:root {
  --bg:#F8FAFC;
  --text:#0F172A;
  --primary:#3B82F6;
  --accent:#8B5CF6;
  --dark:#0F172A;
}
* { box-sizing:border-box; margin:0; padding:0; }
body {
  font-family: 'Inter', 'PingFang SC', sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
  overflow-x:hidden;
}
/* Header */
header {
  padding:20px 40px;
  display:flex;
  justify-content:space-between;
  align-items:center;
  position:sticky;
  top:0;
  backdrop-filter:blur(16px);
  background:rgba(15,23,42,.85);
  z-index:100;
}
.logo { font-weight:800; font-size:22px; letter-spacing:-1px; color:#fff; }
.logo span { color:var(--primary); }
nav a {
  margin-left:28px;
  text-decoration:none;
  color:rgba(255,255,255,.8);
  font-weight:500;
  font-size:14px;
  transition:color .2s;
}
nav a:hover { color:#fff; }
/* Hero */
.hero {
  padding:160px 20px 120px;
  text-align:center;
  background:linear-gradient(135deg,#0F172A 0%,#1E293B 50%,#0F172A 100%);
  color:#fff;
  position:relative;
  overflow:hidden;
}
.hero::before {
  content:'';
  position:absolute;
  top:-50%;
  left:-50%;
  width:200%;
  height:200%;
  background:radial-gradient(circle at 30% 50%,rgba(59,130,246,.15) 0%,transparent 50%),
             radial-gradient(circle at 70% 50%,rgba(139,92,246,.15) 0%,transparent 50%);
  animation:pulse 8s ease-in-out infinite;
}
@keyframes pulse {
  0%,100% { transform:scale(1); opacity:.5; }
  50% { transform:scale(1.1); opacity:1; }
}
.hero h1 {
  font-size:clamp(40px,7vw,72px);
  font-weight:900;
  margin-bottom:24px;
  position:relative;
  letter-spacing:-2px;
}
.hero h1 .gradient {
  background:linear-gradient(90deg,var(--primary),var(--accent));
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
}
.hero p {
  max-width:720px;
  margin:0 auto 40px;
  font-size:20px;
  opacity:.85;
  position:relative;
}
.btn-group { display:flex; gap:16px; justify-content:center; flex-wrap:wrap; position:relative; }
.btn {
  display:inline-block;
  padding:16px 36px;
  border-radius:999px;
  font-weight:700;
  text-decoration:none;
  font-size:16px;
  transition:all .3s;
  cursor:pointer;
}
.btn-primary {
  background:linear-gradient(135deg,var(--primary),var(--accent));
  color:#fff;
  box-shadow:0 8px 30px rgba(59,130,246,.4);
}
.btn-primary:hover { transform:translateY(-2px); box-shadow:0 12px 40px rgba(59,130,246,.6); }
.btn-secondary {
  background:transparent;
  color:#fff;
  border:2px solid rgba(255,255,255,.3);
}
.btn-secondary:hover { border-color:#fff; background:rgba(255,255,255,.1); }
/* Sections */
section {
  padding:100px 20px;
  max-width:1200px;
  margin:auto;
}
section h2 {
  font-size:clamp(28px,4vw,42px);
  font-weight:800;
  margin-bottom:16px;
  text-align:center;
}
section .subtitle {
  text-align:center;
  max-width:700px;
  margin:0 auto 60px;
  font-size:18px;
  color:#64748B;
}
/* Grid */
.grid-4 {
  display:grid;
  gap:32px;
  grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
}
.grid-2 {
  display:grid;
  gap:48px;
  grid-template-columns:repeat(auto-fit,minmax(320px,1fr));
}
/* Cards */
.card {
  background:#fff;
  padding:36px 28px;
  border-radius:20px;
  box-shadow:0 10px 40px rgba(0,0,0,.06);
  transition:all .3s;
  border:1px solid transparent;
}
.card:hover {
  transform:translateY(-4px);
  box-shadow:0 20px 60px rgba(0,0,0,.1);
  border-color:rgba(59,130,246,.2);
}
.card h3 { font-size:20px; margin-bottom:12px; color:var(--dark); }
.card p { color:#64748B; font-size:15px; }
.card .icon {
  width:56px; height:56px;
  border-radius:14px;
  display:flex; align-items:center; justify-content:center;
  font-size:24px;
  margin-bottom:20px;
}
.bg-blue { background:linear-gradient(135deg,#DBEAFE,#E0E7FF); }
.bg-purple { background:linear-gradient(135deg,#EDE9FE,#F5F3FF); }
.bg-green { background:linear-gradient(135deg,#D1FAE5,#ECFDF5); }
.bg-orange { background:linear-gradient(135deg,#FEF3C7,#FFF7ED); }
/* Compare Table */
.compare {
  background:var(--dark);
  color:#fff;
  border-radius:24px;
  padding:60px 40px;
  overflow:hidden;
}
.compare table { width:100%; border-collapse:collapse; margin-top:32px; }
.compare th, .compare td {
  padding:18px 24px;
  text-align:left;
  border-bottom:1px solid rgba(255,255,255,.1);
}
.compare th { font-size:18px; }
.compare td { color:rgba(255,255,255,.7); }
.compare .highlight { color:var(--primary); font-weight:700; }
/* Stats */
.stats {
  background:linear-gradient(135deg,var(--primary),var(--accent));
  color:#fff;
  border-radius:24px;
  padding:60px 40px;
  text-align:center;
}
.stats .grid-4 { margin-top:0; }
.stat-item h3 { font-size:48px; font-weight:900; margin-bottom:8px; }
.stat-item p { opacity:.85; font-size:16px; }
/* Testimonials */
.testimonial-card {
  background:#fff;
  padding:32px;
  border-radius:20px;
  box-shadow:0 10px 40px rgba(0,0,0,.06);
  position:relative;
}
.testimonial-card::before {
  content:'"';
  position:absolute;
  top:20px; left:28px;
  font-size:60px;
  color:var(--primary);
  opacity:.2;
  font-weight:900;
}
.testimonial-card p { font-style:italic; color:#475569; margin-bottom:16px; }
.testimonial-card .author { font-weight:700; color:var(--dark); }
.testimonial-card .role { font-size:14px; color:#94A3B8; }
/* CTA Section */
.cta-section {
  background:var(--dark);
  color:#fff;
  text-align:center;
  padding:100px 20px;
}
.cta-section h2 { color:#fff; }
.cta-section p { color:rgba(255,255,255,.7); max-width:600px; margin:0 auto 40px; font-size:18px; }
/* Form */
.form-wrapper {
  max-width:600px;
  margin:auto;
  background:#fff;
  padding:48px 40px;
  border-radius:24px;
  box-shadow:0 20px 60px rgba(0,0,0,.1);
}
.form-wrapper label { display:block; margin-bottom:8px; font-weight:600; color:var(--dark); text-align:left; }
.form-wrapper input, .form-wrapper textarea {
  width:100%;
  padding:14px 18px;
  border:2px solid #E2E8F0;
  border-radius:12px;
  font-size:16px;
  margin-bottom:20px;
  transition:border-color .2s;
  font-family:inherit;
}
.form-wrapper input:focus, .form-wrapper textarea:focus {
  outline:none;
  border-color:var(--primary);
}
.form-wrapper button {
  width:100%;
  padding:16px;
  border:none;
  border-radius:12px;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  color:#fff;
  font-size:18px;
  font-weight:700;
  cursor:pointer;
  transition:all .3s;
}
.form-wrapper button:hover { transform:translateY(-2px); box-shadow:0 8px 30px rgba(59,130,246,.4); }
/* Footer */
footer {
  text-align:center;
  padding:40px 20px;
  font-size:14px;
  color:#94A3B8;
  background:#F1F5F9;
}
/* Logo Wall */
.logo-wall {
  display:flex;
  flex-wrap:wrap;
  gap:32px;
  justify-content:center;
  align-items:center;
  margin-top:40px;
}
.logo-item {
  width:140px; height:60px;
  background:#F1F5F9;
  border-radius:12px;
  display:flex; align-items:center; justify-content:center;
  font-weight:700; color:#94A3B8;
  font-size:14px;
  transition:all .3s;
}
.logo-item:hover { background:var(--primary); color:#fff; }
/* Diagnostic Tool */
.diagnostic-tool {
  background:linear-gradient(135deg,#FEF3C7,#FDE68A);
  border-radius:24px;
  padding:60px 40px;
  text-align:center;
}
.diagnostic-tool h2 { color:var(--dark); }
.diagnostic-tool .tool-input {
  max-width:500px;
  margin:32px auto 0;
  display:flex;
  gap:12px;
}
.diagnostic-tool input {
  flex:1;
  padding:16px 20px;
  border:2px solid #E2E8F0;
  border-radius:999px;
  font-size:16px;
}
.diagnostic-tool button {
  padding:16px 32px;
  border:none;
  border-radius:999px;
  background:var(--dark);
  color:#fff;
  font-weight:700;
  cursor:pointer;
}
/* Responsive */
@media(max-width:768px){
  header { padding:16px 20px; }
  nav a { margin-left:12px; font-size:13px; }
  .hero { padding:120px 16px 80px; }
  section { padding:60px 16px; }
  .compare { padding:40px 20px; }
  .form-wrapper { padding:32px 24px; }
  .diagnostic-tool .tool-input { flex-direction:column; }
}