🤝 網頁三兄弟協作實戰

<!-- HTML大哥搭建的結構 -->
<div class="weather-app">
    <header class="weather-header">
        <h1>🌦️ 智慧天氣</h1>
        <input type="text" id="city-input" placeholder="輸入城市名稱...">
        <button id="search-btn">搜尋</button>
    </header>
    
    <main class="weather-main">
        <div class="weather-display">
            <div class="weather-icon" id="weather-icon">☀️</div>
            <div class="temperature" id="temperature">25°C</div>
            <div class="weather-desc" id="weather-desc">晴天</div>
        </div>
        
        <div class="weather-details">
            <div class="weather-item">
                <span>濕度</span>
                <span id="humidity">60%</span>
            </div>
            <div class="weather-item">
                <span>風速</span>
                <span id="wind-speed">5 km/h</span>
            </div>
            <div class="weather-item">
                <span>氣壓</span>
                <span id="pressure">1013 hPa</span>
            </div>
        </div>
    </main>
</div>

/* CSS二哥設計的美麗樣式 */
.weather-app {
    background: linear-gradient(135deg, #74b9ff, #0984e3);
    color: white;
    border-radius: 20px;
    padding: 2rem;
    text-align: center;
    box-shadow: 0 15px 35px rgba(116, 185, 255, 0.3);
    backdrop-filter: blur(10px);
}

.weather-header {
    margin-bottom: 2rem;
}

.weather-header h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

#city-input {
    padding: 1rem;
    border: none;
    border-radius: 25px;
    width: 200px;
    margin-right: 1rem;
    outline: none;
    font-size: 1rem;
}

#search-btn {
    background: rgba(255,255,255,0.2);
    color: white;
    border: 2px solid rgba(255,255,255,0.3);
    padding: 1rem 2rem;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
}

#search-btn:hover {
    background: rgba(255,255,255,0.3);
    transform: translateY(-2px);
}

.weather-icon {
    font-size: 5rem;
    margin: 1rem 0;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.temperature {
    font-size: 4rem;
    font-weight: bold;
    margin: 1rem 0;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.weather-details {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-top: 2rem;
}

.weather-item {
    background: rgba(255,255,255,0.2);
    padding: 1.5rem;
    border-radius: 15px;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255,255,255,0.3);
    transition: transform 0.3s ease;
}

.weather-item:hover {
    transform: scale(1.05);
}

// JavaScript小弟實現的互動功能
class WeatherApp {
    constructor() {
        this.initializeApp();
    }
    
    initializeApp() {
        // 綁定事件監聽器
        document.getElementById('search-btn').addEventListener('click', () => {
            this.searchWeather();
        });
        
        document.getElementById('city-input').addEventListener('keypress', (e) => {
            if (e.key === 'Enter') {
                this.searchWeather();
            }
        });
        
        // 載入預設城市天氣
        this.loadDefaultWeather();
    }
    
    async searchWeather() {
        const city = document.getElementById('city-input').value.trim();
        if (!city) {
            alert('請輸入城市名稱！');
            return;
        }
        
        try {
            // 模擬API請求
            const weatherData = await this.fetchWeatherData(city);
            this.updateWeatherDisplay(weatherData);
        } catch (error) {
            console.error('天氣資料獲取失敗:', error);
            alert('無法獲取天氣資料，請檢查城市名稱');
        }
    }
    
    async fetchWeatherData(city) {
        // 模擬API回應資料
        return new Promise((resolve) => {
            setTimeout(() => {
                const mockData = {
                    city: city,
                    temperature: Math.floor(Math.random() * 30) + 10,
                    description: ['晴天', '多雲', '小雨', '陰天'][Math.floor(Math.random() * 4)],
                    humidity: Math.floor(Math.random() * 40) + 40,
                    windSpeed: Math.floor(Math.random() * 20) + 5,
                    pressure: Math.floor(Math.random() * 50) + 1000,
                    icon: ['☀️', '⛅', '🌧️', '☁️'][Math.floor(Math.random() * 4)]
                };
                resolve(mockData);
            }, 1000);
        });
    }
    
    updateWeatherDisplay(data) {
        // 更新DOM元素
        document.getElementById('weather-icon').textContent = data.icon;
        document.getElementById('temperature').textContent = `${data.temperature}°C`;
        document.getElementById('weather-desc').textContent = data.description;
        document.getElementById('humidity').textContent = `${data.humidity}%`;
        document.getElementById('wind-speed').textContent = `${data.windSpeed} km/h`;
        document.getElementById('pressure').textContent = `${data.pressure} hPa`;
        
        // 添加更新動畫
        this.animateUpdate();
    }
    
    animateUpdate() {
        const elements = document.querySelectorAll('.weather-display > *, .weather-item');
        elements.forEach((el, index) => {
            el.style.animation = 'none';
            setTimeout(() => {
                el.style.animation = `fadeIn 0.5s ease ${index * 0.1}s both`;
            }, 10);
        });
    }
    
    loadDefaultWeather() {
        // 載入預設城市（台北）的天氣
        this.updateWeatherDisplay({
            city: '台北',
            temperature: 25,
            description: '晴天',
            humidity: 60,
            windSpeed: 8,
            pressure: 1013,
            icon: '☀️'
        });
    }
}

// 初始化應用程式
document.addEventListener('DOMContentLoaded', () => {
    new WeatherApp();
});