:root {
  color-scheme: light;
  --bg: #0c1221;
  --card: #151d31;
  --text: #eff4ff;
  --sub: #b8c3da;
  --accent: #4f88ff;
  --sale: #ff4f6d;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: radial-gradient(circle at top, #1b2949, var(--bg));
  color: var(--text);
  min-height: 100vh;
}

.container {
  width: min(980px, 92vw);
  margin: 0 auto;
  padding: 2rem 0 3rem;
}

.hero {
  text-align: center;
  margin-bottom: 2rem;
}

.tag {
  display: inline-block;
  margin: 0;
  padding: 0.4rem 0.8rem;
  border-radius: 999px;
  background: rgba(255, 79, 109, 0.2);
  color: #ffd7de;
  border: 1px solid rgba(255, 79, 109, 0.5);
  font-weight: 700;
  letter-spacing: 0.05em;
}

h1 {
  margin: 1rem 0 0.25rem;
}

.subtitle {
  margin: 0;
  color: var(--sub);
}

.plans {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
}

.card {
  background: linear-gradient(160deg, #1a2440, var(--card));
  border: 1px solid rgba(140, 160, 203, 0.2);
  border-radius: 16px;
  padding: 1rem;
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.25);
}

.plan-name {
  margin: 0 0 0.6rem;
}

.sale-badge {
  display: inline-block;
  margin: 0 0 0.8rem;
  padding: 0.25rem 0.6rem;
  border-radius: 8px;
  font-weight: 700;
  background: rgba(255, 79, 109, 0.2);
  color: #ffd7de;
}

.price-row {
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
  margin: 0 0 1rem;
}

.price-discount {
  font-size: 1.6rem;
  font-weight: 700;
  color: #ffffff;
}

.price-original {
  color: var(--sub);
  text-decoration: line-through;
}

.buy-btn,
.btn {
  border: none;
  cursor: pointer;
  display: inline-block;
  text-align: center;
  width: 100%;
  background: linear-gradient(120deg, #4f88ff, #78a3ff);
  color: white;
  padding: 0.65rem 1rem;
  border-radius: 10px;
  font-weight: 700;
}

.note {
  margin-top: 1rem;
  color: var(--sub);
  text-align: center;
  font-size: 0.92rem;
}

.purchase-result {
  margin: 1rem 0 0;
  text-align: center;
  min-height: 1.5rem;
  color: #9fe6b8;
  font-weight: 700;
}

.payment-dialog {
  border: 1px solid rgba(140, 160, 203, 0.3);
  border-radius: 12px;
  background: #0f1730;
  color: var(--text);
  width: min(420px, 92vw);
}

.payment-dialog::backdrop {
  background: rgba(0, 0, 0, 0.55);
}

#paymentForm {
  padding: 1.1rem;
}

.payment-options {
  display: grid;
  gap: 0.6rem;
  margin: 0.8rem 0 1rem;
}

.payment-options label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.dialog-actions {
  display: flex;
  gap: 0.6rem;
}

.dialog-actions .btn {
  width: 50%;
}

.btn.ghost {
  background: transparent;
  border: 1px solid rgba(140, 160, 203, 0.5);
  color: var(--text);
}