:root {
  --ink: #1a2332;
  --ink-soft: #3d4a5c;
  --muted: #6b7785;
  --line: #d8dee6;
  --bg: #ffffff;
  --bg-alt: #f4f6f9;
  --navy: #0f2744;
  --accent: #1e4d8c;
  --accent-hover: #163a6b;
  --ok: #0f6b3a;
  --err: #9b1c1c;
  --radius: 10px;
  --shadow: 0 8px 28px rgba(15, 39, 68, 0.08);
  --max: 1040px;
  --narrow: 720px;
  font-family: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  font-size: 1.05rem;
}
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--accent-hover); }
.wrap { width: min(100% - 2rem, var(--max)); margin-inline: auto; }
.narrow { width: min(100% - 2rem, var(--narrow)); }

.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 20;
}
.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.5rem;
  padding: 1rem 0;
}
.brand {
  font-weight: 750;
  letter-spacing: 0.08em;
  color: var(--navy);
  text-decoration: none;
  font-size: 1.15rem;
}
.brand-zh {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
}
.nav { margin-left: auto; display: flex; gap: 1.25rem; }
.nav a { color: var(--ink-soft); text-decoration: none; font-weight: 600; font-size: 0.95rem; }
.nav a:hover { color: var(--navy); }

.hero {
  background: linear-gradient(160deg, #0f2744 0%, #1a3a5c 55%, #234872 100%);
  color: #f7f9fc;
  padding: 4.5rem 0 4rem;
}
.hero .eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  opacity: 0.8;
  margin: 0 0 0.75rem;
}
.hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1.2;
  max-width: 16ch;
  font-weight: 700;
}
.hero .lede {
  max-width: 42rem;
  color: #d7e0ec;
  margin: 0 0 1.75rem;
}
.btn {
  display: inline-block;
  background: #fff;
  color: var(--navy);
  border: none;
  border-radius: 999px;
  padding: 0.7rem 1.35rem;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  font-size: 0.98rem;
}
.btn:hover { background: #e8eef6; color: var(--navy); }
button.btn { font: inherit; }

.section { padding: 3.5rem 0; }
.section-alt { background: var(--bg-alt); }
.section h2 {
  margin: 0 0 1rem;
  font-size: 1.55rem;
  color: var(--navy);
}
.section p { color: var(--ink-soft); }

.steps {
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.75rem;
}
.steps li {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
  box-shadow: var(--shadow);
}

.contact-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1fr;
}
@media (min-width: 860px) {
  .contact-grid { grid-template-columns: 1fr 1.05fr; align-items: start; }
}
.contact-list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
  display: grid;
  gap: 1rem;
}
.contact-list .label {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 0.2rem;
}
.contact-list .note {
  display: block;
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 0.25rem;
}
.contact-list .sep { margin: 0 0.35rem; color: var(--muted); }

.contact-form {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.35rem;
  box-shadow: var(--shadow);
  display: grid;
  gap: 0.9rem;
}
.contact-form h3 { margin: 0 0 0.25rem; color: var(--navy); }
.contact-form label {
  display: grid;
  gap: 0.35rem;
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--ink-soft);
}
.req { color: var(--err); }
.contact-form input,
.contact-form textarea {
  font: inherit;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.65rem 0.75rem;
  color: var(--ink);
  background: #fff;
}
.contact-form input:focus,
.contact-form textarea:focus {
  outline: 2px solid rgba(30, 77, 140, 0.25);
  border-color: var(--accent);
}
.cf-turnstile { margin-top: 0.25rem; }
.form-status { min-height: 1.4em; margin: 0; font-size: 0.95rem; }
.form-status.ok { color: var(--ok); }
.form-status.err { color: var(--err); }
.form-fallback { margin: 0; color: var(--muted); font-size: 0.85rem; }

.site-footer {
  background: var(--navy);
  color: #d5deea;
  padding: 2.5rem 0;
  margin-top: 1rem;
}
.footer-inner { display: grid; gap: 1rem; }
.site-footer .brand-zh { color: #9eb0c7; }
.site-footer address { font-style: normal; color: #b7c4d6; line-height: 1.55; }
.fineprint { margin: 0; color: #8fa2ba; font-size: 0.85rem; }