/* ===================================
   Shift Gift - Corporate Website Stylesheet
   =================================== */

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

:root {
    /* カラーパレット - 清潔感のあるライトテーマ */
    --primary: #0EA5E9;
    --primary-dark: #0369A1;
    --accent: #06B6D4;
    --surface: #FFFFFF;
    --text-dark: #0F172A;
    --text-light: #475569;
    --bg-white: #FFFFFF;
    --bg-alt: #F8FAFC;
    --bg-deep: #F1F5F9;
    --bg-sub: #E2E8F0;
    --border: rgba(0, 0, 0, 0.08);
    --glass: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.5);

    /* フォント - よりモダンな組み合わせ */
    --font-ja: 'Outfit', 'Noto Sans JP', sans-serif;
    --font-serif: 'DM Serif Display', serif;
    --font-en: 'Outfit', sans-serif;

    /* スペーシング */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* トランジション */
    --transition: cubic-bezier(0.4, 0, 0.2, 1) 0.4s;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-ja);
    color: var(--text-dark);
    line-height: 1.7;
    font-size: 16px;
    background: var(--bg-white);
    overflow-x: hidden;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: var(--spacing-sm);
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* コンテナ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

.section-alt {
    background: var(--bg-alt);
}

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

.section-no-top {
    padding-top: 0;
}

.section-no-bottom {
    padding-bottom: 0;
}

.section-title {
    font-family: var(--font-en);
    font-size: 2.5rem;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1rem;
    color: var(--text-light);
    font-weight: 400;
}

/* ===================================
   ヘッダー & ナビゲーション
   =================================== */

.header {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
}

.logo-text {
    font-family: var(--font-en);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary);
}

.logo-image {
    height: 40px;
    width: auto;
    display: block;
    transition: var(--transition);
}

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

.logo a {
    display: block;
    line-height: 0;
}

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

.nav-menu a {
    color: var(--text-dark);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 6px;
    transition: var(--transition);
}

.nav-menu a:hover {
    color: var(--accent);
    background: var(--glass);
    transform: translateY(-2px);
}

.nav-menu a.active {
    color: var(--primary);
    background: var(--bg-alt);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: var(--transition);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

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

.hero {
    background: linear-gradient(135deg, var(--bg-sub) 0%, var(--bg-white) 100%);
    padding: var(--spacing-xl) 0;
    position: relative;
    overflow: hidden;
    min-height: 90vh;
    display: flex;
    align-items: center;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero-title .accent {
    color: var(--primary);
    display: block;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-md);
}

.hero-launch {
    font-size: 1rem;
    color: var(--text-light);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--bg-white);
    border-radius: 50px;
    display: inline-block;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.hero-image-overlay {
    position: absolute;
    top: 0;
    right: 0;
    width: 60%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
    mask-image: linear-gradient(to right, transparent, black 40%);
    -webkit-mask-image: linear-gradient(to left, black 60%, transparent);
}

.hero-bg-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.6;
    animation: slow-zoom 20s infinite alternate ease-in-out;
}

@keyframes slow-zoom {
    from {
        transform: scale(1);
    }

    to {
        transform: scale(1.1);
    }
}

/* ===================================
   ボタン
   =================================== */

.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    font-family: var(--font-ja);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--bg-white);
    box-shadow: 0 4px 15px rgba(14, 165, 233, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(14, 165, 233, 0.4);
}

.btn-secondary {
    background: var(--bg-white);
    color: var(--text-dark);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--glass-border);
    color: var(--primary);
}

.btn-block {
    width: 100%;
}

/* ===================================
   Aboutセクション
   =================================== */

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

.about-text h3 {
    font-size: 2rem;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
}

.about-text p {
    color: var(--text-light);
    margin-bottom: var(--spacing-sm);
    font-size: 1.1rem;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.stat {
    text-align: center;
    padding: var(--spacing-md);
    background: var(--bg-alt);
    border: 1px solid var(--border);
    border-radius: 12px;
}

.stat-number {
    display: block;
    font-family: var(--font-en);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    display: block;
    font-size: 0.9rem;
    color: var(--text-light);
}

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

.image-placeholder {
    width: 100%;
    max-width: 400px;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
    border: 1px solid var(--glass-border);
}

/* ===================================
   戦略セクション (3-Pillars)
   =================================== */

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

.strategy-card {
    background: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: 20px;
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.strategy-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary);
    box-shadow: 0 15px 40px rgba(14, 165, 233, 0.2);
}

.strategy-number {
    font-family: 'Outfit', sans-serif;
    font-size: 4rem;
    font-weight: 700;
    color: var(--primary);
    opacity: 0.1;
    position: absolute;
    top: -10px;
    right: 18px;
    line-height: 1;
}

.strategy-card h3 {
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
    font-size: 1.5rem;
    position: relative;
    z-index: 2;
}

.strategy-card p {
    color: var(--text-light);
    font-size: 1rem;
    line-height: 1.8;
    position: relative;
    z-index: 2;
}

/* ===================================
   Servicesセクション
   =================================== */

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.service-card {
    background: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: 20px;
    border: 1px solid var(--border);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    text-align: center;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
    border-color: var(--accent);
}

.service-icon {
    margin-bottom: var(--spacing-md);
    display: inline-block;
}

.service-card h3 {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
}

.service-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* ===================================
   Visionセクション
   =================================== */

.vision-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-lg);
    align-items: start;
}

.vision-text h3 {
    font-size: 2rem;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
}

.vision-text p {
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
    font-size: 1.1rem;
}

.vision-list {
    list-style: none;
    margin-top: var(--spacing-md);
}

.vision-list li {
    color: var(--text-light);
    margin-bottom: var(--spacing-sm);
    padding-left: var(--spacing-md);
    position: relative;
    font-size: 1.1rem;
}

.vision-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: 700;
}

.vision-quote {
    background: var(--bg-alt);
    padding: var(--spacing-lg);
    border-radius: 12px;
    border-left: 4px solid var(--primary);
}

.vision-quote blockquote {
    font-style: italic;
    color: var(--text-dark);
    font-size: 1.1rem;
    line-height: 1.8;
}

.vision-quote cite {
    display: block;
    margin-top: var(--spacing-md);
    color: var(--text-light);
    font-style: normal;
    font-size: 0.9rem;
}

/* ===================================
   Contactセクション
   =================================== */

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-lg);
}

.contact-info h3 {
    font-size: 2rem;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
}

.contact-info p {
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.contact-details {
    background: var(--bg-white);
    padding: var(--spacing-md);
    border-radius: 12px;
    border: 1px solid var(--border);
}

.contact-item {
    display: flex;
    flex-direction: column;
    margin-bottom: var(--spacing-md);
}

.contact-item:last-child {
    margin-bottom: 0;
}

.contact-label {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-xs);
}

.contact-value {
    font-weight: 600;
    color: var(--primary);
}

/* フォーム */
.contact-form {
    background: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: 12px;
    border: 1px solid var(--border);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--text-dark);
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-family: var(--font-ja);
    font-size: 1rem;
    transition: var(--transition);
    background: var(--bg-white);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(8, 145, 178, 0.1);
}

.form-group textarea {
    resize: vertical;
}

/* ===================================
   Productsセクション
   =================================== */

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

/* ===================================
   Large Product Showcase
   =================================== */

.product-feature {
    padding: var(--spacing-xl) 0;
    overflow: hidden;
}

.product-feature-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.product-feature:nth-child(even) .product-feature-grid {
    grid-template-columns: 1fr 1.2fr;
}

.product-feature:nth-child(even) .feature-image-wrapper {
    order: 2;
}

.product-feature:nth-child(even) .feature-content {
    order: 1;
}

.feature-image-wrapper {
    position: relative;
    border-radius: 32px;
    overflow: hidden;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.12);
    transition: var(--transition);
}

.feature-image-wrapper:hover {
    transform: translateY(-10px) scale(1.02);
}

.feature-image-wrapper img {
    width: 100%;
    height: 600px;
    object-fit: cover;
    display: block;
}

.feature-content {
    padding: var(--spacing-md);
}

.feature-tag {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    background: var(--bg-alt);
    color: var(--primary);
    border-radius: 100px;
    font-weight: 700;
    font-size: 0.875rem;
    margin-bottom: 2rem;
    border: 1px solid var(--border);
}

.feature-title {
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 2rem;
    color: var(--text-dark);
}

.feature-description {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 2.5rem;
    line-height: 1.8;
}

.feature-checklist {
    list-style: none;
    margin-bottom: 3rem;
}

.feature-checklist li {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.125rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
    font-weight: 500;
}

.feature-checklist li i {
    color: var(--primary);
    font-size: 1.25rem;
}

.feature-cta-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

@media (max-width: 1024px) {

    .product-feature-grid,
    .product-feature:nth-child(even) .product-feature-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .product-feature:nth-child(even) .feature-image-wrapper,
    .product-feature:nth-child(even) .feature-content {
        order: 0;
    }

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

    .feature-image-wrapper img {
        height: 400px;
    }
}

.product-item {
    background: var(--bg-white);
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.product-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    border-color: var(--accent);
}

.product-image {
    width: 100%;
    height: 250px;
    overflow: hidden;
    background: var(--bg-deep);
    position: relative;
}

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

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

.product-placeholder svg {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

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

.product-info h3 {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
}

.product-info p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.product-tags {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.tag {
    display: inline-block;
    padding: 6px 14px;
    background: rgba(14, 165, 233, 0.1);
    color: var(--primary);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    border: 1px solid var(--primary);
}

.products-note {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--bg-sub);
    border-radius: 12px;
    border-left: 4px solid var(--primary);
    text-align: center;
}

.products-note p {
    color: var(--text-light);
    margin: 0;
}

.products-note code {
    background: var(--bg-white);
    padding: 4px 8px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    color: var(--primary);
    font-weight: 600;
}

/* ===================================
   Roadmapセクション
   =================================== */

.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding: var(--spacing-md) 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 30px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(to bottom, var(--primary), var(--accent));
}

.timeline-item {
    position: relative;
    padding-left: 80px;
    margin-bottom: var(--spacing-lg);
}

.timeline-marker {
    position: absolute;
    left: 0;
    top: 0;
    width: 60px;
    height: 60px;
    background: var(--bg-white);
    border: 3px solid var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
}

.timeline-icon {
    font-size: 1.8rem;
}

.timeline-content {
    background: var(--glass);
    padding: var(--spacing-lg);
    border-radius: 16px;
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.timeline-content:hover {
    transform: translateX(10px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.btn:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.btn:active {
    transform: translateY(-1px) scale(0.98);
}

.timeline-title {
    color: var(--primary);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.timeline-content h4 {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
}

.timeline-list {
    list-style: none;
    padding-left: 0;
}

.timeline-list li {
    color: var(--text-light);
    margin-bottom: var(--spacing-xs);
    padding-left: var(--spacing-md);
    position: relative;
}

.timeline-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: 700;
}

.timeline-item-highlight .timeline-marker {
    border-color: var(--accent);
    background: var(--bg-sub);
    box-shadow: 0 0 20px rgba(6, 182, 212, 0.3);
}

.timeline-item-highlight .timeline-content {
    border-color: var(--accent);
    background: linear-gradient(135deg, var(--bg-white) 0%, var(--bg-sub) 100%);
}

/* ===================================
   FAQセクション
   =================================== */

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

.faq-item {
    background: var(--glass);
    padding: 0;
    border-radius: 12px;
    border: 1px solid var(--glass-border);
    transition: var(--transition);
    overflow: hidden;
}

.faq-item:hover {
    border-color: var(--accent);
    background: rgba(255, 255, 255, 0.05);
}

/* オーディオプレイヤーのアニメーション用 */
.audio-player.playing .play-pause-btn {
    color: var(--accent);
    box-shadow: 0 0 15px rgba(34, 211, 238, 0.3);
}

.progress-fill {
    transition: width 0.1s linear;
}

.audio-progress-container {
    cursor: pointer;
}

.audio-progress-container:hover .audio-progress-bar {
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
}

.faq-question {
    padding: var(--spacing-md);
    color: var(--text-dark);
    font-size: 1.1rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0;
}

.faq-toggle {
    display: block;
    width: 20px;
    height: 20px;
    position: relative;
    transition: var(--transition);
}

.faq-toggle::before,
.faq-toggle::after {
    content: '';
    position: absolute;
    background: var(--primary);
    top: 50%;
    left: 0;
    width: 100%;
    height: 2px;
    transform: translateY(-50%);
}

.faq-toggle::after {
    transform: translateY(-50%) rotate(90deg);
    transition: var(--transition);
}

.faq-item.active .faq-toggle::after {
    transform: translateY(-50%) rotate(0deg);
}

.faq-answer-wrap {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.2, 0, 0.2, 1);
    background: rgba(0, 0, 0, 0.2);
}

.faq-item.active .faq-answer-wrap {
    max-height: 200px;
}

.faq-answer {
    padding: var(--spacing-md);
    color: var(--text-light);
    line-height: 1.8;
}

.faq-link {
    color: var(--primary);
    font-weight: 600;
    text-decoration: underline;
}

.faq-link:hover {
    color: var(--accent);
}

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

.footer {
    background: var(--bg-deep);
    color: var(--text-light);
    padding: var(--spacing-xl) 0 0;
    border-top: 1px solid var(--glass-border);
}

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

.footer-brand .logo-text {
    color: var(--bg-white);
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    display: block;
}

.footer-logo {
    height: 50px;
    width: auto;
    margin-bottom: var(--spacing-sm);
    opacity: 1;
}

.footer-brand p {
    color: var(--text-light);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

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

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

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

.footer-column a {
    color: var(--text-light);
    transition: var(--transition);
}

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

.footer-bottom {
    text-align: center;
    padding: var(--spacing-md) 0 var(--spacing-sm);
    border-top: 1px solid var(--glass-border);
}

.footer-bottom-logo {
    height: 60px;
    width: auto;
    margin: 0 auto var(--spacing-sm);
    display: block;
    opacity: 0.9;
}

.footer-bottom p {
    color: var(--text-light);
    font-size: 0.9rem;
    margin: 0;
    padding-bottom: var(--spacing-sm);
}

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

@media (max-width: 1024px) {
    .hero-title {
        font-size: 3rem;
    }

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

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

    .about-stats {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .logo-image {
        height: 60px;
    }

    .nav-menu {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--bg-white);
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--border);
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        z-index: 1000;
        gap: var(--spacing-sm);
    }

    .nav-menu.active {
        display: flex;
        animation: slideDown 0.3s ease-out forwards;
    }

    .nav-menu a {
        padding: var(--spacing-sm);
        width: 100%;
        border-radius: 8px;
    }

    .nav-menu a:hover {
        background: var(--bg-deep);
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .hero {
        min-height: 70vh;
        padding: var(--spacing-lg) 0;
    }

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

    .hero-description {
        font-size: 1.1rem;
    }

    .hero-visual {
        opacity: 0.5;
    }

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

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

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

    .timeline::before {
        left: 15px;
    }

    .timeline-item {
        padding-left: 60px;
    }

    .timeline-marker {
        width: 50px;
        height: 50px;
    }

    .timeline-icon {
        font-size: 1.5rem;
    }

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

    .footer-logo {
        height: 70px;
    }

    .footer-bottom-logo {
        height: 80px;
    }

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

    .footer-links {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }

    .logo-image {
        height: 50px;
    }

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

    .hero-cta {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .footer-logo {
        height: 60px;
    }

    .footer-bottom-logo {
        height: 70px;
    }
}

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

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content,
.about-content,
.service-card,
.product-item,
.vision-content,
.timeline-item,
.contact-content {
    opacity: 0;
    transition: opacity 1s cubic-bezier(0.2, 0.8, 0.2, 1), transform 1s cubic-bezier(0.2, 0.8, 0.2, 1);
}

/* ライトボックス */
.lightbox-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.lightbox-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.lightbox-content {
    position: relative;
    max-width: 90%;
    max-height: 90%;
    text-align: center;
}

.lightbox-content img {
    max-width: 100%;
    max-height: 80vh;
    border-radius: 8px;
    box-shadow: 0 0 40px rgba(0, 0, 0, 0.5);
}

.lightbox-caption {
    color: white;
    margin-top: 1rem;
    font-size: 1.1rem;
}

.lightbox-close {
    position: absolute;
    top: -40px;
    right: 0;
    background: none;
    border: none;
    color: white;
    font-size: 2.5rem;
    cursor: pointer;
}

/* スクロール追従グラデーション */
.mouse-follower {
    position: fixed;
    top: 0;
    left: 0;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(14, 165, 233, 0.05) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
    transform: translate(-50%, -50%);
    transition: transform 0.1s ease;
}