:root {
  --ink: #13283b;
  --muted: #4b5d6e;
  --brand: #0e5a6b;
  --brand-dark: #0a4352;
  --accent: #e3a23b;
  --bg: #ffffff;
  --bg-soft: #f3f7f8;
  --line: #dbe4e9;
  --radius: 14px;
  --max: 1080px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial,
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
}
svg { display: block; }
a { color: var(--brand); }
a:hover { color: var(--brand-dark); }

.container { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 20px; }
.skip { position: absolute; left: -999px; top: 0; }
.skip:focus { left: 16px; top: 12px; z-index: 10; background: #fff; padding: 8px 12px; border-radius: 8px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 5;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: saturate(160%) blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-weight: 700; font-size: 18px; letter-spacing: -0.01em; }
.brand:hover { color: var(--ink); }
.brand svg { width: 34px; height: 34px; flex: none; }
.nav { display: flex; align-items: center; gap: 2px; }
.nav a { color: var(--muted); text-decoration: none; font-size: 15px; padding: 8px 10px; border-radius: 8px; }
.nav a:hover { color: var(--ink); background: var(--bg-soft); }
.nav .lang { color: var(--brand); border: 1px solid var(--line); margin-left: 8px; font-weight: 600; }

/* Hero */
.hero { padding: 76px 0 68px; background: linear-gradient(180deg, #eaf3f5 0%, #ffffff 100%); border-bottom: 1px solid var(--line); }
.eyebrow {
  display: inline-block; margin: 0 0 18px; padding: 4px 12px;
  font-size: 14px; font-weight: 600; color: var(--brand);
  background: #fff; border: 1px solid var(--line); border-radius: 999px;
}
.hero h1 { margin: 0 0 18px; max-width: 19em; font-size: clamp(30px, 5vw, 46px); line-height: 1.2; letter-spacing: -0.02em; }
.hero p.sub { margin: 0 0 30px; max-width: 40em; font-size: 19px; color: var(--muted); }
.btn { display: inline-block; padding: 12px 22px; border-radius: 10px; background: var(--brand); color: #fff; font-weight: 600; text-decoration: none; }
.btn:hover { background: var(--brand-dark); color: #fff; }

/* Sections */
.section { padding: 68px 0; }
.soft { background: var(--bg-soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
h2 { margin: 0 0 16px; font-size: 28px; line-height: 1.3; letter-spacing: -0.01em; }
h3 { line-height: 1.35; }
.lead { margin-top: 0; max-width: 44em; color: var(--muted); }
.two-col { display: grid; grid-template-columns: 1.35fr 1fr; gap: 48px; align-items: start; }
.list-title { margin: 6px 0 8px; font-size: 18px; }
.checklist { list-style: none; margin: 0; padding: 0; }
.checklist li { position: relative; padding: 11px 0 11px 30px; border-bottom: 1px solid var(--line); }
.checklist li:last-child { border-bottom: 0; }
.checklist li::before {
  content: ""; position: absolute; left: 4px; top: 19px;
  width: 12px; height: 7px;
  border-left: 2px solid var(--brand); border-bottom: 2px solid var(--brand);
  transform: rotate(-45deg);
}

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; margin-top: 28px; }
.card { padding: 26px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); }
.card h3 { margin: 14px 0 8px; font-size: 19px; }
.card p { margin: 0; font-size: 16px; color: var(--muted); }
.icon { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 10px; background: #e3eff1; color: var(--brand); }
.icon svg { width: 22px; height: 22px; }

.contact-card { padding: 28px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 1px 2px rgba(19, 40, 59, 0.04); }
.contact-card .org { margin: 0 0 6px; font-size: 20px; font-weight: 700; }
address { margin: 0 0 16px; font-style: normal; font-size: 18px; line-height: 1.6; }

/* 404 */
.narrow { max-width: 640px; }
.notfound h1 { margin: 0 0 12px; font-size: 34px; }

/* Footer */
.site-footer { padding: 36px 0; background: #0f2433; color: #c7d3dc; font-size: 14.5px; }
.site-footer p { margin: 0 0 8px; }
.site-footer .fine { margin: 0; color: #93a6b4; }

@media (max-width: 760px) {
  .two-col { grid-template-columns: 1fr; gap: 24px; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .nav a:not(.lang) { display: none; }
  .hero { padding: 52px 0 48px; }
  .hero p.sub { font-size: 17px; }
  .section { padding: 52px 0; }
  h2 { font-size: 24px; }
}