/* 全局樣式 */
:root {
  --primary-color: #003366;
  --secondary-color: #004d99;
  --accent-color: #007bff;
  --text-color: #333;
  --light-bg: #f8f9fa;
  --white: #ffffff;
  --shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
}

body {
  font-family: 'Microsoft JhengHei', Arial, sans-serif;
  color: var(--text-color);
  line-height: 1.6;
  overflow-x: hidden;
  background-color: var(--light-bg);
}

/* 導航欄樣式 */
.navbar {
  background: var(--primary-color);
  padding: 1rem 0;
  transition: var(--transition);
  box-shadow: var(--shadow);
}

.navbar-brand {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--white) !important;
}

.nav-link {
  color: var(--white) !important;
  font-weight: 500;
  padding: 0.5rem 1rem !important;
  transition: var(--transition);
}

.nav-link:hover {
  color: rgba(255,255,255,0.8) !important;
}

/* 區段樣式 */
.section-padding {
  padding: 60px 0;
}

.section-title {
  text-align: center;
  margin-bottom: 40px;
  color: var(--primary-color);
  font-weight: bold;
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 50px;
  height: 3px;
  background: var(--accent-color);
  margin: 15px auto;
}

/* 專題簡介樣式 */
.intro-content {
  padding: 20px;
}

.feature-list {
  margin-top: 30px;
}

/* 核心特色樣式 */
.feature-item {
  padding: 20px;
  background: var(--white);
  border-radius: 10px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  height: 100%;
}

.feature-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 5px 20px rgba(0,0,0,0.15);
}

.feature-item i {
  color: var(--primary-color);
  margin-bottom: 15px;
}

.feature-item h5 {
  color: var(--primary-color);
  margin-bottom: 10px;
  font-weight: bold;
}

.feature-item p {
  color: var(--text-color);
  margin-bottom: 0;
}

/* 技術卡片樣式 */
.tech-card, .demo-card, .team-card {
  background: var(--white);
  padding: 20px;
  border-radius: 10px;
  box-shadow: var(--shadow);
  margin-bottom: 20px;
  transition: var(--transition);
}

.tech-card:hover, .demo-card:hover, .team-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 5px 20px rgba(0,0,0,0.15);
}

.tech-icon {
  font-size: 40px;
  color: var(--accent-color);
  margin-bottom: 20px;
}

/* 系統流程樣式 */
.system-flow {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  margin: 40px 0;
}

.flow-step {
  text-align: center;
  flex: 1;
  min-width: 200px;
  padding: 20px;
}

.step-number {
  width: 40px;
  height: 40px;
  background: var(--primary-color);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 15px;
  font-weight: bold;
}

.flow-arrow {
  color: var(--primary-color);
  font-size: 24px;
  padding: 0 15px;
}

/* 系統展示樣式 */
.demo-image {
  margin-top: 20px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

/* 結論與改進樣式 */
.conclusion-card,
.improvement-card {
  background: var(--white);
  padding: 30px;
  border-radius: 10px;
  box-shadow: var(--shadow);
  height: 100%;
}

.achievement-list,
.improvement-list {
  list-style: none;
  padding: 0;
}

.achievement-list li,
.improvement-list li {
  margin-bottom: 15px;
  padding-left: 25px;
  position: relative;
}

.achievement-list li::before,
.improvement-list li::before {
  content: '✓';
  color: var(--accent-color);
  position: absolute;
  left: 0;
}

/* 團隊成員樣式 */
.team-card {
  text-align: center;
}

.team-card h3 {
  margin: 15px 0 5px;
}

.team-card .role {
  color: var(--accent-color);
  font-weight: bold;
  margin-bottom: 10px;
}

/* 頁尾樣式 */
.footer {
  background: var(--primary-color);
  color: var(--white);
  padding: 40px 0;
  margin-top: 40px;
}

.footer h3 {
  margin-bottom: 20px;
}

/* 響應式設計 */
@media (max-width: 768px) {
  .section-padding {
    padding: 40px 0;
  }
  
  .system-flow {
    flex-direction: column;
  }
  
  .flow-arrow {
    transform: rotate(90deg);
    margin: 10px 0;
  }
  
  .feature-grid {
    grid-template-columns: 1fr;
  }
}

/* 動畫效果 */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 背景顏色交替 */
.bg-light {
  background-color: var(--light-bg) !important;
}

/* 按鈕樣式 */
.btn-outline-primary {
  color: var(--accent-color);
  border-color: var(--accent-color);
  transition: var(--transition);
}

.btn-outline-primary:hover {
  background-color: var(--accent-color);
  color: var(--white);
}

/* 頁首樣式 */
header {
  background-color: var(--primary-color);
  color: var(--white);
  padding: 3rem 0;
  text-align: center;
  margin-bottom: 2rem;
}

header h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  font-weight: bold;
}

header .lead {
  font-size: 1.2rem;
  opacity: 0.9;
}

/* 容器樣式 */
.container-fluid {
  padding: 2rem 0;
}

.section {
  background-color: var(--white);
  padding: 2rem;
  border-radius: 10px;
  box-shadow: var(--shadow);
  margin-bottom: 2rem;
}

.section h2 {
  color: var(--primary-color);
  margin-bottom: 2rem;
  text-align: center;
  font-weight: bold;
}

.tech-detail-card {
  background-color: var(--white);
  padding: 1.5rem;
  border-radius: 8px;
  box-shadow: var(--shadow);
  margin-bottom: 1.5rem;
  transition: var(--transition);
}

.tech-detail-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 5px 20px rgba(0,0,0,0.15);
}

.tech-detail-card h3 {
  color: var(--primary-color);
  font-size: 1.3rem;
  margin-bottom: 1rem;
  font-weight: bold;
}

.tech-detail-card p {
  color: var(--text-color);
  margin-bottom: 1rem;
}

.tech-detail-card ul {
  list-style-type: none;
  padding-left: 0;
}

.tech-detail-card ul li {
  padding: 0.5rem 0;
  padding-left: 1.5rem;
  position: relative;
}

.tech-detail-card ul li::before {
  content: "•";
  color: var(--accent-color);
  position: absolute;
  left: 0;
  font-weight: bold;
}

footer {
  background-color: var(--primary-color);
  color: var(--white);
  text-align: center;
  padding: 1.5rem 0;
  margin-top: 3rem;
}

.btn-primary {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  padding: 0.5rem 2rem;
  font-weight: 500;
  transition: var(--transition);
}

.btn-primary:hover {
  background-color: var(--secondary-color);
  border-color: var(--secondary-color);
  transform: translateY(-2px);
}

/* 卡片樣式 */
.card {
  border: none;
  border-radius: 10px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  margin-bottom: 1.5rem;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
}

.side-card {
  background: linear-gradient(135deg, #ffffff, #f8f9fa);
}

/* 功能區塊樣式 */
.feature-box {
  padding: 1.5rem;
  background: white;
  border-radius: 10px;
  margin-bottom: 1.5rem;
  transition: all 0.3s ease;
}

.feature-box:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

/* 系統圖片樣式 */
.system-image {
  max-width: 100%;
  border-radius: 10px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease;
}

.system-image:hover {
  transform: scale(1.02);
}

/* 成就卡片樣式 */
.achievement-card {
  background: linear-gradient(135deg, #ffffff, #f8f9fa);
  border-left: 4px solid #1a237e;
}

/* 動畫效果 */
@keyframes float {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
  100% { transform: translateY(0px); }
}

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 響應式設計 */
@media (max-width: 576px) {
  .feature-box {
    padding: 10px;
  }
  
  .feature-icon {
    font-size: 1.5rem;
  }
  
  h4 {
    font-size: 1.1rem;
  }
  
  p {
    font-size: 0.9rem;
  }
}

/* 動畫關鍵幀 */
@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 動畫效果 */
@keyframes float {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
  100% { transform: translateY(0px); }
}

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 痛點分析卡片樣式 */
.pain-point-card {
  background: white;
  border-radius: 15px;
  padding: 2rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
  height: 100%;
  position: relative;
  overflow: hidden;
}

.pain-point-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(to bottom, #1a237e, #0d47a1);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.pain-point-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
}

.pain-point-card:hover::before {
  opacity: 1;
}

.pain-point-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  display: inline-block;
  transition: transform 0.3s ease;
}

.pain-point-card:hover .pain-point-icon {
  transform: scale(1.1);
}

.pain-point-card h4 {
  color: #1a237e;
  margin-bottom: 1rem;
  font-weight: 600;
}

.pain-point-card p {
  color: #666;
  margin-bottom: 0;
  line-height: 1.6;
}

/* 動態標題樣式 */
.hero-title {
  padding: 40px 0;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  border-radius: 15px;
  margin-bottom: 40px;
  box-shadow: var(--shadow);
}

.animated-title {
  color: var(--white);
  font-size: 3rem;
  font-weight: bold;
  margin: 0;
  padding: 20px;
  position: relative;
  animation: titleFloat 3s ease-in-out infinite;
}

.hero-title .lead {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.5rem;
  margin-top: 15px;
}

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

/* 響應式調整 */
@media (max-width: 768px) {
  .animated-title {
    font-size: 2rem;
  }
  
  .hero-title .lead {
    font-size: 1.2rem;
  }
}

.demo-card {
  background: var(--white);
  padding: 20px;
  border-radius: 10px;
  box-shadow: var(--shadow);
  margin-bottom: 20px;
  transition: var(--transition);
  height: 400px;
  display: flex;
  flex-direction: column;
}

.demo-card h3 {
  margin-bottom: 20px;
}

.video-container {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  overflow: hidden;
}

.video-container video {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
}

.use-cases {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.use-case {
  background: #f8f9fa;
  padding: 15px;
  border-radius: 8px;
  margin-bottom: 15px;
}

.use-case:last-child {
  margin-bottom: 0;
}

.use-case h4 {
  margin-bottom: 10px;
  color: var(--primary-color);
}

.use-case p {
  margin-bottom: 0;
  color: #666;
}

/* 標籤頁樣式 */
.nav-tabs {
  border-bottom: 2px solid var(--primary-color);
  margin-bottom: 30px;
}

.nav-tabs .nav-link {
  color: var(--text-color);
  background-color: transparent;
  border: none;
  border-bottom: 3px solid transparent;
  padding: 12px 30px;
  font-weight: 500;
  transition: var(--transition);
  margin: 0 5px;
}

.nav-tabs .nav-link:hover {
  border-bottom-color: var(--accent-color);
  color: var(--accent-color);
  background-color: rgba(0, 123, 255, 0.05);
}

.nav-tabs .nav-link.active {
  color: var(--primary-color);
  background-color: transparent;
  border-bottom-color: var(--primary-color);
  font-weight: bold;
}

.nav-tabs .nav-link i {
  font-size: 1.1rem;
}

.tab-content {
  animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.tab-pane {
  padding: 20px 0;
}

/* 版本區塊樣式 */
.version-section {
  margin-bottom: 50px;
}

.version-section:last-child {
  margin-bottom: 0;
}

.version-title {
  color: var(--primary-color);
  font-size: 2rem;
  font-weight: bold;
  padding: 20px;
  background: linear-gradient(135deg, rgba(0, 51, 102, 0.1), rgba(0, 77, 153, 0.1));
  border-radius: 10px;
  margin-bottom: 30px;
  border-left: 5px solid var(--primary-color);
}

.version-title i {
  color: var(--accent-color);
}

.demo-card h4 {
  color: var(--primary-color);
  font-weight: bold;
  margin-bottom: 20px;
  font-size: 1.3rem;
}

.demo-card h5 {
  color: var(--primary-color);
  font-weight: 600;
  margin-bottom: 10px;
  font-size: 1.1rem;
}

/* 系統設計圖片樣式 */
.system-image-container {
  margin-top: 40px;
  padding: 20px 0;
}

.system-design-image {
  max-width: 100%;
  height: auto;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  transition: var(--transition);
}

.system-design-image:hover {
  transform: scale(1.02);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}