*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --navy:  #0d1b2a;
  --navy2: #1b2d42;
  --navy3: #243447;
  --gold:  #b8965a;
  --gold2: #d4af70;
  --white: #f5f5f5;
  --gray:  #9aa5b4;
  --light: #e8edf2;
  --accent:#4a90a4;
}
html { scroll-behavior: smooth; }
body { font-family: 'Noto Sans JP', sans-serif; background: #f8f9fa; color: #1a2e4a; line-height: 1.8; font-size: 16px; }
header { position: fixed; top: 0; left: 0; right: 0; z-index: 100; background: rgba(255,255,255,0.97); backdrop-filter: blur(8px); border-bottom: 1px solid rgba(26,46,74,0.1); padding: 12px 24px; display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.logo { font-family: 'Noto Serif JP', serif; font-size: 1.05rem; color: var(--gold); letter-spacing: 0.08em; text-decoration: none; flex-shrink: 0; }
.logo span { display: block; font-size: 0.6rem; color: var(--gray); font-family: 'Noto Sans JP', sans-serif; letter-spacing: 0.1em; margin-top: 2px; }
header nav { display: flex; gap: 20px; align-items: center; }
header nav a { font-size: 0.8rem; color: #1a2e4a; text-decoration: none; letter-spacing: 0.05em; white-space: nowrap; transition: color 0.2s; }
header nav a:hover, header nav a.active { color: var(--gold); }
.header-cta a { background: var(--gold); color: var(--navy); text-decoration: none; padding: 10px 18px; border-radius: 4px; font-size: 0.78rem; font-weight: 700; letter-spacing: 0.05em; transition: background 0.2s; white-space: nowrap; flex-shrink: 0; }
.header-cta a:hover { background: var(--gold2); }
.hamburger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 4px; flex-shrink: 0; }
.hamburger span { display: block; width: 22px; height: 2px; background: #1a2e4a; border-radius: 2px; }
.mobile-nav { display: none; position: fixed; top: 56px; left: 0; right: 0; background: #fff; z-index: 99; border-bottom: 1px solid rgba(26,46,74,0.1); flex-direction: column; padding: 8px 0 16px; box-shadow: 0 4px 20px rgba(0,0,0,0.1); }
.mobile-nav.open { display: flex; }
.mobile-nav a { padding: 14px 24px; font-size: 0.9rem; color: #1a2e4a; text-decoration: none; border-bottom: 1px solid rgba(26,46,74,0.06); }
.mobile-nav a.active { color: var(--gold); }
.mobile-nav .mobile-cta { margin: 12px 24px 0; background: var(--gold); color: var(--navy); text-align: center; padding: 14px; border-radius: 4px; font-weight: 700; border-bottom: none; }
.page-hero { background: linear-gradient(to bottom, var(--navy) 0%, var(--navy2) 100%); padding: 120px 24px 60px; text-align: center; }
.page-hero h1 { font-family: 'Noto Serif JP', serif; font-size: clamp(1.6rem, 4vw, 2.4rem); color: var(--white); font-weight: 600; letter-spacing: 0.06em; }
.breadcrumb { background: #f0f2f5; padding: 12px 24px; font-size: 0.78rem; color: #5a6a7a; display: flex; gap: 8px; align-items: center; }
.breadcrumb a { color: var(--gold); text-decoration: none; }
section { padding: 80px 24px; }
.container { max-width: 860px; margin: 0 auto; }
.section-label { font-size: 0.7rem; letter-spacing: 0.25em; color: var(--gold); text-transform: uppercase; margin-bottom: 10px; }
.section-title { font-family: 'Noto Serif JP', serif; font-size: clamp(1.3rem, 3vw, 1.9rem); font-weight: 600; margin-bottom: 40px; line-height: 1.5; color: inherit; }
.dark-section { background: var(--navy); color: var(--white); }
.dark-section .section-title { color: var(--white); }
.divider { width: 40px; height: 1px; background: var(--gold); margin: 0 auto 40px; }
.btn-primary { display: inline-block; background: var(--gold); color: var(--navy); text-decoration: none; padding: 14px 32px; border-radius: 4px; font-weight: 700; font-size: 0.92rem; letter-spacing: 0.05em; transition: background 0.2s, transform 0.2s; }
.btn-primary:hover { background: var(--gold2); transform: translateY(-2px); }
.btn-outline { display: inline-block; border: 1px solid var(--gold); color: var(--gold); text-decoration: none; padding: 14px 32px; border-radius: 4px; font-weight: 500; font-size: 0.92rem; letter-spacing: 0.05em; transition: background 0.2s, transform 0.2s; }
.btn-outline:hover { background: rgba(184,150,90,0.1); transform: translateY(-2px); }
footer { background: #080f18; padding: 48px 24px; text-align: center; border-top: 1px solid rgba(184,150,90,0.15); }
.footer-logo { font-family: 'Noto Serif JP', serif; font-size: 1.1rem; color: var(--gold); margin-bottom: 16px; }
.footer-nav { display: flex; gap: 20px; justify-content: center; flex-wrap: wrap; margin-bottom: 16px; }
.footer-nav a { font-size: 0.78rem; color: var(--gray); text-decoration: none; }
.footer-nav a:hover { color: var(--gold); }
.footer-copy { font-size: 0.75rem; color: var(--gray); margin-bottom: 16px; line-height: 1.8; }
.footer-links { display: flex; gap: 20px; justify-content: center; flex-wrap: wrap; margin-bottom: 16px; }
.footer-links a { font-size: 0.72rem; color: #555; text-decoration: none; }
.footer-links a:hover { color: var(--gold); }
.floating-cta { position: fixed; bottom: 24px; right: 24px; z-index: 200; }
.floating-btn { display: flex; align-items: center; gap: 10px; background: var(--gold); color: var(--navy); text-decoration: none; padding: 14px 20px; border-radius: 4px; font-weight: 700; font-size: 0.82rem; box-shadow: 0 4px 20px rgba(0,0,0,0.4); transition: transform 0.2s, background 0.2s; }
.floating-btn:hover { transform: translateY(-2px); background: var(--gold2); }
.floating-btn svg { width: 18px; height: 18px; flex-shrink: 0; }
@media (max-width: 860px) { header nav { display: none; } .hamburger { display: flex; } }
@media (max-width: 480px) {
  header { padding: 10px 14px; }
  .logo { font-size: 0.85rem; }
  .logo span { font-size: 0.52rem; }
  .header-cta a { padding: 8px 12px; font-size: 0.72rem; }
  section { padding: 48px 16px; }
  .page-hero { padding: 100px 16px 48px; }
  .section-title { margin-bottom: 28px; }
  .btn-primary, .btn-outline { padding: 13px 20px; font-size: 0.85rem; width: 100%; text-align: center; box-sizing: border-box; }
  .floating-btn { padding: 12px 16px; font-size: 0.78rem; }
  .floating-cta { bottom: 16px; right: 16px; }
  footer { padding: 36px 16px; }
  .footer-nav { gap: 12px; }
  .footer-links { gap: 12px; }
}

/* ===== Blog / Column Styles ===== */
.blog-list-section { padding: 60px 0 80px; background: #0d1b2a; }
.blog-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 28px; max-width: 860px; margin: 0 auto; padding: 0 24px; }
.blog-card { background: #1b2d42; border-radius: 8px; overflow: hidden; box-shadow: 0 2px 12px rgba(0,0,0,0.3); transition: transform 0.2s, box-shadow 0.2s; }
.blog-card:hover { transform: translateY(-4px); box-shadow: 0 6px 24px rgba(0,0,0,0.4); }
.blog-card-link { text-decoration: none; color: inherit; display: block; }
.blog-card-image { position: relative; height: 200px; overflow: hidden; }
.blog-card-image img { width: 100%; height: 100%; object-fit: cover; }
.blog-category { position: absolute; top: 12px; left: 12px; background: var(--gold); color: var(--navy); font-size: 11px; padding: 3px 10px; border-radius: 20px; font-weight: 700; }
.blog-card-content { padding: 20px; }
.blog-date { font-size: 11px; color: var(--gray); display: block; margin-bottom: 8px; }
.blog-title { font-size: 15px; font-weight: 600; line-height: 1.6; margin-bottom: 10px; color: var(--white); font-family: 'Noto Serif JP', serif; }
.blog-excerpt { font-size: 13px; color: var(--gray); line-height: 1.7; margin-bottom: 14px; }
.read-more { font-size: 12px; color: var(--gold); font-weight: 600; }

/* Article page */
.blog-article-section { padding: 60px 24px 80px; background: #0d1b2a; }
.blog-article { max-width: 760px; margin: 0 auto; background: #1b2d42; border-radius: 8px; padding: 48px 48px 40px; box-shadow: 0 2px 12px rgba(0,0,0,0.3); }
.article-header { margin-bottom: 36px; border-bottom: 1px solid rgba(255,255,255,0.1); padding-bottom: 24px; }
.article-date { font-size: 11px; color: var(--gray); margin-right: 12px; }
.article-category { background: var(--gold); color: var(--navy); font-size: 11px; padding: 3px 10px; border-radius: 20px; font-weight: 700; }
.article-title { font-size: 22px; font-weight: 700; line-height: 1.5; margin-top: 14px; color: var(--white); font-family: 'Noto Serif JP', serif; }
.article-content h2 { font-size: 18px; font-weight: 700; color: var(--white); margin: 36px 0 14px; padding-left: 12px; border-left: 3px solid var(--gold); font-family: 'Noto Serif JP', serif; }
.article-content h3 { font-size: 16px; font-weight: 600; color: var(--gold2); margin: 24px 0 10px; font-family: 'Noto Serif JP', serif; }
.article-content p { font-size: 15px; line-height: 1.9; color: #c8d4e0; margin-bottom: 18px; }
.article-content ol, .article-content ul { padding-left: 24px; margin-bottom: 18px; }
.article-content li { font-size: 15px; line-height: 1.9; color: #c8d4e0; margin-bottom: 8px; }
.highlight-box { background: rgba(184,150,90,0.1); border: 1px solid rgba(184,150,90,0.3); border-radius: 8px; padding: 24px 28px; margin: 28px 0; }
.highlight-box h3 { color: var(--gold); margin-top: 0; }
.article-footer { margin-top: 40px; padding-top: 28px; border-top: 1px solid rgba(255,255,255,0.1); display: flex; gap: 16px; flex-wrap: wrap; }

@media (max-width: 768px) {
  .blog-article { padding: 28px 20px; }
  .article-title { font-size: 18px; }
  .blog-grid { grid-template-columns: 1fr; padding: 0 16px; }
}

@media (max-width: 480px) {
  .blog-article { padding: 20px 16px; }
  .article-title { font-size: 16px; }
  .blog-article-section { padding: 40px 16px 60px; }
  .highlight-box { padding: 16px 18px; }
}