/* 基础样式 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Microsoft YaHei', Arial, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f9f9f9;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        h1, h2, h3 {
            margin-bottom: 1rem;
            color: #2c3e50;
        }

        p {
            margin-bottom: 1rem;
        }

        ul {
            margin-left: 1.5rem;
            margin-bottom: 1rem;
        }

        /* 导航栏样式 */
        .navbar {
            background-color: #e67e22;
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        }

        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 20px;
            max-width: 1200px;
            margin: 0 auto;
        }

        .nav-title {
            color: white;
            font-size: 1.5rem;
        }

        .nav-menu {
            display: flex;
            list-style: none;
        }

        .nav-link {
            color: white;
            text-decoration: none;
            padding: 0.5rem 1rem;
            transition: background-color 0.3s;
        }

        .nav-link:hover {
            background-color: #d35400;
            border-radius: 4px;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
        }

        .bar {
            width: 25px;
            height: 3px;
            background-color: white;
            margin: 3px 0;
            transition: 0.3s;
        }

        /* 章节封面 */
        .cover {
            height: 100vh;
            background: linear-gradient(135deg, #e67e22, #e74c3c);
            display: flex;
            justify-content: center;
            align-items: center;
            text-align: center;
            color: white;
            margin-top: 60px;
        }

        .cover-content h1 {
            font-size: 3rem;
            margin-bottom: 1rem;
            color: white;
        }

        .cover-content p {
            font-size: 1.2rem;
            margin-bottom: 2rem;
        }

        .start-btn {
            padding: 12px 30px;
            background-color: #3498db;
            color: white;
            border: none;
            border-radius: 30px;
            font-size: 1.1rem;
            cursor: pointer;
            transition: background-color 0.3s, transform 0.3s;
        }

        .start-btn:hover {
            background-color: #2980b9;
            transform: scale(1.05);
        }

        /* 章节内容区域 */
        .section {
            padding: 80px 0;
        }

        .section h2 {
            text-align: center;
            font-size: 2.5rem;
            margin-bottom: 3rem;
            position: relative;
        }

        .section h2::after {
            content: '';
            display: block;
            width: 100px;
            height: 4px;
            background-color: #e67e22;
            margin: 10px auto;
            border-radius: 2px;
        }

        /* 卡片布局 */
        .content-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        .card {
            background: white;
            border-radius: 10px;
            padding: 25px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            transition: transform 0.3s, box-shadow 0.3s;
        }

        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.15);
        }

        .card h3 {
            color: #e67e22;
            border-bottom: 2px solid #f0f0f0;
            padding-bottom: 10px;
            margin-bottom: 15px;
        }

        .example {
            background-color: #f8f9fa;
            padding: 15px;
            border-radius: 5px;
            margin-top: 15px;
        }

        .example h4 {
            color: #e74c3c;
            margin-bottom: 10px;
        }

        /* 剪辑思路网格 */
        .idea-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
        }

        .idea-card {
            background: white;
            border-radius: 10px;
            padding: 20px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            text-align: center;
            transition: transform 0.3s;
        }

        .idea-card:hover {
            transform: scale(1.03);
        }

        .idea-icon {
            font-size: 3rem;
            color: #e67e22;
            margin-bottom: 15px;
        }

        /* 剪辑流程步骤 */
        .process-steps {
            display: flex;
            flex-direction: column;
            gap: 20px;
            margin: 30px 0;
        }

        .step {
            background: white;
            border-radius: 10px;
            padding: 20px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            display: flex;
            align-items: center;
            gap: 20px;
        }

        .step-number {
            background-color: #e67e22;
            color: white;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            font-size: 1.2rem;
            flex-shrink: 0;
        }

        .step-content {
            flex-grow: 1;
        }

        /* 快剪功能网格 */
        .quick-edit-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
        }

        .quick-edit-card {
            background: white;
            border-radius: 10px;
            padding: 20px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            text-align: center;
            transition: transform 0.3s;
        }

        .quick-edit-card:hover {
            transform: translateY(-5px);
        }

        .quick-edit-icon {
            font-size: 3rem;
            color: #e67e22;
            margin-bottom: 15px;
        }

        /* 测试题样式 */
        .quiz-container {
            background: white;
            border-radius: 10px;
            padding: 30px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            max-width: 800px;
            margin: 0 auto;
        }

        .quiz-intro {
            text-align: center;
        }

        .quiz-btn {
            padding: 10px 25px;
            background-color: #e67e22;
            color: white;
            border: none;
            border-radius: 5px;
            font-size: 1rem;
            cursor: pointer;
            transition: background-color 0.3s;
        }

        .quiz-btn:hover {
            background-color: #d35400;
        }

        .options {
            margin: 20px 0;
        }

        .option {
            display: block;
            padding: 10px 15px;
            margin: 10px 0;
            background-color: #f8f9fa;
            border: 1px solid #ddd;
            border-radius: 5px;
            cursor: pointer;
            transition: background-color 0.3s;
        }

        .option:hover {
            background-color: #e9ecef;
        }

        .option.selected {
            background-color: #e67e22;
            color: white;
        }

        .result-container {
            margin-top: 20px;
            padding: 15px;
            border-radius: 5px;
        }

        .correct {
            background-color: #d4edda;
            border: 1px solid #c3e6cb;
        }

        .incorrect {
            background-color: #f8d7da;
            border: 1px solid #f5c6cb;
        }

        .quiz-complete {
            text-align: center;
        }

        /* 页脚样式 */
        footer {
            background-color: #2c3e50;
            color: white;
            text-align: center;
            padding: 30px 0;
        }

        /* 响应式设计 */
        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                width: 100%;
                position: absolute;
                top: 100%;
                left: 0;
                background-color: #e67e22;
            }
            
            .nav-menu.active {
                display: flex;
            }
            
            .hamburger {
                display: flex;
            }
            
            .cover-content h1 {
                font-size: 2rem;
            }
            
            .section h2 {
                font-size: 2rem;
            }
            
            .content-grid, .idea-grid, .quick-edit-grid {
                grid-template-columns: 1fr;
            }
            
            .step {
                flex-direction: column;
                text-align: center;
            }
        }