/* borderlessmarketing.net — 国際的・落ち着き。モノトーン × 差し色（朱）、英文主体、行間広め */
:root {
  --font-body: "Inter", "Helvetica Neue", Arial, "Noto Sans JP", sans-serif;
  --font-head: "Fraunces", Georgia, "Times New Roman", "Noto Sans JP", serif;
  --font-num: "Fraunces", Georgia, serif;
  --c-bg: #f6f4ef;
  --c-surface: #ffffff;
  --c-text: #141414;
  --c-muted: #5c5a55;
  --c-border: #d6d2c8;
  --c-accent: #c8412b;
  --c-on-accent: #ffffff;
  --c-link: #141414;
  --c-focus: #c8412b;
  --radius: 0;
  --container: 1000px;
  --lh-body: 1.9;
  --fs-body: 1.0625rem;
}
:lang(ja) { --font-body: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", sans-serif; }
:lang(ja) h1, :lang(ja) h2, :lang(ja) h3 { font-family: "Noto Sans JP", "Hiragino Sans", sans-serif; font-weight: 700; }
body:lang(ja), .alt-lang { font-family: var(--font-body); }

.eyebrow { font-size: 0.75rem; font-weight: 600; letter-spacing: 0.22em; text-transform: uppercase; color: var(--c-accent); margin-bottom: 12px; }
.section-title { font-size: clamp(1.625rem, 1.2rem + 1.6vw, 2.5rem); font-weight: 400; margin-bottom: 40px; letter-spacing: -0.01em; }
.section-alt { background: #ebe7de; }
.text-link { font-weight: 600; text-decoration: none; border-bottom: 1px solid currentColor; }

/* ヘッダー */
.site-header { border-bottom: 1px solid var(--c-text); }
.brand-text { font-family: var(--font-head); font-size: 1.25rem; font-weight: 600; letter-spacing: -0.01em; }
.site-nav a:not(.btn) { font-size: 0.875rem; font-weight: 500; letter-spacing: 0.02em; }
.nav-lang a { border: 1px solid var(--c-text); padding: 2px 10px; }

/* ヒーロー */
.hero { padding-block: clamp(64px, 12vw, 160px) clamp(56px, 9vw, 120px); }
.hero h1 { font-size: clamp(2.25rem, 1.4rem + 4vw, 4.5rem); font-weight: 400; line-height: 1.12; letter-spacing: -0.02em; max-width: 14em; }
.hero h1:lang(ja) { font-size: clamp(1.875rem, 1.3rem + 2.6vw, 3.25rem); line-height: 1.4; letter-spacing: 0; }
.hero .lead { margin-top: 28px; max-width: 36em; color: var(--c-muted); }
.hero-actions { margin-top: 40px; gap: 16px 28px; }

/* 課題 */
.numbered { display: grid; gap: 0; counter-reset: n; }
.numbered li { counter-increment: n; display: grid; gap: 4px 32px; padding: 28px 0; border-top: 1px solid var(--c-border); }
.numbered li:last-child { border-bottom: 1px solid var(--c-border); }
@media (min-width: 760px) { .numbered li { grid-template-columns: 64px 1fr 1.2fr; align-items: baseline; } }
.numbered li::before { content: counter(n, decimal-leading-zero); font-family: var(--font-num); font-size: 1.5rem; color: var(--c-accent); }
.numbered h3 { font-size: 1.25rem; font-weight: 600; }

/* サービス */
.services article { border-top: 3px solid var(--c-text); padding-top: 20px; }
.services h3 { font-size: 1.375rem; font-weight: 600; margin-bottom: 10px; }

/* 選ばれる理由 */
.why-list { display: grid; gap: 0; }
.why-list > div { padding: 24px 0; border-top: 1px solid var(--c-border); display: grid; gap: 6px 32px; }
@media (min-width: 760px) { .why-list > div { grid-template-columns: 1fr 1.2fr; } }
.why-list dt { font-family: var(--font-head); font-size: 1.25rem; font-weight: 600; }
.why-list dt:lang(ja) { font-family: "Noto Sans JP", sans-serif; font-weight: 700; }

/* CTA */
.cta-band { background: var(--c-text); color: #f6f4ef; padding-block: clamp(56px, 8vw, 96px); }
.cta-inner { display: grid; gap: 24px; align-items: center; justify-items: start; }
@media (min-width: 820px) { .cta-inner { grid-template-columns: 1fr auto; } }
.cta-band h2 { font-family: var(--font-head); font-size: clamp(1.5rem, 1.1rem + 1.6vw, 2.375rem); font-weight: 400; }
.cta-band h2:lang(ja) { font-family: "Noto Sans JP", sans-serif; font-weight: 700; }

/* 運営会社（要約） */
.company-summary { display: grid; gap: 28px; }
@media (min-width: 900px) { .company-summary { grid-template-columns: 1fr 1.3fr; } .company-summary .actions { grid-column: 1 / -1; } }
.company-summary h2 { font-size: 1.75rem; font-weight: 400; margin-bottom: 8px; }
.summary-list > div { display: grid; grid-template-columns: 8em 1fr; gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--c-border); }
.summary-list dt { color: var(--c-muted); font-size: 0.9375rem; }
.link-hq { font-weight: 600; }

/* 下層ページ */
.page-head { padding-block: clamp(56px, 8vw, 112px) clamp(24px, 4vw, 40px); }
.page-head h1 { font-size: clamp(2rem, 1.4rem + 2.4vw, 3.25rem); font-weight: 400; letter-spacing: -0.01em; }
.page-head h1:lang(ja) { font-size: clamp(1.75rem, 1.3rem + 1.6vw, 2.5rem); }
.page-head .lead { margin-top: 16px; color: var(--c-muted); }
.section-tight { padding-block: clamp(24px, 4vw, 48px) clamp(64px, 8vw, 112px); }
.hq-box { background: var(--c-surface); border-left: 4px solid var(--c-accent); padding: clamp(24px, 4vw, 40px); margin-bottom: 56px; }
.hq-box h2 { font-size: 1.375rem; font-weight: 600; margin-bottom: 8px; }
.hq-action { margin-top: 20px; display: flex; flex-direction: column; align-items: flex-start; gap: 8px; }
.hq-url { font-size: 0.875rem; color: var(--c-muted); }
.table-title { font-size: 1.375rem; font-weight: 600; margin-bottom: 12px; }
.prose h2 { font-family: var(--font-head); font-weight: 600; }
.btn { letter-spacing: 0.02em; }

/* フッター */
.site-footer { border-top: 1px solid var(--c-text); }
.footer-brand { font-family: var(--font-head); font-size: 1.125rem; }
.footer-hq { font-weight: 600; }
.copyright { color: var(--c-muted); }