* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        }
        body {
            color: #333;
            line-height: 1.6;
        }
        header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 5%;
            background: #fff;
            box-shadow: 0 2px 4px rgba(0,0,0,0.05);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo img {
            height: 32px;
            width: 32px;
            object-fit: contain;
            display: block;
        }
        .logo span {
            font-size: 1.25rem;
            font-weight: 600;
            color: #165DFF;
        }
        /* 导航栏 */
        nav {
            display: flex;
            align-items: center;
        }
        .nav-right {
            display: flex;
            gap: 2rem;
            align-items: center;
        }
        .nav-right a {
            text-decoration: none;
            color: #333;
            font-size: 0.95rem;
            transition: color 0.2s;
        }
        .nav-right a:hover {
            color: #165DFF;
        }
        .nav-right a.active {
            color: #165DFF;
            font-weight: 500;
        }
        .lang-switch {
            display: flex;
            align-items: center;
            gap: 0.3rem;
            cursor: pointer;
            font-size: 0.95rem;
        }
        /* 英雄区 */
        .hero {
            display: grid;
            grid-template-columns: 1fr 1fr;
            padding: 4rem 5%;
            background: linear-gradient(135deg, #fff 0%, #f0f7ff 100%);
            position: relative;
            overflow: hidden;
        }
        .hero::after {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 60%;
            height: 100%;
            background: linear-gradient(135deg, #4080FF 0%, #7B61FF 100%);
            clip-path: ellipse(70% 80% at 80% 20%);
            z-index: 0;
        }
        .hero-content {
            position: relative;
            z-index: 1;
            max-width: 500px;
        }
        .hero-title {
            font-size: 2.5rem;
            line-height: 1.2;
            margin-bottom: 1.5rem;
            color: #1D2129;
        }
        .hero-content p {
            font-size: 1.1rem;
            color: #4E5969;
            margin-bottom: 1.5rem;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 1.5rem;
            background: #165DFF;
            color: #fff;
            border: none;
            border-radius: 6px;
            font-size: 1rem;
            cursor: pointer;
            text-decoration: none;
            transition: background 0.2s;
        }
        .btn:hover {
            background: #0D47A1;
        }
        .hero-mockup {
            position: relative;
            z-index: 1;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .hero-mockup img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .features {
            padding: 4rem 5%;
            text-align: center;
        }
        .features h2 {
            font-size: 2rem;
            margin-bottom: 3rem;
            color: #1D2129;
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 2rem;
        }
        .feature-card {
            padding: 1.5rem;
            border-radius: 8px;
            transition: box-shadow 0.2s;
        }
        .feature-card:hover {
            box-shadow: 0 4px 12px rgba(0,0,0,0.08);
        }
        .feature-icon {
            width: 60px;
            height: 60px;
            margin: 0 auto 1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            background: #f5f7fa;
            border-radius: 50%;
        }
        .feature-icon svg {
            width: 30px;
            height: 30px;
            stroke: #165DFF;
            stroke-width: 2;
            fill: none;
        }
        .feature-card h3 {
            font-size: 1.1rem;
            margin-bottom: 0.75rem;
            color: #1D2129;
        }
        .feature-card p {
            font-size: 0.9rem;
            color: #4E5969;
        }
        /* 下载区 */
        .download {
            padding: 4rem 5%;
            text-align: center;
            background: #fafafa;
        }
        .download h2 {
            font-size: 2rem;
            margin-bottom: 2rem;
            color: #1D2129;
        }
        .download-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            align-items: center;
            max-width: 1000px;
            margin: 0 auto;
        }
        .download-mockup img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .download-buttons {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            align-items: center;
        }
        .download-btn {
            padding: 0.75rem 2rem;
            background: #165DFF;
            color: #fff;
            border: none;
            border-radius: 6px;
            font-size: 1rem;
            cursor: pointer;
            text-decoration: none;
            width: 200px;
            text-align: center;
            transition: background 0.2s;
        }
        .download-btn:hover {
            background: #0D47A1;
        }
        .download-note {
            margin-top: 1rem;
            font-size: 0.9rem;
            color: #4E5969;
        }
        .other-versions {
            margin-top: 2rem;
        }
        .other-versions a {
            color: #165DFF;
            text-decoration: none;
            margin: 0 0.5rem;
        }
        .other-versions a:hover {
            text-decoration: underline;
        }

        .news {
            padding: 3rem 5%;
            background: #fff;
            border-top: 1px solid #f2f2f2;
        }
        .news-container {
            max-width: 1000px;
            margin: 0 auto;
        }
        .news-title {
            font-size: 1.8rem;
            text-align: center;
            margin-bottom: 2rem;
            color: #1D2129;
            font-weight: 600;
        }
        .news-list {
            list-style: none;
        }
        .news-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 0;
            border-bottom: 1px solid #f2f2f2;
            font-size: 1rem;
        }
        .news-link {
            color: #333;
            text-decoration: none;
            transition: color 0.2s;
            flex: 1;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .news-link:hover {
            color: #165DFF;
        }
        .news-time {
            color: #86909C;
            font-size: 0.9rem;
            margin-left: 15px;
            white-space: nowrap;
        }
        [lang="en"] .zh, [lang="zh-CN"] .en {
            display: none !important;
        }

        footer {
            padding: 2rem 5%;
            background: #1D2129;
            color: #fff;
            text-align: center;
        }
        .footer-links {
            display: flex;
            justify-content: center;
            gap: 2rem;
            margin-bottom: 1rem;
        }
        .footer-links a {
            color: #C9CDD4;
            text-decoration: none;
            font-size: 0.9rem;
        }
        .footer-links a:hover {
            color: #fff;
        }
        .copyright {
            font-size: 0.85rem;
            color: #86909C;
        }
        /* 响应式 */
        @media (max-width: 768px) {
            .hero {
                grid-template-columns: 1fr;
                padding: 2rem 5%;
            }
            .hero::after {
                width: 100%;
                clip-path: ellipse(100% 50% at 50% 0%);
            }
            .hero-content {
                margin-bottom: 2rem;
            }
            .download-grid {
                grid-template-columns: 1fr;
            }
            .nav-right {
                gap: 1rem;
            }
            .nav-right a {
                display: none;
            }
            .nav-right a.active {
                display: inline;
            }
        }
        [lang="en"] .zh, [lang="zh-CN"] .en {
            display: none;
        }