/* 全局重置 兼容IE8 */
*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html, body {
    height: 100%;
    background: #222938;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: "Microsoft YaHei", Arial, sans-serif;
}
/* 登录卡片容器 */
.login-card {
    width: 100%;
    max-width: 450px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 22px rgba(0,0,0,0.25);
    overflow: hidden;
}
/* 头部标题栏 */
.login-header {
    background: #1967d2;
    padding: 24px 16px;
    text-align: center;
}
.login-header h4 {
    font-size: 20px;
    color: #ffffff;
    font-weight: normal;
}
/* 表单主体区域 */
.login-body {
    padding: 30px 26px;
}
/* 输入框外层容器 */
.input-box {
    display: flex;
    align-items: center;
    border: 1px solid #d0d7e3;
    border-radius: 8px;
    margin-bottom: 18px;
    overflow: hidden;
}
/* 左侧图标区域 */
.input-icon {
    width: 46px;
    height: 46px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f3f4f6;
    font-size: 16px;
    color: #666;
}
/* 输入框通用样式 */
.input-text {
    flex: 1;
    height: 46px;
    border: none;
    outline: none;
    padding: 0 12px;
    font-size: 14px;
    color: #222;
}
.input-text[readonly] {
    background: #f8f9fa;
    color: #666;
}
.input-text::placeholder {
    color: #a0a8b6;
}
/* 错误提示文字 */
.error {
    color: #e53935;
    font-size: 13px;
    margin: -12px 0 14px 4px;
    display: block;
}
/* 登录提交按钮 */
.login-submit {
    width: 100%;
    height: 48px;
    border: none;
    border-radius: 8px;
    background: #1967d2;
    color: #fff;
    font-size: 16px;
    cursor: pointer;
    margin-top: 6px;
}
.login-submit:active {
    background: #1558b6;
}
/* 底部浏览器兼容提示 */
.bottom-tip {
    position: fixed;
    bottom: 16px;
    width: 100%;
    text-align: center;
    font-size: 12px;
    color: #ffffff;
}