/* 保留原有核心样式并扩展新模块效果 */
        * {
            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: #f8fafc;
            color: #0f172a;
            line-height: 1.5;
        }

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

        /* Header / Nav */
        .header {
            background-color: #ffffff;
            box-shadow: 0 1px 3px rgba(0,0,0,0.05);
            position: sticky;
            top: 0;
            z-index: 50;
            border-bottom: 1px solid #e2e8f0;
        }

        .nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            padding: 1rem 0;
        }

        .logo a {
            font-size: 1.5rem;
            font-weight: 700;
            background: linear-gradient(135deg, #2563eb, #1e40af);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
            text-decoration: none;
            letter-spacing: -0.3px;
        }

        .nav-links {
            display: flex;
            gap: 2rem;
            align-items: center;
            flex-wrap: wrap;
        }

        .nav-links a {
            text-decoration: none;
            font-weight: 500;
            color: #1e293b;
            transition: color 0.2s;
        }

        .nav-links a:hover {
            color: #2563eb;
        }

        .btn-subscribe {
            background-color: #2563eb;
            color: white !important;
            padding: 0.5rem 1.25rem;
            border-radius: 40px;
            transition: background 0.2s;
        }

        .btn-subscribe:hover {
            background-color: #1d4ed8;
        }

        /* Hero Section */
        .hero {
            text-align: center;
            padding: 4rem 0 3rem;
        }

        .hero h1 {
            font-size: 3rem;
            font-weight: 800;
            background: linear-gradient(to right, #0f172a, #2563eb);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
            margin-bottom: 1rem;
            letter-spacing: -0.02em;
        }

        .hero .tagline {
            font-size: 1.25rem;
            color: #334155;
            max-width: 700px;
            margin: 0 auto 1.5rem;
        }

        .hero-badge {
            background: #e0f2fe;
            color: #0369a1;
            display: inline-block;
            padding: 0.25rem 1rem;
            border-radius: 30px;
            font-size: 0.875rem;
            font-weight: 500;
            margin-bottom: 1.5rem;
        }

        /* 按钮组合 */
        .hero-buttons {
            display: flex;
            gap: 1rem;
            justify-content: center;
            flex-wrap: wrap;
            margin-top: 0.5rem;
        }
        .btn-download-large {
            background-color: #2563eb;
            color: white;
            padding: 0.85rem 2.2rem;
            border-radius: 48px;
            font-weight: 700;
            font-size: 1.1rem;
            transition: all 0.2s;
            box-shadow: 0 8px 16px -6px rgba(37,99,235,0.3);
            text-decoration: none;
            display: inline-block;
        }
        .btn-download-large:hover {
            background-color: #1e40af;
            transform: translateY(-2px);
            box-shadow: 0 12px 20px -8px rgba(37,99,235,0.4);
        }
        .btn-outline {
            background: transparent;
            border: 1px solid #2563eb;
            color: #2563eb;
            padding: 0.85rem 2rem;
            border-radius: 48px;
            font-weight: 600;
            text-decoration: none;
            display: inline-block;
            transition: all 0.2s;
        }
        .btn-outline:hover {
            background: #eef2ff;
            border-color: #1e40af;
        }

        /* 特性卡片 */
        .features {
            padding: 3rem 0 2rem;
        }

        .section-title {
            text-align: center;
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 2.5rem;
            color: #0f172a;
        }

        .cards-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 2rem;
        }

        .card {
            background: #ffffff;
            border-radius: 1.5rem;
            padding: 1.75rem;
            box-shadow: 0 10px 25px -5px rgba(0,0,0,0.05), 0 2px 4px -2px rgba(0,0,0,0.02);
            transition: transform 0.2s, box-shadow 0.2s;
            border: 1px solid #eef2ff;
        }

        .card:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 30px -12px rgba(0,0,0,0.1);
        }

        .card-icon {
            font-size: 2.5rem;
            margin-bottom: 1rem;
        }

        .card h3 {
            font-size: 1.5rem;
            font-weight: 600;
            margin-bottom: 0.75rem;
        }

        .card p {
            color: #334155;
            line-height: 1.5;
        }

        /* 平台下载专区 新板块 */
        .platform-download {
            background: #ffffff;
            border-radius: 2rem;
            padding: 2rem;
            margin: 2rem 0;
            border: 1px solid #e2e8f0;
            box-shadow: 0 8px 20px rgba(0,0,0,0.02);
        }
        .platform-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            justify-content: center;
            margin: 1.5rem 0 0.5rem;
        }
        .platform-item {
            background: #f8fafc;
            border-radius: 1.5rem;
            padding: 1.2rem 1.5rem;
            text-align: center;
            flex: 1 1 160px;
            transition: all 0.2s;
            border: 1px solid #eef2ff;
        }
        .platform-item:hover { background: #f1f5f9; transform: translateY(-3px);}
        .platform-icon { font-size: 2.2rem; margin-bottom: 0.5rem; display: block; }
        .platform-name { font-weight: 700; font-size: 1.2rem; margin-bottom: 0.5rem; }
        .download-mini-btn {
            background-color: #2563eb;
            color: white;
            border: none;
            padding: 0.4rem 1rem;
            border-radius: 30px;
            font-size: 0.8rem;
            font-weight: 500;
            text-decoration: none;
            display: inline-block;
            margin-top: 0.5rem;
            transition: background 0.2s;
        }
        .download-mini-btn:hover { background-color: #1e40af; }

        /* 更新日志 + 性能区块 */
        .news-update {
            background: linear-gradient(115deg, #f1f5f9 0%, #ffffff 100%);
            border-radius: 2rem;
            padding: 2rem;
            margin: 2rem 0;
            border: 1px solid #e2e8f0;
        }
        .update-list { list-style: none; margin-top: 1rem; }
        .update-list li { padding: 0.6rem 0; border-bottom: 1px dashed #cbd5e1; display: flex; align-items: baseline; gap: 0.75rem; }
        .update-date { font-weight: 600; color: #2563eb; min-width: 85px; }
        .stats-grid { display: flex; gap: 2rem; justify-content: space-around; flex-wrap: wrap; margin-top: 1.5rem; text-align: center; }
        .stat-card { background: white; padding: 1.2rem 1.5rem; border-radius: 1.5rem; flex: 1; min-width: 140px; box-shadow: 0 4px 8px rgba(0,0,0,0.02);}
        .stat-number { font-size: 2rem; font-weight: 800; color: #0f172a; }
        
        /* 快速上手指南 */
        .guide {
            background: linear-gradient(135deg, #f1f5f9 0%, #ffffff 100%);
            border-radius: 2rem;
            padding: 2.5rem;
            margin: 2rem 0 2rem;
            border: 1px solid #e2e8f0;
        }

        .guide h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .steps {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            justify-content: space-between;
        }

        .step {
            flex: 1;
            min-width: 200px;
            background: white;
            padding: 1.25rem;
            border-radius: 1.25rem;
            box-shadow: 0 1px 2px rgba(0,0,0,0.05);
            border: 1px solid #eef2ff;
        }

        .step-number {
            width: 32px;
            height: 32px;
            background: #2563eb;
            color: white;
            border-radius: 60px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            margin-bottom: 1rem;
        }

        .step h3 {
            font-size: 1.25rem;
            margin-bottom: 0.5rem;
        }

        .step p {
            color: #475569;
        }

        .guide-footer {
            margin-top: 2rem;
            text-align: center;
        }

        .btn-primary {
            background-color: #2563eb;
            color: white;
            border: none;
            padding: 0.75rem 2rem;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            text-decoration: none;
            display: inline-block;
            transition: background 0.2s;
        }

        .btn-primary:hover {
            background-color: #1e40af;
        }
        
        /* FAQ 预览区 */
        .faq-preview {
            background: #ffffff;
            border-radius: 2rem;
            padding: 2rem;
            margin: 2rem 0;
            border: 1px solid #e2e8f0;
        }
        .faq-item { margin-bottom: 1.25rem; border-bottom: 1px solid #eef2ff; padding-bottom: 1rem; }
        .faq-question { font-weight: 700; font-size: 1.1rem; display: flex; gap: 0.75rem; align-items: center; color: #0f172a; }
        .faq-answer { color: #475569; margin-top: 0.5rem; padding-left: 1.8rem; }

        /* Footer */
        .footer {
            border-top: 1px solid #e2e8f0;
            background: #f9fafb;
            padding: 2rem 0;
            margin-top: 2rem;
            text-align: center;
            color: #475569;
        }

        .footer-links {
            display: flex;
            justify-content: center;
            gap: 2rem;
            flex-wrap: wrap;
            margin-bottom: 1rem;
        }

        .footer-links a {
            text-decoration: none;
            color: #334155;
        }

        .footer-links a:hover {
            color: #2563eb;
        }
        .last-updated { font-size: 0.8rem; margin-top: 1rem; color: #64748b;}

        @media (max-width: 768px) {
            .nav {
                flex-direction: column;
                gap: 1rem;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .cards-grid {
                gap: 1rem;
            }
            .steps {
                flex-direction: column;
            }
            .hero-buttons { flex-direction: column; align-items: center; }
        }