/* About Us 单页样式 - 视频 + 文字排版 */

/* 视频区域 - 幻灯片与正文之间，大屏全宽 */
.about-video-hero {
    position: relative;
    width: 100%;
    max-width: 1140px;
    margin: 3rem auto 0;
    height: 0;
    padding-bottom: 42%;
    overflow: hidden;
    background: #000;
    border-radius: 8px;
}

.about-hero-video {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    transform: translate(-50%, -50%);
    object-fit: cover;
}

.about-video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(0,0,0,0.2) 0%, transparent 50%, rgba(0,0,0,0.1) 100%);
    pointer-events: none;
}

/* 正文区域 - 保持纯文本，便于AI翻译 */
.about-content-section {
    background: #fff;
}

.about-content-inner {
    max-width: 900px;
    margin: 0 auto;
}

.about-main-title {
    font-size: 2rem;
    font-weight: 700;
    color: #212121;
    margin-bottom: 1.5rem;
    text-align: center;
}

.about-content-body {
    font-size: 1rem;
    line-height: 1.8;
    color: #333;
}

.about-content-body h2,
.about-content-body h3,
.about-content-body h4 {
    font-weight: 600;
    color: #212121;
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.about-content-body h2 { font-size: 1.5rem; }
.about-content-body h3 { font-size: 1.25rem; }
.about-content-body h4 { font-size: 1.1rem; }

.about-content-body p {
    margin-bottom: 1rem;
}

.about-content-body p:last-child {
    margin-bottom: 0;
}

/* 响应式 */
@media (max-width: 991px) {
    .about-video-hero {
        padding-bottom: 56%;
        margin-left: 15px;
        margin-right: 15px;
    }
}

@media (max-width: 767px) {
    .about-video-hero {
        padding-bottom: 75%;
        margin-left: 15px;
        margin-right: 15px;
    }
    
    .about-main-title {
        font-size: 1.5rem;
    }
    
    .about-content-body {
        font-size: 0.95rem;
    }
}