/* ==========================================================================
   AgentNeo 机场官网 (agentneo.homes) - 官方极速原生核心样式表
   零第三方框架 · 纯原生 CSS · 毫秒级秒开渲染 · 极客深色赛博霓虹美学
   ========================================================================== */

:root {
  --bg-main: #040812;
  --bg-card: rgba(12, 24, 47, 0.72);
  --bg-card-hover: rgba(16, 32, 62, 0.85);
  --bg-card-alt: rgba(8, 16, 32, 0.6);
  --border-color: rgba(56, 189, 248, 0.18);
  --border-focus: rgba(0, 245, 255, 0.55);

  --primary: #00f5ff;
  --primary-hover: #38bdf8;
  --primary-glow: rgba(0, 245, 255, 0.35);

  --accent-cyan: #38bdf8;
  --accent-blue: #3b82f6;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-purple: #8b5cf6;

  --text-main: #f8fafc;
  --text-sub: #cbd5e1;
  --text-muted: #94a3b8;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 26px;

  --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  font-family: var(--font-base);
  background-color: var(--bg-main);
  color: var(--text-main);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  position: relative;
  min-height: 100vh;
  line-height: 1.65;
  overflow-x: hidden;
  background-color: var(--bg-main);
}

/* 纯原生全屏动态 Canvas 容器 */
#dynamic-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
  opacity: 0.85;
}

/* 页面主要包装层 */
.site-wrapper {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* 通用容器 */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 渐变文本 */
.gradient-text {
  background: linear-gradient(135deg, #00f5ff 0%, #38bdf8 50%, #34d399 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nowrap-phrase {
  white-space: nowrap;
}

/* 顶部固定导航栏 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(4, 8, 18, 0.82);
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition-fast);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo-wrapper {
  display: flex;
  align-items: center;
  text-decoration: none;
  transition: transform var(--transition-fast);
}

.logo-wrapper:hover {
  transform: scale(1.02);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  color: var(--text-sub);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}

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

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width var(--transition-fast);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* 移动端汉堡菜单切换 */
.mobile-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  cursor: pointer;
}

.mobile-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-main);
  margin: 4px 0;
  transition: all var(--transition-fast);
}

/* 按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  font-size: 0.98rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.88rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 15px 34px;
  font-size: 1.08rem;
  border-radius: var(--radius-lg);
}

.btn-primary {
  background: linear-gradient(135deg, #00f5ff 0%, #0284c7 100%);
  color: #030814;
  font-weight: 700;
  box-shadow: 0 4px 20px rgba(0, 245, 255, 0.32);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 26px rgba(0, 245, 255, 0.5);
  background: linear-gradient(135deg, #38bdf8 0%, #0369a1 100%);
  color: #030814;
}

.btn-secondary {
  background: rgba(12, 24, 47, 0.85);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: rgba(20, 38, 72, 0.95);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}

.btn-pbn {
  background: rgba(16, 185, 129, 0.12);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.4);
}

.btn-pbn:hover {
  background: rgba(16, 185, 129, 0.22);
  border-color: #34d399;
  color: #ffffff;
  transform: translateY(-2px);
}

/* 区域通用内边距 */
.section-padding {
  padding: 85px 0;
}

.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 55px;
}

.section-tag {
  display: inline-block;
  padding: 5px 14px;
  background: rgba(0, 245, 255, 0.1);
  border: 1px solid rgba(0, 245, 255, 0.3);
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 14px;
}

.section-title {
  font-size: 2.3rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 16px;
  color: #ffffff;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* 1. Hero 首屏主视觉 */
.hero-section {
  padding: 70px 0 60px;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px;
  background: rgba(0, 245, 255, 0.08);
  border: 1px solid rgba(0, 245, 255, 0.25);
  border-radius: 30px;
  font-size: 0.9rem;
  color: var(--primary);
  margin-bottom: 24px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background: #34d399;
  border-radius: 50%;
  box-shadow: 0 0 10px #34d399;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(52, 211, 153, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(52, 211, 153, 0); }
}

.hero-title {
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -0.5px;
  margin-bottom: 22px;
  color: #ffffff;
}

.hero-subtitle {
  font-size: 1.18rem;
  color: var(--text-sub);
  max-width: 860px;
  margin: 0 auto 36px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 50px;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 1040px;
  margin: 0 auto;
}

.metric-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px 16px;
  backdrop-filter: blur(8px);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

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

.metric-val {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 6px;
}

.metric-label {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* 2. 产品核心优势网格 */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 34px 28px;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-focus);
  background: var(--bg-card-hover);
  box-shadow: 0 12px 30px rgba(0, 245, 255, 0.08);
}

.feature-icon-box {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  background: rgba(0, 245, 255, 0.1);
  border: 1px solid rgba(0, 245, 255, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 12px;
}

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

/* 3. AI 与流媒体解锁网格 */
.unlock-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.unlock-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 22px 18px;
  text-align: center;
  transition: all var(--transition-fast);
}

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

.unlock-icon {
  font-size: 2rem;
  margin-bottom: 10px;
}

.unlock-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 6px;
}

.unlock-status {
  font-size: 0.82rem;
  color: #34d399;
  font-weight: 600;
}

/* 4. 套餐价格表：严格要求所有价格同排并列展示 (All Prices in Same Row) */
.pricing-section {
  position: relative;
}

/* Desktop 4 列并列同排，卡片等高，内部按钮自动底端贴齐 */
.pricing-grid-same-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: all var(--transition-normal);
}

.pricing-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-focus);
  box-shadow: 0 16px 36px rgba(0, 245, 255, 0.12);
}

.pricing-card.featured {
  background: linear-gradient(180deg, rgba(14, 38, 74, 0.9) 0%, rgba(8, 20, 42, 0.85) 100%);
  border: 2px solid var(--primary);
  box-shadow: 0 0 30px rgba(0, 245, 255, 0.22);
}

.pricing-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #00f5ff, #0284c7);
  color: #030814;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 4px 16px;
  border-radius: 20px;
  letter-spacing: 0.5px;
  white-space: nowrap;
  box-shadow: 0 4px 12px rgba(0, 245, 255, 0.4);
}

.plan-header {
  text-align: center;
  padding-bottom: 22px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 22px;
}

.plan-name {
  font-size: 1.35rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 8px;
}

.plan-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  min-height: 40px;
  line-height: 1.5;
  margin-bottom: 14px;
}

.plan-price-box {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
  margin-bottom: 6px;
}

.price-currency {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--primary);
}

.price-amount {
  font-size: 2.6rem;
  font-weight: 900;
  line-height: 1;
  color: #ffffff;
}

.price-period {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.plan-sub-billing {
  font-size: 0.82rem;
  color: #38bdf8;
  font-weight: 600;
}

.plan-features {
  list-style: none;
  margin-bottom: 28px;
  flex-grow: 1;
}

.plan-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-sub);
  margin-bottom: 12px;
  line-height: 1.5;
}

.check-icon {
  color: #34d399;
  font-weight: 800;
  flex-shrink: 0;
}

.plan-action {
  margin-top: auto;
}

.plan-action .btn {
  width: 100%;
}

/* 5. 客户端生态 */
.clients-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.client-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: all var(--transition-fast);
}

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

.client-os-icon {
  font-size: 2.2rem;
  flex-shrink: 0;
}

.client-info h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 4px;
}

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

/* 6. 文章专栏网格 */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-fast);
}

.article-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-focus);
  box-shadow: 0 12px 28px rgba(0, 245, 255, 0.08);
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.article-tag {
  background: rgba(0, 245, 255, 0.1);
  color: var(--primary);
  padding: 3px 10px;
  border-radius: 12px;
  font-weight: 600;
}

.article-title {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.45;
  margin-bottom: 12px;
}

.article-title a {
  color: #ffffff;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.article-title a:hover {
  color: var(--primary);
}

.article-excerpt {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-read-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--primary);
  text-decoration: none;
  transition: gap var(--transition-fast);
}

.article-read-more:hover {
  gap: 10px;
  color: #ffffff;
}

/* 7. 用户评价 (Testimonials) */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

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

.review-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-focus);
}

.review-stars {
  color: #facc15;
  font-size: 1.15rem;
  margin-bottom: 14px;
  letter-spacing: 2px;
}

.review-quote {
  font-size: 0.95rem;
  color: var(--text-sub);
  line-height: 1.7;
  margin-bottom: 22px;
  font-style: italic;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 14px;
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #00f5ff, #3b82f6);
  color: #030814;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.author-name {
  font-size: 0.92rem;
  font-weight: 700;
  color: #ffffff;
}

.author-role {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* 8. 常见问题 FAQ (手风琴) */
.faq-container {
  max-width: 860px;
  margin: 0 auto 50px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--border-focus);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  font-size: 1.05rem;
  font-weight: 700;
  color: #ffffff;
  user-select: none;
}

.faq-toggle-icon {
  font-size: 1.4rem;
  color: var(--primary);
  transition: transform var(--transition-fast);
  line-height: 1;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  background: rgba(8, 16, 32, 0.4);
  padding: 0 24px;
}

.faq-answer p {
  color: var(--text-sub);
  font-size: 0.95rem;
  line-height: 1.7;
  padding-bottom: 20px;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding: 10px 24px 0;
}

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

/* 转化横幅 */
.cta-banner {
  background: linear-gradient(135deg, rgba(0, 245, 255, 0.15) 0%, rgba(59, 130, 246, 0.15) 100%);
  border: 1px solid rgba(0, 245, 255, 0.4);
  border-radius: var(--radius-xl);
  padding: 55px 40px;
  text-align: center;
  max-width: 960px;
  margin: 40px auto 0;
  box-shadow: 0 10px 40px rgba(0, 245, 255, 0.1);
}

.cta-banner h2 {
  font-size: 2.1rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 14px;
}

.cta-banner p {
  font-size: 1.05rem;
  color: var(--text-sub);
  max-width: 680px;
  margin: 0 auto 28px;
}

/* 9. 页脚 Footer */
.site-footer {
  background: rgba(3, 6, 14, 0.95);
  border-top: 1px solid var(--border-color);
  padding: 70px 0 30px;
  margin-top: 60px;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  padding-bottom: 50px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-top: 16px;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 18px;
  letter-spacing: 0.5px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.88rem;
  transition: color var(--transition-fast);
}

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

.external-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.external-links-list a {
  color: var(--text-sub);
  text-decoration: none;
  font-size: 0.88rem;
  transition: color var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.external-links-list a:hover {
  color: var(--primary);
  text-decoration: underline;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 28px;
  font-size: 0.82rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 14px;
}

/* 响应式媒体查询 */
@media (max-width: 1100px) {
  .pricing-grid-same-row {
    grid-template-columns: repeat(2, 1fr);
  }
  .articles-grid, .reviews-grid, .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .clients-grid, .unlock-grid, .hero-metrics {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.2rem;
  }
  .hero-subtitle {
    font-size: 1rem;
  }
  .section-title {
    font-size: 1.8rem;
  }
  .pricing-grid-same-row {
    grid-template-columns: 1fr;
  }
  .articles-grid, .reviews-grid, .features-grid, .hero-metrics, .clients-grid, .unlock-grid {
    grid-template-columns: 1fr;
  }
  .nav-menu {
    display: none;
  }
  .mobile-toggle {
    display: block;
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}