:root {
            --primary: #002E6E;
            --accent: #0066FF;
            --text: #1E293B;
            --subtext: #64748B;
            --border: #E2E8F0;
            --bg: #FAFBFF;
            --pill-gray: #94A3B8;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            -webkit-font-smoothing: antialiased;
        }

        body {
            font-family: 'Noto Sans KR', sans-serif;
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.5;
            background-image: 
                linear-gradient(var(--border) 1px, transparent 1px),
                linear-gradient(90deg, var(--border) 1px, transparent 1px);
            background-size: 40px 40px;
        }

        .section-label {
            font-family: 'Inter', sans-serif;
            font-size: 11px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.1em;
            color: var(--accent);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .section-label::before {
            content: '';
            width: 24px;
            height: 1px;
            background: var(--accent);
        }

        nav {
            position: fixed;
            top: 0;
            width: 100%;
            height: 80px;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border);
            display: flex;
            align-items: center;
            padding: 0 5%;
            z-index: 1000;
            justify-content: space-between;
        }

        .logo {
            font-weight: 900;
            font-size: 22px;
            color: var(--primary);
            letter-spacing: -0.05em;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .logo-mark {
            width: 32px;
            height: 32px;
            background: var(--primary);
            border-radius: 4px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 14px;
        }

        .nav-links {
            display: flex;
            gap: 32px;
        }

        .nav-links a {
            text-decoration: none;
            color: var(--text);
            font-size: 14px;
            font-weight: 500;
            transition: color 0.2s;
        }

        .nav-links a:hover {
            color: var(--accent);
        }

        
        .sub-hero {
            padding: 180px 5% 100px;
            background: linear-gradient(rgba(0, 46, 110, 0.8), rgba(0, 46, 110, 0.8)), url('../img/generated-projects/yangju-logistics-warehouse.png');
            background-size: cover;
            background-position: center;
            color: white;
            text-align: center;
        }

        .sub-hero h1 {
            font-size: 48px;
            font-weight: 900;
            margin-bottom: 16px;
        }

        .sub-hero p {
            font-size: 18px;
            opacity: 0.9;
            max-width: 600px;
            margin: 0 auto;
        }

        
        .business-container {
            padding: 100px 5%;
            max-width: 1400px;
            margin: 0 auto;
        }

        .service-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
            gap: 32px;
            margin-top: 60px;
        }

        .service-card {
            background: white;
            border: 1px solid var(--border);
            padding: 48px;
            transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
            position: relative;
            display: flex;
            flex-direction: column;
        }

        .service-card:hover {
            background: var(--primary);
            transform: translateY(-10px);
            border-color: var(--primary);
            box-shadow: 0 20px 40px rgba(0, 46, 110, 0.15);
        }

        .service-icon {
            width: 56px;
            height: 56px;
            margin-bottom: 32px;
            color: var(--accent);
            transition: color 0.3s;
        }

        .service-card:hover .service-icon {
            color: white;
        }

        .service-card h3 {
            font-size: 24px;
            font-weight: 800;
            margin-bottom: 16px;
            color: var(--primary);
            transition: color 0.3s;
        }

        .service-card:hover h3 {
            color: white;
        }

        .service-desc {
            color: var(--subtext);
            font-size: 15px;
            margin-bottom: 32px;
            line-height: 1.7;
            transition: color 0.3s;
        }

        .service-card:hover .service-desc {
            color: rgba(255, 255, 255, 0.7);
        }

        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 40px;
        }

        .tag {
            font-size: 12px;
            padding: 6px 14px;
            background: var(--bg);
            border-radius: 20px;
            color: var(--primary);
            font-weight: 600;
            transition: all 0.3s;
        }

        .service-card:hover .tag {
            background: rgba(255, 255, 255, 0.1);
            color: white;
        }

        .project-links {
            margin-top: auto;
            border-top: 1px solid var(--border);
            padding-top: 24px;
            transition: border-color 0.3s;
        }

        .service-card:hover .project-links {
            border-top-color: rgba(255, 255, 255, 0.1);
        }

        .link-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            text-decoration: none;
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 12px;
            transition: color 0.3s;
        }

        .link-item:hover {
            color: var(--accent);
        }

        .service-card:hover .link-item {
            color: white;
        }

        .link-item:hover {
            text-decoration: underline;
        }

        footer {
            padding: 40px 5%;
            background: #001a3d;
            color: rgba(255,255,255,0.5);
            font-size: 12px;
            border-top: 1px solid rgba(255,255,255,0.1);
            display: flex;
            justify-content: space-between;
        }

        @media (max-width: 1024px) {
            .service-grid { grid-template-columns: 1fr; }
            .sub-hero h1 { font-size: 32px; }
        }
    
        @media (max-width: 768px) {
            nav { padding: 0 20px; height: 72px; }
            .nav-links { display: none; }
            nav .btn-group a { padding: 9px 13px !important; font-size: 11px !important; }
            .logo { font-size: 15px; white-space: nowrap; }
            footer { gap: 12px; flex-direction: column; }
        }