/* ============================================================
   Aicomi (爱语心通) — 浅色AI恋爱风格主题
   Colors: 爱心粉 #FF4081 | 科技蓝 #448AFF | 纯情白 #FFFAFA | 星光银 #E0E0E0
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;500;700;900&family=Noto+Sans+SC:wght@300;400;500;700&display=swap');

:root {
  /* Core palette */
  --pink-romance: #FF4081;
  --pink-light: #FF80AB;
  --pink-pale: #FFCDD2;
  --blue-tech: #448AFF;
  --blue-light: #82B1FF;
  --blue-pale: #BBDEFB;
  --white-pure: #FFFAFA;
  --silver-star: #E0E0E0;
  --silver-light: #F5F5F5;

  /* Derived */
  --bg: #FFFAFA;
  --bg-warm: #FFF0F5;
  --bg-card: #FFFFFF;
  --text: #2D2D3A;
  --text-soft: #5C5C6E;
  --text-muted: #8E8E9E;
  --accent: var(--pink-romance);
  --accent-dk: #D81B60;
  --accent-light: var(--pink-light);
  --secondary: var(--blue-tech);
  --secondary-dk: #1565C0;
  --border: var(--silver-star);
  --shadow: 0 2px 12px rgba(255, 64, 129, 0.08);
  --shadow-md: 0 4px 24px rgba(255, 64, 129, 0.12);
  --radius: 12px;
  --radius-sm: 8px;

  /* Typography */
  --font-serif: 'Noto Serif SC', serif;
  --font-sans: 'Noto Sans SC', sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', monospace;

  /* Header */
  --header-bg: #2D2D3A;
  --header-text: #FFFFFF;
  --header-border: var(--pink-romance);

  /* Semantic accents */
  --pink-fierce: var(--pink-romance);
  --danger-red: #EF5350;
  --accent-gold: #FFA726;
  --uniform-navy: var(--secondary-dk);
  --steel-light: var(--silver-star);
}

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

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

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--secondary); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--accent); }

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

/* ========== SCREEN READER ONLY ========== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ========== HEADER ========== */
header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--header-bg);
  border-bottom: 3px solid var(--header-border);
  padding: 0 24px;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--header-text);
  text-decoration: none;
}

.logo .logo-icon {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  object-fit: cover;
}

nav { display: flex; align-items: center; gap: 32px; }

nav a {
  color: rgba(255,255,255,0.75);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s;
  text-decoration: none;
}

nav a:hover,
nav a.active { color: var(--pink-romance); }

.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: linear-gradient(135deg, var(--pink-romance), var(--blue-tech));
  color: #fff;
  padding: 8px 20px;
  border-radius: 24px;
  font-size: 0.9rem;
  font-weight: 700;
  transition: transform 0.2s, box-shadow 0.2s;
  text-decoration: none;
}

.header-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(255,64,129,0.35);
  color: #fff;
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
}

/* ========== HERO (index) ========== */
.hero {
  position: relative;
  padding: 60px 24px 80px;
  text-align: center;
  background: linear-gradient(135deg, var(--blue-tech), var(--pink-romance));
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('../img/hero-bg.jpg') center/cover no-repeat;
  opacity: 0.15;
  mix-blend-mode: overlay;
}

.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 20% 50%, rgba(68,138,255,0.3) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 50%, rgba(255,64,129,0.3) 0%, transparent 60%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
}

.hero-title-main {
  font-family: var(--font-serif);
  font-size: 2.8rem;
  font-weight: 900;
  color: #fff;
  text-shadow: 0 2px 12px rgba(0,0,0,0.3);
  margin-bottom: 12px;
  line-height: 1.3;
}

.jp-subtitle {
  display: block;
  font-size: 1.1rem;
  font-weight: 400;
  color: rgba(255,255,255,0.75);
  margin-top: 6px;
  letter-spacing: 0.05em;
}

.hero-tagline {
  font-size: 1.15rem;
  color: rgba(255,255,255,0.9);
  margin-top: 12px;
  font-weight: 400;
  line-height: 1.6;
}

/* ========== SUB-PAGE HERO ========== */
.hero-subpage { padding: 40px 24px 48px; }

.hero-subpage-title {
  font-size: 2rem;
  font-weight: 700;
}

/* ========== CONTENT SECTIONS ========== */
.content-section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 64px 24px;
}

/* Alternate background sections */
.section-alt { background: var(--bg-warm); }

.section-no-padding { padding: 0; }

/* ========== SECTION HEADINGS ========== */
.section-heading {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  color: var(--accent-dk);
  margin-bottom: 8px;
}

.section-subtext {
  text-align: center;
  color: var(--text-soft);
  margin-bottom: 24px;
}

.section-heading-alt {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  color: var(--accent-dk);
  margin-bottom: 20px;
}

/* Content section h2 (styled like h1 for sub-pages) */
.content-section h2 {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
}

/* ========== PROSE ========== */
.prose-centered {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 32px;
  color: var(--text-soft);
  line-height: 1.85;
  font-size: 0.95rem;
}

.prose-centered:last-of-type { margin-bottom: 40px; }

/* ========== GAME INFO CARDS (index) ========== */
.game-info-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 900px;
  margin: 0 auto 48px;
}

.game-info-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 24px 16px;
  text-align: center;
  box-shadow: var(--shadow);
  border-left: 3px solid var(--accent);
  transition: transform 0.2s, box-shadow 0.2s;
}

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

.game-info-card .info-icon {
  font-size: 1.8rem;
  margin-bottom: 8px;
}

.game-info-card .info-value {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-dk);
}

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

.game-info-desc {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 0;
}

/* ========== FEATURE CARDS (index) ========== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 32px 24px;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--blue-tech);
  transition: transform 0.2s, box-shadow 0.2s;
}

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

.feature-card .feature-icon {
  font-size: 2.2rem;
  margin-bottom: 16px;
}

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

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

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

.gallery-grid img {
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: var(--shadow);
  aspect-ratio: 16/9;
  object-fit: cover;
}

.gallery-grid img:hover {
  transform: scale(1.03);
  box-shadow: var(--shadow-md);
}

/* Lightbox */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0,0,0,0.9);
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.lightbox.active { display: flex; }

.lightbox img {
  max-width: 90vw;
  max-height: 90vh;
  border-radius: 8px;
}

.lightbox-close {
  position: absolute;
  top: 20px;
  right: 30px;
  color: #fff;
  font-size: 2rem;
  cursor: pointer;
  z-index: 2001;
}

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

.review-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--shadow);
  border-top: 3px solid var(--accent-light);
}

.review-card .review-stars {
  color: var(--accent-gold);
  font-size: 1.1rem;
  margin-bottom: 12px;
  letter-spacing: 2px;
}

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

.review-card .review-author {
  margin-top: 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ========== CTA BANNER (index) ========== */
.cta-banner {
  text-align: center;
  padding: 48px 24px;
  background: linear-gradient(135deg, var(--pink-romance), var(--blue-tech));
  color: #fff;
  border-radius: 16px;
  max-width: 800px;
  margin: 0 auto;
}

.cta-banner h2 {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.cta-banner p {
  font-size: 1rem;
  opacity: 0.9;
  margin-bottom: 24px;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #fff;
  color: var(--pink-romance);
  padding: 14px 40px;
  border-radius: 32px;
  font-size: 1.1rem;
  font-weight: 700;
  transition: transform 0.2s, box-shadow 0.2s;
  text-decoration: none;
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.25);
  color: var(--accent-dk);
}

/* ========== GUIDE PAGE (guide.html) ========== */
.guide-intro {
  color: var(--text-soft);
  font-size: 0.95rem;
  line-height: 1.85;
  margin-bottom: 32px;
}

.guide-intro-top { margin-top: 0; }

.route-heading {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent-dk);
  margin-top: 32px;
  margin-bottom: 12px;
}

.route-desc {
  color: var(--text-soft);
  font-size: 0.95rem;
  line-height: 1.85;
  margin-bottom: 24px;
}

.guide-step {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--blue-tech);
}

.guide-step h3 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}

.guide-step h3::before {
  content: '✦ ';
  color: var(--accent);
}

.guide-step p {
  font-size: 0.9rem;
  color: var(--text-soft);
  line-height: 1.75;
}

.guide-steps-wrapper { counter-reset: guide-step; }

.tip-box {
  background: linear-gradient(135deg, var(--blue-pale), var(--pink-pale));
  border-radius: var(--radius);
  padding: 20px 24px;
  margin: 24px 0;
  border-left: 4px solid var(--blue-tech);
}

.tip-box strong { color: var(--secondary-dk); }

/* ========== STORY PAGE (story.html) ========== */
.story-intro {
  color: var(--text-soft);
  font-size: 0.95rem;
  line-height: 1.85;
  margin-bottom: 32px;
}

.chapter-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent-dk);
  margin-top: 36px;
  margin-bottom: 12px;
}

.story-block {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 24px;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--accent-light);
}

.story-block h3 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}

.story-block p {
  font-size: 0.9rem;
  color: var(--text-soft);
  line-height: 1.8;
}

/* ========== CHARACTERS PAGE (characters.html) ========== */
.section-subheading {
  text-align: center;
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent-dk);
  margin: 40px 0 24px;
}

.section-title-group-spaced { margin-top: 48px; }

.char-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.char-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
}

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

.char-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.char-card-body {
  padding: 16px;
}

.char-card-body h3 {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
}

.char-card-body .char-role {
  display: inline-block;
  background: var(--pink-pale);
  color: var(--accent-dk);
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 500;
  margin-bottom: 8px;
}

.char-card-body p {
  font-size: 0.85rem;
  color: var(--text-soft);
  line-height: 1.6;
}

.char-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}

.char-tag {
  background: var(--silver-light);
  color: var(--text-muted);
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 0.75rem;
}

/* ========== FAQ PAGE (faq.html) ========== */
.faq-intro {
  color: var(--text-soft);
  margin-bottom: 32px;
}

.faq-list { max-width: 800px; }

.faq-item {
  background: var(--bg-card);
  border-radius: var(--radius);
  margin-bottom: 12px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  padding: 20px 24px;
  text-align: left;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  transition: color 0.2s;
}

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

.faq-question .faq-icon {
  font-size: 1.2rem;
  color: var(--accent);
  transition: transform 0.3s;
  flex-shrink: 0;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 24px;
}

.faq-item.active .faq-answer {
  max-height: 1500px;
  padding: 0 24px 20px;
}

.faq-answer p {
  font-size: 0.9rem;
  color: var(--text-soft);
  line-height: 1.8;
}

.faq-note { margin-top: 16px; }

/* System Requirements */
.sys-reqs-h3 {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--uniform-navy);
  margin-top: 24px;
  margin-bottom: 12px;
}

.sys-reqs-h3:first-of-type { margin-top: 8px; }

.sys-note {
  margin-top: 20px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.table-scroll { overflow-x: auto; }

.table-reqs {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.table-reqs th {
  background: var(--blue-tech);
  color: #fff;
  padding: 10px 16px;
  text-align: left;
  font-weight: 600;
  font-size: 0.85rem;
}

.table-reqs td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--silver-star);
  color: var(--text-soft);
}

.table-reqs tr:nth-child(even) td { background: var(--bg-warm); }

.td-highlight {
  color: var(--pink-fierce);
  font-weight: 700;
}

/* ========== CONTENT LIST CLASSES ========== */
.content-list { list-style: disc; padding-left: 20px; }
.content-list-num { list-style: decimal; padding-left: 24px; }

.content-li { margin-bottom: 5px; color: var(--text-soft); }
.content-li-sm { margin-bottom: 4px; color: var(--text-soft); }
.content-li-md { margin-bottom: 8px; color: var(--text-soft); }
.content-li-lg { margin-bottom: 10px; color: var(--text-soft); }

/* ========== COLORED STRONG TAGS ========== */
.strong-pink { color: var(--pink-fierce); }
.strong-red { color: var(--danger-red); }
.strong-gold { color: var(--accent-gold); }
.strong-muted { color: var(--text-muted); }
.strong-navy { color: var(--uniform-navy); }

/* ========== FOOTER ========== */
footer {
  text-align: center;
  padding: 32px 24px;
  background: var(--header-bg);
  color: rgba(255,255,255,0.5);
  font-size: 0.85rem;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
  .game-info-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-grid { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
  .reviews-grid { grid-template-columns: 1fr; }
  .char-grid { grid-template-columns: repeat(2, 1fr); }

  .hero-title-main { font-size: 2rem; }

  nav { display: none; }
  nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--header-bg);
    padding: 20px 24px;
    gap: 16px;
    border-bottom: 3px solid var(--header-border);
  }

  .nav-toggle { display: block; }
}

@media (max-width: 480px) {
  .game-info-grid { grid-template-columns: 1fr 1fr; }
  .gallery-grid { grid-template-columns: 1fr; }
  .char-grid { grid-template-columns: 1fr; }

  .hero-title-main { font-size: 1.6rem; }
  .content-section { padding: 40px 16px; }
}