/* AMD風スタイルシート - モダンでプロフェッショナルなデザイン */

/* CSS変数定義 - ダークテーマ */
:root {
    /* HaiChatブランドカラー - ダークテーマ（アクセシビリティ対応） */
    --haichat-blue: #7b8eff; /* コントラスト改善 */
    --haichat-dark-blue: #6a7dff; /* コントラスト改善 */
    --haichat-purple: #9b6dd8; /* コントラスト改善 */
    --haichat-dark-purple: #8a5cd8; /* コントラスト改善 */
    --haichat-black: #000000;
    --haichat-dark-gray: #0f0f0f;
    --haichat-gray: #1a1a1a;
    --haichat-medium-gray: #2a2a2a;
    --haichat-light-gray: #404040;
    --haichat-text-light: #ffffff;
    --haichat-text-muted: #c0c0c0; /* コントラスト改善 */
    --haichat-white: #ffffff;
    --haichat-off-white: #f8f9fa;
    
    /* グラデーション - ダークテーマ（アクセシビリティ対応） */
    --gradient-primary: linear-gradient(135deg, #7b8eff 0%, #9b6dd8 100%);
    --gradient-dark: linear-gradient(135deg, #0f0f0f 0%, #1a1a1a 50%, #0f0f0f 100%);
    --gradient-card: linear-gradient(135deg, #1e1e1e 0%, #2a2a2a 100%);
    --gradient-hero: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 50%, #1a1a1a 100%);
    
    /* フォント */
    --font-primary: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-heading: 'Arial', sans-serif;
    
    /* スペーシング */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
    
    /* ボーダー半径 */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;
    
    /* シャドウ - ダークテーマ */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 12px 24px rgba(0, 0, 0, 0.6);
    
    /* トランジション */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* 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-primary);
    line-height: 1.6;
    color: var(--haichat-text-light);
    background: var(--gradient-dark);
    overflow-x: hidden;
    min-height: 100vh;
}

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

/* ヘッダー - ダークテーマ */
.header {
    background: var(--gradient-dark);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-lg);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: var(--transition-normal);
    border-bottom: 1px solid var(--haichat-light-gray);
}

.navbar {
    padding: var(--spacing-sm) 0;
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.nav-brand {
    flex-shrink: 0;
    order: 1;
}

.nav-brand .logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--haichat-white);
    font-weight: bold;
    font-size: 1.2rem;
    white-space: nowrap;
    padding: var(--spacing-xs) 0;
    gap: var(--spacing-sm);
    flex-direction: row;
    justify-content: flex-start;
}

.logo-img {
    height: 45px;
    width: auto;
    transition: var(--transition-fast);
}

.logo-img:hover {
    transform: scale(1.05);
}

.hai-logo {
    height: 45px;
    width: auto;
    margin-right: var(--spacing-xs);
}

.company-logo {
    height: 45px;
    width: auto;
    transform: translateY(6px);
}

.nav-menu {
    display: flex;
    align-items: center;
    min-width: 0;
    flex: 1;
    justify-content: center;
    order: 2;
    margin: 0 var(--spacing-md);
}

.nav-list {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    flex-wrap: nowrap;
    align-items: center;
}

.nav-item {
    position: relative;
    margin: 0 var(--spacing-xs);
    white-space: nowrap;
}

.nav-link {
    text-decoration: none;
    color: var(--haichat-white);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    transition: var(--transition-fast);
    position: relative;
    font-size: 0.9rem;
    letter-spacing: 0.2px;
    white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
    color: var(--haichat-blue);
    background-color: rgba(37, 99, 235, 0.1);
}

/* ドロップダウンメニュー */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--haichat-dark-gray);
    box-shadow: var(--shadow-lg);
    border-radius: var(--border-radius-md);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition-normal);
    z-index: 1001;
    border: 1px solid #333;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-link {
    display: block;
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--haichat-white);
    text-decoration: none;
    border-bottom: 1px solid #333;
    transition: var(--transition-fast);
    font-size: 0.95rem;
    letter-spacing: 0.3px;
}

.dropdown-link:hover {
    background-color: #333;
    color: var(--haichat-blue);
}

.dropdown-link:last-child {
    border-bottom: none;
}

/* 検索ボックス */
.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-shrink: 0;
    order: 3;
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.search-input {
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 2px solid #333;
    border-radius: var(--border-radius-md);
    width: 220px;
    background: var(--haichat-dark-gray);
    color: var(--haichat-white);
    transition: var(--transition-fast);
    font-size: 0.9rem;
    letter-spacing: 0.2px;
}

.search-input:focus {
    outline: none;
    border-color: var(--haichat-blue);
}

.search-btn {
    background: var(--haichat-blue);
    color: var(--haichat-white);
    border: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-md);
    cursor: pointer;
    margin-left: var(--spacing-xs);
    transition: var(--transition-fast);
    font-size: 0.9rem;
}

.search-btn:hover {
    background: var(--haichat-dark-blue);
}

/* モバイルメニュー */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.hamburger {
    width: 25px;
    height: 3px;
    background: var(--haichat-white);
    margin: 3px 0;
    transition: var(--transition-fast);
}

/* 検索結果 */
.search-results {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--haichat-dark-gray);
    box-shadow: var(--shadow-lg);
    border-radius: var(--border-radius-md);
    margin-top: var(--spacing-xs);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition-normal);
    border: 1px solid #333;
}

.search-results.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.search-results-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
}

/* 通知バナー */
.notification-banner {
    background: var(--gradient-primary);
    color: var(--haichat-white);
    padding: var(--spacing-sm) 0;
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    z-index: 999;
    transform: translateY(-100%);
    transition: var(--transition-normal);
}

.notification-banner.show {
    transform: translateY(0);
}

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

.notification-close {
    background: none;
    border: none;
    color: var(--haichat-white);
    cursor: pointer;
    font-size: 1.2rem;
}

/* メインコンテンツ */
main {
    margin-top: 70px;
}

/* ヒーローセクション */
.hero {
    background: var(--gradient-dark);
    color: var(--haichat-white);
    padding: var(--spacing-xxl) 0;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 600px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, 
        rgba(102, 126, 234, 0.1) 0%, 
        rgba(118, 75, 162, 0.1) 25%, 
        rgba(102, 126, 234, 0.1) 50%, 
        rgba(118, 75, 162, 0.1) 75%, 
        rgba(102, 126, 234, 0.1) 100%);
    background-size: 400% 400%;
    animation: gradientShift 8s ease-in-out infinite;
    z-index: 1;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    position: relative;
    z-index: 2;
    animation: fadeInUp 1s ease-out;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: bold;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
    animation: slideInLeft 1.2s ease-out 0.2s both;
}

.hero-content h2 {
    animation: slideInRight 1.2s ease-out 0.4s both;
}

.hero-content p {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
    line-height: 1.6;
    animation: fadeInUp 1s ease-out 0.6s both;
}

.hero-content-bottom {
    animation: fadeInUp 1s ease-out 0.8s both;
}


.hero-content-bottom {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
    flex-wrap: wrap;
    padding: var(--spacing-lg);
    border: 2px solid var(--haichat-blue);
    border-radius: var(--border-radius-lg);
    background: rgba(102, 126, 234, 0.1);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    max-width: 1500px;
    width: 100%;
    margin-left: auto;
    margin-right: auto;
}

.hero-content-bottom:hover {
    border-color: var(--haichat-purple);
    background: rgba(102, 126, 234, 0.15);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.hero-image {
    flex-shrink: 0;
}

.hero-image img {
    max-width: 270px;
    height: auto;
    opacity: 0.8;
    transition: var(--transition-normal);
    animation: float 3s ease-in-out infinite;
}

.hero-image img:hover {
    opacity: 1;
    transform: scale(1.05);
    animation-play-state: paused;
}

.hero-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: center;
}

.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius-md);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-fast);
    border: 2px solid transparent;
    cursor: pointer;
}

.btn-primary {
    background: var(--haichat-blue);
    color: var(--haichat-white);
}

.btn-primary:hover {
    background: var(--haichat-dark-blue);
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--haichat-white);
    border-color: var(--haichat-white);
}

.btn-secondary:hover {
    background: var(--haichat-white);
    color: var(--haichat-black);
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 8px 25px rgba(255, 255, 255, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--haichat-blue);
    border-color: var(--haichat-blue);
}

.btn-outline:hover {
    background: var(--haichat-blue);
    color: var(--haichat-white);
}


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

section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: var(--spacing-xl);
    color: var(--haichat-white);
}

/* 機能セクション */
.features {
    background: var(--haichat-dark-gray);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.feature-card {
    background: var(--haichat-dark-gray);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    border: 1px solid #333;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.feature-image {
    height: 200px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--border-radius-md) var(--border-radius-md) 0 0;
    padding: var(--spacing-md);
    border: 2px solid rgba(102, 126, 234, 0.3);
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.2);
}

.feature-image img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    transition: var(--transition-normal);
    border-radius: var(--border-radius-sm);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.feature-card:hover .feature-image img {
    transform: scale(1.05);
}

.feature-info {
    padding: var(--spacing-lg);
}

.feature-info h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--haichat-white);
}

.feature-info p {
    margin-bottom: var(--spacing-md);
    color: var(--haichat-white);
}

.feature-info ul {
    list-style: none;
    margin-bottom: var(--spacing-lg);
}

.feature-info li {
    padding: var(--spacing-xs) 0;
    position: relative;
    padding-left: var(--spacing-md);
}

.feature-info li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--haichat-blue);
    font-weight: bold;
}

/* 技術仕様セクション */
.tech-specs {
    background: var(--haichat-black);
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}

.spec-item {
    text-align: center;
    padding: var(--spacing-lg);
}

.spec-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
}

.spec-icon i {
    font-size: 2rem;
    color: var(--haichat-white);
}

.spec-item h3 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-sm);
    color: var(--haichat-white);
}

.spec-item p {
    color: var(--haichat-white);
}

/* ニュースセクション */
.news {
    background: var(--haichat-dark-gray);
}

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

.news-item {
    background: var(--haichat-dark-gray);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    border: 1px solid #333;
}

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

.news-image {
    height: 240px;
    overflow: hidden;
    border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
    position: relative;
}

.news-image::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
}

.news-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-normal);
}

.news-item:hover .news-image img {
    transform: scale(1.05);
}

.news-content {
    padding: var(--spacing-lg);
    position: relative;
}

.news-category {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.category-tag {
    background: var(--haichat-blue);
    color: var(--haichat-white);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
}

.news-date {
    color: var(--haichat-light-gray);
    font-size: 0.85rem;
}

.news-content h3 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-sm);
    color: var(--haichat-white);
    line-height: 1.4;
}

.news-content p {
    color: var(--haichat-white);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.news-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.read-more {
    color: var(--haichat-blue);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
}

.read-more::after {
    content: '→';
    margin-left: var(--spacing-xs);
    transition: var(--transition-fast);
}

.read-more:hover::after {
    transform: translateX(4px);
}

.news-stats {
    display: flex;
    gap: var(--spacing-sm);
    color: var(--haichat-light-gray);
    font-size: 0.85rem;
}

.news-stats span {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.read-more:hover {
    text-decoration: underline;
}

/* フッター - ダークテーマ */
.footer {
    background: var(--gradient-dark);
    color: var(--haichat-text-light);
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
    border-top: 1px solid var(--haichat-light-gray);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h4 {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-md);
    color: var(--haichat-text-light);
}

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

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

.footer-section a {
    color: var(--haichat-text-muted);
    text-decoration: none;
    transition: var(--transition-fast);
}

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

.social-links {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.social-link {
    width: 40px;
    height: 40px;
    background: var(--haichat-medium-gray);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--haichat-text-light);
    text-decoration: none;
    transition: var(--transition-fast);
    border: 1px solid var(--haichat-light-gray);
}

.social-link:hover {
    background: var(--haichat-blue);
    transform: translateY(-2px);
}

.newsletter h5 {
    margin-bottom: var(--spacing-xs);
    color: var(--haichat-white);
}

.newsletter p {
    color: #ccc;
    margin-bottom: var(--spacing-md);
    font-size: 0.9rem;
}

.newsletter-form {
    display: flex;
    gap: var(--spacing-xs);
}

.newsletter-input {
    flex: 1;
    padding: var(--spacing-xs);
    border: 1px solid #555;
    border-radius: var(--border-radius-sm);
    background: var(--haichat-gray);
    color: var(--haichat-white);
}

.newsletter-input::placeholder {
    color: #999;
}

.newsletter-btn {
    background: var(--haichat-blue);
    color: var(--haichat-white);
    border: none;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition-fast);
}

.newsletter-btn:hover {
    background: var(--haichat-dark-blue);
}

.footer-bottom {
    border-top: 1px solid #333;
    padding-top: var(--spacing-lg);
}

.footer-bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-links {
    display: flex;
    gap: var(--spacing-md);
}

.footer-links a {
    color: #999;
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

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

.footer-copyright p {
    color: #999;
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
}

/* ページトップボタン */
.scroll-to-top {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 50px;
    height: 50px;
    background: var(--haichat-blue);
    color: var(--haichat-white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
    z-index: 1000;
}

.scroll-to-top.show {
    opacity: 1;
    visibility: visible;
}

.scroll-to-top:hover {
    background: var(--haichat-dark-blue);
    transform: translateY(-2px);
}

/* クッキーバナー */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--haichat-dark-gray);
    border-top: 1px solid #333;
    padding: var(--spacing-lg) 0;
    z-index: 1000;
    transform: translateY(100%);
    transition: var(--transition-normal);
}

.cookie-banner.show {
    transform: translateY(0);
}

.cookie-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
}

.cookie-text h4 {
    margin-bottom: var(--spacing-xs);
    color: var(--haichat-white);
}

.cookie-text p {
    color: var(--haichat-light-gray);
    font-size: 0.9rem;
}

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

.cookie-accept,
.cookie-settings {
    padding: var(--spacing-xs) var(--spacing-md);
    border: none;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition-fast);
}

.cookie-accept {
    background: var(--haichat-blue);
    color: var(--haichat-white);
}

.cookie-accept:hover {
    background: var(--haichat-dark-blue);
}

.cookie-settings {
    background: transparent;
    color: var(--haichat-white);
    border: 1px solid #555;
}

.cookie-settings:hover {
    background: #333;
}

.cookie-policy {
    color: var(--haichat-blue);
    text-decoration: none;
    font-size: 0.9rem;
}

.cookie-policy:hover {
    text-decoration: underline;
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--haichat-black);
        flex-direction: column;
        justify-content: flex-start;
        padding: var(--spacing-md);
        transition: var(--transition-normal);
        box-shadow: var(--shadow-lg);
        margin: 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-list {
        flex-direction: column;
        width: 100%;
    }
    
    .nav-item {
        margin: var(--spacing-xs) 0;
        width: 100%;
    }
    
    .nav-link {
        display: block;
        padding: var(--spacing-sm);
        width: 100%;
    }
    
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: var(--haichat-dark-gray);
        margin-top: var(--spacing-xs);
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .search-input {
        width: 220px;
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.95rem;
    }
    
    .search-btn {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.95rem;
    }
    
    .nav-brand {
        order: 1;
    }
    
    .nav-brand .logo {
        font-size: 1rem;
    }
    
    .logo-img {
        height: 35px;
    }
    
    .hai-logo {
        height: 35px;
        margin-right: var(--spacing-xs);
    }
    
    .company-logo {
        height: 35px;
        transform: translateY(4px);
    }
    
    .nav-actions {
        order: 3;
    }
    
    .hero {
        padding: var(--spacing-xl) 0;
        min-height: 500px;
    }
    
    .hero-content {
        max-width: 100%;
        padding: 0 var(--spacing-md);
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-content p {
        font-size: 1.1rem;
    }
    
    .hero-content-bottom {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
    
    .hero-image img {
        max-width: 225px;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .product-grid {
        grid-template-columns: 1fr;
    }
    
    .specs-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
    
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom-content {
        flex-direction: column;
        text-align: center;
    }
    
    .cookie-content {
        flex-direction: column;
        text-align: center;
    }
    
    .cookie-actions {
        flex-wrap: wrap;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-xs);
    }
    
    .hero {
        min-height: 400px;
    }
    
    .hero-content {
        padding: 0 var(--spacing-sm);
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 200px;
        text-align: center;
    }
    
    .search-input {
        width: 160px;
        padding: var(--spacing-xs);
        font-size: 0.85rem;
    }
    
    .search-btn {
        padding: var(--spacing-xs);
        font-size: 0.9rem;
    }
    
    .nav-brand {
        order: 1;
    }
    
    .nav-brand .logo {
        font-size: 0.9rem;
    }
    
    .logo-img {
        height: 30px;
    }
    
    .hai-logo {
        height: 30px;
        margin-right: var(--spacing-xs);
    }
    
    .company-logo {
        height: 30px;
        transform: translateY(4px);
    }
    
    .nav-actions {
        order: 3;
    }
    
    .newsletter-form {
        flex-direction: column;
    }
    
    .newsletter-btn {
        width: 100%;
    }
}

/* アニメーション */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

/* ローディング状態 */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

/* アクセシビリティ */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* フォーカス状態（アクセシビリティ対応） */
:focus {
    outline: 3px solid var(--haichat-blue);
    outline-offset: 2px;
    box-shadow: 0 0 0 3px rgba(123, 142, 255, 0.4);
}

:focus:not(:focus-visible) {
    outline: none;
    box-shadow: none;
}

:focus-visible {
    outline: 3px solid var(--haichat-blue);
    outline-offset: 2px;
    box-shadow: 0 0 0 3px rgba(123, 142, 255, 0.4);
}

/* キーボードナビゲーション */
.keyboard-focus :focus {
    outline: 3px solid var(--haichat-blue);
    outline-offset: 2px;
    box-shadow: 0 0 0 3px rgba(123, 142, 255, 0.4);
    border-radius: 4px;
    transition: none !important;
}

/* スキップリンク */
.skip-link {
    position: fixed;
    top: -100%;
    left: 0;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--haichat-blue);
    color: var(--haichat-white);
    text-decoration: none;
    border-radius: 0 0 var(--border-radius-md) var(--border-radius-md);
    z-index: 9999;
    transition: top 0.2s ease;
}

.skip-link:focus {
    top: 0;
}

/* モーダルのフォーカストラップ */
[aria-modal="true"] {
    outline: none;
}

[aria-modal="true"] :focus {
    outline: 3px solid var(--haichat-blue);
    outline-offset: 2px;
}

[aria-hidden="true"] {
    display: none !important;
}

/* フォーカス順序の制御 */
[tabindex="-1"] {
    outline: none !important;
}

/* キーボード操作のガイド */
.keyboard-guide {
    position: fixed;
    bottom: var(--spacing-md);
    right: var(--spacing-md);
    background: var(--haichat-dark-gray);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    display: none;
}

.keyboard-focus .keyboard-guide {
    display: block;
}

.keyboard-guide kbd {
    background: var(--haichat-light-gray);
    color: var(--haichat-white);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    margin: 0 var(--spacing-xs);
    font-family: monospace;
    font-size: 0.9rem;
}

/* フォーカスインジケーター */
.focus-ring {
    position: absolute;
    pointer-events: none;
    border-radius: var(--border-radius-md);
    transition: all 0.2s ease;
    z-index: 1000;
}

/* アクセシビリティツリーの制御 */
[inert] {
    pointer-events: none;
    cursor: default;
    user-select: none;
    opacity: 0.5;
}

/* 高コントラストモード対応（アクセシビリティ改善） */
@media (prefers-contrast: high) {
    :root {
        /* 背景色の調整 */
        --haichat-gray: #000000;
        --haichat-dark-gray: #000000;
        --haichat-medium-gray: #000000;
        --haichat-light-gray: #333333;
        
        /* テキスト色の調整 */
        --haichat-text-light: #ffffff;
        --haichat-text-muted: #ffffff;
        
        /* アクセント色の調整 */
        --haichat-blue: #ffffff;
        --haichat-dark-blue: #ffffff;
        --haichat-purple: #ffffff;
        --haichat-dark-purple: #ffffff;
        
        /* グラデーションの無効化 */
        --gradient-primary: none;
        --gradient-dark: none;
        --gradient-card: none;
        --gradient-hero: none;
    }
    
    /* ボーダーの強調 */
    .btn,
    .card,
    .input,
    .dropdown-menu {
        border: 2px solid #ffffff !important;
    }
    
    /* フォーカス表示の強調 */
    :focus {
        outline: 4px solid #ffffff !important;
        outline-offset: 4px !important;
    }
    
    /* アイコンの視認性向上 */
    .icon {
        color: #ffffff !important;
        background: transparent !important;
    }
    
    /* テキストの視認性向上 */
    * {
        text-shadow: none !important;
    }
    
    /* アニメーションの無効化 */
    * {
        animation: none !important;
        transition: none !important;
    }
}