/* ===== 導覽列（共用） ===== */
.navbar {
  font-family: "Chiron GoRound TC", "Noto Serif TC", serif;
  position: sticky;
  top: 0;
  z-index: 999;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}
.nav-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
}
.nav-logo {
  font-size: 16px;
  letter-spacing: 2px;
  color: #777;
}

.nav-links a {
  margin-left: 24px;
  text-decoration: none;
  font-size: 14px;
  color: #666;
  position: relative;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0%;
  height: 1px;
  background: #c9a063;
  transition: 0.3s;
}

.nav-links a:hover::after {
  width: 100%;
}
.navbar.scrolled {
  background: rgba(255, 255, 255, 0.5);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

/* ===== 漢堡選單 ===== */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  width: 22px;
  height: 2px;
  background: #555;
  transition: 0.3s;
}
.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.hamburger.active span:nth-child(2) {
  opacity: 0;
}
.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    flex-direction: column;
    padding: 16px 20px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  }
  .nav-links.open {
    display: flex;
  }
  .nav-links a {
    margin: 8px 0;
    margin-left: 0;
    font-size: 14px;
  }
}