:root {
        --primary-color: #e44d26; /* Một màu cam đỏ mạnh mẽ */
        --secondary-color: #333;
        --accent-color: #f7b731; /* Màu vàng cam */
        --background-color: #f8f8f8;
        --text-color: #333;
        --light-text-color: #666;
        --white-color: #fff;
        --dark-bg-color: #222;
        --border-color: #ddd;
        --shadow-light: 0 4px 10px rgba(0, 0, 0, 0.1);
        --shadow-dark: 0 6px 15px rgba(0, 0, 0, 0.2);
    }

    /* Base styles for the page */
    .page-c54nhacai {
        font-family: 'Arial', sans-serif;
        line-height: 1.6;
        color: var(--text-color);
        background-color: var(--background-color);
    }

    .page-c54nhacai__container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 20px;
    }

    .page-c54nhacai__section {
        padding: 60px 20px;
        margin-bottom: 20px;
        background-color: var(--white-color);
        border-radius: 8px;
        box-shadow: var(--shadow-light);
    }

    .page-c54nhacai__section--dark {
        background-color: var(--dark-bg-color);
        color: var(--white-color);
        box-shadow: var(--shadow-dark);
    }

    .page-c54nhacai__section-title {
        font-size: 2.8em;
        color: var(--primary-color);
        text-align: center;
        margin-bottom: 40px;
        position: relative;
        padding-bottom: 15px;
    }
    .page-c54nhacai__section-title::after {
        content: '';
        position: absolute;
        left: 50%;
        bottom: 0;
        transform: translateX(-50%);
        width: 80px;
        height: 4px;
        background-color: var(--accent-color);
        border-radius: 2px;
    }

    .page-c54nhacai__section-subtitle {
        font-size: 1.8em;
        color: var(--secondary-color);
        text-align: center;
        margin-bottom: 30px;
    }

    .page-c54nhacai__text-center {
        text-align: center;
    }

    .page-c54nhacai__button {
        display: inline-block;
        background-color: var(--primary-color);
        color: var(--white-color);
        padding: 15px 30px;
        border-radius: 50px;
        text-decoration: none;
        font-weight: bold;
        font-size: 1.1em;
        transition: background-color 0.3s ease, transform 0.2s ease;
        border: none;
        cursor: pointer;
    }

    .page-c54nhacai__button:hover {
        background-color: #d44220;
        transform: translateY(-2px);
    }

    /* Hero Section */
    .page-c54nhacai__hero-section {
        position: relative;
        background-color: var(--dark-bg-color);
        color: var(--white-color);
        text-align: center;
        padding: 100px 20px 60px; /* Adjust for header offset */
        overflow: hidden;
        padding-top: var(--header-offset, 120px); /* Ensures content is below fixed header */
    }

    .page-c54nhacai__hero-background {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        object-fit: cover;
        opacity: 0.4;
        z-index: 0;
    }

    .page-c54nhacai__hero-content {
        position: relative;
        z-index: 1;
        max-width: 900px;
        margin: 0 auto;
    }

    .page-c54nhacai__hero-title {
        font-size: 3.8em;
        margin-bottom: 20px;
        line-height: 1.2;
        color: var(--accent-color);
        text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
    }

    .page-c54nhacai__hero-subtitle {
        font-size: 1.6em;
        margin-bottom: 40px;
        color: var(--white-color);
        text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
    }

    /* About Section */
    .page-c54nhacai__about-content {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: 40px;
    }

    .page-c54nhacai__about-image-wrapper {
        flex: 1;
        min-width: 300px;
        text-align: center;
    }

    .page-c54nhacai__about-image {
        max-width: 100%;
        height: auto;
        border-radius: 12px;
        box-shadow: var(--shadow-dark);
        transition: transform 0.3s ease;
        max-height: 400px;
        object-fit: cover;
    }

    .page-c54nhacai__about-image:hover {
        transform: scale(1.02);
    }

    .page-c54nhacai__about-text {
        flex: 2;
        min-width: 300px;
    }

    .page-c54nhacai__about-text h3 {
        font-size: 2em;
        color: var(--primary-color);
        margin-bottom: 20px;
    }

    .page-c54nhacai__about-text p {
        margin-bottom: 15px;
        font-size: 1.1em;
        line-height: 1.8;
    }

    /* Features Section */
    .page-c54nhacai__features-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 30px;
        margin-top: 40px;
    }

    .page-c54nhacai__feature-item {
        background-color: var(--white-color);
        padding: 30px;
        border-radius: 10px;
        box-shadow: var(--shadow-light);
        text-align: center;
        transition: transform 0.3s ease, box-shadow 0.3s ease;
        border: 1px solid var(--border-color);
    }

    .page-c54nhacai__feature-item:hover {
        transform: translateY(-5px);
        box-shadow: var(--shadow-dark);
    }

    .page-c54nhacai__feature-icon {
        width: 100px; /* Placeholder image is 200x200, this is display size */
        height: 100px;
        margin-bottom: 20px;
        object-fit: contain;
    }

    .page-c54nhacai__feature-item h3 {
        font-size: 1.6em;
        color: var(--primary-color);
        margin-bottom: 15px;
    }

    .page-c54nhacai__feature-item p {
        font-size: 1em;
        color: var(--light-text-color);
    }

    /* Products Section */
    .page-c54nhacai__products-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 30px;
        margin-top: 40px;
    }

    .page-c54nhacai__product-card {
        background-color: var(--white-color);
        border-radius: 10px;
        box-shadow: var(--shadow-light);
        overflow: hidden;
        transition: transform 0.3s ease, box-shadow 0.3s ease;
        border: 1px solid var(--border-color);
    }

    .page-c54nhacai__product-card:hover {
        transform: translateY(-5px);
        box-shadow: var(--shadow-dark);
    }

    .page-c54nhacai__product-image {
        width: 100%;
        height: 220px;
        object-fit: cover;
        display: block;
    }

    .page-c54nhacai__product-content {
        padding: 25px;
    }

    .page-c54nhacai__product-content h3 {
        font-size: 1.8em;
        color: var(--secondary-color);
        margin-bottom: 10px;
    }

    .page-c54nhacai__product-content p {
        font-size: 1em;
        color: var(--light-text-color);
        margin-bottom: 20px;
    }

    /* Promotions Section */
    .page-c54nhacai__promotions-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 30px;
        margin-top: 40px;
    }

    .page-c54nhacai__promo-card {
        background-color: var(--white-color);
        border-radius: 10px;
        box-shadow: var(--shadow-light);
        overflow: hidden;
        transition: transform 0.3s ease, box-shadow 0.3s ease;
        border: 1px solid var(--border-color);
    }

    .page-c54nhacai__promo-card:hover {
        transform: translateY(-5px);
        box-shadow: var(--shadow-dark);
    }

    .page-c54nhacai__promo-image {
        width: 100%;
        height: 200px;
        object-fit: cover;
        display: block;
    }

    .page-c54nhacai__promo-content {
        padding: 25px;
    }

    .page-c54nhacai__promo-content h3 {
        font-size: 1.8em;
        color: var(--primary-color);
        margin-bottom: 10px;
    }

    .page-c54nhacai__promo-content p {
        font-size: 1em;
        color: var(--light-text-color);
        margin-bottom: 20px;
    }

    /* Registration Section */
    .page-c54nhacai__registration-steps {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 30px;
        margin-top: 40px;
    }

    .page-c54nhacai__step-item {
        flex: 1;
        min-width: 280px;
        max-width: 350px;
        background-color: var(--white-color);
        padding: 30px;
        border-radius: 10px;
        box-shadow: var(--shadow-light);
        text-align: center;
        border: 1px solid var(--border-color);
    }

    .page-c54nhacai__step-number {
        font-size: 3em;
        color: var(--accent-color);
        font-weight: bold;
        margin-bottom: 15px;
    }

    .page-c54nhacai__step-item h3 {
        font-size: 1.8em;
        color: var(--secondary-color);
        margin-bottom: 15px;
    }

    .page-c54nhacai__step-item p {
        font-size: 1em;
        color: var(--light-text-color);
    }

    /* FAQ Section */
    .page-c54nhacai__faq-list {
        margin-top: 40px;
    }

    .page-c54nhacai__faq-item {
        background-color: var(--white-color);
        border: 1px solid var(--border-color);
        border-radius: 8px;
        margin-bottom: 15px;
        overflow: hidden;
        box-shadow: var(--shadow-light);
    }

    .page-c54nhacai__faq-question {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 20px 25px;
        font-size: 1.2em;
        font-weight: bold;
        color: var(--secondary-color);
        cursor: pointer;
        background-color: #f0f0f0;
        transition: background-color 0.3s ease;
        user-select: none;
    }

    .page-c54nhacai__faq-question:hover {
        background-color: #e0e0e0;
    }

    .page-c54nhacai__faq-question h3 {
        margin: 0;
        font-size: 1.2em;
        color: var(--secondary-color);
        pointer-events: none; /* Prevents text from blocking click event */
        flex-grow: 1;
        text-align: left;
    }

    .page-c54nhacai__faq-toggle {
        font-size: 1.8em;
        line-height: 1;
        margin-left: 15px;
        color: var(--primary-color);
        pointer-events: none; /* Prevents icon from blocking click event */
        transition: transform 0.3s ease;
    }

    .page-c54nhacai__faq-item.active .page-c54nhacai__faq-toggle {
        transform: rotate(45deg); /* Change + to X or similar */
    }

    .page-c54nhacai__faq-answer {
        max-height: 0;
        overflow: hidden;
        padding: 0 25px;
        transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
        opacity: 0;
        color: var(--light-text-color);
        font-size: 1.05em;
        line-height: 1.7;
    }

    .page-c54nhacai__faq-item.active .page-c54nhacai__faq-answer {
        max-height: 2000px !important; /* Sufficiently large */
        padding: 20px 25px !important;
        opacity: 1;
    }

    /* Conclusion Section */
    .page-c54nhacai__conclusion-text {
        font-size: 1.2em;
        margin-bottom: 30px;
    }

    /* Responsive adjustments */
    @media (max-width: 992px) {
        .page-c54nhacai__hero-title {
            font-size: 3em;
        }
        .page-c54nhacai__hero-subtitle {
            font-size: 1.4em;
        }
        .page-c54nhacai__section-title {
            font-size: 2.2em;
        }
        .page-c54nhacai__about-content {
            flex-direction: column;
            text-align: center;
        }
        .page-c54nhacai__about-text {
            text-align: center;
        }
    }

    @media (max-width: 768px) {
        .page-c54nhacai__container {
            padding: 15px;
        }
        .page-c54nhacai__section {
            padding: 40px 15px;
        }
        .page-c54nhacai__hero-section {
            padding: 80px 15px 40px;
        }
        .page-c54nhacai__hero-title {
            font-size: 2.5em;
        }
        .page-c54nhacai__hero-subtitle {
            font-size: 1.2em;
        }
        .page-c54nhacai__section-title {
            font-size: 1.8em;
            margin-bottom: 30px;
        }
        .page-c54nhacai__button {
            padding: 12px 25px;
            font-size: 1em;
        }

        /* Images responsive */
        .page-c54nhacai__about-image,
        .page-c54nhacai__feature-icon,
        .page-c54nhacai__product-image,
        .page-c54nhacai__promo-image {
            max-width: 100% !important;
            height: auto !important;
            box-sizing: border-box !important;
        }

        /* List items responsive */
        .page-c54nhacai__features-grid,
        .page-c54nhacai__products-grid,
        .page-c54nhacai__promotions-grid,
        .page-c54nhacai__registration-steps {
            grid-template-columns: 1fr;
            gap: 20px;
            width: 100% !important;
            max-width: 100% !important;
            box-sizing: border-box !important;
            padding: 0 !important;
            margin-left: 0 !important;
            margin-right: 0 !important;
        }

        .page-c54nhacai__feature-item,
        .page-c54nhacai__product-card,
        .page-c54nhacai__promo-card,
        .page-c54nhacai__step-item,
        .page-c54nhacai__faq-item {
            width: 100% !important;
            max-width: 100% !important;
            box-sizing: border-box !important;
            margin-left: 0 !important;
            margin-right: 0 !important;
            padding-left: 15px !important;
            padding-right: 15px !important;
            word-wrap: break-word !important;
            overflow-wrap: break-word !important;
            word-break: break-word !important;
        }

        .page-c54nhacai__faq-question {
            padding: 15px 15px;
            font-size: 1.1em;
        }
        .page-c54nhacai__faq-question h3 {
            font-size: 1.1em;
        }
        .page-c54nhacai__faq-answer {
            padding: 0 15px;
        }
        .page-c54nhacai__faq-item.active .page-c54nhacai__faq-answer {
            padding: 15px 15px !important;
        }
    }

    @media (max-width: 480px) {
        .page-c54nhacai__hero-title {
            font-size: 2em;
        }
        .page-c54nhacai__hero-subtitle {
            font-size: 1em;
        }
        .page-c54nhacai__section-title {
            font-size: 1.6em;
        }
        .page-c54nhacai__about-text h3 {
            font-size: 1.8em;
        }
        .page-c54nhacai__feature-item h3,
        .page-c54nhacai__product-content h3,
        .page-c54nhacai__promo-content h3,
        .page-c54nhacai__step-item h3 {
            font-size: 1.5em;
        }
    }