/* ═══════════════════════════════════════════
   e-CNY — Feuille de styles principale
   ═══════════════════════════════════════════ */

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

/* ─── VARIABLES ─── */
:root {
  --red:    #c0392b;
  --gold:   #d4a843;
  --ink:    #0d0d0d;
  --paper:  #f5f0e8;
  --mist:   #e8e1d4;
  --dark:   #1a1208;
  --accent: #8b1a1a;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'DM Mono', monospace;
  background: var(--paper);
  color: var(--ink);
  overflow-x: hidden;
}

/* ─── NOISE TEXTURE OVERLAY ─── */
body::before {
  content: '';
  position: fixed; inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none; z-index: 9999; opacity: 0.4;
}

/* ─── HERO ─── */
header {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  background: var(--dark);
  color: var(--paper);
  position: relative;
  overflow: hidden;
}

header::after {
  content: '¥';
  position: absolute;
  right: -4vw; top: -4vh;
  font-family: 'Noto Serif SC', serif;
  font-size: 55vw;
  color: rgba(192,57,43,0.07);
  line-height: 1;
  pointer-events: none;
  animation: drift 20s ease-in-out infinite alternate;
}

@keyframes drift {
  from { transform: rotate(-3deg) scale(1); }
  to   { transform: rotate(3deg) scale(1.04); }
}

header::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 6px;
  background: var(--red);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 2rem 4rem;
  position: relative; z-index: 2;
}

.logo {
  font-family: 'Playfair Display', serif;
  font-size: 1.5rem;
  letter-spacing: 0.15em;
  color: var(--gold);
}
.logo span { color: var(--red); }

nav ul { list-style: none; display: flex; gap: 2.5rem; }
nav a {
  color: var(--mist);
  text-decoration: none;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0.7;
  transition: opacity 0.2s, color 0.2s;
}
nav a:hover { opacity: 1; color: var(--gold); }

.hero-body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 2rem 4rem 2rem 6rem;
  position: relative; z-index: 2;
}

.hero-tag {
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--red);
  margin-bottom: 1.5rem;
  display: flex; align-items: center; gap: 0.75rem;
}
.hero-tag::before {
  content: '';
  display: inline-block;
  width: 2rem; height: 1px;
  background: var(--red);
}

h1 {
  font-family: 'Playfair Display', serif;
  font-size: clamp(3rem, 7vw, 7rem);
  line-height: 1.05;
  color: var(--paper);
  max-width: 14ch;
  margin-bottom: 2rem;
}
h1 em { font-style: normal; color: var(--gold); }

.hero-desc {
  font-size: 0.85rem;
  line-height: 1.9;
  color: rgba(245,240,232,0.6);
  max-width: 46ch;
  margin-bottom: 3rem;
}

.hero-cta {
  display: inline-flex; align-items: center; gap: 1rem;
  background: var(--red);
  color: var(--paper);
  padding: 0.9rem 2.2rem;
  text-decoration: none;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  width: fit-content;
  transition: background 0.25s, gap 0.25s;
}
.hero-cta:hover { background: #a93226; gap: 1.5rem; }
.hero-cta svg { width: 16px; height: 16px; }

.hero-stats {
  display: flex; gap: 4rem;
  padding: 2.5rem 4rem 2.5rem 6rem;
  border-top: 1px solid rgba(245,240,232,0.1);
  position: relative; z-index: 2;
}
.stat-item { display: flex; flex-direction: column; gap: 0.3rem; }
.stat-num {
  font-family: 'Playfair Display', serif;
  font-size: 2rem;
  color: var(--gold);
}
.stat-label {
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(245,240,232,0.4);
}

/* ─── SECTIONS COMMUNES ─── */
section { padding: 7rem 4rem; }

.section-tag {
  font-size: 0.65rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--red);
  margin-bottom: 1rem;
}

h2 {
  font-family: 'Playfair Display', serif;
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 1.1;
  margin-bottom: 3.5rem;
  max-width: 20ch;
}

/* ─── DÉFINITION ─── */
#definition {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6rem;
  background: var(--paper);
}
.def-left { padding-top: 1rem; }
.def-text {
  font-size: 0.9rem;
  line-height: 2;
  color: #3a3028;
  max-width: 52ch;
}
.def-right {
  display: flex;
  align-items: center;
  justify-content: center;
}

.yuan-card {
  width: 340px;
  aspect-ratio: 1.6;
  background: linear-gradient(135deg, var(--dark) 0%, #2d1a0a 100%);
  border-radius: 4px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
  box-shadow: 0 40px 80px rgba(0,0,0,0.25);
}
.yuan-card::before {
  content: '数字人民币';
  position: absolute;
  right: -1rem; bottom: -1.5rem;
  font-family: 'Noto Serif SC', serif;
  font-size: 4rem;
  color: rgba(212,168,67,0.12);
  white-space: nowrap;
}
.card-top { display: flex; justify-content: space-between; align-items: flex-start; }
.card-symbol {
  font-family: 'Playfair Display', serif;
  font-size: 2.5rem;
  color: var(--gold);
}
.card-badge {
  font-size: 0.6rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: rgba(245,240,232,0.4);
  border: 1px solid rgba(245,240,232,0.15);
  padding: 0.35rem 0.7rem;
}
.card-mid {
  font-family: 'DM Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.25em;
  color: rgba(245,240,232,0.25);
}
.card-bottom { display: flex; justify-content: space-between; align-items: flex-end; }
.card-name {
  font-family: 'Playfair Display', serif;
  font-size: 1.1rem;
  color: var(--paper);
}
.card-issuer {
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(245,240,232,0.4);
}

/* ─── AVANTAGES ─── */
#avantages { background: var(--dark); color: var(--paper); }
#avantages h2 { color: var(--paper); }

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: rgba(245,240,232,0.1);
  margin-top: 1rem;
}
.benefit-card {
  background: var(--dark);
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  transition: background 0.3s;
}
.benefit-card:hover { background: #221508; }
.benefit-icon {
  width: 44px; height: 44px;
  border: 1px solid var(--red);
  display: flex; align-items: center; justify-content: center;
  color: var(--red);
  font-size: 1.2rem;
}
.benefit-title {
  font-family: 'Playfair Display', serif;
  font-size: 1.1rem;
  color: var(--paper);
}
.benefit-text {
  font-size: 0.78rem;
  line-height: 1.85;
  color: rgba(245,240,232,0.5);
}

/* ─── IMPACT ─── */
#impact {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 6rem;
  background: var(--mist);
  align-items: start;
}
.impact-items { display: flex; flex-direction: column; gap: 0; }
.impact-item {
  padding: 2.2rem 0;
  border-bottom: 1px solid rgba(13,13,13,0.1);
  display: grid;
  grid-template-columns: 2rem 1fr;
  gap: 1.5rem;
  align-items: start;
  cursor: default;
  transition: padding-left 0.3s;
}
.impact-item:hover { padding-left: 0.5rem; }
.impact-item:first-child { border-top: 1px solid rgba(13,13,13,0.1); }
.impact-num {
  font-family: 'Playfair Display', serif;
  font-size: 0.75rem;
  color: var(--red);
  padding-top: 0.2rem;
}
.impact-content h3 {
  font-family: 'Playfair Display', serif;
  font-size: 1.1rem;
  margin-bottom: 0.6rem;
}
.impact-content p {
  font-size: 0.8rem;
  line-height: 1.9;
  color: #5a4e40;
}
.impact-visual { position: sticky; top: 5rem; }
.impact-chart {
  background: var(--dark);
  padding: 2.5rem;
  color: var(--paper);
}
.chart-title {
  font-size: 0.65rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: rgba(245,240,232,0.4);
  margin-bottom: 2rem;
}
.bar-group { display: flex; flex-direction: column; gap: 1.2rem; }
.bar-row { display: flex; align-items: center; gap: 1rem; }
.bar-label {
  font-size: 0.7rem;
  color: rgba(245,240,232,0.5);
  width: 7rem;
  flex-shrink: 0;
  text-align: right;
}
.bar-track {
  flex: 1;
  height: 4px;
  background: rgba(245,240,232,0.08);
  position: relative;
}
.bar-fill {
  height: 100%;
  background: var(--red);
  position: relative;
  transform-origin: left;
  animation: grow 1.4s cubic-bezier(0.16, 1, 0.3, 1) both;
}
@keyframes grow { from { transform: scaleX(0); } to { transform: scaleX(1); } }
.bar-fill::after {
  content: attr(data-val);
  position: absolute;
  right: -2.5rem; top: 50%;
  transform: translateY(-50%);
  font-size: 0.65rem;
  color: var(--gold);
}

/* ─── NOTE ─── */
#note {
  background: var(--red);
  color: var(--paper);
  padding: 4rem;
  display: flex;
  align-items: center;
  gap: 2rem;
}
.note-icon { font-size: 2rem; flex-shrink: 0; opacity: 0.7; }
.note-text { font-size: 0.82rem; line-height: 1.9; opacity: 0.85; }
.note-text strong { font-weight: 400; opacity: 1; color: var(--paper); }

/* ─── FOOTER ─── */
footer {
  background: var(--dark);
  color: rgba(245,240,232,0.35);
  padding: 3rem 4rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
}
.footer-logo {
  color: var(--gold);
  font-family: 'Playfair Display', serif;
  font-size: 1rem;
}
footer a { color: var(--gold); text-decoration: none; }
footer a:hover { text-decoration: underline; }

/* ─── SCROLL REVEAL ─── */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal.visible { opacity: 1; transform: none; }

/* ─── RESPONSIVE ─── */
@media (max-width: 900px) {
  nav ul { display: none; }
  nav { padding: 1.5rem 2rem; }
  .hero-body { padding: 2rem; }
  .hero-stats { flex-wrap: wrap; gap: 2rem; padding: 2rem; }
  section { padding: 4rem 2rem; }
  #definition, #impact { grid-template-columns: 1fr; gap: 3rem; }
  .benefits-grid { grid-template-columns: 1fr 1fr; }
  footer { flex-direction: column; gap: 1rem; text-align: center; }
}
@media (max-width: 560px) {
  h1 { font-size: 2.8rem; }
  .benefits-grid { grid-template-columns: 1fr; }
  .yuan-card { width: 100%; }
}