.page-khuyen-mai {
    font-family: Arial, sans-serif;
    color: #1F2D3D; /* Text Main */
    background-color: #F4F7FB; /* Background */
}

.page-khuyen-mai__hero-section {
    padding-top: 10px; /* Small top padding as body handles header offset */
    padding-bottom: 40px;
    background-color: #F4F7FB; /* Background */
}

.page-khuyen-mai__hero-container {
    max-width: 1170px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    padding: 40px 16px;
    gap: 24px;
}

.page-khuyen-mai__hero-content {
    flex: 1 1 50%;
    max-width: 50%;
    padding-right: 20px;
}

.page-khuyen-mai__main-title {
    font-size: clamp(2em, 4vw, 2.8em);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 16px;
    color: #1F2D3D; /* Text Main */
}

.page-khuyen-mai__hero-description {
    font-size: 1.1em;
    line-height: 1.6;
    margin-bottom: 24px;
    color: #1F2D3D; /* Text Main */
}

.page-khuyen-mai__cta-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.page-khuyen-mai__btn-primary,
.page-khuyen-mai__btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 25px;
    border-radius: 8px;
    font-size: 1em;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    white-space: normal; /* Allow text wrapping */
    word-wrap: break-word; /* Allow text wrapping */
    box-sizing: border-box;
    max-width: 100%;
}

.page-khuyen-mai__btn-primary {
    background: linear-gradient(180deg, #4A8BFF 0%, #2F6BFF 100%);
    color: #ffffff;
    border: 2px solid transparent;
}

.page-khuyen-mai__btn-primary:hover {
    background: linear-gradient(180deg, #2F6BFF 0%, #4A8BFF 100%);
    transform: translateY(-2px);
}

.page-khuyen-mai__btn-secondary {
    background-color: #ffffff;
    color: #2F6BFF;
    border: 2px solid #2F6BFF;
}

.page-khuyen-mai__btn-secondary:hover {
    background-color: #F4F7FB;
    color: #2F6BFF;
    transform: translateY(-2px);
}

.page-khuyen-mai__hero-image {
    flex: 1 1 45%;
    text-align: center;
    max-width: 45%;
}

.page-khuyen-mai__hero-image img {
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: 12px;
}

.page-khuyen-mai__intro-section,
.page-khuyen-mai__guide-section,
.page-khuyen-mai__faq-section {
    padding: 60px 0;
    background-color: #F4F7FB; /* Background */
}

.page-khuyen-mai__promo-types-section,
.page-khuyen-mai__terms-section,
.page-khuyen-mai__cta-final-section {
    padding: 60px 0;
    background-color: #2F6BFF; /* Main Color */
    color: #ffffff;
}

.page-khuyen-mai__content-area {
    max-width: 1170px;
    margin: 0 auto;
    padding: 0 16px;
}

.page-khuyen-mai__section-title {
    font-size: 2.2em;
    font-weight: 700;
    text-align: center;
    margin-bottom: 40px;
    color: inherit; /* Inherit color from parent section */
}

.page-khuyen-mai__intro-section .page-khuyen-mai__section-title,
.page-khuyen-mai__guide-section .page-khuyen-mai__section-title,
.page-khuyen-mai__faq-section .page-khuyen-mai__section-title {
    color: #1F2D3D; /* Text Main for light sections */
}

.page-khuyen-mai__text-block {
    font-size: 1.05em;
    line-height: 1.7;
    margin-bottom: 20px;
    text-align: justify;
    color: inherit;
}

.page-khuyen-mai__text-link {
    color: #6FA3FF; /* Auxiliary color for links */
    text-decoration: underline;
}

.page-khuyen-mai__text-link:hover {
    color: #4A8BFF;
}

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

.page-khuyen-mai__promo-card {
    background-color: #ffffff; /* Card BG */
    border-radius: 12px;
    padding: 25px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    align-items: center;
    color: #1F2D3D; /* Text Main */
    height: 100%;
}

.page-khuyen-mai__promo-card-image {
    width: 100%;
    height: 200px; /* Fixed height for consistency */
    overflow: hidden;
    border-radius: 8px;
    margin-bottom: 20px;
}

.page-khuyen-mai__promo-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.page-khuyen-mai__promo-card-title {
    font-size: 1.4em;
    font-weight: 600;
    margin-bottom: 10px;
    color: #1F2D3D; /* Text Main */
}

.page-khuyen-mai__promo-card-description {
    font-size: 0.95em;
    line-height: 1.6;
    margin-bottom: 20px;
    flex-grow: 1;
}

.page-khuyen-mai__guide-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.page-khuyen-mai__guide-item {
    background-color: #ffffff;
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.page-khuyen-mai__guide-number {
    font-size: 2.5em;
    font-weight: 700;
    color: #2F6BFF; /* Main Color */
    margin-bottom: 10px;
}

.page-khuyen-mai__guide-title {
    font-size: 1.2em;
    font-weight: 600;
    margin-bottom: 10px;
    color: #1F2D3D; /* Text Main */
}

.page-khuyen-mai__guide-description {
    font-size: 0.95em;
    line-height: 1.6;
    color: #1F2D3D; /* Text Main */
}

.page-khuyen-mai__cta-wrapper {
    text-align: center;
    margin-top: 40px;
}

.page-khuyen-mai__faq-list {
    margin-top: 30px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.page-khuyen-mai__faq-item {
    background-color: #ffffff;
    border: 1px solid #D6E2FF; /* Border */
    border-radius: 8px;
    margin-bottom: 15px;
    overflow: hidden;
}

.page-khuyen-mai__faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 25px;
    font-size: 1.1em;
    font-weight: 600;
    cursor: pointer;
    color: #1F2D3D; /* Text Main */
    background-color: #ffffff;
    position: relative;
    list-style: none;
}

.page-khuyen-mai__faq-question::-webkit-details-marker {
    display: none;
}

.page-khuyen-mai__faq-question::marker {
    display: none;
}

.page-khuyen-mai__faq-qtext {
    flex-grow: 1;
}

.page-khuyen-mai__faq-toggle {
    font-size: 1.5em;
    color: #2F6BFF;
    margin-left: 15px;
    pointer-events: none; /* Prevent summary click from being consumed by toggle */
}

.page-khuyen-mai__faq-item[open] .page-khuyen-mai__faq-toggle {
    content: '−';
}

.page-khuyen-mai__faq-answer {
    padding: 0 25px 20px;
    font-size: 1em;
    line-height: 1.7;
    color: #1F2D3D; /* Text Main */
}

.page-khuyen-mai__cta-final-content {
    text-align: center;
}

.page-khuyen-mai__cta-final-content .page-khuyen-mai__text-block {
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 30px;
}

.page-khuyen-mai__cta-final-section .page-khuyen-mai__section-title {
    color: #ffffff;
}

/* General image responsiveness */
.page-khuyen-mai img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Mobile responsiveness */
@media (max-width: 768px) {
    .page-khuyen-mai {
        font-size: 15px;
        line-height: 1.5;
    }

    .page-khuyen-mai__hero-section {
        padding-top: 10px !important;
        padding-bottom: 30px;
    }

    .page-khuyen-mai__hero-container {
        flex-direction: column;
        padding: 30px 15px;
        gap: 20px;
    }

    .page-khuyen-mai__hero-content {
        flex: 1 1 100%;
        max-width: 100%;
        padding-right: 0;
        text-align: center;
    }

    .page-khuyen-mai__main-title {
        font-size: 1.8em;
        margin-bottom: 12px;
    }

    .page-khuyen-mai__hero-description {
        font-size: 1em;
        margin-bottom: 20px;
    }

    .page-khuyen-mai__cta-buttons {
        flex-direction: column;
        gap: 10px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
        padding: 0 15px;
    }

    .page-khuyen-mai__btn-primary,
    .page-khuyen-mai__btn-secondary {
        max-width: 100% !important;
        width: 100% !important;
        padding: 12px 15px !important;
        white-space: normal !important;
        word-wrap: break-word !important;
    }

    .page-khuyen-mai__hero-image {
        flex: 1 1 100%;
        max-width: 100%;
        padding: 0 15px;
    }

    .page-khuyen-mai__intro-section,
    .page-khuyen-mai__promo-types-section,
    .page-khuyen-mai__guide-section,
    .page-khuyen-mai__terms-section,
    .page-khuyen-mai__faq-section,
    .page-khuyen-mai__cta-final-section {
        padding: 40px 0;
    }

    .page-khuyen-mai__content-area {
        padding: 0 15px;
        max-width: 100%;
        width: 100%;
        box-sizing: border-box;
    }

    .page-khuyen-mai__section-title {
        font-size: 1.8em;
        margin-bottom: 30px;
    }

    .page-khuyen-mai__promo-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .page-khuyen-mai__promo-card {
        padding: 20px;
    }

    .page-khuyen-mai__promo-card-image {
        height: 180px;
    }

    .page-khuyen-mai__guide-steps {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .page-khuyen-mai__faq-list {
        max-width: 100%;
    }

    .page-khuyen-mai__faq-question {
        padding: 15px 20px;
        font-size: 1em;
    }

    .page-khuyen-mai__faq-answer {
        padding: 0 20px 15px;
    }

    /* Ensure all images in content sections are responsive */
    .page-khuyen-mai img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
    }
}

@media (max-width: 1024px) and (min-width: 769px) {
    .page-khuyen-mai__hero-container,
    .page-khuyen-mai__content-area {
        padding: 0 30px;
    }

    .page-khuyen-mai__hero-content {
        padding-right: 15px;
    }

    .page-khuyen-mai__main-title {
        font-size: 2.5em;
    }

    .page-khuyen-mai__section-title {
        font-size: 2em;
    }

    .page-khuyen-mai__promo-grid,
    .page-khuyen-mai__guide-steps {
        gap: 20px;
    }

    .page-khuyen-mai__promo-card-image {
        height: 180px;
    }
}