/* ==========================================================================
   白月光 (BaiYueGuang) Design System & Layout Styles
   Style: Minimalist, Modern, Soft Light Theme, Rounded Corners & Glassmorphism
   ========================================================================== */

/* --- CSS Variables / Design Tokens --- */
:root {
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-family-rounded: "Comfortaa", "Quicksand", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-subtle: #f1f5f9;
  --bg-nav: rgba(255, 255, 255, 0.85);

  --text-main: #0f172a;
  --text-muted: #475569;
  --text-light: #94a3b8;

  --color-primary: #6366f1;
  --color-primary-hover: #4f46e5;
  --color-primary-light: #eef2ff;
  --color-accent: #8b5cf6;

  --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  --gradient-primary-hover: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
  --gradient-subtle: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);

  --border-color: #e2e8f0;
  --border-color-hover: #cbd5e1;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --shadow-sm: 0 2px 4px rgba(15, 23, 42, 0.03);
  --shadow-md: 0 10px 25px -5px rgba(15, 23, 42, 0.05), 0 8px 10px -6px rgba(15, 23, 42, 0.02);
  --shadow-lg: 0 20px 40px -15px rgba(99, 102, 241, 0.12);
  --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.03);

  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);

  --header-height: 76px;
  --container-max-width: 1200px;
}

/* --- 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;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

ul, ol {
  list-style: none;
}

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

/* Focus styles for accessibility */
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

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

/* --- Layout Utility Classes --- */
.container {
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.section {
  padding: 5rem 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 3.5rem auto;
}

.section-tag {
  display: inline-block;
  padding: 0.35rem 1rem;
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  margin-bottom: 0.75rem;
  letter-spacing: 0.02em;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
  line-height: 1.25;
}

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

/* --- Header / Navigation --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-height);
  background: var(--bg-nav);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.7);
  transition: all var(--transition-fast);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  font-family: var(--font-family-rounded);
}

.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  font-weight: 5rem;
  font-size: 0.95rem;
  color: var(--text-muted);
  position: relative;
  padding: 0.5rem 0;
}

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

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

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

.header-cta {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* --- Mobile Navigation Toggle --- */
.mobile-nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 28px;
  height: 24px;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: 1010;
}

.mobile-nav-toggle span {
  width: 100%;
  height: 2px;
  background-color: var(--text-main);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.6rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: all var(--transition-normal);
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
}

.btn-primary:hover {
  background: var(--gradient-primary-hover);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.45);
  transform: translateY(-2px);
}

.btn-secondary {
  background-color: var(--bg-card);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  border-color: rgba(99, 102, 241, 0.3);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 0.5rem 1.1rem;
  font-size: 0.875rem;
}

.btn-lg {
  padding: 0.95rem 2.2rem;
  font-size: 1.05rem;
}

/* --- Hero Section --- */
.hero-section {
  padding: 5rem 0 4rem 0;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-content {
  max-width: 580px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  background-color: rgba(99, 102, 241, 0.08);
  border: 1px solid rgba(99, 102, 241, 0.15);
  border-radius: var(--radius-full);
  color: var(--color-primary);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-primary);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(99, 102, 241, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(99, 102, 241, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(99, 102, 241, 0); }
}

.hero-title {
  font-size: 3.25rem;
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.03em;
  color: var(--text-main);
  margin-bottom: 1.25rem;
}

.hero-title-highlight {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 2.25rem;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-guarantee {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.875rem;
  color: var(--text-muted);
}

.hero-guarantee-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.hero-card-display {
  position: relative;
}

.hero-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 2rem;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.hero-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.hero-card-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: #10b981;
}

.hero-card-status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: #10b981;
}

.hero-stat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.hero-stat-box {
  background: var(--bg-card-subtle);
  padding: 1.25rem;
  border-radius: var(--radius-md);
}

.hero-stat-val {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.2rem;
}

.hero-stat-lbl {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Decorative Floating elements */
.floating-chip {
  position: absolute;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-full);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
  border: 1px solid rgba(226, 232, 240, 0.8);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.875rem;
  font-weight: 600;
  z-index: 10;
}

.chip-1 {
  top: -15px;
  right: -10px;
}

.chip-2 {
  bottom: -20px;
  left: -15px;
}

/* --- Core Features / Advantages --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(99, 102, 241, 0.3);
}

.feature-icon-wrapper {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
}

.feature-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 0.85rem;
  color: var(--text-main);
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* --- Streaming & AI Support --- */
.support-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 3rem 2rem;
  box-shadow: var(--shadow-md);
  text-align: center;
}

.support-services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.service-item-card {
  background: var(--bg-card-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
}

.service-item-card:hover {
  background: #ffffff;
  border-color: var(--border-color);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

.service-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 700;
}

.service-icon.netflix { background: #fef2f2; color: #dc2626; }
.service-icon.youtube { background: #fef2f2; color: #ef4444; }
.service-icon.chatgpt { background: #ecfdf5; color: #059669; }
.service-icon.claude { background: #fff7ed; color: #ea580c; }
.service-icon.disney { background: #eff6ff; color: #2563eb; }

.service-name {
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-main);
}

.service-desc-text {
  font-size: 0.825rem;
  color: var(--text-muted);
}

.support-disclaimer-note {
  font-size: 0.85rem;
  color: var(--text-light);
  background: #f8fafc;
  padding: 0.85rem 1.25rem;
  border-radius: var(--radius-md);
  display: inline-block;
  border: 1px solid var(--border-color);
}

/* --- Package Comparison --- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  align-items: stretch;
}

.price-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-md);
}

.price-card.featured {
  border: 2px solid var(--color-primary);
  box-shadow: var(--shadow-lg);
  transform: scale(1.03);
}

.featured-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-primary);
  color: #ffffff;
  padding: 0.3rem 1.2rem;
  font-size: 0.8rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.price-header {
  text-align: center;
  margin-bottom: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.price-name {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.5rem;
}

.price-amount {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 2px;
  line-height: 1;
}

.price-currency {
  font-size: 1.35rem;
  font-weight: 700;
  color: #ef4444;
}

.price-value {
  font-size: 2.75rem;
  font-weight: 800;
  color: #ef4444;
  letter-spacing: -0.02em;
}

.price-original {
  font-size: 0.95rem;
  color: var(--text-light);
  text-decoration: line-through;
  margin-left: 0.3rem;
  font-weight: 400;
}

.price-period {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-weight: 400;
  margin-left: 2px;
}

.price-promo-tag {
  display: inline-block;
  margin-top: 0.65rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: #c2410c;
  background: #fff7ed;
  padding: 0.2rem 0.65rem;
  border-radius: var(--radius-full);
  border: 1px solid #ffedd5;
}

.price-features {
  margin-bottom: 2rem;
  flex-grow: 1;
}

.price-feature-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.925rem;
  color: var(--text-muted);
  margin-bottom: 0.85rem;
}

.price-feature-item svg {
  color: var(--color-primary);
  flex-shrink: 0;
}

.price-card-notice {
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-light);
  margin-top: 0.75rem;
}

/* --- FAQ Section --- */
.faq-container {
  max-width: 800px;
  margin: 0 auto;
}

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

.faq-question {
  width: 100%;
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
  background: transparent;
}

.faq-question:hover {
  color: var(--color-primary);
}

.faq-icon {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-normal);
  color: var(--text-muted);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out, padding 0.3s ease;
  padding: 0 1.5rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.65;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 1.5rem 1.25rem 1.5rem;
}

/* --- Right Side Chapter Navigation Arrows --- */
.chapter-nav-widget {
  position: fixed;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 900;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  padding: 0.5rem;
  border-radius: var(--radius-full);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.1);
  border: 1px solid var(--border-color);
  transition: opacity var(--transition-fast);
}

.chapter-arrow-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--text-muted);
  transition: all var(--transition-fast);
}

.chapter-arrow-btn:hover:not(:disabled) {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.chapter-arrow-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* --- Site Footer --- */
.site-footer {
  background: #ffffff;
  border-top: 1px solid var(--border-color);
  padding: 3.5rem 0 2rem 0;
  margin-top: 4rem;
}

.footer-top {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  margin-bottom: 2.5rem;
}

.footer-logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 0.75rem;
  font-family: var(--font-family-rounded);
}

.footer-tagline {
  color: var(--text-muted);
  font-size: 0.95rem;
  max-width: 500px;
  margin-bottom: 1.5rem;
}

.footer-links-only {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
  padding: 1rem 0;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  width: 100%;
}

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

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

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  font-size: 0.85rem;
  color: var(--text-light);
}

/* --- Inner Pages & Article Styles --- */
.page-header {
  padding: 4rem 0 2rem 0;
  text-align: center;
  background: linear-gradient(180deg, rgba(99, 102, 241, 0.04) 0%, rgba(248, 250, 252, 0) 100%);
}

.page-title {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 1rem;
}

.page-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 650px;
  margin: 0 auto;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(99, 102, 241, 0.3);
}

.article-meta {
  font-size: 0.85rem;
  color: var(--text-light);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.article-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.75rem;
  line-height: 1.35;
}

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

.article-excerpt {
  font-size: 0.925rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.article-read-more {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

/* Single Article Content Detail */
.article-detail-container {
  max-width: 820px;
  margin: 0 auto;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  padding: 3rem 2.5rem;
  box-shadow: var(--shadow-sm);
}

.article-content {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-main);
}

.article-content h2 {
  font-size: 1.6rem;
  font-weight: 700;
  margin: 2.25rem 0 1rem 0;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-main);
}

.article-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 1.75rem 0 0.75rem 0;
  color: var(--text-main);
}

.article-content p {
  margin-bottom: 1.25rem;
  color: var(--text-muted);
}

.article-content ul, .article-content ol {
  margin: 1rem 0 1.5rem 1.5rem;
  color: var(--text-muted);
}

.article-content li {
  margin-bottom: 0.5rem;
}

.article-content a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

.article-callout {
  background: var(--color-primary-light);
  border-left: 4px solid var(--color-primary);
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius-md);
  margin: 1.75rem 0;
  font-size: 0.95rem;
  color: var(--text-main);
}

.article-callout p {
  margin-bottom: 0;
  color: var(--text-main);
}

/* Website Directory (Sitemap HTML) */
.directory-section {
  margin-bottom: 2.5rem;
}

.directory-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-primary-light);
  color: var(--text-main);
}

.directory-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1rem;
}

.directory-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  transition: all var(--transition-fast);
}

.directory-item:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

.directory-item a {
  font-weight: 600;
  color: var(--text-main);
  display: block;
  margin-bottom: 0.25rem;
}

.directory-item a:hover {
  color: var(--color-primary);
}

.directory-item p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* --- Responsive Layout (Media Queries) --- */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .hero-content {
    max-width: 100%;
    text-align: center;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-guarantee {
    justify-content: center;
  }

  .features-grid, .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
  }

  .price-card.featured {
    transform: none;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }

  .hero-title {
    font-size: 2.25rem;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .mobile-nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background: #ffffff;
    flex-direction: column;
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
    gap: 1.25rem;
    transform: translateY(-150%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
  }

  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .header-cta {
    display: none;
  }

  .chapter-nav-widget {
    right: 10px;
    padding: 0.35rem;
  }

  .chapter-arrow-btn {
    width: 36px;
    height: 36px;
  }

  .article-detail-container {
    padding: 2rem 1.25rem;
  }
}