/* === Reset === */
* {
  margin: 0;
  padding: 0;
  border: 0;
  box-sizing: border-box;
}
li {
  list-style: none;
  transition-duration: .3s;
}
li:hover {
  transform: scale(0.98);
}
a {
  text-decoration: none;
}
:focus {
  outline: 0;
}
/* === 全域樣式 === */ :root {
  --title: #6B2C12;
  --font: #433324;
  --book-font: #7E4F21;
}
html {
  font-family: Verdana, 'Noto Sans TC', "微軟正黑體", sans-serif;
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  background-color: #f4f3e4;
}
body {
  margin: auto;
  max-width: 1920px;
}
/* === Navbar 固定欄 === */
.castle-navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: url("../images/bg_04.jpg") top center repeat;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}
.castle-navbar .container {
  position: relative;
  max-width: 1200px;
  height: 80px;
  margin: 0 auto;
  padding: 0 16px;
}
/* logo 區塊 */
.castle-navbar .logo {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
}
.castle-navbar .logo img {
  height: 50px;
  max-width: 15vw;
  width: auto;
  object-fit: contain;
  display: block;
}
/* icon 區塊 */
.castle-navbar .nav-icons {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  gap: 18px;
}
.castle-navbar .nav-icons a img {
  width: 16vw;
  max-width: 100px;
  height: auto;
  display: block;
}
/* navbar 空間補足 */
.navbar-spacer {
  height: 80px;
}
/* === RWD 手機版調整 === */
@media (max-width: 768px) {
  html {
    scroll-padding-top: 60px;
  }
  html {
    font-size: 14px;
  }
  .castle-navbar .container {
    max-width: 100%;
    padding: 0 4px;
    height: 70px;
  }
  .castle-navbar .logo {
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
  }
  .castle-navbar .logo img {
    height: 50px;
    max-width: 20vw;
  }
  .castle-navbar .nav-icons {
    left: 45%;
    top: 50%;
    transform: translateY(-50%);
    gap: 4px;
  }
  .navbar-spacer {
    height: 70px;
  }
}
@media (max-width: 640px) {
  .castle-navbar .container {
    max-width: 100%;
    padding: 0 4px;
    height: 60px;
  }
  .castle-navbar .logo {
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
  }
  .castle-navbar .nav-icons {
    left: auto;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    gap: 4px;
  }
}
/* === Footer === */
.site-footer {
  background-color: #333;
  color: #fff;
  font-size: 12px;
  line-height: 1.6;
  text-align: center;
  padding: 15px 10px;
}
@media (max-width: 767px) {
  .site-footer {
    font-size: 9px;
  }
}