:root {
  --bg: #f3f7fa;
  --ink: #0b1f33;
  --muted: #5b7388;
  --accent: #0096c7;
  --navy: #001628;
  --cyan: #22d3ee;
  --line: #d5e4ee;
  --surface: #ffffff;
  --radius: 16px;
  --max: 1080px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Noto Sans SC", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.55;
  font-size: 16px;
}

a { color: var(--accent); text-decoration: none; }
img { max-width: 100%; display: block; }

.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 14px 24px;
  background: rgba(0, 22, 40, 0.92);
  backdrop-filter: blur(10px);
  color: #e0f7fa;
}
.nav a { color: inherit; }
.nav nav { display: flex; gap: 18px; margin-left: auto; font-size: 14px; }
.logo {
  font-weight: 700;
  letter-spacing: 0.12em;
  font-size: 14px;
}
.lang {
  border: 1px solid #1a3f5c;
  background: transparent;
  color: var(--cyan);
  border-radius: 999px;
  padding: 4px 10px;
  cursor: pointer;
  font-size: 12px;
}

.hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
  max-width: var(--max);
  margin: 0 auto;
  padding: 56px 24px 40px;
}
.eyebrow {
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.08em;
  font-size: 13px;
  margin: 0 0 8px;
}
h1 {
  font-size: 36px;
  line-height: 1.25;
  margin: 0 0 16px;
  font-weight: 700;
}
.lead { color: var(--muted); margin: 0 0 20px; max-width: 40em; }
.checks {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.checks li {
  background: #e6f6fb;
  color: #005f7f;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
}
.hero-img {
  border-radius: var(--radius);
  box-shadow: 0 16px 40px rgba(0, 22, 40, 0.18);
}

.section { max-width: var(--max); margin: 0 auto; padding: 48px 24px; }
.section.tint { background: var(--surface); max-width: none; padding-left: 0; padding-right: 0; }
.section.tint > * { max-width: var(--max); margin-left: auto; margin-right: auto; padding-left: 24px; padding-right: 24px; }
.section-head { margin-bottom: 28px; }
.section-head h2 { margin: 0 0 8px; font-size: 24px; }
.section-head p { margin: 0; color: var(--muted); }

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
}
.split img { border-radius: var(--radius); background: #fff; }
.feature-list { padding-left: 18px; color: var(--muted); }
.feature-list li { margin: 8px 0; }

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.grid.four { grid-template-columns: repeat(4, 1fr); }
.grid article {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
}
.section.tint .grid article { background: var(--bg); }
.grid h3 { margin: 0 0 8px; font-size: 16px; }
.grid p { margin: 0; color: var(--muted); font-size: 14px; }
.grid.four article {
  text-align: center;
  font-weight: 600;
}

.steps { list-style: none; padding: 0; margin: 0; display: grid; gap: 20px; }
.steps li { display: flex; gap: 16px; align-items: flex-start; }
.steps span {
  flex: 0 0 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--navy);
  color: var(--cyan);
  display: grid;
  place-items: center;
  font-weight: 700;
}
.steps h3 { margin: 0 0 4px; font-size: 16px; }
.steps p { margin: 0; color: var(--muted); }

.story-img {
  border-radius: var(--radius);
  margin: 0 auto;
  box-shadow: 0 8px 24px rgba(0, 22, 40, 0.1);
}

footer {
  background: var(--navy);
  color: #7aa0b8;
  text-align: center;
  padding: 40px 24px 32px;
}
footer .logo { color: #e0f7fa; margin-bottom: 8px; }
footer a { color: var(--cyan); }
.legal { margin-top: 16px; }
.legal span { margin: 0 8px; color: #1a3f5c; }
.copy { font-size: 12px; margin-top: 16px; }
.beian { font-size: 12px; margin-top: 8px; }
.beian a { color: #7aa0b8; }
.beian a:hover { color: var(--cyan); }

@media (max-width: 800px) {
  .nav nav { display: none; }
  .hero, .split, .grid, .grid.four { grid-template-columns: 1fr; }
  h1 { font-size: 28px; }
  .hero { padding-top: 32px; }
}