/* ==========================================
   全站樣式表 - style.css
   設計風格：極客科技暗黑風 (Dark Tech Theme)
   ========================================== */

/* 匯入 Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@300;400;500;600;700;800&display=swap');

/* 全域變數定義 */
:root {
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-title: 'Outfit', sans-serif;
  
  /* 色彩系統 */
  --bg-main: #060913;          /* 深邃主背景 */
  --bg-card: #0d1326;          /* 卡片背景 */
  --bg-nav: rgba(6, 9, 19, 0.75); /* 導覽列半透明背景 */
  
  --primary: #0072ff;          /* 中華電信藍 */
  --secondary: #00f2fe;        /* 極光青色 */
  --accent: #9d4edd;           /* 科技霓虹紫 */
  
  --text-main: #f8fafc;        /* 主文字 */
  --text-muted: #94a3b8;       /* 次要文字 */
  --text-dark: #0f172a;        /* 暗色背景文字 */
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(0, 242, 254, 0.15);
  
  --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  --gradient-accent: linear-gradient(135deg, var(--secondary) 0%, var(--accent) 100%);
  --gradient-dark: linear-gradient(180deg, #0d1326 0%, #060913 100%);
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.5);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 20px rgba(0, 242, 254, 0.25);
  
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-bounce: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  
  --border-radius-sm: 8px;
  --border-radius-md: 16px;
  --border-radius-lg: 24px;

  /* 補充缺失相容變數 */
  --surface-light: #0d1326;
  --surface-color: #0d1326;
  --text-color: #f8fafc;
  --primary-color: #0072ff;
}

/* 重設基礎樣式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition-fast);
}

ul {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* 滾動條美化 */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-main);
}

::-webkit-scrollbar-thumb {
  background: #1e293b;
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary);
}

/* 共用元件與容器 */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
  position: relative;
}

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

.section-title {
  font-family: var(--font-title);
  font-size: 2.5rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 16px;
  display: inline-block;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

/* 按鈕樣式 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-family: var(--font-title);
  font-weight: 600;
  font-size: 1rem;
  border-radius: 50px;
  transition: all var(--transition-normal);
  cursor: pointer;
  border: none;
  gap: 8px;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--text-dark);
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(0, 242, 254, 0.45);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--secondary);
  transform: translateY(-2px);
}

/* 標記與標籤 */
.badge {
  display: inline-block;
  padding: 6px 14px;
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: 50px;
  background: rgba(0, 242, 254, 0.1);
  border: 1px solid rgba(0, 242, 254, 0.2);
  color: var(--secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 16px;
}

/* ==========================================
   1. Header 導覽列
   ========================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 20px 0;
  transition: all var(--transition-normal);
}

.header.scrolled {
  padding: 12px 0;
  background-color: var(--bg-nav);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-family: var(--font-title);
  font-size: 1.5rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-icon {
  background: var(--gradient-primary);
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  -webkit-text-fill-color: var(--text-dark);
  font-weight: bold;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
  overflow: visible;
}

.nav-link {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.nav-link:hover, .nav-link.active {
  color: var(--text-main);
  text-shadow: 0 0 10px rgba(0, 242, 254, 0.5);
}

.nav-btn {
  padding: 8px 20px;
  font-size: 0.9rem;
}

/* 手機版選單切換按鈕 */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ==========================================
   2. Hero Section 區塊
   ========================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 120px;
  background: radial-gradient(circle at 80% 20%, rgba(0, 114, 255, 0.15) 0%, rgba(6, 9, 19, 0) 50%),
              radial-gradient(circle at 10% 80%, rgba(157, 78, 221, 0.12) 0%, rgba(6, 9, 19, 0) 50%);
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-title {
  font-family: var(--font-title);
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 24px;
}

.hero-title span {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: block;
}

.hero-desc {
  color: var(--text-muted);
  font-size: 1.2rem;
  margin-bottom: 40px;
  max-width: 580px;
}

.hero-btns {
  display: flex;
  gap: 16px;
  margin-bottom: 40px;
}

.hero-stats {
  display: flex;
  gap: 40px;
  border-top: 1px solid var(--border-color);
  padding-top: 30px;
}

.stat-item h3 {
  font-family: var(--font-title);
  font-size: 2rem;
  font-weight: 700;
  color: var(--secondary);
}

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

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

.hero-image-wrapper {
  position: relative;
  width: 100%;
  max-width: 450px;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-glow);
  border: 1px solid rgba(0, 242, 254, 0.2);
}

.hero-image-wrapper::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, rgba(6, 9, 19, 0) 60%, rgba(6, 9, 19, 0.8) 100%);
  pointer-events: none;
}

/* ==========================================
   3. Core Features 核心特色
   ========================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 40px 30px;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: var(--transition-normal);
}

.feature-card:hover {
  transform: translateY(-8px);
  border-color: rgba(0, 242, 254, 0.3);
  box-shadow: var(--shadow-md), 0 10px 30px rgba(0, 114, 255, 0.05);
}

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

.feature-icon {
  width: 60px;
  height: 60px;
  border-radius: 12px;
  background: rgba(0, 114, 255, 0.1);
  color: var(--secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin-bottom: 24px;
}

.feature-card h3 {
  font-family: var(--font-title);
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 16px;
}

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

/* ==========================================
   4. Protocol & Clients 協議與客戶端
   ========================================== */
.protocol-section {
  background: var(--gradient-dark);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.protocol-box {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 60px;
  align-items: center;
}

.protocol-text h3 {
  font-family: var(--font-title);
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-main);
}

.protocol-text p {
  color: var(--text-muted);
  margin-bottom: 20px;
}

.protocol-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 30px;
}

.tag {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  padding: 6px 14px;
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.clients-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.client-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: var(--transition-normal);
}

.client-card.recommended {
  border-color: rgba(0, 242, 254, 0.4);
  background: linear-gradient(90deg, rgba(0, 242, 254, 0.03) 0%, rgba(6, 9, 19, 0) 100%);
  position: relative;
}

.client-card.recommended::after {
  content: '推薦使用';
  position: absolute;
  top: -10px;
  right: 20px;
  background: var(--gradient-primary);
  color: var(--text-dark);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: 50px;
}

.client-card:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--primary);
  transform: translateX(5px);
}

.client-info {
  display: flex;
  align-items: center;
  gap: 20px;
}

.client-logo {
  width: 48px;
  height: 48px;
  background: rgba(0, 242, 254, 0.1);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--secondary);
}

.client-details h4 {
  font-family: var(--font-title);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.client-details p {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.client-download {
  display: flex;
  gap: 10px;
}

.download-link {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 6px;
}

.download-link:hover {
  background: var(--gradient-primary);
  color: var(--text-dark);
  border-color: transparent;
}

/* ==========================================
   5. Subscription Plans 訂閱方案
   ========================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  align-items: center;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 40px 30px;
  text-align: center;
  position: relative;
  transition: all var(--transition-normal);
}

@keyframes border-glow {
  0%, 100% {
    box-shadow: 0 15px 45px rgba(157, 78, 221, 0.15), 0 0 15px rgba(157, 78, 221, 0.1);
  }
  50% {
    box-shadow: 0 15px 50px rgba(157, 78, 221, 0.35), 0 0 25px rgba(157, 78, 221, 0.25);
    border-color: var(--secondary);
  }
}

.pricing-card.popular {
  border-color: var(--accent);
  background: linear-gradient(180deg, rgba(157, 78, 221, 0.08) 0%, rgba(13, 19, 38, 1) 100%);
  transform: scale(1.05);
  animation: border-glow 4s infinite ease-in-out;
  border-width: 1.5px;
}

.pricing-card.popular::after {
  content: '推薦商用首選';
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: var(--text-main);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: 50px;
}

.pricing-card:hover {
  transform: translateY(-5px);
  border-color: rgba(255, 255, 255, 0.15);
}

.pricing-card.popular:hover {
  transform: scale(1.05) translateY(-5px);
}

.pricing-header h3 {
  font-family: var(--font-title);
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.pricing-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 30px;
}

.pricing-price {
  font-family: var(--font-title);
  margin-bottom: 30px;
}

.pricing-price .currency {
  font-size: 1.5rem;
  font-weight: 600;
  vertical-align: super;
}

.pricing-price .amount {
  font-size: 3rem;
  font-weight: 800;
  color: var(--text-main);
}

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

.pricing-features {
  text-align: left;
  margin-bottom: 40px;
  border-top: 1px solid var(--border-color);
  padding-top: 30px;
}

.pricing-features li {
  margin-bottom: 12px;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-muted);
}

.pricing-features li.active {
  color: var(--text-main);
}

.pricing-features li::before {
  content: '✓';
  color: var(--secondary);
  font-weight: bold;
}

.pricing-features li.inactive::before {
  content: '✗';
  color: #ef4444;
}

.pricing-features li.inactive {
  opacity: 0.5;
}

.pricing-btn {
  width: 100%;
}

.coming-soon-badge {
  display: block;
  background: rgba(255, 255, 255, 0.05);
  border: 1px dashed rgba(255, 255, 255, 0.2);
  color: var(--text-muted);
  padding: 10px;
  border-radius: 8px;
  font-size: 0.85rem;
  margin-top: 16px;
}

/* ==========================================
   6. FAQ 常見問題
   ========================================== */
.faq-max {
  max-width: 800px;
  margin: 0 auto;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.faq-item:hover {
  border-color: rgba(0, 242, 254, 0.2);
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  padding: 24px;
  text-align: left;
  font-family: var(--font-title);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-icon {
  font-size: 1.2rem;
  color: var(--secondary);
  transition: transform var(--transition-normal);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal) ease-out;
  border-top: 0px solid transparent;
}

.faq-answer-content {
  padding: 0 24px 24px 24px;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* 開啟狀態的 FAQ 項目 */
.faq-item.active {
  border-color: var(--primary);
  box-shadow: 0 4px 20px rgba(0, 114, 255, 0.08);
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-item.active .faq-answer {
  border-top: 1px solid var(--border-color);
}

/* ==========================================
   7. Footer 頁尾
   ========================================== */
.footer {
  background: #03060c;
  border-top: 1px solid var(--border-color);
  padding: 80px 0 30px 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 60px;
  margin-bottom: 60px;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-top: 16px;
  max-width: 320px;
}

.footer-title {
  font-family: var(--font-title);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 24px;
  color: var(--text-main);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: var(--secondary);
  transform: translateX(3px);
}

.footer-cta {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-bottom-links {
  display: flex;
  gap: 24px;
}

.footer-bottom-links a {
  color: var(--text-muted);
  font-size: 0.85rem;
}

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

/* ==========================================
   定位對比區塊 (Comparison Section)
   ========================================== */
.comparison-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: stretch;
  margin-top: 40px;
}

.comparison-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 40px;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-normal);
}

.comparison-box.bad {
  border-color: rgba(239, 68, 68, 0.15);
  background: linear-gradient(180deg, rgba(239, 68, 68, 0.02) 0%, var(--bg-card) 100%);
}

.comparison-box.good {
  border-color: rgba(0, 242, 254, 0.2);
  background: linear-gradient(180deg, rgba(0, 242, 254, 0.03) 0%, var(--bg-card) 100%);
  box-shadow: 0 4px 30px rgba(0, 242, 254, 0.05);
}

.comparison-box h3 {
  font-family: var(--font-title);
  font-size: 1.6rem;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.comparison-box.bad h3 {
  color: #ef4444;
}

.comparison-box.good h3 {
  color: var(--secondary);
}

.comparison-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.comparison-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.comparison-item-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 3px;
  font-size: 0.85rem;
}

.comparison-box.bad .comparison-item-icon {
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
}

.comparison-box.good .comparison-item-icon {
  background: rgba(0, 242, 254, 0.1);
  color: var(--secondary);
}

.comparison-item-content h4 {
  font-family: var(--font-title);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-main);
}

.comparison-item-content p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

@media (max-width: 768px) {
  .comparison-container {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}

/* ==========================================
   語系切換器 (Language Switcher - 三按鈕並排)
   ========================================== */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 2px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  padding: 4px 6px;
  flex-shrink: 0;
}

.lang-option {
  background: none;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-title);
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
  padding: 5px 10px;
  border-radius: 50px;
  transition: all var(--transition-fast);
  letter-spacing: 0.5px;
  line-height: 1;
}

.lang-option:hover {
  color: var(--secondary);
  background: rgba(0, 242, 254, 0.1);
}

.lang-option.active {
  background: rgba(0, 242, 254, 0.18);
  color: var(--secondary);
  box-shadow: 0 0 8px rgba(0, 242, 254, 0.2);
}

.lang-divider {
  color: var(--border-color);
  font-size: 0.65rem;
  user-select: none;
  opacity: 0.6;
}

@media (max-width: 768px) {
  .lang-switcher {
    align-self: center;
  }
  .lang-option {
    padding: 6px 14px;
    font-size: 0.85rem;
  }
}

/* ==========================================
   8. 響應式排版 (Media Queries)
   ========================================== */

@media (max-width: 1024px) {
  .hero-title {
    font-size: 3rem;
  }
  
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 450px;
    margin: 0 auto;
    gap: 40px;
  }
  
  .pricing-card.popular {
    transform: none;
  }
  
  .pricing-card.popular:hover {
    transform: translateY(-5px);
  }
  
  .protocol-box {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 60px 0;
  }
  
  .header {
    padding: 16px 0;
  }
  
  .nav-menu {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background: var(--bg-main);
    flex-direction: column;
    padding: 40px 24px;
    gap: 24px;
    transition: left var(--transition-normal);
    z-index: 999;
    border-top: 1px solid var(--border-color);
  }
  
  .nav-menu.open {
    left: 0;
  }
  
  .nav-toggle {
    display: block;
  }
  
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-desc {
    margin: 0 auto 30px auto;
  }
  
  .hero-btns {
    justify-content: center;
  }
  
  .hero-stats {
    justify-content: center;
  }
  
  .hero-image-wrapper {
    max-width: 320px;
    margin: 0 auto;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

/* ==========================================
   菁英見證 (Testimonials)
   ========================================== */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 30px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition-bounce);
}

.testimonial-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary);
  box-shadow: 0 10px 30px rgba(0, 242, 254, 0.1);
}

.testimonial-content {
  position: relative;
  margin-bottom: 30px;
}

.quote-icon {
  font-size: 2rem;
  color: var(--primary);
  opacity: 0.3;
  margin-bottom: 15px;
}

.testimonial-content p {
  color: var(--text-main);
  font-size: 1.05rem;
  line-height: 1.6;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 15px;
  border-top: 1px solid var(--border-color);
  padding-top: 20px;
}

.author-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: #121212;
  overflow: hidden;
  flex-shrink: 0;
  border: 2px solid rgba(0, 242, 254, 0.3);
}

.avatar-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
}

.author-info h4 {
  font-family: var(--font-title);
  font-size: 1.1rem;
  margin-bottom: 4px;
}

.author-info p {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin: 0;
}

/* ==========================================
   Modals
   ========================================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  width: 90%;
  max-width: 600px;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  transform: translateY(20px) scale(0.95);
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  box-shadow: 0 25px 50px rgba(0,0,0,0.5);
}

.modal-overlay.active .modal-container {
  transform: translateY(0) scale(1);
}

.modal-header {
  padding: 20px 25px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h3 {
  font-family: var(--font-title);
  font-size: 1.3rem;
  margin: 0;
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  transition: color 0.3s;
}

.modal-close:hover {
  color: var(--text-main);
}

.modal-body {
  padding: 25px;
  overflow-y: auto;
  color: var(--text-main);
  line-height: 1.6;
}

/* ==========================================
   Feature Mockup & Floating Widget
   ========================================== */
.feature-mockup-wrapper {
  margin-top: 20px;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 10px 20px rgba(0,0,0,0.3);
  transition: var(--transition-bounce);
}

.feature-mockup-wrapper:hover {
  transform: scale(1.02);
  border-color: rgba(0, 242, 254, 0.3);
  box-shadow: 0 15px 30px rgba(0, 242, 254, 0.15);
}

.feature-mockup-img {
  width: 100%;
  height: auto;
  display: block;
}

.floating-widget {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 60px;
  height: 60px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #121212;
  font-size: 2rem;
  box-shadow: 0 10px 20px rgba(0, 242, 254, 0.3);
  z-index: 900;
  transition: var(--transition-bounce);
  animation: float-widget 3s ease-in-out infinite;
}

.floating-widget:hover {
  transform: scale(1.1);
  box-shadow: 0 15px 30px rgba(0, 242, 254, 0.5);
  animation-play-state: paused;
}

@keyframes float-widget {
  0% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
  100% { transform: translateY(0); }
}

@media (max-width: 768px) {
  .floating-widget {
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    font-size: 1.5rem;
  }
}

/* ==========================================
   訂購流程 (How to Order Steps)
   ========================================== */
.how-to-order {
  background: linear-gradient(180deg, var(--bg-main) 0%, rgba(0, 114, 255, 0.03) 50%, var(--bg-main) 100%);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  position: relative;
  overflow: hidden;
}

.how-to-order::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 114, 255, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  position: relative;
}

/* 步驟間連接線 */
.steps-grid::before {
  content: '';
  position: absolute;
  top: 76px;
  left: calc(16.66% + 15px);
  right: calc(16.66% + 15px);
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--secondary), var(--primary));
  opacity: 0.25;
  z-index: 0;
  pointer-events: none;
}

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 40px 32px 36px;
  text-align: center;
  position: relative;
  z-index: 1;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.step-card:hover {
  transform: translateY(-8px);
  border-color: rgba(0, 242, 254, 0.35);
  box-shadow: 0 20px 50px rgba(0, 114, 255, 0.1);
}

.step-number {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-title);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 2px;
  color: var(--secondary);
  background: var(--bg-card);
  border: 1px solid rgba(0, 242, 254, 0.3);
  padding: 3px 14px;
  border-radius: 50px;
  white-space: nowrap;
}

.step-icon {
  width: 72px;
  height: 72px;
  background: rgba(0, 114, 255, 0.1);
  border: 1px solid rgba(0, 242, 254, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  color: var(--secondary);
  margin-top: 8px;
  transition: all var(--transition-normal);
}

.step-card:hover .step-icon {
  background: rgba(0, 242, 254, 0.15);
  box-shadow: 0 0 20px rgba(0, 242, 254, 0.2);
  transform: scale(1.1);
}

.step-card h3 {
  font-family: var(--font-title);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 0;
}

.step-card p {
  color: var(--text-muted);
  font-size: 0.93rem;
  line-height: 1.65;
  margin: 0;
}

.step-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  background: var(--gradient-primary);
  color: var(--text-dark);
  font-family: var(--font-title);
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: 50px;
  transition: all var(--transition-normal);
  margin-top: 4px;
}

.step-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 242, 254, 0.4);
}

.step-badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-top: 4px;
}

.step-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  background: rgba(0, 242, 254, 0.07);
  border: 1px solid rgba(0, 242, 254, 0.18);
  border-radius: 50px;
  font-size: 0.8rem;
  color: var(--secondary);
  font-weight: 500;
}

@media (max-width: 768px) {
  .steps-grid {
    grid-template-columns: 1fr;
    gap: 50px;
  }
  .steps-grid::before {
    display: none;
  }
}

/* ==========================================
   Scroll Reveal 進場動畫
   ========================================== */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.reveal.reveal-left {
  transform: translateX(-40px);
}

.reveal.reveal-right {
  transform: translateX(40px);
}

.reveal.reveal-scale {
  transform: scale(0.92);
  opacity: 0;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0) translateX(0) scale(1);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }

/* ==========================================
   Common Tools 常用工具
   ========================================== */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 40px;
}

.tool-card {
  display: flex;
  align-items: center;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  text-decoration: none;
  color: var(--text-color);
  transition: var(--transition);
}

.tool-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary-color);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.tool-icon {
  width: 50px;
  height: 50px;
  min-width: 50px;
  background: rgba(43, 110, 245, 0.1);
  color: var(--primary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-right: 15px;
  transition: var(--transition);
}

.tool-card:hover .tool-icon {
  background: var(--primary-color);
  color: var(--text-color);
}

.tool-info h4 {
  font-family: var(--font-title);
  font-size: 1.1rem;
  margin-bottom: 5px;
}

.tool-info p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.4;
}