/* 前台結構性 CSS（排版機制本身，不含顏色/字體等視覺樣式——那些由後台版面管理逐站設定，注入成每頁的內嵌 <style>） */

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; margin: 0; padding: 0; }

/* 廣告區塊：左/右/下區塊各自可以放多組群組，每組底下是廣告圖清單 */
.ad-group { margin-bottom: 16px; }
.ad-group:last-child { margin-bottom: 0; }
.ad-group-name { font-weight: bold; margin-bottom: 8px; }
.ad-item { margin-bottom: 12px; }
.ad-item:last-child { margin-bottom: 0; }
.ad-item img { max-width: 100%; height: auto; }
.ad-caption { font-size: 12px; margin-top: 4px; }

/* 橫幅輪播：只有一張時純顯示圖片(不出箭頭/圓點)，多張時用 active class 切換顯示，JS 控制自動輪播/箭頭/圓點。
   切換動畫效果(admin/banner/index.php選)：none=直接切換／fade=淡入淡出／zoom=縮放淡入／slide=左右滑動 */
.site-banner { position: relative; overflow: hidden; }
.site-banner-slide img { width: 100%; height: auto; display: block; }

/* none：跟最初做法一樣直接開關display，容器高度自動跟著圖片走 */
.site-banner--none .site-banner-slide { display: none; }
.site-banner--none .site-banner-slide.active { display: block; }

/* fade/zoom/slide 三種都需要疊圖或位移(position:absolute)，沒辦法像none一樣用文件流量出高度，
   改成JS依「目前這張」圖片的原始比例即時算出容器高度(bannerFitHeight)，維持顯示原圖比例，
   不是寫死一個固定比例——要改高度請直接在版面設定CSS蓋 .site-banner-track{height:...} */
.site-banner--fade .site-banner-track,
.site-banner--zoom .site-banner-track,
.site-banner--slide .site-banner-track {
  position: relative;
}
.site-banner--fade .site-banner-slide,
.site-banner--zoom .site-banner-slide,
.site-banner--slide .site-banner-slide {
  position: absolute;
  inset: 0;
}
.site-banner--fade .site-banner-slide img,
.site-banner--zoom .site-banner-slide img,
.site-banner--slide .site-banner-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.site-banner--fade .site-banner-slide { opacity: 0; transition: opacity .6s ease; }
.site-banner--fade .site-banner-slide.active { opacity: 1; z-index: 1; }

.site-banner--zoom .site-banner-slide { opacity: 0; transform: scale(1.08); transition: opacity .6s ease, transform 1.2s ease; }
.site-banner--zoom .site-banner-slide.active { opacity: 1; transform: scale(1); z-index: 1; }

/* slide：位移由 JS 依目前索引直接算 translateX 套 inline style，全部維持opacity:1，
   進出場都要看得到才會像「滑出去/滑進來」，不能用active切opacity(那樣切換瞬間會直接消失、不是滑走) */
.site-banner--slide .site-banner-slide { transition: transform .6s ease; }
.site-banner--slide .site-banner-slide.active { z-index: 1; }

/* 左右箭頭／底部指示條的視覺參照 Bootstrap 4 carousel(getbootstrap.com/docs/4.0/components/carousel)：
   箭頭是貼在兩側、半透明的寬點擊區(不是小按鈕)，指示條是扁平長條不是圓點，兩者預設都用白色(疊在照片上要能看見) */
.site-banner-arrow {
  position: absolute;
  top: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 15%;
  background: none;
  border: none;
  color: #fff;
  padding: 0;
  margin: 0;
  cursor: pointer;
  opacity: .5;
  transition: opacity .15s ease;
  z-index: 2;
}
.site-banner-arrow:hover,
.site-banner-arrow:focus { opacity: .9; }
.site-banner-arrow svg { width: 24px; height: 24px; filter: drop-shadow(0 1px 2px rgba(0, 0, 0, .5)); }
.site-banner-prev { left: 0; }
.site-banner-next { right: 0; }

.site-banner-dots {
  position: absolute;
  z-index: 2;
  bottom: 12px;
  left: 0;
  right: 0;
  display: flex;
  justify-content: center;
  gap: 6px;
  padding: 0;
  margin: 0;
}
.site-banner-dot {
  width: 30px;
  height: 3px;
  padding: 0;
  border: none;
  border-radius: 0;
  background-color: rgba(255, 255, 255, .5);
  cursor: pointer;
  transition: background-color .15s ease;
}
.site-banner-dot.active { background-color: #fff; }

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
/* 頁首內容(block-content)預設是flex item，沒有寬度就會直接shrink-to-fit貼著內容縮到最小，
   這樣子元素就算設定 width+margin:0 auto 也沒有多餘空間可以置中(父層跟子層一樣寬)。
   撐滿剩餘空間後，子元素的 margin:auto 才有效果；漢堡按鈕本來就是固定寬度，不會被擠壓 */
.site-header-content { flex: 1 1 auto; min-width: 0; }

/* 漢堡按鈕：預設隱藏，平板+手機才顯示（見下方 max-width:1024px） */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  border: none;
  background: none;
  cursor: pointer;
  padding: 0;
}
.nav-hamburger span {
  width: 100%;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform .2s ease, opacity .2s ease;
}

/* 選單項目圖示：水平/垂直選單共用同一個class，預設給基本尺寸，實際大小/間距由後台版面設定的CSS決定 */
.nav-item-icon {
  display: inline-block;
  width: 1em;
  height: 1em;
  vertical-align: middle;
  margin-right: 0.4em;
}

/* 水平選單：桌機/平板為橫向排列，點擊展開 dropdown / mega menu */
.site-nav .nav-level-1 {
  display: flex;
  flex-wrap: wrap;
}
.site-nav .nav-level-1 > li {
  position: relative;
}

.nav-dropdown,
.nav-megamenu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 50;
}
.site-nav .nav-level-1 > li.open > .nav-dropdown,
.site-nav .nav-level-1 > li.open > .nav-megamenu {
  display: block;
}

.nav-megamenu .nav-level-2 {
  display: flex;
}
.nav-megamenu .nav-level-2 > li {
  flex: 1;
}

/* 平板：mega menu 收窄成一般 dropdown 排版，避免版面太擠 */
@media (max-width: 1024px) {
  .nav-megamenu .nav-level-2 {
    display: block;
  }
}

/* 平板+手機：水平選單併入漢堡選單，垂直堆疊；垂直選單也併入同一個收合選單（見下方 .site-nav-vnav），不在左區塊單獨顯示 */
@media (max-width: 1024px) {
  .nav-hamburger {
    display: flex;
  }
  .site-nav {
    display: none;
  }
  .site-nav.open {
    display: block;
  }
  .site-nav .nav-level-1 {
    flex-direction: column;
  }
  .nav-dropdown,
  .nav-megamenu {
    display: none;
    position: static;
  }
  .site-nav .nav-level-1 > li.open > .nav-dropdown,
  .site-nav .nav-level-1 > li.open > .nav-megamenu {
    display: block;
  }
  .nav-level-2,
  .nav-level-3plus {
    padding-left: 1em;
  }
}

/* 垂直選單：一般子選單原地 accordion 展開（不像水平選單浮動），mega 變體往右側飛出 */
.site-vnav .vnav-level-1 > li {
  position: relative;
}
.site-vnav .vnav-level-2,
.site-vnav .vnav-level-3plus {
  display: none;
}
.site-vnav li.open > .vnav-level-2,
.site-vnav li.open > .vnav-level-3plus {
  display: block;
}
.vnav-megamenu {
  display: none;
  position: absolute;
  top: 0;
  left: 100%;
  z-index: 50;
}
.site-vnav li.open > .vnav-megamenu {
  display: block;
}
.vnav-megamenu .vnav-level-2 {
  display: flex;
}
.vnav-megamenu .vnav-level-2 > li {
  flex: 1;
}

/* 垂直選單渲染兩份：左區塊那份只在桌機顯示，收合選單面板裡那份只在平板/手機顯示（併入漢堡選單，不是JS搬移DOM） */
.site-nav-vnav {
  display: none;
}
@media (max-width: 1024px) {
  .site-main-left > .site-vnav {
    display: none;
  }
  .site-nav-vnav {
    display: block;
  }
  /* 收合狀態下側邊飛出面板改成跟一般 dropdown 一樣原地往下展開 */
  .vnav-megamenu {
    position: static;
  }
  .vnav-megamenu .vnav-level-2 {
    display: block;
  }
}

/* 內容區塊之間的間距（圖文/清單/相簿/檔案下載/商品，依序排列時彼此留一點空隙） */
.content-block { margin-bottom: 24px; }
.content-block:last-child { margin-bottom: 0; }

/* 清單型區塊（文字訊息/圖文訊息/商品）共用的卡片 grid，欄數/欄距由後台逐區塊設定，經行內 <style> 覆蓋 grid-template-columns/gap */
.listing-grid { display: grid; grid-template-columns: 1fr; gap: 10px; }
.listing-card { display: block; color: inherit; background: #fff; border: 1px solid #e0e0e0; border-radius: 4px; overflow: hidden; }
.listing-card-image img { width: 100%; height: 200px; object-fit: cover; display: block; }
.listing-card-body { padding: 12px 14px; }
.listing-card-title { margin: 0 0 6px; font-size: 16px; color: #333; }
.listing-card-model { margin: 0 0 6px; font-size: 13px; color: #888; }
.listing-card-summary { margin: 0 0 6px; font-size: 13px; color: #666; line-height: 1.5; }
.listing-card-time { display: block; font-size: 12px; color: #999; }

/* 相簿 */
/* 每張圖片自己的寬/高/間距由後台逐區塊設定(桌面/平板/手機各自)，這裡的160px/10px只是還沒套用scoped樣式前的保險預設值 */
.gallery-grid { display: flex; flex-wrap: wrap; gap: 10px; }
.gallery-item { position: relative; display: block; width: 160px; border: 1px solid #e0e0e0; border-radius: 4px; overflow: hidden; }
.gallery-item img { width: 100%; height: 160px; object-fit: cover; display: block; }
.gallery-caption { display: block; padding: 6px 8px; font-size: 12px; color: #666; background: #fff; }

/* 檔案下載 */
.file-list { display: grid; grid-template-columns: 1fr; gap: 10px; list-style: none; margin: 0; padding: 0; }
.file-item-download { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 10px 14px; background: #fff; border: 1px solid #e0e0e0; border-radius: 4px; color: #333; }
.file-item-size { font-size: 12px; color: #999; flex-shrink: 0; }

/* 表單（目前只有顯示排版，送出功能還沒做） */
.site-form { display: flex; flex-wrap: wrap; }
.site-form-field { box-sizing: border-box; padding: 8px; }
.site-form-field label { display: block; margin-bottom: 6px; font-size: 14px; color: #333; }
.site-form-required { color: #c0392b; }
.site-form-field input, .site-form-field textarea, .site-form-field select { width: 100%; box-sizing: border-box; padding: 0 10px; font-family: inherit; }
.site-form-field textarea { padding: 8px 10px; resize: vertical; }
.site-form-options { display: flex; flex-wrap: wrap; gap: 4px 16px; }
.site-form-options label { display: flex; align-items: center; gap: 6px; margin: 0; }
.site-form-submit { flex: 0 0 auto; margin: 8px; padding: 10px 28px; background: #333; color: #fff; border: none; border-radius: 4px; cursor: pointer; font-size: 14px; align-self: flex-start; }

/* 訊息/商品詳情頁 */
.message-detail-title { margin: 0 0 12px; font-size: 24px; color: #333; }
.message-detail-cover img { width: 100%; max-height: 420px; object-fit: cover; display: block; border-radius: 4px; margin-bottom: 16px; }
.message-detail-attachments { margin-top: 20px; }
.product-detail-model { color: #888; margin: 0 0 12px; }
.product-detail-summary { color: #555; margin: 0 0 12px; }
.product-detail-description { color: #333; line-height: 1.7; margin: 0 0 16px; }

/* 主內容三欄：左區塊(通常放垂直選單)／內容區／右區塊，下區塊獨立一整排在footer之前 */
.site-main-wrap {
  display: flex;
}
.site-main {
  flex: 1;
  min-width: 0;
}
.site-main-left,
.site-main-right {
  flex: 0 0 auto;
}

@media (max-width: 1024px) {
  .site-main-wrap {
    flex-direction: column;
  }
}