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

body {
    font-family: 'Microsoft YaHei', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-container {
    display: flex;
    width: 900px;
    height: 500px;
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
}

.logo-section {
    flex: 1;
    background: linear-gradient(45deg, #4facfe 0%, #00f2fe 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
}

.logo-content {
    text-align: center;
    color: white;
}

.logo-image {
    width: 150px;
    height: 150px;
    margin-bottom: 20px;
}

.logo-content p {
    font-size: 1.1em;
    opacity: 0.9;
}

.login-section {
    flex: 1;
    padding: 50px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.welcome-text {
    text-align: center;
    margin-bottom: 40px;
}

.welcome-text h2 {
    color: #333;
    font-size: 1.8em;
    font-weight: 400;
    margin-bottom: 10px;
}

.welcome-text p {
    color: #666;
    font-size: 0.9em;
}

.input-group {
    position: relative;
    margin-bottom: 25px;
}

.input-group i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: #999;
    font-size: 18px;
}

.input-group input {
    width: 100%;
    padding: 15px 15px 15px 45px;
    border: 2px solid #e1e1e1;
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.input-group input:focus {
    outline: none;
    border-color: #4facfe;
}

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

.btn {
    flex: 1;
    padding: 15px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-teacher {
    background: linear-gradient(45deg, #667eea, #764ba2);
    color: white;
}

.btn-student {
    background: linear-gradient(45deg, #f093fb, #f5576c);
    color: white;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

/* 错误提示样式 */
.error-message {
    color: #e74c3c !important;
    font-size: 12px !important;
    margin-top: 5px !important;
    font-weight: 500;
}

/* 加载状态样式 */
.loading-spinner {
    animation: spin 1s linear infinite;
    margin-left: 8px;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none !important;
}

.status-message {
    text-align: center;
    margin-top: 15px;
    padding: 10px;
    border-radius: 5px;
    font-size: 14px;
}

.status-loading {
    background-color: #e3f2fd;
    color: #1976d2;
    border: 1px solid #bbdefb;
}

.status-success {
    background-color: #e8f5e8;
    color: #2e7d32;
    border: 1px solid #c8e6c9;
}

.status-error {
    background-color: #ffebee;
    color: #c62828;
    border: 1px solid #ffcdd2;
}

/* 备案信息样式 */
.page-footer {
    margin-top: 30px;
    text-align: center;
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
}

.footer-content p {
    margin: 0;
    padding: 10px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 5px;
    backdrop-filter: blur(5px);
}