/* ===== ОПТИМИЗИРОВАННЫЕ ПЕРЕМЕННЫЕ ===== */
:root {
  /* Основные цвета */
  --gold: #ffd696;
  --gold-warm: #B8860B;
  --gold-light: #F4A460;
  --gold-bright: #FFE55C;
  --turquoise: #006666;
  --crimson: #A0001C;
  
  /* Стекло и прозрачность */
  --glass: rgba(255,255,255,0.1);
  --glass-border: rgba(218,165,32,0.3);
  
  /* Базовая типографика */
  --font: 'Noto Sans SC', -apple-system, sans-serif;
  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-md: 1rem;
  --fs-lg: 1.125rem;
  --fs-xl: 1.25rem;
  --fs-2xl: 1.5rem;
  --fs-3xl: 1.875rem;
  --fs-4xl: 2.25rem;
  
  /* Отступы */
  --sp-xs: 4px;
  --sp-sm: 4px;
  --sp-md: 4px;
  --sp-lg: 10px;
  --sp-xl: 13px;
  --sp-2xl: 13px;
  --sp-3xl: 13px;
  
  /* Анимации */
  --ease: 0.3s ease-out;
  --ease-fast: 0.15s ease-out;
  --ease-slow: 0.6s ease-out;

  --nav-h-mobile: 48px;       /* 移动高度 */
  --nav-bg: rgba(17,21,24,.38);  /* 半透明背景，保证能看到背后从而产生模糊 */
  --nav-bg-fallback: rgba(17,21,24,.75);
  --nav-blur: 3px;           /* 模糊半径 */
  --nav-gap: 4px;
  --nav-gap-mobile: 8px;
  --nav-fs: 14px;             /* 链接字号（桌面） */
  --nav-fs-mobile: 13px;      /* 链接字号（移动） */
  --nav-radius: 10px;
  --nav-border: rgba(255,255,255,.08);
}

/* Темная тема - только отличия */
@media (prefers-color-scheme: dark) {
  :root {
    --glass: rgba(0,0,0,0.2);
    --text: #f5f5f5;
  }
}

/* ===== БАЗОВЫЕ СТИЛИ ===== */
*,*::before,*::after { box-sizing: border-box;}

html {
  font-size: var(--fs-md);
  font-family: var(--font);
  scroll-behavior: smooth;
}

body {
  color: var(--gold);
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* ===== ФОНОВАЯ АНИМАЦИЯ ===== */
.animated-background {
  position: fixed;
  inset: 0;
  z-index: -2;
  background: linear-gradient(45deg, var(--turquoise) 0%, #004d4d 25%, var(--crimson) 50%, #8B0000 75%, var(--turquoise) 100%);
  background-size: 300% 300%;
  animation: gradientShift 25s ease-in-out infinite;
}

@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  25% { background-position: 50% 100%; }
  50% { background-position: 100% 50%; }
  75% { background-position: 50% 0%; }
}

/* ===== ИСКОРКИ ===== */
.sparkles-container {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  overflow: hidden;
}

.sparkle {
  position: absolute;
  background: var(--gold-bright);
  border-radius: 50%;
  opacity: 0;
  animation: sparkleFloat linear infinite;
}

.sparkle.small { width: 3px; height: 3px; }
.sparkle.medium { width: 5px; height: 5px; }
.sparkle.large { width: 8px; height: 8px; }

@keyframes sparkleFloat {
  0%, 100% { opacity: 0; }
  10%, 90% { opacity: 1; }
  0% { transform: translateY(100vh) rotate(0deg); }
  100% { transform: translateY(-10vh) rotate(360deg); }
}

/* ===== НАВИГАЦИЯ ===== */
.glass-nav {
  position: sticky; top: 0; z-index: 1000;
  display: flex; align-items: center;
  height: var(--nav-h);
  background: var(--nav-bg);
  /* 关键：需要半透明背景 + 双写带前缀，移动Safari必需 */
  -webkit-backdrop-filter: saturate(160%) blur(var(--nav-blur));
  backdrop-filter: saturate(160%) blur(var(--nav-blur));
  border-bottom: 1px solid var(--nav-border);
  box-shadow: 0 6px 20px rgba(0,0,0,.18);
  /* iOS 刘海安全区 */
  padding-top: calc(8px + env(safe-area-inset-top));
}

.nav-container {
  display: flex; 
  align-items: center; 
  justify-content: space-between;
  width: min(1100px, 100%); 
  margin: 0 auto;
  hight: 20px;
}

.nav-logo h1 {
  color: var(--gold);
  font-size: var(--fs-xl);
  font-weight: 600;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--sp-xl);
}

.nav-link {
  color: var(--gold-light);
  text-decoration: none;
  font-weight: 500;
  padding: 5px;
  border-radius: 5px;
  transition: all var(--ease);
  border: 1px solid transparent;
}

.nav-link:hover,
.nav-link.active {
  background: #a0001c;
  border-color: var(--glass-border);
  transform: translateY(-2px);
}

/* ===== ОСНОВНОЙ КОНТЕНТ ===== */
.main-content {
  margin-top: 20px;
  min-height: calc(100vh - 80px);
}

.page {
  display: none;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--sp-lg);
  opacity: 0;
  transform: translateY(30px);
  transition: all var(--ease-slow);
}

.page.active {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

/* ===== ЗАГОЛОВКИ ===== */
.page-header {
  text-align: center;
  margin-bottom: var(--sp-3xl);
}

.page-header h2 {
  color: var(--gold);
  font-size: var(--fs-4xl);
  font-weight: 700;
  margin-bottom: var(--sp-md);
  letter-spacing: 1px;
}

.page-subtitle {
  color: var(--gold-light);
  font-size: var(--fs-lg);
  opacity: 0.9;
  font-weight: 300;
}

/* ===== СТЕКЛЯННЫЕ КАРТОЧКИ ===== */
.glass-card {
  background: var(--glass);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: var(--sp-xl);
  transition: all var(--ease);
  position: relative;
  overflow: hidden;
  margin-top: 30px;
}

.glass-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,229,92,0.1), transparent);
  transition: left var(--ease-slow);
}

.glass-card:hover {
  transform: translateY(-5px);
  border-color: var(--gold-warm);
}

.glass-card:hover::before {
  left: 100%;
}

/* ===== ИЗОБРАЖЕНИЯ ===== */
.placeholders-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--sp-xl);
  margin-bottom: var(--sp-3xl);
}

.image-placeholder {
  position: relative;
  transition: all var(--ease);
}

.placeholder-border {
  width: 100%;
  height: 100%;
  border: 1px solid var(--gold-warm);
  border-radius: 12px;
  background: rgba(218,165,32,0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--ease);
  position: relative;
  overflow: hidden;
}

.placeholder-content {
  text-align: center;
  color: var(--gold);
  aspect-ratio: 16/9;
  position: relative;
  overflow: hidden;
}

.placeholder-content img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  transition: transform var(--ease);
  cursor: zoom-in;
}

.image-placeholder:hover .placeholder-content img {
  transform: scale(1.03);
  filter: saturate(1.06) contrast(1.05);
}

/* ===== ЛАЙТБОКС ===== */
.lightbox {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 2vw;
  z-index: 1000;
  background: rgba(0,0,0,0.58);
  backdrop-filter: blur(4px);
}

.lightbox.open { display: flex; }

.lightbox-img {
  max-width: min(90vw, 1800px);
  max-height: min(90vh, 1000px);
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: 16px;
  cursor: zoom-out;
}

.lightbox-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  cursor: pointer;
  color: var(--gold);
  background: rgba(0,0,0,0.35);
  border: 1px solid rgba(218,165,32,0.55);
  transition: filter 0.25s ease, transform 0.25s ease;
}

.lightbox-close:hover {
  filter: brightness(1.15);
  transform: scale(1.05);
}

/* ===== АДАПТИВНОСТЬ ===== */
@media (max-width: 900px) {
  .placeholders-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-container {
    flex-direction: column;
    height: auto;
    padding: var(--sp-md);
    gap: var(--sp-md);
  }
  
  .main-content { margin-top: 10px; }
  
  .page-header h2 { font-size: var(--fs-3xl); }
}

@media (max-width: 480px) {
  .main-content { margin-top: 20px; }
  .page { padding: 0 var(--sp-md); }
  .glass-card { padding: var(--sp-lg); }
  .page-header h2 { font-size: var(--fs-2xl); }
}

/* ===== УЛУЧШЕНИЯ ПРОИЗВОДИТЕЛЬНОСТИ ===== */
* {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.glass-nav,
.glass-card {
  contain: layout style paint;
}

/* Отключение анимаций для пользователей с ограниченными возможностями */
@media (prefers-reduced-motion: reduce) {
  .animated-background { animation: none; }
  .sparkle { animation: none; opacity: 0; }
  * { transition: none !important; }
}

/* ===== UTILITY CLASSES ===== */
.hidden { display: none; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}
```

h1, h2, h3, h4, h5, h6 {
    margin-top: 20px;
    margin-bottom: 20px;
}

.author-card-v2{
  --bg1:#0e1117; --bg2:#1a2333; --glass:rgba(20,24,32,.55);
  --stroke:rgba(230,198,148,.22); --gold:#e6c694; --text:#eef2f6; --muted:#a9b3c1;
  position:relative; padding:22px; border-radius:18px;
  background:
    radial-gradient(140% 120% at 0% 0%, var(--bg1), var(--bg2)),
    linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02));
  border:1px solid var(--stroke); backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px); box-shadow:0 12px 40px rgba(0,0,0,.35);
  overflow:hidden;
}

.aurora-glow{
  position:absolute; inset:-30% -20% auto auto; width:60%; height:60%;
  background: conic-gradient(from 220deg at 70% 40%,
    rgba(120,220,180,.25), rgba(134,180,255,.20), rgba(120,220,180,.15), transparent 70%);
  filter: blur(30px); pointer-events:none;
}

.head h3{margin:0;color:var(--text);font-size:18px;letter-spacing:.2px}
.head h4{margin:4px 0 2px;color:var(--text);font-size:24px}
.subtitle{margin:0 0 12px;color:var(--gold)}

.bio{color:var(--text);line-height:1.78;font-size:15.5px}
.bio p{margin:10px 0}

/* Встроенный аватар — мягкая маска + обтекание текстом */
.avatar-float{
  float:left; width:220px; height:220px; margin:4px 18px 8px 0; position:relative;
  shape-outside: radial-gradient(circle at 50% 50%, transparent 60%, #000 61%);
  -webkit-mask-image: radial-gradient(50% 50% at 50% 50%, #000 70%, transparent 100%);
          mask-image: radial-gradient(50% 50% at 50% 50%, #000 70%, transparent 100%);
  clip-path: circle(50% at 50% 50%);
}
.avatar-float img{
  width:100%; height:100%; object-fit:cover; display:block; border-radius:50%;
  border:1px solid var(--stroke); box-shadow:0 8px 28px rgba(0,0,0,.35),
    0 0 0 6px rgba(230,198,148,.10);
}

/* KPI */
.facts{display:flex;gap:10px;flex-wrap:wrap;list-style:none;padding:10px 0 0;margin:8px 0 0}
.facts li{display:flex;gap:8px;align-items:baseline;padding:6px 10px;border-radius:10px;
  background:rgba(230,198,148,.08);border:1px solid var(--stroke);color:var(--text)}
.facts li strong{color:var(--gold)}

/* Галерея */
.photo-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:12px}
.photo-grid img{
  width:100%; height:160px; object-fit:cover; border-radius:12px; background:#151a22;
  box-shadow:0 6px 20px rgba(0,0,0,.25); transition: transform .25s ease, box-shadow .25s ease;
}
.photo-grid img:hover{transform:translateY(-2px); box-shadow:0 12px 28px rgba(0,0,0,.35)}

@media (max-width:900px){
  .avatar-float{float:none;margin:0 auto 10px;display:block}
  .photo-grid{grid-template-columns:repeat(2,1fr)}
}

/* Контейнер карточек */
.china-cards{display:grid;grid-template-columns:1fr;gap:14px}

/* Стеклянные карточки */
.glass-card.china-card{
  --gold: #e6c694; /* тёплый золотистый без «желтизны» */
  position:relative; border-radius:18px; padding:16px 16px 14px;
  border:1px solid var(--stroke);
  backdrop-filter: blur(5px); -webkit-backdrop-filter: blur(5px);
  box-shadow:0 12px 40px rgba(0,0,0,.35);
}
.glass-card.china-card h4{margin:0 0 8px;color:var(--text);font-size:20px;letter-spacing:.2px}
.china-content p{color:var(--text);line-height:1.75;margin:8px 0}

/* KPI-ряд (чипы) */
.china-content .kpi{display:flex;gap:10px;flex-wrap:wrap;list-style:none;padding:0;margin:0 0 8px}
.china-content .kpi li{
  display:flex;gap:8px;align-items:baseline;padding:6px 10px;border-radius:10px;
  background:rgba(230,198,148,.08);border:1px solid var(--stroke);color:var(--text)
}
.china-content .kpi li strong{color:var(--gold)}

/* Kp 半环仪表 */
.kp-gauge{margin:2px 0 6px}

/* 纬度带 */
.lat-band .band{position:relative;height:6px;border-radius:4px;background:linear-gradient(90deg,#313847,#778099);margin:4px 0 6px}
.lat-band .tick{position:absolute;top:8px;font-size:12px;color:var(--muted)}
.lat-band .tick.left{left:0}
.lat-band .tick.right{right:0}
.lat-band .hint{margin:0;color:var(--muted);font-size:12px}

/* Сетка локаций */
.china-locations{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:8px}
.location-item{padding:10px;border-radius:12px;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08)}
.location-name{display:block;color:var(--text);font-weight:600}
.location-desc{display:block;color:var(--muted);font-size:13px;margin-top:2px}

/* Исторические факты — аккуратная сетка */
.historical-facts{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:8px}
.fact-item{padding:10px;border-radius:12px;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08)}
.fact-label{display:block;color:var(--text);font-weight:600}
.fact-value{display:block;color:var(--muted);font-size:13px;margin-top:2px}

@media (max-width:900px){
  .china-locations,.historical-facts{grid-template-columns:1fr}
}