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

:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #f1f5f9;
    --accent-color: #06b6d4;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
    --background: #ffffff;
    --background-secondary: #f8fafc;
    --background-dark: #0f172a;
    --border-color: #e2e8f0;
    --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);
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --gradient-secondary: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
    --gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

html {
    scroll-behavior: smooth;
}

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

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

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

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    font-size: 16px;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    outline: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

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

.btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    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 h2 {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 24px;
    font-weight: 700;
}

.nav-menu {
    display: flex;
    gap: 32px;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 16px;
    transition: color 0.3s ease;
}

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

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

.bar {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    margin: 3px 0;
    transition: 0.3s;
    border-radius: 2px;
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 200%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
    z-index: 1;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 2;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 24px;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.6;
}

.hero-cta {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}

.hero-stats {
    display: flex;
    gap: 48px;
}

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

.stat-number {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 4px;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 14px;
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.phone-mockup {
    position: relative;
    max-width: 300px;
    width: 100%;
}

.phone-screen {
    width: 100%;
    height: auto;
    border-radius: 24px;
    box-shadow: var(--shadow-xl);
    transition: transform 0.3s ease;
}

.phone-screen:hover {
    transform: scale(1.05);
}

.mockup-badge {
    position: absolute;
    top: -10px;
    right: -10px;
    background: var(--gradient-primary);
    color: white;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    box-shadow: var(--shadow-md);
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Features Section */
.features {
    padding: 80px 0;
    background: var(--background);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 32px;
}

.feature-card {
    background: var(--background);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px;
    text-align: left;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.feature-card.featured {
    border: 2px solid var(--primary-color);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.feature-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    background: var(--gradient-primary);
    color: white;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

.feature-icon {
    width: 64px;
    height: 64px;
    background: var(--gradient-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    color: white;
}

.feature-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 16px;
}

.feature-description {
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.6;
}

.feature-list {
    list-style: none;
    margin-bottom: 20px;
}

.feature-list li {
    position: relative;
    padding-left: 24px;
    margin-bottom: 8px;
    color: var(--text-secondary);
}

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 600;
}

.feature-preview {
    padding: 12px 16px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
}

.feature-preview span {
    color: var(--primary-color);
    font-weight: 500;
    font-size: 14px;
}

/* Showcase Section */
.showcase {
    padding: 80px 0;
    background: var(--background-secondary);
}

/* Demo Highlight */
.demo-highlight {
    margin-bottom: 80px;
    background: var(--background);
    border-radius: 24px;
    padding: 48px;
    box-shadow: var(--shadow-lg);
}

.demo-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.demo-content.reverse {
    grid-template-columns: 1fr 1fr;
}

.demo-content.reverse .demo-image {
    order: 1;
}

.demo-content.reverse .demo-text {
    order: 2;
}

.demo-text h3 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.demo-text p {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 32px;
}

.demo-stats {
    display: flex;
    gap: 32px;
    margin-bottom: 32px;
}

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

.demo-stat .stat-number {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    display: block;
}

.demo-stat .stat-label {
    font-size: 14px;
    color: var(--text-secondary);
}

.feature-highlights {
    display: flex;
    gap: 12px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.highlight-tag {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    border: 1px solid rgba(99, 102, 241, 0.2);
}

.demo-cta {
    display: inline-flex;
    align-items: center;
    padding: 14px 28px;
    background: var(--gradient-primary);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s ease;
}

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

.demo-image {
    position: relative;
}

.demo-image img {
    width: 100%;
    height: auto;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
}

.demo-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    background: var(--gradient-success);
    color: white;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.demo-badge.success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.demo-badge.analytics {
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
}

.demo-badge.hot {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.demo-badge.vip {
    background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
}

/* Showcase Grid */
.showcase-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
    margin-bottom: 80px;
}

.showcase-item {
    background: var(--background);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

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

.showcase-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
    position: relative;
}

.showcase-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.showcase-item:hover .showcase-image img {
    transform: scale(1.1);
}

.image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(99, 102, 241, 0.8), rgba(139, 92, 246, 0.8));
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.showcase-item:hover .image-overlay {
    opacity: 1;
}

.overlay-content {
    text-align: center;
    color: white;
}

.overlay-content h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.overlay-content p {
    font-size: 14px;
    opacity: 0.9;
}

.showcase-content {
    padding: 24px;
}

.showcase-content h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.showcase-content p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
}

.feature-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.tag {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

/* Success Cases */
.success-cases {
    background: var(--background);
    padding: 48px;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
}

.success-cases h3 {
    font-size: 28px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 40px;
}

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

.case-item {
    display: flex;
    gap: 16px;
    padding: 24px;
    background: var(--background-secondary);
    border-radius: 12px;
    transition: transform 0.3s ease;
}

.case-item:hover {
    transform: translateY(-4px);
}

.case-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}

.case-content h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
}

.case-content p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.5;
    margin-bottom: 12px;
}

.case-result {
    font-size: 14px;
    color: var(--primary-color);
    font-weight: 500;
}

/* Advantages Section */
.advantages {
    padding: 80px 0;
    background: var(--background);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
}

.advantage-item {
    text-align: center;
    padding: 32px 24px;
    border-radius: 16px;
    transition: all 0.3s ease;
}

.advantage-item:hover {
    background: var(--background-secondary);
    transform: translateY(-4px);
}

.advantage-icon {
    font-size: 48px;
    margin-bottom: 24px;
    display: block;
}

.advantage-item h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 16px;
}

.advantage-item p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Download Section */
.download {
    padding: 80px 0;
    background: var(--gradient-primary);
    color: white;
}

.download-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    align-items: center;
}

.download-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 24px;
    color: white;
}

.download-subtitle {
    font-size: 18px;
    margin-bottom: 32px;
    opacity: 0.9;
    line-height: 1.6;
}

.download-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 32px;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 24px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.download-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.btn-icon {
    font-size: 24px;
}

.btn-title {
    font-weight: 600;
    font-size: 16px;
}

.btn-subtitle {
    font-size: 14px;
    opacity: 0.8;
}

.download-features {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: white;
    font-size: 14px;
}

.feature-item .icon {
    font-size: 16px;
}

.download-qr {
    display: flex;
    justify-content: center;
    align-items: center;
}

.qr-code {
    text-align: center;
}

.qr-placeholder {
    width: 160px;
    height: 160px;
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    backdrop-filter: blur(10px);
}

.qr-code p {
    color: white;
    opacity: 0.9;
}

/* Footer */
.footer {
    background: var(--background-dark);
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-info h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 16px;
    color: white;
}

.footer-info p {
    color: var(--text-light);
    margin-bottom: 24px;
}

.contact-info p {
    margin-bottom: 8px;
    color: var(--text-light);
}

.social-links {
    display: flex;
    gap: 16px;
    margin-top: 16px;
}

.social-link {
    color: var(--text-light);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

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

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.link-group h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
    color: white;
}

.link-group a {
    display: block;
    color: var(--text-light);
    text-decoration: none;
    margin-bottom: 8px;
    transition: color 0.3s ease;
}

.link-group a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-light);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-content,
    .download-content,
    .demo-content,
    .demo-content.reverse {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .demo-content.reverse .demo-image,
    .demo-content.reverse .demo-text {
        order: unset;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }

    .demo-stats {
        justify-content: center;
    }

    .feature-highlights {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--background);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-md);
        padding: 20px 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .hero-title {
        font-size: 32px;
    }

    .section-title {
        font-size: 28px;
    }

    .hero-stats {
        flex-direction: column;
        gap: 24px;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .download-buttons {
        flex-direction: column;
    }

    .download-features {
        justify-content: center;
    }

    .demo-stats {
        flex-direction: column;
        gap: 16px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }

    .footer-links {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .features-grid,
    .showcase-grid,
    .advantages-grid,
    .cases-grid {
        grid-template-columns: 1fr;
    }

    .demo-highlight {
        padding: 32px 24px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero {
        padding: 100px 0 60px;
    }

    .hero-title {
        font-size: 28px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .section-title {
        font-size: 24px;
    }

    .feature-card,
    .showcase-item,
    .advantage-item {
        margin: 0 16px;
    }

    .features,
    .showcase,
    .advantages,
    .download {
        padding: 60px 0;
    }

    .demo-text h3 {
        font-size: 24px;
    }

    .demo-text p {
        font-size: 16px;
    }
}

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

.hero-content,
.feature-card,
.showcase-item,
.advantage-item,
.demo-highlight {
    animation: fadeInUp 0.6s ease-out;
}

/* Smooth scrolling and performance */
* {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
}

/* Focus states for accessibility */
.btn:focus,
.nav-link:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

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