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

/* --- デザインシステム変数 --- */
:root {
  --bg-color: #FFFFFF;
  --primary-color: #5BA8F5;
  --secondary-color: #EAF5FF;
  --heading-color: #1D4E89;
  --text-color: #2D3748;
  --text-light: #718096;
  --border-color: #E2E8F0;
  --card-shadow: 0 10px 30px rgba(29, 78, 137, 0.06);
  --card-hover-shadow: 0 20px 40px rgba(29, 78, 137, 0.12);
  --radius-lg: 16px;
  --radius-md: 12px;
  
  /* Before / After 用カラー */
  --before-bg: #F7FAFC;
  --before-border: #E2E8F0;
  --before-accent: #E53E3E;
  --after-bg: #F0F7FF;
  --after-border: #BEE3F8;
  --after-accent: #3182CE;
}

/* --- リセット＆グローバルスタイル --- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, "Helvetica Neue", YuGothic, "ヒラギノ角ゴ ProN W3", Meiryo, sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-color);
  background-color: var(--bg-color);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

/* --- レイアウト＆コンテナ --- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 130px 0;
  position: relative;
  width: 100%;
}

/* セクション背景バリエーション */
.bg-light {
  background-color: var(--secondary-color);
}

.bg-dark {
  background-color: var(--heading-color);
  color: #FFFFFF;
}

/* --- タイポグラフィ --- */
.section-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--heading-color);
  text-align: center;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.section-title.white {
  color: #FFFFFF;
}

/* 長い文章でも1行に収まるよう、PC版ではmax-widthを980pxに拡張 */
.section-desc {
  font-size: 18px;
  color: var(--text-light);
  text-align: center;
  max-width: 980px;
  margin: 0 auto 60px;
  word-break: keep-all;
  overflow-wrap: anywhere;
}

.section-desc.white {
  color: #EAF5FF;
}

/* --- ボタンコンポーネント --- */
.btn-group {
  display: flex;
  gap: 16px;
  justify-content: flex-start;
  align-items: center;
  flex-wrap: wrap;
}

.btn-group.center {
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 32px;
  font-size: 16px;
  font-weight: 700;
  border-radius: var(--radius-lg);
  transition: all 0.3s ease;
  cursor: pointer;
  border: 2px solid transparent;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  text-align: center;
}

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

.btn-primary:hover {
  background-color: #4a96e2;
  transform: translateY(-2px);
  box-shadow: 0 6px 12px rgba(91, 168, 245, 0.3);
}

.btn-secondary {
  background-color: #FFFFFF;
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.btn-secondary:hover {
  background-color: var(--secondary-color);
  transform: translateY(-2px);
  box-shadow: 0 6px 12px rgba(91, 168, 245, 0.1);
}

/* トライアル申込・資料請求用強調ボタン */
.btn-large {
  padding: 18px 40px;
  font-size: 17px;
}

.btn-accent {
  background-color: #FF9F43;
  color: #FFFFFF;
}

.btn-accent:hover {
  background-color: #ee8c2b;
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(255, 159, 67, 0.4);
}

/* --- ヘッダー (Header) --- */
header {
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  height: 80px;
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
}

.logo img {
  height: 48px;
  width: auto;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-item {
  font-size: 15px;
  font-weight: 500;
  color: var(--heading-color);
  transition: color 0.2s ease;
}

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

.header-btn-group {
  display: flex;
  gap: 12px;
}

/* --- ファーストビュー (First View) --- */
.hero {
  position: relative;
  padding: 100px 0 120px;
  background: radial-gradient(circle at top right, rgba(91, 168, 245, 0.15) 0%, rgba(255, 255, 255, 0) 55%);
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 50px;
  align-items: center;
}

.hero-content {
  max-width: 620px;
}

.hero-tag {
  display: inline-block;
  background-color: var(--secondary-color);
  color: var(--heading-color);
  padding: 8px 20px;
  font-size: 14px;
  font-weight: 700;
  border-radius: 50px;
  margin-bottom: 24px;
}

.hero-title {
  font-size: 44px;
  line-height: 1.4;
  font-weight: 700;
  color: var(--heading-color);
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.hero-desc {
  font-size: 18px;
  line-height: 1.8;
  color: var(--text-light);
  margin-bottom: 40px;
}

.hero-visual {
  position: relative;
  width: 100%;
  height: 480px;
}

/* モックアップと人物写真の重ね合わせ */
.mockup-wrapper {
  position: absolute;
  top: 0;
  left: 0;
  width: 85%;
  z-index: 2;
  background-color: #FFFFFF;
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 40px rgba(29, 78, 137, 0.1);
  border: 1px solid var(--border-color);
  overflow: hidden;
  padding: 12px;
  transition: transform 0.3s ease;
}

.mockup-wrapper:hover {
  transform: translateY(-5px);
}

.mockup-header {
  display: flex;
  gap: 6px;
  margin-bottom: 10px;
  padding-left: 4px;
}

.mockup-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: #CBD5E0;
}

.mockup-dot:nth-child(1) { background-color: #FF5F56; }
.mockup-dot:nth-child(2) { background-color: #FFBD2E; }
.mockup-dot:nth-child(3) { background-color: #27C93F; }

.mockup-screen {
  background-color: #F4F8FC;
  border-radius: var(--radius-md);
  padding: 16px 20px 20px;
  border: 1px solid var(--border-color);
}

.dashboard-title-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.dashboard-app-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--heading-color);
}

.dashboard-tag.blue {
  background-color: #DCEEFF;
  color: var(--heading-color);
  font-size: 12px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 6px;
}

.dashboard-subtitle-bar {
  font-size: 14px;
  font-weight: 700;
  color: var(--heading-color);
  margin-top: 14px;
  margin-bottom: 8px;
}

.dashboard-widget-card {
  background-color: #FFFFFF;
  border-radius: 10px;
  padding: 4px;
  border: 1px solid #E2E8F0;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
  overflow: hidden;
}

.dashboard-widget-card img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 6px;
}

.dashboard-widget-card.zoom-approval {
  overflow: hidden;
  position: relative;
}

.dashboard-widget-card.zoom-approval img {
  width: 122%;
  max-width: none;
  display: block;
  border-radius: 6px;
  transform: translateX(-1%);
}

.photo-wrapper {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 48%;
  height: 72%;
  z-index: 3;
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.15);
  overflow: hidden;
  border: 4px solid #FFFFFF;
}

.photo-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* --- セクション1：共感（お悩み） --- */
.problem-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 20px;
}

.problem-card {
  background-color: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  border: 1px solid var(--border-color);
  box-shadow: var(--card-shadow);
  text-align: center;
  transition: all 0.3s ease;
}

.problem-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--card-hover-shadow);
  border-color: rgba(91, 168, 245, 0.3);
}

.problem-icon-wrapper {
  width: 64px;
  height: 64px;
  background-color: #FFEBEB;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
}

.problem-icon {
  width: 32px;
  height: 32px;
  fill: #E53E3E;
}

.problem-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--heading-color);
  margin-bottom: 12px;
}

.problem-text {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.6;
}

/* --- セクション2：放置リスク (高さを揃えて文字量差による崩れを防止) --- */
.risk-flow {
  display: flex;
  justify-content: space-between;
  align-items: stretch; /* 高さの自動統一 */
  max-width: 1100px;
  margin: 0 auto;
  gap: 16px;
}

.risk-step {
  flex: 1;
  background-color: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 28px 10px;
  border: 1px solid var(--border-color);
  box-shadow: var(--card-shadow);
  text-align: center;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center; /* 縦方向中央揃え */
  align-items: center;
}

.risk-step-num {
  position: absolute;
  top: -15px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--heading-color);
  color: #FFFFFF;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
}

.risk-step-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--heading-color);
  line-height: 1.6;
  white-space: nowrap;
}

.risk-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
}

.risk-arrow svg {
  width: 24px;
  height: 24px;
  fill: var(--primary-color);
}

.risk-image-box {
  max-width: 760px;
  margin: 40px auto 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--card-shadow);
  border: 4px solid #FFFFFF;
}

.risk-image-box img {
  width: 100%;
  height: auto;
  display: block;
}

.risk-summary-card {
  max-width: 800px;
  margin: 50px auto 0;
  background: #FFF5F5;
  border: 1px dashed #FEB2B2;
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
  font-weight: 700;
  color: #C53030;
  font-size: 18px;
}

/* --- セクション3：解決（機能紹介） (5枚で美しく中央寄せするフレックスボックス設計) --- */
.solution-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 32px;
  margin-top: 40px;
}

.solution-card {
  background-color: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  border: 1px solid var(--border-color);
  box-shadow: var(--card-shadow);
  transition: all 0.3s ease;
  width: calc(33.333% - 22px);
  min-width: 310px;
}

.solution-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--card-hover-shadow);
  border-color: rgba(91, 168, 245, 0.4);
}

.solution-icon-wrapper {
  width: 60px;
  height: 60px;
  background-color: var(--secondary-color);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.solution-icon {
  width: 30px;
  height: 30px;
  fill: var(--primary-color);
}

.solution-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--heading-color);
  margin-bottom: 16px;
}

.solution-text {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.7;
}

/* --- セクション4：活用事例 (一行調整) --- */
.usecase-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.usecase-card {
  background-color: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  border: 1px solid var(--border-color);
  box-shadow: var(--card-shadow);
  display: flex;
  gap: 16px;
  align-items: flex-start;
  transition: all 0.3s ease;
}

.usecase-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--card-hover-shadow);
  border-color: var(--primary-color);
}

.usecase-icon-wrapper {
  width: 48px;
  height: 48px;
  background-color: var(--secondary-color);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.usecase-icon {
  width: 24px;
  height: 24px;
  fill: var(--primary-color);
}

.usecase-info h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--heading-color);
  margin-bottom: 8px;
}

.usecase-info p {
  font-size: 13.5px;
  color: var(--text-light);
  line-height: 1.6;
}

/* --- セクション5：Before / After (高さを揃えて一行に収める) --- */
.compare-container {
  display: grid;
  grid-template-columns: 1fr 60px 1fr;
  align-items: stretch;
  gap: 20px;
  margin-top: 40px;
}

.compare-card {
  border-radius: var(--radius-lg);
  padding: 48px 36px;
  box-shadow: var(--card-shadow);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.compare-card.before {
  background-color: var(--before-bg);
  border: 1px solid var(--before-border);
}

.compare-card.after {
  background-color: var(--after-bg);
  border: 2px solid var(--after-border);
}

.compare-badge {
  display: inline-block;
  padding: 6px 16px;
  font-size: 14px;
  font-weight: 700;
  border-radius: 50px;
  margin-bottom: 28px;
  align-self: flex-start;
}

.compare-card.before .compare-badge {
  background-color: #FED7D7;
  color: var(--before-accent);
}

.compare-card.after .compare-badge {
  background-color: #BEE3F8;
  color: var(--after-accent);
}

.compare-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  flex-grow: 1;
  justify-content: space-between;
}

.compare-item {
  display: flex;
  gap: 12px;
  align-items: center;
}

.compare-item-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 13px;
}

.compare-card.before .compare-item-icon {
  background-color: #FEB2B2;
  color: var(--before-accent);
  font-weight: 700;
}

.compare-card.after .compare-item-icon {
  background-color: #90CDF4;
  color: var(--after-accent);
  font-weight: 700;
}

.compare-item-text {
  font-size: 15px;
  font-weight: 500;
  white-space: nowrap;
}

.compare-card.before .compare-item-text {
  color: #4A5568;
}

.compare-card.after .compare-item-text {
  color: var(--heading-color);
  font-weight: 700;
}

.compare-arrow-mid {
  display: flex;
  justify-content: center;
  align-items: center;
}

.compare-arrow-mid svg {
  width: 48px;
  height: 48px;
  fill: var(--primary-color);
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.05));
}

/* --- セクション6：AI比較 --- */
.ai-intro {
  text-align: center;
  background-color: var(--secondary-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  max-width: 900px;
  margin: 0 auto 60px;
  border: 1px solid rgba(91, 168, 245, 0.2);
}

.ai-intro p {
  font-size: 17px;
  color: var(--heading-color);
  font-weight: 500;
  line-height: 1.8;
}

.ai-challenges {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  margin-bottom: 60px;
}

.ai-challenge-card {
  background-color: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid var(--border-color);
  box-shadow: var(--card-shadow);
  position: relative;
}

.ai-challenge-badge {
  position: absolute;
  top: -15px;
  left: 24px;
  background-color: #FF9F43;
  color: #FFFFFF;
  padding: 2px 12px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 700;
}

.ai-challenge-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--heading-color);
  margin-bottom: 16px;
  margin-top: 8px;
}

.ai-challenge-quote {
  background-color: #F7FAFC;
  border-left: 4px solid var(--primary-color);
  padding: 12px 16px;
  font-size: 14px;
  font-style: italic;
  margin-bottom: 16px;
  color: var(--text-light);
}

.ai-challenge-text {
  font-size: 15px;
  line-height: 1.7;
}

/* 比較表の上の見出し */
.table-section-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--heading-color);
  text-align: center;
  margin-bottom: 30px;
}

/* 比較テーブル */
.table-wrapper {
  max-width: 900px;
  margin: 0 auto 60px;
  background-color: #FFFFFF;
  border-radius: var(--radius-lg);
  box-shadow: var(--card-shadow);
  border: 1px solid var(--border-color);
  overflow-x: auto;
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 780px;
}

.compare-table th, .compare-table td {
  padding: 24px;
  border-bottom: 1px solid var(--border-color);
  vertical-align: middle;
}

.compare-table tr:last-child th, .compare-table tr:last-child td {
  border-bottom: none;
}

.compare-table th:first-child,
.compare-table tbody th {
  width: 28%;
  min-width: 210px;
  font-weight: 700;
  color: var(--heading-color);
  background-color: #F7FAFC;
  font-size: 15px;
  line-height: 1.6;
  white-space: nowrap;
}

.compare-table .col-ai {
  width: 36%;
  background-color: #FCFDFE;
  font-size: 15px;
}

.compare-table .col-pigeon {
  width: 36%;
  background-color: #F5FAFF;
  border-left: 2px solid rgba(91, 168, 245, 0.2);
  font-size: 15px;
}

.table-header th {
  font-size: 18px;
  text-align: center;
  padding: 28px 24px;
}

.table-header th:first-child {
  font-size: 16px;
  text-align: left;
}

.table-header .col-ai {
  color: var(--text-light);
}

.table-header .col-pigeon {
  color: var(--heading-color);
  background-color: var(--secondary-color);
  border-left: 2px solid rgba(91, 168, 245, 0.3);
}

.table-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 500;
}

.table-item.pigeon {
  color: var(--heading-color);
  font-weight: 700;
}

.table-icon {
  width: 20px;
  height: 20px;
  fill: var(--primary-color);
  flex-shrink: 0;
}

.table-icon.gray {
  fill: var(--text-light);
}

/* 締めメッセージ */
.conclusion-card {
  max-width: 900px;
  margin: 0 auto;
  background: linear-gradient(135deg, var(--secondary-color) 0%, #FFFFFF 100%);
  border: 2px solid var(--primary-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  text-align: center;
  box-shadow: var(--card-shadow);
}

.conclusion-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--heading-color);
  line-height: 1.6;
}

.conclusion-sub {
  font-size: 15px;
  color: var(--text-light);
  margin-top: 12px;
}

/* --- セクション7：導入ステップ --- */
.step-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.step-card {
  background-color: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  border: 1px solid var(--border-color);
  box-shadow: var(--card-shadow);
  position: relative;
  transition: all 0.3s ease;
}

.step-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--card-hover-shadow);
  border-color: var(--primary-color);
}

.step-number {
  font-size: 48px;
  font-weight: 700;
  color: var(--secondary-color);
  line-height: 1;
  margin-bottom: 16px;
}

.step-card:hover .step-number {
  color: rgba(91, 168, 245, 0.3);
}

.step-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--heading-color);
  margin-bottom: 12px;
}

.step-text {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.6;
}

/* --- FAQセクション --- */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background-color: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--card-shadow);
  transition: border-color 0.2s ease;
}

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

.faq-question {
  width: 100%;
  background: none;
  border: none;
  padding: 24px;
  text-align: left;
  font-size: 16px;
  font-weight: 700;
  color: var(--heading-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  outline: none;
}

.faq-icon-toggle {
  width: 24px;
  height: 24px;
  position: relative;
  transition: transform 0.3s ease;
}

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

.faq-icon-toggle::before {
  top: 11px;
  left: 4px;
  width: 16px;
  height: 2px;
}

.faq-icon-toggle::after {
  top: 4px;
  left: 11px;
  width: 2px;
  height: 16px;
}

.faq-item.active .faq-icon-toggle {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
  background-color: #FAFBFD;
}

.faq-answer-content {
  padding: 0 24px 24px;
  font-size: 15px;
  color: var(--text-color);
  border-top: 1px solid #F7FAFC;
  line-height: 1.8;
}

/* --- 最終CTAセクション --- */
.final-cta {
  text-align: center;
  padding: 120px 0;
  background: radial-gradient(circle at top, #235fa7 0%, var(--heading-color) 100%);
}

.final-cta .btn-group {
  margin-top: 40px;
}



/* --- フッター (Footer) --- */
footer {
  background-color: #FAFBFD;
  border-top: 1px solid var(--border-color);
  padding: 60px 0 30px;
  color: var(--text-light);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 60px;
}

.footer-brand img {
  height: 40px;
  margin-bottom: 20px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.6;
}

.footer-links h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--heading-color);
  margin-bottom: 20px;
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  font-size: 14px;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: var(--primary-color);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
}

/* --- モバイルレスポンシブ --- */
@media (max-width: 1024px) {
  .problem-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .solution-grid {
    width: 100%;
  }
  .solution-card {
    width: calc(50% - 16px);
  }
  
  .usecase-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .step-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .compare-container {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  
  .compare-arrow-mid {
    transform: rotate(90deg);
    padding: 10px 0;
  }
  
  .compare-item-text {
    white-space: normal;
  }
}

@media (max-width: 768px) {
  section {
    padding: 80px 0;
  }
  
  .section-title {
    font-size: 26px;
  }
  
  .section-desc {
    font-size: 15px;
    margin-bottom: 40px;
  }
  
  header {
    height: 70px;
  }
  
  .nav-menu {
    display: none;
  }
  
  .hero {
    padding: 60px 0 80px;
  }
  
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .hero-content {
    text-align: center;
    max-width: 100%;
  }
  
  .hero-title {
    font-size: 28px;
  }
  
  .hero-desc {
    font-size: 15px;
  }
  
  .btn-group {
    justify-content: center;
    flex-direction: column;
    width: 100%;
  }
  
  .btn {
    width: 100%;
  }
  
  .hero-visual {
    height: 350px;
  }
  
  .mockup-wrapper {
    width: 90%;
  }
  
  .photo-wrapper {
    width: 55%;
    height: 75%;
  }
  
  .problem-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .solution-card {
    width: 100%;
  }
  
  .risk-flow {
    flex-direction: column;
    gap: 12px;
    align-items: stretch;
  }
  
  .risk-arrow {
    transform: rotate(90deg);
    padding: 8px 0;
  }
  
  .risk-step {
    width: 100%;
    padding: 20px 16px;
  }
  
  .usecase-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .ai-challenges {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  .ai-intro {
    padding: 20px;
  }
  
  .compare-table th, .compare-table td {
    padding: 16px 12px;
    font-size: 14px;
  }
  
  .table-header th {
    font-size: 15px;
    padding: 18px 12px;
  }
  
  .conclusion-card {
    padding: 24px;
  }
  
  .conclusion-text {
    font-size: 16px;
  }
  
  .step-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
    margin-bottom: 40px;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}