* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "Microsoft Yahei", sans-serif;
        }

        body {
            background-color: #0f141c;
            color: #e5e7eb;
            line-height: 1.6;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }

        /* 头部导航 */
        header {
            background-color: #182230;
            padding: 18px 0;
            box-shadow: 0 2px 10px rgba(0,0,0,0.4);
            position: sticky;
            top: 0;
            z-index: 99;
        }

        .header-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-size: 24px;
            font-weight: bold;
            color: #38bdf8;
        }

        .logo span {
            color: #f97316;
        }

        /* 主图模块 */
        .banner {
            width: 100%;
            height: auto;
            margin: 30px 0;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 4px 20px rgba(56, 189, 248, 0.15);
        }

        .banner-img {
            width: 100%;
            height: 380px;
            background-color: #1e293b;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #94a3b8;
            font-size: 20px;
        }

        /* 下载按钮区域 */
        .download-box {
            text-align: center;
            margin: 40px 0;
            padding: 30px;
            background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
            border-radius: 12px;
        }

        .download-title {
            font-size: 26px;
            margin-bottom: 25px;
            color: #ffffff;
        }

        .download-btn {
            display: inline-block;
            padding: 16px 50px;
            background: linear-gradient(90deg, #38bdf8, #0ea5e9);
            color: #fff;
            font-size: 18px;
            font-weight: bold;
            text-decoration: none;
            border-radius: 50px;
            transition: opacity 0.3s;
        }

        .download-btn:hover {
            opacity: 0.85;
        }

        /* 通用区块标题 */
        .section-title {
            font-size: 22px;
            color: #38bdf8;
            margin: 50px 0 20px;
            padding-left: 12px;
            border-left: 4px solid #f97316;
        }

        /* 功能卡片模块 */
        .card-list {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin: 30px 0;
        }

        .card-item {
            background-color: #182230;
            padding: 25px 20px;
            border-radius: 10px;
            text-align: center;
            box-shadow: 0 2px 8px rgba(0,0,0,0.3);
        }

        .card-icon {
            width: 60px;
            height: 60px;
            background-color: #1e293b;
            border-radius: 50%;
            margin: 0 auto 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #f97316;
            font-size: 24px;
        }

        .card-item h3 {
            font-size: 16px;
            margin-bottom: 8px;
            color: #fff;
        }

        .card-item p {
            font-size: 14px;
            color: #94a3b8;
        }

        /* 功能介绍、教程、FAQ 通用内容块 */
        .content-block {
            background-color: #182230;
            padding: 25px;
            border-radius: 10px;
            margin-bottom: 25px;
        }

        .content-block p,
        .content-block li {
            font-size: 15px;
            color: #cbd5e1;
            margin-bottom: 12px;
        }

        .content-block ul {
            padding-left: 20px;
        }

        /* 底部参数模块 */
        footer {
            margin-top: 60px;
            padding: 40px 0;
            background-color: #111827;
            border-top: 1px solid #1e293b;
        }

        .footer-inner {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .footer-col h4 {
            font-size: 17px;
            color: #38bdf8;
            margin-bottom: 18px;
        }

        .footer-col p {
            font-size: 14px;
            color: #94a3b8;
            margin-bottom: 8px;
        }

        .copyright {
            text-align: center;
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid #1e293b;
            font-size: 13px;
            color: #64748b;
        }

        /* 移动端自适应适配 */
        @media (max-width: 992px) {
            .card-list {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-inner {
                grid-template-columns: repeat(2, 1fr);
            }
            .banner-img {
                height: 260px;
            }
        }

        @media (max-width: 576px) {
            .card-list {
                grid-template-columns: 1fr;
            }
            .footer-inner {
                grid-template-columns: 1fr;
            }
            .download-title {
                font-size: 22px;
            }
            .download-btn {
                width: 100%;
                padding: 14px 0;
            }
            .banner-img {
                height: 180px;
            }
            .logo {
                font-size: 20px;
            }
        }