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<html><head><style>a:link, a:visited { background-color: white; color: black; border: 2px solid green; padding: 10px 20px; text-align: center; text-decoration: none; display: inline-block;}a:hover, a:active { background-color: green; color: white;}</style></head><body><a href="index.html" target="_blank">Это ссылка</a></body></html>