/* ==========================================================================
   PAOFU YUN (泡芙云) BRAND LANDING PAGE TEMPLATE DESIGN SYSTEM
   Modern, Clean, Vibrant Cyan Accent, Dark/Light Mode Responsive Styling
   ========================================================================== */

:root {
  /* Color Palette - Light Mode */
  --primary: #00c4ee;
  --primary-hover: #00b0d6;
  --primary-light: rgba(0, 196, 238, 0.1);
  --primary-border: rgba(0, 196, 238, 0.3);
  --primary-gradient: linear-gradient(135deg, #00c4ee 0%, #0096ff 100%);
  
  --bg-main: #ffffff;
  --bg-card: #f8fafc;
  --bg-card-hover: #ffffff;
  --bg-subtle: #f1f5f9;
  
  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  
  --border-color: #e2e8f0;
  --border-focus: #00c4ee;
  
  --badge-bg: #00c4ee;
  --badge-text: #ffffff;
  --discount-text: #10b981;
  
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 20px rgba(0, 196, 238, 0.08);
  --shadow-lg: 0 12px 32px rgba(0, 196, 238, 0.15);
  --shadow-card: 0 4px 24px rgba(149, 157, 165, 0.08);
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

/* Dark Theme Overrides */
[data-theme="dark"] {
  --bg-main: #0b1120;
  --bg-card: #151e32;
  --bg-card-hover: #1c2842;
  --bg-subtle: #1e293b;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-light: #64748b;
  
  --border-color: #24334d;
  --border-focus: #00c4ee;
  
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 32px rgba(0, 196, 238, 0.2);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Focus styles for keyboard accessibility */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
}

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

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Typography Extensions */
.brand-font {
  font-weight: 900;
  letter-spacing: -0.02em;
}

/* Header & Navigation */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

[data-theme="dark"] .navbar {
  background: rgba(11, 17, 32, 0.88);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.3rem;
  color: var(--text-main);
}

.logo-icon-wrap {
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-icon-wrap svg {
  width: 100%;
  height: 100%;
  transition: transform 0.3s ease;
}

.brand-logo:hover .logo-icon-wrap svg {
  transform: scale(1.08);
}

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

.nav-link {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: var(--transition);
  position: relative;
  padding: 6px 0;
}

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

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2.5px;
  background-color: var(--primary);
  border-radius: var(--radius-full);
}

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

/* Language Toggle Switch */
.lang-switch {
  display: flex;
  background: var(--bg-subtle);
  border-radius: var(--radius-full);
  padding: 3px;
  border: 1px solid var(--border-color);
}

.lang-btn {
  padding: 4px 12px;
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  color: var(--text-muted);
  transition: var(--transition);
}

.lang-btn.active {
  background-color: var(--primary);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(0, 196, 238, 0.3);
}

/* Theme Toggle Button */
.theme-toggle-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-subtle);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.theme-toggle-btn:hover {
  background: var(--primary-light);
  color: var(--primary);
  border-color: var(--primary-border);
}

/* Auth / Official Site Button */
.auth-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  border: 1px solid var(--primary-border);
  font-size: 0.9rem;
  font-weight: 700;
  color: #ffffff;
  background: var(--primary);
  box-shadow: 0 4px 12px rgba(0, 196, 238, 0.25);
  transition: var(--transition);
}

.auth-btn:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(0, 196, 238, 0.35);
}

/* Mobile Nav Toggle */
.mobile-toggle {
  display: none;
  font-size: 1.5rem;
  color: var(--text-main);
  padding: 4px 8px;
}

/* HERO SECTION */
.hero-section {
  padding: 80px 0 60px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.hero-content h1 {
  font-size: 2.85rem;
  font-weight: 900;
  line-height: 1.25;
  color: var(--text-main);
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 580px;
}

.hero-checklist {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 36px;
}

.hero-checklist li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.975rem;
  font-weight: 600;
  color: var(--text-main);
}

.check-icon {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-weight: 800;
}

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

.btn-primary {
  padding: 14px 32px;
  border-radius: var(--radius-full);
  background: var(--primary);
  color: #ffffff;
  font-weight: 700;
  font-size: 1rem;
  box-shadow: 0 8px 24px rgba(0, 196, 238, 0.35);
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(0, 196, 238, 0.45);
}

.btn-secondary {
  padding: 14px 28px;
  border-radius: var(--radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  font-weight: 600;
  font-size: 1rem;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-secondary:hover {
  background: var(--bg-main);
  border-color: var(--text-muted);
  transform: translateY(-2px);
}

/* Supported Platforms Bar */
.platforms-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 500;
}

.platform-icons {
  display: flex;
  align-items: center;
  gap: 14px;
}

.platform-icon {
  width: 20px;
  height: 20px;
  fill: currentColor;
  opacity: 0.75;
  transition: var(--transition);
}

.platform-icon:hover {
  opacity: 1;
  color: var(--primary);
}

/* Hero Visual Graphic */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-visual-card {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.hero-graphic-svg {
  width: 100%;
  height: auto;
  display: block;
}

/* CORE ADVANTAGES SECTION */
.advantages-section {
  padding: 80px 0;
  background-color: var(--bg-subtle);
}

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

.adv-card {
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  transition: var(--transition);
}

.adv-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-border);
}

.adv-icon-wrap {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.adv-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
}

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

/* STREAMING & AI SUPPORT SECTION */
.streaming-section {
  padding: 80px 0;
  background-color: var(--bg-main);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.service-item-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  transition: var(--transition);
}

.service-item-card:hover {
  border-color: var(--primary);
  transform: translateY(-3px);
}

.service-icon-box {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--bg-main);
  box-shadow: var(--shadow-sm);
}

.service-item-card h4 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}

.service-item-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.service-disclaimer-note {
  margin-top: 36px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-light);
  background: var(--bg-card);
  padding: 12px 24px;
  border-radius: var(--radius-full);
  display: inline-block;
}

/* FEATURES SECTION */
.features-section {
  padding: 80px 0;
  background-color: var(--bg-subtle);
}

.tabs-wrapper {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 48px;
}

.tab-btn {
  padding: 12px 28px;
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-weight: 600;
  background: var(--bg-card);
  color: var(--text-muted);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.tab-btn.active {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
  box-shadow: 0 4px 16px rgba(0, 196, 238, 0.3);
}

.feature-panel {
  display: none;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  animation: fadeIn 0.4s ease forwards;
}

.feature-panel.active {
  display: grid;
}

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

.feature-text h3 {
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: 20px;
  color: var(--text-main);
  line-height: 1.3;
}

.feature-text p {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.8;
}

.feature-card-display {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
}

/* Dynamic Speed Meter Card inside Feature 1 */
.speed-meter-box {
  width: 100%;
  max-width: 380px;
  background: var(--bg-main);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
}

.meter-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.825rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.meter-status {
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 196, 238, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(0, 196, 238, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 196, 238, 0); }
}

.meter-ping {
  color: var(--discount-text);
  font-weight: 700;
}

.speed-value-display {
  font-size: 3.25rem;
  font-weight: 900;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 4px;
  letter-spacing: -0.03em;
}

.speed-unit {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: 24px;
}

.equalizer-bars {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 6px;
  height: 48px;
}

.bar {
  width: 8px;
  background: var(--primary);
  border-radius: var(--radius-full);
  opacity: 0.6;
  animation: equalize 1.2s ease-in-out infinite alternate;
}

.bar:nth-child(1) { height: 40%; animation-delay: 0.1s; }
.bar:nth-child(2) { height: 75%; animation-delay: 0.3s; }
.bar:nth-child(3) { height: 90%; animation-delay: 0.2s; }
.bar:nth-child(4) { height: 60%; animation-delay: 0.4s; }
.bar:nth-child(5) { height: 100%; animation-delay: 0.1s; }
.bar:nth-child(6) { height: 70%; animation-delay: 0.5s; }
.bar:nth-child(7) { height: 85%; animation-delay: 0.2s; }
.bar:nth-child(8) { height: 50%; animation-delay: 0.3s; }

@keyframes equalize {
  0% { height: 20%; opacity: 0.3; }
  100% { height: 100%; opacity: 1; }
}

/* PRICING SECTION */
.pricing-section {
  padding: 80px 0;
  background-color: var(--bg-main);
}

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

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 12px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
}

.pricing-cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
  margin-bottom: 60px;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 28px 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  transition: var(--transition);
}

.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

/* Recommended Highlighted Pricing Card */
.pricing-card.recommended {
  border: 2px solid var(--primary);
  background: var(--bg-card);
  box-shadow: var(--shadow-lg);
  z-index: 2;
}

.badge-recommended {
  position: absolute;
  top: -14px;
  background: var(--primary);
  color: #ffffff;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  font-size: 0.775rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.tier-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 16px;
}

.tier-price-box {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 8px;
}

.currency-symbol {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-main);
}

.price-amount {
  font-size: 3rem;
  font-weight: 900;
  color: var(--text-main);
  line-height: 1;
}

.price-period {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 500;
}

.savings-tag {
  color: var(--discount-text);
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 28px;
  min-height: 20px;
}

.card-action-btn {
  width: 100%;
  padding: 12px 20px;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 0.95rem;
  transition: var(--transition);
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-outline-cyan {
  border: 1px solid var(--primary-border);
  color: var(--primary);
  background: var(--bg-main);
}

.btn-outline-cyan:hover {
  background: var(--primary-light);
  border-color: var(--primary);
}

.btn-filled-cyan {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 4px 16px rgba(0, 196, 238, 0.35);
}

.btn-filled-cyan:hover {
  background: var(--primary-hover);
  box-shadow: 0 6px 20px rgba(0, 196, 238, 0.45);
}

/* COMPARISON TABLE */
.comparison-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.comparison-table-header {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  padding: 20px 28px;
  background: rgba(0, 196, 238, 0.04);
  border-bottom: 1px solid var(--border-color);
  font-weight: 700;
  font-size: 0.95rem;
}

.table-col-header {
  text-align: center;
}

.table-col-header.first-col {
  text-align: left;
  font-size: 1.1rem;
  color: var(--text-main);
}

.table-col-header.cyan-highlight {
  color: var(--primary);
}

.comparison-row {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  padding: 18px 28px;
  border-bottom: 1px solid var(--border-color);
  align-items: center;
  font-size: 0.9rem;
}

.comparison-row:last-child {
  border-bottom: none;
}

.feature-label {
  font-weight: 600;
  color: var(--text-main);
}

.feature-val {
  text-align: center;
  color: var(--text-muted);
}

.feature-val.highlight {
  color: var(--primary);
  font-weight: 700;
}

.check-green {
  color: var(--discount-text);
  font-size: 1.1rem;
  font-weight: 800;
}

/* FAQ SECTION */
.faq-section {
  padding: 80px 0;
  background-color: var(--bg-subtle);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.faq-question {
  width: 100%;
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
  text-align: left;
}

.faq-icon {
  font-size: 1.25rem;
  transition: transform 0.3s ease;
  color: var(--primary);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0.4, 0, 0.2, 1), padding 0.3s ease;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 240px;
  padding: 0 24px 20px;
}

/* RIGHT SIDE FLOATING NAV ARROWS */
.floating-side-nav {
  position: fixed;
  right: 24px;
  bottom: 40px;
  z-index: 990;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.side-arrow-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--bg-main);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: var(--transition);
}

.side-arrow-btn:hover:not(:disabled) {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
  transform: translateY(-2px);
}

.side-arrow-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  box-shadow: none;
}

/* FOOTER */
.footer {
  padding: 60px 0 32px;
  background: var(--bg-main);
  border-top: 1px solid var(--border-color);
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-nav-only {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  text-align: center;
  margin-bottom: 32px;
}

.footer-links-row {
  display: flex;
  align-items: center;
  gap: 36px;
  list-style: none;
  flex-wrap: wrap;
  justify-content: center;
}

.footer-link-item {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-main);
  transition: var(--transition);
}

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

.footer-bottom {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  font-size: 0.85rem;
}

/* ARTICLE / KNOWLEDGE LIST & CONTENT STYLES */
.page-hero {
  padding: 60px 0 40px;
  background: var(--bg-subtle);
  border-bottom: 1px solid var(--border-color);
}

.page-hero-title {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 12px;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  padding: 60px 0;
}

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

.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-border);
}

.article-date {
  font-size: 0.8rem;
  color: var(--text-light);
  margin-bottom: 12px;
  font-weight: 600;
}

.article-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 14px;
  line-height: 1.4;
}

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

.read-more-link {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

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

/* ARTICLE DETAIL CONTENT */
.article-detail-container {
  max-width: 860px;
  margin: 0 auto;
  padding: 60px 24px;
}

.article-header {
  margin-bottom: 40px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 24px;
}

.article-detail-title {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--text-main);
  line-height: 1.3;
  margin-bottom: 16px;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.article-body {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-main);
}

.article-body h2 {
  font-size: 1.75rem;
  font-weight: 800;
  margin: 36px 0 16px;
  color: var(--text-main);
}

.article-body h3 {
  font-size: 1.35rem;
  font-weight: 700;
  margin: 28px 0 12px;
  color: var(--text-main);
}

.article-body p {
  margin-bottom: 20px;
  color: var(--text-muted);
}

.article-body ul, .article-body ol {
  margin-bottom: 20px;
  padding-left: 24px;
  color: var(--text-muted);
}

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

.promo-callout-box {
  background: var(--primary-light);
  border-left: 4px solid var(--primary);
  padding: 24px;
  border-radius: var(--radius-sm);
  margin: 32px 0;
}

.promo-callout-box h4 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}

.promo-callout-box p {
  color: var(--text-main);
  margin-bottom: 16px;
}

/* RESPONSIVE DESIGN */
@media (max-width: 1024px) {
  .hero-grid,
  .feature-panel {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .advantages-grid,
  .services-grid,
  .articles-grid,
  .pricing-cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .hero-content {
    text-align: center;
  }
  
  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-checklist {
    align-items: flex-start;
    display: inline-flex;
    text-align: left;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .platforms-bar {
    justify-content: center;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  
  .mobile-toggle {
    display: block;
  }
  
  .hero-content h1 {
    font-size: 2.15rem;
  }
  
  .advantages-grid,
  .services-grid,
  .articles-grid,
  .pricing-cards-grid {
    grid-template-columns: 1fr;
  }
  
  .comparison-container {
    overflow-x: auto;
  }
  
  .comparison-table-header,
  .comparison-row {
    min-width: 600px;
  }
  
  .floating-side-nav {
    right: 12px;
    bottom: 24px;
  }
  
  .side-arrow-btn {
    width: 38px;
    height: 38px;
    font-size: 0.95rem;
  }
}

/* Respect prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
  *, ::before, ::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}