/* ── Reset ─────────────────────────────────────── */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}

/* ── Tokens ─────────────────────────────────────── */
:root{
  --bg:#fff;--bg2:#f7f8f9;--bg3:#ecfeff;
  --border:rgba(0,0,0,0.07);--border2:rgba(0,0,0,0.11);
  --text:#0f0e1a;--muted:#7878a0;--muted2:#b4b4cc;
  --accent:#06b6d4;--accent2:#67e8f9;
  --max-w:740px;--nav-h:56px;
}

/* ── Base ───────────────────────────────────────── */
body{
  font-family:'DM Sans',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  background:var(--bg);color:var(--text);
  font-size:16px;line-height:1.75;
  -webkit-font-smoothing:antialiased;
  display:flex;flex-direction:column;min-height:100vh;
}
main{flex:1}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}

/* ── NAV ────────────────────────────────────────── */
.nav{
  position:sticky;top:0;z-index:100;
  height:var(--nav-h);
  background:rgba(255,255,255,0.92);
  backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  border-bottom:1px solid var(--border);
  display:flex;align-items:center;justify-content:space-between;
  padding:0 48px;
}
.nav-logo{
  font-family:'DM Sans',sans-serif;font-size:19px;font-weight:800;
  letter-spacing:-0.5px;display:flex;align-items:center;
  gap:0;text-decoration:none;line-height:1;
}
.nav-logo:hover{text-decoration:none}
.nav-logo-k  {color:var(--accent);display:inline-block}
.nav-logo-ybr{color:var(--text);display:inline-block}
.nav-links{display:flex;align-items:center;gap:20px}
.nav-link{
  font-size:13px;font-weight:500;color:var(--muted);
  text-decoration:none;white-space:nowrap;transition:color .15s;
}
.nav-link:hover{color:var(--text);text-decoration:none}
.nav-link.active{color:var(--accent);font-weight:600}
.nav-cta{
  font-size:13px;font-weight:700;color:#fff;
  background:var(--accent);padding:7px 16px;border-radius:8px;
  text-decoration:none;transition:opacity .15s;white-space:nowrap;
}
.nav-cta:hover{opacity:.85;text-decoration:none}

/* ── PAGE ───────────────────────────────────────── */
.page{max-width:var(--max-w);margin:0 auto;padding:52px 24px 96px;width:100%}

/* ── BREADCRUMB ─────────────────────────────────── */
.breadcrumb{
  display:flex;align-items:center;gap:6px;
  font-size:12px;color:var(--muted2);
  margin-bottom:32px;flex-wrap:wrap;
}
.breadcrumb a{color:var(--muted2);text-decoration:none}
.breadcrumb a:hover{color:var(--muted)}

/* ── PAGE HEADER ────────────────────────────────── */
.page-header{margin-bottom:44px;padding-bottom:32px;border-bottom:1px solid var(--border)}
.page-eyebrow{
  font-size:11px;font-weight:700;letter-spacing:1.2px;
  text-transform:uppercase;color:var(--accent);margin-bottom:10px;
}
.page-title{
  font-size:clamp(26px,5vw,36px);font-weight:800;
  letter-spacing:-1.2px;color:var(--text);
  line-height:1.1;margin-bottom:16px;
}
.page-meta{font-size:13px;color:var(--muted2);display:flex;flex-wrap:wrap;gap:4px 16px}

/* ── TOC ────────────────────────────────────────── */
.toc{
  background:var(--bg2);border:1px solid var(--border);
  border-radius:14px;padding:22px 26px;margin-bottom:48px;
}
.toc-title{
  font-size:11px;font-weight:700;letter-spacing:.8px;
  text-transform:uppercase;color:var(--muted);margin-bottom:14px;
}
.toc-list{list-style:none;display:flex;flex-direction:column;gap:5px}
.toc-list li a{
  font-size:13px;color:var(--muted);font-weight:500;
  text-decoration:none;display:flex;align-items:center;gap:10px;
  padding:3px 0;transition:color .15s;
}
.toc-list li a:hover{color:var(--accent);text-decoration:none}
.toc-list li a.toc-active{color:var(--accent);font-weight:600}
.toc-num{font-size:10px;font-weight:700;color:var(--accent2);min-width:24px;flex-shrink:0}

/* ── ARTICLE ────────────────────────────────────── */
.article section{padding-bottom:40px;margin-bottom:40px;border-bottom:1px solid var(--border)}
.article section:last-child{border-bottom:none;padding-bottom:0;margin-bottom:0}
.article h2{
  font-size:19px;font-weight:800;letter-spacing:-0.4px;color:var(--text);
  margin-bottom:16px;padding-top:4px;
  display:flex;align-items:baseline;flex-wrap:wrap;gap:10px;line-height:1.3;
}
.art-num{
  font-size:10px;font-weight:700;color:var(--accent);
  letter-spacing:.5px;text-transform:uppercase;flex-shrink:0;
}
.article h3{font-size:14px;font-weight:700;color:var(--text);margin:22px 0 10px;letter-spacing:-0.2px}
.article p{font-size:15px;color:var(--muted);line-height:1.75;margin-bottom:12px}
.article p:last-child{margin-bottom:0}
.article ul,.article ol{padding-left:20px;margin-bottom:12px}
.article li{font-size:15px;color:var(--muted);line-height:1.75;margin-bottom:4px}
.article strong{color:var(--text);font-weight:600}

/* ── SPECIAL BLOCKS ─────────────────────────────── */
.notice{
  background:rgba(6,182,212,.05);
  border:1px solid rgba(6,182,212,.15);
  border-left:3px solid var(--accent);
  border-radius:0 10px 10px 0;
  padding:14px 18px;margin-bottom:14px;
  font-size:14px;color:var(--muted);line-height:1.65;
}
.notice strong{color:var(--text)}

.contact-card{background:var(--bg2);border:1px solid var(--border);border-radius:12px;padding:20px 24px}
.contact-card p{font-size:15px;color:var(--muted);margin-bottom:6px}
.contact-card p:last-child{margin-bottom:0}

.legal-note{font-size:13px;color:var(--muted2);font-style:italic;margin-top:20px;line-height:1.65}

/* ── FOOTER ─────────────────────────────────────── */
.footer{
  border-top:1px solid var(--border);background:var(--bg2);
  padding:22px 48px;display:flex;flex-wrap:wrap;
  justify-content:space-between;align-items:center;
  gap:12px;font-size:12px;color:var(--muted2);
}
.footer-links{display:flex;flex-wrap:wrap;gap:16px;align-items:center}
.footer a{color:var(--muted2);text-decoration:none;transition:color .15s}
.footer a:hover{color:var(--text)}
.footer a.active{color:var(--accent);font-weight:600}

/* ── RESPONSIVE ─────────────────────────────────── */
@media(max-width:640px){
  .nav{padding:0 16px}
  .nav-links .nav-link:not(.nav-cta){display:none}
  .page{padding:40px 16px 72px}
  .toc{padding:16px 18px}
  .footer{flex-direction:column;align-items:flex-start;padding:20px 16px}
}