:root {
            --primary-color: #8b0000;
            --secondary-color: #333;
            --accent-color: #ff6b6b;
            --light-bg: #f8f9fa;
            --dark-text: #212529;
        }
        body {
            font-family: 'Helvetica Neue', Arial, 'Microsoft YaHei', sans-serif;
            color: var(--dark-text);
            line-height: 1.8;
            overflow-x: hidden;
        }
        header {
            background: linear-gradient(rgba(0,0,0,0.8), rgba(0,0,0,0.9)), url('https://picsum.photos/seed/header/1920/600') center/cover no-repeat;
            color: white;
            padding: 100px 0;
        }
        .navbar {
            background-color: var(--secondary-color);
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .navbar-brand {
            font-weight: bold;
            font-size: 1.8rem;
            color: var(--accent-color) !important;
        }
        .nav-link {
            color: #ddd !important;
            transition: color 0.3s;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--accent-color) !important;
        }
        section {
            padding: 80px 0;
        }
        .section-title {
            font-size: 2.5rem;
            margin-bottom: 40px;
            color: var(--primary-color);
            border-left: 5px solid var(--accent-color);
            padding-left: 20px;
        }
        .card {
            border: none;
            box-shadow: 0 6px 15px rgba(0,0,0,0.1);
            transition: transform 0.3s, box-shadow 0.3s;
            margin-bottom: 30px;
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 12px 25px rgba(0,0,0,0.2);
        }
        .card-img-top {
            height: 250px;
            object-fit: cover;
        }
        .btn-primary {
            background-color: var(--primary-color);
            border: none;
            padding: 12px 30px;
            border-radius: 30px;
            transition: background-color 0.3s;
        }
        .btn-primary:hover {
            background-color: var(--accent-color);
        }
        .video-container {
            position: relative;
            padding-bottom: 56.25%;
            height: 0;
            overflow: hidden;
            border-radius: 10px;
        }
        .video-container iframe {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
        }
        .flink {
            display: inline-block;
            padding: 10px 20px;
            margin: 10px;
            background: var(--light-bg);
            border-radius: 5px;
            color: var(--secondary-color);
            text-decoration: none;
            transition: all 0.3s;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            transform: scale(1.05);
        }
        footer {
            background-color: var(--secondary-color);
            color: #ddd;
            padding: 40px 0;
        }
        .social-icons a {
            color: #ddd;
            font-size: 1.5rem;
            margin: 0 10px;
            transition: color 0.3s;
        }
        .social-icons a:hover {
            color: var(--accent-color);
        }
        @media (max-width: 768px) {
            .section-title {
                font-size: 2rem;
            }
            header {
                padding: 60px 0;
            }
            section {
                padding: 50px 0;
            }
        }
        .keyword-highlight {
            color: var(--primary-color);
            font-weight: bold;
        }
        .avatar-img {
            width: 200px;
            height: 200px;
            border-radius: 50%;
            object-fit: cover;
            border: 5px solid var(--accent-color);
        }