/* 全局样式重置 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
          }
        body {
            background-color: #f5f7fa;
            padding: 30px;
            font-family: "Microsoft Yahei", sans-serif;
        }
        /* 外层标题容器 */
        .pdf-wrap {
            max-width: 1200px;
            margin: 0 auto;
        }
        .pdf-title {
            font-size: 22px;
            color: #222;
            margin-bottom: 16px;
            font-weight: 500;
        }
        /* PDF阅读器容器（CSS核心样式） */
        .pdf-box {
            width: 100%;
            height: 87vh;
            border: 1px solid #dcdfe6;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 2px 12px rgba(0,0,0,0.08);
            background: #fff;
        }
        /* 适配移动端高度 */
        @media (max-width:768px) {
            .pdf-box {
                height: 75vh;
            }
            body {
                padding: 10px;
            }
        }