/* ==========================================================================
   Mitce VPN - Official Stylesheet (Nordic Ceramic Minimalism)
   Aesthetic: Architectural Tech, Porcelain Canvas, Hairline Dividers, Icy Blue Accent
   Zero external dependencies, Pure Native CSS
   ========================================================================== */

/* --- CSS Variables & Design Tokens --- */
:root {
  /* Day / Pristine White Mode (Default) */
  --bg-primary: #f8fafc;           /* Porcelain white canvas */
  --bg-secondary: #f1f5f9;         /* Subtle cool ceramic tone */
  --bg-tertiary: #e2e8f0;          /* Hairline background */
  --bg-card: rgba(255, 255, 255, 0.85); /* Frosted acrylic porcelain */
  --bg-card-solid: #ffffff;
  --bg-acrylic: rgba(255, 255, 255, 0.72);
  --bg-glass-nav: rgba(248, 250, 252, 0.82);
  
  --border-color: rgba(226, 232, 240, 0.9);   /* Hairline divider */
  --border-subtle: rgba(241, 245, 249, 0.95);
  --border-focus: #0284c7;                    /* Icy sky-blue */
  --border-accent: rgba(2, 132, 199, 0.28);
  
  --text-primary: #0f172a;         /* Deep navy typography */
  --text-secondary: #334155;       /* Refined slate */
  --text-muted: #64748b;           /* Hairline caption slate */
  --text-light: #94a3b8;
  
  --brand-primary: #0284c7;        /* Icy sky-blue */
  --brand-primary-hover: #0369a1;
  --brand-dark: #0f172a;
  --brand-glow: rgba(2, 132, 199, 0.2);
  --brand-gradient: linear-gradient(135deg, #0284c7 0%, #0ea5e9 100%);
  --brand-gradient-hover: linear-gradient(135deg, #0369a1 0%, #0284c7 100%);
  
  --accent-emerald: #10b981;       /* Connected state green */
  --accent-emerald-glow: rgba(16, 185, 129, 0.25);
  --accent-slate: #1e293b;
  
  --card-shadow: 0 4px 24px -2px rgba(15, 23, 42, 0.04), 0 2px 8px -1px rgba(15, 23, 42, 0.02);
  --card-shadow-hover: 0 20px 35px -10px rgba(2, 132, 199, 0.1), 0 8px 16px -4px rgba(15, 23, 42, 0.03);
  --header-shadow: 0 1px 0 rgba(226, 232, 240, 0.8);
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;
  
  --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 0.15s ease;
  --transition-bounce: 0.45s cubic-bezier(0.34, 1.56, 0.64, 1);
}

[data-theme="dark"] {
  /* Night / Architectural Obsidian Mode */
  --bg-primary: #090d16;
  --bg-secondary: #0f172a;
  --bg-tertiary: #162035;
  --bg-card: rgba(18, 28, 50, 0.75);
  --bg-card-solid: #121c32;
  --bg-acrylic: rgba(18, 28, 50, 0.65);
  --bg-glass-nav: rgba(9, 13, 22, 0.85);
  
  --border-color: rgba(36, 50, 76, 0.75);
  --border-subtle: rgba(22, 34, 56, 0.8);
  --border-focus: #38bdf8;
  --border-accent: rgba(56, 189, 248, 0.3);
  
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-light: #64748b;
  
  --brand-primary: #38bdf8;
  --brand-primary-hover: #7dd3fc;
  --brand-dark: #f8fafc;
  --brand-glow: rgba(56, 189, 248, 0.28);
  --brand-gradient: linear-gradient(135deg, #0284c7 0%, #38bdf8 100%);
  --brand-gradient-hover: linear-gradient(135deg, #0369a1 0%, #0284c7 100%);
  
  --card-shadow: 0 4px 24px -2px rgba(0, 0, 0, 0.5);
  --card-shadow-hover: 0 20px 40px -10px rgba(56, 189, 248, 0.2);
  --header-shadow: 0 1px 0 rgba(36, 50, 76, 0.6);
}

/* --- 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: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all var(--transition-fast);
}

img, svg {
  vertical-align: middle;
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* Smooth anchor target scrolling offset */
section[id] {
  scroll-margin-top: 86px;
}

/* --- Container & Layout --- */
.container {
  width: 100%;
  max-width: 1220px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 28px;
  padding-right: 28px;
}

.section {
  padding-top: 100px;
  padding-bottom: 100px;
  position: relative;
}

.section-alt {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 60px auto;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--brand-primary);
  background-color: rgba(2, 132, 199, 0.08);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-full);
  margin-bottom: 18px;
  letter-spacing: 0.8px;
  text-transform: uppercase;
}

.section-tag svg {
  width: 14px;
  height: 14px;
}

.section-title {
  font-size: 2.35rem;
  font-weight: 800;
  line-height: 1.28;
  color: var(--text-primary);
  margin-bottom: 16px;
  letter-spacing: -0.6px;
}

.section-desc {
  font-size: 1.08rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* --- Header & Navigation Bar --- */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background-color: var(--bg-glass-nav);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition-normal);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.4px;
}

.logo-symbol {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--brand-primary);
  color: #ffffff;
  box-shadow: 0 2px 8px var(--brand-glow);
}

.logo-symbol svg {
  width: 20px;
  height: 20px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 22px;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 6px 4px;
  transition: color var(--transition-fast);
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--brand-primary);
  transition: all var(--transition-fast);
  transform: translateX(-50%);
  border-radius: var(--radius-full);
}

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

.nav-badge-new {
  font-size: 0.7rem;
  padding: 2px 6px;
  background: var(--brand-primary);
  color: #ffffff;
  border-radius: var(--radius-full);
  margin-left: 4px;
  vertical-align: middle;
}

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

/* --- Theme Toggle Button (Day / Night Exquisite Translucent) --- */
.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-full);
  background: rgba(241, 245, 249, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.04);
}

.theme-toggle-btn:hover {
  color: var(--brand-primary);
  background: rgba(255, 255, 255, 0.95);
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
  transform: translateY(-1px);
}

[data-theme="dark"] .theme-toggle-btn {
  background: rgba(22, 32, 53, 0.65);
  border-color: var(--border-color);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .theme-toggle-btn:hover {
  background: rgba(22, 32, 53, 0.95);
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
}

.theme-toggle-btn svg {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.theme-icon-sun {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

.theme-icon-moon {
  position: absolute;
  opacity: 0;
  transform: rotate(90deg) scale(0.5);
}

[data-theme="dark"] .theme-icon-sun {
  opacity: 0;
  transform: rotate(-90deg) scale(0.5);
}

[data-theme="dark"] .theme-icon-moon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

.mobile-nav-toggle {
  display: none;
  padding: 8px;
  color: var(--text-primary);
  border-radius: var(--radius-sm);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  font-size: 0.94rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background: var(--brand-primary);
  color: #ffffff !important;
  box-shadow: 0 2px 10px var(--brand-glow);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.btn-primary:hover {
  background: var(--brand-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 18px var(--brand-glow);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: var(--bg-secondary);
  border-color: var(--border-focus);
  color: var(--brand-primary);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 14px 30px;
  font-size: 1.05rem;
  border-radius: var(--radius-lg);
}

.btn-block {
  width: 100%;
}

/* --- Hero Section & Editorial Balance --- */
.hero-section {
  padding-top: 80px;
  padding-bottom: 96px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.95fr;
  gap: 56px;
  align-items: center;
}

.hero-badge-wrap {
  margin-bottom: 24px;
}

.hero-headline {
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -1.2px;
  color: var(--text-primary);
  margin-bottom: 22px;
}

.hero-headline .brand-highlight {
  color: var(--brand-primary);
  font-weight: 900;
}

.hero-subheadline {
  font-size: 1.18rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 36px;
  max-width: 580px;
}

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

.hero-specs-row {
  display: flex;
  align-items: center;
  gap: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
}

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

.spec-val {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.2;
}

.spec-lbl {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* --- Centerpiece: Interactive Porcelain Card (iOS Widget with Tactile Toggle) --- */
.hero-widget-perspective {
  perspective: 1200px;
  display: flex;
  justify-content: center;
}

.porcelain-card {
  width: 100%;
  max-width: 440px;
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 32px 28px;
  box-shadow: 0 16px 40px -10px rgba(15, 23, 42, 0.08), 0 0 0 1px rgba(255, 255, 255, 0.8) inset;
  transition: transform 0.15s ease-out, box-shadow var(--transition-normal);
  transform-style: preserve-3d;
  position: relative;
}

[data-theme="dark"] .porcelain-card {
  box-shadow: 0 20px 45px -10px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(255, 255, 255, 0.08) inset;
}

.widget-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-subtle);
}

.widget-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
}

.widget-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background: rgba(16, 185, 129, 0.1);
  color: var(--accent-emerald);
  border: 1px solid rgba(16, 185, 129, 0.25);
  transition: all var(--transition-fast);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  box-shadow: 0 0 8px var(--accent-emerald);
  transition: background-color var(--transition-fast);
}

/* Tactile Hardware Toggle Button in Widget */
.widget-interactive-area {
  text-align: center;
  padding: 24px 16px;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  margin-bottom: 24px;
  position: relative;
  overflow: hidden;
}

.tactile-power-btn {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  background: #ffffff;
  border: 2px solid var(--border-color);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08), 0 2px 4px rgba(15, 23, 42, 0.04);
  color: var(--brand-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
  cursor: pointer;
  outline: none;
  transition: all var(--transition-bounce);
  margin-bottom: 14px;
}

[data-theme="dark"] .tactile-power-btn {
  background: #17233c;
  border-color: var(--border-color);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.tactile-power-btn svg {
  width: 36px;
  height: 36px;
  transition: transform var(--transition-bounce), color var(--transition-fast);
}

/* Ripple Halo Animation */
.ripple-halo {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 88px;
  height: 88px;
  border-radius: 50%;
  border: 2px solid var(--brand-primary);
  opacity: 0;
  transform: translate(-50%, -50%) scale(1);
  pointer-events: none;
}

.tactile-power-btn.is-animating .ripple-halo {
  animation: rippleRing 0.75s ease-out;
}

@keyframes rippleRing {
  0% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0.8;
  }
  100% {
    transform: translate(-50%, -50%) scale(1.9);
    opacity: 0;
  }
}

/* Connected State */
.tactile-power-btn.connected {
  border-color: var(--accent-emerald);
  color: var(--accent-emerald);
  box-shadow: 0 0 0 4px var(--accent-emerald-glow), 0 10px 25px rgba(16, 185, 129, 0.15);
  transform: scale(1.05);
}

.tactile-btn-label {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  display: block;
  margin-bottom: 4px;
}

.tactile-btn-sub {
  font-size: 0.84rem;
  color: var(--text-muted);
}

/* Widget Node Spec Details */
.widget-specs-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.spec-cell {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.spec-cell svg {
  width: 18px;
  height: 18px;
  color: var(--brand-primary);
  flex-shrink: 0;
}

.spec-cell-text {
  display: flex;
  flex-direction: column;
}

.spec-cell-text .label {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.spec-cell-text .val {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* --- Pure Value Proposition (3 Understated Porcelain Cards) --- */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.porcelain-feature-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 38px 30px;
  box-shadow: var(--card-shadow);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  position: relative;
}

.porcelain-feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-focus);
  box-shadow: var(--card-shadow-hover);
}

.card-hairline-icon {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  background: rgba(2, 132, 199, 0.08);
  border: 1px solid var(--border-accent);
  color: var(--brand-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  transition: transform var(--transition-fast);
}

.porcelain-feature-card:hover .card-hairline-icon {
  transform: scale(1.08);
}

.card-hairline-icon svg {
  width: 28px;
  height: 28px;
}

.porcelain-card-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
  line-height: 1.35;
}

.porcelain-card-desc {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 22px;
  flex-grow: 1;
}

.hairline-checklist {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-top: 18px;
  border-top: 1px solid var(--border-subtle);
}

.checklist-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.checklist-item svg {
  width: 16px;
  height: 16px;
  color: var(--accent-emerald);
  flex-shrink: 0;
}

/* --- Showcase Sections (Streaming & AI) --- */
.showcase-block {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 44px;
  box-shadow: var(--card-shadow);
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 40px;
  transition: border-color var(--transition-normal);
}

.showcase-block:hover {
  border-color: var(--border-focus);
}

.showcase-info h3 {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 16px;
  line-height: 1.3;
}

.showcase-info p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 24px;
}

.hairline-highlights {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 30px;
}

.highlight-point {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.94rem;
  color: var(--text-secondary);
}

.highlight-point svg {
  width: 20px;
  height: 20px;
  color: var(--brand-primary);
  flex-shrink: 0;
  margin-top: 2px;
}

.telecom-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  background: var(--bg-secondary);
  padding: 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.telecom-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 16px 10px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  text-align: center;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.telecom-badge:hover {
  transform: translateY(-2px);
  border-color: var(--brand-primary);
  box-shadow: 0 4px 12px rgba(2, 132, 199, 0.12);
}

.telecom-badge svg {
  width: 26px;
  height: 26px;
}

/* --- Client Download Section --- */
.client-download-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.client-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  text-align: center;
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.client-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-focus);
  box-shadow: var(--card-shadow);
}

.client-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: rgba(2, 132, 199, 0.08);
  border: 1px solid var(--border-accent);
  color: var(--brand-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}

.client-icon svg {
  width: 24px;
  height: 24px;
}

.client-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.client-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.client-link {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--brand-primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* --- Transparent Pricing Table (With Row Hover Wash & Indicator Point) --- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-plan-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  box-shadow: var(--card-shadow);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  position: relative;
}

.pricing-plan-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--card-shadow-hover);
}

.pricing-plan-card.featured {
  border: 2px solid var(--brand-primary);
  box-shadow: 0 12px 36px -4px var(--brand-glow);
  transform: scale(1.03);
  z-index: 2;
}

.pricing-plan-card.featured:hover {
  transform: scale(1.03) translateY(-6px);
}

.plan-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--brand-primary);
  color: #ffffff;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 18px;
  border-radius: var(--radius-full);
  letter-spacing: 0.5px;
  box-shadow: 0 4px 12px var(--brand-glow);
  white-space: nowrap;
}

.plan-header {
  text-align: center;
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-subtle);
}

.plan-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

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

.plan-pricing {
  margin: 18px 0;
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
}

.currency-symbol {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
}

.price-number {
  font-size: 3.1rem;
  font-weight: 900;
  color: var(--text-primary);
  line-height: 1;
}

.price-unit {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.plan-savings-pill {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-emerald);
  background: rgba(16, 185, 129, 0.1);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-top: 6px;
}

/* Feature Rows with Hover Wash & Icy-Blue Indicator Point */
.plan-features-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 32px;
  flex-grow: 1;
}

.plan-row-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  position: relative;
}

.plan-row-item:hover {
  background: rgba(2, 132, 199, 0.06); /* Translucent grey-blue wash */
  color: var(--text-primary);
}

.plan-row-item::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: transparent;
  transition: all var(--transition-fast);
  position: absolute;
  left: 3px;
}

.plan-row-item:hover::before {
  background: var(--brand-primary); /* Icy-blue indicator point */
  box-shadow: 0 0 8px var(--brand-primary);
}

.plan-row-item svg {
  width: 17px;
  height: 17px;
  color: var(--accent-emerald);
  flex-shrink: 0;
  margin-left: 2px;
}

/* One-Click Copy Subscription Bar Card */
.copy-sub-bar {
  margin-top: 48px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  box-shadow: var(--card-shadow);
  flex-wrap: wrap;
}

.copy-sub-info {
  display: flex;
  align-items: center;
  gap: 16px;
}

.copy-sub-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(2, 132, 199, 0.08);
  border: 1px solid var(--border-accent);
  color: var(--brand-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.copy-sub-icon svg {
  width: 22px;
  height: 22px;
}

.copy-sub-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
}

.copy-sub-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.btn-copy-interactive {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.btn-copy-interactive:hover {
  border-color: var(--border-focus);
  color: var(--brand-primary);
  background: var(--bg-primary);
}

.btn-copy-interactive.copied {
  background: rgba(16, 185, 129, 0.12);
  border-color: var(--accent-emerald);
  color: var(--accent-emerald);
}

/* Interactive Toast Notification */
.toast-notice {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 999;
  background: var(--bg-card-solid);
  border: 1px solid var(--border-color);
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.15);
  padding: 14px 22px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-primary);
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
}

.toast-notice.show {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.toast-notice svg {
  width: 18px;
  height: 18px;
  color: var(--accent-emerald);
}

/* --- Testimonials Section --- */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--card-shadow);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform var(--transition-normal);
}

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

.testimonial-header-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--brand-primary);
  margin-bottom: 14px;
}

.testimonial-text {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 24px;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--border-subtle);
  padding-top: 16px;
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: rgba(2, 132, 199, 0.12);
  border: 1px solid var(--border-accent);
  color: var(--brand-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.05rem;
  flex-shrink: 0;
}

.author-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
}

.author-role {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* --- FAQ Section --- */
.faq-container {
  max-width: 840px;
  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-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

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

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  text-align: left;
  cursor: pointer;
  background: none;
}

.faq-question svg {
  width: 18px;
  height: 18px;
  color: var(--text-muted);
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

.faq-item.active .faq-question svg {
  transform: rotate(180deg);
  color: var(--brand-primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out, padding 0.3s ease;
  background-color: var(--bg-secondary);
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

.faq-item.active .faq-answer {
  max-height: 320px;
  padding: 0 24px 20px 24px;
}

/* --- Bottom CTA Section --- */
.bottom-cta-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 56px 40px;
  text-align: center;
  box-shadow: var(--card-shadow);
  position: relative;
  overflow: hidden;
}

.bottom-cta-card h2 {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.bottom-cta-card p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 32px auto;
  line-height: 1.7;
}

/* --- Footer (Strictly exactly 4 titles opening in new tab) --- */
.site-footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding-top: 56px;
  padding-bottom: 48px;
  transition: all var(--transition-normal);
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 32px;
  text-align: center;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
}

.footer-link {
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--text-secondary);
  position: relative;
  transition: color var(--transition-fast);
}

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

.footer-divider {
  width: 100%;
  max-width: 600px;
  height: 1px;
  background-color: var(--border-color);
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

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

/* --- Subpages (About, Terms, Privacy, Sitemap, Insights) --- */
.page-header {
  padding-top: 68px;
  padding-bottom: 52px;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  text-align: center;
}

.page-title {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.page-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto;
}

.page-body {
  padding-top: 60px;
  padding-bottom: 90px;
}

.legal-content, .info-content {
  max-width: 880px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--card-shadow);
}

.legal-section, .info-section {
  margin-bottom: 40px;
}

.legal-section:last-child, .info-section:last-child {
  margin-bottom: 0;
}

.legal-section h2, .info-section h2 {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  gap: 10px;
}

.legal-section h2 svg, .info-section h2 svg {
  width: 22px;
  height: 22px;
  color: var(--brand-primary);
}

.legal-section p, .info-section p {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 14px;
}

.legal-list, .info-list {
  list-style: disc;
  padding-left: 24px;
  margin-bottom: 16px;
  color: var(--text-secondary);
}

.legal-list li, .info-list li {
  margin-bottom: 8px;
  line-height: 1.7;
}

.callout-box {
  background-color: var(--bg-secondary);
  border-left: 4px solid var(--brand-primary);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 20px 0;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.callout-box.danger {
  border-left-color: #ef4444;
  background-color: rgba(239, 68, 68, 0.08);
}

.callout-box.success {
  border-left-color: var(--accent-emerald);
  background-color: rgba(16, 185, 129, 0.08);
}

/* Articles / Insights Grid */
.insights-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin-top: 24px;
}

.insight-article-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
}

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

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

.article-category {
  font-weight: 600;
  color: var(--brand-primary);
  background: rgba(2, 132, 199, 0.08);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.article-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
  line-height: 1.4;
}

.article-excerpt {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 18px;
  flex-grow: 1;
}

.article-read-link {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--brand-primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* Sitemap tree */
.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.sitemap-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
}

.sitemap-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.sitemap-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sitemap-links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.sitemap-links a:hover {
  color: var(--brand-primary);
  border-color: var(--border-focus);
  transform: translateX(4px);
}

/* --- Responsive Media Queries (@media) --- */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 44px;
    text-align: center;
  }
  
  .hero-subheadline {
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-cta-group {
    justify-content: center;
  }
  
  .hero-specs-row {
    justify-content: center;
  }
  
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .pricing-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }
  
  .pricing-plan-card {
    padding: 28px 18px;
  }
  
  .pricing-plan-card.featured {
    transform: none;
  }
  
  .pricing-plan-card.featured:hover {
    transform: translateY(-6px);
  }
  
  .showcase-block {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 32px;
  }
  
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .client-download-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .section {
    padding-top: 60px;
    padding-bottom: 60px;
  }
  
  .section-title {
    font-size: 1.85rem;
  }
  
  .header-inner {
    height: 64px;
  }
  
  .nav-menu {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background-color: var(--bg-card-solid);
    border-bottom: 1px solid var(--border-color);
    padding: 20px 24px;
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    box-shadow: 0 10px 25px rgba(15, 23, 42, 0.1);
  }
  
  .nav-menu.active {
    display: flex;
  }
  
  .mobile-nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
  
  .hero-headline {
    font-size: 2.2rem;
  }
  
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }
  
  .hero-cta-group .btn {
    width: 100%;
  }
  
  .grid-3 {
    grid-template-columns: 1fr;
  }
  
  .pricing-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  .telecom-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
  
  .client-download-grid {
    grid-template-columns: 1fr;
  }
  
  .insights-grid {
    grid-template-columns: 1fr;
  }
  
  .copy-sub-bar {
    flex-direction: column;
    align-items: flex-start;
    padding: 20px;
  }
  
  .footer-nav {
    gap: 20px;
    flex-direction: column;
  }
  
  .legal-content, .info-content {
    padding: 24px 18px;
  }
  
  .sitemap-grid {
    grid-template-columns: 1fr;
  }
  
  .btn {
    min-height: 48px; /* Thumb touch targets */
  }
}
/* --- SEO Long-form Educational Article Layout System --- */
.article-container {
  max-width: 900px;
  margin: 0 auto;
  padding-top: 40px;
  padding-bottom: 90px;
}

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

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

.breadcrumb-nav a:hover {
  color: var(--brand-primary);
}

.breadcrumb-separator {
  color: var(--text-light);
}

.article-main-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--card-shadow);
}

.article-hero-header {
  margin-bottom: 36px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-subtle);
}

.article-hero-title {
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.35;
  color: var(--text-primary);
  margin-bottom: 18px;
  letter-spacing: -0.5px;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.86rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.article-tag-badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  background: rgba(2, 132, 199, 0.08);
  border: 1px solid var(--border-accent);
  color: var(--brand-primary);
  font-weight: 600;
  font-size: 0.78rem;
}

/* Table of Contents (TOC) */
.article-toc-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin: 32px 0 44px 0;
}

.article-toc-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}

.article-toc-title svg {
  width: 18px;
  height: 18px;
  color: var(--brand-primary);
}

.article-toc-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  list-style: none;
  padding-left: 0;
}

.article-toc-item a {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.article-toc-item a:hover {
  color: var(--brand-primary);
  transform: translateX(4px);
}

.toc-num {
  font-family: monospace;
  font-weight: 700;
  color: var(--brand-primary);
}

/* Article Prose Typography */
.article-prose h2 {
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-top: 48px;
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  gap: 10px;
  scroll-margin-top: 96px;
}

.article-prose h2 svg {
  width: 22px;
  height: 22px;
  color: var(--brand-primary);
}

.article-prose h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 32px;
  margin-bottom: 14px;
}

.article-prose p {
  font-size: 1.02rem;
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 20px;
}

.article-prose ul, .article-prose ol {
  margin-bottom: 24px;
  padding-left: 24px;
  color: var(--text-secondary);
}

.article-prose li {
  margin-bottom: 10px;
  line-height: 1.75;
}

.article-prose strong {
  color: var(--text-primary);
}

/* In-text internal links */
.intext-brand-link {
  color: var(--brand-primary);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: all var(--transition-fast);
}

.intext-brand-link:hover {
  color: var(--brand-primary-hover);
  background: rgba(2, 132, 199, 0.08);
  border-radius: 4px;
}

/* Article Comparison Table */
.article-table-wrap {
  width: 100%;
  overflow-x: auto;
  margin: 28px 0;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-card);
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.94rem;
}

.article-table th {
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-weight: 700;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

.article-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.article-table tr:last-child td {
  border-bottom: none;
}

.article-table tr:hover td {
  background: rgba(2, 132, 199, 0.04);
}

/* Step Guides Box */
.step-guide-box {
  display: flex;
  gap: 18px;
  margin-bottom: 24px;
  background: var(--bg-secondary);
  padding: 20px 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.step-num-badge {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--brand-primary);
  color: #ffffff;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.step-guide-content h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.step-guide-content p {
  margin-bottom: 0;
  font-size: 0.94rem;
}

/* Article FAQ Box */
.article-faq-section {
  margin-top: 56px;
  padding-top: 36px;
  border-top: 1px solid var(--border-color);
}

.article-faq-section h3 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.faq-card-unit {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 22px 26px;
  margin-bottom: 16px;
}

.faq-card-unit h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.faq-card-unit p {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 0;
}

/* Related Articles Box */
.article-related-section {
  margin-top: 56px;
  padding-top: 36px;
  border-top: 1px solid var(--border-color);
}

.article-related-section h3 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}

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

.related-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
}

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

.related-card-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.4;
}

.related-card-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 14px;
  flex-grow: 1;
}

.related-card-link {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--brand-primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

@media (max-width: 768px) {
  .article-container {
    padding-top: 24px;
  }
  
  .article-main-card {
    padding: 24px 18px;
  }
  
  .article-hero-title {
    font-size: 1.7rem;
  }
  
  .related-grid {
    grid-template-columns: 1fr;
  }
  
  .step-guide-box {
    flex-direction: column;
    gap: 12px;
  }
}