:root {
  color-scheme: dark;
  --bg: #0b0e13;
  --surface: #131923;
  --surface-strong: #171e29;
  --line: #273140;
  --line-soft: #1d2531;
  --text: #edf2f8;
  --secondary: #aeb8c7;
  --muted: #748094;
  --accent: #86acf0;
  --accent-strong: #a8c7ff;
  --success: #73c8a1;
  --warning: #d3b475;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 9px 14px;
  border-radius: 6px;
  background: var(--text);
  color: var(--bg);
  transform: translateY(-160%);
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  padding: 0 max(28px, calc((100vw - 1240px) / 2));
  border-bottom: 1px solid rgba(39, 49, 64, .8);
  background: rgba(11, 14, 19, .94);
  backdrop-filter: blur(18px);
}
.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--surface);
}
.brand-mark svg { width: 25px; fill: none; stroke: var(--accent); stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }
.brand > span:last-child { display: grid; gap: 1px; }
.brand strong { font-size: 18px; letter-spacing: .01em; }
.brand small { color: var(--muted); font-size: 9px; font-weight: 700; letter-spacing: .18em; }
.site-header nav { display: flex; align-items: center; gap: 28px; color: var(--secondary); font-size: 13px; }
.site-header nav a { transition: color .18s ease; }
.site-header nav a:hover { color: var(--text); }
.site-header nav a.active { color: var(--text); }
.site-header .admin-link { padding: 9px 14px; border: 1px solid var(--line); border-radius: 7px; color: var(--text); }

main, .site-footer { width: min(1240px, calc(100% - 56px)); margin-inline: auto; }
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(330px, .7fr);
  gap: 72px;
  align-items: center;
  min-height: 620px;
  padding: 78px 0 68px;
  border-bottom: 1px solid var(--line-soft);
}
.eyebrow { display: flex; align-items: center; gap: 9px; margin: 0 0 26px; color: var(--accent); font-size: 11px; font-weight: 700; letter-spacing: .16em; }
.eyebrow span { width: 7px; height: 7px; border-radius: 50%; background: var(--success); box-shadow: 0 0 0 5px rgba(115, 200, 161, .08); }
.hero h1 { max-width: 800px; margin: 0; font-size: clamp(46px, 5.1vw, 76px); line-height: 1.08; letter-spacing: -.052em; }
.hero-description { max-width: 690px; margin: 28px 0 0; color: var(--secondary); font-size: 17px; line-height: 1.85; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 36px; }
.button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 7px;
  font-size: 13px;
  font-weight: 700;
  transition: border-color .18s ease, background .18s ease, color .18s ease, transform .18s ease;
}
.button:hover { transform: translateY(-1px); border-color: #3a475a; }
.button.primary { border-color: var(--accent-strong); background: var(--accent-strong); color: #101721; }
.button.primary:hover { background: #b8d2ff; }
.button.secondary { background: var(--surface); color: var(--text); }
.button.disabled { pointer-events: none; opacity: .48; }
.service-state { display: flex; align-items: center; gap: 8px; margin: 24px 0 0; color: var(--muted); font-size: 12px; }
.service-state i { width: 7px; height: 7px; border-radius: 50%; background: var(--warning); }
.service-state.available i { background: var(--success); }
.service-state.unavailable i { background: #d88888; }

.delivery-summary { border: 1px solid var(--line); border-radius: 12px; background: var(--surface); overflow: hidden; }
.delivery-summary header { display: flex; justify-content: space-between; align-items: baseline; padding: 19px 21px; border-bottom: 1px solid var(--line); }
.delivery-summary header span { color: var(--muted); font-size: 11px; letter-spacing: .12em; }
.delivery-summary header b { color: var(--accent-strong); font-size: 13px; }
.delivery-summary dl { margin: 0; }
.delivery-summary dl div { display: grid; grid-template-columns: 1fr 1.2fr; gap: 20px; padding: 18px 21px; border-bottom: 1px solid var(--line-soft); }
.delivery-summary dt { color: var(--muted); font-size: 12px; }
.delivery-summary dd { margin: 0; color: var(--text); font-size: 13px; text-align: right; }
.delivery-summary > p { margin: 0; padding: 18px 21px 20px; color: var(--secondary); font-size: 12px; line-height: 1.7; }

.downloads, .install { padding: 82px 0; border-bottom: 1px solid var(--line-soft); }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 30px; }
.section-heading p { margin: 0 0 9px; color: var(--accent); font-size: 10px; font-weight: 700; letter-spacing: .18em; }
.section-heading h2 { margin: 0; font-size: clamp(26px, 3vw, 38px); letter-spacing: -.035em; }
.section-heading > span { color: var(--muted); font-size: 12px; }
.client-grid { display: grid; grid-template-columns: 1fr; }
.client-card { display: flex; min-height: 330px; flex-direction: column; padding: 30px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
.client-card.featured { background: var(--surface-strong); border-color: #354761; }
.client-card > header { display: flex; align-items: center; gap: 15px; }
.client-code { display: grid; flex: 0 0 46px; height: 46px; place-items: center; border: 1px solid var(--line); border-radius: 8px; color: var(--accent); background: #0f141c; font: 700 11px/1 Consolas, monospace; }
.client-card header p { margin: 0 0 5px; color: var(--muted); font-size: 11px; }
.client-card h3 { margin: 0; font-size: 21px; letter-spacing: -.02em; }
.client-body { display: grid; grid-template-columns: minmax(0, .9fr) minmax(360px, 1.1fr); gap: 44px; margin: 28px 0 24px; }
.client-description { margin: 0; color: var(--secondary); font-size: 14px; line-height: 1.8; }
.client-card ul { display: grid; gap: 12px; margin: 0; padding: 3px 0 3px 30px; border-left: 1px solid var(--line-soft); list-style: none; color: var(--secondary); font-size: 13px; }
.client-card li { position: relative; padding-left: 17px; }
.client-card li::before { position: absolute; top: .55em; left: 0; width: 5px; height: 5px; border-radius: 50%; background: var(--accent); content: ""; }
.client-card footer { display: flex; align-items: center; justify-content: space-between; gap: 18px; margin-top: auto; padding-top: 22px; border-top: 1px solid var(--line); }
.client-card footer > div { display: grid; gap: 4px; }
.release-version { font-size: 13px; font-weight: 700; }
.release-date { color: var(--muted); font-size: 10px; letter-spacing: .08em; }
.release-error { margin: 14px 0 0; color: #d89a9a; font-size: 11px; }

.install ol { display: grid; grid-template-columns: repeat(3, 1fr); margin: 0; padding: 0; border: 1px solid var(--line); border-radius: 12px; list-style: none; overflow: hidden; }
.install li { display: flex; min-height: 150px; gap: 18px; padding: 28px; background: var(--surface); }
.install li + li { border-left: 1px solid var(--line); }
.install li > b { color: var(--accent); font: 700 12px/1 Consolas, monospace; }
.install li div { display: grid; align-content: start; gap: 10px; }
.install li strong { font-size: 15px; }
.install li span { color: var(--secondary); font-size: 12px; line-height: 1.7; }

.site-footer { display: flex; align-items: center; justify-content: space-between; gap: 30px; min-height: 120px; color: var(--muted); font-size: 12px; }
.site-footer div { display: flex; align-items: baseline; gap: 12px; }
.site-footer strong { color: var(--text); font-size: 17px; }
.site-footer p { margin: 0; }
.site-footer p a{color:var(--secondary);transition:color .18s ease}.site-footer p a:hover{color:var(--text)}

.billing-public{padding-bottom:26px}
.billing-hero{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(330px,.75fr);gap:72px;align-items:end;padding:96px 0 74px;border-bottom:1px solid var(--line-soft)}
.billing-hero h1{max-width:820px;margin:0;font-size:clamp(44px,5vw,72px);line-height:1.08;letter-spacing:-.052em;text-wrap:balance}
.billing-hero>div>p:last-child{max-width:700px;margin:28px 0 0;color:var(--secondary);font-size:16px;line-height:1.85;text-wrap:pretty}
.billing-contract{border-top:2px solid var(--accent);background:var(--surface);padding:22px 24px 24px}
.billing-contract>span{color:var(--accent);font-size:10px;font-weight:700;letter-spacing:.14em}
.billing-contract dl{margin:17px 0 20px}
.billing-contract dl div{display:flex;justify-content:space-between;gap:20px;padding:12px 0;border-bottom:1px solid var(--line-soft)}
.billing-contract dt{color:var(--muted);font-size:12px}.billing-contract dd{margin:0;font-size:13px;font-weight:700;font-variant-numeric:tabular-nums}
.billing-contract small{display:block;color:var(--muted);font:10px/1.7 Consolas,"SFMono-Regular",monospace}
.billing-section{padding:78px 0;border-bottom:1px solid var(--line-soft)}
.billing-section-heading{display:flex;align-items:end;justify-content:space-between;gap:26px;margin-bottom:30px}
.billing-section-heading p,.version-policy p{margin:0 0 9px;color:var(--accent);font-size:10px;font-weight:700;letter-spacing:.18em}
.billing-section-heading h2,.version-policy h2{margin:0;font-size:clamp(27px,3vw,40px);letter-spacing:-.038em;text-wrap:balance}
.billing-section-heading>span{color:var(--muted);font-size:12px}
.price-feature,.compat-price{display:flex;align-items:center;justify-content:space-between;gap:36px;padding:27px 30px;background:var(--surface)}
.price-feature{border-left:2px solid var(--accent)}.compat-price{margin-top:14px;border-left:2px solid var(--muted)}
.price-feature span,.compat-price span{color:var(--muted);font-size:10px;letter-spacing:.08em}.price-feature h3,.compat-price h3{margin:8px 0 6px;font-size:20px}.price-feature p,.compat-price p{margin:0;color:var(--secondary);font-size:12px;line-height:1.6}
.price-feature>strong,.compat-price>strong{display:flex;align-items:baseline;gap:6px;white-space:nowrap;font-variant-numeric:tabular-nums}.price-feature>strong b,.compat-price>strong b{font-size:32px;letter-spacing:-.04em}.price-feature>strong small,.compat-price>strong small{color:var(--muted);font-size:11px}
.pricing-table-wrap{margin-top:14px;overflow-x:auto;border:1px solid var(--line);background:var(--surface);outline:none}.pricing-table-wrap:focus-visible{box-shadow:0 0 0 2px var(--accent)}
.pricing-table{width:100%;min-width:820px;border-collapse:collapse;font-variant-numeric:tabular-nums}.pricing-table caption{padding:20px 24px;text-align:left;border-bottom:1px solid var(--line)}.pricing-table caption strong{font-size:17px}.pricing-table caption span{margin-left:12px;color:var(--accent);font-size:10px;letter-spacing:.08em}.pricing-table th,.pricing-table td{padding:18px 22px;border-bottom:1px solid var(--line-soft);text-align:left;font-size:13px}.pricing-table thead th{color:var(--muted);font-size:10px;font-weight:600;letter-spacing:.08em}.pricing-table tbody tr:last-child>*{border-bottom:0}.pricing-table tbody th strong,.pricing-table tbody th small{display:block}.pricing-table tbody th small{margin-top:5px;color:var(--muted);font-size:10px;font-weight:400}.pricing-table td{color:var(--secondary)}
.calculation-note{display:grid;grid-template-columns:150px 1fr;gap:8px 24px;margin-top:20px;padding:22px 24px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.calculation-note>strong{grid-row:1/3;color:var(--accent);font-size:12px}.calculation-note p{margin:0;color:var(--secondary);font-size:12px;line-height:1.65}.calculation-note b{color:var(--text);font-variant-numeric:tabular-nums}
.billing-flow{display:grid;grid-template-columns:repeat(4,1fr);margin:0;padding:0;border:1px solid var(--line);list-style:none}.billing-flow li{min-height:245px;padding:25px;background:var(--surface)}.billing-flow li+li{border-left:1px solid var(--line)}.billing-flow li>b,.balance-grid article>b{color:var(--accent);font:700 11px/1 Consolas,monospace}.billing-flow strong{display:block;margin:44px 0 12px;font-size:15px}.billing-flow p,.balance-grid p{margin:0;color:var(--secondary);font-size:12px;line-height:1.75}
.exception-ledger{display:grid;grid-template-columns:1fr 1fr 1fr;gap:14px}.exception-ledger article{padding:25px 26px;background:var(--surface)}.exception-ledger article>span{display:block;padding-bottom:15px;border-bottom:1px solid var(--line);font-size:14px;font-weight:700}.exception-ledger ul{display:grid;gap:13px;margin:18px 0 0;padding:0;list-style:none;color:var(--secondary);font-size:12px;line-height:1.7}.exception-ledger li{position:relative;padding-left:15px}.exception-ledger li::before{position:absolute;top:.65em;left:0;width:5px;height:5px;border-radius:50%;background:var(--accent);content:""}.exception-ledger .no-charge>span{color:var(--success)}.exception-ledger .charge>span{color:var(--warning)}.exception-ledger .reversal>span{color:var(--accent)}
.policy-boundary{margin:18px 0 0;padding:18px 20px;border-left:2px solid var(--line);background:var(--surface);color:var(--muted);font-size:11px;line-height:1.75}
.balance-grid{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line)}.balance-grid article{min-height:210px;padding:27px 29px;background:var(--surface)}.balance-grid h3{margin:38px 0 11px;font-size:16px}
.version-policy{display:flex;align-items:end;justify-content:space-between;gap:50px}.version-policy>div{max-width:760px}.version-policy span{display:block;margin-top:18px;color:var(--secondary);font-size:13px;line-height:1.75}

@media (max-width: 860px) {
  .site-header { padding-inline: 22px; }
  .site-header nav { display: none; }
  main, .site-footer { width: min(100% - 36px, 680px); }
  .hero { grid-template-columns: 1fr; gap: 46px; min-height: 0; padding-block: 66px; }
  .hero h1 { font-size: clamp(42px, 12vw, 64px); }
  .client-grid, .install ol { grid-template-columns: 1fr; }
  .client-body { grid-template-columns: 1fr; gap: 20px; }
  .client-card ul { padding: 20px 0 0; border-top: 1px solid var(--line-soft); border-left: 0; }
  .install li + li { border-top: 1px solid var(--line); border-left: 0; }
  .billing-hero{grid-template-columns:1fr;gap:42px;padding-block:68px}.billing-flow{grid-template-columns:1fr 1fr}.billing-flow li:nth-child(3){border-left:0;border-top:1px solid var(--line)}.billing-flow li:nth-child(4){border-top:1px solid var(--line)}.exception-ledger{grid-template-columns:1fr}.version-policy{align-items:flex-start;flex-direction:column}.balance-grid{grid-template-columns:1fr}
}

@media (max-width: 560px) {
  .site-header { min-height: 62px; }
  .brand small { display: none; }
  .hero { padding-block: 52px; }
  .hero h1 { font-size: 39px; }
  .hero-description { font-size: 15px; }
  .hero-actions, .hero-actions .button { width: 100%; }
  .delivery-summary dl div { grid-template-columns: 1fr; gap: 6px; }
  .delivery-summary dd { text-align: left; }
  .downloads, .install { padding-block: 60px; }
  .section-heading { align-items: start; flex-direction: column; }
  .client-card { min-height: 0; padding: 22px; }
  .client-card footer { align-items: stretch; flex-direction: column; }
  .site-footer { align-items: flex-start; flex-direction: column; justify-content: center; }
  .billing-hero{padding-block:52px}.billing-hero h1{font-size:39px}.billing-section{padding-block:58px}.billing-section-heading{align-items:flex-start;flex-direction:column}.price-feature,.compat-price{align-items:flex-start;flex-direction:column;padding:23px}.calculation-note{grid-template-columns:1fr}.calculation-note>strong{grid-row:auto}.billing-flow{grid-template-columns:1fr}.billing-flow li{min-height:0}.billing-flow li+li,.billing-flow li:nth-child(3){border-top:1px solid var(--line);border-left:0}.billing-flow strong{margin-top:28px}.balance-grid article{min-height:0}.price-feature>strong b,.compat-price>strong b{font-size:29px}
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}