/* ============================================
   AuraSync AI - 全局樣式表
   品牌色系：深空靛藍 #0F172A | 電光霓虹翠 #10B981 | 星雲漸層 #6366F1 → #A855F7
   設計語彙：未來極簡風、毛玻璃質感、動態漸層
   ============================================ */

:root {
  --color-deep-indigo: #0F172A;
  --color-neon-teal: #10B981;
  --color-nebula-start: #6366F1;
  --color-nebula-end: #A855F7;
  --color-text-primary: #FFFFFF;
  --color-text-secondary: #D1D5DB;
  --color-text-muted: #9CA3AF;
  --color-border-light: rgba(255, 255, 255, 0.1);
  --color-border-medium: rgba(255, 255, 255, 0.2);
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   基礎樣式
   ============================================ */

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

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--color-deep-indigo);
  color: var(--color-text-primary);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}

/* ============================================
   毛玻璃卡片效果 (Glassmorphism)
   ============================================ */

.glass-card {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  border: 1px solid var(--color-border-light);
  border-radius: 12px;
  padding: 24px;
  transition: var(--transition-smooth);
}

.glass-card:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--color-border-medium);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(16, 185, 129, 0.15);
}

.glass-card-sm {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  border: 1px solid var(--color-border-light);
  border-radius: 8px;
  padding: 16px;
  transition: var(--transition-smooth);
}

/* ============================================
   導航欄
   ============================================ */

.navbar {
  background: rgba(15, 23, 42, 0.8) !important;
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border-light);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 1030;
}

.navbar-brand {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-nebula-start), var(--color-nebula-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
}

.nav-link {
  color: var(--color-text-secondary) !important;
  font-weight: 500;
  transition: var(--transition-smooth);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-neon-teal) !important;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-neon-teal);
  transition: var(--transition-smooth);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

/* ============================================
   按鈕樣式
   ============================================ */

.btn-primary-glow {
  background: linear-gradient(135deg, var(--color-neon-teal), #059669);
  border: none;
  color: white;
  font-weight: 600;
  padding: 12px 32px;
  border-radius: 8px;
  transition: var(--transition-smooth);
  box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
  text-decoration: none;
  display: inline-block;
}

.btn-primary-glow:hover {
  background: linear-gradient(135deg, #059669, var(--color-neon-teal));
  box-shadow: 0 8px 25px rgba(16, 185, 129, 0.5);
  transform: translateY(-2px);
  color: white;
}

.btn-secondary-outline {
  background: transparent;
  border: 2px solid var(--color-neon-teal);
  color: var(--color-neon-teal);
  font-weight: 600;
  padding: 10px 28px;
  border-radius: 8px;
  transition: var(--transition-smooth);
  text-decoration: none;
  display: inline-block;
}

.btn-secondary-outline:hover {
  background: var(--color-neon-teal);
  color: var(--color-deep-indigo);
}

/* ============================================
   Hero Section
   ============================================ */

.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 80px 20px;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(168, 85, 247, 0.1));
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
}

.hero-title {
  font-size: clamp(2.5rem, 8vw, 4rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--color-text-primary), var(--color-neon-teal));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -1px;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  margin-bottom: 40px;
  line-height: 1.8;
}

.hero-cta-group {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================
   Section 標題
   ============================================ */

.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  margin-bottom: 50px;
  text-align: center;
  position: relative;
  padding-bottom: 20px;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-nebula-start), var(--color-nebula-end));
  border-radius: 2px;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  text-align: center;
  margin-bottom: 40px;
}

/* ============================================
   網格佈局
   ============================================ */

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-bottom: 60px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 30px;
  margin-bottom: 60px;
}

/* ============================================
   功能卡片
   ============================================ */

.feature-card {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  border: 1px solid var(--color-border-light);
  border-radius: 12px;
  padding: 32px;
  text-align: center;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-nebula-start), var(--color-nebula-end));
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition-smooth);
}

.feature-card:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--color-neon-teal);
  transform: translateY(-8px);
  box-shadow: 0 12px 40px rgba(16, 185, 129, 0.2);
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--color-nebula-start), var(--color-nebula-end));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 28px;
}

.feature-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.feature-description {
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ============================================
   頁腳
   ============================================ */

footer {
  background: rgba(0, 0, 0, 0.3);
  border-top: 1px solid var(--color-border-light);
  padding: 60px 20px 20px;
  margin-top: 100px;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 40px;
  margin-bottom: 40px;
}

.footer-section h5 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--color-neon-teal);
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: 12px;
}

.footer-section a {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: var(--transition-smooth);
}

.footer-section a:hover {
  color: var(--color-neon-teal);
}

.footer-bottom {
  border-top: 1px solid var(--color-border-light);
  padding-top: 20px;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* ============================================
   表單樣式
   ============================================ */

.form-control,
.form-select {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--color-border-light);
  color: var(--color-text-primary);
  border-radius: 8px;
  padding: 12px 16px;
  transition: var(--transition-smooth);
}

.form-control::placeholder {
  color: var(--color-text-muted);
}

.form-control:focus,
.form-select:focus {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--color-neon-teal);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
  color: var(--color-text-primary);
}

.form-label {
  color: var(--color-text-secondary);
  font-weight: 600;
  margin-bottom: 8px;
}

/* ============================================
   響應式設計
   ============================================ */

@media (max-width: 768px) {
  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .hero-cta-group {
    flex-direction: column;
    align-items: center;
  }

  .section-title {
    font-size: 1.8rem;
  }

  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   動畫效果
   ============================================ */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.animate-fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

.animate-slide-in-left {
  animation: slideInLeft 0.6s ease-out;
}

.animate-slide-in-right {
  animation: slideInRight 0.6s ease-out;
}

/* ============================================
   工具類
   ============================================ */

.text-gradient {
  background: linear-gradient(135deg, var(--color-nebula-start), var(--color-nebula-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-neon {
  color: var(--color-neon-teal);
}

.text-secondary {
  color: var(--color-text-secondary);
}

.text-muted {
  color: var(--color-text-muted);
}

.border-neon {
  border-color: var(--color-neon-teal) !important;
}

.bg-gradient-nebula {
  background: linear-gradient(135deg, var(--color-nebula-start), var(--color-nebula-end));
}

.shadow-glow {
  box-shadow: 0 0 20px rgba(16, 185, 129, 0.3);
}

.section-padding {
  padding: 80px 20px;
}

.container-custom {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ============================================
   計數器動畫
   ============================================ */

.counter-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-neon-teal);
  transition: all 0.3s ease;
}

/* ============================================
   滑桿樣式
   ============================================ */

.range-slider {
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: linear-gradient(to right, var(--color-nebula-start), var(--color-nebula-end));
  outline: none;
  -webkit-appearance: none;
}

.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-neon-teal);
  cursor: pointer;
  box-shadow: 0 0 10px rgba(16, 185, 129, 0.5);
  transition: var(--transition-smooth);
}

.range-slider::-webkit-slider-thumb:hover {
  width: 24px;
  height: 24px;
  box-shadow: 0 0 20px rgba(16, 185, 129, 0.8);
}

.range-slider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-neon-teal);
  cursor: pointer;
  border: none;
  box-shadow: 0 0 10px rgba(16, 185, 129, 0.5);
  transition: var(--transition-smooth);
}

.range-slider::-moz-range-thumb:hover {
  width: 24px;
  height: 24px;
  box-shadow: 0 0 20px rgba(16, 185, 129, 0.8);
}

/* ============================================
   切換開關樣式
   ============================================ */

.toggle-switch {
  position: relative;
  display: inline-block;
  width: 60px;
  height: 34px;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(255, 255, 255, 0.2);
  transition: var(--transition-smooth);
  border-radius: 34px;
  border: 1px solid var(--color-border-light);
}

.toggle-slider:before {
  position: absolute;
  content: "";
  height: 26px;
  width: 26px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  transition: var(--transition-smooth);
  border-radius: 50%;
}

input:checked + .toggle-slider {
  background: linear-gradient(135deg, var(--color-nebula-start), var(--color-nebula-end));
  border-color: var(--color-neon-teal);
}

input:checked + .toggle-slider:before {
  transform: translateX(26px);
}

/* ============================================
   表格樣式
   ============================================ */

.table {
  color: var(--color-text-primary);
}

.table thead th {
  border-color: var(--color-border-light);
  color: var(--color-neon-teal);
  font-weight: 700;
  background: rgba(16, 185, 129, 0.05);
}

.table tbody td {
  border-color: var(--color-border-light);
  vertical-align: middle;
}

.table tbody tr {
  transition: var(--transition-smooth);
}

.table tbody tr:hover {
  background: rgba(16, 185, 129, 0.1);
}

.table-highlight {
  background: rgba(16, 185, 129, 0.15) !important;
}

/* ============================================
   徽章與標籤
   ============================================ */

.badge {
  background: linear-gradient(135deg, var(--color-nebula-start), var(--color-nebula-end));
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
}

.badge-outline {
  background: transparent;
  border: 1px solid var(--color-neon-teal);
  color: var(--color-neon-teal);
}

/* ============================================
   卡片樣式 (定價卡片)
   ============================================ */

.pricing-card {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  border: 1px solid var(--color-border-light);
  border-radius: 12px;
  padding: 40px 30px;
  text-align: center;
  transition: var(--transition-smooth);
  position: relative;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.pricing-card.featured {
  border-color: var(--color-neon-teal);
  background: rgba(16, 185, 129, 0.08);
  transform: scale(1.05);
}

.pricing-card:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--color-neon-teal);
  transform: translateY(-8px);
  box-shadow: 0 12px 40px rgba(16, 185, 129, 0.2);
}

.pricing-card.featured:hover {
  transform: scale(1.05) translateY(-8px);
}

.pricing-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 15px;
}

.pricing-price {
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-neon-teal);
  margin: 20px 0;
}

.pricing-period {
  color: var(--color-text-secondary);
  font-size: 1rem;
  margin-bottom: 30px;
}

.pricing-features {
  list-style: none;
  text-align: left;
  margin: 30px 0;
  flex-grow: 1;
}

.pricing-features li {
  padding: 12px 0;
  color: var(--color-text-secondary);
  border-bottom: 1px solid var(--color-border-light);
  display: flex;
  align-items: center;
}

.pricing-features li:last-child {
  border-bottom: none;
}

.pricing-features li:before {
  content: "✓";
  color: var(--color-neon-teal);
  font-weight: 700;
  margin-right: 12px;
  font-size: 1.2rem;
}

.pricing-cta {
  margin-top: 30px;
}

/* ============================================
   新聞卡片
   ============================================ */

.news-card {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  border: 1px solid var(--color-border-light);
  border-radius: 12px;
  overflow: hidden;
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.news-card:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--color-neon-teal);
  transform: translateY(-8px);
  box-shadow: 0 12px 40px rgba(16, 185, 129, 0.2);
}

.news-image {
  width: 100%;
  height: 200px;
  background: linear-gradient(135deg, var(--color-nebula-start), var(--color-nebula-end));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: rgba(255, 255, 255, 0.3);
}

.news-content {
  padding: 24px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.news-category {
  display: inline-block;
  background: linear-gradient(135deg, var(--color-nebula-start), var(--color-nebula-end));
  color: white;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
  margin-bottom: 12px;
  width: fit-content;
}

.news-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.4;
}

.news-excerpt {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 16px;
  flex-grow: 1;
}

.news-meta {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.news-link {
  color: var(--color-neon-teal);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition-smooth);
}

.news-link:hover {
  color: #059669;
}