:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --accent-color: #ff6b6b;
    --text-dark: #2c3e50;
    --text-light: #7f8c8d;
    --bg-light: #f8f9fa;
    --white: #ffffff;
    --shadow: 0 10px 30px rgba(0,0,0,0.1);
    --shadow-hover: 0 20px 40px rgba(0,0,0,0.15);
    --border-radius: 20px;
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--white);
    overflow-x: hidden;
}

/* スクロールバーカスタマイズ */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-gradient);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-color);
}

/* パーティクル背景 */
.particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: rgba(102, 126, 234, 0.3);
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}

/* ヘッダー */
header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    color: var(--text-dark);
    padding: 1rem 0;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
    transition: var(--transition);
}

header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 4px 30px rgba(0,0,0,0.15);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    text-decoration: none;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: var(--transition);
}

.logo:hover {
    transform: scale(1.05);
}

nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

nav a {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    transition: var(--transition);
}

nav a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-gradient);
    transition: var(--transition);
}

nav a:hover::after {
    width: 100%;
}

/* ハンバーガーメニュー */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    border-radius: 3px;
    transition: var(--transition);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* メインビジュアル */
.hero {
    background: var(--primary-gradient);
    color: white;
    padding: 10rem 0 8rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    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"><polygon fill="%23ffffff" fill-opacity="0.05" points="0,1000 1000,0 1000,1000"/></svg>');
    background-size: cover;
    animation: float 10s ease-in-out infinite;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    font-weight: 700;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
    animation: slideUp 1s ease-out;
}

.hero .subtitle {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    animation: slideUp 1s ease-out 0.2s both;
}

.hero .description {
    font-size: 1.2rem;
    margin-bottom: 3rem;
    opacity: 0.8;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    animation: slideUp 1s ease-out 0.4s both;
}

.cta-button {
    display: inline-block;
    background: var(--accent-color);
    color: white;
    padding: 1.2rem 3rem;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition);
    box-shadow: 0 8px 25px rgba(255,107,107,0.4);
    position: relative;
    overflow: hidden;
    animation: slideUp 1s ease-out 0.6s both;
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s;
}

.cta-button:hover::before {
    left: 100%;
}

.cta-button:hover {
    background: #ff5252;
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(255,107,107,0.5);
}

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

/* セクション共通 */
.section {
    padding: 6rem 0;
    position: relative;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-title {
    text-align: center;
    font-size: 3rem;
    margin-bottom: 4rem;
    color: var(--text-dark);
    position: relative;
    font-weight: 700;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--primary-gradient);
    border-radius: 2px;
}

/* 統計セクション */
.stats {
    background: var(--text-dark);
    color: white;
    padding: 4rem 0;
    position: relative;
    overflow: hidden;
}

.stats::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(255,255,255,0.05) 50%, transparent 70%);
    animation: shine 3s ease-in-out infinite;
}

@keyframes shine {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    text-align: center;
}

.stat-item {
    padding: 2rem;
    position: relative;
    z-index: 1;
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 1rem;
    display: block;
}

.stat-label {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* サービス紹介 */
.services {
    background: var(--bg-light);
    position: relative;
}

.services::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(102, 126, 234, 0.05) 0%, transparent 50%);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
    position: relative;
    z-index: 1;
}

.service-card {
    background: white;
    padding: 3rem 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transition: var(--transition);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.service-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto 2rem;
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: white;
    transition: var(--transition);
}

.service-card:hover .service-icon {
    transform: scale(1.1) rotate(5deg);
}

.service-card h3 {
    font-size: 1.6rem;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
    font-weight: 600;
}

.service-card p {
    color: var(--text-light);
    line-height: 1.8;
    font-size: 1rem;
}

/* 実績セクション */
.achievements {
    background: white;
    padding: 6rem 0;
}

.achievements-slider {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    overflow: hidden;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.achievement-slide {
    display: none;
    padding: 3rem;
    text-align: center;
    background: var(--bg-light);
}

.achievement-slide.active {
    display: block;
    animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.achievement-slide h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.achievement-slide p {
    color: var(--text-light);
    font-size: 1.1rem;
    line-height: 1.8;
}

.slider-controls {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
}

.slider-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #ddd;
    cursor: pointer;
    transition: var(--transition);
}

.slider-dot.active {
    background: var(--accent-color);
    transform: scale(1.2);
}

/* 特徴 */
.features {
    background: var(--bg-light);
    position: relative;
}

.features::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    top: 0;
    background: radial-gradient(circle at 80% 20%, rgba(245, 87, 108, 0.05) 0%, transparent 50%);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
    position: relative;
    z-index: 1;
}

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

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

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: var(--accent-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
    transition: var(--transition);
}

.feature-item:hover .feature-icon {
    transform: scale(1.1);
    background: var(--primary-gradient);
}

.feature-item h4 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
    font-weight: 600;
}

.feature-item p {
    color: var(--text-light);
    line-height: 1.7;
}

/* 代表メッセージ */
.message {
    background: var(--secondary-gradient);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.message::before {
    content: '';
    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"><circle fill="%23ffffff" fill-opacity="0.03" cx="200" cy="200" r="100"/><circle fill="%23ffffff" fill-opacity="0.03" cx="800" cy="800" r="150"/></svg>');
    background-size: 500px;
    animation: float 15s ease-in-out infinite;
}

.message-content {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.message h2 {
    font-size: 3rem;
    margin-bottom: 3rem;
    font-weight: 700;
}

.message .quote {
    font-size: 1.4rem;
    margin-bottom: 3rem;
    font-style: italic;
    line-height: 1.8;
    position: relative;
}

.message .quote::before,
.message .quote::after {
    content: '"';
    font-size: 4rem;
    color: rgba(255,255,255,0.3);
    position: absolute;
    font-family: serif;
}

.message .quote::before {
    top: -20px;
    left: -30px;
}

.message .quote::after {
    bottom: -40px;
    right: -30px;
}

.message .author {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.message .author-title {
    font-size: 1rem;
    opacity: 0.9;
}

/* 会社概要 */
.company-info {
    background: var(--bg-light);
    position: relative;
}

.company-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 4rem;
}

.company-details {
    background: white;
    padding: 3rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.company-details h3 {
    font-size: 1.8rem;
    margin-bottom: 2rem;
    color: var(--text-dark);
    font-weight: 600;
}

.company-table {
    width: 100%;
    border-collapse: collapse;
}

.company-table tr {
    border-bottom: 1px solid #eee;
}

.company-table td {
    padding: 1rem 0;
    vertical-align: top;
}

.company-table td:first-child {
    font-weight: 600;
    color: var(--text-light);
    width: 120px;
}

.company-table td:last-child {
    color: var(--text-dark);
}

/* お問い合わせフォーム */
.contact {
    background: var(--text-dark);
    color: white;
    position: relative;
    overflow: hidden;
}

.contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(245, 87, 108, 0.1) 100%);
}

.contact-content {
    position: relative;
    z-index: 1;
}

.contact h2 {
    color: white;
    margin-bottom: 2rem;
    text-align: center;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-top: 4rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: rgba(255,255,255,0.1);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.contact-item:hover {
    background: rgba(255,255,255,0.15);
    transform: translateX(10px);
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--accent-color);
    width: 30px;
}

.contact-item div h4 {
    margin-bottom: 0.5rem;
    color: var(--accent-color);
    font-weight: 600;
}

.contact-item div p {
    font-size: 1.1rem;
    margin: 0;
}

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

.contact-item a:hover {
    color: var(--accent-color);
}

.contact-form {
    background: rgba(255,255,255,0.1);
    padding: 2rem;
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: white;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid rgba(255,255,255,0.2);
    border-radius: 10px;
    background: rgba(255,255,255,0.1);
    color: white;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    background: rgba(255,255,255,0.15);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: rgba(255,255,255,0.6);
}

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

.submit-btn {
    width: 100%;
    padding: 1rem;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.submit-btn:hover {
    background: #ff5252;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(255,107,107,0.4);
}

/* フッター */
footer {
    background: #1a1a1a;
    color: white;
    text-align: center;
    padding: 3rem 0;
    position: relative;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
}

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

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

.social-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    color: white;
    text-decoration: none;
    transition: var(--transition);
}

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

/* レスポンシブ */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    nav {
        position: fixed;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        box-shadow: 0 4px 20px rgba(0,0,0,0.1);
        transition: var(--transition);
    }

    nav.active {
        top: 70px;
    }

    nav ul {
        flex-direction: column;
        padding: 2rem;
        gap: 1rem;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

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

    .section-title {
        font-size: 2rem;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .company-grid {
        grid-template-columns: 1fr;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .footer-links {
        flex-direction: column;
        gap: 1rem;
    }
}

/* アニメーション */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.slide-in-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.slide-in-right {
    opacity: 0;
    transform: translateX(50px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

/* ローディング画面 */
.loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--primary-gradient);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease-out;
}

.loader.hidden {
    opacity: 0;
    pointer-events: none;
}

.loader-content {
    text-align: center;
    color: white;
}

.loader-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid rgba(255,255,255,0.3);
    border-top: 3px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}