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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #ffffff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: #2563eb;
    text-decoration: none;
}

.nav-logo i {
    margin-right: 10px;
    font-size: 1.8rem;
}

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

.nav-menu a {
    text-decoration: none;
    color: #64748b;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-menu a:hover {
    color: #2563eb;
}

.nav-cta {
    display: flex;
    align-items: center;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 30px;
    height: 30px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.mobile-menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: #2563eb;
    margin: 3px 0;
    transition: all 0.3s ease;
    border-radius: 2px;
}

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

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

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 14px;
    min-height: 44px; /* Minimum touch target size */
    touch-action: manipulation; /* Prevent double-tap zoom */
}

.btn-primary {
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    color: white;
    box-shadow: 0 4px 14px 0 rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px 0 rgba(37, 99, 235, 0.4);
}

.btn-secondary {
    background: white;
    color: #2563eb;
    border: 2px solid #e2e8f0;
}

.btn-secondary:hover {
    background: #f8fafc;
    border-color: #2563eb;
}

.btn-outline {
    background: transparent;
    color: #2563eb;
    border: 2px solid #2563eb;
}

.btn-outline:hover {
    background: #2563eb;
    color: white;
}

.btn-large {
    padding: 16px 32px;
    font-size: 16px;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 120px 0 80px;
    position: relative;
    overflow: hidden;
}

.gif-placeholder {
    text-align: center;
    padding: 2rem;
}

.gif-icon {
    font-size: 4rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 1rem;
    animation: pulse 2s infinite;
}

.gif-text h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.gif-text p {
    font-size: 1rem;
    opacity: 0.9;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><defs><radialGradient id="a" cx="50%" cy="50%" r="50%"><stop offset="0%" stop-color="%23ffffff" stop-opacity="0.1"/><stop offset="100%" stop-color="%23ffffff" stop-opacity="0"/></radialGradient></defs><circle cx="200" cy="200" r="100" fill="url(%23a)"/><circle cx="800" cy="300" r="150" fill="url(%23a)"/><circle cx="400" cy="700" r="120" fill="url(%23a)"/></svg>');
    opacity: 0.3;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #ffffff 0%, #e2e8f0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    line-height: 1.6;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.dashboard-preview {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 400px;
}

.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.dashboard-title {
    font-weight: 600;
    font-size: 1.1rem;
}

.dashboard-status {
    display: flex;
    align-items: center;
    font-size: 0.9rem;
    opacity: 0.8;
}

.status-dot {
    width: 8px;
    height: 8px;
    background: #10b981;
    border-radius: 50%;
    margin-right: 8px;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.dashboard-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.metric-card {
    text-align: center;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.metric-value {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.metric-label {
    font-size: 0.8rem;
    opacity: 0.8;
}

/* Section Styles */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
    color: #1e293b;
}

.section-description {
    font-size: 1.1rem;
    text-align: center;
    color: #64748b;
    max-width: 800px;
    margin: 0 auto 3rem;
    line-height: 1.7;
}

/* Getting Started Section */
.getting-started {
    padding: 80px 0;
    background: white;
}

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

.step {
    display: flex;
    align-items: flex-start;
    padding: 2rem;
    background: #f8fafc;
    border-radius: 16px;
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
}

.step:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.step-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin-right: 1.5rem;
    flex-shrink: 0;
}

.step-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #1e293b;
}

.step-content p {
    color: #64748b;
    line-height: 1.6;
}

/* Value Proposition Section */
.overview {
    padding: 80px 0;
    background: #f8fafc;
}

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

.value-item {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
}

.value-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.value-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: white;
    font-size: 2rem;
}

.value-item h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1e293b;
}

.value-item p {
    color: #64748b;
    line-height: 1.6;
    font-size: 0.9rem;
}

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

.problem-section,
.solution-section {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
}

.problem-section h3 {
    color: #dc2626;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
}

.problem-section h3::before {
    content: '⚠️';
    margin-right: 0.5rem;
}

.solution-section h3 {
    color: #059669;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
}

.solution-section h3::before {
    content: '✅';
    margin-right: 0.5rem;
}

.problem-list {
    list-style: none;
    padding: 0;
}

.problem-list li {
    padding: 0.75rem 0;
    color: #64748b;
    position: relative;
    padding-left: 1.5rem;
    border-bottom: 1px solid #f1f5f9;
}

.problem-list li::before {
    content: '❌';
    position: absolute;
    left: 0;
    color: #dc2626;
}

.solution-features {
    display: grid;
    gap: 1.5rem;
}

.solution-item {
    display: flex;
    align-items: flex-start;
    padding: 1rem;
    background: #f8fafc;
    border-radius: 12px;
    border: 1px solid #e2e8f0;
}

.solution-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #059669 0%, #047857 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 1rem;
    color: white;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.solution-item h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #1e293b;
}

.solution-item p {
    color: #64748b;
    font-size: 0.9rem;
    line-height: 1.5;
    margin: 0;
}

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

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: white;
    font-size: 2rem;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1e293b;
}

.feature-card p {
    color: #64748b;
    line-height: 1.6;
}

/* Features Section */
.features {
    padding: 80px 0;
}

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

.feature-compact {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
}

.feature-compact:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.feature-compact .feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: white;
    font-size: 1.5rem;
}

.feature-compact h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1e293b;
}

.feature-compact p {
    color: #64748b;
    line-height: 1.6;
    font-size: 0.9rem;
}

.features-grid-large {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.feature-item {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.feature-item .feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    color: white;
    font-size: 1.5rem;
}

.feature-item h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1e293b;
}

.feature-item ul {
    list-style: none;
}

.feature-item li {
    padding: 0.5rem 0;
    color: #64748b;
    position: relative;
    padding-left: 1.5rem;
}

.feature-item li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #10b981;
    font-weight: bold;
}

/* Characteristics Section */
.characteristics {
    padding: 80px 0;
    background: #f8fafc;
}

.characteristics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.characteristic-item {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
}

.characteristic-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.characteristic-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    color: white;
    font-size: 1.5rem;
}

.characteristic-item h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1e293b;
}

.characteristic-item p {
    color: #64748b;
    line-height: 1.6;
}

/* Comparison Table */
.comparison {
    padding: 80px 0;
}

.comparison-table {
    overflow-x: auto;
    margin-top: 3rem;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    scrollbar-color: #cbd5e1 #f1f5f9;
}

.comparison-table::-webkit-scrollbar {
    height: 8px;
}

.comparison-table::-webkit-scrollbar-track {
    background: #f1f5f9;
    border-radius: 4px;
}

.comparison-table::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
}

.comparison-table::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

.comparison-table table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.comparison-table th,
.comparison-table td {
    padding: 1.5rem;
    text-align: left;
    border-bottom: 1px solid #e2e8f0;
}

.comparison-table th {
    background: #f8fafc;
    font-weight: 600;
    color: #1e293b;
}

.comparison-table tr:hover {
    background: #f8fafc;
}

/* Benefits Section */
.benefits {
    padding: 80px 0;
    background: #f8fafc;
}

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

.benefit-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
}

.benefit-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.benefit-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: white;
    font-size: 2rem;
}

.benefit-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1e293b;
}

.benefit-card p {
    color: #64748b;
    line-height: 1.6;
}

/* Deployment Section */
.deployment {
    padding: 80px 0;
}

.deployment-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.deployment-item {
    display: flex;
    align-items: center;
    padding: 1.5rem;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
}

.deployment-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.deployment-item i {
    font-size: 1.5rem;
    color: #2563eb;
    margin-right: 1rem;
    min-width: 24px;
}

/* Pricing Section */
.pricing {
    padding: 80px 0;
    background: #f8fafc;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(4,1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.pricing-card {
    background: white;
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
    position: relative;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.pricing-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.pricing-card.featured {
    border: 2px solid #2563eb;
    transform: scale(1.05);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    color: white;
    padding: 6px 20px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.pricing-header {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid #e2e8f0;
}

.pricing-header h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1e293b;
}

.pricing-tagline {
    font-size: 0.9rem;
    color: #64748b;
    font-weight: 500;
    margin-top: 0.5rem;
    padding: 0.5rem 1rem;
    background: #f1f5f9;
    border-radius: 20px;
    display: inline-block;
}

.pricing-spec {
    font-size: 0.8rem;
    color: #94a3b8;
    margin-top: 0.5rem;
    font-weight: 500;
}

.pricing-guide {
    text-align: center;
    margin: 2rem 0;
    padding: 1rem;
    background: #f8fafc;
    border-radius: 12px;
    border: 1px solid #e2e8f0;
}

.pricing-guide p {
    margin: 0;
    color: #64748b;
    font-size: 0.9rem;
}

.pricing-card.enterprise {
    border: 2px solid #8b5cf6;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
}

.price-contact {
    font-size: 1.5rem;
    font-weight: 700;
    color: #8b5cf6;
    background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.25rem;
}

.currency {
    font-size: 1.25rem;
    color: #64748b;
}

.amount {
    font-size: 3rem;
    font-weight: 700;
    color: #1e293b;
}

.period {
    font-size: 1rem;
    color: #64748b;
}

.pricing-features {
    margin-bottom: 2rem;
    flex-grow: 1;
}

.pricing-features .feature-item {
    display: flex;
    align-items: center;
    padding: 0.75rem 0;
    background: none;
    box-shadow: none;
    border: none;
    padding: 0.5rem 0;
}

.pricing-features .feature-item i {
    color: #10b981;
    margin-right: 0.75rem;
    font-size: 0.9rem;
}

.pricing-features .feature-item span {
    color: #64748b;
    font-size: 0.9rem;
}

.pricing-header {
    /* この数値はデザインを見ながら微調整してください */
    min-height: 240px; 
}

.price, .price-contact {
    /* この数値は最も背の高い価格表示に合わせて調整してください */
    min-height: 80px; 
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: row; /* .price内の要素を横並びに戻す */
}

.pricing-tagline {
    /* 2行になる可能性も考慮した高さを設定 */
    min-height: 54px; 
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.pricing-spec {
    min-height: 30px;
}

/* FAQ Section */
.faq {
    padding: 80px 0;
    background: #f8fafc;
}

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

.faq-item {
    background: white;
    border-radius: 12px;
    margin-bottom: 1rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
    overflow: hidden;
}

.faq-item summary {
    padding: 1.5rem;
    font-weight: 600;
    color: #1e293b;
    cursor: pointer;
    list-style: none;
    position: relative;
    transition: background-color 0.3s ease;
}

.faq-item summary:hover {
    background: #f8fafc;
}

.faq-item summary::after {
    content: '+';
    position: absolute;
    right: 1.5rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.5rem;
    color: #2563eb;
    transition: transform 0.3s ease;
}

.faq-item[open] summary::after {
    transform: translateY(-50%) rotate(45deg);
}

.faq-content {
    padding: 0 1.5rem 1.5rem;
    color: #64748b;
    line-height: 1.6;
}

.faq-content p {
    margin: 0;
}

/* Case Studies Section */
.cases {
    padding: 80px 0;
    background: #f8fafc;
}

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

.case-item {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
}

.case-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.case-metric {
    font-size: 2rem;
    font-weight: 700;
    color: #059669;
    margin-bottom: 1rem;
    text-align: center;
}

.case-description h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1e293b;
}

.case-description p {
    color: #64748b;
    line-height: 1.6;
}

/* Security Section */
.security {
    padding: 80px 0;
    background: white;
}

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

.security-item {
    background: #f8fafc;
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
}

.security-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.security-item h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: #1e293b;
    display: flex;
    align-items: center;
}

.security-item h3::before {
    content: '🔒';
    margin-right: 0.5rem;
    font-size: 1.2rem;
}

.security-item ul {
    list-style: none;
    padding: 0;
}

.security-item li {
    padding: 0.5rem 0;
    color: #64748b;
    position: relative;
    padding-left: 1.5rem;
}

.security-item li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #059669;
    font-weight: bold;
}


/* Future Vision Section */
.future-vision {
    padding: 80px 0;
}

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

.vision-item {
    display: flex;
    align-items: flex-start;
    padding: 1.5rem;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
}

.vision-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.vision-item i {
    color: #10b981;
    margin-right: 1rem;
    margin-top: 0.25rem;
    font-size: 1.2rem;
    min-width: 20px;
}

/* CTA Section */
.cta {
    padding: 80px 0;
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    color: white;
    text-align: center;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.cta .btn-primary {
    background: white;
    color: #2563eb;
}

.cta .btn-primary:hover {
    background: #f8fafc;
}

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

.cta .btn-secondary:hover {
    background: white;
    color: #2563eb;
}

/* 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 {
    margin-bottom: 1rem;
    color: #667eea;
}

.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;
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #2563eb, #7c3aed);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
    transition: all 0.3s ease;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    z-index: 1000;
}

.back-to-top:hover {
    transform: translateY(-2px) scale(1.1);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.4);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:active {
    transform: translateY(0) scale(0.95);
}

/* 移动端适配 */
@media (max-width: 768px) {
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
        font-size: 1.1rem;
    }
}

@media (max-width: 480px) {
    .back-to-top {
        bottom: 15px;
        right: 15px;
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    /* Prevent horizontal scroll */
    body {
        overflow-x: hidden;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding: 2rem 0;
        transition: left 0.3s ease;
        z-index: 1000;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu li {
        margin: 1rem 0;
    }
    
    .nav-menu a {
        font-size: 1.2rem;
        padding: 0.5rem 1rem;
        display: block;
        text-align: center;
        min-width: 200px;
    }
    
    .nav-cta {
        display: none;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
        line-height: 1.3;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
        margin-bottom: 2rem;
    }
    
    .hero-cta {
        justify-content: center;
        flex-direction: column;
        gap: 1rem;
    }
    
    .hero-cta .btn {
        width: 100%;
        max-width: 280px;
        padding: 14px 24px;
    }
    
    .dashboard-preview {
        max-width: 100%;
        margin-top: 2rem;
    }
    
    .dashboard-content {
        grid-template-columns: 1fr;
        gap: 0.8rem;
    }
    
    .metric-card {
        padding: 1.5rem 1rem;
    }
    
    .metric-value {
        font-size: 1.8rem;
    }
    
    .section-title {
        font-size: 2rem;
        line-height: 1.3;
    }
    
    .section-description {
        font-size: 1rem;
        line-height: 1.6;
    }
    
    .value-features {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .features-grid-compact {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .steps-container {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .step {
        flex-direction: column;
        text-align: center;
        padding: 1.5rem;
    }
    
    .step-number {
        margin-right: 0;
        margin-bottom: 1rem;
    }
    
    .cases-grid,
    .security-content {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .features-grid,
    .features-grid-large,
    .characteristics-grid,
    .benefits-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .pricing-card.featured {
        transform: none;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }
    
    .cta .btn {
        width: 100%;
        max-width: 300px;
        padding: 16px 24px;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 2rem;
        text-align: center;
    }
    
    .footer-content div {
        max-width: 100%;
    }
    
    .comparison-table {
        font-size: 0.9rem;
    }
    
    .comparison-table th,
    .comparison-table td {
        padding: 1rem 0.8rem;
    }
    
    /* Improve touch targets for mobile */
    .nav-menu a,
    .faq-item summary,
    .btn {
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    /* Better spacing for mobile */
    .container {
        padding: 0 20px;
    }
    
    /* Improve text readability on mobile */
    p, li {
        line-height: 1.6;
    }
    
    /* Better mobile form elements */
    input, select, textarea {
        font-size: 16px; /* Prevent zoom on iOS */
        min-height: 44px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .nav-container {
        padding: 0 15px;
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero-title {
        font-size: 2rem;
        line-height: 1.2;
    }
    
    .hero-subtitle {
        font-size: 1rem;
        line-height: 1.5;
    }
    
    .section-title {
        font-size: 1.75rem;
        line-height: 1.2;
    }
    
    .section-description {
        font-size: 0.95rem;
    }
    
    .pricing-card.featured {
        transform: none;
    }
    
    .btn {
        padding: 12px 20px;
        font-size: 14px;
    }
    
    .btn-large {
        padding: 14px 28px;
        font-size: 15px;
    }
    
    .metric-value {
        font-size: 1.5rem;
    }
    
    .metric-label {
        font-size: 0.75rem;
    }
    
    .dashboard-preview {
        padding: 1.5rem;
    }
    
    .value-item,
    .feature-compact,
    .characteristic-item,
    .benefit-card,
    .case-item,
    .security-item {
        padding: 1.5rem;
    }
    
    .step {
        padding: 1.25rem;
    }
    
    .step-number {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
    }
    
    .comparison-table {
        font-size: 0.8rem;
    }
    
    .comparison-table th,
    .comparison-table td {
        padding: 0.8rem 0.6rem;
    }
    
    .pricing-card {
        padding: 1.5rem;
    }
    
    .pricing-header {
        min-height: 200px;
    }
    
    .price {
        min-height: 60px;
    }
    
    .amount {
        font-size: 2.5rem;
    }
    
    .cta-title {
        font-size: 2rem;
    }
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

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

.feature-card,
.feature-item,
.characteristic-item,
.benefit-card,
.pricing-card {
    animation: fadeInUp 0.6s ease-out;
}