/* style/about.css */
/* 页面完整样式代码 - 注意：所有选择器必须添加页面前缀 */

:root {
    --page-about-primary-color: #CC0000; /* Deep Red */
    --page-about-secondary-color: #FFD700; /* Gold */
    --page-about-dark-text-color: #1a1a1a; /* Very dark grey for text on light backgrounds */
    --page-about-light-text-color: #FFFFFF; /* White for text on dark backgrounds */
    --page-about-background-light: #f8f8f8; /* Light background for sections */
    --page-about-background-dark: #222222; /* Dark background for CTA/Hero overlay */
    --page-about-border-color: #e0e0e0;
}

.page-about {
    font-family: 'Arial', sans-serif; /* Or a more suitable font for Vietnamese */
    color: var(--page-about-dark-text-color);
    line-height: 1.6;
    background-color: var(--page-about-background-light);
}

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

.page-about__hero {
    background: linear-gradient(135deg, var(--page-about-primary-color) 0%, #a00000 50%, var(--page-about-secondary-color) 100%);
    padding: 100px 0;
    text-align: center;
    color: var(--page-about-light-text-color);
    position: relative;
    overflow: hidden;
}

.page-about__hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('[GALLERY:bg:abstract,geometric,luxury,red_gold]') no-repeat center center/cover; /* Background pattern */
    opacity: 0.1;
    z-index: 1;
}

.page-about__hero .page-about__container {
    position: relative;
    z-index: 2;
}

.page-about__title {
    font-size: 3.5em;
    margin-bottom: 20px;
    font-weight: bold;
    color: var(--page-about-light-text-color);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.page-about__subtitle {
    font-size: 1.5em;
    max-width: 800px;
    margin: 0 auto;
    color: rgba(255, 255, 255, 0.9);
}

.page-about__section {
    padding: 80px 0;
    background-color: var(--page-about-background-light);
}

.page-about__section:nth-of-type(even) {
    background-color: #f0f0f0; /* Slightly different background for alternating sections */
}

.page-about__heading {
    font-size: 2.5em;
    color: var(--page-about-primary-color);
    text-align: center;
    margin-bottom: 60px;
    position: relative;
    padding-bottom: 15px;
}

.page-about__heading::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 0;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background-color: var(--page-about-secondary-color);
    border-radius: 2px;
}

.page-about__grid {
    display: grid;
    gap: 40px;
    align-items: center;
}

.page-about__grid--2-col {
    grid-template-columns: 1fr 1fr;
}

.page-about__grid--3-col {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.page-about__content-block p, .page-about__card p, .page-about__value-item p {
    margin-bottom: 15px;
    color: var(--page-about-dark-text-color);
}

.page-about__image-block {
    text-align: center;
}

.page-about__image {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.page-about__image--large {
    margin-top: 40px;
    width: 100%;
    max-height: 400px;
    object-fit: cover;
}

.page-about__btn {
    display: inline-block;
    padding: 15px 30px;
    border-radius: 5px;
    font-weight: bold;
    text-decoration: none;
    transition: all 0.3s ease;
    text-align: center;
    cursor: pointer;
    border: none;
    font-size: 1.1em;
}

.page-about__btn--primary {
    background-color: var(--page-about-primary-color);
    color: var(--page-about-light-text-color);
}

.page-about__btn--primary:hover {
    background-color: #a00000; /* Darker red */
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.page-about__btn--secondary {
    background-color: var(--page-about-secondary-color);
    color: var(--page-about-dark-text-color); /* Ensure contrast */
    margin-left: 20px;
}

.page-about__btn--secondary:hover {
    background-color: #e6b800; /* Darker gold */
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.page-about__btn--large {
    font-size: 1.2em;
    padding: 18px 35px;
}

.page-about__card {
    background-color: var(--page-about-light-text-color);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
}

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

.page-about__card-title {
    font-size: 1.8em;
    color: var(--page-about-primary-color);
    margin-bottom: 15px;
    font-weight: bold;
}

.page-about__value-item {
    background-color: var(--page-about-light-text-color);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    text-align: center;
    transition: transform 0.3s ease;
    height: 100%;
}

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

.page-about__icon {
    width: 80px;
    height: 80px;
    margin-bottom: 20px;
    object-fit: contain;
}

.page-about__value-title {
    font-size: 1.5em;
    color: var(--page-about-primary-color);
    margin-bottom: 10px;
    font-weight: bold;
}

.page-about__cta {
    background: linear-gradient(90deg, var(--page-about-primary-color) 0%, #a00000 100%);
    color: var(--page-about-light-text-color);
    text-align: center;
    padding: 80px 0;
}

.page-about__cta-content {
    max-width: 900px;
}

.page-about__heading--cta {
    color: var(--page-about-light-text-color);
    margin-bottom: 20px;
}

.page-about__heading--cta::after {
    background-color: var(--page-about-secondary-color);
}

.page-about__cta-text {
    font-size: 1.3em;
    margin-bottom: 40px;
    line-height: 1.5;
    color: rgba(255, 255, 255, 0.9);
}

.page-about__cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.page-about__cta-small-text {
    font-size: 0.9em;
    opacity: 0.8;
}

.page-about__faq {
    padding: 80px 0;
}

.page-about__accordion {
    max-width: 900px;
    margin: 0 auto;
    border: 1px solid var(--page-about-border-color);
    border-radius: 8px;
    overflow: hidden;
}

.page-about__accordion-item {
    border-bottom: 1px solid var(--page-about-border-color);
}

.page-about__accordion-item:last-child {
    border-bottom: none;
}

.page-about__accordion-header {
    background-color: var(--page-about-light-text-color);
    color: var(--page-about-primary-color);
    padding: 20px 30px;
    width: 100%;
    text-align: left;
    border: none;
    font-size: 1.2em;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s ease;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.page-about__accordion-header:hover, .page-about__accordion-header.active {
    background-color: #f5f5f5;
    color: #a00000;
}

.page-about__accordion-header::after {
    content: '+';
    font-size: 1.5em;
    line-height: 1;
    transition: transform 0.3s ease;
}

.page-about__accordion-header.active::after {
    content: '-';
    transform: rotate(180deg);
}

.page-about__accordion-content {
    padding: 0 30px;
    background-color: #fcfcfc;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-out, padding 0.4s ease-out;
    color: var(--page-about-dark-text-color);
}

.page-about__accordion-content.active {
    max-height: 300px; /* Adjust as needed, will be overridden by JS for scrollHeight */
    padding: 20px 30px;
}

.page-about__accordion-content p {
    margin-bottom: 10px;
}

.page-about__link-text {
    color: var(--page-about-primary-color);
    text-decoration: underline;
}

.page-about__link-text:hover {
    color: #a00000;
    text-decoration: none;
}

.page-about__contact {
    background-color: var(--page-about-background-dark);
    color: var(--page-about-light-text-color);
    text-align: center;
    padding: 80px 0;
}

.page-about__heading--contact {
    color: var(--page-about-light-text-color);
    margin-bottom: 20px;
}

.page-about__heading--contact::after {
    background-color: var(--page-about-secondary-color);
}

.page-about__contact-text {
    font-size: 1.2em;
    margin-bottom: 40px;
    color: rgba(255, 255, 255, 0.9);
}

/* Hidden section for scroll animation */
.page-about .hidden-section {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.page-about .fade-in {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive Design */
@media (max-width: 992px) {
    .page-about__grid--2-col {
        grid-template-columns: 1fr;
    }

    .page-about__image-block {
        order: -1; /* Image appears above text on smaller screens */
        margin-bottom: 40px;
    }

    .page-about__hero {
        padding: 80px 0;
    }

    .page-about__title {
        font-size: 2.8em;
    }

    .page-about__subtitle {
        font-size: 1.2em;
    }

    .page-about__heading {
        font-size: 2em;
        margin-bottom: 40px;
    }

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

    .page-about__btn--secondary {
        margin-left: 0;
        margin-top: 15px;
    }

    .page-about__cta-buttons {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 768px) {
    .page-about__grid--3-col {
        grid-template-columns: 1fr;
    }

    .page-about__title {
        font-size: 2.2em;
    }

    .page-about__subtitle {
        font-size: 1em;
    }

    .page-about__heading {
        font-size: 1.8em;
    }

    .page-about__btn {
        width: 100%;
    }

    .page-about__accordion-header {
        font-size: 1.1em;
        padding: 15px 20px;
    }

    .page-about__accordion-content.active {
        padding: 15px 20px;
    }
}