:root {
    --primary-color: #F2C14E;
    --secondary-color: #FFD36B;
    --card-bg: #111111;
    --background-color: #0A0A0A;
    --text-main-color: #FFF6D6;
    --border-color: #3A2A12;
    --glow-color: #FFD36B;
    --button-gradient: linear-gradient(180deg, #FFD86A 0%, #DDA11D 100%);
}

.page-khuyen-mai {
    font-family: 'Arial', sans-serif;
    color: var(--text-main-color); /* Default text color for the page */
    background-color: var(--background-color);
    line-height: 1.6;
}

.page-khuyen-mai__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 15px;
}

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

.page-khuyen-mai__section-title {
    font-size: 38px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 40px;
    color: var(--primary-color);
    text-shadow: 0 0 10px rgba(255, 211, 107, 0.4);
}

.page-khuyen-mai__section-title--light {
    color: var(--text-main-color);
}

.page-khuyen-mai__text-block {
    font-size: 17px;
    line-height: 1.8;
    text-align: center;
    max-width: 900px;
    margin: 0 auto 30px auto;
    color: var(--text-main-color);
}

.page-khuyen-mai__text-block--light {
    color: var(--text-main-color);
}

/* HERO Section */
.page-khuyen-mai__hero-section {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding-top: 10px; /* Small top padding, body handles header offset */
    overflow: hidden;
    text-align: center;
}

.page-khuyen-mai__hero-image-wrap {
    width: 100%;
    max-height: 600px; /* Constrain hero image height */
    overflow: hidden;
}

.page-khuyen-mai__hero-image {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    object-position: center;
}

.page-khuyen-mai__hero-content {
    position: relative;
    z-index: 2;
    padding: 40px 15px;
    max-width: 900px;
    margin-top: -100px; /* Overlap slightly for visual effect, but text is below image */
    background: rgba(17, 17, 17, 0.85); /* Card BG with transparency */
    border-radius: 15px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
    border: 1px solid var(--border-color);
}

.page-khuyen-mai__main-title {
    font-size: 52px;
    font-weight: 800;
    color: var(--secondary-color);
    margin-bottom: 20px;
    line-height: 1.2;
    text-shadow: 0 0 15px rgba(255, 211, 107, 0.7);
}

.page-khuyen-mai__description {
    font-size: 19px;
    color: var(--text-main-color);
    margin-bottom: 30px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.page-khuyen-mai__cta-button {
    display: inline-block;
    padding: 15px 35px;
    background: var(--button-gradient);
    color: #ffffff;
    font-size: 20px;
    font-weight: 700;
    text-decoration: none;
    border-radius: 50px;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    border: none;
    cursor: pointer;
    max-width: 100%;
    box-sizing: border-box;
    white-space: normal;
    word-wrap: break-word;
}

.page-khuyen-mai__cta-button:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    opacity: 0.9;
}

/* Why Promo Section */
.page-khuyen-mai__why-promo-section {
    background-color: var(--card-bg);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.page-khuyen-mai__feature-list {
    list-style: none;
    padding: 0;
    margin: 40px auto 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    max-width: 1000px;
}

.page-khuyen-mai__feature-item {
    background: rgba(255, 255, 255, 0.05);
    padding: 20px;
    border-radius: 10px;
    font-size: 16px;
    text-align: center;
    color: var(--text-main-color);
    border: 1px solid rgba(58, 42, 18, 0.5);
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
    transition: transform 0.2s ease;
}

.page-khuyen-mai__feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
}

/* Types of Promotions Section */
.page-khuyen-mai__types-section {
    background-color: var(--background-color);
}

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

.page-khuyen-mai__promo-card {
    background: var(--card-bg);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-khuyen-mai__promo-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
}

.page-khuyen-mai__promo-card-image {
    width: 100%;
    height: 220px;
    object-fit: cover;
    display: block;
}

.page-khuyen-mai__promo-card-content {
    padding: 25px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.page-khuyen-mai__promo-card-title {
    font-size: 24px;
    color: var(--primary-color);
    margin-bottom: 15px;
    font-weight: 700;
    line-height: 1.3;
}

.page-khuyen-mai__promo-card-text {
    font-size: 15px;
    color: var(--text-main-color);
    margin-bottom: 20px;
    flex-grow: 1;
}

.page-khuyen-mai__promo-card-button {
    display: inline-block;
    padding: 12px 25px;
    background: var(--button-gradient);
    color: #ffffff;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    border-radius: 30px;
    transition: all 0.3s ease;
    align-self: flex-start;
    max-width: 100%;
    box-sizing: border-box;
    white-space: normal;
    word-wrap: break-word;
}

.page-khuyen-mai__promo-card-button:hover {
    opacity: 0.9;
    transform: scale(1.05);
}

/* How to Claim Section */
.page-khuyen-mai__how-to-claim-section {
    background-color: var(--card-bg);
    border-top: 1px solid var(--border-color);
}

.page-khuyen-mai__steps-list {
    list-style: none;
    padding: 0;
    margin: 40px auto 0 auto;
    max-width: 900px;
}

.page-khuyen-mai__step-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 30px;
    background: rgba(255, 255, 255, 0.05);
    padding: 25px;
    border-radius: 10px;
    border: 1px solid rgba(58, 42, 18, 0.5);
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.page-khuyen-mai__step-number {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 45px;
    height: 45px;
    min-width: 45px;
    background: var(--primary-color);
    color: #000000;
    font-size: 24px;
    font-weight: 700;
    border-radius: 50%;
    margin-right: 20px;
    box-shadow: 0 0 10px var(--glow-color);
}

.page-khuyen-mai__step-text {
    font-size: 16px;
    color: var(--text-main-color);
    margin: 0;
    text-align: left;
}

.page-khuyen-mai__step-text strong {
    color: var(--secondary-color);
}

/* Terms Section */
.page-khuyen-mai__terms-section {
    background-color: var(--background-color);
    border-top: 1px solid var(--border-color);
}

.page-khuyen-mai__read-more-link {
    display: inline-block;
    color: var(--secondary-color);
    text-decoration: underline;
    font-size: 17px;
    margin-top: 20px;
    transition: color 0.3s ease;
}

.page-khuyen-mai__read-more-link:hover {
    color: var(--primary-color);
}

/* FAQ Section */
details.page-khuyen-mai__faq-item {
  margin-bottom: 15px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  overflow: hidden;
  background: var(--card-bg);
  color: var(--text-main-color);
}
details.page-khuyen-mai__faq-item summary.page-khuyen-mai__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 20px;
  cursor: pointer;
  user-select: none;
  list-style: none;
  transition: background-color 0.3s ease;
  color: var(--primary-color);
  font-weight: 600;
}
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: rgba(255, 255, 255, 0.05);
}
.page-khuyen-mai__faq-qtext {
  flex: 1;
  font-size: 18px;
  line-height: 1.5;
  text-align: left;
  color: var(--primary-color);
}
.page-khuyen-mai__faq-toggle {
  font-size: 28px;
  font-weight: bold;
  color: var(--secondary-color);
  flex-shrink: 0;
  margin-left: 15px;
  width: 28px;
  text-align: center;
}
details.page-khuyen-mai__faq-item .page-khuyen-mai__faq-answer {
  padding: 0 20px 20px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: 0 0 10px 10px;
  color: var(--text-main-color);
  font-size: 16px;
}
.page-khuyen-mai__faq-answer p {
    margin: 0;
}

/* Bottom CTA Section */
.page-khuyen-mai__cta-bottom-section {
    background: linear-gradient(135deg, #0A0A0A, #1a1a1a);
    padding: 80px 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.page-khuyen-mai__button-group {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 40px;
}

.page-khuyen-mai__btn-primary {
    background: var(--button-gradient);
    color: #ffffff;
    border: 2px solid transparent;
}

.page-khuyen-mai__btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.page-khuyen-mai__btn-secondary:hover {
    background: var(--primary-color);
    color: #000000;
}

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

/* Mobile Responsive Styles */
@media (max-width: 1024px) {
    .page-khuyen-mai__hero-content {
        margin-top: -80px;
        padding: 30px;
    }
    .page-khuyen-mai__main-title {
        font-size: 44px;
    }
    .page-khuyen-mai__section-title {
        font-size: 32px;
    }
    .page-khuyen-mai__promo-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
    .page-khuyen-mai__feature-list {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

@media (max-width: 768px) {
    /* HERO 主图区域 */
    .page-khuyen-mai__hero-section {
        padding-top: 10px;
    }
    .page-khuyen-mai__hero-image-wrap {
        max-height: 400px;
    }
    .page-khuyen-mai__hero-image {
        object-fit: contain !important; /* 禁止 cover 裁切两侧 */
        aspect-ratio: unset !important;
        height: auto !important;
    }
    .page-khuyen-mai__hero-content {
        margin-top: -60px;
        padding: 25px 15px;
        border-radius: 10px;
    }
    .page-khuyen-mai__main-title {
        font-size: clamp(32px, 8vw, 40px);
        margin-bottom: 15px;
    }
    .page-khuyen-mai__description {
        font-size: 16px;
        margin-bottom: 25px;
    }
    .page-khuyen-mai__cta-button {
        padding: 12px 25px;
        font-size: 18px;
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        white-space: normal !important;
        word-wrap: break-word !important;
    }

    /* 通用图片与容器 */
    .page-khuyen-mai img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
    }
    .page-khuyen-mai__container,
    .page-khuyen-mai__section,
    .page-khuyen-mai__promo-card,
    .page-khuyen-mai__feature-item,
    .page-khuyen-mai__step-item {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px;
        padding-right: 15px;
    }
    .page-khuyen-mai__section {
        padding: 40px 0;
    }
    .page-khuyen-mai__section-title {
        font-size: 28px;
        margin-bottom: 30px;
    }
    .page-khuyen-mai__text-block {
        font-size: 15px;
        margin-bottom: 20px;
    }

    /* 产品展示图区域 (Promo Grid) */
    .page-khuyen-mai__promo-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        overflow-x: hidden; /* Prevent horizontal scroll */
    }
    .page-khuyen-mai__promo-card-image {
        height: 180px;
    }
    .page-khuyen-mai__promo-card-title {
        font-size: 20px;
    }
    .page-khuyen-mai__promo-card-text {
        font-size: 14px;
    }
    .page-khuyen-mai__promo-card-button {
        font-size: 15px;
        padding: 10px 20px;
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        white-space: normal !important;
        word-wrap: break-word !important;
    }

    /* 装饰主标题 + 长文 SEO 区 */
    .page-khuyen-mai__why-promo-section .page-khuyen-mai__text-block,
    .page-khuyen-mai__terms-section .page-khuyen-mai__text-block {
        text-align: left;
    }
    .page-khuyen-mai__feature-list {
        grid-template-columns: 1fr;
        gap: 15px;
        margin-top: 20px;
    }

    /* Hướng Dẫn */
    .page-khuyen-mai__step-item {
        flex-direction: column;
        align-items: center;
        padding: 20px;
        text-align: center;
    }
    .page-khuyen-mai__step-number {
        margin: 0 0 15px 0;
    }
    .page-khuyen-mai__step-text {
        font-size: 15px;
        text-align: center;
    }

    /* FAQ */
    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; }
    details.page-khuyen-mai__faq-item .page-khuyen-mai__faq-answer { padding: 0 15px 15px; }

    /* 按钮与按钮容器 */
    .page-khuyen-mai__button-group {
        flex-direction: column;
        gap: 15px;
        margin-top: 30px;
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px;
        padding-right: 15px;
    }
    .page-khuyen-mai__cta-bottom-section {
        padding: 60px 0;
    }
    .page-khuyen-mai__btn-primary,
    .page-khuyen-mai__btn-secondary {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        white-space: normal !important;
        word-wrap: break-word !important;
    }
}