:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #eff6ff;
    --text: #1f2937;
    --text-muted: #6b7280;
    --bg: #ffffff;
    --bg-alt: #f8fafc;
    --border: #e5e7eb;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ===== Header ===== */
.landing-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

.landing-header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.landing-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text);
    font-weight: 700;
    font-size: 1.1rem;
}

.landing-logo {
    width: 28px;
    height: 28px;
    object-fit: contain;
}

.landing-nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.landing-nav-link {
    padding: 8px 14px;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: 6px;
    transition: color 0.15s, background 0.15s;
}

.landing-nav-link:hover {
    color: var(--text);
    background: #f3f4f6;
}

.landing-mobile-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text);
    cursor: pointer;
}

/* ===== Buttons ===== */
.landing-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 20px;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

.landing-btn-primary {
    background: var(--primary);
    color: #fff;
}

.landing-btn-primary:hover {
    background: var(--primary-dark);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

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

.landing-btn-outline:hover {
    background: var(--primary-light);
    color: var(--primary-dark);
}

.landing-btn-lg {
    padding: 12px 28px;
    font-size: 1rem;
}

/* ===== Hero ===== */
.hero {
    padding: 120px 24px 60px;
    background: linear-gradient(135deg, #f0f7ff 0%, #e8f0fe 50%, #f5f3ff 100%);
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 60px;
}

.hero-text {
    flex: 1;
}

.hero-text h1 {
    font-size: 2.8rem;
    font-weight: 800;
    line-height: 1.15;
    color: var(--text);
    margin-bottom: 20px;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 32px;
    max-width: 540px;
}

.hero-actions {
    display: flex;
    gap: 14px;
    margin-bottom: 28px;
}

.hero-trust {
    display: flex;
    gap: 24px;
    font-size: 0.825rem;
    color: var(--text-muted);
}

.hero-trust span {
    display: flex;
    align-items: center;
    gap: 6px;
}

.hero-trust i {
    color: var(--primary);
}

.hero-image {
    flex: 0 0 auto;
}

.hero-image img {
    max-width: 360px;
    width: 100%;
    height: auto;
    filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.1));
}

/* ===== Sections ===== */
.landing-section {
    padding: 80px 24px;
}

.landing-section-alt {
    background: var(--bg-alt);
}

.landing-section-inner {
    max-width: 1200px;
    margin: 0 auto;
}

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

.section-header h2 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text);
    margin-bottom: 12px;
}

.section-header p {
    font-size: 1.05rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== Features Grid ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.feature-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 28px 24px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.06);
}

.feature-icon {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text);
}

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

/* ===== Integrations Grid ===== */
.integrations-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.integration-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    text-align: center;
    transition: transform 0.2s, box-shadow 0.2s;
}

.integration-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.05);
}

.integration-card i {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 12px;
    display: block;
}

.integration-card h4 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.integration-card p {
    font-size: 0.825rem;
    color: var(--text-muted);
    margin: 0;
}

/* ===== Steps ===== */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.step-card {
    text-align: center;
    padding: 20px;
}

.step-number {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    font-size: 1.2rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}

.step-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 8px;
}

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

/* ===== CTA ===== */
.landing-cta {
    padding: 80px 24px;
    background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 100%);
    text-align: center;
    color: #fff;
}

.landing-cta-inner {
    max-width: 600px;
    margin: 0 auto;
}

.cta-image {
    width: 120px;
    height: auto;
    margin-bottom: 24px;
    filter: drop-shadow(0 8px 16px rgba(0, 0, 0, 0.2));
}

.landing-cta h2 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 12px;
}

.landing-cta p {
    font-size: 1.05rem;
    opacity: 0.85;
    margin-bottom: 28px;
}

.landing-cta .landing-btn-primary {
    background: #fff;
    color: var(--primary);
    font-size: 1.05rem;
}

.landing-cta .landing-btn-primary:hover {
    background: #f0f7ff;
    color: var(--primary-dark);
    box-shadow: 0 4px 16px rgba(255, 255, 255, 0.3);
}

/* ===== Footer ===== */
.landing-footer {
    padding: 32px 24px;
    border-top: 1px solid var(--border);
    background: #fff;
}

.landing-footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}

.landing-footer-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: var(--text);
}

.landing-footer-links {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
}

.landing-footer-links a {
    color: var(--text-muted);
    text-decoration: none;
}

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

.landing-footer-links span {
    color: var(--border);
}

.landing-footer-text {
    font-size: 0.825rem;
    color: var(--text-muted);
    margin: 0;
}

/* ===== Integration Detail Pages ===== */
.integration-detail-row {
    display: flex;
    gap: 48px;
    align-items: flex-start;
}

.integration-detail-row.reverse {
    flex-direction: row-reverse;
}

.integration-detail-text {
    flex: 1;
}

.integration-detail-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.integration-detail-text h2 {
    font-size: 1.6rem;
    font-weight: 800;
    margin-bottom: 14px;
    line-height: 1.3;
}

.integration-detail-text p {
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 16px;
}

.integration-detail-platforms {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.platform-tag {
    padding: 4px 12px;
    background: #f3f4f6;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text);
}

.integration-detail-features {
    flex: 0 0 380px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.detail-feature {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.9rem;
    color: var(--text);
}

.detail-feature i {
    color: var(--primary);
    font-size: 1.1rem;
    flex-shrink: 0;
}

/* Platform Detail Grid */
.platform-detail-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.platform-detail-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 28px;
}

.platform-detail-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.platform-detail-card p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 14px;
}

.platform-detail-card ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.platform-detail-card li {
    padding: 4px 0;
    font-size: 0.85rem;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 8px;
}

.platform-detail-card li::before {
    content: "\f26a"; /* bi-check-circle-fill */
    font-family: "bootstrap-icons";
    color: #10b981;
    font-size: 0.9rem;
}

/* Data Sync Grid */
.data-sync-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.data-sync-item {
    display: flex;
    gap: 16px;
    padding: 20px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 10px;
}

.data-sync-icon {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.data-sync-item h4 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.data-sync-item p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.5;
    margin: 0;
}

/* AI Examples Grid */
.ai-examples-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.ai-example {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 20px;
}

.ai-example-q {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text);
    margin-bottom: 8px;
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

.ai-example-q i {
    color: var(--primary);
    margin-top: 2px;
    flex-shrink: 0;
}

.ai-example-a {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.6;
    padding-left: 26px;
}

/* ===== Responsive ===== */
@media (max-width: 992px) {
    .features-grid,
    .integrations-grid,
    .steps-grid,
    .platform-detail-grid,
    .data-sync-grid,
    .ai-examples-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .integration-detail-row,
    .integration-detail-row.reverse {
        flex-direction: column;
    }

    .integration-detail-features {
        flex: auto;
        width: 100%;
    }

    .hero-text h1 {
        font-size: 2.2rem;
    }

    .hero-image img {
        max-width: 280px;
    }
}

@media (max-width: 768px) {
    .landing-nav {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 16px 24px;
        border-bottom: 1px solid var(--border);
        box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    }

    .landing-nav.open {
        display: flex;
    }

    .landing-mobile-toggle {
        display: block;
    }

    .hero-content {
        flex-direction: column;
        text-align: center;
        gap: 40px;
    }

    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

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

    .hero-trust {
        justify-content: center;
        flex-wrap: wrap;
    }

    .hero-text h1 {
        font-size: 2rem;
    }

    .features-grid,
    .integrations-grid,
    .steps-grid,
    .platform-detail-grid,
    .data-sync-grid,
    .ai-examples-grid {
        grid-template-columns: 1fr;
    }

    .landing-footer-inner {
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-text h1 {
        font-size: 1.7rem;
    }

    .section-header h2 {
        font-size: 1.5rem;
    }

    .hero-trust {
        flex-direction: column;
        gap: 8px;
        align-items: center;
    }
}