/* ==========================================================================
   口袋拼圖 (Pocket Puzzle) 官方網站樣式表
   設計風格：幼童護眼溫馨粉彩 · 圓潤3D微擬物 · 柔和木質與純淨奶油白
   規範標準：符合 Design System (ColorTokens.swift) 規格
   ========================================================================== */

:root {
  /* 品牌色彩代碼 (來自 ColorTokens.swift) */
  --primary: #FF8A65;
  --primary-dark: #9F4122;
  --primary-bevel: #7F2A0D;
  --primary-light: #FFDBD0;

  --secondary: #4FC3F7;
  --secondary-container: #58CAFE;
  --secondary-dark: #006688;
  --secondary-bevel: #004D67;
  --secondary-light: #C2E8FF;

  --tertiary: #81C784;
  --tertiary-container: #75BA78;
  --tertiary-dark: #286B33;
  --tertiary-bevel: #07521D;

  --gold: #FFB81C;
  --gold-star: #FFD700;

  /* 背景與畫布色 */
  --bg-canvas: #FFFDF7;
  --surface: #FFFFFF;
  --surface-soft: #F4FAFF;
  --surface-low: #E7F6FF;
  --wood-frame: #E8DECB;
  --wood-border: #D6C7B0;
  --wood-mat: #FAF6ED;

  /* 文字與描邊 */
  --text-dark: #37474F;
  --text-medium: #56423C;
  --text-light: #89726B;
  --outline: #DDC0B8;

  /* 陰影與立體厚度 */
  --shadow-sm: 0 4px 10px rgba(86, 66, 60, 0.06);
  --shadow-md: 0 8px 24px rgba(86, 66, 60, 0.09);
  --shadow-lg: 0 16px 36px rgba(86, 66, 60, 0.12);
  --shadow-pill: 0 6px 0 var(--primary-bevel);

  /* 字型定義 */
  --font-family: 'Quicksand', 'Outfit', 'Noto Sans TC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* 基礎重置 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-canvas);
  color: var(--text-dark);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* 容器寬度 */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   導航列 (Navbar)
   ========================================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: rgba(255, 253, 247, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 2px solid var(--wood-frame);
  transition: all 0.3s ease;
}

.navbar.scrolled {
  background-color: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-sm);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
}

.nav-brand-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  transition: transform 0.2s ease;
}

.nav-brand:hover .nav-brand-icon {
  transform: scale(1.05) rotate(-3deg);
}

.nav-brand-text {
  display: flex;
  flex-direction: column;
}

.nav-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary-dark);
  letter-spacing: -0.5px;
}

.nav-sub {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--secondary-dark);
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 28px;
}

.nav-link {
  text-decoration: none;
  color: var(--text-dark);
  font-weight: 600;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

.nav-link:hover {
  color: var(--primary);
}

.nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--primary);
  color: #FFFFFF;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 10px 22px;
  border-radius: 999px;
  box-shadow: 0 4px 0 var(--primary-bevel);
  transition: all 0.15s ease;
}

.nav-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 0 var(--primary-bevel);
  background-color: #FF9A78;
}

.nav-btn:active {
  transform: translateY(2px);
  box-shadow: 0 2px 0 var(--primary-bevel);
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-dark);
  cursor: pointer;
  padding: 8px;
}

/* ==========================================================================
   Hero 主視覺區塊
   ========================================================================== */
.hero-section {
  padding: 140px 0 80px;
  position: relative;
  overflow: hidden;
  background: radial-gradient(circle at 10% 20%, #FFF5EB 0%, var(--bg-canvas) 60%),
              radial-gradient(circle at 90% 80%, #E7F6FF 0%, transparent 50%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 48px;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 700;
}

.badge-tag.orange {
  background-color: #FFE5DC;
  color: var(--primary-dark);
}

.badge-tag.blue {
  background-color: var(--secondary-light);
  color: var(--secondary-dark);
}

.badge-tag.green {
  background-color: #D7F4D9;
  color: var(--tertiary-dark);
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--text-dark);
}

.hero-title span {
  color: var(--primary);
  position: relative;
  display: inline-block;
}

.hero-title span::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 0;
  right: 0;
  height: 8px;
  background-color: #FFE082;
  border-radius: 4px;
  z-index: -1;
  opacity: 0.6;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-medium);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 10px;
  flex-wrap: wrap;
}

.btn-appstore {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  background-color: #1A1A1A;
  color: #FFFFFF;
  text-decoration: none;
  padding: 12px 28px;
  border-radius: 16px;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.15);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-appstore:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.22);
}

.btn-appstore-icon {
  font-size: 2rem;
}

.btn-appstore-text {
  display: flex;
  flex-direction: column;
  text-align: left;
}

.btn-appstore-small {
  font-size: 0.75rem;
  opacity: 0.8;
  letter-spacing: 0.5px;
}

.btn-appstore-large {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.1;
}

.btn-outline-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--surface);
  color: var(--secondary-dark);
  text-decoration: none;
  padding: 14px 26px;
  border-radius: 999px;
  font-weight: 700;
  border: 2px solid var(--secondary-light);
  box-shadow: 0 4px 12px rgba(79, 195, 247, 0.15);
  transition: all 0.2s ease;
}

.btn-outline-pill:hover {
  background-color: var(--secondary-light);
  transform: translateY(-2px);
}

.hero-guarantee {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 12px 18px;
  background-color: var(--wood-mat);
  border: 2px dashed var(--wood-border);
  border-radius: 14px;
  margin-top: 8px;
}

.guarantee-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-medium);
}

.guarantee-item i {
  color: var(--tertiary-dark);
}

/* Hero 右側視圖卡片 */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.hero-main-card {
  position: relative;
  width: 100%;
  max-width: 480px;
  background: var(--surface);
  border-radius: 28px;
  padding: 16px;
  box-shadow: var(--shadow-lg);
  border: 4px solid var(--wood-frame);
  transform: rotate(1deg);
  transition: transform 0.3s ease;
}

.hero-main-card:hover {
  transform: rotate(0deg) scale(1.02);
}

.hero-preview-img {
  width: 100%;
  height: auto;
  border-radius: 20px;
  display: block;
}

.hero-icon-floater {
  position: absolute;
  top: -24px;
  left: -24px;
  width: 88px;
  height: 88px;
  border-radius: 22px;
  background: var(--surface);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.15);
  border: 4px solid #FFFFFF;
  padding: 4px;
  animation: floatBounce 4s ease-in-out infinite;
}

.hero-icon-floater img {
  width: 100%;
  height: 100%;
  border-radius: 16px;
  display: block;
}

.hero-star-floater {
  position: absolute;
  bottom: -20px;
  right: -10px;
  background: var(--gold);
  color: #FFFFFF;
  font-weight: 800;
  font-size: 0.9rem;
  padding: 10px 18px;
  border-radius: 999px;
  box-shadow: 0 8px 18px rgba(255, 184, 28, 0.4);
  display: flex;
  align-items: center;
  gap: 8px;
}

@keyframes floatBounce {
  0%, 100% { transform: translateY(0) rotate(-4deg); }
  50% { transform: translateY(-10px) rotate(2deg); }
}

/* ==========================================================================
   區塊共用標題
   ========================================================================== */
.section {
  padding: 90px 0;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}

.section-tag {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
  background-color: var(--secondary-light);
  color: var(--secondary-dark);
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-dark);
  line-height: 1.3;
  margin-bottom: 14px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-medium);
  line-height: 1.6;
}

/* ==========================================================================
   互動迷你拼圖體驗區 (Interactive Mini Puzzle - 對稱高保真)
   ========================================================================== */
.puzzle-demo-box {
  background: var(--surface);
  border-radius: 32px;
  border: 4px solid var(--wood-frame);
  box-shadow: var(--shadow-md);
  padding: 36px;
  max-width: 920px;
  margin: 0 auto;
}

.puzzle-demo-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: stretch;
}

/* 雙欄對稱容器 */
.puzzle-column {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.puzzle-col-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 36px;
}

.puzzle-col-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-dark);
  display: flex;
  align-items: center;
  gap: 8px;
}

.puzzle-col-title i {
  color: var(--primary);
}

.puzzle-col-badge {
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 999px;
  background: #E8F5E9;
  color: var(--tertiary-dark);
  display: flex;
  align-items: center;
  gap: 5px;
}

.puzzle-col-badge.blue {
  background: var(--secondary-light);
  color: var(--secondary-dark);
}

/* 左側：木質拼圖畫布 (1:1 正方形) */
.puzzle-board-container {
  position: relative;
  background: var(--wood-mat);
  border: 4px solid var(--wood-border);
  border-radius: 20px;
  padding: 12px;
  aspect-ratio: 1 / 1;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: inset 0 3px 10px rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease;
}

.puzzle-board-container.completed {
  border-color: var(--gold);
  box-shadow: 0 0 25px rgba(255, 184, 28, 0.5), inset 0 0 15px rgba(255, 215, 0, 0.3);
}

.puzzle-board-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  width: 100%;
  height: 100%;
  gap: 6px;
}

.puzzle-slot {
  background-color: rgba(255, 255, 255, 0.6);
  border: 2px dashed var(--wood-border);
  border-radius: 12px;
  overflow: hidden;
  position: relative;
  transition: all 0.25s ease;
}

.puzzle-slot.filled {
  border: 2px solid transparent;
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.08);
}

/* 右側：雙列碎片托盤 (1:1 正方形，與左側完全等高等寬) */
.puzzle-tray-container {
  background: var(--surface-soft);
  border: 3px solid var(--secondary-light);
  border-radius: 20px;
  padding: 12px;
  aspect-ratio: 1 / 1;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: inset 0 2px 8px rgba(79, 195, 247, 0.08);
}

.puzzle-tray-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  width: 100%;
  height: 100%;
  gap: 12px;
}

.tray-piece {
  background: var(--surface);
  border: 3px solid var(--secondary);
  border-radius: 14px;
  cursor: pointer;
  overflow: hidden;
  box-shadow: 0 6px 14px rgba(79, 195, 247, 0.25);
  transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.tray-piece:hover {
  transform: translateY(-4px) scale(1.05);
  border-color: var(--primary);
  box-shadow: 0 10px 22px rgba(255, 138, 101, 0.35);
}

.tray-piece.placed {
  opacity: 0.18;
  pointer-events: none;
  filter: grayscale(1);
  border-color: var(--wood-border);
  box-shadow: none;
  transform: none;
}

/* 共通拼圖真圖切片 (2x2 象限分割) */
.slot-tile, .piece-tile {
  width: 100%;
  height: 100%;
  background-image: url('../assets/app_icon.png');
  background-size: 200% 200%;
  background-repeat: no-repeat;
  display: block;
}

/* 象限位置對應 */
.tile-0 { background-position: 0% 0%; }       /* 左上：小熊左耳與金色拼圖塊 */
.tile-1 { background-position: 100% 0%; }     /* 右上：小熊右耳與背景 */
.tile-2 { background-position: 0% 100%; }     /* 左下：小熊左側臉龐與口袋車縫線 */
.tile-3 { background-position: 100% 100%; }   /* 右下：小熊右側臉龐與微笑刺繡 */

/* 槽位內的切片預設為半透明底圖引導 */
.slot-tile {
  opacity: 0.22;
  filter: grayscale(0.2);
  transition: opacity 0.3s ease, transform 0.25s ease;
}

.puzzle-board-container.hide-guide .slot-tile:not(.snapped) {
  opacity: 0 !important;
}

.puzzle-slot.filled .slot-tile {
  opacity: 1 !important;
  filter: none !important;
  transform: scale(1);
  animation: snapBounce 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes snapBounce {
  0% { transform: scale(1.15); }
  60% { transform: scale(0.96); }
  100% { transform: scale(1); }
}

/* 底部對稱控制與狀態列 */
.puzzle-col-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 46px;
  padding: 0 16px;
  background: #E8F5E9;
  border-radius: 12px;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--tertiary-dark);
}

.btn-toggle-guide, .btn-reset-demo {
  background: var(--surface);
  border: 2px solid var(--wood-border);
  color: var(--text-dark);
  padding: 6px 14px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s ease;
}

.btn-toggle-guide:hover, .btn-reset-demo:hover {
  background: var(--wood-mat);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-1px);
}

/* ==========================================================================
   核心特色 (Features Grid)
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--surface);
  border-radius: 24px;
  padding: 32px 28px;
  box-shadow: var(--shadow-sm);
  border: 3px solid var(--wood-frame);
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: all 0.25s ease;
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

.feature-icon-wrapper {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
}

.feature-icon-wrapper.orange {
  background-color: #FFE5DC;
  color: var(--primary);
}

.feature-icon-wrapper.blue {
  background-color: var(--secondary-light);
  color: var(--secondary-dark);
}

.feature-icon-wrapper.green {
  background-color: #D7F4D9;
  color: var(--tertiary-dark);
}

.feature-icon-wrapper.yellow {
  background-color: #FFF3CD;
  color: var(--gold);
}

.feature-card-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-dark);
}

.feature-card-desc {
  font-size: 0.95rem;
  color: var(--text-medium);
  line-height: 1.6;
}

/* ==========================================================================
   精彩遊戲畫面 (Screenshots Showcase)
   ========================================================================== */
.screenshots-section {
  background-color: var(--surface-soft);
  position: relative;
}

.screenshot-tabs {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.screen-tab-btn {
  background: var(--surface);
  border: 2px solid var(--wood-border);
  color: var(--text-dark);
  padding: 10px 22px;
  border-radius: 999px;
  font-weight: 700;
  cursor: pointer;
  font-size: 0.95rem;
  transition: all 0.2s ease;
}

.screen-tab-btn.active {
  background-color: var(--primary);
  color: #FFFFFF;
  border-color: var(--primary);
  box-shadow: 0 4px 10px rgba(255, 138, 101, 0.35);
}

.screenshot-viewport {
  max-width: 960px;
  margin: 0 auto;
  background: var(--surface);
  border-radius: 28px;
  border: 5px solid var(--wood-frame);
  box-shadow: var(--shadow-lg);
  padding: 16px;
  overflow: hidden;
}

.screenshot-display-img {
  width: 100%;
  height: auto;
  border-radius: 18px;
  display: block;
  transition: opacity 0.3s ease;
}

.screenshot-caption {
  text-align: center;
  margin-top: 18px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-medium);
}

/* ==========================================================================
   家長安心保證 (Safety Commitment)
   ========================================================================== */
.safety-banner {
  background: linear-gradient(135deg, #FFF8E1 0%, #E8F5E9 100%);
  border-radius: 32px;
  border: 4px solid #C8E6C9;
  padding: 48px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.safety-content h3 {
  font-size: 2rem;
  font-weight: 800;
  color: #1B5E20;
  margin-bottom: 16px;
}

.safety-content p {
  font-size: 1.05rem;
  color: var(--text-medium);
  margin-bottom: 24px;
}

.safety-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.safety-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1rem;
  font-weight: 700;
  color: #2E7D32;
}

.safety-list li i {
  color: #43A047;
  font-size: 1.2rem;
}

.safety-visual {
  background: var(--surface);
  padding: 32px;
  border-radius: 24px;
  box-shadow: var(--shadow-md);
  text-align: center;
}

.safety-badge-large {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  background: #E8F5E9;
  color: #2E7D32;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  margin: 0 auto 18px;
}

.safety-visual h4 {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.safety-visual p {
  font-size: 0.95rem;
  color: var(--text-medium);
}

/* ==========================================================================
   常見問題 (FAQ Accordion)
   ========================================================================== */
.faq-container {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--surface);
  border-radius: 18px;
  border: 2px solid var(--wood-frame);
  overflow: hidden;
  transition: all 0.2s ease;
}

.faq-item.active {
  border-color: var(--secondary);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  width: 100%;
  padding: 22px 24px;
  text-align: left;
  background: none;
  border: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-dark);
  cursor: pointer;
}

.faq-icon {
  transition: transform 0.3s ease;
  color: var(--secondary-dark);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 24px;
  color: var(--text-medium);
  font-size: 0.95rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 200px;
  padding: 0 24px 22px;
}

/* ==========================================================================
   下載號召區 (Download CTA)
   ========================================================================== */
.download-section {
  padding: 80px 0;
}

.download-card {
  background: radial-gradient(circle at 100% 0%, #FFCC80 0%, var(--primary) 100%);
  border-radius: 36px;
  padding: 60px 40px;
  text-align: center;
  color: #FFFFFF;
  box-shadow: 0 20px 40px rgba(255, 138, 101, 0.35);
  position: relative;
  overflow: hidden;
}

.download-title {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.download-desc {
  font-size: 1.15rem;
  max-width: 600px;
  margin: 0 auto 32px;
  opacity: 0.95;
}

.download-card .btn-appstore {
  background: #FFFFFF;
  color: var(--text-dark);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.download-card .btn-appstore:hover {
  background: #FAF6ED;
}

.download-specs {
  margin-top: 24px;
  font-size: 0.85rem;
  opacity: 0.85;
}

/* ==========================================================================
   頁腳 (Footer)
   ========================================================================== */
.footer {
  background-color: var(--wood-mat);
  border-top: 2px solid var(--wood-frame);
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer-brand-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--primary-dark);
}

.footer-desc {
  font-size: 0.9rem;
  color: var(--text-medium);
  line-height: 1.6;
}

.footer-col-title {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 16px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  text-decoration: none;
  color: var(--text-medium);
  font-size: 0.9rem;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: var(--primary);
}

.footer-bottom {
  border-top: 1px solid var(--wood-border);
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-light);
}

/* ==========================================================================
   子頁面共用樣式 (Legal / Support Pages)
   ========================================================================== */
.page-header {
  padding: 130px 0 50px;
  background: radial-gradient(circle at 50% 20%, #FFF5EB 0%, var(--bg-canvas) 80%);
  text-align: center;
  border-bottom: 2px solid var(--wood-frame);
}

.page-title {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 10px;
}

.page-subtitle {
  font-size: 1.05rem;
  color: var(--text-medium);
}

.content-box {
  background: var(--surface);
  border-radius: 28px;
  border: 3px solid var(--wood-frame);
  box-shadow: var(--shadow-sm);
  padding: 48px;
  margin: 50px auto;
  max-width: 900px;
}

.legal-section {
  margin-bottom: 36px;
}

.legal-section h3 {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--primary-dark);
  margin-bottom: 12px;
  border-bottom: 2px solid var(--primary-light);
  padding-bottom: 6px;
}

.legal-section p, .legal-section li {
  font-size: 0.95rem;
  color: var(--text-medium);
  line-height: 1.8;
  margin-bottom: 10px;
}

.legal-section ul {
  padding-left: 24px;
  margin-bottom: 12px;
}

.support-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}

.support-card {
  background: var(--surface-soft);
  border: 2px solid var(--secondary-light);
  border-radius: 20px;
  padding: 24px;
  text-align: center;
}

.support-card-icon {
  font-size: 2.5rem;
  color: var(--secondary);
  margin-bottom: 12px;
}

.support-form {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  text-align: left;
}

.form-label {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-dark);
}

.form-input, .form-textarea {
  width: 100%;
  padding: 12px 16px;
  border-radius: 12px;
  border: 2px solid var(--wood-frame);
  font-family: inherit;
  font-size: 0.95rem;
  background-color: var(--bg-canvas);
  transition: border-color 0.2s ease;
}

.form-input:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  background-color: #FFFFFF;
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.btn-submit {
  align-self: flex-start;
  background-color: var(--primary);
  color: #FFFFFF;
  border: none;
  padding: 14px 32px;
  border-radius: 999px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 4px 0 var(--primary-bevel);
  transition: all 0.15s ease;
}

.btn-submit:hover {
  background-color: #FF9A78;
  transform: translateY(-2px);
}

/* ==========================================================================
   響應式設計 (RWD Breakpoints)
   ========================================================================== */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-content {
    align-items: center;
  }
  .hero-actions {
    justify-content: center;
  }
  .hero-guarantee {
    justify-content: center;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .puzzle-demo-layout {
    grid-template-columns: 1fr;
  }
  .safety-banner {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  .mobile-toggle {
    display: block;
  }
  .hero-title {
    font-size: 2.25rem;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .support-cards {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .content-box {
    padding: 24px;
  }
}