/* === 基礎變數 === */
:root {
  --primary: #FF7A00;
  --primary-dark: #E66A00;
  --primary-light: #FFE6CC;
  --primary-glow: rgba(255,122,0,.35);
  --accent: #2C5FBF;
  --accent-light: #E0EBFF;
  --success: #2EBD66;
  --success-light: #E0F5E8;
  --danger: #E14A4A;
  --danger-light: #FFE8E8;
  --warning: #F5B400;
  --warning-light: #FFF5D9;
  --purple: #9B59D9;
  --purple-light: #F0E6FF;

  --text: #1a1a1a;
  --text-soft: #4a4a4a;
  --text-muted: #888;
  --text-light: #b0b0b0;

  --bg: #fafafa;
  --bg-soft: #f5f5f5;
  --bg-card: #fff;
  --border: #ebebeb;
  --border-strong: #d5d5d5;

  --shadow-xs: 0 1px 2px rgba(0,0,0,.04);
  --shadow-sm: 0 2px 8px rgba(0,0,0,.06);
  --shadow-md: 0 8px 24px rgba(0,0,0,.08);
  --shadow-lg: 0 16px 48px rgba(0,0,0,.14);
  --shadow-xl: 0 24px 64px rgba(0,0,0,.18);

  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --font-sans: "Noto Sans TC", -apple-system, "PingFang TC", "Microsoft JhengHei", "Helvetica Neue", sans-serif;
  --font-mono: "Inter", -apple-system, sans-serif;

  --easing: cubic-bezier(0.4, 0, 0.2, 1);
  --easing-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  letter-spacing: .01em;
}

/* 漸變背景 */
body.home {
  background:
    radial-gradient(ellipse at top right, rgba(255,122,0,.06), transparent 50%),
    radial-gradient(ellipse at bottom left, rgba(44,95,191,.05), transparent 50%),
    var(--bg);
}

a { color: inherit; text-decoration: none; transition: color .2s var(--easing); }

::selection { background: var(--primary); color: #fff; }

/* === 頂部列 === */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 36px;
  background: rgba(255,255,255,.85);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.brand { display: flex; align-items: center; gap: 14px; }
.brand .logo {
  font-size: 36px;
  filter: drop-shadow(0 2px 4px rgba(255,122,0,.3));
  animation: gentle-bob 3s var(--easing) infinite;
}
@keyframes gentle-bob {
  0%, 100% { transform: translateY(0) rotate(-2deg); }
  50% { transform: translateY(-2px) rotate(2deg); }
}
.brand h1 { font-size: 20px; font-weight: 700; letter-spacing: -.01em; }
.subtitle { font-size: 12px; color: var(--text-muted); font-weight: 500; }

.topnav { display: flex; gap: 8px; }
.topnav a {
  font-size: 14px;
  color: var(--text-soft);
  padding: 8px 14px;
  border-radius: 10px;
  transition: all .25s var(--easing);
  font-weight: 500;
}
.topnav a:hover {
  color: var(--primary-dark);
  background: var(--primary-light);
}

/* === 首頁 Hero === */
.hero {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 48px;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 36px 64px;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary-light);
  color: var(--primary-dark);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 22px;
  box-shadow: 0 0 0 1px rgba(255,122,0,.1);
}
.badge::before { content: '●'; font-size: 8px; animation: pulse 2s infinite; }
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .4; }
}
.hero h2 {
  font-size: 46px;
  line-height: 1.2;
  margin-bottom: 22px;
  letter-spacing: -.02em;
  font-weight: 900;
  background: linear-gradient(135deg, #1a1a1a 30%, #FF7A00 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero p {
  font-size: 17px;
  color: var(--text-soft);
  margin-bottom: 32px;
  max-width: 480px;
}
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 13px 26px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  border: none;
  transition: all .25s var(--easing);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}
.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,.2), transparent);
  opacity: 0;
  transition: opacity .25s;
}
.btn:hover::before { opacity: 1; }
.btn:active { transform: scale(.97); }

.btn-primary {
  background: linear-gradient(135deg, #FF8A1A 0%, var(--primary) 100%);
  color: #fff;
  box-shadow: 0 4px 14px var(--primary-glow), 0 1px 3px rgba(0,0,0,.06);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--primary-glow), 0 2px 4px rgba(0,0,0,.08);
}
.btn-ghost {
  background: #fff;
  color: var(--text);
  border: 1.5px solid var(--border-strong);
}
.btn-ghost:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}
.btn-secondary {
  background: linear-gradient(135deg, #4079D9, var(--accent));
  color: #fff;
  box-shadow: 0 4px 14px rgba(44,95,191,.3);
}
.btn-secondary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(44,95,191,.4); }
.btn-success { background: linear-gradient(135deg, #3DD27A, var(--success)); color: #fff; }
.btn-danger { background: linear-gradient(135deg, #E96565, var(--danger)); color: #fff; }
.btn:disabled { opacity: .4; cursor: not-allowed; pointer-events: none; }

.hero-visual { display: flex; justify-content: center; align-items: center; }

/* === Hero 輪播 === */
.hero-carousel {
  position: relative;
  width: 100%;
  max-width: 540px;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 24px 56px rgba(0,0,0,.15), 0 0 0 1px var(--border);
  background: linear-gradient(135deg, #f5f5f5, #e8e8e8);
  outline: none;
}
.hero-carousel:focus-visible {
  box-shadow: 0 24px 56px rgba(0,0,0,.15), 0 0 0 3px var(--primary);
}
.hc-slides {
  position: relative;
  width: 100%;
  height: 100%;
}
.hc-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity .6s var(--easing);
  pointer-events: none;
  display: flex;
  flex-direction: column;
}
.hc-slide.active {
  opacity: 1;
  pointer-events: auto;
}
.hc-slide img,
.hc-slide canvas {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.hc-slide canvas {
  background: linear-gradient(135deg, #fafafa, #e8e8e8);
}
.hc-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(0,0,0,.78) 0%, rgba(0,0,0,.5) 60%, transparent 100%);
  color: #fff;
  padding: 60px 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  pointer-events: none;
}
.hc-caption .hc-tag {
  display: inline-block;
  width: fit-content;
  background: var(--primary);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 999px;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  letter-spacing: .05em;
}
.hc-caption strong {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -.01em;
}
.hc-caption .hc-sub {
  font-size: 13px;
  opacity: .92;
  font-weight: 500;
}

/* 左右導覽鈕 */
.hc-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(0,0,0,.05);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: var(--text);
  font-family: var(--font-sans);
  z-index: 5;
  box-shadow: 0 4px 12px rgba(0,0,0,.15);
  transition: all .2s var(--easing);
  opacity: 0;
}
.hero-carousel:hover .hc-nav { opacity: 1; }
.hc-nav:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-50%) scale(1.08);
}
.hc-prev { left: 14px; }
.hc-next { right: 14px; }

/* 圓點指示器 */
.hc-dots {
  position: absolute;
  bottom: 14px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 5;
}
.hc-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,.45);
  border: 1px solid rgba(255,255,255,.6);
  cursor: pointer;
  padding: 0;
  transition: all .25s var(--easing);
}
.hc-dot:hover { background: rgba(255,255,255,.8); }
.hc-dot.active {
  background: #fff;
  width: 28px;
  border-radius: 999px;
}

@media (max-width: 600px) {
  .hero-carousel { max-width: 100%; }
  .hc-caption strong { font-size: 17px; }
}

.hero-saw {
  width: 100%;
  max-width: 480px;
  filter: drop-shadow(0 20px 40px rgba(0,0,0,.12));
  animation: slow-float 6s ease-in-out infinite;
}
@keyframes slow-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* === Section === */
.section-title {
  font-size: 32px;
  text-align: center;
  margin-bottom: 8px;
  font-weight: 800;
  letter-spacing: -.01em;
}
.section-sub {
  text-align: center;
  color: var(--text-muted);
  margin-bottom: 44px;
  font-size: 15px;
}

/* === 工具切換器 === */
.tool-switcher {
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 36px 30px;
}
.tool-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.tool-card {
  background: #fff;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px 20px;
  text-align: center;
  cursor: pointer;
  transition: all .25s var(--easing);
  position: relative;
  display: block;
  text-decoration: none;
  color: inherit;
}
.tool-card:hover:not(.disabled) {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}
.tool-card.active {
  background: linear-gradient(135deg, #fff8f0 0%, #fff 60%);
  border-color: var(--primary);
  box-shadow: 0 4px 14px var(--primary-glow);
  cursor: default;
}
.tool-card.disabled {
  opacity: .55;
  cursor: not-allowed;
  filter: grayscale(.5);
}
.tool-icon {
  font-size: 48px;
  margin: 4px 0 10px;
  filter: drop-shadow(0 4px 8px rgba(0,0,0,.08));
  transition: transform .35s var(--easing-bounce);
}
.tool-card:hover:not(.disabled) .tool-icon {
  transform: scale(1.12) rotate(-5deg);
}
.tool-card h4 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 4px;
  letter-spacing: -.01em;
}
.tool-card p {
  font-size: 12px;
  color: var(--text-soft);
  margin-bottom: 10px;
}
.tool-meta {
  display: inline-block;
  font-size: 11px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  letter-spacing: .03em;
  font-weight: 500;
}
.tool-status {
  position: absolute;
  top: 12px; right: 12px;
  font-size: 10px;
  background: var(--text-muted);
  color: #fff;
  padding: 3px 8px;
  border-radius: 999px;
  font-weight: 700;
  letter-spacing: .03em;
}
.tool-card.active .tool-status {
  background: var(--success);
}
.tool-status.new {
  background: linear-gradient(135deg, #FF7A00, #FF4444);
  animation: pulse 2s infinite;
}
@media (max-width: 900px) {
  .tool-grid { grid-template-columns: 1fr 1fr; }
}

/* === 模組卡片 === */
.modules {
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 36px;
}
.module-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px 24px;
  transition: all .35s var(--easing);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  display: block;
}
.card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 5px;
  background: var(--primary);
  transition: height .25s var(--easing);
}
.card::after {
  content: "→";
  position: absolute;
  top: 22px; right: 22px;
  font-size: 18px;
  color: var(--text-light);
  transition: all .25s var(--easing);
}
.card-1::before { background: linear-gradient(90deg, #FF7A00, #FFB066); }
.card-2::before { background: linear-gradient(90deg, #E14A4A, #FF7A7A); }
.card-3::before { background: linear-gradient(90deg, #2C5FBF, #5BA8E0); }
.card-4::before { background: linear-gradient(90deg, #2EBD66, #88D9A0); }
.card-5::before { background: linear-gradient(90deg, #9B59D9, #D88BE8); }
.card-locked::before { background: linear-gradient(90deg, #999, #ccc); }
.card:hover:not(.card-locked) {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(255,122,0,.3);
}
.card:hover:not(.card-locked)::before { height: 8px; }
.card:hover:not(.card-locked)::after { color: var(--primary); transform: translateX(4px); }
.card-num {
  font-size: 12px;
  color: var(--text-light);
  font-weight: 700;
  letter-spacing: 2px;
  font-family: var(--font-mono);
}
.card-icon {
  font-size: 44px;
  margin: 12px 0 16px;
  display: inline-block;
  transition: transform .35s var(--easing-bounce);
}
.card:hover .card-icon { transform: scale(1.1) rotate(-5deg); }
.card h4 {
  font-size: 19px;
  margin-bottom: 8px;
  font-weight: 700;
  letter-spacing: -.01em;
}
.card p {
  font-size: 14px;
  color: var(--text-soft);
  margin-bottom: 16px;
  line-height: 1.6;
}
.card-tag {
  display: inline-block;
  font-size: 12px;
  background: var(--primary-light);
  color: var(--primary-dark);
  padding: 5px 11px;
  border-radius: 8px;
  font-weight: 700;
  letter-spacing: .02em;
}
.card-2 .card-tag { background: var(--danger-light); color: #B83333; }
.card-3 .card-tag { background: var(--accent-light); color: #1f4798; }
.card-4 .card-tag { background: var(--success-light); color: #1b6e3a; }
.card-5 .card-tag { background: var(--purple-light); color: #6f3aa6; }
.card-locked { opacity: .55; cursor: default; }
.card-locked .card-tag { background: #efefef; color: #888; }

/* === Showcase（實際畫面）=== */
.showcase {
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 36px 80px;
}
.showcase-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 8px;
}
.shot-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all .3s var(--easing);
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow-xs);
}
.shot-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(255,122,0,.4);
}
.shot-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  background: linear-gradient(135deg, #f0f0f0, #e0e0e0);
  display: block;
  border-bottom: 1px solid var(--border);
  transition: transform .4s var(--easing);
}
.shot-card:hover img {
  transform: scale(1.03);
}
.shot-meta {
  padding: 16px 18px 18px;
}
.shot-tag {
  display: inline-block;
  font-size: 11px;
  background: var(--primary-light);
  color: var(--primary-dark);
  padding: 3px 10px;
  border-radius: 999px;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: .03em;
  font-family: var(--font-mono);
}
.shot-meta h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 4px;
  letter-spacing: -.01em;
}
.shot-meta p {
  font-size: 13px;
  color: var(--text-soft);
  line-height: 1.6;
}

/* 兩張特色截圖佔兩欄寬 */
.shot-card.shot-feature {
  grid-column: span 2;
}
.shot-card.shot-feature img {
  aspect-ratio: 16 / 9;
}
.shot-card.shot-feature h4 {
  font-size: 19px;
}
.shot-card.shot-feature .shot-tag {
  background: linear-gradient(135deg, var(--primary), #FFB066);
  color: #fff;
}

@media (max-width: 900px) {
  .showcase-grid { grid-template-columns: 1fr 1fr; }
  .shot-card.shot-feature { grid-column: span 2; }
}
@media (max-width: 600px) {
  .showcase-grid { grid-template-columns: 1fr; }
  .shot-card.shot-feature { grid-column: span 1; }
}

/* === Reason 區 === */
.about {
  background: linear-gradient(180deg, #fff 0%, #fcfcfc 100%);
  padding: 80px 36px;
  position: relative;
}
.about::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}
.reason-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  max-width: 1200px;
  margin: 0 auto;
}
.reason {
  text-align: center;
  padding: 24px 16px;
  border-radius: var(--radius);
  transition: all .3s var(--easing);
}
.reason:hover { background: var(--bg-soft); transform: translateY(-3px); }
.reason span {
  font-size: 44px;
  display: block;
  margin-bottom: 12px;
  filter: drop-shadow(0 4px 8px rgba(0,0,0,.06));
}
.reason h4 { font-size: 17px; margin-bottom: 8px; font-weight: 700; }
.reason p { font-size: 14px; color: var(--text-soft); line-height: 1.6; }

/* === Teacher === */
.teacher { padding: 64px 36px; }
.teacher-card {
  max-width: 820px;
  margin: 0 auto;
  background: linear-gradient(135deg, #fff8f0, #fff 60%);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 44px;
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}
.teacher-card::before {
  content: '👨‍🏫';
  position: absolute;
  top: -20px; right: -20px;
  font-size: 140px;
  opacity: .06;
}
.teacher-card h3 { margin-bottom: 14px; font-size: 24px; font-weight: 800; }
.teacher-card p { color: var(--text-soft); margin-bottom: 18px; }
.teacher-card ol {
  padding-left: 24px;
  color: var(--text-soft);
  counter-reset: item;
  list-style: none;
}
.teacher-card li {
  margin-bottom: 12px;
  padding-left: 12px;
  counter-increment: item;
  position: relative;
}
.teacher-card li::before {
  content: counter(item);
  position: absolute;
  left: -24px; top: 2px;
  width: 22px; height: 22px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  font-family: var(--font-mono);
}
.teacher-card strong { color: var(--primary-dark); font-weight: 700; }

/* === Footer === */
footer {
  text-align: center;
  padding: 36px;
  color: var(--text-muted);
  font-size: 13px;
  border-top: 1px solid var(--border);
  background: #fff;
}

/* === Module 共用版型 === */
.module-page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 36px 28px 80px;
}
.module-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}
.module-header h2 {
  font-size: 32px;
  letter-spacing: -.02em;
  font-weight: 800;
  margin-bottom: 6px;
}
.module-step {
  font-size: 12px;
  color: var(--primary-dark);
  background: var(--primary-light);
  padding: 5px 12px;
  border-radius: 999px;
  font-weight: 700;
  letter-spacing: .05em;
  display: inline-block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
}
.module-back {
  font-size: 14px;
  color: var(--text-soft);
  display: inline-flex;
  gap: 4px;
  align-items: center;
  padding: 8px 14px;
  border-radius: 8px;
  transition: all .2s var(--easing);
}
.module-back:hover { color: var(--primary); background: var(--primary-light); }

.module-nav-bottom {
  margin-top: 56px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.panel {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-bottom: 22px;
  box-shadow: var(--shadow-xs);
}
.panel h3 {
  font-size: 19px;
  margin-bottom: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
}

/* === Module 1: 視角切換標籤 === */
.view-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
  background: var(--bg-soft);
  padding: 6px;
  border-radius: 14px;
  border: 1px solid var(--border);
  max-width: 600px;
}
.view-tab {
  flex: 1;
  background: transparent;
  border: none;
  padding: 10px 14px;
  border-radius: 10px;
  cursor: pointer;
  font-family: var(--font-sans);
  display: flex;
  align-items: center;
  gap: 10px;
  transition: all .25s var(--easing);
  color: var(--text-soft);
}
.view-tab:hover { background: rgba(255,255,255,.6); }
.view-tab.active {
  background: #fff;
  color: var(--primary-dark);
  box-shadow: 0 2px 8px rgba(0,0,0,.06);
}
.view-tab .tab-icon { font-size: 22px; }
.view-tab .tab-label {
  font-weight: 700;
  font-size: 14px;
  display: block;
}
.view-tab .tab-desc {
  font-size: 11px;
  color: var(--text-muted);
  display: block;
}
.view-tab.active .tab-desc { color: var(--primary); }
.view-tab > span:not(.tab-icon) {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.3;
}

.view-stage { position: relative; }
.view-pane { display: none; animation: fadeInUp .3s var(--easing); }
.view-pane.active { display: block; }

/* 3D 舞台 */
.three-stage {
  background: linear-gradient(180deg, #e8e8e8, #cfcfcf);
  border-radius: var(--radius-lg);
  position: relative;
  height: 540px;
  overflow: hidden;
  border: 1px solid var(--border);
}
.three-stage canvas {
  display: block;
  cursor: grab;
}
.three-stage canvas:active { cursor: grabbing; }
.three-loader {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 10;
  background: rgba(255,255,255,.6);
  backdrop-filter: blur(4px);
}
.three-controls {
  position: absolute;
  bottom: 16px;
  left: 16px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  z-index: 5;
}
.three-btn {
  background: rgba(20,20,20,.85);
  backdrop-filter: blur(8px);
  color: #fff;
  border: 1px solid rgba(255,255,255,.15);
  padding: 8px 14px;
  border-radius: 10px;
  font-size: 13px;
  font-family: var(--font-sans);
  font-weight: 500;
  cursor: pointer;
  transition: all .2s var(--easing);
}
.three-btn:hover {
  background: var(--primary);
  border-color: var(--primary);
}
.three-help {
  position: absolute;
  top: 16px;
  right: 16px;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  padding: 12px 14px;
  border-radius: 12px;
  font-size: 12px;
  color: var(--text-soft);
  max-width: 200px;
  box-shadow: var(--shadow-sm);
  z-index: 5;
}
.three-help strong {
  display: block;
  margin-bottom: 6px;
  color: var(--primary-dark);
  font-size: 13px;
}
.three-help ul {
  padding-left: 16px;
  margin: 0;
}
.three-help li { margin-bottom: 2px; }

/* 照片相簿 */
.photo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
  padding: 4px;
}
.photo-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all .25s var(--easing);
  cursor: pointer;
  box-shadow: var(--shadow-xs);
  position: relative;
}
.photo-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}
.photo-card .photo-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: linear-gradient(135deg, #f0f0f0, #e0e0e0);
  display: block;
}
.photo-card .photo-img-loading {
  width: 100%;
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #f5f5f5, #e8e8e8);
  color: var(--text-muted);
  font-size: 13px;
}
.photo-card .photo-meta {
  padding: 14px 16px;
}
.photo-card .photo-title {
  font-weight: 700;
  margin-bottom: 4px;
  font-size: 15px;
}
.photo-card .photo-desc {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 8px;
  line-height: 1.5;
}
.photo-card .photo-attribution {
  font-size: 10.5px;
  color: var(--text-light);
  border-top: 1px dashed var(--border);
  padding-top: 8px;
  line-height: 1.5;
}
.photo-card .photo-attribution a {
  color: var(--accent);
  text-decoration: underline;
}
.photo-card .photo-attribution a:hover { color: var(--primary); }
.photo-card .photo-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(20,20,20,.85);
  color: #fff;
  font-size: 11px;
  padding: 4px 10px;
  border-radius: 999px;
  font-weight: 600;
  backdrop-filter: blur(8px);
}

/* 照片 lightbox */
.photo-modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.85);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 500;
  padding: 24px;
  cursor: zoom-out;
}
.photo-modal.show { display: flex; animation: fadeIn .2s; }
.photo-modal img {
  max-width: 90vw;
  max-height: 80vh;
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0,0,0,.6);
}
.photo-modal-caption {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,.8);
  color: #fff;
  padding: 12px 20px;
  border-radius: 10px;
  font-size: 13px;
  text-align: center;
  max-width: 700px;
}
.photo-modal-caption a { color: #FFB066; text-decoration: underline; }

.attribution-banner {
  background: var(--accent-light);
  border-left: 4px solid var(--accent);
  padding: 14px 18px;
  border-radius: 0 12px 12px 0;
  margin-bottom: 18px;
  font-size: 13px;
  color: var(--text-soft);
  line-height: 1.7;
}
.attribution-banner strong { color: var(--accent); }
.attribution-banner a {
  color: var(--accent);
  text-decoration: underline;
}

/* === Module 1: 部位互動 === */
.parts-layout {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 24px;
  align-items: start;
}
@media (max-width: 900px) {
  .parts-layout, .hero, .module-grid, .reason-grid, .practice-layout, .steps-layout, .dressup, .template-grid {
    grid-template-columns: 1fr !important;
  }
  .hero h2 { font-size: 32px; }
  .topnav { display: none; }
  .module-page { padding: 20px 16px 60px; }
}
.saw-stage {
  background:
    radial-gradient(circle at 50% 30%, rgba(255,122,0,.05), transparent 60%),
    linear-gradient(180deg, #f8f8f8, #ececec);
  border-radius: var(--radius-lg);
  padding: 28px;
  position: relative;
  min-height: 460px;
  border: 1px solid var(--border);
  overflow: hidden;
}
.saw-stage::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,0,0,.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,.02) 1px, transparent 1px);
  background-size: 20px 20px;
  pointer-events: none;
}
.saw-svg { width: 100%; height: auto; position: relative; z-index: 1; }
.hotspot {
  cursor: pointer;
  fill: rgba(255,122,0,.85);
  stroke: #fff;
  stroke-width: 2.5;
  transition: all .25s var(--easing-bounce);
  filter: drop-shadow(0 2px 6px rgba(255,122,0,.4));
}
.hotspot:hover, .hotspot.active {
  fill: #FF7A00;
  r: 18;
  filter: drop-shadow(0 4px 12px rgba(255,122,0,.6));
}
.hotspot.seen { fill: rgba(46,189,102,.85); }
.hotspot-pulse {
  fill: none;
  stroke: rgba(255,122,0,.5);
  stroke-width: 2;
  pointer-events: none;
}
.hotspot-label {
  pointer-events: none;
  font-size: 11px;
  fill: #fff;
  font-weight: 700;
  text-anchor: middle;
  font-family: var(--font-mono);
}
.parts-info {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 28px;
  border: 1px solid var(--border);
  min-height: 460px;
  box-shadow: var(--shadow-xs);
  display: flex;
  flex-direction: column;
}
.parts-info h3 {
  color: var(--primary-dark);
  margin-bottom: 8px;
  font-size: 22px;
  font-weight: 800;
}
.parts-info .role {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: .05em;
  font-weight: 600;
  font-family: var(--font-mono);
}
.parts-info .desc {
  color: var(--text-soft);
  line-height: 1.75;
}
.parts-info .empty {
  color: var(--text-muted);
  text-align: center;
  margin-top: auto;
  margin-bottom: auto;
  padding: 30px;
}
.parts-info .empty .empty-icon {
  font-size: 64px;
  margin-bottom: 12px;
  opacity: .4;
}
.parts-checklist {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 28px;
}
.part-chip {
  background: #fff;
  border: 1px solid var(--border);
  padding: 7px 14px;
  border-radius: 10px;
  font-size: 13px;
  color: var(--text-soft);
  cursor: pointer;
  transition: all .2s var(--easing);
  font-weight: 500;
}
.part-chip:hover { border-color: var(--primary); }
.part-chip.seen {
  background: var(--success-light);
  border-color: var(--success);
  color: #1b6e3a;
  font-weight: 600;
}
.part-chip.seen::before { content: '✓ '; color: var(--success); }

/* === Module 2: 安全闖關 === */
.safety-progress {
  height: 10px;
  background: var(--bg-soft);
  border-radius: 999px;
  margin-bottom: 28px;
  overflow: hidden;
  border: 1px solid var(--border);
}
.safety-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--primary) 0%, var(--success) 100%);
  transition: width .5s var(--easing);
  box-shadow: 0 0 12px var(--primary-glow);
  border-radius: 999px;
}
.dressup {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.dressup-character {
  background:
    radial-gradient(ellipse at center bottom, rgba(0,0,0,.05), transparent 70%),
    linear-gradient(180deg, #fafafa, #f0f0f0);
  border-radius: var(--radius-lg);
  padding: 24px;
  min-height: 460px;
  position: relative;
  border: 1px solid var(--border);
}
.character-svg { width: 100%; }
.dressup-items {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.draggable {
  background: #fff;
  border: 2px dashed var(--border-strong);
  border-radius: 12px;
  padding: 14px 18px;
  cursor: grab;
  user-select: none;
  display: flex;
  align-items: center;
  gap: 14px;
  transition: all .2s var(--easing);
  font-weight: 500;
}
.draggable:hover {
  border-color: var(--primary);
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}
.draggable:active { cursor: grabbing; }
.draggable.placed {
  background: var(--success-light);
  border-color: var(--success);
  border-style: solid;
  opacity: .55;
  transform: none;
  cursor: default;
}
.draggable.placed::after {
  content: '✓';
  margin-left: auto;
  color: var(--success);
  font-weight: 700;
  font-size: 18px;
}
.draggable.wrong-shake {
  animation: shake .4s;
  border-color: var(--danger);
}
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-8px); }
  75% { transform: translateX(8px); }
}
.draggable .icon { font-size: 28px; }
.dropzone {
  position: absolute;
  border: 2px dashed transparent;
  border-radius: 10px;
  transition: all .2s var(--easing);
}
.dropzone.over {
  border-color: var(--primary);
  background: rgba(255,122,0,.15);
  transform: scale(1.05);
}
.dropzone.filled {
  border-color: var(--success);
  background: rgba(46,189,102,.1);
}
.dropzone.filled::after {
  content: '✓';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  color: var(--success);
  font-size: 24px;
  font-weight: 700;
}

.scenario {
  margin-top: 24px;
  padding: 20px;
  background: var(--bg-soft);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.scenario h4 {
  margin-bottom: 14px;
  font-size: 16px;
  font-weight: 700;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}
.scenario h4::before {
  content: 'Q';
  background: var(--accent);
  color: #fff;
  width: 24px; height: 24px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  flex-shrink: 0;
  font-family: var(--font-mono);
}
.scenario h4 .q-num { display: none; }
.choice-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.choice {
  background: #fff;
  border: 2px solid var(--border);
  border-radius: 12px;
  padding: 14px 18px;
  cursor: pointer;
  text-align: left;
  font-size: 14px;
  font-family: var(--font-sans);
  transition: all .2s var(--easing);
  font-weight: 500;
}
.choice:hover:not(:disabled) {
  border-color: var(--primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}
.choice.correct {
  border-color: var(--success);
  background: var(--success-light);
  color: #1b6e3a;
  font-weight: 600;
}
.choice.correct::after { content: ' ✓'; }
.choice.wrong {
  border-color: var(--danger);
  background: var(--danger-light);
  color: #a72d2d;
}
.choice.wrong::after { content: ' ✗'; }
.feedback {
  margin-top: 14px;
  padding: 14px 18px;
  border-radius: 12px;
  font-size: 14px;
  animation: fadeInUp .3s var(--easing);
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
.feedback.success {
  background: var(--success-light);
  color: #1b6e3a;
  border-left: 4px solid var(--success);
}
.feedback.error {
  background: var(--danger-light);
  color: #a72d2d;
  border-left: 4px solid var(--danger);
}
.feedback.info {
  background: var(--accent-light);
  color: #1f4798;
  border-left: 4px solid var(--accent);
}

.unlock-banner {
  background: linear-gradient(135deg, #2EBD66, #1e9450);
  color: #fff;
  padding: 32px;
  border-radius: var(--radius-lg);
  text-align: center;
  margin-top: 28px;
  box-shadow: 0 12px 32px rgba(46,189,102,.3);
  animation: fadeInUp .5s var(--easing);
}
.unlock-banner h3 {
  margin-bottom: 10px;
  font-size: 24px;
  font-weight: 800;
}
.unlock-banner p { opacity: .95; }

/* === Module 3: 步驟教學 === */
.steps-layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 24px;
}
.step-list {
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: var(--shadow-xs);
  align-self: start;
  position: sticky;
  top: 88px;
}
.step-item {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  display: flex;
  gap: 14px;
  align-items: center;
  transition: all .25s var(--easing);
  position: relative;
}
.step-item:last-child { border-bottom: none; }
.step-item:hover { background: var(--bg-soft); }
.step-item.active {
  background: linear-gradient(90deg, var(--primary-light) 0%, transparent 100%);
}
.step-item.active::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 4px;
  background: var(--primary);
}
.step-item.done { color: var(--success); }
.step-item .num {
  width: 32px; height: 32px;
  background: var(--bg-soft);
  color: var(--text-soft);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 13px;
  flex-shrink: 0;
  font-family: var(--font-mono);
  transition: all .25s var(--easing);
}
.step-item.active .num {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 0 0 4px var(--primary-light);
}
.step-item.done .num {
  background: var(--success);
  color: #fff;
}
.step-item .step-title { font-weight: 600; }

.step-detail {
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: 32px;
  min-height: 540px;
  box-shadow: var(--shadow-xs);
  animation: fadeInUp .35s var(--easing);
}
.step-detail .step-num {
  font-size: 12px;
  color: var(--primary);
  font-weight: 700;
  letter-spacing: 2px;
  font-family: var(--font-mono);
}
.step-detail h3 {
  font-size: 28px;
  margin: 6px 0 20px;
  font-weight: 800;
  letter-spacing: -.01em;
}
.step-detail > p { font-size: 15px; line-height: 1.75; color: var(--text-soft); }
.step-anim {
  background:
    radial-gradient(circle at 50% 50%, rgba(255,122,0,.04), transparent 70%),
    linear-gradient(180deg, #f8f8f8, #ececec);
  border-radius: var(--radius);
  height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border);
}
.step-anim::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,0,0,.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,.02) 1px, transparent 1px);
  background-size: 16px 16px;
  pointer-events: none;
}
.step-tip {
  background: var(--warning-light);
  border-left: 4px solid var(--warning);
  padding: 14px 18px;
  border-radius: 0 12px 12px 0;
  margin-top: 14px;
  font-size: 14px;
  line-height: 1.7;
}
.step-tip strong { color: #8b6914; }
.step-warn {
  background: var(--danger-light);
  border-left: 4px solid var(--danger);
  padding: 14px 18px;
  border-radius: 0 12px 12px 0;
  margin-top: 14px;
  font-size: 14px;
  line-height: 1.7;
}
.step-warn strong { color: #a72d2d; }

/* === Module 4: 模擬切割 === */
.practice-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 22px;
}
.canvas-wrap {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px;
  position: relative;
  box-shadow: var(--shadow-xs);
}
#sim-canvas {
  width: 100%;
  max-width: 760px;
  height: auto;
  display: block;
  background: #fdfdf7;
  border-radius: var(--radius);
  cursor: grab;
  touch-action: none;
  border: 1px solid var(--border);
  box-shadow: inset 0 2px 8px rgba(0,0,0,.04);
}
#sim-canvas.dragging { cursor: grabbing; }
.sim-overlay {
  position: absolute;
  top: 28px; left: 28px;
  background: rgba(20,20,20,.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: #fff;
  padding: 10px 16px;
  border-radius: 10px;
  font-size: 13px;
  pointer-events: none;
  font-weight: 500;
  box-shadow: var(--shadow-md);
}
.sim-overlay::before {
  content: '●';
  color: var(--success);
  margin-right: 8px;
  animation: pulse 1.5s infinite;
}
.sim-side {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.level-list {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px;
  box-shadow: var(--shadow-xs);
}
.level-list h4 {
  font-size: 13px;
  margin-bottom: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .1em;
  font-family: var(--font-mono);
  font-weight: 700;
}
.level-btn {
  width: 100%;
  text-align: left;
  background: var(--bg-soft);
  border: 1.5px solid var(--border);
  border-radius: 10px;
  padding: 11px 14px;
  margin-bottom: 8px;
  cursor: pointer;
  font-size: 14px;
  font-family: var(--font-sans);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all .2s var(--easing);
  font-weight: 500;
}
.level-btn:hover { border-color: var(--primary); transform: translateX(2px); }
.level-btn.active {
  background: linear-gradient(135deg, #FF8A1A, var(--primary));
  color: #fff;
  border-color: var(--primary);
  box-shadow: 0 4px 12px var(--primary-glow);
}
.level-btn .stars {
  font-size: 13px;
  letter-spacing: 1px;
  color: var(--warning);
}
.level-btn.active .stars { color: #fff; }

.metrics {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px;
  box-shadow: var(--shadow-xs);
}
.metric {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  font-size: 14px;
  border-bottom: 1px dashed var(--border);
}
.metric:last-child { border-bottom: none; }
.metric > span:first-child { color: var(--text-muted); font-size: 13px; }
.metric .v {
  font-weight: 700;
  color: var(--text);
  font-family: var(--font-mono);
}
.metric .v.good { color: var(--success); }
.metric .v.warn { color: #d97706; }
.metric .v.bad { color: var(--danger); }

.sim-controls {
  display: flex;
  gap: 10px;
  margin-top: 14px;
}
.sim-controls .btn { flex: 1; padding: 11px; font-size: 14px; }

.help-card {
  font-size: 13px;
  color: var(--text-soft);
  background: var(--accent-light);
  border: 1px solid rgba(44,95,191,.2);
  border-radius: var(--radius-lg);
  padding: 14px 16px;
  line-height: 1.7;
}
.help-card strong { color: var(--accent); display: block; margin-bottom: 6px; }
.help-card ul { padding-left: 18px; }
.help-card li { margin-bottom: 3px; }

.toast {
  position: fixed;
  top: 88px;
  left: 50%;
  transform: translateX(-50%) translateY(-10px);
  background: rgba(20,20,20,.92);
  backdrop-filter: blur(10px);
  color: #fff;
  padding: 14px 22px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 500;
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: all .3s var(--easing);
  box-shadow: var(--shadow-lg);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.warn { background: rgba(217, 119, 6, .95); }
.toast.bad { background: rgba(185, 28, 28, .95); }
.toast.good { background: rgba(46, 189, 102, .95); }

.result-modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.6);
  backdrop-filter: blur(8px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 300;
}
.result-modal.show { display: flex; animation: fadeIn .3s; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.result-card {
  background: #fff;
  border-radius: var(--radius-xl);
  padding: 40px;
  max-width: 440px;
  width: 90%;
  text-align: center;
  box-shadow: var(--shadow-xl);
  animation: popIn .4s var(--easing-bounce);
}
@keyframes popIn {
  0% { transform: scale(.8); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}
.result-card h2 {
  margin-bottom: 12px;
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -.01em;
}
.result-stars {
  font-size: 56px;
  margin: 18px 0;
  letter-spacing: 6px;
  filter: drop-shadow(0 4px 12px rgba(255,180,0,.4));
}
.result-detail {
  text-align: left;
  margin: 24px 0;
  background: var(--bg-soft);
  border-radius: 12px;
  padding: 16px;
}
.result-detail div {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px dashed var(--border);
  font-size: 14px;
}
.result-detail div:last-child { border-bottom: none; }
.result-detail strong { font-family: var(--font-mono); color: var(--primary-dark); }
.result-actions { display: flex; gap: 10px; justify-content: center; }

/* === Module 5: 創作挑戰 === */
.template-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.template-card {
  background: #fff;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  text-align: center;
  cursor: pointer;
  transition: all .25s var(--easing);
  position: relative;
}
.template-card:hover {
  border-color: var(--primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.template-card.active {
  border-color: var(--primary);
  background: var(--primary-light);
  box-shadow: 0 8px 24px var(--primary-glow);
}
.template-card.active::before {
  content: '✓';
  position: absolute;
  top: 12px; right: 12px;
  width: 24px; height: 24px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
}
.template-svg {
  width: 100%;
  height: 130px;
  filter: drop-shadow(0 4px 8px rgba(255,122,0,.15));
}
.template-name {
  font-weight: 700;
  margin: 10px 0 4px;
  font-size: 15px;
}
.template-meta {
  font-size: 12px;
  color: var(--text-muted);
}
.template-meta .difficulty {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 6px;
  font-weight: 700;
  margin-right: 6px;
  font-family: var(--font-mono);
  letter-spacing: .03em;
}
.diff-easy { background: var(--success-light); color: #1b6e3a; }
.diff-mid { background: var(--warning-light); color: #8b6914; }
.diff-hard { background: var(--danger-light); color: #a72d2d; }

.plan-output {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-top: 22px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-xs);
  animation: fadeInUp .4s var(--easing);
}
.plan-output h3 { margin-bottom: 16px; font-size: 19px; font-weight: 700; }
.plan-canvas-wrap {
  background:
    radial-gradient(ellipse at center, rgba(255,122,0,.04), transparent 70%),
    linear-gradient(180deg, #f8f8f8, #ececec);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 20px;
  border: 1px solid var(--border);
}
.plan-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-bottom: 18px;
}
.plan-stat {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
  transition: all .2s var(--easing);
}
.plan-stat:hover { transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.plan-stat .label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .08em;
  font-family: var(--font-mono);
  font-weight: 600;
  margin-bottom: 4px;
}
.plan-stat .value {
  font-size: 24px;
  font-weight: 800;
  color: var(--primary-dark);
  font-family: var(--font-mono);
  letter-spacing: -.01em;
}

/* === Achievements === */
.achievement-shelf {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 12px;
}
.badge-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  background: linear-gradient(135deg, #FFD700, #FFA500);
  color: #fff;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  box-shadow: 0 2px 6px rgba(255,165,0,.3);
}

/* === Util === */
.center { text-align: center; }
.muted { color: var(--text-muted); font-size: 14px; }
.hidden { display: none !important; }

/* === Loading === */
.loading-screen {
  position: fixed;
  inset: 0;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  gap: 20px;
  transition: opacity .5s;
}
.loading-screen.hide { opacity: 0; pointer-events: none; }
.loading-spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* === Sound toggle === */
.sound-toggle {
  position: fixed;
  bottom: 24px; right: 24px;
  width: 48px; height: 48px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  cursor: pointer;
  font-size: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all .2s var(--easing);
  z-index: 50;
}
.sound-toggle:hover { transform: scale(1.08); }

/* === Print Styles === */
@media print {
  .topbar, .module-nav-bottom, .sound-toggle, .btn, .topnav { display: none !important; }
  body { background: #fff; }
  .panel { box-shadow: none; border: 1px solid #ccc; }
}

/* === 頁面進入動畫 === */
.module-page > * {
  animation: pageIn .5s var(--easing) backwards;
}
.module-page > *:nth-child(1) { animation-delay: 0s; }
.module-page > *:nth-child(2) { animation-delay: .08s; }
.module-page > *:nth-child(3) { animation-delay: .16s; }
.module-page > *:nth-child(4) { animation-delay: .24s; }
@keyframes pageIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

main > * {
  animation: pageIn .6s var(--easing) backwards;
}
main > *:nth-child(2) { animation-delay: .1s; }
main > *:nth-child(3) { animation-delay: .2s; }
main > *:nth-child(4) { animation-delay: .3s; }

/* === 進度指示器（學習路徑） === */
.progress-trail {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin: 30px 0 20px;
  flex-wrap: wrap;
}
.trail-step {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  color: var(--text-muted);
}
.trail-step .dot {
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--border);
  transition: all .3s var(--easing);
}
.trail-step.done .dot {
  background: var(--success);
  box-shadow: 0 0 0 4px var(--success-light);
}
.trail-step.current .dot {
  background: var(--primary);
  box-shadow: 0 0 0 4px var(--primary-light);
  animation: pulse 1.5s infinite;
}
.trail-line {
  width: 24px;
  height: 2px;
  background: var(--border);
}

/* === 額外微調 === */
.pulse-dot {
  display: inline-block;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--success);
  margin-right: 6px;
  animation: pulse 1.5s infinite;
}

/* 焦點環美化 */
button:focus-visible, a:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  border-radius: 8px;
}

/* 文字選擇 */
.draggable, .level-btn, .step-item, .card { user-select: none; }

/* 滾動條 */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg-soft); }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-light); }