/* ==========================================================================
   GLaDOS Network (gladojc.cyou) - Native Core Stylesheet
   Pure CSS3 - Ultra Lightweight - Zero Bloat - Fast Loading
   ========================================================================== */

:root {
  --bg-primary: #0a0e17;
  --bg-secondary: #0f172a;
  --bg-tertiary: #162036;
  --bg-card: rgba(18, 28, 48, 0.72);
  --bg-card-hover: rgba(24, 38, 66, 0.88);
  --bg-glass: rgba(255, 255, 255, 0.04);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(24, 144, 255, 0.45);
  --primary: #1890ff;
  --primary-hover: #40a9ff;
  --primary-glow: rgba(24, 144, 255, 0.35);
  --accent-cyan: #00f0ff;
  --accent-green: #10b981;
  --accent-amber: #f59e0b;
  --accent-purple: #8b5cf6;
  --text-main: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-pill: 9999px;
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 25px rgba(24, 144, 255, 0.35);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

.site-wrapper {
  position: relative;
  z-index: 1;
  width: 100%;
}

/* Layout Container */
.container {
  width: 100%;
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* Typography & Links */
a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.25;
  color: #ffffff;
}

/* Section Header Utility */
.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 52px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(24, 144, 255, 0.12);
  border: 1px solid rgba(24, 144, 255, 0.3);
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-cyan);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.section-title {
  font-size: 2.25rem;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
}

.section-title span {
  background: linear-gradient(135deg, #ffffff 30%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(10, 14, 23, 0.85);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}

.brand-logo img {
  height: 38px;
  width: auto;
  object-fit: contain;
  display: block;
}

.brand-text {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: #ffffff;
}

.brand-text span {
  color: var(--primary);
  font-weight: 700;
}

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

.nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 6px 0;
}

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

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

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* CTA Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  font-size: 14.5px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #1890ff 0%, #0070e0 100%);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(24, 144, 255, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #40a9ff 0%, #1890ff 100%);
  box-shadow: 0 6px 20px rgba(24, 144, 255, 0.5);
  transform: translateY(-2px);
  color: #ffffff;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--border-color);
  color: var(--text-main);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--border-focus);
  color: #ffffff;
  transform: translateY(-2px);
}

.btn-lg {
  padding: 14px 32px;
  font-size: 16px;
  border-radius: var(--radius-md);
}

.btn-glow {
  position: relative;
  overflow: hidden;
}

.btn-glow::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, transparent, rgba(255,255,255,0.2), transparent);
  transform: rotate(45deg);
  animation: btnGlow 3.5s infinite;
}

@keyframes btnGlow {
  0% { transform: translateX(-100%) rotate(45deg); }
  30%, 100% { transform: translateX(100%) rotate(45deg); }
}

.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  color: #ffffff;
  cursor: pointer;
  padding: 6px;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  padding: 90px 0 70px;
  position: relative;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px;
  background: rgba(24, 144, 255, 0.1);
  border: 1px solid rgba(24, 144, 255, 0.3);
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-cyan);
  margin-bottom: 28px;
}

.hero-badge .pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 10px var(--accent-green);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: 0.6; }
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: -1.2px;
  line-height: 1.18;
  max-width: 980px;
  margin: 0 auto 24px;
}

.hero-title .gradient-text {
  background: linear-gradient(135deg, #ffffff 10%, #60a5fa 50%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline;
}

.hero-desc {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 820px;
  margin: 0 auto 38px;
  line-height: 1.7;
}

/* Hero Introduction Essay / Features Block */
.hero-intro-card {
  max-width: 980px;
  margin: 0 auto 40px;
  background: rgba(18, 28, 48, 0.72);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(24, 144, 255, 0.28);
  border-radius: var(--radius-lg);
  padding: 30px 34px;
  box-shadow: 0 14px 40px -10px rgba(0, 0, 0, 0.55), 0 0 20px rgba(24, 144, 255, 0.1);
  text-align: left;
}

.hero-intro-lead {
  font-size: 1.08rem;
  line-height: 1.8;
  color: #e2e8f0;
  margin-bottom: 22px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.hero-intro-lead strong {
  color: #ffffff;
}

.hero-intro-specs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.intro-spec-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  transition: var(--transition);
}

.intro-spec-item:hover {
  background: rgba(24, 144, 255, 0.08);
  border-color: rgba(24, 144, 255, 0.35);
  transform: translateY(-2px);
}

.intro-spec-title {
  display: flex;
  align-items: center;
  gap: 8px;
}

.intro-spec-title .intro-icon {
  font-size: 1.15rem;
  line-height: 1;
}

.intro-spec-title h4 {
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--accent-cyan);
}

.intro-spec-item p {
  font-size: 13.5px;
  line-height: 1.62;
  color: var(--text-secondary);
}

.intro-spec-item p strong {
  color: #ffffff;
}

@media (max-width: 820px) {
  .hero-intro-specs {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .hero-intro-card {
    padding: 22px 18px;
  }
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 56px;
  flex-wrap: wrap;
}

.hero-guarantee {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  font-size: 13.5px;
  color: var(--text-muted);
  margin-top: 14px;
}

.hero-guarantee span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* Hero Stats Bar */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  padding: 30px 36px;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  margin-top: 20px;
}

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

.stat-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: -10px;
  top: 15%;
  height: 70%;
  width: 1px;
  background: var(--border-color);
}

.stat-num {
  font-size: 2.2rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.5px;
}

.stat-num span {
  color: var(--primary);
  font-size: 1.4rem;
}

.stat-label {
  font-size: 13.5px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ==========================================================================
   Features Section
   ========================================================================== */
.features-section {
  padding: 90px 0;
  position: relative;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.feature-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px 26px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-focus);
  box-shadow: 0 12px 30px rgba(24, 144, 255, 0.15);
  background: var(--bg-card-hover);
}

.feature-icon-wrap {
  width: 54px;
  height: 54px;
  border-radius: 12px;
  background: rgba(24, 144, 255, 0.12);
  border: 1px solid rgba(24, 144, 255, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  font-size: 24px;
  margin-bottom: 22px;
}

.feature-title {
  font-size: 1.3rem;
  margin-bottom: 12px;
}

.feature-desc {
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ==========================================================================
   PRICING SECTION - ALL PRICES IN SAME ROW ("所有价格要同排")
   ========================================================================== */
.pricing-section {
  padding: 90px 0;
  position: relative;
  background: linear-gradient(180deg, transparent 0%, rgba(15, 23, 42, 0.45) 50%, transparent 100%);
}

/* Billing Cycle Selector Tabs */
.cycle-selector {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 6px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-pill);
  max-width: 580px;
  margin: 0 auto 48px;
  position: relative;
}

.cycle-btn {
  flex: 1;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  background: transparent;
  border: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  white-space: nowrap;
}

.cycle-btn:hover {
  color: #ffffff;
}

.cycle-btn.active {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(24, 144, 255, 0.4);
}

.cycle-badge {
  font-size: 11px;
  padding: 2px 7px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.2);
  color: #ffffff;
}

.cycle-btn.active .cycle-badge {
  background: rgba(0, 0, 0, 0.25);
  color: #ffffff;
}

/* Pricing Grid - STRICTLY IN ONE ROW ON DESKTOP */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 38px 30px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition);
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-focus);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.6);
}

.pricing-card.featured {
  background: linear-gradient(180deg, rgba(24, 144, 255, 0.12) 0%, rgba(18, 28, 48, 0.88) 100%);
  border: 2px solid var(--primary);
  box-shadow: 0 12px 35px rgba(24, 144, 255, 0.25);
  transform: scale(1.02);
}

.pricing-card.featured:hover {
  transform: scale(1.02) translateY(-6px);
  box-shadow: 0 18px 45px rgba(24, 144, 255, 0.35);
}

.popular-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, #1890ff, #00d2ff);
  color: #ffffff;
  padding: 5px 18px;
  border-radius: var(--radius-pill);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 12px rgba(24, 144, 255, 0.5);
  white-space: nowrap;
}

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

.plan-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.pricing-card.featured .plan-badge {
  background: rgba(24, 144, 255, 0.2);
  color: var(--accent-cyan);
}

.plan-name {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 6px;
}

.plan-audience {
  font-size: 13.5px;
  color: var(--text-secondary);
  min-height: 40px;
  line-height: 1.5;
}

.plan-pricing-box {
  margin: 20px 0 24px;
  padding: 18px;
  background: rgba(0, 0, 0, 0.25);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.plan-price-row {
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.currency {
  font-size: 1.4rem;
  font-weight: 700;
  color: #ffffff;
}

.price-val {
  font-size: 3rem;
  font-weight: 900;
  color: #ffffff;
  letter-spacing: -1px;
  line-height: 1;
}

.period {
  font-size: 14px;
  color: var(--text-secondary);
  margin-left: 4px;
}

.price-subtext {
  font-size: 13px;
  color: var(--accent-green);
  margin-top: 6px;
  font-weight: 500;
}

/* Plan Specs Specs List */
.plan-specs {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.spec-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13.5px;
}

.spec-key {
  color: var(--text-secondary);
}

.spec-val {
  color: #ffffff;
  font-weight: 600;
}

/* Feature checklist */
.plan-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 30px;
  flex-grow: 1;
}

.plan-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.plan-features li svg {
  flex-shrink: 0;
  width: 17px;
  height: 17px;
  color: var(--accent-cyan);
  margin-top: 2px;
}

.plan-cta {
  width: 100%;
  margin-top: auto;
}

/* Extra Plans Showcase (Edu & Check-in) */
.extra-benefits-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.benefit-card {
  background: var(--bg-card);
  border: 1px dashed rgba(24, 144, 255, 0.4);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.benefit-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(24, 144, 255, 0.15);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  flex-shrink: 0;
}

.benefit-title {
  font-size: 1.15rem;
  margin-bottom: 4px;
}

.benefit-desc {
  font-size: 13.5px;
  color: var(--text-secondary);
}

.pricing-note {
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 28px;
}

/* ==========================================================================
   Nodes & Protocol Matrix
   ========================================================================== */
.nodes-section {
  padding: 90px 0;
}

.nodes-matrix {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}

.node-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 22px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: var(--transition);
}

.node-box:hover {
  border-color: var(--border-focus);
  transform: translateY(-3px);
  background: var(--bg-card-hover);
}

.node-flag {
  font-size: 2rem;
  line-height: 1;
}

.node-info h4 {
  font-size: 15px;
  margin-bottom: 4px;
}

.node-info p {
  font-size: 12.5px;
  color: var(--text-muted);
}

.node-ping {
  margin-left: auto;
  font-size: 12px;
  font-weight: 700;
  color: var(--accent-green);
  background: rgba(16, 185, 129, 0.12);
  padding: 3px 8px;
  border-radius: var(--radius-pill);
}

/* ==========================================================================
   Articles / Knowledge Base Grid Section
   ========================================================================== */
.articles-section {
  padding: 90px 0;
  position: relative;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.article-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-focus);
  box-shadow: 0 14px 32px rgba(0,0,0,0.45);
}

.article-card-thumb {
  height: 180px;
  position: relative;
  background: linear-gradient(135deg, #0d1b2a, #1b263b);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  border-bottom: 1px solid var(--border-color);
}

.article-tag-pill {
  position: absolute;
  top: 14px;
  left: 14px;
  font-size: 11px;
  font-weight: 600;
  color: #ffffff;
  background: var(--primary);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
}

.article-thumb-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #e0e1dd;
  text-align: center;
  line-height: 1.35;
}

.article-card-body {
  padding: 24px 22px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.article-title {
  font-size: 1.15rem;
  margin-bottom: 10px;
  line-height: 1.4;
  color: #ffffff;
}

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

.article-snippet {
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 18px;
  flex-grow: 1;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-muted);
  border-top: 1px solid var(--border-color);
  padding-top: 14px;
}

.read-more-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-weight: 600;
  color: var(--accent-cyan);
}

.read-more-link:hover {
  color: #ffffff;
  transform: translateX(3px);
}

/* ==========================================================================
   User Testimonials Section
   ========================================================================== */
.testimonials-section {
  padding: 90px 0;
  position: relative;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.testimonial-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 30px 26px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.testimonial-card:hover {
  border-color: var(--border-focus);
  transform: translateY(-4px);
  background: var(--bg-card-hover);
}

.stars-row {
  display: flex;
  gap: 4px;
  color: #fbbf24;
  font-size: 16px;
  margin-bottom: 16px;
}

.testimonial-content {
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 22px;
  flex-grow: 1;
  font-style: italic;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 14px;
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
}

.user-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent-cyan));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #ffffff;
  font-size: 16px;
}

.user-meta h4 {
  font-size: 14.5px;
  margin-bottom: 2px;
}

.user-meta p {
  font-size: 12.5px;
  color: var(--text-muted);
}

/* ==========================================================================
   FAQ Section (Accordion)
   ========================================================================== */
.faq-section {
  padding: 90px 0;
  position: relative;
}

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

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

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

.faq-question {
  width: 100%;
  padding: 22px 26px;
  background: transparent;
  border: none;
  color: #ffffff;
  font-size: 16px;
  font-weight: 600;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  gap: 16px;
}

.faq-icon {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s ease;
  flex-shrink: 0;
  font-size: 18px;
  line-height: 1;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  background: var(--primary);
  color: #ffffff;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 26px;
  color: var(--text-secondary);
  font-size: 14.5px;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 400px;
  padding: 0 26px 22px;
}

/* ==========================================================================
   CTA Banner Section
   ========================================================================== */
.cta-banner-section {
  padding: 70px 0 100px;
}

.cta-banner {
  background: linear-gradient(135deg, rgba(24, 144, 255, 0.2) 0%, rgba(15, 23, 42, 0.9) 100%);
  border: 1px solid rgba(24, 144, 255, 0.35);
  border-radius: var(--radius-lg);
  padding: 56px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-glow);
}

.cta-banner h2 {
  font-size: 2.4rem;
  margin-bottom: 16px;
}

.cta-banner p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 32px;
}

.cta-banner-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: rgba(8, 12, 20, 0.95);
  border-top: 1px solid var(--border-color);
  padding: 70px 0 30px;
  font-size: 14px;
  color: var(--text-secondary);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand p {
  margin-top: 14px;
  line-height: 1.6;
  color: var(--text-muted);
  max-width: 320px;
}

.footer-col h4 {
  font-size: 15px;
  color: #ffffff;
  margin-bottom: 18px;
}

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

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

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-color);
  padding-top: 26px;
  font-size: 13px;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 16px;
}

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

/* Floating Back To Top */
.back-to-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 90;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--primary);
  border-color: var(--primary);
  transform: translateY(-3px);
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1080px) {
  .hero-title {
    font-size: 2.8rem;
  }
  .pricing-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }
  .pricing-card {
    padding: 28px 20px;
  }
  .features-grid, .articles-grid, .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .nodes-matrix {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 820px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(10, 14, 23, 0.98);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: 24px;
    flex-direction: column;
    gap: 18px;
  }
  .nav-menu.open {
    display: flex;
  }
  .mobile-toggle {
    display: block;
  }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
  .stat-item:not(:last-child)::after {
    display: none;
  }
  /* Pricing cards still neatly arranged */
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 460px;
    margin: 0 auto;
  }
  .pricing-card.featured {
    transform: none;
  }
  .pricing-card.featured:hover {
    transform: translateY(-6px);
  }
  .extra-benefits-grid {
    grid-template-columns: 1fr;
  }
  .features-grid, .articles-grid, .testimonials-grid {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 480px) {
  .brand-logo img {
    height: 32px;
  }
  .hero-title {
    font-size: 2.1rem;
  }
  .hero-desc {
    font-size: 1rem;
  }
  .section-title {
    font-size: 1.75rem;
  }
  .hero-stats {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
}