/* --- 基本設定 --- */
:root {
    --primary-color: #E60012; /* ロゴの赤 */
    --text-color: #333333;
    --bg-color: #ffffff;
    --gray-bg: #f5f7fa;
    --font-gothic: 'Noto Sans JP', sans-serif;
    --font-serif: 'Noto Serif JP', serif;
}

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

body {
    font-family: var(--font-gothic);
    color: var(--text-color);
    line-height: 1.8;
    background-color: var(--bg-color);
}

a {
    text-decoration: none;
    color: inherit;
    transition: opacity 0.3s;
}

a:hover {
    opacity: 0.7;
}

ul {
    list-style: none;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

/* --- ヘッダー --- */
.site-header {
    height: 80px;
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    z-index: 100;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    display: flex;
    align-items: center;
}

.logo-mark {
    color: var(--primary-color);
    margin-right: 10px;
    font-size: 1.2em;
}

.site-nav ul {
    display: flex;
    gap: 30px;
    align-items: center;
}

.site-nav a {
    font-size: 0.9rem;
    font-weight: 500;
}

.btn-contact {
    background-color: var(--primary-color);
    color: #fff !important;
    padding: 10px 20px;
    border-radius: 4px;
}

/* --- ヒーローエリア --- */
.hero {
    height: 70vh;
    background: linear-gradient(rgba(0,0,0,0.4), rgba(0,0,0,0.4)), url('https://placehold.co/1920x1080/666/999?text=City+View'); /* 仮の画像 */
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #fff;
}

.hero-sub {
    font-size: 1.1rem;
    margin-bottom: 20px;
    font-weight: 500;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 20px;
    font-family: var(--font-serif); /* ここだけ明朝体で威厳を出す */
}

.hero-en {
    font-size: 0.9rem;
    letter-spacing: 0.1em;
    opacity: 0.8;
}

/* --- セクション共通 --- */
.section {
    padding: 80px 0;
}

.bg-gray {
    background-color: var(--gray-bg);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    font-family: var(--font-serif);
    color: var(--text-color);
    margin-bottom: 10px;
}

.section-subtitle {
    font-size: 0.9rem;
    color: var(--primary-color);
    font-weight: 700;
    letter-spacing: 0.1em;
}

/* --- 企業理念 --- */
.philosophy-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.philosophy-content h3 {
    font-size: 1.8rem;
    margin-bottom: 30px;
    font-feature-settings: "palt";
}

/* --- 事業内容 --- */
.service-grid {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
}

.service-card {
    flex: 1;
    min-width: 280px;
    background: #fff;
    padding: 40px 30px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s;
}

.service-card:hover {
    transform: translateY(-5px);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 1.2rem;
    margin-bottom: 15px;
    border-bottom: 2px solid var(--primary-color);
    display: inline-block;
    padding-bottom: 5px;
}

/* --- 会社概要 --- */
.company-table {
    width: 100%;
    border-collapse: collapse;
    max-width: 800px;
    margin: 0 auto;
}

.company-table th,
.company-table td {
    padding: 20px;
    border-bottom: 1px solid #eee;
    text-align: left;
}

.company-table th {
    width: 30%;
    font-weight: 700;
    background-color: #fafafa;
}

/* --- フッター --- */
.site-footer {
    background-color: #222;
    color: #fff;
    padding: 60px 0 20px;
    font-size: 0.85rem;
}

.footer-container {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.footer-logo {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 15px;
}

.footer-links ul {
    display: flex;
    gap: 20px;
}

.staff-only {
    color: #444; /* 背景に馴染ませて見えにくくする */
    font-size: 0.7rem;
}

.staff-only:hover {
    color: var(--primary-color);
}

.copyright {
    text-align: center;
    border-top: 1px solid #444;
    padding-top: 20px;
    color: #888;
}

/* --- スマホ対応 (レスポンシブ) --- */
@media (max-width: 768px) {
    .site-nav {
        display: none; /* 簡易的に非表示（本来はハンバーガーメニューにする） */
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .service-grid {
        flex-direction: column;
    }
    
    .footer-container {
        flex-direction: column;
        gap: 30px;
    }
    
    .footer-links ul {
        flex-direction: column;
        gap: 10px;
    }
    
    .company-table th, .company-table td {
        display: block;
        width: 100%;
    }
    
    .company-table th {
        border-bottom: none;
        padding-bottom: 5px;
    }
}