:root{
  --ink:#0d1b2a; --muted:#5b6b7c; --line:#dfe6ee; --bg:#f6f9fb; --card:#fff;
  --accent:#177f93; --accent-dark:#0f5f6f; --accent-soft:#e6f3f6; --warn:#b45309;
  --max:1140px; --radius:10px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.65;font-size:16.5px}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent-dark);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{line-height:1.25;margin:0 0 .5em;font-weight:650;letter-spacing:-.01em}
h1{font-size:clamp(1.9rem,3.4vw,2.75rem)}
h2{font-size:clamp(1.35rem,2.2vw,1.75rem);margin-top:2.2em}
h3{font-size:1.12rem}
p{margin:0 0 1em}
ul,ol{margin:0 0 1.2em;padding-left:1.25em}
li{margin:.35em 0}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-9999px}
.skip:focus{left:12px;top:12px;background:#fff;padding:10px 14px;border-radius:8px;z-index:99}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.hd{display:flex;align-items:center;gap:18px;height:64px}
.logo{display:flex;align-items:baseline;gap:9px;font-weight:750;color:var(--ink);letter-spacing:.02em}
.logo b{font-size:1.18rem}
.logo span{font-size:.72rem;color:var(--muted);font-weight:500;letter-spacing:.06em;text-transform:uppercase}
.nav{margin-left:auto;display:flex;gap:4px;align-items:center}
.nav a{padding:8px 11px;border-radius:7px;color:#243447;font-size:.94rem}
.nav a:hover{background:var(--accent-soft);text-decoration:none}
.nav a[aria-current]{background:var(--accent-soft);color:var(--accent-dark);font-weight:600}
.nav .lang{border:1px solid var(--line);font-size:.82rem;padding:6px 9px;color:var(--muted)}
.burger{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:7px;font-size:1.2rem;padding:4px 10px;cursor:pointer}

/* hero */
.hero{background:linear-gradient(160deg,#0d2b38 0%,#12394a 45%,#177f93 100%);color:#eaf4f7;padding:64px 0 56px;position:relative;overflow:hidden}
.hero:after{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.10) 1px,transparent 1px);background-size:22px 22px;opacity:.5;pointer-events:none}
.hero .wrap{position:relative;z-index:1}
.kicker{display:inline-block;font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;color:#9fd7e2;border:1px solid rgba(159,215,226,.45);border-radius:99px;padding:4px 11px;margin-bottom:16px}
.hero h1{color:#fff;max-width:24ch}
.hero .lead{font-size:1.12rem;color:#cfe6ec;max-width:62ch;margin-bottom:26px}
.cta-row{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 20px;border-radius:8px;font-weight:600;font-size:.95rem;border:1px solid transparent}
.btn-primary{background:#fff;color:#0f5f6f}
.btn-primary:hover{background:#eaf4f7;text-decoration:none}
.btn-ghost{color:#eaf4f7;border-color:rgba(234,244,247,.5)}
.btn-ghost:hover{background:rgba(255,255,255,.12);text-decoration:none}
.hero-points{display:flex;gap:26px;flex-wrap:wrap;margin-top:34px;font-size:.9rem;color:#a9cfd9}
.hero-points span:before{content:"→ ";color:#6fbecd}

/* trust strip */
.strip{background:#fff;border-bottom:1px solid var(--line)}
.strip .wrap{display:flex;gap:34px;flex-wrap:wrap;padding:16px 20px;font-size:.86rem;color:var(--muted)}
.strip b{color:var(--ink)}

/* sections */
section{padding:54px 0}
section.tight{padding:34px 0}
.sec-head{max-width:70ch;margin-bottom:26px}
.sec-head p{color:var(--muted);margin:0}
.grid{display:grid;gap:18px}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.card h3{margin-bottom:.35em}
.card p{color:var(--muted);font-size:.95rem;margin:0}
.card .tag{display:inline-block;font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;color:var(--accent-dark);background:var(--accent-soft);border-radius:5px;padding:2px 7px;margin-bottom:10px}
.pcard{display:flex;flex-direction:column}
.pcard ul{font-size:.92rem;color:var(--muted);margin:10px 0 0}
.pcard .tag{align-self:flex-start}
.pcard .more{margin-top:auto;padding-top:14px;font-weight:600;font-size:.92rem}

/* prose */
.prose{max-width:74ch}
.wrap.prose{max-width:none}
.wrap.prose>*{max-width:74ch}
.prose h2:first-child{margin-top:0}
.prose h2{margin-top:1.9em}
.prose code{font-family:var(--mono);font-size:.88em;background:#eef3f7;padding:1px 5px;border-radius:4px}
.note{background:var(--accent-soft);border-left:3px solid var(--accent);padding:12px 16px;border-radius:0 8px 8px 0;font-size:.93rem;color:#17414b;margin:18px 0}

/* tables */
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
table{border-collapse:collapse;width:100%;font-size:.93rem}
th,td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--line);vertical-align:top}
th{background:#f0f5f8;font-weight:600;font-size:.86rem;letter-spacing:.03em;text-transform:uppercase;color:#40566b}
tr:last-child td{border-bottom:0}
td:first-child{width:46%}
.tbl-note{font-size:.82rem;color:var(--muted);margin-top:8px}

/* glance */
.glance{display:grid;grid-template-columns:180px 1fr;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin:26px 0}
.glance div{background:#fff;padding:12px 15px;font-size:.93rem}
.glance div:nth-child(odd){background:#f7fafc;font-weight:600;color:#3c5266}

/* faq */
details{background:#fff;border:1px solid var(--line);border-radius:9px;padding:14px 16px;margin-bottom:10px}
summary{cursor:pointer;font-weight:600;font-size:.98rem}
details[open] summary{margin-bottom:10px}
details p:last-child{margin-bottom:0}

/* cta band */
.band{background:#0f2f3c;color:#dceef3;padding:46px 0}
.band h2{color:#fff;margin-top:0}
.band p{color:#a9cfd9;max-width:64ch}
.band .btn-primary{background:var(--accent);color:#fff;border-color:var(--accent)}
.band .btn-primary:hover{background:#1a90a6}

/* breadcrumb */
.crumb{font-size:.85rem;color:var(--muted);padding:18px 0 0}
.crumb a{color:var(--muted)}

/* form */
form.inq{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;max-width:640px}
.field{margin-bottom:14px}
label{display:block;font-size:.88rem;font-weight:600;margin-bottom:5px}
input,select,textarea{width:100%;padding:10px 12px;border:1px solid #c9d5e0;border-radius:7px;font:inherit;font-size:.95rem;background:#fff;color:var(--ink)}
input:focus,select:focus,textarea:focus{outline:2px solid #9fd7e2;outline-offset:1px;border-color:var(--accent)}
textarea{min-height:120px;resize:vertical}
.hp{position:absolute;left:-9999px}
.hint{font-size:.82rem;color:var(--muted)}
.err{background:#fdecec;border-left:3px solid #c0392b;color:#7b2318;padding:10px 14px;border-radius:0 8px 8px 0;font-size:.9rem;margin-bottom:16px}

/* footer */
.site-footer{background:#0b1f28;color:#9db6c2;font-size:.9rem;padding:44px 0 26px;margin-top:0}
.site-footer a{color:#cfe6ec}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:28px}
.site-footer h4{color:#fff;font-size:.82rem;letter-spacing:.1em;text-transform:uppercase;margin-bottom:.9em}
.site-footer p{margin:.25em 0}
.foot-bottom{border-top:1px solid #1b3641;margin-top:30px;padding-top:16px;font-size:.8rem;color:#6f8b98}

/* articles */
.meta{font-size:.85rem;color:var(--muted);margin:-6px 0 20px}
pre{background:#0f2530;color:#dbe9ef;padding:14px 16px;border-radius:9px;overflow-x:auto;font-size:.84rem;line-height:1.55;margin:0 0 1.2em}
.prose pre code,pre code{background:none;padding:0;color:inherit;font-size:inherit}
.prose pre{background:#0f2530;color:#e6f0f4}
.wrap.prose>pre{max-width:none;width:100%}
.prose h3{margin-top:1.5em}
.tagrow{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 26px}
.tagrow a{font-size:.78rem;letter-spacing:.04em;text-transform:uppercase;background:#eef4f7;color:#3c5266;border:1px solid var(--line);border-radius:99px;padding:4px 10px}
.tagrow a:hover{background:var(--accent-soft);text-decoration:none}
.artcard h3{font-size:1.05rem;margin-bottom:.3em}
.artcard .meta{margin:0 0 10px}
.artcard p{font-size:.94rem;color:var(--muted);margin:0}
.toc{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px 20px;margin:0 0 28px;font-size:.92rem}
.toc b{display:block;margin-bottom:6px;font-size:.8rem;letter-spacing:.08em;text-transform:uppercase;color:#40566b}
.toc ol{margin:0;padding-left:1.2em;color:var(--muted)}
.nextread{display:grid;gap:14px;grid-template-columns:repeat(2,minmax(0,1fr));margin-top:14px}
@media (max-width:860px){
  .g3,.g2{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .glance{grid-template-columns:1fr}
  .glance div:nth-child(odd){padding-bottom:2px}
  .nav{display:none}
  .nav.open{display:flex;position:absolute;top:64px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:10px 20px 16px;border-bottom:1px solid var(--line);gap:2px}
  .burger{display:block}
  .nav .lang{margin-top:6px;text-align:center}
  .hero{padding:44px 0 40px}
  section{padding:38px 0}
  td:first-child{width:auto}
}