/* =============================================
   PQC.MAYFLY.WIKI — Design System
   Dark Cyber / Quantum theme
   ============================================= */

/* ── Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Space+Grotesk:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;700&family=Noto+Sans+JP:wght@400;500;700&display=swap');

/* ── Variables ── */
:root {
  --bg:          #080b14;
  --surface:     #0d1525;
  --surface-2:   #131c2f;
  --surface-3:   #1a2540;

  --primary:     #00d4ff;
  --primary-dim: #0096b8;
  --accent:      #a78bfa;
  --accent-dim:  #7c5fe8;
  --gold:        #f59e0b;
  --gold-dim:    #d97706;

  --text:        #e2e8f0;
  --text-dim:    #cbd5e1;
  --muted:       #94a3b8;
  --muted-2:     #64748b;
  --border:      #1e293b;
  --border-2:    #263449;

  --danger:      #ef4444;
  --danger-bg:   rgba(239,68,68,0.10);
  --warning:     #f59e0b;
  --warning-bg:  rgba(245,158,11,0.10);
  --success:     #10b981;
  --success-bg:  rgba(16,185,129,0.10);
  --info:        #00d4ff;
  --info-bg:     rgba(0,212,255,0.08);

  --font-sans:    'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Space Grotesk', 'Inter', sans-serif;
  --font-mono:    'JetBrains Mono', ui-monospace, 'Cascadia Code', monospace;

  --space-xs:  0.25rem;
  --space-sm:  0.5rem;
  --space-md:  1rem;
  --space-lg:  1.5rem;
  --space-xl:  2rem;
  --space-2xl: 3rem;
  --space-3xl: 4.5rem;
  --space-4xl: 7rem;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;

  --shadow-sm:  0 1px 3px rgba(0,0,0,0.5);
  --shadow-md:  0 4px 14px rgba(0,0,0,0.6);
  --shadow-lg:  0 12px 40px rgba(0,0,0,0.7);
  --glow-cyan:  0 0 20px rgba(0,212,255,0.25);
  --glow-purple:0 0 20px rgba(167,139,250,0.25);

  --transition: 200ms cubic-bezier(0.4,0,0.2,1);
  --nav-height: 60px;
  --max-width:  1080px;
}

/* ── Reset ── */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
html { font-size:16px; scroll-behavior:smooth; -webkit-font-smoothing:antialiased; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
}
img { max-width:100%; display:block; }
ul, ol { list-style:none; }
a { color: var(--primary); text-decoration:none; transition: color var(--transition); }
a:hover { color: var(--text); }

/* ── Container ── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}
@media (max-width: 768px) { .container { padding: 0 var(--space-md); } }

/* =============================================
   NAV
   ============================================= */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  background: rgba(8,11,20,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.site-nav .container {
  height: 100%;
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  flex-shrink: 0;
}
.nav-logo-mark {
  width: 28px; height: 28px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 6px;
  display: flex; align-items:center; justify-content:center;
  font-family: var(--font-mono);
  font-size: 0.65rem; font-weight:700;
  color: var(--bg);
  letter-spacing:-0.5px;
}
.nav-logo-text {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.05em;
}
.nav-logo-text span { color: var(--primary); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 0;
  flex: 1;
}
.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--primary);
  background: var(--info-bg);
}
.nav-cta {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--bg) !important;
  background: var(--primary);
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-sm);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: opacity var(--transition) !important;
  white-space: nowrap;
  flex-shrink: 0;
}
.nav-cta:hover { opacity: 0.85; }

/* Mobile nav */
.nav-mobile-toggle {
  display: none;
  background: none; border: none; cursor: pointer;
  color: var(--muted); padding: var(--space-sm);
}
@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-mobile-toggle { display: flex; }
  .nav-links.open {
    display: flex; flex-direction: column;
    position: absolute; top: var(--nav-height); left: 0; right: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: var(--space-md);
    gap: var(--space-xs);
  }
  .nav-links.open a { font-size: 0.85rem; }
  .nav-cta { display: none; }
}

/* =============================================
   PAGE HERO
   ============================================= */
.page-hero {
  padding: var(--space-4xl) 0 var(--space-3xl);
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content:'';
  position:absolute; top:-120px; right:-80px;
  width:500px; height:500px;
  background: radial-gradient(ellipse at center, rgba(0,212,255,0.06) 0%, transparent 70%);
  pointer-events:none;
}
.page-hero::after {
  content:'';
  position:absolute; bottom:-80px; left:-60px;
  width:400px; height:400px;
  background: radial-gradient(ellipse at center, rgba(167,139,250,0.05) 0%, transparent 70%);
  pointer-events:none;
}
.page-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--primary);
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}
.page-eyebrow::before {
  content:'';
  width:28px; height:2px;
  background: var(--primary);
  display:inline-block;
}
.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.4rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--space-lg);
  letter-spacing: -0.02em;
}
.page-hero h1 .hl-cyan { color: var(--primary); }
.page-hero h1 .hl-purple { color: var(--accent); }
.page-hero h1 .hl-gold { color: var(--gold); }
.page-hero .lead {
  font-size: 1.05rem;
  color: var(--text-dim);
  max-width: 620px;
  line-height: 1.8;
  margin-bottom: var(--space-xl);
}
.hero-actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* =============================================
   STAT BAR
   ============================================= */
.stat-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-top: var(--space-3xl);
}
.stat-cell {
  background: var(--surface);
  padding: var(--space-lg) var(--space-xl);
}
.stat-cell .stat-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin-bottom: var(--space-xs);
}
.stat-cell .stat-value {
  font-family: var(--font-display);
  font-size: 1.9rem;
  font-weight: 800;
  line-height: 1;
  color: var(--primary);
}
.stat-cell .stat-sub {
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 4px;
}
.stat-cell.danger .stat-value { color: var(--danger); }
.stat-cell.accent .stat-value { color: var(--accent); }
.stat-cell.gold .stat-value { color: var(--gold); }

@media (max-width:768px) {
  .stat-bar { grid-template-columns: repeat(2, 1fr); }
}

/* =============================================
   BUTTONS
   ============================================= */
.btn {
  display: inline-flex; align-items:center; gap: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 0.78rem; font-weight:600;
  text-transform: uppercase; letter-spacing:0.06em;
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius-md);
  border: none; cursor:pointer;
  transition: all var(--transition);
  text-decoration:none;
}
.btn-primary {
  background: var(--primary);
  color: var(--bg);
}
.btn-primary:hover { opacity:0.85; color: var(--bg); }
.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
}
.btn-outline:hover { background: var(--info-bg); color: var(--primary); }
.btn-ghost {
  background: var(--surface-2);
  color: var(--text-dim);
}
.btn-ghost:hover { background: var(--surface-3); color: var(--text); }

/* =============================================
   SECTION HEADERS
   ============================================= */
.section {
  padding: var(--space-3xl) 0;
  border-bottom: 1px solid var(--border);
}
.section:last-of-type { border-bottom: none; }
.section-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--muted);
  margin-bottom: var(--space-sm);
}
.section h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-md);
  letter-spacing:-0.01em;
}
.section .section-lead {
  color: var(--text-dim);
  max-width: 640px;
  margin-bottom: var(--space-2xl);
  font-size: 0.98rem;
}
.section h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  margin-top: var(--space-xl);
}
.section h4 {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform:uppercase;
  letter-spacing:0.1em;
  color: var(--primary);
  margin-bottom: var(--space-sm);
  margin-top: var(--space-lg);
}
.section p { margin-bottom: var(--space-md); color: var(--text-dim); }
.section p:last-child { margin-bottom: 0; }
.section li { color: var(--text-dim); margin-bottom: var(--space-sm); padding-left: var(--space-md); position:relative; }
.section li::before { content:'▸'; position:absolute; left:0; color: var(--primary); font-size:0.8em; top:0.15em; }

/* =============================================
   CARD GRID
   ============================================= */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}
.card-grid-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width:900px)  { .card-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width:600px)  { .card-grid, .card-grid-2 { grid-template-columns: 1fr; } }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-decoration: none;
  color: var(--text);
  display: flex; flex-direction:column;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.card:hover {
  border-color: var(--primary);
  box-shadow: var(--glow-cyan);
  transform: translateY(-2px);
  color: var(--text);
}
.card-icon {
  font-size: 1.4rem;
  margin-bottom: var(--space-md);
}
.card-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-bottom: var(--space-xs);
}
.card h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  line-height:1.3;
}
.card p {
  font-size: 0.85rem;
  color: var(--muted);
  line-height:1.6;
  flex:1;
}
.card-arrow {
  margin-top: var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* =============================================
   CALLOUTS
   ============================================= */
.callout {
  display: flex; gap: var(--space-md);
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  border: 1px solid;
  margin: var(--space-xl) 0;
}
.callout-icon { font-size: 1.1rem; flex-shrink:0; margin-top:2px; }
.callout-body h4 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform:uppercase;
  letter-spacing:0.1em;
  margin-bottom: var(--space-xs);
  margin-top:0;
}
.callout-body p { font-size:0.88rem; margin:0; }
.callout.danger  { background: var(--danger-bg);  border-color: rgba(239,68,68,0.3);   color: #fca5a5; }
.callout.danger  h4 { color: var(--danger); }
.callout.warning { background: var(--warning-bg); border-color: rgba(245,158,11,0.3);  color: #fde68a; }
.callout.warning h4 { color: var(--warning); }
.callout.info    { background: var(--info-bg);    border-color: rgba(0,212,255,0.2);   color: var(--text-dim); }
.callout.info    h4 { color: var(--primary); }
.callout.success { background: var(--success-bg); border-color: rgba(16,185,129,0.3);  color: #6ee7b7; }
.callout.success h4 { color: var(--success); }

/* =============================================
   TABLES
   ============================================= */
.table-wrap { overflow-x: auto; margin: var(--space-xl) 0; }
table {
  width:100%;
  border-collapse:collapse;
  font-size:0.85rem;
}
thead { background: var(--surface-2); }
thead th {
  font-family: var(--font-mono);
  font-size:0.65rem;
  text-transform:uppercase;
  letter-spacing:0.1em;
  color: var(--muted);
  padding: var(--space-md) var(--space-lg);
  text-align:left;
  border-bottom: 1px solid var(--border-2);
  white-space:nowrap;
}
tbody td {
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--border);
  color: var(--text-dim);
  vertical-align:top;
}
tbody tr:hover td { background: var(--surface); }
tbody tr:last-child td { border-bottom:none; }
.td-safe   { color: var(--success); font-family: var(--font-mono); font-size:0.8rem; }
.td-unsafe { color: var(--danger);  font-family: var(--font-mono); font-size:0.8rem; }
.td-partial{ color: var(--warning); font-family: var(--font-mono); font-size:0.8rem; }
.td-mono   { font-family: var(--font-mono); font-size:0.8rem; color: var(--text); }
.td-tag    { font-family: var(--font-mono); font-size:0.72rem; color: var(--accent); background: rgba(167,139,250,0.1); padding:2px 6px; border-radius:4px; white-space:nowrap; }

/* =============================================
   CODE / CHIPS
   ============================================= */
code {
  font-family: var(--font-mono);
  font-size: 0.82em;
  background: var(--surface-2);
  color: var(--primary);
  padding: 0.15em 0.45em;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-2);
}
.chip {
  display: inline-flex;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 3px 8px;
  border-radius: 4px;
  border: 1px solid;
  white-space:nowrap;
}
.chip-cyan   { color: var(--primary); border-color: rgba(0,212,255,0.4);   background: rgba(0,212,255,0.08); }
.chip-purple { color: var(--accent);  border-color: rgba(167,139,250,0.4); background: rgba(167,139,250,0.08); }
.chip-gold   { color: var(--gold);    border-color: rgba(245,158,11,0.4);  background: rgba(245,158,11,0.08); }
.chip-red    { color: var(--danger);  border-color: rgba(239,68,68,0.4);   background: rgba(239,68,68,0.08); }
.chip-green  { color: var(--success); border-color: rgba(16,185,129,0.4);  background: rgba(16,185,129,0.08); }
.chip-gray   { color: var(--muted);   border-color: var(--border-2);       background: var(--surface-2); }

/* =============================================
   TIMELINE (migration phases)
   ============================================= */
.timeline {
  position:relative;
  padding-left: 2.5rem;
}
.timeline::before {
  content:'';
  position:absolute; left:0.65rem; top:0; bottom:0;
  width:2px; background: linear-gradient(to bottom, var(--primary), var(--accent));
}
.timeline-item {
  position:relative;
  margin-bottom: var(--space-2xl);
}
.timeline-item::before {
  content: attr(data-n);
  position:absolute; left:-2.5rem;
  width:1.35rem; height:1.35rem;
  background: var(--surface-2);
  border: 2px solid var(--primary);
  border-radius: 50%;
  display:flex; align-items:center; justify-content:center;
  font-family: var(--font-mono); font-size:0.65rem; font-weight:700;
  color: var(--primary);
}
.timeline-item h3 {
  font-family: var(--font-display); font-size:1.05rem; font-weight:600;
  margin-bottom: var(--space-sm); margin-top:0;
}
.timeline-item p { font-size:0.88rem; margin-bottom: var(--space-sm); }

/* =============================================
   RESOURCE LINKS
   ============================================= */
.resource-section { margin-bottom: var(--space-2xl); }
.resource-section h3 {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform:uppercase;
  letter-spacing:0.12em;
  color: var(--primary);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--border);
  margin-bottom: var(--space-lg);
  margin-top:0;
}
.resource-list { display:flex; flex-direction:column; gap: var(--space-md); }
.resource-item {
  display:flex; gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  text-decoration:none;
  color: var(--text);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.resource-item:hover {
  border-color: var(--primary);
  box-shadow: 0 0 12px rgba(0,212,255,0.12);
  color: var(--text);
}
.resource-item-icon { font-size:1.1rem; flex-shrink:0; margin-top:2px; }
.resource-item-body {}
.resource-item-title {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 3px;
}
.resource-item:hover .resource-item-title { color: var(--primary); }
.resource-item-desc {
  font-size: 0.8rem;
  color: var(--muted);
  line-height:1.5;
}
.resource-item-meta {
  display:flex; gap: var(--space-sm); flex-wrap:wrap; margin-top: 4px;
}

/* =============================================
   FOOTER
   ============================================= */
.site-footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: var(--space-3xl) 0 var(--space-xl);
  margin-top: var(--space-4xl);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}
@media (max-width:900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width:600px) {
  .footer-grid { grid-template-columns: 1fr; }
}
.footer-brand h3 {
  font-family: var(--font-display);
  font-size:1.1rem; font-weight:700;
  margin-bottom: var(--space-sm); margin-top:0;
  color: var(--text);
}
.footer-brand p {
  font-size:0.82rem;
  color: var(--muted);
  max-width:240px;
  line-height:1.6;
  margin:0;
}
.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  text-transform:uppercase;
  letter-spacing:0.12em;
  color: var(--muted);
  margin-bottom: var(--space-md);
  margin-top:0;
}
.footer-col ul { display:flex; flex-direction:column; gap: var(--space-sm); }
.footer-col ul li::before { display:none; }
.footer-col ul li { padding-left:0; }
.footer-col ul a {
  font-size:0.82rem;
  color: var(--muted);
}
.footer-col ul a:hover { color: var(--primary); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: var(--space-lg);
  display:flex; justify-content:space-between; align-items:center;
  flex-wrap:wrap; gap: var(--space-md);
}
.footer-bottom p {
  font-family: var(--font-mono);
  font-size:0.65rem;
  color: var(--muted-2);
  margin:0;
}
.footer-bottom a { color: var(--muted); }
.footer-bottom a:hover { color: var(--primary); }

/* =============================================
   CTA SECTION
   ============================================= */
.cta-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-3xl);
  text-align:center;
  margin: var(--space-3xl) 0;
  position:relative; overflow:hidden;
}
.cta-section::before {
  content:'';
  position:absolute; top:-60px; left:50%; transform:translateX(-50%);
  width:300px; height:200px;
  background: radial-gradient(ellipse, rgba(0,212,255,0.08), transparent 70%);
  pointer-events:none;
}
.cta-section h2 {
  font-family: var(--font-display);
  font-size:1.8rem; font-weight:700;
  margin-bottom: var(--space-md);
  letter-spacing:-0.01em;
}
.cta-section p {
  color: var(--muted);
  max-width:460px;
  margin: 0 auto var(--space-xl);
  font-size:0.95rem;
}

/* =============================================
   LANGUAGE SWITCHER
   ============================================= */
.lang-switcher {
  position: relative;
  flex-shrink: 0;
}
.lang-switcher summary {
  list-style: none;
}
.lang-switcher summary::-webkit-details-marker { display: none; }
.lang-switcher-btn {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0.28rem 0.6rem;
  border: 1px solid var(--border-2);
  border-radius: var(--radius-sm);
  cursor: pointer;
  user-select: none;
  transition: color var(--transition), border-color var(--transition);
  display: inline-block;
  line-height: 1.6;
}
.lang-switcher-btn:hover,
.lang-switcher[open] .lang-switcher-btn {
  color: var(--primary);
  border-color: var(--primary);
}
.lang-switcher-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  background: var(--surface-2);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-md);
  padding: 0.3rem;
  min-width: 120px;
  z-index: 200;
  box-shadow: var(--shadow-md);
}
.lang-switcher-menu a {
  display: block;
  padding: 0.4rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: background var(--transition), color var(--transition);
}
.lang-switcher-menu a:hover,
.lang-switcher-menu a.lang-active {
  background: var(--info-bg);
  color: var(--primary);
}
@media (max-width: 900px) {
  .lang-switcher { display: none; }
}

/* ── CJK font stacks ── */
:lang(zh) body,
:lang(zh) p,
:lang(zh) li,
:lang(zh) td,
:lang(zh) th {
  font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
}
:lang(zh) h1, :lang(zh) h2, :lang(zh) h3, :lang(zh) h4 {
  font-family: 'Noto Sans SC', 'PingFang SC', system-ui, sans-serif;
  letter-spacing: 0.02em;
}
:lang(ja) body,
:lang(ja) p,
:lang(ja) li,
:lang(ja) td,
:lang(ja) th {
  font-family: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', system-ui, sans-serif;
}
:lang(ja) h1, :lang(ja) h2, :lang(ja) h3, :lang(ja) h4 {
  font-family: 'Noto Sans JP', system-ui, sans-serif;
  letter-spacing: 0.02em;
}

/* =============================================
   UTILITY
   ============================================= */
.text-primary  { color: var(--primary) !important; }
.text-accent   { color: var(--accent) !important; }
.text-gold     { color: var(--gold) !important; }
.text-danger   { color: var(--danger) !important; }
.text-muted    { color: var(--muted) !important; }
.text-mono     { font-family: var(--font-mono) !important; }
.text-center   { text-align: center; }
.mt-sm  { margin-top: var(--space-sm); }
.mt-md  { margin-top: var(--space-md); }
.mt-lg  { margin-top: var(--space-lg); }
.mt-xl  { margin-top: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }
.flex-wrap { display:flex; flex-wrap:wrap; gap: var(--space-sm); }
.sr-only { position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); border:0; }