/* QUY ƯỚC FONT CHUNG CHO TOÀN BỘ WEBSITE */
        * { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Archivo', sans-serif !important; }

        /* QUY ƯỚC CÁC TIÊU ĐỀ H2 CHUNG TOÀN TRANG */
        h2 { font-size: 36px !important; font-weight: 900 !important; color: #2E7D32; text-transform: uppercase; margin-bottom: 20px; }

        /* --- HEADER --- */
        .main-header {
            background: linear-gradient(90deg, #1B8636 0%, #4CB050 50%, #81C784 100%);
            display: flex; justify-content: flex-start; align-items: center;
            padding: 15px 50px; box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15); 
            position: sticky; top: 0; z-index: 100;
        }
        .logo { margin-right: 60px; display: flex; align-items: center; }
        .logo a {
            font-size: 32px; color: #ffffff; text-decoration: none; font-weight: 900; 
            letter-spacing: 1px; text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3); transition: transform 0.3s ease; 
        }
        .logo a:hover { transform: scale(1.05); }

        .menu ul { display: flex; list-style: none; gap: 30px; margin-top: 4px; }
        .menu a {
            font-size: 15px; color: #ffffff; text-decoration: none; font-weight: 600;
            text-transform: uppercase; transition: color 0.3s ease, border-bottom 0.3s ease;
            padding-bottom: 5px; border-bottom: 2px solid transparent; 
        }
        .menu a:hover { color: #E8F5E9; border-bottom: 2px solid #ffffff; }
        .menu .disabled-link { color: rgba(255, 255, 255, 0.6); pointer-events: none; }

        /* --- SLIDER BANNER --- */
        .hero-slider { position: relative; height: 80vh; overflow: hidden; }
        .slide {
            position: absolute; top: 0; left: 0; width: 100%; height: 100%;
            background-size: cover; background-position: center; opacity: 0; 
            transition: opacity 0.3s ease-in-out; display: flex; align-items: center; padding: 0 10%;
        }
        .slide.active { opacity: 1; z-index: 10; }
        .slide::before { content: ""; position: absolute; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0, 0, 0, 0.5); z-index: 0; }
        .hero-content { position: relative; z-index: 11; color: #ffffff; max-width: 600px; }
        .hero-content h1 { font-size: 48px; font-weight: 800; line-height: 1.2; margin-bottom: 20px; }
        .hero-content h1 span { color: #81C784; }
        .hero-content p { font-size: 18px; line-height: 1.6; margin-bottom: 30px; }
        .cta-button {
            display: inline-block; background-color: #2E7D32; color: #ffffff; font-size: 18px; font-weight: bold; 
            text-decoration: none; padding: 15px 35px; border-radius: 5px; transition: all 0.3s ease;
        }
        .cta-button:hover { background-color: #1B8636; transform: translateY(-3px); }
        .nav-btn {
            position: absolute; top: 50%; transform: translateY(-50%); background: rgba(0, 0, 0, 0.3); color: white; border: none;
            padding: 15px 20px; font-size: 24px; cursor: pointer; z-index: 20; transition: background 0.3s ease; border-radius: 5px;
        }
        .nav-btn:hover { background: rgba(0, 0, 0, 0.8); }
        .prev-btn { left: 20px; }
        .next-btn { right: 20px; }

        /* --- KHU VỰC GIỚI THIỆU CÔNG TY --- */
        .company-intro { padding: 80px 50px; background-color: #f9f9f9; text-align: center; }
        .intro-description { font-size: 16px; font-weight: 700; color: #333333; max-width: 800px; margin: 0 auto 50px auto; line-height: 1.6; }
        .intro-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px; max-width: 1200px; margin: 0 auto; }
        .intro-item { background-color: #ffffff; padding: 40px; border-radius: 10px; box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05); text-align: left; border-left: 5px solid #2E7D32; transition: transform 0.3s ease; }
        .intro-item:hover { transform: translateY(-5px); }
        .intro-item h3 { font-size: 24px; color: #1B8636; margin-bottom: 15px; font-weight: bold; display: flex; align-items: center; gap: 15px; }
        .icon { width: 45px; height: 45px; background-color: #E8F5E9; border-radius: 50%; display: flex; justify-content: center; align-items: center; color: #2E7D32; font-size: 22px; flex-shrink: 0; }
        .intro-item p { font-size: 16px; color: #666; line-height: 1.7; }
        .intro-item ul { list-style-type: disc; margin-left: 20px; margin-top: 10px; color: #666; line-height: 1.7; font-size: 16px;}
        .intro-item li { margin-bottom: 5px; }

        /* --- NÚT TÌM HIỂU THÊM VỀ CÔNG TY --- */
        .intro-action { margin-top: 50px; text-align: center; }
        .learn-more-btn {
            display: inline-block; background-color: #2E7D32; color: #ffffff; font-size: 16px; font-weight: 700; text-decoration: none;
            padding: 15px 40px; border-radius: 30px; text-transform: uppercase; letter-spacing: 1px; box-shadow: 0 4px 10px rgba(46, 125, 50, 0.3); transition: all 0.3s ease;
        }
        .learn-more-btn:hover { background-color: #1B8636; transform: translateY(-3px); box-shadow: 0 6px 15px rgba(46, 125, 50, 0.4); }

        /* --- KHU VỰC ĐỐI TÁC SẢN XUẤT --- */
        .partners-section { padding: 80px 50px; background-color: #ffffff; text-align: center; }
        .partners-section h2 { margin-bottom: 60px; width: 100%; }
        .partners-container { display: flex; justify-content: space-between; gap: 20px; max-width: 1200px; margin: 0 auto; text-align: left; }
        .partners-image-side {
            flex: 1; border-radius: 15px; overflow: hidden; box-shadow: 0 15px 35px rgba(0,0,0,0.15); border: 5px solid #ffffff; 
            align-self: stretch; display: flex; align-items: center; justify-content: center;
        }
        .partners-image-side img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform 0.5s ease; }
        .partners-image-side:hover img { transform: scale(1.03); }
        
        .partners-content-side { flex: 1; display: flex; flex-direction: column; gap: 35px; }
        .partner-detail-block h3 { font-size: 22px; color: #1B8636; margin-bottom: 15px; font-weight: 800; text-transform: uppercase; border-left: 5px solid #2E7D32; padding-left: 15px; }
        .partner-detail-block ul { list-style-type: disc; margin-left: 35px; color: #444444; font-size: 16px; line-height: 1.8; }
        .partner-detail-block li { margin-bottom: 10px; }

        /* --- KHỐI THÔNG ĐIỆP CÔNG NGHỆ ĐẶC BIỆT --- */
        .tech-highlight {
            margin-top: 40px; padding: 20px 20px 20px 20px; text-align: center; background-color: #f9f9f9; 
            max-width: 1000px; margin-left: auto; margin-right: auto; border-radius: 10px; box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .tech-highlight p { font-size: 24px; font-weight: 800; color: #1B8636; line-height: 1.5; text-transform: uppercase; letter-spacing: 0.5px; }
        .tech-highlight p span { color: #D32F2F; }

        /* --- KHU VỰC DANH MỤC NGUYÊN LIỆU --- */
        .materials-section { background-color: #f9f9f9; padding-top: 50px; padding-bottom: 50px; text-align: center;}
        .materials-section h2 { margin-bottom: 80px; letter-spacing: 1px; }

        /* --- ĐIỀU HƯỚNG BẰNG HÌNH ẢNH --- */
        .materials-nav {
            display: flex;
            justify-content: center;
            gap: 60px;
            margin-bottom: 25px; 
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            
            position: sticky;
            top: 65px; 
            z-index: 98; 
            background-color: rgba(255, 255, 255, 0.95);
            padding: 10px 0; 
            transition: all 0.4s ease;
        }
        .materials-nav.is-sticky { padding: 10px 20px; box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1); border-radius: 0 0 15px 15px; gap: 30px; }
        .nav-image-btn { flex: 1; position: relative; height: 200px; border-radius: 15px; overflow: hidden; cursor: pointer; box-shadow: 0 10px 25px rgba(0,0,0,0.2); transition: all 0.4s ease; }
        .materials-nav.is-sticky .nav-image-btn { height: 60px; }
        .nav-image-btn img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s ease; }
        .nav-image-btn:hover img { transform: scale(1.1); }
        .nav-image-overlay {
            position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0, 0, 0, 0.4); 
            display: flex; justify-content: center; align-items: center; transition: background 0.3s ease;
        }
        .nav-image-btn:hover .nav-image-overlay { background: rgba(46, 125, 50, 0.5); }
        .nav-image-overlay span { color: #ffffff; font-weight: 900; font-size: 28px; text-transform: uppercase; letter-spacing: 2px; text-shadow: 2px 2px 10px rgba(0,0,0,0.5); text-align: center; padding: 0 20px; transition: font-size 0.4s ease; }
        .materials-nav.is-sticky .nav-image-overlay span { font-size: 20px; }

        /* --- CHỮ DIỄN GIẢI DƯỚI ẢNH --- */
        .materials-nav-desc {
            display: flex; justify-content: center; gap: 60px; max-width: 1200px; margin: 0 auto 60px auto; padding: 0;
            position: relative; z-index: 1; 
            transition: all 0.4s ease;
        }
        .nav-desc-col { flex: 1; text-align: left; }
        .nav-desc-col ul { list-style-type: none; padding: 0; }
        .nav-desc-col li { font-size: 16px; color: #555555; line-height: 1.7; margin-bottom: 8px; position: relative; padding-left: 20px; }
        .nav-desc-col li::before { content: "*"; color: #2E7D32; font-weight: bold; position: absolute; left: 0; top: 2px; }

        /* THIẾT KẾ MỚI: CHIA ĐÔI MÀN HÌNH */
        .materials-split-layout {
            display: flex;
            gap: 60px; 
            max-width: 1200px;
            margin: 0 auto 15px auto;
            align-items: flex-start;
        }

        .materials-list-side {
            flex: 3; 
            display: flex;
            flex-direction: column;
            gap: 15px;
            min-width: 0; 
        }

        .materials-detail-side {
            flex: 7; 
            position: relative;
            min-width: 0; 
        }

        .material-card {
            background: #F9F9F9; border: 1px solid #ddd; border-radius: 8px; transition: 0.3s;
            overflow: hidden;
        }
        .material-card:hover { border-color: #2E7D32; box-shadow: 0 4px 15px rgba(46, 125, 50, 0.1); }
        
        .material-header { 
            padding: 20px; 
            display: flex; 
            justify-content: flex-start; 
            align-items: center; 
            gap: 15px; 
            cursor: pointer; 
            background: #F9F9F9; 
            transition: background 0.3s; 
        }
        .material-header:hover { background: #E8F5E9; }
        .material-title { font-weight: 700; color: #333; font-size: 16px; text-align: left; }
        .btn-expand { font-size: 24px; font-weight: bold; color: #2E7D32; }

        /* ĐỊNH DẠNG CỬA SỔ CHI TIẾT BÊN CỘT PHẢI */
        .product-details {
            grid-column: 1 / -1; 
            display: none; 
            background: #fff;
            border: 2px solid #2E7D32;
            margin-top: 15px;
            overflow: hidden;
            text-align: left;
            animation: slideRight 0.4s ease-out; 
            border-radius: 8px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
            width: 100%; 
        }
        
        @keyframes slideRight { 
            from { opacity: 0; transform: translateX(-30px); } 
            to { opacity: 1; transform: translateX(0); } 
        }

        .details-part-1 { width: 100%; height: 300px; }
        .details-part-1 img { width: 100%; height: 100%; box-shadow: 0 4px 10px rgba(0,0,0,0.1); object-fit: cover; cursor: pointer; transition: 0.3s; }
        
        .details-part-2 { display: block; padding: 30px; background: #ffffff; }
        .part-2-text { font-size: 16px; line-height: 1.8; color: #333; text-align: left; }
        .part-2-text p { font-size: 16px; }
        .part-2-small-img-container { display: none; }
        .part-2-small-img { width: 100%; border-radius: 8px; box-shadow: 0 2px 8px rgba(0,0,0,0.1); }
        .details-part-3 { background: #f0f0f0; padding: 20px 0; border-top: 1px solid #ddd; overflow: hidden; white-space: nowrap; position: relative; }
        .marquee-track { display: flex; width: max-content; animation: scrollMarquee 25s linear infinite; }
        .marquee-track:hover { animation-play-state: paused; }
        .marquee-track img { height: 150px; margin: 0 10px; border-radius: 5px; cursor: pointer; transition: 0.3s; }
        .marquee-track img:hover { transform: scale(1.05); outline: 3px solid #2E7D32; }
        @keyframes scrollMarquee { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

        /* --- GIAO DIỆN TAB SẢN PHẨM CON --- */
        .sub-product-tabs {
            display: flex; gap: 10px; padding: 20px 20px 0 20px;
            background: #ffffff; border-bottom: 2px solid #2E7D32; 
        }
        .sub-tab-btn {
            padding: 10px 20px; border: none; background: #F0F0F0;
            color: #555; font-weight: 700; font-size: 14px; text-transform: uppercase;
            border-radius: 8px 8px 0 0; cursor: pointer; transition: 0.3s;
        }
        .sub-tab-btn.active { background: #2E7D32; color: #ffffff; }
        .sub-tab-btn:hover:not(.active) { background: #E8F5E9; color: #2E7D32; }

        /* --- KHUNG NỘI DUNG TỪNG TAB --- */
        .sub-product-content { display: none; animation: fadeIn 0.4s ease; }
        .sub-product-content.active { display: block; }
        @keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

        /* --- ĐIỀU CHỈNH PHẦN 1: 2 ẢNH SONG SONG --- */
        .details-part-1.split-images {
            display: flex; gap: 20px; padding: 20px; height: auto; background: #ffffff;
        }
        .details-part-1.split-images img {
            flex: 1; width: 50%; height: 250px; object-fit: cover;
            border-radius: 8px; box-shadow: 0 4px 10px rgba(0,0,0,0.1);
        }
        
        /* LỚP LÀM MỜ NỀN & ZOOM ẢNH */
        .lightbox {
            position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0, 0, 0, 0.9); 
            display: none; justify-content: center; align-items: center; z-index: 9999; 
        }
        .lightbox img { max-width: 85%; max-height: 85%; border: 5px solid #fff; border-radius: 5px; box-shadow: 0 0 30px rgba(0,0,0,0.5); }
        .close-lightbox { position: absolute; top: 30px; right: 50px; color: #fff; font-size: 60px; cursor: pointer; font-weight: bold; }

        /* RESPONSIVE CHO ĐIỆN THOẠI */
        @media (max-width: 992px) { 
            .partners-container { flex-direction: column; } 
            .partners-image-side, .partners-content-side { width: 100%; } 
        }
        @media (max-width: 768px) { 
            .intro-grid { grid-template-columns: 1fr; } 
            .materials-nav { flex-direction: column; gap: 20px; } 
            .details-part-2 { grid-template-columns: 1fr; } 
            .materials-split-layout { flex-direction: column; } 
            .materials-list-side, .materials-detail-side { width: 100%; flex: 1; }
        }

        /* CSS cho phần Chứng chỉ & Tiêu chuẩn */
        .certifications-section { padding: 80px 20px 50px 20px; background-color: #ffffff; text-align: center; }
        .cert-container { max-width: 1200px; margin: 0 auto; text-align: center; }
        .cert-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
        }
        .cert-card { background: #f9f9f9; padding: 30px 20px; border-radius: 10px; border: 1px solid #eeeeee; transition: transform 0.3s ease, box-shadow 0.3s ease; }
        .cert-card:hover { transform: translateY(-5px); box-shadow: 0 10px 20px rgba(0, 0, 0, 0.08); }
        .cert-logo-wrapper { height: 120px; display: flex; align-items: center; justify-content: center; margin-bottom: 20px; }
        .cert-logo-wrapper img { max-width: 100%; max-height: 100%; object-fit: contain; }
        .cert-name { font-size: 18px; font-weight: 700; color: #0056b3; margin-bottom: 10px; }
        .cert-description { font-size: 16px; color: #555555; line-height: 1.6; margin: 0; }

        /* Tổng thể khu vực Giới thiệu */
        .about-tsh-section { max-width: 1000px; margin: 60px auto; padding: 0 20px; }
        .video-wrapper {
            position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; border-radius: 12px;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12); margin-bottom: 40px; background-color: #f9f9f9;
        }
        .video-wrapper iframe { position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: none; }
        .about-content { text-align: center; }
        .about-text { font-size: 16px; color: #555555; line-height: 1.8; text-align: justify; margin-bottom: 15px; }

        /* Tổng thể khu vực Ứng dụng */
        .applications-section { background-color: #f9f9f9; padding: 40px 0 60px 0; margin-left: calc(50% - 50vw); margin-right: calc(50% - 50vw); text-align: center; }
        .app-features-list { max-width: 900px; margin: 0 auto 40px auto; text-align: center; color: #333333; font-size: 16px; line-height: 1.8; padding: 0 20px; }
        .app-grid-container {
            max-width: 1200px; margin: 0 auto; padding: 0 20px; display: grid;
            grid-template-columns: repeat(5, 1fr); gap: 20px;
        }
        .app-card { background-color: #ffffff; display: flex; flex-direction: column; overflow: hidden; aspect-ratio: 1 / 1; cursor: pointer; }
        .app-card img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.3s ease; }
        .app-card:hover img { transform: scale(1.05); }

        @media (max-width: 992px) { .app-grid-container { grid-template-columns: repeat(3, 1fr); } }
        @media (max-width: 600px) { .app-grid-container { grid-template-columns: repeat(2, 1fr); } }

/* --- KHU VỰC KIẾN THỨC HỮU ÍCH --- */
        .news-section {
            padding: 80px 20px;
            background-color: #ffffff;
            max-width: 1200px;
            margin: 0 auto;
        }
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 40px;
        }
        .news-card {
            background: #fff;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 4px 15px rgba(0,0,0,0.05);
            transition: transform 0.3s;
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 25px rgba(0,0,0,0.1);
        }
        .news-card img {
            width: 100%;
            height: 240px;
            object-fit: cover;
            border-bottom: 1px solid #eee;
        }
        .news-content {
            padding: 25px 20px;
            display: flex;
            flex-direction: column;
            flex-grow: 1;
        }
        .news-content h3 {
            font-size: 18px;
            color: #333;
            margin-bottom: 12px;
            font-weight: 800;
        }
        .news-content p {
            font-size: 15px;
            color: #555;
            line-height: 1.6;
            margin-bottom: 20px;
            flex-grow: 1; /* Tự động đẩy nút Xem Thêm xuống đáy */
        }
        .read-more {
            font-size: 14px;
            font-weight: 800;
            color: #333;
            text-decoration: none;
            transition: color 0.3s;
        }
        .read-more:hover {
            color: #2E7D32;
        }

        /* --- Tương thích màn hình nhỏ --- */
        @media (max-width: 992px) {
            .news-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            .news-grid { grid-template-columns: 1fr; }
        }

/* --- ĐƯỜNG KẺ KẾT THÚC TRANG --- */
        .page-divider {
            width: 50%;
            height: 1px;
            background-color: #2E7D32; 
            margin: 60px auto;
        }

        /* --- FOOTER TỔNG THỂ --- */
        .main-footer {
            background-color: #000000;
            color: #ffffff;
            padding: 80px 20px 50px;
            font-family: Arial, sans-serif;
        }

        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            gap: 60px;
        }

        /* Cột trái: Thông tin công ty */
        .footer-info {
            flex: 1;
        }
        .footer-logo {
            max-width: 220px;
            margin-bottom: 25px;
            display: block;
        }
        .footer-slogan {
            font-style: italic;
            color: #C8E6C9;
            font-size: 18px;
            margin-bottom: 10px;
        }
        .footer-brand {
            font-size: 38px;
            font-weight: 900;
            color: #ffffff;
            margin-bottom: 15px;
            letter-spacing: 1px;
        }
        .footer-company-name {
            font-size: 18px;
            font-weight: 800;
            margin-bottom: 15px;
            color: #ffffff;
            text-transform: uppercase;
        }
        .footer-details p {
            font-size: 16px;
            line-height: 1.2;
            margin-bottom: 12px;
            color: #e0e0e0;
        }
        .footer-details strong {
            color: #ffffff;
        }

        /* --- BỐ CỤC MỚI: BCT LOGO VÀ 3 CỘT BẢN QUYỀN --- */
        .bct-img {
            max-width: 200px;
            margin-top: 20px; /* Đẩy sát lên phần Email */
            margin-bottom: 30px; /* Cách 3 cột bên dưới */
            display: block;
        }
        
        .footer-bottom-row {
            display: flex;
            align-items: center;
            gap: 40px; /* Khoảng cách giữa 3 cột */
            font-size: 14px;
            flex-wrap: wrap; /* Tự động xuống dòng trên điện thoại */
        }
        .footer-bottom-row .copyright {
            color: #888888;
        }
        .footer-bottom-row .policy-link a {
            color: #cccccc;
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer-bottom-row .policy-link a:hover {
            color: #2E7D32;
        }

        /* Cột phải: Hộp Gửi yêu cầu */
        .footer-request-box {
            flex: 0 0 450px;
            background-color: #1B8636;
            padding: 30px;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.3);
        }
        .footer-request-box h3 {
            text-align: center;
            font-size: 22px;
            font-weight: 800;
            margin-bottom: 30px;
            color: #ffffff;
            text-transform: uppercase;
        }
        .request-form .form-group {
            margin-bottom: 20px;
        }
        .request-form input,
        .request-form textarea {
            width: 100%;
            padding: 15px;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.6);
            border-radius: 6px;
            color: #ffffff;
            font-size: 15px;
            font-family: inherit;
        }
        .request-form input::placeholder,
        .request-form textarea::placeholder {
            color: rgba(255, 255, 255, 0.8);
        }
        .request-form input:focus,
        .request-form textarea:focus {
            outline: none;
            border-color: #ffffff;
            background: rgba(255, 255, 255, 0.1);
        }
        .request-form textarea {
            height: 100px;
            resize: vertical;
        }
        .request-form .submit-btn {
            width: 100%;
            padding: 15px;
            background-color: #ffffff;
            color: #1B8636;
            border: none;
            border-radius: 30px;
            font-size: 16px;
            font-weight: 800;
            cursor: pointer;
            text-transform: uppercase;
            margin-top: 10px;
            transition: all 0.3s;
        }
        .request-form .submit-btn:hover {
            background-color: #f0f0f0;
            transform: translateY(-2px);
        }

        @media (max-width: 900px) {
            .footer-container { flex-direction: column; }
            .footer-request-box { flex: none; width: 100%; }
            .footer-bottom-row { gap: 20px; }
        }

/* Hiệu ứng cuộn trang mượt mà và tránh bị header che khuất tiêu đề */
html {
    scroll-behavior: smooth;
    /* Nếu thanh menu của anh cao 90px, hãy bù trừ để tiêu đề footer không bị che */
    scroll-padding-top: 90px; 
}
/* --- NÚT LIÊN HỆ NỔI BÊN PHẢI (HIỂN THỊ FULL ẢNH) --- */
.floating-contact {
    position: fixed;
    bottom: 30px;
    right: 30px;
    display: flex;
    flex-direction: column;
    align-items: flex-end; /* Căn lề phải cho các nút thẳng hàng */
    gap: 15px;
    z-index: 9999;
}

.float-btn {
    display: flex;
    justify-content: center;
    align-items: center;
    transition: transform 0.3s ease;
    text-decoration: none;
    background: transparent;
    border: none;
    box-shadow: none; 
}

.float-btn:hover {
    transform: scale(1.1); 
}

/* Các thuộc tính chung cho hình ảnh */
.float-btn img {
    height: auto; 
    object-fit: contain;
    filter: drop-shadow(0 4px 10px rgba(0,0,0,0.3));
}

/* ĐẶT KÍCH THƯỚC RIÊNG CHO TỪNG NÚT */

/* 1. Nút Zalo */
.zalo-btn img {
    width: 50px; /* Kích thước chuẩn của Zalo */
}

/* 2. Nút Gọi Điện (To gấp đôi Zalo) */
.phone-btn img {
    width: 120px;
}

/* --- Tối ưu cho màn hình điện thoại --- */
@media (max-width: 768px) {
    .floating-contact {
        bottom: 20px;
        right: 20px;
    }
    .zalo-btn img {
        width: 35px; /* Thu nhỏ Zalo trên mobile */
    }
    .phone-btn img {
        width: 70px; /* Thu nhỏ nút Gọi nhưng vẫn gấp đôi Zalo */
    }
}