/* ==========================================================================
   Vibe Coding 課程網頁 - 樣式表 (style.css) - 米白色極致優雅版
   本樣式表專為初學者設計，將原本的暗黑科技風格全面升級為溫暖高雅的米白色，
   運用象牙米白、晨光極光與白磨砂玻璃，呈現世界級的 Premium 設計質感。
   ========================================================================== */

/* 1. 字體與基礎設定 */
@import url('https://fonts.googleapis.com/css2?family=Zen+Maru+Gothic:wght@300;400;500;700;900&family=JetBrains+Mono:ital,wght@0,100..800;1,100..800&family=Noto+Sans+TC:wght@300;400;500;700;900&display=swap');

:root {
  /* 品牌色彩系統 - 高階科技藍與清新冰藍風格 (符合使用者指定的 #3A6AD9) */
  --bg-dark: #f0f4f8;          /* 帶有冰藍色調的高雅亮白背景，視覺更清新 */
  --bg-card: rgba(255, 255, 255, 0.88); /* 溫暖的白磨砂玻璃卡片背景 */
  --border-color: rgba(58, 106, 217, 0.08); /* 以主色為基礎的精細透明邊框 */
  
  /* 核心品牌色、漸層色與點綴色（符合 WCAG AA 對比標準） */
  --primary-glow: #3A6AD9;     /* 核心品牌色 - 皇家科技藍 */
  --primary-rgb: 58, 106, 217;   /* 主色 RGB 數值，方便 rgba 調配陰影 */
  --secondary-glow: #54B4EB;   /* 輔助漸層色 - 夢幻極光藍 */
  --accent-glow: #E85D75;      /* 醒目點綴色 - 青春珊瑚粉紅 */
  --accent-rgb: 232, 93, 117;    /* 點綴色 RGB 數值，方便 rgba 調配陰影 */
  --accent-orange: #FFB84C;    /* 輔助提醒色 - 亮金黃 */
  
  /* 文字顏色（高對比度無障礙規格） */
  --text-main: #1D263B;        /* 主要沉穩深藍灰字（提供極佳閱讀對比度，大於 7:1） */
  --text-muted: #5C6B84;       /* 輔助暖藍灰字 */
  --text-dark: #f0f4f8;        /* 淺色文字（適用於深色背景容器） */
  
  /* 其他規格 */
  --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --border-radius: 16px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Zen Maru Gothic', 'Noto Sans TC', sans-serif;
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  overflow-x: hidden;
  line-height: 1.6;
}

/* 2. 背景粒子與晨曦微光特效 */
.aurora-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -2;
  overflow: hidden;
  background: radial-gradient(circle at 10% 20%, rgba(248, 247, 255, 1) 0%, rgba(243, 240, 250, 1) 90%);
}

.glow-orb {
  position: absolute;
  width: 650px;
  height: 650px;
  border-radius: 50%;
  filter: blur(140px);
  opacity: 0.22;  /* 淺色背景下稍微加深透明度，呈現優雅的晨光感 */
  pointer-events: none;
}

.orb-1 {
  background: radial-gradient(circle, var(--accent-orange) 0%, rgba(255, 255, 255, 0) 70%);
  top: -200px;
  right: -100px;
  animation: orbMovement 25s infinite alternate;
}

.orb-2 {
  background: radial-gradient(circle, var(--secondary-glow) 0%, rgba(255, 255, 255, 0) 70%);
  bottom: -200px;
  left: -100px;
  animation: orbMovement 20s infinite alternate-reverse;
}

@keyframes orbMovement {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(80px, 50px) scale(1.1); }
  100% { transform: translate(-40px, -80px) scale(0.9); }
}

/* 3. 頂部導覽列 (Navbar) */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 20px 8%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 100;
  background: rgba(248, 247, 255, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition-smooth);
}

header.scrolled {
  padding: 15px 8%;
  background: rgba(243, 240, 250, 0.9);
  box-shadow: 0 10px 30px rgba(108, 99, 255, 0.04);
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: 1px;
  background: linear-gradient(135deg, var(--primary-glow) 0%, var(--accent-glow) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo i {
  color: var(--primary-glow);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 30px;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 600;
  transition: var(--transition-smooth);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-glow), var(--accent-glow));
  transition: var(--transition-smooth);
}

.nav-links a:hover {
  color: var(--text-main);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-cta {
  background: linear-gradient(90deg, var(--primary-glow), var(--secondary-glow));
  color: #ffffff;
  border: none;
  padding: 10px 20px;
  font-size: 0.9rem;
  font-weight: 700;
  border-radius: 30px;
  cursor: pointer;
  transition: var(--transition-smooth);
  box-shadow: 0 4px 15px rgba(var(--primary-rgb), 0.2);
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(var(--primary-rgb), 0.4);
}

/* 4. 全域按鈕與通用元件 */
.btn-glow {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(90deg, var(--primary-glow) 0%, var(--accent-glow) 100%);
  color: #fff;
  border: none;
  padding: 16px 36px;
  font-size: 1.1rem;
  font-weight: 700;
  border-radius: 50px;
  cursor: pointer;
  text-decoration: none;
  transition: var(--transition-smooth);
  box-shadow: 0 4px 20px rgba(var(--accent-rgb), 0.15);
  z-index: 1;
  overflow: hidden;
}

.btn-glow::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: 0.5s;
  z-index: -1;
}

.btn-glow:hover::before {
  left: 100%;
}

.btn-glow:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(var(--primary-rgb), 0.35);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: transparent;
  color: var(--text-main);
  border: 1px solid rgba(0, 0, 0, 0.1);
  padding: 16px 36px;
  font-size: 1.1rem;
  font-weight: 600;
  border-radius: 50px;
  cursor: pointer;
  text-decoration: none;
  transition: var(--transition-smooth);
}

.btn-secondary:hover {
  border-color: var(--primary-glow);
  background: rgba(var(--primary-rgb), 0.04);
}

/* 5. 英雄視覺區 (Hero Section) */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 8% 60px 8%;
  position: relative;
}

.hero-container {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 60px;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid var(--border-color);
  padding: 8px 16px;
  border-radius: 30px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary-glow);
  margin-bottom: 25px;
  box-shadow: 0 4px 10px rgba(120, 110, 90, 0.02);
}

.hero-badge i {
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.1); opacity: 1; }
  100% { transform: scale(1); opacity: 0.5; }
}

.hero-title {
  font-size: 3.8rem;
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 25px;
}

.hero-title span.glow {
  background: linear-gradient(135deg, var(--primary-glow) 0%, var(--accent-glow) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.typed-cursor {
  color: var(--accent-glow);
  animation: blink 0.7s infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.hero-desc {
  font-size: 1.2rem;
  color: var(--text-muted);
  margin-bottom: 40px;
  max-width: 600px;
}

.hero-actions {
  display: flex;
  gap: 20px;
}

/* 英雄右側：高質感 VS Code Light 風格燕麥白代碼框 */
.hero-visual {
  position: relative;
}

.code-box {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 24px;
  box-shadow: 0 20px 45px rgba(120, 110, 90, 0.06);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
}

.code-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-glow), var(--accent-glow));
}

.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.code-dots {
  display: flex;
  gap: 6px;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.dot-red { background-color: #ff5f56; }
.dot-yellow { background-color: #ffbd2e; }
.dot-green { background-color: #27c93f; }

.code-title {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: monospace;
  font-weight: 600;
}

.code-content {
  font-family: 'JetBrains Mono', 'Courier New', Courier, monospace;
  font-size: 0.9rem;
  line-height: 1.6;
}

.code-line {
  display: flex;
  gap: 15px;
}

.line-num {
  color: rgba(0, 0, 0, 0.25);
  width: 20px;
  text-align: right;
  user-select: none;
}

.code-text {
  color: var(--text-main);
}

/* 亮色主題精緻語法高亮 */
.keyword { color: #db2777; font-weight: bold; }
.string { color: #0d9488; }
.comment { color: #94a3b8; font-style: italic; }
.function { color: #0284c7; font-weight: 600; }

/* 6. Section 共同樣式 */
section {
  padding: 100px 8%;
  max-width: 1200px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-tag {
  font-size: 0.85rem;
  color: var(--primary-glow);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 10px;
  display: block;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
}

.section-title span {
  background: linear-gradient(90deg, var(--primary-glow), var(--accent-glow));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* 7. 特色區塊 (Features) */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 40px 30px;
  border-radius: var(--border-radius);
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(120, 110, 90, 0.02);
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(var(--primary-rgb), 0.03), rgba(var(--accent-rgb), 0.03));
  opacity: 0;
  transition: var(--transition-smooth);
}

.feature-card:hover {
  transform: translateY(-10px);
  border-color: rgba(var(--primary-rgb), 0.2);
  box-shadow: 0 20px 40px rgba(120, 110, 90, 0.06);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon {
  width: 60px;
  height: 60px;
  background: rgba(0, 0, 0, 0.02);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: var(--primary-glow);
  margin-bottom: 25px;
  transition: var(--transition-smooth);
}

.feature-card:hover .feature-icon {
  background: linear-gradient(135deg, var(--primary-glow), var(--secondary-glow));
  color: #ffffff;
  box-shadow: 0 4px 15px rgba(var(--primary-rgb), 0.3);
}

.feature-card h3 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 15px;
}

.feature-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* 8. 互動 Vibe 模擬體驗區 (Interactive Section) */
.vibe-simulator {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 50px;
  box-shadow: 0 30px 60px rgba(120, 110, 90, 0.05);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.sim-container {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 50px;
  align-items: center;
}

.sim-controls h3 {
  font-size: 1.8rem;
  margin-bottom: 15px;
}

.sim-controls p {
  color: var(--text-muted);
  margin-bottom: 30px;
}

.vibe-options {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.vibe-btn {
  background: rgba(0, 0, 0, 0.02);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 15px 25px;
  border-radius: 12px;
  text-align: left;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: var(--transition-smooth);
}

.vibe-btn i {
  font-size: 1.2rem;
  opacity: 0.5;
  transition: var(--transition-smooth);
}

.vibe-btn:hover {
  background: rgba(0, 0, 0, 0.04);
  border-color: var(--primary-glow);
}

.vibe-btn.active {
  background: linear-gradient(90deg, rgba(var(--primary-rgb), 0.08) 0%, rgba(var(--accent-rgb), 0.08) 100%);
  border-color: var(--primary-glow);
  box-shadow: 0 4px 15px rgba(var(--primary-rgb), 0.05);
}

.vibe-btn.active i {
  color: var(--primary-glow);
  opacity: 1;
  transform: translateX(5px);
}

/* 模擬體驗成果預覽（白底風格） */
.sim-preview {
  position: relative;
}

.preview-window {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 16px;
  overflow: hidden;
  height: 380px;
  box-shadow: 0 15px 40px rgba(120, 110, 90, 0.05);
  display: flex;
  flex-direction: column;
  transition: var(--transition-smooth);
}

.window-header {
  background: #f1efe9;
  padding: 12px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
}

.window-title {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.window-body {
  flex-grow: 1;
  padding: 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  transition: var(--transition-smooth);
}

/* 預覽模式 1: Cyberpunk（保持黑夜反差，以凸顯 Vibe 瞬間切換效果！） */
.preview-window.vibe-cyberpunk .window-body {
  background: radial-gradient(circle, #250938 0%, #0a0210 100%);
  border: 2px solid var(--accent-glow);
}
.preview-window.vibe-cyberpunk .preview-card {
  background: rgba(10, 2, 16, 0.8);
  border: 2px solid var(--accent-glow);
  padding: 25px;
  border-radius: 0px; 
  box-shadow: 0 0 20px var(--accent-glow);
  color: #00f2fe;
}
.preview-window.vibe-cyberpunk .preview-title {
  font-family: 'Courier New', Courier, monospace;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 3px;
  text-shadow: 0 0 10px #00f2fe;
}

/* 預覽模式 2: Zen Mode（高雅紙白） */
.preview-window.vibe-zen .window-body {
  background: #fdfdfc;
  color: #2c3e50;
}
.preview-window.vibe-zen .preview-card {
  background: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.05);
  padding: 30px;
  border-radius: 30px; 
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.03);
  color: #2c3e50;
  max-width: 320px;
}
.preview-window.vibe-zen .preview-title {
  font-family: 'Georgia', serif;
  font-weight: 400;
  color: #2c3e50;
}

/* 預覽模式 3: Neo Retro（亮麗活力黃） */
.preview-window.vibe-retro .window-body {
  background: #fcf6e8;
  color: #000;
}
.preview-window.vibe-retro .preview-card {
  background: #ffeb3b;
  border: 4px solid #000;
  padding: 25px;
  border-radius: 12px;
  box-shadow: 8px 8px 0px #000;
  color: #000;
}
.preview-window.vibe-retro .preview-title {
  font-weight: 800;
  text-transform: uppercase;
}

.preview-card p {
  margin-top: 10px;
  font-size: 0.9rem;
}

.vibe-indicator {
  position: absolute;
  bottom: -20px;
  right: -20px;
  background: linear-gradient(135deg, var(--accent-glow), var(--accent-orange));
  color: #fff;
  padding: 8px 16px;
  border-radius: 30px;
  font-size: 0.8rem;
  font-weight: 800;
  box-shadow: 0 5px 15px rgba(var(--accent-rgb), 0.3);
}

/* 9. 課程大綱 (Curriculum) */
.timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
}

.timeline::after {
  content: '';
  position: absolute;
  width: 2px;
  background: var(--border-color);
  top: 0;
  bottom: 0;
  left: 50%;
  margin-left: -1px;
}

.timeline-item {
  padding: 10px 40px;
  position: relative;
  background-color: inherit;
  width: 50%;
}

.timeline-item::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  right: -10px;
  background-color: var(--bg-dark);
  border: 4px solid var(--primary-glow);
  top: 15px;
  border-radius: 50%;
  z-index: 1;
  transition: var(--transition-smooth);
}

.left {
  left: 0;
}

.right {
  left: 50%;
}

.right::after {
  left: -10px;
}

.timeline-content {
  padding: 30px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  position: relative;
  border-radius: var(--border-radius);
  transition: var(--transition-smooth);
  box-shadow: 0 8px 25px rgba(120, 110, 90, 0.02);
}

.timeline-content:hover {
  border-color: rgba(var(--primary-rgb), 0.2);
  box-shadow: 0 10px 25px rgba(120, 110, 90, 0.05);
}

.timeline-item:hover::after {
  background-color: var(--primary-glow);
  box-shadow: 0 0 10px var(--primary-glow);
}

.timeline-step {
  color: var(--accent-glow);
  font-weight: 800;
  font-size: 0.85rem;
  margin-bottom: 10px;
  display: block;
}

.timeline-content h3 {
  font-size: 1.3rem;
  margin-bottom: 10px;
}

.timeline-content p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* 10. 金牌講師介紹 (Instructor Section) */
.instructor-container {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 50px;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 50px;
  border-radius: 24px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 30px 60px rgba(120, 110, 90, 0.04);
}

.instructor-avatar-side {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
}

.avatar-glow-ring {
  position: absolute;
  width: 250px;
  height: 250px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-orange), var(--secondary-glow));
  filter: blur(25px);
  opacity: 0.25;  /* 淺色下優雅的晨曦背光光暈 */
  animation: rotateGlow 8s infinite linear;
}

@keyframes rotateGlow {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.instructor-avatar {
  position: relative;
  width: 230px;
  height: 230px;
  border-radius: 50%;
  background: radial-gradient(circle, #ffffff 0%, #fbfaf8 100%);
  border: 3px solid rgba(0, 0, 0, 0.05);
  display: flex;
  justify-content: center;
  align-items: center;
  box-shadow: inset 0 0 20px rgba(var(--primary-rgb), 0.05);
  z-index: 2;
  transition: var(--transition-smooth);
  overflow: hidden; /* 確保照片在放大時不會溢出圓形外框 */
}

.instructor-avatar:hover {
  transform: scale(1.03);
  border-color: var(--primary-glow);
}

.instructor-avatar img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover; /* 保持相片完美長寬比不被變形擠壓 */
  transition: var(--transition-smooth);
}

.instructor-avatar:hover img {
  transform: scale(1.08); /* 滑鼠懸停時相片平滑放大，呈現高雅互動感 */
}

.instructor-avatar span {
  font-size: 2.8rem;
  font-weight: 900;
  letter-spacing: 2px;
  background: linear-gradient(135deg, var(--primary-glow) 0%, var(--accent-glow) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 10px rgba(var(--primary-rgb), 0.15);
}

.instructor-info-side {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.instructor-title-group h3 {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 5px;
}

.title-sub {
  color: var(--primary-glow);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 1px;
}

.instructor-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 5px;
}

.badge-item {
  background: rgba(0, 0, 0, 0.02);
  border: 1px solid var(--border-color);
  padding: 6px 14px;
  border-radius: 30px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition-smooth);
}

.badge-item:hover {
  border-color: var(--primary-glow);
  color: var(--text-main);
  background: rgba(var(--primary-rgb), 0.05);
}

.badge-item i {
  color: var(--primary-glow);
}

.instructor-bio {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.8;
}

.instructor-quote {
  border-left: 3px solid var(--accent-glow);
  padding-left: 20px;
  margin-top: 10px;
  position: relative;
}

.instructor-quote i {
  font-size: 2rem;
  color: rgba(var(--accent-rgb), 0.05);
  position: absolute;
  top: -10px;
  left: 10px;
}

.instructor-quote p {
  font-style: italic;
  color: var(--text-main);
  font-size: 0.95rem;
  position: relative;
  z-index: 1;
}

/* 11. 學員見證 (Testimonials) */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 40px;
  border-radius: var(--border-radius);
  position: relative;
  box-shadow: 0 10px 30px rgba(120, 110, 90, 0.02);
}

.testimonial-quote {
  font-size: 1.6rem;
  color: rgba(0, 0, 0, 0.03);
  position: absolute;
  top: 20px;
  left: 20px;
}

.testimonial-text {
  font-size: 1rem;
  color: var(--text-main);
  margin-bottom: 30px;
  position: relative;
  z-index: 1;
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 15px;
}

.user-avatar {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-glow), var(--accent-glow));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #ffffff;
}

.user-info h4 {
  font-size: 1rem;
  font-weight: 700;
}

.user-info p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* 12. 立即報名表單 (Enroll Section) */
.enroll-container {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 60px;
  border-radius: 24px;
  box-shadow: 0 25px 50px rgba(120, 110, 90, 0.04);
}

.enroll-info h2 {
  font-size: 2.2rem;
  margin-bottom: 20px;
}

.enroll-info p {
  color: var(--text-muted);
  margin-bottom: 40px;
}

.price-card {
  background: rgba(0, 0, 0, 0.01);
  border: 1px solid var(--border-color);
  padding: 30px;
  border-radius: 16px;
  margin-bottom: 20px;
}

.price-tag {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--primary-glow);
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 10px;
}

.price-tag span {
  font-size: 1rem;
  color: var(--text-muted);
  font-weight: 400;
  text-decoration: line-through;
}

.price-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* 表單樣式 */
.enroll-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

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

.form-group label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted);
}

.form-group input, .form-group select {
  background: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.1);
  padding: 14px 20px;
  border-radius: 10px;
  color: var(--text-main);
  font-size: 1rem;
  transition: var(--transition-smooth);
}

.form-group input:focus, .form-group select:focus {
  outline: none;
  border-color: var(--primary-glow);
  box-shadow: 0 0 15px rgba(var(--primary-rgb), 0.1);
  background: #ffffff;
}

/* 自訂下拉選單 option */
.form-group select option {
  background-color: #ffffff;
  color: var(--text-main);
}

.submit-btn {
  background: linear-gradient(90deg, var(--primary-glow) 0%, var(--accent-glow) 100%);
  color: #fff;
  border: none;
  padding: 16px;
  font-size: 1.1rem;
  font-weight: 700;
  border-radius: 10px;
  cursor: pointer;
  transition: var(--transition-smooth);
  box-shadow: 0 4px 15px rgba(var(--accent-rgb), 0.15);
}

.submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(var(--primary-rgb), 0.3);
}

/* 13. 頁尾區 (Footer) */
footer {
  background: #f0eef5;
  border-top: 1px solid var(--border-color);
  padding: 60px 8% 30px 8%;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.footer-logo {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-main);
}

.footer-socials {
  display: flex;
  gap: 20px;
}

.footer-socials a {
  width: 40px;
  height: 40px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 1.1rem;
  text-decoration: none;
  transition: var(--transition-smooth);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
}

.footer-socials a:hover {
  border-color: var(--primary-glow);
  color: var(--primary-glow);
  transform: translateY(-3px);
}

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* 14. 響應式斷點設計 (Responsive Layout) */
@media (max-width: 992px) {
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }
  .hero-desc {
    margin: 0 auto 40px auto;
  }
  .hero-actions {
    justify-content: center;
  }
  .hero-title {
    font-size: 3rem;
  }
  .timeline::after {
    left: 31px;
  }
  .timeline-item {
    width: 100%;
    padding-left: 70px;
    padding-right: 25px;
  }
  .timeline-item::after {
    left: 21px;
  }
  .right {
    left: 0%;
  }
  .sim-container {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .instructor-container {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 40px 30px;
    text-align: center;
  }
  .instructor-quote {
    border-left: none;
    border-top: 3px solid var(--accent-glow);
    padding-left: 0;
    padding-top: 20px;
  }
  .instructor-badges {
    justify-content: center;
  }
  .enroll-container {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  header {
    padding: 15px 5%;
  }
  .nav-links {
    display: none; /* 簡化移動端導覽 */
  }
}

@media (max-width: 576px) {
  .hero-title {
    font-size: 2.3rem;
  }
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  .btn-glow, .btn-secondary {
    width: 100%;
    justify-content: center;
  }
  .sim-preview {
    width: 100%;
  }
  .preview-window {
    height: 320px;
  }
  .window-body {
    padding: 20px;
  }
  .enroll-container {
    padding: 30px 20px;
  }
}