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

:root {
    /* カラーパレット - ビジネスライク */
    --primary-color: #1a365d;
    --secondary-color: #2c5282;
    --accent-color: #0066cc;
    --text-dark: #1a202c;
    --text-gray: #4a5568;
    --text-light: #718096;
    --bg-light: #f7fafc;
    --bg-white: #ffffff;
    --border-color: #e2e8f0;
    --success-color: #48bb78;
    --error-color: #f56565;
    
    /* タイポグラフィ */
    --font-primary: 'Noto Sans JP', sans-serif;
    --font-secondary: 'Roboto', sans-serif;
    
    /* スペーシング */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* トランジション */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* シャドウ */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.15);
    --shadow-xl: 0 20px 50px rgba(0,0,0,0.2);
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ==========================================
   ヘッダー
   ========================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition-normal);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

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

.logo h1 {
    font-size: 1.4rem;
    font-weight: 900;
    color: var(--primary-color);
    letter-spacing: -0.02em;
    margin-bottom: 0.2rem;
}

.logo-sub {
    font-size: 0.75rem;
    color: var(--text-light);
    font-family: var(--font-secondary);
    font-weight: 400;
    letter-spacing: 0.05em;
}

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

.nav-link {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    transition: var(--transition-fast);
    padding: 0.5rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent-color);
    transition: var(--transition-normal);
}

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

.nav-link:hover::after {
    width: 100%;
}

.cta-button {
    background-color: var(--accent-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.cta-button:hover {
    background-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.cta-button i {
    margin-right: 0.5rem;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--primary-color);
    transition: var(--transition-normal);
    border-radius: 2px;
}

/* ==========================================
   ヒーローセクション
   ========================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1a365d 0%, #2c5282 50%, #2b6cb0 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(255,255,255,0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255,255,255,0.05) 0%, transparent 50%);
}

.hero-overlay {
    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 1200 600"><defs><pattern id="grid" width="40" height="40" patternUnits="userSpaceOnUse"><path d="M 40 0 L 0 0 0 40" fill="none" stroke="rgba(255,255,255,0.03)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
    opacity: 0.5;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
    max-width: 900px;
    padding: var(--spacing-xl) var(--spacing-md);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.2rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
    color: rgba(255, 255, 255, 0.95);
    font-weight: 400;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition-normal);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

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

.btn-primary:hover {
    background-color: var(--accent-color);
    color: white;
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

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

.btn-secondary:hover {
    background-color: white;
    color: var(--primary-color);
    transform: translateY(-3px);
}

.scroll-indicator {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    animation: bounce 2s infinite;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, rgba(255,255,255,0.7), transparent);
    margin-top: 0.5rem;
}

/* ==========================================
   セクション共通スタイル
   ========================================== */
section {
    padding: var(--spacing-xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
    letter-spacing: -0.02em;
}

.section-title.white {
    color: white;
}

.section-subtitle {
    font-size: 0.9rem;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    font-family: var(--font-secondary);
    font-weight: 500;
}

.section-subtitle.white {
    color: rgba(255, 255, 255, 0.8);
}

.title-line {
    width: 60px;
    height: 4px;
    background: linear-gradient(to right, var(--accent-color), var(--secondary-color));
    margin: var(--spacing-sm) auto;
    border-radius: 2px;
}

.title-line.white {
    background: linear-gradient(to right, white, rgba(255,255,255,0.7));
}

/* ==========================================
   事業紹介セクション
   ========================================== */
.services {
    background-color: var(--bg-light);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-md);
}

.service-card {
    background-color: white;
    padding: var(--spacing-lg);
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    border: 1px solid var(--border-color);
}

.service-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-8px);
    border-color: var(--accent-color);
}

.service-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--accent-color), var(--secondary-color));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-md);
}

.service-icon i {
    font-size: 2.5rem;
    color: white;
}

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

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

.service-features {
    list-style: none;
}

.service-features li {
    padding: 0.5rem 0;
    color: var(--text-gray);
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.service-features i {
    color: var(--success-color);
    margin-top: 0.3rem;
    flex-shrink: 0;
}

/* ==========================================
   強み・特徴セクション
   ========================================== */
.strengths {
    background-color: white;
}

.strengths-grid {
    display: grid;
    gap: var(--spacing-md);
}

.strength-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--bg-light);
    border-radius: 12px;
    border-left: 4px solid var(--accent-color);
    transition: var(--transition-normal);
}

.strength-item:hover {
    background-color: white;
    box-shadow: var(--shadow-md);
    transform: translateX(8px);
}

.strength-number {
    font-size: 3rem;
    font-weight: 900;
    color: var(--accent-color);
    font-family: var(--font-secondary);
    line-height: 1;
    opacity: 0.3;
    min-width: 80px;
}

.strength-content {
    flex: 1;
}

.strength-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.strength-description {
    color: var(--text-gray);
    line-height: 1.8;
}

/* ==========================================
   会社概要セクション
   ========================================== */
.company {
    background-color: var(--bg-light);
}

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

.company-table table {
    width: 100%;
    background-color: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.company-table th,
.company-table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.company-table th {
    background-color: var(--primary-color);
    color: white;
    font-weight: 700;
    width: 200px;
    vertical-align: top;
}

.company-table td {
    color: var(--text-gray);
    line-height: 1.8;
}

.company-table tr:last-child th,
.company-table tr:last-child td {
    border-bottom: none;
}

.company-table ul {
    list-style: none;
    padding: 0;
}

.company-table li {
    padding: 0.25rem 0;
}

.company-table li::before {
    content: '・';
    color: var(--accent-color);
    font-weight: bold;
    margin-right: 0.5rem;
}

/* ==========================================
   お問い合わせセクション
   ========================================== */
.contact-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
}

.contact-text {
    text-align: center;
    font-size: 1.1rem;
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.contact-info {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background-color: rgba(255, 255, 255, 0.1);
    padding: var(--spacing-md);
    border-radius: 12px;
    backdrop-filter: blur(10px);
    min-width: 300px;
}

.contact-item i {
    font-size: 2rem;
    color: white;
}

.contact-item h4 {
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
    opacity: 0.9;
}

.contact-item a {
    color: white;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition-fast);
}

.contact-item a:hover {
    opacity: 0.8;
}

.contact-section .btn-primary.large {
    font-size: 1.2rem;
    padding: 1.25rem 3rem;
    margin: var(--spacing-md) auto 0;
    display: flex;
    width: fit-content;
}

/* ==========================================
   フッター
   ========================================== */
.footer {
    background-color: var(--text-dark);
    color: white;
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo h3 {
    font-size: 1.3rem;
    margin-bottom: 0.25rem;
}

.footer-logo p {
    font-size: 0.8rem;
    opacity: 0.7;
    font-family: var(--font-secondary);
}

.footer-info {
    text-align: right;
}

.footer-info p {
    font-size: 0.9rem;
    opacity: 0.8;
    margin: 0.25rem 0;
}

.footer-bottom {
    text-align: center;
}

.footer-bottom p {
    font-size: 0.85rem;
    opacity: 0.7;
}

/* ==========================================
   モーダル
   ========================================== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    animation: fadeIn 0.3s ease;
}

.modal-content {
    position: relative;
    background-color: white;
    border-radius: 20px;
    padding: var(--spacing-lg);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: slideUp 0.3s ease;
}

.modal-close {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-light);
    transition: var(--transition-fast);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.modal-close:hover {
    background-color: var(--bg-light);
    color: var(--text-dark);
}

.modal-title {
    font-size: 2rem;
    font-weight: 900;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
    padding-right: 3rem;
}

.modal-subtitle {
    color: var(--text-gray);
    margin-bottom: var(--spacing-lg);
}

/* ==========================================
   フォーム
   ========================================== */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 600;
    color: var(--text-dark);
    font-size: 0.95rem;
}

.form-group label.required::after {
    content: ' *';
    color: var(--error-color);
}

.form-group input,
.form-group textarea {
    padding: 0.875rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: var(--font-primary);
    transition: var(--transition-fast);
    background-color: var(--bg-light);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    background-color: white;
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.form-group input.error,
.form-group textarea.error {
    border-color: var(--error-color);
    background-color: #fff5f5;
}

.error-message {
    color: var(--error-color);
    font-size: 0.85rem;
    display: none;
}

.error-message.show {
    display: block;
}

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

.btn.full-width {
    width: 100%;
    justify-content: center;
    margin-top: var(--spacing-sm);
}

/* ==========================================
   アニメーション
   ========================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.fade-in {
    animation: fadeIn 1s ease forwards;
}

.fade-in-delay {
    opacity: 0;
    animation: fadeIn 1s ease 0.3s forwards;
}

.fade-in-delay-2 {
    opacity: 0;
    animation: fadeIn 1s ease 0.6s forwards;
}

.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.fade-up-delay {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease 0.2s, transform 0.6s ease 0.2s;
}

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

.fade-up-delay-2 {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease 0.4s, transform 0.6s ease 0.4s;
}

.fade-up-delay-2.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-in-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.fade-in-right {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ==========================================
   レスポンシブデザイン
   ========================================== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 3rem;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    .nav {
        position: fixed;
        top: 0;
        left: -100%;
        width: 80%;
        height: 100vh;
        background-color: white;
        box-shadow: var(--shadow-xl);
        transition: var(--transition-normal);
        z-index: 999;
        padding-top: 5rem;
    }
    
    .nav.active {
        left: 0;
    }
    
    .nav-list {
        flex-direction: column;
        gap: 0;
    }
    
    .nav-link {
        display: block;
        padding: var(--spacing-sm) var(--spacing-md);
        border-bottom: 1px solid var(--border-color);
    }
    
    .cta-button {
        display: none;
    }
    
    .hamburger {
        display: flex;
        z-index: 1001;
    }
    
    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }
    
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .strength-item {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .strength-number {
        font-size: 2rem;
    }
    
    .company-table th {
        width: 120px;
        font-size: 0.9rem;
    }
    
    .contact-info {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .contact-item {
        min-width: auto;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-md);
    }
    
    .footer-info {
        text-align: center;
    }
    
    .modal-content {
        padding: var(--spacing-md);
        width: 95%;
    }
}

@media (max-width: 480px) {
    .logo h1 {
        font-size: 1.1rem;
    }
    
    .logo-sub {
        font-size: 0.65rem;
    }
    
    .hero-title {
        font-size: 1.8rem;
    }
    
    .service-card {
        padding: var(--spacing-md);
    }
    
    .company-table th,
    .company-table td {
        padding: var(--spacing-sm);
        display: block;
        width: 100%;
    }
    
    .company-table th {
        background-color: var(--bg-light);
        color: var(--primary-color);
        border-bottom: none;
        padding-bottom: 0.5rem;
    }
    
    .company-table td {
        padding-top: 0.5rem;
    }
}

/* ==========================================
   印刷スタイル
   ========================================== */
@media print {
    .header,
    .hamburger,
    .scroll-indicator,
    .modal,
    .cta-button,
    .btn {
        display: none !important;
    }
    
    section {
        page-break-inside: avoid;
    }
}