:root {
    --primary-color: #FF8C1A;
    --secondary-color: #FFA53A;
    --card-bg: #17191F;
    --background-color: #0D0E12;
    --text-main-color: #FFF3E6;
    --border-color: #A84F0C;
    --glow-color: #FFB04D;
    --deep-orange-color: #D96800;
}

.page-about-lich-su-va-tam-nhin {
    color: var(--text-main-color);
    background-color: var(--background-color);
    font-family: Arial, sans-serif;
    line-height: 1.6;
}

.page-about-lich-su-va-tam-nhin__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.page-about-lich-su-va-tam-nhin__hero-section {
    padding-top: 10px; /* Small top padding, relying on body padding-top from shared.css */
    background-color: var(--background-color);
    text-align: center;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 500px;
}

.page-about-lich-su-va-tam-nhin__hero-image-wrapper {
    width: 100%;
    max-height: 675px;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}

.page-about-lich-su-va-tam-nhin__hero-image {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    filter: brightness(0.6); /* Slightly darken image for text contrast */
}

.page-about-lich-su-va-tam-nhin__hero-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 10;
    max-width: 900px;
    width: 100%;
    padding: 20px;
    box-sizing: border-box;
    color: var(--text-main-color);
}

.page-about-lich-su-va-tam-nhin__main-title {
    color: var(--text-main-color);
    font-size: clamp(2em, 4vw, 3.5em); /* Using clamp for responsive font-size */
    margin-bottom: 15px;
    font-weight: bold;
    line-height: 1.2;
}

.page-about-lich-su-va-tam-nhin__subtitle {
    font-size: clamp(1em, 1.8vw, 1.3em);
    margin-bottom: 30px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    color: rgba(255, 243, 230, 0.9);
}

.page-about-lich-su-va-tam-nhin__cta-group {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.page-about-lich-su-va-tam-nhin__cta-button {
    padding: 12px 25px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
    white-space: nowrap;
    box-sizing: border-box;
}

.page-about-lich-su-va-tam-nhin__btn-primary {
    background: linear-gradient(180deg, var(--secondary-color) 0%, var(--deep-orange-color) 100%);
    color: #ffffff;
    border: 2px solid transparent;
}

.page-about-lich-su-va-tam-nhin__btn-primary:hover {
    opacity: 0.9;
    box-shadow: 0 0 15px var(--glow-color);
}

.page-about-lich-su-va-tam-nhin__btn-secondary {
    background: #ffffff;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.page-about-lich-su-va-tam-nhin__btn-secondary:hover {
    background: var(--primary-color);
    color: #ffffff;
    box-shadow: 0 0 15px var(--glow-color);
}

.page-about-lich-su-va-tam-nhin__content-section {
    padding: 60px 0;
}

.page-about-lich-su-va-tam-nhin__dark-bg {
    background-color: var(--background-color);
    color: var(--text-main-color);
}

.page-about-lich-su-va-tam-nhin__light-bg {
    background-color: #1a1b20; /* Slightly lighter dark background for contrast */
    color: var(--text-main-color);
}

.page-about-lich-su-va-tam-nhin__section-title {
    font-size: 2.5em;
    color: var(--secondary-color);
    text-align: center;
    margin-bottom: 40px;
    font-weight: bold;
}

.page-about-lich-su-va-tam-nhin__text-block {
    font-size: 1.1em;
    margin-bottom: 20px;
    line-height: 1.8;
    text-align: justify;
    color: rgba(255, 243, 230, 0.85);
}

.page-about-lich-su-va-tam-nhin__content-image {
    width: 100%;
    height: auto;
    display: block;
    margin: 40px auto;
    border-radius: 10px;
    object-fit: cover;
}

.page-about-lich-su-va-tam-nhin__timeline {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
    position: relative;
    padding-left: 20px;
    border-left: 2px solid var(--primary-color);
    margin-top: 40px;
}

.page-about-lich-su-va-tam-nhin__timeline-item {
    position: relative;
    padding-bottom: 20px;
}

.page-about-lich-su-va-tam-nhin__timeline-item::before {
    content: '';
    position: absolute;
    left: -27px;
    top: 0;
    width: 16px;
    height: 16px;
    background-color: var(--primary-color);
    border-radius: 50%;
    border: 4px solid var(--background-color);
}

.page-about-lich-su-va-tam-nhin__timeline-title {
    font-size: 1.5em;
    color: var(--secondary-color);
    margin-bottom: 10px;
}

.page-about-lich-su-va-tam-nhin__vision-mission,
.page-about-lich-su-va-tam-nhin__core-values,
.page-about-lich-su-va-tam-nhin__commitments,
.page-about-lich-su-va-tam-nhin__tech-features,
.page-about-lich-su-va-tam-nhin__team-culture {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.page-about-lich-su-va-tam-nhin__card {
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.page-about-lich-su-va-tam-nhin__card-title,
.page-about-lich-su-va-tam-nhin__value-title,
.page-about-lich-su-va-tam-nhin__feature-title,
.page-about-lich-su-va-tam-nhin__list-title {
    font-size: 1.4em;
    color: var(--secondary-color);
    margin-bottom: 15px;
    font-weight: bold;
}

.page-about-lich-su-va-tam-nhin__list {
    list-style: none;
    padding: 0;
    margin-top: 40px;
}

.page-about-lich-su-va-tam-nhin__list-item {
    background-color: var(--card-bg);
    padding: 25px;
    border-radius: 8px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.15);
}

.page-about-lich-su-va-tam-nhin__faq-section {
    padding: 60px 0;
}

.page-about-lich-su-va-tam-nhin__faq-list {
    margin-top: 40px;
}

.page-about-lich-su-va-tam-nhin__faq-item {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 15px;
    overflow: hidden;
}

.page-about-lich-su-va-tam-nhin__faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    font-size: 1.2em;
    font-weight: bold;
    color: var(--secondary-color);
    cursor: pointer;
    list-style: none;
    position: relative;
}

.page-about-lich-su-va-tam-nhin__faq-question::-webkit-details-marker {
    display: none;
}

.page-about-lich-su-va-tam-nhin__faq-question::marker {
    display: none;
}

.page-about-lich-su-va-tam-nhin__faq-toggle {
    font-size: 1.5em;
    line-height: 1;
    transition: transform 0.3s ease;
}

.page-about-lich-su-va-tam-nhin__faq-item[open] .page-about-lich-su-va-tam-nhin__faq-toggle {
    transform: rotate(45deg);
}

.page-about-lich-su-va-tam-nhin__faq-answer {
    padding: 0 25px 20px;
    font-size: 1em;
    color: rgba(255, 243, 230, 0.75);
}

.page-about-lich-su-va-tam-nhin__faq-answer .page-about-lich-su-va-tam-nhin__btn-primary {
    margin-top: 15px;
    display: inline-block;
}

.page-about-lich-su-va-tam-nhin__text-center {
    text-align: center;
}

.page-about-lich-su-va-tam-nhin__cta-bottom-section {
    padding-bottom: 60px;
}

/* General image responsiveness */
.page-about-lich-su-va-tam-nhin img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Mobile responsiveness */
@media (max-width: 768px) {
    .page-about-lich-su-va-tam-nhin__container {
        padding: 0 15px;
    }

    .page-about-lich-su-va-tam-nhin__hero-section {
        min-height: 400px;
    }

    .page-about-lich-su-va-tam-nhin__hero-content {
        padding: 15px;
    }

    .page-about-lich-su-va-tam-nhin__main-title {
        font-size: 2em;
        margin-bottom: 10px;
    }

    .page-about-lich-su-va-tam-nhin__subtitle {
        font-size: 1em;
        margin-bottom: 20px;
    }

    .page-about-lich-su-va-tam-nhin__cta-group {
        flex-direction: column;
        gap: 10px;
    }

    .page-about-lich-su-va-tam-nhin__cta-button,
    .page-about-lich-su-va-tam-nhin__btn-primary,
    .page-about-lich-su-va-tam-nhin__btn-secondary,
    .page-about-lich-su-va-tam-nhin a[class*="button"],
    .page-about-lich-su-va-tam-nhin a[class*="btn"] {
        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;
    }

    .page-about-lich-su-va-tam-nhin__section-title {
        font-size: 1.8em;
        margin-bottom: 30px;
    }

    .page-about-lich-su-va-tam-nhin__text-block {
        font-size: 1em;
    }

    .page-about-lich-su-va-tam-nhin__timeline {
        padding-left: 15px;
    }

    .page-about-lich-su-va-tam-nhin__timeline-item::before {
        left: -20px;
    }

    .page-about-lich-su-va-tam-nhin__vision-mission,
    .page-about-lich-su-va-tam-nhin__core-values,
    .page-about-lich-su-va-tam-nhin__commitments,
    .page-about-lich-su-va-tam-nhin__tech-features,
    .page-about-lich-su-va-tam-nhin__team-culture {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .page-about-lich-su-va-tam-nhin__card,
    .page-about-lich-su-va-tam-nhin__list-item {
        padding: 20px;
    }

    .page-about-lich-su-va-tam-nhin__card-title,
    .page-about-lich-su-va-tam-nhin__value-title,
    .page-about-lich-su-va-tam-nhin__feature-title,
    .page-about-lich-su-va-tam-nhin__list-title {
        font-size: 1.2em;
    }

    .page-about-lich-su-va-tam-nhin__faq-question {
        font-size: 1em;
        padding: 15px 20px;
    }

    .page-about-lich-su-va-tam-nhin__faq-answer {
        padding: 0 20px 15px;
    }

    /* Ensure all images in content sections are responsive */
    .page-about-lich-su-va-tam-nhin img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
    }
    .page-about-lich-su-va-tam-nhin__section,
    .page-about-lich-su-va-tam-nhin__card,
    .page-about-lich-su-va-tam-nhin__container {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px;
        padding-right: 15px;
    }
}