:root {
  --bg-top: #081226;
  --bg-bottom: #101f3f;
  --card: rgba(8, 18, 38, 0.72);
  --card-border: rgba(150, 205, 255, 0.22);
  --text-main: #f2f7ff;
  --text-sub: #b7c8eb;
  --accent: #89d3ff;
  --accent-strong: #f4f8ff;
  --button-start: #dff3ff;
  --button-end: #7ec9ff;
  --button-text: #08203d;
  --shadow: 0 24px 60px rgba(3, 11, 26, 0.42);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text-main);
  background:
    radial-gradient(circle at top right, rgba(116, 190, 255, 0.26), transparent 28%),
    linear-gradient(180deg, var(--bg-top) 0%, var(--bg-bottom) 100%);
}

.page-shell {
  width: min(100%, 760px);
  margin: 0 auto;
  padding: 20px 16px 40px;
}

.hero-card,
.claim-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 28px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.hero-card {
  overflow: hidden;
}

.hero-banner {
  display: block;
  width: 100%;
  aspect-ratio: 5 / 2;
  object-fit: cover;
}

.hero-copy {
  padding: 22px 22px 26px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 13px;
  letter-spacing: 0.18em;
}

h1 {
  margin: 0;
  font-size: 30px;
  line-height: 1.15;
}

.description {
  margin: 14px 0 0;
  color: var(--text-sub);
  font-size: 15px;
  line-height: 1.75;
}

.claim-card {
  margin-top: 18px;
  padding: 26px 20px;
  text-align: center;
}

.claim-button,
.copy-button {
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 700;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.claim-button {
  width: 100%;
  padding: 18px 20px;
  background: linear-gradient(135deg, var(--button-start), var(--button-end));
  color: var(--button-text);
  font-size: 20px;
  box-shadow: 0 16px 36px rgba(97, 195, 255, 0.28);
}

.claim-button:disabled {
  opacity: 0.72;
  cursor: wait;
}

.claim-button:not(:disabled):hover,
.copy-button:hover {
  transform: translateY(-1px);
}

.hint-text {
  margin: 14px 0 0;
  color: var(--text-sub);
  font-size: 13px;
}

.result-card {
  margin-top: 22px;
  padding: 22px 18px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.status-title {
  margin: 0;
  font-size: 22px;
  font-weight: 700;
}

.status-subtitle {
  margin: 12px 0 0;
  color: var(--text-sub);
  font-size: 14px;
  line-height: 1.7;
}

.code-value {
  margin: 18px 0 0;
  font-size: 42px;
  font-weight: 800;
  letter-spacing: 0.16em;
  color: var(--accent-strong);
}

.copy-button {
  margin-top: 18px;
  padding: 13px 28px;
  background: rgba(137, 211, 255, 0.16);
  color: var(--text-main);
  font-size: 16px;
  border: 1px solid rgba(137, 211, 255, 0.28);
}

.hidden {
  display: none;
}

@media (max-width: 640px) {
  .page-shell {
    padding: 14px 12px 28px;
  }

  .hero-copy {
    padding: 18px 18px 22px;
  }

  h1 {
    font-size: 24px;
  }

  .claim-card {
    padding: 22px 16px;
  }

  .claim-button {
    padding: 16px 18px;
    font-size: 18px;
  }

  .status-title {
    font-size: 20px;
  }

  .code-value {
    font-size: 34px;
  }
}