摘要：BMI计算器:root{--body-bg-start:#e8eaf6;--body-bg-end:#d1c4e9;--card-bg:rgba(255,255,255,0.9);--bu

BMI 计算器:root {--body-bg-start: #e8eaf6;--body-bg-end: #d1c4e9;--card-bg: rgba(255, 255, 255, 0.9);--button-gradient-start: #7e57c2;--button-gradient-end: #9575cd;--button-hover-gradient-start: #673ab7;--button-hover-gradient-end: #8e67c7;--input-border: #bdbdbd;--input-focus-border: #7e57c2;--underweight-bg: #b3e5fc;--normal-bg: #c8e6c9;--overweight-bg: #ffe0b2;--obese-bg: #ffcdd2;--text-color: #212121;--shadow-color: rgba(0, 0, 0, 0.1);}body {font-family: 'Roboto', sans-serif;background: linear-gradient(to bottom, var(--body-bg-start), var(--body-bg-end));color: var(--text-color);display: flex;justify-content: center;align-items: center;min-height: 100vh;margin: 0;}.card {background-color: var(--card-bg);border-radius: 20px;box-shadow: 0 16px 32px var(--shadow-color);padding: 60px;width: 90%;max-width: 700px;box-sizing: border-box;}h1 {text-align: center;font-size: 32px;margin-bottom: 40px;}.input-group {margin-bottom: 30px;}label {display: block;margin-bottom: 12px;font-size: 20px;font-weight: 500;}input[type="number"] {width: 100%;padding: 18px;border: 1px solid var(--input-border);border-radius: 10px;transition: border-color 0.3s ease;font-size: 18px;box-sizing: border-box;}input[type="number"]:focus {border-color: var(--input-focus-border);outline: none;}button {width: 100%;padding: 18px;background: linear-gradient(to right, var(--button-gradient-start), var(--button-gradient-end));color: white;border: none;border-radius: 10px;box-shadow: 0 8px 16px var(--shadow-color);cursor: pointer;transition: background 0.3s ease;font-size: 20px;font-weight: 500;}button:hover {background: linear-gradient(to right, var(--button-hover-gradient-start), var(--button-hover-gradient-end));}#result {margin-top: 40px;padding: 30px;border-radius: 10px;text-align: center;display: none;font-size: 22px;}#result .bmi-value {font-size: 32px;font-weight: 700;}.danmaku {position: fixed;top: 0;right: 0;pointer-events: none;z-index: 999;white-space: nowrap;padding: 16px 32px;border-radius: 30px;color: white;background-color: hsl(calc(var(--random-hue, 0) * 360), 30%, 60%);animation: danmakuMove linear;}@keyframes danmakuMove {from {transform: translateX(100%);}to {transform: translateX(-100vw);}}

BMI 计算器

你的身高(cm)你的体重(kg)计算 BMIfunction calculateBMI {const height = parseFloat(document.getElementById('height').value);const weight = parseFloat(document.getElementById('weight').value);if (isNaN(height) || isNaN(weight) || height = 18.5 && bmi = 24 && bmi ${bmi}，体重分类：${category}`;resultDiv.style.display = 'block';resultDiv.style.backgroundColor = resultBg;generateDanmaku(message);}function generateDanmaku(message) {const numDanmaku = Math.floor(window.innerHeight / 50);for (let i = 0; i {danmaku.remove;});}}