/* Base */
:root {
  --bg: #ffffff;
  --text: #1a1a1a;
  --muted: #6b7280;
  --accent: #004aad;
  --accent2: #cb6ce6;
  --card: #ffffff;
  --border: #e5e7eb;
  --header-h: 60px; /* ヘッダー高さ（fixed用） */
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  padding-top: var(--header-h); /* 固定ヘッダー分のスペース */
  background: var(--bg);
  color: var(--text);
  font-family: 'Noto Sans JP', system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
  line-height: 1.7;
  position: relative;
  overflow-x: hidden;
}
body::before {
  content: "";
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 20% 50%, rgba(0, 217, 255, 0.06) 0%, transparent 50%),
              radial-gradient(circle at 80% 80%, rgba(168, 85, 247, 0.05) 0%, transparent 50%);
  animation: gradientShift 20s ease infinite;
  pointer-events: none;
  z-index: 0;
}
@keyframes gradientShift {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(-10%, -10%); }
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--text); text-decoration: none; }
a.link { color: var(--accent); }

/* メインコンテンツを一枚のパネルにし、背面グラデーションの透けを防ぐ */
main {
  position: relative;
  z-index: 1;
  background: var(--bg);
  min-height: 60vh;
}

.container { width: min(1200px, 92%); margin: 0 auto; position: relative; z-index: 1; }
.sp { display: none; }
@media (max-width: 768px) { 
  .sp { display: inline; }
  .hero { padding: 80px 0 60px; }
  .hero-title { font-size: clamp(28px, 8vw, 30px); }
  .hero-lead { max-width: 100%; }
  .section { padding: 60px 0; }
  .origin-grid { gap: 12px; }
  .origin-card { padding: 14px; }
  .cards { gap: 16px; }
  .card { padding: 18px; }
  .card-icon img { width: 60px; height: 60px; }
  .btn { padding: 10px 16px; font-size: 14px; }
}

/* Header（常に画面上部に固定） */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10;
  backdrop-filter: saturate(1.2) blur(12px);
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 4px 24px rgba(0, 217, 255, 0.08);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; min-height: 32px; box-sizing: content-box; }
.logo { font-weight: 700; letter-spacing: 0.08em; background: linear-gradient(135deg, var(--accent), var(--accent2)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; font-size: 28px; }
.nav ul { list-style: none; display: flex; gap: 18px; padding: 0; margin: 0; align-items: center; flex-wrap: nowrap; overflow-x: auto; -ms-overflow-style: none; scrollbar-width: none; }
.nav a { opacity: 0.85; }
.nav a.btn { opacity: 1; }

/* Hero */
.hero { padding: 140px 0 100px; background: linear-gradient(180deg, rgba(0, 217, 255, 0.08), transparent); position: relative; }
.hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.hero-content { z-index: 2; }
.hero-visual { display: flex; justify-content: center; align-items: center; }
.hero-image { max-width: 100%; height: auto; opacity: 0.9; animation: float 6s ease-in-out infinite; }
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
}
.hero-title { font-size: clamp(32px, 5vw, 35px); line-height: 1.15; letter-spacing: 0.02em; margin: 0 0 16px; background: linear-gradient(135deg, #1a1a1a, var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-title br { display: block; }
.hero-lead { max-width: 720px; color: var(--muted); margin: 0 0 28px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { order: -1; max-width: 400px; margin: 0 auto; }
  .header-inner { padding: 12px 0; }
  .logo { font-size: 24px; }
  .nav ul { gap: 12px; }
  .nav a { font-size: 14px; }
}

@media (max-width: 768px) {
  .nav ul { gap: 8px; }
  .nav a { font-size: 12px; white-space: nowrap; }
  .nav ul::-webkit-scrollbar { display: none; }
}

/* Sections */
.section { padding: 96px 0; border-top: none; scroll-margin-top: 80px; }
.section-accent { background: radial-gradient(1000px 500px at 10% 0%, rgba(0, 217, 255, 0.04), transparent); position: relative; }
.section-accent::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, transparent, var(--accent), transparent); opacity: 0.3; }
.section-muted { background: #f8f9fa; }
.section-title { font-size: clamp(24px, 3vw, 32px); margin: 0 0 18px; }

/* Tab Navigation（ヘッダー直下でスティッキー） */
.tab-navigation { background: var(--bg); border-bottom: 2px solid var(--border); position: sticky; top: var(--header-h); z-index: 9; backdrop-filter: blur(8px); margin-top: -96px; padding-top: 96px; overflow-x: auto; -ms-overflow-style: none; scrollbar-width: none; }
.tab-navigation .container { display: flex; gap: 0; }
.tab-navigation .container::-webkit-scrollbar { display: none; }
.tab-btn { background: transparent; border: none; padding: 16px 32px; font-size: 16px; font-weight: 600; color: var(--muted); cursor: pointer; position: relative; transition: all .3s ease; border-bottom: 3px solid transparent; font-family: inherit; white-space: nowrap; }
.tab-btn:hover { color: var(--text); background: rgba(0, 217, 255, 0.05); }
.tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }
.tab-btn.active::after { content: ""; position: absolute; bottom: -2px; left: 0; right: 0; height: 3px; background: linear-gradient(90deg, var(--accent), var(--accent2)); }

/* Tab Content */
.tab-content { display: none; }
.tab-content.active { display: block; }

@media (max-width: 768px) {
  .tab-btn { padding: 14px 20px; font-size: 14px; }
  .tab-navigation { top: var(--header-h); }
}

@media (max-width: 480px) {
  .tab-btn { padding: 12px 16px; font-size: 13px; }
}

/* Origin */
.origin-visual { text-align: center; margin-bottom: 40px; }
.origin-image { max-width: 600px; width: 100%; height: auto; }

.origin-layout { display: grid; grid-template-columns: 1fr 2fr; gap: 24px; margin-bottom: 24px; }

.origin-re { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 24px; box-shadow: 0 2px 8px rgba(0,0,0,0.04); position: relative; }
.origin-re::before { content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 3px; background: linear-gradient(90deg, var(--accent), var(--accent2)); border-radius: 12px 12px 0 0; }
.origin-re h3 { margin: 0 0 12px; font-size: 28px; background: linear-gradient(135deg, var(--accent), var(--accent2)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; text-align: center; }
.origin-re p { margin: 0; color: var(--muted); line-height: 1.7; }

.origin-clip-wrapper { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 24px; box-shadow: 0 2px 8px rgba(0,0,0,0.04); position: relative; }
.origin-clip-wrapper::before { content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 3px; background: linear-gradient(90deg, var(--accent), var(--accent2)); border-radius: 12px 12px 0 0; }
.origin-clip-wrapper > h3 { font-size: 28px; margin: 0 0 20px; text-align: center; background: linear-gradient(135deg, var(--accent), var(--accent2)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

.origin-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.origin-card { background: rgba(0, 217, 255, 0.03); border: 1px solid rgba(0, 217, 255, 0.15); border-radius: 10px; padding: 16px; transition: all .3s ease; }
.origin-card:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(0, 217, 255, 0.12); border-color: var(--accent); background: rgba(0, 217, 255, 0.05); }
.origin-card dt { font-weight: 600; margin: 0 0 6px; font-size: 15px; color: var(--text); }
.origin-card dd { margin: 0; color: var(--muted); line-height: 1.6; font-size: 14px; }
.origin-message { margin-top: 32px; color: var(--muted); text-align: center; font-size: 15px; line-height: 1.8; }

@media (max-width: 900px) {
  .origin-layout { grid-template-columns: 1fr; gap: 20px; }
  .origin-grid { grid-template-columns: 1fr; gap: 12px; }
  .origin-re h3, .origin-clip-wrapper > h3 { font-size: 24px; }
  .origin-image { max-width: 100%; }
}

/* Company Info */
.company-info { max-width: 800px; margin: 0 auto; background: var(--card); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; box-shadow: 0 2px 8px rgba(0,0,0,0.04); }
.company-row { display: grid; grid-template-columns: 200px 1fr; gap: 24px; padding: 20px 32px; border-bottom: 1px solid var(--border); transition: background .2s ease; }
.company-row:last-child { border-bottom: none; }
.company-row:hover { background: rgba(0, 217, 255, 0.02); }
.company-row dt { font-weight: 600; color: var(--text); display: flex; align-items: center; }
.company-row dd { margin: 0; color: var(--muted); display: flex; align-items: center; line-height: 1.6; }
@media (max-width: 768px) {
  .company-row { grid-template-columns: 1fr; gap: 8px; padding: 16px 20px; }
  .company-row dt { font-size: 14px; }
  .company-row dd { font-size: 15px; }
}

@media (max-width: 480px) {
  .company-row { padding: 14px 16px; }
  .company-row dt { font-size: 13px; }
  .company-row dd { font-size: 14px; }
}

/* About */
.feature-list { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; padding: 0; list-style: none; }
.feature-list li { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 16px; box-shadow: 0 2px 8px rgba(0,0,0,0.04); transition: all .3s ease; }
.feature-list li:hover { border-color: var(--accent); box-shadow: 0 8px 24px rgba(0, 217, 255, 0.1); transform: translateY(-2px); }
@media (max-width: 900px) { .feature-list { grid-template-columns: 1fr; } }

/* Services */
.cards { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 20px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 24px; box-shadow: 0 2px 8px rgba(0,0,0,0.04); transition: all .3s ease; position: relative; overflow: hidden; }
.card::before { content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 3px; background: linear-gradient(90deg, var(--accent), var(--accent2)); opacity: 0; transition: opacity .3s ease; }
.card:hover::before { opacity: 1; }
.card:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(0, 217, 255, 0.15), 0 0 0 1px var(--accent); border-color: var(--accent); }
.card-icon { margin-bottom: 16px; animation: iconPulse 3s ease-in-out infinite; }
@keyframes iconPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}
.card-icon img { display: block; margin: 0; }
.card h3 { margin-top: 0; background: linear-gradient(135deg, var(--text), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
@media (max-width: 900px) { .cards { grid-template-columns: 1fr; } }

/* Buttons */
.btn { display: inline-block; padding: 12px 18px; border-radius: 999px; font-weight: 600; border: 1px solid var(--border); transition: all .3s ease; box-shadow: 0 4px 12px rgba(0, 217, 255, 0.1); position: relative; overflow: hidden; }
.btn::before { content: ""; position: absolute; top: 50%; left: 50%; width: 0; height: 0; border-radius: 50%; background: rgba(255, 255, 255, 0.1); transition: width .4s ease, height .4s ease, top .4s ease, left .4s ease; }
.btn:hover::before { width: 300px; height: 300px; top: -150px; left: -150px; }
.btn-primary { background: linear-gradient(135deg, var(--accent), var(--accent2)); color: #ffffff; border-color: transparent; box-shadow: 0 8px 24px rgba(0, 217, 255, 0.3); }
.btn-outline { background: transparent; color: var(--text); border-color: var(--accent); }
.btn:hover { filter: brightness(1.2); transform: translateY(-1px); }
.btn-large { padding: 16px 40px; font-size: 18px; }
.btn-submit { width: 100%; padding: 16px; font-size: 18px; cursor: pointer; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); padding: 24px 0; }
.footer-inner { display: flex; align-items: center; justify-content: center; }
.copyright { color: var(--muted); }

/* Modern extras */
.nav a { position: relative; }
.nav a::after { content: ""; position: absolute; left: 0; bottom: -4px; width: 0; height: 2px; background: linear-gradient(90deg, var(--accent), var(--accent2)); transition: width .3s ease; }
.nav a:hover::after { width: 100%; }
.btn:focus-visible { outline: 3px solid rgba(0, 217, 255, 0.4); outline-offset: 2px; }
.section-title { letter-spacing: 0.02em; font-weight: 700; }

/* Contact Section */
.contact-section { padding: 60px 0; text-align: center; background: linear-gradient(180deg, transparent, rgba(0, 217, 255, 0.03)); }
.contact-section .container { max-width: 600px; }

/* Contact Page */
.contact-page { min-height: 100vh; display: flex; align-items: center; padding: 40px 0; background: var(--bg); }
.contact-page .container { max-width: 600px; }
.contact-header { text-align: center; margin-bottom: 40px; }
.contact-header h1 { font-size: clamp(28px, 5vw, 40px); margin: 0 0 16px; background: linear-gradient(135deg, var(--text), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.contact-header p { color: var(--muted); }

.contact-form { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 32px; box-shadow: 0 4px 16px rgba(0,0,0,0.06); }
.form-group { margin-bottom: 24px; }
.form-group label { display: block; margin-bottom: 8px; font-weight: 600; color: var(--text); }
.form-group input,
.form-group textarea { width: 100%; padding: 12px 16px; border: 1px solid var(--border); border-radius: 8px; font-size: 16px; font-family: inherit; transition: all .3s ease; background: var(--bg); color: var(--text); }
.form-group input:focus,
.form-group textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(0, 217, 255, 0.1); }
.form-group textarea { resize: vertical; min-height: 150px; }

.required { color: #ff4444; font-size: 12px; font-weight: 400; }
.optional { color: var(--muted); font-size: 12px; font-weight: 400; }

.success-message { text-align: center; background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 48px 32px; box-shadow: 0 4px 16px rgba(0,0,0,0.06); }
.success-message h2 { margin: 0 0 16px; color: var(--accent); }
.success-message p { color: var(--muted); line-height: 1.8; }