/* ═══════════════════════════════════════════════
   AIAP 備考站 v3 — 設計系統（全面重構版）
   淺色・寬版・Apple 白底藍・敘事型 Landing
   ═══════════════════════════════════════════════ */
:root {
  --teal: #00b894;
  --teal-dark: #00997e;
  --teal-light: #d9f2ec;
  --teal-gradient: linear-gradient(135deg, #00b894 0%, #55efc4 100%);
  --teal-bg: #f7fcfb;
  --teal-ink: #0a3d33;
  --blue: #00b894;
  --blue-dark: #00997e;
  --blue-light: #e0f5ef;
  --blue-gradient: linear-gradient(135deg, #00b894 0%, #55efc4 100%);
  --green: #1a8a3f;
  --green-light: #e8f8ee;
  --amber: #b8860b;
  --amber-light: #fef6e0;
  --red: #d64545;
  --red-light: #fde8e8;
  --ink: #0a3d33;
  --ink-2: #2d5a50;
  --text: #0a3d33;
  --text-secondary: #6b8a82;
  --bg: #f7fcfb;
  --bg-card: #ffffff;
  --bg-secondary: #effaf7;
  --border-light: #d9f2ec;
  --shadow-sm: 0 1px 3px rgba(0,120,100,.06);
  --shadow-md: 0 4px 16px rgba(0,120,100,.1);
  --shadow-lg: 0 12px 40px rgba(0,120,100,.14);
  --radius: 14px;
  --radius-lg: 20px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "Microsoft JhengHei", "Noto Sans TC", sans-serif;
}
* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body { font-family:var(--font); background:var(--bg); color:var(--text); line-height:1.65; font-size:16px; -webkit-font-smoothing:antialiased; }
.container { max-width:1280px; margin:0 auto; padding:0 24px; }
img { max-width:100%; }
a { color:var(--blue); text-decoration:none; }
a:hover { text-decoration:none; }
h1,h2,h3,h4 { line-height:1.3; font-weight:700; color:var(--ink); }
h2 { font-size:1.8rem; letter-spacing:-.02em; }
h3 { font-size:1.15rem; }
p { color:var(--text-2); }
.mt-2 { margin-top:12px; } .mt-3 { margin-top:20px; } .mb-2 { margin-bottom:12px; } .text-center { text-align:center; }
.text-sm { font-size:.85rem; } .text-secondary { color:var(--text-secondary); }

/* ── 導航 ── */
.topbar { position:sticky; top:0; z-index:100; background:rgba(251,251,253,.85); backdrop-filter:blur(16px); border-bottom:1px solid var(--border-light); }
.nav-inner { display:flex; align-items:center; justify-content:space-between; height:60px; }
.brand { display:flex; align-items:center; gap:10px; font-weight:800; font-size:1.1rem; color:var(--ink); }
.brand-logo { width:34px; height:34px; border-radius:10px; background:var(--blue-gradient); display:flex; align-items:center; justify-content:center; font-size:1rem; color:#fff; font-weight:800; box-shadow:0 2px 8px rgba(0,184,148,.35); }
.nav-links { display:flex; gap:6px; }
.nav-links a { padding:8px 14px; border-radius:20px; font-size:.9rem; font-weight:600; color:var(--ink-2); transition:all .18s; }
.nav-links a:hover { background:var(--bg-secondary); color:var(--ink); }
.nav-links a.active { background:var(--blue); color:#fff; }
.nav-cta { padding:8px 18px; border-radius:20px; background:var(--blue); color:#fff; font-weight:600; font-size:.88rem; transition:all .18s; }
.nav-cta:hover { background:var(--blue-dark); transform:translateY(-1px); }
.menu-btn { display:none; background:none; border:none; font-size:1.4rem; cursor:pointer; }

/* ── Hero ── */
.hero { position:relative; padding:72px 0 110px; overflow:hidden; background:
  radial-gradient(700px 300px at 90% -5%, rgba(85,239,196,.35), transparent 60%),
  radial-gradient(600px 260px at -5% 110%, rgba(0,184,148,.18), transparent 55%),
  linear-gradient(180deg, #ffffff 0%, #effaf7 100%); }
.hero::after { content:''; position:absolute; top:60px; right:10%; width:90px; height:90px; border-radius:50%; border:3px solid rgba(0,184,148,.18); }
.hero::before { content:''; position:absolute; top:120px; right:14%; width:14px; height:14px; border-radius:50%; background:#55efc4; opacity:.7; }
.hero-grid { display:grid; grid-template-columns:1.15fr .85fr; gap:48px; align-items:center; }
.hero-visual { position:relative; display:flex; flex-direction:column; justify-content:center; min-height:380px; }
.hero-float { position:absolute; top:-16px; right:4px; background:#fff; border:1px solid var(--border-light); border-radius:12px; padding:7px 13px; font-size:.78rem; font-weight:600; box-shadow:var(--shadow-md); display:flex; align-items:center; gap:6px; z-index:3; }
.hero-badge { display:inline-flex; align-items:center; gap:6px; padding:6px 14px; border-radius:20px; background:#fff; border:1px solid var(--border-light); font-size:.8rem; font-weight:600; color:var(--ink-2); box-shadow:var(--shadow-sm); margin-bottom:20px; }
.hero h1 { font-size:2.9rem; font-weight:800; letter-spacing:-.03em; margin-bottom:18px; }
.hero h1 .grad { background:var(--blue-gradient); -webkit-background-clip:text; background-clip:text; -webkit-text-fill-color:transparent; }
.hero-sub { font-size:1.08rem; color:var(--text-secondary); max-width:520px; margin-bottom:30px; }
.hero-cta { display:flex; gap:14px; flex-wrap:wrap; }
.btn { display:inline-flex; align-items:center; gap:8px; padding:14px 30px; border-radius:28px; font-weight:700; font-size:1rem; transition:all .2s; cursor:pointer; border:none; }
.btn-primary { background:var(--blue); color:#fff; box-shadow:0 4px 16px rgba(0,184,148,.35); }
.btn-primary:hover { background:var(--blue-dark); transform:translateY(-2px); box-shadow:0 8px 24px rgba(0,184,148,.4); }
.btn-green { background:#30d158; color:#fff; box-shadow:0 4px 16px rgba(48,209,88,.35); }
.btn-green:hover { transform:translateY(-2px); }
.btn-ghost { background:#fff; color:var(--ink); border:1px solid var(--border-light); box-shadow:var(--shadow-sm); }
.btn-ghost:hover { background:var(--bg-secondary); transform:translateY(-1px); }
.hero-stats { display:flex; gap:32px; margin-top:36px; flex-wrap:wrap; }
.hstat b { display:block; font-size:1.7rem; font-weight:800; color:var(--blue); }
.hstat span { font-size:.82rem; color:var(--text-secondary); }
.hero-visual { position:relative; }
.hero-card { background:var(--bg-card); border-radius:var(--radius-lg); box-shadow:var(--shadow-lg); padding:26px; border:1px solid var(--border-light); position:relative; }
.hero-card-title { font-size:.9rem; font-weight:700; margin-bottom:14px; display:flex; justify-content:space-between; align-items:center; }
.hero-card .tag { font-size:.7rem; }
/* gauge */
.gauge-wrap { display:flex; align-items:flex-end; gap:8px; justify-content:center; margin:10px 0 16px; }
.gauge { width:110px; height:60px; position:relative; overflow:hidden; }
.gauge svg { width:100%; height:100%; }
.gauge-value { position:absolute; bottom:2px; left:0; right:0; text-align:center; font-size:1.15rem; font-weight:800; color:var(--ink); }
.hero-mini-stats { display:grid; grid-template-columns:1fr 1fr; gap:10px; margin-top:6px; }
.mini-stat { background:var(--bg-secondary); border-radius:10px; padding:10px 14px; }
.mini-stat b { font-size:1.05rem; color:var(--ink); display:block; }
.mini-stat span { font-size:.75rem; color:var(--text-secondary); }
.hero-float.pulse { animation:pulse 2.4s infinite; }
@keyframes pulse { 0%,100%{ box-shadow:0 4px 12px rgba(0,184,148,.15);} 50%{ box-shadow:0 4px 18px rgba(0,184,148,.35);} }

/* ── Section 通用 ── */
.section { padding:64px 0; }
.section-alt { background:var(--bg-card); border-top:1px solid var(--border-light); border-bottom:1px solid var(--border-light); }
.section-head { text-align:center; max-width:680px; margin:0 auto 44px; }
.section-head .kicker { display:inline-block; padding:4px 14px; border-radius:20px; background:var(--blue-light); color:var(--blue-dark); font-size:.78rem; font-weight:700; margin-bottom:14px; }
.section-head h2 { margin-bottom:10px; }
.section-head p { color:var(--text-secondary); font-size:1rem; }

/* ── 學習流程 4 步驟 ── */
.flow { display:grid; grid-template-columns:repeat(4,1fr); gap:20px; }
.flow-step { position:relative; background:var(--bg-card); border:1px solid var(--border-light); border-radius:var(--radius); padding:24px 20px; box-shadow:var(--shadow-sm); transition:all .25s; }
.flow-step:hover { transform:translateY(-4px); box-shadow:var(--shadow-md); }
.flow-num { position:absolute; top:-14px; left:20px; width:28px; height:28px; border-radius:50%; background:var(--blue); color:#fff; font-size:.85rem; font-weight:800; display:flex; align-items:center; justify-content:center; box-shadow:0 2px 8px rgba(0,184,148,.4); }
.flow-step:nth-child(2) .flow-num { background:#30d158; box-shadow:0 2px 8px rgba(48,209,88,.4); }
.flow-step:nth-child(3) .flow-num { background:var(--amber); box-shadow:0 2px 8px rgba(184,134,11,.4); }
.flow-step:nth-child(4) .flow-num { background:var(--blue-dark); }
.flow-icon { font-size:1.7rem; margin-bottom:10px; }
.flow-step h3 { font-size:1rem; margin-bottom:6px; }
.flow-step p { font-size:.83rem; color:var(--text-secondary); }

/* ── 儀表板卡片 ── */
.dash-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:20px; }
.dash-card { background:var(--bg-card); border:1px solid var(--border-light); border-radius:var(--radius); padding:22px; box-shadow:var(--shadow-sm); text-align:center; transition:all .25s; }
.dash-card:hover { transform:translateY(-3px); box-shadow:var(--shadow-md); }
.dash-icon { width:46px; height:46px; border-radius:12px; display:flex; align-items:center; justify-content:center; font-size:1.4rem; margin:0 auto 12px; }
.dash-card h3 { font-size:.9rem; color:var(--text-secondary); font-weight:600; margin-bottom:4px; }
.dash-value { font-size:1.9rem; font-weight:800; color:var(--ink); line-height:1.2; }
.dash-note { font-size:.78rem; color:var(--text-secondary); margin-top:6px; }

/* ── 卡片網格 ── */
.cards-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(300px,1fr)); gap:20px; }
.card { background:var(--bg-card); border:1px solid var(--border-light); border-radius:var(--radius); padding:22px; box-shadow:var(--shadow-sm); transition:all .25s; }
.card:hover { box-shadow:var(--shadow-md); }
.card-icon { width:42px; height:42px; border-radius:10px; display:flex; align-items:center; justify-content:center; font-size:1.2rem; margin-bottom:12px; }
.card h3 { margin-bottom:6px; }
.card p { font-size:.88rem; color:var(--text-secondary); }
.card-expandable { cursor:pointer; position:relative; }
.card-toggle { position:absolute; top:16px; right:16px; color:var(--text-secondary); font-size:.75rem; transition:transform .2s; }
.card-expandable.open .card-toggle { transform:rotate(180deg); }
.card-detail { display:none; margin-top:12px; padding-top:12px; border-top:1px solid var(--border-light); font-size:.88rem; color:var(--text-2); }
.card-expandable.open .card-detail { display:block; animation:fadeIn .25s; }
@keyframes fadeIn { from{opacity:0; transform:translateY(-4px);} to{opacity:1;} }

/* ── 標籤 ── */
.tag { display:inline-block; padding:2px 10px; border-radius:12px; font-size:.72rem; font-weight:700; }
.tag-primary { background:var(--blue-light); color:var(--blue-dark); }
.tag-success { background:var(--green-light); color:var(--green); }
.tag-warning { background:var(--amber-light); color:var(--amber); }
.tag-danger { background:var(--red-light); color:var(--red); }

/* ── 表格 ── */
.table-wrap { overflow-x:auto; background:var(--bg-card); border:1px solid var(--border-light); border-radius:var(--radius); }
.table-wrap table { width:100%; border-collapse:collapse; font-size:.88rem; min-width:560px; }
.table-wrap th { background:var(--bg-secondary); text-align:left; padding:12px 16px; font-weight:700; color:var(--ink); border-bottom:1px solid var(--border-light); }
.table-wrap td { padding:11px 16px; border-bottom:1px solid var(--border-light); color:var(--ink-2); }
.table-wrap tr:last-child td { border-bottom:none; }
.table-wrap tr:hover td { background:var(--bg-secondary); }

/* ── 測驗元件 ── */
.quiz-container { display:flex; flex-direction:column; gap:16px; }
.quiz-question { background:var(--bg-card); border:1px solid var(--border-light); border-radius:var(--radius); padding:20px; box-shadow:var(--shadow-sm); }
.quiz-q-header { margin-bottom:8px; }
.quiz-q-num { font-size:.82rem; color:var(--text-secondary); font-weight:600; }
.quiz-q-text { font-size:.98rem; font-weight:600; margin-bottom:14px; }
.quiz-options { display:flex; flex-direction:column; gap:8px; }
.quiz-option { display:block; padding:11px 14px; border:1px solid var(--border-light); border-radius:10px; cursor:pointer; font-size:.9rem; transition:all .15s; }
.quiz-option:hover { border-color:var(--blue); background:var(--blue-light); }
.quiz-option.correct { border-color:var(--green); background:var(--green-light); color:var(--green); font-weight:700; }
.quiz-option.wrong { border-color:var(--red); background:var(--red-light); color:var(--red); }
.quiz-option .letter { display:inline-flex; width:24px; height:24px; border-radius:50%; background:var(--bg-secondary); align-items:center; justify-content:center; font-size:.75rem; font-weight:700; margin-right:10px; }
.quiz-answer { display:none; margin-top:10px; padding:10px 14px; background:var(--blue-light); border-radius:10px; font-size:.85rem; }
.quiz-answer.show { display:block; }
.progress-bar-bg { background:var(--bg-secondary); border-radius:8px; height:8px; overflow:hidden; }
.progress-bar-fill { background:var(--blue-gradient); height:100%; border-radius:8px; transition:width .4s ease; }

/* ── recall box ── */
.recall-box { display:flex; gap:14px; background:var(--blue-light); border:1px solid #d9f2ec; border-radius:var(--radius); padding:16px 20px; margin:16px 0; }
.recall-icon { font-size:1.3rem; }
.recall-text { font-size:.9rem; color:var(--ink-2); }
.recall-text strong { color:var(--ink); }

/* ── 心智圖 ── */
.mindmap { display:flex; flex-direction:column; align-items:center; margin:24px 0; }
.mm-root { background:var(--blue-gradient); color:#fff; padding:12px 28px; border-radius:26px; font-size:1.05rem; font-weight:800; box-shadow:0 4px 16px rgba(0,184,148,.35); }
.mm-branches { display:flex; gap:20px; margin-top:18px; flex-wrap:wrap; justify-content:center; width:100%; }
.mm-branch { flex:1; min-width:300px; background:var(--bg-card); border:1px solid var(--border-light); border-radius:var(--radius); padding:16px 18px; box-shadow:var(--shadow-sm); }
.mm-branch-title { font-weight:800; margin-bottom:12px; display:flex; align-items:center; gap:8px; font-size:.95rem; }
.mm-branch.w1 .mm-branch-title { color:var(--blue); }
.mm-branch.w2 .mm-branch-title { color:var(--green); }
.mm-nodes { display:flex; flex-direction:column; gap:7px; }
.mm-node { display:flex; align-items:center; gap:8px; padding:8px 12px; border-radius:9px; background:var(--bg-secondary); font-size:.85rem; }
.mm-node b { color:var(--ink); white-space:nowrap; }
.mm-node.w1 { border-left:3px solid var(--blue); }
.mm-node.w2 { border-left:3px solid var(--green); }
.mm-node .mm-tag { margin-left:auto; font-size:.7rem; color:var(--text-secondary); white-space:nowrap; }

/* ── 最新消息 ── */
.news-block { background:var(--bg-card); border:1px solid var(--border-light); border-radius:var(--radius); padding:22px 26px; box-shadow:var(--shadow-sm); }
.news-list { list-style:none; }
.news-list li { padding:10px 0; border-bottom:1px solid var(--border-light); display:flex; align-items:center; gap:10px; }
.news-list li:last-child { border-bottom:none; }
.news-list a { color:var(--ink); font-size:.9rem; flex:1; transition:color .15s; }
.news-list a:hover { color:var(--blue); }

/* ── 舊元件相容（v2 遷移保留）── */
.section-title { text-align:center; max-width:680px; margin:0 auto 36px; }
.section-title h2 { margin-bottom:10px; }
.section-title p { color:var(--text-secondary); font-size:.98rem; }
.ad-slot { background:var(--bg-secondary); border:1px dashed var(--border-light); border-radius:var(--radius); padding:26px; text-align:center; color:var(--text-secondary); font-size:.85rem; margin:20px 0; }
.mt-1 { margin-top:8px; } .fw-600 { font-weight:600; }
.day-header { font-size:1.05rem; font-weight:800; color:var(--ink); display:flex; align-items:center; gap:10px; margin:18px 0 10px; }
.day-badge { display:inline-flex; align-items:center; justify-content:center; min-width:52px; padding:4px 12px; border-radius:16px; background:var(--blue); color:#fff; font-size:.8rem; font-weight:700; }
.phase-row { display:flex; align-items:center; gap:10px; padding:10px 0; border-bottom:1px solid var(--border-light); font-size:.9rem; }
.email-capture { padding:60px 0; background:var(--bg-secondary); border-top:1px solid var(--border-light); }
.email-capture h2 { text-align:center; margin-bottom:8px; }
.email-capture p { text-align:center; color:var(--text-secondary); margin-bottom:24px; }
.card-link { display:inline-block; margin-top:10px; font-size:.85rem; font-weight:600; color:var(--blue); }
/* download list */
.download-list { display:flex; flex-direction:column; gap:12px; }
.download-item { display:flex; align-items:center; justify-content:space-between; gap:14px; background:var(--bg-card); border:1px solid var(--border-light); border-radius:var(--radius); padding:16px 20px; box-shadow:var(--shadow-sm); flex-wrap:wrap; transition:all .2s; }
.download-item:hover { box-shadow:var(--shadow-md); }
.download-info { display:flex; align-items:center; gap:14px; flex:1; min-width:240px; }
.download-icon { width:42px; height:42px; border-radius:10px; background:var(--blue-light); display:flex; align-items:center; justify-content:center; font-size:1.2rem; flex-shrink:0; }
.download-name { font-weight:700; font-size:.92rem; color:var(--ink); }
.download-size { font-size:.78rem; color:var(--text-secondary); margin-top:2px; }
.download-btn { display:inline-flex; align-items:center; gap:6px; padding:10px 22px; border-radius:22px; background:var(--blue); color:#fff; font-size:.85rem; font-weight:700; transition:all .2s; }
.download-btn:hover { background:var(--blue-dark); transform:translateY(-1px); box-shadow:0 4px 14px rgba(0,184,148,.3); }

/* ── CTA 區 ── */
.cta-band { padding:64px 0; background:var(--blue-gradient); color:#fff; }
.cta-inner { text-align:center; }
.cta-inner h2 { color:#fff; margin-bottom:10px; }
.cta-inner p { color:rgba(255,255,255,.9); margin-bottom:26px; }
.cta-inner .btn-white { background:#fff; color:var(--blue); box-shadow:0 4px 16px rgba(0,0,0,.2); }
.cta-inner .btn-white:hover { transform:translateY(-2px); }

/* ── Email 訂閱 ── */
.email-form { display:flex; gap:10px; max-width:440px; margin:0 auto; flex-wrap:wrap; justify-content:center; }
.email-form input { flex:1; min-width:220px; padding:14px 20px; border-radius:28px; border:none; font-size:.95rem; box-shadow:0 2px 8px rgba(0,0,0,.1); outline:none; }
.email-form button { padding:14px 26px; border-radius:28px; background:var(--blue); color:#fff; font-weight:700; font-size:.95rem; border:none; cursor:pointer; transition:all .2s; }
.email-form button:hover { background:var(--blue-dark); transform:translateY(-1px); }

/* ── Footer ── */
.site-footer { background:var(--bg-card); border-top:1px solid var(--border-light); padding:36px 0; }
.footer-grid { display:flex; justify-content:space-between; gap:24px; flex-wrap:wrap; align-items:center; }
.footer-brand { font-weight:800; color:var(--ink); font-size:1rem; }
.footer-links a { font-size:.85rem; color:var(--text-secondary); margin-right:16px; }
.footer-links a:hover { color:var(--blue); }
.footer-note { font-size:.78rem; color:var(--text-secondary); margin-top:12px; }

/* ── 響應式 ── */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns:1fr; gap:36px; }
  .hero h1 { font-size:2.2rem; }
  .flow { grid-template-columns:1fr 1fr; }
  .dash-grid { grid-template-columns:1fr 1fr; }
  .nav-links { display:none; }
  .menu-btn { display:block; }
  .nav-links.open { display:flex; flex-direction:column; position:absolute; top:60px; left:0; right:0; background:#fff; border-bottom:1px solid var(--border-light); padding:12px 20px; gap:4px; }
}
@media (max-width: 560px) {
  .hero { padding:48px 0 60px; }
  .hero h1 { font-size:1.8rem; }
  .flow { grid-template-columns:1fr; }
  .dash-grid { grid-template-columns:1fr; }
  .cards-grid { grid-template-columns:1fr; }
  .hero-stats { gap:20px; }
}