:root {
  --bg: #f7f5ef;
  --card: #ffffff;
  --text: #151515;
  --muted: #666666;
  --line: #e6e2d8;
  --blue: #2563eb;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}
a { color: inherit; text-decoration: none; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 7vw;
  background: rgba(247,245,239,.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}
.brand { font-weight: 700; letter-spacing: .04em; }
nav { display: flex; gap: 22px; font-size: 14px; color: var(--muted); }
nav a:hover { color: var(--blue); }
.hero {
  padding: 96px 7vw 72px;
  max-width: 1080px;
}
.eyebrow {
  color: var(--blue);
  font-size: 13px;
  letter-spacing: .12em;
  text-transform: uppercase;
}
h1 {
  margin: 16px 0 6px;
  font-size: clamp(48px, 8vw, 108px);
  line-height: 1;
  letter-spacing: -.06em;
}
h2 {
  margin: 0;
  font-size: clamp(24px, 4vw, 46px);
  letter-spacing: -.04em;
}
.intro {
  max-width: 780px;
  color: var(--muted);
  font-size: 18px;
  margin-top: 26px;
}
.hero-actions {
  display: flex;
  gap: 14px;
  margin-top: 34px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
}
.btn.primary {
  background: var(--text);
  color: #fff;
  border-color: var(--text);
}
.section {
  padding: 54px 7vw;
}
.section-title {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 24px;
}
.section-title span {
  width: 5px;
  height: 28px;
  background: var(--blue);
  border-radius: 4px;
}
.section-title h2 {
  font-size: 30px;
}
.section-desc {
  color: var(--muted);
  max-width: 820px;
  margin-top: -8px;
  margin-bottom: 24px;
}
.grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.card, .project, .contact-box, .statement {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 24px;
  box-shadow: 0 12px 34px rgba(0,0,0,.04);
}
.card h3, .project h3 {
  margin: 0 0 10px;
  font-size: 19px;
}
.card p, .project p, .contact p, .statement p {
  color: var(--muted);
  margin: 0;
}
.project-list {
  display: grid;
  gap: 14px;
}
.project {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: flex-start;
}
.project strong {
  white-space: nowrap;
  color: var(--blue);
  font-size: 14px;
  font-weight: 600;
}
.contact-box {
  max-width: 520px;
  margin-top: 18px;
}
.statement {
  background: #fdfcf8;
}
.site-footer {
  padding: 34px 7vw 42px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}
.site-footer a {
  color: var(--muted);
}
.site-footer a:hover {
  color: var(--blue);
}
@media (max-width: 860px) {
  .site-header {
    align-items: flex-start;
    gap: 14px;
    flex-direction: column;
  }
  nav {
    flex-wrap: wrap;
    gap: 12px;
  }
  .grid {
    grid-template-columns: 1fr;
  }
  .project {
    flex-direction: column;
  }
  .hero {
    padding-top: 68px;
  }
}