/* リセットCSS */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 基本設定 */
:root {
    --primary-color: #2E7D8A;
    --secondary-color: #F7B731;
    --accent-color: #5D9CEC;
    --text-color: #2C3E50;
    --light-gray: #E8ECEF;
    --background-color: #FAFBFC;
    --success-color: #27AE60;
    --white: #FFFFFF;
    
    --font-family: 'Noto Sans JP', sans-serif;
    --font-family-en: 'Inter', sans-serif;
    
    --border-radius: 8px;
    --border-radius-large: 12px;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.15);
    
    --transition: all 0.3s ease;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
}

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

/* ヘッダー */
.header {
    background: var(--white);
    box-shadow: var(--shadow);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo h1 {
    color: var(--primary-color);
    font-size: 1.5rem;
    font-weight: 700;
}

.nav {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: var(--transition);
}

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

.contact-btn {
    background: var(--primary-color);
    color: var(--white) !important;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.contact-btn:hover {
    background: #236B75;
    transform: translateY(-2px);
}

/* ヒーローセクション */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, var(--background-color) 0%, #F0F8FF 100%);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.highlight {
    color: var(--primary-color);
    position: relative;
}

.highlight::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--secondary-color);
    border-radius: 2px;
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    color: #5A6C7D;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, #236B75 100%);
    color: var(--white);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

.btn-large {
    padding: 1.25rem 2.5rem;
    font-size: 1.1rem;
}

.hero-visual {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.visual-card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--border-radius-large);
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

.visual-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.visual-card:nth-child(3) {
    grid-column: 1 / -1;
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.visual-card h3 {
    color: var(--primary-color);
    font-weight: 600;
}

/* セクション共通 */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.section-description {
    text-align: center;
    font-size: 1.1rem;
    color: #5A6C7D;
    margin-bottom: 3rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* 課題提起セクション */
.problems {
    padding: 80px 0;
    background: var(--white);
}

.problems-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.problem-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--background-color);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--secondary-color);
}

.check-icon {
    background: var(--success-color);
    color: var(--white);
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: bold;
    flex-shrink: 0;
}

.problems-summary {
    background: linear-gradient(135deg, var(--primary-color) 0%, #236B75 100%);
    color: var(--white);
    padding: 3rem;
    border-radius: var(--border-radius-large);
    text-align: center;
}

.problems-summary p {
    margin-bottom: 1rem;
}

.problems-summary p:last-child {
    margin-bottom: 0;
    font-size: 1.1rem;
}

/* サービス紹介セクション */
.services {
    padding: 80px 0;
    background: var(--background-color);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: var(--border-radius-large);
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.service-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.service-card p {
    color: #5A6C7D;
    line-height: 1.7;
}

/* 業務例セクション */
.works {
    padding: 80px 0;
    background: var(--white);
}

.works-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.work-card {
    background: var(--background-color);
    padding: 2rem;
    border-radius: var(--border-radius-large);
    border: 1px solid var(--light-gray);
    transition: var(--transition);
}

.work-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
    border-color: var(--primary-color);
}

.work-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.work-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.work-card ul {
    list-style: none;
}

.work-card li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: #5A6C7D;
}

.work-card li::before {
    content: '•';
    color: var(--secondary-color);
    position: absolute;
    left: 0;
    font-weight: bold;
}

.works-note {
    text-align: center;
    padding: 2rem;
    background: linear-gradient(135deg, var(--accent-color) 0%, #4A8BD9 100%);
    color: var(--white);
    border-radius: var(--border-radius-large);
    font-size: 1.1rem;
}

/* 実績セクション */
.achievements {
    padding: 80px 0;
    background: var(--background-color);
}

.achievements-logos {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.logo-item {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
    font-weight: 600;
    color: var(--primary-color);
    transition: var(--transition);
}

.logo-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

/* 会社概要セクション */
.about {
    padding: 80px 0;
    background: var(--white);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.about-text p {
    margin-bottom: 1.5rem;
    line-height: 1.8;
    color: #5A6C7D;
}

.info-table {
    background: var(--background-color);
    border-radius: var(--border-radius-large);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.info-row {
    display: grid;
    grid-template-columns: 120px 1fr;
    border-bottom: 1px solid var(--light-gray);
}

.info-row:last-child {
    border-bottom: none;
}

.info-label {
    background: var(--primary-color);
    color: var(--white);
    padding: 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
}

.info-value {
    padding: 1rem;
    background: var(--white);
    line-height: 1.6;
}

.info-value a {
    color: var(--primary-color);
    text-decoration: none;
}

.info-value a:hover {
    text-decoration: underline;
}

/* CTAセクション */
.cta {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, #236B75 100%);
    color: var(--white);
}

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

.cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.cta-description {
    font-size: 1.1rem;
    margin-bottom: 3rem;
    opacity: 0.9;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.cta .btn-primary {
    background: var(--secondary-color);
    color: var(--text-color);
}

.cta .btn-primary:hover {
    background: #E6A429;
}

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

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

.cta-note {
    opacity: 0.8;
    font-size: 0.9rem;
}

/* フッター */
.footer {
    background: var(--text-color);
    color: var(--white);
    padding: 3rem 0 1rem;
}

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

.footer-info h3 {
    margin-bottom: 0.5rem;
    color: var(--secondary-color);
}

.footer-info p {
    opacity: 0.8;
}

.footer-links {
    display: flex;
    gap: 2rem;
    justify-content: flex-end;
    align-items: center;
}

.footer-links a {
    color: var(--white);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--secondary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #4A5568;
    opacity: 0.6;
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav {
        gap: 1rem;
    }
    
    .hero {
        padding: 150px 0 60px;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .problems-grid {
        grid-template-columns: 1fr;
    }
    
    .problem-item {
        min-width: auto;
    }
    
    .services-grid,
    .works-grid {
        grid-template-columns: 1fr;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .info-row {
        grid-template-columns: 1fr;
    }
    
    .info-label {
        border-bottom: 1px solid var(--light-gray);
    }
    
    .cta-title {
        font-size: 2rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.8rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .btn {
        padding: 0.8rem 1.5rem;
    }
    
    .btn-large {
        padding: 1rem 2rem;
    }
    
    .visual-card {
        padding: 1.5rem;
    }
    
    .service-card,
    .work-card {
        padding: 1.5rem;
    }
}

/* スムーススクロール */
html {
    scroll-behavior: smooth;
}

/* アニメーション */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeInUp 0.6s ease-out;
}