* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html, body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f8f9fa;
        }

        /* 导航栏样式 */
        .ickfu-navbar-wrapper {
            background: linear-gradient(135deg, #0088cc 0%, #0077b6 100%);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .ickfu-navbar-container {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 20px;
            height: 70px;
        }

        .ickfu-navbar-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            color: white;
            font-weight: bold;
            font-size: 20px;
        }

        .ickfu-navbar-logo img {
            height: 45px;
            width: auto;
        }

        .ickfu-navbar-menu {
            display: flex;
            gap: 30px;
            align-items: center;
        }

        .ickfu-nav-link {
            color: white;
            text-decoration: none;
            font-size: 15px;
            font-weight: 500;
            transition: opacity 0.3s ease;
        }

        .ickfu-nav-link:hover {
            opacity: 0.8;
        }

        /* 主容器 */
        .ickfu-main-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 页头区域 */
        .ickfu-header-section {
            background: linear-gradient(135deg, #0088cc 0%, #0077b6 100%);
            color: white;
            padding: 60px 20px;
            text-align: center;
            margin-bottom: 40px;
        }

        .ickfu-header-title {
            font-size: 48px;
            font-weight: 700;
            margin-bottom: 20px;
            line-height: 1.3;
        }

        .ickfu-header-subtitle {
            font-size: 18px;
            opacity: 0.95;
            margin-bottom: 30px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }

        .ickfu-header-cta {
            display: inline-block;
            background-color: #ffc107;
            color: #333;
            padding: 14px 40px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            font-size: 16px;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
        }

        .ickfu-header-cta:hover {
            background-color: #ffb300;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
        }

        /* 内容区域 */
        .ickfu-content-wrapper {
            background: white;
            border-radius: 8px;
            padding: 50px;
            margin-bottom: 40px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
        }

        .ickfu-content-h1 {
            font-size: 42px;
            color: #0077b6;
            margin-bottom: 20px;
            font-weight: 700;
        }

        .ickfu-intro-text {
            font-size: 16px;
            color: #555;
            margin-bottom: 40px;
            line-height: 1.8;
        }

        /* 教程部分 */
        .ickfu-tutorial-section {
            margin-bottom: 50px;
        }

        .ickfu-section-title {
            font-size: 32px;
            color: #0077b6;
            margin-bottom: 25px;
            font-weight: 600;
            padding-bottom: 15px;
            border-bottom: 3px solid #0088cc;
        }

        .ickfu-step-container {
            margin-bottom: 35px;
        }

        .ickfu-step-header {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-bottom: 15px;
        }

        .ickfu-step-number {
            width: 45px;
            height: 45px;
            background: linear-gradient(135deg, #0088cc 0%, #0077b6 100%);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 20px;
            flex-shrink: 0;
        }

        .ickfu-step-title {
            font-size: 22px;
            color: #333;
            font-weight: 600;
        }

        .ickfu-step-content {
            margin-left: 60px;
            color: #666;
            line-height: 1.8;
        }

        .ickfu-step-content p {
            margin-bottom: 12px;
        }

        .ickfu-step-list {
            list-style: none;
            margin-top: 12px;
        }

        .ickfu-step-list li {
            padding: 8px 0 8px 25px;
            position: relative;
            color: #666;
        }

        .ickfu-step-list li:before {
            content: "✓";
            position: absolute;
            left: 0;
            color: #0088cc;
            font-weight: bold;
        }

        .ickfu-tip-box {
            background-color: #e3f2fd;
            border-left: 4px solid #0088cc;
            padding: 15px 20px;
            margin-top: 15px;
            border-radius: 4px;
            color: #0077b6;
        }

        .ickfu-tip-box strong {
            color: #0077b6;
        }

        .ickfu-warning-box {
            background-color: #fff3cd;
            border-left: 4px solid #ffc107;
            padding: 15px 20px;
            margin-top: 15px;
            border-radius: 4px;
            color: #856404;
        }

        /* 特性列表 */
        .ickfu-features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
            margin-bottom: 40px;
        }

        .ickfu-feature-card {
            background: linear-gradient(135deg, #f5f7fa 0%, #ffffff 100%);
            padding: 30px;
            border-radius: 8px;
            border-left: 4px solid #0088cc;
            transition: all 0.3s ease;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
        }

        .ickfu-feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
        }

        .ickfu-feature-icon {
            font-size: 32px;
            margin-bottom: 15px;
        }

        .ickfu-feature-title {
            font-size: 18px;
            color: #0077b6;
            font-weight: 600;
            margin-bottom: 12px;
        }

        .ickfu-feature-desc {
            color: #666;
            font-size: 14px;
            line-height: 1.6;
        }

        /* CTA区域 */
        .ickfu-cta-section {
            background: linear-gradient(135deg, #0088cc 0%, #0077b6 100%);
            color: white;
            padding: 60px 40px;
            border-radius: 8px;
            text-align: center;
            margin-bottom: 40px;
            box-shadow: 0 4px 20px rgba(0, 136, 204, 0.3);
        }

        .ickfu-cta-title {
            font-size: 36px;
            font-weight: 700;
            margin-bottom: 20px;
        }

        .ickfu-cta-text {
            font-size: 18px;
            margin-bottom: 30px;
            opacity: 0.95;
        }

        .ickfu-cta-button {
            display: inline-block;
            background-color: #ffc107;
            color: #333;
            padding: 16px 50px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 700;
            font-size: 18px;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
            margin: 0 10px;
        }

        .ickfu-cta-button:hover {
            background-color: #ffb300;
            transform: translateY(-3px);
            box-shadow: 0 6px 25px rgba(0, 0, 0, 0.3);
        }

        .ickfu-cta-button-secondary {
            background-color: transparent;
            color: white;
            border: 2px solid white;
        }

        .ickfu-cta-button-secondary:hover {
            background-color: rgba(255, 255, 255, 0.1);
        }

        /* 常见问题 */
        .ickfu-faq-section {
            background: white;
            border-radius: 8px;
            padding: 40px;
            margin-bottom: 40px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
        }

        .ickfu-faq-title {
            font-size: 32px;
            color: #0077b6;
            margin-bottom: 30px;
            font-weight: 600;
        }

        .ickfu-faq-item {
            margin-bottom: 20px;
            border-bottom: 1px solid #eee;
            padding-bottom: 20px;
        }

        .ickfu-faq-item:last-child {
            border-bottom: none;
        }

        .ickfu-faq-question {
            font-size: 18px;
            font-weight: 600;
            color: #333;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .ickfu-faq-icon {
            color: #0088cc;
            font-weight: bold;
        }

        .ickfu-faq-answer {
            color: #666;
            margin-top: 12px;
            line-height: 1.8;
            display: none;
        }

        .ickfu-faq-answer.active {
            display: block;
        }

        /* 页脚 */
        .ickfu-footer-wrapper {
            background-color: #1a1a1a;
            color: #ccc;
            padding: 50px 20px 20px;
            margin-top: 60px;
        }

        .ickfu-footer-container {
            max-width: 1200px;
            margin: 0 auto;
        }

        .ickfu-footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }

        .ickfu-footer-column h4 {
            color: white;
            margin-bottom: 15px;
            font-size: 16px;
        }

        .ickfu-footer-column ul {
            list-style: none;
        }

        .ickfu-footer-column ul li {
            margin-bottom: 10px;
        }

        .ickfu-footer-column a {
            color: #aaa;
            text-decoration: none;
            transition: color 0.3s ease;
        }

        .ickfu-footer-column a:hover {
            color: white;
        }

        .ickfu-footer-bottom {
            border-top: 1px solid #333;
            padding-top: 20px;
            text-align: center;
            color: #888;
        }

        /* 响应式设计 */
        @media (max-width: 768px) {
            .ickfu-navbar-container {
                padding: 0 15px;
                height: 60px;
            }

            .ickfu-navbar-menu {
                gap: 15px;
            }

            .ickfu-nav-link {
                font-size: 13px;
            }

            .ickfu-header-section {
                padding: 40px 20px;
            }

            .ickfu-header-title {
                font-size: 32px;
            }

            .ickfu-header-subtitle {
                font-size: 16px;
            }

            .ickfu-content-wrapper {
                padding: 30px 20px;
            }

            .ickfu-content-h1 {
                font-size: 28px;
            }

            .ickfu-section-title {
                font-size: 24px;
            }

            .ickfu-step-title {
                font-size: 18px;
            }

            .ickfu-cta-section {
                padding: 40px 20px;
            }

            .ickfu-cta-title {
                font-size: 28px;
            }

            .ickfu-cta-text {
                font-size: 16px;
            }

            .ickfu-cta-button {
                padding: 12px 35px;
                font-size: 16px;
                display: block;
                margin: 10px auto;
            }

            .ickfu-features-grid {
                grid-template-columns: 1fr;
            }

            .ickfu-faq-section {
                padding: 20px;
            }
        }

        @media (max-width: 480px) {
            .ickfu-navbar-menu {
                gap: 10px;
                flex-wrap: wrap;
            }

            .ickfu-navbar-logo {
                font-size: 16px;
            }

            .ickfu-header-title {
                font-size: 24px;
            }

            .ickfu-content-h1 {
                font-size: 22px;
            }

            .ickfu-section-title {
                font-size: 20px;
            }

            .ickfu-step-container {
                margin-bottom: 25px;
            }

            .ickfu-step-content {
                margin-left: 50px;
            }
        }