/* =========================================================
   Random ID & Avatar Generator - Styles
   SEO/效能改動摘要：
   1) 將原本 inline CSS 抽出成可快取的外部檔案
   2) body 背景改為純色 #fff（降低 repaint 成本）
   3) 按鈕/輸入框加入 min-height:44px（符合行動端觸控建議）
   4) 新增內容行銷區塊（content-block / faq / 內部連結樣式）
   ========================================================= */

/* =========================================================
   Toolbox by Kohdy - Mobile-first（HTML+CSS+JS）
   - 不使用框架、不引用外部庫
   - SEO 友好、可無障碍使用
   ========================================================= */

:root{
  --bg:#ffffff;
  --bg-soft:#f8fafc;
  --text:#0f172a;
  --muted:#475569;
  --border:#e2e8f0;
  --primary:#2563eb;
  --primary-2:#1d4ed8;
  --focus: rgba(37,99,235,.18);
  --shadow: 0 8px 24px rgba(2,6,23,.08);
  --radius: 14px;
  --radius-sm: 10px;
  --max: 1120px;
}
*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font: 16px/1.5 system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  color:var(--text);
  background:#fff; /* SEO/效能：移除 fixed gradient */
}
a{ color:var(--primary); text-decoration:none; }
a:hover{ color:var(--primary-2); text-decoration:underline; }
.skip-link{
  position:absolute; left:-999px; top:auto; width:1px; height:1px; overflow:hidden;
}
.skip-link:focus{
  left:12px; top:12px; width:auto; height:auto; padding:10px 12px;
  background:#fff; border:1px solid var(--border); border-radius:12px; box-shadow:var(--shadow);
  z-index:1000;
}
.container{ max-width:var(--max); margin:0 auto; padding:0 16px; }
header{
  position:sticky; top:0; z-index:50;
  backdrop-filter:saturate(180%) blur(10px);
  background:rgba(255,255,255,.85);
  border-bottom:1px solid var(--border);
}
.nav{
  display:flex; align-items:center; justify-content:space-between;
  padding:12px 0;
  gap:12px;
}
.nav-left{ display:flex; align-items:center; gap:10px; }
.nav-mid{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:14px;
  flex:1;
  min-width:0;
}
.brand{
  display:flex; align-items:center; gap:10px;
  font-weight:800; letter-spacing:-.02em;
  color:var(--text);
  white-space:nowrap;
}
.logo{
  width:34px; height:34px; border-radius:10px;
  background:linear-gradient(135deg, var(--primary), #60a5fa);
  box-shadow:0 10px 18px rgba(37,99,235,.22);
  display:grid; place-items:center;
  color:#fff; font-weight:900;
  user-select:none;
}
.navlinks{ display:none; gap:14px; align-items:center; }
.navlinks a{ color:var(--muted); font-weight:600; }
.navlinks a:hover{ color:var(--text); text-decoration:none; }
.nav-cta{ display:flex; align-items:center; gap:10px; }

.dropdown{ position:relative; display:inline-flex; }
.dropdown-trigger{
  appearance:none;
  border:1px solid transparent;
  background:transparent;
  padding:8px 10px;
  border-radius:999px;
  cursor:pointer;
  min-height:44px;
  min-width:44px;
  font: inherit;
  font-weight:600;
  color:var(--muted);
}
.dropdown-trigger:hover{
  background:rgba(15,23,42,.04);
  border-color:rgba(148,163,184,.45);
  color:var(--text);
}
.dropdown-trigger:focus{ outline:none; }
.dropdown-trigger:focus-visible{ outline: 3px solid var(--focus); outline-offset:2px; }
.dropdown-caret{ margin-left:2px; font-size:12px; line-height:1; color:var(--muted); }

.dropdown-menu{
  position:absolute;
  top: calc(100% + 8px);
  left:0;
  width:max-content;
  max-width:240px;
  background:#fff;
  border:1px solid var(--border);
  border-radius:14px;
  box-shadow:var(--shadow);
  padding:6px;
  margin:0;
  list-style:none;
  opacity:0;
  transform: translateY(6px);
  pointer-events:none;
  visibility:hidden;
  transition: opacity 200ms ease, transform 200ms ease;
  z-index:100;
}
.dropdown.open .dropdown-menu{
  opacity:1;
  transform: translateY(0);
  pointer-events:auto;
  visibility:visible;
}

.dropdown-menu a[role="menuitem"]{
  display:flex;
  align-items:center;
  gap:10px;
  padding:10px 12px;
  border-radius:12px;
  color:var(--muted);
  font-weight:600;
  text-decoration:none;
  min-height:44px;
  font: inherit;
}
.dropdown-menu a[role="menuitem"]:hover{
  background:rgba(37,99,235,.08);
  color:var(--text);
  text-decoration:none;
}
.dropdown-menu a[role="menuitem"]:focus,
.dropdown-menu a[role="menuitem"]:focus-visible{
  outline:none;
  box-shadow:none;
}

@media (max-width: 768px){
  .dropdown-menu{
    position:fixed;
    top:68px;
    left:16px;
    right:16px;
    width:auto;
    max-width:none;
  }
}

.btn{
  appearance:none; border:1px solid var(--border);
  background:#fff; color:var(--text);
  padding:11px 14px; /* 觸控更友好 */
  border-radius:999px;
  font-weight:700; cursor:pointer;
  min-height:44px; /* 行動端建議 */
  min-width:44px;
}
.btn.primary{
  background:var(--primary);
  border-color:var(--primary);
  color:#fff;
}
.btn.primary:hover{ background:var(--primary-2); border-color:var(--primary-2); }
.btn:focus{ outline: 3px solid var(--focus); outline-offset:2px; }

/* 廣告區 */
.top-ad{ margin:14px 0 0; display:flex; justify-content:center; }
.top-ad .ad-728x90,
.top-ad ins.adsbygoogle{
  display:block;
  margin-left:auto;
  margin-right:auto;
}
.ad-slot{
  border:1px dashed #cbd5e1;
  background:linear-gradient(#fff, #f8fafc);
  color:#64748b;
  border-radius:12px;
  display:flex; align-items:center; justify-content:center;
  font-weight:700;
  user-select:none;
}
.ad-728x90{ width:min(728px, 100%); height:90px; }
.ad-300x250{ width:300px; height:250px; margin:24px auto 0; }
.ad-300x600{ width:300px; height:600px; }
.ad-note{ font-size:12px; font-weight:600; color:#94a3b8; margin-top:6px; text-align:center; }

main{ padding:22px 0 44px; }
.layout{
  display:grid;
  grid-template-columns: 1fr;
  gap:18px;
  align-items:start;
}
aside{ display:none; }
.hero{ padding:18px 0 6px; }
.hero-card{
  border:1px solid var(--border);
  background:linear-gradient(180deg, #ffffff, #f8fafc);
  border-radius:var(--radius);
  padding:18px;
  box-shadow: 0 1px 0 rgba(2,6,23,.03);
}
.hero h1{
  margin:0 0 8px;
  font-size: 28px;
  line-height:1.15;
  letter-spacing:-.03em;
}
.hero p{ margin:0; color:var(--muted); max-width: 70ch; }

.section-title{
  display:flex; align-items:flex-end; justify-content:space-between;
  gap:10px;
  margin:18px 0 10px;
}
.section-title h2{
  margin:0;
  font-size: 18px;
  letter-spacing:-.02em;
}
.section-title .hint{
  margin:0;
  color:var(--muted);
  font-size: 13px;
  font-weight:600;
}

.grid{
  display:grid;
  grid-template-columns: 1fr;
  gap:12px;
}
.panel{
  border:1px solid var(--border);
  border-radius:var(--radius);
  background:#fff;
  overflow:hidden;
}
.panel .ph{
  padding:10px 12px;
  border-bottom:1px solid var(--border);
  background: var(--bg-soft);
  display:flex; justify-content:space-between; align-items:center; gap:10px;
}
.panel .ph h3, .panel .ph h4{
  margin:0;
  font-size:13px;
  letter-spacing:-.01em;
}
.panel .pc{ padding:12px; }
.row{ display:flex; flex-wrap:wrap; gap:10px; align-items:center; }
.small{ font-size:12px; color:var(--muted); font-weight:600; }

.input{
  width: min(680px, 100%);
  flex: 1 1 240px;
  padding:12px 12px;
  border-radius:12px;
  border:1px solid var(--border);
  background:#fff;
  color:var(--text);
  min-height:44px; /* 行動端觸控 */
}
.input:focus{ outline: 3px solid var(--focus); border-color: rgba(37,99,235,.4); }

textarea{
  width:100%;
  min-height: 140px;
  resize: vertical;
  padding:12px;
  border-radius:12px;
  border:1px solid var(--border);
  font: 14px/1.5 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}
textarea:focus{ outline:3px solid var(--focus); border-color: rgba(37,99,235,.4); }

.notice{
  border:1px solid rgba(37,99,235,.25);
  background: rgba(37,99,235,.06);
  padding:10px 12px;
  border-radius:12px;
  color: #0b2a75;
  font-weight:700;
  font-size:13px;
}

.avatar-preview{
  display:flex; justify-content:center;
  padding:10px 0;
}
.avatar-preview img{
  width:160px; height:160px;
  border-radius:24px;
  border:1px solid var(--border);
  background:#fff;
  object-fit:cover;
}

/* =========================================================
   SEO：內容行銷區塊（可被爬蟲直接抓取）
   ========================================================= */
.content-block{
  border:1px solid var(--border);
  border-radius:var(--radius);
  background:#fff;
  padding:16px 14px;
  margin:14px 0 0;
}
.content-block h3{
  margin:0 0 8px;
  font-size:16px;
  letter-spacing:-.02em;
}
.content-block p{ margin:0 0 10px; color:var(--muted); }
.content-block ul{ margin:0 0 10px 20px; color:var(--muted); }
.content-block li{ margin:6px 0; }

.content-block.collapsible{
  padding:0;
  margin-top:16px;
}
.content-block.collapsible + .section-title{
  margin-top:24px;
  padding-top:24px;
  border-top:1px solid var(--border);
}
.content-block.collapsible .collapsible-heading{ margin:0; }
.content-block.collapsible .collapsible-trigger{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:16px 14px;
  background:transparent;
  border:0;
  cursor:pointer;
  text-align:left;
  color:var(--text);
  font-size:16px;
  font-weight:700;
  letter-spacing:-.02em;
}
.content-block.collapsible .collapsible-trigger:focus{ outline:none; }
.content-block.collapsible .collapsible-trigger:focus-visible{
  outline: 3px solid var(--focus);
  outline-offset:2px;
  border-radius:12px;
}
.content-block.collapsible .collapsible-title{ flex:1 1 auto; }
.content-block.collapsible .collapsible-indicator{
  flex:0 0 auto;
  width:18px;
  height:18px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  color:var(--muted);
}
.content-block.collapsible .collapsible-trigger[aria-expanded="false"] .collapsible-indicator::before{ content:"▶"; }
.content-block.collapsible .collapsible-trigger[aria-expanded="true"] .collapsible-indicator::before{ content:"▼"; }
.content-block.collapsible .collapsible-panel{
  max-height:0;
  overflow:hidden;
  transition: max-height 300ms ease;
  visibility:hidden;
}
.content-block.collapsible .collapsible-panel[data-state="expanded"]{ visibility:visible; }
.content-block.collapsible .collapsible-panel-inner{ padding:0 14px 14px; }

.you-may-like{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:10px;
}
.pill-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 12px;
  border:1px solid var(--border);
  border-radius:999px;
  min-height:44px;
  font-weight:700;
  color:var(--text);
  background: #fff;
}
.pill-link:hover{
  border-color: rgba(37,99,235,.35);
  text-decoration:none;
}

.faq{
  margin-top:12px;
  border-top:1px solid var(--border);
  padding-top:12px;
}
.faq details{
  border:1px solid var(--border);
  border-radius:12px;
  padding:10px 12px;
  background: var(--bg-soft);
  margin:8px 0;
}
.faq summary{
  cursor:pointer;
  font-weight:800;
  color:var(--text);
}
.faq p{ margin:8px 0 0; color:var(--muted); }

footer{
  border-top:1px solid var(--border);
  padding:20px 0;
  background: #fff;
}
.foot{
  display:flex; flex-direction:column; gap:12px;
  color:var(--muted);
  font-weight:600;
}
.foot-links{ display:flex; gap:12px; flex-wrap:wrap; }
.foot small{ color:#64748b; }
.foot small a{
  color:inherit;
  text-decoration:none;
  font-weight:700;
}
.foot small a:hover{
  color:var(--text);
  text-decoration:underline;
}

.legal-page main{ padding:26px 0 54px; }
.legal-card{
  border:1px solid var(--border);
  border-radius:var(--radius);
  background:#fff;
  padding:20px 18px;
  box-shadow: 0 1px 0 rgba(2,6,23,.03);
  max-width: 860px;
}
.legal-card h1{
  margin:0 0 10px;
  font-size: 28px;
  line-height:1.15;
  letter-spacing:-.03em;
}
.legal-card h2{
  margin:20px 0 8px;
  font-size:16px;
  letter-spacing:-.02em;
  color:var(--text);
}
.legal-card p{
  margin:0 0 12px;
  color:var(--muted);
  max-width: 80ch;
}
.legal-card ul{
  margin:0 0 12px 18px;
  padding:0;
  color:var(--muted);
}
.legal-card li{ margin:6px 0; }
.legal-card strong{ color:var(--text); }
.legal-card p:last-child{ margin-bottom:0; }
.legal-meta{
  color:#64748b;
  font-weight:700;
  font-size:13px;
  margin:0 0 18px;
}

@media (min-width: 760px){
  .navlinks{ display:flex; }
  .hero h1{ font-size: 38px; }
  .grid{ grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .content-block{ padding:18px; }
  .content-block.collapsible .collapsible-trigger{ padding:18px; }
  .content-block.collapsible .collapsible-panel-inner{ padding:0 18px 18px; }
  .content-block.collapsible + .section-title{ margin-top:24px; }
  .legal-card{ padding:26px 24px; }
  .legal-card h1{ font-size: 34px; }
  .legal-card h2{ font-size:18px; }
}
@media (min-width: 1040px){
  .layout{
    grid-template-columns: 1fr 320px;
    gap:22px;
  }
  aside{ display:block; position:sticky; top:88px; }
}

@media (min-width: 1920px){
  .container.top-ad{
    max-width:none;
    padding-left:16px;
    padding-right:16px;
  }
}