body {
    font-family: 'Noto Sans SC', sans-serif;
    font-weight: 400; /* 默认使用 Regular */
}
.custom-breadcrumb {
    background-color: #f8f9fa;
    padding: 10px 15px;
    border-radius: 5px;
    margin-bottom: 20px;
}
img{

}
.custom-breadcrumb .breadcrumb-item a {
    color: #343a40;
    text-decoration: none;
}

.custom-breadcrumb .breadcrumb-item a:hover {
    color: #ffd700;
}

.custom-breadcrumb .breadcrumb-item.active {
    color: #6c757d;
}
h1, h2, h3 {
    font-weight: 700; /* 默认使用 Bold */
}

.thin-text {
    font-weight: 100;
}

.extra-light-text {
    font-weight: 200;
}

.light-text {
    font-weight: 300;
}

.medium-text {
    font-weight: 500;
}

.semi-bold-text {
    font-weight: 600;
}

.extra-bold-text {
    font-weight: 800;
}

.black-text {
    font-weight: 900;
}
body {
            background-color: #f0f8ff !important;
            font-family: 'Noto Sans SC', sans-serif;
        }
        .hero-section {
            background-size: cover;
            background-position: center;
            color: white;
            padding: 100px 0;
            text-align: center;
        }

        .video-card {
            transition: transform 0.3s, box-shadow 0.3s;
        }

        .video-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
        }

        .navbar {
            background: linear-gradient(90deg, #343a40, #495057);
            padding: 15px 0;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
        }

        .navbar-brand {
            font-size: 1.8rem; /* 设置文字Logo字体大小 */
            font-weight: 700; /* 加粗文字 */
            color: #ffffff !important; /* 白色文字，与暗色导航栏对比 */
            transition: color 0.3s; /* 保留悬停效果 */
        }

        .navbar-brand:hover {
            color: #ffd700 !important; /* 悬停时变为金色，与.nav-link一致 */
        }

        .sub-nav {
            background-color: #ffffff;
            padding: 15px 0;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
            text-align: center;
        }

        .nav-link {
            color: #343a40 !important;
            font-weight: 500;
            margin: 0 15px;
            transition: color 0.3s;
        }

        .nav-link:hover {
            color: #ffd700 !important;
        }

        .search-form {
            max-width: 350px;
            margin: 0 auto;
        }

        .search-input {
            border-radius: 20px 0 0 20px;
            border: 1px solid #ced4da;
            padding: 10px 15px;
        }

        .search-button {
            border-radius: 0 20px 20px 0;
            background-color: #ffd700;
            border: 1px solid #ffd700;
            padding: 10px 20px;
            transition: background-color 0.3s, border-color 0.3s;
        }

        .search-button:hover {
            background-color: #e6c200;
            border-color: #e6c200;
        }

        .categories {
            background-color: #f8f9fa;
            padding: 20px 0;
        }

        .category-item {
            text-align: center;
            font-size: 1rem;
            color: #343a40;
            background-color: #ffffff;
            border: 1px solid #dee2e6;
            border-radius: 10px;
            padding: 10px;
            transition: background-color 0.3s, color 0.3s;
            text-decoration: none;
            display: block;
        }

        .category-item:hover {
            background-color: #d4a017;
            color: #ffffff;
        }

        .more-videos-btn {
            background-color: #343a40;
            border: 1px solid #343a40;
            border-radius: 20px;
            color: #ffffff;
            font-size: 1rem;
            padding: 10px 20px;
            transition: background-color 0.3s, border-color 0.3s;
            text-decoration: none;
        }

        .more-videos-btn:hover {
            background-color: #495057;
            border-color: #495057;
        }

        .banner-ad {
            background-color: #e9ecef;
            border: 1px solid #dee2e6;
            border-radius: 10px;
            margin: 20px 0;
            padding: 20px;
            text-align: center;
        }

        .friend-links {
            background-color: #f8f9fa;
            padding: 20px 0;
        }

        .friend-link-item {
            text-align: center;
            font-size: 1rem;
            color: #343a40;
            background-color: #ffffff;
            border: 1px solid #dee2e6;
            border-radius: 10px;
            padding: 10px;
            transition: color 0.3s;
            text-decoration: none;
            display: block;
        }

        .friend-link-item:hover {
            color: #6c757d;
        }

        .hot-search {
            background-color: #e7f0fa;
            padding: 20px 0;
        }


        .hot-search-items {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: flex-start;
        }

        @media (max-width: 768px) {
            .hot-search-items {
                justify-content: flex-start;
                margin: 0 -10px;
            }
        }

        .hot-search-item {
            text-align: center;
            font-size: 1rem;
            color: #343a40;
            background-color: #f0f8ff;
            border: 1px solid #b0c4de;
            border-radius: 12px;
            padding: 8px 12px;
            transition: color 0.3s;
            text-decoration: none;
            display: inline-block;
            white-space: nowrap;
        }

        .hot-search-item:hover {
            color: #ff6347;
        }

        footer {
            background-color: #343a40;
            color: white;
            padding: 20px 0;
        }

        h2 {
            color: #343a40;
            font-weight: 700;
            font-size: 2rem;
            text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.1);
            margin-bottom: 1.5rem;
        }

        /* 移动端优化 */
        @media (max-width: 768px) {
            .navbar-brand {
                font-size: 1.4rem; /* 移动端稍小字体 */
            }

            .sub-nav .navbar-nav {
                flex-direction: column;
                align-items: center;
                gap: 10px;
            }

            .nav-link {
                margin: 5px 0;
                font-size: 1rem;
            }

            .search-form {
                max-width: 300px;
                margin: 0 auto;
            }

            .category-item {
                font-size: 0.8rem;
                padding: 6px;
            }

            .friend-link-item {
                font-size: 0.8rem;
                padding: 6px;
            }

            .hot-search-item {
                font-size: 0.8rem;
                padding: 8px 10px;
            }

            h2 {
                font-size: 1.5rem;
                flex-grow: 0;
            }

            .more-videos-btn {
                font-size: 0.9rem;
                padding: 8px 15px;
            }

            .card-img-top {
                height: 200px;
                object-fit: cover;
            }

            .card-body {
                padding: 0.75rem;
            }

            .video-card-item .card-title,
            .video-card-item .card-text {
                font-size: 0.8rem;
            }
        }