/* ===== 关于我们页面专用样式 ===== */

/* 顶部背景图区域 - 使用网络图片 */
.about-banner {
    position: relative;
    height: 75vh;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    overflow: hidden;
}

/* 隐藏视频元素，只显示背景图 */
.about-banner video {
    display: none;
}

/* 关于我们页面横幅内容 */
.about-banner .banner-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: white;
    z-index: 5;
    width: 100%;
}

.about-banner .banner-title {
    font-size: 4em;
    font-weight: bold;
    text-transform: uppercase;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    letter-spacing: 2px;
}

.about-banner .banner-subtitle {
    font-size: 1.8em;
    font-weight: 300;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
    opacity: 0.9;
}

/* 关于我们页面导航栏初始样式 - 与首页相同，透明背景，白色按钮和logo */
.about-banner .nav-bar {
    background-color: transparent;
    box-shadow: none;
}

.about-banner .menu-button {
    color: white;
}

.about-banner .logo-white {
    display: block;
}

.about-banner .logo-black {
    display: none;
}

/* 关于我们页面导航栏滚动样式 - 与首页相同 */
.about-banner .nav-bar.scrolled {
    position: fixed;
    background-color: white;
    align-items: center;
    opacity: 1;
    transform: translateY(0);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.about-banner .nav-bar.scrolled .menu-button {
    color: black;
}

.about-banner .nav-bar.scrolled .logo-white {
    display: none;
}

.about-banner .nav-bar.scrolled .logo-black {
    display: block;
}

/* 内容区域 */
.about-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 20px;
    background-color: white;
}

.about-content {
    line-height: 1.8;
    color: #333;
}

/* 介绍段落 */
.about-intro {
    font-size: 1.2em;
    margin-bottom: 50px;
    text-indent: 2em;
    color: #333;
    font-weight: 300;
    opacity: 0.9;
}

/* 段落区域 */
.about-section {
    margin-bottom: 50px;
}

/* 标题样式 - 比正文大0.2倍字体并加粗，左对齐 */
.section-title {
    font-size: 1.4em; /* 正文1.2em + 0.2em = 1.4em */
    font-weight: bold;
    margin-bottom: 20px;
    color: #333;
    text-align: left;
    border-left: none;
    padding-left: 0;
    background-color: transparent;
}

/* 子标题样式 */
.subsection-title {
    font-size: 1.3em;
    font-weight: bold;
    margin: 25px 0 15px 0;
    color: #333;
    text-align: left;
    border-left: none;
    padding-left: 0;
    background-color: transparent;
}

/* 正文内容样式 - 与首页副标题字体相同 */
.section-content {
    font-size: 1.2em;
    color: #333;
    font-weight: 300;
    opacity: 0.9;
    margin-bottom: 20px;
    text-align: justify;
    text-indent: 2em;
    line-height: 1.8;
}

/* 去掉所有绿色线条和背景块 */
.about-section::before,
.section-title::before,
.section-title::after,
.subsection-title::before,
.subsection-title::after {
    display: none !important;
}

.about-section,
.section-title,
.subsection-title {
    background-color: transparent !important;
    border: none !important;
}

/* 企业文化列表 - 修复：移除小圆点 */
.culture-list {
    list-style-type: none; /* 确保没有列表标记 */
    padding-left: 0; /* 移除左边距 */
    margin: 20px 0;
}

.culture-list li {
    font-size: 1.2em;
    color: #333;
    font-weight: 300;
    opacity: 0.9;
    margin-bottom: 15px;
    line-height: 1.6;
    position: relative;
    padding-left: 0; /* 确保没有左边距 */
}

/* 移除小圆点伪元素 */
.culture-list li::before {
    display: none !important; /* 确保不显示小圆点 */
}

/* 办公图片 */
.office-image-container {
    margin: 80px auto 40px;
    width: 100%;
    overflow: hidden;
    position: relative;
}

.office-image {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.5s ease;
    cursor: pointer;
}

.office-image:hover {
    transform: scale(1.05);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .about-banner {
        height: 60vh;
    }

    .about-banner .banner-title {
        font-size: 2.5em;
        margin-bottom: 15px;
    }

    .about-banner .banner-subtitle {
        font-size: 1.2em;
    }

    .about-container {
        padding: 40px 15px;
    }

    .about-intro,
    .section-content,
    .culture-list li {
        font-size: 1.1em;
    }

    .section-title {
        font-size: 1.3em;
    }

    .subsection-title {
        font-size: 1.2em;
    }

    .office-image-container {
        margin: 50px auto 30px;
    }
}

@media (max-width: 480px) {
    .about-banner {
        height: 50vh;
    }

    .about-banner .banner-title {
        font-size: 2em;
    }

    .about-banner .banner-subtitle {
        font-size: 1em;
    }

    .about-container {
        padding: 30px 10px;
    }

    .about-intro,
    .section-content,
    .culture-list li {
        font-size: 1em;
        text-indent: 1.5em;
    }

    .section-title {
        font-size: 1.2em;
    }

    .subsection-title {
        font-size: 1.1em;
    }

    .culture-list {
        padding-left: 0; /* 移动端也确保没有左边距 */
    }

    .culture-list li {
        padding-left: 0; /* 移动端也确保没有左边距 */
    }
}