您可以执行以下操作：
在<header>标签中创建3个标签，然后使用flexbox。
例如：

header {
  display:flex;
  justify-content: space-between;
}

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现在它应该工作！

这是我的方法（如果你有任何问题，请随时提问！）：

/* Bright Colors are for debug !!! */

/* Setting font and variable that will be used everywhere */
:root {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  --dev-color: #5faedb;
}

/* Making sure the page cannot scroll left to right, only top to bottom */
body {
  overflow-x: hidden;
  overflow-y: auto;
}

/* Styling the navigation bar to contain 3 elements, .branding, .links, and .auth, */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-direction: row;
  width: 100%;
  height: 50px;
  top: 0;
  left: 0;
  background: var(--dev-color);
  position: fixed;
}

/* Styling container where logo is stored and styled */
.nav>.branding {
  margin: 0 0 0 20px;
  height: 100%;
}

.nav>.branding>a,
.nav>.branding>a>img {
  display: flex;
  align-items: center;
  justify-content: center;
  width: auto;
  height: 100%;
}

/* Un-Ordered list of links ( Navigation ) */
.nav>.links {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: row;
  list-style: none;
  margin: 0 10px 0 10px;
  padding: 0;
  height: 100%;
}

.nav>.links>li {
  margin: 10px;
}

.nav>.links>li>a {
  font-weight: 600;
  color: white;
  text-decoration: none;
  position: relative;
}

.nav>.links>li>a::after {
  content: "";
  width: 100%;
  height: 1px;
  left: 0;
  bottom: -5px;
  transform: scaleX(0);
  background: white;
  position: absolute;
}

.nav>.links>li>a:hover::after {
  transform: scaleX(1);
}

/* Authentication links ( Usually Sign in and Sign up ) */
.nav>.auth {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 10px 0 0;
  height: 100%;
  font-weight: 600;
}

.nav>.auth>a {
  color: white;
  padding: 10px 20px;
  background: rgba(255, 255, 255, 0.5);
  border-radius: 20px;
  text-decoration: none;
}

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