/* ==========================================================================
   ACID HOLOGRAPHIC / LIQUID OPAL DESIGN SYSTEM (kittyjc.click)
   全息酸性流动 / 镭射晶体风
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@600;800;900&family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=Space+Grotesk:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;700&display=swap');

:root {
  /* Chromatic & Opal Palette */
  --bg-deep-space: #07090e;
  --bg-void: #030407;
  --opal-cyan: #00f2fe;
  --opal-purple: #9b51e0;
  --opal-magenta: #ff007a;
  --opal-lime: #00ff87;
  --opal-gold: #ffbe0b;
  --opal-electric-blue: #4facfe;

  /* Holographic Gradients */
  --hologram-rainbow: linear-gradient(
    135deg,
    #ff3366 0%,
    #ff9933 16%,
    #ffff33 33%,
    #33ff99 50%,
    #33ccff 66%,
    #9933ff 83%,
    #ff3399 100%
  );
  --hologram-conic: conic-gradient(
    from 180deg at 50% 50%,
    #00f2fe 0deg,
    #4facfe 45deg,
    #9b51e0 90deg,
    #ff007a 135deg,
    #ffbe0b 180deg,
    #00ff87 225deg,
    #00f2fe 360deg
  );
  --chrome-metallic: linear-gradient(
    180deg,
    #ffffff 0%,
    #f2f4f8 20%,
    #a6afc3 45%,
    #4a5568 50%,
    #8f9bb3 55%,
    #e2e8f0 80%,
    #ffffff 100%
  );
  --chrome-liquid-acid: linear-gradient(
    135deg,
    #ffffff 0%,
    #c4b5fd 25%,
    #67e8f9 50%,
    #f472b6 75%,
    #ffffff 100%
  );

  /* Glass & Refraction */
  --glass-bg: rgba(14, 18, 28, 0.58);
  --glass-bg-hover: rgba(22, 28, 44, 0.72);
  --glass-border: rgba(255, 255, 255, 0.16);
  --glass-border-glow: rgba(0, 242, 254, 0.4);
  --glass-blur: blur(24px) saturate(180%);
  --glass-shadow: 0 20px 50px rgba(0, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.25);

  /* Fonts */
  --font-display: 'Space Grotesk', -apple-system, sans-serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, sans-serif;
  --font-accent: 'Cinzel', serif;
  --font-mono: 'JetBrains Mono', monospace;

  --transition-fast: 0.2s cubic-bezier(0.2, 0.8, 0.2, 1);
  --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-spring: 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  font-family: var(--font-body);
  background-color: var(--bg-deep-space);
  color: #e2e8f0;
  scroll-behavior: smooth;
  scroll-padding-top: 100px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body {
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
  background-color: var(--bg-deep-space);
}

::selection {
  background: #ff007a;
  color: #ffffff;
}

/* WebGL Background Canvas */
#fluid-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
  opacity: 0.85;
}

/* Background Vignette & Ambient Hologram Grid */
.bg-ambient-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
  background: 
    radial-gradient(circle at 50% 0%, rgba(0, 242, 254, 0.12) 0%, transparent 60%),
    radial-gradient(circle at 100% 50%, rgba(155, 81, 224, 0.12) 0%, transparent 50%),
    radial-gradient(circle at 0% 100%, rgba(255, 0, 122, 0.1) 0%, transparent 50%),
    linear-gradient(180deg, rgba(7, 9, 14, 0.3) 0%, rgba(7, 9, 14, 0.85) 100%);
  background-blend-mode: screen, screen, screen, normal;
}

/* Acid Grid Lines Pattern */
.bg-grid-mesh {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
  opacity: 0.14;
  background-size: 60px 60px;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.1) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.1) 1px, transparent 1px);
  mask-image: radial-gradient(circle at 50% 40%, black 20%, transparent 80%);
}

/* Container */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 2;
}

/* ==========================================================================
   TOP TICKER & BANNER (最上方广告语和特色)
   ========================================================================== */
.top-ticker {
  position: relative;
  z-index: 101;
  background: rgba(8, 10, 16, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  overflow: hidden;
  padding: 8px 0;
  display: flex;
  align-items: center;
}

.top-ticker-track {
  display: flex;
  gap: 40px;
  white-space: nowrap;
  animation: tickerSlide 35s linear infinite;
  will-change: transform;
}

.top-ticker-item {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.84rem;
  font-family: var(--font-display);
  letter-spacing: 0.05em;
  color: #cbd5e1;
  text-transform: uppercase;
}

.top-ticker-item .spark {
  color: var(--opal-cyan);
  font-size: 1rem;
  animation: spinSpark 4s linear infinite;
}

.top-ticker-highlight {
  background: var(--hologram-rainbow);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 700;
}

@keyframes tickerSlide {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

@keyframes spinSpark {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* ==========================================================================
   NAVIGATION BAR (上方导航栏)
   ========================================================================== */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 16px 0;
  background: rgba(7, 9, 14, 0.65);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: all var(--transition-smooth);
}

.site-nav.scrolled {
  padding: 12px 0;
  background: rgba(5, 7, 12, 0.9);
  border-bottom: 1px solid rgba(0, 242, 254, 0.25);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.logo-crystal-gem {
  width: 38px;
  height: 38px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  filter: drop-shadow(0 0 12px rgba(0, 242, 254, 0.6));
}

.logo-crystal-gem svg {
  width: 100%;
  height: 100%;
  animation: pulseGem 4s ease-in-out infinite alternate;
}

@keyframes pulseGem {
  0% { filter: hue-rotate(0deg) drop-shadow(0 0 10px rgba(0, 242, 254, 0.8)); transform: scale(0.98); }
  100% { filter: hue-rotate(60deg) drop-shadow(0 0 18px rgba(255, 0, 122, 0.9)); transform: scale(1.05); }
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: var(--chrome-liquid-acid);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 20px rgba(255, 255, 255, 0.2);
}

.brand-badge {
  font-size: 0.62rem;
  font-family: var(--font-mono);
  color: var(--opal-lime);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-link {
  color: #94a3b8;
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  position: relative;
  padding: 6px 2px;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--hologram-rainbow);
  transition: width var(--transition-smooth);
}

.nav-link:hover, .nav-link.active {
  color: #ffffff;
}

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

.nav-link.highlight-kb {
  color: var(--opal-cyan);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid rgba(0, 242, 254, 0.25);
  border-radius: 20px;
  padding: 5px 14px;
  transition: all var(--transition-fast);
}

.nav-link.highlight-kb:hover {
  background: rgba(0, 242, 254, 0.2);
  border-color: var(--opal-cyan);
  box-shadow: 0 0 16px rgba(0, 242, 254, 0.4);
  transform: translateY(-1px);
}

.nav-cta-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 700;
  color: #030407;
  text-decoration: none;
  border-radius: 30px;
  background: #ffffff;
  overflow: hidden;
  transition: all var(--transition-smooth);
  box-shadow: 0 0 25px rgba(255, 255, 255, 0.35);
}

.nav-cta-btn::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: var(--hologram-conic);
  animation: rotateConic 4s linear infinite;
  z-index: 0;
}

.nav-cta-btn span {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #ffffff;
  padding: 6px 16px;
  border-radius: 24px;
  color: #030407;
}

.nav-cta-btn:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 0 35px rgba(0, 242, 254, 0.7);
}

@keyframes rotateConic {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.mobile-menu-toggle {
  display: none;
  background: transparent;
  border: none;
  color: #ffffff;
  font-size: 1.5rem;
  cursor: pointer;
}

/* ==========================================================================
   ACID HOLOGRAPHIC HERO SECTION (主题与动态背景)
   ========================================================================== */
.hero-section {
  position: relative;
  padding: 110px 0 100px;
  min-height: calc(90vh - 80px);
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-content {
  text-align: center;
  max-width: 960px;
  margin: 0 auto;
}

/* Acid Cyber Pill Tag */
.acid-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px;
  border-radius: 100px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(12px);
  margin-bottom: 28px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: #e2e8f0;
  box-shadow: 0 0 20px rgba(0, 242, 254, 0.15);
}

.acid-badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--opal-lime);
  box-shadow: 0 0 10px var(--opal-lime);
  animation: pingDot 2s ease-in-out infinite;
}

@keyframes pingDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(1.3); }
}

/* Acid Chrome Headline */
.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 6.5vw, 5.2rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.chrome-text {
  background: var(--chrome-metallic);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 2px 10px rgba(255, 255, 255, 0.15));
  position: relative;
  display: inline-block;
}

.liquid-opal-text {
  background: var(--hologram-rainbow);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: hueShift 10s ease-in-out infinite alternate;
  display: inline-block;
}

@keyframes hueShift {
  0% { filter: hue-rotate(0deg) saturate(140%); }
  100% { filter: hue-rotate(180deg) saturate(180%); }
}

.hero-subquote {
  font-size: clamp(1.1rem, 2.2vw, 1.45rem);
  font-weight: 400;
  color: #cbd5e1;
  max-width: 780px;
  margin: 0 auto 36px;
  line-height: 1.6;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.8);
}

.hero-subquote em {
  font-style: normal;
  color: var(--opal-cyan);
  font-weight: 600;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 50px;
}

/* Master Holographic Button */
.btn-hologram-primary {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 16px 42px;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-decoration: none;
  color: #030407;
  border-radius: 100px;
  background: #ffffff;
  overflow: hidden;
  box-shadow: 0 0 35px rgba(0, 242, 254, 0.6), inset 0 0 10px rgba(255, 255, 255, 0.8);
  transition: all var(--transition-smooth);
  z-index: 1;
}

.btn-hologram-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.9),
    transparent
  );
  transform: skewX(-25deg);
  transition: left 0.75s ease;
}

.btn-hologram-primary:hover::before {
  left: 200%;
}

.btn-hologram-primary:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 0 50px rgba(255, 0, 122, 0.7), 0 0 80px rgba(0, 242, 254, 0.5);
  background: #ffffff;
}

.btn-glass-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 36px;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  text-decoration: none;
  color: #ffffff;
  border-radius: 100px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(12px);
  transition: all var(--transition-fast);
}

.btn-glass-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--opal-cyan);
  box-shadow: 0 0 25px rgba(0, 242, 254, 0.3);
  transform: translateY(-2px);
}

/* Hero Metrics Acid Grid */
.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 20px;
}

.metric-pill {
  background: rgba(14, 18, 28, 0.6);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 18px;
  padding: 18px 20px;
  text-align: left;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-smooth);
}

.metric-pill:hover {
  border-color: rgba(0, 242, 254, 0.4);
  transform: translateY(-4px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.5), 0 0 20px rgba(0, 242, 254, 0.2);
}

.metric-num {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  line-height: 1;
  background: var(--chrome-metallic);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 6px;
}

.metric-label {
  font-size: 0.8rem;
  color: #94a3b8;
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* ==========================================================================
   SECTION COMMON STYLES
   ========================================================================== */
section {
  position: relative;
  padding: 110px 0;
  z-index: 2;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 60px;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--opal-cyan);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 12px;
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid rgba(0, 242, 254, 0.2);
  padding: 4px 14px;
  border-radius: 30px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.05rem;
  color: #94a3b8;
  line-height: 1.6;
}

/* ==========================================================================
   1. 节点延迟和状态板块 (NODE CRYSTALS & STATUS)
   能量水晶原石包装：香港红宝石、东京蓝宝石、洛杉矶翡翠等
   ========================================================================== */
.nodes-filter-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.filter-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #94a3b8;
  padding: 8px 20px;
  border-radius: 30px;
  font-size: 0.88rem;
  font-family: var(--font-display);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover, .filter-btn.active {
  background: rgba(255, 255, 255, 0.15);
  color: #ffffff;
  border-color: var(--opal-cyan);
  box-shadow: 0 0 16px rgba(0, 242, 254, 0.35);
}

.crystal-nodes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 24px;
}

/* Holographic Crystal Card */
.crystal-card {
  position: relative;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  padding: 26px;
  overflow: hidden;
  transition: all var(--transition-smooth);
  cursor: pointer;
}

/* Rainbow Foil Glare on Hover */
.crystal-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: 24px;
  padding: 1.5px;
  background: var(--hologram-conic);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0.3;
  transition: opacity var(--transition-smooth);
}

.crystal-card::after {
  content: '';
  position: absolute;
  top: -100%;
  left: -100%;
  width: 300%;
  height: 300%;
  background: radial-gradient(
    circle at 50% 50%,
    rgba(255, 255, 255, 0.25) 0%,
    rgba(0, 242, 254, 0.15) 30%,
    rgba(255, 0, 122, 0.1) 60%,
    transparent 70%
  );
  opacity: 0;
  pointer-events: none;
  transform: rotate(25deg);
  transition: opacity var(--transition-smooth), transform var(--transition-smooth);
}

.crystal-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255, 255, 255, 0.3);
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.7), 0 0 30px var(--crystal-glow, rgba(0, 242, 254, 0.35));
}

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

.crystal-card:hover::after {
  opacity: 1;
  transform: translate(30%, 30%) rotate(25deg);
}

/* Crystal Specific Theme Variations */
.crystal-card[data-type="ruby"] {
  --crystal-glow: rgba(255, 51, 102, 0.4);
}
.crystal-card[data-type="sapphire"] {
  --crystal-glow: rgba(79, 172, 254, 0.4);
}
.crystal-card[data-type="emerald"] {
  --crystal-glow: rgba(0, 255, 135, 0.4);
}
.crystal-card[data-type="amethyst"] {
  --crystal-glow: rgba(155, 81, 224, 0.4);
}
.crystal-card[data-type="diamond"] {
  --crystal-glow: rgba(255, 255, 255, 0.4);
}
.crystal-card[data-type="obsidian"] {
  --crystal-glow: rgba(255, 190, 11, 0.4);
}

.crystal-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 20px;
}

.gem-facet-icon {
  width: 54px;
  height: 54px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.gem-facet-icon svg {
  width: 32px;
  height: 32px;
  filter: drop-shadow(0 0 8px currentColor);
}

.node-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  background: rgba(0, 255, 135, 0.1);
  color: var(--opal-lime);
  border: 1px solid rgba(0, 255, 135, 0.3);
}

.node-status-pill .pulse {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 8px currentColor;
  animation: pingDot 1.5s infinite;
}

.node-info-block {
  margin-bottom: 18px;
}

.node-gem-name {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: #ffffff;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
}

.node-gem-name .flag {
  font-size: 1.15rem;
}

.node-gem-sub {
  font-size: 0.84rem;
  color: #94a3b8;
}

/* Crystal Metrics Row */
.crystal-metrics-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  background: rgba(0, 0, 0, 0.25);
  border-radius: 14px;
  padding: 12px 14px;
  margin-bottom: 18px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.c-metric-item {
  display: flex;
  flex-direction: column;
}

.c-metric-label {
  font-size: 0.7rem;
  color: #64748b;
  font-family: var(--font-mono);
  text-transform: uppercase;
}

.c-metric-val {
  font-family: var(--font-mono);
  font-size: 0.98rem;
  font-weight: 700;
  color: #ffffff;
}

.c-metric-val.latency {
  color: var(--opal-lime);
}

.c-metric-val.loss {
  color: #38bdf8;
}

.c-metric-val.speed {
  color: #f472b6;
}

/* Unlock Badges */
.unlock-tags-row {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}

.unlock-tag {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  padding: 3px 8px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.04);
  color: #cbd5e1;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.card-action-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 14px;
}

.test-ping-btn {
  background: transparent;
  border: none;
  color: var(--opal-cyan);
  font-size: 0.82rem;
  font-family: var(--font-mono);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.test-ping-btn:hover {
  color: #ffffff;
  text-shadow: 0 0 10px var(--opal-cyan);
}

.node-connect-btn {
  font-size: 0.82rem;
  font-family: var(--font-display);
  font-weight: 700;
  color: #ffffff;
  text-decoration: none;
  background: rgba(255, 255, 255, 0.08);
  padding: 6px 14px;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  transition: all var(--transition-fast);
}

.node-connect-btn:hover {
  background: var(--opal-cyan);
  color: #030407;
  border-color: var(--opal-cyan);
  box-shadow: 0 0 15px var(--opal-cyan);
}

/* ==========================================================================
   2. 套餐价格板块 (PRICING PLANS)
   镭射全息质感、月付/季付/年付/按量切换
   ========================================================================== */
.pricing-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-bottom: 48px;
}

.billing-switch {
  display: inline-flex;
  background: rgba(14, 18, 28, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 4px;
  border-radius: 40px;
  backdrop-filter: blur(12px);
}

.billing-opt {
  background: transparent;
  border: none;
  color: #94a3b8;
  padding: 8px 24px;
  border-radius: 30px;
  font-family: var(--font-display);
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.billing-opt.active {
  background: #ffffff;
  color: #030407;
  box-shadow: 0 0 20px rgba(255, 255, 255, 0.4);
}

.save-badge {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  background: rgba(255, 0, 122, 0.15);
  color: var(--opal-magenta);
  border: 1px solid rgba(255, 0, 122, 0.4);
  padding: 4px 10px;
  border-radius: 20px;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 26px;
  align-items: stretch;
}

.pricing-card {
  position: relative;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: 28px;
  padding: 36px 30px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-smooth);
  overflow: hidden;
}

.pricing-card:hover {
  transform: translateY(-8px);
  border-color: rgba(255, 255, 255, 0.3);
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.6), 0 0 30px rgba(0, 242, 254, 0.25);
}

.pricing-card.featured {
  border-color: rgba(0, 242, 254, 0.6);
  background: rgba(18, 24, 38, 0.75);
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.7), 0 0 40px rgba(0, 242, 254, 0.35);
  transform: scale(1.03);
}

.pricing-card.featured:hover {
  transform: scale(1.05) translateY(-6px);
  box-shadow: 0 35px 80px rgba(0, 0, 0, 0.8), 0 0 50px rgba(255, 0, 122, 0.4);
}

.pricing-ribbon {
  position: absolute;
  top: 18px;
  right: -32px;
  transform: rotate(45deg);
  background: var(--hologram-rainbow);
  color: #030407;
  font-size: 0.72rem;
  font-family: var(--font-display);
  font-weight: 800;
  text-transform: uppercase;
  padding: 4px 40px;
  letter-spacing: 0.08em;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.4);
}

.plan-head {
  margin-bottom: 24px;
}

.plan-tier-name {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 8px;
}

.plan-tier-desc {
  font-size: 0.88rem;
  color: #94a3b8;
  min-height: 42px;
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 28px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 24px;
}

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

.plan-price {
  font-family: var(--font-display);
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1;
  background: var(--chrome-metallic);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.plan-period {
  font-size: 0.9rem;
  color: #64748b;
  font-family: var(--font-mono);
}

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

.plan-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: #cbd5e1;
}

.plan-features li .check-icon {
  color: var(--opal-cyan);
  font-size: 1rem;
}

.plan-features li.strong {
  font-weight: 600;
  color: #ffffff;
}

.plan-cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 14px 24px;
  border-radius: 100px;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  text-decoration: none;
  transition: all var(--transition-smooth);
}

.plan-cta-btn.standard {
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.plan-cta-btn.standard:hover {
  background: rgba(255, 255, 255, 0.18);
  border-color: var(--opal-cyan);
  box-shadow: 0 0 20px rgba(0, 242, 254, 0.3);
  transform: translateY(-2px);
}

.plan-cta-btn.featured-btn {
  background: #ffffff;
  color: #030407;
  box-shadow: 0 0 25px rgba(0, 242, 254, 0.5);
}

.plan-cta-btn.featured-btn:hover {
  background: var(--opal-cyan);
  box-shadow: 0 0 35px var(--opal-cyan);
  transform: translateY(-2px);
}

/* ==========================================================================
   3. 核心优势板块 (CORE ADVANTAGES)
   全息卡片、镀铬排版、科技矩阵
   ========================================================================== */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 28px;
}

.advantage-card {
  position: relative;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  padding: 34px 30px;
  overflow: hidden;
  transition: all var(--transition-smooth);
}

.advantage-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255, 255, 255, 0.3);
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.6), 0 0 30px rgba(155, 81, 224, 0.25);
}

.adv-icon-badge {
  width: 58px;
  height: 58px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  color: var(--opal-cyan);
}

.adv-icon-badge svg {
  width: 28px;
  height: 28px;
}

.adv-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 12px;
}

.adv-text {
  font-size: 0.95rem;
  color: #94a3b8;
  line-height: 1.65;
}

.adv-keywords-pills {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 18px;
}

.adv-pill {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid rgba(0, 242, 254, 0.2);
  color: #38bdf8;
  padding: 2px 8px;
  border-radius: 4px;
}

/* ==========================================================================
   4. 常见问题板块 (FAQ ACCORDION)
   酸性金属折叠面板
   ========================================================================== */
.faq-container {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: 18px;
  overflow: hidden;
  transition: all var(--transition-fast);
}

.faq-item.active {
  border-color: rgba(0, 242, 254, 0.4);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4), 0 0 20px rgba(0, 242, 254, 0.15);
}

.faq-question {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  padding: 22px 26px;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  gap: 16px;
}

.faq-arrow {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  transition: transform var(--transition-smooth);
}

.faq-item.active .faq-arrow {
  transform: rotate(180deg);
  background: var(--opal-cyan);
  color: #030407;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-smooth);
  padding: 0 26px;
}

.faq-answer p {
  padding-bottom: 22px;
  color: #94a3b8;
  font-size: 0.96rem;
  line-height: 1.7;
}

/* ==========================================================================
   5. 用户评价板块 (TESTIMONIALS / REVIEWS)
   ========================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.review-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: 22px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-smooth);
}

.review-card:hover {
  transform: translateY(-5px);
  border-color: rgba(255, 255, 255, 0.25);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6), 0 0 25px rgba(255, 0, 122, 0.2);
}

.review-stars {
  color: var(--opal-gold);
  font-size: 1.1rem;
  margin-bottom: 16px;
  letter-spacing: 2px;
}

.review-text {
  font-size: 0.95rem;
  color: #cbd5e1;
  line-height: 1.65;
  margin-bottom: 22px;
  font-style: italic;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 16px;
}

.avatar-gem {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--hologram-conic);
  padding: 2px;
}

.avatar-inner {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: #0d1117;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.95rem;
  color: #ffffff;
}

.author-meta {
  display: flex;
  flex-direction: column;
}

.author-name {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: #ffffff;
}

.author-role {
  font-size: 0.78rem;
  color: #64748b;
  font-family: var(--font-mono);
}

/* ==========================================================================
   CALL TO ACTION INTERSTELLAR BANNER
   ========================================================================== */
.cta-banner-section {
  padding: 80px 0 120px;
}

.cta-banner-box {
  position: relative;
  border-radius: 32px;
  background: linear-gradient(135deg, rgba(20, 24, 38, 0.8) 0%, rgba(10, 12, 20, 0.9) 100%);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 60px 40px;
  text-align: center;
  overflow: hidden;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.7), 0 0 50px rgba(0, 242, 254, 0.2);
}

.cta-banner-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--hologram-rainbow);
}

.cta-banner-title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4.5vw, 3.4rem);
  font-weight: 900;
  margin-bottom: 16px;
}

.cta-banner-sub {
  font-size: 1.15rem;
  color: #94a3b8;
  max-width: 640px;
  margin: 0 auto 36px;
}

/* ==========================================================================
   FOOTER (Note: robots.txt and sitemap.xml do NOT appear here per user prompt)
   ========================================================================== */
.site-footer {
  position: relative;
  z-index: 10;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(4, 5, 8, 0.95);
  padding: 60px 0 30px;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand p {
  color: #64748b;
  font-size: 0.88rem;
  max-width: 320px;
  margin-top: 12px;
  line-height: 1.6;
}

.footer-col h4 {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 18px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col a {
  color: #94a3b8;
  text-decoration: none;
  font-size: 0.88rem;
  transition: color var(--transition-fast);
}

.footer-col a:hover {
  color: var(--opal-cyan);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: #64748b;
  font-family: var(--font-mono);
}

/* ==========================================================================
   RESPONSIVE DESIGN
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-metrics {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-top {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .nav-links.mobile-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(7, 9, 14, 0.98);
    backdrop-filter: blur(24px);
    padding: 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }
  .mobile-menu-toggle {
    display: block;
  }
  .hero-metrics {
    grid-template-columns: 1fr;
  }
  .crystal-nodes-grid {
    grid-template-columns: 1fr;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .pricing-card.featured {
    transform: none;
  }
  .pricing-card.featured:hover {
    transform: translateY(-4px);
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}