:root {
    --primary-color: #113B7A;
    --secondary-color: #1D5FD1;
    --btn-gradient: linear-gradient(180deg, #2B73F6 0%, #1144A6 100%);
    --card-bg: #10233F;
    --text-main: #F3F8FF;
    --text-secondary: #AFC4E8;
    --border-color: #244D84;
    --glow-color: #4FA8FF;
    --gold-color: #F2C14E;
    --divider-color: #1B3357;
    --deep-navy: #08162B; /* Assuming this is the body background from shared.css */
}

.page-about {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-main); /* Light text on dark body background */
    background-color: var(--deep-navy); /* Ensure consistency if body bg is not fully global */
}

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

.page-about__section {
    padding: 60px 0;
    text-align: center;
}

.page-about__dark-section {
    background-color: var(--card-bg); /* Use specified card background for dark sections */
    color: var(--text-main);
}

.page-about__section-title {
    font-size: clamp(28px, 4vw, 42px); /* Use clamp for H1, H2 */
    color: var(--gold-color); /* Gold color for main titles */
    margin-bottom: 20px;
    font-weight: 700;
    line-height: 1.2;
    text-shadow: 0 0 8px rgba(242, 193, 78, 0.4); /* Subtle glow */
}

.page-about__section-description {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* Hero Section */
.page-about__hero-section {
    position: relative;
    overflow: hidden;
    padding-top: 10px; /* Small top padding, assuming body handles header offset */
    background-color: var(--deep-navy);
}

.page-about__hero-image-wrapper {
    width: 100%;
    height: auto;
    display: block;
    position: relative;
    z-index: 1;
}

.page-about__hero-image {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    aspect-ratio: 16 / 9;
}

.page-about__hero-content-wrapper {
    position: relative;
    z-index: 2;
    padding: 40px 20px 60px;
    background: linear-gradient(to top, var(--deep-navy) 0%, rgba(8, 22, 43, 0.8) 50%, rgba(8, 22, 43, 0.5) 100%);
    margin-top: -100px; /* Pull content up over image a bit for visual flow */
    position: relative;
}

.page-about__hero-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.page-about__main-title {
    font-size: clamp(36px, 5vw, 56px); /* H1 font size with clamp */
    color: var(--gold-color);
    margin-bottom: 20px;
    font-weight: 900;
    line-height: 1.1;
    text-shadow: 0 0 15px rgba(242, 193, 78, 0.6);
}

.page-about__hero-description {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 30px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.page-about__cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 30px;
    width: 100%; /* Ensure container takes full width for responsive button handling */
    max-width: 100%;
    box-sizing: border-box;
    overflow: hidden;
}

.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: 18px;
    font-weight: bold;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    cursor: pointer;
    white-space: normal;
    word-wrap: break-word;
    max-width: 100%; /* Ensure buttons don't overflow */
    box-sizing: border-box;
}

.page-about__btn-primary {
    background: var(--btn-gradient);
    color: var(--text-main);
    border: none;
}

.page-about__btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    opacity: 0.9;
}

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

.page-about__btn-secondary:hover {
    background: rgba(242, 193, 78, 0.1);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* General Content Layout */
.page-about__content-flex {
    display: flex;
    align-items: center;
    gap: 40px;
    text-align: left;
    margin-top: 40px;
}

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

.page-about__text-block {
    flex: 1;
    padding: 20px;
}

.page-about__text-block p {
    margin-bottom: 15px;
    font-size: 17px;
    color: var(--text-secondary);
}

.page-about__text-block a {
    color: var(--gold-color);
    text-decoration: none;
    font-weight: bold;
}

.page-about__text-block a:hover {
    text-decoration: underline;
}

.page-about__image-block {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.page-about__image-content {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
    display: block;
}

/* Core Values Grid */
.page-about__values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.page-about__value-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
}

.page-about__value-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.page-about__value-icon {
    width: 200px; /* Min size 200x200 */
    height: auto;
    margin-bottom: 20px;
    object-fit: contain;
    border-radius: 5px;
}

.page-about__value-title {
    font-size: 24px;
    color: var(--gold-color);
    margin-bottom: 10px;
    font-weight: 700;
}

.page-about__value-description {
    font-size: 16px;
    color: var(--text-secondary);
    flex-grow: 1;
}

/* FAQ Section */
.page-about__faq-list {
    max-width: 900px;
    margin: 40px auto 0;
    text-align: left;
}

details.page-about__faq-item {
    margin-bottom: 15px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    background: var(--card-bg);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}
details.page-about__faq-item summary.page-about__faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 25px;
    cursor: pointer;
    user-select: none;
    list-style: none;
    transition: background-color 0.3s ease;
    color: var(--text-main);
    font-weight: 600;
}
details.page-about__faq-item summary.page-about__faq-question::-webkit-details-marker {
    display: none;
}
details.page-about__faq-item summary.page-about__faq-question:hover {
    background: rgba(var(--primary-color), 0.2); /* Lighter hover for dark background */
}
.page-about__faq-qtext {
    flex: 1;
    font-size: 18px;
    font-weight: 600;
    line-height: 1.5;
    text-align: left;
    color: var(--text-main);
}
.page-about__faq-toggle {
    font-size: 28px;
    font-weight: bold;
    color: var(--gold-color);
    flex-shrink: 0;
    margin-left: 15px;
    width: 30px;
    text-align: center;
}
details.page-about__faq-item .page-about__faq-answer {
    padding: 0 25px 20px;
    background: rgba(var(--deep-navy), 0.8);
    border-top: 1px solid var(--divider-color);
    border-radius: 0 0 8px 8px;
    color: var(--text-secondary);
    font-size: 16px;
    line-height: 1.6;
}
.page-about__faq-answer p {
    margin-bottom: 10px;
}

/* Bottom CTA */
.page-about__cta-bottom {
    padding: 80px 0;
}
.page-about__cta-bottom .page-about__section-title {
    margin-bottom: 15px;
}
.page-about__cta-bottom .page-about__section-description {
    margin-bottom: 30px;
}

/* Responsive styles */
@media (max-width: 1024px) {
    .page-about__container {
        padding: 20px 30px;
    }
    .page-about__content-flex {
        flex-direction: column;
        text-align: center;
    }
    .page-about__content-flex--reverse {
        flex-direction: column; /* Keep consistent on smaller screens */
    }
    .page-about__text-block {
        padding: 0;
    }
    .page-about__image-block {
        margin-top: 30px;
    }
    .page-about__values-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
    .page-about__value-icon {
        width: 180px;
    }
}

@media (max-width: 768px) {
    /* HERO 主图区域 */
    .page-about__hero-section {
        padding-top: 10px; /* Small top padding, assuming body handles header offset */
    }
    .page-about__hero-image {
        object-fit: contain !important;
        aspect-ratio: unset !important;
        width: 100% !important;
        height: auto !important;
    }
    .page-about__hero-content-wrapper {
        padding: 30px 15px 40px;
        margin-top: -80px;
    }
    .page-about__main-title {
        font-size: clamp(30px, 8vw, 40px);
    }
    .page-about__hero-description {
        font-size: 16px;
    }
    .page-about__cta-buttons {
        flex-direction: column !important; /* Buttons stack vertically */
        gap: 15px;
        padding-left: 15px;
        padding-right: 15px;
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }
    .page-about__btn-primary,
    .page-about__btn-secondary {
        width: 100% !important;
        max-width: 100% !important;
        padding: 12px 20px;
        font-size: 16px;
        white-space: normal !important;
        word-wrap: break-word !important;
        box-sizing: border-box !important;
    }

    /* 通用图片与容器 */
    .page-about img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
        display: block !important;
    }
    .page-about__section,
    .page-about__container,
    .page-about__card,
    .page-about__text-block,
    .page-about__image-block {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px;
        padding-right: 15px;
    }
    .page-about__section {
        padding: 40px 0;
    }
    .page-about__section-title {
        font-size: clamp(24px, 6vw, 36px);
    }
    .page-about__section-description {
        font-size: 16px;
    }
    .page-about__text-block p {
        font-size: 16px;
    }

    /* Core Values Grid */
    .page-about__values-grid {
        grid-template-columns: 1fr; /* Single column */
        gap: 20px;
    }
    .page-about__value-card {
        padding: 20px;
    }
    .page-about__value-icon {
        width: 150px;
    }
    .page-about__value-title {
        font-size: 20px;
    }
    .page-about__value-description {
        font-size: 15px;
    }

    /* FAQ Section */
    details.page-about__faq-item summary.page-about__faq-question {
        padding: 15px;
    }
    .page-about__faq-qtext {
        font-size: 16px;
    }
    .page-about__faq-toggle {
        font-size: 24px;
        width: 24px;
    }
    details.page-about__faq-item .page-about__faq-answer {
        padding: 0 15px 15px;
        font-size: 15px;
    }
}