@charset "utf-8";
/* CSS Document */
        body {
            font-family: "Microsoft YaHei", sans-serif;
            padding: 20px;
            background: #f5f5f5;
            margin: 0;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: white;
            padding: 30px;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
        }
        h1 {
            text-align: center;
            color: #333;
            margin-bottom: 30px;
        }
        #pdfContainer {
            border: 2px solid #ddd;
            border-radius: 8px;
            overflow: hidden;
            background: #fafafa;
            height: 800px;           /* 可自行调整高度 */
            position: relative;
        }
        iframe {
            width: 100%;
            height: 100%;
            border: none;
            display: block;
        }
        .loading {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            color: #666;
            font-size: 16px;
        }
        .tip {
            text-align: center;
            margin-top: 15px;
            color: #666;
            font-size: 14px;
        }