:root {
  --bg: #0d1117;
  --bg-alt: #131a23;
  --surface: #161d27;
  --surface-2: #1c2531;
  --border: #24303d;
  --text: #e8edf3;
  --text-dim: #93a1b1;
  --text-faint: #5f6d7d;
  --accent: #e8b563;
  --accent-soft: #f2d5a0;
  --teal: #5ec5b4;
  --violet: #a98bd6;

  --font-display: 'Space Grotesk', 'Noto Serif SC', system-ui, sans-serif;
  --font-serif: 'Noto Serif SC', Georgia, serif;
  --font-body: 'Inter', 'Noto Serif SC', system-ui, sans-serif;

  --maxw: 1120px;
  --radius: 14px;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

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

::selection { background: var(--accent); color: #0d1117; }

/* ── Nav ── */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(13, 17, 23, .82);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, background .3s;
}
.nav.scrolled { border-bottom-color: var(--border); }
.nav-inner {
  max-width: var(--maxw); margin: 0 auto;
  padding: 0 28px; height: 66px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.brand { display: flex; align-items: center; gap: 11px; text-decoration: none; color: var(--text); }
.brand-mark {
  width: 32px; height: 32px; border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), #d9843f);
  color: #14181f; font-family: var(--font-display); font-weight: 700;
  font-size: 13px; letter-spacing: -.3px;
  display: flex; align-items: center; justify-content: center;
}
.brand-text { font-family: var(--font-display); font-weight: 600; font-size: 15px; letter-spacing: .2px; }
.nav-links { display: flex; gap: 30px; }
.nav-links a {
  color: var(--text-dim); text-decoration: none; font-size: 14px;
  transition: color .2s; position: relative;
}
.nav-links a:hover { color: var(--text); }
.nav-links a::after {
  content: ''; position: absolute; left: 0; bottom: -5px; height: 1px; width: 0;
  background: var(--accent); transition: width .25s;
}
.nav-links a:hover::after { width: 100%; }
.nav-right { display: flex; align-items: center; gap: 14px; }
.sync-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--teal); box-shadow: 0 0 0 3px rgba(94,197,180,.16);
  animation: breathe 2.6s ease-in-out infinite;
}
@keyframes breathe { 0%,100% { opacity: 1; } 50% { opacity: .45; } }
.lang-toggle {
  background: transparent; border: 1px solid var(--border); color: var(--text-dim);
  padding: 5px 13px; border-radius: 20px; cursor: pointer;
  font-family: var(--font-display); font-size: 12px; font-weight: 600;
  letter-spacing: .4px; transition: all .2s;
}
.lang-toggle:hover { border-color: var(--accent); color: var(--accent); }

/* ── Hero ── */
.hero { position: relative; padding: 150px 28px 90px; overflow: hidden; }
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(900px 480px at 78% 8%, rgba(232,181,99,.13), transparent 62%),
    radial-gradient(700px 420px at 12% 42%, rgba(94,197,180,.10), transparent 60%),
    radial-gradient(600px 380px at 55% 95%, rgba(169,139,214,.08), transparent 60%);
}
.hero-bg::after {
  content: ''; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.022) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 75% 60% at 50% 35%, #000 40%, transparent 100%);
}
.hero-inner { position: relative; z-index: 1; max-width: var(--maxw); margin: 0 auto; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 7px 15px; border: 1px solid var(--border); border-radius: 30px;
  background: rgba(22,29,39,.7); font-size: 12.5px; color: var(--text-dim);
  margin-bottom: 30px; letter-spacing: .3px;
}
.pulse {
  width: 6px; height: 6px; border-radius: 50%; background: var(--accent);
  animation: breathe 2s ease-in-out infinite;
}
.hero-title {
  font-family: var(--font-serif); font-weight: 700;
  font-size: clamp(34px, 5.6vw, 66px); line-height: 1.22;
  letter-spacing: -.5px; margin-bottom: 26px;
}
.ht-line { display: block; }
.ht-accent {
  background: linear-gradient(96deg, var(--accent) 8%, var(--accent-soft) 52%, var(--teal) 96%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.hero-desc {
  font-size: clamp(15px, 1.6vw, 18px); color: var(--text-dim);
  max-width: 620px; margin-bottom: 38px; line-height: 1.85;
}
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 66px; }
.btn {
  padding: 12px 26px; border-radius: 10px; text-decoration: none;
  font-size: 14.5px; font-weight: 500; transition: all .22s;
  font-family: var(--font-body); border: 1px solid transparent;
}
.btn-primary { background: var(--accent); color: #14181f; }
.btn-primary:hover { background: var(--accent-soft); transform: translateY(-2px); }
.btn-ghost { border-color: var(--border); color: var(--text); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }

.hero-stats {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1px; background: var(--border);
  border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden;
}
.stat { background: var(--bg); padding: 24px 22px; }
.stat-value {
  font-family: var(--font-display); font-size: 32px; font-weight: 700;
  color: var(--accent); letter-spacing: -1px; line-height: 1.1;
}
.stat-label { font-size: 13px; color: var(--text-dim); margin-top: 7px; }
.hero-scroll { position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%); z-index: 2; }
.hero-scroll span {
  display: block; width: 1px; height: 42px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollHint 2.2s ease-in-out infinite;
}
@keyframes scrollHint { 0%,100% { opacity: .25; } 50% { opacity: .9; } }

/* ── Section ── */
.section { max-width: var(--maxw); margin: 0 auto; padding: 96px 28px; }
.section-alt {
  max-width: none; padding-left: max(28px, calc((100vw - var(--maxw)) / 2));
  padding-right: max(28px, calc((100vw - var(--maxw)) / 2));
  background: var(--bg-alt);
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
}
.sec-head { margin-bottom: 52px; }
.sec-index {
  font-family: var(--font-display); font-size: 12px; font-weight: 600;
  color: var(--accent); letter-spacing: 2px; display: block; margin-bottom: 12px;
}
.sec-title {
  font-family: var(--font-serif); font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 700; letter-spacing: -.4px; margin-bottom: 12px;
}
.sec-sub { color: var(--text-dim); font-size: 15px; max-width: 620px; }

/* ── Pillars ── */
.pillars { display: grid; grid-template-columns: repeat(auto-fit, minmax(290px, 1fr)); gap: 22px; }
.pillar {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px 28px;
  transition: transform .25s, border-color .25s, background .25s;
  position: relative; overflow: hidden;
}
.pillar::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: var(--pc, var(--accent)); opacity: 0; transition: opacity .25s;
}
.pillar:hover { transform: translateY(-4px); border-color: var(--pc, var(--accent)); background: var(--surface-2); }
.pillar:hover::before { opacity: 1; }
.pillar-num {
  font-family: var(--font-display); font-size: 11px; letter-spacing: 2px;
  color: var(--pc, var(--accent)); opacity: .8; margin-bottom: 18px;
}
.pillar-label {
  font-family: var(--font-serif); font-size: 27px; font-weight: 700;
  margin-bottom: 10px; letter-spacing: -.3px;
}
.pillar-claim {
  font-size: 15px; color: var(--pc, var(--accent)); font-weight: 500;
  margin-bottom: 18px; line-height: 1.6;
}
.pillar-desc { font-size: 14px; color: var(--text-dim); line-height: 1.85; margin-bottom: 22px; }
.pillar-proof {
  font-size: 12px; color: var(--text-faint); padding-top: 18px;
  border-top: 1px solid var(--border); line-height: 1.7;
}

/* ── Timeline ── */
.timeline { display: flex; flex-direction: column; gap: 4px; }
.tl-year {
  font-family: var(--font-display); font-size: 15px; font-weight: 700;
  color: var(--accent); letter-spacing: .5px; margin-top: 34px; margin-bottom: 14px;
  display: flex; align-items: center; gap: 14px;
}
.tl-year:first-child { margin-top: 0; }
.tl-year::after { content: ''; flex: 1; height: 1px; background: var(--border); }
.tl-items { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 14px; }
.tl-item {
  background: var(--surface); border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 10px; padding: 19px 21px;
  transition: transform .2s, border-color .2s;
}
.tl-item:hover { transform: translateX(4px); border-left-color: var(--accent-soft); }
.tl-title { font-size: 15px; font-weight: 500; margin-bottom: 7px; line-height: 1.5; }
.tl-note { font-size: 12.5px; color: var(--text-faint); }
.tl-item::before { content: ''; }

/* ── Content ── */
.content-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; }
.ct-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px 26px;
  display: flex; flex-direction: column;
  transition: transform .25s, border-color .25s;
}
.ct-card:hover { transform: translateY(-4px); border-color: var(--teal); }
.ct-kind {
  display: inline-flex; align-self: flex-start; align-items: center; gap: 6px;
  padding: 4px 11px; border-radius: 20px; font-size: 11.5px;
  background: rgba(94,197,180,.13); color: var(--teal);
  border: 1px solid rgba(94,197,180,.25); margin-bottom: 18px;
}
.ct-title { font-family: var(--font-serif); font-size: 19px; font-weight: 600; margin-bottom: 11px; line-height: 1.45; }
.ct-desc { font-size: 13.5px; color: var(--text-dim); line-height: 1.8; flex: 1; }
.ct-status {
  font-size: 11.5px; color: var(--text-faint); margin-top: 20px;
  padding-top: 16px; border-top: 1px solid var(--border);
  display: flex; align-items: center; gap: 7px;
}
.ct-status::before {
  content: ''; width: 5px; height: 5px; border-radius: 50%;
  background: var(--teal); flex-shrink: 0;
}
.ct-player { margin-bottom: 18px; }
.ct-player audio {
  width: 100%; height: 38px; display: block;
  filter: invert(1) hue-rotate(180deg) saturate(.4) brightness(1.1);
  opacity: .9;
}
.ct-player-links { display: flex; gap: 16px; margin-top: 10px; }
.ct-player-links a {
  font-size: 12px; color: var(--text-faint); text-decoration: none;
  border-bottom: 1px solid var(--border); padding-bottom: 2px;
  transition: color .2s, border-color .2s;
}
.ct-player-links a:hover { color: var(--teal); border-color: var(--teal); }

/* ── Voices ── */
.voices { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
.voice {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 30px 28px; position: relative;
  transition: border-color .25s;
}
.voice:hover { border-color: var(--violet); }
.voice-mark {
  font-family: var(--font-serif); font-size: 46px; line-height: .8;
  color: var(--violet); opacity: .35; margin-bottom: 16px;
}
.voice-text { font-family: var(--font-serif); font-size: 17px; line-height: 1.85; margin-bottom: 18px; }
.voice-from { font-size: 12.5px; color: var(--text-faint); }

/* ── Sync ── */
.sync-section { max-width: var(--maxw); }
.sync-card {
  background: linear-gradient(120deg, var(--surface), var(--surface-2));
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 34px 36px; display: flex; gap: 24px; align-items: flex-start;
}
.sync-icon {
  font-size: 26px; width: 50px; height: 50px; border-radius: 12px;
  background: rgba(232,181,99,.13); border: 1px solid rgba(232,181,99,.28);
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.sync-card h3 { font-family: var(--font-serif); font-size: 19px; margin-bottom: 11px; }
.sync-card p { font-size: 14px; color: var(--text-dim); line-height: 1.85; }
.sync-meta { font-size: 12.5px !important; color: var(--text-faint) !important; margin-top: 14px; }
.sync-meta code {
  background: var(--bg); padding: 2px 7px; border-radius: 5px;
  font-size: 11.5px; color: var(--teal); border: 1px solid var(--border);
}

/* ── Footer ── */
.footer { border-top: 1px solid var(--border); padding: 40px 28px; }
.footer-inner {
  max-width: var(--maxw); margin: 0 auto;
  display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap;
}
.footer-left { display: flex; align-items: center; gap: 13px; }
.footer-left > div { display: flex; flex-direction: column; }
.footer-left strong { font-family: var(--font-display); font-size: 14.5px; }
.footer-left span:not(.brand-mark) { font-size: 12.5px; color: var(--text-faint); }
.footer-right { font-size: 12.5px; color: var(--text-faint); }

/* ── Responsive ── */
@media (max-width: 760px) {
  .nav-links { display: none; }
  .section { padding: 70px 20px; }
  .hero { padding: 120px 20px 76px; }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .stat-value { font-size: 26px; }
  .sync-card { flex-direction: column; padding: 26px 24px; gap: 18px; }
}