:root {
            --eu06b-primary: #0086d6;
            --eu06b-secondary: #6366f1;
            --eu06b-dark: #0f172a;
            --eu06b-gray: #64748b;
            --eu06b-light: #f8fafc;
            --eu06b-white: #ffffff;
            --eu06b-accent: #f59e0b;
            --eu06b-gap: 8px;
            --eu06b-container-width: 1300px;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--eu06b-light);
            color: var(--eu06b-dark);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* 文本换行规范 */
        p, h1, h2, h3, h4, span, div {
            word-break: keep-all;
            overflow-wrap: break-word;
            word-wrap: break-word;
        }

        /* 导航栏 */
        .eu06b-navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 72px;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(12px);
            z-index: 1000;
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: center;
        }

        .eu06b-nav-container {
            width: var(--eu06b-container-width);
            max-width: 95vw;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            min-width: 0;
        }

        .eu06b-logo {
            display: flex;
            align-items: center;
            min-width: 0;
        }

        .eu06b-logo img {
            height: 40px;
            width: auto;
        }

        .eu06b-nav-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: calc(var(--eu06b-gap) * 3);
            min-width: 0;
        }

        .eu06b-nav-item a {
            text-decoration: none;
            color: var(--eu06b-gray);
            font-weight: 500;
            font-size: 0.95rem;
            transition: color 0.3s ease;
            white-space: nowrap;
        }

        .eu06b-nav-item a:hover {
            color: var(--eu06b-primary);
        }

        .eu06b-nav-item.active a {
            color: var(--eu06b-primary);
            border-bottom: 2px solid var(--eu06b-primary);
            padding-bottom: 4px;
        }

        /* Hero 区 - 独特卡片式布局 */
        .eu06b-hero {
            padding-top: 140px;
            padding-bottom: 80px;
            background: radial-gradient(circle at top right, #e0f2fe, transparent),
                        linear-gradient(to bottom, var(--eu06b-white), var(--eu06b-light));
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
        }

        .eu06b-hero-card {
            width: var(--eu06b-container-width);
            max-width: 90vw;
            background: var(--eu06b-white);
            border-radius: 32px;
            padding: calc(var(--eu06b-gap) * 8);
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.05);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            min-width: 0;
            position: relative;
            overflow: hidden;
        }

        .eu06b-hero-content {
            flex: 1;
            min-width: 320px;
            padding-right: calc(var(--eu06b-gap) * 4);
        }

        .eu06b-hero-badge {
            display: inline-block;
            background: rgba(0, 134, 214, 0.1);
            color: var(--eu06b-primary);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 700;
            margin-bottom: calc(var(--eu06b-gap) * 2);
        }

        .eu06b-hero-title {
            font-size: clamp(2rem, 4vw + 0.5rem, 3.5rem);
            font-weight: 800;
            line-height: 1.2;
            color: var(--eu06b-dark);
            margin-bottom: calc(var(--eu06b-gap) * 3);
        }

        .eu06b-hero-subtitle {
            font-size: clamp(1rem, 1.5vw + 0.5rem, 1.25rem);
            color: var(--eu06b-gray);
            margin-bottom: calc(var(--eu06b-gap) * 4);
            max-width: 600px;
        }

        /* BT 协议矩阵 */
        .eu06b-matrix-section {
            padding: calc(var(--eu06b-gap) * 12) 0;
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
        }

        .eu06b-section-title {
            width: 100%;
            text-align: center;
            font-size: 2.5rem;
            margin-bottom: calc(var(--eu06b-gap) * 8);
            color: var(--eu06b-dark);
        }

        .eu06b-matrix-grid {
            width: var(--eu06b-container-width);
            max-width: 90vw;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: calc(var(--eu06b-gap) * 4);
        }

        .eu06b-matrix-card {
            background: var(--eu06b-white);
            border: 1px solid rgba(0, 0, 0, 0.05);
            border-radius: 20px;
            padding: calc(var(--eu06b-gap) * 5);
            transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            display: flex;
            flex-wrap: wrap;
            flex-direction: column;
            min-width: 0;
        }

        .eu06b-matrix-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 30px 60px rgba(0, 134, 214, 0.1);
            border-color: var(--eu06b-primary);
        }

        .eu06b-matrix-tag {
            font-size: 0.75rem;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--eu06b-secondary);
            font-weight: 700;
            margin-bottom: var(--eu06b-gap);
        }

        .eu06b-matrix-cap {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: calc(var(--eu06b-gap) * 2);
            color: var(--eu06b-dark);
        }

        .eu06b-matrix-desc {
            font-size: 1rem;
            color: var(--eu06b-gray);
            line-height: 1.8;
        }

        /* 用户画像区块 - 错位布局 */
        .eu06b-persona-section {
            padding: calc(var(--eu06b-gap) * 12) 0;
            background-color: var(--eu06b-dark);
            color: var(--eu06b-white);
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
        }

        .eu06b-persona-container {
            width: var(--eu06b-container-width);
            max-width: 90vw;
            display: flex;
            flex-wrap: wrap;
            gap: calc(var(--eu06b-gap) * 6);
            min-width: 0;
        }

        .eu06b-persona-card {
            flex: 1;
            min-width: 300px;
            background: rgba(255, 255, 255, 0.05);
            padding: calc(var(--eu06b-gap) * 6);
            border-radius: 24px;
            border-left: 4px solid var(--eu06b-primary);
            transition: background 0.3s ease;
        }

        .eu06b-persona-card:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        .eu06b-persona-name {
            font-size: 1.75rem;
            font-weight: 700;
            margin-bottom: calc(var(--eu06b-gap) * 2);
            color: var(--eu06b-primary);
        }

        .eu06b-persona-case {
            font-size: 1.1rem;
            margin-bottom: calc(var(--eu06b-gap) * 3);
            opacity: 0.9;
        }

        .eu06b-persona-feature {
            background: rgba(255, 255, 255, 0.1);
            padding: 12px 20px;
            border-radius: 12px;
            font-size: 0.9rem;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
        }

        .eu06b-persona-feature strong {
            color: var(--eu06b-accent);
            margin-right: 8px;
        }

        /* 动态内容区块 */
        .eu06b-dynamic-section {
            padding: calc(var(--eu06b-gap) * 12) 0;
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            background: var(--eu06b-white);
        }

        .eu06b-article-grid {
            width: var(--eu06b-container-width);
            max-width: 90vw;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
            gap: calc(var(--eu06b-gap) * 4);
        }

        .eu06b-article-card {
            padding: calc(var(--eu06b-gap) * 4);
            border: 1px solid #edf2f7;
            border-radius: 16px;
            transition: all 0.3s ease;
        }

        .eu06b-article-card:hover {
            border-color: var(--eu06b-primary);
            box-shadow: 0 10px 20px rgba(0,0,0,0.02);
        }

        /* 页脚 */
        .eu06b-footer {
            background: var(--eu06b-white);
            padding: calc(var(--eu06b-gap) * 10) 0;
            border-top: 1px solid #edf2f7;
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
        }

        .eu06b-footer-content {
            width: var(--eu06b-container-width);
            max-width: 90vw;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            min-width: 0;
        }

        .eu06b-footer-brand {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--eu06b-dark);
            min-width: 200px;
        }

        .eu06b-footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: calc(var(--eu06b-gap) * 4);
            list-style: none;
            min-width: 0;
        }

        .eu06b-footer-links a {
            text-decoration: none;
            color: var(--eu06b-gray);
            font-size: 0.9rem;
        }

        .eu06b-copyright {
            width: 100%;
            text-align: center;
            margin-top: calc(var(--eu06b-gap) * 6);
            color: var(--eu06b-gray);
            font-size: 0.85rem;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .eu06b-nav-menu {
                display: none; /* 简化移动端，实际应有汉堡菜单 */
            }
            .eu06b-hero-card {
                padding: calc(var(--eu06b-gap) * 4);
                text-align: center;
            }
            .eu06b-hero-content {
                padding-right: 0;
            }
            .eu06b-matrix-grid, .eu06b-article-grid {
                grid-template-columns: 1fr;
            }
            .eu06b-footer-content {
                flex-direction: column;
                gap: calc(var(--eu06b-gap) * 4);
                text-align: center;
            }
        }