:root {
    --color-black: #0a0a0a;
    --color-dark: #1a1a1a;
    --color-gray: #2a2a2a;
    --color-light: #f5f5f5;
    --color-white: #ffffff;
    --color-gold: #c6a969;
    --color-gold-light: #d6c08d;
    --color-gold-dark: #a8925a;
    --color-light-black: #292929;
    --font-primary: 'Noto Sans JP', sans-serif;
    --container-width: 1200px;
    --section-padding: 100px 0;
    --transition: all 0.3s ease;
}

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

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--color-light);
    background-color: var(--color-black);
    font-weight: 300;
    overflow-x: hidden;
}

.container {
    width: 90%;
    max-width: var(--container-width);
    margin: 0 auto;
}

.section {
    padding: var(--section-padding);
}

/* ローディング画面 */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-black);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease-out;
}

.loading-content {
    text-align: center;
}

.loading-logo {
    margin-bottom: 40px;
}

.logo-text {
    font-size: 2.5rem;
    color: var(--color-white);
    font-weight: 300;
    letter-spacing: 2px;
}

.gold-bar {
    width: 60px;
    height: 2px;
    background: var(--color-gold);
    margin: 15px auto;
}

.loading-spinner {
    display: flex;
    justify-content: center;
}

.spinner-ring {
    width: 40px;
    height: 40px;
    border: 2px solid rgba(198, 169, 105, 0.2);
    border-top: 2px solid var(--color-gold);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

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

body.loading {
    overflow: hidden;
}

/* ヘッダー */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition);
    border-bottom: 1px solid rgba(198, 169, 105, 0.1);
}

.header.scrolled {
    padding: 15px 0;
    background-color: rgba(10, 10, 10, 0.98);
}

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

.logo-wrapper {
    position: relative;
}

.logo {
    font-size: 1.8rem;
    font-weight: 300;
    color: var(--color-white);
    letter-spacing: 1px;
}

.logo span {
    color: var(--color-gold);
    font-weight: 400;
}

.logo-accent {
    position: absolute;
    bottom: -5px;
    right: -10px;
    width: 8px;
    height: 8px;
    background: var(--color-gold);
    border-radius: 50%;
}

.nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav ul li a {
    text-decoration: none;
    color: var(--color-light);
    font-weight: 300;
    transition: var(--transition);
    position: relative;
    padding: 5px 0;
    font-size: 0.9rem;
}

.nav ul li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-gold);
    transition: width 0.3s ease;
}

.nav ul li a:hover::after {
    width: 100%;
}

.nav ul li a:hover {
    color: var(--color-gold);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.language-switcher {
    display: flex;
    gap: 5px;
}

.language-btn {
    background: none;
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--color-light);
    padding: 5px 10px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.8rem;
    font-weight: 300;
}

.language-btn.active {
    background-color: var(--color-gold);
    border-color: var(--color-gold);
    color: var(--color-black);
}

.language-btn:hover {
    background-color: var(--color-gold);
    border-color: var(--color-gold);
    color: var(--color-black);
}

.hamburger {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    width: 24px;
    height: 18px;
    position: relative;
}

.hamburger span {
    width: 100%;
    height: 2px;
    background-color: var(--color-light);
    transition: var(--transition);
    position: absolute;
}

.hamburger span:nth-child(1) {
    top: 0;
}

.hamburger span:nth-child(2) {
    top: 8px;
}

.hamburger span:nth-child(3) {
    top: 16px;
}

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

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

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

/* ヒーロースライダー */
.hero-slider {
    position: relative;
    height: 100vh;
    overflow: hidden;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s ease;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.hero-slide.active {
    opacity: 1;
}

.slide-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(10, 10, 10, 0.8), rgba(10, 10, 10, 0.4));
}

/* .slide-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    padding-top: 180px;
} */

.slide-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 2;
    text-align: center;
    max-width: 800px;
    width: 90%;
    padding: 0;
}

.slide-content h2 {
    font-size: 3.5rem;
    font-weight: 300;
    margin-bottom: 20px;
    line-height: 1.2;
}

.slide-content p {
    font-size: 1.2rem;
    font-weight: 300;
    margin-bottom: 30px;
    opacity: 0.9;
}

.slide-indicator {
    margin-top: 40px;
}

.gold-line {
    width: 100px;
    height: 2px;
    background: var(--color-gold);
    margin: 0 auto;
}

.slider-controls {
    position: absolute;
    top: 50%;
    width: 100%;
    display: flex;
    justify-content: space-between;
    transform: translateY(-50%);
    padding: 0 20px;
    z-index: 3;
}

.slider-btn {
    background: rgba(198, 169, 105, 0.2);
    border: none;
    color: var(--color-white);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(5px);
}

.slider-btn:hover {
    background: var(--color-gold);
    color: var(--color-black);
}

.slider-pagination {
    position: absolute;
    bottom: 40px;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: center;
    z-index: 3;
}

.pagination-dots {
    display: flex;
    gap: 10px;
}

.pagination-dots .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: var(--transition);
}

.pagination-dots .dot.active {
    background: var(--color-gold);
}

/* セクション共通スタイル */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 300;
    color: var(--color-white);
    margin-bottom: 15px;
    position: relative;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 1s ease, transform 1s ease;
}

.section-title.visible {
    opacity: 1;
    transform: translateY(0);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--color-gold-light);
    margin-bottom: 20px;
    font-weight: 300;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 1s ease 0.2s, transform 1s ease 0.2s;
}

.section-subtitle.visible {
    opacity: 1;
    transform: translateY(0);
}

.title-accent {
    width: 60px;
    height: 2px;
    background: var(--color-gold);
    margin: 0 auto;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 1s ease 0.4s, transform 1s ease 0.4s;
}

.title-accent.visible {
    opacity: 1;
    transform: translateY(0);
}

.section-footer {
    text-align: center;
    margin-top: 60px;
}

.more-button {
    background: none;
    border: none;
    color: var(--color-gold);
    font-size: 1rem;
    font-weight: 300;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    padding: 10px 0;
}

.more-button span {
    position: relative;
    z-index: 2;
}

.button-line {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: var(--color-gold);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.more-button:hover .button-line {
    transform: scaleX(1);
}

/* 製品紹介 */
.products-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.product-video {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 1s ease, transform 1s ease;
}

.product-video.visible {
    opacity: 1;
    transform: translateX(0);
}

.video-container {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

/* .video-container iframe {
    width: 100%;
    height: 315px;
    border: none;
    display: block;
}

.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, rgba(198, 169, 105, 0.8), transparent);
    pointer-events: none;
} */

.video-container iframe {
    width: 100%;
    height: 315px;
    border: none;
    display: block;
    filter: grayscale(100%);
    transition: filter 0.5s ease;
}

.video-container:hover iframe {
    filter: grayscale(0%);
}

.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, rgba(198, 169, 105, 0.8), transparent);
    pointer-events: none;
    mix-blend-mode: soft-light;
}

.product-list {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.product-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 25px;
    background: var(--color-dark);
    border-left: 2px solid var(--color-gold);
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.product-item.visible {
    opacity: 1;
    transform: translateX(0);
}

.product-item:hover {
    background: var(--color-gray);
}

.product-icon {
    width: 60px;
    height: 60px;
    background: rgba(198, 169, 105, 0.1);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-gold);
    font-size: 1.5rem;
}

.product-details h3 {
    font-size: 1.2rem;
    font-weight: 400;
    margin-bottom: 8px;
    color: var(--color-white);
}

.product-details p {
    font-size: 0.9rem;
    color: var(--color-gold-light);
    font-weight: 300;
}

/* サービス紹介 */

#services {
    background-color: var(--color-light-black);
}

#services h2 {
    color: var(--color-gold);
}

.services-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.service-item {
    background: var(--color-dark);
    padding: 40px 30px;
    position: relative;
    overflow: hidden;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.service-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.service-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(198, 169, 105, 0.05), transparent);
    opacity: 0;
    transition: var(--transition);
}

.service-item:hover::before {
    opacity: 1;
}

.service-number {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 3rem;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.03);
}

.service-content {
    position: relative;
    z-index: 2;
    text-align: center;
}

.service-icon {
    width: 70px;
    height: 70px;
    background: rgba(198, 169, 105, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    color: var(--color-gold);
    font-size: 1.8rem;
    transition: var(--transition);
}

.service-item:hover .service-icon {
    background: var(--color-gold);
    color: var(--color-black);
}

.service-content h3 {
    font-size: 1.3rem;
    font-weight: 400;
    margin-bottom: 15px;
    color: var(--color-white);
}

.service-content p {
    font-size: 0.95rem;
    color: var(--color-gold-light);
    font-weight: 300;
    line-height: 1.6;
}

/* パートナー */
.partners-showcase {
    margin-top: 40px;
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
}

.partner-logo {
    background: var(--color-dark);
    padding: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 150px;
    transition: var(--transition);
    opacity: 0;
    transform: translateY(20px);
}

.partner-logo.visible {
    opacity: 1;
    transform: translateY(0);
}

.partner-logo:hover {
    background: var(--color-gray);
    transform: translateY(-5px);
}

.partner-logo img {
    max-width: 80%;
    max-height: 60px;
    filter: grayscale(100%) brightness(200%);
    opacity: 0.7;
    transition: var(--transition);
}

.partner-logo:hover img {
    filter: grayscale(0%) brightness(100%);
    opacity: 1;
}

/* 強み */

/* 強みセクション */
.strengths {
    background: var(--color-dark);
}

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

.strengths-list {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.strength-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 25px;
    background: rgba(255, 255, 255, 0.05);
    border-left: 3px solid var(--color-gold);
    transition: var(--transition);
    opacity: 0;
    transform: translateX(-30px);
}

.strength-item.visible {
    opacity: 1;
    transform: translateX(0);
}

.strength-item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(10px);
}

.strength-number {
    font-size: 2rem;
    font-weight: 300;
    color: var(--color-gold);
    min-width: 50px;
}

.strength-details h3 {
    font-size: 1.2rem;
    font-weight: 400;
    margin-bottom: 10px;
    color: var(--color-white);
}

.strength-details p {
    font-size: 0.9rem;
    color: var(--color-gold-light);
    font-weight: 300;
    line-height: 1.6;
}

.strength-image {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 1s ease, transform 1s ease;
}

.strength-image.visible {
    opacity: 1;
    transform: translateX(0);
}

.image-wrapper {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.image-wrapper img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    display: block;
}

.image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, rgba(198, 169, 105, 0.1), transparent);
}

/* レスポンシブ対応 */
@media (max-width: 1024px) {
    .strengths-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .strength-image {
        order: -1;
    }
}

@media (max-width: 768px) {
    .strength-item {
        flex-direction: column;
        gap: 15px;
    }
    
    .strength-number {
        font-size: 1.8rem;
    }
    
    .image-wrapper img {
        height: 300px;
    }
}

/* ショッピングモール */
.malls-display {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.mall-card {
    background: var(--color-dark);
    padding: 40px 30px;
    text-align: center;
    transition: var(--transition);
    opacity: 0;
    transform: translateY(20px);
}

.mall-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.mall-card:hover {
    background: var(--color-gray);
    transform: translateY(-5px);
}

.mall-icon {
    font-size: 2.5rem;
    color: var(--color-gold);
    margin-bottom: 20px;
    transition: var(--transition);
}

.mall-card:hover .mall-icon {
    transform: scale(1.1);
}

.mall-card h3 {
    font-size: 1.2rem;
    font-weight: 400;
    margin-bottom: 15px;
    color: var(--color-white);
}

.mall-card p {
    font-size: 0.9rem;
    color: var(--color-gold-light);
    margin-bottom: 25px;
    font-weight: 300;
}

.mall-link {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--color-gold);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

.mall-link:hover {
    gap: 15px;
}

/* フッター */
.footer {
    background: var(--color-dark);
    padding: 80px 0 30px;
    border-top: 1px solid rgba(198, 169, 105, 0.1);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-main {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.footer-brand h3 {
    font-size: 1.8rem;
    font-weight: 300;
    color: var(--color-white);
    margin-bottom: 10px;
}

.footer-brand h3 span {
    color: var(--color-gold);
}

.footer-brand p {
    font-size: 0.9rem;
    color: var(--color-gold-light);
    font-weight: 300;
}

.footer-info address p {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
    font-size: 0.9rem;
    font-weight: 300;
    color: var(--color-light);
    font-style: normal;
}

.footer-info i {
    color: var(--color-gold);
    width: 16px;
}

.footer-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.link-group h4 {
    font-size: 1.1rem;
    font-weight: 400;
    color: var(--color-white);
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.link-group h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 1px;
    background: var(--color-gold);
}

.link-group ul {
    list-style: none;
}

.link-group ul li {
    margin-bottom: 12px;
}

.link-group ul li a {
    color: var(--color-gold-light);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 300;
    transition: var(--transition);
    display: inline-block;
}

.link-group ul li a:hover {
    color: var(--color-gold);
    transform: translateX(5px);
}

.footer-social h4 {
    font-size: 1.1rem;
    font-weight: 400;
    color: var(--color-white);
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-social h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 1px;
    background: var(--color-gold);
}

.social-icons {
    display: flex;
    gap: 15px;
    margin-bottom: 30px;
}

.social-icons a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--color-light);
    text-decoration: none;
    transition: var(--transition);
}

.social-icons a:hover {
    background: var(--color-gold);
    color: var(--color-black);
    transform: translateY(-3px);
}

.newsletter h4 {
    font-size: 1.1rem;
    font-weight: 400;
    color: var(--color-white);
    margin-bottom: 15px;
}

.newsletter-form {
    display: flex;
    gap: 10px;
}

.newsletter-form input {
    flex: 1;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 10px 15px;
    color: var(--color-light);
    font-family: var(--font-primary);
    font-size: 0.9rem;
    border-radius: 4px;
}

.newsletter-form input::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.newsletter-form button {
    background: var(--color-gold);
    border: none;
    padding: 10px 20px;
    color: var(--color-black);
    font-family: var(--font-primary);
    font-size: 0.9rem;
    font-weight: 400;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
}

.newsletter-form button:hover {
    background: var(--color-gold-light);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    font-size: 0.9rem;
    color: var(--color-gold-light);
    font-weight: 300;
}

/* レスポンシブデザイン */
@media (max-width: 1024px) {
    .products-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .services-list {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 80px 0;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .nav {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--color-black);
        transition: left 0.3s;
        padding: 40px 20px;
        z-index: 999;
    }
    
    .nav.active {
        left: 0;
    }
    
    .nav ul {
        flex-direction: column;
        gap: 20px;
    }
    
    .nav ul li a {
        font-size: 1.1rem;
        padding: 10px 0;
        display: block;
    }
    
    .hamburger {
        display: flex;
    }
    
    .slide-content h2 {
        font-size: 2.5rem;
    }
    
    .slide-content p {
        font-size: 1rem;
    }
    
    .services-list {
        grid-template-columns: 1fr;
    }
    
    .partners-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }
    
    .malls-display {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

@media (max-width: 480px) {
    .section-title {
        font-size: 1.8rem;
    }
    
    /* .slide-content {
        padding-top: 150px;
    } */
    
    .slide-content h2 {
        font-size: 2rem;
    }
    
    .product-item {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    
    .slider-btn {
        width: 40px;
        height: 40px;
    }
    
    .logo {
        font-size: 1.5rem;
    }
}