:root {
  --bg: #070a14;
  --bg-soft: #0b1020;
  --panel: #0d1424;
  --line: rgba(255, 255, 255, 0.09);
  --line-strong: rgba(255, 255, 255, 0.16);
  --text: #e9eefb;
  --muted: #93a0bb;
  --brand: #4f8cff;
  --brand-strong: #2f74ff;
  --accent: #35d19a;
  --warn: #ffcc66;
  --radius: 16px;
  --max: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }

.wrap {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  background: rgba(7, 10, 20, 0.78);
  border-bottom: 1px solid var(--line);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  gap: 16px;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 650;
  letter-spacing: 0.2px;
  flex-shrink: 0;
}

.brand img { width: 28px; height: 28px; border-radius: 8px; }

.nav {
  display: flex;
  gap: 22px;
  margin-left: 18px;
  font-size: 14px;
  color: var(--muted);
}

.nav a:hover { color: var(--text); }

.header-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 42px;
  padding: 0 18px;
  border-radius: 10px;
  font-size: 14.5px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
  white-space: nowrap;
}

.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 8px 24px rgba(79, 140, 255, 0.28);
}

.btn-primary:hover { background: var(--brand-strong); }

.btn-ghost {
  border-color: var(--line-strong);
  color: var(--text);
  background: rgba(255, 255, 255, 0.03);
}

.btn-ghost:hover { border-color: rgba(255, 255, 255, 0.32); }

.btn-small { height: 34px; padding: 0 14px; font-size: 13.5px; }

/* ---------- hero ---------- */

.hero {
  position: relative;
  padding: 84px 0 72px;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -220px;
  left: 50%;
  width: 900px;
  height: 520px;
  transform: translateX(-50%);
  background: radial-gradient(ellipse at center, rgba(79, 140, 255, 0.22), transparent 65%);
  pointer-events: none;
}

.hero .wrap {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 56px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px 5px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 12.5px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.03);
}

.dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(53, 209, 154, 0.14);
}

h1 {
  margin: 20px 0 0;
  font-size: clamp(32px, 5.2vw, 54px);
  line-height: 1.18;
  letter-spacing: -0.5px;
  font-weight: 700;
}

h1 .grad {
  background: linear-gradient(96deg, #7fb0ff 0%, #35d19a 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lede {
  margin: 20px 0 0;
  max-width: 33em;
  font-size: 17px;
  color: var(--muted);
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.hero-meta {
  margin-top: 18px;
  font-size: 13px;
  color: #6d7893;
}

.hero-art {
  position: relative;
  display: flex;
  justify-content: center;
}

.hero-art img {
  width: min(300px, 70vw);
  height: auto;
  border-radius: 30%;
  filter: drop-shadow(0 30px 60px rgba(79, 140, 255, 0.35));
}

/* ---------- sections ---------- */

section { padding: 76px 0; border-top: 1px solid var(--line); }

.section-head { max-width: 40em; }

.section-head h2 {
  margin: 0;
  font-size: clamp(24px, 3.4vw, 32px);
  letter-spacing: -0.3px;
  line-height: 1.3;
}

.section-head p {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 15.5px;
}

/* ---------- before / after ---------- */

.compare {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 40px;
}

.compare-col {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 8px 22px 14px;
  background: var(--panel);
}

.compare-col.after {
  border-color: rgba(53, 209, 154, 0.28);
  background: linear-gradient(180deg, rgba(53, 209, 154, 0.07), transparent 55%), var(--panel);
}

.compare-col h3 {
  margin: 16px 0 8px;
  font-size: 13px;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
}

.compare-col.after h3 { color: var(--accent); }

.compare-col ul { margin: 0; padding: 0; list-style: none; }

.compare-col li {
  padding: 10px 0;
  border-top: 1px solid var(--line);
  font-size: 14.5px;
  color: #c4cee2;
}

.compare-col.before li { color: #8b96ae; }

/* ---------- cards ---------- */

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 40px;
}

.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 22px;
  background: var(--panel);
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.card:hover {
  border-color: rgba(79, 140, 255, 0.4);
  transform: translateY(-2px);
}

.card .num {
  font-size: 12px;
  letter-spacing: 1.6px;
  color: var(--brand);
  font-weight: 700;
}

.card h3 { margin: 12px 0 8px; font-size: 19px; }

.card p { margin: 0; color: var(--muted); font-size: 14.5px; }

/* ---------- table ---------- */

.table-wrap {
  margin-top: 36px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel);
}

table { width: 100%; border-collapse: collapse; font-size: 14.5px; }

thead th {
  text-align: left;
  padding: 14px 20px;
  font-size: 12px;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
  background: rgba(255, 255, 255, 0.02);
  border-bottom: 1px solid var(--line);
}

tbody td {
  padding: 14px 20px;
  border-top: 1px solid var(--line);
  color: #c4cee2;
  vertical-align: top;
}

tbody tr:first-child td { border-top: none; }

tbody td:first-child { color: var(--text); font-weight: 600; }

/* ---------- steps ---------- */

.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 40px;
  counter-reset: step;
}

.step {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px 22px;
  background: var(--panel);
}

.step::before {
  counter-increment: step;
  content: counter(step);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: rgba(79, 140, 255, 0.16);
  color: var(--brand);
  font-size: 13px;
  font-weight: 700;
}

.step h3 { margin: 12px 0 6px; font-size: 16.5px; }

.step p { margin: 0; color: var(--muted); font-size: 14px; }

pre {
  margin: 24px 0 0;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #060911;
  overflow-x: auto;
  font-size: 13.5px;
  line-height: 1.6;
}

code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

pre code { color: #cfe0ff; }

/* ---------- security ---------- */

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 32px;
  margin-top: 36px;
  padding: 0;
  list-style: none;
}

.grid-2 li {
  position: relative;
  padding-left: 26px;
  color: var(--muted);
  font-size: 14.5px;
}

.grid-2 li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 12px;
  height: 7px;
  border-left: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent);
  transform: rotate(-45deg);
}

.grid-2 strong { color: var(--text); font-weight: 600; }

/* ---------- platforms ---------- */

.pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 32px;
  padding: 0;
  list-style: none;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13.5px;
  color: #b6c1d6;
  background: rgba(255, 255, 255, 0.02);
}

.pill b { color: var(--text); font-weight: 600; }

.pill .dot { width: 6px; height: 6px; box-shadow: none; }

.dot.ok { background: var(--accent); }
.dot.wip { background: var(--warn); }
.dot.hold { background: #5d6a85; }

/* ---------- footer ---------- */

.site-footer {
  border-top: 1px solid var(--line);
  padding: 48px 0 56px;
  font-size: 13.5px;
  color: #7d89a3;
}

.footer-top {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  justify-content: space-between;
  align-items: flex-start;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  max-width: 34em;
}

.footer-links a:hover { color: var(--text); }

.footer-note {
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  justify-content: space-between;
  font-size: 12.5px;
  color: #616d86;
}

/* ---------- responsive ---------- */

@media (max-width: 900px) {
  .hero .wrap { grid-template-columns: 1fr; gap: 40px; }
  .hero { padding: 56px 0 48px; }
  .hero-art { order: -1; }
  .hero-art img { width: 160px; height: auto; }
  .cards, .steps { grid-template-columns: 1fr; }
  .compare { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .nav { display: none; }
  section { padding: 56px 0; }
}

@media (max-width: 560px) {
  .wrap { padding: 0 18px; }
  .hero-cta .btn { width: 100%; }
  thead th:nth-child(2), tbody td:nth-child(2) { display: none; }
  .footer-top { flex-direction: column; }
}