HTML CSS 边框线性渐变角

Question

您好，我在调整线性渐变边框时遇到问题。它看起来像这样：

我希望它看起来像这样 ^ 。 谁能帮忙。

.bot-right {
  position: relative;
  height:400px;
}
.bot-right:before, .bot-right:after {
  content: "";
  position: absolute;
  bottom: -3px;
  right: -40px;
  
}
.bot-right:before {
  top: -3px;
  width: 3px;
  background-image: -webkit-gradient(linear, 0 100%, 0 0, from(#009ee3), to(transparent));
  background-image: -webkit-linear-gradient(transparent, #009ee3);
  background-image: -moz-linear-gradient(transparent, #009ee3);
  background-image: -o-linear-gradient(transparent, #009ee3);
}
.bot-right:after {
  left: -3px;
  height: 3px;
  background-image: -webkit-gradient(linear, 0 0, 100% 0, from(#009ee3), to(transparent));
  background-image: -webkit-linear-gradient(right, #009ee3, transparent);
  background-image: -moz-linear-gradient(right, #009ee3, transparent);
  background-image: -o-linear-gradient(right, #009ee3, transparent);
}

<div class="bot-right "></div>

Answer 1

一个简单的边框图像，可以做到

.bot-right {
  position: relative;
  height:400px;
  border:3px solid;
  border-image: linear-gradient(90deg,transparent, #009ee3) 3;
}

<div class="bot-right "></div>