body {
  margin: 0;
  font-family: 'Poppins', sans-serif;
  background: linear-gradient(to right, #0f2027, #203a43, #2c5364);
  color: #f5f5f5;
  overflow-x: hidden;
}

canvas#bgCanvas {
  position: fixed;
  top: 0;
  left: 0;
  z-index: -1;
}

/* 🧭 導覽列 */
.navbar {
  box-shadow: 0 2px 10px rgba(0,0,0,0.5);
}

.navbar-brand {
  font-weight: bold;
  font-size: 1.5rem;
  color: #00d8ff!important;
}

.nav-link {
  color: #f5f5f5!important;
  transition: color 0.3s ease;
}

.nav-link:hover {
  color: #00d8ff!important;
}

/* 🎯 Hero 區塊 */
section.vh-100 {
  background: transparent;
  padding-top: 100px;
}

h1.display-4 {
  font-size: 3rem;
  font-weight: 700;
  color: #ffffff;
}

.lead {
  font-size: 1.2rem;
  color: #cccccc;
}

/* 🔘 按鈕樣式 */
.btn-primary {
  background-color: #00d8ff;
  border: none;
  padding: 12px 24px;
  font-weight: 600;
  transition: background-color 0.3s ease;
}

.btn-primary:hover {
  background-color: #009ecf;
}

/* 📦 區塊動畫容器 */
.intro {
  max-width: 800px;
  margin: auto;
  padding: 40px 20px;
}

/* 📱 響應式調整 */
@media (max-width: 768px) {
  h1.display-4 {
    font-size: 2.2rem;
}

.lead {
    font-size: 1rem;
}

.btn-primary {
    padding: 10px 20px;
}
}