:root{
  --bg:#FFFFFF;
  --ink:#0A0A0A;
  --mute:#4A4A4A;
  --lime:#B9FF66;
  --soft:#F3F3F3;
  --max:1140px;
  --r:28px;
  --bd:3px solid var(--ink);
  --sh:4px 4px 0 var(--ink);
  --font:-apple-system,"PingFang SC","Noto Sans SC","Segoe UI",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:110px}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.65 var(--font);-webkit-font-smoothing:antialiased}
a{color:var(--ink)}
a:hover{opacity:.75}
.wrap{max-width:var(--max);margin:0 auto;padding:0 28px}
.nav{border-bottom:var(--bd);background:#fff;position:sticky;top:0;z-index:20}
.nav-inner{max-width:var(--max);margin:0 auto;padding:16px 28px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:800;font-size:20px;letter-spacing:-.02em}
.brand img{width:34px;height:34px}
.nav-links{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.nav-links a{text-decoration:none;font-size:15px;font-weight:600;padding:8px 12px;border-radius:10px}
.nav-links a:hover{background:var(--soft);opacity:1}
.lang{font:700 13px var(--font);padding:9px 24px 9px 10px;border:2px solid var(--ink);border-radius:10px;background:#fff;color:var(--ink);min-height:44px;cursor:pointer;max-width:150px}
.lang:disabled{cursor:wait;opacity:.6}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:14px 22px;border-radius:12px;border:var(--bd);font-weight:700;font-size:15px;
  text-decoration:none;box-shadow:var(--sh);background:var(--ink);color:#fff;
}
.btn:hover{opacity:1;background:var(--lime);color:var(--ink)}
.btn-outline{background:#fff;color:var(--ink)}
.btn-outline:hover{background:var(--lime)}
.btn-sm{padding:10px 16px;font-size:14px;border-radius:10px}
/* hero */
.hero{padding:56px 0 40px;display:grid;grid-template-columns:1.05fr .95fr;gap:36px;align-items:center}
.hero h1{margin:0 0 16px;font-size:clamp(2.3rem,4.6vw,3.6rem);line-height:1.12;font-weight:800;letter-spacing:-.035em}
.hero .sub{margin:0 0 14px;font-size:1.15rem;font-weight:700}
.hero .lead{margin:0 0 28px;color:var(--mute);max-width:34em}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.cta-note{font-size:13px;color:var(--mute);font-weight:600}
.hero-art{position:relative}
.hero-art img{width:100%;height:auto;display:block}
/* trust */
.trust{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;padding:12px 0 56px}
.trust article{
  border:var(--bd);border-radius:var(--r);padding:22px 18px;box-shadow:var(--sh);background:#fff;
}
.trust article:nth-child(odd){background:var(--lime)}
.trust h3{margin:0 0 8px;font-size:18px;font-weight:800}
.trust p{margin:0;font-size:14px;color:var(--mute);font-weight:500;line-height:1.5}
/* sections */
.sec{padding:0 0 64px}
.tag{
  display:inline-block;background:var(--lime);border:2px solid var(--ink);
  border-radius:8px;padding:4px 10px;font-weight:800;font-size:18px;margin-bottom:18px;
}
.sec h2{margin:0 0 10px;font-size:clamp(1.6rem,2.8vw,2.1rem);font-weight:800;letter-spacing:-.02em}
.sec-lead{margin:0 0 24px;color:var(--mute);max-width:42em}
.hl{background:var(--lime);padding:0 .15em;border-radius:4px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.card{
  border:var(--bd);border-radius:var(--r);padding:28px;box-shadow:var(--sh);background:#fff;
}
.card.dark{background:var(--ink);color:#fff;box-shadow:4px 4px 0 var(--lime)}
.card.dark p,.card.dark .sec-lead{color:rgba(255,255,255,.78)}
.card h3{margin:0 0 10px;font-size:22px;font-weight:800}
.card p{margin:0;color:var(--mute);font-size:15px}
.list{list-style:none;margin:0;padding:0}
.list li{padding:12px 0;border-top:2px solid var(--ink);font-size:15px;color:var(--mute)}
.list li:first-child{border-top:0}
.list strong{color:var(--ink);font-weight:800}
.card.dark .list li{border-top-color:rgba(255,255,255,.25);color:rgba(255,255,255,.8)}
.card.dark .list strong{color:#fff}
.meta{margin-top:16px;font-size:14px;font-weight:600}
.meta a{font-weight:700}
.chip{
  display:inline-block;background:var(--lime);border:2px solid var(--ink);border-radius:6px;
  font-size:12px;font-weight:800;padding:1px 8px;margin-left:6px;vertical-align:middle;color:var(--ink);
}
.steps{list-style:none;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:8px 0 18px}
.step{border:var(--bd);border-radius:20px;padding:18px;background:#fff;box-shadow:var(--sh)}
.step .n{font-size:12px;font-weight:800;letter-spacing:.06em;margin-bottom:6px}
.step h3{margin:0 0 6px;font-size:16px;font-weight:800}
.step p{margin:0;font-size:13px;color:var(--mute);line-height:1.5}
.callout{
  border:var(--bd);border-radius:18px;padding:16px 18px;background:var(--soft);font-size:14px;font-weight:600;
}
.callout strong{font-weight:800}
.status{
  display:inline-block;margin-top:12px;background:var(--lime);border:2px solid var(--ink);
  border-radius:8px;padding:4px 10px;font-size:12px;font-weight:800;
}
.band{
  border:var(--bd);border-radius:var(--r);padding:32px;background:var(--soft);
  display:flex;flex-wrap:wrap;gap:20px;align-items:center;justify-content:space-between;
  box-shadow:var(--sh);margin-bottom:48px;
}
.band h2{margin:0 0 6px;font-size:1.5rem;font-weight:800}
.band p{margin:0;color:var(--mute);font-size:15px}
footer{border-top:var(--bd);padding:28px 0 48px;font-size:13px;font-weight:600;color:var(--mute)}
.foot{display:flex;flex-wrap:wrap;gap:16px 28px;justify-content:space-between;align-items:flex-start}
.foot-links{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.foot a{font-weight:700}
@media (max-width:900px){
  .hero,.trust,.grid2,.steps{grid-template-columns:1fr}
  .trust{grid-template-columns:1fr 1fr}
  .nav-links a.hide{display:none}
  .hero{padding-top:36px}
}
@media (max-width:520px){.trust{grid-template-columns:1fr}.wrap,.nav-inner{padding-left:18px;padding-right:18px}}
[hidden]{display:none!important}
:focus-visible{outline:3px solid var(--ink);outline-offset:5px}
.btn:focus-visible{outline-offset:8px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
.skip{position:fixed;top:8px;left:8px;transform:translateY(-180%);z-index:30;background:var(--lime);border:var(--bd);border-radius:8px;padding:8px 12px;font-weight:700}
.skip:focus{transform:translateY(0)}
.hero>*{min-width:0}
.hero-art img{max-width:100%}
.hero h1{text-wrap:balance;overflow-wrap:anywhere}
.hero .sub{text-wrap:pretty}
.trust article,.card,.step,.band>*{min-width:0;overflow-wrap:anywhere}
.trust h2{margin:0 0 8px;font-size:18px;font-weight:800}
.card .meta{margin-top:16px}
.card .meta a{display:inline-block}
.notice{margin:12px 0 0;color:var(--mute);font-size:14px;font-weight:600}
.language-control{display:flex;align-items:center}
.nav-links .btn{background:#fff;color:var(--ink);border:var(--bd);font-size:14px}
.nav-links .btn:hover{background:var(--lime)}
.foot .brand{margin-bottom:8px;color:var(--ink)}
.foot-links{gap:8px 14px}
@media (max-width:600px){
  .nav-inner{gap:10px;padding-top:12px;padding-bottom:12px}
  .brand{font-size:18px;gap:7px}
  .brand img{width:30px;height:30px}
  .nav-links{gap:8px}
  .nav-links .btn{display:none}
  .lang{max-width:132px}
  .hero{gap:24px;padding-top:32px}
  .hero h1{font-size:clamp(2.1rem,8vw,2.8rem)}
  .card,.band{padding:22px}
  .sec{padding-bottom:48px}
  .cta-row .btn{max-width:100%;white-space:normal;text-align:center}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}