/* ============================================
   AI云营 Landing Page Styles
   Mobile-first responsive design
   ============================================ */

/* CSS Variables */
:root {
    --primary: #6C5CE7;
    --primary-dark: #5A4BD1;
    --primary-light: #A29BFE;
    --secondary: #00CEC9;
    --accent: #FD79A8;
    --gradient-1: linear-gradient(135deg, #6C5CE7, #00CEC9);
    --gradient-2: linear-gradient(135deg, #FD79A8, #6C5CE7);
    --gradient-3: linear-gradient(135deg, #00CEC9, #0984E3);
    --bg-dark: #F5F6FA;
    --bg-card: #FFFFFF;
    --bg-card-hover: #F0F1F5;
    --text-primary: #1A1A2E;
    --text-secondary: #5A5A7A;
    --text-muted: #9A9ABF;
    --border: rgba(108, 92, 231, 0.15);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.1);
    --shadow-glow: 0 2px 16px rgba(108, 92, 231, 0.15);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

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

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ============================================
   NAVBAR
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: all 0.3s ease;
    background: transparent;
}

.navbar.scrolled {
    background: rgba(245, 246, 250, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 10px 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.4rem;
    font-weight: 700;
}

.logo-icon {
    font-size: 1.6rem;
}

.logo-text {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: none;
    gap: 32px;
}

.nav-links a {
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: color 0.3s;
    font-weight: 500;
}

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

.nav-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s ease;
    border-radius: 2px;
}

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

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

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    padding: 120px 20px 60px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 50% 20%, rgba(108, 92, 231, 0.08) 0%, transparent 60%),
        radial-gradient(ellipse 60% 40% at 80% 80%, rgba(0, 206, 201, 0.06) 0%, transparent 50%);
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(108, 92, 231, 0.06);
    border: 1px solid var(--border);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--primary);
    margin-bottom: 24px;
    letter-spacing: 2px;
    font-weight: 500;
}

.hero h1 {
    font-size: 2.2rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    letter-spacing: -0.5px;
}

.gradient-text {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 32px;
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
    align-items: center;
    margin-bottom: 48px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-family: inherit;
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-1);
    color: white;
    box-shadow: 0 4px 12px rgba(108, 92, 231, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(108, 92, 231, 0.35);
}

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

.btn-outline:hover {
    background: rgba(108, 92, 231, 0.06);
    border-color: var(--primary);
}

.btn-ghost {
    background: rgba(255,255,255,0.05);
    color: var(--text-primary);
    border: 1px solid rgba(255,255,255,0.1);
}

.btn-ghost:hover {
    background: rgba(255,255,255,0.06);
}

.btn-accent {
    background: var(--gradient-2);
    color: white;
    box-shadow: 0 4px 12px rgba(253, 121, 168, 0.25);
}

.btn-accent:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(253, 121, 168, 0.35);
}

.btn-lg {
    padding: 14px 36px;
    font-size: 1.05rem;
}

.btn-block {
    width: 100%;
}

/* Hero Stats */
.hero-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    max-width: 500px;
    margin: 0 auto;
}

.stat-item {
    text-align: center;
    padding: 16px;
    background: rgba(108, 92, 231, 0.04);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 4px;
    display: block;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 0.75rem;
    animation: bounce 2s infinite;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid var(--text-muted);
    border-bottom: 2px solid var(--text-muted);
    transform: rotate(45deg);
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

/* ============================================
   SECTIONS
   ============================================ */
.section {
    padding: 80px 0;
}

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

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(108, 92, 231, 0.06);
    border: 1px solid var(--border);
    border-radius: 50px;
    font-size: 0.8rem;
    color: var(--primary);
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
}

.section-header h2 {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 12px;
    line-height: 1.3;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1rem;
    max-width: 500px;
    margin: 0 auto;
}

/* ============================================
   FEATURES
   ============================================ */
.features-grid {
    display: grid;
    gap: 16px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-1);
    opacity: 0;
    transition: opacity 0.3s;
}

.feature-card:hover {
    border-color: rgba(108, 92, 231, 0.35);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: 16px;
    display: block;
}

.feature-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
}

/* ============================================
   AGENTS
   ============================================ */
.agents {
    background: linear-gradient(180deg, var(--bg-dark) 0%, rgba(240, 241, 245, 0.8) 100%);
}

.agents-showcase {
    display: grid;
    gap: 12px;
}

.agent-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.agent-card:hover {
    border-color: rgba(108, 92, 231, 0.35);
    transform: translateX(4px);
    box-shadow: var(--shadow-glow);
}

.agent-avatar {
    font-size: 2rem;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(108, 92, 231, 0.08);
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.agent-info h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 2px;
}

.agent-role {
    font-size: 0.8rem;
    color: var(--primary-light);
    font-weight: 500;
}

.agent-info p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* ============================================
   WORKFLOW
   ============================================ */
.workflow-demo {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px 20px;
    overflow-x: auto;
}

.workflow-visual {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: max-content;
    padding: 20px 0;
    justify-content: center;
}

.workflow-node {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 16px 12px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    background: rgba(108, 92, 231, 0.03);
    min-width: 90px;
    text-align: center;
    transition: all 0.3s;
}

.workflow-node:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.node-icon {
    font-size: 1.5rem;
}

.node-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.node-trigger { border-color: rgba(0, 206, 201, 0.3); }
.node-agent { border-color: rgba(108, 92, 231, 0.3); }
.node-condition { border-color: rgba(253, 121, 168, 0.3); }
.node-action { border-color: rgba(9, 132, 227, 0.3); }
.node-output { border-color: rgba(0, 184, 148, 0.3); }

.workflow-connector {
    width: 30px;
    height: 2px;
    background: var(--gradient-1);
    flex-shrink: 0;
    position: relative;
}

.workflow-connector::after {
    content: '';
    position: absolute;
    right: -4px;
    top: -3px;
    width: 8px;
    height: 8px;
    border-right: 2px solid var(--primary);
    border-top: 2px solid var(--primary);
    transform: rotate(45deg);
}

.workflow-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

.wf-stat {
    text-align: center;
    padding: 12px;
}

.wf-num {
    display: block;
    font-size: 1.6rem;
    font-weight: 800;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

/* ============================================
   PLATFORMS
   ============================================ */
.platforms-grid {
    display: grid;
    gap: 16px;
}

.platform-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    text-align: center;
    transition: all 0.3s ease;
}

.platform-card:hover {
    border-color: rgba(108, 92, 231, 0.35);
    transform: translateY(-4px);
}

.platform-icon {
    font-size: 2.5rem;
    margin-bottom: 12px;
}

.platform-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
}

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

.platform-methods {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}

.platform-methods span {
    padding: 4px 12px;
    background: rgba(108, 92, 231, 0.06);
    border: 1px solid var(--border);
    border-radius: 50px;
    font-size: 0.75rem;
    color: var(--primary);
}

/* ============================================
   GEO/AEO
   ============================================ */
.geo-aeo-grid {
    display: grid;
    gap: 16px;
}

.geo-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    transition: all 0.3s;
}

.geo-card:hover {
    border-color: rgba(108, 92, 231, 0.35);
    transform: translateY(-4px);
}

.geo-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.geo-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.geo-card ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.geo-card li {
    font-size: 0.9rem;
    color: var(--text-secondary);
    padding-left: 20px;
    position: relative;
}

.geo-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--secondary);
    font-weight: 700;
}

/* ============================================
   MODULES
   ============================================ */
.modules-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.module-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.3s;
}

.module-item:hover {
    border-color: var(--primary);
    background: rgba(108, 92, 231, 0.04);
}

.module-item span {
    font-size: 1.2rem;
}

/* ============================================
   CUSTOM MODULES
   ============================================ */
.custom-modules-content {
    display: grid;
    gap: 40px;
}

.custom-modules-features {
    display: grid;
    gap: 20px;
}

.custom-feature {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: all 0.3s;
}

.custom-feature:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
}

.custom-feature-icon {
    font-size: 1.8rem;
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(108, 92, 231, 0.08);
    border-radius: var(--radius-sm);
}

.custom-feature-info h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 6px;
}

.custom-feature-info p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.custom-modules-example h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 16px;
    text-align: center;
}

.combo-cards {
    display: grid;
    gap: 12px;
}

.combo-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 20px;
    position: relative;
    transition: all 0.3s;
}

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

.combo-featured {
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
}

.combo-badge {
    position: absolute;
    top: -1px;
    right: 16px;
    background: var(--gradient-2);
    color: white;
    font-size: 0.7rem;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
}

.combo-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.combo-icon {
    font-size: 1.5rem;
}

.combo-header h4 {
    font-size: 1rem;
    font-weight: 600;
}

.combo-modules {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 12px;
}

.combo-modules span {
    padding: 4px 10px;
    background: rgba(108, 92, 231, 0.08);
    border-radius: 100px;
    font-size: 0.75rem;
    color: var(--primary);
    font-weight: 500;
}

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

.combo-full {
    border-color: var(--accent);
    background: linear-gradient(135deg, rgba(253, 121, 168, 0.03), rgba(108, 92, 231, 0.03));
}

.combo-full .combo-badge {
    background: var(--gradient-1);
}

.combo-full .combo-modules span {
    background: rgba(253, 121, 168, 0.1);
    color: var(--accent);
}

/* ============================================
   PRICING
   ============================================ */
.pricing-grid {
    display: grid;
    gap: 16px;
}

.pricing-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    position: relative;
    transition: all 0.3s;
}

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

.pricing-featured {
    border-color: var(--primary);
    box-shadow: 0 2px 16px rgba(108, 92, 231, 0.15);
}

.pricing-custom {
    max-width: 600px;
    margin: 0 auto;
    border-color: var(--primary);
    box-shadow: 0 4px 20px rgba(108, 92, 231, 0.2);
}

.pricing-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.price-desc {
    font-size: 1.8rem;
    font-weight: 800;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: 4px 20px;
    background: var(--gradient-1);
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 700;
    white-space: nowrap;
    box-shadow: 0 2px 8px rgba(108, 92, 231, 0.25);
}

.pricing-header {
    text-align: center;
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border);
}

.pricing-header h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 12px;
}

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

.price-currency {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

.price-amount {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.pricing-features {
    list-style: none;
    margin-bottom: 24px;
}

.pricing-features li {
    padding: 8px 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
    border-bottom: 1px solid rgba(255,255,255,0.03);
}

/* ============================================
   CTA
   ============================================ */
.cta {
    padding: 80px 0;
}

.cta-content {
    text-align: center;
    padding: 60px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    position: relative;
    overflow: hidden;
}

.cta-content::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, rgba(108, 92, 231, 0.06) 0%, transparent 70%);
    z-index: 0;
}

.cta-content h2 {
    font-size: 1.6rem;
    font-weight: 800;
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
}

.cta-content p {
    color: var(--text-secondary);
    margin-bottom: 32px;
    position: relative;
    z-index: 1;
}

.cta-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
    align-items: center;
    position: relative;
    z-index: 1;
}

/* ============================================
    GUESTBOOK
    ============================================ */
.guestbook {
    background: linear-gradient(180deg, var(--bg-dark) 0%, rgba(240, 241, 245, 0.8) 100%);
}

.guestbook-form-wrapper {
    max-width: 700px;
    margin: 0 auto;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    box-shadow: var(--shadow-md);
}

.guestbook-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea {
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-family: inherit;
    color: var(--text-primary);
    background: var(--bg-dark);
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-note {
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 8px;
}

.guestbook-success {
    text-align: center;
    padding: 40px 20px;
}

.success-icon {
    width: 64px;
    height: 64px;
    background: var(--gradient-1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
    margin: 0 auto 20px;
}

.guestbook-success h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.guestbook-success p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

@media (max-width: 767px) {
    .guestbook-form-wrapper {
        padding: 24px 16px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    border-top: 1px solid var(--border);
    padding: 60px 0 30px;
    background: var(--bg-dark);
}

.footer-grid {
    display: grid;
    gap: 32px;
    margin-bottom: 40px;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-top: 12px;
    line-height: 1.7;
}

.footer-links h4 {
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.footer-links a {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    padding: 4px 0;
    transition: color 0.3s;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

.footer-bottom p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ============================================
    HERO TRUST
    ============================================ */
.hero-trust {
    display: flex;
    gap: 24px;
    justify-content: center;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.hero-trust span {
    font-size: 0.85rem;
    color: var(--secondary);
    font-weight: 500;
}

/* ============================================
    FAQ
    ============================================ */
.faq {
    background: linear-gradient(180deg, var(--bg-dark) 0%, rgba(240, 241, 245, 0.8) 100%);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item:hover {
    border-color: rgba(108, 92, 231, 0.3);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    cursor: pointer;
    user-select: none;
}

.faq-question h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.faq-toggle {
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--primary);
    transition: transform 0.3s ease;
    flex-shrink: 0;
    margin-left: 16px;
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 300px;
}

.faq-answer p {
    padding: 0 24px 20px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin: 0;
}

@media (max-width: 767px) {
    .hero-trust {
        gap: 12px;
    }
    
    .hero-trust span {
        font-size: 0.75rem;
    }
    
    .faq-question {
        padding: 16px 20px;
    }
    
    .faq-question h3 {
        font-size: 0.9rem;
    }
    
    .faq-answer p {
        padding: 0 20px 16px;
        font-size: 0.85rem;
    }
}

/* ============================================
   ANIMATIONS
   ============================================ */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   TABLET (768px+)
   ============================================ */
@media (min-width: 768px) {
    .container {
        padding: 0 32px;
    }

    .nav-links {
        display: flex;
    }

    .nav-toggle {
        display: none;
    }

    .hero h1 {
        font-size: 3rem;
    }

    .hero-desc {
        font-size: 1.1rem;
    }

    .hero-actions {
        flex-direction: row;
        justify-content: center;
    }

    .hero-stats {
        grid-template-columns: repeat(4, 1fr);
        max-width: 700px;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .feature-large {
        grid-column: span 2;
    }

    .agents-showcase {
        grid-template-columns: repeat(2, 1fr);
    }

    .workflow-stats {
        grid-template-columns: repeat(4, 1fr);
    }

    .platforms-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .geo-aeo-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .modules-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .custom-modules-content {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
        align-items: start;
    }

    .custom-modules-features {
        gap: 16px;
    }

    .combo-cards {
        grid-template-columns: repeat(3, 1fr);
        gap: 12px;
    }

    .pricing-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .footer-grid {
        grid-template-columns: 2fr 1fr 1fr 1fr;
    }

    .cta-actions {
        flex-direction: row;
        justify-content: center;
    }
}

/* ============================================
    DESKTOP (1024px+)
    ============================================ */
@media (min-width: 1024px) {
    .hero h1 {
        font-size: 3.5rem;
    }

    .section-header h2 {
        font-size: 2.2rem;
    }

    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .feature-large {
        grid-column: span 3;
    }

    .agents-showcase {
        grid-template-columns: repeat(3, 1fr);
    }

    .modules-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ============================================
    MOBILE ENHANCEMENTS
    ============================================ */
@media (max-width: 767px) {
    .hero {
        padding: 100px 16px 40px;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .hero-desc {
        font-size: 0.9rem;
        line-height: 1.7;
    }

    .hero-actions {
        width: 100%;
        padding: 0 16px;
    }

    .hero-actions .btn {
        width: 100%;
        padding: 14px 24px;
    }

    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
        width: 100%;
    }

    .stat-item {
        padding: 12px 8px;
    }

    .stat-number {
        font-size: 1.5rem;
    }

    .stat-label {
        font-size: 0.7rem;
    }

    .section {
        padding: 48px 0;
    }

    .section-header h2 {
        font-size: 1.4rem;
    }

    .section-header p {
        font-size: 0.85rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .feature-card {
        padding: 20px 16px;
    }

    .feature-icon {
        font-size: 1.8rem;
    }

    .feature-card h3 {
        font-size: 1rem;
    }

    .feature-card p {
        font-size: 0.85rem;
    }

    .agents-showcase {
        grid-template-columns: 1fr;
    }

    .agent-card {
        padding: 16px;
    }

    .agent-avatar {
        width: 48px;
        height: 48px;
        font-size: 1.6rem;
    }

    .agent-info h3 {
        font-size: 0.9rem;
    }

    .agent-info p {
        font-size: 0.8rem;
    }

    .workflow-visual {
        padding: 12px 0;
        gap: 6px;
    }

    .workflow-node {
        padding: 12px 8px;
        min-width: 72px;
    }

    .node-icon {
        font-size: 1.2rem;
    }

    .node-label {
        font-size: 0.65rem;
    }

    .workflow-connector {
        width: 16px;
    }

    .workflow-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }

    .wf-num {
        font-size: 1.3rem;
    }

    .platforms-grid {
        grid-template-columns: 1fr;
    }

    .platform-card {
        padding: 20px 16px;
    }

    .platform-icon {
        font-size: 2rem;
    }

    .geo-aeo-grid {
        grid-template-columns: 1fr;
    }

    .geo-card {
        padding: 20px 16px;
    }

    .modules-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }

    .module-item {
        padding: 10px 12px;
        font-size: 0.75rem;
    }

    .module-item span {
        font-size: 1rem;
    }

    .pricing-grid {
        grid-template-columns: 1fr;
    }

    .pricing-card {
        padding: 24px 16px;
    }

    .price-amount {
        font-size: 2rem;
    }

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

    .cta-content {
        padding: 40px 20px;
    }

    .cta-content h2 {
        font-size: 1.3rem;
    }

    .scroll-indicator {
        bottom: 16px;
    }

    .scroll-indicator span {
        font-size: 0.65rem;
    }

    .scroll-arrow {
        width: 16px;
        height: 16px;
    }
}