/* ========================================
   リセットと基本設定
======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* カラーパレット */
    --primary-color: #0ea5e9;
    --primary-dark: #0284c7;
    --secondary-color: #06b6d4;
    --accent-color: #3b82f6;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* フォント */
    --font-primary: 'Noto Sans JP', sans-serif;
    --font-secondary: 'Inter', sans-serif;
    
    /* スペーシング */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* トランジション */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
}

html {
    scroll-behavior: smooth;
}

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

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

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

/* ========================================
   コンテナとユーティリティ
======================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, #0ea5e9, #06b6d4);
    margin: var(--spacing-md) auto 0;
    border-radius: 4px;
    box-shadow: 0 2px 4px rgba(14, 165, 233, 0.3);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

/* ========================================
   ヘッダー
======================================== */
.header {
    background: var(--bg-white);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all var(--transition-normal);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.logo-sub {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-family: var(--font-secondary);
    letter-spacing: 0.05em;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-link {
    font-weight: 500;
    color: var(--text-primary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 6px;
    transition: all var(--transition-normal);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
    background-color: rgba(14, 165, 233, 0.1);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--primary-color);
    border-radius: 2px;
    transition: all var(--transition-normal);
}

/* ========================================
   ヒーローセクション
======================================== */
.hero {
    position: relative;
    min-height: 600px;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #0ea5e9 0%, #06b6d4 100%);
    color: var(--bg-white);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('https://sspark.genspark.ai/cfimages?u1=GXC2GKe5WOljf2iJSyy8SxFIVpCx50daI1PS6goRLuq0FrQC2aGodJXTCJv2sMXrDjOKnHdPCTxWYHKJRYDkJ4fnCNSAh1H3hmLjFVQbKL3oHxMU4Gq8tir1UHgrdYGNKT87axA9111qcOen6aop9ltxsz%2F7FYCI3Y9jzePAf3ETZiauqUemL6MuE272S2hcGW8vEDTgdN4zzQlufBQuH7%2FckjX85cdhCo4%3D&u2=wfz7q3uQkTqUIHMV&width=2560');
    background-size: cover;
    background-position: center right;
    opacity: 0.3;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.7) 0%, rgba(6, 182, 212, 0.7) 100%);
}

.hero-content {
    position: relative;
    z-index: 1;
    padding: var(--spacing-3xl) 0;
    max-width: 800px;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: var(--spacing-md);
    color: #fbbf24;
    letter-spacing: 0.05em;
}

.hero-description {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
    opacity: 0.95;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* ========================================
   ボタン
======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.875rem 1.75rem;
    border-radius: 10px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all var(--transition-normal);
    text-align: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background-color: var(--bg-white);
    color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.btn-primary > * {
    position: relative;
    z-index: 1;
}

.btn-primary:hover {
    background-color: var(--primary-color);
    color: var(--bg-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary > * {
    position: relative;
    z-index: 1;
}

.btn-secondary:hover {
    background-color: var(--bg-white);
    color: var(--primary-color);
    transform: translateY(-2px);
}

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

.btn-outline > * {
    position: relative;
    z-index: 1;
}

.btn-outline:hover {
    background-color: var(--primary-color);
    color: var(--bg-white);
    transform: translateY(-2px);
}

.btn-large {
    padding: 1.125rem 2.5rem;
    font-size: 1.125rem;
}

/* ========================================
   特徴セクション
======================================== */
.features {
    padding: var(--spacing-3xl) 0;
    background-color: var(--bg-white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.feature-card {
    padding: var(--spacing-xl);
    background: var(--bg-white);
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    text-align: center;
    border: 2px solid transparent;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(14, 165, 233, 0.15);
    border-color: rgba(14, 165, 233, 0.3);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--bg-white);
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.feature-description {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ========================================
   サービス紹介セクション
======================================== */
.services-intro {
    padding: var(--spacing-3xl) 0;
    background-color: var(--bg-light);
}

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

.service-card {
    background: var(--bg-white);
    border-radius: 16px;
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 2px solid transparent;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(14, 165, 233, 0.15);
    border-color: rgba(14, 165, 233, 0.3);
}

.service-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    color: var(--bg-white);
    margin-bottom: var(--spacing-md);
}

.service-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    line-height: 1.4;
}

.service-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--primary-color);
    font-weight: 600;
    transition: all var(--transition-normal);
}

.service-link:hover {
    gap: var(--spacing-sm);
    color: var(--primary-dark);
}

.services-cta {
    text-align: center;
    margin-top: var(--spacing-2xl);
}

/* ========================================
   パートナーセクション
======================================== */
.partner {
    padding: var(--spacing-3xl) 0;
    background-color: var(--bg-white);
}

.partner-content {
    max-width: 900px;
    margin: 0 auto;
}

.partner-card {
    background: linear-gradient(135deg, #0ea5e9 0%, #06b6d4 100%);
    color: var(--bg-white);
    padding: var(--spacing-2xl);
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(14, 165, 233, 0.2);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.partner-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.partner-logo {
    width: 100px;
    height: 100px;
    margin: 0 auto var(--spacing-md);
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    backdrop-filter: blur(10px);
    position: relative;
    z-index: 1;
}

.partner-name {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    position: relative;
    z-index: 1;
}

.partner-description {
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
    position: relative;
    z-index: 1;
}

.partner-info {
    background: rgba(255, 255, 255, 0.1);
    padding: var(--spacing-md);
    border-radius: 8px;
    margin-bottom: var(--spacing-lg);
    backdrop-filter: blur(10px);
    position: relative;
    z-index: 1;
}

.partner-info p {
    margin-bottom: var(--spacing-xs);
    font-size: 0.9rem;
}

.partner-info p:last-child {
    margin-bottom: 0;
}

/* ========================================
   会社情報セクション
======================================== */
.company-overview {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.03), rgba(6, 182, 212, 0.03));
}

.company-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.company-info-card {
    background: var(--bg-white);
    padding: var(--spacing-xl);
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    border: 2px solid transparent;
}

.company-info-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.company-info-card .info-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-md);
    background: linear-gradient(135deg, #0ea5e9, #06b6d4);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
}

.company-info-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.company-info-card p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.company-info-card .sub-text {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.company-info-card a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    display: block;
    margin-top: var(--spacing-xs);
}

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

.company-cta {
    text-align: center;
    margin-top: var(--spacing-xl);
}

/* ========================================
   CTAセクション
======================================== */
.cta {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, #0ea5e9, #06b6d4);
    color: var(--bg-white);
    text-align: center;
}

.cta-content {
    max-width: 800px;
    margin: 0 auto;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.cta-description {
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-xl);
    opacity: 0.95;
}

/* ========================================
   法律関連ページ
======================================== */
.legal-content {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-white);
}

.legal-text {
    max-width: 900px;
    margin: 0 auto;
    background: var(--bg-white);
    padding: var(--spacing-2xl);
    border-radius: 16px;
    box-shadow: var(--shadow-md);
}

.legal-intro {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.05), rgba(6, 182, 212, 0.05));
    border-left: 4px solid var(--primary-color);
    border-radius: 8px;
}

.legal-section {
    margin-bottom: var(--spacing-xl);
}

.legal-section h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--primary-color);
}

.legal-section p {
    font-size: 0.95rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.legal-section ul,
.legal-section ol {
    margin-left: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.legal-section li {
    font-size: 0.95rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.contact-box {
    background: var(--bg-light);
    padding: var(--spacing-lg);
    border-radius: 8px;
    margin-top: var(--spacing-md);
}

.contact-box p {
    margin-bottom: var(--spacing-sm);
    font-size: 0.95rem;
}

.contact-box a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.contact-box a:hover {
    text-decoration: underline;
}

.legal-date,
.legal-company {
    text-align: right;
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-top: var(--spacing-lg);
}

.legal-company {
    font-weight: 600;
    color: var(--text-primary);
}

.footer-legal {
    margin-top: var(--spacing-sm);
    font-size: 0.875rem;
}

.footer-legal a {
    color: #9ca3af;
    text-decoration: none;
    margin: 0 var(--spacing-xs);
}

.footer-legal a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

/* ========================================
   フロートお問い合わせボタン
======================================== */
.float-contact-btn {
    position: fixed;
    top: 50%;
    right: 20px;
    transform: translateY(-50%);
    background: linear-gradient(135deg, #0ea5e9, #06b6d4);
    color: var(--bg-white);
    padding: 12px 24px;
    border-radius: 50px;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 0.95rem;
    box-shadow: 0 4px 20px rgba(14, 165, 233, 0.4);
    transition: all var(--transition-normal);
    z-index: 1000;
    animation: float-pulse 2s ease-in-out infinite;
}

.float-contact-btn:hover {
    transform: translateY(-50%) translateX(-3px) scale(1.05);
    box-shadow: 0 6px 30px rgba(14, 165, 233, 0.6);
    background: linear-gradient(135deg, #06b6d4, #0ea5e9);
}

.float-contact-btn i {
    font-size: 1.1rem;
}

.float-contact-btn span {
    font-size: 0.9rem;
    letter-spacing: 0.5px;
}

@keyframes float-pulse {
    0%, 100% {
        box-shadow: 0 4px 20px rgba(14, 165, 233, 0.4);
    }
    50% {
        box-shadow: 0 4px 30px rgba(14, 165, 233, 0.7);
    }
}

/* ========================================
   フッター
======================================== */
.footer {
    background-color: #1f2937;
    color: #e5e7eb;
    padding: var(--spacing-3xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--bg-white);
    margin-bottom: var(--spacing-xs);
}

.footer-description {
    font-size: 0.875rem;
    color: #9ca3af;
    margin-bottom: var(--spacing-sm);
}

.footer-text {
    font-size: 0.9rem;
    line-height: 1.8;
    color: #d1d5db;
}

.footer-heading {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--bg-white);
    margin-bottom: var(--spacing-md);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    color: #d1d5db;
    transition: color var(--transition-normal);
}

.footer-links a:hover {
    color: var(--bg-white);
    padding-left: 5px;
}

.footer-contact {
    list-style: none;
}

.footer-contact li {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    color: #d1d5db;
    font-size: 0.9rem;
    line-height: 1.6;
}

.footer-contact i {
    color: var(--primary-color);
    margin-top: 3px;
    flex-shrink: 0;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: var(--spacing-md);
    text-align: center;
    color: #9ca3af;
    font-size: 0.875rem;
}

.footer-legal {
    margin-top: var(--spacing-xs);
}

/* ========================================
   レスポンシブデザイン
======================================== */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .page-title {
        font-size: 2rem;
    }
    
    .page-subtitle {
        font-size: 1rem;
    }
    
    .float-contact-btn {
        top: 50%;
        right: 15px;
        transform: translateY(-50%);
        padding: 10px 18px;
        font-size: 0.85rem;
    }
    
    .float-contact-btn span {
        font-size: 0.85rem;
    }
    
    .float-contact-btn i {
        font-size: 1rem;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .nav {
        position: fixed;
        top: 0;
        left: -100%;
        width: 80%;
        height: 100vh;
        background: var(--bg-white);
        box-shadow: var(--shadow-xl);
        padding: var(--spacing-2xl);
        transition: left var(--transition-normal);
        z-index: 9999;
    }
    
    .nav.active {
        left: 0;
    }
    
    .nav-list {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .nav-link {
        display: block;
        padding: var(--spacing-md);
        border-radius: 8px;
        font-size: 1.125rem;
    }
    
    .features-grid,
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .cta-title {
        font-size: 1.75rem;
    }
    
    .partner-name {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .float-contact-btn {
        top: 50%;
        right: 10px;
        transform: translateY(-50%);
        padding: 8px 14px;
        font-size: 0.8rem;
        gap: 6px;
    }
    
    .float-contact-btn span {
        font-size: 0.75rem;
    }
    
    .float-contact-btn i {
        font-size: 0.9rem;
    }
    
    .hero {
        min-height: 500px;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .feature-card,
    .service-card {
        padding: var(--spacing-md);
    }
    
    .partner-card {
        padding: var(--spacing-md);
    }
}