* { box-sizing: border-box; }
body {
    font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
    font-size: 19px; line-height: 1.8; color: #1a2a40; margin: 0; padding: 0; background-color: #f0f4f8;
}

/* --- ヘッダー：横並びのシンプルな信頼感 --- */
.global-header {
    background-color: #ffffff;
    border-bottom: 3px solid #1a2a40;
    position: sticky; top: 0; z-index: 1000;
}

.header-inner {
    max-width: 1000px; margin: 0 auto;
    display: flex; justify-content: space-between; align-items: center; padding: 10px 20px;
}

.header-logo a {
    text-decoration: none; color: #1a2a40; font-size: 22px; font-weight: 900;
}
.header-logo span {
    border-left: 5px solid #e67e22; padding-left: 12px;
}

.nav-list { display: flex; list-style: none; margin: 0; padding: 0; }
.nav-item a {
    display: block; padding: 15px 20px; color: #1a2a40;
    text-decoration: none; font-size: 18px; font-weight: 900;
}
.nav-item a:hover { color: #e67e22; }

/* --- コンテンツ：SEO構造化（H1, H2, H3） --- */
.container { 
    width: 100%; max-width: 800px; margin: 0 auto; padding: 50px 20px; 
    background-color: #fff; box-shadow: 0 0 20px rgba(0,0,0,0.05);
}

/* H1は1つだけ */
h1.main-copy {
    font-size: 28px; color: #fff; background-color: #1a2a40;
    padding: 30px; margin: 0 0 40px 0; border-radius: 8px; line-height: 1.5;
}

/* H2でセクションを区切る */
h2.section-title {
    font-size: 24px; color: #1a2a40; border-left: 8px solid #1a2a40;
    padding: 5px 15px; margin: 50px 0 25px;
}

/* H3で小項目 */
h3.price-label {
    font-size: 20px; color: #e67e22; font-weight: bold; margin-bottom: 20px;
}

.service-box { background: #f0f4f8; padding: 30px; border-radius: 12px; margin-top: 20px; }
.price-container { background-color: #fff; border: 3px solid #e67e22; padding: 35px; border-radius: 15px; margin: 60px 0; }

.cta-button {
    display: block; background: #e67e22; color: #fff !important; 
    padding: 30px; border-radius: 10px; text-decoration: none; text-align: center;
}
.btn-main { font-size: 26px; font-weight: bold; display: block; }

.global-footer { background: #1a2a40; color: #fff; text-align: center; padding: 40px; margin-top: 80px; font-size: 14px; }

/* モバイル：無理に2列にせず、横並びを維持するか折り返す */
@media screen and (max-width: 600px) {
    .header-inner { flex-direction: column; }
    .nav-list { flex-wrap: wrap; justify-content: center; }
    .nav-item a { padding: 10px; font-size: 15px; }
    h1.main-copy { font-size: 22px; padding: 25px; }
}