/* =====================================================
   FREE LABO 共通スタイルシート
   ===================================================== */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;700&display=swap');

/* =====================================================
   CSS カスタムプロパティ
   ===================================================== */
:root {
  --color-primary: #1A4F8A;
  --color-primary-light: #2463a8;
  --color-primary-dark: #133d6e;
  --color-accent: #2980b9;
  --color-bg: #ffffff;
  --color-bg-gray: #f7f8fa;
  --color-bg-dark: #1e2b3c;
  --color-text: #333333;
  --color-text-light: #666666;
  --color-text-muted: #999999;
  --color-border: #e0e4ea;
  --color-line: #06c755;
  --font-family: 'Noto Sans JP', 'ヒラギノ角ゴ ProN', 'Hiragino Kaku Gothic ProN', Meiryo, sans-serif;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow: 0 2px 12px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.1);
  --transition: 0.2s ease;
  --max-width: 1100px;
}

/* =====================================================
   リセット・Base
   ===================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-primary-light);
}

ul {
  list-style: none;
}

/* =====================================================
   コンテナ
   ===================================================== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* =====================================================
   セクション共通
   ===================================================== */
section {
  padding: 72px 0;
}

.section-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  display: block;
  margin-bottom: 8px;
}

.section-title {
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.4;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 0.95rem;
  color: var(--color-text-light);
  max-width: 600px;
  line-height: 1.8;
}

.section-header {
  margin-bottom: 48px;
}

.section-header.center {
  text-align: center;
}

.section-header.center .section-subtitle {
  margin: 0 auto;
}

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

/* =====================================================
   ボタン
   ===================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius);
  font-family: var(--font-family);
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  border: none;
  white-space: nowrap;
  line-height: 1.4;
}

.btn-primary {
  background: var(--color-primary);
  color: #ffffff;
}

.btn-primary:hover {
  background: var(--color-primary-light);
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(26, 79, 138, 0.25);
}

.btn-line {
  background: var(--color-line);
  color: #ffffff;
}

.btn-line:hover {
  background: #05b54c;
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(6, 199, 85, 0.3);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: #ffffff;
  transform: translateY(-1px);
}

.btn-lg {
  padding: 17px 36px;
  font-size: 1.05rem;
}

.btn-full {
  width: 100%;
  text-align: center;
}

.btn-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* =====================================================
   CTA グループ
   ===================================================== */
.cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

/* =====================================================
   ナビゲーション
   ===================================================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.97);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(8px);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.nav-logo {
  display: flex;
  flex-direction: column;
  text-decoration: none;
}

.nav-logo-main {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
}

.nav-logo-sub {
  font-size: 0.65rem;
  color: var(--color-text-light);
  font-weight: 400;
  letter-spacing: 0.05em;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-menu a {
  font-size: 0.88rem;
  color: var(--color-text);
  font-weight: 500;
  transition: color var(--transition);
}

.nav-menu a:hover {
  color: var(--color-primary);
}

.nav-cta {
  display: flex;
  gap: 8px;
}

.nav-cta .btn {
  padding: 8px 16px;
  font-size: 0.82rem;
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}

.nav-hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: all 0.3s;
  transform-origin: center;
}

.nav-hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-hamburger.active span:nth-child(2) {
  opacity: 0;
}

.nav-hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav-mobile-menu {
  display: none;
  background: #fff;
  border-top: 1px solid var(--color-border);
  padding: 16px 24px;
}

.nav-mobile-menu.open {
  display: block;
}

.nav-mobile-menu a {
  display: block;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.95rem;
  color: var(--color-text);
  font-weight: 500;
}

.nav-mobile-menu a:last-child {
  border-bottom: none;
}

.nav-mobile-btns {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 16px;
}

.nav-mobile-btns .btn {
  width: 100%;
  justify-content: center;
}

/* =====================================================
   フッター
   ===================================================== */
.footer {
  background: var(--color-bg-dark);
  color: #c8d0dc;
  padding: 56px 0 24px;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand .footer-logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

.footer-brand p {
  font-size: 0.82rem;
  line-height: 1.7;
  color: #8fa3bb;
}

.footer-links h4 {
  font-size: 0.82rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.footer-links ul li {
  margin-bottom: 10px;
}

.footer-links ul li a {
  font-size: 0.85rem;
  color: #8fa3bb;
  transition: color var(--transition);
}

.footer-links ul li a:hover {
  color: #fff;
}

.footer-contact h4 {
  font-size: 0.82rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.footer-contact-btns {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 16px;
}

.footer-contact-btns .btn {
  font-size: 0.82rem;
  padding: 10px 16px;
  justify-content: center;
}

.footer-mail-link {
  font-size: 0.78rem;
  color: #8fa3bb;
}

.footer-mail-link a {
  color: #8fa3bb;
}

.footer-mail-link a:hover {
  color: #fff;
}

.footer-bottom {
  border-top: 1px solid #2d3d52;
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom small {
  font-size: 0.78rem;
  color: #8fa3bb;
}

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

.footer-bottom-links a {
  font-size: 0.78rem;
  color: #8fa3bb;
}

.footer-bottom-links a:hover {
  color: #fff;
}

/* =====================================================
   ページトップ余白（fixed nav分）
   ===================================================== */
.page-top-offset {
  padding-top: 64px;
}

/* =====================================================
   ページヘッダー（内部ページ用）
   ===================================================== */
.page-header {
  background: var(--color-primary);
  color: #fff;
  padding: 56px 24px;
  text-align: center;
}

.page-header h1 {
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  font-weight: 700;
  margin-bottom: 8px;
}

.page-header p {
  font-size: 0.95rem;
  opacity: 0.85;
}

/* =====================================================
   カードグリッド
   ===================================================== */
.card-grid {
  display: grid;
  gap: 20px;
}

.card-grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.card-grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.card-grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: box-shadow var(--transition), transform var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card-icon {
  width: 44px;
  height: 44px;
  background: #eef3fb;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  color: var(--color-primary);
  font-size: 1.4rem;
}

.card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.card-text {
  font-size: 0.88rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* =====================================================
   FAQアコーディオン
   ===================================================== */
.faq-list {
  max-width: 780px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 20px 0;
  background: none;
  border: none;
  font-family: var(--font-family);
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--color-text);
  cursor: pointer;
  text-align: left;
  gap: 16px;
  transition: color var(--transition);
}

.faq-question:hover {
  color: var(--color-primary);
}

.faq-question .faq-q-label {
  color: var(--color-primary);
  font-size: 1.1rem;
  flex-shrink: 0;
}

.faq-question-text {
  flex: 1;
}

.faq-icon {
  width: 20px;
  height: 20px;
  position: relative;
  flex-shrink: 0;
}

.faq-icon::before,
.faq-icon::after {
  content: '';
  position: absolute;
  background: var(--color-primary);
  transition: transform 0.3s;
}

.faq-icon::before {
  width: 16px;
  height: 2px;
  top: 9px;
  left: 2px;
}

.faq-icon::after {
  width: 2px;
  height: 16px;
  top: 2px;
  left: 9px;
}

.faq-item.open .faq-icon::after {
  transform: rotate(90deg);
}

.faq-answer {
  display: none;
  padding: 0 0 20px 28px;
  font-size: 0.92rem;
  color: var(--color-text-light);
  line-height: 1.8;
}

.faq-answer.open {
  display: block;
  animation: fadeIn 0.2s ease;
}

/* =====================================================
   テーブル（会社概要）
   ===================================================== */
.info-table {
  width: 100%;
  border-collapse: collapse;
}

.info-table th,
.info-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.93rem;
  text-align: left;
  vertical-align: top;
}

.info-table th {
  width: 180px;
  font-weight: 700;
  color: var(--color-primary);
  background: #f0f4fa;
  white-space: nowrap;
}

.info-table td {
  color: var(--color-text);
  line-height: 1.7;
}

/* =====================================================
   バッジ・タグ
   ===================================================== */
.badge {
  display: inline-block;
  background: #eef3fb;
  color: var(--color-primary);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 4px;
}

/* =====================================================
   お悩みカード
   ===================================================== */
.trouble-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.trouble-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius);
  padding: 20px 18px;
  font-size: 0.92rem;
  color: var(--color-text);
  font-weight: 500;
  line-height: 1.6;
}

/* =====================================================
   強みカード
   ===================================================== */
.strength-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.strength-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  box-shadow: var(--shadow);
}

.strength-num {
  font-size: 2rem;
  font-weight: 900;
  color: var(--color-primary);
  opacity: 0.15;
  line-height: 1;
  margin-bottom: 12px;
}

.strength-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.strength-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.strength-text {
  font-size: 0.87rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* =====================================================
   対応業種・エリア
   ===================================================== */
.coverage-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.coverage-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
}

.coverage-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-primary);
}

.coverage-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.coverage-tag {
  background: #eef3fb;
  color: var(--color-primary);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
}

.area-row {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 12px;
  font-size: 0.9rem;
}

.area-label {
  font-weight: 700;
  min-width: 90px;
  color: var(--color-text);
}

/* =====================================================
   事例カード
   ===================================================== */
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.case-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
}

.case-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.case-card-image {
  background: var(--color-bg-gray);
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
}

.case-card-body {
  padding: 20px;
}

.case-tag {
  display: inline-block;
  background: #eef3fb;
  color: var(--color-primary);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
  margin-bottom: 8px;
}

.case-title {
  font-size: 0.93rem;
  font-weight: 700;
  color: var(--color-text);
}

/* =====================================================
   最終CTA セクション
   ===================================================== */
.cta-section {
  background: var(--color-primary);
  color: #fff;
  text-align: center;
  padding: 80px 24px;
}

.cta-section .section-label {
  color: rgba(255,255,255,0.7);
}

.cta-section .section-title {
  color: #fff;
  margin-bottom: 12px;
}

.cta-section .section-subtitle {
  color: rgba(255,255,255,0.85);
  margin: 0 auto 32px;
  max-width: 520px;
}

.cta-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-bottom: 20px;
}

.cta-section .btn-outline {
  border-color: rgba(255,255,255,0.6);
  color: #fff;
}

.cta-section .btn-outline:hover {
  background: rgba(255,255,255,0.2);
  border-color: #fff;
}

.cta-mail {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.7);
}

.cta-mail a {
  color: rgba(255,255,255,0.85);
  text-decoration: underline;
}

/* =====================================================
   AI管理部セクション
   ===================================================== */
.ai-section {
  background: var(--color-bg-dark);
  color: #fff;
  padding: 80px 0;
}

.ai-section .section-label {
  color: rgba(255,255,255,0.5);
}

.ai-section .section-title {
  color: #fff;
}

.ai-section .section-subtitle {
  color: rgba(255,255,255,0.75);
}

.ai-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.ai-text .section-title {
  margin-bottom: 20px;
}

.ai-features {
  margin: 24px 0;
}

.ai-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 14px;
  font-size: 0.92rem;
  color: rgba(255,255,255,0.85);
  line-height: 1.6;
}

.ai-feature-item::before {
  content: '✓';
  color: #5bc8f5;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}

.ai-note {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.5);
  margin-top: 16px;
}

.ai-img {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 8px 40px rgba(0,0,0,0.3);
}

.ai-img img {
  width: 100%;
  height: 320px;
  object-fit: cover;
}

.ai-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

/* =====================================================
   ヒーローセクション
   ===================================================== */
.hero {
  min-height: calc(100vh - 64px);
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #f7f8fa 0%, #eef3fb 100%);
  padding: 64px 0;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.hero-label {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--color-primary);
  display: block;
  margin-bottom: 16px;
}

.hero-title {
  font-size: clamp(1.5rem, 3.5vw, 2.2rem);
  font-weight: 700;
  line-height: 1.45;
  color: var(--color-text);
  margin-bottom: 16px;
}

.hero-title span {
  color: var(--color-primary);
}

.hero-subtitle {
  font-size: 0.97rem;
  color: var(--color-text-light);
  margin-bottom: 12px;
  line-height: 1.8;
}

.hero-note {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 32px;
  line-height: 1.7;
}

.hero-img {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.hero-img img {
  width: 100%;
  height: 420px;
  object-fit: cover;
}

/* =====================================================
   サービスカテゴリ詳細（サービスページ）
   ===================================================== */
.service-detail {
  padding: 72px 0;
  border-bottom: 1px solid var(--color-border);
}

.service-detail:last-of-type {
  border-bottom: none;
}

.service-detail-inner {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 52px;
  align-items: start;
}

.service-detail-left .service-num {
  font-size: 3rem;
  font-weight: 900;
  color: var(--color-primary);
  opacity: 0.12;
  line-height: 1;
  font-family: sans-serif;
}

.service-detail-left h2 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.service-detail-left .badge {
  margin-top: 8px;
}

.service-detail-right p {
  font-size: 0.95rem;
  color: var(--color-text-light);
  line-height: 1.85;
  margin-bottom: 24px;
}

.service-items {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

.service-item {
  background: var(--color-bg-gray);
  border-radius: var(--radius);
  padding: 14px 16px;
  font-size: 0.88rem;
  color: var(--color-text);
  display: flex;
  align-items: flex-start;
  gap: 8px;
  line-height: 1.5;
}

.service-item::before {
  content: '▶';
  color: var(--color-primary);
  font-size: 0.68rem;
  flex-shrink: 0;
  margin-top: 3px;
}

/* =====================================================
   お問い合わせページ
   ===================================================== */
.contact-box {
  max-width: 640px;
  margin: 0 auto;
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  box-shadow: var(--shadow);
}

.contact-box h2 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.contact-box .lead {
  font-size: 0.95rem;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 32px;
}

.contact-btns {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 28px;
}

.contact-btns .btn {
  font-size: 1rem;
  padding: 18px 24px;
}

.contact-divider {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.82rem;
  margin: 4px 0;
}

.contact-mail-box {
  background: var(--color-bg-gray);
  border-radius: var(--radius);
  padding: 16px 20px;
  text-align: center;
}

.contact-mail-box p {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin-bottom: 4px;
}

.contact-mail-box a {
  font-size: 0.95rem;
  color: var(--color-primary);
  font-weight: 500;
}

/* =====================================================
   プライバシーポリシー
   ===================================================== */
.privacy-content {
  max-width: 780px;
  margin: 0 auto;
  padding: 60px 24px;
}

.privacy-content h2 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin: 40px 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.privacy-content p {
  font-size: 0.93rem;
  color: var(--color-text-light);
  line-height: 1.85;
  margin-bottom: 12px;
}

.privacy-content ul {
  margin: 12px 0 12px 20px;
}

.privacy-content ul li {
  list-style: disc;
  font-size: 0.93rem;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 6px;
}

.privacy-updated {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin-bottom: 32px;
}

/* =====================================================
   フェードインアニメーション
   ===================================================== */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in {
  animation: fadeIn 0.5s ease forwards;
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* =====================================================
   レスポンシブ（スマホ）
   ===================================================== */
@media (max-width: 768px) {
  section {
    padding: 52px 0;
  }

  .nav-menu,
  .nav-cta {
    display: none;
  }

  .nav-hamburger {
    display: flex;
  }

  .hero {
    min-height: auto;
    padding: 40px 0;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hero-img {
    order: -1;
  }

  .hero-img img {
    height: 240px;
  }

  .hero-title {
    font-size: 1.4rem;
  }

  .trouble-grid {
    grid-template-columns: 1fr;
  }

  .card-grid-2,
  .card-grid-3,
  .card-grid-4 {
    grid-template-columns: 1fr;
  }

  .strength-grid {
    grid-template-columns: 1fr;
  }

  .coverage-grid {
    grid-template-columns: 1fr;
  }

  .case-grid {
    grid-template-columns: 1fr;
  }

  .ai-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .ai-img {
    order: -1;
  }

  .ai-img img {
    height: 220px;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .service-detail-inner {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .service-items {
    grid-template-columns: 1fr;
  }

  .contact-box {
    padding: 32px 20px;
  }

  .info-table th {
    width: 120px;
    font-size: 0.82rem;
  }

  .info-table td {
    font-size: 0.88rem;
  }

  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }

  .cta-buttons .btn {
    width: 100%;
    max-width: 360px;
  }

  .cta-group {
    flex-direction: column;
    align-items: flex-start;
  }

  .cta-group .btn {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .section-title {
    font-size: 1.25rem;
  }

  .btn {
    padding: 14px 20px;
    font-size: 0.92rem;
  }

  .btn-lg {
    padding: 16px 24px;
    font-size: 0.98rem;
  }

  .info-table {
    display: block;
    overflow-x: auto;
  }
}