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

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    background: linear-gradient(135deg, #e0f2f1 0%, #b2dfdb 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-container {
    width: 100%;
    max-width: 1000px;
}

.login-card {
    display: flex;
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.login-left {
    flex: 1;
    background: linear-gradient(135deg, #4fc3f7 0%, #1976d2 100%);
    padding: 60px 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.login-left::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="2" fill="rgba(255,255,255,0.1)"/></svg>') repeat;
    animation: float 20s infinite linear;
}

@keyframes float {
    0% { transform: translate(0, 0) rotate(0deg); }
    100% { transform: translate(-50px, -50px) rotate(360deg); }
}

.promo-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: white;
}

.promo-title {
    font-size: 32px;
    font-weight: bold;
    margin-bottom: 20px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.promo-subtitle {
    font-size: 18px;
    line-height: 1.6;
    opacity: 0.95;
    margin-bottom: 40px;
}

.promo-image {
    opacity: 0.3;
    margin-top: 40px;
}

.login-right {
    flex: 1;
    padding: 60px 50px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.login-title {
    font-size: 28px;
    color: #1976d2;
    margin-bottom: 40px;
    font-weight: 600;
}

.alert {
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 20px;
    font-size: 14px;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.login-form {
    width: 100%;
}

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

.form-icon {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: #1976d2;
    font-size: 16px;
}

.form-group input {
    width: 100%;
    padding: 14px 14px 14px 45px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 15px;
    transition: border-color 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: #1976d2;
    box-shadow: 0 0 0 3px rgba(25, 118, 210, 0.1);
}

.checkbox-group {
    display: flex;
    align-items: center;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-size: 14px;
    color: #666;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
    margin-right: 8px;
    cursor: pointer;
}

.login-btn {
    width: 100%;
    padding: 14px;
    background-color: #1976d2;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s;
    margin-top: 10px;
}

.login-btn:hover {
    background-color: #1565c0;
}

.login-hint {
    margin-top: 30px;
    padding: 15px;
    background-color: #f5f5f5;
    border-radius: 6px;
    font-size: 13px;
    color: #666;
}

.login-hint p {
    margin: 5px 0;
}

@media (max-width: 768px) {
    .login-card {
        flex-direction: column;
    }
    
    .login-left {
        padding: 40px 30px;
    }
    
    .login-right {
        padding: 40px 30px;
    }
}