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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', sans-serif;
    color: #111827;
    background: #ffffff;
    line-height: 1.6;
}

/* ===== Nav ===== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid #f3f4f6;
    z-index: 100;
}
.nav-inner {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.nav-brand { font-size: 20px; font-weight: 700; color: #2563eb; }
.nav-links { display: flex; gap: 32px; }
.nav-links a { color: #4b5563; text-decoration: none; font-size: 14px; font-weight: 500; }
.nav-links a:hover { color: #2563eb; }

/* ===== Buttons ===== */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 24px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}
.btn-primary { background: #2563eb; color: #fff; }
.btn-primary:hover { background: #1d4ed8; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(37,99,235,0.3); }
.btn-ghost { background: transparent; color: #2563eb; border: 1.5px solid #2563eb; }
.btn-ghost:hover { background: #eff6ff; }
.btn-sm { padding: 8px 20px; font-size: 13px; }
.btn-lg { padding: 16px 40px; font-size: 17px; }

/* ===== Hero ===== */
.hero {
    max-width: 1140px;
    margin: 0 auto;
    padding: 140px 24px 80px;
    display: flex;
    align-items: center;
    gap: 60px;
}
.hero-content { flex: 1; }
.hero h1 { font-size: 42px; font-weight: 800; line-height: 1.2; margin-bottom: 16px; color: #111827; }
.hero-sub { font-size: 18px; color: #6b7280; margin-bottom: 32px; line-height: 1.7; }
.hero-actions { display: flex; gap: 16px; margin-bottom: 40px; }
.hero-stats { display: flex; gap: 40px; }
.stat { display: flex; flex-direction: column; }
.stat-num { font-size: 22px; font-weight: 700; color: #2563eb; }
.stat-label { font-size: 13px; color: #9ca3af; }
.hero-visual { flex: 0 0 380px; }
.engine-svg { width: 100%; height: auto; }

/* ===== Sections ===== */
.section-header { text-align: center; margin-bottom: 60px; }
.section-header h2 { font-size: 32px; font-weight: 700; margin-bottom: 12px; }
.section-header p { font-size: 16px; color: #6b7280; }

/* ===== Services ===== */
.services { max-width: 1140px; margin: 0 auto; padding: 80px 24px; }
.service-row {
    display: flex;
    align-items: center;
    gap: 60px;
    margin-bottom: 80px;
}
.service-row.reverse { flex-direction: row-reverse; }
.service-text { flex: 1; }
.service-visual { flex: 0 0 320px; }
.service-tag { font-size: 13px; font-weight: 600; color: #2563eb; margin-bottom: 8px; text-transform: uppercase; letter-spacing: 0.5px; }
.service-text h3 { font-size: 26px; font-weight: 700; margin-bottom: 12px; }
.service-desc { font-size: 16px; color: #4b5563; margin-bottom: 20px; }
.service-points { list-style: none; }
.service-points li { padding: 6px 0; padding-left: 20px; position: relative; font-size: 15px; color: #374151; }
.service-points li::before { content: '✓'; position: absolute; left: 0; color: #2563eb; font-weight: 700; }

.radar-svg, .timeline-svg, .community-svg { width: 100%; height: auto; background: #f9fafb; border-radius: 16px; padding: 20px; }

/* ===== Why ===== */
.why-section { background: #f9fafb; padding: 80px 24px; }
.why-grid { max-width: 1140px; margin: 0 auto; display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.why-card { background: #fff; border-radius: 16px; padding: 32px 24px; text-align: center; border: 1px solid #f3f4f6; transition: box-shadow 0.2s; }
.why-card:hover { box-shadow: 0 8px 24px rgba(0,0,0,0.06); }
.why-icon { margin-bottom: 16px; }
.why-icon svg { width: 48px; height: 48px; }
.why-card h4 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.why-card p { font-size: 14px; color: #6b7280; line-height: 1.6; }

/* ===== Clients ===== */
.clients-section { max-width: 1140px; margin: 0 auto; padding: 80px 24px; }
.logo-wall { display: flex; justify-content: center; align-items: center; gap: 40px; margin-bottom: 40px; flex-wrap: wrap; }
.client-logo { opacity: 0.7; transition: opacity 0.2s; }
.client-logo:hover { opacity: 1; }
.client-logo svg { width: 120px; height: 40px; }
.testimonial { text-align: center; max-width: 600px; margin: 0 auto; }
.testimonial p { font-size: 18px; font-style: italic; color: #374151; margin-bottom: 12px; }
.testimonial-author { font-size: 14px; color: #9ca3af; }

/* ===== CTA ===== */
.cta-section { text-align: center; padding: 100px 24px; background: linear-gradient(135deg, #eff6ff 0%, #f0fdf4 100%); }
.cta-section h2 { font-size: 30px; font-weight: 700; margin-bottom: 12px; }
.cta-section p { font-size: 16px; color: #6b7280; margin-bottom: 32px; }

/* ===== Footer ===== */
.footer { border-top: 1px solid #f3f4f6; padding: 32px 24px; }
.footer-inner { max-width: 1140px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; }
.footer-brand { font-size: 16px; font-weight: 700; color: #2563eb; }
.footer-links { font-size: 13px; color: #6b7280; }
.footer-copy { font-size: 12px; color: #9ca3af; }

/* ===== Responsive ===== */
@media (max-width: 900px) {
    .hero { flex-direction: column; padding-top: 100px; }
    .hero-visual { flex: none; width: 100%; max-width: 320px; }
    .service-row, .service-row.reverse { flex-direction: column; }
    .service-visual { flex: none; width: 100%; max-width: 300px; }
    .why-grid { grid-template-columns: repeat(2, 1fr); }
    .nav-links { display: none; }
}
@media (max-width: 600px) {
    .hero h1 { font-size: 28px; }
    .hero-stats { flex-direction: column; gap: 16px; }
    .why-grid { grid-template-columns: 1fr; }
    .logo-wall { gap: 20px; }
}