@charset "utf-8";

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Microsoft YaHei', sans-serif;
            background-color: #f5f9ff;
            color: #333;
            line-height: 1.6;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }
        
        header {
            text-align: center;
            margin-bottom: 30px;
        }
        
        h1 {
            color: #2c6fbb;
            margin-bottom: 10px;
            font-size: 2.2rem;
        }
        
        .subtitle {
            color: #666;
            font-size: 1.1rem;
        }
        
        .video-container {
            position: relative;
            width: 100%;
            height: 0;
            padding-bottom: 56.25%; /* 16:9 比例 */
            margin-bottom: 40px;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        
        .video-container iframe {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            border: none;
        }
        
        .steps-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 25px;
        }
        
        .step-card {
            background: white;
            border-radius: 10px;
            padding: 20px;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        
        .step-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        
        .step-number {
            display: inline-block;
            background: #2c6fbb;
            color: white;
            width: 30px;
            height: 30px;
            border-radius: 50%;
            text-align: center;
            line-height: 30px;
            margin-bottom: 15px;
            font-weight: bold;
        }
        
        .step-title {
            color: #2c6fbb;
            margin-bottom: 15px;
            font-size: 1.2rem;
        }
        
        .step-image {
            width: 100%;
            height: 180px;
            background-color: #e9f2ff;
            border-radius: 8px;
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #7aa7d8;
            font-size: 1rem;
            overflow: hidden;
        }
        
        .step-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        
        .step-description {
            margin-bottom: 15px;
            color: #555;
        }
        
        .acupoints {
            background: #f0f7ff;
            padding: 12px;
            border-radius: 6px;
            border-left: 4px solid #2c6fbb;
        }
        
        .acupoints h4 {
            color: #2c6fbb;
            margin-bottom: 8px;
        }
        
        .acupoints ul {
            padding-left: 20px;
        }
        
        .acupoints li {
            margin-bottom: 5px;
        }
        
        footer {
            text-align: center;
            margin-top: 40px;
            padding: 20px;
            color: #777;
            font-size: 0.9rem;
        }
        
        @media (max-width: 768px) {
            .steps-container {
                grid-template-columns: 1fr;
            }
            
            h1 {
                font-size: 1.8rem;
            }
        }