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

body {
    font-family: 'Microsoft JhengHei', 'PingFang TC', 'Heiti TC', sans-serif;
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    background: white;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 40px 30px;
    text-align: center;
}

.header h1 {
    font-size: 32px;
    margin-bottom: 10px;
    font-weight: 600;
}

.header .logo {
    font-size: 18px;
    opacity: 0.9;
}

.event-info {
    background: #f8f9fa;
    padding: 30px;
    border-bottom: 3px solid #667eea;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.info-item {
    background: white;
    padding: 20px;
    border-radius: 12px;
    border-left: 4px solid #667eea;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.info-label {
    font-weight: 600;
    color: #667eea;
    margin-bottom: 8px;
    font-size: 14px;
}

.info-value {
    color: #333;
    font-size: 15px;
    line-height: 1.6;
}

.form-section {
    padding: 40px 30px;
}

.form-group {
    margin-bottom: 25px;
}

.form-label {
    display: block;
    font-weight: 600;
    color: #333;
    margin-bottom: 8px;
    font-size: 15px;
}

.required {
    color: #e74c3c;
    margin-left: 4px;
}

input[type="text"],
input[type="email"],
input[type="tel"] {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 15px;
    transition: all 0.3s;
    font-family: inherit;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="tel"]:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.phone-group {
    display: grid;
    grid-template-columns: 1fr auto auto 100px;
    gap: 10px;
    align-items: center;
}

.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 10px;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

input[type="checkbox"],
input[type="radio"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: #667eea;
}

.checkbox-item label,
.radio-item label {
    cursor: pointer;
    user-select: none;
    font-size: 15px;
}

.info-box {
    background: #fff3cd;
    border: 2px solid #ffc107;
    border-radius: 8px;
    padding: 15px;
    margin: 20px 0;
    color: #856404;
    line-height: 1.8;
}

.privacy-section {
    background: #e8f4f8;
    border: 2px solid #17a2b8;
    border-radius: 8px;
    padding: 20px;
    margin: 25px 0;
}

.privacy-section p {
    line-height: 1.8;
    margin-bottom: 15px;
    color: #333;
}

.radio-group {
    display: flex;
    gap: 30px;
    margin-top: 15px;
}

.radio-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.submit-section {
    text-align: center;
    padding: 30px;
    background: #f8f9fa;
}

.submit-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 16px 60px;
    font-size: 18px;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.submit-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

.submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.contact-info {
    background: #f8f9fa;
    padding: 30px;
    border-top: 3px solid #667eea;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.contact-item {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.footer {
    background: #2c3e50;
    color: white;
    text-align: center;
    padding: 20px;
    font-size: 14px;
}

.conditional-field {
    display: none;
    margin-top: 15px;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 8px;
    border-left: 4px solid #667eea;
}

.conditional-field.show {
    display: block;
}

.error-message {
    color: #e74c3c;
    font-size: 14px;
    margin-top: 5px;
    display: none;
}

@media (max-width: 768px) {
    .header h1 {
        font-size: 24px;
    }

    .phone-group {
        grid-template-columns: 1fr;
    }

    .info-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .checkbox-group,
    .radio-group {
        flex-direction: column;
        gap: 15px;
    }
}