/* ==========================================================================
   BoostNet - Ambient Aurora Borealis & Ethereal Glassmorphism Design System
   Pure Native CSS - Ultra Fast Loading - Zero Heavy External Dependencies
   ========================================================================== */

/* ----------------- CSS Custom Properties (Theme System) ----------------- */
:root {
  /* Light Theme (Crystalline Aurora Palette) */
  --bg-page: #f8faff;
  --bg-surface: rgba(255, 255, 255, 0.78);
  --bg-surface-elevated: rgba(255, 255, 255, 0.92);
  --bg-surface-soft: rgba(241, 245, 253, 0.75);
  --bg-header: rgba(255, 255, 255, 0.82);
  --bg-island-nav: rgba(255, 255, 255, 0.85);

  --text-main: #0a0f1d;
  --text-muted: #475569;
  --text-subtle: #64748b;
  --text-inverse: #ffffff;

  --border-light: rgba(226, 232, 240, 0.85);
  --border-glass: rgba(255, 255, 255, 0.6);
  --border-active: #00e0a4;

  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: rgba(37, 99, 235, 0.08);

  /* Aurora Accent Palette */
  --aurora-teal: #00d69f;
  --aurora-violet: #7c3aed;
  --aurora-magenta: #c026d3;
  --aurora-cyan: #0284c7;

  --current-continent-accent: #00d69f;
  --continent-glow: rgba(0, 214, 159, 0.18);

  --gradient-brand: linear-gradient(135deg, #2563eb 0%, #00d69f 100%);
  --gradient-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.85) 0%, rgba(255, 255, 255, 0.5) 100%);

  --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 16px 36px rgba(15, 23, 42, 0.08);
  --shadow-xl: 0 24px 48px rgba(15, 23, 42, 0.12);

  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-full: 9999px;

  --transition-fast: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Dark Theme (Deep Twilight Aurora Borealis) */
[data-theme="dark"] {
  --bg-page: #080812;
  --bg-surface: rgba(16, 18, 34, 0.72);
  --bg-surface-elevated: rgba(22, 26, 48, 0.85);
  --bg-surface-soft: rgba(22, 26, 46, 0.55);
  --bg-header: rgba(8, 8, 18, 0.82);
  --bg-island-nav: rgba(12, 14, 28, 0.8);

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-subtle: #64748b;
  --text-inverse: #080812;

  --border-light: rgba(255, 255, 255, 0.08);
  --border-glass: rgba(255, 255, 255, 0.14);
  --border-active: #00FFC2;

  --primary: #3b82f6;
  --primary-hover: #60a5fa;
  --primary-light: rgba(59, 130, 246, 0.15);

  /* Aurora Accent Palette (Dark Mode Vibrance) */
  --aurora-teal: #00FFC2;
  --aurora-violet: #8b5cf6;
  --aurora-magenta: #d946ef;
  --aurora-cyan: #38bdf8;

  --current-continent-accent: #00FFC2;
  --continent-glow: rgba(0, 255, 194, 0.25);

  --gradient-brand: linear-gradient(135deg, #3b82f6 0%, #00FFC2 100%);
  --gradient-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.09) 0%, rgba(255, 255, 255, 0.02) 100%);

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.5);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.6);
  --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.7);
  --shadow-xl: 0 28px 60px rgba(0, 0, 0, 0.85);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-page);
  color: var(--text-main);
  line-height: 1.6;
  transition: background-color var(--transition-smooth), color var(--transition-normal);
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Dynamic Ambient Aurora Background Undulation */
.ambient-aurora-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
  opacity: 0.85;
  transition: opacity var(--transition-smooth);
}

.aurora-mesh {
  position: absolute;
  filter: blur(90px);
  border-radius: 50%;
  animation: aurora-undulate 18s ease-in-out infinite alternate;
  will-change: transform, opacity;
}

.aurora-layer-1 {
  width: 750px;
  height: 550px;
  top: -150px;
  left: 20%;
  background: radial-gradient(circle, var(--aurora-violet) 0%, transparent 70%);
  opacity: 0.35;
}

.aurora-layer-2 {
  width: 650px;
  height: 500px;
  top: 50px;
  right: 10%;
  background: radial-gradient(circle, var(--current-continent-accent) 0%, transparent 70%);
  opacity: 0.32;
  animation-duration: 22s;
  animation-delay: -5s;
  transition: background var(--transition-smooth);
}

.aurora-layer-3 {
  width: 800px;
  height: 600px;
  bottom: 10%;
  left: 5%;
  background: radial-gradient(circle, var(--aurora-magenta) 0%, transparent 70%);
  opacity: 0.22;
  animation-duration: 26s;
  animation-delay: -10s;
}

@keyframes aurora-undulate {
  0% {
    transform: translate(0, 0) scale(1) rotate(0deg);
  }
  50% {
    transform: translate(40px, 30px) scale(1.1) rotate(15deg);
  }
  100% {
    transform: translate(-30px, 50px) scale(0.95) rotate(-10deg);
  }
}

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

img, svg {
  vertical-align: middle;
}

/* ----------------- Layout Container ----------------- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

.section {
  padding: 104px 0;
  position: relative;
  z-index: 1;
}

.section-alt {
  background: var(--bg-surface-soft);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

/* Section Header */
.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 60px auto;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: var(--current-continent-accent);
  background: rgba(0, 255, 194, 0.08);
  border-radius: var(--radius-full);
  margin-bottom: 16px;
  border: 1px solid rgba(0, 255, 194, 0.25);
  backdrop-filter: blur(8px);
}

.section-tag .pulse-dot {
  width: 7px;
  height: 7px;
  background-color: var(--current-continent-accent);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--current-continent-accent);
  animation: pulse-live 2s infinite;
}

@keyframes pulse-live {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 255, 194, 0.6); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(0, 255, 194, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 255, 194, 0); }
}

.section-title {
  font-size: 2.35rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.25;
  margin-bottom: 18px;
  letter-spacing: -0.025em;
}

.section-desc {
  font-size: 1.08rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ----------------- Floating Island Top Navbar ----------------- */
.island-nav-wrapper {
  position: sticky;
  top: 18px;
  z-index: 1000;
  width: 100%;
  padding: 0 20px;
  display: flex;
  justify-content: center;
}

.island-navbar {
  width: 100%;
  max-width: 1140px;
  height: 66px;
  background: var(--bg-island-nav);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px 0 24px;
  transition: all var(--transition-normal);
}

.island-navbar:hover {
  border-color: rgba(255, 255, 255, 0.25);
  box-shadow: var(--shadow-lg);
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.03em;
}

.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--gradient-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(0, 224, 164, 0.3);
}

.brand-text span {
  color: var(--aurora-teal);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  list-style: none;
}

.nav-links a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: 8px 12px;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-main);
  background: var(--primary-light);
}

/* 推荐资讯 Highlight Tag in Nav */
.nav-link-badge {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--current-continent-accent) !important;
  font-weight: 600 !important;
}

.nav-link-badge::after {
  content: "NEW";
  font-size: 0.65rem;
  font-weight: 800;
  background: var(--gradient-brand);
  color: #ffffff;
  padding: 1px 6px;
  border-radius: var(--radius-full);
  line-height: 1.2;
}

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

/* ----------------- Refined Theme Toggle Button ----------------- */
.theme-toggle-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border-glass);
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-main);
  transition: all var(--transition-fast);
  outline: none;
}

.theme-toggle-btn:hover {
  border-color: var(--aurora-teal);
  background: rgba(0, 255, 194, 0.12);
  color: var(--aurora-teal);
  transform: scale(1.06);
}

.theme-toggle-btn svg {
  width: 19px;
  height: 19px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.icon-sun { display: block; }
.icon-moon { display: none; }

[data-theme="dark"] .icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: block; }

/* ----------------- Buttons & CTA Components ----------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.94rem;
  font-weight: 600;
  padding: 11px 22px;
  border-radius: var(--radius-full);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  text-align: center;
  white-space: nowrap;
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.86rem;
}

.btn-lg {
  padding: 15px 32px;
  font-size: 1.05rem;
  font-weight: 700;
  box-shadow: 0 4px 18px rgba(0, 224, 164, 0.28);
}

.btn-primary {
  background: var(--gradient-brand);
  color: #ffffff;
}

.btn-primary:hover {
  filter: brightness(1.1);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 224, 164, 0.4);
  color: #ffffff;
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: var(--bg-surface);
  color: var(--text-main);
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.btn-secondary:hover {
  border-color: var(--aurora-teal);
  color: var(--aurora-teal);
  background: rgba(0, 255, 194, 0.08);
}

.btn-block {
  width: 100%;
}

/* ----------------- Hero Section with Blurred Glass Backdrop ----------------- */
.hero-section {
  padding: 60px 0 80px 0;
  text-align: center;
  position: relative;
}

.hero-glass-container {
  max-width: 1020px;
  margin: 0 auto;
  background: var(--gradient-glass);
  border: 1px solid var(--border-glass);
  border-radius: 32px;
  padding: 56px 40px 48px 40px;
  backdrop-filter: blur(28px);
  -webkit-backdrop-filter: blur(28px);
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.hero-glass-container::before {
  content: "";
  position: absolute;
  top: 0;
  left: 20%;
  right: 20%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.8), transparent);
}

/* Brand Name in Main Headline */
.hero-title {
  font-size: 3.35rem;
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.035em;
  color: var(--text-main);
  margin-bottom: 18px;
}

.hero-title .brand-gradient {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--aurora-teal);
  margin-bottom: 16px;
  letter-spacing: 0.2px;
}

.hero-intro {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 760px;
  margin: 0 auto 34px auto;
  line-height: 1.7;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

/* Interactive Latency Continent Selector */
.continent-selector-box {
  margin-top: 36px;
  padding-top: 32px;
  border-top: 1px solid var(--border-light);
}

.continent-label {
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-subtle);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

.continent-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.continent-btn {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-full);
  padding: 8px 18px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all var(--transition-fast);
  outline: none;
}

.continent-btn:hover {
  border-color: var(--current-continent-accent);
  color: var(--text-main);
  transform: translateY(-2px);
}

.continent-btn.active {
  background: var(--continent-glow);
  border-color: var(--current-continent-accent);
  color: var(--text-main);
  box-shadow: 0 0 16px var(--continent-glow);
}

.ping-tag {
  font-size: 0.78rem;
  padding: 2px 7px;
  border-radius: var(--radius-full);
  background: rgba(0, 0, 0, 0.15);
  color: var(--current-continent-accent);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

[data-theme="dark"] .ping-tag {
  background: rgba(255, 255, 255, 0.1);
}

/* ----------------- 3D Stacked Card Deck for Client Apps ----------------- */
.apps-showcase-section {
  padding: 40px 0 90px 0;
  perspective: 1000px;
}

.apps-deck-container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 1100px;
  margin: 0 auto;
}

.app-deck-card {
  background: var(--gradient-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 28px 22px;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-smooth);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  overflow: hidden;
  will-change: transform;
}

.app-deck-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-brand);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.app-deck-card:hover {
  transform: translateY(-8px) rotateX(4deg);
  border-color: var(--current-continent-accent);
  box-shadow: 0 16px 32px var(--continent-glow);
}

.app-deck-card:hover::after {
  opacity: 1;
}

.app-os-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--primary-light);
  color: var(--current-continent-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  border: 1px solid var(--border-light);
}

.app-os-icon svg {
  width: 26px;
  height: 26px;
}

.app-deck-card h3,
.app-deck-card h4 {
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
}

.app-deck-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 16px;
}

.client-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--current-continent-accent);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: rgba(0, 255, 194, 0.08);
}

/* ----------------- Core Advantages (3 Frosted Cards) ----------------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--gradient-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 38px 30px;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  position: relative;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--current-continent-accent);
  box-shadow: 0 18px 40px var(--continent-glow);
}

.feature-icon-wrapper {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  background: var(--primary-light);
  color: var(--current-continent-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  border: 1px solid var(--border-light);
}

.feature-icon-wrapper svg {
  width: 28px;
  height: 28px;
}

.feature-card h3 {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-main);
}

.feature-card p {
  font-size: 0.98rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 22px;
  flex-grow: 1;
}

.feature-list {
  list-style: none;
  border-top: 1px solid var(--border-light);
  padding-top: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.feature-list li {
  font-size: 0.88rem;
  color: var(--text-subtle);
  display: flex;
  align-items: center;
  gap: 8px;
}

.feature-list li svg {
  width: 15px;
  height: 15px;
  color: var(--current-continent-accent);
  flex-shrink: 0;
}

/* ----------------- Streaming & AI Showcase Cards ----------------- */
.showcase-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.showcase-card {
  background: var(--gradient-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 42px 36px;
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.showcase-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, var(--current-continent-accent) 0%, transparent 70%);
  opacity: 0.12;
  filter: blur(40px);
  border-radius: 50%;
  pointer-events: none;
}

.showcase-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.84rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--current-continent-accent);
  margin-bottom: 16px;
}

.showcase-card h3 {
  font-size: 1.75rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-main);
}

.showcase-card p {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.65;
  margin-bottom: 28px;
}

.media-logo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 26px;
}

.media-tag {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
  transition: all var(--transition-fast);
}

.media-tag:hover {
  border-color: var(--current-continent-accent);
  background: var(--continent-glow);
  transform: translateY(-2px);
}

.media-tag svg {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}

.showcase-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-light);
  padding-top: 18px;
  font-size: 0.88rem;
  color: var(--text-subtle);
}

.showcase-meta span {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--current-continent-accent);
  font-weight: 600;
}

/* ----------------- Pricing Plans (Real-world Accelerator Prices) ----------------- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  background: var(--gradient-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 40px 30px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-normal);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-sm);
}

.pricing-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
}

.pricing-card.popular {
  border: 2px solid var(--current-continent-accent);
  box-shadow: 0 16px 36px var(--continent-glow);
  transform: scale(1.03);
}

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

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-brand);
  color: #ffffff;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 18px;
  border-radius: var(--radius-full);
  letter-spacing: 0.5px;
  box-shadow: 0 4px 14px rgba(0, 224, 164, 0.35);
}

.pricing-header {
  text-align: center;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 24px;
}

.plan-name {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-main);
}

.plan-desc {
  font-size: 0.88rem;
  color: var(--text-subtle);
  margin-bottom: 18px;
}

.plan-price {
  font-size: 2.85rem;
  font-weight: 900;
  color: var(--text-main);
  line-height: 1;
}

.plan-price .currency {
  font-size: 1.35rem;
  font-weight: 700;
  vertical-align: top;
  margin-right: 2px;
}

.plan-price .period {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-subtle);
}

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

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

.pricing-features li svg {
  width: 18px;
  height: 18px;
  color: var(--current-continent-accent);
  flex-shrink: 0;
}

.pricing-features li.disabled {
  color: var(--text-subtle);
  opacity: 0.5;
  text-decoration: line-through;
}

.pricing-features li.disabled svg {
  color: var(--text-subtle);
}

/* ----------------- User Reviews (Testimonials) ----------------- */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.testimonial-card {
  background: var(--gradient-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 34px 28px;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform var(--transition-fast);
}

.testimonial-card:hover {
  transform: translateY(-4px);
  border-color: var(--current-continent-accent);
}

.stars-row {
  display: flex;
  gap: 4px;
  color: #f59e0b;
  margin-bottom: 16px;
}

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

.review-text {
  font-size: 0.96rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 24px;
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 14px;
  border-top: 1px solid var(--border-light);
  padding-top: 18px;
}

.user-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-brand);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.05rem;
  flex-shrink: 0;
}

.user-info h3,
.user-info h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
}

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

/* ----------------- FAQ (Frequently Asked Questions) ----------------- */
.faq-container {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--gradient-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  overflow: hidden;
  transition: all var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--current-continent-accent);
}

.faq-question {
  width: 100%;
  padding: 22px 26px;
  background: none;
  border: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
  text-align: left;
  cursor: pointer;
  outline: none;
}

.faq-icon {
  width: 20px;
  height: 20px;
  color: var(--text-subtle);
  transition: transform var(--transition-fast);
  flex-shrink: 0;
  margin-left: 12px;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  color: var(--current-continent-accent);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease-out, padding 0.35s ease-out;
  padding: 0 26px;
  color: var(--text-muted);
  font-size: 0.96rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 320px;
  padding: 0 26px 24px 26px;
}

/* ----------------- Footer (Strictly Exact 4 Links) ----------------- */
.site-footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-glass);
  padding: 50px 0;
  margin-top: auto;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 26px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-main);
}

.footer-links-grid {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  list-style: none;
  flex-wrap: wrap;
}

.footer-links-grid a {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.footer-links-grid a:hover {
  color: var(--current-continent-accent);
  background: var(--continent-glow);
}

.footer-copyright {
  font-size: 0.88rem;
  color: var(--text-subtle);
}

/* ----------------- Sub-Page Styles (About, Terms, Privacy, Sitemap, News) ----------------- */
.page-header {
  padding: 80px 0 50px 0;
  text-align: center;
  position: relative;
}

.page-title {
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 14px;
}

.page-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto;
}

.content-wrapper {
  max-width: 900px;
  margin: 40px auto 80px auto;
  background: var(--gradient-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 48px;
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  box-shadow: var(--shadow-md);
}

.content-wrapper h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 36px 0 16px 0;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 10px;
}

.content-wrapper h2:first-of-type {
  margin-top: 0;
}

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

.content-wrapper ul, .content-wrapper ol {
  padding-left: 24px;
  margin-bottom: 24px;
}

.info-box {
  background: var(--continent-glow);
  border-left: 4px solid var(--current-continent-accent);
  padding: 20px 24px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 26px 0;
  font-size: 0.96rem;
  color: var(--text-main);
}

.info-box strong {
  color: var(--current-continent-accent);
}

/* Blog / Insights Feed Grid */
.insights-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  margin-top: 24px;
}

.insight-article-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 30px;
  transition: all var(--transition-normal);
}

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

.insight-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.84rem;
  color: var(--text-subtle);
  margin-bottom: 12px;
}

.insight-meta .badge {
  background: var(--continent-glow);
  color: var(--current-continent-accent);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-weight: 700;
}

.insight-article-card h3 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
}

.insight-article-card p {
  font-size: 0.98rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 18px;
}

/* ----------------- Mobile Responsive (@media) ----------------- */
@media (max-width: 992px) {
  .hero-title {
    font-size: 2.7rem;
  }

  .features-grid,
  .pricing-grid,
  .testimonials-grid,
  .apps-deck-container {
    grid-template-columns: 1fr;
  }

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

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

  .showcase-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .island-nav-wrapper {
    padding: 0 12px;
    top: 10px;
  }

  .island-navbar {
    height: 58px;
    padding: 0 14px;
  }

  .nav-links {
    display: none;
  }

  .hero-glass-container {
    padding: 36px 20px;
    border-radius: 24px;
  }

  .hero-title {
    font-size: 2.15rem;
    line-height: 1.25;
  }

  .hero-subtitle {
    font-size: 1.08rem;
  }

  .hero-intro {
    font-size: 0.96rem;
  }

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

  .hero-cta-group .btn {
    width: 100%;
    min-height: 50px;
  }

  .continent-buttons {
    gap: 8px;
  }

  .continent-btn {
    padding: 6px 14px;
    font-size: 0.82rem;
  }

  .section-title {
    font-size: 1.85rem;
  }

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

  .showcase-card {
    padding: 28px 20px;
  }

  .content-wrapper {
    padding: 28px 20px;
    margin: 20px auto 50px auto;
  }

  .footer-links-grid {
    flex-direction: column;
    gap: 16px;
  }
}

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

/* ----------------- Long-form SEO Article Typography & Components ----------------- */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.86rem;
  color: var(--text-subtle);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.breadcrumbs a {
  color: var(--text-muted);
}

.breadcrumbs a:hover {
  color: var(--current-continent-accent);
}

.breadcrumbs span.separator {
  opacity: 0.4;
}

.article-header {
  margin-bottom: 36px;
  text-align: left;
}

.article-title {
  font-size: 2.35rem;
  font-weight: 800;
  line-height: 1.3;
  color: var(--text-main);
  margin-bottom: 16px;
  letter-spacing: -0.025em;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 0.88rem;
  color: var(--text-subtle);
  flex-wrap: wrap;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-light);
}

.article-meta-bar span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* Table of Contents (TOC) */
.article-toc {
  background: var(--bg-surface-soft);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin: 32px 0 40px 0;
  backdrop-filter: blur(12px);
}

.toc-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.toc-list {
  list-style: none;
  padding-left: 4px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toc-list li a {
  color: var(--text-muted);
  font-size: 0.95rem;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.toc-list li a:hover {
  color: var(--current-continent-accent);
  padding-left: 4px;
}

.toc-list li a span.num {
  font-family: ui-monospace, monospace;
  font-size: 0.85rem;
  color: var(--current-continent-accent);
  font-weight: 700;
}

/* Comparison and Specs Table */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: 28px 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
}

.tech-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.94rem;
}

.tech-table th {
  background: var(--bg-surface-soft);
  color: var(--text-main);
  font-weight: 700;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-light);
  white-space: nowrap;
}

.tech-table td {
  padding: 14px 18px;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-light);
}

.tech-table tr:last-child td {
  border-bottom: none;
}

.tech-table tr:hover td {
  background: rgba(0, 255, 194, 0.04);
}

/* Inline Code / Config Snippets */
.code-block {
  background: #0d1117;
  color: #e6edf3;
  padding: 18px 22px;
  border-radius: var(--radius-md);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.88rem;
  line-height: 1.6;
  overflow-x: auto;
  margin: 24px 0;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Related Reading Grid */
.related-reading-box {
  margin-top: 56px;
  padding-top: 36px;
  border-top: 1px solid var(--border-light);
}

.related-reading-box h3 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 22px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.related-card {
  background: var(--bg-surface-soft);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.related-card:hover {
  border-color: var(--current-continent-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.related-card h4 {
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
  line-height: 1.45;
}

.related-card p {
  font-size: 0.85rem;
  color: var(--text-subtle);
  line-height: 1.5;
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-card .read-link {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--current-continent-accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

@media (max-width: 768px) {
  .related-grid {
    grid-template-columns: 1fr;
  }
  .article-title {
    font-size: 1.85rem;
  }
}