/* ==========================================================================
   SRKコンサルティング Webサイト 共通スタイル
   ========================================================================== */

:root {
  --color-bg: #E9E4DE;       /* ベース(グレージュ) */
  --color-bg-alt: #DED7CD;   /* ベースよりやや濃いグレージュ */
  --color-accent: #003D62;   /* アクセント(ネイビー) */
  --color-text: #2B2B28;
  --color-white: #FFFFFF;
  --font-base: 'Zen Kaku Gothic New', 'Hiragino Kaku Gothic ProN', 'Meiryo', sans-serif;
  --max-width: 1120px;
  --max-width-narrow: 880px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-base);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}
a:hover { color: #002944; }

img { max-width: 100%; display: block; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}
.container--narrow {
  max-width: var(--max-width-narrow);
  margin: 0 auto;
  padding: 0 24px;
}

.eyebrow {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--color-accent);
  text-align: center;
  margin-bottom: 48px;
}

/* ------------------------- ボタン ------------------------- */
.btn {
  display: inline-block;
  background: var(--color-accent);
  color: var(--color-bg);
  padding: 16px 44px;
  border-radius: 3px;
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.05em;
  border: none;
  cursor: pointer;
  font-family: inherit;
}
.btn:hover { background: #002944; color: var(--color-bg); }

/* ------------------------- ヘッダー ------------------------- */
.site-header {
  background: var(--color-bg);
  border-bottom: 1px solid rgba(0, 61, 98, 0.12);
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 20px;
  padding-bottom: 20px;
  gap: 16px;
}
.site-logo {
  font-weight: 700;
  font-size: 18px;
  color: var(--color-accent);
  letter-spacing: 0.05em;
}
.site-header__right {
  display: flex;
  align-items: center;
  gap: 24px;
}
.site-nav {
  display: flex;
  gap: 28px;
}
.site-nav a {
  color: var(--color-accent);
  font-weight: 500;
  font-size: 14px;
}
.site-nav a[aria-current="page"] { font-weight: 700; }

/* ------------------------- 言語切替 ------------------------- */
.lang-switch {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.03em;
  flex-shrink: 0;
}
.lang-switch a {
  color: var(--color-accent);
  opacity: 0.45;
}
.lang-switch a.is-active {
  opacity: 1;
  text-decoration: underline;
  text-underline-offset: 3px;
}
.lang-switch span {
  color: var(--color-accent);
  opacity: 0.3;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-accent);
  margin: 5px 0;
}

/* ------------------------- フッター ------------------------- */
.site-footer {
  background: var(--color-accent);
  color: var(--color-bg);
}
.site-footer__inner {
  padding-top: 56px;
  padding-bottom: 32px;
}
.site-footer__name {
  font-weight: 700;
  font-size: 16px;
  margin-bottom: 12px;
}
.site-footer__info {
  font-size: 13px;
  line-height: 2;
  opacity: 0.85;
}
.site-footer__links {
  margin-top: 20px;
  font-size: 12px;
}
.site-footer__links a { color: var(--color-bg); opacity: 0.75; }
.site-footer__copyright {
  margin-top: 28px;
  font-size: 11px;
  opacity: 0.55;
}

/* ------------------------- 画像プレースホルダー ------------------------- */
.img-placeholder {
  background:
    repeating-linear-gradient(45deg, rgba(0,61,98,0.06), rgba(0,61,98,0.06) 10px, rgba(0,61,98,0.03) 10px, rgba(0,61,98,0.03) 20px),
    var(--color-bg-alt);
  border: 1px dashed rgba(0, 61, 98, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  opacity: 0.65;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-align: center;
  padding: 16px;
}

/* ------------------------- ページ共通見出し ------------------------- */
.page-title {
  padding-top: 72px;
  padding-bottom: 56px;
}
.page-title__label {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.28em;
  color: var(--color-accent);
  opacity: 0.75;
  margin-bottom: 16px;
}
.page-title h1 {
  font-weight: 900;
  font-size: 32px;
  color: var(--color-accent);
  margin: 0;
}

/* ------------------------- 番号付きリスト(サービス/実績共通) ------------------------- */
.numbered-list {
  display: flex;
  flex-direction: column;
}
.numbered-list__item {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  padding: 26px 0;
  border-bottom: 1px solid rgba(0, 61, 98, 0.12);
}
.numbered-list__item:last-child { border-bottom: none; }
.numbered-list__num {
  font-weight: 900;
  font-size: 22px;
  color: var(--color-accent);
  opacity: 0.32;
  min-width: 36px;
}
.numbered-list--on-navy .numbered-list__item { border-bottom-color: rgba(233, 228, 222, 0.18); }
.numbered-list--on-navy .numbered-list__num { color: var(--color-bg); opacity: 0.4; }
.numbered-list__title {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 8px;
}
.numbered-list__desc {
  font-size: 15.5px;
  line-height: 1.9;
  opacity: 0.85;
}

/* ------------------------- レスポンシブ ------------------------- */
@media (max-width: 768px) {
  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    flex-direction: column;
    gap: 0;
    border-bottom: 1px solid rgba(0, 61, 98, 0.12);
  }
  .site-nav.is-open { display: flex; }
  .site-nav a {
    padding: 14px 24px;
    border-top: 1px solid rgba(0, 61, 98, 0.08);
  }
  .nav-toggle { display: block; }

  .numbered-list__item { flex-direction: column; gap: 8px; }

  .page-title h1 { font-size: 26px; }
}