:root {
            --gtmamk-primary: #ff5900;
            --gtmamk-secondary: #2b2b2b;
            --gtmamk-accent: #f0f4f8;
            --gtmamk-text: #1a1a1a;
            --gtmamk-light-text: #666666;
            --gtmamk-white: #ffffff;
            --gtmamk-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --gtmamk-radius: 16px;
            --gtmamk-container-width: 1400px;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--gtmamk-text);
            line-height: 1.6;
            overflow-x: hidden;
            background-color: #fcfcfc;
        }

        /* 导航栏 */
        .gtmamk-navbar {
            position: fixed;
            top: 24px;
            left: 50%;
            transform: translateX(-50%);
            width: 95%;
            max-width: var(--gtmamk-container-width);
            height: 72px;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, 0.3);
            border-radius: 40px;
            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-links {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            list-style: none;
            min-width: 0;
        }

        .gtmamk-nav-links a {
            text-decoration: none;
            color: var(--gtmamk-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            transition: color 0.3s ease;
            white-space: nowrap;
        }

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

        /* Hero 区块 - 独特对角分层设计 */
        .gtmamk-hero {
            position: relative;
            padding: 180px 0 120px;
            background: linear-gradient(135deg, #fff 0%, #f9f9f9 100%);
            overflow: hidden;
        }

        .gtmamk-hero-bg-text {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            font-size: 30vw;
            font-weight: 900;
            color: rgba(0,0,0,0.02);
            user-select: none;
            z-index: 1;
            white-space: nowrap;
        }

        .gtmamk-container {
            max-width: var(--gtmamk-container-width);
            margin: 0 auto;
            padding: 0 40px;
            position: relative;
            z-index: 2;
        }

        .gtmamk-hero-content {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
        }

        .gtmamk-hero-text {
            flex: 1;
            min-width: 320px;
            word-break: keep-all;
        }

        .gtmamk-hero-tag {
            display: inline-block;
            background: rgba(255, 89, 0, 0.1);
            color: var(--gtmamk-primary);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 24px;
        }

        .gtmamk-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
            line-height: 1.1;
            font-weight: 800;
            margin-bottom: 24px;
            color: var(--gtmamk-secondary);
            word-break: keep-all;
        }

        .gtmamk-hero-subtitle {
            font-size: clamp(1.1rem, 1vw + 0.5rem, 1.4rem);
            color: var(--gtmamk-light-text);
            margin-bottom: 48px;
            max-width: 600px;
            word-break: break-word;
        }

        .gtmamk-hero-btns {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }

        .gtmamk-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 16px 40px;
            border-radius: 30px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
            cursor: pointer;
        }

        .gtmamk-btn-primary {
            background: var(--gtmamk-primary);
            color: var(--gtmamk-white);
            box-shadow: 0 8px 20px rgba(255, 89, 0, 0.2);
        }

        .gtmamk-btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 25px rgba(255, 89, 0, 0.3);
        }

        .gtmamk-btn-outline {
            background: transparent;
            border: 2px solid var(--gtmamk-secondary);
            color: var(--gtmamk-secondary);
        }

        .gtmamk-btn-outline:hover {
            background: var(--gtmamk-secondary);
            color: var(--gtmamk-white);
        }

        /* 专业词库区块 - 网格布局 */
        .gtmamk-lexicon-section {
            padding: 96px 0;
            background: var(--gtmamk-white);
        }

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

        .gtmamk-section-title {
            font-size: clamp(1.8rem, 3vw + 0.5rem, 2.5rem);
            margin-bottom: 16px;
            word-break: keep-all;
        }

        .gtmamk-lexicon-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
        }

        .gtmamk-lexicon-card {
            background: var(--gtmamk-accent);
            padding: 48px;
            border-radius: var(--gtmamk-radius);
            transition: transform 0.4s ease, box-shadow 0.4s ease;
            display: flex;
            flex-direction: column;
            min-width: 0;
            border: 1px solid transparent;
        }

        .gtmamk-lexicon-card:hover {
            transform: translateY(-10px);
            background: var(--gtmamk-white);
            border-color: rgba(255, 89, 0, 0.2);
            box-shadow: var(--gtmamk-shadow);
        }

        .gtmamk-lexicon-industry {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--gtmamk-primary);
        }

        .gtmamk-lexicon-depth {
            font-weight: 600;
            margin-bottom: 24px;
            color: var(--gtmamk-secondary);
        }

        .gtmamk-lexicon-samples {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 24px;
        }

        .gtmamk-tag {
            background: rgba(0,0,0,0.05);
            padding: 4px 12px;
            border-radius: 4px;
            font-size: 0.85rem;
            color: var(--gtmamk-light-text);
        }

        .gtmamk-lexicon-meta {
            margin-top: auto;
            font-size: 0.85rem;
            color: var(--gtmamk-light-text);
            border-top: 1px solid rgba(0,0,0,0.05);
            padding-top: 16px;
        }

        /* 动态内容区块 */
        .gtmamk-dynamic-section {
            padding: 96px 0;
            background: #f4f7f9;
        }

        .gtmamk-article-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
            gap: 24px;
        }

        .gtmamk-article-item {
            background: var(--gtmamk-white);
            padding: 32px;
            border-radius: var(--gtmamk-radius);
            display: flex;
            gap: 24px;
            align-items: center;
            min-width: 0;
            word-break: break-word;
        }

        .gtmamk-article-item:hover {
            box-shadow: var(--gtmamk-shadow);
        }

        .gtmamk-article-date {
            font-family: monospace;
            font-size: 1.2rem;
            color: var(--gtmamk-primary);
            font-weight: bold;
            text-align: center;
            line-height: 1;
            flex-shrink: 0;
        }

        .gtmamk-article-title {
            font-weight: 600;
            font-size: 1.1rem;
            color: var(--gtmamk-secondary);
            text-decoration: none;
        }

        /* 底部 */
        .gtmamk-footer {
            background: var(--gtmamk-secondary);
            color: rgba(255,255,255,0.7);
            padding: 80px 0 40px;
        }

        .gtmamk-footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            margin-bottom: 64px;
        }

        .gtmamk-footer-brand h2 {
            color: var(--gtmamk-white);
            font-size: 1.5rem;
            margin-bottom: 16px;
        }

        .gtmamk-footer-links h4 {
            color: var(--gtmamk-white);
            margin-bottom: 24px;
            font-size: 1rem;
        }

        .gtmamk-footer-links ul {
            list-style: none;
        }

        .gtmamk-footer-links li {
            margin-bottom: 12px;
        }

        .gtmamk-footer-links a {
            color: rgba(255,255,255,0.5);
            text-decoration: none;
            transition: color 0.3s;
        }

        .gtmamk-footer-links a:hover {
            color: var(--gtmamk-primary);
        }

        .gtmamk-footer-bottom {
            text-align: center;
            padding-top: 40px;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.85rem;
        }

        /* 响应式适配 */
        @media (max-width: 768px) {
            .gtmamk-navbar {
                padding: 0 20px;
                top: 10px;
            }
            .gtmamk-nav-links {
                display: none; /* 简化移动端，实际项目中应有汉堡菜单 */
            }
            .gtmamk-hero {
                padding: 140px 0 60px;
                text-align: center;
            }
            .gtmamk-hero-content {
                justify-content: center;
            }
            .gtmamk-hero-btns {
                justify-content: center;
            }
            .gtmamk-lexicon-grid {
                grid-template-columns: 1fr;
            }
            .gtmamk-article-list {
                grid-template-columns: 1fr;
            }
            .gtmamk-container {
                padding: 0 24px;
            }
        }