:root {
  --navy: #14223b;
  --navy-deep: #0d1828;
  --accent: #ffc02e;
  --gray: #6b7280;
  --line: #e5e7eb;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', Meiryo, sans-serif;
  color: var(--navy);
  line-height: 1.85;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px;
}

/* sample banner */
.sample-banner {
  background: var(--navy-deep);
  color: #fff;
  text-align: center;
  font-size: 0.8rem;
  padding: 8px 16px;
}

.sample-banner a {
  color: var(--accent);
  text-decoration: none;
}

/* header */
header {
  background: var(--navy);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 16px 0;
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.4rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: 0.05em;
}

.logo span {
  display: block;
  font-size: 0.6rem;
  letter-spacing: 0.3em;
  color: var(--accent);
  font-weight: 600;
}

nav {
  display: flex;
  align-items: center;
}

nav a {
  margin-left: 26px;
  text-decoration: none;
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.92rem;
}

nav a:hover { color: var(--accent); }

.nav-cta {
  background: var(--accent);
  color: var(--navy) !important;
  padding: 8px 18px;
  border-radius: 4px;
  font-weight: 700;
}

.nav-cta:hover { opacity: 0.85; }

/* hero */
.hero {
  min-height: 78vh;
  display: flex;
  align-items: center;
  color: #fff;
  background: linear-gradient(rgba(13, 24, 40, 0.72), rgba(13, 24, 40, 0.72)),
              url("https://images.unsplash.com/photo-1504307651254-35680f356dfd?auto=format&fit=crop&w=1500&q=80");
  background-size: cover;
  background-position: center;
}

.hero-inner {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

.hero-sub {
  font-size: 0.85rem;
  letter-spacing: 0.3em;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 18px;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.4;
  margin-bottom: 22px;
}

.hero-lead {
  font-size: 1.05rem;
  max-width: 540px;
  margin-bottom: 36px;
  color: rgba(255, 255, 255, 0.9);
}

.btn {
  display: inline-block;
  background: var(--accent);
  color: var(--navy);
  font-weight: 700;
  padding: 16px 40px;
  text-decoration: none;
  border-radius: 4px;
  transition: transform 0.2s;
}

.btn:hover { transform: translateY(-3px); }

/* sections */
section { padding: 90px 0; }

.section-label {
  text-align: center;
  font-size: 0.8rem;
  letter-spacing: 0.3em;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 8px;
}

.section-label.light { color: var(--accent); }

section h2 {
  text-align: center;
  font-size: 1.9rem;
  font-weight: 800;
  margin-bottom: 48px;
}

section h2.light { color: #fff; }

.bg-light { background: #f5f6f8; }
.bg-dark { background: var(--navy); }

/* business */
.biz-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 24px;
}

.biz-card {
  border: 1px solid var(--line);
  border-top: 4px solid var(--accent);
  padding: 30px 26px;
  transition: transform 0.2s, box-shadow 0.2s;
}

.biz-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 16px 36px rgba(20, 34, 59, 0.12);
}

.biz-num {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--accent);
}

.biz-card h3 {
  font-size: 1.15rem;
  margin: 8px 0 10px;
}

.biz-card p {
  font-size: 0.9rem;
  color: var(--gray);
}

/* works */
.works-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.work-item {
  background: var(--navy-deep);
  border-radius: 6px;
  overflow: hidden;
}

.work-photo {
  height: 190px;
  background-size: cover;
  background-position: center;
}

.photo-1 { background-image: url("https://images.unsplash.com/photo-1503387762-592deb58ef4e?auto=format&fit=crop&w=600&q=80"); }
.photo-2 { background-image: url("https://images.unsplash.com/photo-1581094794329-c8112a89af12?auto=format&fit=crop&w=600&q=80"); }
.photo-3 { background-image: url("https://images.unsplash.com/photo-1541888946425-d81bb19240f5?auto=format&fit=crop&w=600&q=80"); }

.work-text {
  padding: 18px 20px;
}

.work-cat {
  display: inline-block;
  background: var(--accent);
  color: var(--navy);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 12px;
  border-radius: 3px;
  margin-bottom: 8px;
}

.work-text p {
  color: #fff;
  font-size: 0.95rem;
}

/* strength */
.strength-list {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 50px;
  text-align: center;
}

.strength-item p:last-child {
  color: var(--gray);
  font-size: 0.92rem;
}

.strength-big {
  font-size: 3.2rem;
  font-weight: 800;
  color: var(--navy);
  line-height: 1.2;
}

.strength-big span {
  font-size: 1.1rem;
  color: var(--accent);
}

/* company */
.company-table {
  max-width: 680px;
  margin: 0 auto;
  width: 100%;
  border-collapse: collapse;
}

.company-table th,
.company-table td {
  padding: 16px 14px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  font-weight: normal;
}

.company-table th {
  width: 130px;
  color: var(--navy);
  font-weight: 700;
}

.company-table td { color: var(--gray); }

/* contact */
.contact-inner { text-align: center; }

.light-sub {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 24px;
}

.contact-tel {
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: 0.05em;
}

.contact-note {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
}

/* footer */
footer {
  background: var(--navy-deep);
  color: rgba(255, 255, 255, 0.55);
  text-align: center;
  padding: 28px 0;
  font-size: 0.85rem;
}

@media (max-width: 600px) {
  .hero h1 { font-size: 2rem; }
  nav a { margin-left: 14px; font-size: 0.78rem; }
  .nav-cta { padding: 6px 12px; }
  .strength-list { gap: 30px; }
}