:root {
  --bg: #05070d;
  --text: #e8ecf4;
  --muted: #8a93a6;
  --line: #1c2232;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family:
    -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  line-height: 1.6;
}

.hero {
  max-width: 720px;
  margin: 0 auto;
  padding: 96px 16px 64px;
  text-align: center;
}

.hero h1 {
  margin: 0 0 16px;
  font-size: 40px;
  font-weight: 300;
  letter-spacing: 0.3em;
  text-indent: 0.3em;
}

.tagline {
  margin: 0 0 40px;
  color: var(--muted);
  font-size: 17px;
  letter-spacing: 0.05em;
  text-wrap: balance;
}

.login {
  display: inline-block;
  padding: 10px 36px;
  border: 1px solid var(--muted);
  border-radius: 999px;
  color: var(--text);
  text-decoration: none;
  letter-spacing: 0.2em;
  text-indent: 0.2em;
}

.login:hover {
  border-color: var(--text);
}

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 420px), 1fr));
  gap: 24px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px;
}

figure {
  margin: 0;
}

figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 4px;
}

figcaption {
  margin-top: 8px;
  color: var(--muted);
  font-size: 13px;
}

footer {
  margin-top: 80px;
  padding: 24px 16px 32px;
  border-top: 1px solid var(--line);
  text-align: center;
  font-size: 12px;
}

footer a {
  color: var(--muted);
  text-decoration: none;
}

footer a:hover {
  color: var(--text);
}

@media (max-width: 480px) {
  .hero {
    padding: 64px 16px 48px;
  }

  .hero h1 {
    font-size: 32px;
  }

  .tagline {
    font-size: 15px;
  }
}

footer .sep {
  margin: 0 8px;
  color: var(--line);
}

/* 协议页面 */
.doc {
  max-width: 760px;
  margin: 0 auto;
  padding: 32px 16px 0;
  font-size: 15px;
  line-height: 1.8;
}

.doc a {
  color: var(--text);
}

.doc h1 {
  margin: 8px 0 4px;
  font-size: 28px;
  font-weight: 400;
}

.doc h2 {
  margin: 32px 0 8px;
  font-size: 19px;
  font-weight: 500;
}

.doc h3 {
  margin: 20px 0 4px;
  font-size: 16px;
  font-weight: 500;
}

.doc ul {
  padding-left: 1.4em;
}

.doc li {
  margin: 4px 0;
}

.doc .back a,
.doc .meta {
  color: var(--muted);
  font-size: 13px;
  text-decoration: none;
}

.doc .draft {
  padding: 8px 12px;
  border: 1px solid #6b5a2a;
  border-radius: 4px;
  color: #e6c86e;
  font-size: 14px;
}

.doc table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.doc th,
.doc td {
  padding: 8px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}