:root {
            --primary-color: #ff6b9d;
            --secondary-color: #5d3fd3;
            --dark-color: #1a1a2e;
            --light-color: #f8f9fa;
            --gray-color: #6c757d;
        }
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif;
            color: #333;
            line-height: 1.6;
            background-color: #fefefe;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color);
        }
        .nav-link {
            font-weight: 500;
            transition: color 0.3s;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary-color) !important;
        }
        .hero-section {
            background: linear-gradient(rgba(26, 26, 46, 0.85), rgba(93, 63, 211, 0.8)), url('https://images.unsplash.com/photo-1536440136628-849c177e76a1?ixlib=rb-4.0.3&auto=format&fit=crop&w=1925&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 120px 0;
            position: relative;
        }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 1rem;
            text-shadow: 2px 2px 5px rgba(0,0,0,0.5);
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }
        }
        .card {
            border: none;
            border-radius: 15px;
            overflow: hidden;
            transition: transform 0.3s, box-shadow 0.3s;
            margin-bottom: 30px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }
        .card-img-top {
            height: 250px;
            object-fit: cover;
            transition: transform 0.5s;
        }
        .card:hover .card-img-top {
            transform: scale(1.05);
        }
        .work-tag {
            display: inline-block;
            padding: 3px 10px;
            background-color: var(--primary-color);
            color: white;
            border-radius: 20px;
            font-size: 0.8rem;
            margin-right: 5px;
            margin-bottom: 5px;
        }
        .btn-primary-custom {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            color: white;
            padding: 10px 25px;
            border-radius: 30px;
            font-weight: 600;
            transition: all 0.3s;
        }
        .btn-primary-custom:hover {
            background-color: #e55a8a;
            border-color: #e55a8a;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(255, 107, 157, 0.3);
            color: white;
        }
        .btn-secondary-custom {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
            color: white;
            padding: 10px 25px;
            border-radius: 30px;
            font-weight: 600;
            transition: all 0.3s;
        }
        .btn-secondary-custom:hover {
            background-color: #4a32b0;
            border-color: #4a32b0;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(93, 63, 211, 0.3);
            color: white;
        }
        .section-title {
            position: relative;
            margin-bottom: 50px;
            text-align: center;
            font-weight: 700;
            color: var(--dark-color);
        }
        .section-title::after {
            content: '';
            position: absolute;
            width: 80px;
            height: 4px;
            background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
            bottom: -15px;
            left: 50%;
            transform: translateX(-50%);
            border-radius: 2px;
        }
        .footer {
            background-color: var(--dark-color);
            color: #ddd;
            padding: 60px 0 30px;
        }
        .footer a {
            color: #ddd;
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer a:hover {
            color: var(--primary-color);
        }
        .copyright {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 20px;
            margin-top: 40px;
            font-size: 0.9rem;
            color: #aaa;
        }
        .friendlink a.flink {
            display: inline-block;
            padding: 8px 20px;
            background-color: rgba(255,255,255,0.1);
            border-radius: 30px;
            margin: 5px 10px 5px 0;
            transition: all 0.3s;
            color: #ddd;
        }
        .friendlink a.flink:hover {
            background-color: var(--primary-color);
            color: white;
            transform: translateY(-3px);
        }
        .video-container {
            position: relative;
            padding-bottom: 56.25%; 
            height: 0;
            overflow: hidden;
            border-radius: 10px;
            margin-bottom: 30px;
        }
        .video-container iframe {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            border: none;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background-color: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            z-index: 1000;
            cursor: pointer;
            opacity: 0;
            transition: opacity 0.3s, transform 0.3s;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .back-to-top.show {
            opacity: 1;
        }
        .back-to-top:hover {
            background-color: #e55a8a;
            transform: translateY(-5px);
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 80px 0;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }
        .work-modal-img {
            width: 100%;
            height: 300px;
            object-fit: cover;
            border-radius: 10px;
            margin-bottom: 20px;
        }