:root {
  --bg: #12141A;
  --surface: #1C1F27;
  --surface2: #242834;
  --line: #2E3341;
  --ink: #EDEFF3;
  --sub: #9AA3B5;
  --red: #FF5A3C;
  --yellow: #FFC93C;
  --green: #3DDC97;
  --blue: #5B9BFF;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Zen Kaku Gothic New', 'Hiragino Sans', 'Yu Gothic', sans-serif;
  line-height: 1.9;
  font-size: 15px;
}
header.site {
  background: linear-gradient(180deg, #1C1F27, #16181F);
  border-bottom: 1px solid var(--line);
  padding: 16px;
}
.header-inner {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 10px;
}
.header-bar { width: 8px; height: 30px; background: var(--red); border-radius: 3px; }
.site-name { font-size: 17px; font-weight: 900; letter-spacing: 2px; margin: 0; }
.site-name a { color: var(--ink); text-decoration: none; }
.site-sub { margin: 0; font-size: 10px; color: var(--sub); letter-spacing: 3px; }
main { max-width: 720px; margin: 0 auto; padding: 24px 16px 48px; }
h1 { font-size: 22px; font-weight: 900; letter-spacing: 1px; margin: 8px 0 4px; line-height: 1.5; }
.meta { color: var(--sub); font-size: 12px; margin: 0 0 20px; }
section {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 18px 20px;
  margin-bottom: 14px;
}
h2 {
  font-size: 16px;
  font-weight: 800;
  margin: 0 0 10px;
  padding-left: 10px;
  border-left: 4px solid var(--red);
}
h3 { font-size: 14.5px; font-weight: 800; margin: 16px 0 6px; color: var(--yellow); }
p { margin: 0 0 10px; }
p:last-child { margin-bottom: 0; }
ul, ol { margin: 0 0 10px; padding-left: 22px; }
li { margin-bottom: 4px; }
a { color: var(--blue); word-break: break-all; }
strong { color: var(--ink); }
.note { font-size: 13px; color: var(--sub); }
table { width: 100%; border-collapse: collapse; font-size: 13px; margin: 10px 0; }
th, td { border: 1px solid var(--line); padding: 7px 9px; text-align: center; }
th { background: var(--surface2); font-weight: 800; }
.callout {
  background: var(--surface2);
  border-left: 4px solid var(--yellow);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 13.5px;
  margin: 10px 0;
}
.back {
  display: inline-block;
  margin-top: 20px;
  padding: 12px 24px;
  background: linear-gradient(135deg, #FF5A3C, #E03418);
  color: #fff;
  font-weight: 800;
  border-radius: 12px;
  text-decoration: none;
  letter-spacing: 1px;
}
.article-card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 16px 20px;
  margin-bottom: 12px;
  text-decoration: none;
  color: var(--ink);
}
.article-card:hover { border-color: var(--red); }
.article-card h2 { border: none; padding: 0; margin: 0 0 4px; color: var(--ink); }
.article-card p { color: var(--sub); font-size: 13px; margin: 0; }
.tag {
  display: inline-block;
  background: var(--surface2);
  border: 1px solid var(--line);
  color: var(--yellow);
  font-size: 11px;
  font-weight: 800;
  border-radius: 999px;
  padding: 2px 10px;
  margin-bottom: 6px;
}
footer.site {
  border-top: 1px solid var(--line);
  padding: 20px 16px 28px;
  text-align: center;
  color: var(--sub);
  font-size: 12px;
}
footer.site a { color: var(--sub); margin: 0 6px; }
footer.site .copy { margin-top: 8px; }