/* 关于我们部分样式 */
.about-section {
    position: relative;
    padding: 120px 0;
    overflow: hidden;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background-color: transparent;
}

/* 背景图容器 */
.about-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.about-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 1;
    transition: transform 0.5s ease-out;
}

.about-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
    position: relative;
    z-index: 1;
}

.about-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 60px;
    position: relative;
}

.about-title {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    position: relative;
}

.about-title h2 {
    font-size: 42px;
    color: #120101;
    margin-bottom: 5px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    position: relative;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.about-title h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 60px;
    height: 3px;
    background-color: var(--primary-color);
    border-radius: 3px;
}

.about-title .about-subtitle {
    font-size: 64px;
    color: rgba(255, 255, 255, 0.1);
    font-weight: 800;
    line-height: 1;
    margin-top: 10px;
    letter-spacing: -0.03em;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.about-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.3);
    color: #6c757d;
    text-decoration: none;
    font-size: 24px;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.about-link:hover {
    background-color: rgba(255, 255, 255, 0.5);
}

.company-card {
    background-color: rgba(52, 73, 94, 0.85);
    color: white;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    max-width: 700px;
    margin: 0 auto;
}

.company-card h3 {
    font-size: 24px;
    margin-bottom: 20px;
    font-weight: 500;
}

.company-card p {
    margin-bottom: 15px;
    line-height: 1.6;
    font-size: 16px;
}

.read-more {
    display: flex;
    justify-content: flex-end;
    margin-top: 20px;
}

.read-more a {
    color: #fff;
    text-decoration: none;
    display: flex;
    align-items: center;
    font-size: 14px;
    transition: all 0.3s ease;
}

.read-more a:hover {
    opacity: 0.8;
}

.read-more a::after {
    content: "+";
    margin-left: 5px;
    font-size: 18px;
}

/* 关于瑞芯页面样式 */

/* 顶部标题区域 */
.about-banner {
    background-color: #003366;
    background-image: linear-gradient(rgba(0, 51, 102, 0.9), rgba(0, 51, 102, 0.9)), url('../images/about-banner.jpg');
    background-size: cover;
    background-position: center;
    color: #fff;
    text-align: center;
    padding: 80px 0;
    position: relative;
}

.about-banner h1 {
    font-size: 36px;
    font-weight: 500;
    margin-bottom: 10px;
}

.about-subtitle {
    font-size: 48px;
    font-weight: 300;
    opacity: 0.5;
    letter-spacing: 2px;
}

/* 关于瑞芯内容区域 */
.about-content {
    padding: var(--spacing-xxl) 0;
    background: var(--bg-blue-50);
    min-height: 100vh;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 关于瑞芯导航 */
.about-nav {
    display: flex;
    margin-bottom: 40px;
    border-bottom: 1px solid #dee2e6;
    overflow-x: auto;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    /* Firefox */
}

.about-nav::-webkit-scrollbar {
    display: none;
    /* Chrome, Safari, Edge */
}

.nav-item {
    padding: 15px 30px;
    font-size: 18px;
    font-weight: 500;
    color: #333;
    cursor: pointer;
    position: relative;
    transition: all 0.3s ease;
}

.nav-item.active {
    color: #0056b3;
}

.nav-item.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: #0056b3;
}

/* 公共标题样式 */
.section-title {
    font-size: 28px;
    font-weight: 500;
    color: #333;
    margin-bottom: 30px;
    position: relative;
    padding-bottom: 15px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 2px;
    background-color: #0056b3;
}

/* 页面标题 */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xxl);
}

.section-header h1 {
    font-size: 2.5rem;
    color: var(--neutral-800);
    margin-bottom: var(--spacing-xs);
}

.section-subtitle {
    font-size: 1rem;
    color: var(--neutral-500);
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* 标签导航 */
.about-tabs {
    display: flex;
    justify-content: flex-start;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition-normal);
}

.about-tabs:hover {
    background: rgba(255, 255, 255, 0.9);
    box-shadow: var(--shadow-md);
}

.tab-item {
    padding: var(--spacing-sm) var(--spacing-lg);
    color: var(--neutral-700);
    font-size: 16px;
    cursor: pointer;
    position: relative;
    transition: var(--transition-normal);
    background: rgba(66, 133, 244, 0.1);
    border-radius: var(--radius-md);
    border: 1px solid rgba(66, 133, 244, 0.2);
}

.tab-item:hover,
.tab-item.active {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* 内容区域 */
.about-sections>div {
    display: none;
}

.about-sections>div.active {
    display: block;
}

/* 公司简介卡片 */
.intro-card,
.culture-card,
.history-card {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: var(--transition-normal);
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
    margin-bottom: var(--spacing-xl);
}

.intro-card:hover,
.culture-card:hover,
.history-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    background: rgba(255, 255, 255, 0.9);
}

.intro-card h2,
.culture-card h2,
.history-card h2 {
    font-size: 28px;
    color: var(--neutral-800);
    margin-bottom: var(--spacing-lg);
    position: relative;
    padding-bottom: var(--spacing-sm);
}

.intro-card h2::after,
.culture-card h2::after,
.history-card h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 2px;
    background-color: var(--primary-color);
}

.intro-content p,
.culture-content p {
    color: var(--neutral-600);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
    font-size: 15px;
}

/* 企业文化 */
.culture-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.culture-item {
    background: rgba(255, 255, 255, 0.7);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    text-align: center;
    transition: var(--transition-normal);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.culture-item:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.9);
    box-shadow: var(--shadow-md);
}

/* 发展历程 */
.history-timeline {
    position: relative;
    padding-left: 30px;
}

.timeline-item {
    position: relative;
    padding-bottom: var(--spacing-xl);
    padding-left: var(--spacing-xl);
    border-left: 2px solid rgba(66, 133, 244, 0.2);
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -8px;
    top: 0;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--primary-color);
    border: 2px solid white;
}

.year {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.event h3 {
    font-size: 16px;
    color: var(--neutral-800);
    margin-bottom: var(--spacing-xs);
}

.event p {
    color: var(--neutral-600);
    font-size: 14px;
    line-height: 1.6;
}

/* 荣誉资质 */
.honors-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.honor-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--bg-blue-50);
    border-radius: var(--radius-md);
    transition: var(--transition-normal);
    border: 1px solid var(--bg-blue-100);
}

.honor-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.honor-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: var(--spacing-md);
    flex-shrink: 0;
}

.honor-icon img {
    max-width: 100%;
    max-height: 100%;
}

.honor-info {
    flex: 1;
}

.honor-info h3 {
    font-size: 1.1rem;
    color: var(--neutral-800);
    margin-bottom: var(--spacing-xs);
}

.honor-info p {
    color: var(--neutral-600);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* 全球布局 */
.global-presence {
    background: var(--neutral-100);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--bg-blue-100);
    margin-top: var(--spacing-xl);
}

.office-locations {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.location-item {
    text-align: center;
    padding: var(--spacing-md);
}

.location-item h3 {
    font-size: 1.1rem;
    color: var(--neutral-800);
    margin-bottom: var(--spacing-sm);
}

.location-item p {
    color: var(--neutral-600);
    line-height: 1.6;
}

/* 页脚样式 */
.footer {
    background-color: #1e1e1e;
    padding: 15px 0;
    text-align: center;
}

.footer-bottom {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
}

.footer-bottom p {
    margin: 0;
    line-height: 1.5;
    font-size: 16px;
    color: rgba(255, 255, 255, 0.7);
}

.footer-bottom .company {
    margin-bottom: 2px;
}

.footer-bottom img {
    vertical-align: middle;
    margin: 0 5px;
    height: 14px;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .about-section {
        padding: 100px 0;
    }

    .culture-content {
        grid-template-columns: repeat(2, 1fr);
    }

    .honors-list {
        grid-template-columns: repeat(2, 1fr);
    }

    .office-locations {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .about-section {
        padding: 80px 0;
    }

    .about-title h2 {
        font-size: 36px;
    }

    .about-title .about-subtitle {
        font-size: 50px;
    }

    .about-tabs {
        flex-wrap: wrap;
    }

    .tab-item {
        font-size: 14px;
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .intro-card,
    .culture-card,
    .history-card {
        padding: var(--spacing-lg);
    }

    .image-row {
        flex-direction: column;
    }

    .company-image {
        margin-bottom: var(--spacing-md);
    }

    .history-timeline::before {
        left: 80px;
    }

    .timeline-item::before {
        left: 76px;
    }

    .year {
        width: 70px;
    }

    .honor-item {
        flex-direction: column;
        text-align: center;
    }

    .honor-icon {
        margin-right: 0;
        margin-bottom: var(--spacing-md);
    }
}

@media (max-width: 576px) {
    .about-section {
        padding: 60px 0;
    }

    .about-title h2 {
        font-size: 30px;
    }

    .about-title .about-subtitle {
        font-size: 40px;
    }

    .intro-card,
    .culture-card,
    .history-card {
        padding: var(--spacing-md);
    }

    .culture-content {
        grid-template-columns: 1fr;
    }

    .honors-list {
        grid-template-columns: 1fr;
    }

    .office-locations {
        grid-template-columns: 1fr;
    }

    .intro-card,
    .culture-card,
    .history-card,
    .honors-card,
    .global-presence {
        padding: var(--spacing-lg);
    }
}