.page-khuyn-mi {
    font-family: 'Arial', sans-serif;
    color: #E0E0E0; /* Màu chữ nhạt cho nền tối */
    background-color: #1a1a1a; /* Nền tối */
    line-height: 1.6;
}

.page-khuyn-mi__hero {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    background: linear-gradient(135deg, #2a2a2a 0%, #1a1a1a 100%);
    text-align: center;
    position: relative;
    overflow: hidden;
    border-bottom: 2px solid #FFD700;
}

.page-khuyn-mi__hero-content {
    max-width: 900px;
    z-index: 1;
    color: #FFFFFF;
}

.page-khuyn-mi__hero-title {
    font-size: 3.2em;
    color: #FFD700; /* Vàng sáng */
    margin-bottom: 20px;
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
    font-weight: bold;
}

.page-khuyn-mi__hero-description {
    font-size: 1.2em;
    color: #E0E0E0;
    margin-bottom: 30px;
}

.page-khuyn-mi__hero-image-wrapper {
    margin-top: 40px;
    max-width: 100%;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.page-khuyn-mi__hero-image {
    width: 100%;
    height: auto;
    display: block;
}

.page-khuyn-mi__section {
    padding: 60px 20px;
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
    border-bottom: 1px solid rgba(255, 215, 0, 0.2);
}

.page-khuyn-mi__section:last-of-type {
    border-bottom: none;
}

.page-khuyn-mi__section-title {
    font-size: 2.5em;
    color: #1E90FF; /* Xanh đậm */
    margin-bottom: 20px;
    text-shadow: 0 0 8px rgba(30, 144, 255, 0.4);
}

.page-khuyn-mi__section-description {
    font-size: 1.1em;
    color: #C0C0C0;
    margin-bottom: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

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

.page-khuyn-mi__promo-card,
.page-khuyn-mi__detail-item {
    background-color: #2a2a2a;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.4);
    text-align: left;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    border: 1px solid #3a3a3a;
}

.page-khuyn-mi__promo-card:hover,
.page-khuyn-mi__detail-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.6);
}

.page-khuyn-mi__promo-image,
.page-khuyn-mi__detail-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 20px;
}

.page-khuyn-mi__promo-title,
.page-khuyn-mi__detail-title {
    font-size: 1.6em;
    color: #FFD700; /* Vàng sáng */
    margin-bottom: 15px;
    line-height: 1.3;
}

.page-khuyn-mi__promo-title a,
.page-khuyn-mi__detail-title a {
    color: #FFD700;
    text-decoration: none;
    transition: color 0.3s ease;
}

.page-khuyn-mi__promo-title a:hover,
.page-khuyn-mi__detail-title a:hover {
    color: #1E90FF;
}

.page-khuyn-mi__promo-text,
.page-khuyn-mi__detail-text {
    color: #B0B0B0;
    font-size: 1em;
    flex-grow: 1;
    margin-bottom: 20px;
}

.page-khuyn-mi__btn {
    display: inline-block;
    padding: 12px 25px;
    border-radius: 8px;
    font-size: 1.1em;
    font-weight: bold;
    text-decoration: none;
    transition: background-color 0.3s ease, transform 0.2s ease;
    cursor: pointer;
    white-space: nowrap;
    text-align: center;
}

.page-khuyn-mi__btn--primary {
    background-color: #FFD700; /* Vàng sáng */
    color: #1a1a1a;
    border: none;
}

.page-khuyn-mi__btn--primary:hover {
    background-color: #e6c200;
    transform: translateY(-3px);
}

.page-khuyn-mi__btn--secondary {
    background-color: #1E90FF; /* Xanh đậm */
    color: #FFFFFF;
    border: none;
}

.page-khuyn-mi__btn--secondary:hover {
    background-color: #1a7ae0;
    transform: translateY(-3px);
}

.page-khuyn-mi__btn--center {
    margin-top: 40px;
}

.page-khuyn-mi__btn--large {
    padding: 15px 35px;
    font-size: 1.3em;
}

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

.page-khuyn-mi__step {
    background-color: #2a2a2a;
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    text-align: left;
    border: 1px solid #3a3a3a;
}

.page-khuyn-mi__step-title {
    font-size: 1.4em;
    color: #FFD700;
    margin-bottom: 10px;
}

.page-khuyn-mi__step-text {
    color: #B0B0B0;
    font-size: 0.95em;
}

.page-khuyn-mi__faq-list {
    margin-top: 30px;
    text-align: left;
}

.page-khuyn-mi__faq-item {
    background-color: #2a2a2a;
    border-radius: 10px;
    margin-bottom: 15px;
    padding: 20px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    border: 1px solid #3a3a3a;
}

.page-khuyn-mi__faq-question {
    font-size: 1.3em;
    color: #1E90FF;
    margin-bottom: 10px;
    cursor: pointer;
    position: relative;
    padding-right: 30px;
}

.page-khuyn-mi__faq-question::after {
    content: '+';
    position: absolute;
    right: 0;
    top: 0;
    font-size: 1.2em;
    color: #FFD700;
    transition: transform 0.3s ease;
}

.page-khuyn-mi__faq-question.active::after {
    content: '-';
    transform: rotate(180deg);
}

.page-khuyn-mi__faq-answer {
    color: #B0B0B0;
    font-size: 1em;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease-out, padding 0.5s ease-out;
    padding-top: 0;
}

.page-khuyn-mi__faq-answer.active {
    max-height: 200px; /* Adjust based on content */
    padding-top: 15px;
}

.page-khuyn-mi__link {
    color: #FFD700;
    text-decoration: none;
    transition: color 0.3s ease;
}

.page-khuyn-mi__link:hover {
    color: #1E90FF;
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
    .page-khuyn-mi__hero {
        padding: 40px 15px;
    }

    .page-khuyn-mi__hero-title {
        font-size: 2.2em;
    }

    .page-khuyn-mi__hero-description {
        font-size: 1em;
    }

    .page-khuyn-mi__section {
        padding: 40px 15px;
    }

    .page-khuyn-mi__section-title {
        font-size: 2em;
    }

    .page-khuyn-mi__promo-grid,
    .page-khuyn-mi__details-grid,
    .page-khuyn-mi__steps {
        grid-template-columns: 1fr;
    }

    .page-khuyn-mi__promo-card,
    .page-khuyn-mi__detail-item,
    .page-khuyn-mi__step {
        padding: 20px;
    }

    .page-khuyn-mi__promo-title,
    .page-khuyn-mi__detail-title {
        font-size: 1.3em;
    }

    .page-khuyn-mi__btn--large {
        padding: 12px 25px;
        font-size: 1.1em;
    }
}

@media (max-width: 480px) {
    .page-khuyn-mi__hero-title {
        font-size: 1.8em;
    }

    .page-khuyn-mi__section-title {
        font-size: 1.6em;
    }

    .page-khuyn-mi__btn {
        width: 100%;
        box-sizing: border-box;
    }
    .page-khuyn-mi__hero-content .page-khuyn-mi__btn {
        margin-bottom: 15px;
    }
}