/* ============================================
   geo-llms.com 共通CSS（ニュートラル白黒）
   トップ・about・contact など上位レイヤー用
   ============================================ */

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
body{font-family:'Noto Sans JP',sans-serif;color:#1a1a1a;background:#fff;line-height:1.8;-webkit-font-smoothing:antialiased;}
a{color:#1a1a1a;text-decoration:none;}

/* Container */
.container{max-width:960px;margin:0 auto;padding:0 20px;}

/* Header */
.site-header{border-bottom:1px solid #e5e5e5;padding:16px 0;}
.site-header .container{display:flex;align-items:center;justify-content:space-between;}
.site-logo{font-family:'Playfair Display',serif;font-size:22px;font-weight:600;letter-spacing:0.5px;}
.site-logo span{font-weight:400;color:#888;}
.header-nav{display:flex;gap:24px;}
.header-nav a{font-size:14px;font-weight:500;color:#555;transition:color 0.2s;}
.header-nav a:hover{color:#1a1a1a;}

/* Hamburger */
.hamburger{display:none;background:none;border:none;cursor:pointer;padding:8px;flex-direction:column;gap:5px;}
.hamburger span{display:block;width:22px;height:2px;background:#1a1a1a;transition:0.3s;}
.hamburger.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px);}
.hamburger.active span:nth-child(2){opacity:0;}
.hamburger.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px);}
.mobile-nav{display:none;background:#fafafa;border-bottom:1px solid #e5e5e5;padding:12px 20px;}
.mobile-nav.open{display:flex;flex-direction:column;gap:8px;}
.mobile-nav a{font-size:15px;padding:10px 0;border-bottom:1px solid #eee;color:#333;}
.mobile-nav a:last-child{border-bottom:none;}

@media(max-width:768px){
  .header-nav{display:none;}
  .hamburger{display:flex;}
}

/* Hero */
.hero{padding:80px 0 60px;text-align:center;}
.hero-label{font-family:'Playfair Display',serif;font-size:13px;letter-spacing:2px;text-transform:uppercase;color:#999;display:block;margin-bottom:16px;}
.hero h1{font-size:28px;font-weight:700;line-height:1.5;margin-bottom:20px;}
.hero-meta{font-size:14px;color:#888;}
.hero-intro{font-size:15px;color:#666;line-height:2;max-width:600px;margin:0 auto;}

@media(max-width:480px){
  .hero{padding:48px 0 40px;}
  .hero h1{font-size:22px;}
}

/* Section */
section{margin-bottom:48px;}
.section-label{font-family:'Playfair Display',serif;font-size:12px;letter-spacing:2px;text-transform:uppercase;color:#999;margin-bottom:8px;}
h2{font-size:22px;font-weight:700;margin-bottom:16px;}
h3{font-size:18px;font-weight:700;margin-bottom:12px;}
.section-lead{font-size:16px;color:#444;line-height:2;margin-bottom:24px;}

/* Insight Box */
.insight-box{background:#f8f8f8;border-left:4px solid #ccc;border-radius:8px;padding:20px 24px;margin-bottom:20px;}
.insight-box p{font-size:15px;color:#444;line-height:2;}
.insight-box a{color:#333;font-weight:600;text-decoration:underline;}

/* Contact Form */
.contact-form{max-width:640px;}
.hp-field{position:absolute;left:-9999px;opacity:0;height:0;overflow:hidden;}
.form-group{margin-bottom:24px;}
.form-label{display:block;font-size:15px;font-weight:600;margin-bottom:8px;}
.form-required{color:#c00;font-size:12px;font-weight:400;margin-left:4px;}
.form-hint{font-size:13px;color:#888;margin-bottom:8px;}
.form-input,.form-select,.form-textarea{width:100%;padding:12px 16px;font-size:15px;font-family:inherit;border:1px solid #ddd;border-radius:8px;background:#fff;transition:border-color 0.2s;appearance:none;-webkit-appearance:none;}
.form-input:focus,.form-select:focus,.form-textarea:focus{outline:none;border-color:#888;}
.form-input-short{max-width:200px;}
.form-select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23666' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 16px center;padding-right:40px;}
.form-textarea{resize:vertical;min-height:140px;}
.form-submit{display:inline-block;padding:14px 48px;font-size:16px;font-weight:700;font-family:inherit;color:#fff;background:#1a1a1a;border:none;border-radius:8px;cursor:pointer;transition:background 0.2s;}
.form-submit:hover{background:#333;}
.form-submit:disabled{background:#999;cursor:not-allowed;}
.form-note{font-size:13px;color:#999;margin-top:16px;}

/* Category Grid (top page) */
.section-title{font-size:22px;font-weight:700;margin-bottom:28px;}
.category-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px;margin-top:28px;}
.category-card{display:block;border:1px solid #e5e5e5;border-radius:12px;padding:32px 28px;transition:border-color 0.2s,box-shadow 0.2s;}
.category-card:hover{border-color:#bbb;box-shadow:0 4px 16px rgba(0,0,0,0.06);}
.category-card-label{font-family:'Playfair Display',serif;font-size:12px;letter-spacing:1.5px;text-transform:uppercase;color:#aaa;margin-bottom:10px;}
.category-card-title{font-size:17px;font-weight:700;line-height:1.6;}
.category-card-desc{font-size:13px;color:#888;margin-top:10px;line-height:1.8;}
.category-card-arrow{display:inline-block;margin-top:16px;font-size:13px;font-weight:600;color:#555;}

/* Footer */
.site-footer{border-top:1px solid #e5e5e5;margin-top:80px;padding:32px 0;text-align:center;}
.footer-links{display:flex;justify-content:center;gap:24px;flex-wrap:wrap;margin-bottom:16px;}
.footer-links a{font-size:13px;color:#888;transition:color 0.2s;}
.footer-links a:hover{color:#1a1a1a;}
.site-footer p{font-size:12px;color:#aaa;}