/* Reset và biến cơ bản cho trang */
    .page-truc-tiep-c3 {
        font-family: 'Arial', sans-serif;
        color: #333;
        line-height: 1.6;
        background-color: #f4f7f6;
        overflow-x: hidden;
    }

    .page-truc-tiep-c3__container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 15px;
        box-sizing: border-box;
    }

    /* Tiêu đề chung */
    .page-truc-tiep-c3__heading-primary {
        font-size: 2.8em;
        color: #c0392b; /* Màu đỏ sẫm */
        text-align: center;
        margin-bottom: 20px;
        font-weight: bold;
        text-shadow: 1px 1px 2px rgba(0,0,0,0.1);
    }

    .page-truc-tiep-c3__heading-secondary {
        font-size: 2.2em;
        color: #2c3e50; /* Màu xanh đen */
        text-align: center;
        margin: 40px 0 25px;
        font-weight: bold;
    }

    .page-truc-tiep-c3__heading-tertiary {
        font-size: 1.6em;
        color: #34495e;
        margin: 30px 0 15px;
        font-weight: bold;
    }

    /* Hero Section */
    .page-truc-tiep-c3__hero-section {
        position: relative;
        width: 100%;
        height: 60vh; /* Chiều cao tương đối */
        display: flex;
        align-items: center;
        justify-content: center;
        text-align: center;
        color: #fff;
        overflow: hidden;
        padding-top: 10px; /* Adjust for fixed header */
        min-height: 400px;
        box-sizing: border-box;
    }

    .page-truc-tiep-c3__hero-background {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        object-fit: cover;
        z-index: -1;
        filter: brightness(0.6); /* Làm tối ảnh nền để chữ dễ đọc */
    }

    .page-truc-tiep-c3__hero-content {
        z-index: 1;
        max-width: 900px;
        padding: 20px;
        background: rgba(0, 0, 0, 0.4);
        border-radius: 10px;
    }

    .page-truc-tiep-c3__hero-title {
        font-size: 3.5em;
        margin-bottom: 15px;
        font-weight: bold;
        line-height: 1.2;
        color: #f1c40f; /* Vàng sáng */
    }

    .page-truc-tiep-c3__hero-subtitle {
        font-size: 1.5em;
        margin-bottom: 30px;
        color: #ecf0f1;
    }

    .page-truc-tiep-c3__cta-button {
        display: inline-block;
        padding: 15px 35px;
        background-color: #e74c3c; /* Màu đỏ cam */
        color: #fff;
        text-decoration: none;
        border-radius: 50px;
        font-size: 1.2em;
        font-weight: bold;
        transition: background-color 0.3s ease, transform 0.3s ease;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    }

    .page-truc-tiep-c3__cta-button:hover {
        background-color: #c0392b; /* Đỏ sẫm hơn */
        transform: translateY(-3px);
    }

    /* Phần giới thiệu */
    .page-truc-tiep-c3__intro-section {
        padding: 60px 0;
        background-color: #fff;
        text-align: center;
    }

    .page-truc-tiep-c3__intro-text {
        font-size: 1.1em;
        color: #555;
        max-width: 800px;
        margin: 0 auto 30px;
    }

    /* Phần tính năng/lợi ích */
    .page-truc-tiep-c3__features-section {
        padding: 60px 0;
        background-color: #f9f9f9;
    }

    .page-truc-tiep-c3__features-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 30px;
        margin-top: 40px;
    }

    .page-truc-tiep-c3__feature-card {
        background-color: #fff;
        border-radius: 10px;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
        padding: 30px;
        text-align: center;
        transition: transform 0.3s ease, box-shadow 0.3s ease;
        box-sizing: border-box;
    }

    .page-truc-tiep-c3__feature-card:hover {
        transform: translateY(-10px);
        box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    }

    .page-truc-tiep-c3__feature-icon {
        width: 100%;
        max-width: 250px; /* Tăng kích thước ảnh */
        height: auto;
        margin-bottom: 20px;
        border-radius: 8px;
        box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    }

    .page-truc-tiep-c3__feature-title {
        font-size: 1.5em;
        color: #c0392b;
        margin-bottom: 15px;
    }

    .page-truc-tiep-c3__feature-description {
        font-size: 1em;
        color: #666;
    }

    /* Phần cách thức tham gia */
    .page-truc-tiep-c3__how-to-join-section {
        padding: 60px 0;
        background-color: #ecf0f1;
        text-align: center;
    }

    .page-truc-tiep-c3__steps-grid {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 30px;
        margin-top: 40px;
    }

    .page-truc-tiep-c3__step-item {
        background-color: #fff;
        border-radius: 10px;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
        padding: 30px;
        text-align: center;
        flex: 1;
        min-width: 280px;
        max-width: 350px;
        position: relative;
        box-sizing: border-box;
    }

    .page-truc-tiep-c3__step-number {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 50px;
        height: 50px;
        background-color: #e74c3c;
        color: #fff;
        border-radius: 50%;
        font-size: 1.8em;
        font-weight: bold;
        margin-bottom: 20px;
        box-shadow: 0 2px 8px rgba(0,0,0,0.2);
    }

    .page-truc-tiep-c3__step-title {
        font-size: 1.4em;
        color: #2c3e50;
        margin-bottom: 10px;
    }

    .page-truc-tiep-c3__step-description {
        font-size: 1em;
        color: #666;
    }

    /* Phần nhà cung cấp game */
    .page-truc-tiep-c3__providers-section {
        padding: 60px 0;
        background-color: #fff;
        text-align: center;
    }

    .page-truc-tiep-c3__providers-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
        gap: 25px;
        margin-top: 40px;
    }

    .page-truc-tiep-c3__provider-logo {
        width: 100%;
        max-width: 200px;
        height: auto;
        object-fit: contain;
        padding: 15px;
        background-color: #fefefe;
        border-radius: 8px;
        box-shadow: 0 2px 10px rgba(0,0,0,0.05);
        transition: transform 0.2s ease;
        box-sizing: border-box;
    }

    .page-truc-tiep-c3__provider-logo:hover {
        transform: scale(1.05);
    }

    /* FAQ Section */
    .page-truc-tiep-c3__faq-section {
        padding: 60px 0;
        background-color: #f4f7f6;
    }

    .page-truc-tiep-c3__faq-list {
        max-width: 900px;
        margin: 40px auto 0;
    }

    .page-truc-tiep-c3__faq-item {
        background-color: #fff;
        border-radius: 8px;
        margin-bottom: 15px;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
        overflow: hidden;
    }

    .page-truc-tiep-c3__faq-question {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 20px 25px;
        cursor: pointer;
        background-color: #e74c3c; /* Màu đỏ cam */
        color: #fff;
        font-weight: bold;
        transition: background-color 0.3s ease;
    }

    .page-truc-tiep-c3__faq-question:hover {
        background-color: #c0392b; /* Đỏ sẫm hơn */
    }

    .page-truc-tiep-c3__faq-question h3 {
        margin: 0;
        font-size: 1.2em;
        flex-grow: 1;
        text-align: left;
        color: #fff; /* Đảm bảo màu chữ trắng */
        pointer-events: none; /* Ngăn chặn sự kiện click trên h3 */
    }

    .page-truc-tiep-c3__faq-toggle {
        font-size: 1.8em;
        line-height: 1;
        margin-left: 15px;
        width: 25px;
        text-align: center;
        pointer-events: none; /* Ngăn chặn sự kiện click trên toggle */
    }

    .page-truc-tiep-c3__faq-answer {
        max-height: 0;
        overflow: hidden;
        padding: 0 25px; /* Điều chỉnh padding cho câu trả lời */
        opacity: 0;
        transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
        background-color: #fefefe;
        color: #333;
    }

    .page-truc-tiep-c3__faq-item.active .page-truc-tiep-c3__faq-answer {
        max-height: 2000px !important; /* Đủ lớn để chứa mọi nội dung */
        padding: 20px 25px !important; /* Padding khi mở */
        opacity: 1;
    }

    .page-truc-tiep-c3__faq-item.active .page-truc-tiep-c3__faq-question {
        background-color: #c0392b; /* Màu khi mở */
    }

    /* Phần khuyến mãi */
    .page-truc-tiep-c3__promo-section {
        padding: 60px 0;
        background-image: linear-gradient(135deg, #f1c40f, #e74c3c);
        color: #fff;
        text-align: center;
    }

    .page-truc-tiep-c3__promo-title {
        font-size: 2.5em;
        margin-bottom: 20px;
        font-weight: bold;
    }

    .page-truc-tiep-c3__promo-description {
        font-size: 1.2em;
        margin-bottom: 30px;
        max-width: 800px;
        margin-left: auto;
        margin-right: auto;
    }

    /* Floating Buttons */
    .page-truc-tiep-c3__floating-buttons {
        position: fixed;
        bottom: 20px;
        right: 20px;
        display: flex;
        flex-direction: column;
        gap: 10px;
        z-index: 1000;
    }

    .page-truc-tiep-c3__floating-button {
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 12px 25px;
        border-radius: 50px;
        font-size: 1.1em;
        font-weight: bold;
        text-decoration: none;
        color: #fff;
        cursor: pointer;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
        transition: transform 0.3s ease, background-color 0.3s ease;
        min-width: 120px;
        text-align: center; /* Ensure text is centered within button */
    }

    .page-truc-tiep-c3__floating-button--register {
        background-image: linear-gradient(45deg, #ff6b6b, #ee0979); /* Reddish gradient */
    }

    .page-truc-tiep-c3__floating-button--login {
        background-image: linear-gradient(45deg, #4facfe, #00f2fe); /* Bluish gradient */
    }

    .page-truc-tiep-c3__floating-button:hover {
        transform: translateY(-3px);
        opacity: 0.9;
    }

    /* Responsive Design */
    @media (max-width: 1024px) {
        .page-truc-tiep-c3__hero-title {
            font-size: 3em;
        }
        .page-truc-tiep-c3__hero-subtitle {
            font-size: 1.3em;
        }
        .page-truc-tiep-c3__heading-primary {
            font-size: 2.4em;
        }
        .page-truc-tiep-c3__heading-secondary {
            font-size: 1.8em;
        }
        .page-truc-tiep-c3__features-grid,
        .page-truc-tiep-c3__providers-grid {
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        }
    }

    @media (max-width: 768px) {
        .page-truc-tiep-c3__hero-section {
            height: 50vh;
            min-height: 350px;
        }
        .page-truc-tiep-c3__hero-title {
            font-size: 2.5em;
        }
        .page-truc-tiep-c3__hero-subtitle {
            font-size: 1.1em;
        }
        .page-truc-tiep-c3__cta-button {
            padding: 12px 25px;
            font-size: 1.1em;
        }
        .page-truc-tiep-c3__heading-primary {
            font-size: 2em;
        }
        .page-truc-tiep-c3__heading-secondary {
            font-size: 1.6em;
            margin: 30px 0 20px;
        }
        .page-truc-tiep-c3__heading-tertiary {
            font-size: 1.4em;
            margin: 25px 0 12px;
        }
        .page-truc-tiep-c3__intro-section,
        .page-truc-tiep-c3__features-section,
        .page-truc-tiep-c3__how-to-join-section,
        .page-truc-tiep-c3__providers-section,
        .page-truc-tiep-c3__faq-section,
        .page-truc-tiep-c3__promo-section {
            padding: 40px 0;
        }

        /* List item responsive adjustments */
        .page-truc-tiep-c3__features-grid,
        .page-truc-tiep-c3__steps-grid,
        .page-truc-tiep-c3__providers-grid {
            grid-template-columns: 1fr;
            gap: 20px;
            padding: 0 15px; /* Adjust container padding */
            width: 100% !important;
            max-width: 100% !important;
            box-sizing: border-box !important;
            margin-left: 0 !important;
            margin-right: 0 !important;
        }

        .page-truc-tiep-c3__feature-card,
        .page-truc-tiep-c3__step-item,
        .page-truc-tiep-c3__provider-logo {
            width: 100% !important;
            max-width: 100% !important;
            box-sizing: border-box !important;
            margin-left: 0 !important;
            margin-right: 0 !important;
            padding: 20px; /* Adjust padding for smaller screens */
        }

        .page-truc-tiep-c3__feature-description,
        .page-truc-tiep-c3__step-description {
            word-wrap: break-word !important;
            overflow-wrap: break-word !important;
            word-break: break-word !important;
        }
        
        /* Images responsive */
        .page-truc-tiep-c3__feature-icon,
        .page-truc-tiep-c3__provider-logo,
        .page-truc-tiep-c3__hero-background {
            max-width: 100% !important;
            height: auto !important;
            box-sizing: border-box !important;
        }
        .page-truc-tiep-c3__feature-icon {
            max-width: 200px; /* Smaller max width for icons on mobile */
            margin: 0 auto 15px;
        }

        /* FAQ responsive */
        .page-truc-tiep-c3__faq-list {
            padding: 0 15px;
        }
        .page-truc-tiep-c3__faq-question {
            padding: 15px 20px;
            font-size: 1em;
        }
        .page-truc-tiep-c3__faq-question h3 {
            font-size: 1.1em;
        }
        .page-truc-tiep-c3__faq-toggle {
            font-size: 1.5em;
        }
        .page-truc-tiep-c3__faq-answer {
            padding: 0 20px;
        }
        .page-truc-tiep-c3__faq-item.active .page-truc-tiep-c3__faq-answer {
            padding: 15px 20px !important;
        }

        /* Floating buttons responsive */
        .page-truc-tiep-c3__floating-buttons {
            flex-direction: row;
            width: calc(100% - 30px); /* Adjust width */
            left: 15px;
            right: 15px;
            bottom: 15px;
            justify-content: space-around;
            gap: 8px;
        }
        .page-truc-tiep-c3__floating-button {
            flex: 1;
            padding: 10px 10px;
            font-size: 0.9em;
            min-width: unset;
        }
        .page-truc-tiep-c3__promo-title {
            font-size: 2em;
        }
        .page-truc-tiep-c3__promo-description {
            font-size: 1.1em;
        }
    }

    @media (max-width: 480px) {
        .page-truc-tiep-c3__hero-title {
            font-size: 2em;
        }
        .page-truc-tiep-c3__hero-subtitle {
            font-size: 1em;
        }
        .page-truc-tiep-c3__cta-button {
            padding: 10px 20px;
            font-size: 1em;
        }
        .page-truc-tiep-c3__heading-primary {
            font-size: 1.8em;
        }
        .page-truc-tiep-c3__heading-secondary {
            font-size: 1.4em;
        }
        .page-truc-tiep-c3__feature-title {
            font-size: 1.3em;
        }
        .page-truc-tiep-c3__step-title {
            font-size: 1.2em;
        }
    }