:root {
  color: #493c2c;
  background: #f6f1e7;
  font-family: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { min-height: 100%; background: #f6f1e7; scroll-behavior: smooth; }
body { min-width: 320px; margin: 0; background: #f6f1e7; }
button { font: inherit; cursor: pointer; -webkit-tap-highlight-color: transparent; }
h1, h2, h3, p { margin: 0; }

.page-shell {
  width: min(100%, 430px);
  min-height: 100vh;
  margin: 0 auto;
  overflow: hidden;
  background: #fffaf0;
  box-shadow: 0 0 40px rgba(93, 70, 35, .09);
}

.hero {
  position: relative;
  min-height: 424px;
  padding: 28px 24px 45px;
  overflow: hidden;
  border-bottom: 1px solid #eee4d1;
  background: linear-gradient(145deg, #fffdf8, #fff5db);
}

.brand { color: #8b6d3e; font-size: 13px; font-weight: 800; letter-spacing: .08em; }
.eyebrow { color: #b27a24; font-size: 13px; font-weight: 800; letter-spacing: .08em; }
.hero .eyebrow { position: relative; z-index: 1; margin-top: 122px; }
h1 { position: relative; z-index: 1; margin-top: 12px; font-size: 39px; line-height: 1.17; letter-spacing: -2px; }
h1 em { color: #e96234; font-style: normal; }
h1 span { font-size: 31px; }
.hero-copy { position: relative; z-index: 1; margin-top: 17px; color: #846844; font-size: 15px; font-weight: 700; line-height: 1.6; }

.hero-cta {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  min-height: 55px;
  margin-top: 29px;
  border: 0;
  border-radius: 14px;
  color: #fffdf4;
  background: linear-gradient(110deg, #ed7d3b, #eb5f37);
  box-shadow: 0 8px 15px rgba(210, 104, 49, .18);
  font-weight: 900;
}
.hero-cta span { font-size: 20px; }
.otter-sticker {
  position: absolute;
  background-image: url("assets/otter-decoration.png");
  background-repeat: no-repeat;
  background-size: contain;
  background-position: center bottom;
  mix-blend-mode: multiply;
}
.otter-sticker--hero { top: 15px; right: -24px; width: 290px; height: 112px; opacity: .4; }
.otter-sticker--qr { top: 10px; right: -21px; width: 145px; height: 68px; opacity: .3; }

.steps { padding: 35px 16px 4px; }
.section-heading { padding: 0 5px; }
.section-heading p { color: #c28a2f; font-size: 12px; font-weight: 900; letter-spacing: .12em; }
.section-heading h2, .join-card h2 { margin-top: 5px; font-size: 25px; letter-spacing: -1px; }
.steps ol { display: grid; gap: 11px; margin: 18px 0 0; padding: 0; list-style: none; }
.steps li { display: flex; gap: 14px; align-items: flex-start; padding: 17px 15px; border: 1px solid #efe7da; border-radius: 16px; background: #fffdfa; box-shadow: 0 6px 12px rgba(111, 85, 45, .05); }
.step-index { display: grid; flex: 0 0 36px; width: 36px; height: 36px; place-items: center; border-radius: 12px; color: #ed6b39; background: #fff0c2; font-size: 12px; font-weight: 900; }
.steps li:nth-child(2) .step-index { color: #a87422; background: #ffe5a2; }
.steps li:nth-child(3) .step-index { color: #fffdf5; background: #ed8a4e; }
.steps h3 { font-size: 16px; line-height: 1.5; }
.steps li p { margin-top: 4px; color: #8b7356; font-size: 13px; line-height: 1.55; }

.join-card { position: relative; margin: 35px 16px 0; padding: 31px 22px 25px; overflow: hidden; border: 1px solid #eee2ca; border-radius: 20px; background: #fff9e9; text-align: center; }
.join-card h2 { position: relative; z-index: 1; margin-top: 0; }
.qr-frame { width: min(100%, 267px); margin: 21px auto 13px; padding: 9px; border: 1px solid rgba(118, 84, 31, .12); border-radius: 16px; background: #fffdf8; box-shadow: 0 8px 16px rgba(135, 95, 28, .1); }
.qr-frame img { display: block; width: 100%; height: auto; border-radius: 10px; }
.scan-tip { color: #a17943; font-size: 12px; font-weight: 700; }
.scan-tip span { margin-right: 3px; color: #e16d38; font-size: 16px; }
footer { padding: 27px 20px calc(32px + env(safe-area-inset-bottom)); color: #a48b64; font-size: 11px; text-align: center; }

@media (min-width: 431px) {
  body { padding: 20px 0; }
  .page-shell { border-radius: 30px; }
}