:root {
  --ink: #1c1917;
  --muted: #57534e;
  --line: #e7e5e4;
  --bg: #fafaf9;
  --accent: #9a3412;
}
* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.7 "Source Han Serif SC", "Noto Serif SC", "Songti SC", "SimSun", serif;
}
.wrap {
  max-width: 820px;
  margin: 0 auto;
  padding: 32px 20px 64px;
}
.brand {
  font-family: "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--accent);
  font-weight: 700;
}
h1 {
  font-size: 28px;
  line-height: 1.3;
  margin: 8px 0 12px;
}
.meta {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 28px;
}
h2 {
  font-size: 18px;
  margin: 28px 0 10px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
}
p, li { margin: 0 0 10px; }
ol, ul { padding-left: 1.4em; }
.notice {
  background: #fff7ed;
  border: 1px solid #fed7aa;
  border-radius: 10px;
  padding: 12px 14px;
  font-size: 14px;
  color: #7c2d12;
  margin: 16px 0 24px;
}
.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 18px;
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 14px;
  margin-bottom: 24px;
}
.nav a { color: var(--accent); }
.form label {
  display: block;
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 14px;
  font-weight: 600;
  margin: 14px 0 6px;
}
.form input, .form select, .form textarea {
  width: 100%;
  font: 15px/1.5 "Microsoft YaHei", sans-serif;
  padding: 10px 12px;
  border: 1px solid #d6d3d1;
  border-radius: 8px;
  background: #fff;
}
.form textarea { min-height: 140px; resize: vertical; }
.form button {
  margin-top: 18px;
  background: var(--accent);
  color: #fff;
  border: 0;
  border-radius: 8px;
  padding: 10px 20px;
  font-size: 15px;
  cursor: pointer;
}
.ok {
  display: none;
  margin-top: 16px;
  padding: 12px;
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  color: #065f46;
  border-radius: 8px;
}
footer {
  margin-top: 40px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
  font-family: "Microsoft YaHei", sans-serif;
}