:root {
            --ncl-blue: #0a2c6d;
            --ncl-light-blue: #1e88e5;
            --ncl-accent: #ff9800;
            --ncl-gray: #f5f7fa;
            --ncl-dark: #333;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            color: var(--ncl-dark);
            line-height: 1.7;
        }
        h1, h2, h3, h4, h5 {
            color: var(--ncl-blue);
            font-weight: 700;
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
        }
        .navbar-nav .nav-link {
            font-weight: 600;
            padding: 0.5rem 1.2rem !important;
            transition: all 0.3s;
        }
        .navbar-nav .nav-link:hover {
            color: var(--ncl-accent) !important;
            transform: translateY(-2px);
        }
        .hero-section {
            background: linear-gradient(rgba(10, 44, 109, 0.85), rgba(10, 44, 109, 0.9)), url('https://images.unsplash.com/photo-1532187863486-abf9dbad1b69?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80') no-repeat center center/cover;
            color: white;
            padding: 120px 0 100px;
        }
        .hero-section h1 {
            color: white;
            font-size: 3.5rem;
            text-shadow: 2px 2px 8px rgba(0,0,0,0.3);
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 40px;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 80px;
            height: 4px;
            background: var(--ncl-accent);
        }
        .section-title.text-center::after {
            left: 50%;
            transform: translateX(-50%);
        }
        .feature-icon {
            background: linear-gradient(135deg, var(--ncl-light-blue), var(--ncl-blue));
            width: 80px;
            height: 80px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 25px;
            color: white;
            font-size: 2rem;
            transition: all 0.4s;
        }
        .card {
            border: none;
            border-radius: 12px;
            box-shadow: 0 8px 25px rgba(0,0,0,0.08);
            transition: transform 0.4s, box-shadow 0.4s;
            height: 100%;
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 35px rgba(0,0,0,0.15);
        }
        .card-title {
            color: var(--ncl-blue);
        }
        .btn-ncl {
            background: linear-gradient(to right, var(--ncl-blue), var(--ncl-light-blue));
            color: white;
            padding: 12px 30px;
            border-radius: 30px;
            border: none;
            font-weight: 600;
            transition: all 0.3s;
        }
        .btn-ncl:hover {
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(30, 136, 229, 0.3);
        }
        .research-area {
            padding: 30px;
            border-left: 5px solid var(--ncl-accent);
            background: var(--ncl-gray);
            margin-bottom: 25px;
            height: 100%;
        }
        .news-item {
            border-bottom: 1px solid #eee;
            padding-bottom: 20px;
            margin-bottom: 20px;
        }
        .news-date {
            background: var(--ncl-blue);
            color: white;
            padding: 5px 15px;
            border-radius: 20px;
            display: inline-block;
            font-size: 0.9rem;
        }
        friendlink {
            display: block;
            margin-top: 50px;
            padding-top: 30px;
            border-top: 2px solid var(--ncl-gray);
        }
        .flink {
            display: inline-block;
            background: white;
            padding: 10px 25px;
            margin: 8px 12px;
            border-radius: 8px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.05);
            color: var(--ncl-dark);
            text-decoration: none;
            font-weight: 600;
            transition: all 0.3s;
        }
        .flink:hover {
            background: var(--ncl-blue);
            color: white;
            transform: scale(1.05);
        }
        footer {
            background: var(--ncl-blue);
            color: white;
            padding-top: 60px;
        }
        footer a {
            color: #d0e4ff;
            text-decoration: none;
            transition: color 0.3s;
        }
        footer a:hover {
            color: white;
            text-decoration: underline;
        }
        .footer-bottom {
            background: rgba(0,0,0,0.2);
            padding: 20px 0;
            margin-top: 40px;
        }
        .contact-info li {
            margin-bottom: 15px;
            padding-left: 30px;
            position: relative;
        }
        .contact-info li i {
            position: absolute;
            left: 0;
            top: 5px;
            color: var(--ncl-accent);
        }
        @media (max-width: 768px) {
            .hero-section h1 {
                font-size: 2.5rem;
            }
            .hero-section {
                padding: 80px 0 60px;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }
        .sticky-nav {
            position: sticky;
            top: 0;
            z-index: 1020;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: var(--ncl-accent);
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            z-index: 1000;
            opacity: 0;
            transition: opacity 0.3s;
        }
        .back-to-top.show {
            opacity: 1;
        }