:root {
    /* Color Palette */
    --primary-bg: #FFFFFF;
    --dark-bg: #111827;
    --text-primary: #374151;
    --text-light: #F3F4F6;
    --accent-main: #10B981;
    /* Emerald Green */
    --accent-secondary: #F59E0B;
    /* Amber/Orange */
    --gray-light: #F9FAFB;
    --gray-border: #E5E7EB;

    /* Typography */
    --font-heading: 'Noto Sans JP', sans-serif;
    --font-body: 'Noto Sans JP', sans-serif;

    /* Spacing */
    --header-height: 80px;
    --section-padding: 100px 0;
}

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

html {
    scroll-behavior: smooth;
}

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

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

ul {
    list-style: none;
}

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

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Typography */
h1,
h2,
h3 {
    font-weight: 700;
    line-height: 1.3;
}

.section-title {
    font-size: 3rem;
    color: var(--text-primary);
    letter-spacing: 0.05em;
    margin-bottom: 10px;
    position: relative;
    display: inline-block;
}

.section-subtitle {
    font-size: 1rem;
    color: var(--accent-main);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 60px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 700;
    cursor: pointer;
    text-align: center;
    border: 2px solid transparent;
}

.btn-lg {
    padding: 15px 40px;
    font-size: 1.1rem;
}

.btn-primary {
    background-color: var(--accent-secondary);
    color: #fff;
    box-shadow: 0 4px 15px rgba(245, 158, 11, 0.3);
}

.btn-primary:hover {
    background-color: #d97706;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(245, 158, 11, 0.4);
}

.btn-alliance {
    background-color: var(--accent-main);
    color: #fff;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
}

.btn-alliance:hover {
    background-color: #059669;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4);
}

.btn-outline {
    background-color: transparent;
    color: #fff;
    border-color: #fff;
}

.btn-outline:hover {
    background-color: #fff;
    color: var(--dark-bg);
}

.btn-white {
    background-color: #fff;
    color: var(--accent-main);
}

.btn-white:hover {
    background-color: rgba(255, 255, 255, 0.9);
    color: var(--accent-main);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
    display: flex;
    align-items: center;
}

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

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--dark-bg);
    letter-spacing: -0.02em;
}

.logo-dot {
    color: var(--accent-main);
}

.nav-list {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-link {
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.95rem;
}

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

.nav-link.btn-primary {
    color: #fff;
    padding: 10px 25px;
}

/* Mobile Menu */
.mobile-menu-toggle {
    display: none;
    cursor: pointer;
    flex-direction: column;
    gap: 6px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 2px;
    background-color: var(--dark-bg);
    transition: 0.3s;
}

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    min-height: 700px;
    display: flex;
    align-items: center;
    color: #fff;
    overflow: hidden;
}

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

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(17, 24, 39, 0.8) 0%, rgba(17, 24, 39, 0.6) 100%);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: left;
}

.hero-title {
    font-size: 4.5rem;
    line-height: 1.2;
    margin-bottom: 20px;
    letter-spacing: 0.05em;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: 50px;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 20px;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
}

.mouse {
    width: 26px;
    height: 42px;
    border: 2px solid rgba(255, 255, 255, 0.6);
    border-radius: 20px;
    display: block;
    position: relative;
}

.wheel {
    width: 4px;
    height: 4px;
    background: #fff;
    border-radius: 50%;
    position: absolute;
    top: 4px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 1.5s infinite;
}

@keyframes scroll {
    0% {
        top: 4px;
        opacity: 1;
    }

    100% {
        top: 15px;
        opacity: 0;
    }
}

/* Sections Common */
.section {
    padding: var(--section-padding);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

/* Mission Section */
.mission {
    background-color: var(--primary-bg);
}

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

.mission-heading {
    font-size: 2.2rem;
    margin-bottom: 30px;
    color: var(--dark-bg);
    line-height: 1.4;
}

.mission-text p {
    margin-bottom: 20px;
    font-size: 1.05rem;
    color: var(--text-primary);
}

.mission-image {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.mission-image img {
    transition: transform 0.5s ease;
}

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

.image-accent {
    position: absolute;
    bottom: -20px;
    right: -20px;
    width: 150px;
    height: 150px;
    background-color: var(--accent-main);
    z-index: -1;
    border-radius: 20px;
    opacity: 0.2;
}

/* Services Section */
.services {
    background-color: var(--gray-light);
}

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

.service-card {
    background: #fff;
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.03);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-align: center;
}

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

.service-icon img {
    width: 80px;
    height: 80px;
    margin: 0 auto 25px;
}

.service-card h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: var(--dark-bg);
}

.service-card p {
    font-size: 0.95rem;
    line-height: 1.6;
    color: #666;
}

.services-cta {
    text-align: center;
}

.services-cta p {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--dark-bg);
}

/* Company Section */
.company-table {
    border-top: 1px solid var(--gray-border);
    max-width: 800px;
    margin: 0 auto;
}

.company-table dl {
    display: flex;
    padding: 25px 0;
    border-bottom: 1px solid var(--gray-border);
}

.company-table dt {
    width: 30%;
    font-weight: 700;
    color: var(--dark-bg);
    padding-left: 20px;
}

.company-table dd {
    width: 70%;
}

/* Contact Section */
.contact {
    background-color: var(--accent-main);
    color: #fff;
    padding: 80px 0;
    text-align: center;
}

.contact-box {
    max-width: 600px;
    margin: 0 auto;
}

.contact-title {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.contact-desc {
    font-size: 1.1rem;
    margin-bottom: 40px;
    opacity: 0.9;
}

/* Footer */
.footer {
    background-color: var(--dark-bg);
    color: var(--text-light);
    padding: 60px 0 20px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
    flex-wrap: wrap;
    gap: 30px;
}

.footer-logo {
    font-size: 2rem;
    font-weight: 700;
}

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

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

.footer-social {
    display: flex;
    gap: 20px;
}

.footer-social a {
    font-size: 1.2rem;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    transition: 0.3s;
}

.footer-social a:hover {
    background: var(--accent-main);
    transform: translateY(-3px);
}

.footer-copyright {
    text-align: center;
    font-size: 0.9rem;
    opacity: 0.6;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Responsive */
@media (max-width: 992px) {
    .section-title {
        font-size: 2.5rem;
    }

    .hero-title {
        font-size: 3.5rem;
    }

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

    .company-table dt {
        width: 40%;
    }

    .company-table dd {
        width: 60%;
    }
}

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

    .nav {
        display: block;
        position: fixed;
        top: 60px;
        left: 0;
        width: 100%;
        background: #fff;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        transform: translateY(-150%);
        transition: transform 0.3s ease;
        z-index: 999;
    }

    .nav.active {
        transform: translateY(0);
    }

    .nav-list {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }

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

    .hero-title {
        font-size: 2.8rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .hero-buttons .btn {
        width: 100%;
    }

    .company-table dl {
        flex-direction: column;
        gap: 5px;
    }

    .company-table dt {
        width: 100%;
        padding-left: 0;
    }

    .company-table dd {
        width: 100%;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-nav {
        flex-direction: column;
        gap: 15px;
    }
}

/* Animations */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

.delay-100 {
    transition-delay: 0.1s;
}

.delay-200 {
    transition-delay: 0.2s;
}

.logoHeader .logoFooter img {
    height: 45px;
    width: auto;
}

@media (max-width: 768px) {
    .logoHeader .logoFooter img {
        height: 35px;
        /* スマホでは少し小さく */
    }
}