/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: all var(--transition-normal);
  border-bottom: 1px solid transparent;
}

.navbar.scrolled {
  background: rgba(10, 10, 10, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: var(--border);
  padding: 12px 0;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-primary);
}

.logo-icon {
  width: 32px;
  height: 32px;
  background: var(--accent-gradient);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-links {
  display: none;
  align-items: center;
  gap: 32px;
}

@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }
}

.nav-link {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}

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

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

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-gradient);
  border-radius: 2px;
}

.nav-cta {
  display: none;
}

@media (min-width: 768px) {
  .nav-cta {
    display: inline-flex;
  }
}

.mobile-menu-btn {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  z-index: 1001;
}

@media (min-width: 768px) {
  .mobile-menu-btn {
    display: none;
  }
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-fast);
  transform-origin: center;
}

.mobile-menu-btn.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10, 10, 10, 0.98);
  backdrop-filter: blur(20px);
  z-index: 999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 32px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.mobile-menu.active {
  opacity: 1;
  visibility: visible;
}

.mobile-menu a {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.mobile-menu a:hover,
.mobile-menu a.active {
  color: var(--text-primary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent-gradient);
  color: white;
  box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
  box-shadow: 0 6px 30px rgba(59, 130, 246, 0.5);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--card-bg);
  color: var(--text-primary);
  border: 1px solid var(--card-border);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-ghost {
  color: var(--text-secondary);
  padding: 8px 16px;
}

.btn-ghost:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.btn-sm {
  padding: 8px 20px;
  font-size: 0.875rem;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1rem;
}

/* Cards */
.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: var(--shadow-glow);
}

.card:hover::before {
  opacity: 1;
}

.card-icon {
  width: 48px;
  height: 48px;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--accent-blue);
}

.card-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.card-text {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Glass Card */
.glass-card {
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 32px;
}

/* Feature List */
.feature-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

.feature-item svg {
  color: var(--success);
  flex-shrink: 0;
}

/* Pricing Card */
.pricing-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-xl);
  padding: 40px 32px;
  transition: all var(--transition-normal);
  position: relative;
}

.pricing-card:hover {
  border-color: rgba(255, 255, 255, 0.2);
}

.pricing-card.popular {
  border-color: rgba(59, 130, 246, 0.4);
  box-shadow: var(--shadow-glow);
}

.pricing-card.popular::before {
  content: '推荐';
  position: absolute;
  top: -1px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-gradient);
  color: white;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 16px;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
}

.pricing-name {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.pricing-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.pricing-price {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 24px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.pricing-price .currency {
  font-size: 1.5rem;
  font-weight: 600;
}

.pricing-price .period {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  font-weight: 400;
}

/* Testimonial Card */
.testimonial-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.testimonial-text {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 24px;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.testimonial-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 0.875rem;
}

.testimonial-info {
  display: flex;
  flex-direction: column;
}

.testimonial-name {
  font-weight: 600;
  font-size: 0.9375rem;
}

.testimonial-role {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Team Card */
.team-card {
  text-align: center;
}

.team-avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--bg-secondary), var(--bg-tertiary));
  border: 2px solid var(--card-border);
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-muted);
}

.team-name {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.team-role {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 60px 0 32px;
  background: var(--bg-secondary);
}

.footer-grid {
  display: grid;
  gap: 40px;
  margin-bottom: 48px;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 2fr repeat(3, 1fr);
  }
}

.footer-brand {
  max-width: 300px;
}

.footer-brand .logo {
  margin-bottom: 16px;
}

.footer-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}

.footer-social {
  display: flex;
  gap: 12px;
}

.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.2);
  color: var(--text-primary);
}

.footer-title {
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  text-align: center;
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}

.footer-copyright {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.footer-legal {
  display: flex;
  gap: 24px;
}

.footer-legal a {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.footer-legal a:hover {
  color: var(--text-secondary);
}

/* Toggle Switch */
.toggle {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
}

.toggle-track {
  width: 48px;
  height: 26px;
  background: var(--bg-tertiary);
  border: 1px solid var(--card-border);
  border-radius: 13px;
  position: relative;
  transition: all var(--transition-fast);
}

.toggle-track.active {
  background: var(--accent-blue);
  border-color: var(--accent-blue);
}

.toggle-thumb {
  width: 20px;
  height: 20px;
  background: white;
  border-radius: 50%;
  position: absolute;
  top: 2px;
  left: 2px;
  transition: transform var(--transition-fast);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.toggle-track.active .toggle-thumb {
  transform: translateX(22px);
}

.toggle-label {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.toggle-label.active {
  color: var(--text-primary);
}

/* FAQ */
.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0;
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
  color: var(--text-primary);
}

.faq-question svg {
  transition: transform var(--transition-fast);
  flex-shrink: 0;
  margin-left: 16px;
}

.faq-item.active .faq-question svg {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal), padding var(--transition-normal);
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding-bottom: 24px;
}

.faq-answer p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Timeline */
.timeline {
  position: relative;
  padding-left: 32px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 6px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent-blue), var(--accent-purple));
}

.timeline-item {
  position: relative;
  padding-bottom: 40px;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -30px;
  top: 4px;
  width: 14px;
  height: 14px;
  background: var(--bg-primary);
  border: 2px solid var(--accent-blue);
  border-radius: 50%;
}

.timeline-date {
  font-size: 0.875rem;
  color: var(--accent-blue);
  font-weight: 600;
  margin-bottom: 4px;
}

.timeline-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.timeline-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Stats */
.stat-value {
  font-size: 2.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, #fff, #a1a1aa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 100px;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.2);
  color: var(--accent-blue);
}