<style>
    *{margin:0;padding:0;box-sizing:border-box;}
    body{font-family:system-ui,-apple-system,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;background:#f5f7fc;color:#1e293b;line-height:1.5;overflow-x:hidden;}
    .container{max-width:1280px;margin:0 auto;padding:0 24px;}
    header{background:rgba(255,255,255,0.85);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid rgba(0,0,0,0.04);position:sticky;top:0;z-index:50;}
    .header-inner{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;padding:14px 0;}
    .logo{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:700;font-size:1.9rem;color:#0b2b5c;letter-spacing:-0.5px;}
    .logo svg{width:42px;height:42px;border-radius:12px;background:linear-gradient(145deg,#1a5fe0,#5b9cf5);box-shadow:0 10px 20px rgba(30,110,240,0.25);}
    nav{display:flex;align-items:center;gap:22px;flex-wrap:wrap;}
    nav a{text-decoration:none;color:#334155;font-weight:500;font-size:0.95rem;transition:0.2s;padding:4px 2px;}
    nav a:hover{color:#1e6ef0;}
    .btn-primary{background:linear-gradient(135deg,#1e6ef0,#3b82f6);color:white;border:none;padding:12px 28px;border-radius:40px;font-weight:600;font-size:0.95rem;cursor:pointer;text-decoration:none;display:inline-block;transition:0.3s;box-shadow:0 10px 22px rgba(30,110,240,0.35);}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 30px rgba(30,110,240,0.45);}
    .btn-outline{background:white;color:#1e6ef0;border:2px solid #1e6ef0;padding:12px 28px;border-radius:40px;font-weight:600;text-decoration:none;display:inline-block;transition:0.3s;}
    .btn-outline:hover{background:#eef3ff;}
    .section{padding:60px 0;}
    h1{font-size:2.8rem;font-weight:750;color:#061f45;margin-bottom:15px;letter-spacing:-0.8px;}
    h2{font-size:2.1rem;font-weight:700;margin-bottom:12px;color:#0b2b5c;text-align:center;}
    .subtitle{text-align:center;color:#64748b;margin-bottom:40px;font-size:1.05rem;}
    .intro-text{font-size:1.15rem;max-width:850px;margin:0 auto 40px;color:#475569;text-align:center;line-height:1.7;}
    .version-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:26px;margin:30px 0;}
    .version-card{background:white;border-radius:28px;padding:34px 24px;text-align:center;box-shadow:0 18px 38px rgba(0,0,0,0.04);transition:0.3s;display:flex;flex-direction:column;align-items:center;gap:14px;}
    .version-card:hover{transform:translateY(-6px);box-shadow:0 28px 50px rgba(30,110,240,0.12);}
    .version-icon{font-size:3.4rem;margin-bottom:6px;}
    .version-badge{background:#eef3ff;color:#1e6ef0;padding:5px 16px;border-radius:20px;font-weight:600;font-size:0.9rem;}
    .steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin:30px 0;}
    .step-card{background:white;border-radius:24px;padding:28px 18px;text-align:center;box-shadow:0 12px 28px rgba(0,0,0,0.03);}
    .step-num{background:#1e6ef0;color:white;width:44px;height:44px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:1.2rem;margin-bottom:14px;}
    .faq-container{background:white;border-radius:28px;padding:28px 32px;box-shadow:0 14px 30px rgba(0,0,0,0.03);}
    .faq-item{border-bottom:1px solid #eef2f8;padding:18px 0;}
    .faq-item:last-child{border-bottom:none;}
    .faq-question{font-weight:650;font-size:1.05rem;cursor:pointer;display:flex;justify-content:space-between;align-items:center;color:#0f2b4a;}
    .faq-question:hover{color:#1e6ef0;}
    .faq-answer{margin-top:12px;color:#475569;display:none;line-height:1.6;}
    .faq-item.open .faq-answer{display:block;}
    .nav-cards{display:flex;gap:20px;flex-wrap:wrap;margin:25px 0;}
    .nav-card{flex:1;min-width:180px;background:white;border-radius:20px;padding:24px;text-align:center;text-decoration:none;color:#1e293b;box-shadow:0 10px 24px rgba(0,0,0,0.03);transition:0.25s;}
    .nav-card:hover{background:#f0f5ff;transform:translateY(-3px);}
    .nav-card span{font-size:2.2rem;display:block;margin-bottom:10px;}
    .download-banner{background:linear-gradient(135deg,#eef3fd,#ffffff);border-radius:28px;padding:38px;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:22px;margin:35px 0;}
    footer{background:#0b1e33;color:#cbd5e1;padding:55px 0 30px;margin-top:50px;border-radius:35px 35px 0 0;}
    footer a{color:#94a3b8;text-decoration:none;}
    .footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;}
    @media(max-width:768px){
      .steps-grid{grid-template-columns:1fr 1fr;}
      .footer-grid{grid-template-columns:1fr 1fr;}
      h1{font-size:2.2rem;}
    }
  </style>