/* Tổng quan */
    :root {
        --page-99ok-primary-color: #e94560; /* Màu đỏ hồng */
        --page-99ok-secondary-color: #00a8e8; /* Màu xanh dương */
        --page-99ok-dark-bg: #1a1a2e; /* Nền tối */
        --page-99ok-light-text: #e0e0e0; /* Chữ sáng */
        --page-99ok-accent-bg: #272744; /* Nền nhấn */
        --page-99ok-border-color: #3a3a5e; /* Màu viền */
    }

    .page-99ok {
        font-family: 'Arial', sans-serif;
        color: var(--page-99ok-light-text);
        background-color: var(--page-99ok-dark-bg);
        line-height: 1.6;
        overflow-x: hidden;
    }

    .page-99ok__container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 15px;
    }

    .page-99ok__section {
        padding: 40px 0;
        text-align: center;
    }

    .page-99ok__section--dark {
        background-color: var(--page-99ok-accent-bg);
    }

    .page-99ok__title {
        color: var(--page-99ok-primary-color);
        font-size: 2.5em;
        margin-bottom: 20px;
        text-transform: uppercase;
    }

    .page-99ok__subtitle {
        color: var(--page-99ok-secondary-color);
        font-size: 1.8em;
        margin-bottom: 15px;
    }

    .page-99ok__text {
        font-size: 1.1em;
        margin-bottom: 20px;
    }

    .page-99ok__button {
        display: inline-block;
        background-color: var(--page-99ok-primary-color);
        color: #ffffff;
        padding: 12px 25px;
        border-radius: 5px;
        text-decoration: none;
        font-weight: bold;
        transition: background-color 0.3s ease, transform 0.3s ease;
        border: none;
        cursor: pointer;
        font-size: 1.1em;
    }

    .page-99ok__button:hover {
        background-color: #c4344d;
        transform: translateY(-2px);
    }

    /* Hero Section */
    .page-99ok__hero-section {
        position: relative;
        text-align: center;
        padding-top: 10px; /* Cho khoảng cách với header cố định */
        padding-bottom: 40px;
        background-color: var(--page-99ok-dark-bg);
    }

    .page-99ok__hero-image-wrapper {
        width: 100%;
        max-width: 100%;
        overflow: hidden;
        box-sizing: border-box;
    }

    .page-99ok__hero-image {
        width: 100%;
        max-width: 100%;
        height: auto;
        display: block;
        margin: 0 auto;
        border-radius: 8px;
    }

    .page-99ok__hero-content {
        position: relative;
        z-index: 2;
        padding: 20px 15px;
        margin-top: -80px; /* Dịch lên trên ảnh một chút */
        background: linear-gradient(to top, var(--page-99ok-dark-bg), transparent);
    }

    .page-99ok__hero-title {
        font-size: 2.8em;
        color: #ffffff;
        margin-bottom: 10px;
        line-height: 1.2;
        text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
    }
    .page-99ok__hero-title strong {
        color: var(--page-99ok-primary-color);
    }

    .page-99ok__hero-description {
        font-size: 1.2em;
        color: var(--page-99ok-light-text);
        margin-bottom: 25px;
        max-width: 800px;
        margin-left: auto;
        margin-right: auto;
        text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
    }

    /* Floating Login Button */
    .page-99ok__floating-button {
        position: fixed;
        bottom: 20px;
        right: 20px;
        z-index: 1000;
        background-color: var(--page-99ok-primary-color);
        color: #ffffff;
        padding: 15px 25px;
        border-radius: 50px;
        text-decoration: none;
        font-weight: bold;
        font-size: 1.2em;
        box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
        transition: background-color 0.3s ease, transform 0.3s ease;
        display: flex;
        align-items: center;
        justify-content: center;
        text-align: center;
        animation: page-99ok__pulse 2s infinite;
    }

    .page-99ok__floating-button:hover {
        background-color: #c4344d;
        transform: scale(1.05);
    }

    @keyframes page-99ok__pulse {
        0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(233, 69, 96, 0.7); }
        70% { transform: scale(1.05); box-shadow: 0 0 0 10px rgba(233, 69, 96, 0); }
        100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(233, 69, 96, 0); }
    }

    /* About Section */
    .page-99ok__about-section .page-99ok__text {
        max-width: 800px;
        margin-left: auto;
        margin-right: auto;
    }

    /* Game Categories */
    .page-99ok__game-categories {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 25px;
        margin-top: 30px;
    }

    .page-99ok__game-card {
        background-color: var(--page-99ok-accent-bg);
        border-radius: 10px;
        overflow: hidden;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
        transition: transform 0.3s ease, box-shadow 0.3s ease;
        text-align: left;
        display: flex;
        flex-direction: column;
    }

    .page-99ok__game-card:hover {
        transform: translateY(-5px);
        box-shadow: 0 8px 20px rgba(0, 0, 0, 0.5);
    }

    .page-99ok__game-card-image-wrapper {
        width: 100%;
        max-width: 100%;
        overflow: hidden;
        box-sizing: border-box;
    }

    .page-99ok__game-card-image {
        width: 100%;
        height: 200px; /* Kích thước cố định cho hình ảnh thẻ game */
        object-fit: cover;
        display: block;
    }

    .page-99ok__game-card-content {
        padding: 20px;
        flex-grow: 1;
        display: flex;
        flex-direction: column;
    }

    .page-99ok__game-card-title {
        font-size: 1.5em;
        color: var(--page-99ok-primary-color);
        margin-bottom: 10px;
        flex-grow: 1;
    }

    .page-99ok__game-card-description {
        font-size: 0.95em;
        color: var(--page-99ok-light-text);
        margin-bottom: 15px;
    }

    .page-99ok__game-card-link {
        display: inline-block;
        background-color: var(--page-99ok-secondary-color);
        color: #ffffff;
        padding: 8px 15px;
        border-radius: 5px;
        text-decoration: none;
        font-weight: bold;
        font-size: 0.9em;
        align-self: flex-start;
        transition: background-color 0.3s ease;
    }

    .page-99ok__game-card-link:hover {
        background-color: #008cc9;
    }

    /* Promotions Section */
    .page-99ok__promotions-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 25px;
        margin-top: 30px;
    }

    .page-99ok__promo-card {
        background-color: var(--page-99ok-accent-bg);
        border-radius: 10px;
        padding: 25px;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
        transition: transform 0.3s ease, box-shadow 0.3s ease;
        text-align: center;
    }

    .page-99ok__promo-card:hover {
        transform: translateY(-5px);
        box-shadow: 0 8px 20px rgba(0, 0, 0, 0.5);
    }

    .page-99ok__promo-card-title {
        font-size: 1.8em;
        color: var(--page-99ok-primary-color);
        margin-bottom: 15px;
    }

    .page-99ok__promo-card-text {
        font-size: 1em;
        color: var(--page-99ok-light-text);
        margin-bottom: 20px;
    }

    /* How To Section */
    .page-99ok__steps-list {
        list-style: none;
        padding: 0;
        margin-top: 30px;
        display: flex;
        flex-direction: column;
        gap: 20px;
        max-width: 800px;
        margin-left: auto;
        margin-right: auto;
    }

    .page-99ok__step-item {
        background-color: var(--page-99ok-accent-bg);
        border-radius: 8px;
        padding: 20px;
        text-align: left;
        display: flex;
        align-items: center;
        gap: 15px;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    }

    .page-99ok__step-number {
        background-color: var(--page-99ok-primary-color);
        color: #ffffff;
        width: 40px;
        height: 40px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.5em;
        font-weight: bold;
        flex-shrink: 0;
    }

    .page-99ok__step-content h3 {
        color: var(--page-99ok-secondary-color);
        margin-top: 0;
        margin-bottom: 5px;
        font-size: 1.3em;
    }

    .page-99ok__step-content p {
        margin: 0;
        font-size: 1em;
    }

    /* FAQ Section */
    .page-99ok__faq-section {
        text-align: left;
    }

    .page-99ok__faq-list {
        margin-top: 30px;
        max-width: 900px;
        margin-left: auto;
        margin-right: auto;
    }

    .page-99ok__faq-item {
        background-color: var(--page-99ok-accent-bg);
        border-radius: 8px;
        margin-bottom: 15px;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
        border: 1px solid var(--page-99ok-border-color);
    }

    .page-99ok__faq-question {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 15px 20px;
        cursor: pointer;
        user-select: none;
        background-color: #2e2e4a;
        border-radius: 8px;
        transition: background-color 0.3s ease;
    }

    .page-99ok__faq-question:hover {
        background-color: #3a3a5e;
    }

    .page-99ok__faq-question h3 {
        margin: 0;
        font-size: 1.2em;
        color: var(--page-99ok-light-text);
        pointer-events: none; /* Ngăn chặn h3 chặn sự kiện click */
    }

    .page-99ok__faq-toggle {
        font-size: 1.8em;
        font-weight: bold;
        color: var(--page-99ok-primary-color);
        transition: transform 0.3s ease;
        pointer-events: none; /* Ngăn chặn toggle chặn sự kiện click */
    }

    .page-99ok__faq-item.active .page-99ok__faq-toggle {
        transform: rotate(45deg); /* Biến đổi '+' thành 'x' hoặc '-' */
    }

    .page-99ok__faq-answer {
        max-height: 0;
        overflow: hidden;
        padding: 0 20px;
        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(--page-99ok-light-text);
        font-size: 0.95em;
    }

    .page-99ok__faq-item.active .page-99ok__faq-answer {
        max-height: 2000px !important; /* Đủ lớn để chứa mọi nội dung */
        padding: 20px !important;
        opacity: 1;
    }
    .page-99ok__faq-answer p {
        margin-top: 0;
        margin-bottom: 1em;
    }
    .page-99ok__faq-answer p:last-child {
        margin-bottom: 0;
    }


    /* Responsive Design */
    @media (max-width: 768px) {
        .page-99ok__hero-section {
            padding-top: 10px; /* Cho khoảng cách với header cố định trên mobile */
            padding-bottom: 20px;
        }
        .page-99ok__hero-title {
            font-size: 2em;
        }
        .page-99ok__hero-description {
            font-size: 1em;
        }
        .page-99ok__title {
            font-size: 2em;
        }
        .page-99ok__subtitle {
            font-size: 1.5em;
        }
        .page-99ok__text {
            font-size: 0.95em;
        }
        .page-99ok__button {
            padding: 10px 20px;
            font-size: 1em;
        }
        .page-99ok__floating-button {
            bottom: 15px;
            right: 15px;
            padding: 12px 20px;
            font-size: 1em;
        }
        .page-99ok__game-categories {
            grid-template-columns: 1fr;
        }
        .page-99ok__game-card-image {
            height: 180px;
        }
        .page-99ok__game-card-title {
            font-size: 1.3em;
        }
        .page-99ok__promotions-grid {
            grid-template-columns: 1fr;
        }
        .page-99ok__promo-card-title {
            font-size: 1.5em;
        }
        .page-99ok__step-item {
            flex-direction: column;
            text-align: center;
            gap: 10px;
        }
        .page-99ok__step-number {
            margin-bottom: 10px;
        }
        .page-99ok__faq-question {
            padding: 12px 15px;
        }
        .page-99ok__faq-question h3 {
            font-size: 1.1em;
        }
        .page-99ok__faq-answer {
            padding: 0 15px;
        }
        .page-99ok__faq-item.active .page-99ok__faq-answer {
            padding: 15px !important;
        }

        /* Responsive image optimization */
        .page-99ok img {
            max-width: 100% !important;
            height: auto !important;
        }
        .page-99ok__game-card-image-wrapper,
        .page-99ok__hero-image-wrapper {
            width: 100% !important;
            max-width: 100% !important;
            overflow: hidden !important;
            box-sizing: border-box !important;
        }
    }