.page-about {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: #F3F8FF; /* Text Main */
    background-color: var(--deep-navy); /* Body background from shared.css */
}

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

.page-about__hero-section {
    position: relative;
    width: 100%;
    padding-top: 10px; /* Small top padding to avoid double spacing with shared body padding */
    padding-bottom: 0;
    padding-left: 0;
    padding-right: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
    box-sizing: border-box;
}

.page-about__hero-image {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    margin-bottom: 20px;
}

.page-about__hero-content {
    position: relative;
    z-index: 1;
    padding: 0 20px 40px;
    max-width: 900px;
    box-sizing: border-box;
}

.page-about__main-title {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    color: #F3F8FF; /* Text Main */
    margin-bottom: 15px;
    line-height: 1.2;
    font-weight: bold;
}

.page-about__hero-description {
    font-size: 1.15rem;
    color: #AFC4E8; /* Text Secondary */
    margin-bottom: 30px;
}

.page-about__cta-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
    width: 100%;
}

.page-about__btn-primary,
.page-about__btn-secondary {
    display: inline-block;
    padding: 14px 30px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
    font-size: 1.05rem;
    transition: all 0.3s ease;
    max-width: 100%;
    box-sizing: border-box;
    white-space: normal;
    word-wrap: break-word;
    text-align: center;
}

.page-about__btn-primary {
    background: linear-gradient(180deg, #2B73F6 0%, #1144A6 100%);
    color: #F3F8FF; /* Text Main */
    border: none;
}

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

.page-about__btn-secondary {
    background: transparent;
    color: #F3F8FF; /* Text Main */
    border: 2px solid #2B73F6;
}

.page-about__btn-secondary:hover {
    background: #2B73F6;
    color: #F3F8FF;
    transform: translateY(-2px);
}

.page-about__section-title {
    font-size: 2.5rem;
    color: #F3F8FF; /* Text Main */
    text-align: center;
    margin-bottom: 40px;
    font-weight: bold;
}

.page-about__text-block {
    font-size: 1.1rem;
    color: #AFC4E8; /* Text Secondary */
    margin-bottom: 20px;
    text-align: justify;
}

.page-about__text-block a {
    color: #4FA8FF; /* Glow */
    text-decoration: none;
}

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

.page-about__introduction-section,
.page-about__why-choose-us-section,
.page-about__security-section,
.page-about__faq-section {
    padding: 60px 0;
    background-color: var(--deep-navy);
}

.page-about__values-section,
.page-about__games-overview-section,
.page-about__support-section,
.page-about__cta-bottom-section {
    padding: 60px 0;
    background-color: #10233F; /* Card B G */
}

.page-about__dark-section .page-about__section-title,
.page-about__dark-section .page-about__text-block,
.page-about__dark-section .page-about__value-title,
.page-about__dark-section .page-about__value-description,
.page-about__dark-section .page-about__game-title a,
.page-about__dark-section .page-about__game-description {
    color: #F3F8FF; /* Text Main */
}

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

.page-about__value-item {
    background-color: #1B3357; /* Divider - slightly lighter for contrast */
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.page-about__value-title {
    font-size: 1.6rem;
    color: #F2C14E; /* Gold */
    margin-bottom: 15px;
    font-weight: bold;
}

.page-about__value-description {
    font-size: 1rem;
    color: #AFC4E8; /* Text Secondary */
}

.page-about__values-image {
    width: 100%;
    height: auto;
    display: block;
    margin-top: 40px;
    border-radius: 10px;
    object-fit: cover;
}

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

.page-about__feature-item {
    background-color: #10233F; /* Card B G */
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    border: 1px solid #244D84; /* Border */
}

.page-about__feature-title {
    font-size: 1.5rem;
    color: #F3F8FF; /* Text Main */
    margin-bottom: 10px;
    font-weight: bold;
}

.page-about__feature-description {
    font-size: 1rem;
    color: #AFC4E8; /* Text Secondary */
}

.page-about__why-choose-image {
    width: 100%;
    height: auto;
    display: block;
    margin-top: 40px;
    border-radius: 10px;
    object-fit: cover;
}

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

.page-about__game-card {
    background-color: #1B3357; /* Divider - slightly lighter for contrast */
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    text-align: center;
    padding-bottom: 20px;
}

.page-about__game-image {
    width: 100%;
    height: 200px; /* Fixed height for consistency */
    object-fit: cover;
    margin-bottom: 15px;
}

.page-about__game-title {
    font-size: 1.4rem;
    margin-bottom: 10px;
    font-weight: bold;
    padding: 0 15px;
}

.page-about__game-title a {
    color: #F2C14E; /* Gold */
    text-decoration: none;
}

.page-about__game-title a:hover {
    text-decoration: underline;
}

.page-about__game-description {
    font-size: 0.95rem;
    color: #AFC4E8; /* Text Secondary */
    margin-bottom: 20px;
    padding: 0 15px;
}

.page-about__btn-link {
    display: inline-block;
    padding: 10px 20px;
    background: linear-gradient(180deg, #2B73F6 0%, #1144A6 100%);
    color: #F3F8FF;
    border-radius: 5px;
    text-decoration: none;
    font-weight: bold;
    font-size: 0.9rem;
    transition: background-color 0.3s ease;
}

.page-about__btn-link:hover {
    opacity: 0.9;
}

.page-about__security-image {
    width: 100%;
    height: auto;
    display: block;
    margin-top: 40px;
    border-radius: 10px;
    object-fit: cover;
}

.page-about__faq-list {
    margin-top: 40px;
}

.page-about__faq-item {
    background-color: #10233F; /* Card B G */
    border: 1px solid #244D84; /* Border */
    border-radius: 8px;
    margin-bottom: 15px;
    overflow: hidden;
}

.page-about__faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    font-size: 1.2rem;
    color: #F3F8FF; /* Text Main */
    font-weight: bold;
    cursor: pointer;
    background-color: #113B7A; /* Primary color for summary */
    border-bottom: 1px solid #244D84; /* Border */
}

.page-about__faq-item[open] .page-about__faq-question {
    border-bottom: 1px solid #244D84;
}

.page-about__faq-qtext {
    flex-grow: 1;
    -webkit-touch-callout: none; /* iOS Safari */
    -webkit-user-select: none;   /* Safari */
    -khtml-user-select: none;    /* Konqueror HTML */
    -moz-user-select: none;      /* Old versions of Firefox */
    -ms-user-select: none;       /* Internet Explorer/Edge */
    user-select: none;
}

.page-about__faq-toggle {
    font-size: 1.8rem;
    line-height: 1;
    margin-left: 15px;
    transition: transform 0.3s ease;
}

.page-about__faq-item[open] .page-about__faq-toggle {
    transform: rotate(45deg);
}

.page-about__faq-answer {
    padding: 20px;
    font-size: 1rem;
    color: #AFC4E8; /* Text Secondary */
    background-color: #10233F; /* Card B G */
    animation: fadein 0.3s ease-out;
}

@keyframes fadein {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Hide default details marker */
details > summary::-webkit-details-marker {
    display: none;
}
details > summary {
    list-style: none;
}

.page-about__cta-bottom-section {
    text-align: center;
}

.page-about__cta-bottom-section .page-about__text-block {
    margin-bottom: 30px;
    font-size: 1.2rem;
}

.page-about__cta-bottom-section .page-about__cta-buttons {
    margin-top: 20px;
}

/* --- Responsive Styles --- */
@media (max-width: 1024px) {
    .page-about__container {
        padding: 20px;
    }

    .page-about__main-title {
        font-size: clamp(2rem, 4.5vw, 3rem);
    }

    .page-about__hero-description {
        font-size: 1.05rem;
    }

    .page-about__section-title {
        font-size: 2rem;
    }

    .page-about__text-block {
        font-size: 1rem;
    }

    .page-about__values-grid,
    .page-about__features-grid,
    .page-about__games-grid {
        gap: 20px;
    }

    .page-about__value-title {
        font-size: 1.4rem;
    }

    .page-about__feature-title {
        font-size: 1.3rem;
    }

    .page-about__game-title {
        font-size: 1.2rem;
    }

    .page-about__game-image {
        height: 180px;
    }

    .page-about__faq-question {
        font-size: 1.1rem;
        padding: 18px;
    }

    .page-about__faq-answer {
        font-size: 0.95rem;
        padding: 18px;
    }
}

@media (max-width: 768px) {
    /* HERO 主图区域 */
    .page-about__hero-section {
        padding-top: 10px !important;
        padding-bottom: 20px !important;
    }

    .page-about__hero-content {
        padding: 0 15px 30px !important;
    }

    .page-about__main-title {
        font-size: clamp(1.8rem, 8vw, 2.5rem) !important;
        margin-bottom: 10px !important;
    }

    .page-about__hero-description {
        font-size: 1rem !important;
        margin-bottom: 20px !important;
    }

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

    /* 按钮与按钮容器 */
    .page-about__cta-buttons {
        flex-direction: column !important; /* Force vertical stacking for buttons */
        gap: 10px !important;
        padding: 0 15px !important;
    }

    .page-about__btn-primary,
    .page-about__btn-secondary,
    .page-about__btn-link {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        white-space: normal !important;
        word-wrap: break-word !important;
        padding: 12px 15px !important;
        font-size: 1rem !important;
    }

    /* 其他内容模块 */
    .page-about__introduction-section,
    .page-about__values-section,
    .page-about__why-choose-us-section,
    .page-about__games-overview-section,
    .page-about__security-section,
    .page-about__support-section,
    .page-about__faq-section,
    .page-about__cta-bottom-section {
        padding: 40px 0 !important;
    }

    .page-about__section-title {
        font-size: 1.8rem !important;
        margin-bottom: 30px !important;
    }

    .page-about__text-block {
        font-size: 0.95rem !important;
        padding: 0 15px !important; /* Add padding to text blocks */
    }

    .page-about__values-grid,
    .page-about__features-grid,
    .page-about__games-grid {
        grid-template-columns: 1fr !important;
        gap: 25px !important;
        padding: 0 15px !important;
    }

    .page-about__game-image {
        height: 160px !important; /* Adjust height for mobile */
    }

    .page-about__faq-question {
        font-size: 1rem !important;
        padding: 15px !important;
    }

    .page-about__faq-answer {
        font-size: 0.9rem !important;
        padding: 15px !important;
    }

    .page-about__value-item,
    .page-about__feature-item,
    .page-about__game-card {
        padding: 25px !important;
    }

    .page-about__cta-bottom-section .page-about__text-block {
        font-size: 1rem !important;
        padding: 0 15px !important;
    }
}