:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  --ink: #1a1410;
  --muted: #6b5f55;
  --paper: #ffffff;
  --surface: #fdfaf5;
  --surface-warm: #fff8f0;
  --line: rgba(26, 20, 16, 0.12);
  --accent: #d4380d;
  --accent-strong: #a02800;
  --accent-glow: rgba(212, 56, 13, 0.08);
  --shadow: 0 24px 60px rgba(20, 16, 10, 0.12);
  --shadow-sm: 0 2px 12px rgba(20, 16, 10, 0.06);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--font-sans);
  line-height: 1.72;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px clamp(18px, 4vw, 56px);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  font-weight: 800;
  font-size: 18px;
  text-decoration: none;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  color: #fff;
  background: var(--accent);
  font-size: 20px;
  font-weight: 900;
}
nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  justify-content: flex-end;
  font-size: 15px;
  font-weight: 500;
}
nav a { color: var(--muted); text-decoration: none; transition: color 0.2s; }
nav a:hover { color: var(--accent); }
main { overflow: hidden; }

.hero-media {
  width: 100%;
  aspect-ratio: 21 / 9;
  overflow: hidden;
  background: linear-gradient(135deg, #fdf3e8 0%, #fee9d4 50%, #fff5eb 100%);
  display: grid;
  place-items: center;
}
.hero-media-placeholder {
  font-size: clamp(60px, 10vw, 120px);
  opacity: 0.15;
  letter-spacing: -0.02em;
}

.hero,
.section,
.page-title,
.site-footer {
  padding: clamp(48px, 8vw, 96px) clamp(18px, 5vw, 72px);
}
.band { background: var(--surface); }
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  gap: clamp(28px, 6vw, 72px);
  align-items: center;
  min-height: 72vh;
  background: linear-gradient(180deg, var(--surface), #fff);
}
.project-hero {
  background: linear-gradient(180deg, var(--surface), #fff);
}
.eyebrow {
  display: inline-block;
  margin: 0 0 14px;
  padding: 5px 14px;
  border-radius: 20px;
  color: var(--accent-strong);
  background: var(--accent-glow);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.04em;
}
h1, h2, h3, p { margin-top: 0; }
h1 {
  max-width: 920px;
  margin-bottom: 22px;
  font-size: clamp(42px, 7vw, 76px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  font-weight: 900;
}
h2 {
  max-width: 760px;
  margin-bottom: 18px;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.14;
  font-weight: 800;
}
h3 { margin-bottom: 8px; font-size: 20px; line-height: 1.3; font-weight: 700; }
.lead {
  max-width: 720px;
  color: var(--muted);
  font-size: clamp(18px, 2.2vw, 22px);
  line-height: 1.6;
}
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 24px;
  border: 1px solid var(--accent);
  border-radius: 8px;
  color: #fff;
  background: var(--accent);
  font-weight: 700;
  font-size: 16px;
  text-decoration: none;
  transition: all 0.2s;
}
.button:hover { background: var(--accent-strong); border-color: var(--accent-strong); }
.button.ghost,
.button.secondary {
  color: var(--accent);
  background: transparent;
}
.button.ghost:hover,
.button.secondary:hover { background: var(--accent-glow); color: var(--accent-strong); }

.hero-panel,
.signal-list {
  padding: clamp(22px, 4vw, 38px);
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  box-shadow: var(--shadow);
}
.hero-panel span,
.signal-list strong {
  display: block;
  color: var(--accent);
  font-weight: 800;
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.hero-panel strong {
  display: block;
  margin: 8px 0 14px;
  font-size: clamp(24px, 3vw, 38px);
  line-height: 1.12;
  color: var(--ink);
}

.compact {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  padding-top: 0;
  background: var(--line);
}
.metric {
  min-height: 140px;
  padding: 32px 28px;
  background: #fff;
}
.metric strong,
.metric span { display: block; }
.metric strong { font-size: 26px; color: var(--accent-strong); }
.metric span { color: var(--muted); margin-top: 4px; }

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(28px, 6vw, 68px);
  align-items: start;
}

.stack { display: grid; gap: 16px; }
.stack article,
.cards article,
details {
  padding: 28px 24px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  transition: box-shadow 0.2s;
}
.stack article:hover,
.cards article:hover { box-shadow: var(--shadow-sm); }

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.cards.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.advantage-card {
  padding: 28px 24px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  transition: box-shadow 0.2s;
}
.advantage-card:hover { box-shadow: var(--shadow); }
.advantage-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--accent-glow);
  display: grid;
  place-items: center;
  margin-bottom: 16px;
  font-size: 24px;
}

.proof { background: var(--surface-warm); }
.proof-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}
.proof-grid p {
  min-height: 150px;
  padding: 28px;
  border-left: 4px solid var(--accent);
  background: #fff;
  border-radius: 0 8px 8px 0;
}

.faq { display: grid; gap: 14px; max-width: 880px; }
summary {
  cursor: pointer;
  font-weight: 800;
  font-size: 17px;
  padding: 4px 0;
}

.page-title { background: var(--surface); }

.timeline ol {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: steps;
}
.timeline li {
  display: grid;
  grid-template-columns: 80px minmax(0, 1fr);
  gap: 20px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  align-items: center;
}
.timeline li::before {
  counter-increment: steps;
  content: counter(steps);
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  color: #fff;
  background: var(--accent);
  font-weight: 900;
  font-size: 22px;
}
.timeline strong,
.timeline span { display: block; }
.timeline span { color: var(--muted); font-size: 14px; }

.signal-list {
  display: grid;
  gap: 16px;
}
.signal-list p {
  margin: 0;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}
.signal-list p:last-child { border-bottom: 0; padding-bottom: 0; }
.signal-list span { display: block; color: var(--muted); }

.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
}
.stat-item {
  padding: 32px 20px;
  background: #fff;
  text-align: center;
}
.stat-num {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 900;
  color: var(--accent);
  line-height: 1;
}
.stat-label { color: var(--muted); margin-top: 8px; font-size: 14px; }

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}
.process-step {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  text-align: center;
  position: relative;
}
.process-num {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  display: grid;
  place-items: center;
  margin: 0 auto 14px;
  font-weight: 900;
  font-size: 18px;
}
.process-step h3 { font-size: 17px; margin-bottom: 6px; }
.process-step p { color: var(--muted); font-size: 14px; }

.site-footer {
  border-top: 1px solid var(--line);
  background: #fff;
}
.footer-main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.site-footer p {
  max-width: 720px;
  margin: 8px 0 0;
  color: var(--muted);
}
.site-credit {
  max-width: none;
  margin-top: 32px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: 14px;
}
.site-credit a {
  color: var(--accent-strong);
  font-weight: 800;
  text-decoration: none;
}

.cta-section {
  background: linear-gradient(135deg, var(--accent-strong), var(--accent));
  color: #fff;
  text-align: center;
  border-radius: 16px;
  margin: 0 clamp(18px, 5vw, 72px);
  padding: clamp(48px, 8vw, 72px) clamp(24px, 5vw, 48px);
}
.cta-section h2 { color: #fff; max-width: 100%; margin: 0 auto 12px; }
.cta-section .lead { color: rgba(255,255,255,0.88); margin: 0 auto 28px; }
.cta-section .button {
  background: #fff;
  color: var(--accent-strong);
  border-color: #fff;
  font-size: 17px;
  padding: 14px 32px;
}
.cta-section .button:hover { background: rgba(255,255,255,0.92); }

.contact-info {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.contact-card {
  padding: 28px 24px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  text-align: center;
}
.contact-card h3 { color: var(--accent-strong); }

@media (max-width: 820px) {
  .site-header { position: static; align-items: flex-start; flex-direction: column; }
  nav { justify-content: flex-start; }
  .hero, .split, .compact, .cards, .cards.three, .proof-grid,
  .stat-grid, .process-grid, .contact-info {
    grid-template-columns: 1fr;
  }
  .hero { min-height: auto; }
  .hero-media { aspect-ratio: 4 / 3; }
  .footer-main { align-items: flex-start; flex-direction: column; }
  .timeline li { grid-template-columns: 1fr; }
  .cta-section { margin: 0 18px; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
}