/* 全局重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 55%, #334155 100%);
  color: #e2e8f0;
}

/* 卡片容器 */
.card {
  width: 100%;
  max-width: 760px;
  padding: 48px 40px 32px;
  text-align: center;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(12px);
}

/* 主标题 */
.title {
  font-size: clamp(20px, 3.2vw, 34px);
  line-height: 1.5;
  font-weight: 700;
  letter-spacing: 0.5px;
  background: linear-gradient(90deg, #67e8f9, #a78bfa, #f472b6);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  word-break: break-word;
  text-wrap: balance;
}

/* 时间区域 */
.clock {
  margin-top: 36px;
  padding: 24px 16px;
  border-radius: 14px;
  background: rgba(15, 23, 42, 0.55);
  border: 1px solid rgba(148, 163, 184, 0.25);
}

.clock-label {
  font-size: 14px;
  letter-spacing: 2px;
  color: #94a3b8;
}

.clock-value {
  margin-top: 10px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: clamp(22px, 4vw, 38px);
  font-weight: 700;
  color: #38bdf8;
  font-variant-numeric: tabular-nums;
  letter-spacing: 1px;
}

.clock-meta {
  margin-top: 12px;
  font-size: 13px;
  color: #94a3b8;
}

.dot {
  margin: 0 8px;
  color: #475569;
}

/* 页脚 */
.footer {
  margin-top: 32px;
  font-size: 13px;
  color: #64748b;
}

/* 小屏适配 */
@media (max-width: 480px) {
  .card {
    padding: 32px 20px 24px;
    border-radius: 16px;
  }

  .clock {
    margin-top: 24px;
    padding: 18px 12px;
  }
}