:root {
    --primary-color: #113B7A;
    --secondary-color: #1D5FD1;
    --button-gradient: linear-gradient(180deg, #2B73F6 0%, #1144A6 100%);
    --card-bg: #10233F;
    --text-main: #F3F8FF;
    --text-secondary: #AFC4E8;
    --border-color: #244D84;
    --glow-color: #4FA8FF;
    --gold-color: #F2C14E;
    --divider-color: #1B3357;
    --deep-navy: #08162B;
}

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

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

/* Hero Section */
.page-khuyen-mai__hero-section {
    padding-top: 10px; /* As per fixed header spacing rule */
    background-color: var(--deep-navy);
    color: var(--text-main);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding-bottom: 40px;
}

.page-khuyen-mai__hero-image-wrapper {
    width: 100%;
    max-width: 1920px;
    margin-bottom: 20px;
}

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

.page-khuyen-mai__hero-content {
    max-width: 900px;
    padding: 0 20px;
}

.page-khuyen-mai__main-title {
    font-size: clamp(2.2rem, 4vw, 3.5rem);
    color: var(--gold-color);
    margin-bottom: 15px;
    font-weight: bold;
    line-height: 1.2;
}

.page-khuyen-mai__hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.page-khuyen-mai__cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.page-khuyen-mai__btn-primary,
.page-khuyen-mai__btn-secondary,
.page-khuyen-mai__btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 25px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
    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: var(--button-gradient);
    color: var(--text-main);
    border: none;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.page-khuyen-mai__btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-2px);
}

.page-khuyen-mai__btn-secondary {
    background: var(--card-bg);
    color: var(--gold-color);
    border: 2px solid var(--gold-color);
}

.page-khuyen-mai__btn-secondary:hover {
    background: var(--gold-color);
    color: var(--deep-navy);
    transform: translateY(-2px);
}

/* General Section Styling */
.page-khuyen-mai__intro-section,
.page-khuyen-mai__terms-section,
.page-khuyen-mai__faq-section {
    padding: 60px 0;
    background-color: var(--card-bg);
    color: var(--text-main);
}

.page-khuyen-mai__promo-types-section,
.page-khuyen-mai__claim-section,
.page-khuyen-mai__conclusion-section {
    padding: 60px 0;
    background-color: var(--deep-navy);
    color: var(--text-main);
}

.page-khuyen-mai__section-title {
    font-size: clamp(1.8rem, 3.5vw, 2.8rem);
    color: var(--gold-color);
    text-align: center;
    margin-bottom: 40px;
    font-weight: bold;
}

.page-khuyen-mai__text-block {
    font-size: 1.05rem;
    margin-bottom: 20px;
    color: var(--text-secondary);
    text-align: justify;
}

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

.page-khuyen-mai__promo-card,
.page-khuyen-mai__step-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 25px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
    height: 100%;
    box-sizing: border-box;
}

.page-khuyen-mai__card-image {
    width: 100%;
    max-width: 400px;
    height: 250px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
}

.page-khuyen-mai__card-title {
    font-size: 1.5rem;
    color: var(--gold-color);
    margin-bottom: 15px;
    font-weight: bold;
}

.page-khuyen-mai__card-description {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 15px;
    flex-grow: 1;
}

.page-khuyen-mai__card-list {
    list-style: none;
    padding: 0;
    margin: 0 0 20px 0;
    text-align: left;
    width: 100%;
    color: var(--text-secondary);
}

.page-khuyen-mai__card-list li {
    margin-bottom: 8px;
    padding-left: 25px;
    position: relative;
}

.page-khuyen-mai__card-list li::before {
    content: '✅';
    position: absolute;
    left: 0;
    color: var(--gold-color);
}

.page-khuyen-mai__btn-outline {
    background: transparent;
    color: var(--gold-color);
    border: 1px solid var(--gold-color);
    margin-top: auto;
}

.page-khuyen-mai__btn-outline:hover {
    background: var(--gold-color);
    color: var(--deep-navy);
}

/* Terms and Conditions Section */
.page-khuyen-mai__terms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.page-khuyen-mai__term-item {
    background-color: var(--deep-navy);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 25px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
}

.page-khuyen-mai__term-title {
    font-size: 1.3rem;
    color: var(--gold-color);
    margin-bottom: 10px;
}

.page-khuyen-mai__term-description {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.page-khuyen-mai__btn-full-width {
    width: 100%;
    margin-top: 40px;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
    display: block;
}

/* Claim Steps Section */
.page-khuyen-mai__steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.page-khuyen-mai__step-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 25px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
    height: 100%;
    box-sizing: border-box;
}

.page-khuyen-mai__step-title {
    font-size: 1.4rem;
    color: var(--gold-color);
    margin-bottom: 15px;
}

.page-khuyen-mai__step-description {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    flex-grow: 1;
}

/* FAQ Section */
.page-khuyen-mai__faq-list {
    margin-top: 30px;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.page-khuyen-mai__faq-item {
    background-color: var(--deep-navy);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    margin-bottom: 15px;
    overflow: hidden;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
}

.page-khuyen-mai__faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 25px;
    cursor: pointer;
    font-size: 1.15rem;
    color: var(--gold-color);
    font-weight: bold;
    user-select: none;
    list-style: none;
}

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

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

.page-khuyen-mai__faq-toggle {
    font-size: 1.5rem;
    margin-left: 15px;
    transition: transform 0.3s ease;
}

.page-khuyen-mai__faq-item[open] .page-khuyen-mai__faq-toggle {
    transform: rotate(45deg);
}

.page-khuyen-mai__faq-answer {
    padding: 0 25px 20px 25px;
    font-size: 1rem;
    color: var(--text-secondary);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
}

.page-khuyen-mai__faq-item[open] .page-khuyen-mai__faq-answer {
    max-height: 500px; /* Arbitrary large value to allow content to show */
    transition: max-height 0.5s ease-in;
}

/* Conclusion Section */
.page-khuyen-mai__cta-buttons--center {
    margin-top: 30px;
}

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

/* Responsive Styles */
@media (max-width: 768px) {
    .page-khuyen-mai {
        font-size: 16px;
        line-height: 1.6;
    }

    .page-khuyen-mai__container {
        padding-left: 15px;
        padding-right: 15px;
    }

    /* HERO 主图区域 */
    .page-khuyen-mai__hero-section {
        padding-top: 10px;
        padding-bottom: 30px;
    }

    .page-khuyen-mai__main-title {
        font-size: 2.2rem;
        margin-bottom: 10px;
    }

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

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

    .page-khuyen-mai__btn-primary,
    .page-khuyen-mai__btn-secondary,
    .page-khuyen-mai__btn-outline {
        width: 100% !important;
        max-width: 100% !important;
        padding-left: 15px;
        padding-right: 15px;
    }

    /* 博客卡片区 (Promo cards here act as blog-like cards) */
    .page-khuyen-mai__grid,
    .page-khuyen-mai__terms-grid,
    .page-khuyen-mai__steps-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }

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

    .page-khuyen-mai__card-image {
        height: 200px;
    }

    /* 通用图片与容器 */
    .page-khuyen-mai img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
    }

    .page-khuyen-mai__section,
    .page-khuyen-mai__card,
    .page-khuyen-mai__container,
    .page-khuyen-mai__promo-card,
    .page-khuyen-mai__term-item,
    .page-khuyen-mai__step-card,
    .page-khuyen-mai__faq-item {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px;
        padding-right: 15px;
    }

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

    .page-khuyen-mai__text-block {
        font-size: 1rem;
    }

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

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

    .page-khuyen-mai__btn-full-width {
        max-width: 100% !important;
    }

    /* No explicit game carousel, six-grid partner section, or blog-specific sliders on this page. */
    /* Skipping .page-khuyen-mai__slider-track, .page-khuyen-mai__banners-top-wrapper, .page-khuyen-mai__blog-masonry, .page-khuyen-mai__blog-slider-track. */
}