* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Open Sans', sans-serif;
}

li {
  list-style: none;
}

a {
  text-decoration: none;
  color: #fff;
  font-size: 1rem;
}

a:hover {
  color: orange;
}

/* 导航栏 */
header {
  position: relative;
  padding: 0 2rem;
}

.navbar {
  width: 100%;
  height: 60px;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar .logo a {
  font-size: 1.5rem;
  font-weight: bold;
}

.navbar .links {
  display: flex;
  gap: 2rem;
}

.navbar .toggle_btn {
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
  display: none;
}



.action_btn {
  background-color: orange;
  color: #fff;
  padding: 0.5rem 1rem;
  border: none;
  outline: none;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: bold;
  cursor: pointer;
  transition: scale 0.2 ease;
}

.action_btn:hover {
  scale: 1.05;
  color: #fff;
}

.action_btn:active {
  scale: 0.95;
}




/* 下拉式菜单 */
.dropdown_menu {
  display: none;
  position: absolute;
  right: 2rem;
  top: 60px;
  height: 0;
  width: 300px;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(15px);
  border-radius: 10px;
  overflow: hidden;
  transition: height 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.dropdown_menu.open {
  height: 240px;
}


.dropdown_menu li {
  padding: 0.7rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.dropdown_menu .action_btn {
  width: 100%;
  display: flex;
  justify-content: center;
}