@charset "utf-8";

:root {
  --vessel-red: #c91524;
  --text: #282828;
  --muted: #eef2f6;
  --line: #d5d5d5;
  --link: #197acc;
}

*, *::before, *::after { box-sizing: border-box; }
body {
  margin: 0;
  color: var(--text);
  background: #fff;
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  font-size: 16px;
  line-height: 1.7;
}
img { max-width: 100%; height: auto; vertical-align: bottom; }
a { color: var(--link); }

/* 共通ヘッダー */
.site-header { max-width: 100%; margin: 0; padding: 20px 35px; }
.site-logo { display: inline-block; }
.site-logo img { width: 140px; }

/* 共通パンくず */
.breadcrumb {
  width: 96%;
  max-width: 1100px;
  margin: 25px auto 35px;
  color: #000;
  font-size: 14px;
  font-weight: 400;
  line-height: 1.7;
}
.breadcrumb a { color: inherit; text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb span { margin: 0 7px; }

/* 共通タイトル帯・2カラム */
.brand-hero { width: 96%; max-width: 1000px; margin: 0 auto 60px; }
.brand-hero img { display: block; width: 100%; }
.page-layout {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  width: 96%;
  max-width: 1000px;
  margin: 0 auto;
  font-weight: 600;
}
.main-column { width: 62%; min-width: 0; }
.side-column { width: 30%; }

/* 共通右サイドバー */
.side-promotion { margin: 26px 0 62px; }
.side-banner { display: block; transition: opacity .2s ease; }
.side-banner:hover { opacity: .85; }
.side-cta {
  display: block;
  margin-top: 12px;
  padding: 13px 16px;
  border-radius: 6px;
  background: var(--vessel-red);
  box-shadow: 0 2px 5px rgba(0, 0, 0, .18);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  text-align: center;
  text-decoration: none;
  transition: opacity .2s ease;
}
.side-cta:hover { opacity: .85; }
.side-nav h2 {
  margin: 0 0 10px;
  padding: 0 0 18px;
  border-bottom: 2px solid var(--vessel-red);
  font-size: 20px;
  font-weight: 700;
}
.side-nav ul { margin: 0; padding: 0; list-style: none; }
.side-nav li { border-bottom: 1px solid var(--line); }
.side-nav a {
  display: block;
  padding: 18px 0;
  color: var(--link);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
}
.side-nav a:hover { text-decoration: underline; }
.side-nav a.is-current { color: var(--vessel-red); font-weight: 700; }

/* 共通フッター */
.site-footer {
  margin-top: 80px;
  padding: 20px;
  background: #c4c4c4;
  color: #4c4c4c;
  font-size: 11px;
  text-align: center;
}

@media (max-width: 768px) {
  body { font-size: 14px; line-height: 1.5; }
  .site-header { padding: 10px 15px; }
  .site-logo img { width: 100px; }
  .breadcrumb {
    width: calc(100% - 30px);
    margin: 18px auto 25px;
    font-size: 11px;
    line-height: 1.6;
  }
  .breadcrumb span { margin: 0 5px; }
  .brand-hero { width: calc(100% - 30px); margin-bottom: 30px; }
  .page-layout { display: block; width: calc(100% - 30px); }
  .main-column, .side-column { width: 100%; }
  .side-column { margin-top: 40px; }
  .side-promotion { margin: 0 0 40px; }
  .side-nav h2 { font-size: 18px; }
  .side-nav a { padding: 18px 0; font-size: 14px; }
  .site-footer { margin-top: 50px; }
}

@media print {
  .side-column, .site-footer { display: none; }
  .main-column { width: 100%; }
  .page-layout { width: 100%; }
}