/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --color-dark: #0c1222;
  --color-slate: #334155;
  --color-blue: #2563eb;
  --color-gray-dark: #1f2937;
  --color-gray-mid: #6b7280;
  --color-gray-light: #e5e7eb;
  --color-white: #ffffff;
  --color-bg-section: #f8fafc;
  --color-footer: #0c1222;
  --font-sans: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', Arial, sans-serif;
  --max-w: 1200px;
  --header-h: 80px;
}

html { scroll-behavior: smooth; }
body { font-family: var(--font-sans); font-size: 15px; color: var(--color-dark); background: var(--color-white); line-height: 1.8; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }

/* ===== HEADER ===== */
header { position: fixed; top: 0; left: 0; right: 0; height: var(--header-h); background: rgba(255,255,255,0.98); border-bottom: 1px solid var(--color-gray-light); z-index: 1000; display: flex; align-items: center; padding: 0 48px; }
.header-inner { width: 100%; max-width: var(--max-w); margin: 0 auto; display: flex; align-items: center; justify-content: space-between; }
.logo { font-size: 18px; font-weight: 700; color: var(--color-dark); }
.logo span { color: var(--color-blue); }
nav ul { list-style: none; display: flex; gap: 32px; }
nav ul li a { font-size: 13px; font-weight: 500; color: var(--color-slate); transition: color 0.2s; }
nav ul li a:hover { color: var(--color-blue); }
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; background: none; border: none; padding: 4px; }
.hamburger span { display: block; width: 24px; height: 2px; background: var(--color-dark); }

/* ===== MOBILE NAV ===== */
.mobile-nav { display: none; position: fixed; top: var(--header-h); left: 0; right: 0; bottom: 0; background: var(--color-white); z-index: 999; padding: 0 40px; flex-direction: column; }
.mobile-nav.open { display: flex; }
.mobile-nav a { font-size: 15px; font-weight: 500; color: var(--color-dark); border-bottom: 1px solid var(--color-gray-light); padding: 20px 0; }

/* ===== MAIN ===== */
main { padding-top: var(--header-h); }

/* ===== HERO ===== */
.hero { min-height: 100vh; display: flex; align-items: center; justify-content: center; text-align: center; background: linear-gradient(135deg, #f0f4ff 0%, #e8f0fe 50%, #f0f7ff 100%); padding: 80px 40px; position: relative; overflow: hidden; }
.hero::before { content: ''; position: absolute; inset: 0; background: radial-gradient(ellipse at 30% 50%, rgba(37,99,235,0.07) 0%, transparent 60%), radial-gradient(ellipse at 70% 50%, rgba(12,18,34,0.04) 0%, transparent 60%); }
.hero-content { position: relative; z-index: 1; max-width: 800px; }
.hero-tagline-en { font-size: clamp(28px, 4.5vw, 56px); font-weight: 300; letter-spacing: 0.02em; color: var(--color-dark); line-height: 1.3; margin-bottom: 16px; }
.hero-tagline-ja { font-size: 14px; color: var(--color-slate); letter-spacing: 0.2em; margin-bottom: 24px; }
.hero-company { font-size: 14px; letter-spacing: 0.12em; color: var(--color-dark); font-weight: 600; }
.hero-links { margin-top: 40px; display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn-outline { display: inline-block; padding: 12px 32px; border: 1px solid var(--color-blue); color: var(--color-blue); font-size: 13px; font-weight: 500; letter-spacing: 0.08em; transition: all 0.2s; border-radius: 2px; }
.btn-outline:hover { background: var(--color-blue); color: var(--color-white); }

/* ===== SECTIONS ===== */
section { padding: 100px 48px; }
.container { max-width: var(--max-w); margin: 0 auto; }
.section-label { font-size: 12px; font-weight: 700; letter-spacing: 0.15em; text-transform: uppercase; color: var(--color-blue); margin-bottom: 12px; }
.section-title { font-size: clamp(22px, 2.5vw, 30px); font-weight: 400; letter-spacing: 0.04em; margin-bottom: 56px; color: var(--color-dark); border-bottom: 2px solid var(--color-gray-light); padding-bottom: 20px; }
.section-title span { display: block; font-size: 0.55em; color: var(--color-gray-mid); margin-top: 6px; font-weight: 400; }

/* ===== ABOUT ===== */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: start; }
.about-text p { font-size: 14px; line-height: 2.2; color: var(--color-slate); margin-bottom: 20px; }
.about-text .author { font-size: 13px; color: var(--color-dark); font-weight: 600; }
.about-image img { width: 100%; aspect-ratio: 4/3; object-fit: cover; border-radius: 2px; }
.about-cta-links { margin-top: 32px; display: flex; gap: 12px; flex-wrap: wrap; }
.link-arrow { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; font-weight: 500; color: var(--color-blue); border: 1px solid var(--color-blue); padding: 8px 20px; transition: all 0.2s; border-radius: 2px; }
.link-arrow::after { content: '→'; }
.link-arrow:hover { background: var(--color-blue); color: var(--color-white); }

/* ===== BUSINESS ===== */
.business-section { background: var(--color-bg-section); }
.business-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.business-card { display: flex; flex-direction: column; background: var(--color-white); overflow: hidden; border: 1px solid var(--color-gray-light); transition: box-shadow 0.2s, transform 0.2s; border-radius: 4px; }
.business-card:hover { box-shadow: 0 8px 24px rgba(12,18,34,0.1); transform: translateY(-2px); }
.business-card img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }
.business-card-body { padding: 16px; }
.card-num { font-size: 11px; color: var(--color-blue); font-weight: 700; letter-spacing: 0.1em; margin-bottom: 6px; }
.business-card h3 { font-size: 13px; font-weight: 500; color: var(--color-dark); line-height: 1.6; }
.read-more-wrap { margin-top: 40px; text-align: center; }
.btn-readmore { display: inline-block; padding: 12px 48px; border: 1px solid var(--color-blue); font-size: 13px; font-weight: 500; color: var(--color-blue); transition: all 0.2s; border-radius: 2px; }
.btn-readmore:hover { background: var(--color-blue); color: var(--color-white); }

/* ===== INVESTMENT ===== */
.investment-grid { display: flex; flex-direction: column; }
.investment-item { display: grid; grid-template-columns: 1fr 1fr; border-bottom: 1px solid var(--color-gray-light); padding: 64px 0; align-items: center; }
.investment-item:first-child { border-top: 1px solid var(--color-gray-light); }
.investment-item:nth-child(even) .investment-img { order: 2; }
.investment-item:nth-child(even) .investment-content { order: 1; padding-left: 0; padding-right: 60px; }
.investment-img img { width: 100%; aspect-ratio: 16/9; object-fit: cover; border-radius: 4px; }
.investment-content { padding-left: 60px; }
.investment-content h3 { font-size: 18px; font-weight: 600; margin-bottom: 8px; line-height: 1.5; color: var(--color-dark); }
.investment-subtitle { font-size: 13px; color: var(--color-blue); margin-bottom: 20px; font-weight: 500; }
.investment-content p { font-size: 13px; line-height: 2.1; color: var(--color-slate); margin-bottom: 12px; }

/* ===== NEWS ===== */
.news-section { background: var(--color-bg-section); }
.news-list { list-style: none; }
.news-list li { border-bottom: 1px solid var(--color-gray-light); }
.news-list li:first-child { border-top: 1px solid var(--color-gray-light); }
.news-list li a { display: flex; align-items: center; gap: 24px; padding: 20px 0; transition: opacity 0.2s; }
.news-list li a:hover { opacity: 0.6; }
.news-date { font-size: 13px; color: var(--color-gray-mid); white-space: nowrap; min-width: 90px; }
.news-tag { display: inline-block; font-size: 11px; padding: 3px 10px; border: 1px solid var(--color-blue); color: var(--color-blue); white-space: nowrap; min-width: 70px; text-align: center; border-radius: 2px; font-weight: 500; }
.news-title { font-size: 14px; color: var(--color-dark); }
.news-more-link { margin-top: 36px; text-align: center; }

/* ===== CONTACT CTA ===== */
.contact-section { background: var(--color-dark); color: var(--color-white); text-align: center; padding: 80px 48px; }
.contact-section .section-label { color: var(--color-blue); }
.contact-section .section-title { color: var(--color-white); border-color: rgba(255,255,255,0.1); margin-bottom: 32px; }
.contact-section p { color: rgba(255,255,255,0.65); font-size: 14px; margin-bottom: 32px; }
.btn-white { display: inline-block; padding: 14px 48px; border: 1px solid rgba(255,255,255,0.7); color: var(--color-white); font-size: 13px; font-weight: 500; letter-spacing: 0.1em; transition: all 0.25s; border-radius: 2px; }
.btn-white:hover { background: var(--color-white); color: var(--color-dark); }

/* ===== FOOTER ===== */
footer { background: var(--color-footer); padding: 64px 48px 40px; }
.footer-inner { max-width: var(--max-w); margin: 0 auto; }
.footer-top { display: grid; grid-template-columns: 2.5fr repeat(4, 1fr); gap: 40px; margin-bottom: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.footer-brand .logo { color: rgba(255,255,255,0.95); font-size: 16px; margin-bottom: 16px; }
.footer-brand .logo span { color: var(--color-blue) !important; }
.footer-brand .logo span { color: var(--color-blue); }
.footer-brand address { font-style: normal; font-size: 12px; line-height: 2; color: rgba(255,255,255,0.35); }
.footer-col h4 { font-size: 11px; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: rgba(255,255,255,0.8); margin-bottom: 16px; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { font-size: 12px; color: rgba(255,255,255,0.35); transition: color 0.2s; }
.footer-col ul li a:hover { color: var(--color-blue); }
.footer-bottom { font-size: 11px; color: rgba(255,255,255,0.25); }

/* ===== PAGE HEADER ===== */
.page-header { background: linear-gradient(135deg, #f0f4ff 0%, #e8f0fe 100%); padding: 72px 48px 48px; border-bottom: 1px solid var(--color-gray-light); }
.page-header h1 { font-size: clamp(22px, 3vw, 32px); font-weight: 400; letter-spacing: 0.06em; max-width: var(--max-w); margin: 0 auto; color: var(--color-dark); }
.page-header h1 span { display: block; font-size: 0.5em; font-weight: 400; color: var(--color-slate); margin-top: 8px; letter-spacing: 0.15em; }

/* ===== PAGE CONTENT ===== */
.page-content { padding: 80px 48px; }
.page-inner { max-width: 900px; margin: 0 auto; }

/* ===== NEWS DETAIL ===== */
.news-detail-date { font-size: 13px; color: var(--color-gray-mid); margin-bottom: 8px; }
.news-detail-tag { display: inline-block; font-size: 11px; padding: 3px 10px; border: 1px solid var(--color-blue); color: var(--color-blue); margin-bottom: 28px; border-radius: 2px; font-weight: 500; }
.news-detail-title { font-size: 22px; font-weight: 500; margin-bottom: 40px; padding-bottom: 32px; border-bottom: 1px solid var(--color-gray-light); line-height: 1.6; color: var(--color-dark); }
.news-detail-body { font-size: 14px; line-height: 2.2; color: var(--color-slate); }
.news-detail-body p { margin-bottom: 20px; }
.back-link { display: inline-flex; align-items: center; gap: 8px; margin-top: 56px; font-size: 13px; font-weight: 500; color: var(--color-blue); border: 1px solid var(--color-blue); padding: 10px 24px; transition: all 0.2s; border-radius: 2px; }
.back-link:hover { background: var(--color-blue); color: var(--color-white); }
.back-link::before { content: '←'; margin-right: 4px; }

/* ===== COMPANY TABLE ===== */
.company-table { width: 100%; border-collapse: collapse; margin-bottom: 72px; }
.company-table tr { border-bottom: 1px solid var(--color-gray-light); }
.company-table tr:first-child { border-top: 1px solid var(--color-gray-light); }
.company-table th { width: 200px; padding: 24px 0; text-align: left; font-size: 13px; font-weight: 600; color: var(--color-dark); vertical-align: top; }
.company-table td { padding: 24px 0 24px 32px; font-size: 14px; color: var(--color-slate); line-height: 1.9; }
.access-info { font-size: 14px; color: var(--color-slate); margin-bottom: 20px; }
.map-img { width: 100%; max-height: 420px; object-fit: cover; border-radius: 4px; }

/* ===== CONTACT FORM ===== */
.contact-form { display: flex; flex-direction: column; gap: 28px; }
.form-group { display: flex; flex-direction: column; gap: 8px; }
.form-group label { font-size: 13px; font-weight: 600; color: var(--color-dark); }
.form-group input, .form-group textarea { padding: 12px 16px; border: 1px solid var(--color-gray-light); font-family: var(--font-sans); font-size: 14px; outline: none; transition: border-color 0.2s; background: var(--color-white); border-radius: 4px; }
.form-group input:focus, .form-group textarea:focus { border-color: var(--color-blue); }
.form-group textarea { min-height: 200px; resize: vertical; }
.submit-btn { align-self: flex-start; padding: 14px 56px; background: var(--color-blue); color: var(--color-white); border: none; font-family: var(--font-sans); font-size: 13px; font-weight: 500; letter-spacing: 0.1em; cursor: pointer; transition: opacity 0.2s; border-radius: 4px; }
.submit-btn:hover { opacity: 0.8; }

/* ===== PRIVACY ===== */
.privacy-section { margin-bottom: 52px; }
.privacy-section h2 { font-size: 16px; font-weight: 600; margin-bottom: 16px; padding-bottom: 12px; border-bottom: 2px solid var(--color-gray-light); color: var(--color-dark); }
.privacy-section p, .privacy-section ol li { font-size: 13px; line-height: 2.2; color: var(--color-slate); margin-bottom: 12px; }
.privacy-section ol { padding-left: 24px; }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .business-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 900px) {
  nav { display: none; }
  .hamburger { display: flex; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .investment-item { grid-template-columns: 1fr; gap: 32px; padding: 48px 0; }
  .investment-item:nth-child(even) .investment-img { order: 0; }
  .investment-item:nth-child(even) .investment-content { order: 0; padding-right: 0; padding-left: 0; }
  .investment-content { padding-left: 0; }
}
@media (max-width: 640px) {
  section { padding: 64px 24px; }
  header { padding: 0 24px; }
  .page-header { padding: 56px 24px 40px; }
  .page-content { padding: 56px 24px; }
  .footer-top { grid-template-columns: 1fr; }
  footer { padding: 48px 24px 32px; }
  .business-grid { grid-template-columns: 1fr; }
  .news-list li a { flex-wrap: wrap; gap: 8px; }
  .company-table th { width: 120px; }
  .about-cta-links { flex-direction: column; }
  .contact-section { padding: 64px 24px; }
}