* {
  margin:0;
  padding:0;
  box-sizing:border-box;
}
body {
  font-family: "Noto Sans", sans-serif;
  line-height:1.6;
}
.section {
  min-height: 100vh;
  padding: 60px 20px;
}
#home { background: #eef; }
#about { background: #efe; }
#services { background: #fee; }
#contact { background: #ffe; }

/* 右側浮動選單 */
#sidebar {
  position: fixed;
  top: 50%;
  right: 20px;
  transform: translateY(-50%);
  background: rgba(0,0,0,0.5);
  border-radius: 8px;
  z-index: 1000;
}
#sidebar ul {
  list-style: none;
}
#sidebar li + li {
  margin-top: 10px;
}
#sidebar a {
  display: block;
  padding: 10px 15px;
  color: #fff;
  text-decoration: none;
  transition: background .3s;
}
#sidebar a:hover,
#sidebar a.active {
  background: rgba(255,255,255,0.3);
}

/* 手機版選單 Toggle（可選） */
#menu-toggle {
  display: none;
  position: fixed;
  top: 20px; right: 20px;
  font-size: 24px;
  color: #333;
  z-index: 2000;
  cursor: pointer;
}
@media(max-width: 768px) {
  #sidebar {
    display: none;
    top: auto; bottom: 0;
    right: 0; left: 0;
    transform: none;
    background: #333;
    border-radius: 0;
  }
  #sidebar.open {
    display: block;
  }
  #menu-toggle {
    display: block;
  }
}