* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: #f4f7fb;
    color: #1f2937;
}

.hero {
    background: radial-gradient(circle at top, #063f91 0%, #041d4d 55%, #020f2e 100%);
    color: white;
    padding: 70px 20px 80px;
    text-align: center;
}

.hero-content {
    max-width: 1000px;
    margin: auto;
}

.logo {
    max-width: 520px;
    width: 90%;
    margin-bottom: 30px;
}

.hero h1 {
    font-size: 46px;
    margin: 10px 0 20px;
}

.subtitle {
    max-width: 850px;
    margin: auto;
    font-size: 22px;
    line-height: 1.5;
    color: #e5efff;
}

.hero-buttons {
    margin-top: 32px;
}

.btn {
    display: inline-block;
    padding: 14px 22px;
    border-radius: 10px;
    text-decoration: none;
    font-weight: bold;
    margin: 6px;
}

.btn.primary {
    background: #ffd91a;
    color: #061a40;
}

.btn.primary:hover {
    background: #facc15;
}

.btn.secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn.secondary:hover {
    background: white;
    color: #061a40;
}

.main-nav {
    background: #061a40;
    padding: 14px 10px;
    text-align: center;
    position: sticky;
    top: 0;
    z-index: 10;
}

.main-nav a {
    color: white;
    text-decoration: none;
    margin: 8px 12px;
    display: inline-block;
    font-weight: bold;
    font-size: 15px;
}

.main-nav a:hover {
    color: #ffd91a;
}

.container {
    max-width: 1150px;
    margin: auto;
    padding: 50px 20px;
}

.intro-section {
    background: white;
}

.intro-section h2,
.features-section h2,
.method-section h2,
.cta-section h2 {
    font-size: 34px;
    color: #061a40;
    margin-top: 0;
    text-align: center;
}

.intro-section p {
    max-width: 900px;
    margin: 18px auto;
    font-size: 20px;
    line-height: 1.7;
    text-align: center;
}

.features-section {
    background: #f4f7fb;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 22px;
    margin-top: 30px;
}

.card {
    background: white;
    padding: 26px;
    border-radius: 18px;
    box-shadow: 0 6px 18px rgba(0,0,0,0.08);
    border-top: 5px solid #1597f5;
}

.card h3 {
    margin-top: 0;
    color: #063f91;
    font-size: 23px;
}

.card p {
    line-height: 1.6;
    font-size: 17px;
}

.card a {
    display: inline-block;
    margin-top: 10px;
    background: #1597f5;
    color: white;
    padding: 10px 14px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
}

.card a:hover {
    background: #063f91;
}

.method-section {
    background: white;
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 22px;
    margin-top: 30px;
}

.step {
    text-align: center;
    background: #eef6ff;
    padding: 26px;
    border-radius: 18px;
}

.step span {
    display: inline-flex;
    width: 54px;
    height: 54px;
    background: #ffd91a;
    color: #061a40;
    border-radius: 50%;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 12px;
}

.step h3 {
    color: #063f91;
    margin: 8px 0;
}

.step p {
    font-size: 17px;
    line-height: 1.5;
}

.cta-section {
    background: linear-gradient(135deg, #063f91, #1597f5);
    color: white;
    text-align: center;
}

.cta-section h2 {
    color: white;
}

.cta-section p {
    font-size: 20px;
    line-height: 1.6;
    max-width: 800px;
    margin: 0 auto 24px;
}

footer {
    background: #020f2e;
    color: white;
    text-align: center;
    padding: 25px;
    font-size: 15px;
}

@media screen and (max-width: 700px) {
    .hero {
        padding: 45px 15px 55px;
    }

    .hero h1 {
        font-size: 34px;
    }

    .subtitle {
        font-size: 18px;
    }

    .logo {
        width: 95%;
    }

    .intro-section h2,
    .features-section h2,
    .method-section h2,
    .cta-section h2 {
        font-size: 28px;
    }

    .intro-section p {
        font-size: 18px;
        text-align: left;
    }

    .main-nav {
        position: static;
    }

    .main-nav a {
        display: block;
        margin: 10px 0;
    }
}