:root {
    --primary-color: #4A90E2;
    --secondary-color: #2C3E50;
    --background-color: #F5F7FA;
    --text-color: #333;
    --border-color: #E1E8ED;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    padding: 40px 0;
}

.logo {
    width: 80px;
    height: 80px;
    margin-bottom: 20px;
}

.subtitle {
    color: var(--secondary-color);
    font-size: 1.2em;
    margin-top: 10px;
}

/* 价格卡片样式 */
.price-card {
    background: white;
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin: 20px auto;
    max-width: 400px;
}

.price {
    font-size: 3em;
    color: var(--primary-color);
    margin: 20px 0;
    font-weight: bold;
}

.features {
    list-style: none;
    text-align: left;
    margin: 20px 0;
}

.features li {
    margin: 10px 0;
    padding-left: 20px;
}

/* 支付部分样式 */
.payment-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
    margin: 30px 0;
    flex-wrap: wrap;
}

.qr-code {
    width: 200px;
    height: 200px;
    border: 1px solid var(--border-color);
    padding: 10px;
    background: white;
}

.payment-instructions {
    max-width: 300px;
}

.payment-instructions p {
    margin: 15px 0;
}

/* FAQ 部分样式 */
.faq-container {
    max-width: 600px;
    margin: 0 auto;
}

details {
    background: white;
    padding: 15px;
    margin: 10px 0;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

summary {
    cursor: pointer;
    font-weight: bold;
    color: var(--primary-color);
}

details p {
    margin-top: 10px;
    padding: 10px;
    color: var(--secondary-color);
}

/* 页脚样式 */
footer {
    text-align: center;
    margin-top: 60px;
    padding: 20px;
    color: var(--secondary-color);
    border-top: 1px solid var(--border-color);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .payment-container {
        flex-direction: column;
        text-align: center;
    }
    
    .price-card {
        margin: 10px;
    }
}

.activation-code {
    font-family: monospace;
    font-size: 24px;
    font-weight: bold;
    color: #2196F3;
    background-color: #E3F2FD;
    padding: 15px 25px;
    margin: 20px 0;
    border-radius: 8px;
    text-align: center;
    border: 2px dashed #2196F3;
    letter-spacing: 2px;
    user-select: all;
    cursor: pointer;
    transition: all 0.3s ease;
}

.activation-code:hover {
    background-color: #BBDEFB;
    transform: scale(1.02);
}