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

:root {
  --black: #0a0a0a;
  --dark: #1a1a2e;
  --gray-900: #111827;
  --gray-700: #374151;
  --gray-500: #6b7280;
  --gray-300: #d1d5db;
  --gray-100: #f3f4f6;
  --white: #ffffff;
  --accent: #2563eb;
  --accent-light: #3b82f6;
  --accent-dark: #1d4ed8;
  --font-sans: 'Inter', 'Noto Sans JP', sans-serif;
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.3s ease;
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 48px rgba(0,0,0,0.12);
}
html { scroll-behavior: smooth; }
body { font-family: var(--font-sans); color: var(--gray-900); background: var(--white); line-height: 1.7; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
ul { list-style: none; }
img { max-width: 100%; display: block; }
.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 14px 32px; font-size: 0.9rem; font-weight: 600; letter-spacing: 0.04em; border-radius: 6px; border: 2px solid transparent; cursor: pointer; transition: var(--transition); white-space: nowrap; }
.btn-primary { background: var(--accent); color: var(--white); border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-dark); border-color: var(--accent-dark); transform: translateY(-1px); box-shadow: 0 8px 24px rgba(37,99,235,0.3); }
.btn-outline { background: transparent; color: var(--white); border-color: rgba(255,255,255,0.5); }
.btn-outline:hover { background: rgba(255,255,255,0.1); border-color: var(--white); }
.btn-lg { padding: 16px 48px; font-size: 1rem; }
.section-header { text-align: center; margin-bottom: 64px; }
.section-eyebrow { font-size: 0.75rem; font-weight: 700; letter-spacing: 0.15em; text-transform: uppercase; color: var(--accent); margin-bottom: 12px; }
.section-header.light .section-eyebrow { color: rgba(255,255,255,0.6); }
.section-title { font-size: clamp(1.8rem, 3vw, 2.5rem); font-weight: 700; line-height: 1.25; letter-spacing: -0.02em; color: var(--gray-900); }
.section-header.light .section-title { color: var(--white); }
.section-desc { margin-top: 16px; font-size: 1rem; color: var(--gray-500); max-width: 480px; margin-left: auto; margin-right: auto; }
.section-header.light .section-desc { color: rgba(255,255,255,0.65); }
#header { position: fixed; top: 0; left: 0; right: 0; z-index: 100; padding: 0; transition: background 0.4s ease, box-shadow 0.4s ease; }
#header.scrolled { background: rgba(255,255,255,0.96); backdrop-filter: blur(12px); box-shadow: 0 1px 0 rgba(0,0,0,0.08); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo { display: flex; flex-direction: column; line-height: 1; }
.logo-main { font-size: 1.4rem; font-weight: 700; letter-spacing: -0.02em; color: var(--white); transition: var(--transition); }
.logo-sub { font-size: 0.6rem; color: rgba(255,255,255,0.7); letter-spacing: 0.1em; transition: var(--transition); }
#header.scrolled .logo-main { color: var(--dark); }
#header.scrolled .logo-sub { color: var(--gray-500); }
.nav ul { display: flex; align-items: center; gap: 8px; }
.nav ul li a { font-size: 0.875rem; font-weight: 500; color: rgba(255,255,255,0.85); padding: 8px 16px; border-radius: 6px; transition: var(--transition); }
.nav ul li a:hover { color: var(--white); background: rgba(255,255,255,0.1); }
#header.scrolled .nav ul li a { color: var(--gray-700); }
#header.scrolled .nav ul li a:hover { color: var(--gray-900); background: var(--gray-100); }
.nav-cta { background: var(--accent) !important; color: var(--white) !important; padding: 8px 20px !important; }
.nav-cta:hover { background: var(--accent-dark) !important; }
#header.scrolled .nav-cta { color: var(--white) !important; }
.hamburger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 4px; }
.hamburger span { display: block; width: 24px; height: 2px; background: var(--white); border-radius: 2px; transition: var(--transition); }
#header.scrolled .hamburger span { background: var(--gray-900); }
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; background: linear-gradient(135deg, #0a0a1a 0%, #1a1a3e 40%, #0d2461 70%, #1a3a6e 100%); }
.hero-bg::after { content: ''; position: absolute; inset: 0; background: radial-gradient(ellipse at 70% 50%, rgba(37,99,235,0.2) 0%, transparent 60%), radial-gradient(ellipse at 20% 80%, rgba(139,92,246,0.1) 0%, transparent 50%); }
.hero-inner { position: relative; z-index: 1; padding-top: 120px; padding-bottom: 80px; }
.hero-eyebrow { font-size: 0.8rem; font-weight: 600; letter-spacing: 0.2em; text-transform: uppercase; color: rgba(255,255,255,0.5); margin-bottom: 20px; }
.hero-title { font-size: clamp(2.8rem, 6vw, 5rem); font-weight: 700; line-height: 1.15; letter-spacing: -0.03em; color: var(--white); margin-bottom: 24px; }
.hero-sub { font-size: clamp(1rem, 1.5vw, 1.15rem); color: rgba(255,255,255,0.65); line-height: 1.8; margin-bottom: 40px; max-width: 520px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-scroll { position: absolute; bottom: 40px; left: 50%; transform: translateX(-50%); z-index: 1; }
.hero-scroll span { display: block; width: 1px; height: 60px; background: linear-gradient(to bottom, rgba(255,255,255,0.4), transparent); margin: 0 auto; animation: scrollLine 2s ease-in-out infinite; }
@keyframes scrollLine { 0% { opacity: 0; transform: scaleY(0); transform-origin: top; } 50% { opacity: 1; transform: scaleY(1); transform-origin: top; } 100% { opacity: 0; transform: scaleY(1); transform-origin: bottom; } }
.stats { background: var(--gray-100); padding: 56px 0; }
.stats-inner { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
.stat-item { text-align: center; padding: 24px 16px; border-right: 1px solid var(--gray-300); }
.stat-item:last-child { border-right: none; }
.stat-num { font-size: clamp(2rem, 3vw, 2.8rem); font-weight: 700; color: var(--dark); letter-spacing: -0.04em; line-height: 1; margin-bottom: 8px; }
.stat-num span { font-size: 0.6em; font-weight: 600; color: var(--accent); }
.stat-label { font-size: 0.8rem; color: var(--gray-500); font-weight: 500; letter-spacing: 0.05em; }
.business { padding: 112px 0; }
.business-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.business-card { background: var(--white); border: 1px solid var(--gray-300); border-radius: var(--radius); padding: 40px 32px; position: relative; transition: var(--transition); overflow: hidden; }
.business-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: linear-gradient(90deg, var(--accent), var(--accent-light)); transform: scaleX(0); transform-origin: left; transition: transform 0.4s ease; }
.business-card:hover { border-color: transparent; box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.business-card:hover::before { transform: scaleX(1); }
.business-card-icon { width: 56px; height: 56px; background: var(--gray-100); border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; margin-bottom: 24px; color: var(--accent); transition: var(--transition); }
.business-card-icon svg { width: 28px; height: 28px; }
.business-card:hover .business-card-icon { background: var(--accent); color: var(--white); }
.business-card-num { font-size: 0.7rem; font-weight: 700; letter-spacing: 0.1em; color: var(--accent); margin-bottom: 8px; }
.business-card-title { font-size: 1.2rem; font-weight: 700; color: var(--gray-900); margin-bottom: 16px; letter-spacing: -0.01em; }
.business-card-text { font-size: 0.875rem; color: var(--gray-500); line-height: 1.8; margin-bottom: 24px; }
.business-card-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.business-card-tags li { font-size: 0.72rem; font-weight: 600; color: var(--accent); background: rgba(37,99,235,0.08); border-radius: 4px; padding: 4px 10px; letter-spacing: 0.02em; }
.strengths { background: var(--dark); padding: 112px 0; }
.strengths-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.strength-item { text-align: center; }
.strength-icon { width: 64px; height: 64px; margin: 0 auto 24px; color: rgba(255,255,255,0.4); display: flex; align-items: center; justify-content: center; }
.strength-icon svg { width: 100%; height: 100%; }
.strength-item h3 { font-size: 1rem; font-weight: 700; color: var(--white); margin-bottom: 12px; }
.strength-item p { font-size: 0.85rem; color: rgba(255,255,255,0.55); line-height: 1.8; }
.company { padding: 112px 0; background: var(--gray-100); }
.company-inner { max-width: 720px; margin: 0 auto; }
.company-table { width: 100%; border-collapse: collapse; }
.company-table tr { border-bottom: 1px solid var(--gray-300); }
.company-table tr:first-child { border-top: 1px solid var(--gray-300); }
.company-table th, .company-table td { padding: 20px 24px; text-align: left; font-size: 0.9rem; vertical-align: top; }
.company-table th { width: 180px; font-weight: 700; color: var(--gray-700); background: var(--white); }
.company-table td { color: var(--gray-700); background: var(--white); }
.company-table td a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.company-table td a:hover { color: var(--accent-dark); }
.contact { background: var(--dark); padding: 112px 0; }
.contact-form { max-width: 680px; margin: 0 auto; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.form-group { margin-bottom: 24px; }
.form-group label { display: block; font-size: 0.8rem; font-weight: 600; color: rgba(255,255,255,0.7); margin-bottom: 8px; letter-spacing: 0.04em; }
.required { color: #f87171; }
.form-group input, .form-group select, .form-group textarea { width: 100%; background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.15); border-radius: var(--radius-sm); padding: 14px 16px; font-size: 0.9rem; color: var(--white); font-family: var(--font-sans); transition: var(--transition); -webkit-appearance: none; }
.form-group input::placeholder, .form-group textarea::placeholder { color: rgba(255,255,255,0.25); }
.form-group select { cursor: pointer; }
.form-group select option { background: var(--dark); color: var(--white); }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: none; border-color: var(--accent); background: rgba(255,255,255,0.08); box-shadow: 0 0 0 3px rgba(37,99,235,0.2); }
.form-submit { text-align: center; margin-top: 8px; }
.form-note { text-align: center; margin-top: 20px; }
.form-note p { font-size: 0.78rem; color: rgba(255,255,255,0.4); }
.footer { background: var(--black); padding: 64px 0 0; }
.footer-inner { display: flex; align-items: flex-start; justify-content: space-between; padding-bottom: 48px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.footer-logo { font-size: 1.6rem; font-weight: 700; color: var(--white); letter-spacing: -0.02em; margin-bottom: 8px; }
.footer-tagline { font-size: 0.8rem; color: rgba(255,255,255,0.35); letter-spacing: 0.05em; }
.footer-nav ul { display: flex; gap: 32px; }
.footer-nav ul li a { font-size: 0.85rem; color: rgba(255,255,255,0.5); transition: var(--transition); }
.footer-nav ul li a:hover { color: var(--white); }
.footer-bottom { padding: 24px 0; }
.footer-bottom p { font-size: 0.75rem; color: rgba(255,255,255,0.25); text-align: center; letter-spacing: 0.04em; }
.fade-up { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-up.visible { opacity: 1; transform: translateY(0); }
@media (max-width: 1024px) { .strengths-grid { grid-template-columns: repeat(2, 1fr); gap: 40px 32px; } }
@media (max-width: 768px) {
  .business-grid { grid-template-columns: 1fr; }
  .stats-inner { grid-template-columns: repeat(2, 1fr); }
  .stat-item:nth-child(2) { border-right: none; }
  .stat-item:nth-child(3) { border-top: 1px solid var(--gray-300); }
  .form-row { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; gap: 32px; }
  .footer-nav ul { flex-wrap: wrap; gap: 16px; }
  .company-table th { width: 120px; }
  .section-header { margin-bottom: 40px; }
  .business, .strengths, .company, .contact { padding: 80px 0; }
  .hamburger { display: flex; }
  .nav { position: fixed; top: 72px; left: 0; right: 0; background: var(--white); padding: 16px 24px 24px; box-shadow: var(--shadow-lg); transform: translateY(-110%); opacity: 0; transition: transform 0.35s ease, opacity 0.35s ease; pointer-events: none; }
  .nav.open { transform: translateY(0); opacity: 1; pointer-events: all; }
  .nav ul { flex-direction: column; gap: 4px; }
  .nav ul li a { color: var(--gray-700) !important; display: block; padding: 12px 16px; }
  .nav ul li a:hover { background: var(--gray-100) !important; color: var(--gray-900) !important; }
  .nav-cta { color: var(--white) !important; }
  .hero-title { font-size: clamp(2.4rem, 8vw, 3.5rem); }
  .hero-actions { flex-direction: column; width: fit-content; }
}
@media (max-width: 480px) {
  .strengths-grid { grid-template-columns: 1fr; }
  .stats-inner { grid-template-columns: repeat(2, 1fr); }
  .company-table th, .company-table td { padding: 14px 12px; font-size: 0.82rem; }
  .company-table th { width: 100px; }
}