:root{
    --tc-blue:#2563eb;
    --tc-blue-dark:#1746a2;
    --tc-navy:#0f2f5f;
    --tc-navy-dark:#071f44;
    --tc-bg:#f6f8fb;
    --tc-card:#ffffff;
    --tc-border:#e5e7eb;
    --tc-text:#1f2937;
    --tc-muted:#6b7280;
}

*{
    box-sizing:border-box;
}

body{
    margin:0;
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
    background:#ffffff;
    color:var(--tc-text);
}

.site-shell{
    min-height:100vh;
    display:flex;
    flex-direction:column;
}

.site-header{
    background:rgba(255,255,255,.94);
    border-bottom:1px solid var(--tc-border);
    position:sticky;
    top:0;
    z-index:20;
    backdrop-filter:blur(10px);
}

.site-header-inner{
    max-width:1180px;
    margin:0 auto;
    padding:14px 28px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:24px;
}

.brand{
    display:flex;
    align-items:center;
    text-decoration:none;
}

.brand-logo{
    width:220px;
    max-width:46vw;
    height:auto;
    display:block;
}

.site-nav{
    display:flex;
    align-items:center;
    justify-content:flex-end;
    gap:10px;
    flex-wrap:wrap;
}

.site-nav a{
    color:var(--tc-navy);
    text-decoration:none;
    font-size:14px;
    font-weight:700;
    padding:8px 10px;
    border-radius:8px;
}

.site-nav a:hover{
    background:#eef6ff;
    color:var(--tc-navy-dark);
}

main{
    flex:1;
}

.hero{
    background:linear-gradient(180deg,#ffffff 0%,#f6f8fb 100%);
    padding:30px 28px 76px;
    text-align:center;
}

.hero-content{
    max-width:980px;
    margin:0 auto;
}

.hero-logo{
    width:420px;
    max-width:88vw;
    height:auto;
    display:block;
    margin:0 auto 18px;
}

.hero h1{
    font-size:54px;
    line-height:1.05;
    letter-spacing:-1.4px;
    color:var(--tc-navy-dark);
    margin:0 0 18px;
}

.hero p{
    font-size:22px;
    line-height:1.6;
    color:#4b5563;
    max-width:820px;
    margin:0 auto;
}

.hero-actions{
    margin-top:34px;
    display:flex;
    justify-content:center;
    gap:14px;
    flex-wrap:wrap;
}

.btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    padding:14px 22px;
    border-radius:10px;
    text-decoration:none;
    font-weight:750;
    border:1px solid transparent;
}

.btn-primary{
    background:var(--tc-navy-dark);
    color:#ffffff;
    border-color:var(--tc-navy-dark);
}

.btn-primary:hover{
    background:#020617;
}

.btn-secondary{
    background:#ffffff;
    color:var(--tc-navy);
    border-color:#d1d5db;
}

.btn-secondary:hover{
    background:#f8fafc;
}

.section{
    max-width:1180px;
    margin:0 auto;
    padding:70px 28px 0;
}

.section-header{
    text-align:center;
    margin-bottom:32px;
}

.section-header h2,
.about-card h2{
    color:var(--tc-navy-dark);
    font-size:36px;
    line-height:1.15;
    margin:0 0 10px;
    letter-spacing:-.6px;
}

.section-header p{
    color:var(--tc-muted);
    font-size:18px;
    margin:0;
}

.product-grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
    gap:26px;
}

.product-card,
.about-card{
    background:var(--tc-card);
    border:1px solid var(--tc-border);
    border-radius:16px;
    padding:28px;
    box-shadow:0 12px 32px rgba(15,23,42,.06);
}

.product-card h3{
    margin:0 0 12px;
    font-size:24px;
    color:var(--tc-navy-dark);
}

.product-card p,
.about-card p{
    color:#4b5563;
    line-height:1.7;
    margin:0 0 18px;
}

.product-card a,
.site-footer a{
    color:var(--tc-navy);
    font-weight:750;
    text-decoration:none;
}

.product-card a:hover,
.site-footer a:hover{
    text-decoration:underline;
}

.about-section{
    padding-bottom:20px;
}

.about-card{
    max-width:900px;
    margin:0 auto;
    text-align:center;
}

.site-footer{
    margin-top:80px;
    padding:28px;
    border-top:1px solid var(--tc-border);
    text-align:center;
    color:var(--tc-muted);
    font-size:14px;
}

.footer-links{
    margin-top:8px;
    display:flex;
    align-items:center;
    justify-content:center;
    gap:10px;
    flex-wrap:wrap;
}

@media (max-width:760px){
    .site-header-inner{
        flex-direction:column;
        align-items:flex-start;
        padding:14px 20px;
        gap:10px;
    }

    .brand-logo{
        width:190px;
        max-width:72vw;
    }

    .site-nav{
        justify-content:flex-start;
    }

    .hero{
        padding:48px 20px 58px;
    }

    .hero h1{
        font-size:38px;
    }

    .hero p{
        font-size:19px;
    }

    .section{
        padding:52px 20px 0;
    }

    .section-header h2,
    .about-card h2{
        font-size:30px;
    }
}