:root{
  --ir-maxw: 1080px;
  --ir-radius: 18px;
  --ir-shadow: 0 12px 30px rgba(0,0,0,.08);
}

/* =========================
   基本設定
   ========================= */
html{
  scroll-behavior: smooth;
}

body{
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans TC",
               Arial, "PingFang TC", "Microsoft JhengHei", sans-serif;
  display: flex;          /* 整頁上下排列：上 navbar / hero，中 iframe，下 footer */
  flex-direction: column;
}

/* layout container */
.ir-container{
  max-width: var(--ir-maxw);
}

/* =========================
   HERO 區塊
   ========================= */
.ir-hero{
  border-radius: var(--ir-radius);
  box-shadow: var(--ir-shadow);
  background:
    radial-gradient(1200px 600px at 10% 0%, rgba(13,110,253,.18), transparent 55%),
    radial-gradient(900px 500px at 90% 20%, rgba(32,201,151,.16), transparent 50%),
    linear-gradient(180deg, rgba(255,255,255,.95), rgba(255,255,255,.92));
  padding: 0.25rem 0.75rem;      /* 壓縮 hero 上下留白 */
}

/* hero 內標題 / 副標 */
.ir-hero h1{
  font-size: clamp(1.2rem, 1.6vw, 1.45rem);
  line-height: 1.25;
  margin: 0 0 .15rem;
}

.ir-hero .ir-muted{
  font-size: .95rem;
  margin: .05rem 0 0;
}

/* hero 右側卡片（快速入口） */
.ir-hero .ir-card{
  padding: .45rem .6rem;
}

.ir-hero .ir-card .btn{
  padding: .25rem .5rem;
  font-size: .82rem;
  line-height: 1.1;
}

/* 專注閱讀按鈕永不換行 */
#btnFocus{
  white-space: nowrap !important;
  max-width: none !important;
}

/* 桌機時稍微放寬一點字級，但仍保持扁平 */
@media (min-width: 992px){
  .ir-hero{
    padding-top: 0.25rem;
    padding-bottom: 0.25rem;
  }
  .ir-hero h1{
    font-size: clamp(1.25rem, 2vw, 1.7rem);
    line-height: 1.2;
  }
  .ir-hero .ir-card{
    padding: .6rem .8rem;
  }
}

/* 視窗高度比較矮時：再壓縮 hero 高度，必要時隱藏副標 */
@media (max-height: 800px){
  .ir-hero{
    padding-top: 0.2rem;
    padding-bottom: 0.2rem;
  }
}
@media (max-height: 700px){
  .ir-hero{
    padding-top: 0.15rem;
    padding-bottom: 0.15rem;
  }
  .ir-hero .ir-muted{
    display: none;       /* 高度真的不夠時，只留主標題＋右側按鈕 */
  }
}

/* hero 內卡片 / 標籤 / 說明色彩 */
.ir-card{
  border: 1px solid rgba(0,0,0,.06);
  border-radius: 16px;
  box-shadow: 0 6px 18px rgba(0,0,0,.06);
}

.ir-muted{
  color: rgba(0,0,0,.65);
}

.ir-badge{
  font-size: .85rem;
  padding: .35rem .6rem;
  border-radius: 999px;
  border: 1px solid rgba(0,0,0,.08);
  background: rgba(255,255,255,.7);
}

/* 手機：隱藏右側快速入口卡片 */
@media (max-width: 575.98px){
  .ir-hero-card{
    display: none !important;
  }
}

/* =========================
   主內容結構（navbar 下面到 footer 上面）
   ========================= */
.ir-main{
  flex: 1;                /* 撐滿 navbar 下方到 footer 上方 */
  display: flex;
  padding-top: .25rem;
  padding-bottom: 0;
}

.ir-main-inner{
  max-width: var(--ir-maxw);
  flex: 1;
  display: flex;
  flex-direction: column;
  padding-bottom: 0 !important;
  margin-bottom: 0 !important;
}

/* 工具列（專注閱讀提示） */
.ir-toolbar{
  margin: .15rem 0 .10rem;
  padding: 0;
  line-height: 1.1;
}

.ir-toolbar .ir-muted{
  font-size: .75rem;
  line-height: 1.1;
  margin: 0;
}

/* iframe 外框 */
.ir-frame-wrap{
  margin: 0 0 .25rem;
}

/* iframe 本體 */
.ir-iframe{
  width: 100%;
  border: 1px solid rgba(0,0,0,.08);
  border-radius: 16px;
  box-shadow: var(--ir-shadow);
  background: #fff;
  display: block;
  height: 50vh;        /* 桌機：約半螢幕高 */
  min-height: 280px;
  overflow: auto;
}

/* 內容 iframe 的「至少高度」（如果被當作 ir-main-frame 用） */
.ir-main-frame{
  min-height: 60vh;
}

/* 手機：給 iframe 更多高度 */
@media (max-width: 575.98px){
  .ir-hero{ border-radius: 16px; }
  .ir-iframe{
    border-radius: 14px;
    height: 70vh;
  }
}

/* =========================
   內容頁（iframe 裡載入的 use/、sample/ 等）
   ========================= */
.ir-page{
  max-width: 980px;
  margin: 0 auto;
  padding: 10px 18px 32px;   /* 上方改 10px，讓「最新消息」靠上 */
}

/* 標題區塊距離：h1 → hr → 第一段文字 */
.ir-page h1{
  margin: 2px 0 6px;
  padding: 0;
  font-size: 1.6rem;
  line-height: 1.25;
}
.ir-page h2{
  font-size: 1.25rem;
  margin-top: 22px;
}

.ir-page hr{
  height: 0;
  margin: 6px 0 10px;
  border: none;
  border-top: 1px solid #fff;
  opacity: 1;
}

/* 第一段文字不要再被多推下去 */
.ir-page p:first-of-type{
  margin-top: 0;
}

/* 段落 / 列表 */
.ir-page p{
  text-indent: 2em;
  line-height: 1.75;
  color: rgba(0,0,0,.82);
  font-size: 1.05rem;
}
.ir-page li{
  line-height: 1.75;
  color: rgba(0,0,0,.82);
  font-size: 1.05rem;
}

/* 引導段落（ir-lead）不縮排、稍淡 */
.ir-page .ir-lead{
  font-size: 1.05rem;
  color: rgba(0,0,0,.70);
  text-indent: 0;
}

/* 表格（一般版） */
.ir-table{
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border-radius: 14px;
  border: 1px solid rgba(0,0,0,.08);
}
.ir-table th,
.ir-table td{
  padding: 10px 12px;
  border-bottom: 1px solid rgba(0,0,0,.06);
  text-align: left;
  vertical-align: top;
}
.ir-table thead th{
  background: rgba(0,0,0,.03);
  font-weight: 650;
}
.ir-table tr:last-child td{
  border-bottom: 0;
}
.ir-scroll-x{
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* InfoRec 說明頁表格框線（黑底版） */
.ir-page table{
  width: 100%;
  border-collapse: collapse;
  margin: 1.2rem 0;
  font-size: .95rem;
}
.ir-page table th,
.ir-page table td{
  background: #000;
  color: #fff;
  border: 1px solid rgba(255,255,255,.25);
  padding: .45rem .6rem;
}
.ir-page table th{
  font-weight: 600;
}

/* 標題型小區塊 */
.sub-title{
  font-weight: 650;
  font-size: 1.05rem;
  margin: .4rem 0 .4rem;
}
h2.sub{
  font-weight: 650;
  font-size: 1.18rem;
  margin: 1.1rem 0 .5rem;
  color: #ddd;
}
.tbl-head{
  background: #000;
  color: #fff;
  font-size: .97rem;
  font-weight: 600;
  padding: .45rem .6rem;
  border-radius: 4px 4px 0 0;
  margin: 1.2rem 0 .1rem;
}

/* 大綱 / 清單樣式（國際版） */
.ol-l1{
  list-style-type: decimal;
  margin: .6rem 0 .8rem 1.6rem;
}
.ol-l2{
  list-style-type: lower-alpha;
  margin: .4rem 0 .7rem 2.2rem;
}
.ol-l3{
  list-style-type: lower-roman;
  margin: .3rem 0 .6rem 2.8rem;
}
.ul-l1{
  list-style-type: disc;
  margin: .4rem 0 .6rem 1.6rem;
}
.ul-l2{
  list-style-type: circle;
  margin: .3rem 0 .5rem 2rem;
}

/* 內容頁單獨開啟時，允許垂直捲動 */
body.ir-page{
  overflow-y: auto;
}

/* 內容頁圖片不超出寬度 */
.ir-page img,
.ir-page figure img,
.ir-page img.winimg{
  max-width: 100%;
  height: auto;
}

/* FIN 分頁導覽（深色背景高對比版） */
.ir-pager{
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
  align-items: center;
  margin: .75rem 0 1rem;
}

/* 一般頁碼 */
.ir-page-link{
  padding: .3rem .7rem;
  border-radius: .375rem;
  text-decoration: none;
  font-size: .9rem;
  line-height: 1.2;
  color: #ffffff;
  background: rgba(255,255,255,.18);
  border: 1px solid rgba(255,255,255,.35);
}
.ir-page-link:hover{
  background: rgba(255,255,255,.32);
  color: #ffffff;
}
.ir-page-link.is-active,
.ir-page-link[aria-current="page"]{
  background: #0d6efd;
  border-color: #0d6efd;
  color: #ffffff;
  font-weight: 600;
}
.ir-page-link.is-nav{
  background: rgba(0,0,0,.45);
  border-color: rgba(255,255,255,.45);
  font-weight: 600;
}
.ir-page-link.is-nav:hover{
  background: rgba(0,0,0,.65);
}
.ir-page-spacer{
  flex: 1 1 auto;
}

/* 文件索引清單：緊湊模式 */
.ir-page .ol-l1{
  margin: .5rem 0 .75rem;
  padding-left: 1.2rem;
}
.ir-page .ol-l1 li{
  margin: .15rem 0;
  line-height: 1.35;
}
.ir-page .ol-l1 a{
  text-decoration: none;
}
.ir-page .ol-l1 a:hover{
  text-decoration: underline;
}

/* 回首頁提示區塊 */
.ir-outside-note{
  font-size: .88rem;
  margin: 4px 0 10px;
  padding: 4px 8px;
  background: rgba(0,0,0,.04);
  border-radius: 4px;
  line-height: 1.3;
}
.ir-outside-note a{
  margin-left: 4px;
}

/* =========================
   專注閱讀模式（只藏 hero / footer）
   ========================= */
body.ir-focus #heroBlock{
  display: none !important;
}
body.ir-focus #footerBlock{
  display: none !important;
}

/* =========================
   Footer：貼底、一行
   ========================= */
#footerBlock{
  padding-top: 0 !important;
  padding-bottom: 0 !important;
  margin-top: auto !important;
  margin-bottom: 0 !important;
  line-height: 1 !important;
  font-size: 0.9rem !important;
  height: 1.4rem;
  display: flex;
  justify-content: center;
  align-items: center;
  border: none !important;
}
#footerBlock a{
  line-height: 1 !important;
  padding: 0 !important;
  margin: 0 .3rem !important;
  font-size: 0.9rem !important;
}

/* =========================
   Dark mode（跟隨系統）
   ========================= */
@media (prefers-color-scheme: dark){

  body,
  html,
  body.bg-body-tertiary{
    background:
      radial-gradient(900px 500px at 15% 0%, rgba(56,139,253,.12), transparent 55%),
      radial-gradient(900px 500px at 85% 10%, rgba(46,160,67,.10), transparent 55%),
      #0f1115 !important;
    color: #e6e8ee !important;
  }

  /* Navbar */
  .navbar{
    background-color: #11141a !important;
    border-bottom-color: rgba(255,255,255,.10) !important;
  }
  .navbar .navbar-brand,
  .navbar .nav-link{
    color: rgba(230,232,238,.92) !important;
  }
  .navbar .nav-link:hover,
  .navbar .nav-link:focus{
    color: #ffffff !important;
  }
  .navbar .dropdown-menu{
    background-color: #141821 !important;
    border-color: rgba(255,255,255,.10) !important;
  }
  .navbar .dropdown-item{
    color: rgba(230,232,238,.90) !important;
  }
  .navbar .dropdown-item:hover{
    background-color: rgba(255,255,255,.08) !important;
    color: #fff !important;
  }

  /* Hero */
  .ir-hero{
    background:
      radial-gradient(1200px 600px at 10% 0%, rgba(56,139,253,.18), transparent 55%),
      radial-gradient(900px 500px at 90% 20%, rgba(46,160,67,.16), transparent 50%),
      linear-gradient(180deg, #161a22, #141821) !important;
    color: #eef1f7;
  }
  .ir-muted{
    color: rgba(230,232,238,.75) !important;
  }

  /* Cards / list */
  .ir-card,
  .card,
  .list-group-item{
    background-color: #161a22 !important;
    border-color: rgba(255,255,255,.10) !important;
    color: rgba(230,232,238,.92) !important;
    box-shadow: 0 8px 24px rgba(0,0,0,.6);
  }

  /* iframe */
  .ir-iframe{
    background-color: #0f1115 !important;
    border-color: rgba(255,255,255,.10) !important;
  }

  /* Footer */
  .ir-footer{
    color: rgba(230,232,238,.65);
  }

  /* Buttons */
  .btn-outline-secondary,
  .btn-outline-light{
    color: #eef1f7 !important;
    border-color: rgba(255,255,255,.40) !important;
    background: rgba(255,255,255,.06) !important;
  }
  .btn-outline-secondary:hover,
  .btn-outline-light:hover{
    background: rgba(255,255,255,.12) !important;
    color: #ffffff  !important;
  }
  .btn-light{
    background: rgba(255,255,255,.10) !important;
    border-color: rgba(255,255,255,.18) !important;
    color: #ffffff !important;
  }
  .btn-light:hover{
    background: rgba(255,255,255,.16) !important;
  }

  .ir-badge{
    background: rgba(255,255,255,.10) !important;
    border-color: rgba(255,255,255,.18) !important;
    color: rgba(255,255,255,.92) !important;
  }

  /* 內容頁文字 / 表格 */
  .ir-page,
  .ir-page p,
  .ir-page li,
  .ir-page h1,
  .ir-page h2,
  .ir-page h3,
  .ir-page .ir-lead{
    color: rgba(230,232,238,.92) !important;
  }
  .ir-table{
    border-color: rgba(255,255,255,.10) !important;
  }
  .ir-table thead th{
    background: rgba(255,255,255,.06) !important;
    color: rgba(230,232,238,.92) !important;
  }
  .ir-table td,
  .ir-table th{
    border-bottom-color: rgba(255,255,255,.08) !important;
    color: rgba(230,232,238,.90) !important;
  }

  /* 連結顏色 */
  a{
    color: #79b8ff !important;
  }
  a:hover{
    color: #a7d0ff !important;
  }
}

/* =========================
   手動指定主題（可選）
   ========================= */
body.theme-dark{
  background-color: #0f1115;
  color: #e6e8ee;
}
body.theme-light{
  background-color: #f6f7fb;
  color: #111;
}