html,
body {
  margin: 0;
  padding: 0;

  background-color: #343a40;
  box-sizing: border-box;
}

img {
  display: block;
}

/* 头部👇 */
header {
  background-color: #343a40;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
  padding: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;

  position: sticky;
  top: 0;
  z-index: 100;
}

header .logo {
  display: block;
  height: 50px;

  /* 图片颜色反转 */
  filter: invert(1);

  cursor: pointer;
  transition: transform 0.2s ease-in-out;
}

/* 鼠标悬浮高亮 */
header .logo:hover {
  /* 缩放动画 */
  transform: scale(1.1);
}
header .title {
  color: #fff;
  font-size: larger;
}

/* 底部👇 */

footer {
  background-color: #343a40;
  box-shadow: 0 -2px 4px rgba(0, 0, 0, 0.2);
  padding: 16px;

  /* position: sticky;
  bottom: 0;
  z-index: 100; */

  display: flex;
  flex-direction: column;
  align-items: center;
}

footer .logo {
  display: block;
  width: 128px;
  cursor: pointer;
  transition: transform 0.2s ease-in-out;
}

/* 鼠标悬浮高亮 */
footer .logo:hover {
  /* 缩放动画 */
  transform: scale(1.1);
}

footer .contact {
  padding: 12px;

  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
}
footer .contact .wx {
  width: 128px;
}

footer .contact .item-box {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

footer .contact .item-box .item {
  display: flex;
  flex-direction: column;
}

footer .contact .item-box .item .label {
  color: #999;
}
footer .contact .item-box .item .value {
  color: #fff;
  font-size: large;
}

footer .copyright {
  color: #999;
  font-size: 14px;
}
footer .copyright a {
  color: #2184ee;
}