.index_main {
    position: relative;
    width: 100%;
    min-height: 200px;
    display: block;
    margin: 0 auto;
    overflow: hidden; 
}
 .main-container {
            flex: 1;
            display: flex;
            align-items: center;
            justify-content: center;
            max-width: 1400px;
            margin: 0 auto;
            width: 100%;
            min-height: 85vh; /* 增加 hero 区域的最小高度 */
            padding: 4rem 5%; /* 增加上下内边距 */
            z-index: 1;
            gap: 8%;
        }

        .left-content {
            flex: 0 0 350px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .logo-container {
            display: flex;
            align-items: baseline;
            margin-bottom: 10px;
        }

        .logo-img {
            height: 60px;
            width: auto;
            margin-right: 15px;
        }

        .slogan {
            font-size: 16px;
            color: #aaaaaa;
            margin-bottom: 40px;
            letter-spacing: 2px;
        }

        .btn {
            display: flex;
            align-items: center;
            justify-content: center;
            background: #ffffff;
            color: #000000;
            text-decoration: none;
            border-radius: 30px;
            font-size: 16px;
            font-weight: 500;
            transition: all 0.3s ease;
            cursor: pointer;
            border: none;
        }

        .btn:hover {
            opacity: 0.9;
            transform: translateY(-2px);
        }

        .btn-icon {
            margin-right: 8px;
            width: 20px;
            height: 20px;
        }

        .download-pc {
            padding: 16px 30px;
            margin-bottom: 20px;
            width: 100%;
        }

        .mobile-btns {
            display: flex;
            gap: 15px;
            margin-bottom: 30px;
        }

        .download-mobile {
            flex: 1;
            padding: 16px 10px;
        }

        .links {
            display: flex;
            gap: 25px;
            font-size: 14px;
        }

        .links a {
            color: #888888;
            text-decoration: none;
            transition: color 0.3s ease;
        }

        .links a:hover {
            color: #ffffff;
        }

        .right-content {
            flex: 1;
            position: relative;
            display: flex;
            justify-content: center;
            align-items: center;
            max-width: 800px;
        }

        .mockup-laptop {
            width: 100%;
            height: auto;
            object-fit: contain;
            filter: drop-shadow(0 20px 40px rgba(0,0,0,0.5));
            z-index: 1;
        }

        .mockup-phone {
            position: absolute;
            right: -5%;
            bottom: -10%;
            width: 30%;
            height: auto;
            filter: drop-shadow(0 20px 40px rgba(0,0,0,0.6));
            z-index: 2;
        }

        .footer {
            z-index: 1;
            text-align: center;
            padding: 30px 20px;
            color: #555555;
            font-size: 12px;
            line-height: 2;
            background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
        }

        .footer p {
            margin: 0;
        }

        .footer a {
            color: #555555;
            text-decoration: none;
            margin: 0 8px;
            transition: color 0.3s ease;
        }

        .footer a:hover {
            color: #888888;
        }

        /* 历史版本下载区域 */
        .history-versions {
            width: 100%;
            max-width: 1400px;
            margin: 0 auto;
            padding: 60px 5%;
            z-index: 1;
            position: relative;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }
        
        .history-title {
            font-size: 24px;
            font-weight: 600;
            margin-bottom: 30px;
            text-align: center;
            color: #ffffff;
        }
        
        .history-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 24px;
            justify-content: center;
        }
        
        .history-item {
            background: rgba(255, 255, 255, 0.08);
            border-radius: 16px;
            padding: 24px;
            display: flex;
            flex-direction: column;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.05);
            transition: all 0.3s ease;
        }

        .history-item:hover {
            transform: translateY(-4px);
            background: rgba(255, 255, 255, 0.12);
            border-color: rgba(255, 255, 255, 0.1);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
        }

        .history-version-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 12px;
        }

        .history-version-name {
            font-size: 20px;
            font-weight: 600;
            color: #ffffff;
        }

        .history-version-badge {
            background: rgba(255, 255, 255, 0.15);
            padding: 4px 10px;
            border-radius: 20px;
            font-size: 12px;
            color: #dddddd;
        }

        .history-version-desc {
            font-size: 14px;
            color: #aaaaaa;
            margin-bottom: 24px;
            line-height: 1.5;
            flex-grow: 1;
        }

        .history-download-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 12px 20px;
            background: #ffffff;
            color: #000000;
            text-decoration: none;
            border-radius: 24px;
            font-size: 14px;
            font-weight: 500;
            transition: all 0.3s ease;
        }

        .history-download-btn:hover {
            opacity: 0.9;
            transform: scale(1.02);
        }

        /* FAQ 区域 */
        .faq-section {
            width: 100%;
            max-width: 1000px;
            margin: 0 auto;
            padding: 60px 5%;
            z-index: 1;
            position: relative;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }

        .faq-title {
            font-size: 24px;
            font-weight: 600;
            margin-bottom: 40px;
            text-align: center;
            color: #ffffff;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .faq-item {
            background: rgba(255, 255, 255, 0.05);
            border-radius: 12px;
            padding: 24px;
            border: 1px solid rgba(255, 255, 255, 0.05);
            transition: background 0.3s ease;
        }

        .faq-item:hover {
            background: rgba(255, 255, 255, 0.08);
        }

        .faq-question {
            font-size: 18px;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
        }
        
        .faq-question::before {
            content: "Q";
            display: inline-block;
            background: #ffffff;
            color: #000000;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            text-align: center;
            line-height: 24px;
            font-size: 14px;
            margin-right: 12px;
            flex-shrink: 0;
        }

        .faq-answer {
            font-size: 15px;
            color: #aaaaaa;
            line-height: 1.6;
            padding-left: 36px;
        }

        /* 响应式调整 */
        @media (max-width: 1024px) {
            .main-container {
                flex-direction: column;
                text-align: center;
                gap: 40px;
            }
            .left-content {
                align-items: center;
                flex: none;
            }
            .right-content {
                width: 100%;
            }
            .mockup-phone {
                right: 5%;
                bottom: -5%;
            }
        }