/* 设计说明：
 * 1. 深色科技风格：使用深色背景、霓虹蓝紫色调、渐变效果
 * 2. 苹果高级审美：简约设计、精致动画、优雅排版
 * 3. 交互功能：可折叠详情、平滑过渡动画
 * 4. 移动端适配：响应式设计，确保在各种设备上良好显示
 */

/* 全局变量 */
:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #121212;
  --bg-card: #1a1a1a;
  --text-primary: #ffffff;
  --text-secondary: #b0b0b0;
  --accent-blue: #0066ff;
  --accent-purple: #6e56cf;
  --accent-gradient: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  --glow-blue: rgba(0, 102, 255, 0.5);
  --glow-purple: rgba(110, 86, 207, 0.5);
  --card-radius: 12px;
  --transition-speed: 0.3s;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace;
}

/* 基础样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

/* 滚动条样式 */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: #333;
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: #444;
}

/* 布局容器 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 导航栏 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: rgba(10, 10, 10, 0.8);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 1000;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  transition: all var(--transition-speed);
}

.navbar-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon {
  font-size: 1.8rem;
}

.nav-links {
  display: flex;
  gap: 30px;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition-speed);
  position: relative;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-gradient);
  transition: width var(--transition-speed);
}

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

/* 移动端菜单按钮 */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 30px;
  height: 21px;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  height: 3px;
  width: 100%;
  background-color: var(--text-primary);
  border-radius: 3px;
  transition: all var(--transition-speed);
}

/* 英雄区域 */
.hero {
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  position: relative;
  overflow: hidden;
  padding-top: 60px;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at center, rgba(110, 86, 207, 0.1) 0%, rgba(10, 10, 10, 0) 70%);
  z-index: -1;
}

.hero-content {
  max-width: 800px;
  padding: 0 20px;
  z-index: 1;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: 20px;
  line-height: 1.2;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: inline-block;
  background: var(--accent-gradient);
  color: white;
  padding: 12px 30px;
  border-radius: 30px;
  text-decoration: none;
  font-weight: 600;
  transition: all var(--transition-speed);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.hero-cta:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
}

/* 特性卡片 */
.features {
  padding: 100px 0;
}

.section-title {
  font-size: 2.5rem;
  text-align: center;
  margin-bottom: 60px;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: var(--accent-gradient);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-top: 50px;
}

.feature-card {
  background-color: var(--bg-card);
  border-radius: var(--card-radius);
  padding: 30px;
  transition: all var(--transition-speed);
  border: 1px solid rgba(255, 255, 255, 0.05);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  border-color: rgba(255, 255, 255, 0.1);
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--accent-gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-speed);
}

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

.feature-icon {
  font-size: 2rem;
  margin-bottom: 20px;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.feature-title {
  font-size: 1.5rem;
  margin-bottom: 15px;
}

.feature-description {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 20px;
}

.feature-details {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-speed);
}

.feature-card.active .feature-details {
  max-height: 1000px;
}

.feature-list {
  list-style-type: none;
  margin-top: 15px;
}

.feature-list li {
  margin-bottom: 10px;
  position: relative;
  padding-left: 25px;
  color: var(--text-secondary);
}

.feature-list li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--accent-blue);
  font-size: 1.2rem;
}

.toggle-details {
  display: inline-block;
  color: var(--accent-blue);
  font-size: 0.9rem;
  cursor: pointer;
  transition: color var(--transition-speed);
}

.toggle-details:hover {
  color: var(--accent-purple);
}

.toggle-icon {
  display: inline-block;
  margin-left: 5px;
  transition: transform var(--transition-speed);
}

.feature-card.active .toggle-icon {
  transform: rotate(180deg);
}

/* 详细功能部分 */
.feature-detail-section {
  padding: 100px 0;
  background-color: var(--bg-secondary);
}

.feature-detail-container {
  display: flex;
  flex-direction: column;
  gap: 80px;
}

.feature-detail {
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.feature-detail-header {
  display: flex;
  align-items: center;
  gap: 15px;
  margin-bottom: 20px;
}

.feature-detail-icon {
  font-size: 2rem;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.feature-detail-title {
  font-size: 2rem;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.feature-detail-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
}

.feature-detail-text {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.feature-detail-subtitle {
  font-size: 1.2rem;
  color: var(--text-primary);
  margin-bottom: 10px;
}

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

.feature-detail-image {
  border-radius: var(--card-radius);
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.05);
  height: 300px;
  background-color: var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-detail-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 价格比较部分 */
.pricing {
  padding: 100px 0;
}

.pricing-table {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-top: 50px;
}

.pricing-card {
  background-color: var(--bg-card);
  border-radius: var(--card-radius);
  padding: 30px;
  transition: all var(--transition-speed);
  border: 1px solid rgba(255, 255, 255, 0.05);
  text-align: center;
}

.pricing-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  border-color: rgba(255, 255, 255, 0.1);
}

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

.pricing-price {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.pricing-description {
  color: var(--text-secondary);
  margin-bottom: 30px;
}

.pricing-features {
  list-style-type: none;
  margin-bottom: 30px;
  text-align: left;
}

.pricing-features li {
  margin-bottom: 10px;
  position: relative;
  padding-left: 25px;
  color: var(--text-secondary);
}

.pricing-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent-blue);
}

.pricing-cta {
  display: inline-block;
  background: var(--accent-gradient);
  color: white;
  padding: 10px 25px;
  border-radius: 30px;
  text-decoration: none;
  font-weight: 600;
  transition: all var(--transition-speed);
}

.pricing-cta:hover {
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

/* 页脚 */
.footer {
  background-color: var(--bg-secondary);
  padding: 50px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-container {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 30px;
}

.footer-logo {
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 15px;
}

.footer-description {
  color: var(--text-secondary);
  max-width: 300px;
  margin-bottom: 20px;
}

.footer-links-container {
  display: flex;
  gap: 50px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links-title {
  font-size: 1.1rem;
  margin-bottom: 15px;
  color: var(--text-primary);
}

.footer-link {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-speed);
}

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

.footer-bottom {
  margin-top: 50px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* 动画效果 */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-in {
  animation: fadeIn 0.6s ease-out forwards;
}

.delay-1 {
  animation-delay: 0.1s;
}

.delay-2 {
  animation-delay: 0.2s;
}

.delay-3 {
  animation-delay: 0.3s;
}

.delay-4 {
  animation-delay: 0.4s;
}

.delay-5 {
  animation-delay: 0.5s;
}

/* 响应式设计 */
@media (max-width: 992px) {
  .hero-title {
    font-size: 2.8rem;
  }
  
  .feature-detail-content {
    grid-template-columns: 1fr;
  }
  
  .feature-detail-image {
    order: -1;
  }
}

@media (max-width: 768px) {
  .navbar-container {
    padding: 15px 20px;
  }
  
  .nav-links {
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    background-color: var(--bg-secondary);
    flex-direction: column;
    align-items: center;
    padding: 20px 0;
    gap: 20px;
    transform: translateY(-100%);
    opacity: 0;
    transition: all var(--transition-speed);
    z-index: 999;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }
  
  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
  }
  
  .menu-toggle {
    display: flex;
  }
  
  .menu-toggle.active span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
  }
  
  .menu-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  
  .menu-toggle.active span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
  }
  
  .hero-title {
    font-size: 2.2rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .footer-container {
    flex-direction: column;
  }
  
  .footer-links-container {
    flex-direction: column;
    gap: 30px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.8rem;
  }
  
  .hero-cta {
    padding: 10px 20px;
    font-size: 0.9rem;
  }
  
  .feature-card {
    padding: 20px;
  }
  
  .feature-title {
    font-size: 1.3rem;
  }
}