/* ===== 2025年最新トレンド モダンフラットデザイン CSS ===== */

/* 完全スクロール問題解決 - リセット & ベース設定 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    max-width: 100%;
}

*,
*::before,
*::after {
    box-sizing: border-box;
    max-width: 100%;
}

/* すべての要素に横スクロール防止を適用 */
html, body, div, section, article, aside, header, footer, nav, main,
h1, h2, h3, h4, h5, h6, p, span, a, ul, ol, li, img, video, iframe, embed, object,
.container, .section, .hero, .challenges, .solutions, .strengths, .usecases, .cases, .core-tech, .demo, .faq, .contact-section, .footer {
    /*overflow-x: hidden !important;*/
    max-width: 100% !important;
    box-sizing: border-box !important;
}

/* 特定要素のサイズ制限 */
img, video, iframe, embed, object {
    max-width: 100% !important;
    height: auto !important;
    width: auto !important;
    overflow: hidden !important;
}

/* グリッドや固定幅レイアウトの調整 */
.strengths-container,
.tech-grid,
.challenges-grid,
.solutions-timeline,
.cases-grid,
.usecases-tabs,
.demo-content,
.faq-container,
.contact-form {
    max-width: 100% !important;
    /*overflow-x: hidden !important;*/
    box-sizing: border-box !important;
}

:root {
    /* 2025年カラーパレット */
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #8b5cf6;
    --secondary: #06b6d4;
    --accent: #ec4899;
    --accent-dark: #db2777;
    
    /* ニュートラルカラー */
    --neutral-50: #fafafa;
    --neutral-100: #f5f5f5;
    --neutral-200: #e5e5e5;
    --neutral-300: #d4d4d4;
    --neutral-400: #a3a3a3;
    --neutral-500: #737373;
    --neutral-600: #525252;
    --neutral-700: #404040;
    --neutral-800: #262626;
    --neutral-900: #171717;
    
    /* セマンティックカラー */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #3b82f6;
    
    /* グラデーション */
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
    --gradient-secondary: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
    --gradient-accent: linear-gradient(135deg, #ec4899 0%, #f97316 100%);
    --gradient-neutral: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    
    /* グラスモーフィズム */
    --glass-bg: rgba(255, 255, 255, 0.25);
    --glass-border: rgba(255, 255, 255, 0.18);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    --glass-backdrop: blur(8px);
    
    /* シャドウ */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* スペーシング */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    
    /* 半径 */
    --radius-sm: 0.125rem;
    --radius: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
    --radius-3xl: 1.5rem;
    --radius-full: 9999px;
    
    /* タイポグラフィ */
    --font-family-sans: 'Inter', 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    --font-family-display: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    
    /* アニメーション */
    --transition-fast: 150ms ease-out;
    --transition-base: 250ms ease-out;
    --transition-slow: 350ms ease-out;
    --transition-slower: 500ms ease-out;
    
    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}



/* 完全スクロール問題解決 - ベーススタイル */
html {
    scroll-behavior: smooth;
    font-size: 16px;
    overflow-x: hidden !important;
    overflow-y: auto !important;
    width: 100% !important;
    max-width: 100vw !important;
    min-width: 0 !important;
    box-sizing: border-box !important;
    margin: 0 !important;
    padding: 0 !important;
}

body {
    font-family: var(--font-family-sans);
    font-weight: 400;
    line-height: 1.6;
    color: var(--neutral-900);
    background-color: var(--neutral-50);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden !important;
    overflow-y: auto !important;
    width: 100% !important;
    max-width: 100vw !important;
    min-width: 0 !important;
    margin: 0 !important;
    padding: 0 !important;
    box-sizing: border-box !important;
    min-height: 100vh !important;
}

/* コンテナ完全修正 */
.container {
    width: 100% !important;
    max-width: min(1200px, 100vw) !important;
    min-width: 0 !important;
    margin: 0 auto !important;
    padding: 0 clamp(1rem, 4vw, 1.5rem) !important;
    box-sizing: border-box !important;
    /*overflow-x: hidden !important;*/
}

@media (max-width: 768px) {
    .container {
        padding: 0 clamp(0.75rem, 3vw, 1rem) !important;
        max-width: 100vw !important;
        margin: 0 auto !important;
        width: 100% !important;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 clamp(0.5rem, 2.5vw, 0.75rem) !important;
        max-width: 100vw !important;
        margin: 0 auto !important;
        width: 100% !important;
    }
}

/* タイポグラフィ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-display);
    font-weight: 700;
    line-height: 1.2;
    color: var(--neutral-900);
    letter-spacing: -0.025em;
}

h1 {
    font-size: clamp(1.75rem, 4vw, 3.5rem);
    font-weight: 800;
}

h2 {
    font-size: clamp(1.5rem, 3.5vw, 2.5rem);
}

h3 {
    font-size: clamp(1.125rem, 2.5vw, 1.75rem);
}

h4 {
    font-size: clamp(1rem, 2vw, 1.25rem);
}

p {
    margin-bottom: var(--space-4);
    color: var(--neutral-600);
    font-size: clamp(0.9rem, 2vw, 1.1rem);
    line-height: 1.7;
}

.highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
}

/* ボタン */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-family: var(--font-family-sans);
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.5;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-xl);
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    white-space: nowrap;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left var(--transition-slow);
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: white;
}

.btn-outline {
    background: var(--glass-bg);
    color: var(--primary);
    border: 2px solid var(--primary);
    backdrop-filter: var(--glass-backdrop);
}

.btn-outline:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-large {
    padding: var(--space-4) var(--space-8);
    font-size: 1.125rem;
}

.btn-gradient {
    background: var(--gradient-primary);
    color: white;
    border: none;
    position: relative;
    overflow: hidden;
}

.btn-gradient::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left var(--transition-slow);
}

.btn-gradient:hover::before {
    left: 100%;
}

/* スクロールアニメーション */
.scroll-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

.scroll-reveal.fade-in-up-delay-1 {
    transition-delay: 0.2s;
}

.fade-in-up-delay-1 {
    transition-delay: 0.2s;
}

/* ヘッダー */
.header {
    background: #fff;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    border-bottom: 1px solid var(--neutral-200);
    transition: all var(--transition-base);
    transition: transform 0.3s cubic-bezier(0.4,0,0.2,1);
    will-change: transform;
}

.header--hidden {
    transform: translateY(-100%);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
    text-decoration: none;
}

.logo i {
    font-size: 1.75rem;
}

.nav {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.nav-link {
    position: relative;
    color: var(--neutral-700);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-base);
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-base);
}

.nav-link:hover::after {
    width: 100%;
}




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

/* ===== ヒーローセクション（メインビジュアル） ===== */
.hero {
  position: relative;
  width: 100vw;
  min-height: 100vh;
  background-color: #fff;
  display: flex;
  align-items: center;  /* PC版では中央配置 */
  justify-content: center;
  overflow: visible !important;
  padding: 0 0;
  overflow-x: hidden;
  overflow-y: visible !important;
  margin-bottom: 0 !important;
}

.hero-background-image {
  position: absolute;
  top: 80px;  /* ヘッダー分下げる */
  left: 5%;
  width: 100%;
  height: calc(100% - 80px);  /* ヘッダー分を引いた高さ */
  overflow: hidden;
  margin-top: 0;
  z-index: 1;  /* hero-cardより後ろに配置 */
}

.hero-background-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;  /* PC版では中央を表示 */
}
@media (min-width: 1200px) {
  .hero-background-image {
    width: 90%;
    max-width: 1400px!important;
    left: 50%;
    transform: translateX(-50%);
  }
}

.hero-content-container {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 1200px;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 80px 1rem 2rem;  /* ヘッダー分の余白 */
  margin-top: 0;  /* PC版では中央配置 */
}
.hero-card {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: 20px;
  box-shadow: 0 20px 50px rgba(0,0,0,0.1);
  border: 1px solid rgba(255, 255, 255, 0.5);
  padding: clamp(2.5rem, 6vw, 4rem) clamp(1.5rem, 5vw, 3rem);
  width: clamp(340px, 90vw, 520px);
  max-width: 520px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  width: 470px;
  min-height: auto;
  height: auto;
  padding: 48px 42px;
  margin-bottom: 2rem;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  background: rgba(238, 242, 255, 0.7);
  border-radius: var(--radius-full);
  padding: 0.6em 1.3em;
  font-size: 0.8rem;
  font-weight: 600;
  color: #4f46e5;
  margin-bottom: 2rem;
  border: 1px solid rgba(224, 231, 255, 0.9);
}
.hero-title-gradient {
  font-size: clamp(3rem, 8vw, 5rem);
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 1rem;
  line-height: 1.1;
  margin-top: 3rem;
}
.hero-lead {
  font-size: clamp(1.1rem, 3vw, 1.5rem);
  font-weight: 700;
  color: var(--neutral-800);
  margin-bottom: 8px;
}
.hero-desc {
  color: var(--neutral-600);
  margin-bottom: 1rem;
  line-height: 1.5;
  max-width: 400px;
  text-align: left;
}
.hero-links {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  width: 100%;
  max-width: 360px;
  margin: 0 auto 2.5rem;
}
.hero-link {
  display: block;
  background: #fff;
  color: var(--primary-dark);
  font-weight: 600;
  border-radius: var(--radius-lg);
  padding: 1.3em;
  font-size: 0.9rem;
  text-decoration: none;
  border: 1px solid var(--neutral-200);
  box-shadow: var(--shadow-xs);
  transition: all var(--transition-base);
  height: 56px;
}
.hero-link:hover {
  background: #fff;
  color: var(--primary-dark);
  border-color: var(--primary-light);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.hero-cta {
  display: flex;
  gap: 1rem;
  width: 100%;
  max-width: 400px;
}
.hero-cta .btn {
  flex-grow: 1;
  font-size: 0.95rem;
  font-weight: 700;
  padding: 0.9em 1em;
  border-radius: var(--radius-lg);
}
.btn-primary {
    background: var(--gradient-primary);
    color: white;
    border: none;
}
.btn-outline {
    background: transparent;
    color: var(--primary-dark);
    border: 2px solid var(--primary-light);
}
.btn-outline:hover {
    background: var(--primary-light);
    color: white;
}
@media (max-width: 768px) {
  .hero {
    height: auto;
    min-height: 100vh;
    padding: 0;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: flex-start;  /* モバイルでは上部から配置 */
  }
  
  .hero-background-image {
    position: absolute;
    top: 96px;  /* ヘッダーの下に配置 */
    left: 0;
    width: 100%;
    height: 300px;  /* 固定高さ */
    z-index: 1;
  }
  
  .hero-background-image img {
    object-position: center top;  /* 画像の上部を表示 */
  }

  .hero-content-container{
    position: relative;
    margin-top: 280px;  /* 背景画像の下に配置 */
    padding: 2rem 1rem 2rem;
    z-index: 10;  /* 画像より前面に */
  }
}
@media (max-width: 480px) {
  .hero {
    padding: 5rem 5% 2rem;
  }
  .hero-card {
    width: 82vw;
    padding: 1.5rem 1rem;
    height: auto;
  }

  .hero-title-gradient{
    margin-top: 3rem;
    margin-bottom: 1rem;
  }
  
  .hero-background-image {
    position: absolute;
    top: 96px;  /* ヘッダーの下に配置 */
    left: 0;
    width: 100%;
    height: 250px;  /* 適切な高さに */
  }
  
  .hero-content-container {
    margin-top: 220px;  /* 背景画像の下に配置 */
    padding: 2rem 1rem 2rem;
  }
}

/* 1024px以下の高さでも表示されるように調整（PC版） */
@media (max-height: 1024px) and (min-width: 769px) {
  .hero {
    min-height: auto;
    padding: 80px 0 40px;
    height: auto;
  }
  
  .hero-content-container {
    padding: 80px 1rem 2rem;  /* PC版は通常通り */
    margin-top: 0;
  }
  
  .hero-card {
    padding: clamp(2rem, 4vw, 3rem) clamp(1.5rem, 4vw, 2.5rem);
    margin-bottom: 1rem;
  }
}

/* 768px以下の高さでさらに調整 */
@media (max-height: 768px) {
  .hero-card {
    padding: 2rem 1.5rem;
  }
  
  .hero-title-gradient {
    font-size: clamp(2.5rem, 8vw, 3.5rem);
    margin-bottom: 1rem;
  }
  
  .hero-lead {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
  }
  
  .hero-desc {
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
  }
  
  .hero-links {
    margin-bottom: 1.5rem;
  }
  
  .hero-cta {
    gap: 0.75rem;
  }
  
  .hero-card .scroll-indicator {
    margin-top: 1rem;
  }
}

.hero-shapes {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
}

.shape {
    position: absolute;
    border-radius: var(--radius-full);
    opacity: 0.1;
    animation: float 6s ease-in-out infinite;
}

.shape-1 {
    width: 300px;
    height: 300px;
    background: var(--gradient-primary);
    top: 10%;
    right: 10%;
    animation-delay: 0s;
}

.shape-2 {
    width: 200px;
    height: 200px;
    background: var(--gradient-secondary);
    bottom: 20%;
    left: 5%;
    animation-delay: 2s;
}

.shape-3 {
    width: 150px;
    height: 150px;
    background: var(--gradient-accent);
    top: 60%;
    right: 30%;
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(5deg);
    }
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
    width: 100%;
    padding: 0 var(--space-4);
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.hero-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--glass-border);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary);
    margin: 0 auto var(--space-6);
    box-shadow: var(--shadow-sm);
    width: max-content;
    white-space: nowrap;
    padding: 4px 16px;
}


.hero-title {
    margin-bottom: var(--space-4);
    animation: slideUp 0.8s ease-out;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--neutral-700);
    margin-bottom: var(--space-6);
    animation: slideUp 0.8s ease-out 0.2s both;
}

.hero-description {
    font-size: 1.125rem;
    margin-bottom: var(--space-8);
    animation: slideUp 0.8s ease-out 0.4s both;
}

.hero-cta {
    display: flex;
    justify-content: center;
    gap: var(--space-4);
    margin-bottom: var(--space-8);
    animation: slideUp 0.8s ease-out 0.6s both;
}

@media (max-width: 768px) {
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
}

.scroll-indicator {
    position: absolute;
    bottom: var(--space-6);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    color: var(--neutral-600);
    font-size: 0.875rem;
    animation: bounce 2s infinite;
    z-index: 2;
}

/* hero-card内のscroll-indicator */
.hero-card .scroll-indicator {
    position: relative;
    bottom: auto;
    margin-top: 2rem;
    left: auto;
    transform: none;
    color: var(--primary-light);
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    gap: var(--space-2);
}

.hero-card .scroll-mouse {
    border-color: var(--primary-light);
}

.hero-card .scroll-wheel {
    background: var(--primary-light);
}

@media (max-width: 768px) {
    .hero-card .scroll-indicator {
        margin-top: 1.5rem;
    }
    .scroll-mouse {
        width: 20px;
        height: 32px;
    }
    .scroll-indicator span {
        font-size: 0.75rem;
    }
}

/* hero-card内でのアニメーション調整 */
.hero-card .scroll-indicator {
    animation: bounceVertical 2s infinite;
}

@keyframes bounceVertical {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-5px);
    }
    60% {
        transform: translateY(-3px);
    }
}

.scroll-mouse {
    width: 24px;
    height: 40px;
    border: 2px solid var(--neutral-400);
    border-radius: 12px;
    position: relative;
}

.scroll-wheel {
    width: 4px;
    height: 8px;
    background: var(--neutral-400);
    border-radius: 2px;
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-5px);
    }
    60% {
        transform: translateX(-50%) translateY(-3px);
    }
}

@keyframes scroll {
    0% {
        top: 6px;
        opacity: 1;
    }
    50% {
        top: 16px;
        opacity: 0.5;
    }
    100% {
        top: 6px;
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* セクション完全スクロール問題解決 */
section {
    padding: clamp(2rem, 5vw, 5rem) 0 !important;
    position: relative;
    width: 100% !important;
    max-width: 100vw !important;
    min-width: 0 !important;
    /*overflow-x: hidden !important;*/ 
    overflow-y: visible !important;
    box-sizing: border-box !important;
    margin: 0 !important;
}

section:nth-child(even):not(.hero) {
    background: var(--neutral-100);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-16);
}

.section-badge {
    display: inline-block;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--glass-border);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: var(--space-4);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.section-title {
    margin-bottom: var(--space-6);
}

/* カード */
.card {
    background: white;
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--neutral-200);
    transition: all var(--transition-base);
    height: 100%;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

/* 課題セクション */
.challenges {
    overflow-x: hidden;
    overflow-y: visible;
    padding: clamp(2rem, 5vw, 5rem) 0;
}

.challenges-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(268px, 100%), 1fr)) !important;
    gap: clamp(1rem, 3vw, 1.5rem) !important;
    max-width: 100% !important;
    width: 100% !important;
    min-width: 0 !important;
    overflow-x: hidden !important;
    overflow-y: hidden !important;
    box-sizing: border-box !important;
    margin: 0 !important;
    padding: 8px 0 !important;
}

.challenge-card {
    background: white;
    border-radius: var(--radius-2xl);
    padding: var(--space-6);
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--neutral-200);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    min-height: 250px;
    width: 100%;
    box-sizing: border-box;
}

.challenge-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

.challenge-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    will-change: transform;
}

.challenge-icon {
    width: 64px;
    height: 64px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-4);
    color: white;
    font-size: 1.5rem;
}

.challenge-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-3);
    color: var(--neutral-900);
}

.challenge-card p {
    color: var(--neutral-600);
    margin-bottom: 0;
}

/* ソリューションセクション */
.solutions {
    position: relative;
    padding: var(--space-24) 0;
    overflow: hidden;
    overflow-y: hidden;
}

.solutions-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.bg-image {
    position: absolute;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    opacity: 0.05;
    background-size: cover;
    background-position: center;
}

.bg-image-1 {
    background: var(--gradient-primary);
    top: 10%;
    right: -100px;
    animation: float 8s ease-in-out infinite;
}

.bg-image-2 {
    background: var(--gradient-secondary);
    bottom: 10%;
    left: -100px;
    animation: float 8s ease-in-out infinite 4s;
}

.bg-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(248, 250, 252, 0.95) 100%);
}

.solutions .container {
    position: relative;
    z-index: 1;
}

.solutions-timeline {
    position: relative;
    margin: var(--space-16) 0;
}

.timeline-line {
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--gradient-primary);
    transform: translateX(-50%);
    border-radius: var(--radius);
    opacity: 0.3;
}

.solution-block {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--space-8);
    margin-bottom: var(--space-20);
    opacity: 0;
    transform: translateY(50px);
    animation: slideInUp 0.8s ease-out forwards;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.05);
}

.solution-block:nth-child(2) { animation-delay: 0.2s; }
.solution-block:nth-child(3) { animation-delay: 0.4s; }
.solution-block:nth-child(4) { animation-delay: 0.6s; }

.solution-block.reverse {
    flex-direction: row-reverse;
}

.solution-block.reverse .solution-content {
    text-align: right;
}

.solution-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-6);
    flex-shrink: 0;
    position: relative;
    z-index: 2;
}

.step-circle {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 3;
    box-shadow: var(--shadow-lg);
}

.step-number {
    color: white;
    font-size: 1.25rem;
    font-weight: 800;
}

.solution-image {
    width: 320px;
    height: 240px;
    border-radius: var(--radius-2xl);
    overflow: hidden;
    position: relative;
    box-shadow: var(--shadow-xl);
    transition: all var(--transition-base);
}

.solution-image:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-2xl);
}

.solution-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.solution-image .image-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    background: var(--gradient-neutral);
    color: var(--primary);
}

.solution-image .image-placeholder i {
    font-size: 2.5rem;
}

.solution-image .image-placeholder span {
    font-weight: 600;
    color: var(--neutral-700);
}

.solution-content {
    flex: 1;
    padding: var(--space-6);
    max-width: 600px;
}

.solution-header {
    margin-bottom: var(--space-6);
}

.solution-content h3 {
    font-size: 1.75rem;
    margin-bottom: var(--space-2);
    color: var(--neutral-900);
    line-height: 1.3;
}

.solution-subtitle {
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary);
    font-style: italic;
    margin-bottom: 0;
}

.solution-description {
    margin-bottom: var(--space-6);
}

.solution-description p {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--neutral-600);
    margin-bottom: 0;
}

.solution-features {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
}

.feature-highlight {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    background: white;
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--neutral-200);
    transition: all var(--transition-base);
    font-weight: 600;
    color: var(--neutral-700);
}

.feature-highlight:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.feature-highlight i {
    color: var(--primary);
    font-size: 1rem;
}

.solutions-cta {
    margin-top: var(--space-16);
    display: flex;
    justify-content: center;
}

.cta-card {
    background: white;
    padding: var(--space-12);
    border-radius: var(--radius-2xl);
    text-align: center;
    max-width: 800px;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--neutral-200);
    position: relative;
    overflow: hidden;
}

.cta-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

.cta-card h3 {
    font-size: 1.75rem;
    margin-bottom: var(--space-4);
    color: var(--neutral-900);
}

.cta-card p {
    font-size: 1.125rem;
    margin-bottom: var(--space-8);
    color: var(--neutral-600);
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* モバイル対応 */
@media (max-width: 968px) {
    .timeline-line {
        left: 30px;
    }
    
    .solutions {
        padding: var(--space-14) 0;
    }
    
    .solution-block,
    .solution-block.reverse {
        flex-direction: column;
        text-align: center !important;
        gap: var(--space-6);
        margin-bottom: var(--space-12);
        padding: var(--space-6);
        border-radius: var(--radius-xl);
    }
    
    .solution-visual {
        order: 1;
    }
    
    .solution-content {
        order: 2;
        max-width: 100%;
        padding: var(--space-5);
    }
    
    .solution-image {
        width: 280px;
        height: 200px;
        margin: 0 auto;
    }
    
    .solution-features {
        justify-content: center;
        gap: var(--space-3);
        flex-wrap: wrap;
    }
    
    .cta-card {
        padding: var(--space-6);
        margin: 0 var(--space-4);
    }
    
    .step-circle {
        position: relative;
        left: auto;
        top: auto;
        transform: none;
        width: 50px;
        height: 50px;
        margin-bottom: var(--space-3);
    }
}

@media (max-width: 768px) {
    .solutions {
        padding: var(--space-12) 0;
    }
    
    .solution-block {
        margin-bottom: var(--space-8);
        padding: var(--space-4);
        border-radius: var(--radius-xl);
    }
    
    .solution-content {
        padding: var(--space-4);
    }
    
    .solution-image {
        width: 240px;
        height: 180px;
    }
    
    .solution-features {
        gap: var(--space-2);
        justify-content: center;
    }
    
    .cta-card {
        padding: var(--space-6);
        margin: 0 var(--space-3);
    }
    
    .step-circle {
        left: -20px;
        width: 40px;
        height: 40px;
    }
    
    .step-number {
        font-size: 1rem;
    }
}

/* 強みセクション */
.strengths {
    overflow-x: hidden;
    overflow-y: visible;
    padding: clamp(2rem, 5vw, 5rem) 0;
}

.strengths-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(350px, 100%), 1fr)) !important;
    gap: clamp(1.5rem, 4vw, 2rem) !important;
    max-width: min(1200px, 100%) !important;
    margin: 0 auto !important;
    width: 100% !important;
    min-width: 0 !important;
    box-sizing: border-box !important;
    /*overflow-x: hidden !important;*/
    /*overflow-y: visible !important;*/
    padding: 12px 0 !important;
}

@media (max-width: 768px) {
    .strengths-container {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }
}

.strength-card {
    background: white;
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--neutral-200);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    text-align: center;
    min-height: 280px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.strength-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: var(--gradient-primary);
}

.strength-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
    will-change: transform;
}

.strength-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-6);
    color: white;
    font-size: 2.5rem;
    box-shadow: var(--shadow-lg);
}

.strength-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--space-4);
    color: var(--neutral-900);
    font-weight: 800;
}

.strength-card p {
    color: var(--neutral-600);
    line-height: 1.6;
    font-size: 1.1rem;
    margin-bottom: 0;
}

.strength-number {
    position: absolute;
    top: var(--space-6);
    right: var(--space-6);
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.9);
    border: 2px solid var(--primary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-weight: 800;
    font-size: 1.125rem;
    backdrop-filter: blur(10px);
}

/* ユースケースセクション */
.usecases-tabs {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: clamp(0.5rem, 2vw, 0.75rem) !important;
    margin-bottom: clamp(2rem, 5vw, 3rem) !important;
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
    /*overflow-x: hidden !important;*/
    box-sizing: border-box !important;
    padding: 0 !important;
}

.tab-btn {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    background: white;
    border: 2px solid var(--neutral-200);
    border-radius: var(--radius-full);
    padding: var(--space-3) var(--space-6);
    font-weight: 600;
    color: var(--neutral-700);
    cursor: pointer;
    transition: all var(--transition-base);
}

.tab-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.tab-btn:hover:not(.active) {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-1px);
}

.usecases-content {
    position: relative;
    min-height: 300px;
    overflow-y: hidden;
}

.usecase-panel {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--transition-base);
    pointer-events: none;
}

.usecase-panel.active {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.usecase-card {
    background: white;
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--neutral-200);
    display: flex;
    gap: var(--space-6);
    align-items: flex-start;
}

@media (max-width: 768px) {
    .usecases-content {
        min-height: auto;
        position: static;
    }
    
    .usecase-panel {
        position: static;
        opacity: 0;
        display: none;
        transform: none;
        transition: none;
    }
    
    .usecase-panel.active {
        opacity: 1;
        display: block;
        transform: none;
    }
    
    .usecases-tabs {
        gap: var(--space-2);
        padding: 0 var(--space-2);
    }
    
    .tab-btn {
        padding: var(--space-2) var(--space-4);
        font-size: 0.875rem;
        min-width: auto;
        flex: 1;
        justify-content: center;
    }
    
    .usecase-card {
        flex-direction: column;
        text-align: center;
        padding: var(--space-6);
        margin: 0;
        width: 100%;
        box-sizing: border-box;
    }
    
    .usecase-icon {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
        margin-bottom: var(--space-4);
        align-self: center;
    }
    
    .usecase-content h3 {
        font-size: 1.5rem;
        margin-bottom: var(--space-3);
    }
    
    .usecase-examples {
        justify-content: center;
    }
}

.usecase-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    flex-shrink: 0;
}

.usecase-content h3 {
    font-size: 1.75rem;
    margin-bottom: var(--space-4);
    color: var(--neutral-900);
}

.usecase-examples {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-top: var(--space-4);
}

.example-tag {
    background: var(--neutral-100);
    color: var(--primary);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
}

/* CTA コンテナ */
.cta-container {
    text-align: center;
    margin-top: var(--space-8);
}

@media (max-width: 768px) {
    .cta-container {
        margin-top: var(--space-6);
    }
}

@media (max-width: 480px) {
    .cta-container {
        margin-top: var(--space-4);
    }
}

/* 開発実績セクション */
.cases {
    overflow-x: hidden !important;
    overflow-y: hidden;
    width: 100%;
    max-width: 100vw;
    contain: layout;
    margin-top: 40px;
}

.cases-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-12);
    position: relative;
    overflow-x: hidden !important;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    contain: layout;
}

.case-card {
    position: relative;
    overflow: hidden;
    min-height: auto;
    padding: var(--space-12) 0;
    display: flex;
    align-items: center;
    transition: all var(--transition-base);
    background: var(--neutral-50);
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    contain: layout;
    transform: translateZ(0);
}

    .case-card {
    flex-direction: row;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
}

.case-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(99, 102, 241, 0.03) 0%, transparent 50%);
    z-index: 1;
    pointer-events: none;
}

.case-image {
    flex: 0.4;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-xl);
}

.case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-xl);
}



.image-placeholder {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    color: var(--neutral-500);
    padding: var(--space-8);
    text-align: center;
    background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
    width: 100%;
    height: 100%;
}

.image-placeholder i {
    font-size: 4rem;
    color: var(--primary);
    opacity: 0.7;
}

.image-placeholder span {
    font-weight: 600;
    color: var(--neutral-700);
    font-size: 1.125rem;
}

.case-content {
    flex: 0.6;
    padding: 0 var(--space-8);
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: var(--space-6);
    position: relative;
    z-index: 2;
}

.case-header {
    margin-bottom: 0;
}

.case-category {
    display: inline-flex;
    align-items: center;
    background: var(--gradient-primary);
    color: white;
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: var(--space-4);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.case-content h3 {
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    margin-bottom: var(--space-4);
    color: var(--neutral-900);
    line-height: 1.2;
    font-weight: 800;
}

.case-description {
    margin-bottom: var(--space-5);
}

.case-description h4 {
    font-size: 1rem;
    color: var(--primary);
    margin-bottom: var(--space-3);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.case-description ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: var(--space-2);
}

.case-description li {
    color: var(--neutral-600);
    line-height: 1.6;
    position: relative;
    padding-left: var(--space-4);
    margin-bottom: 0;
    font-size: 0.95rem;
}

.case-description li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.7em;
    width: 4px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 50%;
    transform: translateY(-50%);
}

.case-features {
    margin-bottom: var(--space-4);
}

.feature-item {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    margin: 0 var(--space-2) var(--space-2) 0;
    font-size: 0.8rem;
    color: var(--neutral-700);
    padding: var(--space-1) var(--space-3);
    background: rgba(255, 255, 255, 0.8);
    border-radius: var(--radius-full);
    border: 1px solid rgba(99, 102, 241, 0.1);
    backdrop-filter: blur(4px);
    transition: all var(--transition-fast);
}

.feature-item:hover {
    background: rgba(99, 102, 241, 0.1);
    border-color: rgba(99, 102, 241, 0.2);
    transform: translateY(-1px);
}

.feature-item i {
    color: var(--primary);
    width: 12px;
    font-size: 0.75rem;
}

.case-tech {
    background: rgba(255, 255, 255, 0.6);
    border-radius: var(--radius-xl);
    padding: var(--space-5);
    border: 1px solid rgba(226, 232, 240, 0.5);
    backdrop-filter: blur(8px);
}

.case-tech h4 {
    font-size: 1rem;
    margin-bottom: var(--space-4);
    color: var(--neutral-900);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.tech-details {
    display: grid;
    gap: var(--space-2);
}

.tech-row {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: var(--space-3);
    padding: var(--space-2) 0;
    font-size: 0.85rem;
    line-height: 1.5;
    border-bottom: 1px solid rgba(226, 232, 240, 0.3);
}

.tech-row:last-child {
    border-bottom: none;
}

.tech-row strong {
    color: var(--primary);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-1);
}

.tech-tag {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius);
    font-size: 0.7rem;
    font-weight: 500;
    border: 1px solid rgba(99, 102, 241, 0.2);
}

@media (max-width: 1200px) {
    .case-card {
        padding: var(--space-10) 0;
    }
    
    .case-image {
        height: 400px;
    }
    
    .case-content {
        padding: 0 var(--space-6);
    }
    }
    
@media (max-width: 968px) {
    .case-card {
        flex-direction: column;
        padding: var(--space-8) 0;
    }
    
    .case-image {
        height: 350px;
        width: 100%;
        flex: none;
        margin-bottom: var(--space-6);
    }
    
    .case-content {
        padding: 0 var(--space-6);
        flex: none;
        width: 100%;
        max-width: none;
        gap: var(--space-5);
    }
    
    .case-description ul {
        gap: var(--space-2);
    }
    
    .tech-row {
        grid-template-columns: 1fr;
        gap: var(--space-1);
        padding: var(--space-3) 0;
    }
}

@media (max-width: 768px) {
    .cases {
        overflow-x: hidden !important;
        max-width: 100vw !important;
        contain: layout !important;
    }
    
    .cases-grid {
        overflow-x: hidden !important;
        max-width: 100% !important;
        contain: layout !important;
        gap: var(--space-8);
    }
    
    .case-card {
        padding: var(--space-6) 0;
        overflow: hidden !important;
        max-width: 100% !important;
        contain: layout !important;
        transform: translateZ(0) !important;
    }
    
    .case-image {
        height: 280px;
        width: 100%;
        margin-bottom: var(--space-5);
        overflow: hidden;
        box-sizing: border-box;
    }
    
    .case-content {
        padding: 0 var(--space-4);
        width: 100%;
        gap: var(--space-4);
        box-sizing: border-box;
        overflow-x: hidden;
        max-width: 100%;
    }
    
    .case-tech {
        padding: var(--space-4);
        width: 100%;
        box-sizing: border-box;
        overflow-x: hidden;
        max-width: 100%;
    }
    
    .feature-item {
        font-size: 0.75rem;
        padding: var(--space-1) var(--space-2);
        box-sizing: border-box;
        max-width: fit-content;
    }
    
    .case-features {
        overflow-x: hidden;
        width: 100%;
        box-sizing: border-box;
    }
    
    .tech-details {
        overflow-x: hidden;
        width: 100%;
        box-sizing: border-box;
    }
}

/* コア技術セクション */
.core-tech {
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    position: relative;
    overflow: visible !important;
    padding: clamp(3rem, 6vw, 6rem) 0;
}

.core-tech::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.08) 0%, rgba(99, 102, 241, 0) 70%);
    border-radius: 50%;
    z-index: 0;
}

.core-tech::after {
    content: '';
    position: absolute;
    bottom: -100px;
    left: -100px;
    width: 250px;
    height: 250px;
    background: radial-gradient(circle, rgba(6, 182, 212, 0.08) 0%, rgba(6, 182, 212, 0) 70%);
    border-radius: 50%;
    z-index: 0;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(500px, 100%), 1fr));
    gap: clamp(2rem, 5vw, 3rem);
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    overflow: visible !important;
}

.tech-section {
    background: rgba(255, 255, 255, 0.9);
    border-radius: var(--radius-2xl);
    padding: clamp(1.5rem, 4vw, 2.5rem);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    transition: all var(--transition-slow);
    position: relative;
    overflow: visible !important;
}

.tech-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
}

.tech-section:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
    border-color: rgba(99, 102, 241, 0.2);
    will-change: transform;
}

.tech-header {
    display: flex;
    align-items: center;
    gap: var(--space-5);
    margin-bottom: var(--space-8);
    position: relative;
}

.tech-icon {
    width: 64px;
    height: 64px;
    background: var(--gradient-primary);
    border-radius: var(--radius-2xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    flex-shrink: 0;
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.3);
    position: relative;
    transition: all var(--transition-base);
}

.tech-icon::after {
    content: '';
    position: absolute;
    inset: -2px;
    background: var(--gradient-primary);
    border-radius: var(--radius-2xl);
    z-index: -1;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.tech-section:hover .tech-icon::after {
    opacity: 0.2;
}

.tech-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--neutral-900);
    margin: 0;
    line-height: 1.3;
}

.tech-features {
    display: flex;
    flex-direction: column;
    gap: clamp(1rem, 3vw, 1.5rem);
    overflow: visible !important;
}

.tech-feature {
    background: rgba(248, 250, 252, 0.6);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    border: 1px solid rgba(226, 232, 240, 0.5);
    transition: all var(--transition-base);
    position: relative;
}

.tech-feature::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 40%;
    background: var(--gradient-primary);
    border-radius: 0 var(--radius) var(--radius) 0;
    opacity: 0;
    transition: all var(--transition-base);
}

.tech-feature:hover {
    background: rgba(255, 255, 255, 0.8);
    transform: translateX(8px);
    border-color: rgba(99, 102, 241, 0.2);
}

.tech-feature:hover::before {
    opacity: 1;
}

.tech-feature h4 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--neutral-900);
    margin-bottom: var(--space-4);
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.tech-feature h4::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--gradient-primary);
    border-radius: 50%;
    flex-shrink: 0;
}

.tech-feature p {
    color: var(--neutral-600);
    line-height: 1.7;
    margin-bottom: 0;
    font-size: 1rem;
}

.feature-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.feature-list li {
    color: var(--neutral-600);
    line-height: 1.7;
    position: relative;
    padding-left: var(--space-6);
    margin-bottom: 0;
    font-size: 0.95rem;
    transition: color var(--transition-fast);
}

.feature-list li:hover {
    color: var(--neutral-800);
}

.feature-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.7em;
    width: 6px;
    height: 6px;
    background: var(--gradient-primary);
    border-radius: 50%;
    transform: translateY(-50%);
}

@media (max-width: 968px) {
    .tech-grid {
        grid-template-columns: 1fr;
        gap: clamp(1.5rem, 4vw, 2rem);
        max-height: none;
    }
    
    .tech-section {
        padding: clamp(1.25rem, 3vw, 1.5rem);
        max-height: none;
        height: auto;
    }
    
    .tech-icon {
        width: 56px;
        height: 56px;
        font-size: 1.25rem;
    }
    
    .tech-title {
        font-size: 1.5rem;
    }
    
    .tech-features {
        gap: clamp(0.75rem, 2.5vw, 1.25rem);
        max-height: none;
        height: auto;
    }
    
    .tech-feature {
        padding: clamp(1rem, 2.5vw, 1.25rem);
        max-height: none;
        height: auto;
    }
}

@media (max-width: 768px) {
    .tech-header {
        gap: var(--space-4);
        margin-bottom: var(--space-6);
    }
    
    .tech-icon {
        width: 48px;
        height: 48px;
        font-size: 1.125rem;
    }
    
    .tech-title {
        font-size: 1.375rem;
    }
    
    .tech-feature {
        padding: clamp(0.75rem, 2vw, 1rem);
        max-height: none;
        height: auto;
    }
    
    .tech-feature h4 {
        font-size: 1.125rem;
    }
    
    .core-tech {
        padding: clamp(2rem, 5vw, 4rem) 0;
        max-height: none;
    }
}

/* デモセクション */
.demo-container {
    max-width: 1000px;
    margin: 0 auto;
}

.demo-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
    align-items: start;
}

@media (max-width: 968px) {
    .demo-content {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }
}

.demo-video {
    background: white;
    border-radius: var(--radius-2xl);
    padding: var(--space-6);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--neutral-200);
}

.video-wrapper {
    position: relative;
    aspect-ratio: 16 / 9;
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.video-thumbnail {
    width: 100%;
    height: 100%;
    position: relative;
    background: var(--neutral-200);
    display: flex;
    align-items: center;
    justify-content: center;
}

.video-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.video-placeholder {
    display: none;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
    color: var(--neutral-500);
}

.video-placeholder i {
    font-size: 3rem;
}

.play-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.3);
    transition: all var(--transition-base);
}

.play-btn {
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.9);
    border: none;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--primary);
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-lg);
}

.play-btn:hover {
    background: white;
    transform: scale(1.1);
}

.demo-info {
    background: white;
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--neutral-200);
}

.demo-info h3 {
    font-size: 1.5rem;
    margin-bottom: var(--space-6);
    color: var(--neutral-900);
}

.demo-features {
    margin-bottom: var(--space-6);
}

.demo-feature {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
    padding: var(--space-3);
    background: var(--neutral-50);
    border-radius: var(--radius-lg);
}

.demo-feature i {
    color: var(--primary);
    width: 20px;
    font-size: 1.125rem;
}

.demo-instructions {
    margin-bottom: var(--space-6);
}

.demo-instructions h4 {
    font-size: 1.125rem;
    margin-bottom: var(--space-3);
    color: var(--neutral-900);
}

.demo-instructions ol {
    list-style: none;
    counter-reset: step-counter;
}

.demo-instructions li {
    counter-increment: step-counter;
    position: relative;
    padding-left: var(--space-8);
    margin-bottom: var(--space-2);
    color: var(--neutral-600);
}

.demo-instructions li::before {
    content: counter(step-counter);
    position: absolute;
    left: 0;
    top: 0;
    width: 24px;
    height: 24px;
    background: var(--primary);
    color: white;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 600;
}

.demo-cta {
    margin-bottom: var(--space-4);
}

.demo-note {
    font-size: 0.875rem;
    color: var(--neutral-500);
    font-style: italic;
    margin-bottom: 0;
}

/* FAQ セクション */
.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-4);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--neutral-200);
    overflow: hidden;
    transition: all var(--transition-base);
}

.faq-item:hover {
    box-shadow: var(--shadow-md);
}

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-6);
    cursor: pointer;
    transition: all var(--transition-base);
}

.faq-question:hover {
    background: var(--neutral-50);
}

.faq-question h3 {
    font-size: 1.125rem;
    margin-bottom: 0;
    color: var(--neutral-900);
}

.faq-question i {
    color: var(--primary);
    transition: transform var(--transition-base);
    font-size: 1.25rem;
}

.faq-item.active .faq-question i {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 var(--space-6) var(--space-6);
    display: none;
}

.faq-item.active .faq-answer {
    display: block;
    animation: slideDown var(--transition-base) ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* お問い合わせセクション */
.contact-section {
    background: linear-gradient(135deg, var(--neutral-50) 0%, var(--neutral-100) 100%);
    position: relative;
    overflow: hidden;
}

.contact-section::before {
    content: '';
    position: absolute;
    top: -50px;
    right: -50px;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.08) 0%, rgba(99, 102, 241, 0) 70%);
    border-radius: 50%;
    z-index: 0;
}

.contact-section h2 {
    text-align: center;
    font-size: clamp(2rem, 4vw, 2.5rem);
    margin-bottom: var(--space-12);
    color: var(--neutral-900);
    position: relative;
    z-index: 1;
}

.contact-form-container {
    max-width: 600px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.contact-form {
    background: white;
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--neutral-200);
    backdrop-filter: blur(10px);
}

.form-group {
    margin-bottom: var(--space-6);
}

.form-group:last-of-type {
    margin-bottom: var(--space-8);
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--neutral-900);
    font-size: 0.875rem;
    margin-bottom: var(--space-2);
}

.required {
    color: var(--error);
    margin-left: var(--space-1);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--space-4);
    border: 2px solid var(--neutral-200);
    border-radius: var(--radius-lg);
    font-family: inherit;
    font-size: 1rem;
    transition: all var(--transition-base);
    background: white;
    box-sizing: border-box;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
    transform: translateY(-2px);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
    line-height: 1.5;
}

.form-group.privacy-policy {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    margin-bottom: var(--space-8);
}

.form-group.privacy-policy input[type="checkbox"] {
    width: auto;
    margin: 0;
    transform: scale(1.2);
    cursor: pointer;
}

.form-group.privacy-policy label {
    margin: 0;
    font-size: 0.875rem;
    line-height: 1.5;
    cursor: pointer;
    flex: 1;
}

.privacy-policy-link {
    color: var(--primary);
    text-decoration: underline;
    font-weight: 600;
    transition: color var(--transition-base);
}

.privacy-policy-link:hover {
    color: var(--primary-dark);
}

.submit-button {
    width: 100%;
    padding: var(--space-4) var(--space-6);
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: var(--radius-xl);
    font-family: inherit;
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    box-shadow: var(--shadow-md);
}

.submit-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left var(--transition-slow);
}

.submit-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.submit-button:hover::before {
    left: 100%;
}

.submit-button:active {
    transform: translateY(0);
}

/* モバイル対応 - スクロール有効化 */
@media (max-width: 768px) {
    html {
        overflow: auto !important;
        overflow-x: hidden !important;
        overflow-y: auto !important;
        height: auto !important;
        max-height: none !important;
    }
    
    body {
        overflow: auto !important;
        overflow-x: hidden !important;
        overflow-y: auto !important;
        height: auto !important;
        max-height: none !important;
        min-height: 100vh !important;
    }
    
    /* セクション間余白調整 */
    section {
        padding: var(--space-10) 0 !important;
        margin: 0 !important;
        min-height: auto !important;
        height: auto !important;
        overflow: visible !important;
    }

    .hero {
        padding: var(--space-8) 0 !important;
        height: auto !important;
        max-height: none !important;
        min-height: 80vh !important;
        display: flex;
        align-items: center;
        box-sizing: border-box;
        overflow: visible !important;
    }
    
    .challenges {
        overflow-x: hidden !important;
        width: 100%;
        max-width: 100vw;
    }
    
    .challenges-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
        max-width: 100%;
        overflow-x: hidden;
        margin: 0;
        padding: 0;
    }
    
    .challenge-card {
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
        margin: 0;
    }
    
    .strengths {
        overflow-x: hidden !important;
        width: 100%;
        max-width: 100vw;
    }
    
    .strengths-container {
        grid-template-columns: 1fr;
        gap: var(--space-4);
        max-width: 100%;
        overflow-x: hidden;
        margin: 0;
        padding: 0;
        width: 100%;
        box-sizing: border-box;
    }
    
    .strength-card {
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
        margin: 0;
        min-height: auto;
    }

    .contact-section {
        padding: var(--space-10) 0;
    }

    .contact-section h2 {
        font-size: clamp(1.75rem, 5vw, 2rem);
        margin-bottom: var(--space-8);
    }

    .contact-form-container {
        padding: 0 var(--space-4);
    }

    .contact-form {
        padding: var(--space-6);
    }

    .form-group {
        margin-bottom: var(--space-5);
    }

    .form-group input,
    .form-group textarea {
        padding: var(--space-3);
        font-size: 0.95rem;
    }

    .submit-button {
        padding: var(--space-3) var(--space-5);
        font-size: 1rem;
    }

    .form-group.privacy-policy {
        gap: var(--space-2);
        margin-bottom: var(--space-6);
    }

    .form-group.privacy-policy label {
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .contact-section::before {
        top: -30px;
        right: -30px;
        width: 150px;
        height: 150px;
    }

    .contact-form {
        padding: var(--space-5);
        margin: 0 var(--space-2);
    }

    .form-group input,
    .form-group textarea {
        padding: var(--space-3);
    }

    .form-group.privacy-policy input[type="checkbox"] {
        transform: scale(1.1);
    }

    .submit-button {
        font-size: 0.95rem;
        padding: var(--space-3) var(--space-4);
    }
}

/* フッター */
.footer {
    background: var(--neutral-50) !important;
    color: var(--neutral-700) !important;
    padding: clamp(2rem, 4vw, 4rem) 0 clamp(1rem, 2vw, 2rem) !important;
    width: 100% !important;
    max-width: 100vw !important;
    min-width: 0 !important;
    overflow-x: hidden !important;
    box-sizing: border-box !important;
    margin: 0 !important;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--space-12);
    margin-bottom: var(--space-12);
}

@media (max-width: 968px) {
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }
}

.footer-brand {
    max-width: 400px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--neutral-900);
    margin-bottom: var(--space-4);
}

.footer-logo i {
    color: var(--primary);
}

.footer-brand p {
    color: var(--neutral-400);
    line-height: 1.6;
    margin-bottom: 0;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-8);
}

.footer-section h4 {
    color: var(--neutral-900);
    font-size: 1.125rem;
    margin-bottom: var(--space-4);
}

.footer-section ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.footer-section li {
    margin-bottom: var(--space-2);
}

.footer-section a {
    color: var(--neutral-600);
    text-decoration: none;
    transition: color var(--transition-base);
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--space-8);
}

.footer-bottom p {
    color: var(--neutral-500);
    font-size: 0.875rem;
    margin-bottom: 0;
}

/* レスポンシブ調整 */
/* PC版完全スクロールバー非表示最適化 */
@media (min-width: 1025px) {
    html {
        overflow-x: hidden !important;
        overflow-y: auto !important;
    }
    
    body {
        overflow-x: hidden !important;
        overflow-y: auto !important;
        min-height: 100vh !important;
    }
    
    .hero {
        height: 90vh !important;
        max-height: 90vh !important;
        padding: 0 !important;
    }
    
    .hero-content {
        padding: 0 clamp(1rem, 2vw, 2rem) !important;
    }
    
    .challenges {
        overflow-x: hidden;
        contain: layout;
        padding: clamp(2rem, 3vw, 3rem) 0 !important;
    }
    
    .challenges-grid {
        contain: layout;
        max-width: 100%;
    }
    
    .challenge-card {
        contain: layout;
        transform: translateZ(0); /* ハードウェアアクセラレーション有効化 */
    }
    
    .strengths {
        overflow-x: hidden;
        contain: layout;
        padding: clamp(2rem, 3vw, 3rem) 0 !important;
    }
    
    .strengths-container {
        contain: layout;
        max-width: 100%;
    }
    
    .strength-card {
        contain: layout;
        transform: translateZ(0); /* ハードウェアアクセラレーション有効化 */
    }
    
    .cases {
        overflow-x: hidden;
        contain: layout;
        padding: clamp(2rem, 3vw, 3rem) 0 !important;
    }
    
    .cases-grid {
        contain: layout;
        max-width: 100%;
    }
    
    .case-card {
        contain: layout;
        transform: translateZ(0); /* ハードウェアアクセラレーション有効化 */
    }
    
    .core-tech {
        contain: none !important;
        padding: clamp(2rem, 3vw, 3rem) 0 !important;
        min-height: auto !important;
        height: auto !important;
        overflow-y: visible !important;
    }
    
    .tech-grid {
        contain: none !important;
        max-width: 100%;
        min-height: auto !important;
        height: auto !important;
        overflow-y: visible !important;
    }
    
    .tech-section {
        contain: none !important;
        transform: translateZ(0); /* ハードウェアアクセラレーション有効化 */
        min-height: auto !important;
        height: auto !important;
        overflow-y: visible !important;
    }
    
    section:not(.hero) {
        padding: clamp(2rem, 3vw, 3rem) 0 !important;
    }
}

@media (max-width: 480px) {
    html, body {
        overflow-x: hidden !important;
        width: 100% !important;
        max-width: 100vw !important;
        height: auto !important;
        min-height: 100vh !important;
    }
    
    .hero {
        padding: var(--space-6) 0;
        width: 100%;
        max-width: 100vw;
        height: 100vh;
        min-height: 100vh;
        overflow: hidden !important;
        display: flex;
        align-items: center;
        position: relative;
        box-sizing: border-box;
    }
    
    .hero-content {
        width: 100%;
        max-width: 100%;
        margin: 0 auto;
        text-align: center;
        z-index: 1;
        position: relative;
        padding: 0 var(--space-3);
    }
    
    .hero-cta {
        flex-direction: column;
        gap: var(--space-3);
        margin-bottom: var(--space-6);
    }
    
    .hero-cta .btn {
        padding: var(--space-3) var(--space-6);
        font-size: 0.875rem;
        width: 100%;
        max-width: 280px;
        margin: 0 auto;
    }
    
    /* Challenges セクション - モバイル最適化 */
    .challenges {
        overflow-x: hidden !important;
        width: 100%;
        max-width: 100vw;
        padding: var(--space-8) 0;
    }
    
    .challenges-grid {
        grid-template-columns: 1fr !important;
        gap: var(--space-3);
        max-width: 100%;
        overflow-x: hidden;
        margin: 0;
        padding: 0 var(--space-3);
        box-sizing: border-box;
    }
    
    .challenge-card {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box;
        margin: 0 !important;
        padding: var(--space-4) !important;
        min-height: auto;
    }
    
    /* Strengths セクション - モバイル最適化 */
    .strengths {
        overflow-x: hidden !important;
        width: 100%;
        max-width: 100vw;
        padding: var(--space-8) 0;
    }
    
    .strengths-container {
        grid-template-columns: 1fr !important;
        gap: var(--space-3);
        max-width: 100%;
        overflow-x: hidden;
        margin: 0;
        padding: 0 var(--space-3);
        box-sizing: border-box;
    }
    
    .strength-card {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        margin: 0 !important;
        min-height: auto !important;
        overflow: hidden !important;
        padding: var(--space-6) var(--space-4);
    }
    
    /* Use Cases 特別調整 */
    .usecases-tabs {
        gap: var(--space-1);
        padding: 0 var(--space-2);
        margin-bottom: var(--space-8);
        flex-wrap: wrap;
    }
    
    .tab-btn {
        padding: var(--space-2) var(--space-3);
        font-size: 0.75rem;
        min-width: 0;
        flex: 1 1 auto;
        text-align: center;
        white-space: nowrap;
        overflow: hidden;
        max-width: calc(50% - var(--space-1));
    }
    
    .tab-btn span {
        display: none;
    }
    
    .tab-btn i {
        margin: 0;
    }
    
    .usecases-content {
        min-height: auto;
        margin: 0;
        padding: 0 var(--space-2);
        position: static;
    }
    
    .usecase-panel {
        position: static;
        width: 100%;
        margin: 0;
        opacity: 0;
        display: none;
        transform: none;
        transition: none;
    }
    
    .usecase-panel.active {
        opacity: 1;
        display: block;
        transform: none;
    }
    
    .usecase-card {
        padding: var(--space-4);
        margin: 0;
        width: 100%;
        box-sizing: border-box;
        flex-direction: column;
        text-align: center;
        gap: var(--space-4);
    }
    
    .usecase-icon {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
        margin: 0 auto var(--space-3);
        align-self: center;
    }
    
    .usecase-content {
        width: 100%;
        margin: 0;
    }
    
    .usecase-content h3 {
        font-size: 1.25rem;
        margin-bottom: var(--space-2);
        line-height: 1.3;
    }
    
    .usecase-content p {
        font-size: clamp(0.9375rem, 3.5vw, 1rem) !important;
        line-height: 1.5 !important;
    }
    
    .usecase-examples {
        justify-content: center;
        gap: var(--space-1);
    }
    
    .example-tag {
        font-size: 0.75rem;
        padding: var(--space-1) var(--space-2);
    }
    
    section {
        padding: var(--space-12) 0;
        width: 100% !important;
        max-width: 100vw !important;
        overflow: hidden !important;
        margin: 0;
        min-height: auto !important;
        height: auto !important;
    }
    
    .container {
        width: 100% !important;
        max-width: 100vw !important;
        padding: 0 var(--space-3) !important;
        margin: 0 !important;
        box-sizing: border-box !important;
    }
    
    /* コンタクト特別調整 */
    .contact-container {
        max-width: 100vw;
        padding: 0 var(--space-3);
        margin: 0;
        width: 100%;
        box-sizing: border-box;
    }
    
    .contact-form-wrapper {
        padding: var(--space-6);
        margin: 0;
        width: 100%;
        box-sizing: border-box;
    }
    
    .contact-details {
        margin: 0;
        width: 100%;
    }
    
    .contact-card {
        margin: 0;
        width: 100%;
        box-sizing: border-box;
    }

    /* グローバルタイポグラフィモバイル調整 */
    h1 {
        font-size: clamp(1.4rem, 6vw, 2.2rem) ;
        line-height: 1.25 !important;
    }

    h2 {
        font-size: clamp(1.2rem, 5.5vw, 1.8rem) !important;
        line-height: 1.3 !important;
    }

    h3 {
        font-size: clamp(1rem, 4.5vw, 1.4rem) !important;
        line-height: 1.35 !important;
    }

    h4 {
        font-size: clamp(0.9rem, 4vw, 1.2rem) !important;
        line-height: 1.4 !important;
    }

    p {
        font-size: clamp(0.9375rem, 3.5vw, 1rem) !important;
        line-height: 1.55 !important;
        margin-bottom: var(--space-3) !important;
    }

    /* セクション専用テキスト調整 */
    .section-title {
        font-size: clamp(1.2rem, 5.5vw, 1.8rem) !important;
        line-height: 1.3 !important;
        margin-bottom: var(--space-6) !important;
    }

    .section-badge {
        font-size: 0.7rem !important;
        padding: var(--space-1) var(--space-2) !important;
    }

    /* ヒーロー */
    .hero-title {
        font-size: clamp(1.4rem, 6vw, 2.2rem) !important;
        line-height: 1.25 !important;
    }

    .hero-subtitle {
        font-size: clamp(0.9rem, 4vw, 1.1rem) !important;
        line-height: 1.4 !important;
    }

    .hero-description {
        font-size: clamp(0.9375rem, 3.5vw, 1rem) !important;
        line-height: 1.5 !important;
    }

    /* チャレンジカード */
    .challenge-card h3 {
        font-size: clamp(0.9rem, 4vw, 1.1rem) !important;
        line-height: 1.35 !important;
        margin-bottom: var(--space-2) !important;
    }

    .challenge-card p {
        font-size: clamp(0.9375rem, 3.2vw, 1rem) !important;
        line-height: 1.5 !important;
    }

    /* ストレングスカード */
    .strength-card h3 {
        font-size: clamp(0.9rem, 4vw, 1.1rem) !important;
        line-height: 1.35 !important;
        margin-bottom: var(--space-2) !important;
    }

    .strength-card p {
        font-size: clamp(0.9375rem, 3.2vw, 1rem) !important;
        line-height: 1.5 !important;
    }

    /* ソリューション */
    .solution-content h3 {
        font-size: clamp(0.95rem, 4.5vw, 1.25rem) !important;
        line-height: 1.3 !important;
        margin-bottom: var(--space-2) !important;
    }

    .solution-subtitle {
        font-size: clamp(0.7rem, 3vw, 0.8rem) !important;
    }

    .solution-description p {
        font-size: clamp(0.9375rem, 3.2vw, 1rem) !important;
        line-height: 1.5 !important;
    }

    /* ケーススタディ */
    .case-content h3 {
        font-size: clamp(0.95rem, 4.5vw, 1.25rem) !important;
        line-height: 1.3 !important;
        margin-bottom: var(--space-2) !important;
    }

    .case-description li {
        font-size: clamp(0.9375rem, 3.2vw, 1rem) !important;
        line-height: 1.5 !important;
    }

    /* テクノロジー */
    .tech-title {
        font-size: clamp(0.95rem, 4.5vw, 1.25rem) !important;
        line-height: 1.3 !important;
        margin-bottom: var(--space-3) !important;
    }

    .tech-feature h4 {
        font-size: clamp(0.85rem, 3.8vw, 1rem) !important;
        line-height: 1.4 !important;
        margin-bottom: var(--space-2) !important;
    }

    .tech-feature p {
        font-size: clamp(0.9375rem, 3.2vw, 1rem) !important;
        line-height: 1.5 !important;
    }

    .feature-list li {
        font-size: clamp(0.9375rem, 3vw, 1rem) !important;
        line-height: 1.5 !important;
    }

    /* FAQ */
    .faq-question h3 {
        font-size: clamp(0.9rem, 4vw, 1.1rem) !important;
        line-height: 1.35 !important;
    }

    .faq-answer p {
        font-size: clamp(0.9375rem, 3.2vw, 1rem) !important;
        line-height: 1.6 !important;
    }

    /* デモ */
    .demo-info h3 {
        font-size: clamp(0.95rem, 4.5vw, 1.25rem) !important;
        line-height: 1.3 !important;
    }

    .demo-feature span {
        font-size: clamp(0.9375rem, 3.2vw, 1rem) !important;
        line-height: 1.5 !important;
    }

    .demo-instructions li {
        font-size: clamp(0.9375rem, 3.2vw, 1rem) !important;
        line-height: 1.5 !important;
    }

    /* ボタン */
    .btn {
        font-size: clamp(0.75rem, 3.2vw, 0.85rem) !important;
        padding: var(--space-2) var(--space-3) !important;
    }

    .btn-large {
        font-size: clamp(0.8rem, 3.5vw, 0.95rem) !important;
        padding: var(--space-3) var(--space-4) !important;
    }

    /* ビューポート高さ制御 */
    .hero {
        min-height: 100vh !important;
        padding: var(--space-6) 0 !important;
        display: flex;
        align-items: center;
        box-sizing: border-box;
    }

    .solutions, .strengths, .usecases, .cases, .core-tech, .demo, .faq {
        padding: var(--space-8) 0 !important;
        min-height: auto !important;
        max-height: none !important;
        height: auto !important;
        overflow-y: visible !important;
    }

    /* Solutionsセクション 480px専用 */
    .solutions {
        padding: var(--space-6) 0 !important;
    }
    
    .solution-block {
        margin-bottom: var(--space-6) !important;
        padding: var(--space-3) !important;
        border-radius: var(--radius-lg) !important;
    }
    
    .solution-content {
        padding: var(--space-3) !important;
    }
    
    .solution-visual {
        margin-bottom: var(--space-4) !important;
    }
    
    .solution-image {
        width: 200px !important;
        height: 150px !important;
        margin: 0 auto !important;
    }
    
    .solution-features {
        flex-direction: column !important;
        align-items: center !important;
        gap: var(--space-2) !important;
        margin-top: var(--space-3) !important;
    }
    
    .feature-highlight {
        width: 100% !important;
        text-align: center !important;
        justify-content: center !important;
        padding: var(--space-2) var(--space-3) !important;
    }
    
    .cta-card {
        padding: var(--space-4) !important;
        margin: 0 var(--space-2) !important;
        text-align: center !important;
    }
    
    .step-circle {
        width: 32px !important;
        height: 32px !important;
        left: 50% !important;
        transform: translateX(-50%) !important;
        position: relative !important;
        margin-bottom: var(--space-2) !important;
    }
    
    .step-number {
        font-size: 0.875rem !important;
    }

    /* CASE STUDIES 480px専用 */
    .cases, .cases-grid {
        overflow-x: hidden !important;
        max-width: 100vw !important;
        contain: layout !important;
    }
    
    .case-card {
        padding: var(--space-4) 0 !important;
        margin-bottom: var(--space-6) !important;
        overflow: hidden !important;
        max-width: 100% !important;
        contain: layout !important;
        transform: translateZ(0) !important;
    }
    
    .case-image {
        height: 200px !important;
        width: 100% !important;
        margin-bottom: var(--space-4) !important;
        overflow: hidden !important;
        box-sizing: border-box !important;
    }
    
    .case-content {
        padding: 0 var(--space-3) !important;
        width: 100% !important;
        gap: var(--space-3) !important;
        box-sizing: border-box !important;
        overflow-x: hidden !important;
        max-width: 100% !important;
    }
    
    .case-tech {
        padding: var(--space-3) !important;
        width: 100% !important;
        box-sizing: border-box !important;
        overflow-x: hidden !important;
        max-width: 100% !important;
    }
    
    .case-features {
        display: flex !important;
        flex-wrap: wrap !important;
        gap: var(--space-1) !important;
        overflow-x: hidden !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }
    
    .feature-item {
        font-size: 0.7rem !important;
        padding: var(--space-1) var(--space-2) !important;
        box-sizing: border-box !important;
        max-width: fit-content !important;
        flex-shrink: 0 !important;
    }
    
    .tech-details {
        overflow-x: hidden !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }
    
    .tech-row {
        overflow-x: hidden !important;
        width: 100% !important;
        box-sizing: border-box !important;
        word-wrap: break-word !important;
        overflow-wrap: break-word !important;
    }

    /* コンテンツ高さ制限 */
    .hero-content, .section-header, .challenges-grid, .strengths-container, 
    .usecases-content, .cases-grid, .tech-grid, .demo-container, .faq-container {
        height: auto !important;
        min-height: auto !important;
        max-height: none !important;
        overflow-x: hidden !important;
        overflow-y: visible !important;
        width: 100% !important;
        max-width: 100vw !important;
    }
    
    /* Challenges 追加最適化 */
    .challenges, .challenges-grid {
        overflow-x: hidden !important;
        max-width: 100vw !important;
        contain: layout !important;
    }
    
    .challenge-card {
        contain: layout !important;
        transform: translateZ(0) !important;
        overflow: hidden !important;
    }
    
    /* Strengths 追加最適化 */
    .strengths, .strengths-container {
        overflow-x: hidden !important;
        max-width: 100vw !important;
        contain: layout !important;
    }
    
    .strength-card {
        contain: layout !important;
        transform: translateZ(0) !important;
        overflow: hidden !important;
    }

    /* CASE STUDIES 追加最適化 */
    .cases, .cases-grid {
        overflow-x: hidden !important;
        max-width: 100vw !important;
        contain: layout !important;
    }
    
    .case-card {
        contain: layout !important;
        transform: translateZ(0) !important;
        overflow: hidden !important;
    }



}

/* ヒーローセクション統計情報のスタイル */
.hero-stats {
    display: flex;
    gap: 2rem;
    margin: 2rem 0;
    justify-content: center;
}

.stat-item {
    text-align: center;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    min-width: 120px;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-color);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-color);
    font-weight: 500;
}

@media (max-width: 768px) {
    .hero-stats {
        gap: 1rem;
        margin: 1.5rem 0;
    }
    
    .stat-item {
        min-width: 100px;
        padding: 0.8rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .stat-label {
        font-size: 0.8rem;
    }
}

/* WebRTC技術定義セクションのスタイル */
.webrtc-definition {
    padding: 6rem 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.definition-content {
    max-width: 1000px;
    margin: 0 auto;
}

.definition-main h3 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    text-align: center;
}

.definition-main > p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-color);
    margin-bottom: 3rem;
    text-align: center;
}

/* PC版での可読性向上のため幅を制限 */
@media (min-width: 769px) {
    .webrtc-definition .definition-main > p {
        max-width: 800px !important;
        margin-left: auto !important;
        margin-right: auto !important;
        margin-bottom: 3rem !important;
    }
}

.tech-architecture,
.implementation-points {
    margin: 3rem 0;
}

.tech-architecture h4,
.implementation-points h4 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 2rem;
    text-align: center;
}

.architecture-grid,
.points-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.arch-item,
.point-item {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.arch-item h5,
.point-item h5 {
    font-size: 1.1rem;
    color: var(--primary-color);
    margin-bottom: 0.8rem;
    font-weight: 600;
}

.arch-item p,
.point-item p {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-color);
}

.point-item i {
    font-size: 1.5rem;
    color: var(--accent-color);
    margin-bottom: 1rem;
    display: block;
}

@media (max-width: 768px) {
    .architecture-grid,
    .points-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .arch-item,
    .point-item {
        padding: 1rem;
    }
}

/* WebRTC定義セクションの追加スタイル */
.intro-text {
    font-size: 1.1rem;
    line-height: 1.7;
    color: var(--text-color);
    margin-bottom: 2rem;
    font-style: italic;
    opacity: 0.9;
}

.section-gap {
  height: 40px;
  width: 100%;
}

/* case-cardのターゲット時のハイライト */
.case-card:target {
    animation: highlight 1s ease-out;
}

@keyframes highlight {
    0% {
        box-shadow: 0 0 0 0 rgba(99, 102, 241, 0.6);
    }
    50% {
        box-shadow: 0 0 0 20px rgba(99, 102, 241, 0.2);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(99, 102, 241, 0);
    }
}