/* 全局样式 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        :root {
            --primary: #c99e66;
            --primary-dark: #a87b51;
            --light: #f9f5f0;
            --dark: #5a4a42;
            --medium: #8e7d70;
            --accent-1: #e8daca;
            --accent-2: #d4c1a7;
        }
        
        body {
            background-color: var(--light);
            color: var(--dark);
            font-family: 'Montserrat', sans-serif;
            line-height: 1.7;
            overflow-x: hidden;
        }
        
        h1, h2, h3, h4 {
            font-family: 'Playfair Display', serif;
            font-weight: 600;
        }
        
        .container {
            width: 100%;
            max-width: 1800px;
            margin: 0 auto;
            position: relative;
        }
        
        
        
        .btn {
            display: inline-block;
            padding: 12px 30px;
            background-color: var(--primary);
            color: white;
            text-decoration: none;
            border-radius: 30px;
            font-weight: 600;
            transition: all 0.4s ease;
            border: 2px solid var(--primary);
            text-transform: uppercase;
            letter-spacing: 1px;
            font-size: 0.9rem;
            cursor: pointer;
        }
        
        .btn:hover {
            background-color: transparent;
            color: var(--primary);
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        }
        
        /* 头部样式 */
        header {
            position: sticky;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(249, 245, 240, 0.95);
            padding: 20px 0;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
            z-index: 1000;
            transition: all 0.4s ease;
        }
        
        .header-container {
            width: 90%;
            max-width: 1800px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .logo {
            display: flex;
            align-items: center;
        }
        
        .logo h1 {
            font-size: 2.2rem;
            color: var(--dark);
            font-weight: 700;
            letter-spacing: 1px;
        }
        
        .logo i {
            color: var(--primary);
            margin-right: 12px;
            font-size: 2.5rem;
        }
        
        
        
        .nav-links li {
            margin: 0 20px;
        }
        
        .nav-links a {
            text-decoration: none;
            color: var(--dark);
            font-weight: 500;
            font-size: 1.1rem;
            padding: 8px 0;
            position: relative;
            transition: all 0.3s ease;
        }
        
        .nav-links a:hover {
            color: var(--primary);
        }
        
        .nav-links a::after {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            bottom: 0;
            left: 0;
            background-color: var(--primary);
            transition: width 0.3s ease;
        }
        
        .nav-links a:hover::after {
            width: 100%;
        }
        
        .header-icons {
            display: flex;
        }
        
        .header-icons a {
            margin-left: 25px;
            color: var(--dark);
            font-size: 1.4rem;
            transition: color 0.3s ease;
        }
        
        .header-icons a:hover {
            color: var(--primary);
        }
        
        /* 面包屑导航 */
        .breadcrumb {
            width: 90%;
            max-width: 1800px;
            margin: 40px auto 20px;
            padding: 0 20px;
        }
        
        .breadcrumb a {
            color: var(--medium);
            text-decoration: none;
            transition: color 0.3s ease;
        }
        
        .breadcrumb a:hover {
            color: var(--primary);
        }
        
        .breadcrumb span {
            color: var(--primary);
            margin: 0 10px;
        }
        
        /* 教程页面主体 */
        .tutorials-page {
            width: 90%;
            max-width: 1800px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 300px 1fr;
            gap: 40px;
        }
        
        /* 左侧分类筛选 */
        .filters-sidebar {
            background: white;
            border-radius: 20px;
            padding: 30px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            height: fit-content;
            position: sticky;
            top: 120px;
        }
        
        .filter-section {
            margin-bottom: 40px;
            border-bottom: 1px solid var(--accent-1);
            padding-bottom: 30px;
        }
        
        .filter-section:last-child {
            border-bottom: none;
            margin-bottom: 0;
            padding-bottom: 0;
        }
        
        .filter-title {
            font-size: 1.4rem;
            margin-bottom: 20px;
            color: var(--dark);
            display: flex;
            align-items: center;
        }
        
        .filter-title i {
            margin-right: 10px;
            color: var(--primary);
        }
        
        .category-list {
            list-style: none;
        }
        
        .category-item {
            margin-bottom: 15px;
            display: flex;
            align-items: center;
        }
        
        .category-item input {
            margin-right: 12px;
            width: 20px;
            height: 20px;
            accent-color: var(--primary);
        }
        
        .category-item label {
            font-size: 1.1rem;
            color: var(--medium);
            cursor: pointer;
            transition: color 0.3s ease;
            display: flex;
            align-items: center;
            flex-grow: 1;
        }
        
        .category-item label:hover {
            color: var(--primary);
        }
        
        .category-count {
            margin-left: auto;
            background: var(--light);
            padding: 3px 10px;
            border-radius: 30px;
            font-size: 0.9rem;
            color: var(--medium);
        }
        
        .difficulty-levels {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        
        .difficulty-btn {
            padding: 8px 20px;
            border: 2px solid var(--accent-1);
            border-radius: 30px;
            background: white;
            color: var(--medium);
            cursor: pointer;
            transition: all 0.3s ease;
            font-weight: 500;
        }
        
        .difficulty-btn:hover, .difficulty-btn.active {
            background: var(--primary);
            color: white;
            border-color: var(--primary);
        }
        
        .filter-btn {
            width: 100%;
            padding: 15px;
            font-size: 1.1rem;
            background: var(--dark);
            border-color: var(--dark);
        }
        
        .filter-btn:hover {
            color: var(--dark);
        }
        
        /* 右侧内容区 */
        .tutorials-content {
            padding-bottom: 60px;
        }
        
        /* 搜索和排序 */
        .search-sort {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 40px;
            background: white;
            padding: 20px 30px;
            border-radius: 20px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
        }
        
        .search-box {
            position: relative;
            width: 60%;
        }
        
        .search-box input {
            width: 100%;
            padding: 15px 20px 15px 50px;
            border: 2px solid var(--accent-1);
            border-radius: 50px;
            font-size: 1.1rem;
            transition: border-color 0.3s ease;
        }
        
        .search-box input:focus {
            outline: none;
            border-color: var(--primary);
        }
        
        .search-box i {
            position: absolute;
            left: 20px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--medium);
            font-size: 1.2rem;
        }
        
        .sort-select {
            display: flex;
            align-items: center;
        }
        
        .sort-select label {
            margin-right: 15px;
            color: var(--medium);
            font-size: 1.1rem;
        }
        
        .sort-select select {
            padding: 12px 20px;
            border: 2px solid var(--accent-1);
            border-radius: 50px;
            background: white;
            color: var(--medium);
            font-size: 1.1rem;
            cursor: pointer;
            min-width: 180px;
        }
        
        .sort-select select:focus {
            outline: none;
            border-color: var(--primary);
        }
        
        /* 教程系列网格 */
        .series-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
            gap: 30px;
            margin-bottom: 60px;
        }
        
        .series-card {
            background: white;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            transition: all 0.4s ease;
            position: relative;
        }
        
        .series-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
        }
        
        .series-badge {
            position: absolute;
            top: 20px;
            left: 20px;
            background: var(--primary);
            color: white;
            padding: 5px 15px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.9rem;
            z-index: 10;
        }
        
        .series-image {
            height: 220px;
            background-size: cover;
            background-position: center;
            position: relative;
        }
        
        .play-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.4);
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        
        .play-icon {
            width: 70px;
            height: 70px;
            background: rgba(201, 158, 102, 0.8);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 28px;
        }
        
        .series-card:hover .play-overlay {
            opacity: 1;
        }
        
        .series-1 { background: url('https://images.unsplash.com/photo-1586367790038-c346e765e4ba?ixlib=rb-4.0.3&auto=format&fit=crop&w=800&q=80') no-repeat center/cover; }
        .series-2 { background: url('https://images.unsplash.com/photo-1592486058517-36236ba247c8?ixlib=rb-4.0.3&auto=format&fit=crop&w=800&q=80') no-repeat center/cover; }
        .series-3 { background: url('https://images.unsplash.com/photo-1610552050890-fe99536c2615?ixlib=rb-4.0.3&auto=format&fit=crop&w=800&q=80') no-repeat center/cover; }
        .series-4 { background: url('https://images.unsplash.com/photo-1583947581924-860bda6a26df?ixlib=rb-4.0.3&auto=format&fit=crop&w=800&q=80') no-repeat center/cover; }
        .series-5 { background: url('https://images.unsplash.com/photo-1604176354204-92669d8b4a56?ixlib=rb-4.0.3&auto=format&fit=crop&w=800&q=80') no-repeat center/cover; }
        .series-6 { background: url('https://images.unsplash.com/photo-1587668178277-295251f900ce?ixlib=rb-4.0.3&auto=format&fit=crop&w=800&q=80') no-repeat center/cover; }
        .series-7 { background: url('https://images.unsplash.com/photo-1587668227791-8764ea6b1c0e?ixlib=rb-4.0.3&auto=format&fit=crop&w=800&q=80') no-repeat center/cover; }
        .series-8 { background: url('https://images.unsplash.com/photo-1587668278277-295251f900ce?ixlib=rb-4.0.3&auto=format&fit=crop&w=800&q=80') no-repeat center/cover; }
        
        .series-content {
            padding: 25px;
        }
        
        .series-category {
            color: var(--primary);
            font-size: 0.9rem;
            margin-bottom: 10px;
            display: block;
            font-weight: 500;
        }
        
        .series-title {
            font-size: 1.5rem;
            margin-bottom: 15px;
            color: var(--dark);
            line-height: 1.3;
        }
        
        .series-meta {
            display: flex;
            justify-content: space-between;
            margin-bottom: 15px;
            color: var(--medium);
            font-size: 1rem;
        }
        
        .episodes-count, .duration {
            display: flex;
            align-items: center;
        }
        
        .episodes-count i, .duration i {
            margin-right: 8px;
            color: var(--primary);
        }
        
        .series-difficulty {
            display: flex;
            align-items: center;
            margin-bottom: 20px;
        }
        
        .series-difficulty span {
            margin-right: 10px;
            color: var(--medium);
        }
        
        .series-stars {
            color: var(--primary);
        }
        
        .progress-container {
            margin-bottom: 20px;
        }
        
        .progress-label {
            display: flex;
            justify-content: space-between;
            margin-bottom: 8px;
            font-size: 0.9rem;
            color: var(--medium);
        }
        
        .progress-bar {
            height: 8px;
            background: var(--accent-1);
            border-radius: 4px;
            overflow: hidden;
        }
        
        .progress {
            height: 100%;
            background: var(--primary);
            border-radius: 4px;
            width: 65%; /* 示例进度 */
        }
        
        .resources {
            display: flex;
            gap: 10px;
            margin-top: 20px;
        }
        
        .resource-btn {
            flex: 1;
            padding: 10px;
            border: 2px solid var(--accent-1);
            border-radius: 8px;
            background: white;
            color: var(--medium);
            cursor: pointer;
            transition: all 0.3s ease;
            font-weight: 500;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .resource-btn:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        
        .resource-btn i {
            margin-right: 8px;
        }
        
        /* 分页器 */
        .pagination {
            display: flex;
            justify-content: center;
            align-items: center;
            margin-top: 40px;
        }
        
        .pagination-btn {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 5px;
            background: white;
            color: var(--dark);
            font-weight: 600;
            text-decoration: none;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            transition: all 0.3s ease;
        }
        
        .pagination-btn:hover, .pagination-btn.active {
            background: var(--primary);
            color: white;
            transform: translateY(-3px);
        }
        
        .pagination-btn i {
            font-size: 1.2rem;
        }
        
        /* 特色教程区 */
        .featured-tutorials {
            background: linear-gradient(to bottom, #f0ebe3, #f9f5f0);
         
            margin-bottom: 60px;
            border-radius: 20px;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 20px;
            position: relative;
        }
        
        .section-title h2 {
            font-size: 2.8rem;
            color: var(--dark);
            display: inline-block;
            padding-bottom: 15px;
            position: relative;
        }
        
        .section-title h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 100px;
            height: 4px;
            background-color: var(--primary);
            border-radius: 2px;
        }
        
        .featured-slider {
            max-width: 1200px;
            margin: 0 auto;
            position: relative;
            overflow: hidden;
            height: 400px;
        }
        
        .featured-slide {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            display: flex;
            align-items: center;
            padding: 0 50px;
            opacity: 0;
            transition: opacity 1s ease;
        }
        
        .featured-slide.active {
            opacity: 1;
        }
        
        .slide-1 {
            background: linear-gradient(90deg, rgba(0,0,0,0.6) 0%, rgba(0,0,0,0.3) 100%), url('https://images.unsplash.com/photo-1587668178277-295251f900ce?ixlib=rb-4.0.3') no-repeat center/cover;
        }
        
        .slide-2 {
            background: linear-gradient(90deg, rgba(0,0,0,0.6) 0%, rgba(0,0,0,0.3) 100%), url('https://images.unsplash.com/photo-1583947581924-860bda6a26df?ixlib=rb-4.0.3') no-repeat center/cover;
        }
        
        .slide-3 {
            background: linear-gradient(90deg, rgba(0,0,0,0.6) 0%, rgba(0,0,0,0.3) 100%), url('https://images.unsplash.com/photo-1604176354204-92669d8b4a56?ixlib=rb-4.0.3') no-repeat center/cover;
        }
        
        .slide-content {
            max-width: 600px;
            color: #fff;
        }
        
        .slide-content h3 {
            font-size: 2.5rem;
            margin-bottom: 20px;
            line-height: 1.2;
        }
        
        .slide-content p {
            font-size: 1.2rem;
            margin-bottom: 30px;
        }
        
        .slide-nav {
            position: absolute;
            bottom: 30px;
            left: 50%;
            transform: translateX(-50%);
            display: flex;
        }
        
        .slide-dot {
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background-color: rgba(255, 255, 255, 0.5);
            margin: 0 8px;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        
        .slide-dot.active {
            background-color: #fff;
            transform: scale(1.3);
        }
        
        /* 页脚 */
        footer {
            background-color: var(--dark);
            color: var(--accent-1);
            padding: 100px 0 30px;
            position: relative;
        }
        
        .footer-container {
            width: 90%;
            max-width: 1800px;
            margin: 0 auto;
        }
        
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 50px;
            margin-bottom: 60px;
        }
        
        .footer-col h3 {
            font-size: 1.5rem;
            margin-bottom: 25px;
            position: relative;
            padding-bottom: 15px;
            color: white;
        }
        
        .footer-col h3::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 3px;
            background-color: var(--primary);
            border-radius: 2px;
        }
        
        .footer-col p {
            margin-bottom: 20px;
            line-height: 1.8;
            color: var(--accent-2);
        }
        
        .footer-links {
            list-style: none;
        }
        
        .footer-links li {
            margin-bottom: 15px;
        }
        
        .footer-links a {
            color: var(--accent-2);
            text-decoration: none;
            transition: color 0.3s ease;
            font-size: 1.05rem;
        }
        
        .footer-links a:hover {
            color: var(--primary);
        }
        
        .social-links {
            display: flex;
            margin-top: 25px;
        }
        
        .social-links a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 45px;
            height: 45px;
            background-color: rgba(212, 193, 167, 0.2);
            border-radius: 50%;
            margin-right: 15px;
            color: var(--accent-1);
            transition: all 0.3s ease;
            font-size: 1.2rem;
        }
        
        .social-links a:hover {
            background-color: var(--primary);
            transform: translateY(-5px);
        }
        
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(212, 193, 167, 0.3);
            font-size: 1rem;
            color: var(--accent-2);
            max-width: 1600px;
            margin: 0 auto;
        }
        
        /* 响应式调整 */
        @media (max-width: 1200px) {
            .tutorials-page {
                grid-template-columns: 250px 1fr;
                gap: 30px;
            }
            
            .series-grid {
                grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            }
        }
        
        @media (max-width: 992px) {
            .tutorials-page {
                grid-template-columns: 1fr;
            }
            
            .filters-sidebar {
                position: relative;
                top: 0;
            }
            
            .search-sort {
                flex-direction: column;
                align-items: flex-start;
            }
            
            .search-box {
                width: 100%;
                margin-bottom: 20px;
            }
        }
        
        @media (max-width: 768px) {
            .series-grid {
                grid-template-columns: 1fr;
            }
            
            .sort-select {
                flex-direction: column;
                align-items: flex-start;
                width: 100%;
            }
            
            .sort-select label {
                margin-bottom: 10px;
            }
            
            .sort-select select {
                width: 100%;
            }
            
            .featured-slide {
                padding: 0 20px;
            }
            
            .slide-content h3 {
                font-size: 2rem;
            }
        }