/* 保持原有核心风格，并扩展创意板块样式 (完全延续设计语言) */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: system-ui, -apple-system, 'Segoe UI', 'Helvetica Neue', Helvetica, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background-color: #ffffff;
            color: #1e293b;
            line-height: 1.5;
            scroll-behavior: smooth;
        }

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

        .navbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            flex-wrap: wrap;
            gap: 20px;
            border-bottom: 1px solid #e9eef3;
        }

        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            background: linear-gradient(135deg, #1e2b3c, #2b5f8a);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
            letter-spacing: -0.3px;
        }

        .nav-links {
            display: flex;
            gap: 32px;
            align-items: center;
            flex-wrap: wrap;
        }

        .nav-links a {
            text-decoration: none;
            font-weight: 500;
            color: #334155;
            transition: color 0.2s;
            font-size: 1rem;
        }

        .nav-links a:hover {
            color: #2b5f8a;
        }

        .nav-links .active {
            color: #2b5f8a;
            border-bottom: 2px solid #2b5f8a;
            padding-bottom: 4px;
        }

        .btn-outline {
            display: inline-block;
            background: transparent;
            border: 1.5px solid #1e4a76;
            color: #1e4a76;
            font-weight: 600;
            padding: 10px 24px;
            border-radius: 40px;
            text-decoration: none;
            transition: 0.2s;
        }

        .btn-outline:hover {
            background-color: #eef4ff;
        }

        .download-hero {
            text-align: center;
            padding: 60px 0 40px;
        }

        .download-hero h1 {
            font-size: 3rem;
            font-weight: 800;
            background: linear-gradient(135deg, #0f2b3d, #2b6a9f);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
            margin-bottom: 16px;
        }

        .download-hero p {
            font-size: 1.2rem;
            color: #475569;
            max-width: 700px;
            margin: 0 auto;
        }

        .official-badge {
            display: flex;
            justify-content: center;
            gap: 24px;
            flex-wrap: wrap;
            margin: 20px 0 30px;
        }

        .badge {
            background: #eef2ff;
            padding: 8px 18px;
            border-radius: 60px;
            font-size: 0.85rem;
            font-weight: 500;
            color: #1e4a76;
        }

        .platform-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 32px;
            margin: 48px 0 60px;
        }

        .platform-card {
            background: #ffffff;
            border-radius: 32px;
            padding: 36px 24px;
            text-align: center;
            box-shadow: 0 20px 35px -12px rgba(0, 0, 0, 0.08);
            border: 1px solid #eef2f6;
            transition: transform 0.25s ease, box-shadow 0.25s;
        }

        .platform-card:hover {
            transform: translateY(-6px);
            box-shadow: 0 28px 40px -16px rgba(0, 0, 0, 0.12);
        }

        .platform-icon {
            font-size: 3.5rem;
            margin-bottom: 20px;
        }

        .platform-card h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: #0f2b3d;
        }

        .platform-desc {
            color: #5b6e8c;
            margin-bottom: 24px;
            font-size: 0.95rem;
        }

        .version-info {
            background: #f8fafc;
            border-radius: 40px;
            padding: 6px 14px;
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 500;
            color: #2c5a7a;
            margin-bottom: 20px;
        }

        .download-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background-color: #1e4a76;
            color: white;
            font-weight: 600;
            padding: 14px 32px;
            border-radius: 60px;
            text-decoration: none;
            transition: all 0.25s;
            border: none;
            cursor: pointer;
            font-size: 1rem;
            box-shadow: 0 2px 5px rgba(0,0,0,0.05);
        }

        .download-btn:hover {
            background-color: #0f3a5c;
            transform: scale(1.02);
        }

        .btn-secondary {
            background-color: #2c3e50;
        }

        .note-box {
            background: #f0f6fe;
            border-radius: 24px;
            padding: 28px 32px;
            margin: 20px 0 50px;
            border-left: 5px solid #2b6a9f;
        }

        .note-box h3 {
            font-size: 1.3rem;
            margin-bottom: 12px;
            color: #1e4a76;
        }

        .note-box ul {
            padding-left: 20px;
            color: #2d3a4b;
        }

        .note-box li {
            margin: 8px 0;
        }

        /* 新增创意板块 */
        .feature-ribbon {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            margin: 40px 0;
            background: #ffffff;
            border-radius: 40px;
            padding: 28px 32px;
            border: 1px solid #e9f0f8;
            box-shadow: 0 8px 20px -8px rgba(0,0,0,0.04);
        }

        .ribbon-item {
            flex: 1;
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .ribbon-icon {
            font-size: 2.4rem;
        }

        .quick-setup-steps {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            margin: 48px 0;
        }

        .setup-card {
            flex: 1;
            background: #fbfdff;
            border-radius: 28px;
            padding: 24px 20px;
            border: 1px solid #e2ebf6;
        }

        .step-num {
            background: #1e4a76;
            color: white;
            width: 36px;
            height: 36px;
            border-radius: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .testimonial-compact {
            background: linear-gradient(145deg, #f6faff, #ffffff);
            border-radius: 32px;
            padding: 32px;
            margin: 40px 0;
        }

        .stats-banner {
            display: flex;
            justify-content: space-around;
            flex-wrap: wrap;
            text-align: center;
            background: #1e2f3c;
            color: white;
            border-radius: 60px;
            padding: 28px 24px;
            margin: 40px 0;
        }

        .stat-item h3 {
            font-size: 2.2rem;
            font-weight: 800;
        }

        .global-download-cta {
            background: linear-gradient(120deg, #f0f6fe, #ffffff);
            border-radius: 48px;
            padding: 48px 32px;
            text-align: center;
            border: 1px solid #d4e3f5;
            margin-bottom: 30px;
        }

        .footer {
            background-color: #f9fbfd;
            border-top: 1px solid #e9edf2;
            padding: 40px 0 24px;
            margin-top: 40px;
            text-align: center;
            font-size: 0.85rem;
            color: #6c7a91;
        }

        @media (max-width: 680px) {
            .download-hero h1 {
                font-size: 2.2rem;
            }
            .navbar {
                flex-direction: column;
                align-items: flex-start;
            }
            .platform-card {
                padding: 28px 16px;
            }
        }
        .btn-large-download {
            background: #000;
            padding: 18px 44px;
            font-size: 1.3rem;
            border-radius: 60px;
            display: inline-flex;
            align-items: center;
            gap: 12px;
            color: white;
            text-decoration: none;
            font-weight: 700;
            margin: 20px 0 10px;
            box-shadow: 0 10px 20px -5px rgba(0,0,0,0.2);
        }