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

/* 基本設定 */
:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #10b981;
    --text-color: #1f2937;
    --text-light: #374151;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --max-width: 1200px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* ヘッダー */
.header {
    background: var(--bg-white);
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

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

.logo a {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text-color);
    text-decoration: none;
    letter-spacing: 0.05em;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-menu a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

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

.cta-nav {
    background: var(--primary-color);
    color: white !important;
    padding: 0.5rem 1.5rem;
    border-radius: 6px;
    transition: background 0.3s;
}

.cta-nav:hover {
    background: var(--primary-dark);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-color);
    transition: all 0.3s;
}

/* ヒーローセクション */
.hero {
    background-image: url('https://images.unsplash.com/photo-1551288049-bebda4e38f71?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    color: white;
    padding: 10rem 0 6rem;
    margin-top: 60px;
    text-align: center;
    position: relative;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.85) 0%, rgba(118, 75, 162, 0.85) 100%);
    z-index: 1;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: bold;
    margin-bottom: 1.5rem;
    line-height: 1.3;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    opacity: 0.95;
}

.cta-button {
    display: inline-block;
    background: var(--secondary-color);
    color: white;
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
    font-weight: bold;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.cta-button:hover {
    background: #059669;
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

/* セクション共通スタイル */
section {
    padding: 5rem 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: bold;
    text-align: center;
    margin-bottom: 2rem;
    color: var(--text-color);
}

.section-text {
    font-size: 1.25rem;
    line-height: 1.8;
    text-align: center;
    color: var(--text-light);
    max-width: 800px;
    margin: 0 auto;
}

/* 課題提起セクション */
.challenge {
    background: var(--bg-light);
}

.voice-channels {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 3rem;
    margin: 3rem 0;
    flex-wrap: wrap;
}

.channel-item {
    text-align: center;
    transition: transform 0.3s;
}

.channel-item:hover {
    transform: translateY(-5px);
}

.channel-icon {
    width: 80px;
    height: 80px;
    background: var(--bg-white);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0 auto 1rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    transition: all 0.3s;
}

.channel-item:hover .channel-icon {
    background: var(--primary-color);
    color: white;
}

.channel-icon .material-icons {
    font-size: 40px;
    color: var(--primary-color);
    transition: color 0.3s;
}

.channel-item:hover .channel-icon .material-icons {
    color: white;
}

.channel-name {
    font-weight: 600;
    color: var(--text-color);
    font-size: 0.95rem;
}

/* ソリューション紹介セクション */
.solution {
    background: var(--bg-white);
}

.dashboard-preview {
    margin-top: 3rem;
    text-align: center;
}

.dashboard-preview img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

/* サービスの流れセクション */
.flow {
    background: var(--bg-light);
}

.flow-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.flow-step {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: transform 0.3s;
}

.flow-step:hover {
    transform: translateY(-5px);
}

.step-number {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: bold;
    margin-bottom: 1rem;
}

.step-title {
    font-size: 1.25rem;
    font-weight: bold;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.step-text {
    color: var(--text-light);
    line-height: 1.7;
    font-size: 1.1rem;
}

.step-text small {
    display: block;
    margin-top: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-light);
}

/* 価値提案セクション */
.value {
    background: var(--bg-white);
}

.value-props {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.value-prop {
    padding: 2rem;
    border-left: 4px solid var(--primary-color);
    background: var(--bg-light);
    border-radius: 8px;
}

.value-prop h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.value-prop p {
    color: var(--text-light);
    font-size: 1.1rem;
    line-height: 1.7;
}

.value-prop h3 .material-icons {
    color: var(--primary-color);
}

/* 課題セクション */
.pain-points {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.pain-point-item {
    text-align: center;
    padding: 2rem 1rem;
}

.pain-icon {
    font-size: 48px;
    color: #ef4444;
    margin-bottom: 1rem;
    display: block;
}

.pain-point-item h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.pain-point-item p {
    color: var(--text-light);
    line-height: 1.7;
    font-size: 1.1rem;
}

/* ソリューションベネフィット */
.solution-benefits {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.benefit-item {
    text-align: center;
    padding: 2rem;
    background: var(--bg-light);
    border-radius: 8px;
    transition: transform 0.3s;
}

.benefit-item:hover {
    transform: translateY(-5px);
}

.benefit-icon {
    font-size: 48px;
    color: var(--primary-color);
    margin-bottom: 1rem;
    display: block;
}

.benefit-item h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.benefit-item p {
    color: var(--text-light);
    font-size: 1.1rem;
    line-height: 1.7;
}

.mt-5 {
    margin-top: 3rem;
}

/* 料金についてセクション */
.pricing {
    background: var(--bg-light);
}

/* CTAセクション */
.cta-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
}

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

.cta-section .section-text {
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: 2rem;
}

/* フッター */
.footer {
    background: var(--text-color);
    color: white;
    padding: 3rem 0 1.5rem;
}

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

.footer-section h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.footer-section p {
    line-height: 1.7;
    opacity: 0.9;
    font-size: 1rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.8;
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-white);
        flex-direction: column;
        padding: 1rem;
        box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    }

    .nav-menu.active {
        display: flex;
    }

    .mobile-menu-toggle {
        display: flex;
    }

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

    .hero-subtitle {
        font-size: 1.125rem;
    }

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

    .flow-steps {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .voice-channels {
        gap: 1.5rem;
    }

    .channel-icon {
        width: 60px;
        height: 60px;
    }

    .channel-icon .material-icons {
        font-size: 30px;
    }

    .channel-name {
        font-size: 0.85rem;
    }

    .pain-points,
    .solution-benefits,
    .value-props {
        grid-template-columns: 1fr;
    }
}

/* アニメーション */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content,
.flow-step,
section {
    animation: fadeIn 0.8s ease-out;
}

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