:root {
    --primary-color: #C91F17;
    --secondary-color: #E53935;
    --button-gradient: linear-gradient(180deg, #FFD86A 0%, #E6B800 100%);
    --card-bg: #D32F2F;
    --section-bg: #B71C1C; /* Used for sections that need a distinct background */
    --text-main: #FFF5E1;
    --border-color: #F2B544;
    --glow-color: #FFCC66;
    --gold-color: #F4D34D;
    --deep-red: #7A0E0E;
    --default-text-color: #333333; /* For light backgrounds */
    --default-bg-color: #ffffff; /* For light sections */
}

/* Base styles for the page */
.page-khuyen-mai-hoan-tra {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-main); /* Assuming body background is dark */
    background-color: var(--section-bg);
}

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

.page-khuyen-mai-hoan-tra__hero-section {
    padding-top: 10px; /* Small top padding as body handles --header-offset */
    max-width: 100%;
    margin: 0 auto;
    text-align: center;
    background-color: var(--deep-red);
    color: var(--text-main);
    padding-bottom: 30px;
}

.page-khuyen-mai-hoan-tra__hero-image img {
    width: 100%;
    height: auto;
    display: block;
    max-width: 100%;
    margin-bottom: 20px;
}

.page-khuyen-mai-hoan-tra__main-title {
    font-size: clamp(2.2rem, 4vw, 3.5rem); /* Using clamp for H1 */
    font-weight: bold;
    line-height: 1.2;
    margin-bottom: 15px;
    color: var(--gold-color);
    text-shadow: 0 0 8px rgba(255, 204, 102, 0.7);
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.page-khuyen-mai-hoan-tra__hero-description {
    font-size: 1.15rem;
    margin-bottom: 30px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    color: var(--text-main);
}

.page-khuyen-mai-hoan-tra__cta-button {
    display: inline-block;
    padding: 15px 30px;
    background: var(--button-gradient);
    color: var(--deep-red);
    text-decoration: none;
    border-radius: 8px;
    font-weight: bold;
    font-size: 1.1rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    border: 2px solid var(--border-color);
    max-width: 100%;
    box-sizing: border-box;
    white-space: normal;
    word-wrap: break-word;
}

.page-khuyen-mai-hoan-tra__cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.page-khuyen-mai-hoan-tra__cta-button--large {
    padding: 18px 40px;
    font-size: 1.25rem;
}

.page-khuyen-mai-hoan-tra__secondary-button {
    display: inline-block;
    padding: 12px 25px;
    background-color: transparent;
    color: var(--gold-color);
    border: 2px solid var(--gold-color);
    text-decoration: none;
    border-radius: 8px;
    font-weight: bold;
    font-size: 1rem;
    transition: background-color 0.3s ease, color 0.3s ease;
    max-width: 100%;
    box-sizing: border-box;
    white-space: normal;
    word-wrap: break-word;
}

.page-khuyen-mai-hoan-tra__secondary-button:hover {
    background-color: var(--gold-color);
    color: var(--deep-red);
}

.page-khuyen-mai-hoan-tra__intro-section,
.page-khuyen-mai-hoan-tra__details-section,
.page-khuyen-mai-hoan-tra__benefits-section,
.page-khuyen-mai-hoan-tra__how-to-claim-section,
.page-khuyen-mai-hoan-tra__faq-section,
.page-khuyen-mai-hoan-tra__cta-bottom-section {
    padding: 60px 0;
    background-color: var(--section-bg);
    color: var(--text-main);
}

.page-khuyen-mai-hoan-tra__section-title {
    font-size: 2.5rem;
    font-weight: bold;
    text-align: center;
    margin-bottom: 40px;
    color: var(--gold-color);
    text-shadow: 0 0 5px rgba(255, 204, 102, 0.5);
}

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

.page-khuyen-mai-hoan-tra__text-block a {
    color: var(--gold-color);
    text-decoration: underline;
}
.page-khuyen-mai-hoan-tra__text-block a:hover {
    color: var(--glow-color);
}

.page-khuyen-mai-hoan-tra__content-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 30px;
}

.page-khuyen-mai-hoan-tra__card {
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
    text-align: center;
    transition: transform 0.3s ease;
    border: 1px solid var(--border-color);
    color: var(--text-main);
}

.page-khuyen-mai-hoan-tra__card:hover {
    transform: translateY(-5px);
}

.page-khuyen-mai-hoan-tra__card-image {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 8px;
    margin-bottom: 20px;
    min-height: 200px;
    object-fit: cover;
}

.page-khuyen-mai-hoan-tra__card-title {
    font-size: 1.6rem;
    font-weight: bold;
    margin-bottom: 15px;
    color: var(--gold-color);
}

.page-khuyen-mai-hoan-tra__card-text {
    font-size: 0.95rem;
    color: var(--text-main);
}

.page-khuyen-mai-hoan-tra__benefit-list {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-top: 30px;
}

.page-khuyen-mai-hoan-tra__benefit-item {
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.25);
    border-left: 5px solid var(--gold-color);
    color: var(--text-main);
}

.page-khuyen-mai-hoan-tra__benefit-title {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 10px;
    color: var(--gold-color);
}

.page-khuyen-mai-hoan-tra__benefit-text {
    font-size: 0.95rem;
    color: var(--text-main);
}

.page-khuyen-mai-hoan-tra__steps-list {
    list-style: none;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 25px;
    margin-top: 30px;
}

.page-khuyen-mai-hoan-tra__step-item {
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.25);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    border: 1px solid var(--border-color);
    color: var(--text-main);
}

.page-khuyen-mai-hoan-tra__step-title {
    font-size: 1.6rem;
    font-weight: bold;
    margin-bottom: 10px;
    color: var(--gold-color);
}

.page-khuyen-mai-hoan-tra__step-text {
    font-size: 1rem;
    color: var(--text-main);
    text-align: justify;
}
.page-khuyen-mai-hoan-tra__step-text a {
    color: var(--gold-color);
    text-decoration: underline;
}
.page-khuyen-mai-hoan-tra__step-text a:hover {
    color: var(--glow-color);
}


.page-khuyen-mai-hoan-tra__faq-list {
    margin-top: 30px;
}

.page-khuyen-mai-hoan-tra__faq-item {
    background-color: var(--card-bg);
    border-radius: 10px;
    margin-bottom: 15px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    color: var(--text-main);
}

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

.page-khuyen-mai-hoan-tra__faq-question::-webkit-details-marker {
    display: none;
}
.page-khuyen-mai-hoan-tra__faq-question::marker {
    display: none;
}

.page-khuyen-mai-hoan-tra__faq-toggle {
    font-size: 1.5rem;
    line-height: 1;
    transition: transform 0.3s ease;
}

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

.page-khuyen-mai-hoan-tra__faq-answer {
    padding: 0 25px 20px;
    font-size: 1rem;
    color: var(--text-main);
    text-align: justify;
}

.page-khuyen-mai-hoan-tra__cta-bottom-section {
    text-align: center;
    padding-top: 80px;
    padding-bottom: 80px;
    background-color: var(--deep-red);
    color: var(--text-main);
}

.page-khuyen-mai-hoan-tra__cta-bottom-section .page-khuyen-mai-hoan-tra__section-title {
    margin-bottom: 20px;
    color: var(--gold-color);
}

.page-khuyen-mai-hoan-tra__cta-bottom-section .page-khuyen-mai-hoan-tra__text-block {
    max-width: 800px;
    margin: 0 auto 40px auto;
    font-size: 1.1rem;
}

.page-khuyen-mai-hoan-tra__cta-image {
    width: 100%;
    height: auto;
    display: block;
    max-width: 900px;
    margin: 40px auto 0 auto;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    min-height: 200px;
    object-fit: cover;
}

/* --- Responsive Styles --- */
@media (max-width: 1024px) {
    .page-khuyen-mai-hoan-tra__main-title {
        font-size: clamp(2rem, 5vw, 3rem);
    }
    .page-khuyen-mai-hoan-tra__section-title {
        font-size: 2.2rem;
    }
    .page-khuyen-mai-hoan-tra__content-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .page-khuyen-mai-hoan-tra__benefit-list {
        grid-template-columns: repeat(1, 1fr);
    }
}

@media (max-width: 768px) {
    /* HERO 主图区域 */
    .page-khuyen-mai-hoan-tra__hero-section {
        padding-top: 10px !important;
        padding-bottom: 20px;
    }
    .page-khuyen-mai-hoan-tra__hero-image img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
    }
    .page-khuyen-mai-hoan-tra__main-title {
        font-size: clamp(1.8rem, 7vw, 2.5rem);
        margin-bottom: 10px;
        padding: 0 15px;
    }
    .page-khuyen-mai-hoan-tra__hero-description {
        font-size: 1rem;
        margin-bottom: 20px;
        padding: 0 15px;
    }

    /* 按钮与按钮容器 */
    .page-khuyen-mai-hoan-tra__cta-button,
    .page-khuyen-mai-hoan-tra__secondary-button {
        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;
        margin-bottom: 15px;
    }
    .page-khuyen-mai-hoan-tra__cta-button:last-child,
    .page-khuyen-mai-hoan-tra__secondary-button:last-child {
        margin-bottom: 0;
    }
    .page-khuyen-mai-hoan-tra__hero-content,
    .page-khuyen-mai-hoan-tra__intro-section .page-khuyen-mai-hoan-tra__container,
    .page-khuyen-mai-hoan-tra__how-to-claim-section .page-khuyen-mai-hoan-tra__container,
    .page-khuyen-mai-hoan-tra__cta-bottom-section .page-khuyen-mai-hoan-tra__container {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }

    /* 通用图片与容器 */
    .page-khuyen-mai-hoan-tra img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
        display: block;
    }
    .page-khuyen-mai-hoan-tra__section,
    .page-khuyen-mai-hoan-tra__card,
    .page-khuyen-mai-hoan-tra__container {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px;
        padding-right: 15px;
    }
    .page-khuyen-mai-hoan-tra__cta-image {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
    }

    .page-khuyen-mai-hoan-tra__section-title {
        font-size: 1.8rem;
        margin-bottom: 25px;
    }
    .page-khuyen-mai-hoan-tra__content-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .page-khuyen-mai-hoan-tra__card {
        padding: 20px;
    }
    .page-khuyen-mai-hoan-tra__card-title {
        font-size: 1.4rem;
    }
    .page-khuyen-mai-hoan-tra__benefit-list {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .page-khuyen-mai-hoan-tra__benefit-title {
        font-size: 1.3rem;
    }
    .page-khuyen-mai-hoan-tra__steps-list {
        gap: 20px;
    }
    .page-khuyen-mai-hoan-tra__step-title {
        font-size: 1.4rem;
    }
    .page-khuyen-mai-hoan-tra__faq-question {
        font-size: 1rem;
        padding: 15px 20px;
    }
    .page-khuyen-mai-hoan-tra__faq-answer {
        padding: 0 20px 15px;
    }
    /* 长文区 */
    .page-khuyen-mai-hoan-tra__text-block,
    .page-khuyen-mai-hoan-tra__card-text,
    .page-khuyen-mai-hoan-tra__benefit-text,
    .page-khuyen-mai-hoan-tra__step-text,
    .page-khuyen-mai-hoan-tra__faq-answer p {
        font-size: 0.95rem;
    }
}

@media (max-width: 480px) {
    .page-khuyen-mai-hoan-tra__main-title {
        font-size: clamp(1.6rem, 8vw, 2.2rem);
    }
    .page-khuyen-mai-hoan-tra__section-title {
        font-size: 1.6rem;
    }
    .page-khuyen-mai-hoan-tra__cta-button {
        font-size: 1rem;
        padding: 12px 20px;
    }
    .page-khuyen-mai-hoan-tra__cta-button--large {
        font-size: 1.1rem;
        padding: 15px 25px;
    }
}