/* 
 * 龙猫云 (LongMaoYun) 极速网络加速器/代理服务 - 视觉设计系统
 * 纯原生 CSS3，支持极致秒开，暗黑科技风 (Dark Mode Glassmorphism)
 */

:root {
  --bg-dark: #090d16;
  --bg-card: rgba(18, 25, 41, 0.7);
  --bg-card-hover: rgba(28, 38, 62, 0.85);
  --primary: #00f2fe;
  --primary-glow: rgba(0, 242, 254, 0.35);
  --secondary: #4facfe;
  --accent-purple: #7f00ff;
  --accent-pink: #e100ff;
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-highlight: rgba(0, 242, 254, 0.4);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans', sans-serif;
  --transition-fast: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --max-width: 1200px;
}

/* 基础重置 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-family: var(--font-family);
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body {
  overflow-x: hidden;
  position: relative;
  background: radial-gradient(circle at 50% 0%, rgba(127, 0, 255, 0.15) 0%, transparent 60%),
              radial-gradient(circle at 80% 40%, rgba(0, 242, 254, 0.1) 0%, transparent 50%),
              var(--bg-dark);
  min-height: 100vh;
}

/* 全局容器 */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* 顶部导航栏 */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(9, 13, 22, 0.8);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition-fast);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.logo-group {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.logo-img {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  object-fit: cover;
  box-shadow: 0 0 15px var(--primary-glow);
}

.logo-text {
  font-size: 1.4rem;
  font-weight: 800;
  background: linear-gradient(135deg, #ffffff 0%, var(--primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.5px;
}

.logo-tag {
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 12px;
  background: rgba(0, 242, 254, 0.15);
  color: var(--primary);
  border: 1px solid rgba(0, 242, 254, 0.3);
  font-weight: 600;
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition-fast);
}

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

.nav-cta {
  display: flex;
  gap: 12px;
  align-items: center;
}

/* 通用 CTA 按钮样式 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: 30px;
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent-purple) 100%);
  color: #ffffff;
  box-shadow: 0 4px 20px var(--primary-glow);
  border: none;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 242, 254, 0.5);
  filter: brightness(1.1);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
}

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

/* 主视觉 Hero 区域 (左右分布 + 动漫科技动态图卡) */
.hero {
  padding: 80px 0 60px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
  margin-bottom: 60px;
}

.hero-content {
  text-align: left;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: rgba(127, 0, 255, 0.15);
  border: 1px solid rgba(0, 242, 254, 0.35);
  border-radius: 30px;
  font-size: 0.88rem;
  color: var(--primary);
  margin-bottom: 24px;
  box-shadow: 0 0 15px rgba(0, 242, 254, 0.15);
}

.hero-title {
  font-size: 3.4rem;
  font-weight: 900;
  line-height: 1.18;
  margin-bottom: 24px;
  letter-spacing: -1px;
}

.hero-title .gradient-text {
  background: linear-gradient(135deg, #00f2fe 0%, #a855f7 50%, #e100ff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero-subtitle {
  font-size: 1.18rem;
  color: var(--text-muted);
  max-width: 640px;
  margin-bottom: 36px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  justify-content: flex-start;
  flex-wrap: wrap;
  gap: 16px;
}

/* 动态图卡视觉区 (Dynamic Anime Card) */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.anime-card-frame {
  position: relative;
  width: 100%;
  max-width: 440px;
  border-radius: var(--radius-lg);
  padding: 12px;
  background: linear-gradient(135deg, rgba(0, 242, 254, 0.25) 0%, rgba(127, 0, 255, 0.25) 100%);
  box-shadow: 0 0 40px rgba(0, 242, 254, 0.25), 0 20px 50px rgba(0, 0, 0, 0.5);
  animation: floatCard 4s ease-in-out infinite;
  overflow: hidden;
}

.anime-img-wrap {
  position: relative;
  width: 100%;
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 1 / 1;
}

.anime-hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: var(--transition-smooth);
}

.anime-card-frame:hover .anime-hero-img {
  transform: scale(1.04);
}

/* 动态扫描光束效果 */
.anime-img-wrap::after {
  content: "";
  position: absolute;
  top: -100%;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, transparent 0%, rgba(0, 242, 254, 0.3) 50%, transparent 100%);
  animation: scanbeam 3.5s linear infinite;
  pointer-events: none;
}

/* 动态悬浮小标签图卡 */
.live-status-card {
  position: absolute;
  background: rgba(18, 25, 41, 0.9);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(0, 242, 254, 0.4);
  border-radius: var(--radius-md);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.5);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-main);
  z-index: 10;
}

.card-top-left {
  top: -15px;
  left: -20px;
  animation: floatCard 4s ease-in-out infinite 0.5s;
}

.card-bottom-right {
  bottom: -15px;
  right: -20px;
  animation: floatCard 4s ease-in-out infinite 1.5s;
}

.ping-indicator {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 10px #10b981;
  animation: pulseGreen 1.5s infinite;
}

.status-badge-text {
  display: flex;
  flex-direction: column;
}

.status-badge-text span {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 400;
}

/* Keyframes 动画库 */
@keyframes floatCard {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-12px) rotate(1deg); }
}

@keyframes scanbeam {
  0% { top: -100%; }
  100% { top: 200%; }
}

@keyframes pulseGreen {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(1.3); }
}

/* 核心技术统计数据 */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 100%;
  margin: 0 auto;
  padding: 30px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
}

.stat-item h4 {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 4px;
}

.stat-item p {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* 通用 Section 样式 */
.section {
  padding: 90px 0;
}

.section-title-wrap {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 60px;
}

.section-tag {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--primary);
  font-weight: 700;
  margin-bottom: 12px;
  display: block;
}

.section-title {
  font-size: 2.4rem;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
}

/* 核心优势卡片网格 */
.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(--radius-lg);
  padding: 40px 30px;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-highlight);
  background: var(--bg-card-hover);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4), 0 0 30px rgba(0, 242, 254, 0.1);
}

.feature-icon-wrap {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(0, 242, 254, 0.1) 0%, rgba(127, 0, 255, 0.1) 100%);
  border: 1px solid rgba(0, 242, 254, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.feature-icon-wrap svg {
  width: 32px;
  height: 32px;
  fill: none;
  stroke: var(--primary);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.feature-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 14px;
}

.feature-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* 流媒体与 AI 支持图卡 */
.ecosystem-section {
  background: linear-gradient(180deg, transparent 0%, rgba(18, 25, 41, 0.5) 50%, transparent 100%);
}

.ecosystem-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.eco-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: var(--transition-fast);
}

.eco-card:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
  background: var(--bg-card-hover);
}

.eco-badge {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.2rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  flex-shrink: 0;
}

.eco-info h4 {
  font-size: 1.05rem;
  font-weight: 700;
}

.eco-info p {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* 价格对比表 */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition-smooth);
}

.pricing-card.popular {
  border-color: var(--primary);
  background: linear-gradient(180deg, rgba(0, 242, 254, 0.08) 0%, var(--bg-card) 100%);
  transform: scale(1.04);
  box-shadow: 0 0 35px rgba(0, 242, 254, 0.2);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, var(--primary), var(--accent-purple));
  color: #fff;
  padding: 4px 16px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 1px;
}

.pricing-header h3 {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.pricing-header p {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.pricing-price {
  font-size: 2.8rem;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 24px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

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

.pricing-features {
  list-style: none;
  margin-bottom: 32px;
  flex-grow: 1;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.pricing-features li svg {
  width: 18px;
  height: 18px;
  stroke: var(--primary);
  flex-shrink: 0;
}

/* 用户评价 */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 30px;
}

.review-stars {
  color: #ffb800;
  margin-bottom: 14px;
  font-size: 1rem;
}

.review-text {
  font-size: 0.95rem;
  color: var(--text-main);
  line-height: 1.6;
  margin-bottom: 20px;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 12px;
}

.avatar-placeholder {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent-purple));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
}

.user-meta h5 {
  font-size: 0.95rem;
  font-weight: 700;
}

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

/* FAQ 常见问题 */
.faq-wrap {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

details {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  transition: var(--transition-fast);
}

details[open] {
  border-color: var(--primary);
  background: var(--bg-card-hover);
}

summary {
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

summary::-webkit-details-marker {
  display: none;
}

summary::after {
  content: "+";
  font-size: 1.5rem;
  color: var(--primary);
  transition: transform var(--transition-fast);
}

details[open] summary::after {
  content: "−";
}

.faq-content {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* 底栏 Footer - 严格按照要求只保留 4 个页面链接 */
.footer {
  border-top: 1px solid var(--border-color);
  background: rgba(6, 9, 15, 0.95);
  padding: 60px 0 40px;
  margin-top: 60px;
}

.footer-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 32px;
}

.footer-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 40px;
  list-style: none;
  flex-wrap: wrap;
}

.footer-nav a {
  color: var(--text-main);
  text-decoration: none;
  font-size: 1.05rem;
  font-weight: 600;
  transition: var(--transition-fast);
  padding: 8px 16px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
}

.footer-nav a:hover {
  color: var(--primary);
  border-color: var(--primary);
  background: rgba(0, 242, 254, 0.08);
  transform: translateY(-2px);
}

.footer-copy {
  color: var(--text-dim);
  font-size: 0.85rem;
  text-align: center;
}

/* 子页面独立样式模板 */
.page-hero {
  padding: 80px 0 40px;
  text-align: center;
}

.page-title {
  font-size: 2.8rem;
  font-weight: 900;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #ffffff 0%, var(--primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-body {
  max-width: 900px;
  margin: 0 auto 80px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 50px 40px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.page-body h2 {
  font-size: 1.5rem;
  color: var(--primary);
  margin: 32px 0 16px;
  border-bottom: 1px solid rgba(0, 242, 254, 0.2);
  padding-bottom: 8px;
}

.page-body h2:first-child {
  margin-top: 0;
}

.page-body p {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 16px;
}

.page-body ul {
  color: var(--text-muted);
  padding-left: 24px;
  margin-bottom: 20px;
}

.page-body li {
  margin-bottom: 10px;
  line-height: 1.6;
}

/* 响应式适配与移动端触摸优化 (Mobile Responsive Design) */

/* 中等屏幕 iPad / 平板电脑 (max-width: 992px) */
@media (max-width: 992px) {
  .hero-title { 
    font-size: 2.6rem; 
  }
  .features-grid, .pricing-grid, .reviews-grid { 
    grid-template-columns: 1fr; 
  }
  .ecosystem-grid { 
    grid-template-columns: repeat(2, 1fr); 
  }
  .pricing-card.popular { 
    transform: none; 
  }
  .hero-stats { 
    grid-template-columns: repeat(2, 1fr); 
  }
  .nav-links { 
    display: none; 
  }
}

/* 手机端与小屏移动设备 (max-width: 768px) */
@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }
  
  .header-container {
    height: 70px;
  }

  .logo-text {
    font-size: 1.25rem;
  }

  .logo-tag {
    font-size: 0.7rem;
    padding: 2px 6px;
  }

  /* 英雄区手机端单栏优化 */
  .hero {
    padding: 40px 0 30px;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 32px;
    margin-bottom: 40px;
  }

  .hero-content {
    text-align: center;
  }

  .hero-badge {
    font-size: 0.8rem;
    padding: 6px 14px;
    width: 100%;
    justify-content: center;
    box-sizing: border-box;
  }

  .hero-title {
    font-size: 2.1rem;
    line-height: 1.25;
  }

  .hero-subtitle {
    font-size: 1.05rem;
    margin-bottom: 30px;
  }

  /* 手机端按钮 100% 宽度，符合手指点击 48px 标准 */
  .hero-actions {
    flex-direction: column;
    width: 100%;
    gap: 14px;
    margin-bottom: 40px;
  }

  .btn {
    width: 100%;
    min-height: 48px;
    padding: 14px 24px;
    font-size: 1.05rem;
    box-sizing: border-box;
  }

  /* 核心指标手机端单栏列表 */
  .hero-stats {
    grid-template-columns: 1fr;
    padding: 20px;
    gap: 16px;
  }

  .stat-item {
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }

  .stat-item:last-child {
    border-bottom: none;
  }

  .stat-item h4 {
    font-size: 1.8rem;
  }

  /* 板块间距缩减 */
  .section {
    padding: 50px 0;
  }

  .section-title-wrap {
    margin-bottom: 36px;
  }

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

  .section-desc {
    font-size: 0.95rem;
  }

  /* 核心优势、流媒体 AI、价格、评价全部强行单栏 */
  .features-grid,
  .ecosystem-grid,
  .pricing-grid,
  .reviews-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .feature-card,
  .pricing-card,
  .review-card {
    padding: 28px 20px;
  }

  .eco-card {
    padding: 20px 16px;
  }

  /* 价格套餐在手机端为全宽度按钮 */
  .pricing-card .btn {
    width: 100%;
    min-height: 48px;
  }

  /* FAQ 折叠条适合手指点击 */
  summary {
    font-size: 1rem;
    min-height: 48px;
  }

  /* 页脚强行单栏全宽按钮式触摸导航 */
  .footer {
    padding: 40px 0 30px;
    margin-top: 40px;
  }

  .footer-nav {
    flex-direction: column;
    width: 100%;
    gap: 12px;
  }

  .footer-nav li {
    width: 100%;
  }

  .footer-nav a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 48px;
    font-size: 1rem;
    box-sizing: border-box;
  }

  /* 子页面手机端适配 */
  .page-hero {
    padding: 40px 0 20px;
  }

  .page-title {
    font-size: 2rem;
  }

  .page-body {
    padding: 24px 16px;
    margin-bottom: 40px;
  }

  .page-body h2 {
    font-size: 1.3rem;
  }
}