.page-khuyen-mai {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: var(--color-main-text); /* #F3F8FF */
}

/* Fixed Header Spacing: Small top margin for first section */
.page-khuyen-mai__hero-section {
    padding-top: 10px; /* Small top margin, not var(--header-offset) */
}

.page-khuyen-mai__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
    box-sizing: border-box;
}

.page-khuyen-mai__section-padding {
    padding: 60px 0;
}

.page-khuyen-mai__dark-bg {
    background: var(--color-deep-navy); /* #08162B */
    color: var(--color-main-text); /* #F3F8FF */
}

.page-khuyen-mai__section-title {
    font-size: 38px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 20px;
    color: var(--color-gold); /* #F2C14E */
}

.page-khuyen-mai__section-subtitle {
    font-size: 18px;
    text-align: center;
    margin-bottom: 40px;
    color: var(--color-secondary-text); /* #AFC4E8 */
}

.page-khuyen-mai__text-block {
    font-size: 16px;
    margin-bottom: 15px;
    color: var(--color-secondary-text); /* #AFC4E8 */
}

/* Hero Section */
.page-khuyen-mai__hero-section {
    position: relative;
    overflow: hidden;
    background: var(--color-deep-navy); /* Fallback for image */
    display: flex;
    flex-direction: column; /* Image on top, content below */
    align-items: center;
    justify-content: center;
    min-height: 600px;
    text-align: center;
}

.page-khuyen-mai__hero-image-wrapper {
    width: 100%;
    position: relative;
    z-index: 1; /* Ensure image is below any potential overlay, though we avoid overlays for text */
    margin-bottom: 20px; /* Space between image and content */
}

.page-khuyen-mai__hero-image {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    max-height: 500px; /* Limit height for hero image */
}

.page-khuyen-mai__hero-content {
    position: relative;
    z-index: 2;
    max-width: 900px;
    padding: 0 15px 40px;
    box-sizing: border-box;
}

.page-khuyen-mai__main-title {
    font-size: clamp(32px, 4vw, 56px); /* Use clamp for H1 */
    font-weight: 800;
    margin-bottom: 15px;
    color: var(--color-gold); /* #F2C14E */
    line-height: 1.2;
    text-shadow: 0 0 10px rgba(242, 193, 78, 0.5);
}

.page-khuyen-mai__hero-description {
    font-size: 20px;
    margin-bottom: 30px;
    color: var(--color-secondary-text); /* #AFC4E8 */
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.page-khuyen-mai__hero-cta {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap; /* Ensure buttons wrap on small screens */
}

/* Buttons */
.page-khuyen-mai__btn-primary,
.page-khuyen-mai__btn-secondary,
.page-khuyen-mai__btn-small {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 30px;
    border-radius: 8px;
    font-size: 18px;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    white-space: normal;
    word-wrap: break-word;
    box-sizing: border-box;
    max-width: 100%;
}

.page-khuyen-mai__btn-primary {
    background: linear-gradient(180deg, #2B73F6 0%, #1144A6 100%);
    color: #ffffff;
    border: none;
    box-shadow: 0 4px 15px rgba(43, 115, 246, 0.4);
}

.page-khuyen-mai__btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(43, 115, 246, 0.6);
}

.page-khuyen-mai__btn-secondary {
    background: #10233F; /* Card B G */
    color: var(--color-gold); /* #F2C14E */
    border: 2px solid var(--color-border); /* #244D84 */
    box-shadow: 0 4px 15px rgba(36, 77, 132, 0.4);
}

.page-khuyen-mai__btn-secondary:hover {
    background: #1B3357; /* Divider */
    color: #ffffff;
    border-color: #4FA8FF; /* Glow */
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(36, 77, 132, 0.6);
}

.page-khuyen-mai__btn-small {
    padding: 10px 20px;
    font-size: 16px;
    border-radius: 6px;
    background: linear-gradient(180deg, #2B73F6 0%, #1144A6 100%);
    color: #ffffff;
    border: none;
    margin-top: 15px;
}

.page-khuyen-mai__btn-small:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(43, 115, 246, 0.4);
}

/* Promo Types Section */
.page-khuyen-mai__promo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.page-khuyen-mai__promo-card.page-khuyen-mai__card {
    background: var(--color-card-bg); /* #10233F */
    border: 1px solid var(--color-border); /* #244D84 */
    border-radius: 12px;
    padding: 25px;
    text-align: center;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.page-khuyen-mai__promo-card.page-khuyen-mai__card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.4);
}

.page-khuyen-mai__promo-card-image {
    width: 100%;
    height: 200px; /* Fixed height for consistency */
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 20px;
    display: block; /* Ensure no extra space below image */
}

.page-khuyen-mai__promo-card-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--color-gold); /* #F2C14E */
}

.page-khuyen-mai__promo-card-description {
    font-size: 16px;
    color: var(--color-secondary-text); /* #AFC4E8 */
    flex-grow: 1; /* Allow description to take available space */
    margin-bottom: 20px;
}

/* Guide Section */
.page-khuyen-mai__guide-list {
    list-style: none;
    padding: 0;
    margin: 0 auto;
    max-width: 900px;
}

.page-khuyen-mai__guide-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 30px;
    background: var(--color-card-bg); /* #10233F */
    border-radius: 12px;
    padding: 25px;
    border: 1px solid var(--color-border); /* #244D84 */
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.page-khuyen-mai__guide-step-number {
    font-size: 32px;
    font-weight: 800;
    color: var(--color-gold); /* #F2C14E */
    margin-right: 20px;
    flex-shrink: 0;
    width: 40px;
    text-align: center;
    line-height: 1;
}

.page-khuyen-mai__guide-content {
    flex-grow: 1;
}

.page-khuyen-mai__guide-title {
    font-size: 22px;
    font-weight: 700;
    margin-top: 0;
    margin-bottom: 10px;
    color: var(--color-gold); /* #F2C14E */
}

.page-khuyen-mai__guide-content p {
    font-size: 16px;
    color: var(--color-secondary-text); /* #AFC4E8 */
    margin-bottom: 0;
}

.page-khuyen-mai__guide-content p a {
    color: var(--color-glow); /* #4FA8FF */
    text-decoration: none;
    font-weight: 600;
}

.page-khuyen-mai__guide-content p a:hover {
    text-decoration: underline;
}

.page-khuyen-mai__guide-cta {
    text-align: center;
    margin-top: 40px;
}

/* Terms Section */
.page-khuyen-mai__terms-list {
    list-style: disc;
    padding-left: 20px;
    margin: 0 auto;
    max-width: 900px;
    color: var(--color-secondary-text); /* #AFC4E8 */
    font-size: 16px;
}

.page-khuyen-mai__terms-list li {
    margin-bottom: 10px;
}

.page-khuyen-mai__terms-section p a {
    color: var(--color-glow); /* #4FA8FF */
    text-decoration: none;
    font-weight: 600;
}

.page-khuyen-mai__terms-section p a:hover {
    text-decoration: underline;
}

/* FAQ Section */
.page-khuyen-mai__faq-list {
    max-width: 900px;
    margin: 0 auto;
}

details.page-khuyen-mai__faq-item {
  margin-bottom: 15px;
  border-radius: 12px;
  border: 1px solid var(--color-border); /* #244D84 */
  overflow: hidden;
  background: var(--color-card-bg); /* #10233F */
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}
details.page-khuyen-mai__faq-item summary.page-khuyen-mai__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 25px;
  cursor: pointer;
  user-select: none;
  list-style: none;
  transition: background-color 0.3s ease;
}
details.page-khuyen-mai__faq-item summary.page-khuyen-mai__faq-question::-webkit-details-marker {
  display: none;
}
details.page-khuyen-mai__faq-item summary.page-khuyen-mai__faq-question:hover {
  background: #1B3357; /* Divider color for hover */
}
.page-khuyen-mai__faq-qtext {
  flex: 1;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
  text-align: left;
  color: var(--color-main-text); /* #F3F8FF */
}
.page-khuyen-mai__faq-toggle {
  font-size: 28px;
  font-weight: bold;
  color: var(--color-gold); /* #F2C14E */
  flex-shrink: 0;
  margin-left: 15px;
  width: 30px;
  text-align: center;
  line-height: 1;
}
details.page-khuyen-mai__faq-item .page-khuyen-mai__faq-answer {
  padding: 0 25px 25px;
  background: #08162B; /* Deep Navy */
  border-radius: 0 0 12px 12px;
}
.page-khuyen-mai__faq-answer p {
    color: var(--color-secondary-text); /* #AFC4E8 */
    margin-bottom: 0;
}
.page-khuyen-mai__faq-answer p a {
    color: var(--color-glow); /* #4FA8FF */
    text-decoration: none;
    font-weight: 600;
}
.page-khuyen-mai__faq-answer p a:hover {
    text-decoration: underline;
}

/* Bottom CTA */
.page-khuyen-mai__cta-bottom {
    text-align: center;
}

.page-khuyen-mai__cta-content {
    background: var(--color-card-bg); /* #10233F */
    border-radius: 12px;
    padding: 40px;
    border: 1px solid var(--color-border); /* #244D84 */
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.page-khuyen-mai__cta-bottom .page-khuyen-mai__section-title {
    margin-bottom: 20px;
    color: var(--color-gold); /* #F2C14E */
}

.page-khuyen-mai__cta-bottom .page-khuyen-mai__text-block {
    margin-bottom: 30px;
    font-size: 18px;
}

.page-khuyen-mai__cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap; /* Ensure buttons wrap on small screens */
}


/* --- Responsive Styles (max-width: 768px) --- */
@media (max-width: 768px) {
    /* 1. Top Section / Hero Section */
    .page-khuyen-mai__hero-section {
        padding-top: 10px; /* Small top margin for mobile */
        min-height: auto;
    }

    .page-khuyen-mai__hero-image-wrapper {
        margin-bottom: 15px;
    }

    .page-khuyen-mai__hero-image {
        max-height: 300px;
    }

    .page-khuyen-mai__hero-content {
        padding: 0 10px 30px;
    }

    .page-khuyen-mai__main-title {
        font-size: 28px;
        margin-bottom: 10px;
    }

    .page-khuyen-mai__hero-description {
        font-size: 16px;
        margin-bottom: 20px;
    }

    .page-khuyen-mai__hero-cta {
        flex-direction: column; /* Stack buttons vertically on mobile */
        gap: 10px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
        padding: 0 15px;
    }

    /* General section padding */
    .page-khuyen-mai__section-padding {
        padding: 40px 0;
    }

    .page-khuyen-mai__section-title {
        font-size: 28px;
        margin-bottom: 15px;
    }

    .page-khuyen-mai__section-subtitle {
        font-size: 16px;
        margin-bottom: 25px;
    }

    .page-khuyen-mai__text-block {
        font-size: 15px;
    }

    /* 2. Landing Page Two-Column Modules (N/A for this page, but general rule for grid layouts) */
    .page-khuyen-mai__promo-grid {
        grid-template-columns: 1fr; /* Single column for promo cards */
        gap: 20px;
    }

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

    .page-khuyen-mai__promo-card-image {
        height: 180px;
        margin-bottom: 15px;
    }

    .page-khuyen-mai__promo-card-title {
        font-size: 20px;
        margin-bottom: 10px;
    }

    .page-khuyen-mai__promo-card-description {
        font-size: 15px;
        margin-bottom: 15px;
    }

    .page-khuyen-mai__guide-item {
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding: 20px;
    }

    .page-khuyen-mai__guide-step-number {
        margin-right: 0;
        margin-bottom: 10px;
    }

    .page-khuyen-mai__guide-title {
        font-size: 20px;
    }

    .page-khuyen-mai__guide-content p {
        font-size: 15px;
    }

    .page-khuyen-mai__terms-list {
        padding-left: 15px;
        font-size: 15px;
    }

    /* 3. Generic Images and Containers */
    .page-khuyen-mai img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
    }
    
    .page-khuyen-mai__section-padding,
    .page-khuyen-mai__container,
    .page-khuyen-mai__promo-card,
    .page-khuyen-mai__guide-item,
    .page-khuyen-mai__cta-content {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px;
        padding-right: 15px;
    }

    /* FAQ Mobile Styles */
    details.page-khuyen-mai__faq-item summary.page-khuyen-mai__faq-question {
        padding: 15px;
    }
    .page-khuyen-mai__faq-qtext {
        font-size: 16px;
    }
    .page-khuyen-mai__faq-toggle {
        font-size: 24px;
        width: 24px;
    }
    details.page-khuyen-mai__faq-item .page-khuyen-mai__faq-answer {
        padding: 0 15px 15px;
    }

    /* 4. Buttons */
    .page-khuyen-mai__btn-primary,
    .page-khuyen-mai__btn-secondary,
    .page-khuyen-mai__btn-small,
    .page-khuyen-mai a[class*="button"],
    .page-khuyen-mai a[class*="btn"] {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        white-space: normal !important;
        word-wrap: break-word !important;
        padding-left: 15px;
        padding-right: 15px;
    }
    
    /* Button containers mobile adaptation */
    .page-khuyen-mai__hero-cta,
    .page-khuyen-mai__guide-cta,
    .page-khuyen-mai__cta-buttons {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px;
        padding-right: 15px;
        flex-direction: column !important; /* Stack buttons vertically */
        gap: 10px;
    }

    .page-khuyen-mai__cta-content {
        padding: 30px 15px;
    }
}