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

.page-about {
    font-family: 'Arial', sans-serif;
    color: var(--color-text-main); /* Light text for dark body background */
    background-color: var(--color-deep-navy); /* Ensure consistency */
    line-height: 1.6;
}

.page-about__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 15px;
    box-sizing: border-box;
}

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

.page-about__hero-image {
    width: 100%;
    height: auto;
    display: block;
    overflow: hidden;
}

.page-about__hero-image img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

.page-about__hero-content {
    max-width: 900px;
    margin: 40px auto;
    text-align: center;
    padding: 0 15px;
}

.page-about__main-title {
    font-size: clamp(2.5rem, 5vw, 3.5rem); /* Using clamp as per instructions */
    color: var(--color-gold);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
}

.page-about__intro-text {
    font-size: 1.15rem;
    color: var(--color-text-secondary);
    margin-bottom: 30px;
}

.page-about__cta-group {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap; /* Ensure responsiveness for buttons */
}

.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;
    cursor: pointer;
    max-width: 100%; /* Button responsiveness */
    box-sizing: border-box;
    white-space: normal;
    word-wrap: break-word;
    text-align: center;
}

.page-about__btn-primary {
    background: var(--color-button-gradient);
    color: var(--color-text-main);
    border: none;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.page-about__btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-2px);
}

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

.page-about__btn-secondary:hover {
    background-color: var(--color-gold);
    color: var(--color-deep-navy);
    transform: translateY(-2px);
}

.page-about__btn-primary--large {
    padding: 18px 40px;
    font-size: 1.2rem;
}

/* General Section Styling */
.page-about__section {
    padding: 60px 0;
    background-color: var(--color-deep-navy);
}

.page-about__section-title {
    font-size: 2.5rem;
    color: var(--color-gold);
    text-align: center;
    margin-bottom: 40px;
    font-weight: 700;
}

.page-about__content-grid {
    display: flex;
    gap: 40px;
    align-items: center;
    margin-bottom: 30px;
}

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

.page-about__text-block {
    flex: 1;
    font-size: 1.05rem;
    color: var(--color-text-secondary);
}

.page-about__text-block p {
    margin-bottom: 15px;
}

.page-about__image-block {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
}

.page-about__image-block img {
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: 10px;
}

.page-about__image-block--center {
    flex: none;
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
}

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

.page-about__value-card {
    background-color: var(--color-card-bg);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--color-border);
    text-align: center;
}

.page-about__value-title {
    font-size: 1.6rem;
    color: var(--color-gold);
    margin-bottom: 15px;
    font-weight: 600;
}

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

/* Feature List */
.page-about__feature-list {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.page-about__feature-item {
    background-color: var(--color-card-bg);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--color-border);
}

.page-about__feature-title {
    font-size: 1.5rem;
    color: var(--color-gold);
    margin-bottom: 10px;
    font-weight: 600;
}

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

/* CTA Section */
.page-about__section--cta {
    background: var(--color-primary); /* Use primary color as background */
    padding: 80px 0;
    text-align: center;
}

.page-about__container--cta {
    max-width: 900px;
}

.page-about__cta-title {
    font-size: 2.8rem;
    color: var(--color-gold);
    margin-bottom: 20px;
    font-weight: 700;
}

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

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .page-about__container {
        padding: 15px;
    }

    /* HERO 主图区域 */
    .page-about__hero-section {
        padding-top: 10px; /* Small top padding, not var(--header-offset) */
    }
    .page-about__hero-content {
        margin: 20px auto;
        padding: 0 15px;
    }
    .page-about__main-title {
        font-size: 2rem;
    }
    .page-about__intro-text {
        font-size: 1rem;
    }
    .page-about__cta-group {
        flex-direction: column;
        gap: 15px;
        padding: 0 15px;
    }
    .page-about__btn-primary,
    .page-about__btn-secondary {
        max-width: 100% !important;
        width: 100% !important;
        padding: 12px 20px;
        font-size: 1rem;
        box-sizing: border-box !important;
        white-space: normal !important;
        word-wrap: break-word !important;
    }
    .page-about__btn-primary--large {
        padding: 15px 30px;
        font-size: 1.1rem;
    }

    /* 长文区 */
    .page-about__section-title {
        font-size: 2rem;
        margin-bottom: 30px;
    }
    .page-about__content-grid {
        flex-direction: column;
        gap: 30px;
    }
    .page-about__content-grid--reverse {
        flex-direction: column; /* Stays column for mobile */
    }
    .page-about__text-block {
        font-size: 1rem;
    }

    /* 通用图片与容器 */
    .page-about img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
        display: block;
    }
    .page-about__section,
    .page-about__card,
    .page-about__container,
    .page-about__image-block,
    .page-about__value-card,
    .page-about__feature-item {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px;
        padding-right: 15px;
    }

    /* Values Grid */
    .page-about__values-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .page-about__value-card {
        padding: 20px;
    }
    .page-about__value-title {
        font-size: 1.4rem;
    }

    /* Feature List */
    .page-about__feature-list {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .page-about__feature-item {
        padding: 20px;
    }
    .page-about__feature-title {
        font-size: 1.3rem;
    }

    /* CTA Section */
    .page-about__section--cta {
        padding: 50px 0;
    }
    .page-about__cta-title {
        font-size: 2rem;
    }
    .page-about__cta-description {
        font-size: 1rem;
    }
    .page-about__container--cta {
        padding: 0 15px;
    }
}