#baner_header {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    padding: 10px 20px;
    background-image: url(../images/bg_banner.jpg);
    background-color: #fff7e8;
    background-repeat: no-repeat;
    background-position: right center;
    background-size: cover;
    min-height: 80px;        /* 不要使用固定 height */
    overflow: visible;       /* 避免内容被裁剪 */
}

.header-left {
    flex-shrink: 0;
}

.header-left img {
    height: 60px;            /* 或 max-height: 100%; */
    width: auto;
    display: block;
    object-fit: contain;
}

.title_kbnn {
    margin-left: 10px;
    flex: 1;
}

.title_kbnn h1 {
    font-family: "Times New Roman", serif;
    font-size: 28px;
    color: red;
    text-shadow: 1px 1px #000;
    text-transform: uppercase;
    margin: 0;
}

.title_kbnn h3 {
    font-family: Arial, sans-serif;
    font-size: 15px;
    color: red;
    font-weight: 200;
    margin: 0;
}



@media (max-width: 480px) {
    .header-left img {
        height: 50px;
    }

    .title_kbnn h1 {
        font-size: 16px;
    }

    .title_kbnn h3 {
        font-size: 12px;
    }
}