.page-about {
    font-family: Arial, sans-serif;
    color: var(--text-main-color, #F2FFF6); /* Default text color for the page */
    background-color: var(--background-color-dark, #08160F);
}

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

/* Hero Section */
.page-about__hero-section {
    position: relative;
    padding-top: 10px; /* Small top padding, relying on body for header offset */
    margin-bottom: 40px;
    background-color: var(--background-color-dark, #08160F);
    overflow: hidden; /* Ensure no overflow */
}

.page-about__hero-image-wrapper {
    width: 100%;
    max-height: 500px; /* Limit height for hero image */
    overflow: hidden;
    margin-bottom: 30px;
}

.page-about__hero-image {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    border-radius: 10px;
    filter: none; /* Ensure no image filters */
}

.page-about__hero-content {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px 40px;
}

.page-about__main-title {
    font-size: clamp(2.5rem, 4vw, 3.5rem); /* Using clamp for responsive h1 */
    font-weight: 700;
    color: var(--text-main-color, #F2FFF6);
    line-height: 1.2;
    margin-bottom: 20px;
}

.page-about__intro-text {
    font-size: 1.1rem;
    line-height: 1.6;
    color: var(--text-secondary-color, #A7D9B8);
    margin-bottom: 30px;
}

.page-about__cta-button {
    display: inline-block;
    padding: 15px 30px;
    background: linear-gradient(180deg, #2AD16F 0%, #13994A 100%);
    color: #ffffff;
    font-size: 1.1rem;
    font-weight: 700;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    border: none;
    cursor: pointer;
    max-width: 100%; /* Base responsive for buttons */
    box-sizing: border-box;
    white-space: normal;
    word-wrap: break-word;
}

.page-about__cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* Section Titles */
.page-about__section-title {
    font-size: clamp(2rem, 3.5vw, 3rem);
    font-weight: 700;
    color: var(--text-main-color, #F2FFF6);
    text-align: center;
    margin-bottom: 40px;
    padding-top: 40px;
}

/* Mission & Vision Section */
.page-about__mission-vision-section {
    padding: 40px 0;
    background-color: var(--background-color-dark, #08160F);
}

.page-about__mission-vision-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-top: 30px;
}

.page-about__card {
    background-color: var(--card-bg-color, #11271B);
    border-radius: 10px;
    padding: 30px;
    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, #2E7A4E);
    color: var(--text-main-color, #F2FFF6); /* Ensure card text color */
}

.page-about__card:hover {
    transform: translateY(-5px);
}

.page-about__card-image {
    width: 100%;
    height: 250px; /* Fixed height for consistency */
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 20px;
    display: block;
    filter: none; /* Ensure no image filters */
}

.page-about__card-title {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--text-main-color, #F2FFF6);
    margin-bottom: 15px;
}

.page-about__card-text {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-secondary-color, #A7D9B8);
}

/* Values Section */
.page-about__values-section {
    padding: 40px 0;
    background-color: var(--background-color-dark, #08160F);
}

.page-about__values-list {
    list-style: none;
    padding: 0;
    margin-top: 30px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
}

.page-about__value-item {
    background-color: var(--card-bg-color, #11271B);
    border-radius: 10px;
    padding: 25px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color, #2E7A4E);
    color: var(--text-secondary-color, #A7D9B8); /* Ensure value item text color */
}

.page-about__value-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gold-color, #F2C14E); /* Using gold for value titles */
    margin-bottom: 10px;
}

.page-about__value-description {
    font-size: 0.95rem;
    line-height: 1.5;
    color: var(--text-secondary-color, #A7D9B8);
}

/* Why Choose Us Section */
.page-about__why-choose-us-section {
    padding: 40px 0 60px;
    background-color: var(--background-color-dark, #08160F);
}

.page-about__features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
    margin-top: 30px;
}

.page-about__feature-card {
    background-color: var(--card-bg-color, #11271B);
    border-radius: 10px;
    padding: 25px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    text-align: center;
    border: 1px solid var(--border-color, #2E7A4E);
    color: var(--text-secondary-color, #A7D9B8); /* Ensure feature card text color */
}

.page-about__feature-icon {
    width: 100%;
    height: 180px; /* Fixed height for feature icons */
    object-fit: cover;
    border-radius: 8px;
    margin: 0 auto 20px;
    display: block;
    filter: none; /* Ensure no image filters */
}

.page-about__feature-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-main-color, #F2FFF6);
    margin-bottom: 10px;
}

.page-about__feature-description {
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--text-secondary-color, #A7D9B8);
}

/* FAQ Section */
.page-about__faq-section {
    padding: 40px 0;
    background-color: var(--background-color-dark, #08160F);
}

.page-about__faq-list {
    max-width: 900px;
    margin: 30px auto 0;
}

details.page-about__faq-item {
    margin-bottom: 15px;
    border-radius: 10px;
    border: 1px solid var(--border-color, #2E7A4E);
    overflow: hidden;
    background: var(--card-bg-color, #11271B);
    box-shadow: 0 4px 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 20px;
    cursor: pointer;
    user-select: none;
    list-style: none;
    transition: background-color 0.3s ease;
    color: var(--text-main-color, #F2FFF6);
    font-size: 1.1rem;
    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: var(--deep-green-color, #0A4B2C); /* Slightly lighter dark green on hover */
}
.page-about__faq-qtext {
    flex: 1;
    font-size: 1.1rem;
    font-weight: 600;
    line-height: 1.5;
    text-align: left;
    color: var(--text-main-color, #F2FFF6);
}
.page-about__faq-toggle {
    font-size: 24px;
    font-weight: bold;
    color: var(--glow-color, #57E38D); /* Using glow color for toggle */
    flex-shrink: 0;
    margin-left: 15px;
    width: 28px;
    text-align: center;
}
details.page-about__faq-item .page-about__faq-answer {
    padding: 0 20px 20px;
    background: var(--background-color-dark, #08160F); /* Darker background for answer */
    border-radius: 0 0 10px 10px;
    color: var(--text-secondary-color, #A7D9B8);
    font-size: 1rem;
    line-height: 1.6;
}
details.page-about__faq-item .page-about__faq-answer p {
    margin: 0;
}


/* --- Responsive Styles (Mobile) --- */
@media (max-width: 768px) {
    /* 1. 首页轮播 (__hero-slider) - Placeholder */
    .page-about__hero-slider { /* Assuming this class might be present in a shared context */
        padding-top: 10px !important; /* Small top padding for mobile */
        overflow: hidden;
    }
    .page-about__hero-slider img {
        max-width: 100% !important;
        height: auto !important;
        display: block !important;
    }

    /* 2. 首页双列 CTA (__promo-duo / __promo-duo-grid) - Placeholder */
    .page-about__promo-duo-grid { /* Assuming this class might be present in a shared context */
        grid-template-columns: 1fr !important;
        gap: 20px !important;
        padding: 0 15px !important;
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
    }
    .page-about__promo-duo-grid a[class*="button"],
    .page-about__promo-duo-grid 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;
    }

    /* 3. 首页长文滚动框/博客滑块 (__home-content, __blog-slider) - Placeholder */
    .page-about__home-content { /* Assuming this class might be present in a shared context */
        padding: 0 15px !important;
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
    }
    .page-about__home-content-inner { /* Assuming this class might be present in a shared context */
        height: 60vh !important; /* Fixed height for scrollable content */
        overflow-y: auto !important;
        -webkit-overflow-scrolling: touch;
        padding-right: 10px; /* Space for scrollbar */
    }
    .page-about__blog-slider { /* Assuming this class might be present in a shared context */
        padding: 0 15px !important;
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
    }
    .page-about__post-cover { /* Assuming this class might be present in a shared context */
        aspect-ratio: 16 / 9 !important;
        object-fit: cover !important;
        width: 100% !important;
        height: auto !important;
        display: block !important;
    }
    .page-about table { /* For any tables */
        display: block !important;
        overflow-x: auto !important;
        white-space: nowrap !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }
    .page-about table th, .page-about table td {
        white-space: normal !important; /* Allow content inside cells to wrap */
    }

    /* 4. 通用图片与容器 (Applied to about.html content) */
    .page-about img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
        display: block !important;
    }
    .page-about__section,
    .page-about__card,
    .page-about__container,
    .page-about__hero-section,
    .page-about__mission-vision-section,
    .page-about__values-section,
    .page-about__why-choose-us-section,
    .page-about__faq-section {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px;
        padding-right: 15px;
    }

    /* 5. 按钮与按钮容器 (Applied to about.html content) */
    .page-about__cta-button,
    .page-about__btn-primary, /* Generic button classes */
    .page-about__btn-secondary,
    .page-about a[class*="button"],
    .page-about 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;
        font-size: 1rem;
    }
    .page-about__cta-buttons, /* Generic button containers */
    .page-about__button-group,
    .page-about__btn-container {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px;
        padding-right: 15px;
        flex-wrap: wrap !important;
        gap: 10px;
        display: flex;
        flex-direction: column; /* Stack buttons vertically by default on mobile */
    }
    .page-about__hero-content .page-about__cta-button {
        width: auto !important;
        max-width: 300px !important;
        margin: 0 auto;
    }

    /* 6. 内页 FAQ 等内容模块 (Applied to about.html content) */
    .page-about__hero-content {
        padding: 0 15px 30px !important;
    }
    .page-about__main-title {
        font-size: 2rem;
        margin-bottom: 15px;
    }
    .page-about__intro-text {
        font-size: 0.95rem;
        margin-bottom: 20px;
    }
    .page-about__section-title {
        font-size: 1.8rem;
        margin-bottom: 30px;
        padding-top: 30px;
    }

    .page-about__mission-vision-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .page-about__card {
        padding: 20px;
    }
    .page-about__card-image {
        height: 200px;
    }
    .page-about__card-title {
        font-size: 1.5rem;
    }
    .page-about__card-text {
        font-size: 0.9rem;
    }

    .page-about__values-list {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    .page-about__value-item {
        padding: 20px;
    }
    .page-about__value-title {
        font-size: 1.3rem;
    }
    .page-about__value-description {
        font-size: 0.9rem;
    }

    .page-about__features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .page-about__feature-card {
        padding: 20px;
    }
    .page-about__feature-icon {
        height: 150px;
    }
    .page-about__feature-title {
        font-size: 1.2rem;
    }
    .page-about__feature-description {
        font-size: 0.85rem;
    }

    details.page-about__faq-item summary.page-about__faq-question { padding: 15px; }
    .page-about__faq-qtext { font-size: 1rem; }
    details.page-about__faq-item .page-about__faq-answer {
        padding: 0 15px 15px;
        font-size: 0.9rem;
    }
    .page-about__faq-toggle {
        font-size: 20px;
        width: 24px;
        height: 24px;
    }
}

/* Color Contrast Enforcement */
/* Body background is dark (#08160F), so main text should be light (#F2FFF6) */
.page-about {
    color: var(--text-main-color, #F2FFF6);
}

.page-about__card,
.page-about__value-item,
.page-about__feature-card {
    background: var(--card-bg-color, #11271B);
    color: var(--text-main-color, #F2FFF6);
    border: 1px solid var(--border-color, #2E7A4E);
}

.page-about p,
.page-about li {
    color: var(--text-secondary-color, #A7D9B8);
}

.page-about__main-title,
.page-about__section-title,
.page-about__card-title,
.page-about__feature-title {
    color: var(--text-main-color, #F2FFF6);
}

.page-about__value-title {
    color: var(--gold-color, #F2C14E);
}

.page-about__cta-button {
    background: linear-gradient(180deg, #2AD16F 0%, #13994A 100%);
    color: #ffffff; /* White text on green gradient */
}

/* Ensure no image filters */
.page-about img {
    filter: none !important;
}