/* PROSALES Landing Page - Dify.ai Inspired Styles */

/* CSS Variables */
:root {
    /* Colors - Dify.ai inspired palette */
    --primary-50: #f0f9ff;
    --primary-100: #e0f2fe;
    --primary-200: #bae6fd;
    --primary-300: #7dd3fc;
    --primary-400: #38bdf8;
    --primary-500: #0ea5e9;
    --primary-600: #0284c7;
    --primary-700: #0369a1;
    --primary-800: #075985;
    --primary-900: #0c4a6e;
    
    --secondary-50: #f8fafc;
    --secondary-100: #f1f5f9;
    --secondary-200: #e2e8f0;
    --secondary-300: #cbd5e1;
    --secondary-400: #94a3b8;
    --secondary-500: #64748b;
    --secondary-600: #475569;
    --secondary-700: #334155;
    --secondary-800: #1e293b;
    --secondary-900: #0f172a;
    
    --accent-50: #fefce8;
    --accent-100: #fef3c7;
    --accent-200: #fde68a;
    --accent-300: #fcd34d;
    --accent-400: #fbbf24;
    --accent-500: #f59e0b;
    --accent-600: #d97706;
    --accent-700: #b45309;
    --accent-800: #92400e;
    --accent-900: #78350f;
    
    --success-50: #ecfdf5;
    --success-500: #10b981;
    --success-600: #059669;
    
    --error-50: #fef2f2;
    --error-500: #ef4444;
    --error-600: #dc2626;
    
    --warning-50: #fffbeb;
    --warning-500: #f59e0b;
    --warning-600: #d97706;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;
    
    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    --spacing-20: 5rem;
    --spacing-24: 6rem;
    --spacing-32: 8rem;
    
    /* Border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html,
body {
    overflow-x: hidden; 
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--secondary-800);
    background-color: #ffffff;
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--secondary-900);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

p {
    margin-bottom: var(--spacing-4);
    color: var(--secondary-600);
}

a {
    color: var(--primary-600);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-700);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-6);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--secondary-200);
    transition: all var(--transition-normal);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    font-weight: 700;
    font-size: var(--font-size-xl);
    color: var(--secondary-900);
}

.brand-logo {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-size-lg);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-8);
}


.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-8);
}

.nav-link {
    font-weight: 500;
    color: var(--secondary-700);
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--primary-600);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-500);
    transition: width var(--transition-fast);
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.nav-actions .btn {
    font-size: var(--font-size-sm);
    padding: var(--spacing-2) var(--spacing-4);
    white-space: nowrap;
}

.nav-actions .btn-outline {
    background: transparent;
    color: var(--primary-600);
    border: 1px solid var(--primary-600);
    transition: var(--transition-normal);
}

.nav-actions .btn-outline:hover {
    background: var(--primary-50);
    color: var(--primary-700);
    border-color: var(--primary-700);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--secondary-700);
    transition: all var(--transition-fast);
}

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

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

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-radius: var(--radius-lg);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
    color: white;
    border-color: var(--primary-500);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-600), var(--primary-700));
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
    color: white;
}

.btn-outline {
    background: transparent;
    color: var(--secondary-700);
    border-color: var(--secondary-300);
}

.btn-outline:hover {
    background: var(--secondary-50);
    border-color: var(--secondary-400);
    color: var(--secondary-800);
}

.btn-large {
    padding: var(--spacing-4) var(--spacing-8);
    font-size: var(--font-size-base);
}

.btn-block {
    width: 100%;
}

/* Hero Section */
.hero {
    padding: 120px 0 var(--spacing-32);
    background: linear-gradient(135deg, var(--primary-50) 0%, var(--secondary-50) 100%);
    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 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23e2e8f0" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.5;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-6);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-16);
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-content {
    max-width: 600px;
}

.hero-badge {
    display: inline-block;
    margin-bottom: var(--spacing-6);
}

.badge-text {
    background: linear-gradient(135deg, var(--accent-500), var(--accent-600));
    color: white;
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.hero-title {
    font-size: var(--font-size-6xl);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-6);
    color: var(--secondary-900);
}

.title-line {
    display: block;
}

.highlight {
    background: linear-gradient(135deg, var(--primary-600), var(--accent-500));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: var(--font-size-xl);
    color: var(--secondary-600);
    margin-bottom: var(--spacing-8);
    line-height: 1.6;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-12);
}

/* 桌面端：按钮等宽 */
.hero-actions .btn {
    flex: 1;
    min-width: 0;
}

.hero-stats {
    display: flex;
    gap: var(--spacing-8);
}

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

.stat-number {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--primary-600);
    display: block;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--secondary-600);
    margin-top: var(--spacing-1);
}

/* Hero Visual */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.visual-container {
    position: relative;
    width: 100%;
    max-width: 500px;
}

.dashboard-preview {
    background: white;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
    overflow: hidden;
    border: 1px solid var(--secondary-200);
}

.dashboard-header {
    background: var(--secondary-50);
    padding: var(--spacing-4) var(--spacing-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--secondary-200);
}

.dashboard-title {
    font-weight: 600;
    color: var(--secondary-800);
}

.dashboard-controls {
    display: flex;
    gap: var(--spacing-2);
}

.control-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--secondary-300);
}

.control-dot:first-child {
    background: var(--error-500);
}

.control-dot:nth-child(2) {
    background: var(--warning-500);
}

.control-dot:last-child {
    background: var(--success-500);
}

.dashboard-content {
    padding: var(--spacing-6);
}

.chart-container {
    display: flex;
    align-items: end;
    gap: var(--spacing-3);
    height: 120px;
    margin-bottom: var(--spacing-6);
}

.chart-bar {
    flex: 1;
    background: linear-gradient(135deg, var(--primary-400), var(--primary-500));
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    min-height: 20px;
}

.data-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4);
}

.data-card {
    background: var(--secondary-50);
    padding: var(--spacing-4);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.card-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.card-content {
    flex: 1;
}

.card-value {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--secondary-900);
}

.card-label {
    font-size: var(--font-size-sm);
    color: var(--secondary-600);
}

/* Section Styles */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-16);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-4);
    color: var(--secondary-900);
}

.section-description {
    font-size: var(--font-size-xl);
    color: var(--secondary-600);
    line-height: 1.6;
}

/* Features Section */
.features {
    padding: var(--spacing-32) 0;
    background: white;
}

/* Features Summary Bar */
.features-summary {
    display: flex;
    justify-content: center;
    gap: var(--spacing-8);
    margin: var(--spacing-12) 0;
    padding: var(--spacing-6);
    background: linear-gradient(135deg, var(--primary-50), var(--primary-100));
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--primary-200);
}

.features-summary .summary-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-4);
    background: white;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

.features-summary .summary-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.features-summary .summary-item i {
    color: var(--primary-500);
    font-size: var(--font-size-lg);
}

.features-summary .summary-item span {
    font-size: var(--font-size-sm);
    color: var(--gray-600);
    font-weight: 500;
}

.features-summary .summary-item strong {
    font-size: var(--font-size-lg);
    color: var(--success-600);
    font-weight: 700;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-8);
}

.feature-card {
    background: white;
    padding: var(--spacing-8);
    border-radius: var(--radius-2xl);
    border: 1px solid var(--secondary-200);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.feature-badge {
    position: absolute;
    top: 8px;
    right: var(--spacing-6);
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--border-radius-full);
    font-size: var(--font-size-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    z-index: 2;
}

.feature-card.popular .feature-badge {
    background: var(--success-500);
    color: white;
}

.feature-card.featured .feature-badge {
    background: var(--primary-500);
    color: white;
}

.feature-card.popular {
    border: 2px solid var(--success-200);
    background: linear-gradient(135deg, #f0fdf4 0%, #ffffff 100%);
}

.feature-card.featured {
    border: 2px solid var(--primary-200);
    background: linear-gradient(135deg, #eff6ff 0%, #ffffff 100%);
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, var(--primary-500), var(--accent-500));
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

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

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-200);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-6);
}

.feature-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-4);
    color: var(--secondary-900);
}

.feature-description {
    color: var(--secondary-600);
    line-height: 1.6;
}

/* Benefits Section */
.benefits {
    padding: var(--spacing-32) 0;
    background: var(--secondary-50);
}

.benefits-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-16);
    align-items: center;
}

.benefits-text {
    max-width: 600px;
}

.benefits-list {
    margin-top: var(--spacing-8);
}

.benefit-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-6);
}

.benefit-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--accent-500), var(--accent-600));
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-size-lg);
    flex-shrink: 0;
}

.benefit-content h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-2);
    color: var(--secondary-900);
}

.benefit-content p {
    color: var(--secondary-600);
    margin: 0;
}

.benefits-visual {
    display: flex;
    justify-content: center;
}

.visual-card {
    background: white;
    padding: var(--spacing-8);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--secondary-200);
    width: 100%;
    max-width: 400px;
}

.card-header h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-6);
    color: var(--secondary-900);
}

.progress-item {
    margin-bottom: var(--spacing-6);
}

.progress-label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--secondary-700);
    margin-bottom: var(--spacing-2);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--secondary-300);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: var(--spacing-2);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(135deg, var(--primary-500), var(--accent-500));
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
}

.progress-value {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--primary-600);
    text-align: right;
}

/* Pricing Section */
.pricing {
    padding: var(--spacing-32) 0;
    background: white;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: auto 1fr auto; 
    gap: var(--spacing-8);
    max-width: 1000px; 
    margin: 0 auto; 
}

.pricing-card {
    /* --- レイアウト関連 --- */
    display: grid;
    grid-row: span 3;
    grid-template-rows: subgrid;
    background: white;
    padding: var(--spacing-8);
    border-radius: var(--radius-2xl);
    border: 1px solid var(--secondary-200);
    transition: all var(--transition-normal);
    position: relative; 
}

.pricing-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.pricing-badge {
    position: absolute;
    top: var(--spacing-4);
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--accent-500), var(--accent-600));
    color: white;
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-align: center;
}


.pricing-header {
    text-align: center;
    margin-bottom: var(--spacing-1);
}

.pricing-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-4);
    color: var(--secondary-900);
}

.pricing-price {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-1);
}

.price-amount {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--primary-600);
}

.price-period {
    font-size: var(--font-size-sm);
    color: var(--secondary-600);
}

.pricing-features ul {
    list-style: none;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-2) 0;
    color: var(--secondary-700);
}

.pricing-features i {
    color: var(--success-500);
    font-size: var(--font-size-sm);
}

.pricing-action {
    margin-top: auto;
}

/* --- Risk Reduction Banner --- */

.risk-reduction-banner {
    margin: var(--spacing-8) 0;
    padding: var(--spacing-6);
    background: linear-gradient(135deg, var(--success-50), var(--success-100));
    border-radius: var(--radius-lg);
    border: 2px solid var(--success-200);
}

.banner-content {
    display: flex;
    justify-content: center;
    gap: var(--spacing-8);
    flex-wrap: wrap;
}

.banner-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-4);
    background: white;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
    font-weight: 600;
    color: var(--success-700);
}

.banner-item i {
    color: var(--success-500);
    font-size: var(--font-size-lg);
}

/* Contact Section */
.contact {
    padding: var(--spacing-32) 0;
    background: var(--secondary-50);
}

.contact-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-16);
    max-width: 1000px;
    margin: 0 auto;
}

.contact-form {
    background: white;
    padding: var(--spacing-8);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--secondary-200);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-4);
}

.form-group {
    margin-bottom: var(--spacing-4);
}

.form-group label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--secondary-700);
    margin-bottom: var(--spacing-2);
}

.required {
    color: var(--error-500);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    border: 1px solid var(--secondary-300);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
    background: white;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px var(--primary-100);
}

.form-action {
    margin-top: var(--spacing-6);
}

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

.info-card {
    background: white;
    padding: var(--spacing-8);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--secondary-200);
    height: fit-content;
}

.info-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-6);
    color: var(--secondary-900);
}

.info-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-6);
}

.info-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.info-content {
    flex: 1;
}

.info-content strong {
    color: var(--secondary-900);
    font-weight: 600;
}

/* Footer */
.footer {
    background: #333;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: flex; 
    gap: 4rem; 
    margin-bottom: 2rem;
}

.footer-content div{
    max-width: 300px;
}

.footer h4 {
    font-weight: normal;
    font-size: var(--transition-normal);
    margin-bottom: 1rem;
    color: #667eea;
}

.footer p {
    font-weight: normal;
    font-size: var(--transition-normal);
    color: #ccc;
}

.footer a {
    color: #ccc;
    text-decoration: none;
    display: block;
    margin-bottom: 0.5rem;
    transition: color 0.3s ease;
}

.footer a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #555;
    color: #ccc;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-link i {
    font-size: 2.5rem;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-12);
        text-align: center;
    }
    
    .benefits-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-12);
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-12);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-12);
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* 平板设备：确保内容容器宽度 */
    .hero-content {
        width: 100%;
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: white;
        border-top: 1px solid var(--secondary-200);
        padding: var(--spacing-6);
        box-shadow: var(--shadow-lg);
        z-index: 1000;
        opacity: 0;
        visibility: hidden;
        transform: translateY(-20px);
        transition: all var(--transition-normal);
    }
    
    .nav-menu.active {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }
    
    .nav-links {
        flex-direction: column;
        gap: var(--spacing-4);
        margin-bottom: var(--spacing-6);
    }
    
    .nav-actions {
        justify-content: center;
        flex-direction: column;
        gap: var(--spacing-3);
        width: 100%;
    }
    
    .nav-actions .btn {
        width: 100%;
        text-align: center;
        padding: var(--spacing-3) var(--spacing-4);
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero {
        padding: 100px 0 var(--spacing-24);
    }
    
    .hero-title {
        font-size: var(--font-size-4xl);
    }
    
    /* 移动端：确保父容器和按钮都是100%宽度 */
    .hero-content {
        width: 100%;
        max-width: 100%;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: stretch;
        width: 100%;
    }
    
    .hero-actions .btn {
        width: 100%;
        flex: none;
        display: flex;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-card.featured {
        transform: none;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: var(--spacing-6);
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-4);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-4);
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .hero-description {
        font-size: var(--font-size-lg);
    }
    
    .section-title {
        font-size: var(--font-size-3xl);
    }
    
    .section-description {
        font-size: var(--font-size-lg);
    }
    
    .btn-large {
        padding: var(--spacing-3) var(--spacing-6);
        font-size: var(--font-size-sm);
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.animate-fade-in-left {
    animation: fadeInLeft 0.6s ease-out;
}

.animate-fade-in-right {
    animation: fadeInRight 0.6s ease-out;
}

/* Scroll animations */
.scroll-animate {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease-out;
}

.scroll-animate.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Loading states */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

/* Focus states for accessibility */
.btn:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 2px solid var(--primary-500);
    outline-offset: 2px;
}

/* Feature Details */
.feature-details {
    list-style: none;
    padding: 0;
    margin-top: var(--spacing-4);
}

.feature-details li {
    padding: var(--spacing-2) 0;
    color: var(--secondary-600);
    position: relative;
    padding-left: var(--spacing-6);
}

.feature-details li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-500);
    font-weight: bold;
}

/* Features Highlight Section */
.features-highlight {
    padding: var(--spacing-20) 0;
    background: var(--gray-50);
}

.features-highlight-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-8);
    margin-top: var(--spacing-12);
}

.feature-highlight-card {
    background: white;
    padding: var(--spacing-8);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
    transition: var(--transition-normal);
    text-align: center;
}

.feature-highlight-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.feature-highlight-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-6);
    color: white;
    font-size: var(--font-size-2xl);
}

.feature-highlight-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-4);
    color: var(--gray-900);
    line-height: 1.4;
}

.feature-highlight-card p {
    color: var(--gray-600);
    line-height: 1.6;
    font-size: var(--font-size-base);
}

/* Problem Solution Section */
.problem-solution {
    padding: var(--spacing-20) 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.problem-solution-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-12);
    margin-top: var(--spacing-12);
}

.problem-card,
.solution-card {
    background: white;
    padding: var(--spacing-8);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--gray-200);
    position: relative;
    overflow: hidden;
    transition: var(--transition-normal);
}

.problem-card:hover,
.solution-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.problem-card {
    border-left: 6px solid var(--error-500);
    background: linear-gradient(135deg, #fef2f2 0%, #ffffff 100%);
}

.problem-card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1), transparent);
    border-radius: 0 0 0 100px;
}

.solution-card {
    border-left: 6px solid var(--success-500);
    background: linear-gradient(135deg, #f0fdf4 0%, #ffffff 100%);
}

.solution-card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.1), transparent);
    border-radius: 0 0 0 100px;
}

.problem-icon,
.solution-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-6);
    font-size: var(--font-size-2xl);
    position: relative;
    z-index: 2;
}

.problem-icon {
    background: linear-gradient(135deg, var(--error-500), var(--error-600));
    color: white;
    box-shadow: 0 8px 25px rgba(239, 68, 68, 0.3);
}

.solution-icon {
    background: linear-gradient(135deg, var(--success-500), var(--success-600));
    color: white;
    box-shadow: 0 8px 25px rgba(34, 197, 94, 0.3);
}

.problem-card h3,
.solution-card h3 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-6);
    color: var(--gray-900);
    position: relative;
    z-index: 2;
}

.problem-list,
.solution-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-5);
    position: relative;
    z-index: 2;
}

.problem-item,
.solution-item {
    padding: var(--spacing-5);
    border-radius: var(--border-radius-lg);
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: var(--transition-normal);
    position: relative;
}

.problem-item:hover,
.solution-item:hover {
    background: rgba(255, 255, 255, 0.95);
    transform: translateX(8px);
}

.problem-item h4,
.solution-item h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-3);
    color: var(--gray-900);
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.problem-item h4::before {
    content: '⚠️';
    font-size: var(--font-size-lg);
}

.solution-item h4::before {
    content: '✅';
    font-size: var(--font-size-lg);
}

.problem-item p,
.solution-item p {
    font-size: var(--font-size-base);
    color: var(--gray-600);
    line-height: 1.6;
    margin-left: calc(var(--spacing-3) + 1.5em);
}

/* Comparison Section */
.comparison {
    padding: var(--spacing-20) 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.comparison-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-8);
    margin-top: var(--spacing-12);
    max-width: 800px; 
    margin-left: auto;  
    margin-right: auto;
}

.comparison-card {
    background: white;
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--gray-200);
    overflow: hidden;
    transition: var(--transition-normal);
    position: relative;
}

.comparison-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.prosales-card {
    border: 2px solid var(--success-500);
    background: linear-gradient(135deg, #f0fdf4 0%, #ffffff 100%);
}

.prosales-card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.1), transparent);
    border-radius: 0 0 0 100px;
}

.competitor-card {
    border: 2px solid var(--secondary-300); /* gray -> secondary に修正 */
    background: linear-gradient(135deg, #f9fafb 0%, #ffffff 100%);
}

.competitor-card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, rgba(107, 114, 128, 0.1), transparent);
    border-radius: 0 0 0 100px;
}

.competitor-card .card-badge.basic {
    background: var(--secondary-500); /* gray -> secondary に修正 */
    color: white;
}

.competitor-card .feature-item.limited i {
    color: var(--error-500); /* danger -> error に修正 */
}

.card-header {
    padding: var(--spacing-8);
    text-align: center;
    position: relative;
    z-index: 2;
}

.card-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-4);
    font-size: var(--font-size-2xl);
}

.prosales-card .card-icon {
    background: linear-gradient(135deg, var(--success-500), var(--success-600));
    color: white;
    box-shadow: 0 8px 25px rgba(34, 197, 94, 0.3);
}

.competitor-card .card-icon {
    background: linear-gradient(135deg, var(--secondary-400), var(--secondary-500));
    color: white;
    box-shadow: 0 8px 25px rgba(107, 114, 128, 0.3);
}

.card-header h3 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-3);
    color: var(--gray-900);
}

.card-badge {
    display: inline-block;
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--border-radius-full);
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.prosales-card .card-badge {
    background: var(--success-500);
    color: white;
}

.competitor-card .card-badge.basic {
    background: var(--gray-500);
    color: white;
}

.card-features {
    padding: 0 var(--spacing-8) var(--spacing-8);
}

.feature-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-1);
    padding: var(--spacing-1);
    border-radius: var(--border-radius-md);
    margin-bottom: var(--spacing-2);
    transition: var(--transition-normal);
}

.feature-item:hover {
    background: rgba(0, 0, 0, 0.02);
    transform: translateX(4px);
}

.feature-item i {
    font-size: var(--font-size-lg);
    width: 24px;
    text-align: center;
}

.prosales-card .feature-item i {
    color: var(--success-500);
}

.competitor-card .feature-item.limited i {
    color: var(--error-500);
}

.feature-item span {
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--gray-700);
}

.comparison-summary {
    margin-top: var(--spacing-12);
    text-align: center;
}

.summary-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-6);
    background: white;
    padding: var(--spacing-8);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--gray-200);
    max-width: 600px;
    margin: 0 auto;
}

.summary-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-2xl);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.3);
}

.summary-text h4 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-2);
}

.summary-text p {
    font-size: var(--font-size-base);
    color: var(--gray-600);
    line-height: 1.6;
}

/* CTA Sections */
.roi-cta,
.comparison-cta {
    margin-top: var(--spacing-16);
    padding: var(--spacing-12);
    background: linear-gradient(135deg, var(--primary-50), var(--primary-100));
    border-radius: var(--border-radius-xl);
    text-align: center;
    border: 1px solid var(--primary-200);
}

.cta-content h3 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-4);
}

.cta-content p {
    font-size: var(--font-size-lg);
    color: var(--gray-600);
    margin-bottom: var(--spacing-8);
    line-height: 1.6;
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-4);
    justify-content: center;
    flex-wrap: wrap;
}

.btn-large {
    padding: var(--spacing-4) var(--spacing-8);
    font-size: var(--font-size-lg);
    font-weight: 600;
    border-radius: var(--border-radius-lg);
    transition: var(--transition-normal);
}

.btn-large:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Before/After Visualization */
.before-after-section {
    margin: var(--spacing-12) 0;
    padding: var(--spacing-8);
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    border-radius: var(--border-radius-xl);
}

.before-after-container {
    display: flex;
    flex-direction: row; /* PCでは横並び */
    align-items: center;
    gap: var(--spacing-6);
    justify-content: center;
}

.before-after-item {
    flex: 1;
    min-width: 0; /* flexアイテムの縮小問題を防止 */
    background: white;
    padding: var(--spacing-6);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
}

.before-after-item h3 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-6);
}

.before h3 {
    color: var(--error-600);
}

.after h3 {
    color: var(--success-600);
}

.arrow-container {
    font-size: var(--font-size-3xl);
    color: var(--primary-500);
    transition: transform 0.3s ease-in-out;
}

.metrics-visual {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
    text-align: left;
}

.metric-bar {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.metric-label {
    font-weight: 500;
    color: var(--secondary-700);
    width: 80px; /* ラベルの幅を固定 */
    flex-shrink: 0;
}

.bar-container {
    flex-grow: 1; /* 残りのスペースを全て使用 */
    position: relative;
    height: 24px;
    background: var(--secondary-200);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.bar-fill {
    height: 100%;
    border-radius: var(--radius-md);
    background: linear-gradient(90deg, var(--error-500), var(--error-600));
    transition: width 1.5s ease-out;
}

.bar-fill.success {
    background: linear-gradient(90deg, var(--success-500), var(--success-600));
}

.bar-value {
    position: absolute;
    right: var(--spacing-3);
    top: 50%;
    transform: translateY(-50%);
    font-weight: 600;
    color: black;
    font-size: var(--font-size-sm);
}

/* Pricing Improvements */
.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-500);
    color: white;
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--border-radius-full);
    font-size: var(--font-size-sm);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    z-index: 2;
}

.pricing-card.recommended,
.pricing-card.featured {
    position: relative; 
    z-index: 10;
    border: 1px solid transparent; 
    box-shadow: 0 0 0 3px var(--primary-500);
}

.pricing-card.recommended:hover,
.pricing-card.featured:hover {
    transform: translateY(-4px); 
    box-shadow: 0 10px 25px rgba(0,0,0,0.2), 0 0 0 3px var(--primary-500);
}

/* Popular Questions */
.popular-questions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-6);
    margin: var(--spacing-8) 0;
}

.popular-question-item {
    display: flex;
    gap: var(--spacing-4);
    padding: var(--spacing-6);
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--gray-200);
    transition: var(--transition-normal);
}

.popular-question-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.popular-badge {
    background: var(--primary-500);
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: var(--font-size-lg);
    flex-shrink: 0;
}

.popular-content h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-2);
}

.popular-content p {
    color: var(--gray-600);
    line-height: 1.6;
}

/* Technology Section */
.technology {
    padding: var(--spacing-32) 0;
    background: var(--secondary-50);
}

.technology-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-8);
}

.tech-card {
    background: white;
    padding: var(--spacing-8);
    border-radius: var(--radius-2xl);
    text-align: center;
    border: 1px solid var(--secondary-200);
    transition: all var(--transition-normal);
}

.tech-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-200);
}

.tech-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
    border-radius: var(--radius-2xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-size-3xl);
    margin: 0 auto var(--spacing-6);
}

.tech-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-4);
    color: var(--secondary-900);
}

.tech-card p {
    color: var(--secondary-600);
    margin: 0;
}

/* Testimonials Section */
.testimonials {
    padding: var(--spacing-32) 0;
    background: white;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-8);
}

.testimonial-card {
    background: var(--secondary-50);
    padding: var(--spacing-8);
    border-radius: var(--radius-2xl);
    border: 1px solid var(--secondary-200);
    transition: all var(--transition-normal);
}

.testimonial-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.testimonial-content {
    margin-bottom: var(--spacing-6);
}

.quote-icon {
    color: var(--primary-500);
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-4);
}

.testimonial-text {
    font-size: var(--font-size-lg);
    color: var(--secondary-700);
    line-height: 1.6;
    font-style: italic;
    margin: 0;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
}

.author-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
}

.author-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.avatar-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-size-xl);
}

.avatar-placeholder.large {
    font-size: var(--font-size-3xl);
}

.author-info h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-1);
    color: var(--secondary-900);
}

.author-info p {
    color: var(--secondary-600);
    margin: 0;
    font-size: var(--font-size-sm);
}

/* Case Studies Section */
.case-studies {
    padding: var(--spacing-32) 0;
    background: var(--secondary-50);
}

.case-studies-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-8);
}

.case-study-card {
    background: white;
    border-radius: var(--radius-2xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--secondary-200);
    transition: all var(--transition-normal);
}

.case-study-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.case-study-image {
    height: 200px;
    overflow: hidden;
}

.case-study-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.image-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-100), var(--primary-200));
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--primary-600);
    font-size: var(--font-size-2xl);
    font-weight: 600;
}

.image-placeholder i {
    margin-bottom: var(--spacing-2);
    font-size: var(--font-size-4xl);
}

.image-placeholder span {
    font-size: var(--font-size-lg);
}

.case-study-content {
    padding: var(--spacing-6);
}

.case-study-content h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-2);
    color: var(--secondary-900);
}

.case-study-industry {
    color: var(--primary-600);
    font-weight: 500;
    margin-bottom: var(--spacing-4);
}

.case-study-result {
    color: var(--secondary-600);
    line-height: 1.6;
    margin-bottom: var(--spacing-6);
}

.case-study-metrics {
    display: flex;
    gap: var(--spacing-6);
}

.metric {
    text-align: center;
}

.metric-value {
    display: block;
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--primary-600);
}

.metric-label {
    font-size: var(--font-size-sm);
    color: var(--secondary-600);
}

/* FAQ Section */
.faq {
    padding: var(--spacing-32) 0;
    background: white;
}

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

.faq-item {
    border: 1px solid var(--secondary-200);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-4);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.faq-item:hover {
    border-color: var(--primary-300);
}

.faq-question {
    padding: var(--spacing-6);
    background: var(--secondary-50);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all var(--transition-normal);
}

.faq-question:hover {
    background: var(--primary-50);
}

.faq-question h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--secondary-900);
    margin: 0;
}

.faq-question i {
    color: var(--primary-600);
    transition: transform var(--transition-normal);
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 var(--spacing-6);
    max-height: 0;
    overflow: hidden;
    transition: all var(--transition-normal);
}

.faq-item.active .faq-answer {
    padding: var(--spacing-6);
    max-height: 200px;
}

.faq-answer p {
    color: var(--secondary-600);
    line-height: 1.6;
    margin: 0;
}

/* Team Section */
.team {
    padding: var(--spacing-32) 0;
    background: var(--secondary-50);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-8);
}

.team-member {
    background: white;
    padding: var(--spacing-8);
    border-radius: var(--radius-2xl);
    text-align: center;
    border: 1px solid var(--secondary-200);
    transition: all var(--transition-normal);
}

.team-member:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-200);
}

.member-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 auto var(--spacing-6);
    border: 4px solid var(--primary-100);
}

.member-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.member-avatar .avatar-placeholder {
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
    border: 4px solid var(--primary-100);
}

.member-info h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-2);
    color: var(--secondary-900);
}

.member-position {
    color: var(--primary-600);
    font-weight: 500;
    margin-bottom: var(--spacing-4);
}

.member-description {
    color: var(--secondary-600);
    line-height: 1.6;
    margin-bottom: var(--spacing-6);
}

.member-social {
    display: flex;
    justify-content: center;
    gap: var(--spacing-4);
}

.member-social a {
    width: 40px;
    height: 40px;
    background: var(--secondary-100);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--secondary-600);
    transition: all var(--transition-fast);
}

.member-social a:hover {
    background: var(--primary-600);
    color: white;
}

/* ROI Section */
.roi {
    padding: var(--spacing-32) 0;
    background: var(--secondary-50);
}

.roi-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-16);
    align-items: start;
}

.roi-stats {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
}

.roi-stat-card {
    background: white;
    padding: var(--spacing-8);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--secondary-200);
    display: flex;
    align-items: center;
    gap: var(--spacing-6);
    transition: all var(--transition-normal);
}

.roi-stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.stat-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-size-2xl);
    flex-shrink: 0;
}

.stat-content {
    flex: 1;
}

.stat-number {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--primary-600);
    margin-bottom: var(--spacing-1);
}

.stat-label {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--secondary-900);
    margin-bottom: var(--spacing-2);
}

.stat-description {
    color: var(--secondary-600);
    font-size: var(--font-size-sm);
}

.roi-details h3 {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    margin-bottom: var(--spacing-6);
    color: var(--secondary-900);
}

.roi-list {
    display: grid;
    gap: var(--spacing-4);
}

.roi-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-4);
    padding: var(--spacing-4);
    background: white;
    border-radius: var(--radius-lg);
    border: 1px solid var(--secondary-200);
}

.roi-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--accent-500), var(--accent-600));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.roi-text {
    flex: 1;
}

.roi-text strong {
    color: var(--secondary-900);
    font-weight: 600;
}

/* Integration Section */
.integration {
    padding: var(--spacing-32) 0;
    background: white;
}

.integration-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-16);
    align-items: center;
}

.integration-list {
    display: grid;
    gap: var(--spacing-4);
}

.integration-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    padding: var(--spacing-4);
    background: var(--secondary-50);
    border-radius: var(--radius-lg);
    border: 1px solid var(--secondary-200);
    transition: all var(--transition-normal);
}

.integration-item:hover {
    background: white;
    box-shadow: var(--shadow-md);
    border-color: var(--primary-200);
}

.integration-icon {
    width: 50px;
    height: 50px;
    background: white;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-600);
    font-size: var(--font-size-xl);
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.integration-info h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-1);
    color: var(--secondary-900);
}

.integration-info p {
    color: var(--secondary-600);
    margin: 0;
    font-size: var(--font-size-sm);
}

.integration-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.integration-diagram {
    position: relative;
    width: 300px;
    height: 300px;
}

.center-system {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 2;
}

.system-box {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
    border-radius: var(--radius-2xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: var(--shadow-xl);
    border: 4px solid white;
}

.system-box i {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-2);
}

.system-box span {
    font-size: var(--font-size-sm);
    font-weight: 600;
}

.system-box.small {
    width: 80px;
    height: 80px;
    font-size: var(--font-size-sm);
}

.system-box.small i {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-1);
}

.system-box.small span {
    font-size: var(--font-size-xs);
}

.connected-systems {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.system-connector {
    position: absolute;
    width: 250px; /* 線の長さを調整（必要に応じて） */
    height: 2px;
    background: var(--secondary-300);
    top: 50%;
    left: 50%;
    transform-origin: left center; /* 中央のボックスの中心から回転 */
}

/* 各コネクタを正しい位置に回転 */
.system-connector:nth-child(1) {
    transform: rotate(45deg); /* 右上 */
}
.system-connector:nth-child(2) {
    transform: rotate(135deg); /* 左上 */
}
.system-connector:nth-child(3) {
    transform: rotate(225deg); /* 左下 */
}
.system-connector:nth-child(4) {
    transform: rotate(315deg); /* 右下 */
}
/* 他の要素があれば追加で rotate(22.5deg), rotate(67.5deg) などを設定 */


.system-connector .system-box {
    position: absolute;
    /* コネクタの右端に配置 */
    right: 0;
    top: -40px; /* `system-box.small`の高さの半分（80px/2）をマイナス */
    transform: rotate(calc(-1 * var(--rotation-angle, 0deg))); /* 親の回転を打ち消す */
}

/* 親の rotation を打ち消すための変数定義（各コネクタに個別設定） */
.system-connector:nth-child(1) .system-box {
    --rotation-angle: 45deg;
}
.system-connector:nth-child(2) .system-box {
    --rotation-angle: 135deg;
}
.system-connector:nth-child(3) .system-box {
    --rotation-angle: 225deg;
}
.system-connector:nth-child(4) .system-box {
    --rotation-angle: 315deg;
}

/* Security & Compliance Section */
.security-compliance {
    padding: var(--spacing-32) 0;
    background: var(--secondary-50);
}

.security-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-8);
}

.security-card {
    background: white;
    padding: var(--spacing-8);
    border-radius: var(--radius-2xl);
    text-align: center;
    border: 1px solid var(--secondary-200);
    transition: all var(--transition-normal);
}

.security-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-200);
}

.security-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
    border-radius: var(--radius-2xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-size-3xl);
    margin: 0 auto var(--spacing-6);
}

.security-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-4);
    color: var(--secondary-900);
}

.security-card p {
    color: var(--secondary-600);
    margin: 0;
    line-height: 1.6;
}

/* Pricing Updates */
.pricing-subtitle {
    color: var(--primary-600);
    font-weight: 500;
    font-size: var(--font-size-sm);
}

.pricing-note {
    margin-top: var(--spacing-8);
    text-align: center;
    padding: var(--spacing-4);
    background: var(--warning-50);
    border-radius: var(--radius-lg);
    border: 1px solid var(--warning-200);
}

.pricing-note p {
    color: var(--warning-700);
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
}

.pricing-note i {
    color: var(--warning-600);
}

/* style.css に追加 */

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-lg);
}

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

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

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

/* フォーム関連のスタイル */
.form-error, .field-error {
    color: var(--error-500);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-2);
}

.field-error {
    font-size: var(--font-size-xs);
    margin-top: var(--spacing-1);
}

.form-success {
    background: var(--success-50);
    color: var(--success-600);
    padding: var(--spacing-4);
    border-radius: var(--radius-lg);
    margin-top: var(--spacing-4);
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.loading {
    opacity: 0.6;
    pointer-events: none;
}

/* back-to-top-btn */
.back-to-top-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 999;

    /* 見た目のスタイル */
    width: 50px;
    height: 50px;
    background: var(--primary-600);
    color: white;
    border-radius: 50%;
    box-shadow: var(--shadow-lg);

    /* アイコンを中央に配置 */
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    
    /* 表示・非表示のアニメーション */
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease-in-out;
}

/* ボタンを表示する時のスタイル */
.back-to-top-btn.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* Responsive Updates */
/* style.css の末尾にある既存の @media ルールを全て削除し、以下に置き換える */

/* =============================================== */
/* Responsive Design (Tablet & Desktop Small)      */
/* =============================================== */
@media (max-width: 1024px) {
    /* --- タブレット向けの基本調整 --- */
    body {
        font-size: 15px;
    }
    .container {
        padding: 0 var(--spacing-5);
    }
    
    /* --- 見出しの文字サイズ調整 --- */
    .hero-title, h1 { font-size: 3.5rem; }
    .section-title, h2 { font-size: 2rem; }
    h3 { font-size: 1.75rem; }

    /* --- レイアウト調整 (2列のものを1列に) --- */
    .hero-container,
    .benefits-content,
    .integration-content,
    .roi-content,
    .contact-content,
    .problem-solution-grid,
    .comparison-cards {
        grid-template-columns: 1fr;
        gap: var(--spacing-10);
    }
    .hero-container {
        text-align: center;
    }

    .hero-actions, .hero-stats {
        justify-content: center;
    }
    
    /* 平板设备：确保内容容器宽度 */
    .hero-content {
        width: 100%;
        max-width: 100%;
    }
}


/* =============================================== */
/* Responsive Design (Mobile)                      */
/* =============================================== */
@media (max-width: 768px) {
    /* --- 全体的な調整 --- */
    body, html {
        overflow-x: hidden; /* 横スクロールを強制的に禁止 */
    }
    body {
        font-size: 16px;
        line-height: 1.7;
    }
    .container {
        padding: 0 var(--spacing-4);
    }

    /* --- 見出しの文字サイズと改行を最適化 --- */
    h1, h2, h3, h4, h5, h6 {
        word-wrap: break-word;
        overflow-wrap: break-word;
    }
    .hero-title, h1 { font-size: 1.5rem; line-height: 1.4; } /* 24px */
    .section-title, h2 { font-size: 1.375rem; line-height: 1.4; } /* 22px */
    h3 { font-size: 1.25rem; }
    h4 { font-size: 1.125rem; }
    .section-description, .hero-description { font-size: 1rem; }

    /* --- 全セクションの余白を縮小 --- */
    .hero { padding: 100px 0 var(--spacing-12); }
    .section, .features, .benefits, .pricing, .contact, .team, .roi, .integration, .security-compliance {
        padding-top: var(--spacing-12);
        padding-bottom: var(--spacing-12);
    }
    .section-header {
        margin-bottom: var(--spacing-8);
    }
    
    /* --- ナビゲーションのモバイル対応 --- */
    .nav-menu {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: white;
        padding: var(--spacing-4);
        box-shadow: var(--shadow-lg);
        border-top: 1px solid var(--secondary-200);
    }
    .nav-menu.active { display: flex; }
    .nav-links { flex-direction: column; width: 100%; align-items: center; gap: var(--spacing-1); }
    .nav-link { padding: var(--spacing-3) 0; width: 100%; text-align: center; }
    .nav-actions { display: none; }
    .nav-toggle { display: flex; }

    /* --- レイアウトを全て1列化 --- */
    .features-grid, .pricing-grid, .team-grid, .security-grid, .technology-grid, .testimonials-grid, .case-studies-grid {
        grid-template-columns: 1fr;
    }
    .hero-visual {
        order: initial;
        margin-top: var(--spacing-8);
    }
    .pricing-card.recommended, .pricing-card.featured {
        transform: none;
    }
    /* 移动端：确保父容器和按钮都是100%宽度 */
    .hero-content {
        width: 100%;
        max-width: 100%;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: stretch;
        width: 100%;
    }
    
    .hero-actions .btn {
        width: 100%;
        flex: none;
        display: flex;
    }
    .features-summary {
        flex-direction: column;
        align-items: stretch;
    }
    .dashboard-content .data-cards {
        grid-template-columns: 1fr;
    }
    
    /* --- 画像がはみ出さないように設定 --- */
    img, .visual-container, .dashboard-preview {
        max-width: 100%;
        height: auto;
    }

    /* --- ROIセクションのスマホ表示を縦積みに変更 --- */
    .before-after-container {
        flex-direction: column !important; /* !importantで強制的に縦並びにする */
        gap: var(--spacing-4);
    }
    .arrow-container {
        transform: rotate(90deg) !important; /* !importantで強制的に下向きにする */
        margin: var(--spacing-4) 0;
    }
    .before-after-item {
        width: 100%;
    }

    /* --- フッターの調整 --- */
    .footer-content {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: var(--spacing-8);
    }

    .banner-content {
        flex-direction: column;
        gap: var(--spacing-3);
    }

    .banner-item {
        justify-content: center;
    }
}

/* Print styles */
@media print {
    .navbar,
    .hero-actions,
    .btn,
    .footer {
        display: none !important;
    }
    
    .hero {
        background: white !important;
        color: black !important;
        padding: 20px 0;
    }
    
    .features,
    .benefits,
    .pricing,
    .contact,
    .technology,
    .testimonials,
    .case-studies,
    .faq,
    .team,
    .roi,
    .problem-solution,
    .comparison,
    .integration,
    .security-compliance {
        background: white !important;
    }
}