/* 保持原有风格，扩展教程创意板块 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: system-ui, -apple-system, 'Segoe UI', 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background-color: #ffffff;
            color: #1e293b;
            line-height: 1.5;
            scroll-behavior: smooth;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .navbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            flex-wrap: wrap;
            gap: 20px;
            border-bottom: 1px solid #e9eef3;
        }
        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            background: linear-gradient(135deg, #1e2b3c, #2b5f8a);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
            letter-spacing: -0.3px;
        }
        .nav-links {
            display: flex;
            gap: 32px;
            align-items: center;
            flex-wrap: wrap;
        }
        .nav-links a {
            text-decoration: none;
            font-weight: 500;
            color: #334155;
            transition: color 0.2s;
            font-size: 1rem;
        }
        .nav-links a:hover {
            color: #2b5f8a;
        }
        .nav-links .active {
            color: #2b5f8a;
            border-bottom: 2px solid #2b5f8a;
            padding-bottom: 4px;
        }
        .btn-outline {
            display: inline-block;
            background: transparent;
            border: 1.5px solid #1e4a76;
            color: #1e4a76;
            font-weight: 600;
            padding: 10px 24px;
            border-radius: 40px;
            text-decoration: none;
            transition: 0.2s;
        }
        .btn-outline:hover {
            background-color: #eef4ff;
        }
        .btn-primary {
            display: inline-block;
            background-color: #1e4a76;
            color: white;
            font-weight: 600;
            padding: 12px 28px;
            border-radius: 40px;
            text-decoration: none;
            transition: all 0.25s;
            box-shadow: 0 4px 8px rgba(0,0,0,0.05);
        }
        .btn-primary:hover {
            background-color: #0f3a5c;
            transform: translateY(-2px);
        }
        .hero-section {
            text-align: center;
            padding: 56px 0 32px;
        }
        .hero-section h1 {
            font-size: 3rem;
            font-weight: 800;
            background: linear-gradient(135deg, #0f2b3d, #2b6a9f);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
            margin-bottom: 20px;
        }
        .hero-section p {
            font-size: 1.2rem;
            color: #475569;
            max-width: 800px;
            margin: 0 auto;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            text-align: center;
            margin-bottom: 40px;
            color: #0f2b3d;
        }
        /* 创意步骤卡片 */
        .steps-progress {
            display: flex;
            justify-content: center;
            margin: 40px 0 20px;
        }
        .step-indicator {
            display: flex;
            gap: 8px;
            background: #f0f6fe;
            padding: 8px 24px;
            border-radius: 60px;
        }
        .step-dot {
            width: 12px;
            height: 12px;
            border-radius: 12px;
            background: #bdd3e8;
        }
        .step-dot.active {
            background: #1e4a76;
            width: 32px;
        }
        .tutorial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 28px;
            margin: 40px 0;
        }
        .tutorial-card {
            background: #ffffff;
            border-radius: 32px;
            padding: 32px 24px;
            box-shadow: 0 18px 30px -12px rgba(0,0,0,0.06);
            border: 1px solid #eef2f6;
            transition: transform 0.2s;
        }
        .tutorial-card:hover {
            transform: translateY(-4px);
        }
        .tutorial-icon {
            font-size: 2.8rem;
            margin-bottom: 20px;
        }
        .tutorial-card h3 {
            font-size: 1.5rem;
            margin-bottom: 16px;
            color: #1e4a76;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .code-block {
            background: #f5f9ff;
            border-radius: 20px;
            padding: 16px 20px;
            font-family: 'SF Mono', monospace;
            font-size: 0.9rem;
            border: 1px solid #d4e3f5;
            margin: 20px 0;
            word-break: break-all;
        }
        .tip-box {
            background: #eef4ff;
            border-radius: 24px;
            padding: 20px 24px;
            margin: 30px 0;
            border-left: 6px solid #1e4a76;
        }
        .rule-showcase {
            display: flex;
            flex-wrap: wrap;
            gap: 30px;
            background: #f8fafc;
            border-radius: 40px;
            padding: 40px;
            margin: 50px 0;
        }
        .rule-text {
            flex: 1.2;
        }
        .rule-demo {
            flex: 1;
            background: white;
            border-radius: 28px;
            padding: 24px;
            box-shadow: 0 6px 16px rgba(0,0,0,0.02);
        }
        .rule-line {
            display: flex;
            margin: 12px 0;
            align-items: center;
            gap: 8px;
        }
        .tag {
            background: #e2eaf3;
            padding: 4px 12px;
            border-radius: 30px;
            font-size: 0.8rem;
            font-weight: 600;
        }
        .video-placeholder {
            background: #1e2f3c;
            border-radius: 32px;
            padding: 32px 20px;
            color: white;
            text-align: center;
            margin: 30px 0;
        }
        .faq-mini {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .faq-mini-item {
            background: white;
            border-radius: 24px;
            padding: 18px 24px;
            flex: 1;
            border: 1px solid #e9edf2;
        }
        .footer {
            background-color: #f9fbfd;
            border-top: 1px solid #e9edf2;
            padding: 40px 0 24px;
            margin-top: 40px;
            text-align: center;
            font-size: 0.85rem;
            color: #6c7a91;
        }
        @media (max-width: 680px) {
            .hero-section h1 {
                font-size: 2.2rem;
            }
            .navbar {
                flex-direction: column;
                align-items: flex-start;
            }
        }
        .badge-new {
            background: #1e4a76;
            color: white;
            border-radius: 30px;
            padding: 2px 12px;
            font-size: 0.75rem;
            margin-left: 10px;
        }