/* 防采集CSS */
body {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    -webkit-touch-callout: none;
    -webkit-tap-highlight-color: transparent;
}

/* 允许表单元素选择 */
input, textarea {
    -webkit-user-select: text;
    -moz-user-select: text;
    -ms-user-select: text;
    user-select: text;
}

/* 防止拖拽图片 */
img {
    -webkit-user-drag: none;
    -khtml-user-drag: none;
    -moz-user-drag: none;
    -o-user-drag: none;
    user-drag: none;
    pointer-events: none;
}

/* 防止打印样式泄露 */
@media print {
    body * {
        visibility: hidden;
    }
    .print-only {
        visibility: visible;
    }
    .print-only:before {
        content: "本内容受版权保护，禁止复制和打印";
        font-size: 20px;
        text-align: center;
        display: block;
        margin: 50px;
    }
}

/* 隐藏文本用于混淆爬虫 */
.anti-spider {
    position: absolute;
    left: -9999px;
    opacity: 0;
    font-size: 0;
    line-height: 0;
}

/* CSS防复制 */
.article-content::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: transparent;
    z-index: 1;
    pointer-events: none;
}