:root {
  --primary: #170f0f;
  --secondary-1: #c2a89f;
  --secondary-2: #829596;
  --secondary-3: #838194;
  --bg-dark: #0d0808;
  --bg-card: #1e1515;
  --bg-card-hover: #2a1e1e;
  --text-light: #f0ece8;
  --text-muted: #a89e98;
  --accent-gold: #d4a574;
  --accent-warm: #c2a89f;
  --border-subtle: rgba(194, 168, 159, 0.15);
  --border-hover: rgba(194, 168, 159, 0.3);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
  --gradient-hero: linear-gradient(135deg, #170f0f 0%, #1a1218 50%, #170f0f 100%);
  --gradient-card: linear-gradient(145deg, #1e1515, #1a1218);
  --gradient-accent: linear-gradient(135deg, #c2a89f, #d4a574);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

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

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

body {
  font-family: 'Noto Sans SC', 'Inter', sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-light);
  line-height: 1.7;
  overflow-x: hidden;
}

a {
  color: var(--secondary-1);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-gold);
}

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

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

/* ==================== HEADER ==================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(13, 8, 8, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: background var(--transition-normal);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-light);
  text-decoration: none;
}

.logo img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.logo:hover {
  color: var(--accent-gold);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 4px;
}

.nav-menu a {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--text-light);
  background: rgba(194, 168, 159, 0.1);
}

.nav-menu a i {
  font-size: 0.85rem;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-light);
  border-radius: 2px;
  transition: all var(--transition-normal);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ==================== HERO ==================== */
.hero {
  padding: 100px 0 48px;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(194, 168, 159, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 40px;
  align-items: center;
}

.hero-text h1 {
  font-size: 2.4rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 12px;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-text .subtitle {
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  line-height: 1.7;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
}

.meta-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: rgba(194, 168, 159, 0.1);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.meta-tag i {
  color: var(--secondary-1);
  font-size: 0.8rem;
}

.hero-features {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.feature-badge {
  padding: 5px 12px;
  background: rgba(131, 129, 148, 0.15);
  border: 1px solid rgba(131, 129, 148, 0.25);
  border-radius: 6px;
  font-size: 0.78rem;
  color: var(--secondary-3);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 36px;
  background: var(--gradient-accent);
  color: var(--primary);
  font-size: 1rem;
  font-weight: 700;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
  box-shadow: 0 4px 20px rgba(212, 165, 116, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 30px rgba(212, 165, 116, 0.45);
  color: var(--primary);
}

.btn-primary:active {
  transform: translateY(0);
}

.hero-cover {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-subtle);
}

.hero-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.hero-cover:hover img {
  transform: scale(1.03);
}

/* ==================== SECTION COMMON ==================== */
.section {
  padding: 72px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-header h2 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-light);
}

.section-header p {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
}

.section-divider {
  width: 60px;
  height: 3px;
  background: var(--gradient-accent);
  border-radius: 3px;
  margin: 16px auto 0;
}

.section:nth-child(even) {
  background: rgba(30, 21, 21, 0.4);
}

/* ==================== NEWS ==================== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.news-card {
  background: var(--gradient-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: all var(--transition-normal);
}

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

.news-card .news-date {
  font-size: 0.8rem;
  color: var(--secondary-2);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.news-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text-light);
}

.news-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  line-height: 1.6;
}

.news-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--accent-gold);
  font-weight: 500;
}

.news-link:hover {
  gap: 10px;
}

/* ==================== GALLERY ==================== */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.gallery-item {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  border: 1px solid var(--border-subtle);
  aspect-ratio: 16/9;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.gallery-item:hover img {
  transform: scale(1.08);
}

.gallery-item .gallery-overlay {
  position: absolute;
  inset: 0;
  background: rgba(23, 15, 15, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.gallery-item:hover .gallery-overlay {
  opacity: 1;
}

.gallery-overlay i {
  font-size: 2rem;
  color: var(--text-light);
}

/* Lightbox */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0, 0, 0, 0.92);
  align-items: center;
  justify-content: center;
  padding: 40px;
}

.lightbox.active {
  display: flex;
}

.lightbox img {
  max-width: 90vw;
  max-height: 85vh;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
}

.lightbox-close {
  position: absolute;
  top: 24px;
  right: 32px;
  font-size: 2rem;
  color: var(--text-light);
  cursor: pointer;
  background: none;
  border: none;
  opacity: 0.7;
  transition: opacity var(--transition-fast);
}

.lightbox-close:hover {
  opacity: 1;
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: 2.5rem;
  color: var(--text-light);
  cursor: pointer;
  background: rgba(0, 0, 0, 0.4);
  border: none;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  opacity: 0.7;
  transition: opacity var(--transition-fast);
}

.lightbox-nav:hover {
  opacity: 1;
}

.lightbox-prev {
  left: 24px;
}

.lightbox-next {
  right: 24px;
}

/* ==================== REVIEWS ==================== */
.reviews-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-bottom: 32px;
  padding: 28px;
  background: var(--gradient-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
}

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

.stat-item .stat-number {
  font-size: 2rem;
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-item .stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.reviews-tags {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 40px;
}

.review-tag {
  padding: 6px 16px;
  background: rgba(130, 149, 150, 0.12);
  border: 1px solid rgba(130, 149, 150, 0.2);
  border-radius: 20px;
  font-size: 0.82rem;
  color: var(--secondary-2);
}

.reviews-carousel {
  position: relative;
  overflow: hidden;
}

.reviews-track {
  display: flex;
  transition: transform 0.5s ease;
}

.review-card {
  min-width: 100%;
  padding: 0 12px;
}

.review-card-inner {
  background: var(--gradient-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 32px;
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.review-stars {
  color: var(--accent-gold);
  font-size: 1.1rem;
  margin-bottom: 16px;
}

.review-card-inner blockquote {
  font-size: 1rem;
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: 20px;
  font-style: italic;
}

.review-author {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.carousel-controls {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 24px;
}

.carousel-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  color: var(--text-light);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.carousel-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
}

.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 16px;
}

.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border-subtle);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
}

.carousel-dot.active {
  background: var(--accent-gold);
  width: 24px;
  border-radius: 4px;
}

/* ==================== VERSION HISTORY ==================== */
.version-timeline {
  position: relative;
  padding-left: 32px;
}

.version-timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border-subtle);
}

.version-item {
  position: relative;
  margin-bottom: 28px;
  padding: 24px;
  background: var(--gradient-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
}

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

.version-item::before {
  content: '';
  position: absolute;
  left: -28px;
  top: 30px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent-gold);
  border: 2px solid var(--bg-dark);
}

.version-item.latest::before {
  box-shadow: 0 0 0 4px rgba(212, 165, 116, 0.3);
}

.version-header {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 12px;
}

.version-number {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent-gold);
}

.version-date {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.version-badge {
  padding: 3px 10px;
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
}

.version-badge.final {
  background: rgba(212, 165, 116, 0.15);
  color: var(--accent-gold);
}

.version-badge.update {
  background: rgba(130, 149, 150, 0.15);
  color: var(--secondary-2);
}

.version-badge.beta {
  background: rgba(131, 129, 148, 0.15);
  color: var(--secondary-3);
}

.version-content p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  line-height: 1.7;
}

.version-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.version-meta span {
  display: flex;
  align-items: center;
  gap: 5px;
}

.version-meta i {
  color: var(--secondary-2);
}

.version-download {
  margin-top: 12px;
}

.btn-sm {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  background: rgba(194, 168, 159, 0.12);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--secondary-1);
  font-size: 0.82rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn-sm:hover {
  background: rgba(194, 168, 159, 0.2);
  border-color: var(--border-hover);
  color: var(--accent-gold);
}

/* ==================== GUIDES ==================== */
.guides-filter {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}

.filter-btn {
  padding: 8px 20px;
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
  background: rgba(194, 168, 159, 0.12);
  border-color: var(--border-hover);
  color: var(--text-light);
}

.guides-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.guide-card {
  background: var(--gradient-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: all var(--transition-normal);
}

.guide-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.guide-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.guide-card-header i {
  font-size: 1.5rem;
  color: var(--secondary-1);
}

.guide-difficulty {
  display: flex;
  gap: 3px;
}

.guide-difficulty span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--border-subtle);
}

.guide-difficulty span.filled {
  background: var(--accent-gold);
}

.guide-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-light);
}

.guide-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 14px;
  line-height: 1.6;
}

.guide-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.guide-tag {
  padding: 3px 10px;
  background: rgba(131, 129, 148, 0.12);
  border-radius: 4px;
  font-size: 0.72rem;
  color: var(--secondary-3);
}

/* ==================== CHAPTERS ==================== */
.chapters-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.chapter-card {
  background: var(--gradient-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.chapter-card:hover {
  border-color: var(--border-hover);
}

.chapter-card.main::after {
  content: '主线';
  position: absolute;
  top: 12px;
  right: -24px;
  background: var(--gradient-accent);
  color: var(--primary);
  font-size: 0.68rem;
  font-weight: 700;
  padding: 3px 32px;
  transform: rotate(45deg);
}

.chapter-card.side::after {
  content: '支线';
  position: absolute;
  top: 12px;
  right: -24px;
  background: rgba(131, 129, 148, 0.6);
  color: var(--text-light);
  font-size: 0.68rem;
  font-weight: 700;
  padding: 3px 32px;
  transform: rotate(45deg);
}

.chapter-number {
  font-size: 0.78rem;
  color: var(--secondary-2);
  font-weight: 600;
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.chapter-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text-light);
}

.chapter-card .chapter-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 14px;
  line-height: 1.6;
}

.chapter-info {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.chapter-info span {
  display: flex;
  align-items: center;
  gap: 5px;
}

.chapter-info i {
  color: var(--secondary-2);
}

.chapter-mood {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border-subtle);
}

.mood-tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 12px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 500;
}

.mood-tag.adventure {
  background: rgba(212, 165, 116, 0.12);
  color: var(--accent-gold);
}

.mood-tag.mystery {
  background: rgba(131, 129, 148, 0.15);
  color: var(--secondary-3);
}

.mood-tag.romance {
  background: rgba(194, 168, 159, 0.15);
  color: var(--secondary-1);
}

.mood-tag.tension {
  background: rgba(180, 80, 80, 0.15);
  color: #d48a8a;
}

.mood-tag.important {
  background: rgba(212, 165, 116, 0.2);
  color: var(--accent-gold);
  border: 1px solid rgba(212, 165, 116, 0.3);
}

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

.faq-item {
  margin-bottom: 12px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

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

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 18px 24px;
  background: var(--gradient-card);
  border: none;
  color: var(--text-light);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  text-align: left;
  transition: all var(--transition-fast);
}

.faq-question:hover {
  background: var(--bg-card-hover);
}

.faq-question i {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: transform var(--transition-normal);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.8;
  background: var(--gradient-card);
}

/* ==================== FOOTER ==================== */
.site-footer {
  background: var(--primary);
  border-top: 1px solid var(--border-subtle);
  padding: 56px 0 0;
}

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

.footer-brand p {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-top: 12px;
  line-height: 1.7;
}

.footer-col h4 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-light);
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 8px;
}

.footer-col ul a {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.footer-col ul a:hover {
  color: var(--accent-gold);
}

.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

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

.footer-links a {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ==================== BACK TO TOP ==================== */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-accent);
  color: var(--primary);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-normal);
  z-index: 900;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr 300px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .chapters-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  html {
    font-size: 15px;
  }

  .hamburger {
    display: flex;
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(13, 8, 8, 0.98);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-subtle);
    padding: 12px;
  }

  .nav-menu.active {
    display: flex;
  }

  .nav-menu a {
    padding: 12px 16px;
  }

  .hero {
    padding: 88px 0 40px;
  }

  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-meta,
  .hero-features {
    justify-content: center;
  }

  .hero-cover {
    max-width: 320px;
    margin: 0 auto;
  }

  .hero-text h1 {
    font-size: 1.8rem;
  }

  .news-grid {
    grid-template-columns: 1fr;
  }

  .gallery-grid {
    grid-template-columns: 1fr 1fr;
  }

  .reviews-stats {
    flex-direction: column;
    gap: 20px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .section {
    padding: 52px 0;
  }

  .section-header h2 {
    font-size: 1.5rem;
  }

  .guides-grid {
    grid-template-columns: 1fr;
  }

  .lightbox-nav {
    font-size: 1.5rem;
    padding: 8px 12px;
  }

  .lightbox {
    padding: 16px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero-text h1 {
    font-size: 1.5rem;
  }

  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .meta-tag {
    font-size: 0.75rem;
    padding: 5px 10px;
  }

  .btn-primary {
    width: 100%;
    justify-content: center;
  }

  .version-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}