@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500&family=Noto+Serif+SC:wght@500;600&display=swap");

:root {
  --paper: #f7f2e8;
  --ink: #2c261f;
  --muted: #6f6456;
  --leaf: #3d6b45;
  --line: rgba(62, 54, 40, 0.12);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(42rem 28rem at 100% -8%, rgba(123, 181, 206, 0.45), transparent 70%),
    radial-gradient(36rem 24rem at -10% 108%, rgba(255, 192, 0, 0.28), transparent 68%),
    var(--paper);
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 1.05rem;
  line-height: 1.85;
}

.bar {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.6rem 1.2rem;
  max-width: 40rem;
  margin: 0 auto;
  padding: 1.1rem 1.4rem 0.8rem;
  background: linear-gradient(180deg, rgba(247, 242, 232, 0.94), rgba(247, 242, 232, 0.88) 70%, transparent);
}

.mark,
nav a {
  color: var(--muted);
  font-size: 0.92rem;
  text-decoration: none;
}

.mark { color: var(--ink); }

nav { display: flex; flex-wrap: wrap; gap: 0.15rem 0.9rem; }

nav a:hover { color: var(--ink); }

main {
  max-width: 40rem;
  margin: 0 auto;
  padding: 2.2rem 1.4rem 1rem;
}

.intro {
  margin: 0 0 1rem;
  font-family: "Noto Serif SC", "Songti SC", serif;
  font-size: 1.85rem;
  font-weight: 500;
  line-height: 1.45;
}

main p { margin: 0 0 0.9rem; }

section { margin-top: 3.2rem; }

h2 {
  margin: 0 0 0.7rem;
  color: var(--leaf);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.14em;
}

.when {
  margin-bottom: 0.3rem;
  color: var(--muted);
  font-size: 0.92rem;
}

footer {
  max-width: 40rem;
  margin: 0 auto;
  padding: 2.4rem 1.4rem 3rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
}

@media (max-width: 640px) {
  .intro { font-size: 1.5rem; }
  .bar { position: static; background: transparent; }
}