* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Microsoft YaHei', sans-serif;
}

body {
    line-height: 1.6;
    background: #f5f5f5;
}

header {
    background: #fff;
    padding: 1rem;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.logo {
    height: 40px;
}

.hero {
    text-align: center;
    padding: 4rem 1rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.cta-btn {
    background: #ff4757;
    color: white;
    padding: 1rem 2rem;
    border: none;
    border-radius: 25px;
    font-size: 1.2rem;
    margin-top: 2rem;
    cursor: pointer;
    transition: transform 0.3s;
}

    .cta-btn:hover {
        transform: scale(1.05);
    }

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    padding: 3rem 1rem;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
}

.try-section {
    text-align: center;
    padding: 3rem 1rem;
    background: #fff;
}

.qrcode {
    width: 80%;
    max-width: 200px;
    height: auto;
    margin: 1rem auto;
    display: block;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
}

.modal-content {
    background: white;
    width: 90%;
    max-width: 400px;
    padding: 2rem;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    border-radius: 10px;
}

.close {
    position: absolute;
    right: 1rem;
    top: 0.5rem;
    color: #333;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s;
}

    .close:hover {
        color: #ff4757;
    }

.wechat-card {
    width: 90%;
    max-width: 300px;
    height: auto;
    margin: 1rem auto;
    display: block;
}

footer {
    background: #333;
    color: white;
    text-align: center;
    padding: 1rem;
    font-size: 0.8rem;
    line-height: 1.5;
}

@media (max-width: 768px) {
    .features {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.5rem;
    }

    .cta-btn {
        padding: 0.8rem 1.5rem;
        font-size: 1rem;
    }
}