/* Biến màu sắc */
:root {
    --primary-color: #F2C14E;
    --secondary-color: #FFD36B;
    --card-bg: #111111;
    --bg-color: #0A0A0A;
    --text-main: #FFF6D6;
    --border-color: #3A2A12;
    --glow-color: #FFD36B;
    --button-gradient: linear-gradient(180deg, #FFD86A 0%, #DDA11D 100%);
}

/* Cấu trúc chung */
.page-about {
    font-family: 'Arial', sans-serif;
    color: var(--text-main); /* Mặc định chữ sáng trên nền tối */
    background-color: var(--bg-color);
    line-height: 1.6;
}

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

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

.page-about__section-title {
    font-size: 38px;
    font-weight: bold;
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 40px;
    line-height: 1.2;
}

.page-about__section-title--light {
    color: var(--text-main);
}

.page-about__dark-section {
    background-color: var(--card-bg);
}

.page-about__text-block {
    max-width: 900px;
    margin: 0 auto 30px auto;
    font-size: 17px;
    text-align: justify;
    color: var(--text-main);
}

.page-about__text-block--light {
    color: var(--text-main);
}

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

.page-about__text-block ul {
    list-style: disc inside;
    margin-left: 20px;
    margin-top: 15px;
}

.page-about__text-block li {
    margin-bottom: 8px;
}

/* Nút CTA */
.page-about__cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 40px;
    flex-wrap: wrap;
    width: 100%;
    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: 14px 30px;
    border-radius: 8px;
    font-size: 18px;
    font-weight: bold;
    text-decoration: none;
    transition: all 0.3s ease;
    white-space: normal;
    word-wrap: break-word;
    max-width: 100%;
    box-sizing: border-box;
}

.page-about__btn-primary {
    background: var(--button-gradient);
    color: #000000; /* Đảm bảo tương phản trên nền gradient vàng */
    border: none;
    box-shadow: 0 4px 15px rgba(242, 193, 78, 0.4);
}

.page-about__btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(242, 193, 78, 0.6);
}

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

.page-about__btn-secondary:hover {
    background: rgba(242, 193, 78, 0.1);
    transform: translateY(-2px);
}

/* Hero Section */
.page-about__hero-section {
    position: relative;
    width: 100%;
    padding-top: 10px; /* Nhỏ hơn var(--header-offset) */
    background-color: var(--bg-color);
    text-align: center;
}

.page-about__hero-image-wrapper {
    width: 100%;
    overflow: hidden;
}

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

.page-about__hero-content {
    padding: 40px 20px 60px;
    max-width: 900px;
    margin: 0 auto;
}

.page-about__main-title {
    font-size: clamp(32px, 5vw, 48px);
    color: var(--primary-color);
    margin-bottom: 20px;
    line-height: 1.2;
    font-weight: bold;
}

.page-about__intro-description {
    font-size: 19px;
    color: var(--text-main);
    margin-bottom: 30px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

/* Card Styles */
.page-about__card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    color: var(--text-main);
    height: 100%;
    box-sizing: border-box;
}

.page-about__card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.page-about__card-title {
    font-size: 24px;
    font-weight: bold;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.page-about__card p {
    font-size: 16px;
    line-height: 1.7;
}

.page-about__card ul {
    list-style: disc inside;
    margin-left: 20px;
    margin-top: 10px;
}

.page-about__card li {
    margin-bottom: 5px;
}

/* Mission & Vision Section */
.page-about__content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

/* History Section */
.page-about__history-image,
.page-about__responsibility-image,
.page-about__team-image {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 30px auto 0 auto;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

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

.page-about__value-item .page-about__card-title {
    color: var(--primary-color);
}

/* Why Choose Section */
.page-about__advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.page-about__advantage-item .page-about__card-title {
    color: var(--secondary-color);
}

.page-about__feature-image {
    max-width: 100%;
    height: auto;
    display: block;
    margin-top: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

/* FAQ Section */
details.page-about__faq-item {
  margin-bottom: 15px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  overflow: hidden;
  background: var(--card-bg);
  color: var(--text-main);
}
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;
  font-size: 18px;
  font-weight: bold;
  color: var(--secondary-color);
}
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(242, 193, 78, 0.05);
}
.page-about__faq-qtext {
  flex: 1;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
  text-align: left;
  color: var(--text-main);
}
details.page-about__faq-item summary.page-about__faq-question:hover .page-about__faq-qtext {
    color: var(--primary-color);
}
.page-about__faq-toggle {
  font-size: 28px;
  font-weight: bold;
  color: var(--primary-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(--bg-color);
  border-radius: 0 0 10px 10px;
  color: var(--text-main);
}
details.page-about__faq-item .page-about__faq-answer p {
    font-size: 16px;
}

/* Contact Section - CTA buttons are defined above */

/* Responsive Design */
@media (max-width: 1024px) {
    .page-about__section-title {
        font-size: 32px;
    }
    .page-about__main-title {
        font-size: clamp(28px, 4.5vw, 42px);
    }
    .page-about__intro-description {
        font-size: 17px;
    }
    .page-about__btn-primary, .page-about__btn-secondary {
        padding: 12px 25px;
        font-size: 16px;
    }
    .page-about__card-title {
        font-size: 22px;
    }
    .page-about__faq-item summary.page-about__faq-question {
        font-size: 17px;
    }
    .page-about__faq-qtext {
        font-size: 17px;
    }
}

@media (max-width: 768px) {
    .page-about__section-padding {
        padding: 40px 0;
    }
    .page-about__section-title {
        font-size: 28px;
        margin-bottom: 30px;
    }
    .page-about__main-title {
        font-size: clamp(26px, 7vw, 36px);
    }
    .page-about__intro-description {
        font-size: 16px;
    }
    .page-about__text-block {
        font-size: 15px;
        margin-bottom: 20px;
        text-align: left;
    }

    /* HERO 主图区域 */
    .page-about__hero-section {
        padding-top: 10px;
    }
    .page-about__hero-image-wrapper {
        padding: 0;
    }
    .page-about__hero-image {
        object-fit: contain !important; /* 禁止 cover 裁切两侧 */
        aspect-ratio: unset !important; /* 取消固定宽高比 */
        width: 100% !important;
        height: auto !important;
    }
    .page-about__hero-content {
        padding: 30px 15px 40px;
    }

    /* 通用图片与容器 */
    .page-about img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
        box-sizing: border-box !important;
    }
    .page-about__container,
    .page-about__card,
    .page-about__text-block {
        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; /* 移动端垂直排列 */
        gap: 15px;
        padding-left: 15px;
        padding-right: 15px;
    }
    .page-about__btn-primary,
    .page-about__btn-secondary {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        white-space: normal !important;
        word-wrap: break-word !important;
        padding: 12px 20px;
        font-size: 16px;
    }

    /* Card Styles */
    .page-about__card {
        padding: 25px 20px;
    }
    .page-about__card-title {
        font-size: 20px;
    }
    .page-about__card p {
        font-size: 15px;
    }

    /* Grid layouts */
    .page-about__content-grid,
    .page-about__values-grid,
    .page-about__advantages-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    /* FAQ Section */
details.page-about__faq-item summary.page-about__faq-question {
  padding: 15px 20px;
}
.page-about__faq-qtext {
  font-size: 16px;
}
.page-about__faq-toggle {
  font-size: 24px;
  width: 25px;
}
details.page-about__faq-item .page-about__faq-answer {
  padding: 0 20px 15px;
}
.page-about__faq-answer p {
    font-size: 15px;
}

    /* Decorational Title + Long Text SEO Area (general text blocks) */
    .page-about__section-title-wrap, /* assuming this class might exist for titles */
    .page-about__article-body, /* general article body if it exists */
    .page-about__article-figure { /* general figures if they exist */
        text-align: left; /* default to left for better readability on mobile */
        margin-left: auto;
        margin-right: auto;
        max-width: 100%;
        box-sizing: border-box;
    }
    .page-about__section-title {
        text-align: center;
    }
}

@media (max-width: 480px) {
    .page-about__section-title {
        font-size: 24px;
    }
    .page-about__main-title {
        font-size: clamp(24px, 8vw, 32px);
    }
    .page-about__intro-description {
        font-size: 15px;
    }
    .page-about__btn-primary,
    .page-about__btn-secondary {
        padding: 10px 15px;
        font-size: 15px;
    }
    .page-about__card-title {
        font-size: 18px;
    }
    .page-about__card p {
        font-size: 14px;
    }
    .page-about__faq-qtext {
        font-size: 15px;
    }
}