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

        body {
            font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            background-color: #f9fafc;
            color: #1e293b;
            line-height: 1.5;
            scroll-behavior: smooth;
        }

        /* 鲜艳科研配色 */
        :root {
            --primary-blue: #2D6AFF;
            --primary-blue-dark: #1e4bd2;
            --accent-green: #10B981;
            --accent-orange: #F97316;
            --bg-light: #F8FAFE;
            --card-white: #FFFFFF;
            --text-dark: #0F172A;
            --text-muted: #475569;
            --border-light: #E9EEF3;
            --shadow-sm: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.02);
            --shadow-md: 0 20px 25px -5px rgba(0, 0, 0, 0.05), 0 10px 10px -5px rgba(0, 0, 0, 0.01);
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 导航栏 */
        .navbar {
            background: rgba(255,255,255,0.96);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 50;
            padding: 16px 0;
        }

        .nav-flex {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 20px;
        }

        .logo {
            font-size: 1.8rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-green) 100%);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            letter-spacing: -0.3px;
            text-decoration: none;
        }
        .nav-links {
            display: flex;
            gap: 32px;
            font-weight: 500;
        }
        .nav-links a {
            text-decoration: none;
            color: var(--text-dark);
            transition: color 0.2s;
        }
        .nav-links a:hover {
            color: var(--primary-blue);
        }
        .btn-primary {
            background: var(--primary-blue);
            color: white;
            padding: 10px 24px;
            border-radius: 40px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all 0.2s ease;
            text-decoration: none;
            display: inline-block;
            box-shadow: 0 2px 6px rgba(45,106,255,0.2);
        }
        .btn-primary:hover {
            background: var(--primary-blue-dark);
            transform: translateY(-1px);
        }
        .btn-outline {
            border: 1.5px solid var(--primary-blue);
            background: transparent;
            color: var(--primary-blue);
            padding: 8px 22px;
            border-radius: 40px;
            font-weight: 600;
            transition: 0.2s;
            text-decoration: none;
            display: inline-block;
        }
        .btn-outline:hover {
            background: var(--primary-blue);
            color: white;
        }

        /* 页面头部 */
        .page-header {
            background: linear-gradient(135deg, #EFF6FF 0%, #FFFFFF 100%);
            padding: 64px 0 48px;
            text-align: center;
        }
        .page-header h1 {
            font-size: 3rem;
            font-weight: 800;
            background: linear-gradient(to right, #0F2B5E, var(--primary-blue));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            margin-bottom: 20px;
        }
        .page-header p {
            font-size: 1.2rem;
            color: var(--text-muted);
            max-width: 700px;
            margin: 0 auto;
        }

        /* 通用 */
        section {
            padding: 80px 0;
        }
        .section-title {
            text-align: center;
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .section-sub {
            text-align: center;
            color: var(--text-muted);
            max-width: 700px;
            margin: 0 auto 56px auto;
            font-size: 1.1rem;
        }

        /* 功能卡片网格 */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
            gap: 32px;
        }
        .feature-card {
            background: var(--card-white);
            border-radius: 28px;
            padding: 36px 28px;
            transition: transform 0.2s, box-shadow 0.2s;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            position: relative;
            overflow: hidden;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
        }
        .feature-icon {
            font-size: 3rem;
            margin-bottom: 24px;
        }
        .feature-card h3 {
            font-size: 1.6rem;
            margin-bottom: 12px;
            font-weight: 700;
        }
        .feature-card p {
            color: var(--text-muted);
            margin-bottom: 20px;
            line-height: 1.6;
        }
        .feature-tag {
            display: inline-block;
            background: #EFF6FF;
            color: var(--primary-blue);
            border-radius: 40px;
            padding: 4px 14px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-top: 8px;
        }

        /* 双栏技术详解 */
        .tech-spotlight {
            background: var(--bg-light);
            border-radius: 40px;
            padding: 48px;
            margin-top: 40px;
        }
        .two-columns {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
            align-items: center;
        }
        .col-text {
            flex: 1.2;
        }
        .col-text h3 {
            font-size: 1.8rem;
            margin-bottom: 20px;
        }
        .col-text ul {
            padding-left: 20px;
            margin: 20px 0;
        }
        .col-text li {
            margin: 12px 0;
            color: var(--text-muted);
        }
        .col-visual {
            flex: 1;
            background: white;
            border-radius: 32px;
            padding: 32px;
            text-align: center;
            box-shadow: var(--shadow-sm);
        }
        .badge-list {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 20px;
        }
        .badge-tech {
            background: #F1F5F9;
            padding: 6px 14px;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 500;
        }

        /* 图像类型表格 */
        .table-wrapper {
            overflow-x: auto;
            background: white;
            border-radius: 28px;
            box-shadow: var(--shadow-sm);
            margin: 40px 0;
        }
        .spec-table {
            width: 100%;
            border-collapse: collapse;
        }
        .spec-table th, .spec-table td {
            padding: 16px 20px;
            text-align: left;
            border-bottom: 1px solid var(--border-light);
        }
        .spec-table th {
            background: #F1F5F9;
            font-weight: 700;
        }
        .check-yes {
            color: var(--accent-green);
            font-weight: 600;
        }
        .check-partial {
            color: var(--accent-orange);
        }

        /* 伪造检测高亮区 */
        .fraud-detection {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 24px;
            margin-top: 40px;
        }
        .fraud-card {
            background: white;
            border-radius: 24px;
            padding: 24px;
            text-align: center;
            border-top: 4px solid var(--accent-orange);
        }
        .fraud-card i {
            font-size: 2.5rem;
            color: var(--accent-orange);
            margin-bottom: 16px;
        }

        .footer {
            background: #0F172A;
            color: #94A3B8;
            padding: 48px 0 24px;
            text-align: center;
        }

        @media (max-width: 768px) {
            .page-header h1 { font-size: 2.2rem; }
            .section-title { font-size: 1.8rem; }
            .tech-spotlight { padding: 28px; }
        }