:root {
  --bg: #070d16;
  --bg2: #0b1220;
  --card: #101a2c;
  --card-border: #1c2b42;
  --text: #e5eefb;
  --dim: #8ea3bf;
  --em: #34d399;
  --em2: #10b981;
  --danger: #f87171;
  --warn: #fbbf24;
  --mono: "JetBrains Mono", "Cascadia Code", Consolas, monospace;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  line-height: 1.65;
}
a { color: var(--em); text-decoration: none; }
a:hover { text-decoration: underline; }
.mono { font-family: var(--mono); }
.dim { color: var(--dim); }

/* nav */
.nav { position: sticky; top: 0; z-index: 50; backdrop-filter: blur(14px); background: rgba(7,13,22,.75); border-bottom: 1px solid var(--card-border); }
.nav-inner { max-width: 1080px; margin: 0 auto; padding: 12px 24px; display: flex; align-items: center; justify-content: space-between; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; color: var(--text); }
.brand:hover { text-decoration: none; }
.brand img { width: 34px; height: 34px; }
.nav-links { display: flex; align-items: center; gap: 18px; }
.nav-links > a:not(.btn) { color: var(--dim); font-size: 14px; }
.nav-links > a:not(.btn):hover { color: var(--text); text-decoration: none; }

/* buttons */
.btn { display: inline-block; padding: 8px 18px; border-radius: 10px; font-weight: 600; font-size: 14px; cursor: pointer; border: 1px solid transparent; transition: .15s; }
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: linear-gradient(135deg, var(--em), var(--em2)); color: #04120c; box-shadow: 0 4px 24px rgba(52,211,153,.25); }
.btn-ghost { border-color: var(--card-border); color: var(--text); background: rgba(255,255,255,.03); }
.btn-lg { padding: 14px 28px; font-size: 16px; border-radius: 12px; }

/* hero */
.hero { position: relative; text-align: center; padding: 96px 24px 72px; overflow: hidden; }
.hero-glow { position: absolute; inset: -200px 0 auto; height: 500px; background: radial-gradient(ellipse 60% 55% at 50% 30%, rgba(52,211,153,.16), transparent 70%); pointer-events: none; }
.hero-logo { width: 108px; height: 108px; filter: drop-shadow(0 8px 40px rgba(52,211,153,.35)); animation: float 5s ease-in-out infinite; }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }
.hero h1 { font-size: clamp(28px, 4.6vw, 46px); line-height: 1.3; margin: 26px 0 16px; font-weight: 800; }
.grad { background: linear-gradient(120deg, var(--em), #6ee7b7, var(--em2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero .sub { color: var(--dim); font-size: 16px; }
.hero-cta { margin: 34px 0 22px; display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.hero-addr { display: inline-flex; align-items: center; gap: 12px; background: var(--card); border: 1px solid var(--card-border); padding: 10px 16px; border-radius: 12px; font-size: 14px; color: var(--dim); }
.hero-addr b { color: var(--em); }
.copy { background: rgba(52,211,153,.12); color: var(--em); border: 1px solid rgba(52,211,153,.35); border-radius: 8px; padding: 4px 12px; font-size: 13px; cursor: pointer; }
.copy:hover { background: rgba(52,211,153,.22); }

/* sections */
.section { max-width: 1080px; margin: 0 auto; padding: 64px 24px 8px; }
.section h2 { font-size: 28px; margin-bottom: 10px; }
.section-sub { color: var(--dim); margin-bottom: 22px; font-size: 14px; }
.grid { display: grid; gap: 18px; margin-top: 20px; }
.grid.two { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.grid.three { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid.four { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.card { background: var(--card); border: 1px solid var(--card-border); border-radius: 16px; padding: 24px; transition: .2s; }
.card:hover { border-color: rgba(52,211,153,.4); transform: translateY(-2px); }
.card h3 { font-size: 17px; margin-bottom: 8px; }
.card p { color: var(--dim); font-size: 14px; }
.note { margin-top: 18px; color: var(--dim); font-size: 13px; }

/* nodes */
.live-dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; background: var(--warn); margin-left: 6px; }
.live-dot.ok { background: var(--em); box-shadow: 0 0 10px var(--em); }
.node-head { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 8px; }
.badge { font-size: 12px; color: var(--em); background: rgba(52,211,153,.1); border: 1px solid rgba(52,211,153,.3); padding: 2px 10px; border-radius: 999px; }
.node .addr { font-size: 20px; color: var(--text); margin: 10px 0 4px; }
.node .desc { min-height: 44px; }
.node-meta { display: flex; justify-content: space-between; align-items: center; margin-top: 14px; padding-top: 14px; border-top: 1px dashed var(--card-border); font-size: 13px; }
.status.ok { color: var(--em); }
.status.down { color: var(--danger); }
.status { color: var(--warn); }

/* steps */
.step { text-align: left; position: relative; }
.step-num { width: 40px; height: 40px; border-radius: 12px; background: linear-gradient(135deg, var(--em), var(--em2)); color: #04120c; font-weight: 800; font-size: 18px; display: flex; align-items: center; justify-content: center; margin-bottom: 14px; }

/* code */
.code { background: #0a1120; border: 1px solid var(--card-border); border-radius: 10px; padding: 16px; overflow-x: auto; font-family: var(--mono); font-size: 13px; line-height: 1.7; color: #a5f3d0; margin-top: 10px; }

/* faq */
details.card { margin-bottom: 12px; padding: 18px 22px; }
details.card summary { cursor: pointer; font-weight: 600; font-size: 15px; }
details.card p { margin-top: 10px; }

/* footer */
.footer { text-align: center; padding: 64px 24px 48px; color: var(--dim); font-size: 14px; }
.foot-logo { width: 44px; height: 44px; margin-bottom: 12px; opacity: .9; }
.footer p { margin: 4px 0; }

@media (max-width: 720px) {
  .nav-links > a:not(.btn) { display: none; }
  .hero { padding-top: 64px; }
}