:root {
            --gtmamk-primary: #FF6600;
            --gtmamk-primary-light: #FF8533;
            --gtmamk-dark: #1D1D1F;
            --gtmamk-grey: #86868B;
            --gtmamk-bg-light: #F5F5F7;
            --gtmamk-white: #FFFFFF;
            --gtmamk-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --gtmamk-radius: 16px;
        }

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--gtmamk-dark);
            background-color: var(--gtmamk-white);
            line-height: 1.6;
            overflow-x: hidden;
            word-break: keep-all;
        }

        /* 导航栏设计 - 浮动毛玻璃 */
        .gtmamk-header {
            position: fixed;
            top: 24px;
            left: 50%;
            transform: translateX(-50%);
            width: 90vw;
            max-width: 1100px;
            height: 64px;
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, 0.3);
            border-radius: 50px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 32px;
            z-index: 1000;
            box-shadow: var(--gtmamk-shadow);
        }

        .gtmamk-logo {
            flex-shrink: 0;
            display: flex;
            align-items: center;
        }

        .gtmamk-logo img {
            height: 32px;
            width: auto;
        }

        .gtmamk-nav {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            list-style: none;
            min-width: 0;
        }

        .gtmamk-nav li a {
            text-decoration: none;
            color: var(--gtmamk-dark);
            font-size: 14px;
            font-weight: 500;
            transition: color 0.3s;
        }

        .gtmamk-nav li a:hover {
            color: var(--gtmamk-primary);
        }

        /* Hero 区域 - 对角线分割设计 */
        .gtmamk-hero {
            position: relative;
            padding-top: 160px;
            padding-bottom: 96px;
            background: linear-gradient(135deg, #FFF5EE 0%, #FFFFFF 100%);
            overflow: hidden;
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            text-align: center;
        }

        .gtmamk-hero-content {
            max-width: 900px;
            padding: 0 24px;
            position: relative;
            z-index: 2;
            min-width: 0;
            word-break: break-word;
        }

        .gtmamk-hero-badge {
            display: inline-block;
            background: rgba(255, 102, 0, 0.1);
            color: var(--gtmamk-primary);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 24px;
        }

        .gtmamk-hero h1 {
            font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
            line-height: 1.1;
            font-weight: 700;
            margin-bottom: 24px;
            color: var(--gtmamk-dark);
        }

        .gtmamk-hero p {
            font-size: clamp(1rem, 1.5vw + 0.5rem, 1.25rem);
            color: var(--gtmamk-grey);
            max-width: 700px;
            margin: 0 auto 40px;
        }

        /* 动态声波装饰 */
        .gtmamk-wave-container {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 60px;
            margin-top: 32px;
        }

        .gtmamk-wave-bar {
            width: 4px;
            background: var(--gtmamk-primary);
            border-radius: 2px;
            animation: gtmamk-wave 1.5s ease-in-out infinite;
        }

        @keyframes gtmamk-wave {
            0%, 100% { height: 10px; }
            50% { height: 50px; }
        }

        /* 核心教程区块 - 极简卡片流 */
        .gtmamk-main-section {
            padding: 96px 0;
            max-width: 1100px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
            padding-left: 24px;
            padding-right: 24px;
        }

        .gtmamk-step-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
            width: 100%;
        }

        .gtmamk-step-card {
            background: var(--gtmamk-bg-light);
            padding: 40px;
            border-radius: var(--gtmamk-radius);
            transition: transform 0.3s cubic-bezier(0.2, 0, 0.2, 1), box-shadow 0.3s;
            position: relative;
            overflow: hidden;
            min-width: 0;
            word-break: break-word;
        }

        .gtmamk-step-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--gtmamk-shadow);
            background: var(--gtmamk-white);
        }

        .gtmamk-step-number {
            font-size: 64px;
            font-weight: 800;
            color: rgba(255, 102, 0, 0.1);
            position: absolute;
            top: 20px;
            right: 20px;
            line-height: 1;
        }

        .gtmamk-step-card h3 {
            font-size: 24px;
            margin-bottom: 16px;
            position: relative;
            z-index: 1;
        }

        .gtmamk-step-card p {
            color: var(--gtmamk-grey);
            font-size: 16px;
            line-height: 1.8;
            position: relative;
            z-index: 1;
        }

        /* 专业词库区块 - 玻璃质感列表 */
        .gtmamk-lexicon-section {
            background: var(--gtmamk-dark);
            color: var(--gtmamk-white);
            padding: 96px 24px;
            border-radius: 40px;
            margin: 48px 24px;
        }

        .gtmamk-section-header {
            text-align: center;
            margin-bottom: 64px;
        }

        .gtmamk-section-header h2 {
            font-size: clamp(2rem, 3vw, 3rem);
            margin-bottom: 16px;
        }

        .gtmamk-lexicon-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 24px;
            max-width: 1200px;
            margin: 0 auto;
        }

        .gtmamk-lexicon-item {
            border: 1px solid rgba(255, 255, 255, 0.1);
            padding: 32px;
            border-radius: 24px;
            background: rgba(255, 255, 255, 0.03);
            transition: 0.3s;
            min-width: 0;
            word-break: break-word;
        }

        .gtmamk-lexicon-item:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: var(--gtmamk-primary);
        }

        .gtmamk-lexicon-tag {
            color: var(--gtmamk-primary);
            font-size: 14px;
            font-weight: 600;
            text-transform: uppercase;
            margin-bottom: 12px;
            display: block;
        }

        .gtmamk-sample-terms {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 16px;
        }

        .gtmamk-term {
            background: rgba(255, 255, 255, 0.1);
            padding: 4px 12px;
            border-radius: 6px;
            font-size: 13px;
        }

        /* FAQ/动态 区块 */
        .gtmamk-dynamic-section {
            padding: 96px 24px;
            max-width: 900px;
            margin: 0 auto;
        }

        .gtmamk-faq-item {
            margin-bottom: 24px;
            padding-bottom: 24px;
            border-bottom: 1px solid #EDEDED;
            min-width: 0;
            word-break: break-word;
        }

        .gtmamk-faq-item h4 {
            font-size: 18px;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .gtmamk-faq-item h4::before {
            content: 'Q';
            background: var(--gtmamk-primary);
            color: white;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            flex-shrink: 0;
        }

        /* 页脚 */
        .gtmamk-footer {
            background: var(--gtmamk-bg-light);
            padding: 64px 24px;
            text-align: center;
            border-top: 1px solid #E5E5E7;
        }

        .gtmamk-footer-brand {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--gtmamk-dark);
        }

        .gtmamk-footer-links {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 24px;
            margin-bottom: 32px;
            list-style: none;
        }

        .gtmamk-footer-links a {
            color: var(--gtmamk-grey);
            text-decoration: none;
            font-size: 14px;
        }

        .gtmamk-copyright {
            color: var(--gtmamk-grey);
            font-size: 12px;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .gtmamk-header {
                width: 95vw;
                padding: 0 16px;
                top: 12px;
            }
            .gtmamk-nav {
                display: none; /* 移动端可隐藏或改为汉堡菜单，此处为简洁处理 */
            }
            .gtmamk-hero h1 {
                font-size: 2.5rem;
            }
            .gtmamk-lexicon-section {
                margin: 24px 12px;
                border-radius: 20px;
            }
        }