:root {
  --bg: #070a10;
  --bg2: #0b1018;
  --card: #0f1622;
  --line: #1d2939;
  --line2: #2b3d55;
  --text: #e9eef7;
  --muted: #93a0b4;
  --accent: #5b8cff;
  --accent2: #8b5cf6;
  --green: #3ddc97;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background:
    radial-gradient(1100px 560px at 80% -8%, rgba(91, 140, 255, 0.13), transparent 60%),
    radial-gradient(900px 520px at -10% 30%, rgba(139, 92, 246, 0.09), transparent 60%),
    var(--bg);
  color: var(--text);
  font-family: "Segoe UI", "Microsoft YaHei UI", "Microsoft JhengHei UI", system-ui, sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ---------- nav ---------- */

.nav {
  position: sticky; top: 0; z-index: 40;
  background: rgba(7, 10, 16, 0.78);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: 1160px; margin: 0 auto;
  display: flex; align-items: center; gap: 28px;
  padding: 14px 26px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; }
.brand img { width: 30px; height: 30px; border-radius: 8px; }
.nav-links { display: flex; gap: 22px; margin-left: 14px; flex: 1; }
.nav-links a { color: var(--muted); font-size: 14px; transition: color 0.15s; }
.nav-links a:hover { color: var(--text); }

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

.btn {
  display: inline-flex; align-items: center; gap: 10px; justify-content: center;
  border-radius: 11px; border: 1px solid var(--line2);
  padding: 10px 18px; font-size: 14px; font-weight: 500;
  transition: all 0.16s; white-space: nowrap;
}
.btn:hover { border-color: var(--accent); }
.btn.small { padding: 7px 14px; font-size: 13px; }
.btn.big { padding: 13px 26px; font-size: 15px; border-radius: 12px; }
.btn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  border: 0; color: #fff; font-weight: 650;
  box-shadow: 0 8px 26px rgba(91, 140, 255, 0.35);
}
.btn.primary:hover { filter: brightness(1.08); transform: translateY(-1px); }
.btn.primary .sub { font-size: 12px; font-weight: 400; opacity: 0.85; }
.btn.ghost { background: rgba(255, 255, 255, 0.02); }

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

.hero { max-width: 1160px; margin: 0 auto; padding: 74px 26px 40px; }
.hero-inner { display: grid; grid-template-columns: 1.05fr 1fr; gap: 52px; align-items: center; }
.badge {
  display: inline-block;
  font-size: 12.5px; color: #a9b8dc;
  border: 1px solid var(--line2);
  background: rgba(91, 140, 255, 0.08);
  border-radius: 999px; padding: 5px 13px; margin-bottom: 20px;
}
h1 { font-size: 42px; line-height: 1.22; letter-spacing: 0.3px; font-weight: 750; }
.grad {
  background: linear-gradient(92deg, #6ea8ff, #a78bfa 60%, #3ddc97);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lead { color: var(--muted); font-size: 16px; margin: 18px 0 26px; max-width: 520px; }
.cta { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-meta { color: #6b7890; font-size: 12.5px; margin-top: 18px; }

.hero-shot { position: relative; }
.hero-shot .glow {
  position: absolute; inset: -8% -6%;
  background: radial-gradient(closest-side, rgba(91, 140, 255, 0.22), transparent 75%);
  filter: blur(30px); z-index: 0;
}
.frame {
  position: relative; z-index: 1;
  border: 1px solid var(--line2);
  border-radius: 14px;
  background: var(--bg2);
  overflow: hidden;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.55);
}
.frame-bar { display: flex; gap: 6px; padding: 10px 12px; border-bottom: 1px solid var(--line); }
.frame-bar span { width: 10px; height: 10px; border-radius: 50%; background: #2b3d55; }
.frame-bar span:nth-child(1) { background: #ff5f57; }
.frame-bar span:nth-child(2) { background: #febc2e; }
.frame-bar span:nth-child(3) { background: #28c840; }
.frame img { width: 100%; }

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

.section { max-width: 1160px; margin: 0 auto; padding: 64px 26px 20px; }
.section h2 { font-size: 27px; font-weight: 700; letter-spacing: 0.3px; }
.section-sub { color: var(--muted); margin: 8px 0 30px; font-size: 14.5px; }

.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feature {
  background: linear-gradient(180deg, var(--card), var(--bg2));
  border: 1px solid var(--line);
  border-radius: 15px;
  padding: 22px;
  transition: border-color 0.16s, transform 0.16s;
}
.feature:hover { border-color: var(--line2); transform: translateY(-2px); }
.ficon {
  width: 42px; height: 42px; border-radius: 11px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
  background: rgba(91, 140, 255, 0.10);
  border: 1px solid rgba(91, 140, 255, 0.22);
  margin-bottom: 14px;
}
.feature h3 { font-size: 16px; margin-bottom: 7px; }
.feature p { color: var(--muted); font-size: 13.5px; }

.shots { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.shots figure {
  border: 1px solid var(--line);
  border-radius: 15px;
  overflow: hidden;
  background: var(--bg2);
}
.shots img { border-bottom: 1px solid var(--line); }
.shots figcaption { padding: 13px 18px; color: var(--muted); font-size: 13px; }

/* ---------- clients ---------- */

.clients { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.client {
  border: 1px solid var(--line);
  background: var(--bg2);
  border-radius: 14px;
  padding: 18px 20px;
  transition: border-color 0.16s, background 0.16s;
}
.client:hover { border-color: rgba(91, 140, 255, 0.55); background: var(--card); }
.client h3 { font-size: 15px; margin-bottom: 4px; }
.client p { color: var(--muted); font-size: 12.5px; }

/* ---------- downloads ---------- */

.downloads { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.dl-card { border: 1px solid var(--line); background: var(--bg2); border-radius: 15px; padding: 22px; }
.dl-card.featured { border-color: rgba(91, 140, 255, 0.5); background: linear-gradient(180deg, rgba(91, 140, 255, 0.10), var(--bg2)); }
.dl-head { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.dl-head h3 { font-size: 16px; }
.dl-card p { color: var(--muted); font-size: 13.5px; min-height: 44px; }
.dl-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 14px; }
.pill { font-size: 11px; color: #9fc0ff; border: 1px solid rgba(91, 140, 255, 0.4); border-radius: 999px; padding: 2px 9px; white-space: nowrap; }
.dl-note { color: #6b7890; font-size: 12.5px; margin-top: 16px; }
.link { color: #9fc0ff; text-decoration: underline; text-underline-offset: 3px; }

/* ---------- faq ---------- */

.faq { display: flex; flex-direction: column; gap: 10px; }
.faq details {
  border: 1px solid var(--line);
  border-radius: 13px;
  background: var(--bg2);
  padding: 0 20px;
}
.faq summary {
  cursor: pointer;
  padding: 16px 0;
  font-size: 14.5px;
  font-weight: 550;
  list-style: none;
  position: relative;
  padding-right: 28px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute; right: 2px; top: 50%;
  transform: translateY(-50%);
  color: var(--muted); font-size: 18px;
  transition: transform 0.15s;
}
.faq details[open] summary::after { content: "–"; }
.faq details p { color: var(--muted); font-size: 13.5px; padding: 0 0 16px; max-width: 820px; }

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

footer { border-top: 1px solid var(--line); margin-top: 70px; background: #060910; }
.foot-inner { max-width: 1160px; margin: 0 auto; padding: 38px 26px 46px; }
.foot-brand { display: flex; align-items: center; gap: 9px; font-weight: 700; margin-bottom: 14px; }
.foot-brand img { width: 24px; height: 24px; border-radius: 6px; }
.disclaimer { color: #74829a; font-size: 12.5px; line-height: 1.85; }
.foot-links { display: flex; gap: 20px; margin-top: 18px; font-size: 13px; color: var(--muted); }
.foot-links a:hover { color: var(--text); }

@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  h1 { font-size: 33px; }
  .features { grid-template-columns: 1fr 1fr; }
  .clients { grid-template-columns: 1fr 1fr; }
  .downloads { grid-template-columns: 1fr; }
  .shots { grid-template-columns: 1fr; }
  .nav-links { display: none; }
}
@media (max-width: 620px) {
  .features { grid-template-columns: 1fr; }
  .clients { grid-template-columns: 1fr; }
  .cta { flex-direction: column; align-items: stretch; }
}