:root {
  --navy: #0b1f3a;
  --navy-2: #102a4c;
  --teal: #2cc5b6;
  --teal-2: #1aa697;
  --blue: #2f6bff;
  --amber: #f0a43a;
  --ink: #0f1b2d;
  --muted: #5b6b80;
  --line: #e3e8ef;
  --soft: #f4f7fb;
  --white: #ffffff;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(11, 31, 58, 0.12);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
.wrap { max-width: 1160px; margin: 0 auto; padding: 0 20px; }

/* nav */
.nav { position: sticky; top: 0; z-index: 10; background: rgba(11, 31, 58, 0.92); backdrop-filter: blur(8px); color: #fff; }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 8px; text-decoration: none; font-weight: 700; font-size: 20px; }
.brand small { font-weight: 400; font-size: 13px; color: #9fb7d6; }
.nav-links { display: flex; align-items: center; gap: 22px; font-size: 15px; }
.nav-links a { text-decoration: none; color: #d6e3f5; }
.nav-links a:hover { color: #fff; }

/* buttons */
.btn { display: inline-block; padding: 12px 22px; border-radius: 10px; background: var(--teal); color: #05202a !important; font-weight: 600; text-decoration: none; border: 1px solid var(--teal); transition: background .15s; }
.btn:hover { background: #4fd6c9; }
.btn-sm { padding: 7px 14px; font-size: 14px; }
.btn-ghost { background: transparent; color: #e8f1ff !important; border-color: rgba(232, 241, 255, 0.4); }
.btn-ghost:hover { background: rgba(255, 255, 255, 0.08); }
.btn-ghost-light { background: transparent; color: #e8f1ff !important; border-color: rgba(44, 197, 182, 0.7); }
.btn-ghost-light:hover { background: rgba(44, 197, 182, 0.15); }

/* hero */
.hero { background: radial-gradient(1200px 500px at 85% -10%, rgba(44, 197, 182, 0.25), transparent 60%), linear-gradient(180deg, var(--navy), var(--navy-2)); color: #e8f1ff; padding: 80px 0 90px; }
.hero-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 56px; align-items: center; }
.eyebrow { margin: 0 0 12px; color: var(--teal); font-weight: 600; letter-spacing: .04em; font-size: 14px; }
.eyebrow.dark { color: var(--teal-2); }
h1 { font-size: clamp(32px, 4.6vw, 52px); line-height: 1.2; margin: 0 0 20px; color: #fff; letter-spacing: .01em; }
h2 { font-size: clamp(26px, 3.2vw, 36px); line-height: 1.3; margin: 0 0 28px; }
h3 { font-size: 18px; margin: 0 0 8px; }
.lead { font-size: 17px; color: #c3d4ea; max-width: 620px; margin: 0 0 28px; }
.cta { display: flex; gap: 14px; flex-wrap: wrap; }
.facts { list-style: none; display: flex; flex-wrap: wrap; gap: 10px 26px; padding: 0; margin: 32px 0 0; color: #9fb7d6; font-size: 14px; }
.facts strong { color: #fff; }

.hero-card { background: rgba(255, 255, 255, 0.06); border: 1px solid rgba(255, 255, 255, 0.12); border-radius: 18px; padding: 18px; box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3); }
.hc-head { display: flex; align-items: center; gap: 6px; margin-bottom: 14px; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: rgba(255, 255, 255, 0.25); }
.hc-title { margin-left: 8px; font-size: 13px; color: #9fb7d6; }
.hc-item { background: rgba(255, 255, 255, 0.06); border-radius: 12px; padding: 14px; margin-top: 10px; }
.hc-item p { margin: 8px 0 0; font-size: 14px; color: #dbe7f7; }
.hc-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 10px; }
.chip { font-size: 12px; padding: 4px 10px; border-radius: 999px; border: 1px solid rgba(255, 255, 255, 0.3); color: #dbe7f7; }
.chip-solid { background: var(--teal); border-color: var(--teal); color: #05202a; font-weight: 600; }
.tag { font-size: 12px; padding: 2px 8px; border-radius: 6px; font-weight: 600; }
.tag-teal { background: rgba(44, 197, 182, 0.2); color: #6ee3d7; }
.tag-blue { background: rgba(47, 107, 255, 0.25); color: #9db9ff; }
.tag-amber { background: rgba(240, 164, 58, 0.22); color: #f6c27c; }

/* sections */
.section { padding: 84px 0; }
.section-dark { background: var(--navy); color: #e8f1ff; }
.section-dark h2 { color: #fff; }
.section-soft { background: var(--soft); }
.sub { color: #9fb7d6; max-width: 760px; margin: -12px 0 32px; }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }

.sys { border-radius: var(--radius); padding: 28px; border: 1px solid rgba(255, 255, 255, 0.12); background: linear-gradient(160deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.02)); }
.sys-zs { box-shadow: inset 0 3px 0 var(--teal); }
.sys-zz { box-shadow: inset 0 3px 0 var(--blue); }
.sys-head { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.sys-head h3 { margin: 0; font-size: 20px; color: #fff; }
.sys-badge { font-size: 13px; font-weight: 700; padding: 3px 10px; border-radius: 8px; background: rgba(44, 197, 182, 0.2); color: #6ee3d7; }
.sys-zz .sys-badge { background: rgba(47, 107, 255, 0.25); color: #9db9ff; }
.sys ul { margin: 0 0 22px; padding-left: 18px; color: #c3d4ea; font-size: 15px; }
.sys li { margin: 6px 0; }
.sys b { color: #fff; }
.note { margin: 28px 0 0; color: #9fb7d6; font-size: 14px; }
.note a { color: var(--teal); }

.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.steps li { display: flex; gap: 16px; background: var(--soft); border-radius: var(--radius); padding: 22px; }
.steps span { flex: 0 0 36px; height: 36px; border-radius: 50%; background: var(--navy); color: #fff; display: grid; place-items: center; font-weight: 700; }
.steps p { margin: 0; color: var(--muted); font-size: 15px; }

.dl-card h3 { font-size: 22px; }
.meta { color: var(--muted); font-size: 14px; margin: 0 0 14px !important; }
.status { color: var(--ink) !important; font-weight: 600; }
.dl-card .btn { margin-top: 6px; }
.sha { margin-top: 12px !important; font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 12px !important; word-break: break-all; color: var(--muted); }
.install { margin-top: 26px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 22px; }
.install summary { cursor: pointer; font-weight: 600; }
.install p { color: var(--muted); font-size: 15px; }

.footer { background: #08172c; color: #9fb7d6; padding: 40px 0; font-size: 14px; }
.foot-inner { display: flex; flex-wrap: wrap; gap: 24px; justify-content: space-between; align-items: flex-start; }
.footer strong { color: #fff; }
.footer p { margin: 4px 0 0; }
.foot-links { display: flex; gap: 18px; flex-wrap: wrap; }
.foot-links a { text-decoration: none; }
.foot-links a:hover { color: #fff; }
.icp { width: 100%; margin: 0; }
.icp a { text-decoration: none; }

@media (max-width: 900px) {
  .hero-grid, .grid3, .grid2, .steps { grid-template-columns: 1fr; }
  .hero { padding: 56px 0 64px; }
  .nav-links a:not(.btn) { display: none; }
  .section { padding: 60px 0; }
}