body, html {
    height: 100%;
    margin: 0;
    font-family: 'Roboto', sans-serif;
    background-color: #e6f3ff;
    overflow: hidden;
}

#particles-js {
    position: absolute;
    width: 100%;
    height: 100%;
    background-color: #e6f3ff;
}

.login-container {
    position: relative;
    z-index: 1;
    max-width: 400px;
    margin: 100px auto;
    padding: 30px;
    background-color: rgba(0, 86, 179, 0.1);
    border-radius: 15px;
    box-shadow: 0 0 30px rgba(0, 123, 255, 0.2);
    backdrop-filter: blur(10px);
}

.login-title {
    color: #0056b3;
    text-align: center;
    margin-bottom: 30px;
    font-weight: 700;
    font-size: 24px;
}

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

.form-control {
    width: 60%; /* 设置与验证码输入框相同的宽度 */
    border: none;
    border-bottom: 2px solid #0056b3;
    border-radius: 0;
    padding: 10px 5px;
    background-color: transparent;
    transition: all 0.3s ease;
    color: #0056b3;
}

    .form-control:focus {
        box-shadow: none;
        border-color: #007bff;
    }

.btn-login {
    background-color: #007bff;
    border: none;
    border-radius: 25px;
    padding: 12px 20px;
    color: white;
    font-weight: bold;
    transition: all 0.3s ease;
    width: 100%;
    font-size: 16px;
}

    .btn-login:hover {
        background-color: #0056b3;
        transform: translateY(-2px);
        box-shadow: 0 5px 15px rgba(0, 123, 255, 0.3);
    }

.input-icon {
    position: relative;
}

    .input-icon i {
        position: absolute;
        top: 12px;
        right: 10px;
        color: #0056b3;
    }

.captcha-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.captcha-input {
    width: 60%; /* 保持与其他输入框一致 */
}

.captcha-image {
    width: 35%;
    height: 40px;
    border-radius: 5px;
    cursor: pointer;
}

.copyright {
    position: absolute;
    bottom: 10px;
    left: 0;
    right: 0;
    text-align: center;
    color: #0056b3;
    font-size: 14px;
}