/* Reset */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
  color: #333;
  line-height: 1.8;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; }

/* Layout */
.container { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* Header */
.site-header {
  position: fixed; top: 0; left: 0; right: 0;
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid #e5e5e5;
  z-index: 100;
}
.site-header .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.site-header .logo { height: 36px; }
.site-header nav { display: flex; gap: 32px; font-size: 14px; font-weight: 500; }
.site-header nav a:hover { color: #555; }

/* Hamburger */
.menu-toggle {
  display: none; background: none; border: none; cursor: pointer;
  width: 28px; height: 20px; position: relative; padding: 0;
}
.menu-toggle span {
  display: block; width: 100%; height: 2px; background: #333;
  position: absolute; left: 0; transition: .3s;
}
.menu-toggle span:nth-child(1) { top: 0; }
.menu-toggle span:nth-child(2) { top: 9px; }
.menu-toggle span:nth-child(3) { top: 18px; }
.menu-toggle.open span:nth-child(1) { top: 9px; transform: rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { top: 9px; transform: rotate(-45deg); }

/* Hero */
.hero {
  margin-top: 64px;
  padding: 100px 24px;
  background: linear-gradient(135deg, #666 0%, #888 100%);
  color: #fff;
  text-align: center;
}
.hero h1 { font-size: 2.4rem; font-weight: 700; letter-spacing: .04em; margin-bottom: 20px; }
.hero p { font-size: 1.1rem; opacity: .85; max-width: 600px; margin: 0 auto 36px; }
.btn {
  display: inline-block; padding: 14px 40px;
  background: #9a946a; color: #fff;
  border-radius: 6px; font-size: 15px; font-weight: 600;
  transition: background .2s;
}
.btn:hover { background: #555; }

/* Section */
.section { padding: 80px 0; }
.section:nth-child(even) { background: #f7f8fa; }
.section-title {
  text-align: center; font-size: 1.6rem; font-weight: 700;
  margin-bottom: 12px;
}
.section-sub {
  text-align: center; font-size: .9rem; color: #888;
  margin-bottom: 48px; text-transform: uppercase; letter-spacing: .1em;
}

/* Service cards */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 28px; }
.card {
  background: #fff; border: 1px solid #e8e8e8; border-radius: 10px;
  padding: 36px 28px;
  transition: box-shadow .2s;
}
.card:hover { box-shadow: 0 4px 20px rgba(0,0,0,.08); }
.card h3 { font-size: 1.15rem; margin-bottom: 12px; }
.card p { font-size: .92rem; color: #666; }

/* Strengths */
.strengths { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 32px; text-align: center; }
.strengths .item h3 { font-size: 1.05rem; margin: 12px 0 8px; }
.strengths .item p { font-size: .88rem; color: #666; }
.strengths .num { font-size: 2.4rem; font-weight: 700; color: #777; }

/* Company table */
.company-table { width: 100%; max-width: 720px; margin: 0 auto; border-collapse: collapse; }
.company-table th,
.company-table td { padding: 16px 20px; border-bottom: 1px solid #e5e5e5; text-align: left; font-size: .94rem; }
.company-table th { width: 160px; color: #555; font-weight: 600; background: #f9fafb; }

/* CTA */
.cta {
  padding: 64px 24px; text-align: center;
  background: linear-gradient(135deg, #666 0%, #888 100%);
  color: #fff;
}
.cta h2 { font-size: 1.5rem; margin-bottom: 12px; }
.cta p { opacity: .8; margin-bottom: 28px; }

/* Page header */
.page-header {
  margin-top: 64px;
  padding: 60px 24px;
  background: linear-gradient(135deg, #666 0%, #888 100%);
  color: #fff;
  text-align: center;
}
.page-header h1 { font-size: 1.8rem; font-weight: 700; margin-bottom: 12px; }
.page-header p { font-size: .95rem; opacity: .85; }

/* Contact form */
.contact-form { max-width: 600px; margin: 0 auto; }
.form-group { margin-bottom: 24px; }
.form-group label {
  display: block; font-size: .9rem; font-weight: 600;
  color: #555; margin-bottom: 8px;
}
.form-group input,
.form-group textarea {
  width: 100%; padding: 12px 16px;
  border: 1px solid #ddd; border-radius: 6px;
  font-size: .95rem; font-family: inherit;
  line-height: 1.6; background: #fff;
  transition: border-color .2s;
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none; border-color: #999;
}
.contact-form .btn {
  width: 100%; padding: 14px;
  border: none; cursor: pointer; font-family: inherit;
}
#result { text-align: center; margin-top: 20px; font-size: .95rem; }
#result.ok { color: #2e7d32; }
#result.ng { color: #c62828; }

/* Footer */
.site-footer {
  padding: 32px 24px; text-align: center;
  font-size: .82rem; color: #999; background: #fafafa;
  border-top: 1px solid #e5e5e5;
}

/* Responsive */
@media (max-width: 768px) {
  .menu-toggle { display: block; }

  .site-header nav {
    display: none; flex-direction: column; gap: 0;
    position: absolute; top: 64px; left: 0; right: 0;
    background: #fff; border-bottom: 1px solid #e5e5e5;
    font-size: 15px;
  }
  .site-header nav.open { display: flex; }
  .site-header nav a { padding: 16px 24px; border-top: 1px solid #f0f0f0; }
  .site-header nav a:hover { background: #f7f8fa; }

  .hero { padding: 56px 20px; }
  .hero h1 { font-size: 1.4rem; letter-spacing: .02em; }
  .hero p { font-size: .95rem; margin-bottom: 28px; }
  .btn { padding: 12px 32px; font-size: 14px; }

  .section { padding: 48px 0; }
  .section-title { font-size: 1.3rem; }
  .section-sub { margin-bottom: 32px; }

  .cards { grid-template-columns: 1fr; gap: 16px; }
  .card { padding: 28px 20px; }

  .strengths { grid-template-columns: 1fr; gap: 24px; }

  .company-table th,
  .company-table td { padding: 12px 16px; font-size: .88rem; }
  .company-table th { width: 120px; }

  .cta { padding: 48px 20px; }
  .cta h2 { font-size: 1.2rem; }

  .page-header { padding: 40px 20px; }
  .page-header h1 { font-size: 1.4rem; }
}