* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

.background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #8ca6ff, #c8b6e2);
    z-index: -1;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.glass-effect {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.2);
    padding: 25px;
    margin-bottom: 30px;
    transition: all 0.3s ease;
}

.glass-effect:hover {
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.3);
    transform: translateY(-5px);
}

header {
    text-align: center;
    padding: 40px 20px;
}

header h1 {
    font-size: 2.8rem;
    margin-bottom: 10px;
    color: #333;
    text-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.subtitle {
    font-size: 1.2rem;
    color: #555;
}

section {
    margin-bottom: 30px;
}

h2 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: #333;
    position: relative;
    padding-bottom: 10px;
}

h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background: rgba(106, 130, 251, 0.7);
}

p {
    margin-bottom: 15px;
    color: #444;
}

.pricing-tabs {
    display: flex;
    margin-bottom: 20px;
    border-radius: 8px;
    overflow: hidden;
}

.tab-btn {
    flex: 1;
    padding: 12px;
    background: rgba(106, 130, 251, 0.6);
    border: none;
    color: #fff;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
}

.tab-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

.tab-btn.active {
    background: rgba(106, 130, 251, 0.8);
    font-weight: bold;
}

.pricing-content {
    display: none;
}

.pricing-content.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 8px;
    overflow: hidden;
}

th, td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    color: #333;
}

th {
    background: rgba(106, 130, 251, 0.3);
    font-weight: 600;
}

tr:hover {
    background: rgba(106, 130, 251, 0.1);
}

.qr-code {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 20px 0;
}

.qr-code img {
    max-width: 200px;
}

.payment-notice {
    margin-top: 15px;
    font-size: 0.9rem;
    color: #e74c3c;
    text-align: center;
    max-width: 400px;
    font-weight: 500;
}

.device-limit {
    font-size: 0.95rem;
    color: #3498db;
    margin-bottom: 15px;
    text-align: center;
    font-weight: 500;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    background: linear-gradient(135deg, #6e8efb, #a777e3);
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    margin-top: 15px;
    transition: all 0.3s ease;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.submit-btn {
    width: 100%;
    margin-top: 20px;
}

/* 弹窗样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 100;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.5);
}

.modal-content {
    position: relative;
    margin: 10% auto;
    width: 90%;
    max-width: 500px;
    animation: modalFadeIn 0.3s;
}

@keyframes modalFadeIn {
    from {opacity: 0; transform: translateY(-50px);}
    to {opacity: 1; transform: translateY(0);}
}

.close-modal {
    position: absolute;
    right: 20px;
    top: 15px;
    font-size: 28px;
    font-weight: bold;
    color: #555;
    cursor: pointer;
}

.close-modal:hover {
    color: #000;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #333;
}

.form-group input {
    width: 100%;
    padding: 10px;
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    background: rgba(255, 255, 255, 0.8);
}

.upload-preview {
    margin-top: 10px;
    min-height: 100px;
    border: 2px dashed rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #777;
}

.upload-preview img {
    max-width: 100%;
    max-height: 200px;
    border-radius: 5px;
}
    border-radius: 10px;
    margin-bottom: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.contact i {
    margin-right: 10px;
    color: rgba(106, 130, 251, 0.8);
}

footer {
    text-align: center;
    padding: 15px;
    font-size: 0.9rem;
    color: rgba(51, 51, 51, 0.7);
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2.2rem;
    }
    
    .glass-effect {
        padding: 20px;
    }
    
    th, td {
        padding: 10px;
    }
}