实现炫酷CSS按钮动画：从左上到右下的边框颜色渐变效果

<div class="hover-effect-button-container-yellow">
   <div class="hover-effect-button-yellow"> 
      <a class="button" href="https://beedie.ca/industrial/">Learn More</a>
   </div>
</div>

.button {
    background: none;
    border: 0;
    box-sizing: border-box;
    padding: 0.9rem 2rem;
    box-shadow: inset 0 0 0 1px #fff; /* 初始白色边框效果 */
    color: #000000;
    text-transform: uppercase;
    font-family: "ff-meta-web-pro","Helvetica Neue",Helvetica,Roboto,Arial,sans-serif;
    font-weight: 400;
    letter-spacing: 0.025em;
    position: relative;
    vertical-align: middle;
    transition: color 0.25s;
    display: inline-block;
    text-decoration: none;
}

.button::before, .button::after {
    box-sizing: inherit;
    content: "";
    position: absolute;
    width: 0;
    height: 0;
    border: 1px solid transparent; /* 初始透明边框 */
}

.button::before {
    top: 0;
    left: 0;
}

.button::after {
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
}

.button:hover {
    outline-width: 0;
    text-decoration: none;
}

.button:hover::before {
    border-top-color: #0076b6;
    border-right-color: #0076b6;
    transition: width 0.25s ease-out, height 0.25s ease-out 0.25s;
}

.button:hover::before, .button:hover::after {
    width: 100%;
    height: 100%;
}

.button:hover::after {
    border-bottom-color: #0076b6;
    border-left-color: #0076b6;
    transition: height 0.25s ease-out, width 0.25s ease-out 0.25s;
}

/* 示例容器样式，非必要 */
.hover-effect-button-container-yellow {
    padding: 10px;
    background: pink;
}