.page-khuyen-mai {
    background: #F5F7FA;
    color: #333333;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    max-width: 100%;
    overflow-x: hidden;
}

/* HERO Section */
.page-khuyen-mai__hero-section {
    padding: 10px 16px 24px;
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.page-khuyen-mai__hero-image-wrap {
    width: 100%;
    max-width: 1020px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}

.page-khuyen-mai__hero-image {
    width: 100%;
    max-width: 100%;
    height: auto;
    aspect-ratio: 17/5;
    object-fit: cover;
    display: block;
}

.page-khuyen-mai__hero-content {
    text-align: center;
    max-width: 720px;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.page-khuyen-mai__main-title {
    color: #E53935;
    font-weight: 800;
    line-height: 1.25;
    letter-spacing: -0.02em;
    max-width: 600px;
    margin: 0 0 8px;
    font-size: clamp(1.4rem, 3vw, 2rem);
}

.page-khuyen-mai__hero-description {
    font-size: 1rem;
    color: #333333;
    margin-bottom: 16px;
    max-width: 560px;
}

.page-khuyen-mai__hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
}

.page-khuyen-mai__btn {
    display: inline-block;
    padding: 12px 28px;
    border: none;
    border-radius: 999px;
    font-size: 1rem;
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    text-align: center;
    background: linear-gradient(180deg, #FF5A4F 0%, #E53935 100%);
    color: #ffffff;
    box-shadow: 0 4px 14px rgba(229, 57, 53, 0.3);
}

.page-khuyen-mai__btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(229, 57, 53, 0.4);
}

.page-khuyen-mai__btn--secondary {
    background: #ffffff;
    color: #E53935;
    border: 2px solid #E53935;
    box-shadow: none;
}

.page-khuyen-mai__btn--ghost {
    background: transparent;
    color: #E53935;
    border: 2px solid #E53935;
    box-shadow: none;
}

/* Promo Grid */
.page-khuyen-mai__promo-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    padding: 24px 16px 32px;
    max-width: 1200px;
    margin: 0 auto;
}

.page-khuyen-mai__promo-card {
    background: #FFFFFF;
    border: 1px solid #E0E0E0;
    border-radius: 12px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: box-shadow 0.3s ease;
}

.page-khuyen-mai__promo-card:hover {
    box-shadow: 0 12px 28px rgba(0,0,0,0.1);
}

.page-khuyen-mai__promo-image {
    width: 100%;
    height: auto;
    aspect-ratio: 4/2;
    object-fit: cover;
    display: block;
}

.page-khuyen-mai__promo-body {
    padding: 16px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.page-khuyen-mai__promo-title {
    color: #E53935;
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.page-khuyen-mai__promo-desc {
    font-size: 0.9rem;
    color: #333333;
    flex: 1;
    margin-bottom: 16px;
}

.page-khuyen-mai__promo-cta {
    display: inline-block;
    background: linear-gradient(180deg, #FF5A4F 0%, #E53935 100%);
    color: #ffffff;
    text-decoration: none;
    padding: 10px 20px;
    border-radius: 999px;
    font-weight: 700;
    font-size: 0.9rem;
    text-align: center;
    transition: opacity 0.2s ease;
}

.page-khuyen-mai__promo-cta:hover {
    opacity: 0.9;
}

/* Rules Section */
.page-khuyen-mai__rules-section {
    background: #FFFFFF;
    border-top: 1px solid #E0E0E0;
    border-bottom: 1px solid #E0E0E0;
    padding: 32px 16px;
}

.page-khuyen-mai__rules-inner {
    max-width: 900px;
    margin: 0 auto;
}

.page-khuyen-mai__section-title,
.page-khuyen-mai__guide-title {
    color: #E53935;
    font-size: 1.8rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 24px;
}

.page-khuyen-mai__rules-content p {
    margin-bottom: 12px;
    font-size: 0.95rem;
}

.page-khuyen-mai__rules-list {
    margin: 16px 0 24px;
    padding-left: 20px;
    list-style: disc;
}

.page-khuyen-mai__rules-list li {
    margin-bottom: 10px;
    font-size: 0.95rem;
}

.page-khuyen-mai__rules-cta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
    margin-top: 24px;
}

/* Guide Section */
.page-khuyen-mai__guide-inner {
    max-width: 1000px;
    margin: 0 auto;
    padding: 32px 16px 48px;
}

.page-khuyen-mai__guide-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 24px;
}

.page-khuyen-mai__guide-step {
    background: #FFFFFF;
    border: 1px solid #E0E0E0;
    border-radius: 12px;
    padding: 16px;
    text-align: center;
}

.page-khuyen-mai__guide-image {
    width: 100%;
    max-width: 800px;
    aspect-ratio: 2/1;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 12px;
    display: block;
}

.page-khuyen-mai__guide-step h3 {
    color: #E53935;
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.page-khuyen-mai__guide-step p {
    font-size: 0.9rem;
    margin-bottom: 12px;
}

.page-khuyen-mai__guide-link {
    display: inline-block;
    background: linear-gradient(180deg, #FF5A4F 0%, #E53935 100%);
    color: #ffffff;
    text-decoration: none;
    padding: 8px 18px;
    border-radius: 999px;
    font-weight: 600;
    font-size: 0.85rem;
}

/* FAQ */
.page-khuyen-mai__faq {
    background: #FFFFFF;
    border: 1px solid #E0E0E0;
    border-radius: 8px;
    margin-bottom: 12px;
    overflow: hidden;
}

.page-khuyen-mai__faq-question {
    padding: 16px 20px;
    cursor: pointer;
    font-weight: 600;
    color: #333333;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
}

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

.page-khuyen-mai__faq-toggle {
    color: #E53935;
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1;
}

.page-khuyen-mai__faq-answer {
    padding: 0 20px 16px;
    font-size: 0.9rem;
    border-top: 1px solid #f0f0f0;
    padding-top: 12px;
}

/* Responsive */
@media (max-width: 1024px) {
    .page-khuyen-mai__promo-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .page-khuyen-mai__guide-steps {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .page-khuyen-mai__hero-section {
        padding-top: 8px;
    }

    .page-khuyen-mai__hero-image {
        aspect-ratio: 2/1;
    }

    .page-khuyen-mai__hero-cta {
        flex-direction: column;
        align-items: stretch;
    }

    .page-khuyen-mai__btn,
    .page-khuyen-mai__btn--primary,
    .page-khuyen-mai__btn--secondary,
    .page-khuyen-mai__btn--ghost {
        max-width: 100%;
        box-sizing: border-box;
        white-space: normal;
        word-wrap: break-word;
        width: 100%;
        text-align: center;
    }

    .page-khuyen-mai__promo-grid {
        grid-template-columns: 1fr;
        gap: 16px;
        padding: 16px;
    }

    .page-khuyen-mai__promo-image {
        max-width: 100%;
        height: auto;
    }

    .page-khuyen-mai__rules-section {
        padding: 24px 16px;
    }

    .page-khuyen-mai__section-title,
    .page-khuyen-mai__guide-title {
        font-size: 1.4rem;
    }

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

    .page-khuyen-mai__guide-image {
        max-width: 100%;
        height: auto;
    }

    .page-khuyen-mai img {
        max-width: 100% !important;
        height: auto !important;
    }

    .page-khuyen-mai__faq-question {
        flex-direction: row;
        align-items: center;
    }

    .page-khuyen-mai__rules-cta {
        flex-direction: column;
        align-items: stretch;
    }
}

@media (max-width: 480px) {
    .page-khuyen-mai__promo-title {
        font-size: 1.1rem;
    }

    .page-khuyen-mai__promo-desc {
        font-size: 0.85rem;
    }

    .page-khuyen-mai__main-title {
        font-size: 1.3rem;
    }
}