* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft Yahei", sans-serif;
}
body {
    background: #f4f6f8;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.login-box {
    width: 100%;
    max-width: 420px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.1);
    overflow: hidden;
}
.login-header {
    background: linear-gradient(135deg, #006633 0%, #008040 100%);
    padding: 30px 20px;
    text-align: center;
    color: #fff;
}
.login-header h1 {
    font-size: 24px;
    font-weight: 500;
    margin-bottom: 8px;
}
.login-header p {
    font-size: 14px;
    opacity: 0.9;
}
.login-form {
    padding: 30px 25px;
}
.form-item {
    margin-bottom: 20px;
}
.form-item label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    color: #333;
    font-weight: 500;
}
.form-item input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #e5e7eb;
    border-radius: 4px;
    font-size: 16px;
    transition: border-color 0.3s;
}
.form-item input:focus {
    outline: none;
    border-color: #006633;
}
.btn-submit {
    width: 100%;
    padding: 14px;
    background: #006633;
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.3s;
}
.btn-submit:hover {
    background: #004d26;
}
.msg-error {
    padding: 10px;
    background: #fef0f0;
    border: 1px solid #fde2e2;
    color: #f56c6c;
    border-radius: 4px;
    margin-bottom: 20px;
    font-size: 14px;
    text-align: center;
}

/* 手机端自适应 */
@media (max-width: 480px) {
    .login-box {
        max-width: 100%;
    }
    .login-header h1 {
        font-size: 20px;
    }
    .login-form {
        padding: 25px 20px;
    }
    .form-item input {
        padding: 14px 15px;
        font-size: 16px; /* 避免ios自动缩放 */
    }
    .btn-submit {
        padding: 16px;
        font-size: 17px;
    }
}