:root {
  --bg: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --line: #e5e7eb;
  --soft: #f8fafc;
  --brand: #0f172a;
  --accent: #2563eb;
  --accent2: #06b6d4;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "游ゴシック Medium", Yu Gothic Medium, "游ゴシック", YuGothic, "ヒラギノ角ゴ ProN W3", "Hiragino Kaku Gothic ProN", "メイリオ", Meiryo, Verdana, sans-serif;
  line-height: 1.6;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* ====== Layout ====== */
.wrap {
  max-width: 980px;
  margin: 0 auto;
  padding: 40px 20px 72px;
}
@media (min-width: 900px) {
  .wrap { padding-top: 80px; }
}

h1 {
  margin: 0 0 14px;
  font-size: clamp(22px, 3.4vw, 34px);
  line-height: 1.4;
  letter-spacing: .01em;
  font-weight: 800;
  color: var(--brand);
}
@media (min-width: 900px) {
  h1 { margin-bottom: 38px; }
}

.section { margin-top: 28px; }

.h2 {
  margin: 0 0 12px;
  font-size: 20px;
  font-weight: 700;
  color: var(--brand);
  line-height: 1.4;
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.h2 span {
  display: inline-block;
  padding-bottom: 8px;
  position: relative;
}
.h2 span::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: min(260px, 100%);
  height: 3px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), rgba(6, 182, 212, .65), transparent);
  opacity: .95;
}

.text {
  font-size: 16px;
  line-height: 1.6;
  margin: 0 0 10px;
}
.text + .text { margin-top: 10px; }

ul {
  margin: 10px 0 0;
  padding-left: 1.2em;
}
li { margin: 8px 0; }

.sign {
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--brand);
  font-weight: 700;
}
.sign .org { margin-right: 1em; }