/* ==========================================================================
   TAG Cloud & Network Matrix - Industrial Tech & Data Center Theme
   Palette: Deep Blue-Black #0A0E1A | Server Green #10B981 | LED Orange #F59E0B
   Zero external dependencies | Native CSS | Highly Optimized
   ========================================================================== */

:root {
  --bg-dark: #0A0E1A;
  --bg-card: #0F1526;
  --bg-card-hover: #151D33;
  --bg-card-subtle: #0B101F;
  --border-color: rgba(16, 185, 129, 0.15);
  --border-highlight: rgba(16, 185, 129, 0.55);
  --border-amber: rgba(245, 158, 11, 0.4);
  
  --text-main: #F3F4F6;
  --text-muted: #9CA3AF;
  --text-dim: #6B7280;
  
  --primary: #10B981;          /* Server Green */
  --primary-hover: #059669;
  --primary-glow: rgba(16, 185, 129, 0.5);
  --primary-glow-30: 0 0 30px rgba(16, 185, 129, 0.5);
  
  --secondary: #F59E0B;        /* LED Orange / Amber */
  --secondary-glow: rgba(245, 158, 11, 0.4);
  
  --gradient-cta: linear-gradient(135deg, #10B981 0%, #F59E0B 100%);
  --gradient-server: linear-gradient(180deg, #111827 0%, #0d121f 100%);
  --gradient-badge: linear-gradient(135deg, rgba(16, 185, 129, 0.15) 0%, rgba(245, 158, 11, 0.15) 100%);

  --radius-btn: 12px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", monospace, sans-serif;
  --container-max: 1240px;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* Accessibility: Skip to Main Content */
.skip-to-main {
  position: absolute;
  top: -9999px;
  left: 20px;
  background: var(--bg-card);
  color: var(--primary);
  border: 2px solid var(--primary);
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 15px;
  z-index: 99999;
  text-decoration: none;
  box-shadow: 0 0 24px rgba(16, 185, 129, 0.6);
  transition: top 0.2s ease;
}

.skip-to-main:focus,
.skip-to-main:focus-visible {
  top: 20px;
  outline: 2px solid var(--secondary);
}

/* Accessible Focus Ring */
a:focus-visible,
button:focus-visible,
summary:focus-visible,
input:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  box-shadow: 0 0 12px rgba(16, 185, 129, 0.6);
}

/* Anchor Target Scroll Offset for Fixed Header */
section[id],
article[id],
h2[id],
h3[id],
.pricing-section,
.faq-section,
.features-section,
.section-anchor {
  scroll-margin-top: 88px;
}

html {
  scroll-behavior: smooth;
  font-family: var(--font-stack);
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background-color: var(--bg-dark);
  position: relative;
  /* 数据中心 + 服务器矩阵 工业科技网格背景 */
  background-image: 
    linear-gradient(to right, rgba(16, 185, 129, 0.1) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(16, 185, 129, 0.1) 1px, transparent 1px),
    radial-gradient(circle at 1px 1px, rgba(16, 185, 129, 0.3) 1.5px, transparent 0);
  background-size: 48px 48px, 48px 48px, 48px 48px;
  background-position: -1px -1px;
  background-attachment: fixed;
}

/* ==========================================================================
   Background Animations: Scanline, Grid Overlay & Breathing Glows
   ========================================================================== */
.bg-scanline {
  position: fixed;
  top: -5%;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, 
    transparent 0%, 
    rgba(16, 185, 129, 0.25) 15%, 
    rgba(16, 185, 129, 1) 50%, 
    rgba(16, 185, 129, 0.25) 85%, 
    transparent 100%
  );
  box-shadow: 0 0 18px #10B981, 0 0 45px rgba(16, 185, 129, 0.85);
  pointer-events: none;
  z-index: 99;
  opacity: 0.85;
  animation: scanlineSweep 8s linear infinite;
}

@keyframes scanlineSweep {
  0% {
    top: -3%;
    opacity: 0;
  }
  8% {
    opacity: 0.95;
  }
  92% {
    opacity: 0.95;
  }
  100% {
    top: 103%;
    opacity: 0;
  }
}

.bg-glow-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: hidden;
  z-index: 0;
}

/* 数据中心服务器矩阵固定网格层 (极具质感且高辨识度的机房科技背景) */
.bg-matrix-grid {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(to right, rgba(16, 185, 129, 0.1) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(16, 185, 129, 0.1) 1px, transparent 1px),
    radial-gradient(circle at 1px 1px, rgba(16, 185, 129, 0.35) 1.5px, transparent 0);
  background-size: 44px 44px, 44px 44px, 44px 44px;
  background-position: -1px -1px;
  pointer-events: none;
  z-index: 1;
}

/* 2 个绿/橙大型 blur 光晕缓慢呼吸缩放 (明显可见且极具科技纵深感) */
.bg-glow-green {
  position: absolute;
  top: 5%;
  left: -5%;
  width: 780px;
  height: 780px;
  background: radial-gradient(circle, 
    rgba(16, 185, 129, 0.45) 0%, 
    rgba(16, 185, 129, 0.24) 30%, 
    rgba(16, 185, 129, 0.08) 55%, 
    transparent 72%
  );
  filter: blur(75px);
  border-radius: 50%;
  animation: glowBreatheGreen 10s ease-in-out infinite alternate;
}

.bg-glow-orange {
  position: absolute;
  top: 25%;
  right: -8%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, 
    rgba(245, 158, 11, 0.42) 0%, 
    rgba(245, 158, 11, 0.22) 32%, 
    rgba(245, 158, 11, 0.07) 55%, 
    transparent 72%
  );
  filter: blur(80px);
  border-radius: 50%;
  animation: glowBreatheOrange 9s ease-in-out infinite alternate;
}

@keyframes glowBreatheGreen {
  0% {
    transform: scale(0.85) translate(0, 0);
    opacity: 0.75;
  }
  50% {
    transform: scale(1.22) translate(50px, 30px);
    opacity: 1;
  }
  100% {
    transform: scale(0.92) translate(-30px, 60px);
    opacity: 0.8;
  }
}

@keyframes glowBreatheOrange {
  0% {
    transform: scale(0.9) translate(0, 0);
    opacity: 0.75;
  }
  50% {
    transform: scale(1.25) translate(-60px, -40px);
    opacity: 1;
  }
  100% {
    transform: scale(0.88) translate(40px, -50px);
    opacity: 0.75;
  }
}

/* Layout Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
  position: relative;
  z-index: 2;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

img, svg {
  display: block;
}

/* Header & Nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 14, 26, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-color);
  padding: 16px 0;
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.logo-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: var(--gradient-cta);
  border-radius: var(--radius-sm);
  font-weight: 800;
  font-size: 19px;
  color: #0A0E1A;
  letter-spacing: 0.5px;
  box-shadow: 0 0 20px rgba(16, 185, 129, 0.6);
}

.brand-text {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: #ffffff;
}

.brand-tag {
  font-size: 11px;
  background: rgba(16, 185, 129, 0.15);
  color: var(--primary);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(16, 185, 129, 0.35);
  margin-left: 4px;
}

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

.nav-link {
  font-size: 14.5px;
  color: var(--text-muted);
  transition: var(--transition);
  font-weight: 500;
}

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

/* ==========================================================================
   CTA Button UI - Gradient Green to Orange with 30px Green Glow
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 700;
  border-radius: var(--radius-btn); /* 12px */
  transition: var(--transition);
  cursor: pointer;
  white-space: nowrap;
  border: 1px solid transparent;
  position: relative;
}

.btn-primary {
  background: var(--gradient-cta);
  color: #0A0E1A; /* High contrast dark text on bright gradient */
  box-shadow: 0 0 30px rgba(16, 185, 129, 0.5); /* 30px Green Glow */
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 38px rgba(16, 185, 129, 0.75), 0 0 16px rgba(245, 158, 11, 0.45);
  filter: brightness(1.08);
}

.btn-secondary {
  background: rgba(15, 21, 38, 0.8);
  color: var(--text-main);
  border-color: var(--border-color);
  border-radius: var(--radius-btn);
}

.btn-secondary:hover {
  background: rgba(21, 29, 51, 0.95);
  border-color: var(--border-highlight);
  color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 0 20px rgba(16, 185, 129, 0.2);
}

.btn-lg {
  padding: 15px 34px;
  font-size: 16px;
  border-radius: var(--radius-btn);
}

.btn-block {
  width: 100%;
}

/* Section Shared Header */
.section-padding {
  padding: 84px 0;
  position: relative;
  z-index: 1;
}

.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 52px;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: var(--gradient-badge);
  border: 1px solid rgba(16, 185, 129, 0.35);
  border-radius: var(--radius-full);
  font-size: 12.5px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

.section-title {
  font-size: 34px;
  font-weight: 800;
  line-height: 1.25;
  color: #ffffff;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.section-desc {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ==========================================================================
   Hero Section with Right Side 1U Server Stack Matrix
   ========================================================================== */
.hero-section {
  padding: 80px 0 60px;
  position: relative;
  z-index: 1;
}

.hero-layout {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.35);
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 600;
  color: #6ee7b7;
  margin-bottom: 22px;
}

.hero-pill .dot {
  width: 8px;
  height: 8px;
  background: var(--primary);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--primary);
}

.hero-headline {
  font-size: 46px;
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -1px;
  margin-bottom: 22px;
  color: #ffffff;
}

.hero-headline .text-gradient {
  background: linear-gradient(135deg, #10B981 0%, #F59E0B 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subheadline {
  font-size: 16.5px;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 34px;
}

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

.hero-highlights {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  border-top: 1px solid var(--border-color);
  padding-top: 32px;
}

.highlight-item {
  text-align: left;
}

.highlight-val {
  font-size: 24px;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 4px;
}

.highlight-val span {
  color: var(--secondary);
}

.highlight-label {
  font-size: 12.5px;
  color: var(--text-dim);
}

/* ==========================================================================
   Right Side Animation: 4x 1U Server Units Vertical Stack
   Floating Cabinet (4s cycle) | 3 LEDs Blinking | Pulsing Glow | Load Bar
   ========================================================================== */
.server-rack-visual {
  width: 100%;
  display: flex;
  justify-content: center;
  perspective: 1000px;
}

.server-chassis-frame {
  width: 100%;
  max-width: 480px;
  background: rgba(11, 16, 29, 0.9);
  border: 2px solid rgba(16, 185, 129, 0.3);
  border-radius: 16px;
  padding: 22px;
  box-shadow: 0 0 35px rgba(0, 0, 0, 0.7), inset 0 0 20px rgba(16, 185, 129, 0.05);
  animation: rackFloat 4s ease-in-out infinite alternate; /* 整个机柜上下浮动 4 秒一周期 */
}

@keyframes rackFloat {
  0% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-12px);
  }
  100% {
    transform: translateY(0px);
  }
}

.rack-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
}

.rack-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  color: #94a3b8;
  letter-spacing: 0.5px;
}

.rack-logo-dot {
  width: 8px;
  height: 8px;
  background: var(--primary);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--primary);
}

.rack-status-badge {
  font-size: 11px;
  font-weight: 700;
  padding: 3px 9px;
  border-radius: var(--radius-full);
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.4);
  color: var(--primary);
  letter-spacing: 0.5px;
}

.server-units-stack {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Single 1U Server Unit */
.server-unit {
  display: flex;
  align-items: center;
  background: #0d1322;
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: 8px;
  padding: 10px 8px;
  position: relative;
  transition: var(--transition);
}

/* Staggered unit pulse glow */
.server-unit.unit-1 {
  animation: unitGlowPulse 3s ease-in-out infinite 0s;
}
.server-unit.unit-2 {
  animation: unitGlowPulse 3s ease-in-out infinite 0.75s;
}
.server-unit.unit-3 {
  animation: unitGlowPulse 3s ease-in-out infinite 1.5s;
}
.server-unit.unit-4 {
  animation: unitGlowPulse 3s ease-in-out infinite 2.25s;
}

@keyframes unitGlowPulse {
  0%, 100% {
    border-color: rgba(16, 185, 129, 0.25);
    box-shadow: 0 0 10px rgba(16, 185, 129, 0.12), inset 0 0 8px rgba(16, 185, 129, 0.03);
  }
  50% {
    border-color: rgba(16, 185, 129, 0.65);
    box-shadow: 0 0 22px rgba(16, 185, 129, 0.4), inset 0 0 12px rgba(16, 185, 129, 0.12);
  }
}

.rack-ear {
  width: 14px;
  display: flex;
  justify-content: center;
  flex-shrink: 0;
}

.screw {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #334155;
  border: 1px solid #64748b;
}

.unit-body {
  flex-grow: 1;
  padding: 0 10px;
}

.unit-top-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.led-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

.led {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  display: inline-block;
}

.led-green {
  background: #10B981;
  box-shadow: 0 0 8px #10B981;
}

.led-orange {
  background: #F59E0B;
  box-shadow: 0 0 8px #F59E0B;
}

/* 3 LEDs blinking at different tempos */
.led-blink-fast {
  animation: ledBlink 0.6s infinite alternate ease-in-out;
}

.led-blink-med {
  animation: ledBlink 1.1s infinite alternate ease-in-out;
}

.led-blink-sync {
  animation: ledBlink 1.8s infinite alternate ease-in-out;
}

@keyframes ledBlink {
  0% {
    opacity: 0.2;
    transform: scale(0.85);
  }
  100% {
    opacity: 1;
    transform: scale(1.1);
  }
}

.unit-label {
  font-size: 12px;
  font-family: monospace, monospace;
  font-weight: 700;
  color: #e2e8f0;
  letter-spacing: 0.3px;
}

.unit-metric {
  font-size: 11px;
  font-family: monospace, monospace;
  color: var(--secondary);
}

.unit-bottom-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.load-label {
  font-size: 10px;
  color: var(--text-dim);
  font-weight: 700;
  font-family: monospace;
}

.load-track {
  flex-grow: 1;
  height: 5px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 3px;
  overflow: hidden;
}

.load-fill {
  height: 100%;
  background: linear-gradient(90deg, #10B981, #F59E0B);
  border-radius: 3px;
  position: relative;
}

.load-pct {
  font-size: 10.5px;
  font-family: monospace;
  color: #94a3b8;
  width: 32px;
  text-align: right;
}

/* ==========================================================================
   Core Advantages (3 Cards)
   ========================================================================== */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.adv-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 36px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.adv-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-cta);
  opacity: 0;
  transition: var(--transition);
}

.adv-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-highlight);
  background: var(--bg-card-hover);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.5), 0 0 20px rgba(16, 185, 129, 0.15);
}

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

.adv-icon-box {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-sm);
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  margin-bottom: 24px;
}

.adv-icon-box svg {
  width: 28px;
  height: 28px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
}

.adv-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 12px;
}

.adv-card p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ==========================================================================
   Streaming & AI Cards
   ========================================================================== */
.media-ai-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.media-ai-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px 26px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.media-ai-card:hover {
  border-color: var(--border-highlight);
  transform: translateY(-4px);
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.4), 0 0 20px rgba(16, 185, 129, 0.12);
}

.card-top-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
  width: fit-content;
}

.tag-ai {
  background: rgba(16, 185, 129, 0.15);
  color: #6ee7b7;
  border: 1px solid rgba(16, 185, 129, 0.35);
}

.tag-stream {
  background: rgba(245, 158, 11, 0.15);
  color: #fcd34d;
  border: 1px solid rgba(245, 158, 11, 0.35);
}

.tag-commerce {
  background: rgba(16, 185, 129, 0.12);
  color: #a7f3d0;
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.media-ai-card h3 {
  font-size: 21px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 12px;
}

.media-ai-card p {
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 24px;
}

.badges-pill-list {
  margin-top: auto;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tech-pill {
  font-size: 12px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 5px 11px;
  border-radius: var(--radius-full);
  color: #e2e8f0;
  font-weight: 500;
}

/* ==========================================================================
   Pricing Table (4 Cards Responsive)
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  align-items: stretch;
}

@media (max-width: 1200px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 34px 26px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition);
}

.pricing-card.featured {
  background: linear-gradient(180deg, #151d33 0%, #0d1322 100%);
  border-color: rgba(16, 185, 129, 0.7);
  box-shadow: 0 0 35px rgba(16, 185, 129, 0.3);
  transform: scale(1.02);
  z-index: 2;
}

.pricing-card:hover {
  border-color: var(--border-highlight);
  transform: translateY(-4px);
}

.pricing-card.featured:hover {
  transform: scale(1.02) translateY(-4px);
}

.featured-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-cta);
  color: #0A0E1A;
  font-size: 12px;
  font-weight: 800;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  letter-spacing: 0.5px;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.4);
  white-space: nowrap;
}

.plan-header {
  margin-bottom: 20px;
}

.plan-name {
  font-size: 20px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 8px;
}

.plan-subtitle {
  font-size: 13px;
  color: var(--text-muted);
}

.price-box {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 22px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--border-color);
}

.price-currency {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
}

.price-amount {
  font-size: 44px;
  font-weight: 900;
  color: #ffffff;
  letter-spacing: -1px;
}

.price-period {
  font-size: 13.5px;
  color: var(--text-dim);
}

.plan-features {
  margin-bottom: 30px;
  flex-grow: 1;
}

.plan-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: #cbd5e1;
  margin-bottom: 14px;
  line-height: 1.5;
}

.plan-features li svg {
  width: 18px;
  height: 18px;
  stroke: var(--primary);
  flex-shrink: 0;
  margin-top: 2px;
}

/* ==========================================================================
   User Testimonials
   ========================================================================== */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 30px;
  transition: var(--transition);
}

.testimonial-card:hover {
  border-color: var(--border-highlight);
  transform: translateY(-4px);
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.4);
}

.rating-stars {
  display: flex;
  gap: 4px;
  color: var(--secondary);
  margin-bottom: 16px;
}

.rating-stars svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.testimonial-quote {
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
  font-style: italic;
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 12px;
}

.avatar-circle {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--gradient-cta);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #0A0E1A;
  font-size: 14px;
}

.user-info .user-name {
  font-size: 15px;
  font-weight: 600;
  color: #ffffff;
}

.user-info .user-title {
  font-size: 12px;
  color: var(--text-dim);
}

/* ==========================================================================
   FAQ Accordion (Semantic Details & Summary)
   ========================================================================== */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

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

.faq-item:hover {
  border-color: var(--border-highlight);
}

.faq-item[open] {
  border-color: var(--border-highlight);
  background: var(--bg-card-hover);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: #ffffff;
  cursor: pointer;
  user-select: none;
  list-style: none;
}

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

.faq-chevron {
  width: 20px;
  height: 20px;
  stroke: var(--text-muted);
  stroke-width: 2;
  fill: none;
  transition: transform 0.25s ease;
  flex-shrink: 0;
  margin-left: 12px;
}

.faq-item[open] .faq-chevron {
  transform: rotate(180deg);
  stroke: var(--primary);
}

.faq-answer {
  padding: 0 24px 22px;
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.7;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  padding-top: 16px;
}

/* CTA Bottom Banner */
.cta-banner-section {
  padding: 60px 0 90px;
}

.cta-banner-box {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(245, 158, 11, 0.1) 100%);
  border: 1px solid rgba(16, 185, 129, 0.4);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

.cta-banner-title {
  font-size: 36px;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 16px;
}

.cta-banner-desc {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 620px;
  margin: 0 auto 36px;
}

/* ==========================================================================
   Footer (Strictly 4 Links Opening in New Page)
   ========================================================================== */
.site-footer {
  border-top: 1px solid var(--border-color);
  background: #070a13;
  padding: 44px 0 36px;
  margin-top: auto;
  position: relative;
  z-index: 1;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 24px;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
}

.footer-nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-muted);
  transition: var(--transition);
  position: relative;
  padding: 6px 4px;
}

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

.footer-copyright {
  font-size: 13px;
  color: var(--text-dim);
}

/* Content Page Layout (For about.html, terms.html, privacy.html, sitemap.html, tech-insights.html) */
.content-page {
  padding: 60px 0 80px;
  position: relative;
  z-index: 1;
}

.content-article {
  max-width: 860px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 48px;
}

.content-article h1 {
  font-size: 32px;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 12px;
}

.content-meta {
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 36px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.content-body h2 {
  font-size: 22px;
  font-weight: 700;
  color: #ffffff;
  margin: 36px 0 16px;
}

.content-body h3 {
  font-size: 18px;
  font-weight: 600;
  color: #e2e8f0;
  margin: 24px 0 12px;
}

.content-body p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 18px;
}

.content-body ul {
  list-style: disc;
  padding-left: 24px;
  margin-bottom: 20px;
}

.content-body ul li {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 8px;
}

.notice-box {
  background: rgba(16, 185, 129, 0.08);
  border-left: 4px solid var(--primary);
  border-radius: 4px;
  padding: 18px 20px;
  margin: 24px 0;
  color: #cbd5e1;
  font-size: 14.5px;
  line-height: 1.7;
}

.notice-box.alert {
  background: rgba(245, 158, 11, 0.1);
  border-left-color: var(--secondary);
}

.back-home-bar {
  margin-bottom: 24px;
}

.back-home-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-muted);
  transition: var(--transition);
}

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

/* Knowledge Base / Wiki Card Styles */
.knowledge-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 32px;
}

.knowledge-card {
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.knowledge-card:hover {
  border-color: var(--border-highlight);
  background: var(--bg-card);
  transform: translateY(-3px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.4), 0 0 15px rgba(16, 185, 129, 0.1);
}

.knowledge-tag {
  display: inline-flex;
  align-items: center;
  font-size: 12px;
  font-weight: 700;
  color: var(--primary);
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  margin-bottom: 14px;
  width: fit-content;
}

.knowledge-card h3 {
  font-size: 19px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 12px;
}

.knowledge-card p {
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* SEO Articles Section in Knowledge Page */
.articles-section {
  margin-top: 48px;
  padding-top: 40px;
  border-top: 1px solid var(--border-color);
}

.articles-section-title {
  font-size: 24px;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 8px;
}

.articles-section-desc {
  font-size: 14.5px;
  color: var(--text-muted);
  margin-bottom: 28px;
}

.articles-list-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.article-summary-card {
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  text-decoration: none;
}

.article-summary-card:hover {
  border-color: var(--border-highlight);
  background: var(--bg-card);
  transform: translateY(-3px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.4), 0 0 15px rgba(16, 185, 129, 0.12);
}

.article-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.article-badge {
  font-size: 11px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: var(--radius-full);
  background: rgba(16, 185, 129, 0.12);
  color: var(--primary);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.article-meta-info {
  font-size: 12px;
  color: var(--text-dim);
}

.article-card-title {
  font-size: 17px;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.45;
  margin-bottom: 10px;
  transition: var(--transition);
}

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

.article-card-desc {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
  flex-grow: 1;
}

.article-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 12px;
  margin-top: auto;
}

.article-read-btn {
  font-size: 13px;
  font-weight: 600;
  color: var(--secondary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.article-word-count {
  font-size: 12px;
  color: var(--text-dim);
}

/* In-Article FAQ Section */
.article-faq-wrapper {
  margin-top: 36px;
  padding-top: 28px;
  border-top: 1px solid var(--border-color);
}

.article-faq-title {
  font-size: 20px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-faq-title svg {
  color: var(--primary);
  width: 20px;
  height: 20px;
}

@media (max-width: 768px) {
  .articles-list-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   Responsive Media Queries (@media)
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-layout {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .server-rack-visual {
    order: 2;
  }

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

  .hero-headline {
    font-size: 40px;
  }
}

@media (max-width: 768px) {
  .site-header {
    padding: 14px 0;
  }

  .nav-links {
    display: none;
  }

  .hero-section {
    padding: 50px 0 40px;
  }

  .hero-headline {
    font-size: 30px;
    letter-spacing: -0.5px;
  }

  .hero-subheadline {
    font-size: 15px;
    margin-bottom: 28px;
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
    gap: 12px;
  }

  .hero-cta-group .btn {
    width: 100%;
    min-height: 50px;
    font-size: 16px;
  }

  .hero-highlights {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 32px;
    padding-top: 24px;
  }

  .section-padding {
    padding: 54px 0;
  }

  .section-title {
    font-size: 26px;
  }

  .section-desc {
    font-size: 14.5px;
  }

  /* Single Column Layouts on Mobile */
  .advantages-grid,
  .media-ai-grid,
  .pricing-grid,
  .testimonials-grid,
  .knowledge-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }

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

  .price-amount {
    font-size: 38px;
  }

  .btn {
    min-height: 48px;
  }

  .cta-banner-box {
    padding: 40px 20px;
  }

  .cta-banner-title {
    font-size: 26px;
  }

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

  .content-article {
    padding: 24px 18px;
  }

  .content-article h1 {
    font-size: 24px;
  }
}

/* ==========================================================================
   Sitemap Specific Styles (Matrix Industrial Tech)
   ========================================================================== */
.sitemap-category-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 28px;
  transition: var(--transition);
}

.sitemap-category-box:hover {
  border-color: var(--border-highlight);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
}

.sitemap-cat-title {
  color: var(--primary);
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 10px;
}

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

.sitemap-link-card {
  display: block;
  background: rgba(17, 24, 39, 0.45);
  border: 1px solid rgba(16, 185, 129, 0.1);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  text-decoration: none;
  transition: var(--transition);
}

.sitemap-link-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-highlight);
  transform: translateX(4px);
}

.sitemap-link-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 6px;
}

.sitemap-target-title {
  color: #38bdf8;
  font-size: 15.5px;
  font-weight: 600;
  transition: color 0.2s;
}

.sitemap-link-card:hover .sitemap-target-title {
  color: var(--primary);
}

.sitemap-badge-group {
  display: inline-flex;
  gap: 6px;
  align-items: center;
}

.sitemap-badge {
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(16, 185, 129, 0.15);
  color: var(--primary);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.sitemap-badge-amber {
  background: rgba(245, 158, 11, 0.15);
  color: var(--secondary);
  border-color: rgba(245, 158, 11, 0.3);
}

.sitemap-target-desc {
  color: var(--text-muted);
  font-size: 13.5px;
  line-height: 1.5;
  margin: 0;
}

@media (max-width: 480px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .hero-headline {
    font-size: 26px;
  }

  .hero-subheadline {
    font-size: 14px;
  }

  .hero-highlights {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .cta-banner-title {
    font-size: 22px;
  }

  .section-title {
    font-size: 22px;
  }

  .btn {
    min-height: 46px;
    padding: 12px 18px;
    font-size: 14px;
  }
}

/* Accessibility: User Motion Preference */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  
  .bg-scanline {
    display: none !important;
  }

  .bg-glow-green,
  .bg-glow-amber,
  .server-chassis-frame,
  .server-unit,
  .led {
    animation: none !important;
  }
}