:root {
    --primary-color: #FF8C1A;
    --secondary-color: #FFA53A;
    --card-bg: #17191F;
    --site-bg: #0D0E12;
    --text-main: #FFF3E6;
    --border-color: #A84F0C;
    --glow-color: #FFB04D;
    --deep-orange: #D96800;
    --button-gradient: linear-gradient(180deg, #FFA53A 0%, #D96800 100%);
}

.page-about {
    color: var(--text-main); /* Assuming body background is dark, text is light */
    background-color: var(--site-bg);
    font-family: 'Arial', sans-serif;
}

.page-about__hero-section {
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 10px 0 60px; /* Rely on body padding-top for header offset, use small top padding */
    background: var(--site-bg);
    overflow: hidden;
}

.page-about__hero-image {
    position: relative;
    width: 100%;
    max-height: 700px;
    overflow: hidden;
}

.page-about__hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover; /* Cover for desktop */
    display: block;
    filter: brightness(0.6);
}

.page-about__hero-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    max-width: 900px;
    z-index: 10;
    padding: 20px;
    box-sizing: border-box;
}

.page-about__main-title {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 20px;
    line-height: 1.2;
    text-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
}

.page-about__hero-description {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: rgba(255, 243, 230, 0.9);
    margin-bottom: 30px;
    line-height: 1.6;
}

.page-about__cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    width: 100%; /* Ensure container takes full width */
    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: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    box-sizing: border-box;
    white-space: normal;
    word-wrap: break-word;
    max-width: 100%;
}

.page-about__btn-primary {
    background: var(--button-gradient);
    color: #ffffff;
    border: none;
    box-shadow: 0 4px 15px rgba(255, 140, 26, 0.4);
}

.page-about__btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(255, 140, 26, 0.6);
}

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

.page-about__btn-secondary:hover {
    background: var(--secondary-color);
    color: var(--site-bg);
}

.page-about__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
    box-sizing: border-box;
    width: 100%;
}

.page-about__section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 20px;
    line-height: 1.3;
}

.page-about__section-intro {
    font-size: clamp(1rem, 1.8vw, 1.15rem);
    color: var(--text-main);
    text-align: center;
    max-width: 800px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

/* Mission & Vision Section */
.page-about__mission-vision-section {
    background-color: var(--site-bg);
    padding: 60px 0;
}

.page-about__cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.page-about__card {
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
    text-align: left;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

.page-about__card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.5);
}

.page-about__card-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--secondary-color);
    margin-bottom: 15px;
    line-height: 1.4;
}

.page-about__card p {
    font-size: 1rem;
    line-height: 1.7;
    color: rgba(255, 243, 230, 0.8);
}

/* Why Choose Section */
.page-about__why-choose-section {
    background-color: var(--deep-orange);
    padding: 80px 0;
}

.page-about__why-choose-section .page-about__section-title {
    color: #ffffff;
}

.page-about__why-choose-section .page-about__section-intro {
    color: rgba(255, 255, 255, 0.9);
}

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

.page-about__feature-item {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease, background-color 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.page-about__feature-item:hover {
    transform: translateY(-8px);
    background-color: rgba(255, 255, 255, 0.15);
}

.page-about__feature-icon {
    width: 80px;
    height: 80px;
    object-fit: contain;
    margin-bottom: 20px;
    filter: drop-shadow(0 0 8px var(--glow-color));
}

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

.page-about__feature-item p {
    font-size: 0.95rem;
    line-height: 1.6;
    color: rgba(255, 243, 230, 0.85);
}

/* Team Section */
.page-about__team-section {
    background-color: var(--site-bg);
    padding: 60px 0;
}

.page-about__team-members-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.page-about__team-member-card {
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    color: var(--text-main);
}

.page-about__team-member-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 20px;
    border: 3px solid var(--secondary-color);
}

.page-about__team-member-name {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.page-about__team-member-role {
    font-size: 1rem;
    color: rgba(255, 243, 230, 0.7);
    margin-bottom: 15px;
}

.page-about__team-member-description {
    font-size: 0.95rem;
    line-height: 1.6;
    color: rgba(255, 243, 230, 0.85);
}

/* Security Section */
.page-about__security-section {
    background-color: var(--deep-orange);
    padding: 80px 0;
}

.page-about__security-section .page-about__section-title {
    color: #ffffff;
}

.page-about__security-section .page-about__section-intro {
    color: rgba(255, 255, 255, 0.9);
}

.page-about__security-features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.page-about__security-item {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text-main);
}

.page-about__security-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.page-about__security-item p {
    font-size: 0.95rem;
    line-height: 1.6;
    color: rgba(255, 243, 230, 0.85);
}

/* Social Responsibility Section */
.page-about__social-responsibility-section {
    background-color: var(--site-bg);
    padding: 60px 0;
}

.page-about__responsibility-items-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.page-about__responsibility-item {
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    color: var(--text-main);
}

.page-about__responsibility-title {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.page-about__responsibility-item p {
    font-size: 0.95rem;
    line-height: 1.6;
    color: rgba(255, 243, 230, 0.85);
}

/* Future & CTA Section */
.page-about__future-cta-section {
    background-color: var(--deep-orange);
    padding: 80px 0;
}

.page-about__future-cta-section .page-about__section-title {
    color: #ffffff;
}

.page-about__future-cta-section .page-about__section-intro {
    color: rgba(255, 255, 255, 0.9);
}

/* FAQ Section */
.page-about__faq-section {
    background-color: var(--site-bg);
    padding: 60px 0;
}

.page-about__faq-list {
    max-width: 900px;
    margin: 40px auto 0;
}

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 4px 15px 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;
}

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(255, 255, 255, 0.05);
}

.page-about__faq-qtext {
    flex: 1;
    font-size: 1.15rem;
    font-weight: 600;
    line-height: 1.5;
    text-align: left;
    color: var(--text-main);
}

.page-about__faq-toggle {
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--secondary-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: var(--card-bg);
    border-radius: 0 0 8px 8px;
    color: rgba(255, 243, 230, 0.85);
    font-size: 1rem;
    line-height: 1.7;
}

/* General Image Styling */
.page-about img {
    max-width: 100%;
    height: auto;
    display: block;
    box-sizing: border-box;
}

/* Responsive Styles */
@media (max-width: 1024px) {
    .page-about__hero-content {
        max-width: 700px;
    }
    .page-about__main-title {
        font-size: clamp(2rem, 4.5vw, 3rem);
    }
    .page-about__hero-description {
        font-size: clamp(0.95rem, 1.8vw, 1.1rem);
    }
    .page-about__btn-primary, .page-about__btn-secondary {
        padding: 12px 25px;
        font-size: 1rem;
    }
    .page-about__section-title {
        font-size: clamp(1.8rem, 3.5vw, 2.5rem);
    }
    .page-about__section-intro {
        font-size: clamp(0.9rem, 1.6vw, 1.05rem);
    }
    .page-about__card-title, .page-about__feature-title, .page-about__team-member-name, .page-about__security-title, .page-about__responsibility-title {
        font-size: 1.3rem;
    }
    .page-about__faq-qtext {
        font-size: 1.05rem;
    }
}

@media (max-width: 768px) {
    /* HERO 主图区域 */
    .page-about__hero-section {
        padding: 10px 0 40px;
    }
    .page-about__hero-image img {
        object-fit: contain !important; /* Mobile: contain, no cropping */
        height: auto !important;
        aspect-ratio: unset !important;
        filter: brightness(0.8);
    }
    .page-about__hero-content {
        position: static;
        transform: none;
        padding: 20px 15px;
        background: var(--site-bg);
        width: 100%;
    }
    .page-about__main-title {
        font-size: 2.2rem;
        margin-top: 0;
    }
    .page-about__hero-description {
        font-size: 1rem;
    }
    .page-about__cta-buttons {
        flex-direction: column;
        gap: 15px;
        padding: 0 15px;
    }
    .page-about__btn-primary, .page-about__btn-secondary {
        width: 100% !important;
        max-width: 100% !important;
        padding-left: 15px !important;
        padding-right: 15px !important;
        font-size: 1rem !important;
    }

    /* 通用图片与容器 */
    .page-about img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
    }
    .page-about__container,
    .page-about__card,
    .page-about__feature-item,
    .page-about__team-member-card,
    .page-about__security-item,
    .page-about__responsibility-item {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px;
        padding-right: 15px;
    }
    .page-about__container {
        padding: 30px 15px;
    }

    /* 装饰主标题 + 长文 SEO 区 */
    .page-about__section-title {
        font-size: 1.8rem;
        text-align: center;
        max-width: 100%;
        word-wrap: break-word;
    }
    .page-about__section-intro {
        font-size: 0.95rem;
        max-width: 100%;
        word-wrap: break-word;
    }

    /* 产品展示图区域 (Not applicable for this page, but general rule for other pages) */
    /* If this page had product grids: */
    /* .page-about__products-grid { grid-template-columns: repeat(2, 1fr); overflow-x: hidden; } */
    /* .page-about__products-grid .page-about__product-card:nth-child(n+5) { margin-top: 20px; } */

    .page-about__cards-grid,
    .page-about__features-grid,
    .page-about__team-members-grid,
    .page-about__security-features-grid,
    .page-about__responsibility-items-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .page-about__card, .page-about__feature-item, .page-about__team-member-card, .page-about__security-item, .page-about__responsibility-item {
        padding: 20px;
    }
    .page-about__card-title, .page-about__feature-title, .page-about__team-member-name, .page-about__security-title, .page-about__responsibility-title {
        font-size: 1.2rem;
    }
    .page-about__feature-icon {
        width: 60px;
        height: 60px;
    }

    /* FAQ */
    details.page-about__faq-item summary.page-about__faq-question {
        padding: 15px 20px;
    }
    .page-about__faq-qtext {
        font-size: 1rem;
    }
    .page-about__faq-toggle {
        font-size: 1.5rem;
        width: 25px;
    }
    details.page-about__faq-item .page-about__faq-answer {
        padding: 0 20px 15px;
    }
}