body {
    font-family: Arial, "Noto Sans KR", sans-serif;
    margin: 0;
    color: #1f2933;
    line-height: 1.7;
    background: #ffffff;
}

nav {
    background: #0F3D61;
    padding: 10px 40px;
    display: flex;
    align-items: center;
    gap: 28px;
}

nav a {
    color: white;
    text-decoration: none;
    margin: 0 10px;
    font-weight: 600;
    font-size: 16px;
}

nav a:hover {
    color: #a8d5ff;
}

header {
    background: linear-gradient(135deg, #0F3D61, #0B2F4B);
    color: white;
    text-align: center;
    padding: 45px 20px;
}

header h1 {
    font-size: 36px;
    margin-bottom: 10px;
    color: white;
}

header p {
    font-size: 18px;
    margin-bottom: 30px;
}

header img {
    max-width: 100%;
    height: auto;
}

section {
    max-width: 1100px;
    margin: auto;
    padding: 60px 24px;
}

h1, h2 {
    color: #0F3D61;
}

h1 {
    font-size: 36px;
    margin-bottom: 30px;
}

h2 {
    font-size: 26px;
    margin-top: 30px;
}

.category,
.info-box {
    background: #f5f7fa;
    border: 1px solid #e1e7ef;
    padding: 28px;
    margin-bottom: 24px;
    border-radius: 14px;
}

.button {
    display: inline-block;
    margin-top: 14px;
    padding: 12px 22px;
    background: #0F3D61;
    color: white;
    text-decoration: none;
    border-radius: 6px;
    font-weight: bold;
}

.button:hover {
    background: #145ea8;
}

footer {
    background: #102a43;
    color: white;
    text-align: center;
    padding: 24px;
    margin-top: 40px;
}
footer p {
    margin: 6px 0;
    font-size: 14px;
}

@media (max-width: 768px) {
    nav a {
        display: block;
        margin: 8px 0;
    }

    header h1 {
        font-size: 32px;
    }

    section {
        padding: 40px 18px;
    }
}

.subtitle {
    font-size: 24px;
    font-weight: 600;
    margin-top: 20px;
    color: white;
}

.description {
    font-size: 18px;
    color: #d9e2ec;
}

.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-content {
    display: none;
    position: absolute;
    background: white;
    min-width: 250px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.15);
    border-radius: 8px;
    overflow: hidden;
    z-index: 1000;
}

.dropdown-content a {
    color: #0d3b66;
    padding: 12px 16px;
    display: block;
    text-align: left;
    margin: 0;
}

.dropdown-content a:hover {
    background: #f5f7fa;
}

.dropdown:hover .dropdown-content {
    display: block;
}
.product-card {
    display: flex;
    gap: 24px;
    align-items: center;
    background: #f5f7fa;
    border: 1px solid #e1e7ef;
    padding: 28px;
    margin-bottom: 24px;
    border-radius: 14px;
}

.product-image {
    width: 180px;
    height: 120px;
    background: #d9e2ec;
    border-radius: 10px;
    flex-shrink: 0;
}

.product-text h2 {
    margin-top: 0;
}

@media (max-width: 768px) {
    .product-card {
        display: block;
    }

    .product-image {
        width: 100%;
        margin-bottom: 18px;
    }
}
body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

section {
    flex: 1;
}
.nav-logo {
    height: 48px;
    width: auto;
    display: block;
}

.logo-link {
    display: flex;
    align-items: center;
    margin-right: auto;
}

.product-image {
    width: 100%;
    max-width: 500px;
    display: block;
    margin: 30px auto;
}
.product-image {
    width: 100%;
    max-width: 500px;
    display: block;
    margin: 30px auto;
}

.hero-image {
    width: 100%;
    max-width: 900px;
    display: block;
    margin: 0 auto 30px auto;
    border-radius: 12px;
}
.main-hero {
    background:
        linear-gradient(rgba(13, 59, 102, 0.85), rgba(16, 42, 67, 0.85)),
        url("hero-image.png");
    background-size: cover;
    background-position: center;
    color: white;
    text-align: center;
    padding: 110px 20px;
}

.hero-content {
    max-width: 900px;
    margin: auto;
}

.main-hero h1 {
    color: white;
    font-size: 46px;
    margin-bottom: 20px;
}

.product-photo {
    max-width: 600px;
    width: 100%;
    height: auto;
    object-fit: contain;
    display: block;
    margin: 0 auto 40px auto;
}
.main-hero p {
    font-size: 21px;
    margin-bottom: 30px;
}
.sub-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 0 auto 36px auto;
    padding: 14px;
    background: #f5f7fa;
    border: 1px solid #e1e7ef;
    border-radius: 12px;
    justify-content: center;
}

.sub-nav a {
    color: #0F3D61;
    text-decoration: none;
    font-weight: 600;
    padding: 8px 14px;
    border-radius: 6px;
}

.sub-nav a:hover {
    background: #e1e7ef;
}
.form-input,
.form-textarea {
    width: 100%;
    max-width: 760px;
    padding: 12px;
    border: 1px solid #ccd6dd;
    border-radius: 6px;
    font-size: 15px;
    box-sizing: border-box;
}

.form-textarea {
    min-height: 180px;
    resize: vertical;
}

form label {
    font-weight: 600;
    color: #0F3D61;
}
.solution-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.solution-card {
    background: #f5f7fa;
    border: 1px solid #e1e7ef;
    border-radius: 14px;
    padding: 24px;

    display: flex;
    flex-direction: column;

    min-height: 500px;
}
.solution-card img {
    width: 100%;
    height: 260px;

    object-fit: contain;

    background: #f5f7fa;

    display: block;
    margin: 0 auto 20px auto;
}
.solution-card .button {
    margin-top: auto;
}
.solution-card h3 {
    color: #0F3D61;
    font-size: 24px;
    margin-bottom: 12px;
}

@media (max-width: 768px) {
    .solution-grid {
        grid-template-columns: 1fr;
    }
}
.product-summary {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 40px;
    align-items: center;
    margin-bottom: 40px;
}

.product-summary-image {
    width: 100%;
    max-height: 360px;
    object-fit: contain;
}

.product-summary-text h2 {
    margin-top: 0;
}

.product-summary-text ul {
    padding-left: 20px;
}

@media (max-width: 768px) {
    .product-summary {
        grid-template-columns: 1fr;
    }
}