/* ==========================================================================
   IKUUU - Global Core Stylesheet
   Y2K Cyber Millennium Edition (千禧极客与银河全息美学)
   Pure System Font Stack - Zero External Fonts, Ultra-Fast, Accessible
   ========================================================================== */

:root {
  --font-system: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  
  /* Y2K Millennium Cyber Palette */
  --color-bg-base: #07090e;
  --color-bg-surface: #0f131f;
  --color-bg-card: rgba(18, 24, 38, 0.75);
  --color-bg-card-hover: rgba(26, 34, 54, 0.9);
  --color-bg-alt: #141b2d;
  
  /* Cyber Neon & Holographic Chrome Accents */
  --color-neon-cyan: #00f0ff;
  --color-neon-violet: #d946ef;
  --color-neon-purple: #8b5cf6;
  --color-neon-green: #00ff66;
  --color-neon-amber: #fbbf24;
  --color-chrome: #e2e8f0;
  
  --color-text-main: #f8fafc;
  --color-text-muted: #94a3b8;
  --color-text-light: #64748b;
  --color-text-dim: #475569;
  
  /* Holographic Borders & Glass */
  --color-border: rgba(0, 240, 255, 0.22);
  --color-border-glow: rgba(0, 240, 255, 0.55);
  --color-border-purple: rgba(217, 70, 239, 0.35);
  --color-border-subtle: rgba(255, 255, 255, 0.08);
  
  /* Y2K Gradients */
  --grad-holo: linear-gradient(135deg, #00f0ff 0%, #3b82f6 40%, #d946ef 100%);
  --grad-holo-silver: linear-gradient(135deg, #ffffff 0%, #cbd5e1 50%, #94a3b8 100%);
  --grad-card-top: linear-gradient(90deg, #00f0ff, #8b5cf6, #d946ef);
  --grad-dark-mesh: radial-gradient(circle at 50% 0%, rgba(0, 240, 255, 0.14) 0%, transparent 60%),
                    radial-gradient(circle at 100% 40%, rgba(217, 70, 239, 0.1) 0%, transparent 50%),
                    radial-gradient(circle at 0% 80%, rgba(59, 130, 246, 0.08) 0%, transparent 50%);

  --max-width: 1160px;
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  
  --shadow-neon-cyan: 0 0 20px rgba(0, 240, 255, 0.28), 0 0 4px rgba(0, 240, 255, 0.5);
  --shadow-neon-violet: 0 0 22px rgba(217, 70, 239, 0.3), 0 0 4px rgba(217, 70, 239, 0.5);
  --shadow-card: 0 8px 32px 0 rgba(0, 0, 0, 0.45);
}

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

html {
  font-family: var(--font-system);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text-main);
  background-color: var(--color-bg-base);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--color-bg-base);
  background-image: 
    var(--grad-dark-mesh),
    linear-gradient(rgba(0, 240, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 240, 255, 0.035) 1px, transparent 1px);
  background-size: 100% 100%, 36px 36px, 36px 36px;
}

/* Accessibility Focus & Reduced Motion */
:focus-visible {
  outline: 2px solid var(--color-neon-cyan);
  outline-offset: 3px;
  box-shadow: 0 0 10px var(--color-neon-cyan);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

a {
  color: var(--color-neon-cyan);
  text-decoration: none;
  transition: all 0.2s ease;
}

a:hover {
  color: #67e8f9;
  text-shadow: 0 0 8px rgba(0, 240, 255, 0.6);
}

img, svg {
  max-width: 100%;
  height: auto;
  display: block;
}

.site-container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* ==========================================================================
   Y2K Header & Cyber Navigation
   ========================================================================== */
.site-header {
  background-color: rgba(9, 13, 22, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.site-header::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--grad-card-top);
  opacity: 0.7;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.45rem;
  font-weight: 900;
  color: #ffffff;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  min-height: 44px;
}

.brand-logo .logo-sparkle {
  color: var(--color-neon-cyan);
  font-size: 1.2rem;
  text-shadow: 0 0 10px var(--color-neon-cyan);
}

.brand-logo .logo-badge {
  background: var(--grad-holo);
  color: #050811;
  padding: 2px 8px;
  border-radius: var(--radius-xs);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  box-shadow: 0 0 12px rgba(0, 240, 255, 0.5);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-text-muted);
  padding: 10px 6px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  position: relative;
  letter-spacing: 0.02em;
}

.nav-link::before {
  content: "✦";
  font-size: 0.7rem;
  margin-right: 6px;
  color: var(--color-neon-cyan);
  opacity: 0;
  transform: scale(0.5);
  transition: all 0.2s ease;
}

.nav-link:hover, .nav-link.active {
  color: #ffffff;
  text-shadow: 0 0 10px rgba(0, 240, 255, 0.7);
}

.nav-link:hover::before, .nav-link.active::before {
  opacity: 1;
  transform: scale(1);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--grad-holo);
  color: #07090e;
  font-weight: 900;
  font-size: 0.94rem;
  padding: 10px 22px;
  min-height: 44px;
  border-radius: 9999px;
  border: 1px solid rgba(255, 255, 255, 0.4);
  box-shadow: var(--shadow-neon-cyan);
  transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
  letter-spacing: 0.03em;
}

.nav-cta:hover {
  color: #07090e;
  transform: scale(1.04) translateY(-1px);
  box-shadow: 0 0 28px rgba(0, 240, 255, 0.75), 0 0 8px #ffffff;
}

/* Mobile Nav Toggle */
.mobile-menu-toggle {
  display: none;
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xs);
  padding: 8px 12px;
  min-height: 44px;
  min-width: 44px;
  cursor: pointer;
  color: var(--color-neon-cyan);
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
}

@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
  .main-nav {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background-color: rgba(9, 13, 24, 0.97);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: 18px 20px 24px;
    gap: 8px;
    box-shadow: var(--shadow-card);
  }
  .main-nav.active {
    display: flex;
  }
  .nav-link {
    width: 100%;
    border-bottom: 1px solid var(--color-border-subtle);
  }
  .nav-cta {
    width: 100%;
    margin-top: 10px;
  }
}

/* ==========================================================================
   Y2K Hero Section & Cyber Status Ticker
   ========================================================================== */
.hero-section {
  position: relative;
  padding: 68px 0 64px;
  text-align: center;
  overflow: hidden;
  border-bottom: 1px solid var(--color-border-subtle);
}

.hero-content {
  max-width: 860px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

/* Y2K Cyber Pill */
.y2k-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(0, 240, 255, 0.06);
  border: 1px solid var(--color-border);
  box-shadow: inset 0 0 12px rgba(0, 240, 255, 0.15), 0 0 14px rgba(0, 240, 255, 0.15);
  padding: 6px 18px;
  border-radius: 9999px;
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--color-neon-cyan);
  margin-bottom: 26px;
  letter-spacing: 0.05em;
}

.pulse-led {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background-color: var(--color-neon-green);
  box-shadow: 0 0 8px var(--color-neon-green);
  position: relative;
}

.pulse-led::after {
  content: "";
  position: absolute;
  top: -5px;
  left: -5px;
  width: 19px;
  height: 19px;
  border-radius: 50%;
  border: 1px solid var(--color-neon-green);
  animation: y2kPulse 2s infinite ease-out;
}

@keyframes y2kPulse {
  0% { transform: scale(0.6); opacity: 1; }
  100% { transform: scale(1.6); opacity: 0; }
}

.hero-title {
  font-size: 2.5rem;
  line-height: 1.25;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: #ffffff;
  margin-bottom: 20px;
  text-shadow: 0 0 30px rgba(0, 240, 255, 0.25);
}

@media (min-width: 768px) {
  .hero-title {
    font-size: 3.25rem;
  }
}

.hero-title .glow-cyan {
  color: var(--color-neon-cyan);
  text-shadow: 0 0 16px rgba(0, 240, 255, 0.6);
}

.hero-subtitle {
  font-size: 1.18rem;
  line-height: 1.7;
  color: var(--color-text-muted);
  max-width: 700px;
  margin: 0 auto 38px;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 38px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--grad-holo);
  color: #07090e;
  font-weight: 900;
  font-size: 1.1rem;
  padding: 15px 36px;
  min-height: 54px;
  border-radius: 9999px;
  border: 1px solid rgba(255, 255, 255, 0.5);
  box-shadow: 0 0 24px rgba(0, 240, 255, 0.45);
  transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
  cursor: pointer;
  letter-spacing: 0.04em;
}

.btn-primary:hover {
  color: #07090e;
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 0 34px rgba(0, 240, 255, 0.75), 0 0 12px #ffffff;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(255, 255, 255, 0.05);
  color: #ffffff;
  font-weight: 700;
  font-size: 1.05rem;
  padding: 15px 30px;
  min-height: 54px;
  border-radius: 9999px;
  border: 1px solid var(--color-border);
  box-shadow: inset 0 0 10px rgba(0, 240, 255, 0.1);
  transition: all 0.2s ease;
}

.btn-secondary:hover {
  background-color: rgba(0, 240, 255, 0.12);
  border-color: var(--color-neon-cyan);
  color: var(--color-neon-cyan);
  transform: translateY(-2px);
  box-shadow: 0 0 18px rgba(0, 240, 255, 0.3);
}

.hero-trust-indicators {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  flex-wrap: wrap;
  font-size: 0.94rem;
  font-weight: 600;
  color: var(--color-text-muted);
  padding-top: 8px;
}

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

.trust-item svg {
  color: var(--color-neon-cyan);
  width: 18px;
  height: 18px;
  filter: drop-shadow(0 0 6px var(--color-neon-cyan));
}

/* Y2K Cyber Radar Dashboard (Grid of Live Node Statuses) */
.hero-radar-box {
  margin-top: 48px;
  background: var(--color-bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  box-shadow: var(--shadow-card), inset 0 1px 0 rgba(255, 255, 255, 0.1);
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  text-align: left;
  position: relative;
}

.hero-radar-box::before {
  content: "";
  position: absolute;
  top: 0;
  left: 20px;
  right: 20px;
  height: 2px;
  background: var(--grad-card-top);
  opacity: 0.9;
  border-radius: 9999px;
}

@media (min-width: 580px) {
  .hero-radar-box {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .hero-radar-box {
    grid-template-columns: repeat(4, 1fr);
  }
}

.radar-node {
  padding: 12px 14px;
  background: rgba(0, 240, 255, 0.04);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(0, 240, 255, 0.16);
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
}

.radar-node:hover {
  background: rgba(0, 240, 255, 0.08);
  border-color: var(--color-neon-cyan);
  box-shadow: 0 0 14px rgba(0, 240, 255, 0.25);
  transform: translateY(-1px);
}

.radar-node-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
  min-width: 0;
}

.radar-node-name {
  font-size: 0.85rem;
  font-weight: 700;
  color: #ffffff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  letter-spacing: 0.01em;
}

.radar-node-ping {
  font-size: 0.82rem;
  font-weight: 800;
  color: var(--color-neon-green);
  text-shadow: 0 0 6px var(--color-neon-green);
  white-space: nowrap;
  flex-shrink: 0;
  font-family: var(--font-mono);
}

.radar-node-status {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: 7px;
  min-width: 0;
}

.radar-node-status .status-dot {
  display: inline-block;
  flex-shrink: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--color-neon-green);
  box-shadow: 0 0 7px var(--color-neon-green);
}

.radar-node-status .status-text {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--color-text-muted);
}

/* ==========================================================================
   Section Layouts & General Components
   ========================================================================== */
.section-block {
  padding: 76px 0;
  position: relative;
}

.section-alt {
  background-color: rgba(13, 17, 28, 0.65);
  border-top: 1px solid var(--color-border-subtle);
  border-bottom: 1px solid var(--color-border-subtle);
}

.section-header {
  text-align: center;
  max-width: 740px;
  margin: 0 auto 52px;
}

.section-tag {
  display: inline-block;
  background: rgba(0, 240, 255, 0.08);
  color: var(--color-neon-cyan);
  border: 1px solid var(--color-border);
  font-size: 0.82rem;
  font-weight: 800;
  padding: 4px 14px;
  border-radius: 9999px;
  margin-bottom: 14px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.15);
}

.section-title {
  font-size: 2.15rem;
  font-weight: 900;
  color: #ffffff;
  margin-bottom: 14px;
  letter-spacing: -0.02em;
  text-shadow: 0 0 20px rgba(0, 240, 255, 0.18);
}

.section-desc {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* Grids */
.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.grid-4 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

@media (min-width: 768px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Feature & Benefit Cyber Cards */
.feature-card {
  background: var(--color-bg-card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 30px 26px;
  box-shadow: var(--shadow-card);
  transition: transform 0.24s ease, box-shadow 0.24s ease, border-color 0.24s ease;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--grad-card-top);
  opacity: 0.3;
  transition: opacity 0.24s ease;
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-border-glow);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.6), 0 0 24px rgba(0, 240, 255, 0.2);
}

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

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid var(--color-border);
  color: var(--color-neon-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  box-shadow: 0 0 14px rgba(0, 240, 255, 0.2);
}

.card-icon svg {
  width: 26px;
  height: 26px;
  filter: drop-shadow(0 0 4px var(--color-neon-cyan));
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 10px;
  color: #ffffff;
}

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

/* Service Matrix (Streaming & AI) */
.matrix-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

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

.matrix-box {
  background: var(--color-bg-card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  box-shadow: var(--shadow-card);
  transition: all 0.22s ease;
  position: relative;
}

.matrix-box:hover {
  border-color: var(--color-border-glow);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.6), 0 0 20px rgba(0, 240, 255, 0.18);
}

.matrix-box h3 {
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
  color: #ffffff;
}

.matrix-box h3 svg {
  color: var(--color-neon-cyan);
  filter: drop-shadow(0 0 6px var(--color-neon-cyan));
}

.matrix-desc {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin-bottom: 22px;
  line-height: 1.65;
}

.support-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.support-tag {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-border);
  color: #e2e8f0;
  padding: 8px 14px;
  border-radius: 9999px;
  font-size: 0.88rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  transition: all 0.18s ease;
}

.support-tag:hover {
  background: rgba(0, 240, 255, 0.12);
  border-color: var(--color-neon-cyan);
  color: var(--color-neon-cyan);
  box-shadow: 0 0 12px rgba(0, 240, 255, 0.3);
}

.support-tag svg {
  width: 14px;
  height: 14px;
  color: var(--color-neon-cyan);
}

/* Usage Scenarios (Target Audience Cards) */
.scenario-card {
  background: var(--color-bg-card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 34px 28px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-card);
  transition: transform 0.24s ease, box-shadow 0.24s ease;
}

.scenario-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-border-glow);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.6), 0 0 22px rgba(0, 240, 255, 0.2);
}

.scenario-badge {
  display: inline-block;
  align-self: flex-start;
  background: rgba(217, 70, 239, 0.1);
  color: #f472b6;
  border: 1px solid rgba(217, 70, 239, 0.35);
  font-size: 0.82rem;
  font-weight: 800;
  padding: 4px 14px;
  border-radius: 9999px;
  margin-bottom: 18px;
  box-shadow: 0 0 10px rgba(217, 70, 239, 0.2);
}

.scenario-title {
  font-size: 1.35rem;
  font-weight: 900;
  margin-bottom: 8px;
  color: #ffffff;
}

.scenario-device {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-text-light);
  margin-bottom: 16px;
  padding-bottom: 14px;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.12);
}

.scenario-desc {
  font-size: 0.96rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ==========================================================================
   Y2K Pricing Section (Holographic Cyber Polish)
   ========================================================================== */
.billing-switcher-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 40px;
}

.billing-switcher {
  display: inline-flex;
  background-color: rgba(18, 24, 38, 0.9);
  padding: 5px;
  border-radius: 9999px;
  border: 1px solid var(--color-border);
  box-shadow: 0 0 16px rgba(0, 240, 255, 0.12);
}

.billing-btn {
  background: none;
  border: none;
  font-family: inherit;
  font-size: 0.92rem;
  font-weight: 800;
  color: var(--color-text-muted);
  padding: 9px 20px;
  min-height: 42px;
  border-radius: 9999px;
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
}

.billing-btn.active {
  background: var(--grad-holo);
  color: #07090e;
  box-shadow: 0 0 16px rgba(0, 240, 255, 0.45);
}

.billing-discount-badge {
  background: #00ff66;
  color: #07090e;
  font-size: 0.74rem;
  font-weight: 900;
  padding: 2px 8px;
  border-radius: 9999px;
  margin-left: 6px;
  box-shadow: 0 0 8px #00ff66;
}

.pricing-card {
  background: var(--color-bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 38px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: var(--shadow-card);
  transition: transform 0.24s ease, box-shadow 0.24s ease;
}

.pricing-card.featured {
  border: 2px solid var(--color-neon-cyan);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.7), 0 0 28px rgba(0, 240, 255, 0.3);
  background: linear-gradient(180deg, rgba(18, 28, 48, 0.85) 0%, rgba(15, 20, 34, 0.95) 100%);
}

.pricing-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.75), 0 0 26px rgba(0, 240, 255, 0.25);
}

.pricing-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--grad-holo);
  color: #07090e;
  font-size: 0.78rem;
  font-weight: 900;
  padding: 4px 18px;
  border-radius: 9999px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  box-shadow: 0 0 16px rgba(0, 240, 255, 0.55);
}

.pricing-header {
  text-align: center;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: 24px;
}

.pricing-tier-name {
  font-size: 1.45rem;
  font-weight: 900;
  color: #ffffff;
  margin-bottom: 5px;
}

.pricing-tier-audience {
  font-size: 0.88rem;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

.pricing-price {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
}

.pricing-currency {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--color-neon-cyan);
  text-shadow: 0 0 8px var(--color-neon-cyan);
}

.pricing-amount {
  font-size: 3rem;
  font-weight: 900;
  line-height: 1;
  color: #ffffff;
  text-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
}

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

.pricing-features {
  list-style: none;
  margin-bottom: 34px;
  flex-grow: 1;
}

.pricing-features li {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  padding: 10px 0;
  display: flex;
  align-items: center;
  gap: 12px;
}

.pricing-features li svg {
  color: var(--color-neon-cyan);
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  filter: drop-shadow(0 0 4px var(--color-neon-cyan));
}

.pricing-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 14px 24px;
  min-height: 50px;
  border-radius: 9999px;
  font-weight: 900;
  font-size: 1rem;
  border: 1px solid var(--color-border);
  background: rgba(255, 255, 255, 0.05);
  color: #ffffff;
  transition: all 0.22s ease-in-out;
  letter-spacing: 0.03em;
}

.pricing-card.featured .pricing-cta {
  background: var(--grad-holo);
  border-color: transparent;
  color: #07090e;
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
}

.pricing-cta:hover {
  transform: translateY(-2px);
  background: var(--grad-holo);
  color: #07090e;
  box-shadow: 0 0 28px rgba(0, 240, 255, 0.65);
}

/* ==========================================================================
   Y2K FAQ Accordion
   ========================================================================== */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--color-bg-card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all 0.2s ease;
}

.faq-item:hover {
  border-color: var(--color-border-glow);
  box-shadow: 0 0 16px rgba(0, 240, 255, 0.15);
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 20px 24px;
  min-height: 56px;
  background: none;
  border: none;
  font-family: inherit;
  font-size: 1.1rem;
  font-weight: 800;
  color: #ffffff;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-question::after {
  content: "+";
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-neon-cyan);
  text-shadow: 0 0 8px var(--color-neon-cyan);
  transition: transform 0.2s ease;
}

.faq-item.open .faq-question::after {
  content: "−";
}

.faq-answer {
  display: none;
  padding: 0 24px 22px;
  font-size: 0.98rem;
  color: var(--color-text-muted);
  line-height: 1.75;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 18px;
}

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

/* ==========================================================================
   Y2K Final CTA Section
   ========================================================================== */
.final-cta-section {
  background: linear-gradient(180deg, #07090e 0%, #0d1326 50%, #150e28 100%);
  border-top: 1px solid var(--color-border);
  color: #ffffff;
  padding: 84px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.final-cta-section::before {
  content: "";
  position: absolute;
  top: -40%;
  left: 30%;
  width: 40%;
  height: 80%;
  background: radial-gradient(circle, rgba(0, 240, 255, 0.2) 0%, transparent 70%);
  pointer-events: none;
}

.final-cta-title {
  font-size: 2.5rem;
  font-weight: 900;
  margin-bottom: 16px;
  position: relative;
  z-index: 2;
  text-shadow: 0 0 30px rgba(0, 240, 255, 0.4);
}

.final-cta-desc {
  font-size: 1.15rem;
  color: #cbd5e1;
  max-width: 660px;
  margin: 0 auto 36px;
  line-height: 1.7;
  position: relative;
  z-index: 2;
}

.btn-cta-light {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--grad-holo);
  color: #07090e;
  font-weight: 900;
  font-size: 1.12rem;
  padding: 16px 42px;
  min-height: 56px;
  border-radius: 9999px;
  box-shadow: 0 0 30px rgba(0, 240, 255, 0.5), 0 0 10px #ffffff;
  transition: all 0.22s ease;
  position: relative;
  z-index: 2;
  letter-spacing: 0.04em;
}

.btn-cta-light:hover {
  transform: translateY(-2px) scale(1.04);
  box-shadow: 0 0 44px rgba(0, 240, 255, 0.8), 0 0 16px #ffffff;
}

/* ==========================================================================
   Mobile Sticky Bottom CTA Bar
   ========================================================================== */
.mobile-sticky-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(9, 13, 24, 0.95);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-top: 1px solid var(--color-border);
  padding: 12px 18px;
  z-index: 100;
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.7);
  align-items: center;
  justify-content: space-between;
  transform: translateY(100%);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

@media (max-width: 768px) {
  .mobile-sticky-bar {
    display: flex;
  }
  .mobile-sticky-bar.visible {
    transform: translateY(0);
  }
}

.mobile-sticky-bar .sticky-info {
  display: flex;
  flex-direction: column;
}

.mobile-sticky-bar .sticky-brand {
  font-size: 0.96rem;
  font-weight: 900;
  color: #ffffff;
}

.mobile-sticky-bar .sticky-tip {
  font-size: 0.76rem;
  color: var(--color-neon-cyan);
}

.mobile-sticky-bar .sticky-btn {
  background: var(--grad-holo);
  color: #07090e;
  font-weight: 900;
  font-size: 0.92rem;
  padding: 10px 22px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 9999px;
  box-shadow: 0 0 16px rgba(0, 240, 255, 0.4);
}

/* ==========================================================================
   Content & Article Pages (SEO)
   ========================================================================== */
.article-header {
  padding: 48px 0 28px;
  border-bottom: 1px solid var(--color-border-subtle);
  margin-bottom: 38px;
}

.breadcrumbs {
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin-bottom: 18px;
  display: flex;
  gap: 8px;
  align-items: center;
}

.article-title {
  font-size: 2.25rem;
  font-weight: 900;
  line-height: 1.3;
  color: #ffffff;
  margin-bottom: 18px;
  letter-spacing: -0.02em;
  text-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.92rem;
  color: var(--color-text-muted);
}

.article-content {
  max-width: 860px;
  margin: 0 auto;
  font-size: 1.05rem;
  line-height: 1.85;
  color: #cbd5e1;
}

.article-lead {
  font-size: 1.15rem;
  line-height: 1.75;
  color: #e2e8f0;
  background-color: rgba(0, 240, 255, 0.05);
  border-left: 4px solid var(--color-neon-cyan);
  box-shadow: inset 0 0 15px rgba(0, 240, 255, 0.08);
  padding: 20px 24px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 38px;
}

.article-content h2 {
  font-size: 1.65rem;
  font-weight: 900;
  color: #ffffff;
  margin-top: 48px;
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.article-content h3 {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--color-neon-cyan);
  margin-top: 32px;
  margin-bottom: 14px;
}

.article-content p {
  margin-bottom: 22px;
}

.article-content ul, .article-content ol {
  margin-bottom: 22px;
  padding-left: 22px;
}

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

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 34px 0;
  font-size: 0.96rem;
  background: var(--color-bg-card);
  box-shadow: var(--shadow-card);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.article-content th, .article-content td {
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 14px 16px;
  text-align: left;
}

.article-content th {
  background-color: rgba(0, 240, 255, 0.08);
  font-weight: 800;
  color: #ffffff;
}

.article-faq-box {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 30px;
  margin: 44px 0;
  box-shadow: var(--shadow-sm);
}

.article-faq-box h3 {
  margin-top: 0;
  margin-bottom: 18px;
  font-size: 1.3rem;
}

.article-cta-box {
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.08) 0%, rgba(217, 70, 239, 0.08) 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 38px 30px;
  text-align: center;
  margin: 50px 0;
  box-shadow: var(--shadow-card);
}

.article-cta-box h3 {
  font-size: 1.5rem;
  font-weight: 900;
  color: #ffffff;
  margin-bottom: 12px;
  margin-top: 0;
}

.article-cta-box p {
  font-size: 1.02rem;
  color: var(--color-text-muted);
  margin-bottom: 24px;
}

.article-interlinks {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px;
  margin-top: 48px;
}

.article-interlinks h4 {
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: #ffffff;
}

.article-interlinks ul {
  list-style: none;
  padding-left: 0;
  margin-bottom: 0;
}

.article-interlinks li {
  padding: 8px 0;
}

/* ==========================================================================
   Article Grid / Guides List Page
   ========================================================================== */
.guides-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  margin: 40px 0;
}

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

@media (min-width: 1024px) {
  .guides-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.guide-card {
  background: var(--color-bg-card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-card);
  transition: transform 0.24s ease, box-shadow 0.24s ease, border-color 0.24s ease;
}

.guide-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.6), 0 0 20px rgba(0, 240, 255, 0.2);
  border-color: var(--color-border-glow);
}

.guide-card-tag {
  display: inline-block;
  align-self: flex-start;
  background: rgba(0, 240, 255, 0.08);
  color: var(--color-neon-cyan);
  border: 1px solid var(--color-border);
  font-size: 0.8rem;
  font-weight: 800;
  padding: 4px 12px;
  border-radius: 9999px;
  margin-bottom: 16px;
  letter-spacing: 0.04em;
}

.guide-card-title {
  font-size: 1.25rem;
  font-weight: 800;
  line-height: 1.45;
  margin-bottom: 12px;
}

.guide-card-title a {
  color: #ffffff;
}

.guide-card-title a:hover {
  color: var(--color-neon-cyan);
}

.guide-card-desc {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: 22px;
  flex-grow: 1;
}

.guide-card-meta {
  font-size: 0.84rem;
  color: var(--color-text-light);
  display: flex;
  justify-content: space-between;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 14px;
}

/* ==========================================================================
   Static Pages
   ========================================================================== */
.static-page-wrapper {
  background: var(--color-bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 44px 38px;
  margin: 46px auto;
  max-width: 900px;
  box-shadow: var(--shadow-card);
}

.static-page-wrapper h1 {
  font-size: 2.2rem;
  font-weight: 900;
  margin-bottom: 16px;
  color: #ffffff;
}

.static-page-wrapper .page-meta {
  font-size: 0.92rem;
  color: var(--color-text-light);
  margin-bottom: 28px;
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.static-page-wrapper h2 {
  font-size: 1.45rem;
  font-weight: 800;
  margin-top: 38px;
  margin-bottom: 16px;
  color: var(--color-neon-cyan);
}

.static-page-wrapper p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text-muted);
  margin-bottom: 20px;
}

.static-page-wrapper ul {
  padding-left: 22px;
  margin-bottom: 22px;
  font-size: 1rem;
  color: var(--color-text-muted);
}

.static-page-wrapper li {
  margin-bottom: 10px;
}

/* Sitemap List */
.sitemap-group {
  margin-bottom: 34px;
}

.sitemap-group h2 {
  font-size: 1.35rem;
  border-bottom: 2px solid var(--color-border);
  padding-bottom: 10px;
  margin-bottom: 18px;
}

.sitemap-list {
  list-style: none;
  padding-left: 0;
}

.sitemap-list li {
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background-color: #05070d;
  border-top: 1px solid var(--color-border);
  padding: 58px 0 38px;
  margin-top: auto;
  font-size: 0.92rem;
  color: var(--color-text-muted);
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr;
  gap: 38px;
  padding-bottom: 38px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

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

.footer-col h4 {
  font-size: 1.1rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 18px;
}

.footer-col p {
  line-height: 1.7;
  color: var(--color-text-muted);
  font-size: 0.92rem;
}

.footer-links {
  list-style: none;
  padding: 0;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  color: var(--color-text-muted);
  display: inline-block;
  min-height: 24px;
}

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

.footer-disclosure {
  background-color: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  font-size: 0.88rem;
  color: var(--color-text-muted);
  margin-top: 20px;
  line-height: 1.6;
}

.footer-bottom {
  padding-top: 28px;
  text-align: center;
  font-size: 0.86rem;
  color: var(--color-text-light);
  line-height: 1.6;
}