:root {
    --primary-color: #1a365d; /* 信頼のネイビー */
    --accent-color: #48bb78;  /* 成長のグリーン */
    --text-color: #333;
    --light-bg: #f7fafc;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif; line-height: 1.6; color: var(--text-color); }
.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }

/* Header */
header { background: #fff; padding: 15px 0; border-bottom: 3px solid var(--primary-color); position: sticky; top: 0; z-index: 100; }
.header-inner { display: flex; justify-content: space-between; align-items: center; }
.logo img { height: 60px; width: auto; }
nav ul { display: flex; list-style: none; }
nav ul li { margin-left: 25px; }
nav a { text-decoration: none; color: var(--primary-color); font-weight: bold; }
.btn { background: var(--accent-color); color: #fff; padding: 10px 20px; border-radius: 5px; }

/* Hero */
.hero { background: linear-gradient(rgba(26, 54, 93, 0.8), rgba(26, 54, 93, 0.8)), url('hero-bg.jpg') center/cover; color: #fff; padding: 100px 0; text-align: center; }
.hero h1 { font-size: 2.5rem; margin-bottom: 20px; }

/* Sections */
.section-title { text-align: center; margin: 60px 0 40px; font-size: 2rem; color: var(--primary-color); }
.section-title span { display: block; font-size: 0.9rem; color: var(--accent-color); letter-spacing: 0.2em; }
.bg-light { background: var(--light-bg); padding: 60px 0; }

/* Service Grid */
.service-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; }
.service-card { background: #fff; padding: 30px; border-radius: 8px; border-top: 5px solid var(--accent-color); box-shadow: 0 4px 6px rgba(0,0,0,0.1); }
.service-card h3 { margin-bottom: 15px; color: var(--primary-color); }
.service-card ul { list-style: none; }
.service-card li::before { content: "✓"; color: var(--accent-color); margin-right: 8px; font-weight: bold; }

/* Strength */
.license-list { display: flex; flex-wrap: wrap; justify-content: center; list-style: none; margin-top: 30px; }
.license-list li { background: var(--primary-color); color: #fff; padding: 10px 20px; margin: 10px; border-radius: 30px; font-weight: bold; }

/* Footer */
footer { background: var(--primary-color); color: #fff; padding: 40px 0; margin-top: 60px; }
.footer-info h3 { margin-bottom: 10px; }
.copyright { text-align: center; margin-top: 30px; font-size: 0.8rem; opacity: 0.7; }

/* Responsive */
@media (max-width: 768px) {
    .header-inner { flex-direction: column; }
    nav ul { margin-top: 20px; }
    .hero h1 { font-size: 1.8rem; }
}