/* ============================================ */
/* サイバーパンク風ランディングページ - メインCSS */
/* NEO TOKYO 204X */
/* ============================================ */

/* CSSカスタムプロパティ（変数） */
:root {
    /* カラーパレット */
    --color-deep-black: #0A0A0A;
    --color-midnight-blue: #001F3F;
    --color-dark-purple: #2A0A2A;
    --color-electric-blue: #00FFFF;
    --color-cyber-pink: #FF00FF;
    --color-neon-green: #39FF14;
    --color-bright-yellow: #FFFF00;
    --color-silver-gray: #808080;
    --color-white: #FFFFFF;
    
    /* グラデーション */
    --gradient-neon: linear-gradient(45deg, var(--color-electric-blue), var(--color-cyber-pink));
    --gradient-dark: linear-gradient(135deg, var(--color-deep-black), var(--color-midnight-blue));
    
    /* フォント */
    --font-primary: 'Orbitron', monospace;
    --font-secondary: 'Rajdhani', sans-serif;
    --font-mono: 'Share Tech Mono', monospace;
    
    /* タイポグラフィ */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;
    
    /* スペーシング */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* アニメーション */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* シャドウ */
    --shadow-neon: 0 0 10px currentColor;
    --shadow-neon-strong: 0 0 20px currentColor;
    --shadow-neon-intense: 0 0 30px currentColor;
}

/* ============================================ */
/* リセットとベーススタイル */
/* ============================================ */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-secondary);
    background: var(--color-deep-black);
    color: var(--color-white);
    overflow-x: hidden;
    line-height: 1.6;
    cursor: crosshair;
}

/* 選択テキストのスタイル */
::selection {
    background: var(--color-electric-blue);
    color: var(--color-deep-black);
}

/* スクロールバーのスタイル */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-deep-black);
}

::-webkit-scrollbar-thumb {
    background: var(--color-electric-blue);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-cyber-pink);
}

/* ============================================ */
/* ローディングアニメーション */
/* ============================================ */

.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-deep-black);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s ease;
}

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

.loading-content {
    text-align: center;
    font-family: var(--font-mono);
}

.loading-text {
    font-size: var(--font-size-xl);
    color: var(--color-neon-green);
    margin-bottom: var(--spacing-lg);
    text-shadow: var(--shadow-neon);
    animation: pulse 1.5s infinite;
}

.loading-bar {
    width: 300px;
    height: 2px;
    background: rgba(57, 255, 20, 0.2);
    border-radius: 1px;
    overflow: hidden;
    margin: 0 auto var(--spacing-lg);
}

.loading-progress {
    height: 100%;
    background: var(--color-neon-green);
    width: 0%;
    transition: width 0.3s ease;
    box-shadow: var(--shadow-neon);
}

.loading-status {
    font-size: var(--font-size-sm);
    color: var(--color-silver-gray);
    letter-spacing: 2px;
}

/* ============================================ */
/* ナビゲーション */
/* ============================================ */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--spacing-md) 0;
    background: rgba(10, 10, 10, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 255, 255, 0.1);
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(10, 10, 10, 0.95);
    padding: var(--spacing-sm) 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: baseline;
    gap: var(--spacing-xs);
}

.logo-text {
    font-family: var(--font-primary);
    font-size: var(--font-size-lg);
    font-weight: 900;
    color: var(--color-electric-blue);
    text-shadow: var(--shadow-neon-strong);
}

.logo-year {
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    color: var(--color-neon-green);
}

.nav-menu {
    display: flex;
    gap: var(--spacing-xl);
}

.nav-link {
    font-family: var(--font-secondary);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-white);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    transition: all var(--transition-normal);
}

.nav-link::before {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    color: var(--color-electric-blue);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.nav-link:hover {
    color: transparent;
    text-shadow: var(--shadow-neon);
}

.nav-link:hover::before {
    opacity: 1;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: var(--color-electric-blue);
    transition: all var(--transition-normal);
}

/* ============================================ */
/* ヒーローセクション */
/* ============================================ */

.hero {
    min-height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

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

.particles-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.particle {
    position: absolute;
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
    pointer-events: none;
}

.digital-rain {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    opacity: 0.3;
}

.hologram-effect {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 30%, rgba(0, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(255, 0, 255, 0.1) 0%, transparent 50%);
    animation: hologramPulse 4s ease-in-out infinite;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero-text-container {
    z-index: 2;
}

.hero-title {
    font-family: var(--font-primary);
    font-size: var(--font-size-6xl);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.title-line {
    display: block;
    font-size: var(--font-size-xl);
    color: var(--color-neon-green);
    text-shadow: var(--shadow-neon);
    margin-bottom: var(--spacing-sm);
}

.title-main {
    display: block;
    background: var(--gradient-neon);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: titleGlow 3s ease-in-out infinite;
}

.title-year {
    display: block;
    font-size: var(--font-size-5xl);
    color: var(--color-cyber-pink);
    text-shadow: var(--shadow-neon-strong);
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-silver-gray);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.6;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.cta-button {
    padding: var(--spacing-md) var(--spacing-xl);
    font-family: var(--font-secondary);
    font-size: var(--font-size-base);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-normal);
}

.cta-button.primary {
    background: transparent;
    color: var(--color-electric-blue);
    border: 2px solid var(--color-electric-blue);
    box-shadow: var(--shadow-neon);
}

.cta-button.primary:hover {
    background: var(--color-electric-blue);
    color: var(--color-deep-black);
    box-shadow: var(--shadow-neon-intense);
    transform: translateY(-2px);
}

.cta-button.secondary {
    background: transparent;
    color: var(--color-neon-green);
    border: 2px solid var(--color-neon-green);
}

.cta-button.secondary:hover {
    background: var(--color-neon-green);
    color: var(--color-deep-black);
    box-shadow: 0 0 15px var(--color-neon-green);
}

.btn-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: radial-gradient(circle, rgba(0, 255, 255, 0.5) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    transition: all var(--transition-slow);
    pointer-events: none;
}

.cta-button:hover .btn-glow {
    width: 200px;
    height: 200px;
}

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

.hud-interface {
    width: 300px;
    height: 200px;
    background: rgba(0, 31, 63, 0.3);
    border: 1px solid var(--color-electric-blue);
    border-radius: 8px;
    padding: var(--spacing-lg);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-neon);
}

.hud-screen {
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    border-radius: 4px;
    padding: var(--spacing-md);
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
}

.scan-line {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--color-neon-green);
    animation: scan 2s linear infinite;
    box-shadow: 0 0 10px var(--color-neon-green);
}

.hud-data {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.data-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.data-label {
    color: var(--color-silver-gray);
}

.data-value {
    color: var(--color-electric-blue);
    font-weight: 600;
}

.data-value.online {
    color: var(--color-neon-green);
    animation: blink 1s infinite;
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid var(--color-electric-blue);
    border-bottom: 2px solid var(--color-electric-blue);
    transform: rotate(45deg);
    animation: bounce 2s infinite;
}

.scroll-text {
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--color-silver-gray);
    letter-spacing: 1px;
}

/* ============================================ */
/* セクション共通スタイル */
/* ============================================ */

.section {
    padding: var(--spacing-3xl) 0;
    position: relative;
}

.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-title {
    font-family: var(--font-primary);
    font-size: var(--font-size-4xl);
    font-weight: 900;
    margin-bottom: var(--spacing-lg);
    text-transform: uppercase;
}

.title-prefix {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--color-neon-green);
    font-family: var(--font-mono);
    margin-bottom: var(--spacing-sm);
    letter-spacing: 2px;
}

.title-main {
    display: block;
    color: var(--color-white);
    text-shadow: var(--shadow-neon);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-silver-gray);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* ============================================ */
/* 問題提起セクション */
/* ============================================ */

.problem-section {
    background: linear-gradient(180deg, var(--color-deep-black) 0%, var(--color-midnight-blue) 100%);
}

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

.problem-card {
    background: rgba(42, 10, 42, 0.3);
    border: 1px solid rgba(255, 0, 255, 0.2);
    border-radius: 8px;
    padding: var(--spacing-xl);
    text-align: center;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.problem-card::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: var(--gradient-neon);
    border-radius: 8px;
    opacity: 0;
    z-index: -1;
    transition: opacity var(--transition-normal);
}

.problem-card:hover::before {
    opacity: 0.3;
}

.problem-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(255, 0, 255, 0.2);
}

.card-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-lg);
    position: relative;
}

.circuit-pattern {
    width: 100%;
    height: 100%;
    background: 
        linear-gradient(90deg, transparent 40%, var(--color-electric-blue) 50%, transparent 60%),
        linear-gradient(0deg, transparent 40%, var(--color-electric-blue) 50%, transparent 60%);
    background-size: 10px 10px;
    animation: circuitFlow 2s linear infinite;
}

.glitch-effect {
    width: 100%;
    height: 100%;
    background: var(--color-cyber-pink);
    position: relative;
    overflow: hidden;
}

.glitch-effect::before,
.glitch-effect::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-cyber-pink);
}

.glitch-effect::before {
    animation: glitch-1 0.3s infinite;
}

.glitch-effect::after {
    animation: glitch-2 0.3s infinite;
}

.warning-symbol {
    width: 100%;
    height: 100%;
    background: var(--color-bright-yellow);
    clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
    position: relative;
}

.warning-symbol::before {
    content: '!';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--color-deep-black);
    font-weight: 900;
    font-size: var(--font-size-xl);
}

.card-title {
    font-family: var(--font-primary);
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
}

.card-text {
    color: var(--color-silver-gray);
    line-height: 1.6;
}

/* ============================================ */
/* ソリューションセクション */
/* ============================================ */

.solution-section {
    background: linear-gradient(180deg, var(--color-midnight-blue) 0%, var(--color-dark-purple) 100%);
}

.solution-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    margin-bottom: var(--spacing-3xl);
}

.showcase-visual {
    position: relative;
    height: 400px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid rgba(0, 255, 255, 0.2);
}

.neural-network {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 20%, var(--color-electric-blue) 2px, transparent 2px),
        radial-gradient(circle at 80% 30%, var(--color-cyber-pink) 2px, transparent 2px),
        radial-gradient(circle at 40% 70%, var(--color-neon-green) 2px, transparent 2px);
    background-size: 50px 50px;
    animation: neuralPulse 3s ease-in-out infinite;
}

.data-stream {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        linear-gradient(45deg, transparent 30%, rgba(0, 255, 255, 0.1) 50%, transparent 70%),
        linear-gradient(-45deg, transparent 30%, rgba(255, 0, 255, 0.1) 50%, transparent 70%);
    animation: dataFlow 2s linear infinite;
}

.features-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.feature-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(0, 31, 63, 0.2);
    border-radius: 8px;
    border: 1px solid rgba(0, 255, 255, 0.1);
    transition: all var(--transition-normal);
}

.feature-item:hover {
    border-color: var(--color-electric-blue);
    box-shadow: var(--shadow-neon);
}

.feature-icon {
    width: 50px;
    height: 50px;
    flex-shrink: 0;
    position: relative;
}

.pulse-effect {
    width: 100%;
    height: 100%;
    background: var(--color-electric-blue);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.evolution-effect {
    width: 100%;
    height: 100%;
    background: var(--color-neon-green);
    border-radius: 50%;
    position: relative;
    overflow: hidden;
}

.evolution-effect::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: var(--color-white);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    animation: evolution 3s infinite;
}

.shield-effect {
    width: 100%;
    height: 100%;
    background: var(--color-cyber-pink);
    clip-path: polygon(50% 0%, 100% 38%, 82% 100%, 18% 100%, 0% 38%);
    animation: shieldPulse 2s infinite;
}

.sync-effect {
    width: 100%;
    height: 100%;
    background: var(--color-bright-yellow);
    position: relative;
}

.sync-effect::before,
.sync-effect::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100%;
    height: 2px;
    background: var(--color-deep-black);
    transform: translate(-50%, -50%);
}

.sync-effect::before {
    transform: translate(-50%, -50%) rotate(90deg);
}

.feature-content {
    flex: 1;
}

.feature-title {
    font-family: var(--font-primary);
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
}

.feature-desc {
    font-size: var(--font-size-sm);
    color: var(--color-silver-gray);
    margin-bottom: var(--spacing-xs);
}

.feature-spec {
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--color-neon-green);
}

/* ============================================ */
/* テクノロジーセクション */
/* ============================================ */

.technology-section {
    background: linear-gradient(180deg, var(--color-dark-purple) 0%, var(--color-deep-black) 100%);
}

.tech-diagram {
    margin-bottom: var(--spacing-3xl);
}

.diagram-container {
    position: relative;
    height: 400px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 12px;
    border: 1px solid rgba(255, 0, 255, 0.2);
    overflow: hidden;
}

.circuit-board {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.circuit-line {
    position: absolute;
    background: var(--color-electric-blue);
    box-shadow: var(--shadow-neon);
}

.circuit-line:nth-child(1) {
    top: 20%;
    left: 10%;
    width: 80%;
    height: 1px;
    animation: circuitFlow 3s linear infinite;
}

.circuit-line:nth-child(2) {
    top: 50%;
    left: 5%;
    width: 90%;
    height: 1px;
    animation: circuitFlow 3s linear infinite 1s;
}

.circuit-line:nth-child(3) {
    top: 80%;
    left: 15%;
    width: 70%;
    height: 1px;
    animation: circuitFlow 3s linear infinite 2s;
}

.circuit-node {
    position: absolute;
    width: 8px;
    height: 8px;
    background: var(--color-neon-green);
    border-radius: 50%;
    box-shadow: var(--shadow-neon);
    animation: nodePulse 2s infinite;
}

.circuit-node:nth-child(4) {
    top: 20%;
    left: 10%;
}

.circuit-node:nth-child(5) {
    top: 50%;
    left: 50%;
}

.circuit-node:nth-child(6) {
    top: 80%;
    left: 85%;
}

.tech-layers {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    padding: var(--spacing-xl);
}

.layer-item {
    background: rgba(0, 31, 63, 0.4);
    border-left: 3px solid var(--color-electric-blue);
    padding: var(--spacing-md);
    border-radius: 4px;
    transition: all var(--transition-normal);
}

.layer-item:hover {
    background: rgba(0, 31, 63, 0.6);
    transform: translateX(10px);
}

.layer-title {
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    color: var(--color-electric-blue);
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
}

.layer-desc {
    font-size: var(--font-size-sm);
    color: var(--color-silver-gray);
}

.tech-specs {
    display: flex;
    justify-content: center;
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    max-width: 800px;
    width: 100%;
}

.spec-item {
    text-align: center;
    padding: var(--spacing-lg);
    background: rgba(42, 10, 42, 0.3);
    border: 1px solid rgba(255, 0, 255, 0.2);
    border-radius: 8px;
    transition: all var(--transition-normal);
}

.spec-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(255, 0, 255, 0.2);
}

.spec-label {
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--color-silver-gray);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.spec-value {
    font-family: var(--font-primary);
    font-size: var(--font-size-2xl);
    font-weight: 900;
    color: var(--color-electric-blue);
    text-shadow: var(--shadow-neon);
}

/* ============================================ */
/* ロードマップセクション */
/* ============================================ */

.roadmap-section {
    background: linear-gradient(180deg, var(--color-deep-black) 0%, var(--color-midnight-blue) 100%);
}

.timeline-container {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline-line {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: linear-gradient(to bottom, var(--color-electric-blue), var(--color-cyber-pink));
    box-shadow: var(--shadow-neon);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-3xl);
    display: flex;
    align-items: center;
}

.timeline-item:nth-child(odd) {
    flex-direction: row;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-marker {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 16px;
    height: 16px;
    background: var(--color-neon-green);
    border-radius: 50%;
    border: 3px solid var(--color-deep-black);
    box-shadow: var(--shadow-neon);
    z-index: 2;
}

.timeline-content {
    width: 45%;
    padding: var(--spacing-lg);
    background: rgba(0, 31, 63, 0.3);
    border: 1px solid rgba(0, 255, 255, 0.2);
    border-radius: 8px;
    transition: all var(--transition-normal);
}

.timeline-item:hover .timeline-content {
    border-color: var(--color-electric-blue);
    box-shadow: var(--shadow-neon);
}

.timeline-title {
    font-family: var(--font-primary);
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
}

.timeline-desc {
    color: var(--color-silver-gray);
    margin-bottom: var(--spacing-md);
}

.timeline-date {
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    color: var(--color-neon-green);
    margin-bottom: var(--spacing-sm);
}

.timeline-status {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.timeline-status.completed {
    background: rgba(57, 255, 20, 0.2);
    color: var(--color-neon-green);
    border: 1px solid var(--color-neon-green);
}

.timeline-status.active {
    background: rgba(0, 255, 255, 0.2);
    color: var(--color-electric-blue);
    border: 1px solid var(--color-electric-blue);
}

.timeline-status.pending {
    background: rgba(128, 128, 128, 0.2);
    color: var(--color-silver-gray);
    border: 1px solid var(--color-silver-gray);
}

/* ============================================ */
/* CTAセクション */
/* ============================================ */

.cta-section {
    background: var(--gradient-dark);
    padding: var(--spacing-3xl) 0;
}

.cta-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.cta-title {
    margin-bottom: var(--spacing-lg);
}

.cta-title .title-main {
    display: block;
    font-family: var(--font-primary);
    font-size: var(--font-size-4xl);
    font-weight: 900;
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    text-shadow: var(--shadow-neon);
}

.cta-title .title-sub {
    display: block;
    font-size: var(--font-size-xl);
    color: var(--color-cyber-pink);
    text-shadow: var(--shadow-neon);
}

.cta-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-silver-gray);
    margin-bottom: var(--spacing-2xl);
}

.countdown {
    font-family: var(--font-mono);
    font-size: var(--font-size-2xl);
    color: var(--color-neon-green);
    text-shadow: var(--shadow-neon);
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    margin-bottom: var(--spacing-3xl);
    flex-wrap: wrap;
}

.cta-button.large {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: var(--font-size-lg);
}

.btn-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.cta-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-xl);
    max-width: 600px;
    margin: 0 auto;
}

.stat-item {
    text-align: center;
    padding: var(--spacing-lg);
    background: rgba(0, 31, 63, 0.3);
    border: 1px solid rgba(0, 255, 255, 0.2);
    border-radius: 8px;
    transition: all var(--transition-normal);
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-neon);
}

.stat-number {
    font-family: var(--font-primary);
    font-size: var(--font-size-3xl);
    font-weight: 900;
    color: var(--color-electric-blue);
    text-shadow: var(--shadow-neon);
    margin-bottom: var(--spacing-sm);
}

.stat-label {
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--color-silver-gray);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ============================================ */
/* フッター */
/* ============================================ */

.footer {
    background: var(--color-deep-black);
    border-top: 1px solid rgba(0, 255, 255, 0.1);
    padding: var(--spacing-xl) 0 var(--spacing-lg);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    align-items: center;
}

.footer-logo {
    display: flex;
    align-items: baseline;
    gap: var(--spacing-xs);
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
}

.footer-link {
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    color: var(--color-silver-gray);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all var(--transition-normal);
}

.footer-link:hover {
    color: var(--color-electric-blue);
    text-shadow: var(--shadow-neon);
}

.footer-social {
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
}

.social-link {
    width: 40px;
    height: 40px;
    border: 1px solid var(--color-electric-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
}

.social-link:hover {
    background: var(--color-electric-blue);
    box-shadow: var(--shadow-neon);
    transform: translateY(-2px);
}

.social-icon {
    width: 20px;
    height: 20px;
    background: var(--color-electric-blue);
    mask-size: contain;
    mask-repeat: no-repeat;
    mask-position: center;
}

.social-link[data-platform="twitter"] .social-icon {
    mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M23 3a10.9 10.9 0 0 1-3.14 1.53 4.48 4.48 0 0 0-7.86 3v1A10.66 10.66 0 0 1 3 4s-4 9 5 13a11.64 11.64 0 0 1-7 2c9 5 20 0 20-11.5a4.5 4.5 0 0 0-.08-.83A7.72 7.72 0 0 0 23 3z'/%3E%3C/svg%3E");
}

.social-link[data-platform="discord"] .social-icon {
    mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M20.317 4.3698a19.7913 19.7913 0 00-4.8851-1.5152.0741.0741 0 00-.0785.0371c-.211.3753-.4447.8648-.6083 1.2495-1.8447-.2762-3.68-.2762-5.4868 0-.1636-.3933-.4058-.8742-.6177-1.2495a.077.077 0 00-.0785-.037 19.7363 19.7363 0 00-4.8852 1.515.0699.0699 0 00-.0321.0277C.5334 9.0458-.319 13.5799.0992 18.0578a.0824.0824 0 00.0312.0561c2.0528 1.5076 4.0413 2.4228 5.9929 3.0294a.0777.0777 0 00.0842-.0276c.4616-.6304.8731-1.2952 1.226-1.9942a.076.076 0 00-.0416-.1057c-.6528-.2476-1.2743-.5495-1.8722-.8923a.077.077 0 01-.0076-.1277c.1258-.0943.2517-.1923.3718-.2914a.0743.0743 0 01.0776-.0105c3.9278 1.7933 8.18 1.7933 12.0614 0a.0739.0739 0 01.0785.0095c.1202.099.246.1981.3728.2924a.077.077 0 01-.0066.1276 12.2986 12.2986 0 01-1.873.8914.0766.0766 0 00-.0407.1067c.3604.698.7719 1.3628 1.225 1.9932a.076.076 0 00.0842.0286c1.961-.6067 3.9495-1.5219 6.0023-3.0294a.077.077 0 00.0313-.0552c.5004-5.177-.8382-9.6739-3.5485-13.6604a.061.061 0 00-.0312-.0286zM8.02 15.3312c-1.1825 0-2.1569-1.0857-2.1569-2.419 0-1.3332.9555-2.4189 2.157-2.4189 1.2108 0 2.1757 1.0952 2.1568 2.419 0 1.3332-.9555 2.4189-2.1569 2.4189zm7.9748 0c-1.1825 0-2.1569-1.0857-2.1569-2.419 0-1.3332.9554-2.4189 2.1569-2.4189 1.2108 0 2.1757 1.0952 2.1568 2.419 0 1.3332-.946 2.4189-2.1568 2.4189Z'/%3E%3C/svg%3E");
}

.social-link[data-platform="github"] .social-icon {
    mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M12 0c-6.626 0-12 5.373-12 12 0 5.302 3.438 9.8 8.207 11.387.599.111.793-.261.793-.577v-2.234c-3.338.726-4.033-1.416-4.033-1.416-.546-1.387-1.333-1.756-1.333-1.756-1.089-.745.083-.729.083-.729 1.205.084 1.839 1.237 1.839 1.237 1.07 1.834 2.807 1.304 3.492.997.107-.775.418-1.305.762-1.604-2.665-.305-5.467-1.334-5.467-5.931 0-1.311.469-2.381 1.236-3.221-.124-.303-.535-1.524.117-3.176 0 0 1.008-.322 3.301 1.23.957-.266 1.983-.399 3.003-.404 1.02.005 2.047.138 3.006.404 2.291-1.552 3.297-1.23 3.297-1.23.653 1.653.242 2.874.118 3.176.77.84 1.235 1.911 1.235 3.221 0 4.609-2.807 5.624-5.479 5.921.43.372.823 1.102.823 2.222v3.293c0 .319.192.694.801.576 4.765-1.589 8.199-6.086 8.199-11.386 0-6.627-5.373-12-12-12z'/%3E%3C/svg%3E");
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(0, 255, 255, 0.1);
}

.copyright {
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--color-silver-gray);
}

.system-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    animation: blink 1s infinite;
}

.status-indicator.online {
    background: var(--color-neon-green);
    box-shadow: 0 0 10px var(--color-neon-green);
}

.status-text {
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--color-neon-green);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ============================================ */
/* アニメーション定義 */
/* ============================================ */

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@keyframes titleGlow {
    0%, 100% { 
        filter: brightness(1) drop-shadow(0 0 20px var(--color-electric-blue));
    }
    50% { 
        filter: brightness(1.2) drop-shadow(0 0 30px var(--color-electric-blue));
    }
}

@keyframes float {
    0%, 100% { transform: translateY(0px) translateX(0px); }
    25% { transform: translateY(-10px) translateX(5px); }
    50% { transform: translateY(0px) translateX(10px); }
    75% { transform: translateY(10px) translateX(5px); }
}

@keyframes hologramPulse {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.6; }
}

@keyframes scan {
    0% { top: 0; }
    100% { top: 100%; }
}

@keyframes bounce {
    0%, 100% { transform: translateY(0) rotate(45deg); }
    50% { transform: translateY(-10px) rotate(45deg); }
}

@keyframes circuitFlow {
    0% { background-position: 0 0; }
    100% { background-position: 20px 20px; }
}

@keyframes neuralPulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

@keyframes dataFlow {
    0% { background-position: 0 0; }
    100% { background-position: 40px 40px; }
}

@keyframes nodePulse {
    0%, 100% { 
        transform: scale(1);
        box-shadow: 0 0 10px var(--color-neon-green);
    }
    50% { 
        transform: scale(1.2);
        box-shadow: 0 0 20px var(--color-neon-green);
    }
}

@keyframes evolution {
    0% { width: 0; height: 0; opacity: 1; }
    100% { width: 100%; height: 100%; opacity: 0; }
}

@keyframes shieldPulse {
    0%, 100% { 
        filter: brightness(1);
        box-shadow: 0 0 10px var(--color-cyber-pink);
    }
    50% { 
        filter: brightness(1.5);
        box-shadow: 0 0 20px var(--color-cyber-pink);
    }
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

@keyframes glitch-1 {
    0% { transform: translate(0); }
    20% { transform: translate(-2px, 2px); }
    40% { transform: translate(-2px, -2px); }
    60% { transform: translate(2px, 2px); }
    80% { transform: translate(2px, -2px); }
    100% { transform: translate(0); }
}

@keyframes glitch-2 {
    0% { transform: translate(0); }
    20% { transform: translate(2px, -2px); }
    40% { transform: translate(2px, 2px); }
    60% { transform: translate(-2px, -2px); }
    80% { transform: translate(-2px, 2px); }
    100% { transform: translate(0); }
}

@keyframes timelineSlide {
    0% { 
        opacity: 0;
        transform: translateX(-30px);
    }
    100% { 
        opacity: 1;
        transform: translateX(0);
    }
}

/* ============================================ */
/* レスポンシブデザイン */
/* ============================================ */

@media (max-width: 768px) {
    :root {
        --font-size-6xl: 2.5rem;
        --font-size-5xl: 2rem;
        --font-size-4xl: 1.75rem;
        --font-size-3xl: 1.5rem;
    }

    .nav-menu {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-visual {
        order: -1;
        margin-bottom: var(--spacing-xl);
    }

    .solution-showcase {
        grid-template-columns: 1fr;
    }

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

    .timeline-item:nth-child(odd),
    .timeline-item:nth-child(even) {
        flex-direction: column;
    }

    .timeline-line {
        left: 20px;
    }

    .timeline-marker {
        left: 20px;
    }

    .timeline-content {
        width: calc(100% - 60px);
        margin-left: 60px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-lg);
    }

    .footer-social {
        justify-content: center;
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }

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

    .cta-button {
        width: 100%;
        max-width: 300px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: var(--font-size-4xl);
    }

    .title-year {
        font-size: var(--font-size-3xl);
    }

    .hud-interface {
        width: 250px;
        height: 150px;
    }

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

    .cta-stats {
        grid-template-columns: 1fr;
    }
}

/* ============================================ */
/* パフォーマンス最適化 */
/* ============================================ */

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ハードウェアアクセラレーション */
.particle,
.digital-rain,
.hologram-effect,
.neural-network,
.data-stream {
    will-change: transform;
}

/* 画像の遅延読み込み */
img {
    content-visibility: auto;
}

/* クリティカルCSSのインライン化 */
body {
    font-display: swap;
}

/* ============================================ */
/* アクセシビリティ */
/* ============================================ */

/* キーボードナビゲーション */
a:focus,
button:focus {
    outline: 2px solid var(--color-electric-blue);
    outline-offset: 2px;
}

/* スクリーンリーダー用の非表示コンテンツ */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* 高コントラストモード対応 */
@media (prefers-contrast: high) {
    :root {
        --color-silver-gray: #FFFFFF;
        --color-deep-black: #000000;
    }
}