:root {
  --ink: #102033;
  --muted: #5c6b7a;
  --paper: #f3f6fb;
  --line: rgba(16, 32, 51, 0.08);
  --cyan-deep: #0077c8;
  --gold: #f0b000;
  --shadow: 0 24px 60px rgba(16, 32, 51, 0.08);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(900px 420px at 85% -10%, rgba(0, 170, 239, 0.16), transparent 60%),
    radial-gradient(700px 380px at -10% 20%, rgba(240, 176, 0, 0.14), transparent 55%),
    var(--paper);
  font-family: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.7;
}
img { max-width: 100%; display: block; }
a { color: var(--cyan-deep); }
.wrap { width: min(860px, calc(100% - 40px)); margin: 0 auto; }

header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(16px);
  background: rgba(243, 246, 251, 0.82);
}
.nav {
  display: flex;
  align-items: center;
  min-height: 72px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: -0.03em;
}
.brand img {
  width: 36px;
  height: 36px;
  border-radius: 10px;
}

.doc {
  margin: 28px auto 48px;
  background: white;
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: var(--shadow);
  padding: 36px 32px 28px;
}
h1 {
  margin: 0 0 8px;
  font-size: clamp(32px, 4vw, 44px);
  line-height: 1.12;
  letter-spacing: -0.04em;
}
.updated { margin: 0 0 18px; color: var(--muted); font-size: 14px; }
h2 {
  margin: 28px 0 8px;
  font-size: 22px;
  letter-spacing: -0.03em;
}
p { margin: 0 0 12px; }
ul { margin: 0 0 12px; padding-left: 1.2rem; }
li + li { margin-top: 6px; }
.notice {
  background: rgba(255, 204, 0, 0.24);
  border-radius: 18px;
  padding: 16px 18px;
  margin: 0 0 18px;
}
table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0 4px;
  font-size: 14px;
}
th, td {
  border-bottom: 1px solid var(--line);
  padding: 10px 8px;
  text-align: left;
  vertical-align: top;
}
th { color: var(--muted); font-weight: 650; }
.table-wrap { overflow-x: auto; }

footer {
  padding: 8px 0 40px;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 14px;
}
footer nav { display: flex; gap: 16px; flex-wrap: wrap; }
footer a { color: inherit; text-decoration: none; }
footer a:hover { color: var(--ink); }

@media (max-width: 640px) {
  .doc { padding: 24px 18px; border-radius: 22px; }
}