/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    color: #2c3e50;
}

.highlight {
    color: #3498db;
    font-weight: 700;
}

.highlight-text {
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: white;
    padding: 1.5rem;
    border-radius: 10px;
    text-align: center;
    font-size: 1.2rem;
    margin-top: 2rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: white;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #2980b9, #1f4e79);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.4);
}

.btn-secondary {
    background: transparent;
    color: #3498db;
    border: 2px solid #3498db;
}

.btn-secondary:hover {
    background: #3498db;
    color: white;
    transform: translateY(-2px);
}

.btn-large {
    padding: 15px 40px;
    font-size: 1.1rem;
}

.cta-button {
    background: #e74c3c;
    color: white !important;
    padding: 8px 20px;
    border-radius: 20px;
    transition: all 0.3s ease;
}

.cta-button:hover {
    background: #c0392b;
    transform: translateY(-1px);
}

/* Header */
header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.navbar {
    padding: 1rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo h1 {
    color: #3498db;
    font-size: 1.8rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-menu a:hover {
    color: #3498db;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger .bar {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}
/* Header Logo Styles */
.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.header-logo-img {
    height: 40px;
    width: auto;
    object-fit: contain;
    transition: transform 0.3s ease;
}

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

.nav-logo h1 {
    color: #3498db;
    font-size: 1.8rem;
    margin: 0;
}

/* ロゴ読み込み失敗時のフォールバック */
.header-logo-img:not([src]),
.header-logo-img[src=""] {
    display: none;
}

/* Footer Logo Styles */
.footer-logo {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
}

.footer-logo-img {
    height: 60px;
    width: auto;
    object-fit: contain;
    filter: none;
    transition: filter 0.3s ease;
}

.footer-logo-img:hover {
    filter: brightness(0) invert(1) drop-shadow(0 0 10px rgba(52, 152, 219, 0.5));
}

.footer-logo h3 {
    color: #3498db;
    margin: 0;
    font-size: 2rem;
}

.footer-logo p {
    margin: 0;
    color: #bdc3c7;
    font-size: 0.9rem;
}



/* ロゴ読み込み失敗時のフォールバック */
.footer-logo-img:not([src]),
.footer-logo-img[src=""],
.company-logo:not([src]),
.company-logo[src=""] {
    display: none;
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .nav-logo {
        gap: 0.5rem;
    }
    
    .header-logo-img {
        height: 32px;
    }
    
    .nav-logo h1 {
        font-size: 1.5rem;
    }
    
    .footer-logo-img {
        height: 50px;
    }
    
    .footer-logo h3 {
        font-size: 1.8rem;
    }
    
    .company-logos {
        justify-content: center;
    }
    
    .company-logo {
        height: 25px;
    }
}

@media (max-width: 480px) {
    .header-logo-img {
        height: 28px;
    }
    
    .nav-logo h1 {
        font-size: 1.3rem;
    }
    
    .footer-logo-img {
        height: 40px;
    }
    
    .footer-logo h3 {
        font-size: 1.5rem;
    }
    
    .company-logo {
        height: 20px;
    }
    
    .footer-logo {
        align-items: center;
        text-align: center;
    }
}

/* 高コントラストモード対応 */
@media (prefers-contrast: high) {
    .header-logo-img,
    .footer-logo-img,
    .company-logo {
        filter: contrast(1.5);
    }
}

/* Dark Mode対応（オプション） */
@media (prefers-color-scheme: dark) {
    .header-logo-img {
        filter: brightness(0) invert(1);
    }
}

/* Hero Section with Background Image */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

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

.hero-bg-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        135deg,
        rgba(102, 126, 234, 0.7) 0%,
        rgba(118, 75, 162, 0.6) 50%,
        rgba(0, 0, 0, 0.4) 100%
    );
    z-index: 2;
}

.hero-container {
    position: relative;
    z-index: 3;
    max-width: 1200px;
    margin: 0 auto;
    padding: 120px 20px 80px;
    width: 100%;
}

.hero-content {
    max-width: 600px;
    color: white;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    line-height: 1.2;
    font-weight: 700;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    opacity: 0.95;
    font-weight: 500;
}

.hero-description {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    line-height: 1.6;
}

.highlight {
    color: #a8e6ff;
    font-weight: 700;
    text-shadow: 0 0 10px rgba(168, 230, 255, 0.5);
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Enhanced Wind and Light Effects in Hero Section */
.hero-image {
    position: relative;
    overflow: visible;
}

/* 基本エフェクトコンテナ */
.wind-light-effect {
    position: absolute;
    pointer-events: none;
    z-index: 4;
}

/* エフェクト1: 右側メイン（既存の位置・大きいサイズ） */
.wind-light-effect.effect-main {
    bottom: 15%;
    right: 10%;
    width: 300px; /* サイズを大きく */
    height: 400px; /* サイズを大きく */
}

/* エフェクト2: 左側 */
.wind-light-effect.effect-left {
    bottom: 25%;
    left: 8%;
    width: 200px;
    height: 280px;
}

/* エフェクト3: 中央下部 */
.wind-light-effect.effect-center {
    bottom: 10%;
    left: 50%;
    transform: translateX(-50%);
    width: 180px;
    height: 250px;
}

/* エフェクト4: 右上 */
.wind-light-effect.effect-top-right {
    top: 20%;
    right: 15%;
    width: 150px;
    height: 200px;
}

/* 光粒子のベーススタイル */
.light-particle {
    position: absolute;
    bottom: 0;
    border-radius: 50%;
    background: radial-gradient(ellipse at center, #a8e6ff, transparent 70%);
    opacity: 0.9;
    animation: riseLight 4s infinite ease-in-out;
    filter: drop-shadow(0 0 12px #a8e6ff); /* シャドウを大きく */
}

/* メインエフェクトの光粒子（大きいサイズ） */
.effect-main .light-particle {
    width: 8px; /* サイズアップ */
    height: 25px; /* サイズアップ */
}

.effect-main .light-particle:nth-child(1) {
    left: 40%;
    animation-delay: 0s;
    width: 10px;
    height: 30px;
}
.effect-main .light-particle:nth-child(2) {
    left: 50%;
    animation-delay: 0.6s;
    width: 8px;
    height: 28px;
}
.effect-main .light-particle:nth-child(3) {
    left: 60%;
    animation-delay: 1.2s;
    width: 9px;
    height: 26px;
}
.effect-main .light-particle:nth-child(4) {
    left: 35%;
    animation-delay: 1.8s;
    width: 7px;
    height: 24px;
}
.effect-main .light-particle:nth-child(5) {
    left: 65%;
    animation-delay: 2.4s;
    width: 10px;
    height: 32px;
}
.effect-main .light-particle:nth-child(6) {
    left: 45%;
    animation-delay: 3s;
    width: 8px;
    height: 27px;
}
.effect-main .light-particle:nth-child(7) {
    left: 55%;
    animation-delay: 3.6s;
    width: 9px;
    height: 29px;
}

/* 左側エフェクトの光粒子 */
.effect-left .light-particle {
    width: 6px;
    height: 20px;
}

.effect-left .light-particle:nth-child(1) {
    left: 30%;
    animation-delay: 0.4s;
}
.effect-left .light-particle:nth-child(2) {
    left: 50%;
    animation-delay: 1.2s;
}
.effect-left .light-particle:nth-child(3) {
    left: 70%;
    animation-delay: 2s;
}
.effect-left .light-particle:nth-child(4) {
    left: 40%;
    animation-delay: 2.8s;
}

/* 中央エフェクトの光粒子 */
.effect-center .light-particle {
    width: 5px;
    height: 18px;
}

.effect-center .light-particle:nth-child(1) {
    left: 40%;
    animation-delay: 0.8s;
}
.effect-center .light-particle:nth-child(2) {
    left: 60%;
    animation-delay: 1.6s;
}
.effect-center .light-particle:nth-child(3) {
    left: 50%;
    animation-delay: 2.4s;
}

/* 右上エフェクトの光粒子 */
.effect-top-right .light-particle {
    width: 4px;
    height: 15px;
}

.effect-top-right .light-particle:nth-child(1) {
    left: 40%;
    animation-delay: 1s;
}
.effect-top-right .light-particle:nth-child(2) {
    left: 60%;
    animation-delay: 2s;
}

/* 光が上昇するアニメーション（拡張版） */
@keyframes riseLight {
    0% {
        transform: translateY(0) scale(1);
        opacity: 0.9;
    }
    25% {
        opacity: 1;
        transform: scale(1.1);
    }
    100% {
        transform: translateY(-200px) scale(1.3); /* 上昇距離とスケールを拡大 */
        opacity: 0;
    }
}

/* 風線のベーススタイル */
.wind-line {
    position: absolute;
    bottom: 0;
    border-radius: 25px; /* 角を丸く */
    background: linear-gradient(to right, rgba(168, 230, 255, 0.8), rgba(168, 230, 255, 0));
    filter: drop-shadow(0 0 8px #a8e6ff); /* シャドウを強化 */
    opacity: 0.8;
    animation: flowWind 6s infinite ease-in-out;
}

/* メインエフェクトの風線（大きいサイズ） */
.effect-main .wind-line {
    height: 5px; /* サイズアップ */
}

.effect-main .wind-line:nth-child(8) {
    left: 25%;
    animation-delay: 0s;
    width: 120px; /* 長さを拡大 */
    height: 5px;
}
.effect-main .wind-line:nth-child(9) {
    left: 45%;
    animation-delay: 1.5s;
    width: 100px;
    height: 4px;
}
.effect-main .wind-line:nth-child(10) {
    left: 65%;
    animation-delay: 3s;
    width: 110px;
    height: 5px;
}
.effect-main .wind-line:nth-child(11) {
    left: 35%;
    animation-delay: 4.5s;
    width: 90px;
    height: 4px;
}

/* 左側エフェクトの風線 */
.effect-left .wind-line {
    height: 3px;
}

.effect-left .wind-line:nth-child(5) {
    left: 30%;
    animation-delay: 1s;
    width: 80px;
}
.effect-left .wind-line:nth-child(6) {
    left: 60%;
    animation-delay: 3s;
    width: 70px;
}

/* 中央エフェクトの風線 */
.effect-center .wind-line {
    height: 3px;
}

.effect-center .wind-line:nth-child(4) {
    left: 35%;
    animation-delay: 2s;
    width: 75px;
}
.effect-center .wind-line:nth-child(5) {
    left: 55%;
    animation-delay: 4s;
    width: 65px;
}

/* 右上エフェクトの風線 */
.effect-top-right .wind-line {
    height: 2px;
}

.effect-top-right .wind-line:nth-child(3) {
    left: 40%;
    animation-delay: 3s;
    width: 60px;
}

/* 風が流れるアニメーション（拡張版） */
@keyframes flowWind {
    0%, 100% {
        transform: translateY(0) translateX(0) scaleX(1);
        opacity: 0.8;
    }
    50% {
        transform: translateY(-40px) translateX(30px) scaleX(1.2); /* 移動距離とスケールを拡大 */
        opacity: 1;
    }
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .wind-light-effect.effect-main {
        width: 200px;
        height: 250px;
        bottom: 12%;
        right: 8%;
    }
    
    .wind-light-effect.effect-left {
        width: 150px;
        height: 180px;
        bottom: 20%;
        left: 5%;
    }
    
    .wind-light-effect.effect-center {
        width: 120px;
        height: 150px;
        bottom: 8%;
    }
    
    .wind-light-effect.effect-top-right {
        display: none; /* モバイルでは非表示 */
    }
    
    .light-particle {
        width: 80% !important;
        height: 80% !important;
    }
    
    .wind-line {
        width: 70% !important;
        height: 80% !important;
    }
    
    @keyframes riseLight {
        100% {
            transform: translateY(-120px) scale(1.2);
            opacity: 0;
        }
    }
}

@media (max-width: 480px) {
    .wind-light-effect.effect-left {
        display: none; /* 小さな画面では左側エフェクトも非表示 */
    }
    
    .wind-light-effect.effect-center {
        width: 100px;
        height: 120px;
    }
}

/* アニメーション無効化設定への対応 */
@media (prefers-reduced-motion: reduce) {
    .light-particle,
    .wind-line {
        animation: none;
        opacity: 0.5;
    }
}

/* Problems Section */
.problems {
    padding: 80px 0;
    background: #f8f9fa;
}

.problems-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.problem-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.problem-card:hover {
    transform: translateY(-5px);
}

.problem-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.problem-card h3 {
    color: #e74c3c;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

/* Features Section - 画像対応版 */
.features {
    padding: 80px 0;
    background: white;
}

.product-section {
    margin-bottom: 4rem;
}

.product-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.product-section.reverse .product-content {
    direction: rtl;
}

.product-section.reverse .product-info {
    direction: ltr;
}

.product-title {
    font-size: 2rem;
    color: #2c3e50;
    margin-bottom: 2rem;
}

.feature-item {
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 10px;
}

.feature-item h4 {
    color: #3498db;
    margin-bottom: 0.5rem;
}

.specs-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 2rem;
}

.spec-item {
    display: flex;
    justify-content: space-between;
    padding: 0.8rem;
    background: #ecf0f1;
    border-radius: 8px;
}

.spec-label {
    font-weight: 600;
    color: #2c3e50;
}

.spec-value {
    font-weight: 700;
    color: #3498db;
}

/* 製品画像コンテナ */
.product-visual-large {
    height: 400px;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    position: relative;
    background: linear-gradient(135deg, #f8f9fa, #ecf0f1);
}

/* 製品画像 */
.product-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: transform 0.3s ease;
}

.product-image:hover {
    transform: scale(1.05);
}

/* 画像読み込み失敗時のフォールバック */
.product-image {
    background: linear-gradient(135deg, #3498db, #2980b9);
}

.product-image::before {
    content: attr(alt);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 1.5rem;
    font-weight: bold;
    text-align: center;
    width: 100%;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.product-image:not([src]),
.product-image[src=""] {
    background: linear-gradient(135deg, #3498db, #2980b9);
}

.product-image:not([src])::before,
.product-image[src=""]::before {
    opacity: 1;
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .product-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .product-section.reverse .product-content {
        direction: ltr;
    }
    
    .product-visual-large {
        height: 300px;
    }
    
    .product-title {
        font-size: 1.8rem;
    }
}

@media (max-width: 480px) {
    .product-visual-large {
        height: 250px;
    }
    
    .product-title {
        font-size: 1.5rem;
    }
    
    .specs-grid {
        grid-template-columns: 1fr;
    }
}

/* 画像の遅延読み込み対応 */
.product-image[data-src] {
    opacity: 0;
    transition: opacity 0.3s ease;
}

.product-image[data-src].loaded {
    opacity: 1;
}

/* 高コントラストモード対応 */
@media (prefers-contrast: high) {
    .product-visual-large {
        border: 2px solid #000;
    }
    
    .product-image {
        filter: contrast(1.2);
    }
}


/* Usage Scenarios Section - 画像対応版 */
.usage-scenarios {
    padding: 80px 0;
    background: #f8f9fa;
}

.usage-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.usage-item {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.usage-item:hover {
    transform: translateY(-5px);
}

/* 使用イメージ画像コンテナ */
.usage-image {
    height: 200px;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #f8f9fa, #ecf0f1);
}

/* 使用イメージ画像 */
.usage-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: transform 0.3s ease, filter 0.3s ease;
}

.usage-item:hover .usage-img {
    transform: scale(1.1);
    filter: brightness(1.1);
}

/* 画像読み込み失敗時のフォールバック */
.usage-img {
    background: linear-gradient(135deg, #3498db, #2980b9);
}

.usage-img::before {
    content: attr(alt);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 1rem;
    font-weight: bold;
    text-align: center;
    width: 100%;
    opacity: 0;
    transition: opacity 0.3s ease;
    padding: 1rem;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 10px;
    backdrop-filter: blur(5px);
}

.usage-img:not([src]),
.usage-img[src=""] {
    background: linear-gradient(135deg, #3498db, #2980b9);
}

.usage-img:not([src])::before,
.usage-img[src=""]::before {
    opacity: 1;
}

/* 画像オーバーレイエフェクト */
.usage-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        to bottom,
        transparent 0%,
        transparent 60%,
        rgba(52, 152, 219, 0.1) 100%
    );
    opacity: 0;
    transition: opacity 0.3s ease;
}

.usage-item:hover .usage-image::after {
    opacity: 1;
}

.usage-content {
    padding: 1.5rem;
}

.usage-content h3 {
    color: #2c3e50;
    font-size: 1.3rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.usage-content h3:before {
    content: "🔧";
    font-size: 1rem;
}

.usage-item:nth-child(1) .usage-content h3:before {
    content: "🪜";
}

.usage-item:nth-child(2) .usage-content h3:before {
    content: "🔧";
}

.usage-item:nth-child(3) .usage-content h3:before {
    content: "📦";
}

.usage-item:nth-child(4) .usage-content h3:before {
    content: "🚛";
}

.usage-content p {
    color: #555;
    line-height: 1.6;
    font-size: 0.95rem;
}

/* 遅延読み込み対応 */
.usage-img[data-src] {
    opacity: 0;
    transition: opacity 0.3s ease;
}

.usage-img[data-src].loaded {
    opacity: 1;
}

/* レスポンシブ対応 */
@media (max-width: 1200px) {
    .usage-grid {
        grid-template-columns: repeat(2, 1fr);
        max-width: 1000px;
    }
    
    .usage-image {
        height: 220px;
    }
    
    .usage-content {
        padding: 2rem;
    }
    
    .usage-content h3 {
        font-size: 1.4rem;
    }
    
    .usage-content p {
        font-size: 1rem;
    }
}

@media (max-width: 768px) {
    .usage-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .usage-image {
        height: 200px;
    }
    
    .usage-content {
        padding: 1.5rem;
    }
    
    .usage-content h3 {
        font-size: 1.3rem;
    }
    
    .usage-content p {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .usage-image {
        height: 180px;
    }
    
    .usage-content {
        padding: 1rem;
    }
    
    .usage-content h3 {
        font-size: 1.2rem;
    }
    
    .usage-content p {
        font-size: 0.9rem;
    }
}

/* 高コントラストモード対応 */
@media (prefers-contrast: high) {
    .usage-img {
        filter: contrast(1.2);
    }
    
    .usage-item {
        border: 2px solid #000;
    }
}

/* アニメーション無効化設定への対応 */
@media (prefers-reduced-motion: reduce) {
    .usage-img,
    .usage-item {
        transition: none;
    }
    
    .usage-item:hover .usage-img {
        transform: none;
        filter: none;
    }
}



/* FAQ Section */
.faq {
    padding: 80px 0;
    background: white;
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 1rem;
    border: 1px solid #ecf0f1;
    border-radius: 10px;
    overflow: hidden;
}

.faq-question {
    width: 100%;
    padding: 1.5rem;
    background: #f8f9fa;
    border: none;
    text-align: left;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: 600;
    color: #2c3e50;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.3s ease;
}

.faq-question:hover {
    background: #ecf0f1;
}

.faq-toggle {
    font-size: 1.5rem;
    font-weight: bold;
    transition: transform 0.3s ease;
}

.faq-answer {
    padding: 0 1.5rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-answer.active {
    padding: 1.5rem;
    max-height: 500px;
}

.faq-answer ol, .faq-answer ul {
    margin-left: 1.5rem;
}

.faq-answer li {
    margin-bottom: 0.5rem;
}

/* Contact Section - 視認性改善版 */
.contact {
    padding: 80px 0;
    background: linear-gradient(135deg, #2c3e50, #34495e);
    color: white;
    position: relative;
}

/* コントラスト強化のためのオーバーレイ追加 */
.contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(44, 62, 80, 0.1);
    z-index: 1;
}

.contact .container {
    position: relative;
    z-index: 2;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

/* テキストの視認性を大幅に改善 */
.contact-info h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: #ffffff; /* 純白に変更 */
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7); /* シャドウ強化 */
    font-weight: 700; /* フォントウェイト強化 */
}

.contact-info p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    color: #f8f9fa; /* より明るい色に変更 */
    opacity: 1; /* 不透明度を100%に */
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
    line-height: 1.7;
}

.contact-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.company-info h4 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #5dade2; /* より明るいブルーに変更 */
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.6);
    font-weight: 600;
}

.company-list {
    margin-bottom: 2rem;
}

.company-list p {
    margin-bottom: 0.5rem;
    color: #ffffff; /* 純白に変更 */
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
    font-weight: 500;
}

.contact-details p {
    margin-bottom: 0.8rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #f1f2f6; /* より明るい色に変更 */
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
    font-weight: 500;
}

/* セクションタイトルも改善 */
.contact .section-title {
    color: #ffffff;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8);
    font-weight: 700;
    margin-bottom: 3rem;
}

/* 高コントラストモード対応 */
@media (prefers-contrast: high) {
    .contact {
        background: #000000;
    }
    
    .contact-info h3,
    .contact-info p,
    .company-list p,
    .contact-details p,
    .contact .section-title {
        color: #ffffff;
        text-shadow: none;
        font-weight: 700;
    }
    
    .company-info h4 {
        color: #00bfff;
    }
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .contact-info h3 {
        font-size: 1.8rem;
        text-align: center;
    }
    
    .contact-info p {
        text-align: center;
        font-size: 1rem;
    }
    
    .company-info h4 {
        font-size: 1.3rem;
        text-align: center;
    }
    
    .contact-buttons {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .contact-info h3 {
        font-size: 1.5rem;
    }
    
    .contact-info p {
        font-size: 0.95rem;
    }
    
    .company-info h4 {
        font-size: 1.2rem;
    }
    
    .contact-details p {
        font-size: 0.9rem;
    }
}

/* 見積依頼ボタンの強化スタイル */
.btn-secondary[href*="contact"]:before {
    content: "📝 ";
    margin-right: 0.5rem;
}

.btn-secondary[href*="contact"]:hover {
    background: #2980b9;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(41, 128, 185, 0.4);
}

/* 外部リンクアイコンの追加 */
.btn-secondary[href^="http"]:after {
    content: " 🔗";
    font-size: 0.8rem;
    opacity: 0.7;
    margin-left: 0.3rem;
}

/* 見積依頼ボタンの特別スタイル */
#quote-request-btn {
    background: linear-gradient(135deg, #27ae60, #2ecc71);
    color: white;
    border: none;
}

#quote-request-btn:hover {
    background: linear-gradient(135deg, #229954, #27ae60);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(39, 174, 96, 0.4);
}

/* Footer */
.footer {
    background: #2c3e50;
    color: white;
    padding: 2rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-logo h3 {
    color: #3498db;
    margin-bottom: 0.5rem;
}

.footer-links ul {
    list-style: none;
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: white;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #3498db;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #34495e;
    opacity: 0.7;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

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

    .hero-title {
        font-size: 2.5rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .product-content {
        grid-template-columns: 1fr;
    }

    .product-section.reverse .product-content {
        direction: ltr;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

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

    .footer-links ul {
        justify-content: center;
    }

    .hero-buttons {
        justify-content: center;
    }

    .contact-buttons {
        justify-content: center;
    }

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

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .btn {
        padding: 10px 20px;
    }

    .btn-large {
        padding: 12px 25px;
        font-size: 1rem;
    }

    .problems-grid,
    .benefits-grid {
        grid-template-columns: 1fr;
    }

    .footer-links ul {
        flex-direction: column;
        gap: 1rem;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-on-scroll {
    animation: fadeInUp 0.6s ease forwards;
}

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

/* Focus styles for accessibility */
button:focus,
a:focus {
    outline: 2px solid #3498db;
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .btn-primary {
        background: #000;
        border: 2px solid #fff;
    }
    
    .btn-secondary {
        background: #fff;
        color: #000;
        border: 2px solid #000;
    }
}