:root {
  --bg: #071018;
  --bg-soft: #0b1621;
  --panel: #0f1d2a;
  --panel-2: #122436;
  --fg: #edf3f7;
  --dim: #9eb0bf;
  --muted: #718699;
  --acc: #55e6c1;
  --acc-2: #74b9ff;
  --warn: #ffc46b;
  --danger: #ff8e86;
  --ok: #74e0a0;
  --line: #203548;
  --line-2: #2c4760;
  --shadow: 0 20px 70px rgba(0, 0, 0, .28);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--fg);
  background:
    radial-gradient(circle at 10% -10%, rgba(85, 230, 193, .10), transparent 34rem),
    radial-gradient(circle at 95% 0%, rgba(116, 185, 255, .09), transparent 30rem),
    var(--bg);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", "Noto Sans SC", "Microsoft YaHei", sans-serif;
}
a { color: var(--acc); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; }
.wrap { width: min(1140px, calc(100% - 40px)); margin: 0 auto; padding: 0 0 72px; }

.top {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 0;
  margin-bottom: 0;
  border-bottom: 1px solid rgba(44, 71, 96, .62);
  background: rgba(7, 16, 24, .88);
  backdrop-filter: blur(18px);
}
.brand { font-weight: 760; font-size: 18px; letter-spacing: -.02em; white-space: nowrap; }
.brand small { color: var(--dim); font-weight: 500; margin-left: 8px; letter-spacing: 0; }
nav { display: flex; align-items: center; flex-wrap: wrap; gap: 16px; }
nav a { color: var(--dim); font-size: 14px; }
nav a:hover, nav a.active { color: var(--fg); text-decoration: none; }

.hero { padding: 92px 0 56px; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--acc);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .11em;
  text-transform: uppercase;
}
.eyebrow::before { content: ""; width: 28px; height: 1px; background: var(--acc); }
h1 { max-width: 960px; margin: 18px 0 20px; font-size: clamp(38px, 6vw, 70px); line-height: 1.04; letter-spacing: -.045em; }
h1 .grad { color: var(--acc); }
.lede { max-width: 820px; color: #c4d1db; font-size: clamp(18px, 2.2vw, 22px); line-height: 1.55; }
.sub { color: var(--dim); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 30px 0 22px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 18px;
  border: 1px solid var(--line-2);
  border-radius: 9px;
  background: rgba(15, 29, 42, .72);
  color: var(--fg);
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}
.btn:hover { border-color: var(--acc); text-decoration: none; }
.btn.primary { border-color: transparent; background: var(--acc); color: #05110d; }
.btn.primary:hover { filter: brightness(1.06); }
.btn.secondary { color: var(--acc); }

.trust-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 18px 0 0;
}
.badge {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 11px;
  background: rgba(15, 29, 42, .64);
  color: var(--dim);
  font-size: 13px;
  white-space: nowrap;
}

section { padding: 62px 0 0; }
h2 { margin: 0 0 12px; font-size: clamp(27px, 3vw, 38px); line-height: 1.15; letter-spacing: -.025em; }
h3 { margin: 0 0 8px; font-size: 19px; }
p, li { color: #d6e0e8; }
.section-lede { max-width: 780px; margin: 0 0 28px; color: var(--dim); font-size: 18px; }

.grid { display: grid; gap: 16px; }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 22px;
  background: linear-gradient(180deg, rgba(18, 36, 54, .86), rgba(11, 22, 33, .9));
  box-shadow: var(--shadow);
}
.card p:last-child, .card ul:last-child { margin-bottom: 0; }
.card:hover { border-color: var(--line-2); }
.card .num { color: var(--acc); font: 700 13px/1.4 ui-monospace, Consolas, monospace; letter-spacing: .08em; }
.card-feature { min-height: 180px; }

.flow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 24px;
}
.flow-step { position: relative; }
.flow-step:not(:last-child)::after {
  content: "→";
  position: absolute;
  right: -10px;
  top: 38px;
  color: var(--muted);
}

.price-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.price-card { display: flex; flex-direction: column; min-height: 330px; }
.price-card.featured { border-color: var(--acc); box-shadow: 0 0 0 1px rgba(85, 230, 193, .18), var(--shadow); }
.price { margin: 12px 0 2px; font-size: 29px; font-weight: 800; letter-spacing: -.03em; }
.price-note { color: var(--dim); font-size: 13px; }
.price-card ul { padding-left: 19px; }
.price-card .btn { margin-top: auto; }

.trust-row { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin-top: 20px; }
.trust-item { padding: 16px; border-top: 1px solid var(--line); }
.trust-item strong { display: block; color: var(--fg); margin-bottom: 4px; }
.trust-item span { color: var(--dim); font-size: 14px; }

.callout {
  margin-top: 24px;
  padding: 22px;
  border: 1px solid var(--line-2);
  border-radius: 14px;
  background: rgba(18, 36, 54, .64);
}
.callout .eyebrow { margin-bottom: 10px; }

.page-hero { padding: 78px 0 34px; }
.page-hero h1 { max-width: 900px; font-size: clamp(34px, 5vw, 58px); }
.page-hero .lede { font-size: 20px; }

table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 15px; }
th, td { border-bottom: 1px solid var(--line); padding: 12px 10px; text-align: left; vertical-align: top; }
th { color: var(--dim); font-size: 13px; text-transform: uppercase; letter-spacing: .06em; }

code, pre { font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace; }
code { padding: 2px 6px; border: 1px solid var(--line); border-radius: 5px; background: #07111a; color: #c7f5e8; font-size: .92em; }
pre { overflow: auto; padding: 17px; border: 1px solid var(--line); border-radius: 12px; background: #07111a; color: #d8e8f2; }

.form { display: grid; gap: 14px; max-width: 820px; }
.form-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.field { display: grid; gap: 6px; }
.field label { color: var(--dim); font-size: 14px; }
input, textarea, select {
  width: 100%;
  border: 1px solid var(--line-2);
  border-radius: 9px;
  padding: 11px 12px;
  background: #08131d;
  color: var(--fg);
  font: inherit;
}
textarea { min-height: 120px; resize: vertical; }
.form-note { color: var(--muted); font-size: 13px; }

.list-plain { margin: 16px 0 0; padding: 0; list-style: none; }
.list-plain li { padding: 11px 0; border-bottom: 1px solid var(--line); }
.list-plain li:last-child { border-bottom: 0; }

.official-note {
  margin-top: 18px;
  padding: 14px 16px;
  border-left: 3px solid var(--warn);
  background: rgba(255, 196, 107, .06);
  color: #f0d8aa;
  font-size: 14px;
}

.facts { padding-left: 20px; }
.facts li { margin: 7px 0; }
.src { color: var(--muted); font-size: 13px; }
.not { color: #efb7b1; }
.warn { color: #ffd092; }
.ok { color: var(--ok); }

footer {
  margin-top: 72px;
  padding: 28px 0 0;
  border-top: 1px solid var(--line);
  color: var(--dim);
  font-size: 14px;
}
footer .footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 24px; }
footer ul { margin: 8px 0 0; padding: 0; list-style: none; }
footer li { margin: 4px 0; color: var(--dim); }

@media (max-width: 900px) {
  .grid.four, .price-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .flow { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .flow-step:nth-child(2)::after { display: none; }
  nav { gap: 10px; }
}

@media (max-width: 650px) {
  .wrap { width: min(100% - 28px, 1140px); }
  .top { align-items: flex-start; flex-direction: column; gap: 10px; }
  nav { gap: 10px 14px; }
  .hero { padding-top: 62px; }
  .grid.two, .grid.three, .grid.four, .price-grid, .flow, .form-row, .trust-row, footer .footer-grid {
    grid-template-columns: 1fr;
  }
  .flow-step::after { display: none; }
  h1 { letter-spacing: -.03em; }
  table { display: block; overflow-x: auto; }
}

@media (prefers-reduced-motion: no-preference) {
  .card, .btn { transition: border-color .18s ease, transform .18s ease, filter .18s ease; }
  .card:hover { transform: translateY(-2px); }
}