/* ===================================================================
   迷雾通 (Miwutong) - 风格方案 9：量子折射三棱镜风 (Quantum Dispersion & Optical Haze)
   Pure Native CSS | Zero External Dependencies | Maximum Performance
   =================================================================== */

:root {
  /* 量子深空与晶体基底色 */
  --bg-dark: #080b12;
  --bg-surface: #0e1320;
  --bg-card: rgba(14, 19, 32, 0.75);
  --bg-card-hover: rgba(20, 27, 46, 0.88);

  /* 三棱镜量子折射光谱 (Spectral Dispersion) */
  --prism-cyan: #06b6d4;
  --prism-blue: #3b82f6;
  --prism-indigo: #6366f1;
  --prism-violet: #8b5cf6;
  --prism-pink: #ec4899;
  --prism-emerald: #10b981;
  --prism-amber: #f59e0b;

  /* 文字体系 */
  --text-main: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  /* 晶体边缘与光学高光 */
  --border-light: rgba(255, 255, 255, 0.08);
  --border-facet: rgba(139, 92, 246, 0.25);
  --border-prism-glow: 0 0 25px rgba(99, 102, 241, 0.35);

  /* 量子光谱渐变 (Quantum Rainbow Spectrum) */
  --gradient-brand: linear-gradient(135deg, #06b6d4 0%, #3b82f6 32%, #8b5cf6 68%, #ec4899 100%);
  --gradient-spectral-beam: linear-gradient(90deg, #06b6d4, #3b82f6, #8b5cf6, #ec4899, #f59e0b);
  --gradient-btn: linear-gradient(135deg, #0284c7 0%, #4f46e5 50%, #7c3aed 100%);
  --gradient-btn-hover: linear-gradient(135deg, #0ea5e9 0%, #6366f1 50%, #9333ea 100%);
  --gradient-blog: linear-gradient(135deg, #059669 0%, #0284c7 100%);
  --gradient-blog-hover: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
  --gradient-crystal: linear-gradient(180deg, rgba(255, 255, 255, 0.06) 0%, rgba(139, 92, 246, 0.02) 100%);

  /* 布局与圆角 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --container-max: 1200px;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-family);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
  background-color: var(--bg-dark);
  /* 迷雾深空中的量子折射光斑环境 (Optical Haze Mesh) */
  background-image: 
    radial-gradient(circle 800px at 50% -10%, rgba(99, 102, 241, 0.16), transparent 75%),
    radial-gradient(circle 600px at 85% 25%, rgba(6, 182, 212, 0.12), transparent 70%),
    radial-gradient(circle 700px at 15% 65%, rgba(236, 72, 153, 0.09), transparent 70%),
    radial-gradient(circle 800px at 80% 90%, rgba(16, 185, 129, 0.08), transparent 70%);
  background-attachment: fixed;
}

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

img, svg {
  vertical-align: middle;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* Typography Helpers */
.gradient-text {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
  text-shadow: 0 0 30px rgba(99, 102, 241, 0.3);
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 56px auto;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: rgba(139, 92, 246, 0.12);
  border: 1px solid rgba(139, 92, 246, 0.35);
  color: #c084fc;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 1px;
  margin-bottom: 16px;
  text-transform: uppercase;
  box-shadow: 0 0 16px rgba(139, 92, 246, 0.2);
}

.section-title {
  font-size: clamp(1.85rem, 3.5vw, 2.75rem);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

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

/* ===================================================================
   Navbar Component (量子晶体磨砂导航)
   =================================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(8, 11, 18, 0.82);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition-smooth);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.5px;
}

.logo-icon-box {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: var(--gradient-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.6), inset 0 1px 1px rgba(255, 255, 255, 0.4);
}

.logo-icon-box svg {
  width: 22px;
  height: 22px;
  fill: #ffffff;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 30px;
  list-style: none;
}

.nav-link {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 500;
  position: relative;
  padding: 6px 0;
}

.nav-link:hover {
  color: #ffffff;
  text-shadow: 0 0 12px rgba(6, 182, 212, 0.6);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-brand);
  transition: width var(--transition-fast);
  box-shadow: 0 0 8px rgba(99, 102, 241, 0.8);
}

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

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-smooth);
  border: none;
  white-space: nowrap;
}

.btn-nav-login {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-main);
  border: 1px solid var(--border-light);
  padding: 8px 18px;
  backdrop-filter: blur(8px);
}

.btn-nav-login:hover {
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(255, 255, 255, 0.25);
  color: #ffffff;
  box-shadow: 0 0 15px rgba(255, 255, 255, 0.1);
}

.btn-nav-primary {
  background: var(--gradient-btn);
  color: #ffffff;
  padding: 8px 20px;
  box-shadow: 0 4px 18px rgba(79, 70, 229, 0.45);
  position: relative;
  overflow: hidden;
}

.btn-nav-primary:hover {
  background: var(--gradient-btn-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(124, 58, 237, 0.65);
}

/* Mobile Toggle */
.menu-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-main);
  cursor: pointer;
  padding: 8px;
}

.menu-toggle svg {
  width: 26px;
  height: 26px;
  fill: currentColor;
}

#nav-toggle-check {
  display: none;
}

/* ===================================================================
   Hero Section (量子折射穿透全景)
   =================================================================== */
.hero-section {
  padding: 170px 0 110px 0;
  position: relative;
  text-align: center;
  overflow: hidden;
}

.hero-section::before {
  content: "";
  position: absolute;
  top: 10%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 350px;
  background: radial-gradient(ellipse at center, rgba(139, 92, 246, 0.22) 0%, rgba(6, 182, 212, 0.1) 50%, transparent 80%);
  filter: blur(50px);
  pointer-events: none;
  z-index: 0;
}

.hero-content {
  max-width: 900px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.promo-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.15) 0%, rgba(236, 72, 153, 0.12) 100%);
  border: 1px solid rgba(245, 158, 11, 0.4);
  color: #fde047;
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 28px;
  animation: prism-pulse 3s infinite;
  box-shadow: 0 0 20px rgba(245, 158, 11, 0.25);
}

.promo-badge svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

@keyframes prism-pulse {
  0%, 100% {
    box-shadow: 0 0 15px rgba(245, 158, 11, 0.25);
    border-color: rgba(245, 158, 11, 0.4);
  }
  50% {
    box-shadow: 0 0 28px rgba(236, 72, 153, 0.4);
    border-color: rgba(236, 72, 153, 0.6);
  }
}

.hero-title {
  font-size: clamp(2.4rem, 5.2vw, 4.1rem);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -1px;
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  color: var(--text-secondary);
  line-height: 1.75;
  max-width: 740px;
  margin: 0 auto 42px auto;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 22px;
  flex-wrap: wrap;
  margin-bottom: 50px;
}

.btn-hero-primary {
  background: var(--gradient-btn);
  color: #ffffff;
  font-size: 1.15rem;
  font-weight: 700;
  padding: 16px 38px;
  border-radius: var(--radius-lg);
  box-shadow: 0 10px 30px rgba(79, 70, 229, 0.5), inset 0 1px 1px rgba(255, 255, 255, 0.35);
  position: relative;
  overflow: hidden;
}

.btn-hero-primary::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
  transition: 0.6s;
}

.btn-hero-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 40px rgba(124, 58, 237, 0.7);
}

.btn-hero-primary:hover::after {
  left: 100%;
}

.btn-hero-blog {
  background: rgba(16, 185, 129, 0.12);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.4);
  font-size: 1.15rem;
  font-weight: 700;
  padding: 16px 38px;
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 20px rgba(16, 185, 129, 0.15);
}

.btn-hero-blog:hover {
  background: var(--gradient-blog);
  color: #ffffff;
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(16, 185, 129, 0.45);
}

.hero-trust-badges {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  flex-wrap: wrap;
  color: var(--text-muted);
  font-size: 0.92rem;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.trust-item svg {
  width: 18px;
  height: 18px;
  color: var(--prism-emerald);
  fill: currentColor;
}

/* ===================================================================
   Core Dynamic Cards (三棱镜晶体折射卡片)
   =================================================================== */
.features-section {
  padding: 90px 0;
  position: relative;
}

.core-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 48px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: 38px 30px;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(14px);
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-brand);
  opacity: 0.4;
  transition: opacity var(--transition-fast), height var(--transition-fast);
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-facet);
  background: var(--bg-card-hover);
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.45), var(--border-prism-glow);
}

.feature-card:hover::before {
  opacity: 1;
  height: 3px;
}

.feature-icon-wrapper {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.15) 0%, rgba(139, 92, 246, 0.15) 100%);
  border: 1px solid rgba(139, 92, 246, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  box-shadow: 0 0 15px rgba(6, 182, 212, 0.2);
}

.feature-icon-wrapper svg {
  width: 32px;
  height: 32px;
  fill: var(--prism-cyan);
}

.feature-card:nth-child(2) .feature-icon-wrapper svg {
  fill: var(--prism-violet);
}

.feature-card:nth-child(3) .feature-icon-wrapper svg {
  fill: var(--prism-emerald);
}

.feature-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--text-main);
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Unlock Box (AI & Streaming) */
.unlock-wrapper {
  background: linear-gradient(135deg, rgba(14, 19, 32, 0.85) 0%, rgba(26, 33, 56, 0.85) 100%);
  border: 1px solid var(--border-facet);
  border-radius: var(--radius-xl);
  padding: 42px 36px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

.unlock-header {
  text-align: center;
  margin-bottom: 36px;
}

.unlock-title {
  font-size: 1.65rem;
  font-weight: 800;
  margin-bottom: 10px;
}

.unlock-subtitle {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.unlock-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.unlock-box {
  background: rgba(9, 13, 22, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-lg);
  padding: 30px;
}

.unlock-box-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
}

.unlock-badge-icon {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: rgba(99, 102, 241, 0.18);
  border: 1px solid rgba(99, 102, 241, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
}

.unlock-badge-icon svg {
  width: 24px;
  height: 24px;
  fill: var(--prism-indigo);
}

.unlock-box-title {
  font-size: 1.18rem;
  font-weight: 700;
}

.unlock-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.unlock-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.09);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  color: var(--text-main);
  font-weight: 500;
}

.unlock-tag.active {
  border-color: rgba(16, 185, 129, 0.45);
  background: rgba(16, 185, 129, 0.12);
  color: #34d399;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--prism-emerald);
  box-shadow: 0 0 8px var(--prism-emerald);
}

/* ===================================================================
   Pricing Section (光谱折射光环定价卡片)
   =================================================================== */
.pricing-section {
  padding: 90px 0;
  position: relative;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: 42px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition-smooth);
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: rgba(139, 92, 246, 0.35);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.5);
}

.pricing-card.featured {
  background: linear-gradient(180deg, rgba(26, 32, 54, 0.95) 0%, rgba(14, 18, 32, 0.95) 100%);
  border: 2px solid transparent;
  background-clip: padding-box;
  box-shadow: 0 15px 50px rgba(99, 102, 241, 0.3);
  transform: scale(1.03);
  position: relative;
}

.pricing-card.featured::before {
  content: "";
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: var(--gradient-brand);
  border-radius: calc(var(--radius-xl) + 2px);
  z-index: -1;
  box-shadow: 0 0 30px rgba(99, 102, 241, 0.4);
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-6px);
}

.pricing-badge-popular {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-brand);
  color: #ffffff;
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  padding: 6px 20px;
  border-radius: var(--radius-full);
  letter-spacing: 1px;
  box-shadow: 0 4px 18px rgba(139, 92, 246, 0.6);
}

.pricing-plan-name {
  font-size: 1.55rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.pricing-plan-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
  min-height: 42px;
}

.pricing-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-light);
}

.pricing-currency {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--prism-cyan);
}

.pricing-amount {
  font-size: 3.1rem;
  font-weight: 900;
  line-height: 1;
  color: var(--text-main);
}

.pricing-period {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.pricing-traffic-highlight {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.25);
  padding: 8px 14px;
  border-radius: var(--radius-md);
  margin-bottom: 24px;
  color: var(--prism-cyan);
  font-weight: 700;
  font-size: 0.95rem;
}

.featured .pricing-traffic-highlight {
  background: rgba(139, 92, 246, 0.15);
  border-color: rgba(139, 92, 246, 0.4);
  color: #c084fc;
}

.pricing-features-list {
  list-style: none;
  margin-bottom: 32px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.pricing-feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.pricing-feature-item svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  fill: var(--prism-emerald);
}

.pricing-cta-btn {
  width: 100%;
  padding: 14px 24px;
  border-radius: var(--radius-lg);
  font-weight: 700;
  font-size: 1rem;
  text-align: center;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-main);
  border: 1px solid var(--border-light);
  transition: var(--transition-smooth);
}

.pricing-cta-btn:hover {
  background: rgba(255, 255, 255, 0.16);
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.3);
}

.featured .pricing-cta-btn {
  background: var(--gradient-btn);
  color: #ffffff;
  border: none;
  box-shadow: 0 6px 24px rgba(99, 102, 241, 0.45);
}

.featured .pricing-cta-btn:hover {
  box-shadow: 0 8px 30px rgba(139, 92, 246, 0.7);
  transform: translateY(-2px);
}

/* ===================================================================
   Why Choose Section (量子遥测面板 & 极客终端)
   =================================================================== */
.why-us-section {
  padding: 90px 0;
  position: relative;
}

.why-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 80px;
}

.why-row:last-child {
  margin-bottom: 0;
}

.why-text-block {
  max-width: 520px;
}

.why-title {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 20px;
}

.why-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 24px;
}

.why-bullet-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.why-bullet-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.95rem;
  color: var(--text-main);
}

.why-bullet-item svg {
  width: 20px;
  height: 20px;
  fill: var(--prism-cyan);
  flex-shrink: 0;
  margin-top: 2px;
}

/* Visual Dynamic Stats Panel (Row 1 Right) */
.data-panel-card {
  background: var(--bg-card);
  border: 1px solid var(--border-facet);
  border-radius: var(--radius-xl);
  padding: 34px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.45), 0 0 25px rgba(99, 102, 241, 0.15);
}

.panel-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 20px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border-light);
}

.panel-status-live {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--prism-emerald);
}

.stats-grid-quad {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-bottom: 24px;
}

.stat-metric-box {
  background: rgba(9, 13, 22, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-md);
  padding: 18px;
}

.metric-val {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.1;
  margin-bottom: 6px;
}

.metric-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.network-graph-bar {
  background: rgba(9, 13, 22, 0.85);
  border-radius: var(--radius-md);
  padding: 16px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.graph-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.progress-track {
  height: 8px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 98.4%;
  background: var(--gradient-brand);
  border-radius: var(--radius-full);
  box-shadow: 0 0 12px rgba(99, 102, 241, 0.7);
}

/* Geek Terminal Window (Row 2 Left) */
.terminal-window {
  background: #060910;
  border: 1px solid rgba(139, 92, 246, 0.35);
  border-radius: var(--radius-lg);
  box-shadow: 0 16px 45px rgba(0, 0, 0, 0.7), 0 0 20px rgba(139, 92, 246, 0.15);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  overflow: hidden;
}

.terminal-header {
  background: #0d121f;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.terminal-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.terminal-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.dot-red { background: #ef4444; }
.dot-yellow { background: #f59e0b; }
.dot-green { background: #10b981; }

.terminal-title {
  color: #94a3b8;
  font-size: 0.85rem;
  font-weight: 500;
}

.terminal-body {
  padding: 22px;
  font-size: 0.88rem;
  line-height: 1.8;
  color: #e2e8f0;
}

.terminal-line {
  margin-bottom: 8px;
}

.term-prompt {
  color: #38bdf8;
  margin-right: 8px;
}

.term-cmd {
  color: #f8fafc;
  font-weight: 600;
}

.term-success {
  color: #34d399;
}

.term-dim {
  color: #64748b;
}

.term-cursor {
  display: inline-block;
  width: 8px;
  height: 16px;
  background-color: var(--prism-cyan);
  vertical-align: middle;
  animation: cursor-blink 1s infinite;
  box-shadow: 0 0 8px var(--prism-cyan);
}

@keyframes cursor-blink {
  0%, 49% { opacity: 1; }
  50%, 100% { opacity: 0; }
}

/* ===================================================================
   Testimonials Marquee Section
   =================================================================== */
.testimonials-section {
  padding: 90px 0;
  position: relative;
  overflow: hidden;
}

.marquee-container {
  display: flex;
  overflow: hidden;
  user-select: none;
  gap: 24px;
  position: relative;
  mask-image: linear-gradient(to right, transparent 0%, black 10%, black 90%, transparent 100%);
  -webkit-mask-image: linear-gradient(to right, transparent 0%, black 10%, black 90%, transparent 100%);
}

.marquee-track {
  display: flex;
  gap: 24px;
  flex-shrink: 0;
  animation: marquee-scroll 32s linear infinite;
}

.marquee-track:hover {
  animation-play-state: paused;
}

@keyframes marquee-scroll {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(-100%);
  }
}

.testimonial-card {
  width: 360px;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 28px;
  flex-shrink: 0;
  transition: var(--transition-fast);
}

.testimonial-card:hover {
  border-color: rgba(139, 92, 246, 0.4);
  background: var(--bg-card-hover);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.35);
}

.review-stars {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
  color: #fbbf24;
}

.review-stars svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.review-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}

.reviewer-meta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.reviewer-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  color: #ffffff;
  box-shadow: 0 0 12px rgba(99, 102, 241, 0.5);
}

.reviewer-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
}

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

/* ===================================================================
   FAQ Section (Accordion Details & Summary)
   =================================================================== */
.faq-section {
  padding: 90px 0;
  position: relative;
}

.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition-smooth);
}

.faq-item:hover {
  border-color: rgba(139, 92, 246, 0.3);
}

.faq-item[open] {
  border-color: var(--border-facet);
  background: rgba(18, 24, 40, 0.85);
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.15);
}

.faq-question {
  padding: 22px 28px;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
  list-style: none;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-toggle-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  fill: var(--text-secondary);
  transition: transform var(--transition-smooth);
}

.faq-item[open] .faq-toggle-icon {
  transform: rotate(180deg);
  fill: var(--prism-cyan);
}

.faq-answer {
  padding: 0 28px 24px 28px;
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.8;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  padding-top: 18px;
}

/* ===================================================================
   CTA Section (底部光谱汇聚转化区)
   =================================================================== */
.cta-section {
  padding: 90px 0 120px 0;
  position: relative;
}

.cta-banner-box {
  background: radial-gradient(ellipse at center, rgba(79, 70, 229, 0.4) 0%, rgba(14, 19, 32, 0.98) 100%);
  border: 1px solid var(--border-facet);
  box-shadow: 0 25px 70px rgba(0, 0, 0, 0.6), 0 0 40px rgba(99, 102, 241, 0.25);
  border-radius: var(--radius-xl);
  padding: 70px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-banner-box::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-spectral-beam);
}

.cta-banner-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  margin-bottom: 20px;
  line-height: 1.2;
}

.cta-banner-desc {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto 36px auto;
}

.btn-cta-giant {
  background: var(--gradient-brand);
  color: #ffffff;
  font-size: 1.25rem;
  font-weight: 800;
  padding: 18px 48px;
  border-radius: var(--radius-lg);
  box-shadow: 0 12px 35px rgba(124, 58, 237, 0.55), inset 0 1px 1px rgba(255, 255, 255, 0.35);
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.btn-cta-giant:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 18px 50px rgba(139, 92, 246, 0.75);
}

/* ===================================================================
   Footer (严格四个标题)
   =================================================================== */
.site-footer {
  border-top: 1px solid var(--border-light);
  background: #05070c;
  padding: 48px 0 36px 0;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.footer-link {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: var(--transition-fast);
}

.footer-link:hover {
  color: var(--prism-cyan);
  text-shadow: 0 0 10px rgba(6, 182, 212, 0.6);
}

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

/* ===================================================================
   Sub-Pages Styles (About, Terms, Privacy, Sitemap)
   =================================================================== */
.page-header {
  padding: 145px 0 60px 0;
  text-align: center;
  border-bottom: 1px solid var(--border-light);
  background: radial-gradient(ellipse 70% 50% at 50% 0%, rgba(99, 102, 241, 0.18), transparent);
}

.page-title {
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  font-weight: 800;
  margin-bottom: 16px;
}

.page-subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 640px;
  margin: 0 auto;
}

.article-content {
  padding: 60px 0 100px 0;
  max-width: 860px;
  margin: 0 auto;
}

.article-section {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 36px;
  margin-bottom: 32px;
}

.article-section h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--prism-cyan);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.article-section h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-main);
  margin: 20px 0 10px 0;
}

.article-section p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 14px;
  font-size: 1rem;
}

.article-section ul {
  padding-left: 20px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.article-section li {
  margin-bottom: 8px;
}

/* ===================================================================
   SEO Articles & News Hub Styles (news-8d3f.html)
   =================================================================== */
.articles-hub-section {
  padding: 40px 0 100px 0;
}

.articles-toc-box {
  background: var(--bg-card);
  border: 1px solid var(--border-facet);
  border-radius: var(--radius-xl);
  padding: 32px;
  margin-bottom: 50px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

.toc-title {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--prism-cyan);
}

.toc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 14px;
}

.toc-link-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  font-size: 0.92rem;
  color: var(--text-secondary);
  transition: var(--transition-fast);
}

.toc-link-item:hover {
  background: rgba(99, 102, 241, 0.12);
  border-color: var(--border-facet);
  color: #ffffff;
  transform: translateX(4px);
}

.toc-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  background: rgba(99, 102, 241, 0.25);
  color: #c084fc;
  border-radius: 50%;
  font-size: 0.8rem;
  font-weight: 700;
  flex-shrink: 0;
}

.seo-article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: 48px 40px;
  margin-bottom: 60px;
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.45);
  position: relative;
  scroll-margin-top: 100px;
}

.seo-article-header {
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 28px;
  margin-bottom: 32px;
}

.seo-article-meta {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.seo-meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.seo-meta-item svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.seo-article-h1 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  line-height: 1.35;
  margin-bottom: 16px;
  color: var(--text-main);
}

.seo-article-summary {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.8;
  background: rgba(255, 255, 255, 0.02);
  border-left: 4px solid var(--prism-indigo);
  padding: 16px 20px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.seo-article-body {
  font-size: 1.02rem;
  line-height: 1.9;
  color: #cbd5e1;
}

.seo-article-body h2 {
  font-size: 1.45rem;
  font-weight: 700;
  color: #ffffff;
  margin: 36px 0 18px 0;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  gap: 10px;
}

.seo-article-body h2::before {
  content: "";
  display: inline-block;
  width: 5px;
  height: 20px;
  background: var(--gradient-brand);
  border-radius: 3px;
}

.seo-article-body h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--prism-cyan);
  margin: 24px 0 12px 0;
}

.seo-article-body p {
  margin-bottom: 18px;
}

.seo-article-body ul, .seo-article-body ol {
  padding-left: 24px;
  margin-bottom: 20px;
}

.seo-article-body li {
  margin-bottom: 10px;
}

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

.pbn-highlight-link:hover {
  color: #7dd3fc;
  text-decoration-color: #38bdf8;
}

.internal-brand-link {
  color: #34d399;
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: var(--transition-fast);
}

.internal-brand-link:hover {
  color: #6ee7b7;
}

.seo-table-wrapper {
  overflow-x: auto;
  margin: 24px 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
}

.seo-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

.seo-table th {
  background: rgba(26, 32, 54, 0.85);
  color: #ffffff;
  padding: 14px 18px;
  font-weight: 700;
  border-bottom: 1px solid var(--border-light);
}

.seo-table td {
  padding: 14px 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--text-secondary);
}

.seo-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

.seo-code-block {
  background: #060910;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 18px 22px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.88rem;
  color: #e2e8f0;
  line-height: 1.7;
  overflow-x: auto;
  margin: 20px 0;
}

/* ===================================================================
   Responsive Media Queries (@media)
   =================================================================== */
@media (max-width: 1024px) {
  .core-grid,
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .pricing-card.featured {
    transform: none;
    order: -1;
  }

  .pricing-card.featured:hover {
    transform: translateY(-6px);
  }

  .why-row {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .why-text-block {
    max-width: 100%;
  }

  .why-row:nth-child(2) .terminal-window {
    order: 2;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 74px;
    left: 0;
    width: 100%;
    background: #080b12;
    border-bottom: 1px solid var(--border-light);
    flex-direction: column;
    padding: 24px;
    gap: 18px;
    text-align: center;
    box-shadow: 0 20px 30px rgba(0, 0, 0, 0.8);
  }

  #nav-toggle-check:checked ~ .nav-container .nav-menu {
    display: flex;
  }

  .menu-toggle {
    display: block;
  }

  .nav-actions .btn-nav-login {
    display: none;
  }

  .core-grid,
  .pricing-grid,
  .unlock-grid {
    grid-template-columns: 1fr;
  }

  .hero-section {
    padding: 125px 0 65px 0;
  }

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

  .hero-cta-group .btn {
    width: 100%;
    padding: 16px;
  }

  .footer-nav {
    gap: 20px;
  }

  .cta-banner-box {
    padding: 48px 20px;
  }

  .btn-cta-giant {
    width: 100%;
    font-size: 1.1rem;
    padding: 16px 20px;
  }

  .testimonial-card {
    width: 300px;
  }
}

@media (max-width: 480px) {
  .stats-grid-quad {
    grid-template-columns: 1fr;
  }

  .data-panel-card {
    padding: 20px;
  }

  .terminal-body {
    padding: 16px 14px;
    font-size: 0.8rem;
  }
}