body {
    font-family: "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background: #f0f2f5;
    color: #333;
}

#mainbody {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
}

.price-card {
    background: white;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    overflow: hidden;
}

.card-header {
    background: linear-gradient(135deg, #1e88e5 0%, #1565c0 100%);
    color: white;
    padding: 2rem;
    text-align: center;
}

.card-header h1 {
    margin: 0;
    font-size: 2.5rem;
    font-weight: 600;
}

.subtitle {
    margin: 1rem 0 0;
    opacity: 0.9;
    font-size: 1.2rem;
}

.card-content {
    padding: 2rem;
}

.feature-list {
    display: grid;
    gap: 1rem;
    margin-bottom: 2rem;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 10px;
    transition: all 0.3s ease;
}

.feature-item:hover {
    transform: translateX(5px);
    background: #f0f4f8;
}

.feature-item i {
    font-size: 1.2rem;
    color: #2196f3;
}

.feature-item.highlight {
    background: #e3f2fd;
    border: 1px dashed #2196f3;
}

.feature-item.highlight i {
    color: #f44336;
}

.help-icon {
    margin-left: auto;
    color: #9e9e9e;
    cursor: help;
}

.description-box {
    background: #f8f9fa;
    padding: 1.5rem;
    border-radius: 10px;
    margin: 2rem 0;
}

.system-intro, .feature-text, .usage-text {
    margin: 0.5rem 0;
    color: #546e7a;
}

.action-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-primary {
    background: #2196f3;
    color: white;
    border: none;
}

.btn-primary:hover {
    background: #1976d2;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(33, 150, 243, 0.3);
}

.btn-outline {
    border: 2px solid #2196f3;
    color: #2196f3;
    background: transparent;
}

.btn-outline:hover {
    background: #2196f3;
    color: white;
}

footer {
    text-align: center;
    padding: 2rem;
    background: white;
    color: #666;
}

footer a {
    color: #2196f3;
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    #mainbody {
        padding: 1rem;
    }

    .card-header h1 {
        font-size: 2rem;
    }

    .action-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }
}


/* 模态框样式 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal.is-active {
    display: flex;
}
.modal-content {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    position: relative;
    max-width: 400px;
    width: 90%;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.close-btn {
    position: absolute;
    right: 15px;
    top: 10px;
    font-size: 24px;
    cursor: pointer;
    color: #666;
}

.close-btn:hover {
    color: #333;
}

.wechat-id {
    font-size: 1.2rem;
    color: #333;
    margin: 1rem 0;
    font-weight: 500;
}

.qr-code {
    max-width: 200px;
    width: 100%;
    height: auto;
    margin: 1rem 0;
}

.scan-tip {
    color: #666;
    margin-top: 1rem;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .modal-content {
        margin: 1rem;
        padding: 1.5rem;
    }
}