* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: #0f172a;
  background: #e0f2fe;
  line-height: 1.6;
}
a { color: inherit; }
.wrap { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }

.top {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(224, 242, 254, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(14, 165, 233, 0.12);
}
.bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  gap: 16px;
}
.brand {
  text-decoration: none;
  font-weight: 900;
  font-size: 22px;
  white-space: nowrap;
}
nav { display: flex; align-items: center; gap: 8px 22px; flex-wrap: wrap; }
nav a { text-decoration: none; font-weight: 700; color: #0369a1; }
nav .go {
  background: #0284c7;
  color: #fff;
  border-radius: 999px;
  padding: 8px 14px;
}

.hero {
  background: linear-gradient(180deg, #bae6fd 0%, #e0f2fe 55%, #fef9c3 100%);
  padding: 48px 0 64px;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}
.eyebrow { margin: 0 0 8px; color: #0369a1; font-weight: 800; }
h1 { margin: 0 0 16px; font-size: clamp(32px, 5vw, 56px); line-height: 1.15; }
.lead { margin: 0 0 24px; font-size: 18px; color: #334155; max-width: 34em; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 28px; }
.btn {
  display: inline-block;
  text-decoration: none;
  background: #ea580c;
  color: #fff;
  font-weight: 800;
  border-radius: 999px;
  padding: 12px 20px;
}
.btn.ghost { background: #fff; color: #0f172a; }
.nums { display: flex; gap: 28px; }
.nums b { display: block; font-size: 32px; color: #ea580c; line-height: 1; }
.nums span { color: #64748b; font-size: 13px; }

.phone {
  background: #fff;
  border-radius: 36px;
  padding: 18px;
  box-shadow: 0 24px 0 rgba(15, 23, 42, 0.06);
}
.phone-screen {
  background: linear-gradient(180deg, #7dd3fc, #fde68a);
  border-radius: 28px;
  min-height: 360px;
  padding: 36px 24px;
}
.mini { margin: 0; color: #075985; font-weight: 800; }
.phone-name { margin: 8px 0 6px; font-size: 32px; font-weight: 900; }
.phone-tip { margin: 0 0 28px; color: #334155; }
.islands-mini { display: grid; gap: 10px; }
.islands-mini span {
  background: rgba(255,255,255,.86);
  border-radius: 16px;
  padding: 12px 14px;
  font-weight: 800;
}

.block { padding: 64px 0; }
.block.sand { background: #fef9c3; }
h2 { margin: 0 0 8px; font-size: clamp(26px, 3vw, 36px); }
.sub { margin: 0 0 28px; color: #475569; }
.cards { display: grid; gap: 16px; }
.cards.three { grid-template-columns: repeat(3, 1fr); }
.cards.grades { grid-template-columns: repeat(6, 1fr); }
.card {
  background: #fff;
  border-radius: 22px;
  padding: 22px;
  box-shadow: 0 10px 0 rgba(15, 23, 42, 0.04);
}
.card.green { border-top: 8px solid #22c55e; }
.card.orange { border-top: 8px solid #f97316; }
.card.blue { border-top: 8px solid #3b82f6; }
.emo { font-size: 40px; }
.card h3 { margin: 8px 0 6px; }
.card p { margin: 0; color: #475569; }
.card b { font-size: 28px; }

.chips { display: flex; flex-wrap: wrap; gap: 12px; }
.chips span {
  background: #fff;
  border-radius: 999px;
  padding: 10px 16px;
  font-weight: 800;
}

.start { background: #0ea5e9; color: #fff; }
.start .start-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 32px;
  align-items: center;
}
.start ol { margin: 16px 0 0; padding-left: 20px; font-size: 18px; }
.start li { margin: 8px 0; }
.search-card {
  background: #fff;
  color: #0f172a;
  border-radius: 24px;
  padding: 28px;
  text-align: center;
}
.search-card p { margin: 0; }
.search-card .big { margin: 8px 0; font-size: 30px; font-weight: 900; color: #ea580c; }
.muted { color: #64748b; }

footer { background: #0f172a; color: #cbd5e1; padding: 22px 0; }
.foot { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }

@media (max-width: 900px) {
  .hero-grid, .start-grid, .cards.three { grid-template-columns: 1fr; }
  .cards.grades { grid-template-columns: repeat(3, 1fr); }
  h1 br { display: none; }
}

@media (max-width: 640px) {
  .bar { flex-direction: column; align-items: flex-start; padding: 12px 0; min-height: 0; }
  nav { width: 100%; }
  .cards.grades { grid-template-columns: repeat(2, 1fr); }
  .nums { gap: 18px; }
  .block { padding: 40px 0; }
}