:root {
    --ink: #0f172a;
    --ink-soft: #475569;
    --ink-faint: #94a3b8;
    --bg: #ffffff;
    --bg-soft: #f7f8ff;
    --bg-panel: #f1f4fa;
    --line: #e5e7ef;
  
    --blue: #2a4bff;
    --purple: #7c3aed;
    --blue-soft: #eaf0ff;
    --purple-soft: #f3ecff;
    --green: #22c55e;
    --green-soft: #dcfce7;
    --pink: #ec3166;
    --pink-hover: #d92457;
    --footer: #3c4a5c;
  
    --grad: linear-gradient(135deg, #2a4bff 0%, #7c3aed 100%);
    --grad-soft: linear-gradient(135deg, rgba(42,75,255,0.08), rgba(124,58,237,0.08));
    --shadow-card: 0 4px 24px rgba(15, 23, 42, 0.06);
    --shadow-btn: 0 8px 22px rgba(42,75,255,0.25);
  }
  
  * { margin: 0; padding: 0; box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  
  body {
    font-family: 'Nunito', system-ui, sans-serif;
    color: var(--ink);
    background: var(--bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
  }
  
  /* All headings use Poppins */
  h1, h2, h3, h4, h5, h6,
  .section-title,
  .hero-feat-title,
  .hero-feat-sub,
  .stat-num,
  .step-num {
    font-family: 'Poppins', system-ui, sans-serif;
  }
  
  .container {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 32px;
  }
  
  /* ============ NAV ============ */
  nav {
    background: #fff;
    border-bottom: 1px solid var(--line);
    position: sticky;
    top: 0;
    z-index: 100;
  }
  .nav-inner {
    max-width: 1240px;
    margin: 0 auto;
    padding: 18px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
  .logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--ink);
    font-weight: 900;
    font-size: 26px;
    letter-spacing: -0.5px;
  }
  .logo-mark {
    width: 40px; height: 40px;
    border-radius: 8px;
    background: linear-gradient(135deg, #fbbf24 0%, #ef4444 50%, #10b981 100%);
    position: relative;
    display: grid;
    place-items: center;
  }
  .logo-mark::before {
    content: '';
    position: absolute;
    inset: 3px;
    background: white;
    border-radius: 5px;
  }
  .logo-mark svg { position: relative; z-index: 1; }
  .logo-ai {
    font-size: 14px;
    color: var(--ink-soft);
    font-weight: 700;
    margin-left: 2px;
  }
  .nav-links {
    display: flex;
    gap: 40px;
    align-items: center;
  }
  .nav-links a {
    color: var(--ink);
    text-decoration: none;
    font-weight: 700;
    font-size: 13px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    transition: color 0.2s;
  }
  .nav-links a:hover { color: var(--blue); }
  @media (max-width: 960px) {
    .nav-links a:not(:last-child) { display: none; }
  }
  
  /* ============ HERO ============ */
  .hero {
    background: linear-gradient(180deg, #ffffff 0%, #f4f6ff 40%, #eef2ff 100%);
    padding: 80px 0 100px;
    position: relative;
    overflow: hidden;
  }
  .hero-grid {
    display: grid;
    grid-template-columns: 1.05fr 1fr;
    gap: 64px;
    align-items: center;
  }
  @media (max-width: 960px) {
    .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  }
  .eyebrow-chip {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: #fff;
    border: 1px solid var(--line);
    padding: 8px 14px;
    border-radius: 100px;
    font-size: 13px;
    font-weight: 700;
    color: var(--ink-soft);
    margin-bottom: 32px;
    box-shadow: var(--shadow-card);
  }
  .eyebrow-dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--green);
    box-shadow: 0 0 0 3px rgba(34,197,94,0.2);
  }
  .hero h1 {
    font-size: clamp(40px, 5.2vw, 68px);
    font-weight: 900;
    line-height: 1.05;
    letter-spacing: -0.02em;
    color: var(--ink);
    margin-bottom: 28px;
  }
  .gradient-text {
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
  }
  .hero p.lead {
    font-size: 18px;
    color: var(--ink-soft);
    max-width: 54ch;
    margin-bottom: 36px;
    line-height: 1.65;
  }
  .hero-ctas {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
  }
  .btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 28px;
    border-radius: 8px;
    font-weight: 800;
    font-size: 15px;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
  }
  .btn-primary {
    background: var(--grad);
    color: #fff;
    box-shadow: var(--shadow-btn);
  }
  .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(42,75,255,0.35); }
  .btn-pink {
    background: var(--pink);
    color: #fff;
    box-shadow: 0 8px 22px rgba(236,49,102,0.3);
  }
  .btn-pink:hover { background: var(--pink-hover); transform: translateY(-2px); }
  .btn-ghost {
    background: #fff;
    color: var(--ink);
    border: 1px solid var(--line);
  }
  .btn-ghost:hover { border-color: var(--blue); color: var(--blue); }
  .btn .arrow { transition: transform 0.2s; }
  .btn:hover .arrow { transform: translateX(4px); }
  
  .hero-card {
    background: #fff;
    border-radius: 20px;
    padding: 44px 36px;
    box-shadow: 0 20px 60px rgba(15,23,42,0.08);
    position: relative;
    overflow: hidden;
  }
  .hero-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
      linear-gradient(rgba(15,23,42,0.04) 1px, transparent 1px),
      linear-gradient(90deg, rgba(15,23,42,0.04) 1px, transparent 1px);
    background-size: 32px 32px;
    opacity: 0.6;
    pointer-events: none;
  }
  .hero-card-head {
    text-align: center;
    margin-bottom: 0;
    position: relative;
  }
  .hero-card-head h3 {
    font-size: 22px;
    font-weight: 800;
    margin-bottom: 4px;
  }
  .hero-card-head p {
    color: var(--ink-soft);
    font-size: 14px;
  }
  .hero-hero-icon {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: var(--grad);
    display: grid;
    place-items: center;
    margin: 28px auto 20px;
    position: relative;
    box-shadow: 0 10px 24px rgba(42,75,255,0.3);
  }
  .hero-feat-title {
    text-align: center;
    font-size: 22px;
    font-weight: 800;
    margin-bottom: 4px;
    position: relative;
  }
  .hero-feat-sub {
    text-align: center;
    font-size: 14px;
    font-weight: 700;
    color: var(--ink);
    margin-bottom: 6px;
    position: relative;
  }
  .hero-feat-desc {
    text-align: center;
    font-size: 13px;
    color: var(--ink-soft);
    margin-bottom: 24px;
    position: relative;
  }
  .dots {
    display: flex;
    gap: 8px;
    justify-content: center;
    margin-bottom: 28px;
    position: relative;
  }
  .dot { width: 8px; height: 8px; border-radius: 50%; background: #cbd5e1; }
  .dot.active { background: var(--blue); width: 24px; border-radius: 6px; }
  
  .feat-row {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 16px;
    border-radius: 12px;
    margin-bottom: 10px;
    position: relative;
    transition: all 0.2s;
  }
  .feat-row.active {
    background: #fff;
    border: 1px solid rgba(42,75,255,0.2);
    box-shadow: 0 4px 16px rgba(42,75,255,0.08);
  }
  .feat-icon {
    width: 40px; height: 40px;
    border-radius: 8px;
    display: grid;
    place-items: center;
    flex-shrink: 0;
    color: #fff;
  }
  .feat-icon.blue { background: var(--blue); }
  .feat-icon.green { background: var(--green); }
  .feat-icon.purple { background: var(--purple); }
  .feat-text h4 { font-size: 15px; font-weight: 800; margin-bottom: 2px; }
  .feat-text p { font-size: 12.5px; color: var(--ink-soft); line-height: 1.4; }
  
  /* ============ PROBLEM ============ */
  .problem {
    padding: 100px 0;
    background: #fff;
  }
  .section-head {
    text-align: center;
    max-width: 780px;
    margin: 0 auto 64px;
  }
  .section-eyebrow {
    display: inline-block;
    color: var(--blue);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 18px;
  }
  .section-title {
    font-size: clamp(32px, 4vw, 48px);
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 18px;
  }
  .section-sub {
    font-size: 18px;
    color: var(--ink-soft);
    max-width: 62ch;
    margin: 0 auto;
    line-height: 1.6;
  }
  .problem-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: center;
  }
  @media (max-width: 900px) { .problem-grid { grid-template-columns: 1fr; gap: 40px; } }
  
  .problem-text .section-eyebrow { margin-bottom: 12px; }
  .problem-text h3 {
    font-size: 32px;
    font-weight: 900;
    line-height: 1.15;
    margin-bottom: 18px;
    letter-spacing: -0.01em;
  }
  .problem-text p {
    color: var(--ink-soft);
    font-size: 16px;
    margin-bottom: 18px;
  }
  .problem-list {
    list-style: none;
  }
  .problem-list li {
    display: flex;
    gap: 12px;
    padding: 10px 0;
    color: var(--ink);
    font-weight: 600;
    font-size: 15px;
  }
  .problem-list li::before {
    content: '✕';
    color: var(--pink);
    font-weight: 900;
    flex-shrink: 0;
  }
  
  .chat-mock {
    background: #fff;
    border-radius: 20px;
    padding: 28px 24px;
    box-shadow: 0 20px 60px rgba(15,23,42,0.08);
    border: 1px solid var(--line);
    position: relative;
  }
  .chat-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--line);
    margin-bottom: 20px;
    font-size: 13px;
    font-weight: 700;
    color: var(--ink-soft);
  }
  .chat-head .warn {
    color: var(--pink);
    display: flex;
    align-items: center;
    gap: 6px;
  }
  .chat-head .warn-dot {
    width: 8px; height: 8px; border-radius: 50%;
    background: var(--pink);
    animation: ping 1.5s ease-in-out infinite;
  }
  @keyframes ping {
    0%,100% { opacity: 1; } 50% { opacity: 0.4; }
  }
  .bubble {
    max-width: 80%;
    padding: 10px 14px;
    border-radius: 14px;
    margin-bottom: 8px;
    font-size: 14px;
    line-height: 1.4;
  }
  .bubble.them {
    background: var(--bg-panel);
    color: var(--ink);
    border-bottom-left-radius: 4px;
  }
  .bubble.me {
    background: var(--grad);
    color: #fff;
    margin-left: auto;
    border-bottom-right-radius: 4px;
  }
  .bubble .code {
    font-weight: 900;
    letter-spacing: 0.5px;
  }
  .chat-foot {
    margin-top: 18px;
    padding-top: 16px;
    border-top: 1px dashed var(--line);
    font-size: 13px;
    color: var(--pink);
    font-weight: 700;
  }
  
  /* ============ HOW IT WORKS ============ */
  .how {
    padding: 100px 0;
    background: var(--bg-soft);
  }
  .steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
  }
  @media (max-width: 900px) { .steps { grid-template-columns: 1fr 1fr; } }
  @media (max-width: 560px) { .steps { grid-template-columns: 1fr; } }
  
  .step {
    background: #fff;
    border-radius: 16px;
    padding: 32px 26px;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--line);
    position: relative;
    transition: transform 0.25s, box-shadow 0.25s;
  }
  .step:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(15,23,42,0.08);
  }
  .step-num {
    position: absolute;
    top: 24px;
    right: 24px;
    font-size: 42px;
    font-weight: 900;
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    opacity: 0.18;
    line-height: 1;
  }
  .step-ico {
    width: 52px; height: 52px;
    border-radius: 12px;
    background: var(--grad-soft);
    color: var(--blue);
    display: grid;
    place-items: center;
    margin-bottom: 22px;
  }
  .step h3 {
    font-size: 18px;
    font-weight: 800;
    margin-bottom: 10px;
  }
  .step p {
    font-size: 14px;
    color: var(--ink-soft);
    line-height: 1.6;
  }
  
  /* ============ PARTNERS ============ */
  .partners {
    padding: 100px 0;
    background: #fff;
  }
  .partner-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: center;
  }
  .partner {
    background: var(--bg-soft);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 18px 32px;
    font-weight: 800;
    font-size: 16px;
    color: var(--ink);
    display: flex;
    align-items: center;
    gap: 10px;
    transition: all 0.2s;
  }
  .partner:hover {
    border-color: var(--blue);
    box-shadow: 0 4px 16px rgba(42,75,255,0.1);
  }
  .partner-check {
    color: var(--green);
    font-size: 18px;
  }
  .partner-more {
    background: var(--grad-soft);
    border-color: rgba(42,75,255,0.2);
    color: var(--blue);
  }
  
  /* ============ COMPARE ============ */
  .compare {
    padding: 100px 0;
    background: var(--bg-soft);
  }
  .compare-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 28px;
  }
  @media (max-width: 900px) { .compare-grid { grid-template-columns: 1fr; } }
  
  .compare-card {
    background: #fff;
    border-radius: 20px;
    padding: 40px 36px;
    border: 1px solid var(--line);
    box-shadow: var(--shadow-card);
  }
  .compare-card.after {
    border-color: rgba(42,75,255,0.25);
    box-shadow: 0 8px 32px rgba(42,75,255,0.1);
  }
  .compare-tag {
    display: inline-block;
    padding: 6px 14px;
    border-radius: 100px;
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.5px;
    margin-bottom: 20px;
  }
  .compare-tag.bad { background: #fef2f2; color: var(--pink); }
  .compare-tag.good { background: var(--green-soft); color: #15803d; }
  .compare-card h3 {
    font-size: 20px;
    font-weight: 800;
    margin-bottom: 24px;
    line-height: 1.3;
  }
  .c-list { list-style: none; }
  .c-list li {
    display: flex;
    gap: 12px;
    padding: 10px 0;
    font-size: 15px;
    font-weight: 600;
    border-bottom: 1px solid var(--line);
    color: var(--ink);
  }
  .c-list li:last-child { border-bottom: none; }
  .c-mark {
    font-size: 16px;
    font-weight: 900;
    flex-shrink: 0;
  }
  .c-mark.bad { color: var(--pink); }
  .c-mark.good { color: var(--green); }
  
  /* ============ WHO ============ */
  .who {
    padding: 100px 0;
    background: #fff;
  }
  .who-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
  }
  @media (max-width: 900px) { .who-grid { grid-template-columns: 1fr; } }
  
  .who-card {
    background: var(--bg-soft);
    border-radius: 20px;
    padding: 40px 32px;
    border: 1px solid var(--line);
    transition: all 0.25s;
  }
  .who-card:hover {
    border-color: rgba(42,75,255,0.25);
    box-shadow: 0 8px 32px rgba(42,75,255,0.08);
    transform: translateY(-4px);
  }
  .who-ico {
    width: 56px; height: 56px;
    border-radius: 14px;
    background: var(--grad);
    color: #fff;
    display: grid;
    place-items: center;
    margin-bottom: 24px;
  }
  .who-card h3 {
    font-size: 20px;
    font-weight: 800;
    margin-bottom: 14px;
  }
  .who-card p {
    font-size: 15px;
    color: var(--ink-soft);
    line-height: 1.6;
  }
  
  /* ============ STATS ============ */
  .stats {
    padding: 80px 0;
    background: var(--bg-soft);
  }
  .stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
  }
  @media (max-width: 900px) { .stats-grid { grid-template-columns: 1fr 1fr; } }
  
  .stat {
    text-align: center;
    padding: 24px;
  }
  .stat-num {
    font-size: clamp(40px, 5vw, 56px);
    font-weight: 900;
    line-height: 1;
    margin-bottom: 10px;
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.02em;
  }
  .stat-label {
    color: var(--ink-soft);
    font-size: 14px;
    font-weight: 700;
  }
  
  /* ============ CTA ============ */
  .cta {
    padding: 120px 0;
    text-align: center;
    background: #fff;
  }
  .cta h2 {
    font-size: clamp(36px, 5vw, 56px);
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 20px;
    max-width: 20ch;
    margin-left: auto;
    margin-right: auto;
  }
  .cta p {
    font-size: 18px;
    color: var(--ink-soft);
    max-width: 56ch;
    margin: 0 auto 36px;
  }
  .cta p a { color: var(--blue); font-weight: 800; text-decoration: none; }
  .cta p a:hover { text-decoration: underline; }
  .cta-btns {
    display: flex;
    gap: 14px;
    justify-content: center;
    flex-wrap: wrap;
  }
  
  /* ============ FOOTER ============ */
  footer {
    background: var(--footer);
    color: #fff;
    padding: 64px 0 32px;
  }
  .foot-grid {
    display: grid;
    grid-template-columns: 1fr 2fr 2fr 2fr;
    gap: 40px;
    margin-bottom: 48px;
  }
  @media (max-width: 900px) {
    .foot-grid { grid-template-columns: 1fr 1fr; }
  }
  @media (max-width: 560px) {
    .foot-grid { grid-template-columns: 1fr; }
  }
  .foot-col h4 {
    font-size: 13px;
    letter-spacing: 1.5px;
    font-weight: 800;
    margin-bottom: 20px;
    color: rgba(255,255,255,0.95);
  }
  .foot-col a {
    display: block;
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    font-size: 15px;
    margin-bottom: 12px;
    transition: color 0.2s;
  }
  .foot-col a:hover { color: #fff; }
  .foot-logo {
    width: 48px; height: 48px;
    background: rgba(255,255,255,0.1);
    border-radius: 10px;
    display: grid;
    place-items: center;
    color: #fff;
  }
  .foot-contact {
    display: flex;
    align-items: center;
    gap: 8px;
    color: rgba(255,255,255,0.85);
    font-size: 15px;
    margin-bottom: 12px;
  }
  .foot-bar {
    padding-top: 24px;
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 13px;
    color: rgba(255,255,255,0.5);
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
  }
  
  /* ============ ANIMATIONS ============ */
  @keyframes fadeUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
  }
  .hero h1, .hero p.lead, .hero-ctas, .eyebrow-chip, .hero-card {
    animation: fadeUp 0.8s ease-out backwards;
  }
  .eyebrow-chip { animation-delay: 0.05s; }
  .hero h1 { animation-delay: 0.15s; }
  .hero p.lead { animation-delay: 0.25s; }
  .hero-ctas { animation-delay: 0.35s; }
  .hero-card { animation-delay: 0.4s; }