/* ===================================
   基本設定
   =================================== */
:root {
    --color-primary: #2c3e50;
    --color-secondary: #34495e;
    --color-accent: #95a5a6;
    --color-white: #ffffff;
    --color-light-gray: #f8f9fa;
    --color-medium-gray: #ecf0f1;
    --color-dark-gray: #7f8c8d;
    --color-text: #2c3e50;
    --color-text-light: #7f8c8d;
    --font-primary: 'Noto Sans JP', sans-serif;
    --font-serif: 'Noto Serif JP', serif;
    --transition-speed: 0.3s;
    --box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
    --box-shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
}

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

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

body {
    font-family: var(--font-primary);
    color: var(--color-text);
    line-height: 1.8;
    background-color: var(--color-white);
    overflow-x: hidden;
}

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

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

/* ===================================
   コンテナ
   =================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.container-fluid {
    width: 100%;
    padding: 0 20px;
}

/* ===================================
   ヘッダー
   =================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    z-index: 1000;
    transition: all var(--transition-speed) ease;
}

.header.scrolled {
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo img {
    height: 50px;
    width: auto;
    transition: transform var(--transition-speed) ease;
}

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

.nav-list {
    display: flex;
    list-style: none;
    gap: 40px;
    align-items: center;
}

.nav-link {
    color: var(--color-text);
    font-weight: 500;
    font-size: 0.95rem;
    letter-spacing: 0.5px;
    position: relative;
    padding: 8px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width var(--transition-speed) ease;
}

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

.nav-link-cta {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: 10px 24px;
    border-radius: 30px;
}

.nav-link-cta::after {
    display: none;
}

.nav-link-cta:hover {
    background-color: var(--color-secondary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(44, 62, 80, 0.3);
}

.hamburger {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: 1001;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--color-primary);
    margin: 3px 0;
    transition: all var(--transition-speed) ease;
    border-radius: 3px;
}

/* ===================================
   ヒーローセクション
   =================================== */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('https://www.genspark.ai/api/hub_files/download/white-birch-hub/IMG_20251028_122003.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    z-index: 1;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.7) 0%, rgba(236, 240, 241, 0.6) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 900px;
    padding: 0 20px;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: 3.5rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 30px;
    line-height: 1.3;
    letter-spacing: 2px;
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--color-text-light);
    margin-bottom: 50px;
    font-weight: 300;
    letter-spacing: 1px;
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: var(--color-text-light);
    font-size: 0.75rem;
    letter-spacing: 2px;
    z-index: 2;
}

.scroll-line {
    width: 2px;
    height: 50px;
    background: linear-gradient(to bottom, var(--color-accent) 0%, transparent 100%);
    animation: scrollAnimation 2s ease-in-out infinite;
}

@keyframes scrollAnimation {
    0%, 100% {
        transform: translateY(0);
        opacity: 1;
    }
    50% {
        transform: translateY(15px);
        opacity: 0.5;
    }
}

/* ===================================
   ボタン
   =================================== */
.btn {
    display: inline-block;
    padding: 16px 48px;
    border-radius: 50px;
    font-weight: 500;
    font-size: 1rem;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
    border: 2px solid transparent;
    letter-spacing: 1px;
}

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

.btn-primary:hover {
    background-color: var(--color-secondary);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(44, 62, 80, 0.3);
}

.btn-primary-inverted {
    background-color: var(--color-white);
    color: var(--color-primary);
    border: 2px solid var(--color-white);
}

.btn-primary-inverted:hover {
    background-color: transparent;
    color: var(--color-white);
    transform: translateY(-3px);
}

/* ===================================
   セクション共通
   =================================== */
section {
    padding: 100px 0;
}

.section-title {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--color-primary);
    text-align: center;
    margin-bottom: 20px;
    letter-spacing: 2px;
}

.section-subtitle {
    text-align: center;
    color: var(--color-text-light);
    font-size: 1.1rem;
    margin-bottom: 60px;
}

/* ===================================
   特徴セクション
   =================================== */
.features {
    background-color: var(--color-white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.feature-card {
    text-align: center;
    padding: 50px 30px;
    background-color: var(--color-light-gray);
    border-radius: 20px;
    transition: all var(--transition-speed) ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--box-shadow-hover);
    background-color: var(--color-white);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 30px;
    background-color: var(--color-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--color-white);
    transition: all var(--transition-speed) ease;
}

.feature-card:hover .feature-icon {
    transform: scale(1.1) rotate(5deg);
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 20px;
}

.feature-description {
    color: var(--color-text-light);
    line-height: 1.8;
}

/* ===================================
   ギャラリーセクション
   =================================== */
.gallery {
    background-color: var(--color-light-gray);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 60px;
}

.gallery-item:nth-child(7) {
    grid-column: 2 / 3;
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: 15px;
    aspect-ratio: 4/3;
    cursor: pointer;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(44, 62, 80, 0.9), rgba(52, 73, 94, 0.8));
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-speed) ease;
}

.gallery-item:hover .gallery-overlay {
    opacity: 1;
}

.gallery-item:hover img {
    transform: scale(1.1);
}

.gallery-text {
    color: var(--color-white);
    font-size: 1.3rem;
    font-weight: 500;
    letter-spacing: 1px;
}

/* ===================================
   ポジショニングマップセクション
   =================================== */
.positioning {
    background-color: var(--color-white);
    padding: 100px 0;
}

.positioning-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-top: 60px;
}

.positioning-map {
    background-color: var(--color-light-gray);
    border-radius: 20px;
    padding: 40px;
    box-shadow: var(--box-shadow);
    transition: all var(--transition-speed) ease;
}

.positioning-map:hover {
    box-shadow: var(--box-shadow-hover);
    transform: translateY(-5px);
}

.positioning-map img {
    width: 100%;
    height: auto;
    border-radius: 10px;
}

.positioning-description {
    padding: 20px;
}

.positioning-subtitle {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 20px;
    line-height: 1.4;
}

.positioning-description > p {
    color: var(--color-text-light);
    line-height: 1.9;
    font-size: 1.05rem;
    margin-bottom: 40px;
}

.positioning-points {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.positioning-point {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    padding: 20px;
    background-color: var(--color-light-gray);
    border-radius: 15px;
    transition: all var(--transition-speed) ease;
}

.positioning-point:hover {
    background-color: var(--color-white);
    box-shadow: var(--box-shadow);
    transform: translateX(5px);
}

.point-icon {
    width: 40px;
    height: 40px;
    background-color: var(--color-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    font-size: 1.2rem;
    flex-shrink: 0;
}

.point-content h4 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.point-content p {
    color: var(--color-text-light);
    line-height: 1.7;
    font-size: 0.95rem;
}

/* ===================================
   用途例セクション
   =================================== */
.uses {
    background-color: var(--color-light-gray);
}

.uses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.use-card {
    background-color: var(--color-white);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: all var(--transition-speed) ease;
}

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

.use-image {
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.use-image img {
    width: 100%;
    height: 100%;
    min-height: 350px;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

/* ===================================
   お知らせセクション
   =================================== */
.news {
    background-color: var(--color-white);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.news-card {
    background-color: var(--color-white);
    border: 1px solid #e0e0e0;
    border-radius: 15px;
    padding: 30px;
    transition: all var(--transition-speed) ease;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.news-card:hover {
    box-shadow: var(--box-shadow-hover);
    transform: translateY(-5px);
    border-color: var(--color-primary);
}

.news-date {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}

.news-date time {
    font-size: 0.95rem;
    color: var(--color-text-light);
    font-weight: 500;
}

.news-category {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.category-release {
    background-color: #e3f2fd;
    color: #1976d2;
}

.category-product {
    background-color: #f3e5f5;
    color: #7b1fa2;
}

.category-event {
    background-color: #fff3e0;
    color: #e65100;
}

.news-title {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--color-primary);
    line-height: 1.5;
    margin: 0;
}

.news-excerpt {
    color: var(--color-text-light);
    line-height: 1.8;
    font-size: 0.95rem;
    flex-grow: 1;
}

.news-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--color-primary);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-speed) ease;
    font-size: 0.95rem;
}

.news-link:hover {
    color: var(--color-secondary);
    gap: 12px;
}

.news-link i {
    font-size: 0.85rem;
    transition: transform var(--transition-speed) ease;
}

.news-link:hover i {
    transform: translateX(3px);
}

.news-more {
    text-align: center;
    margin-top: 60px;
}

.btn-secondary {
    background-color: var(--color-white);
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

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

/* ===================================
   Instagramセクション
   =================================== */
.instagram-section {
    background-color: var(--color-white);
    padding: 100px 0;
}

.instagram-content {
    margin-top: 60px;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.instagram-follow {
    text-align: center;
    margin-top: 50px;
}

.btn-instagram {
    background: linear-gradient(135deg, #833AB4 0%, #FD1D1D 50%, #FCB045 100%);
    color: var(--color-white);
    border: none;
    padding: 15px 40px;
    font-size: 1.1rem;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 12px;
    transition: all var(--transition-speed) ease;
}

.btn-instagram:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(131, 58, 180, 0.3);
}

.btn-instagram i {
    font-size: 1.3rem;
}

/* ===================================
   お知らせ一覧ページ
   =================================== */
.breadcrumb-section {
    background-color: var(--color-light-gray);
    padding: 20px 0;
    margin-top: 80px;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
}

.breadcrumb a {
    color: var(--color-text-light);
    text-decoration: none;
    transition: color var(--transition-speed) ease;
}

.breadcrumb a:hover {
    color: var(--color-primary);
}

.breadcrumb-separator {
    color: var(--color-text-light);
}

.breadcrumb-current {
    color: var(--color-primary);
    font-weight: 600;
}

.news-list-section {
    padding: 80px 0;
}

.page-title {
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-primary);
    text-align: center;
    margin-bottom: 20px;
}

.page-subtitle {
    text-align: center;
    color: var(--color-text-light);
    font-size: 1.1rem;
    margin-bottom: 60px;
}

.news-filter {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 60px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 25px;
    background-color: var(--color-white);
    border: 2px solid #e0e0e0;
    border-radius: 25px;
    color: var(--color-text);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
}

.filter-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.filter-btn.active {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-white);
}

.news-list {
    display: flex;
    flex-direction: column;
    gap: 40px;
    max-width: 900px;
    margin: 0 auto;
}

.news-item {
    background-color: var(--color-white);
    border: 1px solid #e0e0e0;
    border-radius: 15px;
    padding: 40px;
    transition: all var(--transition-speed) ease;
}

.news-item:hover {
    box-shadow: var(--box-shadow-hover);
    transform: translateY(-3px);
    border-color: var(--color-primary);
}

.news-item-date {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.news-item-date time {
    font-size: 1rem;
    color: var(--color-text-light);
    font-weight: 500;
}

.news-item-title {
    margin: 0 0 20px 0;
}

.news-item-title a {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-speed) ease;
    display: block;
    line-height: 1.5;
}

.news-item-title a:hover {
    color: var(--color-secondary);
}

.news-item-excerpt {
    color: var(--color-text-light);
    line-height: 1.9;
    font-size: 1.05rem;
    margin-bottom: 20px;
}

.news-item-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--color-primary);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-speed) ease;
    font-size: 1rem;
}

.news-item-link:hover {
    color: var(--color-secondary);
    gap: 12px;
}

.news-item-link i {
    font-size: 0.9rem;
    transition: transform var(--transition-speed) ease;
}

.news-item-link:hover i {
    transform: translateX(3px);
}

/* ===================================
   産地紹介セクション
   =================================== */
.origin {
    position: relative;
    padding: 150px 0;
    overflow: hidden;
}

.origin-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('https://www.genspark.ai/api/hub_files/download/white-birch-hub/IMG_20251106_140010.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.origin-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(44, 62, 80, 0.85), rgba(52, 73, 94, 0.75));
}

.origin-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    color: var(--color-white);
}

.origin-title {
    font-family: var(--font-serif);
    font-size: 2.8rem;
    font-weight: 600;
    margin-bottom: 30px;
    letter-spacing: 2px;
}

.origin-description {
    font-size: 1.15rem;
    line-height: 2;
    font-weight: 300;
}

/* ===================================
   CTAセクション
   =================================== */
.cta-section {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: var(--color-white);
    padding: 100px 0;
}

.cta-content {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.cta-title {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 30px;
    line-height: 1.4;
}

.cta-description {
    font-size: 1.15rem;
    margin-bottom: 50px;
    line-height: 1.9;
    opacity: 0.95;
}

/* ===================================
   問い合わせセクション
   =================================== */
.contact {
    background-color: var(--color-light-gray);
}

.contact-form-container {
    max-width: 800px;
    margin: 60px auto 40px;
    background-color: var(--color-white);
    border-radius: 20px;
    box-shadow: var(--box-shadow);
    overflow: hidden;
}

.contact-form-container iframe {
    display: block;
    border: none;
}

.contact-info-bottom {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 40px;
    flex-wrap: wrap;
}

.contact-info-item {
    background-color: var(--color-white);
    padding: 30px;
    border-radius: 15px;
    box-shadow: var(--box-shadow);
    display: flex;
    gap: 20px;
    align-items: center;
    min-width: 300px;
}

.contact-info-icon {
    width: 50px;
    height: 50px;
    background-color: var(--color-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    font-size: 1.3rem;
    flex-shrink: 0;
}

.contact-info-content h4 {
    color: var(--color-primary);
    margin-bottom: 10px;
    font-size: 1.1rem;
}

.contact-info-content p {
    color: var(--color-text-light);
    line-height: 1.6;
}

.contact-info-content a {
    color: var(--color-primary);
}

.contact-info-content a:hover {
    text-decoration: underline;
}

/* ===================================
   フッター
   =================================== */
.footer {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 50px;
}

.footer-logo img {
    height: 40px;
    margin-bottom: 20px;
    filter: brightness(0) invert(1);
}

.footer-description {
    line-height: 1.8;
    opacity: 0.9;
}

.footer-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-links,
.footer-contact {
    list-style: none;
}

.footer-links li,
.footer-contact li {
    margin-bottom: 12px;
}

.footer-note {
    font-size: 0.85rem;
    opacity: 0.8;
    display: inline-block;
    margin-top: 4px;
}

.footer-links a {
    opacity: 0.9;
    transition: all var(--transition-speed) ease;
}

.footer-links a:hover {
    opacity: 1;
    padding-left: 5px;
}

.footer-contact li {
    display: flex;
    align-items: center;
    gap: 10px;
    opacity: 0.9;
}

.footer-social {
    display: flex;
    gap: 15px;
}

.footer-social a {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: all var(--transition-speed) ease;
}

.footer-social a:hover {
    background-color: var(--color-white);
    color: var(--color-primary);
    transform: translateY(-3px);
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    display: flex;
    justify-content: space-between;
    align-items: center;
    opacity: 0.8;
}

.footer-bottom-links {
    display: flex;
    gap: 30px;
}

.footer-bottom-links a:hover {
    text-decoration: underline;
}

/* ===================================
   トップに戻るボタン
   =================================== */
.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--color-primary);
    color: var(--color-white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-speed) ease;
    z-index: 999;
    box-shadow: 0 4px 15px rgba(44, 62, 80, 0.3);
}

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

.scroll-to-top:hover {
    background-color: var(--color-secondary);
    transform: translateY(-5px);
    box-shadow: 0 6px 20px rgba(44, 62, 80, 0.4);
}

/* ===================================
   アニメーション
   =================================== */
.fade-in {
    animation: fadeIn 1.2s ease-out;
}

.fade-in-delay {
    animation: fadeIn 1.2s ease-out 0.3s both;
}

.fade-in-delay-2 {
    animation: fadeIn 1.2s ease-out 0.6s both;
}

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

.reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.8s ease-out;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* ===================================
   レスポンシブ
   =================================== */
@media (max-width: 1024px) {
    .positioning-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-info-bottom {
        gap: 30px;
    }
}

@media (max-width: 768px) {
    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        height: 100vh;
        background-color: var(--color-white);
        box-shadow: -5px 0 20px rgba(0, 0, 0, 0.1);
        transition: right var(--transition-speed) ease;
        padding-top: 100px;
    }
    
    .nav.active {
        right: 0;
    }
    
    .nav-list {
        flex-direction: column;
        align-items: flex-start;
        padding-left: 40px;
        gap: 30px;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }
    
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .features-grid,
    .gallery-grid,
    .uses-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-info-bottom {
        flex-direction: column;
        align-items: center;
    }
    
    .contact-info-item {
        min-width: auto;
        width: 100%;
        max-width: 400px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.8rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .btn {
        padding: 12px 32px;
        font-size: 0.95rem;
    }
    
    section {
        padding: 60px 0;
    }
    
    .origin-title,
    .cta-title {
        font-size: 1.8rem;
    }
    
    .use-image img {
        height: 250px;
    }
}