body {
    background: #f3f3f3;
    color: #1f2937;
}

.site-header {
    background: linear-gradient(90deg, #1775ef 0%, #1f6be8 100%);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.05);
}

.site-header .navbar {
    padding-top: 10px;
    padding-bottom: 10px;
}

.site-header .nav-link {
    color: #ffffff;
    font-size: 14px;
    font-weight: 600;
}

.site-header .nav-link:hover,
.site-header .nav-link.active {
    color: #ffffff;
    opacity: 0.9;
}

.hero-section {
    padding: 34px 0 18px;
    text-align: center;
}

.hero-title {
    font-size: 72px;
    line-height: 1.05;
    font-weight: 800;
    color: #33498f;
    margin-bottom: 8px;
}

.hero-subtitle {
    font-size: 36px;
    font-weight: 500;
    color: #4f629b;
    margin-bottom: 0;
}

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

.converter-card {
    background: #ffffff;
    border: 1px solid #d9d9d9;
    border-radius: 18px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
    overflow: hidden;
    height: 100%;
    transition: all 0.2s ease;
}

.converter-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.07);
}

.converter-head {
    padding: 28px 26px 18px;
    background: #f8fbff;
    border-bottom: 1px solid #edf2f9;
}

.converter-title {
    margin: 0;
    font-size: 18px;
    font-weight: 700;
    color: #31478b;
    display: flex;
    align-items: center;
    gap: 12px;
}

.converter-title i {
    color: #31478b;
    font-size: 18px;
    width: 20px;
    text-align: center;
}

.converter-title a {
    color: inherit;
    text-decoration: none;
}

.converter-title a:hover {
    color: #1f6be8;
}

.converter-links {
    padding: 14px 26px 24px;
}

.converter-links a {
    display: inline-block;
    margin: 10px 10px 0 0;
    padding: 10px 16px;
    border-radius: 12px;
    background: #edf3fd;
    color: #31478b;
    text-decoration: none;
    font-size: 14px;
    font-weight: 700;
    transition: all 0.2s ease;
}

.converter-links a:hover {
    background: #1f7ae0;
    color: #ffffff;
}

.why-section {
    padding: 36px 0 60px;
}

.section-title {
    font-size: 28px;
    font-weight: 500;
    color: #111827;
    text-align: center;
    margin-bottom: 26px;
}

.feature-card {
    background: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: 6px;
    padding: 40px 24px;
    text-align: center;
    height: 100%;
    min-height: 220px;
}

.feature-icon {
    font-size: 46px;
    color: #1f7ae0;
    margin-bottom: 18px;
}

.feature-card h4 {
    font-size: 20px;
    font-weight: 500;
    color: #222;
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 14px;
    color: #666;
    margin-bottom: 0;
}

.site-footer {
    background: linear-gradient(90deg, #1775ef 0%, #1f6be8 100%);
    color: #ffffff;
    padding: 24px 0 20px;
    margin-top: 24px;
}

.footer-copy {
    font-size: 14px;
    font-weight: 600;
}

.footer-social a {
    color: #ffffff;
    font-size: 18px;
    text-decoration: none;
}

.footer-social a:hover {
    opacity: 0.9;
}

@media (max-width: 1199px) {
    .hero-title {
        font-size: 58px;
    }

    .hero-subtitle {
        font-size: 30px;
    }
}

@media (max-width: 991px) {
    .hero-title {
        font-size: 46px;
    }

    .hero-subtitle {
        font-size: 24px;
    }
}

@media (max-width: 576px) {
    .hero-section {
        padding-top: 28px;
    }

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

    .hero-subtitle {
        font-size: 20px;
    }

    .converter-head {
        padding: 22px 18px 16px;
    }

    .converter-links {
        padding: 10px 18px 18px;
    }

    .feature-card {
        min-height: auto;
        padding: 32px 18px;
    }
}