:root{
  --bg:#f7fbff; --card:#ffffff; --ink:#1f2a44; --muted:#6e7f99;
  --line:#dfeaf4; --brand:#4f8df7; --brand2:#71c7e7; --soft:#eaf4ff;
  --footer:#dceff8; --radius:22px; --shadow:0 10px 35px rgba(45,87,130,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans",
  "Helvetica Neue",Arial,sans-serif; color:var(--ink);
  background:linear-gradient(180deg,#f9fcff 0%,#f3f9fd 100%);
}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.site-header{
  position:sticky; top:0; z-index:20; backdrop-filter:blur(16px);
  background:rgba(255,255,255,.82); border-bottom:1px solid rgba(210,226,239,.8)
}
.header-inner,.container{max-width:1040px;margin:auto;padding:0 24px}
.header-inner{
  min-height:72px; display:flex; align-items:center; justify-content:space-between; gap:20px
}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;letter-spacing:.2px}
.brand-mark{
  width:54px;height:54px;border-radius:16px;display:block;object-fit:cover;
  box-shadow:0 8px 20px rgba(79,141,247,.22)
}
.brand small{display:block;color:var(--muted);font-weight:600;font-size:12px;margin-top:2px}
.header-actions{display:flex;align-items:center;gap:12px}
.lang-select{
  border:1px solid var(--line); background:#fff; color:var(--ink);
  border-radius:12px; padding:10px 12px; font-size:14px
}
.hero{padding:72px 0 34px}
.hero h1{font-size:44px;line-height:1.08;margin:0 0 14px;letter-spacing:-1px}
.hero p{font-size:18px;color:var(--muted);max-width:760px;line-height:1.75;margin:0}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:34px;margin:18px 0
}
.card h2{font-size:24px;margin:0 0 16px}
.card h3{font-size:18px;margin:26px 0 10px}
.card p,.card li{font-size:15.5px;line-height:1.8;color:#3f506b}
.card ul{padding-left:22px}
.notice{
  background:var(--soft);border:1px solid #d7e8fb;border-radius:16px;
  padding:16px 18px;color:#35577b;margin:18px 0
}
.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.mini{
  padding:22px;border:1px solid var(--line);border-radius:18px;background:#fff
}
.mini h3{margin:0 0 8px}
.contact-box{
  background:linear-gradient(135deg,#f0f7ff,#f6fbff);border:1px solid #d7e8fb;
  border-radius:18px;padding:22px
}
.code-like{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  background:#f5f8fb;border:1px solid var(--line);border-radius:10px;padding:2px 7px
}
.site-footer{
  margin-top:70px;background:var(--footer);border-top:1px solid #c9e1ec
}
.footer-inner{
  max-width:1200px;margin:auto;padding:34px 24px 30px;text-align:center;color:#6d7f98
}
.footer-line{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;line-height:1.8;font-size:18px}
.footer-links{margin-top:14px;display:flex;justify-content:center;gap:22px;flex-wrap:wrap;font-size:18px}
.footer-links a{color:#5c7390}
.footer-links a + a::before{content:"|";margin-right:22px;color:#9cb0c5}
.badge{
  display:inline-block;background:#eef5ff;color:#3c6db5;border:1px solid #d7e8fb;
  border-radius:999px;padding:6px 10px;font-size:12px;font-weight:700;margin-bottom:12px
}
@media (max-width:720px){
  .header-inner{min-height:64px;padding:0 16px}
  .container{padding:0 16px}
  .hero{padding:48px 0 24px}
  .hero h1{font-size:34px}
  .hero p{font-size:16px}
  .grid{grid-template-columns:1fr}
  .card{padding:24px}
  .brand small{display:none}
}