/* 项目介绍页面样式 */
.project-intro-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", Arial, sans-serif;
}

.intro-header {
    text-align: center;
    margin-bottom: 40px;
    padding: 20px;
    background: linear-gradient(135deg, #6441a5 0%, #2a0845 100%);
    color: white;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.intro-header h2 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
}

.section {
    margin-bottom: 40px;
}

.section-title {
    font-size: 1.8rem;
    color: #333;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #6441a5;
}

.content-card {
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    line-height: 1.6;
}

/* 功能模块网格布局 */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.feature-card {
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.15);
}

.feature-icon {
    font-size: 2rem;
    color: #6441a5;
    margin-bottom: 15px;
}

.feature-card h4 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: #333;
}

/* 新增功能列表样式 */
.feature-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.feature-item {
    display: flex;
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.feature-item .feature-icon {
    flex: 0 0 60px;
    font-size: 2rem;
    color: #6441a5;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-item .feature-content {
    flex: 1;
}

.feature-item h4 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: #333;
}

/* 平台优势网格布局 */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
}

.advantage-card {
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    position: relative;
    overflow: hidden;
}

.advantage-number {
    position: absolute;
    top: 10px;
    right: 10px;
    font-size: 2rem;
    font-weight: bold;
    color: rgba(100, 65, 165, 0.1);
}

.advantage-card h4 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: #333;
}

/* 联系我们部分 */
.contact-section {
    background-color: #f9f9f9;
    padding: 20px;
    border-radius: 8px;
}

.contact-info {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 10px;
    background-color: #fff;
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    flex: 1 1 300px;
}

.contact-item i {
    font-size: 1.5rem;
    color: #6441a5;
}

/* 视频容器样式 */
.video-container {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 比例 */
    height: 0;
    overflow: hidden;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .intro-header h2 {
        font-size: 1.8rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .feature-grid, .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    .feature-item {
        flex-direction: column;
    }
    
    .feature-item .feature-icon {
        margin-bottom: 15px;
    }
}