/* ==========================================================================
   一枝红杏网络加速器 - 核心样式表 (Enterprise Light & Bootstrap Admin Style)
   ========================================================================== */

:root {
  --primary-color: #3b82f6;
  --primary-hover: #2563eb;
  --primary-light: #eff6ff;
  --accent-color: #10b981;
  --accent-hover: #059669;
  --dark-text: #0f172a;
  --body-text: #334155;
  --muted-text: #64748b;
  --light-bg: #ffffff;
  --card-bg: #ffffff;
  --subtle-bg: #f8fafc;
  --border-color: #e2e8f0;
  --border-focus: #93c5fd;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-glow: 0 10px 25px -5px rgba(59, 130, 246, 0.25);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  background-color: var(--light-bg);
  color: var(--body-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  position: relative;
  overflow-x: hidden;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* Header & Nav */
.header-navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.875rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--dark-text);
  cursor: pointer;
  user-select: none;
  transition: transform var(--transition-fast);
}

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

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, #ec4899 0%, #ef4444 50%, #3b82f6 100%);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.25rem;
  box-shadow: 0 4px 10px rgba(239, 68, 68, 0.3);
}

.brand-text {
  background: linear-gradient(135deg, #1e293b 0%, #3b82f6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-link {
  font-weight: 600;
  color: var(--body-text);
  font-size: 0.95rem;
  transition: color var(--transition-fast);
}

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

.header-cta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color) 0%, #2563eb 100%);
  color: #ffffff !important;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  transform: translateY(-2px);
  box-shadow: 0 12px 20px -5px rgba(37, 99, 235, 0.4);
}

.btn-accent {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: #ffffff !important;
  box-shadow: 0 10px 25px -5px rgba(16, 185, 129, 0.3);
}

.btn-accent:hover {
  background: linear-gradient(135deg, #059669 0%, #047857 100%);
  transform: translateY(-2px);
  box-shadow: 0 12px 20px -5px rgba(16, 185, 129, 0.4);
}

.btn-outline {
  background: #ffffff;
  color: var(--dark-text) !important;
  border-color: var(--border-color);
  box-shadow: var(--shadow-sm);
}

.btn-outline:hover {
  background: var(--subtle-bg);
  border-color: #cbd5e1;
  transform: translateY(-2px);
}

.btn-lg {
  padding: 0.9rem 2rem;
  font-size: 1.05rem;
  border-radius: var(--radius-md);
}

.btn-sm {
  padding: 0.45rem 0.9rem;
  font-size: 0.85rem;
}

/* Sections Base */
.section {
  padding: 5rem 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  max-width: 750px;
  margin: 0 auto 3.5rem auto;
}

.badge {
  display: inline-block;
  padding: 0.35rem 0.85rem;
  font-size: 0.8rem;
  font-weight: 700;
  border-radius: 50px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.75rem;
}

.badge-primary {
  background-color: var(--primary-light);
  color: var(--primary-color);
  border: 1px solid var(--border-focus);
}

.badge-accent {
  background-color: #ecfdf5;
  color: var(--accent-color);
  border: 1px solid #a7f3d0;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--dark-text);
  line-height: 1.3;
  margin-bottom: 1rem;
  letter-spacing: -0.5px;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--muted-text);
  line-height: 1.6;
}

/* Hero Section */
.hero-section {
  padding: 5rem 1.5rem 6rem 1.5rem;
  background: radial-gradient(circle at top right, rgba(59, 130, 246, 0.06), transparent 50%),
              radial-gradient(circle at bottom left, rgba(16, 185, 129, 0.05), transparent 50%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3rem;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.hero-headline {
  font-size: 3rem;
  font-weight: 900;
  color: var(--dark-text);
  line-height: 1.2;
  letter-spacing: -1px;
}

.text-gradient {
  background: linear-gradient(135deg, #2563eb 0%, #ec4899 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-sub {
  font-size: 1.2rem;
  color: var(--muted-text);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
}

.hero-trust {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-size: 0.9rem;
  color: var(--muted-text);
  margin-top: 1rem;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.trust-item svg {
  color: var(--accent-color);
}

/* Hero Interactive Dashboard Widget */
.hero-widget {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-lg);
  position: relative;
}

.widget-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
  margin-bottom: 1.25rem;
}

.widget-title {
  font-weight: 700;
  font-size: 1rem;
  color: var(--dark-text);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.status-dot {
  width: 10px;
  height: 10px;
  background-color: var(--accent-color);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-color);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.widget-metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 1.25rem;
}

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

.metric-label {
  font-size: 0.8rem;
  color: var(--muted-text);
  margin-bottom: 0.25rem;
}

.metric-value {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--dark-text);
}

.node-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.node-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 0.85rem;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  transition: border-color var(--transition-fast);
}

.node-item:hover {
  border-color: var(--primary-color);
}

.node-flag {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 600;
}

.ping-tag {
  color: var(--accent-color);
  font-weight: 700;
  font-size: 0.8rem;
  background: #ecfdf5;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.25rem 1.75rem;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-focus);
}

.feature-icon-wrapper {
  width: 54px;
  height: 54px;
  border-radius: 14px;
  background: var(--primary-light);
  color: var(--primary-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 1.25rem;
}

.feature-card:nth-child(2) .feature-icon-wrapper {
  background: #ecfdf5;
  color: var(--accent-color);
}

.feature-card:nth-child(3) .feature-icon-wrapper {
  background: #fef2f2;
  color: #ef4444;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--dark-text);
  margin-bottom: 0.75rem;
}

.feature-desc {
  color: var(--muted-text);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Streaming & AI Cards */
.media-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.media-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  text-align: center;
  transition: all var(--transition-fast);
}

.media-card:hover {
  transform: translateY(-3px);
  border-color: var(--primary-color);
  box-shadow: var(--shadow-md);
}

.media-logo {
  font-size: 2.2rem;
  margin-bottom: 0.75rem;
  display: inline-block;
}

.media-name {
  font-weight: 700;
  color: var(--dark-text);
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.media-status {
  font-size: 0.8rem;
  color: var(--accent-color);
  font-weight: 600;
}

/* Pricing Section */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  align-items: stretch;
}

.pricing-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-normal);
  position: relative;
}

.pricing-card.featured {
  border: 2px solid var(--primary-color);
  box-shadow: var(--shadow-glow);
  transform: scale(1.02);
}

.featured-ribbon {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--primary-color), #2563eb);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 0.25rem 1rem;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.pricing-header {
  text-align: center;
  margin-bottom: 1.5rem;
}

.pricing-plan-name {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--dark-text);
  margin-bottom: 0.5rem;
}

.pricing-price {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--dark-text);
  line-height: 1;
}

.pricing-currency {
  font-size: 1.25rem;
  vertical-align: super;
}

.pricing-period {
  font-size: 0.85rem;
  color: var(--muted-text);
  font-weight: 500;
}

.pricing-features {
  list-style: none;
  margin-bottom: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.pricing-features li {
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--body-text);
}

.pricing-features li svg {
  color: var(--accent-color);
  flex-shrink: 0;
}

/* SEO Articles Section */
.articles-section {
  background-color: var(--subtle-bg);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  padding: 5rem 1.5rem;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.article-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-fast);
}

.article-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary-color);
  box-shadow: var(--shadow-md);
}

.article-tag {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary-color);
  background: var(--primary-light);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  width: fit-content;
  margin-bottom: 0.75rem;
}

.article-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--dark-text);
  line-height: 1.4;
  margin-bottom: 0.75rem;
}

.article-title a {
  color: var(--dark-text);
}

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

.article-excerpt {
  font-size: 0.875rem;
  color: var(--muted-text);
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-color);
  padding-top: 1rem;
  font-size: 0.8rem;
  color: var(--muted-text);
}

/* FAQ Accordion */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item.active {
  border-color: var(--primary-color);
}

.faq-question {
  padding: 1.25rem 1.5rem;
  font-weight: 700;
  color: var(--dark-text);
  font-size: 1.05rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}

.faq-icon {
  font-size: 1.2rem;
  transition: transform var(--transition-fast);
}

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

.faq-answer {
  padding: 0 1.5rem 1.25rem 1.5rem;
  color: var(--muted-text);
  font-size: 0.95rem;
  line-height: 1.6;
  display: none;
}

.faq-item.active .faq-answer {
  display: block;
}

/* User Reviews Section */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.review-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-stars {
  color: #f59e0b;
  font-size: 1.1rem;
  margin-bottom: 0.75rem;
}

.review-text {
  font-size: 0.95rem;
  color: var(--body-text);
  line-height: 1.6;
  margin-bottom: 1.25rem;
  font-style: italic;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.user-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #3b82f6, #ec4899);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 1.1rem;
}

.user-info-name {
  font-weight: 700;
  color: var(--dark-text);
  font-size: 0.95rem;
}

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

/* Footer Section */
.site-footer {
  background-color: #0f172a;
  color: #94a3b8;
  padding: 4rem 1.5rem 2rem 1.5rem;
  border-top: 1px solid #1e293b;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
  border-bottom: 1px solid #1e293b;
  padding-bottom: 2rem;
}

.footer-nav-link {
  color: #f8fafc;
  font-weight: 700;
  font-size: 1.05rem;
  transition: color var(--transition-fast);
}

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

.footer-pbn {
  text-align: center;
  margin-bottom: 2rem;
  padding: 1.5rem;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.pbn-title {
  color: #cbd5e1;
  font-size: 0.95rem;
  margin-bottom: 0.75rem;
  font-weight: 600;
}

.pbn-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.pbn-link {
  color: #38bdf8;
  font-weight: 700;
  font-size: 0.95rem;
  transition: all var(--transition-fast);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.pbn-link:hover {
  color: #7dd3fc;
}

.footer-copyright {
  text-align: center;
  font-size: 0.85rem;
  color: #64748b;
}

/* Floating Chapter Navigation Arrows (右侧上下移动箭头) */
.chapter-nav-widget {
  position: fixed;
  right: 1.5rem;
  bottom: 50%;
  transform: translateY(50%);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.nav-arrow-btn {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: #ffffff;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  color: var(--dark-text);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 1.25rem;
}

.nav-arrow-btn:hover {
  background: var(--primary-color);
  color: #ffffff;
  border-color: var(--primary-color);
  transform: scale(1.1);
  box-shadow: 0 6px 16px rgba(59, 130, 246, 0.4);
}

.nav-arrow-btn:active {
  transform: scale(0.95);
}

/* Responsive Styles (@media) */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .features-grid,
  .articles-grid,
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .media-grid,
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .pricing-card.featured {
    transform: none;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }

  .hero-headline {
    font-size: 2.2rem;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .features-grid,
  .media-grid,
  .pricing-grid,
  .articles-grid,
  .reviews-grid {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .footer-nav {
    flex-direction: column;
    gap: 1.25rem;
  }

  .pbn-links {
    flex-direction: column;
    gap: 0.75rem;
  }

  .chapter-nav-widget {
    right: 0.75rem;
    bottom: 2rem;
    transform: none;
  }

  .nav-arrow-btn {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
}