:root {
  --yellow: #ffd84d;
  --cream: #fff8e1;
  --ink: #2b2118;
  --brown: #7a6652;
  --orange: #ff8a3d;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--cream);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
}

.wrap { max-width: 560px; margin: 0 auto; padding: 0 22px 110px; }

header { display: flex; align-items: center; gap: 8px; padding: 18px 0; font-weight: 700; font-size: 17px; }
header img { width: 30px; }

.hero { text-align: center; padding: 12px 0 8px; }
.chick { width: 150px; animation: bob 2.4s ease-in-out infinite; }
h1 { margin: 10px 0 8px; font-size: 32px; line-height: 1.25; }
h1 span { background: linear-gradient(transparent 62%, var(--yellow) 62%); }
.sub { margin: 0 auto 22px; max-width: 320px; color: var(--brown); font-size: 15px; }
h2 { margin: 48px 0 14px; font-size: 20px; }

.btn {
  display: block;
  width: 100%;
  padding: 14px;
  border: 2px solid var(--ink);
  border-radius: 14px;
  background: var(--yellow);
  color: var(--ink);
  font: inherit;
  font-size: 17px;
  font-weight: 700;
  text-align: center;
  text-decoration: none;
  box-shadow: 0 4px 0 var(--ink);
  cursor: pointer;
  transition: transform 0.1s, box-shadow 0.1s;
}
.btn:active { transform: translateY(3px); box-shadow: 0 1px 0 var(--ink); }
.btn:disabled { opacity: 0.6; }

.phone {
  margin: 36px auto 0;
  width: 250px;
  padding: 14px 14px 20px;
  border: 2px solid var(--ink);
  border-radius: 30px;
  background: #fff;
  box-shadow: 8px 8px 0 var(--yellow);
}
.notch { width: 70px; height: 6px; margin: 0 auto 16px; border-radius: 3px; background: var(--ink); }
.word { font-size: 26px; font-weight: 700; }
.ipa { color: var(--brown); font-size: 13px; }
.mean { margin: 10px 0; font-size: 14px; }
.eg { padding: 10px 12px; border-radius: 10px; background: var(--cream); font-size: 13px; color: var(--brown); }
.eg b { color: var(--orange); font-weight: 600; }
.dots { display: flex; gap: 6px; margin-top: 14px; }
.dots i { flex: 1; height: 6px; border-radius: 3px; background: #eee3c4; }
.dots .on { background: var(--orange); }

.feature {
  display: flex;
  gap: 14px;
  padding: 16px;
  margin-bottom: 12px;
  border: 2px solid var(--ink);
  border-radius: 16px;
  background: #fff;
}
.feature img { flex: none; width: 44px; height: 44px; }
.feature h3 { margin: 0 0 2px; font-size: 16px; }
.feature p { margin: 0; color: var(--brown); font-size: 14px; }

form { display: grid; gap: 12px; }
input {
  padding: 14px;
  border: 2px solid var(--ink);
  border-radius: 14px;
  background: #fff;
  color: var(--ink);
  font-size: 16px;
}
input:focus { outline: 3px solid var(--yellow); }
.done { padding: 18px; border: 2px solid var(--ink); border-radius: 16px; background: #fff; text-align: center; }

.sticky {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 12px 22px calc(14px + env(safe-area-inset-bottom));
  background: linear-gradient(transparent, var(--cream) 30%);
}
.sticky .btn { max-width: 516px; margin: 0 auto; }

footer { margin-top: 40px; color: var(--brown); font-size: 12px; text-align: center; }

@keyframes bob {
  50% { transform: translateY(-8px) rotate(-3deg); }
}
@media (prefers-reduced-motion: reduce) {
  .chick { animation: none; }
}