:root {
    --primary-color: #0070C0;
    --secondary-color: #003366;
    --accent-color: #FF9900;
    --text-color: #333333;
    --text-light: #666666;
    --bg-light: #F5F7FA;
    --white: #FFFFFF;
    --border-color: #E1E1E1;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --container-width: 1200px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--white);
}

a {
    text-decoration: none;
    color: inherit;
    transition: 0.3s;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 80px 0;
}

.bg-light {
    background-color: var(--bg-light);
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--secondary-color);
}

h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 10px;
}

.section-subtitle {
    text-align: center;
    color: var(--primary-color);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 40px;
    display: block;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    text-align: center;
    border: none;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--white);
}

.btn-primary:hover {
    background-color: var(--secondary-color);
}

.btn-accent {
    background-color: var(--accent-color);
    color: var(--white);
}

.btn-accent:hover {
    filter: brightness(1.1);
}

/* Header */
header {
    background: var(--white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo img {
    height: 40px;
}

.nav-menu {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-link {
    font-weight: 500;
    color: var(--secondary-color);
}

.nav-link:hover {
    color: var(--primary-color);
}

/* Mobile Menu */
.hamburger {
    display: none;
    cursor: pointer;
}

.bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    background-color: var(--secondary-color);
    transition: all 0.3s ease-in-out;
}

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

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 80px;
        flex-direction: column;
        background-color: var(--white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-md);
        padding: 20px 0;
    }

    .nav-menu.active {
        left: 0;
    }
}

/* Hero Section */
.hero {
    padding: 100px 0;
    background: linear-gradient(135deg, #F5F7FA 0%, #E8ECF1 100%);
    overflow: hidden;
}

.hero-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
}

.hero-content {
    flex: 1;
}

.hero-content h1 {
    font-size: 3.5rem;
    color: var(--secondary-color);
    margin-bottom: 24px;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 32px;
    line-height: 1.6;
}

.hero-image {
    flex: 1;
}

.image-placeholder {
    width: 100%;
    height: 400px;
    background-color: #ddd;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #888;
    font-weight: bold;
    box-shadow: var(--shadow-lg);
}

@media (max-width: 900px) {
    .hero-container {
        flex-direction: column;
        text-align: center;
    }

    .hero-content h1 {
        font-size: 2.5rem;
    }
}

/* Sections Common */
.section-description {
    text-align: center;
    color: var(--text-light);
    max-width: 800px;
    margin: 0 auto 60px;
    font-size: 1.1rem;
}

/* Feature Cards (Section 1) */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.feature-card {
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: transform 0.3s ease;
    border: 1px solid var(--border-color);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    color: var(--primary-color);
    font-weight: bold;
}

.feature-card h3 {
    margin-bottom: 15px;
    color: var(--secondary-color);
}

/* Product Grid (Section 2) */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.product-card {
    background: var(--white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: 0.3s;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.product-placeholder {
    height: 200px;
    background-color: #eee;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #999;
    font-weight: bold;
}

.product-card h3 {
    padding: 20px 20px 10px;
    margin-bottom: 0;
    font-size: 1.25rem;
}

.product-card p {
    padding: 0 20px 30px;
    color: var(--text-light);
}

/* Service Differentiation (Section 3) */
.service-split {
    display: flex;
    align-items: center;
    gap: 50px;
    margin-top: 40px;
}

.service-content {
    flex: 1;
}

.service-image {
    flex: 1;
}

.benefit-list {
    margin: 30px 0;
}

.benefit-list li {
    margin-bottom: 20px;
    padding-left: 20px;
    border-left: 3px solid var(--accent-color);
}

.benefit-list strong {
    display: block;
    margin-bottom: 5px;
    color: var(--secondary-color);
    font-size: 1.1rem;
}

/* Marketing Enhancement (Section 4) */
.marketing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    max-width: 900px;
    margin: 40px auto;
}

.marketing-item {
    background: var(--white);
    padding: 30px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: flex-start;
    gap: 20px;
}

.marketing-icon {
    font-size: 2rem;
}

.marketing-text h3 {
    margin-bottom: 5px;
    font-size: 1.1rem;
}

.website-mockup {
    max-width: 800px;
    margin: 50px auto 0;
}

.website-mockup .image-placeholder {
    height: 300px;
}

@media (max-width: 768px) {
    .service-split {
        flex-direction: column-reverse;
    }
}

/* Trust & Professionalism (Section 5) */
.trust-container {
    display: flex;
    align-items: center;
    gap: 50px;
}

.trust-content {
    flex: 1;
}

.trust-image {
    flex: 1;
}

.trust-image .image-placeholder {
    height: 450px;
}

.quote {
    font-size: 1.5rem;
    font-style: italic;
    color: var(--primary-color);
    margin: 30px 0;
    font-weight: bold;
    border-left: 5px solid var(--accent-color);
    padding-left: 20px;
}

.contact-info {
    background: var(--bg-light);
    padding: 30px;
    border-radius: var(--radius-md);
}

.contact-info h3 {
    margin-bottom: 20px;
    font-size: 1.25rem;
}

.contact-info ul li {
    margin-bottom: 10px;
    font-size: 1.1rem;
}

@media (max-width: 768px) {
    .trust-container {
        flex-direction: column;
    }
}

/* Footer */
footer {
    background: var(--secondary-color);
    color: var(--white);
    padding: 60px 0;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.footer-logo img {
    height: 30px;
}

/* Dropdown Menu */
.nav-item {
    position: relative;
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--white);
    box-shadow: var(--shadow-md);
    border-radius: var(--radius-sm);
    padding: 10px 0;
    min-width: 200px;
    z-index: 1001;
}

.dropdown-menu li {
    display: block;
}

.dropdown-menu li a {
    display: block;
    padding: 10px 20px;
    color: var(--text-color);
    font-size: 0.95rem;
    transition: background-color 0.2s;
}

.dropdown-menu li a:hover {
    background-color: var(--bg-light);
    color: var(--primary-color);
}

.nav-item:hover .dropdown-menu {
    display: block;
}

/* Mobile Dropdown */
@media (max-width: 768px) {
    .dropdown-menu {
        position: static;
        box-shadow: none;
        display: none;
        /* Initially hidden */
        background-color: #f9f9f9;
        padding-left: 20px;
    }

    .nav-item.active .dropdown-menu {
        display: block;
        /* Show if toggled */
    }
}

/* Responsive Padding Adjustment */
@media (min-width: 769px) and (max-width: 1200px) {
    .container {
        padding: 0 60px;
        /* Double padding for generic container */
    }

    .header-container {
        padding: 0 40px;
        /* Slightly less for header if needed, or consistent */
    }
}

/* Unique Value Section Responsive */
@media (max-width: 768px) {
    .unique-value-block {
        flex-direction: column;
    }

    .trust-content.text-center .contact-info ul li {
        display: block;
        margin: 10px 0;
    }
}

/* Button Outline for Product Cards */
.btn-outline {
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
    background: transparent;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    display: inline-block;
}

.btn-outline:hover {
    background: var(--primary-color);
    color: var(--white);
}

/* 8-Card Grid for Desktop */
@media (min-width: 1024px) {
    .product-grid-8 {
        grid-template-columns: repeat(4, 1fr) !important;
    }
}