:root {
  --bg: #0d0e12;
  --panel: #15161c;
  --line: #262833;
  --text: #eceef2;
  --muted: #9aa0ae;
  --accent: #e5484d;
  --accent-soft: rgba(229, 72, 77, 0.14);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 "Segoe UI", system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }

.nav {
  display: flex; align-items: center; gap: 28px;
  max-width: 1060px; margin: 0 auto; padding: 20px 24px;
}
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: 0.06em; font-size: 17px; }
.links { display: flex; gap: 22px; margin-left: auto; font-size: 14px; color: var(--muted); }
.links a:hover { color: var(--text); }
.lang {
  background: transparent; border: 1px solid var(--line); color: var(--muted);
  border-radius: 8px; padding: 5px 12px; font-size: 13px; cursor: pointer;
}
.lang:hover { color: var(--text); border-color: var(--muted); }

.hero { max-width: 800px; margin: 64px auto 0; padding: 0 24px; text-align: center; }
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid var(--line); border-radius: 999px;
  padding: 5px 14px; font-size: 13px; color: var(--muted);
}
.badge .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); animation: pulse 2s infinite; }
@keyframes pulse { 50% { opacity: 0.35; } }
h1 { font-size: clamp(34px, 6vw, 54px); line-height: 1.12; margin: 22px 0 14px; letter-spacing: -0.01em; }
.sub { color: var(--muted); font-size: 18px; max-width: 620px; margin: 0 auto; }
.cta { display: flex; gap: 14px; justify-content: center; margin: 30px 0 12px; flex-wrap: wrap; }
.btn { display: inline-block; border-radius: 10px; padding: 12px 26px; font-weight: 600; font-size: 15px; }
.btn.primary { background: var(--accent); color: #fff; }
.btn.primary:hover { filter: brightness(1.1); }
.btn.ghost { border: 1px solid var(--line); color: var(--muted); }
.btn.ghost:hover { color: var(--text); border-color: var(--muted); }
.btn.big { padding: 15px 34px; font-size: 16px; }
.note { color: var(--muted); font-size: 13px; }

.frame {
  max-width: 760px; margin: 56px auto 0; padding: 0 24px;
}
.chrome {
  display: flex; gap: 7px; padding: 12px 16px;
  background: var(--panel); border: 1px solid var(--line); border-bottom: 0;
  border-radius: 14px 14px 0 0;
}
.chrome i { width: 11px; height: 11px; border-radius: 50%; background: var(--line); }
.screen {
  position: relative; height: 300px; overflow: hidden;
  background: linear-gradient(135deg, #191b23 0%, #101218 60%, #171221 100%);
  border: 1px solid var(--line); border-radius: 0 0 14px 14px;
}
.cursor {
  position: absolute; width: 14px; height: 14px;
  border-left: 3px solid #fff; border-top: 3px solid #fff;
  transform: rotate(-8deg);
  animation: move 6s ease-in-out infinite alternate;
}
.zoomring {
  position: absolute; width: 120px; height: 120px; border-radius: 50%;
  border: 2px solid var(--accent); opacity: 0;
  animation: ring 6s ease-out infinite;
}
@keyframes move {
  0% { left: 30%; top: 60%; } 40% { left: 62%; top: 34%; }
  60% { left: 62%; top: 34%; } 100% { left: 42%; top: 68%; }
}
@keyframes ring {
  0%, 35% { opacity: 0; transform: scale(0.4); }
  42% { opacity: 1; transform: scale(0.9); left: 58%; top: 30%; }
  58% { opacity: 0; transform: scale(1.6); left: 56%; top: 26%; }
  100% { opacity: 0; }
}

.features { max-width: 1060px; margin: 90px auto 0; padding: 0 24px; }
h2 { font-size: clamp(24px, 4vw, 34px); text-align: center; margin: 0 0 34px; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card {
  background: var(--panel); border: 1px solid var(--line); border-radius: 14px;
  padding: 22px 22px 18px;
}
.card h3 { margin: 0 0 8px; font-size: 16px; }
.card p { margin: 0; color: var(--muted); font-size: 14px; }

.download { max-width: 620px; margin: 90px auto; padding: 0 24px; text-align: center; }
.download .btn { margin: 8px 0 10px; }

.foot { border-top: 1px solid var(--line); margin-top: 40px; padding: 40px 24px 28px; }
.cols {
  max-width: 1060px; margin: 0 auto; display: grid;
  grid-template-columns: 2fr 1fr 1fr; gap: 24px;
}
.foot h4 { font-size: 13px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin: 0 0 10px; }
.foot .cols a { display: block; color: var(--muted); font-size: 14px; padding: 3px 0; }
.foot .cols a:hover { color: var(--text); }
.foot .brand { margin-bottom: 6px; }
.legal { max-width: 1060px; margin: 28px auto 0; padding-top: 18px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }

.doc { max-width: 720px; margin: 40px auto 60px; padding: 0 24px; }
.doc h1 { font-size: 32px; margin-bottom: 4px; }
.doc h2 { font-size: 20px; text-align: left; margin: 30px 0 8px; }
.doc ul { color: var(--muted); padding-left: 20px; }
.doc li { margin: 8px 0; }
.doc p { color: var(--muted); }

@media (max-width: 820px) {
  .grid { grid-template-columns: 1fr; }
  .cols { grid-template-columns: 1fr; }
  .links { display: none; }
}