/* Tổng thể */
    .page-okfunapp {
        font-family: 'Arial', sans-serif;
        color: #333;
        line-height: 1.6;
        background-color: #f8f8f8;
        padding-bottom: 70px; /* Cho khoảng trống cho nút nổi */
    }

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

    /* Tiêu đề chính */
    .page-okfunapp__heading-primary {
        font-size: 2.5em;
        color: #d90000;
        text-align: center;
        margin-bottom: 20px;
        font-weight: bold;
        line-height: 1.2;
    }

    .page-okfunapp__heading-secondary {
        font-size: 2em;
        color: #222;
        margin-top: 40px;
        margin-bottom: 20px;
        text-align: center;
        position: relative;
        padding-bottom: 10px;
    }
    .page-okfunapp__heading-secondary::after {
        content: '';
        position: absolute;
        left: 50%;
        transform: translateX(-50%);
        bottom: 0;
        width: 60px;
        height: 3px;
        background-color: #d90000;
    }

    .page-okfunapp__heading-tertiary {
        font-size: 1.5em;
        color: #333;
        margin-top: 30px;
        margin-bottom: 15px;
        text-align: left;
    }

    /* Phần Hero */
    .page-okfunapp__hero-section {
        position: relative;
        background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.7)), url('[GALLERY:banner:okfun_app,mobile_gaming,promotion]') no-repeat center center/cover;
        color: #fff;
        text-align: center;
        padding: 80px 20px 60px 20px; /* Đã điều chỉnh padding-top để tránh header cố định */
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        min-height: 400px;
        box-sizing: border-box;
    }

    .page-okfunapp__hero-content {
        max-width: 800px;
        z-index: 10;
    }

    .page-okfunapp__hero-title {
        font-size: 3em;
        margin-bottom: 15px;
        color: #ffcc00;
        text-shadow: 2px 2px 4px rgba(0,0,0,0.7);
    }

    .page-okfunapp__hero-description {
        font-size: 1.2em;
        margin-bottom: 30px;
        color: #eee;
    }

    .page-okfunapp__primary-button {
        display: inline-block;
        background-color: #d90000;
        color: #fff;
        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-okfunapp__primary-button:hover {
        background-color: #a30000;
        transform: translateY(-2px);
    }

    /* Nút nổi đăng nhập/tải app */
    .page-okfunapp__floating-button {
        position: fixed;
        bottom: 20px;
        right: 20px;
        background-color: #ffcc00;
        color: #d90000;
        padding: 15px 25px;
        border-radius: 50px;
        text-decoration: none;
        font-weight: bold;
        font-size: 1.1em;
        box-shadow: 0 4px 10px rgba(0,0,0,0.2);
        z-index: 1000;
        display: flex;
        align-items: center;
        justify-content: center;
        transition: background-color 0.3s ease, transform 0.2s ease;
        border: none;
        cursor: pointer;
    }

    .page-okfunapp__floating-button:hover {
        background-color: #e6b800;
        transform: translateY(-3px);
    }
    .page-okfunapp__floating-button span {
        margin-right: 8px;
        font-size: 1.3em;
    }

    /* Phần giới thiệu */
    .page-okfunapp__intro-section {
        padding: 40px 0;
        background-color: #fff;
        text-align: center;
    }

    .page-okfunapp__intro-text {
        font-size: 1.1em;
        margin-bottom: 30px;
        max-width: 800px;
        margin-left: auto;
        margin-right: auto;
    }

    /* Danh mục trò chơi */
    .page-okfunapp__game-categories {
        padding: 40px 0;
        background-color: #f0f0f0;
    }

    .page-okfunapp__game-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 25px;
        margin-top: 30px;
    }

    .page-okfunapp__game-item {
        background-color: #fff;
        border-radius: 10px;
        box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        overflow: hidden;
        text-align: center;
        transition: transform 0.3s ease, box-shadow 0.3s ease;
        box-sizing: border-box;
        display: flex;
        flex-direction: column;
        justify-content: space-between;
    }

    .page-okfunapp__game-item:hover {
        transform: translateY(-5px);
        box-shadow: 0 6px 16px rgba(0,0,0,0.15);
    }

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

    .page-okfunapp__game-content {
        padding: 20px;
        flex-grow: 1;
        display: flex;
        flex-direction: column;
        justify-content: space-between;
    }

    .page-okfunapp__game-title {
        font-size: 1.3em;
        color: #d90000;
        margin-bottom: 10px;
        font-weight: bold;
    }

    .page-okfunapp__game-description {
        font-size: 0.95em;
        color: #555;
        margin-bottom: 15px;
    }

    /* Hướng dẫn tải app */
    .page-okfunapp__download-guide {
        padding: 40px 0;
        background-color: #fff;
    }

    .page-okfunapp__step-list {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 30px;
        margin-top: 30px;
    }

    .page-okfunapp__step-item {
        background-color: #f9f9f9;
        border: 1px solid #ddd;
        border-radius: 8px;
        padding: 25px;
        text-align: center;
        flex: 1 1 calc(33% - 30px); /* 3 cột trên desktop */
        max-width: calc(33% - 30px);
        box-shadow: 0 2px 8px rgba(0,0,0,0.05);
        transition: transform 0.3s ease;
        box-sizing: border-box;
    }
    .page-okfunapp__step-item:hover {
        transform: translateY(-3px);
    }

    .page-okfunapp__step-number {
        display: inline-block;
        background-color: #d90000;
        color: #fff;
        width: 45px;
        height: 45px;
        line-height: 45px;
        border-radius: 50%;
        font-size: 1.5em;
        font-weight: bold;
        margin-bottom: 15px;
    }

    .page-okfunapp__step-title {
        font-size: 1.2em;
        color: #222;
        margin-bottom: 10px;
        font-weight: bold;
    }

    .page-okfunapp__step-description {
        font-size: 1em;
        color: #666;
    }
    .page-okfunapp__download-image {
        max-width: 100%;
        height: auto;
        margin-top: 20px;
        border-radius: 8px;
        box-shadow: 0 4px 10px rgba(0,0,0,0.1);
        display: block;
        margin-left: auto;
        margin-right: auto;
    }

    /* Tính năng nổi bật */
    .page-okfunapp__features-section {
        padding: 40px 0;
        background-color: #f0f0f0;
    }

    .page-okfunapp__feature-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 25px;
        margin-top: 30px;
    }

    .page-okfunapp__feature-item {
        background-color: #fff;
        border-radius: 10px;
        box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        padding: 25px;
        text-align: center;
        transition: transform 0.3s ease, box-shadow 0.3s ease;
        box-sizing: border-box;
    }
    .page-okfunapp__feature-item:hover {
        transform: translateY(-5px);
        box-shadow: 0 6px 16px rgba(0,0,0,0.15);
    }

    .page-okfunapp__feature-icon {
        width: 200px; /* Đảm bảo tối thiểu 200px */
        height: auto; /* Giữ tỷ lệ */
        margin-bottom: 15px;
        object-fit: contain;
        max-width: 100%;
        display: block;
        margin-left: auto;
        margin-right: auto;
    }
    .page-okfunapp__feature-title {
        font-size: 1.3em;
        color: #d90000;
        margin-bottom: 10px;
        font-weight: bold;
    }

    .page-okfunapp__feature-description {
        font-size: 1em;
        color: #555;
    }

    /* FAQ */
    .page-okfunapp__faq-section {
        padding: 40px 0;
        background-color: #fff;
    }

    .page-okfunapp__faq-list {
        max-width: 800px;
        margin: 30px auto 0 auto;
        border-radius: 8px;
        overflow: hidden;
        box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    }

    .page-okfunapp__faq-item {
        border-bottom: 1px solid #eee;
    }
    .page-okfunapp__faq-item:last-child {
        border-bottom: none;
    }

    .page-okfunapp__faq-question {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 20px 25px;
        background-color: #fefefe;
        cursor: pointer;
        user-select: none;
        transition: background-color 0.3s ease;
        box-sizing: border-box;
    }

    .page-okfunapp__faq-question:hover {
        background-color: #f5f5f5;
    }

    .page-okfunapp__faq-question h3 {
        margin: 0;
        font-size: 1.15em;
        color: #333;
        pointer-events: none; /* Ngăn chặn h3 chặn sự kiện click */
        flex-grow: 1;
        text-align: left;
    }

    .page-okfunapp__faq-toggle {
        font-size: 1.8em;
        color: #d90000;
        font-weight: bold;
        margin-left: 15px;
        transition: transform 0.3s ease;
        pointer-events: none; /* Ngăn chặn icon chặn sự kiện click */
    }

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

    .page-okfunapp__faq-answer {
        max-height: 0;
        overflow: hidden;
        padding: 0 25px;
        background-color: #fcfcfc;
        transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
        opacity: 0;
        color: #555;
        font-size: 1em;
        box-sizing: border-box;
        text-align: left;
    }

    .page-okfunapp__faq-item.active .page-okfunapp__faq-answer {
        max-height: 2000px !important; /* Đủ lớn để chứa mọi nội dung */
        padding: 20px 25px !important;
        opacity: 1;
    }
    .page-okfunapp__faq-answer p {
        margin: 0;
        padding-bottom: 10px;
    }
    .page-okfunapp__faq-answer p:last-child {
        padding-bottom: 0;
    }


    /* Call to Action cuối trang */
    .page-okfunapp__cta-section {
        padding: 50px 0;
        text-align: center;
        background-color: #d90000;
        color: #fff;
        margin-top: 40px;
    }

    .page-okfunapp__cta-title {
        font-size: 2em;
        margin-bottom: 15px;
        color: #ffcc00;
    }

    .page-okfunapp__cta-description {
        font-size: 1.1em;
        margin-bottom: 30px;
        max-width: 800px;
        margin-left: auto;
        margin-right: auto;
    }

    /* Responsive */
    @media (max-width: 992px) {
        .page-okfunapp__heading-primary {
            font-size: 2em;
        }
        .page-okfunapp__hero-title {
            font-size: 2.5em;
        }
        .page-okfunapp__step-item {
            flex: 1 1 calc(50% - 30px); /* 2 cột trên tablet */
            max-width: calc(50% - 30px);
        }
    }

    @media (max-width: 768px) {
        .page-okfunapp__hero-section {
            padding: 60px 15px 40px 15px; /* Điều chỉnh padding-top cho mobile */
            min-height: 300px;
        }
        .page-okfunapp__hero-title {
            font-size: 2em;
        }
        .page-okfunapp__hero-description {
            font-size: 1em;
        }
        .page-okfunapp__primary-button {
            padding: 12px 25px;
            font-size: 1em;
        }
        .page-okfunapp__floating-button {
            bottom: 15px;
            right: 15px;
            padding: 12px 20px;
            font-size: 0.95em;
        }
        .page-okfunapp__floating-button span {
            font-size: 1.1em;
        }

        .page-okfunapp__heading-primary {
            font-size: 1.8em;
        }
        .page-okfunapp__heading-secondary {
            font-size: 1.6em;
            margin-top: 30px;
        }
        .page-okfunapp__heading-tertiary {
            font-size: 1.3em;
            margin-top: 25px;
        }
        .page-okfunapp__intro-text,
        .page-okfunapp__game-description,
        .page-okfunapp__step-description,
        .page-okfunapp__feature-description,
        .page-okfunapp__faq-answer p,
        .page-okfunapp__cta-description {
            font-size: 0.95em;
        }

        .page-okfunapp__game-grid,
        .page-okfunapp__feature-grid {
            grid-template-columns: 1fr;
            gap: 20px;
        }

        .page-okfunapp__game-item,
        .page-okfunapp__feature-item,
        .page-okfunapp__step-item {
            width: 100% !important;
            max-width: 100% !important;
            box-sizing: border-box !important;
            margin-left: 0 !important;
            margin-right: 0 !important;
            padding: 20px !important;
            word-wrap: break-word !important;
            overflow-wrap: break-word !important;
            word-break: break-word !important;
        }
        .page-okfunapp__step-list {
            flex-direction: column;
            align-items: center;
            gap: 20px;
        }
        .page-okfunapp__game-image,
        .page-okfunapp__download-image,
        .page-okfunapp__feature-icon {
            max-width: 100% !important;
            height: auto !important;
            box-sizing: border-box !important;
        }

        .page-okfunapp__faq-question {
            padding: 15px 20px;
        }
        .page-okfunapp__faq-question h3 {
            font-size: 1.05em;
        }
        .page-okfunapp__faq-toggle {
            font-size: 1.5em;
        }
        .page-okfunapp__faq-answer {
            padding: 15px 20px;
        }
        .page-okfunapp__faq-list {
            margin: 20px 0 0 0;
            box-shadow: none;
            border-radius: 0;
        }
        .page-okfunapp__container {
            padding: 0 10px;
        }
    }
    @media (max-width: 480px) {
        .page-okfunapp__hero-title {
            font-size: 1.8em;
        }
        .page-okfunapp__heading-primary {
            font-size: 1.6em;
        }
        .page-okfunapp__floating-button {
            bottom: 10px;
            right: 10px;
            padding: 10px 18px;
            font-size: 0.9em;
        }
    }