:root {
        --color-primary: #e44d26; /* Cam đậm */
        --color-secondary: #ff7f50; /* San hô */
        --color-accent: #ffd700; /* Vàng kim */
        --color-dark: #1a1a1a; /* Gần đen */
        --color-light: #f5f5f5; /* Gần trắng */
        --color-text-dark: #333333;
        --color-text-light: #ffffff;
        --color-bg-dark: #0d0d0d;
        --color-bg-light: #1c1c1c;
        --color-border: #3a3a3a;
        --font-family-primary: 'Arial', sans-serif;
    }

    /* Base styles for the page content */
    .page-28dt {
        font-family: var(--font-family-primary);
        color: var(--color-text-light);
        background-color: var(--color-bg-dark);
        line-height: 1.6;
        padding-bottom: 80px; /* Space for footer and floating buttons */
    }

    .page-28dt__section {
        padding: 40px 20px;
        max-width: 1200px;
        margin: 0 auto;
        box-sizing: border-box;
    }

    .page-28dt__section--dark {
        background-color: var(--color-bg-light);
    }

    .page-28dt__section-title {
        font-size: 2.5em;
        color: var(--color-primary);
        text-align: center;
        margin-bottom: 30px;
        font-weight: bold;
        text-transform: uppercase;
        letter-spacing: 1px;
    }

    .page-28dt__section-subtitle {
        font-size: 1.2em;
        color: var(--color-light);
        text-align: center;
        margin-bottom: 40px;
    }

    /* Hero Section */
    .page-28dt__hero-section {
        position: relative;
        overflow: hidden;
        padding: 10px 0 80px 0; /* Adjusted padding-top as per instructions */
        text-align: center;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        min-height: 600px;
    }

    .page-28dt__hero-background {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        object-fit: cover;
        z-index: -1;
        filter: brightness(0.5); /* Darken background for text visibility */
    }

    .page-28dt__hero-content {
        position: relative;
        z-index: 1;
        max-width: 900px;
        padding: 20px;
    }

    .page-28dt__hero-title {
        font-size: 3.5em;
        color: var(--color-accent);
        margin-bottom: 20px;
        line-height: 1.2;
        text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
    }

    .page-28dt__hero-description {
        font-size: 1.3em;
        color: var(--color-light);
        margin-bottom: 40px;
        text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
    }

    .page-28dt__promo-link {
        display: inline-block;
        background-color: var(--color-primary);
        color: var(--color-text-light);
        padding: 15px 30px;
        font-size: 1.2em;
        font-weight: bold;
        border-radius: 8px;
        text-decoration: none;
        transition: background-color 0.3s ease, transform 0.3s ease;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    }

    .page-28dt__promo-link:hover {
        background-color: var(--color-secondary);
        transform: translateY(-3px);
    }

    /* Floating Buttons */
    .page-28dt__floating-buttons {
        position: fixed;
        bottom: 20px;
        right: 20px;
        z-index: 1000;
        display: flex;
        flex-direction: column;
        gap: 15px;
    }

    .page-28dt__floating-btn {
        background-color: var(--color-primary);
        color: var(--color-text-light);
        padding: 12px 25px;
        border-radius: 30px;
        font-size: 1.1em;
        font-weight: bold;
        text-align: center;
        box-shadow: 0 4px 10px rgba(0, 0, 0, 0.4);
        transition: background-color 0.3s ease, transform 0.3s ease;
        cursor: pointer;
        border: none;
        min-width: 120px;
    }

    .page-28dt__floating-btn:hover {
        background-color: var(--color-secondary);
        transform: scale(1.05);
    }

    .page-28dt__floating-btn--login {
        background-color: var(--color-accent);
        color: var(--color-text-dark);
    }

    .page-28dt__floating-btn--login:hover {
        background-color: #f0c500;
    }

    /* About Section */
    .page-28dt__about-content {
        display: flex;
        flex-direction: column;
        gap: 20px;
        font-size: 1.1em;
        color: var(--color-light);
        text-align: justify;
    }

    /* Game Categories */
    .page-28dt__game-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 30px;
    }

    .page-28dt__game-card {
        background-color: var(--color-bg-light);
        border-radius: 12px;
        overflow: hidden;
        box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
        text-align: center;
        transition: transform 0.3s ease, box-shadow 0.3s ease;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        padding: 20px;
    }

    .page-28dt__game-card:hover {
        transform: translateY(-8px);
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    }

    .page-28dt__game-image-wrapper {
        width: 100%;
        max-width: 300px; /* Constraint for individual image */
        height: auto;
        overflow: hidden;
        margin-bottom: 20px;
        border-radius: 8px;
    }

    .page-28dt__game-image {
        width: 100%;
        height: auto;
        display: block;
        border-radius: 8px;
        object-fit: cover;
    }

    .page-28dt__game-title {
        font-size: 1.5em;
        color: var(--color-primary);
        margin-bottom: 10px;
        font-weight: bold;
    }

    .page-28dt__game-description {
        font-size: 0.95em;
        color: var(--color-light);
    }

    /* Promotions Section */
    .page-28dt__promo-list {
        display: flex;
        flex-direction: column;
        gap: 25px;
    }

    .page-28dt__promo-item {
        background-color: var(--color-bg-light);
        border-left: 5px solid var(--color-primary);
        padding: 25px;
        border-radius: 8px;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
        display: flex;
        align-items: center;
        gap: 20px;
    }

    .page-28dt__promo-icon {
        width: 80px;
        height: 80px;
        object-fit: cover;
        border-radius: 50%;
        flex-shrink: 0;
    }

    .page-28dt__promo-details h3 {
        font-size: 1.6em;
        color: var(--color-accent);
        margin-bottom: 8px;
    }

    .page-28dt__promo-details p {
        font-size: 1em;
        color: var(--color-light);
    }

    /* Why Choose Us Section */
    .page-28dt__features-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 25px;
        list-style: none;
        padding: 0;
        margin: 0;
    }

    .page-28dt__feature-item {
        background-color: var(--color-bg-light);
        padding: 25px;
        border-radius: 10px;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
        text-align: center;
        transition: transform 0.3s ease;
        box-sizing: border-box; /* Crucial for responsive lists */
    }

    .page-28dt__feature-item:hover {
        transform: translateY(-5px);
    }

    .page-28dt__feature-icon {
        width: 100px;
        height: 100px;
        object-fit: contain;
        margin-bottom: 15px;
    }

    .page-28dt__feature-title {
        font-size: 1.4em;
        color: var(--color-primary);
        margin-bottom: 10px;
    }

    .page-28dt__feature-description {
        font-size: 0.95em;
        color: var(--color-light);
    }

    /* Payment and Providers */
    .page-28dt__logo-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 20px;
        justify-items: center;
        align-items: center;
        padding: 20px 0;
    }

    .page-28dt__logo-item {
        background-color: var(--color-bg-light);
        padding: 15px;
        border-radius: 8px;
        display: flex;
        justify-content: center;
        align-items: center;
        width: 100%;
        max-width: 180px;
        height: 80px;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
        transition: transform 0.2s ease;
        box-sizing: border-box;
    }

    .page-28dt__logo-item:hover {
        transform: scale(1.05);
    }

    .page-28dt__logo-item img {
        max-width: 100%;
        max-height: 100%;
        object-fit: contain;
        display: block;
    }

    /* FAQ Section */
    .page-28dt__faq-container {
        max-width: 800px;
        margin: 0 auto;
    }

    .page-28dt__faq-item {
        background-color: var(--color-bg-light);
        margin-bottom: 15px;
        border-radius: 8px;
        overflow: hidden;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
        border: 1px solid var(--color-border);
    }

    .page-28dt__faq-question {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 18px 25px;
        cursor: pointer;
        background-color: #2a2a2a;
        transition: background-color 0.3s ease;
        user-select: none;
    }

    .page-28dt__faq-question:hover {
        background-color: #3a3a3a;
    }

    .page-28dt__faq-question h3 {
        margin: 0;
        font-size: 1.3em;
        color: var(--color-primary);
        pointer-events: none; /* Prevent h3 from blocking click event */
    }

    .page-28dt__faq-toggle {
        font-size: 1.8em;
        font-weight: bold;
        color: var(--color-accent);
        pointer-events: none; /* Prevent toggle icon from blocking click event */
        transition: transform 0.3s ease;
    }

    .page-28dt__faq-item.active .page-28dt__faq-toggle {
        transform: rotate(45deg);
    }

    .page-28dt__faq-answer {
        max-height: 0;
        overflow: hidden;
        padding: 0 25px;
        opacity: 0;
        transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
        color: var(--color-light);
        font-size: 1em;
    }

    .page-28dt__faq-item.active .page-28dt__faq-answer {
        max-height: 2000px !important; /* Sufficiently large */
        padding: 20px 25px !important;
        opacity: 1;
    }

    /* Call to Action */
    .page-28dt__cta-section {
        text-align: center;
        background-color: var(--color-primary);
        padding: 50px 20px;
        border-radius: 10px;
        margin-top: 40px;
        box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
    }

    .page-28dt__cta-title {
        font-size: 2.2em;
        color: var(--color-text-light);
        margin-bottom: 20px;
        font-weight: bold;
    }

    .page-28dt__cta-description {
        font-size: 1.2em;
        color: var(--color-light);
        margin-bottom: 30px;
        max-width: 700px;
        margin-left: auto;
        margin-right: auto;
    }

    .page-28dt__cta-button {
        display: inline-block;
        background-color: var(--color-accent);
        color: var(--color-text-dark);
        padding: 15px 35px;
        font-size: 1.3em;
        font-weight: bold;
        border-radius: 8px;
        text-decoration: none;
        transition: background-color 0.3s ease, transform 0.3s ease;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
        border: none;
        cursor: pointer;
    }

    .page-28dt__cta-button:hover {
        background-color: #f0c500;
        transform: translateY(-3px);
    }

    /* Responsive Design */
    @media (max-width: 1024px) {
        .page-28dt__hero-title {
            font-size: 3em;
        }
        .page-28dt__hero-description {
            font-size: 1.1em;
        }
        .page-28dt__section-title {
            font-size: 2em;
        }
    }

    @media (max-width: 768px) {
        .page-28dt__section {
            padding: 30px 15px;
        }

        .page-28dt__hero-section {
            min-height: 500px;
            padding-bottom: 60px;
        }

        .page-28dt__hero-title {
            font-size: 2.5em;
        }

        .page-28dt__hero-description {
            font-size: 1em;
        }

        .page-28dt__promo-link, .page-28dt__cta-button {
            padding: 12px 25px;
            font-size: 1.1em;
        }

        .page-28dt__section-title {
            font-size: 1.8em;
            margin-bottom: 25px;
        }

        .page-28dt__about-content {
            font-size: 1em;
        }

        .page-28dt__game-grid {
            grid-template-columns: 1fr;
        }

        .page-28dt__game-card {
            padding: 15px;
        }

        .page-28dt__game-title {
            font-size: 1.3em;
        }

        .page-28dt__promo-item {
            flex-direction: column;
            text-align: center;
            padding: 20px;
            gap: 15px;
        }

        .page-28dt__promo-icon {
            width: 60px;
            height: 60px;
        }

        .page-28dt__promo-details h3 {
            font-size: 1.4em;
        }

        .page-28dt__features-grid,
        .page-28dt__logo-grid {
            grid-template-columns: 1fr !important; /* Force single column */
            padding: 0 !important;
            margin-left: 0 !important;
            margin-right: 0 !important;
        }

        .page-28dt__feature-item,
        .page-28dt__logo-item {
            width: 100% !important;
            max-width: 100% !important;
            box-sizing: border-box !important;
            margin-left: 0 !important;
            margin-right: 0 !important;
            padding: 15px !important;
            word-wrap: break-word !important;
            overflow-wrap: break-word !important;
        }

        .page-28dt__feature-icon {
            width: 80px;
            height: 80px;
        }

        .page-28dt__faq-question {
            padding: 15px 20px;
        }

        .page-28dt__faq-question h3 {
            font-size: 1.1em;
        }

        .page-28dt__faq-toggle {
            font-size: 1.5em;
        }

        .page-28dt__faq-answer {
            padding: 15px 20px !important;
        }

        .page-28dt__cta-title {
            font-size: 1.8em;
        }

        .page-28dt__cta-description {
            font-size: 1em;
        }

        .page-28dt__floating-buttons {
            flex-direction: row;
            width: 100%;
            left: 0;
            right: 0;
            bottom: 0;
            justify-content: space-around;
            padding: 10px 0;
            background-color: rgba(0, 0, 0, 0.8);
            box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.5);
            border-top-left-radius: 10px;
            border-top-right-radius: 10px;
            gap: 0;
        }

        .page-28dt__floating-btn {
            flex: 1;
            margin: 0 5px;
            padding: 10px 0;
            font-size: 1em;
            border-radius: 20px;
            min-width: unset;
        }
        .page-28dt__floating-btn:first-child { margin-left: 10px; }
        .page-28dt__floating-btn:last-child { margin-right: 10px; }

        /* Ensure images are responsive on mobile */
        .page-28dt__game-image,
        .page-28dt__promo-icon,
        .page-28dt__feature-icon,
        .page-28dt__logo-item img {
            max-width: 100% !important;
            height: auto !important;
            box-sizing: border-box !important;
        }

        .page-28dt__game-image-wrapper {
            width: 100% !important;
            max-width: 100% !important;
            overflow: hidden !important;
            box-sizing: border-box !important;
        }
    }

    @media (max-width: 480px) {
        .page-28dt__hero-title {
            font-size: 2em;
        }
        .page-28dt__section-title {
            font-size: 1.6em;
        }
        .page-28dt__floating-btn {
            font-size: 0.9em;
            padding: 8px 0;
        }
    }