:root {
  --paper: #f3efe6;
  --ink: #1b1a17;
  --muted: #6b675f;
  --bronze: #8a6a3c;
  --grid: rgba(138, 106, 60, 0.10);
}

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

html, body {
  height: 100%;
  margin: 0;
}

body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 28px 28px;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  -webkit-font-smoothing: antialiased;
}

.frame {
  width: min(640px, calc(100% - 48px));
  min-height: min(72vh, 640px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 64px 48px 40px;
  border: 1px solid rgba(27, 26, 23, 0.12);
  background: rgba(243, 239, 230, 0.92);
  box-shadow: 0 20px 60px rgba(27, 26, 23, 0.06);
}

.eyebrow {
  margin: 0 0 18px;
  font-size: 0.75rem;
  letter-spacing: 0.35em;
  color: var(--muted);
}

h1 {
  margin: 0 0 28px;
  font-family: "Songti SC", "STSong", "SimSun", "NSimSun", "PMingLiU", "Noto Serif CJK SC", serif;
  font-size: clamp(2.4rem, 8vw, 4.4rem);
  font-weight: 600;
  letter-spacing: 0.22em;
  line-height: 1.15;
}

.rule {
  width: 48px;
  height: 1px;
  margin: 0 0 28px;
  border: 0;
  background: var(--bronze);
}

.lead {
  margin: 0 0 10px;
  font-size: 1.05rem;
  line-height: 1.7;
}

.note {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

footer {
  margin-top: auto;
  padding-top: 48px;
  color: var(--muted);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
}

footer p { margin: 0; }

@media (max-width: 600px) {
  .frame {
    width: calc(100% - 32px);
    min-height: 70vh;
    padding: 48px 24px 32px;
  }
  h1 { letter-spacing: 0.14em; }
}