:root {
    --primary-color: #11A84E;
    --secondary-color: #22C768;
    --button-gradient: linear-gradient(180deg, #2AD16F 0%, #13994A 100%);
    --card-bg: #11271B;
    --page-bg: #08160F;
    --text-main: #F2FFF6;
    --text-secondary: #A7D9B8;
    --border-color: #2E7A4E;
    --glow-color: #57E38D;
    --gold-color: #F2C14E;
    --divider-color: #1E3A2A;
    --deep-green: #0A4B2C;
}

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

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

.page-about__section {
    padding: 80px 0;
    text-align: center;
    position: relative;
}

.page-about__section-title {
    font-size: clamp(2.2rem, 4vw, 3.2rem); /* Flexible font size */
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 20px;
    line-height: 1.2;
    letter-spacing: -0.03em;
}

.page-about__section-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto 40px auto;
}

.page-about__sub-title {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 600;
    color: var(--gold-color);
    margin-top: 40px;
    margin-bottom: 15px;
}

.page-about__hero-section {
    position: relative;
    padding: 10px 0 80px 0; /* Small top padding, not var(--header-offset) */
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background-color: var(--page-bg); /* Fallback */
}

.page-about__hero-image-wrapper {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    overflow: hidden;
}

.page-about__hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.2; /* Subtle background effect */
    display: block;
}

.page-about__hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
    padding: 40px 20px;
    text-align: center;
    color: var(--text-main);
}

.page-about__main-title {
    font-size: clamp(2.8rem, 5vw, 4.5rem); /* Flexible H1 font size */
    font-weight: 800;
    color: var(--text-main);
    margin-bottom: 20px;
    line-height: 1.1;
    letter-spacing: -0.05em;
    text-shadow: 0 0 10px rgba(0,255,0,0.3);
}

.page-about__hero-description {
    font-size: 1.2rem;
    margin-bottom: 40px;
    color: var(--text-secondary);
}

.page-about__cta-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
    margin-top: 30px;
}

.page-about__btn-primary,
.page-about__btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 15px 30px;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    cursor: pointer;
    max-width: 100%; /* Ensure responsiveness */
    box-sizing: border-box; /* Ensure responsiveness */
    white-space: normal; /* Allow text wrapping */
    word-wrap: break-word; /* Allow text wrapping */
}

.page-about__btn-primary {
    background: var(--button-gradient);
    color: #ffffff;
    border: none;
}

.page-about__btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0,255,0,0.3);
}

.page-about__btn-secondary {
    background: transparent;
    color: var(--gold-color);
    border: 2px solid var(--gold-color);
}

.page-about__btn-secondary:hover {
    background: var(--gold-color);
    color: var(--deep-green);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(242,193,78,0.3);
}

.page-about__btn-small {
    padding: 10px 20px;
    font-size: 1rem;
}

.page-about__btn-large {
    padding: 18px 35px;
    font-size: 1.2rem;
}

/* Content Area */
.page-about__introduction,
.page-about__commitment,
.page-about__future {
    background-color: var(--card-bg); /* Darker background for content */
    color: var(--text-main);
}

.page-about__why-choose,
.page-about__faq {
    background-color: var(--page-bg); /* Lighter background for contrast */
    color: var(--text-main);
}

.page-about__content-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
    align-items: center;
    margin-top: 60px;
    text-align: left;
}

.page-about__content-grid--reverse {
    flex-direction: row-reverse;
}

.page-about__text-block {
    flex: 1;
    min-width: 300px;
    padding: 20px;
    box-sizing: border-box;
}

.page-about__image-block {
    flex: 1;
    min-width: 300px;
    text-align: center;
}

.page-about__content-image {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.5);
    display: block;
    margin: 0 auto;
}

.page-about__values-list {
    list-style: none;
    padding: 0;
    margin-top: 20px;
    text-align: left;
}

.page-about__values-list li {
    margin-bottom: 15px;
    padding-left: 30px;
    position: relative;
    color: var(--text-secondary);
}

.page-about__values-list li strong {
    color: var(--text-main);
}

.page-about__values-list li::before {
    content: '✅';
    position: absolute;
    left: 0;
    color: var(--glow-color);
    font-size: 1.2em;
    line-height: 1;
}

/* Feature Cards */
.page-about__feature-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.page-about__card {
    background-color: var(--deep-green); /* Card BG color */
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 6px 20px rgba(0,0,0,0.3);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.page-about__card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,255,0,0.4);
}

.page-about__card-image {
    max-width: 100%;
    height: 200px; /* Fixed height for consistency */
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 20px;
    display: block;
}

.page-about__card-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gold-color);
    margin-bottom: 15px;
}

.page-about__card-text {
    font-size: 1rem;
    color: var(--text-secondary);
    flex-grow: 1; /* Push link to bottom */
}

.page-about__card-link {
    color: var(--glow-color);
    text-decoration: none;
    font-weight: 600;
    margin-top: 20px;
    display: inline-block;
    transition: color 0.3s ease;
}

.page-about__card-link:hover {
    color: var(--text-main);
    text-decoration: underline;
}

/* Product Cards */
.page-about__product-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.page-about__product-card {
    background-color: var(--deep-green);
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 6px 20px rgba(0,0,0,0.3);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.page-about__product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,255,0,0.4);
}

.page-about__product-image {
    max-width: 100%;
    height: 180px; /* Consistent height */
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 20px;
    display: block;
}

.page-about__product-title {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.page-about__product-title a {
    color: var(--gold-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.page-about__product-title a:hover {
    color: var(--glow-color);
}

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

/* Commitment Grid */
.page-about__commitment-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.page-about__commitment-item {
    background-color: var(--deep-green);
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 6px 20px rgba(0,0,0,0.3);
    text-align: center;
    border: 1px solid var(--border-color);
}

.page-about__commitment-icon {
    width: 80px;
    height: 80px;
    object-fit: contain;
    margin-bottom: 20px;
    display: block;
    margin-left: auto;
    margin-right: auto;
}

.page-about__commitment-heading {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--gold-color);
    margin-bottom: 10px;
}

.page-about__commitment-text {
    font-size: 1rem;
    color: var(--text-secondary);
}

/* FAQ Section */
.page-about__faq-list {
    max-width: 800px;
    margin: 40px auto 0 auto;
    text-align: left;
}

.page-about__faq-item {
    background-color: var(--deep-green);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 15px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.page-about__faq-item summary {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 25px;
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-main);
    cursor: pointer;
    list-style: none; /* Hide default marker */
    background-color: var(--deep-green);
    border-bottom: 1px solid var(--divider-color);
}

.page-about__faq-item summary::-webkit-details-marker {
    display: none; /* Hide default marker for webkit browsers */
}

.page-about__faq-item[open] summary {
    color: var(--gold-color);
    border-bottom: 1px solid var(--gold-color);
}

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

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

.page-about__faq-answer {
    padding: 15px 25px 20px 25px;
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.page-about__faq-answer p {
    margin-bottom: 15px;
}
.page-about__faq-answer p:last-child {
    margin-bottom: 0;
}

/* CTA Section */
.page-about__cta-section {
    padding: 100px 0;
    background-color: var(--deep-green); /* Use deep green for a strong CTA */
    background-image: url('[GALLERY:bg:1920x1080:7fun7_nha_cai,cta_background,green_gold_abstract,dynamic_lines]'); /* Example background */
    background-size: cover;
    background-position: center;
    position: relative;
}

.page-about__cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0,0,0,0.5); /* Overlay for readability */
    z-index: 0;
}

.page-about__cta-container {
    position: relative;
    z-index: 1;
    max-width: 900px;
}

/* Responsive adjustments */
@media (max-width: 1024px) {
    .page-about__section {
        padding: 60px 0;
    }
    .page-about__hero-content {
        padding: 30px 15px;
    }
    .page-about__main-title {
        font-size: clamp(2.5rem, 4.5vw, 4rem);
    }
    .page-about__hero-description {
        font-size: 1.1rem;
    }
    .page-about__content-grid {
        flex-direction: column;
        gap: 30px;
    }
    .page-about__content-grid--reverse {
        flex-direction: column; /* Consistent for mobile */
    }
    .page-about__text-block,
    .page-about__image-block {
        width: 100%;
        min-width: unset;
        padding: 0;
    }
    .page-about__feature-cards,
    .page-about__product-cards,
    .page-about__commitment-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 20px;
    }
    .page-about__card,
    .page-about__product-card,
    .page-about__commitment-item {
        padding: 20px;
    }
    .page-about__card-image,
    .page-about__product-image {
        height: 160px;
    }
    .page-about__faq-item summary {
        padding: 15px 20px;
        font-size: 1.1rem;
    }
    .page-about__faq-answer {
        padding: 10px 20px 15px 20px;
    }
}

@media (max-width: 768px) {
    .page-about {
        font-size: 16px;
        line-height: 1.6;
    }
    .page-about__container {
        padding: 0 15px; /* Mobile padding */
    }
    .page-about__section {
        padding: 40px 0;
    }
    .page-about__hero-section {
        padding: 10px 0 60px 0; /* Adjust top padding for mobile */
    }
    .page-about__main-title {
        font-size: clamp(2rem, 8vw, 3rem);
        margin-bottom: 15px;
    }
    .page-about__hero-description {
        font-size: 1rem;
        margin-bottom: 30px;
    }
    .page-about__cta-buttons {
        flex-direction: column;
        gap: 15px;
    }
    .page-about__btn-primary,
    .page-about__btn-secondary {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding: 12px 20px !important;
        font-size: 1rem !important;
        white-space: normal !important;
        word-wrap: break-word !important;
    }
    .page-about__btn-large {
        padding: 15px 25px !important;
        font-size: 1.1rem !important;
    }

    .page-about__section-title {
        font-size: clamp(1.8rem, 7vw, 2.5rem);
        margin-bottom: 15px;
    }
    .page-about__section-description {
        font-size: 1rem;
        margin-bottom: 30px;
    }
    .page-about__sub-title {
        font-size: clamp(1.4rem, 6vw, 2rem);
        margin-top: 30px;
    }

    /* Mobile image responsiveness */
    .page-about img {
        max-width: 100% !important;
        height: auto !important;
        display: block !important;
    }
    .page-about__image-block,
    .page-about__card,
    .page-about__product-card,
    .page-about__commitment-item,
    .page-about__faq-item {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }
    /* Specific padding for containers to prevent overflow */
    .page-about__introduction .page-about__container,
    .page-about__why-choose .page-about__container,
    .page-about__products .page-about__container,
    .page-about__commitment .page-about__container,
    .page-about__future .page-about__container,
    .page-about__faq .page-about__container,
    .page-about__cta-section .page-about__cta-container {
        padding-left: 15px !important;
        padding-right: 15px !important;
    }

    .page-about__feature-cards,
    .page-about__product-cards,
    .page-about__commitment-grid {
        grid-template-columns: 1fr; /* Single column on small screens */
        gap: 20px;
    }
    .page-about__card-image,
    .page-about__product-image {
        height: auto; /* Allow auto height for better aspect ratio on mobile */
        max-height: 200px; /* Max height to prevent overly tall images */
    }
    .page-about__faq-item summary {
        font-size: 1rem;
    }
    .page-about__faq-answer {
        font-size: 0.95rem;
    }
    .page-about__cta-section {
        padding: 60px 0;
    }
}

@media (max-width: 480px) {
    .page-about__main-title {
        font-size: clamp(1.8rem, 9vw, 2.5rem);
    }
    .page-about__hero-description {
        font-size: 0.95rem;
    }
    .page-about__section-title {
        font-size: clamp(1.6rem, 8vw, 2.2rem);
    }
    .page-about__sub-title {
        font-size: clamp(1.2rem, 7vw, 1.8rem);
    }
    .page-about__card-title, .page-about__product-title {
        font-size: 1.3rem;
    }
}