* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Inter', sans-serif;
            background-color: #050608;
            color: #EFF0F2;
            line-height: 1.5;
            scroll-behavior: smooth;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }
        /* 深色科技风格 */
        :root {
            --bg-primary: #050608;
            --bg-card: #111315;
            --bg-elevated: #1A1D21;
            --border-dim: #2A2E34;
            --accent: #FF6B00;
            --accent-hover: #FF8534;
            --text-secondary: #A0A5AB;
            --text-white: #FFFFFF;
        }
        /* 导航栏 */
        .navbar {
            padding: 20px 0;
            border-bottom: 1px solid var(--border-dim);
            background: rgba(5, 6, 8, 0.96);
            backdrop-filter: blur(8px);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        .nav-flex {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }
        .logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #FFFFFF 0%, #FF6B00 100%);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        .nav-links {
            display: flex;
            gap: 28px;
            font-weight: 500;
        }
        .nav-links a {
            color: var(--text-secondary);
            text-decoration: none;
            transition: 0.2s;
            font-size: 1rem;
        }
        .nav-links a:hover {
            color: var(--accent);
        }
        /* 按钮 */
        .btn-primary {
            background: var(--accent);
            color: #0A0B0D;
            padding: 12px 28px;
            border-radius: 40px;
            font-weight: 600;
            text-decoration: none;
            display: inline-block;
            transition: 0.25s;
            border: none;
            cursor: pointer;
            font-size: 0.95rem;
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(255, 107, 0, 0.25);
        }
        .btn-outline {
            border: 1px solid var(--accent);
            color: var(--accent);
            background: transparent;
            padding: 8px 20px;
            border-radius: 40px;
            font-weight: 500;
            text-decoration: none;
            transition: 0.2s;
            display: inline-block;
        }
        .btn-outline:hover {
            background: rgba(255, 107, 0, 0.1);
            transform: scale(0.98);
        }
        /* Hero Section */
        .hero {
            padding: 70px 0 60px;
            text-align: center;
        }
        .hero h1 {
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1.2;
            background: linear-gradient(145deg, #FFF 0%, #FFB27A 100%);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            margin-bottom: 20px;
        }
        .hero p {
            font-size: 1.2rem;
            color: var(--text-secondary);
            max-width: 700px;
            margin: 0 auto 32px;
        }
        /* 功能卡片网格 */
        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            margin: 56px 0 32px 0;
            text-align: center;
            letter-spacing: -0.3px;
        }
        .section-sub {
            text-align: center;
            color: var(--text-secondary);
            margin-bottom: 48px;
            font-size: 1.1rem;
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 32px;
            margin: 40px 0 20px;
        }
        .feature-card {
            background: var(--bg-card);
            padding: 32px 24px;
            border-radius: 28px;
            border: 1px solid var(--border-dim);
            transition: all 0.3s ease;
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            border-color: var(--accent);
            box-shadow: 0 20px 30px -12px rgba(0,0,0,0.5);
        }
        .feature-icon {
            font-size: 2.8rem;
            color: var(--accent);
            margin-bottom: 20px;
        }
        .feature-card h3 {
            font-size: 1.5rem;
            margin-bottom: 12px;
        }
        .feature-card p {
            color: var(--text-secondary);
        }
        /* 产品卡片区域 */
        .products-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 40px;
            margin: 30px 0 50px;
        }
        .product-card {
            background: var(--bg-elevated);
            border-radius: 32px;
            overflow: hidden;
            border: 1px solid var(--border-dim);
            transition: 0.25s;
        }
        .product-card:hover {
            border-color: var(--accent);
            transform: scale(1.01);
        }
        .product-img {
            background: #0D0F12;
            text-align: center;
            padding: 32px 20px;
            border-bottom: 1px solid var(--border-dim);
        }
        .product-img img {
            max-width: 100%;
            height: auto;
            border-radius: 12px;
            transition: 0.2s;
        }
        .product-info {
            padding: 24px;
        }
        .product-info h3 {
            font-size: 1.8rem;
            margin-bottom: 12px;
            font-weight: 700;
        }
        .product-price {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--accent);
            margin: 12px 0;
        }
        .spec-list {
            list-style: none;
            margin: 20px 0;
        }
        .spec-list li {
            padding: 8px 0;
            border-bottom: 1px dashed var(--border-dim);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .spec-list i {
            width: 24px;
            color: var(--accent);
        }
        .btn-card {
            width: 100%;
            text-align: center;
            margin-top: 10px;
        }
        /* 详细参数表格 */
        .spec-table-wrapper {
            overflow-x: auto;
            margin: 40px 0 70px;
            background: var(--bg-card);
            border-radius: 28px;
            padding: 4px;
            border: 1px solid var(--border-dim);
        }
        .spec-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
        }
        .spec-table th, .spec-table td {
            padding: 18px 16px;
            text-align: left;
            border-bottom: 1px solid var(--border-dim);
        }
        .spec-table th {
            background-color: #0F1115;
            font-weight: 600;
            color: var(--accent);
            font-size: 1rem;
        }
        .spec-table tr:last-child td {
            border-bottom: none;
        }
        .spec-table td:first-child, .spec-table th:first-child {
            font-weight: 600;
            background-color: #0C0E12;
        }
        .badge-new {
            background: var(--accent);
            color: #000;
            font-size: 0.7rem;
            padding: 2px 8px;
            border-radius: 30px;
            font-weight: 700;
            margin-left: 12px;
            vertical-align: middle;
        }
        /* 关于Ledger & FAQ 样式 */
        .about-ledger {
            background: var(--bg-elevated);
            border-radius: 48px;
            padding: 48px 40px;
            margin: 40px 0 60px;
            border: 1px solid var(--border-dim);
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            align-items: center;
        }
        .about-text {
            flex: 2;
        }
        .about-text h2 {
            font-size: 2rem;
            margin-bottom: 20px;
            font-weight: 700;
        }
        .about-text p {
            color: var(--text-secondary);
            margin-bottom: 20px;
            line-height: 1.6;
        }
        .about-stats {
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 24px;
            background: #0D0F12;
            padding: 28px;
            border-radius: 32px;
            border-left: 4px solid var(--accent);
        }
        .stat-item {
            text-align: center;
        }
        .stat-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--accent);
        }
        .stat-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
        }
        .faq-section {
            margin: 60px 0 50px;
        }
        .faq-grid {
            display: flex;
            flex-direction: column;
            gap: 20px;
            margin-top: 40px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: 24px;
            border: 1px solid var(--border-dim);
            transition: 0.2s;
            overflow: hidden;
        }
        .faq-question {
            padding: 20px 28px;
            font-size: 1.2rem;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: var(--bg-card);
            transition: 0.2s;
        }
        .faq-question:hover {
            background: #1A1E22;
        }
        .faq-question i {
            color: var(--accent);
            transition: transform 0.3s;
        }
        .faq-answer {
            padding: 0 28px 20px 28px;
            color: var(--text-secondary);
            line-height: 1.6;
            border-top: 1px solid transparent;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.2s;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding-bottom: 24px;
            border-top-color: var(--border-dim);
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        /* CTA区域 */
        .cta-section {
            background: linear-gradient(135deg, #111315 0%, #050608 100%);
            border-radius: 48px;
            padding: 56px 40px;
            text-align: center;
            margin: 50px 0 70px;
            border: 1px solid var(--border-dim);
        }
        .cta-section h3 {
            font-size: 2rem;
            margin-bottom: 16px;
        }
        /* 页脚 */
        footer {
            border-top: 1px solid var(--border-dim);
            padding: 40px 0 30px;
            margin-top: 40px;
            color: var(--text-secondary);
            font-size: 0.85rem;
            text-align: center;
        }
        footer a {
            color: var(--text-secondary);
            text-decoration: none;
        }
        footer a:hover {
            color: var(--accent);
        }
        @media (max-width: 780px) {
            .hero h1 { font-size: 2.3rem; }
            .section-title { font-size: 1.8rem; }
            .nav-flex { flex-direction: column; }
            .nav-links { flex-wrap: wrap; justify-content: center; }
            .container { padding: 0 20px; }
            .cta-section { padding: 36px 24px; }
            .about-ledger { flex-direction: column; padding: 32px 24px; }
        }
        @media (max-width: 480px) {
            .product-info h3 { font-size: 1.5rem; }
        }
        /* 结构化SEO辅助 */
        [data-seo] {
            visibility: hidden;
            height: 0;
            width: 0;
            display: none;
        }