*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #0f1419;
  --surface: rgba(255, 255, 255, 0.04);
  --border: rgba(255, 255, 255, 0.08);
  --text: #e8eaed;
  --text-muted: #9aa0a6;
  --accent: #5b8def;
  --accent-hover: #7aa3f5;
  --glow: rgba(91, 141, 239, 0.35);
  --font: "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

html,
body {
  height: 100%;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* 背景装饰 */
.bg-shape {
  position: fixed;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
}

.bg-shape--1 {
  width: 420px;
  height: 420px;
  top: -120px;
  right: -80px;
  background: radial-gradient(circle, var(--glow) 0%, transparent 70%);
}

.bg-shape--2 {
  width: 320px;
  height: 320px;
  bottom: -60px;
  left: -60px;
  background: radial-gradient(circle, rgba(120, 80, 220, 0.2) 0%, transparent 70%);
}

.page {
  position: relative;
  z-index: 1;
  min-height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem 1.5rem 3rem;
  text-align: center;
}

.code {
  font-size: clamp(7rem, 22vw, 12rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.04em;
  background: linear-gradient(135deg, #fff 0%, var(--accent) 55%, #7b6cf0 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  user-select: none;
  margin-bottom: 0.5rem;
  text-shadow: 0 0 80px var(--glow);
}

.content {
  max-width: 28rem;
}

.content h1 {
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 2rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 8.5rem;
  padding: 0.65rem 1.35rem;
  font-size: 0.9rem;
  font-family: inherit;
  font-weight: 500;
  border-radius: 10px;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s, color 0.2s, border-color 0.2s, transform 0.15s;
}

.btn:active {
  transform: scale(0.98);
}

.btn--primary {
  background: var(--accent);
  color: #fff;
  border: 1px solid transparent;
}

.btn--primary:hover {
  background: var(--accent-hover);
}

.btn--ghost {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn--ghost:hover {
  border-color: rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.07);
}

.footer {
  position: absolute;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.footer__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #e74c3c;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.4;
  }
}

@media (max-width: 480px) {
  .actions {
    flex-direction: column;
    width: 100%;
    max-width: 16rem;
  }

  .btn {
    width: 100%;
  }

  .footer {
    position: static;
    transform: none;
    margin-top: 3rem;
  }
}