/* style/khuyen-mai.css */

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

.page-khuyen-mai {
    font-family: 'Arial', sans-serif;
    color: var(--khuyen-mai-text-main);
    background-color: var(--khuyen-mai-deep-navy); /* Fallback if shared.css var(--card-bg) is not dark enough */
    line-height: 1.6;
}

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

.page-khuyen-mai__top-section {
    padding-top: 10px; /* Rely on body padding-top from shared.css */
    padding-bottom: 60px;
    text-align: center;
    background: var(--khuyen-mai-primary-color);
    background-image: linear-gradient(180deg, var(--khuyen-mai-primary-color) 0%, var(--khuyen-mai-deep-navy) 100%);
}

.page-khuyen-mai__main-title {
    font-size: clamp(2.2rem, 4vw, 3.2rem);
    font-weight: 700;
    color: var(--khuyen-mai-gold-color);
    margin-bottom: 15px;
    line-height: 1.2;
    text-shadow: 0 0 10px rgba(79, 168, 255, 0.5);
}

.page-khuyen-mai__subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--khuyen-mai-text-secondary);
    max-width: 800px;
    margin: 0 auto 30px auto;
}

.page-khuyen-mai__cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    overflow: hidden;
}

.page-khuyen-mai__btn-primary,
.page-khuyen-mai__btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 30px;
    border-radius: 8px;
    font-weight: 700;
    font-size: 1rem;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    white-space: normal;
    word-wrap: break-word;
    text-align: center;
    max-width: 100%;
    box-sizing: border-box;
}

.page-khuyen-mai__btn-primary {
    background: var(--khuyen-mai-button-gradient);
    color: var(--khuyen-mai-text-main);
    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: transparent;
    color: var(--khuyen-mai-gold-color);
    border: 2px solid var(--khuyen-mai-gold-color);
    box-shadow: 0 4px 10px rgba(242, 193, 78, 0.2);
}

.page-khuyen-mai__btn-secondary:hover {
    background: rgba(242, 193, 78, 0.1);
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(242, 193, 78, 0.4);
}

.page-khuyen-mai__content-section {
    padding: 60px 0;
    background-color: var(--khuyen-mai-deep-navy);
}

.page-khuyen-mai__article-wrap {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
}

.page-khuyen-mai__section-heading {
    font-size: clamp(1.8rem, 3.5vw, 2.5rem);
    color: var(--khuyen-mai-gold-color);
    margin-top: 40px;
    margin-bottom: 25px;
    text-align: left;
    border-bottom: 2px solid var(--khuyen-mai-divider-color);
    padding-bottom: 10px;
}

.page-khuyen-mai__text-block {
    font-size: 1rem;
    color: var(--khuyen-mai-text-secondary);
    margin-bottom: 20px;
    text-align: justify;
}

.page-khuyen-mai__figure {
    margin: 30px 0;
    text-align: center;
}

.page-khuyen-mai__figure img {
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: 8px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
    margin: 0 auto;
}

.page-khuyen-mai__figcaption {
    font-size: 0.9rem;
    color: var(--khuyen-mai-text-secondary);
    margin-top: 10px;
    text-align: center;
}

.page-khuyen-mai__promo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin: 40px 0;
}

.page-khuyen-mai__promo-card {
    background-color: var(--khuyen-mai-card-bg);
    border: 1px solid var(--khuyen-mai-border-color);
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-khuyen-mai__promo-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.3);
}

.page-khuyen-mai__card-title {
    font-size: 1.4rem;
    color: var(--khuyen-mai-gold-color);
    margin-bottom: 15px;
    font-weight: 600;
}

.page-khuyen-mai__card-text {
    font-size: 0.95rem;
    color: var(--khuyen-mai-text-secondary);
    margin-bottom: 25px;
    line-height: 1.5;
}

.page-khuyen-mai__card-button {
    display: inline-block;
    background: var(--khuyen-mai-button-gradient);
    color: var(--khuyen-mai-text-main);
    padding: 10px 20px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: background 0.3s ease;
    white-space: normal;
    word-wrap: break-word;
    max-width: 100%;
    box-sizing: border-box;
}

.page-khuyen-mai__card-button:hover {
    background: linear-gradient(180deg, #1144A6 0%, #2B73F6 100%);
}

.page-khuyen-mai__step-list {
    list-style: none;
    padding: 0;
    margin: 40px 0;
}

.page-khuyen-mai__list-item {
    background-color: var(--khuyen-mai-card-bg);
    border: 1px solid var(--khuyen-mai-border-color);
    border-radius: 10px;
    padding: 25px;
    margin-bottom: 20px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
}

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

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

.page-khuyen-mai__terms-list,
.page-khuyen-mai__benefits-list {
    list-style: disc;
    padding-left: 25px;
    margin: 30px 0;
    color: var(--khuyen-mai-text-secondary);
}

.page-khuyen-mai__terms-list .page-khuyen-mai__list-item,
.page-khuyen-mai__benefits-list .page-khuyen-mai__list-item {
    background: none;
    border: none;
    padding: 5px 0;
    margin-bottom: 10px;
    box-shadow: none;
    color: var(--khuyen-mai-text-secondary);
}

.page-khuyen-mai__terms-list .page-khuyen-mai__list-item strong {
    color: var(--khuyen-mai-gold-color);
}

.page-khuyen-mai__faq-section {
    margin-top: 40px;
}

.page-khuyen-mai__faq-item {
    background-color: var(--khuyen-mai-card-bg);
    border: 1px solid var(--khuyen-mai-border-color);
    border-radius: 8px;
    margin-bottom: 15px;
    overflow: hidden;
    color: var(--khuyen-mai-text-main);
}

.page-khuyen-mai__faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 25px;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--khuyen-mai-gold-color);
    cursor: pointer;
    background-color: var(--khuyen-mai-primary-color);
    border-bottom: 1px solid var(--khuyen-mai-border-color);
}

.page-khuyen-mai__faq-question:hover {
    background-color: var(--khuyen-mai-secondary-color);
}

.page-khuyen-mai__faq-item[open] .page-khuyen-mai__faq-question {
    border-bottom: 1px solid transparent; /* Hide border when open */
}

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

.page-khuyen-mai__faq-toggle {
    font-size: 1.5rem;
    line-height: 1;
    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: 0.95rem;
    color: var(--khuyen-mai-text-secondary);
    line-height: 1.6;
}

.page-khuyen-mai__faq-item:not([open]) .page-khuyen-mai__faq-answer {
    display: none;
}

.page-khuyen-mai__final-cta {
    background-color: var(--khuyen-mai-primary-color);
    border-radius: 12px;
    padding: 40px;
    text-align: center;
    margin-top: 60px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
    background-image: linear-gradient(135deg, var(--khuyen-mai-primary-color) 0%, var(--khuyen-mai-secondary-color) 100%);
}

.page-khuyen-mai__final-cta-title {
    font-size: clamp(1.8rem, 3vw, 2.2rem);
    color: var(--khuyen-mai-gold-color);
    margin-bottom: 15px;
}

.page-khuyen-mai__final-cta-text {
    font-size: 1.1rem;
    color: var(--khuyen-mai-text-main);
    margin-bottom: 30px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* --- Responsive Styles --- */

/* Tablet */
@media (max-width: 1024px) {
    .page-khuyen-mai__main-title {
        font-size: clamp(2rem, 5vw, 2.8rem);
    }

    .page-khuyen-mai__subtitle {
        font-size: clamp(0.95rem, 2.5vw, 1.15rem);
    }

    .page-khuyen-mai__section-heading {
        font-size: clamp(1.6rem, 3.8vw, 2.2rem);
    }

    .page-khuyen-mai__promo-card {
        padding: 25px;
    }

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

    .page-khuyen-mai__card-text {
        font-size: 0.9rem;
    }

    .page-khuyen-mai__final-cta-title {
        font-size: clamp(1.6rem, 3.5vw, 2rem);
    }

    .page-khuyen-mai__final-cta-text {
        font-size: 1rem;
    }
}

/* Mobile */
@media (max-width: 768px) {
    /* 1. 顶区标题 + 双 CTA */
    .page-khuyen-mai__top-section {
        padding-top: 10px !important;
        padding-bottom: 40px;
    }

    .page-khuyen-mai__main-title {
        font-size: clamp(1.8rem, 7vw, 2.5rem);
        margin-bottom: 10px;
    }

    .page-khuyen-mai__subtitle {
        font-size: clamp(0.9rem, 3.5vw, 1rem);
        margin-bottom: 20px;
        padding: 0 10px;
    }

    .page-khuyen-mai__cta-buttons {
        flex-direction: column;
        align-items: center;
        gap: 15px;
        padding: 0 15px;
    }

    .page-khuyen-mai__btn-primary,
    .page-khuyen-mai__btn-secondary {
        width: 100% !important;
        max-width: 100% !important;
        padding: 12px 15px;
        font-size: 0.95rem;
        box-sizing: border-box !important;
        white-space: normal !important;
        word-wrap: break-word !important;
    }

    /* 2. 单栏长文容器 */
    .page-khuyen-mai__content-section {
        padding: 40px 0;
    }

    .page-khuyen-mai__article-wrap {
        padding: 0 15px;
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }

    .page-khuyen-mai__section-heading {
        font-size: clamp(1.5rem, 6vw, 2rem);
        margin-top: 30px;
        margin-bottom: 20px;
        text-align: center;
    }

    .page-khuyen-mai__text-block {
        font-size: 0.9rem;
        margin-bottom: 15px;
    }

    .page-khuyen-mai__promo-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        margin: 30px 0;
    }

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

    .page-khuyen-mai__card-title {
        font-size: 1.2rem;
    }

    .page-khuyen-mai__card-text {
        font-size: 0.85rem;
    }

    .page-khuyen-mai__card-button {
        font-size: 0.85rem;
        padding: 8px 15px;
        width: 100%;
        box-sizing: border-box !important;
        max-width: 100% !important;
    }

    .page-khuyen-mai__step-list {
        margin: 30px 0;
    }

    .page-khuyen-mai__list-item {
        padding: 20px;
        margin-bottom: 15px;
    }

    .page-khuyen-mai__step-title {
        font-size: 1.1rem;
    }

    .page-khuyen-mai__step-description {
        font-size: 0.9rem;
    }

    .page-khuyen-mai__terms-list,
    .page-khuyen-mai__benefits-list {
        padding-left: 20px;
        margin: 20px 0;
        font-size: 0.9rem;
    }

    /* 3. 通用图片与 figure */
    .page-khuyen-mai__figure img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
        box-sizing: border-box !important;
    }

    .page-khuyen-mai__figcaption {
        font-size: 0.8rem;
    }

    /* 4. 按钮与按钮容器 (already covered in top-section and promo-card) */
    .page-khuyen-mai__final-cta .page-khuyen-mai__btn-primary {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px;
        padding-right: 15px;
    }

    /* 5. FAQ 区块 */
    .page-khuyen-mai__faq-question {
        padding: 15px 20px;
        font-size: 1rem;
    }

    .page-khuyen-mai__faq-toggle {
        font-size: 1.3rem;
    }

    .page-khuyen-mai__faq-answer {
        padding: 0 20px 15px 20px;
        font-size: 0.9rem;
    }

    .page-khuyen-mai__final-cta {
        padding: 30px 20px;
        margin-top: 40px;
    }

    .page-khuyen-mai__final-cta-title {
        font-size: clamp(1.5rem, 6vw, 1.8rem);
    }

    .page-khuyen-mai__final-cta-text {
        font-size: 0.95rem;
        margin-bottom: 25px;
    }
}

/* Ensure all content containers are responsive */
.page-khuyen-mai__container,
.page-khuyen-mai__section,
.page-khuyen-mai__promo-grid,
.page-khuyen-mai__step-list,
.page-khuyen-mai__terms-list,
.page-khuyen-mai__benefits-list,
.page-khuyen-mai__faq-section {
    max-width: 100%;
    width: 100%;
    box-sizing: border-box;
    overflow: hidden; /* Prevent horizontal scroll */
}