body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 20px;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.container {
    text-align: center;
    max-width: 500px;
    width: 100%;
    padding: 30px;
}

h1 {
    color: #2c3e50;
    font-size: 2.2em;
    margin-bottom: 40px;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.1);
}

.button-container {
    display: flex;
    justify-content: center;
}

.calculator-button {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    background-color: #3498db;
    color: white;
    padding: 30px 50px;
    border-radius: 15px;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
    min-width: 220px;
    min-height: 180px;
}

.calculator-button:hover {
    background-color: #2980b9;
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.25);
}

.button-icon {
    font-size: 3em;
    margin-bottom: 15px;
}

.button-text {
    font-size: 1.4em;
    font-weight: bold;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.2);
}

/* 移动端适配 */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    
    .container {
        padding: 20px;
    }
    
    h1 {
        font-size: 1.8em;
        margin-bottom: 30px;
    }
    
    .calculator-button {
        padding: 25px 40px;
        min-width: 180px;
        min-height: 150px;
    }
    
    .button-icon {
        font-size: 2.5em;
    }
    
    .button-text {
        font-size: 1.2em;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.5em;
    }
    
    .calculator-button {
        padding: 20px 30px;
        min-width: 160px;
        min-height: 140px;
        width: 80%;
    }
    
    .button-icon {
        font-size: 2em;
    }
    
    .button-text {
        font-size: 1.1em;
    }
}