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</nav> <div class="container"> <h1>🔢 进制转换�?/h1> <div class="card"> <div class="input-group"> <label for="input-----">输入数�?/label> <input type="text" id="input" value="255" placeholder="输入数字" aria-label="文本输入�? /> </div> <div class="input-group"> <label>输入进制</label> <select id="fromBase"> <option value="2">二进�?/option> <option value="8">八进�?/option> <option value="10" selected>十进�?/option> <option value="16">十六进制</option> </select> </div> <div class="results" id="results"></div> </div> </div> <script> function convert() { const input = document.getElementById("input").value.trim(); const fromBase = parseInt(document.getElementById("fromBase").value); const num = parseInt(input, fromBase); if (isNaN(num)) { document.getElementById("results").innerHTML = '<p style="color:#e74c3c;text-align:center">无效输入</p>'; return; } document.getElementById("results").innerHTML = [ { label: "二进�?(Binary)", value: num.toString(2) }, { label: "八进�?(Octal)", value: num.toString(8) }, { label: "十进�?(Decimal)", value: num.toString(10) }, { label: "十六进制 (Hex)", value: num.toString(16).toUpperCase() } ] .map( (r) => '<div class="result-item"><span class="result-label">' + r.label + '</span><span class="result-value">' + r.value + "</span></div>" ) .join(""); } document.getElementById("input").addEventListener("input", convert); document.getElementById("fromBase").addEventListener("change", convert); convert(); // Theme toggle function toggleTheme() { const html = document.documentElement; const currentTheme = html.getAttribute("data-theme"); const newTheme = currentTheme === "light" ? 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