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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #1a1a1a;
    background: #ffffff;
    font-size: 16px;
}

.container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 24px;
    overflow: hidden;
    box-sizing: border-box;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid #e1e5e9;
    z-index: 1000;
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

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

.brand-title {
    font-size: 18px;
    font-weight: 600;
    color: #1a1a1a;
    margin: 0;
}

.brand-subtitle {
    font-size: 12px;
    color: #6b7280;
    margin-left: 8px;
    padding: 2px 6px;
    background: #f3f4f6;
    border-radius: 4px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: #4b5563;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s ease;
}

.nav-link:hover,
.nav-link.active {
    color: #1a1a1a;
}

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

.nav-toggle span {
    width: 20px;
    height: 2px;
    background: #1a1a1a;
    transition: 0.3s;
}

/* Hero Section */
.intro {
    padding: 120px 0 80px;
    background: #ffffff;
}

.intro-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.service-badge {
    display: inline-block;
    padding: 8px 16px;
    background: #f3f4f6;
    color: #4b5563;
    font-size: 14px;
    font-weight: 500;
    border-radius: 20px;
    margin-bottom: 16px;
}

.mobile-notice {
    display: block;
    padding: 12px 20px;
    background: #fef3c7;
    color: #92400e;
    font-size: 14px;
    font-weight: 500;
    border-radius: 8px;
    margin: 0 auto 24px auto;
    border: 1px solid #f59e0b;
    text-align: center;
    max-width: fit-content;
}

.intro-title {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.1;
    color: #1a1a1a;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.intro-description {
    font-size: 18px;
    line-height: 1.6;
    color: #4b5563;
    margin-bottom: 32px;
}

.intro-demo {
    margin: 32px 0;
}

.demo-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    padding: 24px;
    background: #fafbfc;
    border-radius: 12px;
    border: 1px solid #e1e5e9;
}

.demo-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.demo-icon {
    font-size: 32px;
    line-height: 1;
}

.demo-text {
    font-size: 14px;
    font-weight: 500;
    color: #4b5563;
}

.demo-arrow {
    font-size: 20px;
    color: #9ca3af;
    font-weight: 600;
}

.intro-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-bottom: 48px;
}

/* Product Showcase */
.product-showcase {
    position: relative;
    max-width: 900px;
    width: 100%;
    margin: 32px auto;
    overflow: hidden;
    box-sizing: border-box;
}

.product-image {
    width: 100%;
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    border: 1px solid #e1e5e9;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    object-fit: contain;
    display: block;
    box-sizing: border-box;
}

.product-image:hover {
    transform: translateY(-4px);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
}

.product-caption {
    text-align: center;
    margin-top: 16px;
    font-size: 14px;
    color: #6b7280;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.caption-badge {
    background: #1a1a1a;
    color: #ffffff;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 20px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s ease;
    border: none;
    cursor: pointer;
    white-space: nowrap;
}

.btn-primary {
    background: #1a1a1a;
    color: #ffffff;
}

.btn-primary:hover {
    background: #2a2a2a;
}

.btn-secondary {
    background: #ffffff;
    color: #1a1a1a;
    border: 1px solid #e1e5e9;
}

.btn-secondary:hover {
    border-color: #d1d5db;
    background: #f9fafb;
}

.btn-large {
    padding: 16px 24px;
    font-size: 16px;
}

/* Stats */
.intro-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
    padding: 32px 0;
    border-top: 1px solid #f3f4f6;
}

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

.stat-number {
    font-size: 20px;
    font-weight: 600;
    color: #1a1a1a;
    margin-bottom: 4px;
}

.stat-label {
    font-size: 14px;
    color: #6b7280;
}

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

.section-title {
    font-size: 32px;
    font-weight: 700;
    text-align: center;
    color: #1a1a1a;
    margin-bottom: 48px;
    letter-spacing: -0.01em;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.feature-card {
    background: #ffffff;
    padding: 24px;
    border-radius: 12px;
    border: 1px solid #e1e5e9;
}

.feature-icon {
    font-size: 20px;
    margin-bottom: 12px;
    display: block;
}

.feature-title {
    font-size: 16px;
    font-weight: 600;
    color: #1a1a1a;
    margin-bottom: 8px;
}

.feature-description {
    font-size: 14px;
    line-height: 1.5;
    color: #6b7280;
}

/* How to Use Section */
.how-to-use {
    padding: 80px 0;
    background: #ffffff;
}

/* Service Demo */
.service-demo {
    text-align: center;
    margin-bottom: 48px;
}

.service-image {
    width: 100%;
    max-width: 800px;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.1);
    border: 1px solid #e1e5e9;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.service-image:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.service-caption {
    margin-top: 16px;
    font-size: 14px;
    color: #6b7280;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.usage-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    margin-top: 32px;
}

.usage-subtitle {
    font-size: 20px;
    font-weight: 600;
    color: #1a1a1a;
    margin-bottom: 24px;
}

.steps {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.step {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 16px;
    background: #ffffff;
    border: 1px solid #f3f4f6;
    border-radius: 8px;
}

.step-number {
    width: 24px;
    height: 24px;
    background: #1a1a1a;
    color: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 600;
    flex-shrink: 0;
    margin-top: 2px;
}

.step-content {
    flex: 1;
}

.step-title {
    font-size: 14px;
    font-weight: 600;
    color: #1a1a1a;
    margin-bottom: 4px;
}

.step-description {
    font-size: 14px;
    line-height: 1.5;
    color: #6b7280;
}

/* Detail Items */
.detail-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.detail-item {
    padding: 16px;
    background: #ffffff;
    border: 1px solid #f3f4f6;
    border-radius: 8px;
}

.detail-title {
    font-size: 14px;
    font-weight: 600;
    color: #1a1a1a;
    margin-bottom: 4px;
}

.detail-description {
    font-size: 14px;
    line-height: 1.5;
    color: #6b7280;
}

/* CTA Section */
.cta {
    padding: 80px 0;
    background: #1a1a1a;
    color: #ffffff;
    text-align: center;
}

.cta-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
}

.cta-description {
    font-size: 16px;
    color: #9ca3af;
    margin-bottom: 32px;
}

.cta .btn-primary {
    background: #ffffff;
    color: #1a1a1a;
}

.cta .btn-primary:hover {
    background: #f3f4f6;
}

/* App Section */
.app-section {
    padding: 80px 0;
    background: #fafbfc;
}

.app-header {
    text-align: center;
    margin-bottom: 48px;
}

.app-title {
    font-size: 32px;
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 16px;
}

.app-description {
    font-size: 16px;
    color: #6b7280;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* Page Header */
.page-header {
    padding: 120px 0 48px;
    background: #ffffff;
    text-align: center;
}

.page-title {
    font-size: 40px;
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 16px;
    letter-spacing: -0.01em;
}

.page-description {
    font-size: 18px;
    color: #6b7280;
    max-width: 600px;
    margin: 0 auto;
}

/* About Section */
.about {
    padding: 80px 0;
    background: #ffffff;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    margin-top: 32px;
}

.about-subtitle {
    font-size: 20px;
    font-weight: 600;
    color: #1a1a1a;
    margin-bottom: 16px;
}

.about-description {
    font-size: 16px;
    line-height: 1.6;
    color: #4b5563;
    margin-bottom: 24px;
}

.about-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.about-features li {
    font-size: 14px;
    color: #6b7280;
    display: flex;
    align-items: center;
    gap: 8px;
}

.company-info {
    padding: 24px;
    background: #fafbfc;
    border-radius: 12px;
    border: 1px solid #e1e5e9;
}

.company-name {
    font-size: 18px;
    font-weight: 600;
    color: #1a1a1a;
    margin-bottom: 12px;
}

.company-description {
    font-size: 14px;
    line-height: 1.6;
    color: #6b7280;
    margin-bottom: 16px;
}

.company-details {
    font-size: 13px;
    line-height: 1.5;
    color: #9ca3af;
}

.company-details p {
    margin-bottom: 4px;
}

/* Contact Section */
.contact-section {
    margin-top: 48px;
    text-align: center;
}

.contact-description {
    font-size: 16px;
    color: #6b7280;
    margin-bottom: 24px;
    line-height: 1.6;
}

.contact-info {
    display: flex;
    justify-content: center;
    gap: 32px;
}

.contact-item {
    font-size: 14px;
    color: #4b5563;
}

.contact-item a {
    color: #1a1a1a;
    text-decoration: none;
}

.contact-item a:hover {
    text-decoration: underline;
}

/* Footer */
.footer {
    background: #fafbfc;
    border-top: 1px solid #e1e5e9;
    padding: 48px 0 24px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 48px;
    margin-bottom: 32px;
}

.footer-title {
    font-size: 16px;
    font-weight: 600;
    color: #1a1a1a;
    margin-bottom: 8px;
}

.footer-description {
    font-size: 14px;
    color: #6b7280;
    line-height: 1.5;
}

.footer-section-title {
    font-size: 14px;
    font-weight: 600;
    color: #1a1a1a;
    margin-bottom: 12px;
}

.footer-nav {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-link {
    color: #6b7280;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s ease;
}

.footer-link:hover {
    color: #1a1a1a;
}

.footer-bottom {
    border-top: 1px solid #e1e5e9;
    padding-top: 16px;
    text-align: center;
}

.footer-bottom p {
    font-size: 13px;
    color: #9ca3af;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(12px);
        border-bottom: 1px solid #e1e5e9;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-links {
        flex-direction: column;
        gap: 0;
        padding: 24px 0;
    }
    
    .nav-links li {
        width: 100%;
        text-align: center;
    }
    
    .nav-link {
        display: block;
        padding: 12px 24px;
        width: 100%;
    }
    
    .intro {
        padding: 100px 0 60px;
    }
    
    .intro-content {
        text-align: center;
    }
    
    .intro-title {
        font-size: 36px;
    }
    
    .intro-description {
        font-size: 16px;
    }
    
    .intro-buttons {
        flex-direction: column;
        align-items: center;
        justify-content: center;
    }
    
    .intro-stats {
        gap: 24px;
    }
    
    .product-showcase {
        max-width: 100%;
        margin: 24px auto;
        overflow: hidden;
    }
    
    .product-image {
        border-radius: 8px;
        max-width: 100%;
    }
    
    .service-image {
        max-width: 100%;
        border-radius: 8px;
    }
    
    .service-demo {
        margin-bottom: 32px;
    }
    
    .demo-flow {
        flex-direction: column;
        gap: 12px;
        padding: 20px;
    }
    
    .demo-arrow {
        transform: rotate(90deg);
        font-size: 16px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .page-title {
        font-size: 32px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .usage-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
        text-align: center;
    }
    
    .contact-info {
        flex-direction: column;
        gap: 16px;
    }
}