:root {
  --bg: #031428;
  --bg-soft: #071e36;
  --surface: rgba(9, 34, 58, .78);
  --surface-solid: #0b2946;
  --surface-light: #f6fafc;
  --text: #ecf7ff;
  --muted: #b5c9d8;
  --ink: #102337;
  --ink-muted: #516579;
  --teal: #11e1c2;
  --cyan: #20c9f5;
  --blue: #1884ff;
  --line: rgba(179, 219, 240, .16);
  --line-light: #dfeaf0;
  --danger: #ffcf7a;
  --max: 1160px;
  --radius: 24px;
  --shadow: 0 24px 70px rgba(0, 8, 20, .32);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 18% 0%, rgba(17,225,194,.12), transparent 34rem),
    radial-gradient(circle at 88% 12%, rgba(24,132,255,.16), transparent 30rem),
    var(--bg);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
button, input, textarea { font: inherit; }
.skip-link {
  position: fixed; left: 1rem; top: -5rem; z-index: 9999;
  padding: .75rem 1rem; background: white; color: #04182d; border-radius: .6rem;
}
.skip-link:focus { top: 1rem; }
.container { width: min(var(--max), calc(100% - 2rem)); margin-inline: auto; }
.narrow { width: min(820px, calc(100% - 2rem)); margin-inline: auto; }

.site-header {
  position: sticky; top: 0; z-index: 1000;
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(16px);
  background: rgba(3,20,40,.76);
  transition: border-color .2s ease, background .2s ease;
}
.site-header.scrolled { border-color: var(--line); background: rgba(3,20,40,.94); }
.nav-wrap { min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; }
.brand { display: inline-flex; align-items: center; gap: .75rem; text-decoration: none; font-weight: 800; letter-spacing: -.02em; }
.brand img { width: 44px; height: 44px; border-radius: 12px; box-shadow: 0 8px 26px rgba(17,225,194,.18); }
.brand span { font-size: 1.07rem; }
.nav-links { display: flex; align-items: center; gap: .25rem; }
.nav-links a { color: var(--muted); text-decoration: none; padding: .62rem .82rem; border-radius: 999px; font-size: .94rem; font-weight: 650; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: white; background: rgba(255,255,255,.08); }
.nav-toggle { display: none; width: 44px; height: 44px; padding: 0; border: 1px solid var(--line); color: white; background: rgba(255,255,255,.05); border-radius: 12px; }
.nav-toggle svg { width: 22px; margin: auto; }

.hero { padding: clamp(4.2rem, 9vw, 7.5rem) 0 4.8rem; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.08fr .92fr; gap: clamp(2rem, 6vw, 5.5rem); align-items: center; }
.eyebrow { display: inline-flex; align-items: center; gap: .55rem; margin-bottom: 1rem; color: #9eefff; font-weight: 750; font-size: .83rem; letter-spacing: .08em; text-transform: uppercase; }
.eyebrow::before { content: ""; width: 24px; height: 2px; background: linear-gradient(90deg,var(--teal),var(--cyan)); }
h1,h2,h3 { margin: 0; line-height: 1.12; letter-spacing: -.035em; }
h1 { font-size: clamp(3rem, 7vw, 5.6rem); max-width: 780px; }
.gradient-text { color: transparent; background: linear-gradient(90deg,#fff 8%,var(--teal) 52%,#54a5ff); background-clip: text; -webkit-background-clip: text; }
.hero-copy > p { margin: 1.35rem 0 0; max-width: 680px; color: var(--muted); font-size: clamp(1.04rem, 2vw, 1.22rem); }
.actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 2rem; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: .55rem; min-height: 48px; padding: .76rem 1.1rem; border-radius: 13px; text-decoration: none; font-weight: 800; border: 1px solid transparent; transition: transform .18s ease, box-shadow .18s ease, background .18s ease; }
.btn:hover { transform: translateY(-2px); }
.btn-primary { color: #032036; background: linear-gradient(110deg,var(--teal),#5fe8ff); box-shadow: 0 12px 34px rgba(17,225,194,.22); }
.btn-secondary { color: white; border-color: var(--line); background: rgba(255,255,255,.055); }
.btn-small { min-height: 42px; padding: .62rem .9rem; font-size: .9rem; }
.hero-badges { display: flex; flex-wrap: wrap; gap: .65rem; margin-top: 1.7rem; }
.chip { display: inline-flex; align-items: center; gap: .45rem; padding: .5rem .72rem; border: 1px solid var(--line); background: rgba(255,255,255,.04); border-radius: 999px; color: #d5e7f2; font-size: .85rem; }
.chip svg { width: 16px; color: var(--teal); }
.visual-card { position: relative; padding: 1.15rem; border: 1px solid rgba(115,221,255,.22); background: linear-gradient(150deg,rgba(9,45,74,.88),rgba(5,23,46,.82)); border-radius: 36px; box-shadow: var(--shadow); }
.visual-card::before { content: ""; position: absolute; inset: -1px; z-index: -1; border-radius: inherit; background: linear-gradient(135deg,rgba(17,225,194,.5),transparent 38%,rgba(24,132,255,.5)); filter: blur(12px); opacity: .7; }
.visual-card img { border-radius: 28px; }
.status-strip { position: absolute; left: -1rem; right: 1.1rem; bottom: -1rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: .9rem 1rem; border: 1px solid var(--line); border-radius: 16px; background: rgba(3,20,40,.92); backdrop-filter: blur(12px); box-shadow: 0 16px 40px rgba(0,0,0,.25); }
.status-strip strong { display: block; font-size: .92rem; }
.status-strip span { color: var(--muted); font-size: .79rem; }
.status-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--teal); box-shadow: 0 0 0 5px rgba(17,225,194,.12); }

.section { padding: clamp(4rem, 8vw, 7rem) 0; }
.section-alt { border-block: 1px solid var(--line); background: rgba(6,27,49,.72); }
.section-light { color: var(--ink); background: var(--surface-light); }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 2rem; margin-bottom: 2.2rem; }
.section-head h2, .page-hero h1 { font-size: clamp(2.15rem, 5vw, 3.55rem); }
.section-head p { max-width: 600px; margin: 0; color: var(--muted); }
.section-light .section-head p { color: var(--ink-muted); }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 1rem; }
.card { padding: 1.5rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.section-light .card { background: white; border-color: var(--line-light); box-shadow: 0 12px 32px rgba(17,43,67,.06); }
.icon-box { width: 46px; height: 46px; display: grid; place-items: center; margin-bottom: 1rem; color: #06253b; background: linear-gradient(135deg,var(--teal),#64ddff); border-radius: 13px; }
.icon-box svg { width: 23px; }
.card h3 { font-size: 1.18rem; }
.card p { margin: .72rem 0 0; color: var(--muted); }
.section-light .card p { color: var(--ink-muted); }

.steps { display: grid; grid-template-columns: repeat(4,1fr); gap: 1rem; counter-reset: step; }
.step { position: relative; padding: 1.5rem; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(255,255,255,.035); counter-increment: step; }
.step::before { content: "0" counter(step); display: inline-block; margin-bottom: 2.2rem; color: var(--teal); font-size: .82rem; font-weight: 900; letter-spacing: .12em; }
.step h3 { font-size: 1.08rem; }
.step p { color: var(--muted); margin: .65rem 0 0; font-size: .94rem; }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem,5vw,5rem); align-items: center; }
.list-check { list-style: none; padding: 0; margin: 1.4rem 0 0; display: grid; gap: .9rem; }
.list-check li { display: flex; gap: .75rem; align-items: flex-start; color: var(--muted); }
.list-check svg { flex: 0 0 20px; width: 20px; color: var(--teal); margin-top: .18rem; }
.info-panel { padding: clamp(1.4rem,4vw,2.2rem); border: 1px solid var(--line); border-radius: 28px; background: linear-gradient(145deg,rgba(11,43,73,.9),rgba(4,22,44,.9)); }
.info-row { display: flex; justify-content: space-between; gap: 1rem; padding: .95rem 0; border-bottom: 1px solid var(--line); }
.info-row:last-child { border-bottom: 0; }
.info-row span { color: var(--muted); }
.info-row strong { text-align: right; }
.warning { margin-top: 1.3rem; padding: 1rem; color: #ffe5b4; border: 1px solid rgba(255,207,122,.28); background: rgba(255,207,122,.075); border-radius: 14px; font-size: .9rem; }

.faq { display: grid; gap: .75rem; }
details { border: 1px solid var(--line); border-radius: 16px; background: rgba(255,255,255,.035); }
summary { cursor: pointer; list-style: none; padding: 1rem 1.15rem; font-weight: 800; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; float: right; color: var(--teal); font-size: 1.25rem; }
details[open] summary::after { content: "–"; }
details p { margin: 0; padding: 0 1.15rem 1.15rem; color: var(--muted); }

.cta { padding: 2rem; display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; border: 1px solid rgba(17,225,194,.25); border-radius: 28px; background: linear-gradient(110deg,rgba(17,225,194,.12),rgba(24,132,255,.12)); }
.cta h2 { font-size: clamp(1.8rem,4vw,2.6rem); }
.cta p { margin: .65rem 0 0; color: var(--muted); }

.page-hero { padding: clamp(3.5rem,8vw,6.5rem) 0 2.8rem; }
.page-hero p { max-width: 740px; margin: 1.15rem 0 0; color: var(--muted); font-size: 1.08rem; }
.page-meta { display: flex; flex-wrap: wrap; gap: .6rem; margin-top: 1.4rem; }

.article-wrap { padding: 1rem 0 6rem; }
.article { padding: clamp(1.5rem,5vw,3.4rem); color: var(--ink); background: white; border: 1px solid var(--line-light); border-radius: 28px; box-shadow: 0 26px 80px rgba(0,7,20,.24); }
.article h2 { margin: 2.4rem 0 .8rem; font-size: clamp(1.35rem,3vw,1.85rem); letter-spacing: -.02em; }
.article h2:first-child { margin-top: 0; }
.article h3 { margin: 1.5rem 0 .55rem; font-size: 1.15rem; }
.article p, .article li { color: #3e5368; }
.article ul, .article ol { padding-left: 1.4rem; }
.article a { color: #087e87; font-weight: 700; }
.article-note { padding: 1rem 1.1rem; margin: 1.25rem 0; border-left: 4px solid #09a997; background: #eefaf8; border-radius: 10px; color: #244a50; }
.article-warning { border-left-color: #c77700; background: #fff7e8; color: #61410f; }
.toc { padding: 1rem 1.2rem; margin-bottom: 1.8rem; background: #f5f9fb; border: 1px solid #e1ebf0; border-radius: 16px; }
.toc strong { display: block; margin-bottom: .45rem; }
.toc ol { margin: 0; columns: 2; }
.data-table { width: 100%; border-collapse: collapse; margin: 1rem 0 1.4rem; font-size: .94rem; }
.data-table th, .data-table td { padding: .8rem; text-align: left; vertical-align: top; border: 1px solid #dfe9ef; }
.data-table th { background: #f2f7fa; color: #17324a; }

.support-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 1rem; }
.support-card { padding: 1.5rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.support-card h2 { font-size: 1.35rem; }
.support-card p { color: var(--muted); }
.support-list { list-style: none; padding: 0; margin: 1rem 0 0; display: grid; gap: .65rem; }
.support-list a { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: .85rem .95rem; text-decoration: none; color: white; border: 1px solid var(--line); border-radius: 12px; background: rgba(255,255,255,.035); }
.support-list a:hover { border-color: rgba(17,225,194,.38); }

.site-footer { padding: 3.2rem 0 1.5rem; border-top: 1px solid var(--line); background: #02101f; }
.footer-grid { display: grid; grid-template-columns: 1.5fr repeat(3,1fr); gap: 2rem; }
.footer-brand p { max-width: 360px; color: var(--muted); }
.footer-col h3 { font-size: .96rem; margin-bottom: .85rem; }
.footer-col a { display: block; width: fit-content; margin: .45rem 0; color: var(--muted); text-decoration: none; font-size: .92rem; }
.footer-col a:hover { color: white; }
.footer-bottom { display: flex; justify-content: space-between; gap: 1rem; padding-top: 1.4rem; margin-top: 2rem; color: #829caf; border-top: 1px solid var(--line); font-size: .84rem; }

@media (max-width: 900px) {
  .hero-grid, .split, .support-grid { grid-template-columns: 1fr; }
  .hero-copy { order: 1; }
  .visual-card { width: min(560px,100%); margin-inline: auto; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
  .footer-col:last-child { grid-column: 2; }
}
@media (max-width: 720px) {
  .nav-toggle { display: grid; place-items: center; }
  .nav-links { position: absolute; top: 66px; left: 1rem; right: 1rem; display: none; padding: .65rem; border: 1px solid var(--line); border-radius: 16px; background: rgba(3,20,40,.98); box-shadow: var(--shadow); }
  .nav-links.open { display: grid; }
  .nav-links a { border-radius: 10px; }
  h1 { font-size: clamp(2.7rem,14vw,4rem); }
  .section-head, .cta { align-items: flex-start; flex-direction: column; }
  .grid-3, .steps { grid-template-columns: 1fr; }
  .status-strip { position: relative; left: auto; right: auto; bottom: auto; margin-top: .9rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-col:last-child { grid-column: auto; }
  .footer-bottom { flex-direction: column; }
  .toc ol { columns: 1; }
  .data-table { display: block; overflow-x: auto; }
}
@media (max-width: 480px) {
  .container, .narrow { width: min(100% - 1.2rem, var(--max)); }
  .brand span { font-size: 1rem; }
  .hero { padding-top: 3.4rem; }
  .actions .btn { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}