/* CSS Variables */
:root {
    --bg-primary: #0A0F1D;
    --bg-secondary: #0F1629;
    --bg-card: #141B2D;
    --bg-card-hover: #1A2340;
    --text-primary: #FFFFFF;
    --text-secondary: #A3B1C6; /* Improved contrast: 4.5:1 (WCAG AA) */
    --text-muted: #7A8599; /* Improved contrast for decorative text */
    --accent-primary: #00F5D4;
    --accent-secondary: #00E0FF;
    --accent-gradient: linear-gradient(135deg, #00F5D4 0%, #00E0FF 100%);
    --border-color: #1E2942;
    --critical: #FF4757;
    --warning: #FFA502;
    --info: #00E0FF;
    --font-display: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --focus-ring: 0 0 0 3px rgba(0, 245, 212, 0.4);
}

/* Accessibility: Focus Styles */
*:focus {
    outline: none;
}

*:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
    box-shadow: var(--focus-ring);
}

/* Accessibility: Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 15, 29, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.25rem;
}

.logo-icon {
    color: var(--accent-primary);
    font-size: 1.5rem;
}

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

.nav-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

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

.lang-switch {
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    transition: all 0.2s ease;
}

.lang-switch:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary) !important;
}

.nav-cta {
    background: var(--accent-gradient);
    color: var(--bg-primary) !important;
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 600;
}

.nav-cta:hover {
    opacity: 0.9;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: 0.3s;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 120px 24px 80px;
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    opacity: 0.3;
    background: 
        radial-gradient(ellipse at 50% 0%, rgba(0, 245, 212, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 50%, rgba(0, 224, 255, 0.1) 0%, transparent 40%);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

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

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--accent-gradient);
    color: var(--bg-primary);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 40px rgba(0, 245, 212, 0.3);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-primary);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    width: 100%;
    justify-content: center;
}

.btn-outline:hover {
    border-color: var(--accent-primary);
    background: rgba(0, 245, 212, 0.05);
}

.btn-large {
    padding: 18px 36px;
    font-size: 1.1rem;
}

/* Hero Stats */
.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-primary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Section Styles */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    background: rgba(0, 245, 212, 0.1);
    color: var(--accent-primary);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 20px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 16px;
}

.section-desc {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 500px;
    margin: 0 auto;
}

/* Features Section */
.features {
    background: var(--bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px;
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-primary);
    box-shadow: 0 20px 60px rgba(0, 245, 212, 0.1);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: rgba(0, 245, 212, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--accent-primary);
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* Demo Section */
.demo-window {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    max-width: 1000px;
    margin: 0 auto;
}

.window-header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.window-dots {
    display: flex;
    gap: 8px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.red { background: #FF5F57; }
.dot.yellow { background: #FFBD2E; }
.dot.green { background: #28CA41; }

.window-title {
    color: var(--text-muted);
    font-size: 0.85rem;
    font-family: var(--font-mono);
}

.demo-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
}

.code-section {
    border-right: 1px solid var(--border-color);
}

.code-block {
    padding: 0;
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    background: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid var(--border-color);
}

.file-name {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.line-badge {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent-primary);
    background: rgba(0, 245, 212, 0.1);
    padding: 4px 8px;
    border-radius: 4px;
}

.code {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    line-height: 1.8;
    padding: 20px;
    overflow-x: auto;
    margin: 0;
    background: transparent;
}

.code code {
    display: block;
}

.line-num {
    color: var(--text-muted);
    margin-right: 20px;
    user-select: none;
}

.keyword { color: #C792EA; }
.function { color: #82AAFF; }
.string { color: #C3E88D; }
.comment { color: #546E7A; }
.number { color: #F78C6C; }

.highlight-line {
    background: rgba(255, 71, 87, 0.15);
    margin-left: -20px;
    margin-right: -20px;
    padding-left: 20px;
    display: inline-block;
    width: calc(100% + 40px);
}

.highlight-line-warn {
    background: rgba(255, 165, 2, 0.1);
}

.highlight-line-info {
    background: rgba(0, 224, 255, 0.1);
}

.ai-comments {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.ai-comment {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 16px;
    border-left: 3px solid;
}

.ai-comment.critical { border-color: var(--critical); }
.ai-comment.warning { border-color: var(--warning); }
.ai-comment.info { border-color: var(--info); }

.comment-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.comment-icon {
    font-size: 1rem;
}

.severity {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 4px 8px;
    border-radius: 4px;
}

.severity.critical { background: rgba(255, 71, 87, 0.2); color: var(--critical); }
.severity.warning { background: rgba(255, 165, 2, 0.2); color: var(--warning); }
.severity.info { background: rgba(0, 224, 255, 0.2); color: var(--info); }

.comment-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.comment-text strong {
    color: var(--text-primary);
}

.suggestion {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 6px;
    padding: 12px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    overflow-x: auto;
    margin-top: 10px;
}

.suggestion code {
    color: var(--accent-primary);
}

/* How It Works */
.how-it-works {
    background: var(--bg-secondary);
}

.steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.step {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px;
    max-width: 300px;
}

.step-number {
    width: 48px;
    height: 48px;
    background: var(--accent-gradient);
    color: var(--bg-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.step-content h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.step-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.step-connector {
    width: 40px;
    height: 2px;
    background: var(--border-color);
}

/* Social Proof */
.social-proof {
    text-align: center;
}

.trust-text {
    color: var(--text-muted);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 30px;
}

.logo-wall {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 48px;
    flex-wrap: wrap;
    margin-bottom: 60px;
    opacity: 0.5;
}

.company-logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-secondary);
}

.testimonial {
    max-width: 700px;
    margin: 0 auto;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 40px;
}

.testimonial blockquote {
    font-size: 1.25rem;
    line-height: 1.7;
    color: var(--text-primary);
    margin-bottom: 24px;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
}

.author-avatar {
    width: 48px;
    height: 48px;
    background: var(--accent-gradient);
    color: var(--bg-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

.author-info {
    text-align: left;
}

.author-name {
    display: block;
    font-weight: 600;
}

.author-title {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Architecture Section */
.architecture {
    background: var(--bg-primary);
}

.arch-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    max-width: 900px;
    margin: 0 auto;
}

.arch-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    text-align: center;
    transition: all 0.3s ease;
}

.arch-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

.arch-icon {
    width: 48px;
    height: 48px;
    background: rgba(0, 245, 212, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    color: var(--accent-primary);
}

.arch-card h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.arch-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* Pricing */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 40px 32px;
    position: relative;
    transition: all 0.3s ease;
}

.pricing-card:hover {
    transform: translateY(-4px);
}

.pricing-card.popular {
    border-color: var(--accent-primary);
    box-shadow: 0 0 60px rgba(0, 245, 212, 0.15);
}

.popular-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent-gradient);
    color: var(--bg-primary);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.pricing-header {
    text-align: center;
    margin-bottom: 32px;
}

.pricing-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 4px;
}

.price .amount {
    font-size: 2.5rem;
    font-weight: 700;
}

.price .period {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.pricing-features {
    margin-bottom: 32px;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.95rem;
}

.pricing-features li:last-child {
    border-bottom: none;
}

.pricing-features .check {
    color: var(--accent-primary);
    font-weight: 700;
}

.pricing-features .x {
    color: var(--text-muted);
}

.pricing-features li.disabled {
    color: var(--text-muted);
}

/* CTA Section */
.cta {
    text-align: center;
    background: var(--bg-secondary);
    padding: 100px 24px;
}

.cta h2 {
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 700;
    margin-bottom: 16px;
}

.cta p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 32px;
}

/* Footer */
.footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: 80px 0 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 60px;
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 16px 0 24px;
    max-width: 280px;
}

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

.social-links a {
    width: 40px;
    height: 40px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.social-links a:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.footer-links h4 {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--accent-primary);
}

.footer-bottom {
    text-align: center;
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 1024px) {
    .demo-content {
        grid-template-columns: 1fr;
    }
    
    .code-section {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero-stats {
        gap: 32px;
    }
    
    .steps {
        flex-direction: column;
    }
    
    .step-connector {
        width: 2px;
        height: 30px;
    }
    
    .step {
        max-width: 100%;
        width: 100%;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}

@media (max-width: 480px) {
    .hero-cta {
        flex-direction: column;
        align-items: stretch;
    }
    
    .btn {
        justify-content: center;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
}

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

.hero-content {
    animation: fadeInUp 0.8s ease-out;
}

.feature-card {
    opacity: 0;
    animation: fadeInUp 0.6s ease-out forwards;
}

.feature-card:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2) { animation-delay: 0.2s; }
.feature-card:nth-child(3) { animation-delay: 0.3s; }
.feature-card:nth-child(4) { animation-delay: 0.4s; }

/* ============================================
   转化率优化新增样式
   ============================================ */

/* Hero 优化样式 */
.hero-problem-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 165, 2, 0.15);
    color: var(--warning);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 24px;
}

.hero-problem-tag svg {
    width: 16px;
    height: 16px;
}

.highlight-number {
    color: var(--accent-primary);
    font-weight: 700;
}

.hero-benefits {
    display: flex;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
    margin-bottom: 32px;
}

.benefit-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.benefit-item svg {
    color: var(--accent-primary);
    width: 18px;
    height: 18px;
}

.cta-note {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 12px;
}

.stat-compare {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* 痛点展示区 */
.pain-points {
    background: var(--bg-secondary);
}

.section-tag.pain {
    background: rgba(255, 71, 87, 0.15);
    color: var(--critical);
}

.pain-points-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.pain-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--critical);
    border-radius: 16px;
    padding: 32px;
    transition: all 0.3s ease;
}

.pain-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(255, 71, 87, 0.1);
}

.pain-icon {
    width: 56px;
    height: 56px;
    background: rgba(255, 71, 87, 0.1);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--critical);
}

.pain-card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.pain-scenario {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
    margin-bottom: 20px;
}

.pain-stat {
    background: rgba(255, 71, 87, 0.08);
    padding: 16px;
    border-radius: 10px;
}

.pain-number {
    display: block;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--critical);
}

.pain-label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* 痛点→解决方案对照区 */
.solutions-compare {
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.section-tag.solution {
    background: rgba(0, 245, 212, 0.15);
    color: var(--accent-primary);
}

.compare-grid {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.compare-row {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 24px;
    align-items: center;
}

.compare-problem,
.compare-solution {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 28px;
}

.compare-problem {
    border-left: 4px solid var(--critical);
}

.compare-solution {
    border-left: 4px solid var(--accent-primary);
    box-shadow: 0 0 40px rgba(0, 245, 212, 0.08);
}

.problem-badge,
.solution-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.problem-badge {
    background: rgba(255, 71, 87, 0.15);
    color: var(--critical);
}

.solution-badge {
    background: rgba(0, 245, 212, 0.15);
    color: var(--accent-primary);
}

.compare-problem h3,
.compare-solution h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.compare-problem p,
.compare-solution p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

.compare-arrow {
    color: var(--text-muted);
    font-size: 1.5rem;
}

.compare-arrow svg {
    width: 32px;
    height: 32px;
    animation: arrow-pulse 2s infinite;
}

@keyframes arrow-pulse {
    0%, 100% { transform: translateX(0); opacity: 0.5; }
    50% { transform: translateX(8px); opacity: 1; }
}

.solution-result {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(0, 245, 212, 0.1);
    padding: 10px 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.result-icon {
    font-size: 1rem;
}

.result-text {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent-primary);
}

/* 竞品对比表格 */
.competitor-comparison {
    background: var(--bg-secondary);
}

.section-tag.compare {
    background: rgba(0, 224, 255, 0.15);
    color: var(--accent-secondary);
}

.comparison-table-wrapper {
    overflow-x: auto;
    margin-bottom: 48px;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 700px;
}

.comparison-table th,
.comparison-table td {
    padding: 20px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.comparison-table th {
    background: var(--bg-card);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.comparison-table th.highlight-col {
    background: linear-gradient(180deg, rgba(0, 245, 212, 0.1) 0%, rgba(0, 224, 255, 0.05) 100%);
    color: var(--text-primary);
    border-left: 2px solid var(--accent-primary);
    border-right: 2px solid var(--accent-primary);
    position: relative;
}

.comparison-table th.highlight-col::before {
    content: '';
    position: absolute;
    top: 0;
    left: -2px;
    right: -2px;
    height: 2px;
    background: var(--accent-primary);
}

.comparison-table td.highlight-col {
    background: rgba(0, 245, 212, 0.03);
    border-left: 2px solid var(--accent-primary);
    border-right: 2px solid var(--accent-primary);
}

.highlight-badge {
    display: inline-block;
    background: var(--accent-gradient);
    color: var(--bg-primary);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.comparison-table .feature-name {
    font-weight: 600;
    color: var(--text-primary);
}

.comparison-table .feature-name svg {
    width: 18px;
    height: 18px;
    margin-right: 10px;
    vertical-align: middle;
    color: var(--accent-primary);
}

.cell-positive {
    color: var(--text-primary);
}

.cell-positive strong {
    color: var(--accent-primary);
}

.cell-negative {
    color: var(--text-secondary);
}

.cell-negative strong {
    color: var(--critical);
}

.cell-neutral {
    color: var(--text-secondary);
}

.cell-neutral strong {
    color: var(--warning);
}

.comparison-table td p {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.check-icon,
.cross-icon,
.warn-icon {
    font-size: 1rem;
    margin-bottom: 4px;
}

.comparison-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
}

.summary-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 28px;
    text-align: center;
    transition: all 0.3s ease;
}

.summary-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
}

.summary-icon {
    font-size: 2rem;
    margin-bottom: 16px;
}

.summary-card h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--accent-primary);
}

.summary-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* ROI 效益展示 */
.roi-showcase {
    background: var(--bg-primary);
}

.section-tag.roi {
    background: rgba(0, 245, 212, 0.15);
    color: var(--accent-primary);
}

.roi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-bottom: 48px;
}

.roi-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px;
    transition: all 0.3s ease;
}

.roi-card:hover {
    border-color: var(--accent-primary);
    box-shadow: 0 20px 60px rgba(0, 245, 212, 0.1);
}

.roi-icon {
    width: 48px;
    height: 48px;
    background: rgba(0, 245, 212, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--accent-primary);
}

.roi-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.roi-before-after {
    display: flex;
    align-items: stretch;
    gap: 12px;
    margin-bottom: 16px;
}

.roi-before,
.roi-after {
    flex: 1;
    padding: 16px;
    border-radius: 10px;
    text-align: center;
}

.roi-before {
    background: rgba(255, 71, 87, 0.08);
    border: 1px solid rgba(255, 71, 87, 0.2);
}

.roi-after {
    background: rgba(0, 245, 212, 0.08);
    border: 1px solid rgba(0, 245, 212, 0.2);
}

.roi-before .label,
.roi-after .label {
    display: block;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.roi-before .value {
    display: block;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--critical);
}

.roi-after .value {
    display: block;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent-primary);
}

.roi-before p,
.roi-after p {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 6px;
}

.roi-arrow {
    display: flex;
    align-items: center;
    color: var(--text-muted);
    font-size: 1.25rem;
}

.roi-result {
    background: linear-gradient(135deg, rgba(0, 245, 212, 0.1), rgba(0, 224, 255, 0.1));
    padding: 16px;
    border-radius: 10px;
    text-align: center;
    border: 1px solid rgba(0, 245, 212, 0.2);
}

.roi-result .result-number {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-primary);
}

.roi-result .result-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* 社会证明增强 */
.industry-tags {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 48px;
}

.industry-tag {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.industry-tag:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.proof-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 32px;
    max-width: 800px;
    margin: 0 auto 60px;
}

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

.proof-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent-primary);
    line-height: 1;
}

.proof-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 8px;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.testimonials-grid .testimonial {
    margin: 0;
    max-width: none;
}

.testimonial-role {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(0, 245, 212, 0.1);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent-primary);
    margin-bottom: 16px;
}

.testimonial-role svg {
    width: 14px;
    height: 14px;
}

.testimonials-grid .testimonial blockquote {
    font-size: 1rem;
    margin-bottom: 20px;
}

/* CTA 信任徽章 */
.cta-trust {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 20px 0;
}

.cta-badges {
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
    margin-top: 24px;
}

.cta-badges .badge {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* 响应式优化 */
@media (max-width: 768px) {
    .compare-row {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .compare-arrow {
        transform: rotate(90deg);
    }
    
    .roi-before-after {
        flex-direction: column;
    }
    
    .roi-arrow {
        transform: rotate(90deg);
        justify-content: center;
    }
    
    .hero-benefits {
        flex-direction: column;
        gap: 16px;
        align-items: center;
    }
    
    .comparison-table {
        font-size: 0.85rem;
    }
    
    .comparison-table th,
    .comparison-table td {
        padding: 12px;
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .proof-stats {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ============================================
   可访问性与信任展示新增样式
   ============================================ */

/* Skip Link (Accessibility) */
.skip-link {
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent-primary);
    color: var(--bg-primary);
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    z-index: 9999;
    transition: top 0.3s ease;
}

.skip-link:focus {
    top: 10px;
}

/* Trusted By Section */
.trusted-by {
    padding: 48px 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
}

.trusted-label {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 32px;
}

.trusted-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 40px;
    margin-bottom: 24px;
}

.logo-item {
    color: var(--text-secondary);
    opacity: 0.6;
    transition: opacity 0.3s ease;
}

.logo-item:hover {
    opacity: 1;
}

.trusted-note {
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Integrations Section */
.integrations {
    padding: 100px 0;
    background: var(--bg-primary);
}

.integrations-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.integration-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px;
    transition: all 0.3s ease;
}

.integration-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 245, 212, 0.1);
}

.integration-card.primary {
    border-color: var(--accent-primary);
    background: linear-gradient(135deg, rgba(0, 245, 212, 0.1) 0%, rgba(0, 224, 255, 0.05) 100%);
}

.integration-icon {
    width: 56px;
    height: 56px;
    background: rgba(0, 245, 212, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--accent-primary);
}

.integration-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.integration-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.6;
}

.integration-status {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 20px;
    background: rgba(0, 245, 212, 0.15);
    color: var(--accent-primary);
}

.integration-status.coming-soon {
    background: rgba(255, 165, 2, 0.15);
    color: var(--warning);
}

/* Responsive for new sections */
@media (max-width: 768px) {
    .trusted-logos {
        gap: 24px;
    }
    
    .logo-item svg {
        width: 100px;
    }
    
    .integrations-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   UI优化新增样式
   ============================================ */

/* Demo Tabs */
.demo-tabs {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.demo-tab {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.demo-tab:hover {
    border-color: var(--accent-primary);
    color: var(--text-primary);
}

.demo-tab.active {
    background: rgba(0, 245, 212, 0.1);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.demo-tab svg {
    width: 16px;
    height: 16px;
}

.demo-note {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 24px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* Pricing Enhancements */
.pricing-tagline {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 16px;
}

.pricing-note {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 16px;
    text-align: center;
}

.pricing-card.popular .pricing-note {
    color: var(--accent-primary);
    font-weight: 500;
}

/* FAQ Section */
.faq {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 24px;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 28px;
    transition: all 0.3s ease;
}

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

.faq-question {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
    line-height: 1.4;
}

.faq-answer {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Hero CTA enhancements */
.hero-cta {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-outline:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.btn-outline svg {
    stroke: currentColor;
}

/* Mobile optimizations */
@media (max-width: 768px) {
    .demo-tabs {
        gap: 8px;
    }
    
    .demo-tab {
        padding: 10px 14px;
        font-size: 0.8rem;
    }
    
    .faq-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-cta .btn {
        width: 100%;
        max-width: 320px;
        justify-content: center;
    }
    
    .nav-links {
        display: none;
    }
    
    .pricing-grid {
        gap: 24px;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
}

@media (max-width: 480px) {
    .demo-tab span:not(.demo-tab svg) {
        display: none;
    }
    
    .demo-tab {
        padding: 12px;
    }
    
    .faq-item {
        padding: 20px;
    }
    
    .faq-question {
        font-size: 0.95rem;
    }
}