/* 夜语AI — 靛蓝紫 + 浅色背景 */
:root {
  --color-primary: #6366F1;
  --color-primary-light: #818CF8;
  --color-primary-lighter: #A5B4FC;
  --color-primary-dark: #4F46E5;
  --color-accent: #8B5CF6;
  --color-accent-soft: #A78BFA;
  --color-tag-bg: #DCE7FB;
  --color-tag-text: #3B82F6;
  --bg-page: #F4F5F7;
  --bg-card: #FFFFFF;
  --bg-input: #F1F5F9;
  --text-primary: #0F172A;
  --text-secondary: #64748B;
  --text-tertiary: #94A3B8;
  --border-color: #E2E8F0;
  --gradient-primary: linear-gradient(135deg, #6366F1, #8B5CF6);
  --gradient-hero: linear-gradient(135deg, #EEF2FF 0%, #F5F3FF 50%, #FCE7F3 100%);
  --shadow-sm: 0 2px 8px rgba(99, 102, 241, 0.08);
  --shadow-md: 0 8px 24px rgba(99, 102, 241, 0.12);
  --shadow-lg: 0 16px 48px rgba(99, 102, 241, 0.15);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --header-h: 72px;
  --transition: 0.3s ease;
  --font-sans: 'Noto Sans SC', 'Noto Sans', system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}

body {
  font-family: var(--font-sans);
  background: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

a:hover {
  color: var(--color-primary-dark);
}

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ========== Header ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-primary);
  flex-shrink: 0;
}

.logo img {
  border-radius: var(--radius-sm);
}

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

.nav-main {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-main a {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
}

.nav-main a i {
  font-size: 0.85rem;
  opacity: 0.8;
}

.nav-main a:hover,
.nav-main a.active {
  color: var(--color-primary);
  background: rgba(99, 102, 241, 0.08);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* 语言切换 */
.lang-switcher {
  position: relative;
}

.lang-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all var(--transition);
}

.lang-toggle:hover {
  border-color: var(--color-primary-light);
  color: var(--color-primary);
}

.lang-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 160px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition);
  z-index: 100;
}

.lang-switcher.open .lang-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-dropdown a {
  display: block;
  padding: 10px 16px;
  color: var(--text-secondary);
  font-size: 0.875rem;
  transition: all var(--transition);
}

.lang-dropdown a:hover {
  background: rgba(99, 102, 241, 0.06);
  color: var(--color-primary);
}

.lang-dropdown a.current {
  color: var(--color-primary);
  font-weight: 600;
  background: rgba(99, 102, 241, 0.08);
}

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: 1.1rem;
  cursor: pointer;
}

/* ========== Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

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

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

.btn-outline {
  background: var(--bg-card);
  color: var(--color-primary);
  border: 2px solid var(--color-primary-light);
}

.btn-outline:hover {
  background: rgba(99, 102, 241, 0.06);
  color: var(--color-primary-dark);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.875rem;
}

/* ========== Hero ========== */
.hero {
  padding: calc(var(--header-h) + 60px) 0 80px;
  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(99, 102, 241, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  position: relative;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
  max-width: 540px;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 28px;
}

.hero-tags span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: var(--color-tag-bg);
  color: var(--color-tag-text);
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 500;
}

.hero-tags span i {
  font-size: 0.75rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 36px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.hero-stat {
  text-align: center;
  padding: 16px 8px;
  background: rgba(255, 255, 255, 0.7);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.hero-stat .stat-number {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.2;
}

.hero-stat .stat-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

.hero-visual {
  display: flex;
  justify-content: center;
}

.hero-card {
  width: 100%;
  max-width: 420px;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.hero-card-header {
  padding: 16px 20px;
  background: var(--gradient-primary);
  color: #fff;
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
}

.hero-card-preview {
  padding: 24px 20px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.8;
  border-bottom: 1px solid var(--border-color);
}

.hero-card-preview em {
  color: var(--color-accent);
  font-style: normal;
  font-weight: 500;
}

.hero-card-meta {
  padding: 16px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.hero-card-meta .rank-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background: rgba(99, 102, 241, 0.1);
  color: var(--color-primary);
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
}

.hero-card-meta .genre-tag {
  font-size: 0.85rem;
  color: var(--text-tertiary);
}

/* ========== Section Common ========== */
section {
  padding: 80px 0;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 48px;
}

.section-label {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(99, 102, 241, 0.1);
  color: var(--color-primary);
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.section-header h2 {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1.05rem;
}

/* ========== Features ========== */
.features {
  background: var(--bg-card);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  padding: 28px;
  background: var(--bg-page);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  transition: all var(--transition);
}

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

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: #fff;
  margin-bottom: 16px;
}

.feature-icon.indigo { background: linear-gradient(135deg, #6366F1, #818CF8); }
.feature-icon.purple { background: linear-gradient(135deg, #8B5CF6, #A78BFA); }
.feature-icon.blue { background: linear-gradient(135deg, #3B82F6, #60A5FA); }
.feature-icon.pink { background: linear-gradient(135deg, #EC4899, #F472B6); }
.feature-icon.teal { background: linear-gradient(135deg, #14B8A6, #2DD4BF); }
.feature-icon.orange { background: linear-gradient(135deg, #F97316, #FB923C); }

.feature-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ========== Rankings ========== */
.rankings {
  background: var(--bg-page);
  position: relative;
  overflow: hidden;
}

.rankings::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.06) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(139, 92, 246, 0.06) 0%, transparent 40%);
  pointer-events: none;
}

.rankings .container {
  position: relative;
}

.rank-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.rank-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.rank-tab {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  border: 1px solid var(--border-color);
  border-radius: 50px;
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}

.rank-tab i {
  font-size: 0.8rem;
  opacity: 0.85;
}

.rank-tab:hover {
  border-color: var(--color-primary-light);
  color: var(--color-primary);
}

.rank-tab.active {
  background: var(--gradient-primary);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
}

.rank-tab.active i {
  opacity: 1;
}

.rank-live {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
}

.live-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22C55E;
  box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.5);
  animation: livePulse 2s infinite;
}

@keyframes livePulse {
  0% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.5); }
  70% { box-shadow: 0 0 0 8px rgba(34, 197, 94, 0); }
  100% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0); }
}

.rank-board {
  animation: rankFadeIn 0.45s ease;
}

.rank-board.is-switching {
  animation: rankFadeIn 0.35s ease;
}

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

.rank-podium {
  display: grid;
  grid-template-columns: 1fr 1.18fr 1fr;
  gap: 20px;
  align-items: end;
  margin-bottom: 20px;
}

.rank-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

.rank-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}

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

.rank-card--podium {
  padding: 24px 20px 20px;
  text-align: center;
}

.rank-card--podium.rank-card--1 {
  padding-top: 32px;
  border-color: rgba(251, 191, 36, 0.35);
  box-shadow: 0 12px 32px rgba(99, 102, 241, 0.12);
}

.rank-card--podium.rank-card--1:hover {
  transform: translateY(-6px);
}

.rank-card--podium.rank-card--2 {
  margin-bottom: 12px;
}

.rank-card--podium.rank-card--3 {
  margin-bottom: 6px;
}

.rank-card--row {
  display: grid;
  grid-template-columns: auto auto 1fr auto;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
}

.rank-card--row .rank-desc {
  display: none;
}

.rank-card--row .rank-stats {
  margin-top: 0;
}

.rank-medal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 10px;
  border-radius: 50px;
  font-weight: 800;
  font-size: 0.9rem;
  color: #fff;
  background: var(--gradient-primary);
  margin-bottom: 14px;
}

.rank-card--1 .rank-medal {
  background: linear-gradient(135deg, #FBBF24, #F59E0B);
  min-width: 42px;
  height: 42px;
  font-size: 1rem;
}

.rank-card--1 .rank-medal::before {
  content: '\f521';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  margin-right: 4px;
  font-size: 0.75rem;
}

.rank-card--2 .rank-medal {
  background: linear-gradient(135deg, #94A3B8, #64748B);
}

.rank-card--3 .rank-medal {
  background: linear-gradient(135deg, #D97706, #B45309);
}

.rank-card--row .rank-medal {
  margin-bottom: 0;
  min-width: 32px;
  height: 32px;
  font-size: 0.85rem;
}

.rank-avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: #fff;
  margin: 0 auto 14px;
  box-shadow: var(--shadow-sm);
  position: relative;
}

.rank-card--1 .rank-avatar {
  width: 88px;
  height: 88px;
  font-size: 2rem;
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.25);
}

.rank-card--row .rank-avatar {
  width: 52px;
  height: 52px;
  font-size: 1.2rem;
  margin: 0;
}

.rank-trend {
  position: absolute;
  top: -4px;
  right: -4px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #22C55E;
  color: #fff;
  font-size: 0.65rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--bg-card);
}

.theme-xuan { background: linear-gradient(135deg, #6366F1, #4F46E5); }
.theme-school { background: linear-gradient(135deg, #F472B6, #EC4899); }
.theme-scifi { background: linear-gradient(135deg, #06B6D4, #0891B2); }
.theme-wuxia { background: linear-gradient(135deg, #78716C, #57534E); }
.theme-fantasy { background: linear-gradient(135deg, #8B5CF6, #7C3AED); }
.theme-suspense { background: linear-gradient(135deg, #1E293B, #475569); }

.rank-genre {
  display: inline-block;
  padding: 3px 10px;
  background: var(--color-tag-bg);
  color: var(--color-tag-text);
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.rank-card--row .rank-genre {
  margin-bottom: 4px;
}

.rank-info h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.rank-card--1 .rank-info h3 {
  font-size: 1.15rem;
}

.rank-card--row .rank-info h3 {
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.rank-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 14px;
}

.rank-stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 4px;
}

.rank-card--row .rank-stats {
  justify-content: flex-start;
}

.rank-stat {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  background: var(--bg-input);
  border-radius: 50px;
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.rank-stat i {
  color: var(--color-primary);
  font-size: 0.7rem;
}

.rank-stat--heat i { color: #F97316; }

.rank-action {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  padding: 10px 20px;
  background: var(--gradient-primary);
  color: #fff !important;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  transition: all var(--transition);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.rank-action:hover {
  color: #fff !important;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(99, 102, 241, 0.4);
}

.rank-card--row .rank-action {
  margin-top: 0;
  padding: 8px 16px;
  font-size: 0.8rem;
  white-space: nowrap;
}

.rankings-cta {
  text-align: center;
  margin-top: 40px;
}

/* ========== Scenarios ========== */
.scenarios {
  background: var(--bg-card);
}

.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.scenario-card {
  display: flex;
  gap: 20px;
  padding: 28px;
  background: var(--bg-page);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  transition: all var(--transition);
}

.scenario-card:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-sm);
}

.scenario-icon {
  width: 56px;
  height: 56px;
  flex-shrink: 0;
  border-radius: var(--radius-md);
  background: var(--gradient-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
}

.scenario-content h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

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

.scenario-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.scenario-tags span {
  padding: 4px 10px;
  background: var(--color-tag-bg);
  color: var(--color-tag-text);
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 500;
}

/* ========== Stats ========== */
.stats {
  background: var(--gradient-primary);
  padding: 60px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}

.stat-item .stat-number {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
}

.stat-item .stat-label {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.85);
  margin-top: 8px;
}

/* ========== Testimonials ========== */
.testimonials {
  background: var(--bg-page);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial-card {
  padding: 28px;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  transition: all var(--transition);
}

.testimonial-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.testimonial-stars {
  color: #FBBF24;
  font-size: 0.9rem;
  margin-bottom: 16px;
  letter-spacing: 2px;
}

.testimonial-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 20px;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #fff;
  font-size: 1rem;
}

.author-avatar.a1 { background: linear-gradient(135deg, #6366F1, #818CF8); }
.author-avatar.a2 { background: linear-gradient(135deg, #8B5CF6, #A78BFA); }
.author-avatar.a3 { background: linear-gradient(135deg, #EC4899, #F472B6); }

.author-info strong {
  display: block;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.author-info span {
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

/* ========== CTA ========== */
.cta-section {
  background: var(--gradient-hero);
  text-align: center;
  padding: 80px 0;
}

.cta-section h2 {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 800;
  margin-bottom: 12px;
}

.cta-section p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 28px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

/* ========== FAQ ========== */
.faq {
  background: var(--bg-card);
}

.faq-list {
  max-width: 760px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  background: var(--bg-page);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  background: none;
  border: none;
  text-align: left;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition);
}

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

.faq-question i {
  flex-shrink: 0;
  transition: transform var(--transition);
  color: var(--text-tertiary);
}

.faq-item.open .faq-question i {
  transform: rotate(180deg);
  color: var(--color-primary);
}

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

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

.faq-answer-inner {
  padding: 0 20px 18px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
}

/* ========== Footer ========== */
.site-footer {
  background: var(--text-primary);
  color: rgba(255, 255, 255, 0.7);
  padding: 60px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand .logo {
  color: #fff;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.7;
  max-width: 280px;
}

.footer-col h4 {
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col a {
  color: rgba(255, 255, 255, 0.65);
  font-size: 0.875rem;
  transition: color var(--transition);
}

.footer-col a:hover {
  color: #fff;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  flex-wrap: wrap;
  gap: 16px;
}

.footer-bottom p {
  font-size: 0.85rem;
}

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

.footer-legal a {
  color: rgba(255, 255, 255, 0.65);
  font-size: 0.85rem;
}

.footer-legal a:hover {
  color: #fff;
}

/* ========== Back to Top ========== */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: #fff;
  border: none;
  font-size: 1.1rem;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: all var(--transition);
  z-index: 999;
}

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

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }

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

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .features-grid,
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .rank-podium {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .rank-card--podium.rank-card--1,
  .rank-card--podium.rank-card--2,
  .rank-card--podium.rank-card--3 {
    margin-bottom: 0;
    transform: none;
  }

  .rank-card--row {
    grid-template-columns: auto 1fr;
    grid-template-rows: auto auto;
  }

  .rank-card--row .rank-action {
    grid-column: 1 / -1;
    justify-content: center;
    margin-top: 8px;
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-main {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--bg-card);
    flex-direction: column;
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
  }

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

  .nav-main a {
    width: 100%;
    padding: 12px 16px;
  }

  .menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .lang-switcher {
    display: none;
  }

  .features-grid,
  .scenarios-grid,
  .testimonials-grid,
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .rank-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .rank-tabs {
    justify-content: center;
  }

  .rank-live {
    justify-content: center;
  }

  .rank-card--row .rank-stats {
    display: none;
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

  section {
    padding: 60px 0;
  }
}