body {
    font-family: 'Open Sans', Arial, sans-serif;
    background-image: linear-gradient(120deg, #fdfbfb 0%, #ebedee 100%);
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.login-container {
    background: #fff;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    width: 350px;
    max-width: 90%;
}

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

.input-group label {
    display: block;
    margin-bottom: 5px;
    color: #333;
}

.input-group input[type="text"],
.input-group input[type="password"] {
    width: 100%;
    padding: 12px;
    margin: 8px 0;
    border: 1px solid #ccc;
    border-radius: 5px;
    box-sizing: border-box;
}

button {
    width: 100%;
    padding: 12px;
    border: none;
    background: #5cb85c;
    color: white;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    transition: background 0.3s ease;
}

button:hover {
    background: #4cae4c;
}

h2 {
    text-align: center;
    color: #333;
    margin-bottom: 30px;
}

/* 添加一些动态效果 */
.login-container {
    animation: showUp 0.5s cubic-bezier(0.18, 1.3, 1, 1) forwards;
}

@keyframes showUp {
    0% {
        transform: scale(0.8);
        opacity: 0;
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}