鼠标悬停时的透明文本

Question

.header {
    background-image: url(https://wallbox.ru/resize/640x480/wallpapers/main2/201717/art-ogni-kosmos-zvezdy-uzory-tumannost-rossyp-mercanie.jpg);
    height: 100vh;
}
.header__btn {
    border: 1px solid #fff;
    border-radius: 3px;
    padding: 6px 28px;
    text-transform: uppercase;
    color: #fff;
    background-color: transparent;
    transition: 0.5s all;
}

.header__btn:hover {
    color: transparent;
    background-color: #fff;
    transition: 0.5s all;
}

<header class="header">
  <button class="header__btn">buy</button>
</header>

如何在悬停时使文本透明？也尝试添加颜色：rgba (255, 255, 255, 0);但没有帮助

Answer 1

也许是这样的？与：

opcatiy: 0;

.header {
    background-image: url(https://wallbox.ru/resize/640x480/wallpapers/main2/201717/art-ogni-kosmos-zvezdy-uzory-tumannost-rossyp-mercanie.jpg);
    height: 100vh;
}
.header__btn {
    border: 1px solid #fff;
    border-radius: 3px;
    padding: 6px 28px;
    text-transform: uppercase;
    color: #fff;
    background-color: transparent;
    transition: 0.5s all;
}

.header__btn:hover {
    opacity: 0;
    background-color: #fff;
    transition: 0.5s all;
}

<header class="header">
  <button class="header__btn">buy</button>
</header>