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

:root {
    --primary-dark: #1a1a1a;
    --primary-darker: #0f0f0f;
    --accent-gold: #d4af37;
    --accent-gold-light: #e6c547;
    --text-light: #f5f5f5;
    --text-muted: #b0b0b0;
    --border-color: #333333;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    color: var(--text-light);
    background-color: var(--primary-dark);
    line-height: 1.6;
}

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

/* Header */
.header {
    background: rgba(15, 15, 15, 0.95);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
}

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

.logo {
    flex-shrink: 0;
}

.logo-text {
    font-size: 24px;
    font-weight: 900;
    color: var(--accent-gold);
    letter-spacing: 2px;
}

.nav {
    display: flex;
    gap: 40px;
    flex: 1;
    justify-content: center;
}

.nav a {
    color: var(--text-light);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.header-cta {
    flex-shrink: 0;
}

/* Buttons */
.cta-btn {
    padding: 12px 32px;
    background: var(--accent-gold);
    color: var(--primary-dark);
    border: none;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: 'Noto Sans JP', sans-serif;
}

.cta-btn:hover {
    background: var(--accent-gold-light);
    transform: translateY(-2px);
}

.cta-primary {
    padding: 16px 48px;
    font-size: 16px;
}

.cta-submit {
    width: 100%;
    padding: 16px 32px;
    font-size: 16px;
}

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 1;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 15, 15, 0.6);
    z-index: 2;
}

.hero-content {
    position: relative;
    z-index: 3;
    text-align: center;
    padding: 40px;
    max-width: 800px;
}

.hero-title {
    font-size: 64px;
    font-weight: 900;
    margin-bottom: 20px;
    line-height: 1.2;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-muted);
    margin-bottom: 40px;
    font-weight: 400;
}

.portfolio-note {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 60px;
}

.portfolio-note-footer {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 20px;
}

/* Sections */
.problem,
.services,
.process,
.products,
.why-us,
.cases,
.faq,
.company-info,
.contact {
    padding: 100px 0;
}

.problem {
    background: linear-gradient(135deg, #1a1a1a 0%, #242424 100%);
}

.services {
    background: var(--primary-dark);
}

.process {
    background: linear-gradient(135deg, #242424 0%, #1a1a1a 100%);
}

.products {
    background: var(--primary-dark);
}

.why-us {
    background: linear-gradient(135deg, #1a1a1a 0%, #242424 100%);
}

.cases {
    background: var(--primary-dark);
}

.faq {
    background: linear-gradient(135deg, #242424 0%, #1a1a1a 100%);
}

.company-info {
    background: var(--primary-dark);
}

.contact {
    background: linear-gradient(135deg, #1a1a1a 0%, #242424 100%);
}

/* Section Titles */
.section-title {
    font-size: 48px;
    font-weight: 900;
    margin-bottom: 15px;
    text-align: center;
    letter-spacing: -1px;
}

.section-subtitle {
    font-size: 16px;
    color: var(--accent-gold);
    text-align: center;
    margin-bottom: 60px;
    font-weight: 600;
    letter-spacing: 2px;
}

/* Problem Section */
.problem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
}

.problem-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    padding: 40px;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.problem-card:hover {
    border-color: var(--accent-gold);
    background: rgba(212, 175, 55, 0.05);
}

.problem-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--accent-gold);
}

.problem-card p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.8;
}

/* Services Section */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
}

.service-item {
    text-align: center;
}

.service-image-placeholder {
    width: 200px;
    height: 200px;
    margin: 0 auto 30px;
    background: linear-gradient(135deg, #333333 0%, #1f1f1f 100%);
    border: 2px solid var(--accent-gold);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 600;
    color: var(--accent-gold);
}

.service-img {
    width: 200px;
    height: 200px;
    margin: 0 auto 30px;
    border: 2px solid var(--accent-gold);
    border-radius: 8px;
    object-fit: cover;
    display: block;
}

.service-item h3 {
    font-size: 18px;
    margin-bottom: 15px;
}

.service-item p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.8;
}

/* Process Section */
.process-timeline {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 50px;
}

.process-step {
    position: relative;
    padding-left: 80px;
}

.step-number {
    position: absolute;
    left: 0;
    top: 0;
    font-size: 48px;
    font-weight: 900;
    color: var(--accent-gold);
    opacity: 0.3;
}

.process-step h3 {
    font-size: 18px;
    margin-bottom: 15px;
    color: var(--text-light);
}

.process-step p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.8;
}

/* Products Section */
.products-showcase {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.product-img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: 8px;
    transition: transform 0.3s ease;
    border: 1px solid var(--border-color);
}

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

/* Why Us Section */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
}

.advantage-card {
    overflow: hidden;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.advantage-card:hover {
    border-color: var(--accent-gold);
}

.advantage-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
    display: block;
}

.advantage-card h3 {
    font-size: 18px;
    margin: 30px 30px 15px 30px;
}

.advantage-card p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.8;
    margin: 0 30px 30px 30px;
}

/* Cases Section */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.case-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    padding: 40px;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.case-card:hover {
    border-color: var(--accent-gold);
    background: rgba(212, 175, 55, 0.05);
}

.case-card h3 {
    font-size: 18px;
    margin-bottom: 20px;
    color: var(--accent-gold);
}

.case-card p {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 15px;
    line-height: 1.8;
}

.case-card strong {
    color: var(--text-light);
}

/* FAQ Section */
.faq-list {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    padding: 30px;
    margin-bottom: 20px;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.faq-item:hover {
    border-color: var(--accent-gold);
    background: rgba(212, 175, 55, 0.05);
}

.faq-item h3 {
    font-size: 16px;
    margin-bottom: 15px;
    color: var(--accent-gold);
}

.faq-item p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.8;
}

/* Company Info Section */
.company-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 60px;
}

.company-stat {
    text-align: center;
    padding: 40px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.company-stat h3 {
    font-size: 48px;
    color: var(--accent-gold);
    margin-bottom: 10px;
    font-weight: 900;
}

.company-stat p {
    font-size: 14px;
    color: var(--text-muted);
}

.company-description {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    padding: 40px;
    border-radius: 8px;
    text-align: center;
}

.company-description p {
    font-size: 15px;
    color: var(--text-muted);
    line-height: 1.9;
    margin-bottom: 20px;
}

.company-description p:last-child {
    margin-bottom: 0;
}

/* Contact Section */
.contact-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.contact-content > p {
    font-size: 16px;
    color: var(--text-muted);
    margin-bottom: 50px;
}

.contact-form-area {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    padding: 50px;
    border-radius: 8px;
}

.contact-form {
    text-align: left;
}

.form-group {
    margin-bottom: 25px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 14px 16px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-light);
    font-family: 'Noto Sans JP', sans-serif;
    font-size: 14px;
    transition: all 0.3s ease;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: var(--text-muted);
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--accent-gold);
    background: rgba(212, 175, 55, 0.1);
}

/* Footer */
.footer {
    background: var(--primary-darker);
    border-top: 1px solid var(--border-color);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 50px;
    margin-bottom: 40px;
}

.footer-section h4 {
    font-size: 16px;
    margin-bottom: 20px;
    color: var(--accent-gold);
}

.footer-section p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.8;
}

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

.footer-section ul li {
    margin-bottom: 12px;
}

.footer-section a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 30px;
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-container {
        flex-wrap: wrap;
        gap: 20px;
    }

    .nav {
        order: 3;
        width: 100%;
        justify-content: space-between;
        gap: 20px;
        flex-wrap: wrap;
    }

    .nav a {
        font-size: 12px;
    }

    .header-cta {
        order: 2;
    }

    .hero-title {
        font-size: 40px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .hero-content {
        padding: 20px;
    }

    .section-title {
        font-size: 36px;
    }

    .section-subtitle {
        margin-bottom: 40px;
    }

    .problem,
    .services,
    .process,
    .products,
    .why-us,
    .cases,
    .faq,
    .company-info,
    .contact {
        padding: 60px 0;
    }

    .problem-grid,
    .services-grid,
    .advantages-grid,
    .cases-grid {
        gap: 25px;
    }

    .process-timeline {
        gap: 30px;
    }

    .process-step {
        padding-left: 60px;
    }

    .step-number {
        font-size: 36px;
    }

    .products-showcase {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 15px;
    }

    .product-img {
        height: 200px;
    }

    .contact-form-area {
        padding: 30px;
    }

    .company-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
    }

    .company-stat h3 {
        font-size: 36px;
    }

    .footer-content {
        gap: 30px;
        grid-template-columns: 1fr;
    }

    .cta-btn {
        padding: 10px 24px;
        font-size: 13px;
    }

    .cta-primary {
        padding: 14px 40px;
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    .header-container {
        padding: 15px 0;
    }

    .logo-text {
        font-size: 18px;
    }

    .nav {
        order: 3;
        width: 100%;
        justify-content: center;
        gap: 10px;
        flex-wrap: wrap;
    }

    .nav a {
        font-size: 11px;
    }

    .hero-title {
        font-size: 28px;
    }

    .hero-subtitle {
        font-size: 14px;
    }

    .section-title {
        font-size: 28px;
    }

    .section-subtitle {
        font-size: 14px;
    }

    .problem,
    .services,
    .process,
    .products,
    .why-us,
    .cases,
    .faq,
    .company-info,
    .contact {
        padding: 40px 0;
    }

    .problem-grid,
    .services-grid,
    .advantages-grid,
    .cases-grid,
    .company-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .process-timeline {
        grid-template-columns: 1fr;
        gap: 25px;
    }

    .products-showcase {
        grid-template-columns: 1fr;
    }

    .product-img {
        height: 250px;
    }

    .service-item h3,
    .case-card h3,
    .faq-item h3 {
        font-size: 16px;
    }

    .service-item p,
    .problem-card p,
    .case-card p,
    .faq-item p {
        font-size: 13px;
    }

    .contact-form-area {
        padding: 20px;
    }

    .company-stat h3 {
        font-size: 28px;
    }
}