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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 500;
    line-height: 1.2;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 4px;
    font-weight: 500;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    text-decoration: none;
}

.btn-primary {
    background-color: #0066cc;
    color: white;
}

.btn-primary:hover {
    background-color: #0052a3;
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background-color: white;
    color: #0066cc;
}

.btn-outline {
    background-color: transparent;
    color: #0066cc;
    border: 2px solid #0066cc;
}

.btn-outline:hover {
    background-color: #0066cc;
    color: white;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: all 0.3s ease;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.header.scrolled {
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #0066cc;
}

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

.nav-item {
    position: relative;
}

.nav-link {
    font-weight: 500;
    color: #333;
    padding: 10px 0;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: #0066cc;
}

.dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: white;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    border-radius: 4px;
    padding: 10px 0;
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    list-style: none;
}

.nav-item:hover .dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown li {
    padding: 0;
}

.dropdown a {
    display: block;
    padding: 8px 20px;
    color: #666;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.dropdown a:hover {
    background-color: #f8f9fa;
    color: #0066cc;
}

/* Mobile Menu */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: #333;
    transition: all 0.3s ease;
}

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

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

.hero-fallback-image {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-size: cover;
    background-position: center;
}

.hero-content {
    text-align: center;
    color: white;
    z-index: 2;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    opacity: 0;
    animation: fadeInUp 1s ease 0.5s forwards;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 40px;
    opacity: 0;
    animation: fadeInUp 1s ease 0.7s forwards;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    opacity: 0;
    animation: fadeInUp 1s ease 0.9s forwards;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    animation: fadeIn 1s ease 1.5s forwards;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid white;
    border-bottom: 2px solid white;
    transform: rotate(45deg);
    animation: bounce 2s infinite;
}

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0) rotate(45deg);
    }
    40% {
        transform: translateY(-10px) rotate(45deg);
    }
    60% {
        transform: translateY(-5px) rotate(45deg);
    }
}

/* Section Styles */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #333;
    margin-bottom: 15px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

.section-footer {
    text-align: center;
    margin-top: 50px;
}

/* News Section */
.news-section {
    padding: 100px 0;
    background-color: #f8f9fa;
}

.news-list {
    max-width: 800px;
    margin: 0 auto;
}

.news-item {
    display: flex;
    align-items: center;
    padding: 25px 0;
    border-bottom: 1px solid #e9ecef;
    transition: all 0.3s ease;
}

.news-item:hover {
    background-color: rgba(0, 102, 204, 0.05);
    padding-left: 20px;
    padding-right: 20px;
    margin-left: -20px;
    margin-right: -20px;
    border-radius: 8px;
}

.news-date {
    font-size: 0.9rem;
    color: #666;
    min-width: 100px;
    margin-right: 20px;
}

.news-category {
    background-color: #0066cc;
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    margin-right: 20px;
    min-width: 60px;
    text-align: center;
}

.news-title {
    flex: 1;
    font-size: 1rem;
    font-weight: 500;
}

.news-title a {
    color: #333;
    transition: color 0.3s ease;
}

.news-title a:hover {
    color: #0066cc;
}

/* Company Introduction Section */
.company-intro-section {
    padding: 100px 0;
    background-color: white;
}

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

.intro-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #333;
    margin-bottom: 30px;
    line-height: 1.2;
}

.intro-description {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #666;
    margin-bottom: 40px;
}

.intro-stats {
    display: flex;
    gap: 40px;
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: #0066cc;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 0.9rem;
    color: #666;
    font-weight: 500;
}

.intro-visual {
    position: relative;
}

.intro-image {
    width: 100%;
    height: 400px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.intro-bg {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
}

.intro-bg::after {
    content: '💼';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 4rem;
    opacity: 0.8;
}

/* About Section */
.about-section {
    padding: 100px 0;
    background-color: white;
}

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

.about-item {
    position: relative;
    background-color: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
}

.about-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.about-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.about-item:hover .about-image img {
    transform: scale(1.05);
}

.about-content {
    padding: 25px;
}

.about-category {
    font-size: 0.8rem;
    color: #0066cc;
    font-weight: 700;
    letter-spacing: 1px;
    margin-bottom: 10px;
}

.about-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: #333;
    line-height: 1.4;
}

.about-link {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
}

/* Solutions Section */
.solutions-section {
    padding: 100px 0;
    background-color: #f8f9fa;
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.solution-item {
    position: relative;
    background-color: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
}

.solution-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.solution-image {
    width: 100%;
    height: 180px;
    overflow: hidden;
}

.solution-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.solution-item:hover .solution-image img {
    transform: scale(1.05);
}

.solution-content {
    padding: 25px;
}

.solution-category {
    font-size: 0.8rem;
    color: #0066cc;
    font-weight: 700;
    letter-spacing: 1px;
    margin-bottom: 15px;
}

.solution-title {
    font-size: 1.1rem;
    font-weight: 500;
    color: #333;
    line-height: 1.5;
}

.solution-link {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
}

/* Features Section */
.features-section {
    padding: 100px 0;
    background-color: white;
}

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

.feature-item {
    text-align: center;
    padding: 40px 30px;
    background-color: #f8f9fa;
    border-radius: 12px;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.feature-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
    border-color: #0066cc;
    background-color: white;
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    display: block;
}

.feature-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 15px;
}

.feature-description {
    font-size: 1rem;
    line-height: 1.6;
    color: #666;
}

/* CTA Sections */
.cta-sections {
    display: grid;
    grid-template-columns: 1fr 1fr;
}

.cta-recruit,
.cta-contact {
    position: relative;
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

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

.cta-background::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    z-index: 2;
}

.cta-background img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.cta-content {
    position: relative;
    z-index: 3;
    text-align: center;
    color: white;
}

.cta-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.cta-divider {
    width: 60px;
    height: 2px;
    background-color: white;
    margin: 0 auto 20px;
}

.cta-link {
    font-size: 1.1rem;
    font-weight: 500;
    color: white;
    transition: all 0.3s ease;
}

.cta-link:hover {
    color: #ffd700;
}

/* Footer */
.footer {
    background-color: #2c3e50;
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-logo h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 30px;
    color: white;
}

.footer-address p {
    margin-bottom: 5px;
    color: #bdc3c7;
    line-height: 1.6;
}

.footer-nav {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 30px;
}

.footer-nav-column h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: white;
}

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

.footer-nav-column li {
    margin-bottom: 8px;
}

.footer-nav-column a {
    color: #bdc3c7;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.footer-nav-column a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid #34495e;
    padding-top: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

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

.footer-links a {
    color: #bdc3c7;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: white;
}

.footer-copyright {
    color: #95a5a6;
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }

    /* Header */
    .nav {
        display: none;
    }

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

    .logo h1 {
        font-size: 1.2rem;
    }

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

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

    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }

    .btn {
        padding: 12px 25px;
        font-size: 0.9rem;
    }

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

    .news-section,
    .about-section,
    .solutions-section,
    .company-intro-section,
    .features-section {
        padding: 60px 0;
    }

    /* Company Introduction */
    .intro-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }

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

    .intro-stats {
        justify-content: center;
        gap: 30px;
    }

    .intro-image {
        height: 300px;
    }

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

    /* News */
    .news-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
        padding: 20px 0;
    }

    .news-date {
        min-width: auto;
        margin-right: 0;
    }

    .news-category {
        margin-right: 0;
        margin-bottom: 5px;
    }

    /* About & Solutions & Features */
    .about-grid,
    .solutions-grid,
    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        margin-top: 40px;
    }

    .feature-item {
        padding: 30px 20px;
    }

    /* CTA */
    .cta-sections {
        grid-template-columns: 1fr;
    }

    .cta-recruit,
    .cta-contact {
        height: 250px;
    }

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

    /* Footer */
    .footer {
        padding: 40px 0 20px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
        margin-bottom: 30px;
    }

    .footer-nav {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }

    .footer-links {
        justify-content: center;
        gap: 20px;
    }
}

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

    .hero-subtitle {
        font-size: 1rem;
    }

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

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

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

    .footer-links {
        flex-direction: column;
        gap: 10px;
    }
}

/* Utility Classes */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.slide-in-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: all 0.6s ease;
}

.slide-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.slide-in-right {
    opacity: 0;
    transform: translateX(50px);
    transition: all 0.6s ease;
}

.slide-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Performance Optimizations */
* {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Focus States for Accessibility */
a:focus,
button:focus {
    outline: 2px solid #0066cc;
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    .header,
    .hero,
    .cta-sections,
    .scroll-indicator {
        display: none;
    }

    body {
        font-size: 12pt;
        line-height: 1.4;
    }

    .section-title {
        font-size: 18pt;
        margin-bottom: 10pt;
    }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    .btn-primary {
        background-color: #000;
        border: 2px solid #000;
    }

    .btn-secondary {
        border-color: #000;
        color: #000;
    }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }
}