/* ==========================================================================
   网际快车机场 (wjkcvpn.lol) - 官方网站样式表
   视觉主题：复古美式子弹头机车：拉丝铝板与流线型水滴罩 (Streamliner Locomotive & Brushed Rivets)
   视觉核心：机场流线型车头、轻质拉丝铝板、极速专线体验
   ========================================================================== */

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

:root {
  /* Color Palette - Cold Silver Aluminum & Heavy Industrial Steel */
  --bg-main: #f1f5f9;
  --bg-secondary: #e2e8f0;
  --bg-dark: #0f172a;
  --bg-dark-card: #1e293b;
  --bg-metal-light: linear-gradient(145deg, #ffffff 0%, #f1f5f9 60%, #e2e8f0 100%);
  --bg-brushed: repeating-linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.05) 0px,
    rgba(255, 255, 255, 0.05) 1px,
    transparent 1px,
    transparent 4px
  );

  /* Metallic Gradients */
  --grad-aluminum: linear-gradient(135deg, #ffffff 0%, #e2e8f0 50%, #cbd5e1 100%);
  --grad-steel: linear-gradient(135deg, #334155 0%, #1e293b 50%, #0f172a 100%);
  --grad-cyan: linear-gradient(135deg, #0284c7 0%, #38bdf8 100%);
  --grad-orange: linear-gradient(135deg, #ea580c 0%, #f97316 100%);

  /* Text Colors */
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-light: #f8fafc;
  --text-light-muted: #94a3b8;

  /* Accent Colors */
  --accent-cyan: #0284c7;
  --accent-cyan-light: #38bdf8;
  --accent-orange: #ea580c;
  --accent-orange-light: #f97316;
  --accent-green: #10b981;
  --accent-alert: #ef4444;

  /* Borders & Inset Shadows */
  --border-metal: 1px solid #cbd5e1;
  --border-metal-dark: 1px solid #334155;
  --border-glow-cyan: 1px solid rgba(56, 189, 248, 0.5);
  
  --shadow-plunger: 0 4px 0 #0f172a, 0 8px 16px rgba(15, 23, 42, 0.15);
  --shadow-plunger-active: 0 1px 0 #0f172a, 0 2px 4px rgba(15, 23, 42, 0.2);
  --shadow-card: 0 10px 25px -5px rgba(15, 23, 42, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
  --shadow-metallic-bevel: inset 0 1px 0 rgba(255, 255, 255, 0.8), inset 0 -1px 0 rgba(0, 0, 0, 0.1);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --font-display: 'Outfit', var(--font-sans);
  --font-mono: 'JetBrains Mono', monospace;

  /* Teardrop Streamliner Radius */
  --radius-streamliner: 40px 16px 16px 40px;
  --radius-card: 16px;
  --radius-sm: 8px;
}

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(56, 189, 248, 0.06) 0%, transparent 40%),
    radial-gradient(circle at 85% 85%, rgba(249, 115, 22, 0.05) 0%, transparent 40%),
    linear-gradient(to right, rgba(203, 213, 225, 0.2) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(203, 213, 225, 0.2) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 40px 40px, 40px 40px;
}

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

a:hover {
  color: #0369a1;
}

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

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   Streamliner Rivet & Aluminum Texture Components
   ========================================================================== */
.brushed-aluminum {
  background: var(--bg-metal-light);
  border: var(--border-metal);
  box-shadow: var(--shadow-card), var(--shadow-metallic-bevel);
  position: relative;
  overflow: hidden;
}

.brushed-aluminum::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.15) 0px,
    rgba(255, 255, 255, 0.15) 1px,
    transparent 1px,
    transparent 3px
  );
  pointer-events: none;
  opacity: 0.6;
}

/* Cold Flat Rivet Details */
.rivet {
  position: absolute;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #ffffff, #cbd5e1 70%, #64748b 100%);
  box-shadow: inset 0 1px 1px rgba(0,0,0,0.4), 0 1px 1px rgba(255,255,255,0.8);
  z-index: 5;
  pointer-events: none;
}

.rivet-tl { top: 8px; left: 8px; }
.rivet-tr { top: 8px; right: 8px; }
.rivet-bl { bottom: 8px; left: 8px; }
.rivet-br { bottom: 8px; right: 8px; }

/* Streamliner Parabolic Curve */
.streamliner-shape {
  border-radius: var(--radius-streamliner);
}

/* Speed Particle Shimmer Effect */
.shimmer-line {
  position: absolute;
  top: 0;
  left: -100%;
  width: 50%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.4) 50%,
    transparent 100%
  );
  transform: skewX(-25deg);
  animation: shimmerSpeed 6s infinite ease-in-out;
  pointer-events: none;
}

@keyframes shimmerSpeed {
  0% { left: -100%; }
  30%, 100% { left: 200%; }
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 2px solid #334155;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
  padding: 14px 0;
}

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

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

.logo-badge {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
  border: 1px solid #38bdf8;
  border-radius: 12px 4px 12px 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.3);
  position: relative;
}

.logo-badge svg {
  width: 26px;
  height: 26px;
  fill: #38bdf8;
  filter: drop-shadow(0 0 4px rgba(56, 189, 248, 0.6));
}

.logo-text {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.4rem;
  color: #f8fafc;
  letter-spacing: -0.02em;
}

.logo-text span {
  color: var(--accent-cyan-light);
  margin-left: 4px;
  font-size: 0.95rem;
  font-weight: 600;
  text-transform: uppercase;
  background: rgba(56, 189, 248, 0.15);
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid rgba(56, 189, 248, 0.3);
}

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

.nav-link {
  color: #cbd5e1;
  font-weight: 500;
  font-size: 0.95rem;
  transition: all 0.2s ease;
  position: relative;
  padding: 6px 0;
}

.nav-link:hover, .nav-link.active {
  color: #38bdf8;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: #38bdf8;
  transition: width 0.2s ease;
  box-shadow: 0 0 8px #38bdf8;
}

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

.mobile-toggle {
  display: none;
  background: transparent;
  border: 1px solid #334155;
  color: #f8fafc;
  font-size: 1.5rem;
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
}

/* ==========================================================================
   Plunger Mechanical Button
   ========================================================================== */
.btn-plunger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  padding: 14px 28px;
  border-radius: 12px;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.1s ease;
  position: relative;
  user-select: none;
  outline: none;
  border: none;
}

.btn-plunger-primary {
  background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
  color: #ffffff;
  border: 1px solid #38bdf8;
  box-shadow: 0 5px 0 #075985, 0 8px 16px rgba(2, 132, 199, 0.35);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.btn-plunger-primary:hover {
  background: linear-gradient(135deg, #0369a1 0%, #0284c7 100%);
  color: #ffffff;
}

.btn-plunger-primary:active {
  transform: translateY(4px);
  box-shadow: 0 1px 0 #075985, 0 3px 6px rgba(2, 132, 199, 0.4);
}

.btn-plunger-secondary {
  background: linear-gradient(135deg, #334155 0%, #1e293b 100%);
  color: #f8fafc;
  border: 1px solid #475569;
  box-shadow: 0 5px 0 #0f172a, 0 8px 16px rgba(15, 23, 42, 0.25);
}

.btn-plunger-secondary:hover {
  color: #38bdf8;
  border-color: #38bdf8;
}

.btn-plunger-secondary:active {
  transform: translateY(4px);
  box-shadow: 0 1px 0 #0f172a, 0 3px 6px rgba(15, 23, 42, 0.3);
}

.btn-plunger-orange {
  background: linear-gradient(135deg, #ea580c 0%, #c2410c 100%);
  color: #ffffff;
  border: 1px solid #f97316;
  box-shadow: 0 5px 0 #9a3412, 0 8px 16px rgba(234, 88, 12, 0.35);
}

.btn-plunger-orange:hover {
  color: #ffffff;
  background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
}

.btn-plunger-orange:active {
  transform: translateY(4px);
  box-shadow: 0 1px 0 #9a3412;
}

/* ==========================================================================
   Hero Section - Heavy Industrial Streamliner
   ========================================================================== */
.hero-section {
  padding: 60px 0 80px 0;
  position: relative;
}

.streamliner-container-box {
  background: var(--bg-metal-light);
  border: 2px solid #cbd5e1;
  border-radius: var(--radius-streamliner);
  box-shadow: 0 20px 40px -10px rgba(15, 23, 42, 0.12), var(--shadow-metallic-bevel);
  padding: 48px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
}

.telemetry-ribbon {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #0f172a;
  color: #38bdf8;
  border: 1px solid #334155;
  padding: 6px 16px;
  border-radius: 30px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.telemetry-pulse {
  width: 8px;
  height: 8px;
  background: #38bdf8;
  border-radius: 50%;
  box-shadow: 0 0 8px #38bdf8;
  animation: pulseGlow 1.5s infinite;
}

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

.hero-title {
  font-family: var(--font-display);
  font-size: 2.8rem;
  font-weight: 900;
  line-height: 1.18;
  color: #0f172a;
  margin-bottom: 20px;
  letter-spacing: -0.03em;
}

.hero-title .gradient-text {
  background: linear-gradient(135deg, #0284c7 0%, #ea580c 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 32px;
}

.hero-description strong {
  color: var(--text-primary);
  font-weight: 700;
}

.hero-action-group {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 40px;
}

/* Industrial Tachometer Gauge Cluster */
.gauge-metrics-bar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  background: #0f172a;
  padding: 20px;
  border-radius: 16px;
  border: 1px solid #334155;
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.4);
}

.gauge-item {
  text-align: center;
  position: relative;
}

.gauge-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0;
  top: 15%;
  height: 70%;
  width: 1px;
  background: #334155;
}

.gauge-dial {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 2px solid #38bdf8;
  background: radial-gradient(circle, #1e293b 0%, #0f172a 100%);
  margin: 0 auto 8px auto;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.gauge-pointer {
  position: absolute;
  width: 2px;
  height: 18px;
  background: #f97316;
  top: 6px;
  transform-origin: bottom center;
  transform: rotate(45deg);
  transition: transform 0.5s ease;
  box-shadow: 0 0 4px #f97316;
}

.gauge-val {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.25rem;
  color: #38bdf8;
}

.gauge-lbl {
  font-size: 0.8rem;
  color: #94a3b8;
  margin-top: 2px;
}

/* Hero Visual Teardrop Vehicle Card */
.hero-visual-card {
  position: relative;
  background: #0f172a;
  border-radius: 24px;
  border: 2px solid #38bdf8;
  padding: 12px;
  box-shadow: 0 20px 40px rgba(0,0,0,0.3), 0 0 20px rgba(56, 189, 248, 0.2);
  overflow: hidden;
}

.hero-visual-card img {
  border-radius: 16px;
  width: 100%;
  height: auto;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.hero-visual-card:hover img {
  transform: scale(1.02);
}

.card-hud-overlay {
  position: absolute;
  bottom: 24px;
  left: 24px;
  right: 24px;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid #334155;
  padding: 12px 18px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: #38bdf8;
}

.hud-status {
  display: flex;
  align-items: center;
  gap: 8px;
}

.hud-dot {
  width: 8px;
  height: 8px;
  background: #10b981;
  border-radius: 50%;
  box-shadow: 0 0 8px #10b981;
}

/* ==========================================================================
   Section Headers & Components
   ========================================================================== */
section {
  padding: 80px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 56px auto;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-cyan);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  background: rgba(2, 132, 199, 0.1);
  border: 1px solid rgba(2, 132, 199, 0.3);
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.25;
  margin-bottom: 14px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   Core Advantages Section
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-metal-light);
  border: 1px solid #cbd5e1;
  border-radius: var(--radius-streamliner);
  padding: 32px 28px;
  box-shadow: var(--shadow-card), var(--shadow-metallic-bevel);
  position: relative;
  transition: all 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: #38bdf8;
  box-shadow: 0 15px 30px rgba(15, 23, 42, 0.12);
}

.feature-icon-box {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  border: 1px solid #38bdf8;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  box-shadow: 0 4px 12px rgba(2, 132, 199, 0.2);
}

.feature-icon-box svg {
  width: 30px;
  height: 30px;
  fill: #38bdf8;
}

.feature-card h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
}

.feature-telemetry {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-orange);
  background: rgba(234, 88, 12, 0.1);
  padding: 4px 10px;
  border-radius: 6px;
  display: inline-block;
  border: 1px solid rgba(234, 88, 12, 0.2);
}

/* ==========================================================================
   Pricing Section
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-metal-light);
  border: 1px solid #cbd5e1;
  border-radius: 20px;
  padding: 32px 24px;
  box-shadow: var(--shadow-card), var(--shadow-metallic-bevel);
  position: relative;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
}

.pricing-card.popular {
  border: 2px solid #0284c7;
  background: linear-gradient(145deg, #ffffff 0%, #f0f9ff 100%);
  transform: scale(1.03);
  box-shadow: 0 20px 40px rgba(2, 132, 199, 0.15);
  overflow: visible;
}

.popular-badge {
  position: absolute;
  top: -14px;
  right: 24px;
  z-index: 2;
  background: linear-gradient(135deg, #ea580c 0%, #f97316 100%);
  color: #ffffff;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 800;
  padding: 4px 14px;
  border-radius: 20px;
  box-shadow: 0 4px 10px rgba(234, 88, 12, 0.3);
  letter-spacing: 0.05em;
}

.plan-name {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.plan-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  min-height: 40px;
  margin-bottom: 20px;
}

.plan-price-box {
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid #e2e8f0;
}

.plan-price {
  font-family: var(--font-mono);
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--accent-cyan);
}

.plan-price span {
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--text-muted);
}

.plan-features {
  margin-bottom: 32px;
  flex-grow: 1;
}

.plan-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.plan-features svg {
  width: 18px;
  height: 18px;
  fill: var(--accent-cyan);
  flex-shrink: 0;
  margin-top: 2px;
}

/* ==========================================================================
   Target Audience Section
   ========================================================================== */
.audience-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 24px;
}

.audience-card {
  background: var(--bg-metal-light);
  border: 1px solid #cbd5e1;
  border-radius: 16px;
  padding: 28px;
  box-shadow: var(--shadow-card);
  position: relative;
  transition: transform 0.2s ease;
}

.audience-card:hover {
  transform: translateY(-4px);
  border-color: #38bdf8;
}

.audience-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 14px;
}

.audience-icon {
  width: 48px;
  height: 48px;
  background: #0f172a;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid #38bdf8;
}

.audience-icon svg {
  width: 26px;
  height: 26px;
  fill: #38bdf8;
}

.audience-card h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
}

.audience-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ==========================================================================
   Clash / Clash Party Tutorial Portal Section
   ========================================================================== */
.tutorial-section {
  background: #0f172a;
  color: #f8fafc;
  border-top: 2px solid #334155;
  border-bottom: 2px solid #334155;
}

.tutorial-section .section-title {
  color: #f8fafc;
}

.tutorial-section .section-subtitle {
  color: #94a3b8;
}

.tutorial-tabs-wrapper {
  max-width: 900px;
  margin: 0 auto;
}

.tutorial-nav {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.tab-btn {
  background: #1e293b;
  color: #cbd5e1;
  border: 1px solid #334155;
  padding: 10px 22px;
  border-radius: 30px;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.tab-btn:hover {
  color: #f8fafc;
  border-color: #38bdf8;
}

.tab-btn.active {
  background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
  color: #ffffff;
  border-color: #38bdf8;
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.3);
}

.tab-pane {
  display: none;
  animation: fadeIn 0.3s ease;
}

.tab-pane.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10deg); }
  to { opacity: 1; transform: translateY(0); }
}

.steps-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}

.step-card {
  background: #1e293b;
  border: 1px solid #334155;
  border-radius: 16px;
  padding: 24px;
  position: relative;
}

.step-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.1);
  padding: 4px 10px;
  border-radius: 6px;
  display: inline-block;
  margin-bottom: 12px;
}

.step-card h4 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: #f8fafc;
  margin-bottom: 8px;
}

.step-card p {
  font-size: 0.9rem;
  color: #94a3b8;
  line-height: 1.5;
}

.tab-action-center {
  text-align: center;
}

/* ==========================================================================
   User Reviews Section
   ========================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.review-card {
  background: var(--bg-metal-light);
  border: 1px solid #cbd5e1;
  border-radius: 20px;
  padding: 28px;
  box-shadow: var(--shadow-card);
  position: relative;
}

.review-stars {
  color: #f59e0b;
  font-size: 1.2rem;
  margin-bottom: 14px;
  letter-spacing: 2px;
}

.review-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
  font-style: italic;
}

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

.user-avatar-badge {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: #0f172a;
  color: #38bdf8;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid #38bdf8;
}

.user-info h5 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.user-info p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ==========================================================================
   FAQ Section
   ========================================================================== */
.faq-container {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-metal-light);
  border: 1px solid #cbd5e1;
  border-radius: 14px;
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.faq-item.active {
  border-color: var(--accent-cyan);
}

.faq-question {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  padding: 20px 24px;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
}

.faq-icon {
  font-size: 1.4rem;
  color: var(--accent-cyan);
  transition: transform 0.3s ease;
  flex-shrink: 0;
  margin-left: 12px;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0, 1, 0, 1), padding 0.3s ease;
  padding: 0 24px;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding: 0 24px 20px 24px;
}

.faq-answer p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ==========================================================================
   Articles Catalog Grid Section
   ========================================================================== */
.articles-section {
  background: #f8fafc;
  border-top: 1px solid #e2e8f0;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 28px;
}

.article-card {
  background: #ffffff;
  border: 1px solid #cbd5e1;
  border-radius: 16px;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.05);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
}

.article-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 32px rgba(15, 23, 42, 0.1);
  border-color: #38bdf8;
}

.article-body {
  padding: 28px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.article-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-cyan);
  text-transform: uppercase;
  background: rgba(2, 132, 199, 0.1);
  padding: 3px 10px;
  border-radius: 4px;
  display: inline-block;
  margin-bottom: 12px;
  align-self: flex-start;
}

.article-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 12px;
}

.article-card h3 a {
  color: var(--text-primary);
}

.article-card h3 a:hover {
  color: var(--accent-cyan);
}

.article-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid #f1f5f9;
  padding-top: 14px;
}

/* Article Detail Page Specific Styles */
.article-container {
  max-width: 900px;
  margin: 40px auto 80px auto;
  padding: 0 24px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.breadcrumb a {
  color: var(--text-secondary);
}

.breadcrumb a:hover {
  color: var(--accent-cyan);
}

.article-header {
  margin-bottom: 36px;
  padding-bottom: 24px;
  border-bottom: 2px solid #e2e8f0;
}

.article-title-main {
  font-family: var(--font-display);
  font-size: 2.3rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.25;
  margin-bottom: 16px;
}

.article-content {
  font-size: 1.05rem;
  color: #334155;
  line-height: 1.8;
}

.article-content h2 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 36px 0 16px 0;
  padding-bottom: 8px;
  border-bottom: 1px solid #cbd5e1;
}

.article-content h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 28px 0 12px 0;
}

.article-content p {
  margin-bottom: 20px;
}

.article-content ul, .article-content ol {
  margin: 0 0 24px 24px;
}

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

.article-content blockquote {
  background: #f1f5f9;
  border-left: 4px solid var(--accent-cyan);
  padding: 16px 20px;
  border-radius: 0 12px 12px 0;
  margin: 24px 0;
  font-style: italic;
}

.article-cta-box {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  border: 2px solid #38bdf8;
  border-radius: 20px;
  padding: 36px;
  color: #f8fafc;
  text-align: center;
  margin: 48px 0;
  box-shadow: 0 15px 30px rgba(15, 23, 42, 0.2);
}

.article-cta-box h3 {
  font-size: 1.6rem;
  margin-bottom: 12px;
  color: #f8fafc;
}

.article-cta-box p {
  color: #cbd5e1;
  margin-bottom: 24px;
}

/* ==========================================================================
   Footer Component
   ========================================================================== */
.site-footer {
  background: #0f172a;
  color: #cbd5e1;
  border-top: 2px solid #334155;
  padding: 64px 0 32px 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand h3 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 800;
  color: #f8fafc;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.footer-brand h3 svg {
  width: 24px;
  height: 24px;
  fill: #38bdf8;
}

.footer-brand p {
  font-size: 0.9rem;
  color: #94a3b8;
  line-height: 1.6;
}

.footer-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: #f8fafc;
  margin-bottom: 20px;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: #94a3b8;
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: #38bdf8;
}

.footer-bottom {
  border-top: 1px solid #1e293b;
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: #64748b;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-legal-links {
  display: flex;
  gap: 20px;
}

.footer-legal-links a {
  color: #64748b;
}

.footer-legal-links a:hover {
  color: #cbd5e1;
}

/* ==========================================================================
   Responsive Queries
   ========================================================================== */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-title {
    font-size: 2.2rem;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #0f172a;
    border-bottom: 1px solid #334155;
    flex-direction: column;
    padding: 20px;
  }
  
  .nav-menu.active {
    display: flex;
  }

  .mobile-toggle {
    display: block;
  }

  .streamliner-container-box {
    padding: 24px;
    border-radius: 20px;
  }

  .hero-title {
    font-size: 1.8rem;
  }

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

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

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}