/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background-color: #f5f5f5;
    line-height: 1.6;
}

.container {
    max-width: 100%;
    padding: 0;
}

.content-section {
    padding: 60px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

h1 {
    text-align: center;
    margin-bottom: 20px;
    color: #333;
}

.description {
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 30px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

/* 全屏宽度视频播放器样式 */
.fullwidth-video-container {
    position: relative;
    width: 100%;
    height: 60vh; /* 使用视口高度单位 */
    min-height: 500px; /* 最小高度 */
    overflow: hidden;
}

.video-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #000;
    z-index: 1;
}

.fullwidth-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 2;
}

.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(0,0,0,0.3), rgba(0,0,0,0.7));
    z-index: 3;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 45px;
    text-align: center;
    color: white;
}

.video-title {
    font-size: 3rem;
    font-weight: bold;
    margin-bottom: 20px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.5);
}

.video-subtitle {
    font-size: 1.5rem;
    opacity: 0.9;
    max-width: 800px;
}

/* 控制按钮样式 */
.video-controls {
    position: absolute;
    bottom: 30px;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: center;
    z-index: 4;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.fullwidth-video-container:hover .video-controls {
    opacity: 1;
}

.control-btn {
    background: rgba(0,0,0,0.6);
    color: white;
    border: none;
    border-radius: 4px;
    padding: 12px 20px;
    margin: 0 10px;
    cursor: pointer;
    font-size: 16px;
    transition: background 0.3s ease;
}

.control-btn:hover {
    background: rgba(0,0,0,0.8);
}

/* 响应式调整 */
@media (max-width: 768px) {
    .fullwidth-video-container {
        height: 50vh;
        min-height: 400px;
    }
    
    .video-title {
        font-size: 2rem;
    }
    
    .video-subtitle {
        font-size: 1.2rem;
    }
    
    .control-btn {
        padding: 10px 15px;
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    .fullwidth-video-container {
        height: 40vh;
        min-height: 300px;
    }
    
    .video-title {
        font-size: 1.5rem;
    }
    
    .video-subtitle {
        font-size: 1rem;
    }
}