/* ========== CSS Variables ========== */
:root {
  --color-primary: #1a1818;
  --color-accent1: #c5a090;
  --color-accent2: #8e7068;
  --color-accent3: #a09898;
  --color-bg: #0f0e0e;
  --color-bg-light: #1e1c1c;
  --color-bg-card: #252222;
  --color-text: #e8e0dc;
  --color-text-muted: #a09898;
  --color-border: #3a3535;
  --color-accent1-glow: rgba(197, 160, 144, 0.25);
  --font-heading: 'Cinzel', 'Noto Sans SC', serif;
  --font-body: 'Noto Sans SC', sans-serif;
  --radius: 8px;
  --radius-lg: 12px;
  --transition: 0.3s ease;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.3);
  --max-width: 1200px;
}

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

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

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  overflow-x: hidden;
}

a {
  color: var(--color-accent1);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: #e0c0b0;
}

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

ul {
  list-style: none;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* ========== Header ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(15, 14, 14, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text);
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: 1px;
}

.logo:hover {
  color: var(--color-accent1);
}

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 6px;
}

.nav-list {
  display: flex;
  gap: 6px;
}

.nav-list a {
  color: var(--color-text-muted);
  font-size: 0.88rem;
  padding: 8px 12px;
  border-radius: var(--radius);
  transition: all var(--transition);
  display: flex;
  align-items: center;
  gap: 5px;
  white-space: nowrap;
}

.nav-list a:hover,
.nav-list a.active {
  color: var(--color-accent1);
  background: rgba(197, 160, 144, 0.1);
}

.nav-list a i {
  font-size: 0.8rem;
}

.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-text);
  font-size: 1.2rem;
  padding: 8px 12px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
}

.menu-toggle:hover {
  border-color: var(--color-accent1);
  color: var(--color-accent1);
}

/* ========== Hero Section ========== */
.hero {
  position: relative;
  padding: 100px 0 50px;
  min-height: auto;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-color: #1a1818;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  filter: blur(6px);
  transform: scale(1.05);
  z-index: 0;
}

.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to bottom, rgba(15, 14, 14, 0.65) 0%, rgba(15, 14, 14, 0.78) 50%, rgba(15, 14, 14, 0.95) 100%),
    radial-gradient(ellipse at 20% 50%, rgba(197, 160, 144, 0.08) 0%, transparent 60%);
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 20px 0 30px;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 900;
  color: var(--color-text);
  margin-bottom: 6px;
  letter-spacing: 3px;
  text-shadow: 0 2px 20px rgba(197, 160, 144, 0.3);
}

.hero-title-en {
  display: block;
  font-size: 1.2rem;
  font-weight: 400;
  color: var(--color-accent1);
  letter-spacing: 6px;
  margin-top: 4px;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--color-accent3);
  margin-bottom: 12px;
  font-weight: 300;
}

.hero-desc {
  max-width: 700px;
  margin: 0 auto 20px;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.8;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 16px;
}

.meta-tag {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  padding: 5px 14px;
  border-radius: 20px;
  font-size: 0.82rem;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.meta-tag i {
  color: var(--color-accent1);
  font-size: 0.78rem;
}

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

.feature-badge {
  background: linear-gradient(135deg, rgba(197, 160, 144, 0.15), rgba(142, 112, 104, 0.1));
  border: 1px solid rgba(197, 160, 144, 0.25);
  color: var(--color-accent1);
  padding: 4px 14px;
  border-radius: 16px;
  font-size: 0.78rem;
  font-weight: 500;
}

.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, var(--color-accent1), var(--color-accent2));
  color: var(--color-primary);
  font-size: 1.05rem;
  font-weight: 700;
  padding: 14px 40px;
  border-radius: 30px;
  transition: all var(--transition);
  box-shadow: 0 4px 20px var(--color-accent1-glow);
}

.btn-download:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(197, 160, 144, 0.4);
  color: var(--color-primary);
}

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

/* ========== Sections Common ========== */
.section {
  padding: 70px 0;
}

.section:nth-child(even) {
  background: var(--color-bg-light);
}

.section-title {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  text-align: center;
  margin-bottom: 40px;
  color: var(--color-text);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.section-title i {
  color: var(--color-accent1);
  font-size: 1.4rem;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent1), var(--color-accent2));
  border-radius: 2px;
}

/* ========== News ========== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 20px;
}

.news-card {
  display: flex;
  gap: 16px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: all var(--transition);
}

.news-card:hover {
  border-color: var(--color-accent2);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.news-date {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-width: 56px;
  background: linear-gradient(135deg, rgba(197, 160, 144, 0.12), rgba(142, 112, 104, 0.08));
  border-radius: var(--radius);
  padding: 10px 8px;
}

.news-date .day {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent1);
  line-height: 1;
}

.news-date .month {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.news-body h3 {
  font-size: 1rem;
  margin-bottom: 6px;
  color: var(--color-text);
  font-weight: 600;
}

.news-body p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 8px;
}

.news-link {
  font-size: 0.82rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.news-link:hover i {
  transform: translateX(3px);
}

.news-link i {
  transition: transform var(--transition);
  font-size: 0.75rem;
}

/* ========== Gallery ========== */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  max-width: 1000px;
  margin: 0 auto;
}

.gallery-item {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  aspect-ratio: 16 / 9;
  background: var(--color-bg-card);
}

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

.gallery-item:hover img {
  transform: scale(1.05);
}

.gallery-overlay {
  position: absolute;
  inset: 0;
  background: rgba(26, 24, 24, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition);
}

.gallery-overlay i {
  font-size: 2rem;
  color: var(--color-accent1);
}

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

/* 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);
  box-shadow: 0 0 40px rgba(0, 0, 0, 0.5);
}

.lightbox-close,
.lightbox-prev,
.lightbox-next {
  position: absolute;
  background: rgba(37, 34, 34, 0.8);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 12px 16px;
  border-radius: var(--radius);
  transition: all var(--transition);
  z-index: 10;
}

.lightbox-close:hover,
.lightbox-prev:hover,
.lightbox-next:hover {
  color: var(--color-accent1);
  border-color: var(--color-accent1);
}

.lightbox-close {
  top: 20px;
  right: 20px;
}

.lightbox-prev {
  left: 20px;
  top: 50%;
  transform: translateY(-50%);
}

.lightbox-next {
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
}

/* ========== Reviews ========== */
.reviews-summary {
  text-align: center;
  margin-bottom: 36px;
}

.rating-big {
  margin-bottom: 16px;
}

.rating-number {
  font-size: 3.5rem;
  font-weight: 900;
  color: var(--color-accent1);
  font-family: var(--font-heading);
  line-height: 1;
}

.rating-stars {
  color: #f0a030;
  font-size: 1.2rem;
  margin: 6px 0;
  display: flex;
  justify-content: center;
  gap: 3px;
}

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

.rating-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.rating-tag {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  padding: 4px 14px;
  border-radius: 16px;
  font-size: 0.8rem;
  color: var(--color-accent3);
}

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

.reviews-track {
  display: flex;
  transition: transform 0.5s ease;
  gap: 20px;
}

.review-card {
  min-width: calc(33.333% - 14px);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  flex-shrink: 0;
}

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

.review-avatar {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--color-accent1), var(--color-accent2));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-primary);
}

.review-name {
  font-weight: 600;
  font-size: 0.95rem;
}

.review-stars {
  color: #f0a030;
  font-size: 0.75rem;
  display: flex;
  gap: 2px;
}

.review-text {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.carousel-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 24px;
}

.carousel-btn {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  padding: 10px 14px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
}

.carousel-btn:hover {
  color: var(--color-accent1);
  border-color: var(--color-accent1);
}

.carousel-dots {
  display: flex;
  gap: 8px;
}

.carousel-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-border);
  cursor: pointer;
  transition: all var(--transition);
}

.carousel-dot.active {
  background: var(--color-accent1);
  transform: scale(1.2);
}

/* ========== Version History ========== */
.version-timeline {
  position: relative;
  padding-left: 40px;
}

.version-timeline::before {
  content: '';
  position: absolute;
  left: 14px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-accent1), var(--color-accent2), var(--color-border));
}

.version-item {
  position: relative;
  margin-bottom: 30px;
}

.version-marker {
  position: absolute;
  left: -33px;
  top: 6px;
  width: 14px;
  height: 14px;
  background: var(--color-accent1);
  border-radius: 50%;
  border: 3px solid var(--color-bg);
  box-shadow: 0 0 0 2px var(--color-accent1);
}

.version-content {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: all var(--transition);
}

.version-content:hover {
  border-color: var(--color-accent2);
  box-shadow: var(--shadow-sm);
}

.version-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.version-number {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-accent1);
}

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

.version-badge {
  font-size: 0.7rem;
  padding: 2px 10px;
  border-radius: 10px;
  font-weight: 600;
}

.version-badge.latest {
  background: linear-gradient(135deg, var(--color-accent1), var(--color-accent2));
  color: var(--color-primary);
}

.version-meta {
  display: flex;
  gap: 16px;
  margin-bottom: 12px;
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.version-meta i {
  color: var(--color-accent2);
  margin-right: 4px;
}

.version-changes {
  margin-bottom: 14px;
}

.version-changes li {
  position: relative;
  padding-left: 18px;
  font-size: 0.88rem;
  color: var(--color-text-muted);
  margin-bottom: 4px;
}

.version-changes li::before {
  content: '•';
  position: absolute;
  left: 4px;
  color: var(--color-accent1);
  font-weight: bold;
}

.btn-sm {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: 1px solid var(--color-accent1);
  color: var(--color-accent1);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.82rem;
  transition: all var(--transition);
}

.btn-sm:hover {
  background: var(--color-accent1);
  color: var(--color-primary);
}

/* ========== Guides ========== */
.guide-filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-bottom: 30px;
}

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

.filter-btn:hover {
  border-color: var(--color-accent2);
  color: var(--color-text);
}

.filter-btn.active {
  background: linear-gradient(135deg, var(--color-accent1), var(--color-accent2));
  color: var(--color-primary);
  border-color: transparent;
  font-weight: 600;
}

.guides-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 20px;
}

.guide-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: all var(--transition);
}

.guide-card:hover {
  border-color: var(--color-accent2);
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}

.guide-card.hidden {
  display: none;
}

.guide-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, rgba(197, 160, 144, 0.15), rgba(142, 112, 104, 0.1));
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}

.guide-icon i {
  font-size: 1.3rem;
  color: var(--color-accent1);
}

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

.guide-card p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 12px;
}

.guide-meta {
  display: flex;
  gap: 12px;
  font-size: 0.78rem;
}

.guide-difficulty {
  color: var(--color-accent3);
}

.guide-difficulty.difficulty-easy {
  color: #70b070;
}

.guide-difficulty.difficulty-hard {
  color: #d08060;
}

.guide-recommend {
  color: var(--color-accent1);
}

/* ========== Chapters ========== */
.chapters-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.chapter-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: relative;
  overflow: hidden;
  transition: all var(--transition);
}

.chapter-card:hover {
  border-color: var(--color-accent2);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.chapter-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent1), var(--color-accent2));
}

.side-chapter::before {
  background: linear-gradient(90deg, var(--color-accent3), var(--color-accent2));
}

.chapter-badge {
  display: inline-block;
  font-size: 0.7rem;
  padding: 2px 10px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--color-accent1), var(--color-accent2));
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: 8px;
}

.chapter-badge.badge-new {
  background: linear-gradient(135deg, #d08060, #c05040);
  color: #fff;
}

.chapter-badge.badge-side {
  background: linear-gradient(135deg, var(--color-accent3), var(--color-accent2));
  color: var(--color-primary);
}

.chapter-number {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 4px;
}

.chapter-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

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

.chapter-details {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

.chapter-details i {
  margin-right: 3px;
  color: var(--color-accent2);
}

.chapter-tone.tone-dark {
  color: #9090c0;
}

.chapter-tone.tone-action {
  color: #d07050;
}

.chapter-tone.tone-mystery {
  color: #80a0c0;
}

.chapter-tone.tone-warm {
  color: #c09070;
}

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

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  margin-bottom: 10px;
  overflow: hidden;
  background: var(--color-bg-card);
  transition: border-color var(--transition);
}

.faq-item:hover {
  border-color: var(--color-accent2);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: none;
  border: none;
  color: var(--color-text);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 18px 22px;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-body);
  transition: color var(--transition);
}

.faq-question:hover {
  color: var(--color-accent1);
}

.faq-icon {
  color: var(--color-accent1);
  transition: transform var(--transition);
  font-size: 0.85rem;
  flex-shrink: 0;
}

.faq-item.open .faq-icon {
  transform: rotate(180deg);
}

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

.faq-item.open .faq-answer {
  max-height: 300px;
}

.faq-answer p {
  padding: 0 22px 18px;
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ========== Footer ========== */
.site-footer {
  background: var(--color-primary);
  border-top: 1px solid var(--color-border);
  padding: 50px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 30px;
  margin-bottom: 36px;
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 14px;
  position: relative;
  padding-bottom: 8px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--color-accent1);
}

.footer-about {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.footer-links li {
  margin-bottom: 6px;
}

.footer-links a {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  transition: all var(--transition);
}

.footer-links a:hover {
  color: var(--color-accent1);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding: 20px 0;
  text-align: center;
}

.footer-legal {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  margin-bottom: 6px;
  opacity: 0.7;
}

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

/* ========== Back to Top ========== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 46px;
  height: 46px;
  background: linear-gradient(135deg, var(--color-accent1), var(--color-accent2));
  color: var(--color-primary);
  border: none;
  border-radius: 50%;
  font-size: 1.1rem;
  cursor: pointer;
  z-index: 900;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition);
  box-shadow: 0 4px 15px var(--color-accent1-glow);
}

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

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(197, 160, 144, 0.4);
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .review-card {
    min-width: calc(50% - 10px);
  }

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

@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  .main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(15, 14, 14, 0.98);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    padding: 16px 20px;
    transform: translateY(-120%);
    opacity: 0;
    transition: all 0.4s ease;
    z-index: 999;
  }

  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
  }

  .nav-list {
    flex-direction: column;
    gap: 2px;
  }

  .nav-list a {
    padding: 12px 16px;
    font-size: 0.95rem;
  }

  .hero-title {
    font-size: 2.2rem;
  }

  .hero-title-en {
    font-size: 1rem;
  }

  .section {
    padding: 50px 0;
  }

  .section-title {
    font-size: 1.5rem;
    margin-bottom: 30px;
  }

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

  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .review-card {
    min-width: 100%;
  }

  .version-timeline {
    padding-left: 30px;
  }

  .version-marker {
    left: -23px;
    width: 12px;
    height: 12px;
  }

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

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .meta-tag {
    padding: 4px 10px;
    font-size: 0.75rem;
  }

  .hero-meta {
    gap: 6px;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 15px;
  }

  .hero {
    padding: 80px 0 40px;
  }

  .hero-title {
    font-size: 1.8rem;
  }

  .hero-desc {
    font-size: 0.88rem;
  }

  .btn-download {
    padding: 12px 30px;
    font-size: 0.95rem;
  }

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

  .lightbox {
    padding: 20px;
  }

  .rating-number {
    font-size: 2.8rem;
  }
}