/* CSS Variables */
:root {
    --color-primary: #1e3a8a;
    --color-accent: #f59e0b;
    --color-text: #374151;
    --color-text-light: #6b7280;
    --color-white: #ffffff;
    --color-bg-light: #f9fafb;
    --color-border: #e5e7eb;
    --font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --container-width: 1200px;
    --header-height: 80px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-white);
}

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

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

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

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: var(--transition);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo h1 {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.3;
}

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

.nav-list a {
    font-weight: 500;
    transition: var(--transition);
}

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

.btn-contact {
    background-color: var(--color-primary);
    color: var(--color-white) !important;
    padding: 10px 20px;
    border-radius: 25px;
    font-weight: 500;
}

.btn-contact:hover {
    background-color: var(--color-accent);
    color: var(--color-white) !important;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.menu-toggle span {
    width: 25px;
    height: 2px;
    background-color: var(--color-primary);
    transition: var(--transition);
}

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, #0f172a 100%);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><defs><radialGradient id="a" cx="50%" cy="50%" r="50%"><stop offset="0%" stop-color="%23f59e0b" stop-opacity="0.1"/><stop offset="100%" stop-color="%23f59e0b" stop-opacity="0"/></radialGradient></defs><circle cx="200" cy="200" r="100" fill="url(%23a)"/><circle cx="800" cy="300" r="150" fill="url(%23a)"/><circle cx="300" cy="700" r="120" fill="url(%23a)"/></svg>') no-repeat center center;
    background-size: cover;
    opacity: 0.3;
}

.hero-content {
    text-align: center;
    color: var(--color-white);
    z-index: 2;
    position: relative;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 900;
    margin-bottom: 20px;
    line-height: 1.2;
}

.title-main {
    display: block;
}

.title-accent {
    color: var(--color-accent);
    display: block;
}

.hero-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.3rem);
    margin-bottom: 40px;
    opacity: 0.9;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: var(--color-white);
    font-size: 12px;
    opacity: 0.7;
}

.scroll-arrow {
    width: 1px;
    height: 30px;
    background-color: var(--color-white);
    margin: 10px auto 0;
    position: relative;
    animation: scroll-bounce 2s infinite;
}

@keyframes scroll-bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(10px); }
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 15px 30px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 16px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background-color: #d97706;
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-white);
    border-color: var(--color-white);
}

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

.btn-outline {
    background-color: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

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

.btn-full {
    width: 100%;
}

/* Section Styling */
section {
    padding: 80px 0;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: 60px;
    color: var(--color-primary);
}

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

.mission-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.mission-text p {
    font-size: 18px;
    line-height: 1.8;
    margin-bottom: 30px;
}

.mission-main {
    color: var(--color-text-light);
}

.mission-challenge {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-primary);
}

.mission-commitment {
    font-weight: 500;
    color: var(--color-text);
}

/* Business Section */
.business-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.business-card {
    background-color: var(--color-white);
    padding: 40px 30px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
    border: 1px solid var(--color-border);
}

.business-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.card-icon {
    width: 60px;
    height: 60px;
    background-color: var(--color-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--color-white);
}

.card-icon svg {
    width: 30px;
    height: 30px;
}

.business-card h4 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--color-primary);
}

.business-card p {
    color: var(--color-text-light);
    line-height: 1.6;
}

/* Solutions Section */
.solutions {
    background-color: var(--color-bg-light);
}

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

.solution-item {
    text-align: center;
    padding: 40px 20px;
}

.solution-number {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--color-accent), #d97706);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    margin: 0 auto 20px;
}

.solution-item h4 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--color-primary);
}

.solution-item p {
    color: var(--color-text-light);
    line-height: 1.6;
}

/* News Section */
.news-list {
    max-width: 800px;
    margin: 0 auto;
}

.news-item {
    display: flex;
    padding: 25px 0;
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition);
}

.news-item:hover {
    background-color: var(--color-bg-light);
    margin: 0 -20px;
    padding: 25px 20px;
    border-radius: 10px;
}

.news-date {
    min-width: 120px;
    font-size: 14px;
    color: var(--color-text-light);
    font-weight: 500;
}

.news-content {
    flex: 1;
}

.news-category {
    display: inline-block;
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
    margin-bottom: 8px;
}

.news-item h4 {
    font-size: 16px;
    font-weight: 500;
    color: var(--color-text);
    line-height: 1.5;
}

.news-more {
    text-align: center;
    margin-top: 40px;
}

/* Contact Section */
.contact {
    background-color: var(--color-bg-light);
}

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

.contact-info h4 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--color-primary);
}

.contact-info p {
    font-size: 16px;
    line-height: 1.6;
    margin-bottom: 30px;
    color: var(--color-text-light);
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-method strong {
    display: block;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--color-primary);
}

.phone-number {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: 5px;
}

.phone-hours {
    font-size: 14px;
    color: var(--color-text-light);
}

/* Form */
.form {
    background-color: var(--color-white);
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
}

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

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--color-text);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 15px;
    border: 2px solid var(--color-border);
    border-radius: 8px;
    font-size: 16px;
    transition: var(--transition);
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* Footer */
.footer {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: 60px 0 20px;
}

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

.footer-main h2 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 20px;
}

.footer-main p {
    line-height: 1.8;
    opacity: 0.8;
}

.footer-nav {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-nav-column h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--color-accent);
}

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

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

.footer-nav-column a {
    opacity: 0.8;
    transition: var(--transition);
}

.footer-nav-column a:hover {
    opacity: 1;
    color: var(--color-accent);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: 20px;
    text-align: center;
    opacity: 0.7;
    font-size: 14px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--color-white);
        box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
        padding: 20px;
    }

    .nav.active {
        display: block;
    }

    .nav-list {
        flex-direction: column;
        gap: 15px;
        align-items: stretch;
    }

    .nav-list a {
        display: block;
        padding: 10px;
        text-align: center;
    }

    .menu-toggle {
        display: flex;
    }

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

    .btn {
        width: 100%;
        max-width: 300px;
    }

    .business-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

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

    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

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

    .news-item {
        flex-direction: column;
        gap: 10px;
    }

    .news-date {
        min-width: auto;
    }
}

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

    section {
        padding: 60px 0;
    }

    .hero-title {
        font-size: 2.2rem;
    }

    .business-card {
        padding: 30px 20px;
    }

    .form {
        padding: 30px 20px;
    }
}

/* Animation 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);
}