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

body {
    font-family: 'Noto Sans JP', -apple-system, 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', 'メイリオ', sans-serif;
    line-height: 1.8;
    color: #2c3e50;
    overflow-x: hidden;
    letter-spacing: 0.05em;
}

/* ヘッダー */
header {
    position: fixed;
    top: 0;
    width: 100%;
    background: #ffffff;
    box-shadow: 0 1px 4px rgba(0,0,0,0.08);
    z-index: 1000;
    transition: all 0.3s ease;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 0;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    height: 60px;
    display: flex;
    align-items: center;
}

.logo img {
    height: 100%;
    width: auto;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: #5a6c7d;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: #1a4d8f;
}

.cta-button {
    background: #1a4d8f;
    color: white !important;
    padding: 0.8rem 2rem;
    border-radius: 4px;
    text-decoration: none;
    transition: all 0.3s ease;
    font-weight: 500;
    font-size: 0.95rem;
}

.cta-button:hover {
    background: #2a5d9f;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(26, 77, 143, 0.2);
}

/* ヒーローセクション */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: #f8f9fa;
    padding: 5rem 5%;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: -20%;
    width: 60%;
    height: 100%;
    background: linear-gradient(135deg, #e8f0fe 0%, #f0f4f8 100%);
    transform: skewX(-15deg);
    z-index: 0;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    z-index: 1;
    position: relative;
}

.hero-text h1 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: #1a4d8f;
    font-weight: 700;
    line-height: 1.4;
    animation: fadeInUp 0.8s ease;
}

.hero-text p {
    font-size: 1.1rem;
    color: #5a6c7d;
    margin-bottom: 2rem;
    line-height: 1.8;
    animation: fadeInUp 0.8s ease 0.2s backwards;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    animation: fadeInUp 0.8s ease 0.4s backwards;
}

.secondary-button {
    background: white;
    color: #1a4d8f;
    padding: 0.8rem 2rem;
    border-radius: 4px;
    text-decoration: none;
    transition: all 0.3s ease;
    border: 2px solid #1a4d8f;
    font-weight: 500;
    font-size: 0.95rem;
}

.secondary-button:hover {
    background: #1a4d8f;
    color: white;
}

.hero-visual {
    position: relative;
    gap: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.hero-visual {
    position: relative;
    animation: float 6s ease-in-out infinite;
}

.chat-demo {
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    padding: 2rem;
    position: relative;
    overflow: hidden;
    max-width: 550px;
    border: 1px solid #e9ecef;
}

.chat-message {
    background: #f8f9fa;
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
    font-size: 0.95rem;
    color: #2c3e50;
    border-left: 3px solid #1a4d8f;
}

.chat-response {
    background: #e8f0fe;
    padding: 1rem;
    border-radius: 4px;
    font-size: 0.95rem;
    color: #2c3e50;
    line-height: 1.8;
}

.highlight-brand {
    background: #ffd43b;
    padding: 2px 6px;
    border-radius: 2px;
    font-weight: 600;
    color: #2c3e50;
}

/* 課題セクション */
.problem {
    padding: 5rem 5%;
    background: white;
}

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

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.2rem;
    margin-bottom: 1rem;
    color: #1a4d8f;
    font-weight: 700;
}

.section-header p {
    font-size: 1.05rem;
    color: #5a6c7d;
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 3rem;
    margin-bottom: 4rem;
}

.problem-card {
    text-align: center;
    padding: 2rem;
}

.problem-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    background: #e8f0fe;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    margin: 0 auto 1.5rem;
}

.problem-card h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: #1a4d8f;
    font-weight: 600;
}

.problem-card p {
    color: #5a6c7d;
    line-height: 1.8;
    font-size: 0.95rem;
}

.impact-stats {
    background: #ffffff;
    padding: 3rem;
    border-radius: 8px;
    text-align: center;
    margin-top: 3rem;
    border: 1px solid #e9ecef;
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
}

.impact-stats h3 {
    font-size: 1.5rem;
    color: #1a4d8f;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

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

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: #1a4d8f;
}

.stat-label {
    color: #5a6c7d;
    margin-top: 0.5rem;
    font-size: 0.95rem;
}

/* ソリューションセクション */
.solution {
    padding: 5rem 5%;
    background: #ffffff;
    border-top: 1px solid #e9ecef;
    border-bottom: 1px solid #e9ecef;
}

.solution-content {
    max-width: 1200px;
    margin: 0 auto;
}

.solution-visual {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    margin-top: 3rem;
}

.solution-text h3 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: #1a4d8f;
    font-weight: 600;
}

.solution-list {
    list-style: none;
}

.solution-list li {
    padding: 1.2rem 0;
    border-bottom: 1px solid #e9ecef;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.solution-list li:last-child {
    border-bottom: none;
}

.solution-icon {
    font-size: 1.3rem;
    color: #1a4d8f;
    flex-shrink: 0;
    background: #e8f0fe;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
}

.solution-demo {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    border: 1px solid #e9ecef;
}

.demo-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #e9ecef;
}

.demo-title {
    font-weight: 600;
    color: #1a4d8f;
    font-size: 1.1rem;
}

.demo-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #28a745;
    font-size: 0.9rem;
}

.alert-item {
    background: #fff8e1;
    border-left: 3px solid #ff9800;
    padding: 1rem;
    margin-bottom: 1rem;
    border-radius: 4px;
}

.alert-time {
    font-size: 0.85rem;
    color: #6c757d;
    margin-bottom: 0.5rem;
}

.alert-content {
    font-size: 0.95rem;
    color: #2c3e50;
    line-height: 1.6;
}

/* 特徴セクション */
.features {
    padding: 5rem 5%;
    background: white;
}

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

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

.feature-card {
    background: #ffffff;
    padding: 2rem;
    border-radius: 8px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    border: 1px solid #e9ecef;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: #1a4d8f;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
}

.feature-card:hover::before {
    transform: translateX(0);
}

.feature-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
    border-color: #1a4d8f;
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    background: #e8f0fe;
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #1a4d8f;
    font-weight: 600;
}

.feature-card p {
    color: #5a6c7d;
    font-size: 0.95rem;
    line-height: 1.8;
}

/* 対応LLMセクション */
.llm-support {
    padding: 5rem 5%;
    background: #f8f9fa;
}

.llm-content {
    max-width: 1200px;
    margin: 0 auto;
}

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

.llm-category {
    background: white;
    padding: 2.5rem;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    border: 1px solid #e9ecef;
}

.llm-category h3 {
    font-size: 1.5rem;
    color: #1a4d8f;
    margin-bottom: 1.5rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.llm-list {
    display: grid;
    gap: 1rem;
}

.llm-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.llm-item:hover {
    background: #e8f0fe;
    transform: translateX(5px);
}

.llm-logo {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.llm-info h4 {
    font-size: 1.1rem;
    color: #2c3e50;
    margin-bottom: 0.2rem;
    font-weight: 600;
}

.llm-info p {
    font-size: 0.85rem;
    color: #6c757d;
}

/* 比較セクション */
.comparison {
    padding: 5rem 5%;
    background: white;
}

.comparison-table {
    max-width: 1000px;
    margin: 0 auto;
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    border: 1px solid #e9ecef;
    overflow-x: auto;
}

.table-wrapper {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px;
}

th, td {
    padding: 1.5rem 1rem;
    text-align: center;
    border-bottom: 1px solid #e9ecef;
    white-space: nowrap;
}

th {
    background: #1a4d8f;
    color: white;
    font-weight: 600;
    font-size: 0.95rem;
    position: sticky;
    top: 0;
}

th:first-child, td:first-child {
    text-align: left;
    position: sticky;
    left: 0;
    background: white;
    z-index: 1;
}

th:first-child {
    background: #1a4d8f;
}

td {
    font-size: 0.95rem;
    color: #2c3e50;
}

.check {
    color: #28a745;
    font-size: 1.3rem;
}

.partial {
    color: #ff9800;
    font-size: 1.3rem;
}

.cross {
    color: #dc3545;
    font-size: 1.3rem;
}

.highlight {
    background: #e8f0fe;
    font-weight: 600;
}

.brand-analytics-column {
    background: #f0f7ff;
    color: #1a4d8f;
    font-weight: 600;
}

/* 今後の機能セクション */
.future-features {
    padding: 5rem 5%;
    background: #f8f9fa;
}

.future-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.future-card {
    background: white;
    padding: 2.5rem;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    border: 1px solid #e9ecef;
    transition: all 0.3s ease;
}

.future-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.12);
}

.future-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    background: #e8f0fe;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
}

.future-card h3 {
    font-size: 1.4rem;
    color: #1a4d8f;
    margin-bottom: 1rem;
    font-weight: 600;
}

.future-card p {
    color: #5a6c7d;
    line-height: 1.8;
    font-size: 0.95rem;
}

.coming-soon {
    display: inline-block;
    background: #ff9800;
    color: white;
    padding: 0.2rem 0.8rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-top: 1rem;
}

/* 価格セクション */
.pricing {
    padding: 5rem 5%;
    background: white;
}

.pricing-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-card {
    background: white;
    border: 1px solid #e9ecef;
    border-radius: 8px;
    padding: 2.5rem 2rem;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
}

.pricing-card.featured {
    border-color: #1a4d8f;
    border-width: 2px;
    transform: scale(1.03);
    box-shadow: 0 8px 24px rgba(26, 77, 143, 0.15);
}

.pricing-card.featured::before {
    content: '人気プラン';
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: #1a4d8f;
    color: white;
    padding: 0.3rem 1.5rem;
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 600;
}

.pricing-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    color: #1a4d8f;
    font-weight: 600;
}

.pricing-features {
    list-style: none;
    margin: 2rem 0;
    text-align: left;
}

.pricing-features li {
    padding: 0.6rem 0;
    color: #5a6c7d;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
}

.pricing-features li::before {
    content: '✓';
    color: #28a745;
    font-weight: bold;
    margin-right: 0.8rem;
}

.contact-button {
    background: #1a4d8f;
    color: white;
    padding: 0.8rem 2rem;
    border-radius: 4px;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s ease;
    font-weight: 600;
    font-size: 0.95rem;
    margin-top: 1rem;
}

.contact-button:hover {
    background: #2a5d9f;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(26, 77, 143, 0.2);
}

/* FAQ セクション */
.faq {
    padding: 5rem 5%;
    background: #f8f9fa;
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    border-radius: 8px;
    margin-bottom: 1rem;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    border: 1px solid #e9ecef;
    transition: all 0.3s ease;
}

.faq-item:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.faq-question {
    padding: 1.5rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
    color: #2c3e50;
    font-size: 1.05rem;
}

.faq-question:hover {
    color: #1a4d8f;
}

.faq-icon {
    font-size: 1.3rem;
    transition: transform 0.3s ease;
    color: #1a4d8f;
}

.faq-answer {
    padding: 0 1.5rem;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item.active .faq-answer {
    padding: 0 1.5rem 1.5rem;
    max-height: 500px;
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer p {
    color: #5a6c7d;
    line-height: 1.8;
    font-size: 0.95rem;
}

.faq-example {
    background: #f8f9fa;
    padding: 1rem;
    border-radius: 4px;
    margin-top: 1rem;
    font-size: 0.9rem;
    border-left: 3px solid #1a4d8f;
    color: #2c3e50;
}

/* CTA セクション */
.cta-section {
    padding: 5rem 5%;
    background: #1a4d8f;
    text-align: center;
    color: white;
}

.cta-section h2 {
    font-size: 2.2rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.cta-section p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.cta-button-white {
    background: white;
    color: #1a4d8f;
    padding: 1rem 3rem;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
    font-size: 1rem;
}

.cta-button-white:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.2);
}

/* フッター */
footer {
    background: #2c3e50;
    color: white;
    padding: 3rem 5%;
    text-align: center;
}

footer p {
    opacity: 0.9;
    font-size: 0.9rem;
}

/* ハンバーガーメニュー */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 20px;
    cursor: pointer;
    z-index: 1001;
}

.hamburger span {
    display: block;
    height: 3px;
    width: 100%;
    background-color: #1a4d8f;
    border-radius: 3px;
    transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}

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

.hamburger.active span:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
}

/* モバイルメニュー */
.mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 300px;
    height: 100vh;
    background: white;
    box-shadow: -2px 0 10px rgba(0,0,0,0.1);
    transition: right 0.3s ease;
    z-index: 999;
    padding: 80px 2rem 2rem;
}

.mobile-menu.active {
    right: 0;
}

.mobile-menu a {
    display: block;
    padding: 1rem 0;
    text-decoration: none;
    color: #2c3e50;
    font-size: 1.1rem;
    border-bottom: 1px solid #e9ecef;
    transition: color 0.3s ease;
}

.mobile-menu a:hover {
    color: #1a4d8f;
}

.mobile-menu .cta-button {
    margin-top: 2rem;
    display: block;
    text-align: center;
}

/* オーバーレイ */
.menu-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 998;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.menu-overlay.active {
    display: block;
    opacity: 1;
}

/* 固定フッター */
.fixed-footer {
    position: fixed;
    bottom: -100px;
    left: 0;
    width: 100%;
    background: white;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
    padding: 1rem;
    z-index: 900;
    transition: bottom 0.3s ease;
    display: none;
}

.fixed-footer.show {
    bottom: 0;
}

.fixed-footer-content {
    display: flex;
    gap: 1rem;
    max-width: 500px;
    margin: 0 auto;
}

.fixed-footer-btn {
    flex: 1;
    padding: 0.8rem 1rem;
    border-radius: 4px;
    text-decoration: none;
    text-align: center;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.fixed-footer-btn.primary {
    background: #1a4d8f;
    color: white;
}

.fixed-footer-btn.primary:hover {
    background: #2a5d9f;
}

.fixed-footer-btn.secondary {
    background: white;
    color: #1a4d8f;
    border: 2px solid #1a4d8f;
}

.fixed-footer-btn.secondary:hover {
    background: #1a4d8f;
    color: white;
}

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

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

/* レスポンシブ */
@media (max-width: 768px) {
    nav {
        padding: 0.5rem 5%;
    }
    
    .mobile-menu {
        display: block;
    }

    .hamburger {
        display: flex;
    }
    
    .fixed-footer {
        display: block;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-text h1 {
        font-size: 2rem;
    }
    
    .hero-buttons {
        justify-content: center;
        flex-direction: column;
        width: 100%;
    }
    
    .hero-buttons a {
        width: 100%;
        text-align: center;
    }
    
    .nav-links {
        display: none;
    }
    
    .pricing-card.featured {
        transform: scale(1);
    }
    
    .solution-visual {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .problem-grid {
        grid-template-columns: 1fr;
    }
    
    .llm-grid {
        grid-template-columns: 1fr;
    }
    
    .future-grid {
        grid-template-columns: 1fr;
    }
    
    table {
        font-size: 0.85rem;
    }
    
    th, td {
        padding: 1rem 0.5rem;
    }
}