/* リセットと基本設定 */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    /* カラーパレット */
    --color-bg-primary: #0a0a0a;
    --color-bg-secondary: #111111;
    --color-accent: #00ff88;
    --color-accent-secondary: #ff0066;
    --color-accent-tertiary: #00ccff;
    --color-white: #ffffff;
    --color-gray-light: #e0e0e0;
    --color-gray: #999999;
    --color-card-border: rgba(255, 255, 255, 0.1);
    
    /* ネオングロー効果 */
    --glow-accent: 0 0 20px rgba(0, 255, 136, 0.5);
    --glow-accent-strong: 0 0 40px rgba(0, 255, 136, 0.8);
    --glow-danger: 0 0 20px rgba(255, 0, 102, 0.5);
    --glow-info: 0 0 20px rgba(0, 204, 255, 0.5);
    
    /* グラデーション */
    --gradient-primary: linear-gradient(135deg, rgba(0, 180, 90, 1) 0%, rgba(0, 140, 180, 1) 100%);
    --gradient-card: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
    
    /* フォント */
    --font-primary: 'Noto Sans JP', sans-serif;
    --font-secondary: 'Inter', sans-serif;
    
    /* アニメーション */
    --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* レイアウト */
    --container-max: 1200px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    --spacing-xxl: 6rem;
    
    /* 共通シャドウ */
    --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.3);
    --shadow-card-hover: 0 15px 35px rgba(0, 0, 0, 0.5);
    --shadow-light: 0 5px 20px rgba(10, 22, 40, 0.2);
    
    /* 共通ブラー */
    --blur-backdrop: blur(10px);
    --blur-backdrop-strong: blur(15px);
    
    /* 共通ボーダー半径 */
    --radius-card: 20px;
    --radius-small: 15px;
    --radius-xs: 10px;
}

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

body {
    background-color: #0a0a0a; /* fallback */
    background-color: var(--color-bg-primary);
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(0, 255, 136, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 0, 102, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(0, 204, 255, 0.1) 0%, transparent 50%);
    background-attachment: fixed;
    background-size: cover;
    color: #e0e0e0; /* fallback */
    color: var(--color-gray-light);
    font-family: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif; /* fallback */
    font-family: var(--font-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

body::before {
    background: repeating-linear-gradient(
        0deg,
        transparent 0px,
        rgba(0, 0, 0, 0.03) 1px,
        transparent 2px,
        transparent 3px
    );
    content: '';
    height: 100%;
    left: 0;
    pointer-events: none;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1;
}

/* ローディング画面 */
.loading-screen {
    align-items: center;
    background: var(--color-bg-primary);
    display: flex;
    flex-direction: column;
    height: 100vh;
    justify-content: center;
    left: 0;
    position: fixed;
    top: 0;
    transition: opacity 0.6s ease-out;
    width: 100%;
    z-index: 10000;
}

.loading-screen.fade-out {
    opacity: 0;
    pointer-events: none;
}

.loading-animation {
    height: 100px;
    position: relative;
    width: 100px;
}

.loading-text {
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-tertiary));
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
    font-family: var(--font-secondary);
    font-size: 0.9rem;
    font-weight: 400;
    letter-spacing: 0.08em;
    margin-top: 1.5rem;
    padding-left: 0.08em;
    text-align: center;
    text-shadow: none;
    text-transform: uppercase;
}

.pulse-ring {
    animation: pulse 2s cubic-bezier(0.215, 0.61, 0.355, 1) infinite;
    border: 3px solid var(--color-accent);
    border-radius: 50%;
    box-shadow: var(--glow-accent);
    height: 100%;
    position: absolute;
    width: 100%;
}

.pulse-ring:nth-child(2) {
    animation-delay: 0.3s;
    border-color: var(--color-accent-secondary);
    box-shadow: var(--glow-danger);
}

.pulse-ring:nth-child(3) {
    animation-delay: 0.6s;
    border-color: var(--color-accent-tertiary);
    box-shadow: var(--glow-info);
}

@keyframes pulse {
    0% {
        opacity: 1;
        transform: scale(0.5);
    }
    100% {
        opacity: 0;
        transform: scale(1.5);
    }
}

/* ナビゲーション */
.navbar {
    -webkit-backdrop-filter: var(--blur-backdrop-strong);
    backdrop-filter: var(--blur-backdrop-strong);
    background: rgba(10, 10, 10, 0.9);
    border-bottom: 1px solid var(--color-card-border);
    position: fixed;
    top: 0;
    transition: var(--transition-base);
    width: 100%;
    z-index: 1000;
}

.navbar.scrolled {
    background: rgba(10, 10, 10, 0.95);
    box-shadow: 0 4px 20px rgba(0, 255, 136, 0.1), 0 0 0 1px var(--color-card-border);
}

.nav-container {
    align-items: center;
    display: flex;
    height: 80px;
    justify-content: space-between;
    margin: 0 auto;
    max-width: var(--container-max);
    padding: 0 var(--spacing-md);
    position: relative;
    z-index: 2;
}

.nav-logo {
    align-items: center;
    display: flex;
    gap: 0;
}

.expo-label {
    color: var(--color-white);
    font-size: 0.8rem;
    font-weight: 500;
    line-height: 1.2;
    margin-right: 1rem;
    white-space: nowrap;
}

.expo-image {
    border-right: 1px solid var(--color-white);
    height: 50px;
    margin-right: 1.5rem;
    padding-right: 1.5rem;
    width: auto;
}

.logo-text {
    color: var(--color-white);
    display: flex;
    flex-direction: column;
    font-family: var(--font-primary);
    font-size: 1.1rem;
    font-weight: 700;
    line-height: 1.3;
    text-align: center;
}

.logo-line {
    display: block;
    text-shadow: 
        0 0 6px rgba(0, 255, 136, 0.6),
        0 0 12px rgba(0, 255, 136, 0.4),
        0 0 18px rgba(0, 255, 136, 0.2);
}

.nav-toggle {
    background: none;
    border: none;
    cursor: pointer;
    display: none;
    flex-direction: column;
    height: 30px;
    padding: 4px;
    position: relative;
    width: 30px;
}

.nav-toggle:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.nav-toggle:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.nav-toggle span {
    background: var(--color-white);
    height: 3px;
    left: 50%;
    position: absolute;
    transform: translateX(-50%);
    transition: var(--transition-base);
    width: 25px;
}

.nav-toggle span:nth-child(1) {
    top: 6px;
}

.nav-toggle span:nth-child(2) {
    top: 50%;
    transform: translateX(-50%) translateY(-50%);
}

.nav-toggle span:nth-child(3) {
    bottom: 6px;
}

.nav-toggle.active span:nth-child(1) {
    top: 50%;
    transform: translateX(-50%) translateY(-50%) rotate(45deg);
}

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

.nav-toggle.active span:nth-child(3) {
    top: 50%;
    transform: translateX(-50%) translateY(-50%) rotate(-45deg);
}

.nav-menu {
    display: flex;
    gap: var(--spacing-md);
    list-style: none;
}

.nav-link {
    color: var(--color-white);
    font-size: 0.9rem;
    font-weight: 400;
    position: relative;
    text-decoration: none;
    transition: var(--transition-base);
}

.nav-link::after {
    background: var(--color-accent);
    bottom: -5px;
    box-shadow: var(--glow-accent);
    content: '';
    height: 2px;
    left: 0;
    position: absolute;
    transition: var(--transition-base);
    width: 0;
}

.nav-link:hover {
    color: var(--color-accent);
    text-shadow: var(--glow-accent);
}

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

/* ヒーローセクション */
.hero {
    align-items: center;
    display: flex;
    height: calc(100vh - 80px);
    justify-content: center;
    margin-top: 80px;
    overflow: hidden;
    position: relative;
    z-index: 2;
}

.hero-background {
    height: 100%;
    left: 0;
    position: absolute;
    top: 0;
    width: 100%;
    z-index: -1;
}

.hero-bg-image {
    background-image: url('img/bg-hero.webp');
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    filter: brightness(0.85) contrast(1.1);
    height: 100%;
    position: absolute;
    width: 100%;
}

.hero-gradient {
    background: 
        radial-gradient(ellipse at center, transparent 0%, rgba(0, 0, 0, 0.8) 100%),
        linear-gradient(45deg, rgba(0, 255, 136, 0.12) 0%, rgba(255, 0, 102, 0.12) 50%, rgba(0, 204, 255, 0.12) 100%);
    height: 100%;
    position: absolute;
    width: 100%;
}

.particle-container {
    height: 100%;
    position: absolute;
    width: 100%;
}

.hero-content {
    color: var(--color-white);
    padding: 0 var(--spacing-md);
    text-align: center;
    z-index: 1;
}

.hero-title {
    margin-bottom: 0.7rem;
}

.hero-title-image {
    animation: earthquake-shake 6s ease-in-out infinite;
    filter: drop-shadow(0 0 20px rgba(0, 255, 136, 0.5));
    height: auto;
    max-height: 300px;
    max-width: 80%;
    transition: filter 0.3s ease;
    will-change: transform;
}

/* アクセシビリティ: アニメーション無効化 */
@media (prefers-reduced-motion: reduce) {
    .hero-title-image {
        animation: none;
    }
    
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

@keyframes earthquake-shake {
    0%, 68% { 
        transform: translateX(0); 
    }
    69% { 
        transform: translateX(-2px); 
    }
    70% { 
        transform: translateX(3px); 
    }
    71% { 
        transform: translateX(-4px); 
    }
    72% { 
        transform: translateX(3px); 
    }
    73% { 
        transform: translateX(-5px); 
    }
    74% { 
        transform: translateX(4px); 
    }
    75% { 
        transform: translateX(-3px); 
    }
    76% { 
        transform: translateX(5px); 
    }
    77% { 
        transform: translateX(-4px); 
    }
    78% { 
        transform: translateX(11px); 
    }
    79% { 
        transform: translateX(-4px); 
    }
    80% { 
        transform: translateX(7px); 
    }
    81% { 
        transform: translateX(-10px); 
    }
    82% { 
        transform: translateX(8px); 
    }
    83% { 
        transform: translateX(-3px); 
    }
    84% { 
        transform: translateX(4px); 
    }
    85% { 
        transform: translateX(-7px); 
    }
    86% { 
        transform: translateX(5px); 
    }
    87% { 
        transform: translateX(-3px); 
    }
    88% { 
        transform: translateX(4px); 
    }
    89% { 
        transform: translateX(-4px); 
    }
    90% { 
        transform: translateX(3px); 
    }
    91% { 
        transform: translateX(-3px); 
    }
    92% { 
        transform: translateX(2px); 
    }
    93% { 
        transform: translateX(-2px); 
    }
    94% { 
        transform: translateX(1px); 
    }
    95% { 
        transform: translateX(-1px); 
    }
    96% { 
        transform: translateX(0.5px); 
    }
    97% { 
        transform: translateX(-0.3px); 
    }
    98% { 
        transform: translateX(0.1px); 
    }
    99%, 100% { 
        transform: translateX(0); 
    }
}

.hero-subtitle {
    align-items: center;
    animation: fade-up 1s ease-out 1s forwards;
    color: #f8f8f8;
    display: flex;
    font-family: "Noto Serif JP", "Yu Mincho", "YuMincho", "Hiragino Mincho ProN", "Hiragino Mincho Pro", serif;
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    font-weight: 400;
    gap: 1rem;
    justify-content: center;
    letter-spacing: 0.1em;
    line-height: 1.6;
    margin-bottom: 0.7rem;
    opacity: 0;
    position: relative;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8);
}

.hero-expo-info {
    animation: fade-up 1s ease-out 1.2s forwards;
    margin-bottom: 0.7rem;
    opacity: 0;
}

.expo-venue,
.expo-event {
    color: var(--color-white);
    font-family: var(--font-primary);
    text-align: center;
}

.expo-venue {
    font-size: clamp(0.8rem, 1.8vw, 0.95rem);
    font-weight: 400;
    margin: 0 0 0.25rem;
}

.expo-event {
    font-size: clamp(1rem, 2.2vw, 1.2rem);
    font-weight: 500;
    margin: 0 0 0.4rem;
}

.expo-period {
    color: var(--color-accent);
    font-family: "Inter", "Helvetica Neue", sans-serif;
    font-size: clamp(0.9rem, 2vw, 1.05rem);
    font-weight: 600;
    letter-spacing: 0.5px;
    margin: 0;
    text-align: center;
    text-shadow: 0 0 8px rgba(0, 255, 136, 0.3);
}

.hero-subtitle::before,
.hero-subtitle::after {
    background: linear-gradient(90deg, transparent, rgba(248, 248, 248, 0.6), transparent);
    content: '';
    flex: 1;
    height: 1px;
    max-width: 80px;
}

.hero-group-section {
    animation: fade-up 1s ease-out 1.2s forwards;
    opacity: 0;
}

.group-title {
    color: var(--color-gray-light);
    font-family: var(--font-primary);
    font-size: 1.2rem;
    font-weight: 500;
    margin-bottom: var(--spacing-md);
    opacity: 0.9;
    text-align: center;
    text-shadow: none;
}

.hero-logos {
    align-items: center;
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

.company-logo {
    align-items: center;
    display: flex;
    flex: 1;
    flex-direction: column;
    gap: var(--spacing-xs);
    max-width: 150px;
}

.hero-logo-image {
    filter: brightness(1) contrast(1.1);
    height: 45px;
    max-width: 100%;
    object-fit: contain;
    transition: var(--transition-base);
    width: auto;
}





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

.scroll-indicator {
    align-items: center;
    animation: fade-up 1s ease-out 1.5s forwards;
    bottom: 30px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    left: 50%;
    opacity: 0;
    position: absolute;
    transform: translateX(-50%);
}


.scroll-arrow {
    align-self: center;
    height: 50px;
    position: relative;
    width: 2px;
}

.scroll-arrow::before {
    animation: scroll-line-flow 2s ease-in-out infinite;
    background: var(--color-white);
    content: '';
    height: 20px;
    left: 0;
    position: absolute;
    top: 0;
    width: 100%;
}

@keyframes scroll-line-flow {
    0% {
        transform: translateY(-12px);
        opacity: 0;
    }
    20% {
        transform: translateY(-12px);
        opacity: 1;
    }
    80% {
        transform: translateY(18px);
        opacity: 1;
    }
    100% {
        transform: translateY(30px);
        opacity: 0;
    }
}

/* セクション共通スタイル */
section {
    padding: var(--spacing-xxl) 0;
}

.container {
    margin: 0 auto;
    max-width: var(--container-max);
    padding: 0 var(--spacing-md);
}

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

.section-title {
    display: inline-block;
    position: relative;
}

.title-en {
    color: var(--color-white);
    display: block;
    font-family: var(--font-secondary);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    letter-spacing: 2px;
    line-height: 1;
    text-shadow: var(--glow-accent);
}

.title-ja {
    color: var(--color-gray);
    display: block;
    font-size: 1rem;
    margin-top: var(--spacing-xs);
}

/* コンセプトセクション */
.concept {
    background: var(--color-bg-secondary);
    position: relative;
    z-index: 2;
}

.concept-content {
    display: grid;
    gap: var(--spacing-xl);
}

.concept-grid {
    display: grid;
    gap: var(--spacing-lg);
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.concept-card {
    -webkit-backdrop-filter: var(--blur-backdrop);
    backdrop-filter: var(--blur-backdrop);
    background: var(--gradient-card);
    border: 1px solid var(--color-card-border);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
    transition: var(--transition-base);
}

.card-image {
    height: 200px;
    overflow: hidden;
    position: relative;
    width: 100%;
}

.card-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('img/concept1.webp');
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    transition: transform 0.3s ease;
}

.card-image.concept2-bg::before {
    background-image: url('img/concept2.webp');
}

.card-content {
    flex: 1;
    padding: var(--spacing-md);
}

.concept-card:hover {
    border-color: var(--color-accent);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5), var(--glow-accent);
}

.concept-card:hover .card-image::before {
    transform: scale(1.1);
}

.concept-card.danger:hover {
    border-color: var(--color-accent-secondary);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5), var(--glow-danger);
}



.card-title {
    color: var(--color-white);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.card-description {
    color: var(--color-gray-light);
    line-height: 1.8;
}

.concept-video {
    border-radius: var(--radius-card);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    position: relative;
}

.video-container {
    background: var(--color-bg-primary);
    border: 1px solid var(--color-card-border);
    padding-bottom: 56.25%;
    position: relative;
}

.video-placeholder {
    color: var(--color-white);
    font-size: 1.5rem;
    left: 50%;
    position: absolute;
    text-align: center;
    top: 50%;
    transform: translate(-50%, -50%);
}


/* 技術紹介セクション */
.technology {
    background: var(--color-bg-primary);
    position: relative;
    z-index: 2;
}

.tech-grid {
    display: grid;
    gap: var(--spacing-lg);
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.tech-card {
    align-items: center;
    -webkit-backdrop-filter: var(--blur-backdrop);
    backdrop-filter: var(--blur-backdrop);
    background: var(--gradient-card);
    border: 1px solid var(--color-card-border);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    display: flex;
    flex-direction: column;
    min-height: 450px;
    overflow: hidden;
    position: relative;
    text-align: center;
    transition: var(--transition-base);
}

.tech-card:hover {
    border-color: var(--color-accent);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4), var(--glow-accent);
    transform: translateY(-5px);
}

.tech-features-section {
    margin-top: var(--spacing-md);
    padding: 0 var(--spacing-md) var(--spacing-md);
    text-align: left;
    width: 100%;
}

.tech-image {
    border-radius: 20px 20px 0 0;
    height: 250px;
    overflow: hidden;
    width: 100%;
}

.tech-image img {
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
    width: 100%;
}

.tech-card:hover .tech-image img {
    transform: scale(1.1);
}

.tech-title {
    color: var(--color-white);
    font-size: 1.5rem;
    margin: var(--spacing-md) 0 var(--spacing-sm);
}

.tech-summary {
    color: var(--color-gray-light);
    line-height: 1.6;
    padding: 0 var(--spacing-md);
}

.tech-features {
    list-style: none;
    text-align: left;
}

.tech-features li {
    margin-bottom: var(--spacing-sm);
    padding-left: 1.5rem;
    position: relative;
}

.tech-features li::before {
    color: var(--color-accent);
    content: '✓';
    font-weight: bold;
    left: 0;
    position: absolute;
}

.tech-concept-image {
    border: 1px solid var(--color-card-border);
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    display: block;
    margin: var(--spacing-xl) auto 0;
    overflow: hidden;
    transition: var(--transition-base);
}

.tech-concept-image img {
    display: block;
    height: auto;
    transition: var(--transition-base);
    width: 100%;
}

@media (hover: hover) {
    .tech-concept-image:hover {
        border-color: var(--color-accent);
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3), var(--glow-accent);
    }
}

.tech-description {
    margin: var(--spacing-md) auto 0;
    max-width: 800px;
    text-align: left;
}

.tech-description p {
    color: var(--color-gray-light);
    font-size: 1.1rem;
    line-height: 1.7;
}


/* システム開発グループセクション */
.partners {
    background: var(--color-bg-secondary);
    position: relative;
    z-index: 2;
}

.partners-grid {
    display: grid;
    gap: var(--spacing-lg);
    grid-template-columns: 1fr;
    margin: 0 auto;
    max-width: 800px;
}

.partner-card {
    -webkit-backdrop-filter: var(--blur-backdrop);
    backdrop-filter: var(--blur-backdrop);
    background: var(--gradient-card);
    border: 1px solid var(--color-card-border);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    padding: var(--spacing-md);
    transition: var(--transition-base);
}

.partner-card:hover {
    border-color: var(--color-accent);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5), var(--glow-accent);
    transform: translateY(-5px);
}


.partner-logo {
    align-items: center;
    display: flex;
    gap: var(--spacing-md);
    height: auto;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    padding: 0;
}

.partner-logo:has(img:only-child) {
    max-width: 180px;
}

.partner-logo:has(img:nth-child(2)) {
    max-width: 360px;
}

.partner-logo img {
    height: auto;
    max-height: 80px;
    object-fit: contain;
    width: auto;
    max-width: 150px;
}

.partner-logo:has(img:only-child) img {
    max-width: 100%;
}

.partner-name {
    color: var(--color-white);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    text-align: center;
}

.partner-description {
    color: var(--color-gray-light);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.partner-contribution h4 {
    color: var(--color-white);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-sm);
}

.partner-contribution ul {
    list-style: none;
}

.partner-contribution li {
    color: var(--color-gray-light);
    margin-bottom: var(--spacing-xs);
    padding-left: 1.5rem;
    position: relative;
}

.partner-contribution li::before {
    color: var(--color-accent);
    content: '•';
    left: 0;
    position: absolute;
    text-shadow: var(--glow-accent);
}

.partner-link {
    align-items: center;
    background: var(--gradient-primary);
    border-radius: 25px;
    color: var(--color-white);
    display: flex;
    font-weight: 600;
    gap: 0.5rem;
    justify-content: center;
    margin: var(--spacing-md) auto 0;
    overflow: hidden;
    padding: 0.75rem 1.5rem;
    position: relative;
    text-decoration: none;
    transition: var(--transition-base);
    width: fit-content;
}

.partner-link::before {
    background: rgba(255, 255, 255, 0.1);
    content: '';
    height: 100%;
    left: 0;
    position: absolute;
    top: 0;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    width: 100%;
}

.partner-link:hover::before {
    transform: translateX(0);
}

.partner-link:hover {
    box-shadow: 0 5px 15px rgba(0, 255, 136, 0.3);
    transform: translateY(-2px);
}

.link-icon {
    transition: transform 0.3s ease;
}

.partner-link:hover .link-icon {
    transform: translate(2px, -2px);
}

/* 体験内容セクション */
.experience {
    background: var(--color-bg-primary);
    position: relative;
    z-index: 2;
}

.experience-timeline {
    margin: 0 auto var(--spacing-xl);
    max-width: 800px;
    position: relative;
}

.experience-timeline::before {
    background: linear-gradient(180deg, var(--color-accent), var(--color-accent-secondary));
    bottom: 0;
    box-shadow: var(--glow-accent);
    content: '';
    left: 50px;
    position: absolute;
    top: 0;
    width: 2px;
}

.timeline-item {
    animation: slide-in 0.6s ease-out forwards;
    margin-bottom: var(--spacing-xl);
    opacity: 0;
    padding-left: 100px;
    position: relative;
    transform: translateX(-30px);
}

.timeline-item:nth-child(1) { 
    animation-delay: 0.1s; 
}

.timeline-item:nth-child(2) { 
    animation-delay: 0.2s; 
}

.timeline-item:nth-child(3) { 
    animation-delay: 0.3s; 
}

.timeline-item:nth-child(4) { 
    animation-delay: 0.4s; 
}

@keyframes slide-in {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.timeline-marker {
    align-items: center;
    background: var(--gradient-primary);
    border: 2px solid var(--color-accent);
    border-radius: 50%;
    box-shadow: var(--glow-accent-strong);
    display: flex;
    height: 40px;
    justify-content: center;
    left: 30px;
    position: absolute;
    top: 0;
    width: 40px;
}

.marker-number {
    color: var(--color-white);
    font-size: 0.9rem;
    font-weight: bold;
}

.timeline-content {
    -webkit-backdrop-filter: var(--blur-backdrop);
    backdrop-filter: var(--blur-backdrop);
    background: var(--gradient-card);
    border: 1px solid var(--color-card-border);
    border-radius: var(--radius-small);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
    padding: var(--spacing-md);
}

.timeline-title {
    color: var(--color-white);
    font-size: 1.3rem;
    margin-bottom: var(--spacing-sm);
}

.timeline-description {
    color: var(--color-gray-light);
    line-height: 1.8;
    margin-bottom: var(--spacing-sm);
}

.timeline-duration {
    color: var(--color-accent);
    font-size: 0.9rem;
    font-weight: 600;
}

.experience-info {
    display: grid;
    gap: var(--spacing-md);
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    margin: 0 auto;
    max-width: 600px;
}

.info-card {
    background: var(--gradient-primary);
    border-radius: var(--radius-small);
    box-shadow: 0 10px 20px rgba(10, 22, 40, 0.2);
    color: var(--color-white);
    padding: var(--spacing-md);
    text-align: center;
}

.info-card h4 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xs);
}

.info-card p {
    font-size: 1.5rem;
    font-weight: bold;
}

.info-card p.small {
    color: var(--color-white);
    font-size: 0.85rem;
    font-weight: normal;
    margin-top: 0.5rem;
}

/* アクセスセクション */
.access {
    background: var(--color-bg-secondary);
    position: relative;
    z-index: 2;
}

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

.access-info {
    -webkit-backdrop-filter: var(--blur-backdrop);
    backdrop-filter: var(--blur-backdrop);
    background: var(--gradient-card);
    border: 1px solid var(--color-card-border);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    max-width: 800px;
    padding: var(--spacing-lg);
    width: 100%;
}

.info-section {
    border-bottom: 1px solid var(--color-card-border);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
}

.info-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.info-section h3 {
    color: var(--color-white);
    font-size: 1.2rem;
    margin-bottom: var(--spacing-sm);
}

.info-section p,
.info-section li {
    color: var(--color-gray-light);
    line-height: 1.8;
}

.info-section ul {
    list-style: none;
}

.info-section li {
    margin-bottom: var(--spacing-xs);
    padding-left: 1.5rem;
    position: relative;
}

.info-section li::before {
    color: var(--color-accent);
    content: '→';
    left: 0;
    position: absolute;
    text-shadow: var(--glow-accent);
}

/* フッター */
.footer {
    background: var(--color-bg-primary);
    border-top: 1px solid var(--color-card-border);
    color: var(--color-white);
    padding: var(--spacing-xl) 0 var(--spacing-md);
    position: relative;
    z-index: 2;
}

.footer-content {
    align-items: start;
    display: grid;
    gap: var(--spacing-xl);
    grid-template-columns: 2fr 3fr;
    margin-bottom: var(--spacing-lg);
}

.footer-logo {
    line-height: 1.3;
    margin-bottom: 0;
}

.footer-logo .logo-text {
    display: inline-block;
    font-family: var(--font-primary);
    font-size: 1.1rem;
    font-weight: 700;
    line-height: 1.5;
}

.footer-tagline {
    color: var(--color-gray);
    font-size: 0.9rem;
    line-height: 1.6;
}

.footer-links {
    align-items: flex-start;
    display: flex;
    gap: var(--spacing-lg);
    justify-content: flex-end;
}

.footer-column {
    align-items: flex-start;
    display: flex;
    flex-direction: column;
}

.footer-column h4 {
    color: var(--color-accent);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
}

.sponsor-logos {
    align-items: flex-start;
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

.sponsor-logo {
    display: block;
    transition: var(--transition-base);
}

.sponsor-logo img {
    display: block;
    filter: brightness(1.0);
    height: auto;
    max-width: 120px;
    object-fit: contain;
    transition: var(--transition-base);
}

.sponsor-logo:hover img {
    filter: brightness(1.1);
    transform: scale(1.05);
}

.footer-column ul {
    list-style: none;
}

.footer-column li {
    margin-bottom: var(--spacing-xs);
}

.footer-column a {
    color: var(--color-gray);
    text-decoration: none;
    transition: var(--transition-base);
}

.footer-column a:hover {
    color: var(--color-accent);
    text-shadow: var(--glow-accent);
}

/* 一般的なリンクスタイル */
a {
    color: var(--color-accent-tertiary);
    text-decoration: none;
    transition: var(--transition-base);
}

a:hover {
    color: var(--color-accent);
    text-shadow: var(--glow-accent);
}


.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-card-border);
    color: var(--color-gray);
}

.footer-bottom p {
    margin-bottom: var(--spacing-xs);
}

.expo-section {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-card-border);
}

.expo-text {
    flex: 1;
    margin: 0;
    text-align: left;
}

.footer-sponsor {
    margin: 0;
    text-align: center;
}

.expo-banner {
    filter: brightness(0.9);
    height: auto;
    max-width: 150px;
    object-fit: contain;
    transition: var(--transition-base);
    width: 100%;
}

.expo-banner:hover {
    filter: brightness(1.1);
    transform: scale(1.05);
}

/* モバイル用改行 */
.mobile-br {
    display: none;
}

/* レスポンシブデザイン */
@media (min-width: 1920px) {
    .hero-title-image {
        max-width: 100%;
    }
}

@media (max-width: 1366px) {
    .hero-title-image {
        max-height: 200px;
        max-width: 70%;
    }
}

@media (max-width: 1024px) {
    .access-content,
    .concept-grid {
        grid-template-columns: 1fr;
    }
    
    .expo-image {
        display: none;
    }
    
    .footer-content {
        gap: var(--spacing-md);
        grid-template-columns: 1fr;
    }
    
    .footer-column {
        align-items: center;
    }
    
    .footer-links {
        align-items: center;
        flex-direction: column;
        justify-content: center;
        text-align: center;
    }
    
    .footer-logo {
        margin-bottom: var(--spacing-sm);
        text-align: center;
    }
    
    .footer-logo .logo-text {
        text-align: center;
    }
    
    .group-title {
        font-size: 1rem;
    }
    
    .hero-logos {
        flex-direction: row;
        flex-wrap: nowrap;
        gap: var(--spacing-sm);
    }
    
    
    .logo-text {
        font-size: 0.85rem;
    }
    
    .nav-link {
        display: block;
        font-size: 1.2rem;
        padding: 1rem 2rem;
    }
    
    .nav-link:hover {
        color: var(--color-white);
        text-shadow: none;
    }
    
    .nav-link::after {
        display: none;
    }
    
    .nav-menu {
        -webkit-backdrop-filter: blur(20px);
        background: rgba(10, 10, 15, 0.85);
        backdrop-filter: blur(20px);
        bottom: 0;
        box-shadow: 0 4px 30px rgba(0, 0, 0, 0.8);
        flex-direction: column;
        gap: 0.5rem;
        height: 100vh;
        justify-content: flex-start;
        left: -100%;
        overflow-y: auto;
        padding: 100px 0 0;
        position: fixed;
        text-align: center;
        top: 0;
        transition: var(--transition-base);
        width: 100%;
        z-index: 1000;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-toggle {
        display: flex;
        z-index: 1100;
    }
    
    .partner-card {
        align-items: center;
        padding: var(--spacing-md);
    }
    
    .partners-grid,
    .tech-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
    
    .sponsor-logo img {
        height: 30px;
    }
    
    .sponsor-logos {
        flex-wrap: wrap;
        justify-content: center;
        max-width: 100%;
    }
    
    .timeline-item {
        padding-left: 70px;
    }
    
    .timeline-marker {
        left: 10px;
    }
    
    .experience-timeline::before {
        left: 30px;
    }
    
    .title-en {
        font-size: 2rem;
        letter-spacing: 0;
        word-break: break-word;
    }
}

/* スマホサイズの追加調整 */
@media (max-width: 480px) {
    .access-info {
        padding: var(--spacing-md);
    }
    
    .card-content,
    .partner-card {
        padding: var(--spacing-sm);
    }
    
    .concept-card:hover {
        border-color: var(--color-card-border);
        box-shadow: var(--shadow-card);
    }
    
    .concept-card:hover .card-image {
        transform: none;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .expo-section {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .expo-text {
        margin-bottom: 0;
        text-align: center;
    }
    
    .hero-content {
        padding-bottom: 10vh;
    }
    
    .hero-expo-info,
    .hero-subtitle,
    .hero-title {
        margin-bottom: var(--spacing-sm);
    }
    
    .hero-title-image {
        max-height: 300px;
        max-width: 80%;
    }
    
    .hero-group-section {
        margin-top: 0;
    }
    
    .info-card {
        padding: var(--spacing-sm);
    }
    
    .partner-card:hover {
        border-color: var(--color-card-border);
        box-shadow: var(--shadow-card);
        transform: none;
    }
    
    .scroll-indicator {
        bottom: 60px;
    }
    
    .section-header {
        margin-bottom: var(--spacing-lg);
    }
    
    section {
        padding: var(--spacing-lg) 0;
    }
    
    .sponsor-logo img {
        height: auto;
        max-width: 120px;
    }
    
    .sponsor-logo:hover img {
        filter: brightness(1.0);
        transform: none;
    }
    
    .sponsor-logos {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .tech-card:hover {
        border-color: var(--color-card-border);
        box-shadow: var(--shadow-card);
        transform: none;
    }
    
    .tech-card:hover .tech-image img {
        transform: none;
    }
    
    .timeline-content {
        padding: var(--spacing-sm);
    }
    
    .video-placeholder {
        font-size: .9rem;
    }
    
    .mobile-br {
        display: inline;
    }
}


/* ゲーミングエフェクト */
@keyframes neon-pulse {
    0%, 100% { 
        text-shadow: 
            0 0 5px var(--color-accent),
            0 0 10px var(--color-accent),
            0 0 15px var(--color-accent);
    }
    50% { 
        text-shadow: 
            0 0 10px var(--color-accent),
            0 0 20px var(--color-accent),
            0 0 30px var(--color-accent);
    }
}

@keyframes border-glow {
    0%, 100% { 
        box-shadow: 
            0 0 5px var(--color-accent),
            inset 0 0 5px rgba(0, 255, 136, 0.1);
    }
    50% { 
        box-shadow: 
            0 0 20px var(--color-accent),
            0 0 30px var(--color-accent),
            inset 0 0 10px rgba(0, 255, 136, 0.2);
    }
}

@keyframes scan-line {
    0% { 
        transform: translateX(-100%); 
    }
    100% { 
        transform: translateX(100vw); 
    }
}


/* ホバー時のゲーミングエフェクト */




/* ゲーミング風のセクション区切り */
section::before {
    background: linear-gradient(90deg, 
        transparent 0%, 
        var(--color-accent) 20%, 
        var(--color-accent-secondary) 50%, 
        var(--color-accent-tertiary) 80%, 
        transparent 100%);
    content: '';
    height: 1px;
    left: 0;
    opacity: 0.5;
    position: absolute;
    right: 0;
    top: 0;
}

/* パーティクルエフェクト */
@keyframes rf-pulse {
    0% {
        opacity: 0;
        transform: translate(-50%, -50%) scale(0.1);
    }
    1% {
        opacity: 0.8;
        transform: translate(-50%, -50%) scale(0.1);
    }
    100% {
        opacity: 0;
        transform: translate(-50%, -50%) scale(2);
    }
}

@keyframes rfid-blink {
    0%, 80% {
        box-shadow: 0 0 5px rgba(0, 255, 136, 0.3);
        opacity: 0.3;
        transform: scale(1);
    }
    90% {
        box-shadow: 0 0 20px rgba(0, 255, 136, 0.8);
        opacity: 1;
        transform: scale(1.3);
    }
    100% {
        box-shadow: 0 0 5px rgba(0, 255, 136, 0.3);
        opacity: 0.3;
        transform: scale(1);
    }
}

/* パーティクル要素 */
.rf-wave {
    border-style: dashed;
    pointer-events: none;
}

.light-particle {
    background: rgba(0, 255, 136, 0.6);
    border-radius: 50%;
}

/* スキャンライン効果 */
body::after {
    animation: scan-line 3s ease-in-out infinite;
    background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
    content: '';
    height: 2px;
    left: -100%;
    pointer-events: none;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 3;
}

/* 
===========================================
プロダクション最適化済み
- ブラウザ互換性対応済み
- アクセシビリティ対応済み
- パフォーマンス最適化済み
- フォールバック値対応済み
===========================================
*/