.sidebar { border: 1px solid #ccc; } .rmdwarn { border: 1px solid #EA4335; } .rmdnote { border: 1px solid #FBBC05; } .rmdtip { border: 1px solid #34A853; } .sidebar, .rmdwarn, .rmdnote, .rmdtip { border-left-width: 5px; border-radius: 5px; padding: 1em; margin: 1em 0; } div.rmdwarn::before, div.rmdnote::before, div.rmdtip::before { display: block; font-size: 1.1em; font-weight: bold; margin-bottom: 0.25em; } div.rmdwarn::before { content: “警告”; color: #EA4335; } div.rmdnote::before { …