/* 基本設定 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f9f9f9;
}

.container {
    width: 90%;
    max-width: 1000px;
    margin: 0 auto;
}

/* ヘッダー */
header {
    background-color: #fff;
    border-bottom: 3px solid #0056b3;
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo {
    font-size: 1.8rem;
    color: #0056b3;
}

.nav-links {
    list-style: none;
    display: flex;
}

.nav-links li {
    margin-left: 1.5rem;
}

.nav-links a {
    text-decoration: none;
    color: #555;
    font-weight: bold;
}

.nav-links a.active, .nav-links a:hover {
    color: #0056b3;
}

/* ヒーローセクション */
.hero {
    background-color: #0056b3;
    color: #fff;
    padding: 6rem 0;
    text-align: center;
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

.btn {
    display: inline-block;
    background-color: #ffcc00;
    color: #333;
    padding: 0.8rem 2rem;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    cursor: pointer;
    border: none;
}

.btn:hover {
    background-color: #e6b800;
}

/* メインコンテンツ */
main {
    padding: 4rem 0;
}

section {
    margin-bottom: 3rem;
}

.intro {
    text-align: center;
}

.features {
    display: flex;
    justify-content: space-between;
    gap: 20px;
}

.feature-item {
    background: #fff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    flex: 1;
}

/* ページ共通ヘッダー */
.page-header {
    background-color: #eee;
    padding: 3rem 0;
    text-align: center;
}

/* 事業内容・実績 */
.service-list, .works-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.service-card, .work-item {
    background: #fff;
    padding: 1.5rem;
    border: 1px solid #ddd;
    border-radius: 5px;
}

.work-img-placeholder {
    background-color: #ccc;
    height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    font-weight: bold;
    color: #666;
}

/* 会社概要テーブル */
.info-table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
}

.info-table th, .info-table td {
    padding: 1.2rem;
    border-bottom: 1px solid #ddd;
    text-align: left;
}

.info-table th {
    width: 30%;
    background-color: #f2f2f2;
}

/* フォーム */
.contact-form {
    max-width: 600px;
    margin: 0 auto;
    background: #fff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: bold;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 0.7rem;
    border: 1px solid #ccc;
    border-radius: 4px;
}

/* フッター */
footer {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 2rem 0;
    margin-top: 4rem;
}

/* レスポンシブ */
@media (max-width: 768px) {
    .header-inner {
        flex-direction: column;
    }
    .nav-links {
        margin-top: 1rem;
    }
    .nav-links li {
        margin: 0 0.5rem;
    }
    .features {
        flex-direction: column;
    }
}