如何给其他网站添加在线玩家嵌入式卡片

以下是css，放到head里面，也可以搞个单独的css文件放：
<style>
        .draggable-card {
            position: fixed;
            top: 20px;
            left: 20px;
            width: 300px;
            height: 350px;
            border-radius: 12px;
            box-shadow: 0 6px 18px rgba(0, 0, 0, 0.2);
            overflow: hidden;
            resize: both;
            z-index: 1000;
            background: white;
        }

        .drag-handle {
            background: linear-gradient(135deg, #1e88e5, #0d47a1);
            color: white;
            padding: 10px 16px;
            cursor: move;
            font-weight: bold;
            user-select: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .close-btn {
            background: rgba(255, 255, 255, 0.2);
            border: none;
            color: white;
            border-radius: 50%;
            width: 24px;
            height: 24px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            transition: background 0.2s;
        }

        .close-btn:hover {
            background: rgba(255, 255, 255, 0.3);
        }

        .draggable-card iframe {
            width: 100%;
            height: calc(100% - 40px);
            border: none;
        }
</style>





以下是卡片本体，直接塞进html里面：
<div class="draggable-card" id="serverCard">
        <div class="drag-handle">
            <span>服务器状态 (可拖动)</span>
            <button class="close-btn" id="closeBtn">×</button>
        </div>
        <iframe src="http://localhost:60048/embed" frameborder="0"></iframe>
</div>





以下是js脚本，可以跟着放script里面，也可以单独放个js文件：
<script>
        const card = document.getElementById('serverCard');
        const handle = card.querySelector('.drag-handle');
        const closeBtn = document.getElementById('closeBtn');

        let isDragging = false;
        let offsetX, offsetY;

        handle.addEventListener('mousedown', (e) => {
            if (e.target === closeBtn) return;

            isDragging = true;
            offsetX = e.clientX - card.getBoundingClientRect().left;
            offsetY = e.clientY - card.getBoundingClientRect().top;
            card.style.cursor = 'grabbing';
        });

        document.addEventListener('mousemove', (e) => {
            if (!isDragging) return;
            card.style.left = (e.clientX - offsetX) + 'px';
            card.style.top = (e.clientY - offsetY) + 'px';
        });

        document.addEventListener('mouseup', () => {
            isDragging = false;
            card.style.cursor = '';
        });

        closeBtn.addEventListener('click', () => {
            card.style.display = 'none';

            // setTimeout(() => { card.style.display = 'block'; }, 2000);  // 关闭后超时重新显示，这里暂时放着，看需求
        });
</script>