:root {
  --blue: #2563eb;
  --blue-light: #3b82f6;
  --ink: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --bg: #f8fafc;
  --card: #ffffff;
  --radius: 16px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
    "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(160deg, #eff6ff 0%, #ffffff 60%);
  border-bottom: 1px solid var(--line);
  padding: 56px 0 48px;
  text-align: center;
}

.logo {
  border-radius: 20px;
  box-shadow: 0 10px 28px rgba(37, 99, 235, .22);
}

.hero h1 {
  font-size: clamp(28px, 5vw, 40px);
  margin: 20px 0 8px;
  letter-spacing: -.02em;
}

.tagline {
  font-size: clamp(16px, 2.4vw, 19px);
  color: var(--ink);
  margin: 0 0 6px;
  font-weight: 500;
}

.sub {
  color: var(--muted);
  margin: 0 0 32px;
  font-size: 15px;
}
.sub strong { color: var(--blue); }

/* ---------- Download cards ---------- */
.downloads {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  max-width: 660px;
  margin: 0 auto;
}

.dl-card {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
  text-decoration: none;
  color: inherit;
  transition: border-color .18s, box-shadow .18s, transform .18s;
}
.dl-card:hover {
  border-color: var(--blue-light);
  box-shadow: 0 8px 24px rgba(37, 99, 235, .14);
  transform: translateY(-2px);
}

.dl-icon {
  flex: 0 0 40px;
  height: 40px;
  display: grid;
  place-items: center;
  background: #eff6ff;
  color: var(--blue);
  border-radius: 11px;
}
.dl-icon svg { width: 22px; height: 22px; }

.dl-text { display: flex; flex-direction: column; text-align: left; }
.dl-title { font-weight: 600; font-size: 15px; }
.dl-meta { font-size: 12.5px; color: var(--muted); }

.dl-note {
  margin: 20px 0 0;
  font-size: 13px;
  color: var(--muted);
}

.downloads.compact { max-width: 380px; }
.downloads.compact .dl-card { padding: 12px 18px; justify-content: center; }

/* ---------- Trial ---------- */
.trial { padding: 56px 0; }

.section-head {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.trial h2, .features h2 {
  font-size: clamp(21px, 3.4vw, 26px);
  margin: 0;
  letter-spacing: -.01em;
}

.badge {
  font-size: 13px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
  background: #eff6ff;
  color: var(--blue);
  border: 1px solid #bfdbfe;
}
.badge.out {
  background: #fffbeb;
  color: #b45309;
  border-color: #fde68a;
}

.section-sub {
  color: var(--muted);
  margin: 8px 0 22px;
  font-size: 14.5px;
}

.trial-frame {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 4px 18px rgba(15, 23, 42, .05);
}
.trial-frame iframe {
  display: block;
  width: 100%;
  height: 780px;
  border: 0;
}

.trial-locked {
  background: var(--card);
  border: 1px solid #fde68a;
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
}
.trial-locked p { margin: 0 0 8px; color: var(--muted); }
.trial-locked p strong { color: var(--ink); font-size: 17px; }
.trial-locked .downloads { margin-top: 20px; }

/* ---------- Features ---------- */
.features {
  padding: 8px 0 64px;
}
.features h2 { margin-bottom: 22px; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(168px, 1fr));
  gap: 12px;
}

.feat {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 13px 15px;
  font-size: 14px;
}
.feat .dot {
  flex: 0 0 8px;
  height: 8px;
  border-radius: 50%;
}

/* ---------- Footer ---------- */
footer {
  border-top: 1px solid var(--line);
  background: var(--card);
  padding: 26px 0;
  text-align: center;
}
.privacy {
  margin: 0 0 6px;
  color: var(--blue);
  font-weight: 600;
  font-size: 14px;
}
.copy { margin: 0; color: var(--muted); font-size: 13px; }

@media (max-width: 560px) {
  .hero { padding: 40px 0 36px; }
  .trial-frame iframe { height: 620px; }
}