:root {
  --ink: #16241f;
  --pine: #1f4a3e;
  --pine-2: #2d6a58;
  --gold: #c9a15b;
  --gold-2: #e8c07a;
  --paper: #f7f2e8;
  --paper-2: #efe6d4;
  --line: #ddd2bc;
  --muted: #5d6b65;
  --white: #fffcf7;
  --danger: #b23a2f;
  --ok: #1f6b4a;
  --serif: "Noto Serif SC", "Songti SC", serif;
  --sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --wrap: 1120px;
  --pad: clamp(1.1rem, 4vw, 2.4rem);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.7;
  font-size: 16px;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button, input, select, textarea { font: inherit; }
.wrap { width: min(var(--wrap), 100% - var(--pad) * 2); margin-inline: auto; }
.eyebrow {
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-size: 0.75rem;
  color: var(--gold);
  font-weight: 600;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(12px);
  background: rgba(247, 242, 232, 0.86);
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled { border-bottom-color: var(--line); }
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 1rem;
}
.brand { display: flex; align-items: center; gap: 0.7rem; }
.brand-mark { width: 36px; height: 36px; }
.brand-name { font-family: var(--serif); font-size: 1.2rem; font-weight: 700; }
.brand-en { display: block; font-size: 0.68rem; letter-spacing: 0.16em; color: var(--muted); font-weight: 500; }
.nav-links { display: flex; gap: 1.4rem; align-items: center; }
.nav-links a { color: var(--muted); font-size: 0.95rem; }
.nav-links a:hover { color: var(--pine); }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.25rem;
  border-radius: 999px;
  background: var(--pine);
  color: var(--white);
  border: 0;
  cursor: pointer;
  font-weight: 600;
}
.btn:hover { background: var(--pine-2); }
.btn-ghost {
  background: transparent;
  color: var(--pine);
  border: 1px solid var(--pine);
}
.nav-toggle {
  display: none;
  width: 42px; height: 42px;
  border: 1px solid var(--line);
  background: var(--white);
  border-radius: 8px;
}

.hero {
  padding: clamp(3rem, 8vw, 6.5rem) 0 4rem;
  background:
    radial-gradient(900px 420px at 90% -10%, rgba(201, 161, 91, 0.22), transparent 60%),
    linear-gradient(180deg, #efe8d8 0%, var(--paper) 70%);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3rem;
  align-items: center;
}
.hero h1 {
  font-family: var(--serif);
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  line-height: 1.2;
  margin: 0.6rem 0 1rem;
  font-weight: 700;
}
.hero p.lead { color: var(--muted); font-size: 1.08rem; max-width: 36em; }
.hero-actions { display: flex; gap: 0.8rem; margin-top: 1.6rem; flex-wrap: wrap; }
.hero-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 1.5rem;
  box-shadow: 0 16px 40px rgba(22, 36, 31, 0.08);
}
.hero-card h3 { font-family: var(--serif); margin-bottom: 0.8rem; }
.hero-card li {
  display: flex;
  justify-content: space-between;
  padding: 0.7rem 0;
  border-top: 1px dashed var(--line);
  color: var(--muted);
}
.hero-card li strong { color: var(--ink); font-weight: 600; }

.section { padding: 4.5rem 0; }
.section-head { margin-bottom: 2rem; max-width: 40em; }
.section-head h2 {
  font-family: var(--serif);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin-top: 0.4rem;
}
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.1rem;
}
.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.4rem;
}
.card h3 { font-family: var(--serif); margin: 0.4rem 0 0.5rem; }
.card p { color: var(--muted); font-size: 0.95rem; }
.icon {
  width: 42px; height: 42px;
  border-radius: 12px;
  background: var(--paper-2);
  display: grid; place-items: center;
  color: var(--pine);
  font-family: var(--serif);
  font-weight: 700;
}

.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.step {
  padding: 1.2rem;
  border-left: 3px solid var(--gold);
  background: var(--white);
  border-radius: 0 14px 14px 0;
}
.step b { display: block; color: var(--gold); font-size: 0.8rem; letter-spacing: 0.12em; }
.step h3 { font-family: var(--serif); font-size: 1.1rem; margin: 0.3rem 0; }
.step p { color: var(--muted); font-size: 0.92rem; }

.about {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
}
.about-panel {
  min-height: 280px;
  border-radius: 20px;
  background:
    linear-gradient(160deg, rgba(31, 74, 62, 0.92), rgba(22, 36, 31, 0.88)),
    repeating-linear-gradient(135deg, transparent 0 12px, rgba(232, 192, 122, 0.08) 12px 13px);
  color: var(--white);
  padding: 2rem;
}
.about-panel h3 { font-family: var(--serif); font-size: 1.6rem; margin: 0.4rem 0 0.8rem; }
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.8rem; margin-top: 1.4rem; }
.stats div { background: rgba(255,255,255,0.08); border-radius: 12px; padding: 0.8rem; }
.stats strong { display: block; font-family: var(--serif); font-size: 1.4rem; color: var(--gold-2); }

.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 1.5rem;
}
.form {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.4rem;
  display: grid;
  gap: 0.8rem;
}
.form label { font-size: 0.85rem; color: var(--muted); }
.form input, .form select, .form textarea {
  width: 100%;
  padding: 0.7rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--paper);
}
.form-feedback { min-height: 1.4em; font-size: 0.9rem; }
.form-feedback[data-type="error"] { color: var(--danger); }
.form-feedback[data-type="ok"] { color: var(--ok); }

.footer {
  background: var(--ink);
  color: rgba(255,252,247,0.78);
  padding: 3rem 0 1.4rem;
  margin-top: 2rem;
}
.footer a { color: rgba(255,252,247,0.78); }
.footer a:hover { color: var(--gold-2); }
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 1.5rem;
  padding-bottom: 1.6rem;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer h4 { color: var(--white); margin-bottom: 0.7rem; font-family: var(--serif); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding-top: 1.1rem;
  font-size: 0.85rem;
  color: rgba(255,252,247,0.55);
}
.footer-icp { display: flex; gap: 1rem; flex-wrap: wrap; }
.footer-icp a { color: rgba(255,252,247,0.7); }
.footer-icp a:hover { color: var(--gold-2); }

@media (max-width: 860px) {
  .nav-toggle { display: grid; place-items: center; }
  .nav-links {
    display: none;
    position: absolute;
    left: 0; right: 0; top: 72px;
    flex-direction: column;
    background: var(--paper);
    padding: 1rem var(--pad) 1.2rem;
    border-bottom: 1px solid var(--line);
    align-items: flex-start;
  }
  .nav-links.is-open { display: flex; }
  .hero-grid, .cards, .steps, .about, .contact-grid, .footer-grid {
    grid-template-columns: 1fr;
  }
}