/* 网站样式文件 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

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

.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 20px;
    margin-bottom: 30px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.header h1 {
    color: #4a5568;
    font-size: 2.5em;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.header p {
    color: #718096;
    font-size: 1.1em;
}

.nav {
    background: rgba(255, 255, 255, 0.9);
    border-radius: 10px;
    padding: 15px;
    margin-bottom: 30px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 30px;
}

.nav a {
    text-decoration: none;
    color: #4a5568;
    font-weight: 500;
    padding: 10px 20px;
    border-radius: 25px;
    transition: all 0.3s ease;
}

.nav a:hover {
    background: #667eea;
    color: white;
    transform: translateY(-2px);
}

.main-content {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    padding: 40px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

.form-container {
    max-width: 600px;
    margin: 0 auto;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #4a5568;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.9);
}

.form-control:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    transform: translateY(-1px);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    border: none;
    border-radius: 25px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.btn-secondary {
    background: linear-gradient(135deg, #718096 0%, #4a5568 100%);
}

.btn-danger {
    background: linear-gradient(135deg, #f56565 0%, #e53e3e 100%);
}

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

.alert {
    padding: 15px 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-weight: 500;
}

.alert-success {
    background: #c6f6d5;
    color: #22543d;
    border: 1px solid #9ae6b4;
}

.alert-danger {
    background: #fed7d7;
    color: #742a2a;
    border: 1px solid #feb2b2;
}

.alert-info {
    background: #bee3f8;
    color: #2a4365;
    border: 1px solid #90cdf4;
}

.card {
    background: rgba(255, 255, 255, 0.9);
    border-radius: 12px;
    padding: 25px;
    margin-bottom: 20px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.card-header {
    border-bottom: 2px solid #e2e8f0;
    padding-bottom: 15px;
    margin-bottom: 20px;
}

.card-title {
    color: #4a5568;
    font-size: 1.5em;
    font-weight: 600;
}

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

.user-info-item {
    background: rgba(102, 126, 234, 0.1);
    padding: 15px;
    border-radius: 8px;
    border-left: 4px solid #667eea;
}

.user-info-label {
    font-weight: 600;
    color: #4a5568;
    margin-bottom: 5px;
}

.user-info-value {
    color: #2d3748;
}

.footer {
    text-align: center;
    margin-top: 50px;
    color: rgba(255, 255, 255, 0.8);
}

.footer p {
    margin-bottom: 10px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .main-content {
        padding: 20px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .nav ul {
        flex-direction: column;
        gap: 15px;
    }
    
    .header h1 {
        font-size: 2em;
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 表单验证样式 */
.form-control.error {
    border-color: #f56565;
    box-shadow: 0 0 0 3px rgba(245, 101, 101, 0.1);
}

.error-message {
    color: #f56565;
    font-size: 14px;
    margin-top: 5px;
    display: none;
}

.form-control.error + .error-message {
    display: block;
}