:root {
  --bg: #eef2f1;
  --surface: #fffdf8;
  --ink: #292821;
  --muted: #756f63;
  --line: #e5dccb;
  --sage: #4d6e57;
  --sage-soft: #dfe8dd;
  --amber: #c99a5a;
  --night: #253045;
  --shadow: 0 20px 50px rgba(65, 53, 36, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 18px 18px, rgba(255, 255, 255, 0.86) 0 1px, transparent 1.5px),
    linear-gradient(180deg, var(--bg) 0%, #f4efe6 48%, #fff8ec 100%);
  background-size: 72px 72px, auto;
}

.join-page {
  width: min(960px, calc(100% - 32px));
  min-height: 100vh;
  margin: 0 auto;
  padding: 34px 0 28px;
  display: grid;
  align-content: center;
  gap: 20px;
}

.intro {
  text-align: center;
}

.logo {
  width: 72px;
  height: 72px;
  padding: 5px;
  border-radius: 8px;
  object-fit: contain;
  background: var(--surface);
  box-shadow: 0 12px 28px rgba(65, 53, 36, 0.1);
}

.eyebrow {
  margin: 18px 0 8px;
  color: var(--sage);
  font-size: 14px;
  font-weight: 700;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 12px;
  font-size: clamp(32px, 6vw, 58px);
  line-height: 1.08;
  letter-spacing: 0;
}

.lead {
  width: min(620px, 100%);
  margin: 0 auto;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.75;
}

.qr-panel {
  display: grid;
  grid-template-columns: minmax(260px, 380px) minmax(0, 1fr);
  gap: 28px;
  align-items: center;
  padding: 28px;
  border: 1px solid rgba(229, 220, 203, 0.88);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(255, 253, 248, 0.97), rgba(247, 238, 221, 0.92)),
    linear-gradient(90deg, rgba(125, 153, 124, 0.14), rgba(201, 154, 90, 0.12));
  box-shadow: var(--shadow);
}

.qr-frame {
  padding: 16px;
  border-radius: 8px;
  background: #ffffff;
  border: 1px solid var(--line);
}

.qr-frame img {
  display: block;
  width: 100%;
  aspect-ratio: 1;
  object-fit: contain;
}

.scan-copy h2 {
  margin-bottom: 12px;
  font-size: 32px;
  line-height: 1.18;
}

.scan-copy p {
  margin: 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.7;
}

.details {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.details div {
  min-height: 148px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 253, 248, 0.86);
}

.details span {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  margin-bottom: 14px;
  border-radius: 50%;
  color: var(--night);
  background: var(--sage-soft);
  font-size: 13px;
  font-weight: 800;
}

.details strong {
  display: block;
  margin-bottom: 8px;
  font-size: 18px;
}

.details p,
.notice {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.65;
}

.notice {
  padding: 0 8px;
  text-align: center;
  font-size: 14px;
}

@media (max-width: 760px) {
  .join-page {
    width: min(100% - 24px, 520px);
    align-content: start;
    padding-top: 22px;
  }

  .lead,
  .scan-copy p {
    font-size: 16px;
  }

  .qr-panel {
    grid-template-columns: 1fr;
    gap: 18px;
    padding: 18px;
    text-align: center;
  }

  .qr-frame {
    width: min(100%, 360px);
    margin: 0 auto;
  }

  .scan-copy h2 {
    font-size: 26px;
  }

  .details {
    grid-template-columns: 1fr;
  }

  .details div {
    min-height: auto;
  }
}