
    flex: 0 0 calc((100% - 40px) / 3) !important;
    padding: 0 !important;
}
.slider-control-btn:disabled {
    opacity: .35;
    cursor: not-allowed;
}
.indicator-dot {
    border: 0;
    padding: 0;
}
.video-label {
    gap: 12px;
}
.video-label h5 {
    line-height: 1.45;
}
@media (max-width: 992px) {
    .slider-slide {
        flex-basis: 100% !important;
    }
    .slider-viewport-container {
        padding: 0 36px;
    }
    .video-label {
        flex-direction: column;
        align-items: flex-start;
    }
}


/* ===== Nâng cấp trình soạn bài SEO: H1-H4, code HTML, thêm danh mục ===== */
.category-inline-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
    align-items: center;
}
.admin-mini-btn {
    border: 1px solid rgba(255,255,255,0.12);
    background: rgba(255,255,255,0.05);
    color: #fff;
    border-radius: 10px;
    padding: 10px 13px;
    cursor: pointer;
    font-weight: 700;
    font-size: 13px;
    transition: var(--transition-smooth);
    white-space: nowrap;
}
.admin-mini-btn:hover {
    border-color: rgba(255,30,39,0.45);
    background: rgba(255,30,39,0.16);
    transform: translateY(-1px);
}
.admin-mini-btn.primary {
    background: linear-gradient(135deg, var(--primary), #d60e16);
    border-color: rgba(255,30,39,0.65);
    box-shadow: 0 8px 18px rgba(255,30,39,0.22);
}
.admin-mini-btn.secondary {
    background: rgba(255,255,255,0.04);
}
.new-category-box {
    margin-top: 10px;
    padding: 12px;
    border: 1px dashed rgba(255,255,255,0.15);
    background: rgba(255,255,255,0.025);
    border-radius: 14px;
    gap: 9px;
}
.new-category-box textarea {
    min-height: 74px;
}
.category-actions-row {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}
.new-category-box small {
    color: #94a3b8;
    line-height: 1.5;
}
.editor-toolbar-main {
    align-items: center;
}
.editor-toolbar-main button,
.editor-toolbar-main select,
.editor-toolbar-main input[type="color"] {
    min-height: 35px;
}
.toolbar-separator {
    width: 1px;
    height: 24px;
    background: rgba(255,255,255,0.13);
    display: inline-block;
    margin: 0 3px;
}
.editor-upload-label {
    padding: 8px 10px !important;
    margin: 0 !important;
    box-shadow: none !important;
    cursor: pointer;
    min-height: 35px;
    display: inline-flex !important;
    align-items: center;
    gap: 7px;
}
.code-toggle-btn {
    background: rgba(13,110,253,0.14) !important;
    border-color: rgba(13,110,253,0.35) !important;
    color: #dbeafe !important;
}
.code-toggle-btn:hover {
    background: rgba(13,110,253,0.25) !important;
}
.editor-mode-note {
    color: #94a3b8;
    font-size: 12.5px;
    margin: 8px 0 10px;
    display: flex;
    gap: 7px;
    align-items: center;
}
.editor-code-area {
    width: 100%;
    min-height: 520px;
    resize: vertical;
    font-family: Consolas, Monaco, 'Courier New', monospace;
    font-size: 13.5px;
    line-height: 1.65;
    color: #e5e7eb;
    background: #070708;
    border: 1px solid rgba(13,110,253,0.35);
    border-radius: 16px;
    padding: 18px;
    box-shadow: inset 0 0 0 1px rgba(255,255,255,0.02), 0 12px 28px rgba(0,0,0,0.24);
    outline: none;
}
.editor-code-area:focus {
    border-color: rgba(13,110,253,0.7);
    box-shadow: 0 0 0 3px rgba(13,110,253,0.14);
}
.editor-box h1,
.editor-box h2,
.editor-box h3,
.editor-box h4,
.article-content h1,
.article-content h2,
.article-content h3,
.article-content h4 {
    color: #fff;
    line-height: 1.35;
    margin: 18px 0 10px;
}
.editor-box h1 { font-size: 30px; }
.editor-box h2 { font-size: 25px; }
.editor-box h3 { font-size: 21px; }
.editor-box h4 { font-size: 18px; }
.editor-box p { margin: 0 0 14px; }
.editor-box img {
    max-width: 100%;
    height: auto;
    border-radius: 14px;
    margin: 14px 0;
    border: 1px solid rgba(255,255,255,0.08);
}
@media (max-width: 700px) {
    .category-inline-row { grid-template-columns: 1fr; }
    .editor-code-area { min-height: 360px; font-size: 12.5px; }
}

/* ===== Sửa hiển thị thẻ bài viết trang chủ: bỏ SEO/từ khóa, dùng nút Xem Chi tiết ===== */
.article-read-more {
    font-size: 13px;
    font-weight: 800;
    color: #fff;
    letter-spacing: .2px;
}
.article-read-more span {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: #fff;
}
.article-card-link:hover .article-read-more span {
    color: var(--primary);
}
.article-card-link .btn-card {
    flex-shrink: 0;
}

/* ===== Quản lý danh mục: thêm/sửa/xóa ===== */
.category-inline-row {
    grid-template-columns: minmax(0, 1fr) auto auto;
}
.category-manage-form {
    margin-top: 22px;
    margin-bottom: 24px;
    padding: 18px;
    border: 1px solid rgba(255,255,255,0.08);
    background: rgba(255,255,255,0.025);
    border-radius: 18px;
}
.admin-alert {
    margin-top: 16px;
    padding: 12px 14px;
    border-radius: 14px;
    border: 1px solid rgba(255,255,255,0.1);
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 9px;
}
.admin-alert.success {
    color: #bbf7d0;
    background: rgba(34,197,94,0.10);
    border-color: rgba(34,197,94,0.22);
}
.admin-alert.danger {
    color: #fecaca;
    background: rgba(239,68,68,0.10);
    border-color: rgba(239,68,68,0.24);
}
.category-admin-table code {
    color: #dbeafe;
    background: rgba(13,110,253,0.11);
    border: 1px solid rgba(13,110,253,0.2);
    border-radius: 8px;
    padding: 3px 7px;
}
.admin-link-btn.danger {
    background: rgba(239,68,68,0.12);
    border-color: rgba(239,68,68,0.25);
    color: #fecaca;
}
.admin-link-btn.danger:hover {
    background: rgba(239,68,68,0.2);
    border-color: rgba(239,68,68,0.42);
}
@media (max-width: 700px) {
    .category-inline-row { grid-template-columns: 1fr; }
}

/* ===== FIX PHÂN TRANG BÀI VIẾT TRANG CHỦ ===== */
.article-grid-shell.is-loading {
    pointer-events: none;
}
.article-grid-shell.is-loading .cms-pagination {
    opacity: .55;
}
.article-slider-track {
    min-height: 120px;
}
.article-slider-track.slide-out-left,
.article-slider-track.slide-out-right {
    opacity: .08;
}
.article-slider-track .article-card-link.revealed {
    display: flex;
}

/* ===== Admin password tools ===== */
.admin-card-wide {
    max-width: 560px;
}
.admin-help {
    display: block;
    margin-top: 7px;
    color: #94a3b8;
    font-size: 12px;
    line-height: 1.55;
}
.admin-help strong,
.admin-sub code {
    color: #fff;
    background: rgba(255,255,255,.08);
    border: 1px solid rgba(255,255,255,.1);
    padding: 2px 6px;
    border-radius: 6px;
}

/* FIX V4: nút Ảnh trong bài dùng label mở file picker ổn định hơn button JS */
.editor-image-input-hidden {
    position: fixed !important;
    left: -9999px !important;
    top: -9999px !important;
    width: 1px !important;
    height: 1px !important;
    opacity: 0 !important;
    pointer-events: none !important;
}
.editor-upload-label {
    user-select: none;
    -webkit-user-select: none;
}

/* Trạng thái upload ảnh trong trình soạn thảo */
.editor-image-status {
    display: inline-flex;
    align-items: center;
    min-height: 32px;
    font-size: 12px;
    color: #94A3B8;
    margin-left: 6px;
}
.editor-image-status.loading { color: #facc15; }
.editor-image-status.success { color: #22c55e; }
.editor-image-status.error { color: #ff5c64; }
.editor-box .editor-inserted-image { margin: 16px 0; }
.editor-box img { max-width: 100%; height: auto; display: block; border-radius: 12px; }


/* ===== V6: sửa chèn ảnh trong nội dung bài viết + ALT ===== */
.editor-image-alt-input {
    min-width: 190px;
    max-width: 260px;
    padding: 10px 12px;
    border-radius: 10px;
    border: 1px solid rgba(255,255,255,0.12);
    background: rgba(255,255,255,0.05);
    color: #fff;
    font-size: 13px;
}
.editor-image-alt-input::placeholder { color: #94a3b8; }
.editor-inserted-image {
    display: block;
    margin: 18px auto;
    text-align: center;
    max-width: 100%;
}
.editor-inserted-image img,
.article-content .editor-inserted-image img,
.article-content img {
    display: block;
    max-width: 100% !important;
    height: auto !important;
    margin: 0 auto;
    border-radius: 14px;
}
.editor-inserted-image figcaption,
.article-content .editor-inserted-image figcaption {
    margin-top: 8px;
    font-size: 13px;
    color: #94a3b8;
    text-align: center;
}
@media (max-width: 700px){
    .editor-image-alt-input { width: 100%; max-width: 100%; }
}


/* V9 - Co kéo kích thước ảnh trong trình soạn bài */
.admin-editor .image-resizable,
.editor-box .image-resizable,
.article-editor .image-resizable,
#editorBox .image-resizable {
    position: relative;
    display: inline-block;
    vertical-align: top;
    max-width: 100%;
    min-width: 90px;
    margin: 18px auto;
    border: 1px dashed transparent;
    border-radius: 12px;
}
#editorBox .image-resizable img {
    display: block;
    width: 100%;
    height: auto;
    max-width: 100%;
    border-radius: 12px;
    pointer-events: none;
}
#editorBox .image-resizable:hover,
#editorBox .image-resizable.is-selected,
#editorBox .image-resizable.is-resizing {
    border-color: rgba(255, 30, 39, 0.85);
    box-shadow: 0 0 0 3px rgba(255, 30, 39, 0.12);
}
#editorBox .image-resize-handle {
    position: absolute;
    right: -7px;
    bottom: -7px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #FF1E27;
    border: 2px solid #fff;
    cursor: nwse-resize;
    z-index: 20;
    box-shadow: 0 6px 16px rgba(0,0,0,.35);
}
#editorBox .image-resize-sizebox {
    position: absolute;
    right: 18px;
    bottom: -30px;
    background: rgba(10,10,11,.9);
    color: #fff;
    border: 1px solid rgba(255,255,255,.14);
    border-radius: 6px;
    padding: 2px 7px;
    font-size: 11px;
    display: none;
    z-index: 21;
}
#editorBox .image-resizable.is-resizing .image-resize-sizebox,
#editorBox .image-resizable.is-selected .image-resize-sizebox {
    display: inline-block;
}
#editorBox figure.editor-inserted-image figcaption {
    text-align: center;
    font-style: italic;
    color: #94A3B8;
    font-size: 13px;
    margin-top: 8px;
}

/* ===== V10: Thư viện ảnh bài viết + giữ phân giải gốc ===== */
.media-modal {
    position: fixed;
    inset: 0;
    z-index: 99999;
    background: rgba(0,0,0,.72);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.media-modal.active { display: flex; }
.media-modal-card {
    width: min(1180px, 96vw);
    max-height: 92vh;
    overflow: hidden;
    background: #0f1014;
    border: 1px solid rgba(255,255,255,.12);
    border-radius: 18px;
    box-shadow: 0 30px 90px rgba(0,0,0,.55);
    display: flex;
    flex-direction: column;
}
.media-modal-head,
.media-modal-tools,
.media-modal-foot {
    padding: 16px 18px;
    border-bottom: 1px solid rgba(255,255,255,.08);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}
.media-modal-head h3 { margin: 0; color: #fff; font-size: 22px; }
.media-modal-head p { margin: 4px 0 0; color: #94A3B8; font-size: 13px; }
.media-close-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid rgba(255,255,255,.14);
    background: rgba(255,255,255,.06);
    color: #fff;
    font-size: 28px;
    cursor: pointer;
}
.media-modal-tools { justify-content: flex-start; }
.media-modal-tools input[type="text"] {
    min-width: 280px;
    flex: 1;
    padding: 11px 13px;
    border-radius: 10px;
    border: 1px solid rgba(255,255,255,.12);
    background: rgba(255,255,255,.05);
    color: #fff;
}
.media-tabs {
    display: flex;
    gap: 8px;
    padding: 12px 18px 0;
}
.media-tab {
    border: 1px solid rgba(255,255,255,.12);
    color: #CBD5E1;
    background: rgba(255,255,255,.04);
    padding: 9px 14px;
    border-radius: 999px;
    cursor: pointer;
    font-weight: 700;
}
.media-tab.active {
    background: #FF1E27;
    color: #fff;
    border-color: #FF1E27;
}
.media-panel {
    display: none;
    overflow: auto;
    padding: 18px;
}
.media-panel.active { display: block; }
.media-grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 14px;
}
.media-item {
    background: rgba(255,255,255,.04);
    border: 1px solid rgba(255,255,255,.09);
    border-radius: 14px;
    overflow: hidden;
}
.media-thumb {
    aspect-ratio: 1 / 1;
    background: #17181d;
    display: flex;
    align-items: center;
    justify-content: center;
}
.media-thumb img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}
.media-info {
    padding: 10px;
    min-height: 58px;
}
.media-info strong {
    display: block;
    color: #fff;
    font-size: 12px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.media-info span {
    color: #94A3B8;
    font-size: 11px;
}
.media-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
    padding: 0 10px 10px;
}
.media-actions button {
    border: 1px solid rgba(255,255,255,.12);
    border-radius: 8px;
    background: rgba(255,255,255,.06);
    color: #fff;
    padding: 8px 6px;
    font-size: 12px;
    cursor: pointer;
}
.media-actions button:first-child { background: #FF1E27; border-color: #FF1E27; }
.media-actions button.danger {
    grid-column: span 2;
    background: rgba(255,30,39,.12);
    color: #ff7a80;
    border-color: rgba(255,30,39,.35);
}
.media-empty,
.media-note {
    color: #94A3B8;
    background: rgba(255,255,255,.04);
    border: 1px dashed rgba(255,255,255,.15);
    border-radius: 12px;
    padding: 18px;
}
.media-modal-foot {
    border-bottom: 0;
    border-top: 1px solid rgba(255,255,255,.08);
    justify-content: flex-end;
}
#editorBox figure.editor-inserted-image img,
.article-content figure.editor-inserted-image img {
    image-rendering: auto;
}
@media (max-width: 1100px){ .media-grid { grid-template-columns: repeat(4, minmax(0,1fr)); } }
@media (max-width: 800px){ .media-grid { grid-template-columns: repeat(2, minmax(0,1fr)); } .media-modal-tools input[type="text"]{min-width:100%;} }
@media (max-width: 480px){ .media-grid { grid-template-columns: 1fr; } }

/* V11: nút xóa ảnh trong nội dung bài viết */
.admin-link-btn.danger-soft {
    background: rgba(239,68,68,0.12) !important;
    border: 1px solid rgba(239,68,68,0.28) !important;
    color: #fecaca !important;
    box-shadow: none !important;
}
.admin-link-btn.danger-soft:hover {
    background: rgba(239,68,68,0.22) !important;
    border-color: rgba(239,68,68,0.48) !important;
    color: #fff !important;
}


/* V18 - Co kéo kích thước video trong trình soạn bài */
.editor-box .article-video-embed.video-resizable {
    cursor: pointer;
    resize: none;
}
.editor-box .article-video-embed.is-video-selected {
    outline: 2px solid var(--primary);
    box-shadow: 0 0 0 4px rgba(255, 30, 39, .16), 0 18px 38px rgba(0,0,0,.35);
}
.video-resize-handle {
    position: absolute;
    right: 8px;
    bottom: 8px;
    width: 18px;
    height: 18px;
    z-index: 5;
    border-radius: 50%;
    background: var(--primary);
    border: 2px solid #fff;
    cursor: nwse-resize;
    box-shadow: 0 4px 12px rgba(0,0,0,.35);
}
.video-resize-sizebox {
    position: absolute;
    right: 34px;
    bottom: 8px;
    z-index: 5;
    background: rgba(10,10,11,.86);
    color: #fff;
    border: 1px solid rgba(255,255,255,.16);
    border-radius: 999px;
    padding: 3px 9px;
    font-size: 11px;
    font-weight: 700;
    pointer-events: none;
}
.article-content .video-resize-handle,
.article-content .video-resize-sizebox {
    display: none !important;
}
@media (max-width: 768px) {
    .article-video-embed[style*="width"] {
        width: 100% !important;
        max-width: 100% !important;
    }
}