/* ==========================================================================
   一云梯机场 (yiyuntijic.homes) - VisionOS Spatial Lens Glassmorphism CSS Design System
   Visual Core: Thick Acrylic Floating Staircase, Subsurface Scattering, Cloud Fog Lightfield
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=Noto+Sans+SC:wght@300;400;500;700;900&family=Fira+Code:wght@400;500&display=swap');

:root {
  /* Core Colors */
  --bg-dark: #050811;
  --bg-deep: #080d1a;
  --bg-card: rgba(18, 26, 47, 0.55);
  --bg-card-hover: rgba(28, 39, 68, 0.75);
  
  /* Spatial & Refraction Accent Tokens */
  --accent-cyan: #00f2fe;
  --accent-blue: #4facfe;
  --accent-purple: #7f53ac;
  --accent-gold: #ffb703;
  --subsurface-glow: rgba(255, 255, 255, 0.95);
  --subsurface-border: rgba(255, 255, 255, 0.18);
  
  /* Text Palette */
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  /* Glassmorphism Specs */
  --acrylic-blur: blur(28px) saturate(200%);
  --acrylic-radius: 20px;
  --acrylic-shadow: 0 20px 50px rgba(0, 0, 0, 0.5), inset 0 1px 1px rgba(255, 255, 255, 0.3);
  --card-border: 1px solid rgba(255, 255, 255, 0.12);
  --card-border-glow: 1px solid rgba(0, 242, 254, 0.4);

  /* Fonts */
  --font-sans: 'Noto Sans SC', 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'Fira Code', monospace;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

body {
  min-height: 100vh;
  line-height: 1.6;
  background: radial-gradient(circle at 50% 0%, #101c38 0%, #050811 70%);
  background-attachment: fixed;
  position: relative;
}

/* Background Atmosphere Glows */
.cloud-fog-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.cloud-light-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.25;
  animation: floatOrb 18s ease-in-out infinite alternate;
}

.orb-1 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-cyan), transparent);
  top: -100px;
  left: 20%;
}

.orb-2 {
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, var(--accent-purple), transparent);
  top: 300px;
  right: -150px;
  animation-delay: -5s;
}

.orb-3 {
  width: 550px;
  height: 550px;
  background: radial-gradient(circle, #3a7bd5, transparent);
  bottom: 100px;
  left: -100px;
  animation-delay: -10s;
}

@keyframes floatOrb {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(40px, 60px) scale(1.1); }
  100% { transform: translate(-30px, 30px) scale(0.95); }
}

/* Typography & General Classes */
a {
  color: inherit;
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 2;
}

.section-title-wrap {
  text-align: center;
  margin-bottom: 56px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid rgba(0, 242, 254, 0.25);
  border-radius: 30px;
  color: var(--accent-cyan);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: 16px;
  backdrop-filter: blur(10px);
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.5px;
  line-height: 1.25;
}

.section-subtitle {
  margin-top: 12px;
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 32px;
  background: linear-gradient(135deg, #00c6ff 0%, #0072ff 100%);
  color: #ffffff;
  font-weight: 700;
  font-size: 1rem;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  box-shadow: 0 10px 30px rgba(0, 114, 255, 0.35), inset 0 1px 1px rgba(255, 255, 255, 0.5);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, transparent, rgba(255,255,255,0.25), transparent);
  transform: rotate(45deg) translateY(-100%);
  transition: transform 0.6s ease;
}

.btn-primary:hover::before {
  transform: rotate(45deg) translateY(100%);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 15px 35px rgba(0, 114, 255, 0.5), inset 0 1px 1px rgba(255, 255, 255, 0.8);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 32px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  font-weight: 600;
  font-size: 1rem;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(16px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}

/* ==========================================================================
   Header Navbar
   ========================================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 16px 0;
  transition: all 0.4s ease;
}

.navbar.scrolled {
  padding: 12px 0;
  background: rgba(5, 8, 17, 0.75);
  backdrop-filter: var(--acrylic-blur);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.35rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.5px;
}

.logo-icon-wrap {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(0,242,254,0.2), rgba(79,172,254,0.1));
  border: 1px solid rgba(0, 242, 254, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 15px rgba(0, 242, 254, 0.2);
}

.logo-icon-wrap svg {
  width: 22px;
  height: 22px;
  fill: var(--accent-cyan);
}

.logo-text span {
  background: linear-gradient(90deg, #ffffff, var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: 500;
}

.nav-links a:hover, .nav-links a.active {
  color: var(--accent-cyan);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 16px;
}

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

/* ==========================================================================
   Hero Section (VisionOS Spatial Acrylic Floating Staircase)
   ========================================================================== */
.hero-section {
  padding-top: 160px;
  padding-bottom: 100px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 40px;
  color: #e2e8f0;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 24px;
  backdrop-filter: blur(12px);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.2);
}

.hero-badge .pulse-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-cyan);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--accent-cyan);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 242, 254, 0.7); }
  70% { transform: scale(1.1); box-shadow: 0 0 0 10px rgba(0, 242, 254, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 242, 254, 0); }
}

.hero-title {
  font-size: 3.25rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1px;
  color: #ffffff;
  margin-bottom: 20px;
}

.hero-title .gradient-text {
  background: linear-gradient(135deg, #ffffff 20%, var(--accent-cyan) 60%, var(--accent-blue) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 40px;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 40px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-num {
  font-size: 1.6rem;
  font-weight: 800;
  color: #fff;
}

.stat-num span {
  color: var(--accent-cyan);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* Spatial Lens Acrylic Floating Staircase Visual Component */
.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 480px;
}

.acrylic-staircase-container {
  width: 100%;
  height: 460px;
  position: relative;
  perspective: 1200px;
}

.acrylic-lens-frame {
  width: 100%;
  height: 100%;
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.02);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.6),
              inset 0 1px 2px rgba(255, 255, 255, 0.4),
              0 0 40px rgba(0, 242, 254, 0.15);
  padding: 30px;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.spatial-fog-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 60% 40%, rgba(0, 242, 254, 0.15), transparent 70%),
              radial-gradient(circle at 20% 80%, rgba(127, 83, 172, 0.15), transparent 60%);
  pointer-events: none;
}

.acrylic-ladder-group {
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: relative;
  z-index: 3;
  transform: rotateX(15deg) rotateY(-10deg) rotateZ(2deg);
  transform-style: preserve-3d;
  transition: transform 0.6s ease-out;
}

.hero-visual:hover .acrylic-ladder-group {
  transform: rotateX(8deg) rotateY(-4deg) rotateZ(0deg) scale(1.02);
}

.acrylic-step {
  height: 64px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 16px;
  backdrop-filter: blur(30px) saturate(220%);
  border: 1px solid rgba(255, 255, 255, 0.25);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4),
              inset 0 2px 4px rgba(255, 255, 255, 0.6),
              0 0 20px rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  color: #fff;
  transition: all 0.4s ease;
  position: relative;
}

.acrylic-step::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 10%;
  width: 80%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
  opacity: 0.6;
}

.step-1 { transform: translateZ(60px); margin-left: 0%; width: 100%; }
.step-2 { transform: translateZ(40px); margin-left: 6%; width: 94%; }
.step-3 { transform: translateZ(20px); margin-left: 12%; width: 88%; }
.step-4 { transform: translateZ(0px); margin-left: 18%; width: 82%; }

.step-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.step-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: rgba(0, 242, 254, 0.15);
  border: 1px solid rgba(0, 242, 254, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
}

.step-text {
  font-weight: 700;
  font-size: 1.05rem;
}

.step-tag {
  font-size: 0.8rem;
  padding: 4px 12px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--accent-cyan);
  font-family: var(--font-mono);
}

/* Floating Vision Badge overlay */
.floating-glass-badge {
  position: absolute;
  bottom: 20px;
  right: 20px;
  padding: 12px 20px;
  border-radius: 16px;
  background: rgba(10, 16, 32, 0.85);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
  z-index: 10;
}

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

.badge-info {
  display: flex;
  flex-direction: column;
}

.badge-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: #fff;
}

.badge-sub {
  font-size: 0.75rem;
  color: var(--text-dim);
}

/* ==========================================================================
   Core Advantages Section
   ========================================================================== */
.advantages-section {
  padding: 100px 0;
  position: relative;
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.advantage-card {
  background: var(--bg-card);
  border-radius: var(--acrylic-radius);
  padding: 36px 28px;
  border: var(--card-border);
  backdrop-filter: var(--acrylic-blur);
  box-shadow: var(--acrylic-shadow);
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}

.advantage-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.advantage-card:hover {
  transform: translateY(-8px);
  background: var(--bg-card-hover);
  border-color: rgba(0, 242, 254, 0.3);
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.6), 0 0 30px rgba(0, 242, 254, 0.15);
}

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

.adv-icon {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(0,242,254,0.15), rgba(79,172,254,0.05));
  border: 1px solid rgba(0, 242, 254, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--accent-cyan);
}

.adv-icon svg {
  width: 30px;
  height: 30px;
}

.adv-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}

.adv-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   Pricing Section (Matching User Reference Image Exactly)
   ========================================================================== */
.pricing-section {
  padding: 100px 0;
  position: relative;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  align-items: stretch;
}

/* Base Card Styling Matching Image Template */
.pricing-card {
  background: #0f172a;
  background: linear-gradient(180deg, #131b2e 0%, #0a101d 100%);
  border-radius: 24px;
  padding: 36px 32px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: all 0.4s ease;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.pricing-card.recommended {
  background: linear-gradient(180deg, #162444 0%, #0c162b 100%);
  border: 1px solid rgba(0, 242, 254, 0.4);
  box-shadow: 0 25px 50px rgba(0, 242, 254, 0.15), inset 0 1px 2px rgba(255, 255, 255, 0.2);
  transform: translateY(-6px);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.plan-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: #ffffff;
}

/* Badges matching reference image */
.badge-pill {
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
}

.badge-pill.entry {
  background: rgba(255, 255, 255, 0.12);
  color: #cbd5e1;
}

.badge-pill.featured {
  background: #e6a23c;
  color: #000;
  font-weight: 700;
}

.badge-pill.advanced {
  background: rgba(255, 255, 255, 0.12);
  color: #cbd5e1;
}

/* Price Display */
.price-wrap {
  margin-bottom: 16px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.price-currency {
  font-size: 1.75rem;
  font-weight: 800;
  color: #ffffff;
}

.price-amount {
  font-size: 2.75rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -1px;
}

.price-period {
  font-size: 1rem;
  color: var(--text-dim);
  font-weight: 500;
}

.plan-subtitle {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 32px;
  min-height: 44px;
}

/* Feature List with Cyan Checks */
.plan-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 40px;
}

.plan-features li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
  color: #e2e8f0;
}

.feature-check {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #00f2fe;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #050811;
  font-weight: bold;
  font-size: 12px;
  flex-shrink: 0;
}

/* Pricing Action Buttons matching reference image */
.btn-select-outline {
  width: 100%;
  padding: 14px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.4);
  background: transparent;
  color: #ffffff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
  transition: all 0.3s ease;
}

.btn-select-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #ffffff;
}

.btn-select-gradient {
  width: 100%;
  padding: 14px;
  border-radius: 10px;
  border: none;
  background: linear-gradient(90deg, #6366f1 0%, #00f2fe 100%);
  color: #ffffff;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  text-align: center;
  box-shadow: 0 8px 25px rgba(0, 242, 254, 0.3);
  transition: all 0.3s ease;
}

.btn-select-gradient:hover {
  opacity: 0.95;
  box-shadow: 0 12px 30px rgba(0, 242, 254, 0.5);
  transform: translateY(-2px);
}

/* ==========================================================================
   Target Audience Section (适合人群)
   ========================================================================== */
.audience-section {
  padding: 80px 0;
}

.audience-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.audience-card {
  background: rgba(255, 255, 255, 0.03);
  border-radius: 18px;
  padding: 28px 24px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(16px);
  text-align: center;
  transition: all 0.3s ease;
}

.audience-card:hover {
  transform: translateY(-6px);
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(0, 242, 254, 0.3);
}

.audience-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: rgba(0, 242, 254, 0.1);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px auto;
  font-size: 1.5rem;
}

.audience-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

.audience-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Tutorial Hub Section (Clash / Clash Party Setup)
   ========================================================================== */
.tutorial-section {
  padding: 100px 0;
  position: relative;
}

.tutorial-tabs-header {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 12px 24px;
  border-radius: 30px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.3s ease;
  backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  gap: 8px;
}

.tab-btn.active, .tab-btn:hover {
  background: rgba(0, 242, 254, 0.15);
  border-color: var(--accent-cyan);
  color: #ffffff;
}

.tutorial-content-panel {
  background: var(--bg-card);
  border-radius: 24px;
  padding: 40px;
  border: var(--card-border);
  backdrop-filter: var(--acrylic-blur);
  box-shadow: var(--acrylic-shadow);
  display: none;
}

.tutorial-content-panel.active {
  display: block;
  animation: fadeIn 0.4s ease;
}

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

.tutorial-steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.step-card {
  background: rgba(255, 255, 255, 0.03);
  border-radius: 16px;
  padding: 28px 24px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  position: relative;
}

.step-number {
  font-size: 2.5rem;
  font-weight: 900;
  color: rgba(0, 242, 254, 0.25);
  position: absolute;
  top: 16px;
  right: 20px;
  font-family: var(--font-mono);
}

.step-heading {
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}

.step-body {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Code Snippet Copy Box */
.code-copy-box {
  margin-top: 16px;
  background: #090e1a;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-cyan);
}

.copy-btn {
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: #fff;
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 0.75rem;
  cursor: pointer;
}

.copy-btn:hover {
  background: var(--accent-cyan);
  color: #000;
}

/* ==========================================================================
   Reviews / User Testimonials
   ========================================================================== */
.reviews-section {
  padding: 80px 0;
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.review-card {
  background: var(--bg-card);
  border-radius: 20px;
  padding: 32px 28px;
  border: var(--card-border);
  backdrop-filter: var(--acrylic-blur);
}

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

.user-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, #00f2fe, #4facfe);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  color: #000;
}

.user-meta h4 {
  font-size: 1rem;
  color: #fff;
}

.user-meta span {
  font-size: 0.8rem;
  color: var(--text-dim);
}

.stars {
  color: #f59e0b;
  margin-bottom: 12px;
  font-size: 0.9rem;
}

.review-text {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   FAQ Section
   ========================================================================== */
.faq-section {
  padding: 100px 0;
}

.faq-accordion {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: rgba(255, 255, 255, 0.03);
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  overflow: hidden;
  transition: all 0.3s ease;
}

.faq-item.active {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(0, 242, 254, 0.3);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.faq-question {
  padding: 22px 28px;
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
}

.faq-icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s ease;
  color: var(--accent-cyan);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0, 1, 0, 1);
  padding: 0 28px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding-bottom: 24px;
  transition: max-height 0.4s ease-in-out;
}

/* ==========================================================================
   Articles Grid / Directory Component
   ========================================================================== */
.articles-section {
  padding: 100px 0;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.article-card {
  background: var(--bg-card);
  border-radius: 20px;
  border: var(--card-border);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
}

.article-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 242, 254, 0.3);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

.article-cover-wrap {
  height: 180px;
  background: linear-gradient(135deg, #1e293b, #0f172a);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.article-cover-wrap svg {
  width: 64px;
  height: 64px;
  opacity: 0.4;
  color: var(--accent-cyan);
}

.article-tag-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  padding: 4px 12px;
  border-radius: 20px;
  background: rgba(5, 8, 17, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--accent-cyan);
  font-size: 0.75rem;
  font-weight: 600;
}

.article-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.article-meta {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.article-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
  line-height: 1.4;
}

.article-summary {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-read-more {
  color: var(--accent-cyan);
  font-size: 0.9rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.article-read-more:hover {
  gap: 10px;
}

/* ==========================================================================
   Article Detail Page Layout Styling
   ========================================================================== */
.article-page-header {
  padding-top: 160px;
  padding-bottom: 60px;
  background: radial-gradient(circle at 50% 0%, rgba(0, 242, 254, 0.1), transparent 70%);
}

.breadcrumb-trail {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-dim);
  margin-bottom: 20px;
}

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

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

.article-h1-title {
  font-size: 2.5rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.25;
  margin-bottom: 20px;
}

.article-page-meta {
  display: flex;
  align-items: center;
  gap: 24px;
  color: var(--text-muted);
  font-size: 0.9rem;
  padding-bottom: 30px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.article-main-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 48px;
  padding: 60px 0 100px 0;
}

.article-content-body {
  color: #cbd5e1;
  font-size: 1.05rem;
  line-height: 1.85;
}

.article-content-body h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: #ffffff;
  margin-top: 44px;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-content-body h2::before {
  content: '';
  width: 4px;
  height: 24px;
  background: var(--accent-cyan);
  border-radius: 2px;
}

.article-content-body h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: #e2e8f0;
  margin-top: 28px;
  margin-bottom: 14px;
}

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

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

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

.article-callout-box {
  background: rgba(0, 242, 254, 0.05);
  border-left: 4px solid var(--accent-cyan);
  padding: 20px 24px;
  border-radius: 0 12px 12px 0;
  margin: 30px 0;
  color: #e2e8f0;
}

.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.sidebar-widget {
  background: var(--bg-card);
  border-radius: 20px;
  padding: 28px;
  border: var(--card-border);
}

.widget-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-cta-box {
  background: linear-gradient(135deg, rgba(0, 242, 254, 0.15), rgba(79, 172, 254, 0.05));
  border: 1px solid rgba(0, 242, 254, 0.3);
  border-radius: 20px;
  padding: 28px;
  text-align: center;
}

.sidebar-cta-box h3 {
  font-size: 1.2rem;
  color: #fff;
  margin-bottom: 12px;
}

.sidebar-cta-box p {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

/* ==========================================================================
   Footer Component
   ========================================================================== */
.footer {
  background: #03050b;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 80px 0 40px 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 48px;
  margin-bottom: 60px;
}

.footer-brand p {
  color: var(--text-dim);
  font-size: 0.9rem;
  margin-top: 16px;
  line-height: 1.6;
}

.footer-column h4 {
  font-size: 1rem;
  color: #fff;
  margin-bottom: 20px;
}

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

.footer-links a {
  font-size: 0.9rem;
  color: var(--text-muted);
}

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

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; text-align: center; }
  .hero-actions { justify-content: center; }
  .hero-stats { justify-content: center; }
  .advantages-grid, .pricing-grid, .reviews-grid, .articles-grid { grid-template-columns: repeat(2, 1fr); }
  .audience-grid { grid-template-columns: repeat(2, 1fr); }
  .tutorial-steps-grid { grid-template-columns: 1fr; }
  .article-main-layout { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .mobile-menu-btn { display: block; }
  .hero-title { font-size: 2.25rem; }
  .advantages-grid, .pricing-grid, .reviews-grid, .articles-grid, .audience-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 16px; text-align: center; }
}