.index_main {
    position: relative;
    width: 100%;
    min-height: 200px;
    display: block;
    margin: 0 auto;
    overflow: hidden; 
}
.index_mainbox {
    position: relative;
    width: 100%;
    max-width: 1200px;
    display: block;
    margin: 0 auto;

}

.tg-landing-wrapper {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        color: #222;
        background-color: #f4f4f4;
        max-width: 100%;
        overflow-x: hidden;
        box-sizing: border-box;
    }

    /* 顶部 Hero 区域 */
    .tg-hero-section {
        background: linear-gradient(135deg, #3390ec 0%, #2481cc 100%);
        padding: 100px 40px;
        display: flex;
        justify-content: center;
        align-items: center;
        color: #ffffff;
        text-align: center;
        position: relative;
        overflow: hidden;
    }

    .tg-hero-container {
        max-width: 1200px;
        width: 100%;
        z-index: 2;
    }

    .tg-hero-logo {
        width: 140px;
        height: 140px;
        margin: 0 auto 30px;
        background: #ffffff;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
        animation: planeFloat 4s ease-in-out infinite;
    }

    .tg-hero-logo svg {
        width: 80px;
        height: 80px;
        fill: #3390ec;
        margin-right: 5px; /* 纸飞机微调居中 */
    }

    .tg-hero-title {
        font-size: 54px;
        font-weight: 700;
        margin-bottom: 20px;
        letter-spacing: -0.5px;
color: #ffffff;
    }

    .tg-hero-subtitle {
        font-size: 20px;
        line-height: 1.6;
        max-width: 700px;
        margin: 0 auto 40px;
        color: rgba(255, 255, 255, 0.9);
    }

    /* 下载按钮 */
    .tg-btn-primary {
        display: inline-block;
        background-color: #ffffff;
        color: #3390ec;
        padding: 18px 50px;
        font-size: 20px;
        font-weight: 700;
        border-radius: 50px;
        text-decoration: none;
        transition: all 0.3s ease;
        box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        margin-bottom: 20px;
        animation: btnPulse 2.5s infinite;
    }

    .tg-btn-primary:hover {
        transform: translateY(-3px);
        box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
        background-color: #f8f9fa;
    }

    /* 其他端下载链接 */
    .tg-platforms {
        display: flex;
        justify-content: center;
        flex-wrap: wrap;
        gap: 25px;
        margin-top: 20px;
    }

    .tg-platform-link {
        color: rgba(255, 255, 255, 0.85);
        text-decoration: none;
        font-size: 15px;
        display: flex;
        align-items: center;
        gap: 8px;
        transition: color 0.2s;
    }

    .tg-platform-link:hover {
        color: #ffffff;
        text-decoration: underline;
    }

    .tg-platform-link svg {
        width: 20px;
        height: 20px;
        fill: currentColor;
    }

    /* 功能特性区域 */
    .tg-features-section {
        padding: 100px 20px;
        background: #ffffff;
        text-align: center;
    }

    .tg-section-container {
        max-width: 1200px;
        margin: 0 auto;
    }

    .tg-section-title {
        font-size: 36px;
        font-weight: 700;
        margin-bottom: 60px;
        color: #17212b;
    }

    .tg-features-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
        gap: 40px;
    }

    .tg-feature-card {
        padding: 30px;
        border-radius: 20px;
        transition: all 0.3s ease;
        text-align: left;
    }

    .tg-feature-card:hover {
        background: #f8fafc;
        transform: translateY(-5px);
    }

    .tg-feature-icon {
        width: 60px;
        height: 60px;
        background: #eef6fd;
        border-radius: 15px;
        display: flex;
        align-items: center;
        justify-content: center;
        margin-bottom: 25px;
        color: #3390ec;
    }

    .tg-feature-icon svg {
        width: 32px;
        height: 32px;
        fill: currentColor;
    }

    .tg-feature-name {
        font-size: 22px;
        font-weight: 700;
        margin-bottom: 15px;
        color: #17212b;
    }

    .tg-feature-desc {
        font-size: 16px;
        line-height: 1.7;
        color: #707579;
    }

    /* 统计数据区域 */
    .tg-stats-section {
        background: #17212b;
        padding: 80px 20px;
        color: #ffffff;
        text-align: center;
    }

    .tg-stats-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 40px;
        max-width: 1000px;
        margin: 0 auto;
    }

    .tg-stat-number {
        font-size: 48px;
        font-weight: 800;
        color: #3390ec;
        margin-bottom: 10px;
        display: block;
    }

    .tg-stat-label {
        font-size: 16px;
        color: rgba(255, 255, 255, 0.7);
        text-transform: uppercase;
        letter-spacing: 1px;
    }

    /* FAQ 区域 */
    .tg-faq-section {
        padding: 100px 20px;
        background: #f4f4f4;
    }

    .tg-faq-container {
        max-width: 800px;
        margin: 0 auto;
    }

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

    .tg-faq-item {
        background: #ffffff;
        border-radius: 12px;
        padding: 25px;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.03);
    }

    .tg-faq-question {
        font-size: 18px;
        font-weight: 700;
        color: #17212b;
        margin-bottom: 15px;
        display: flex;
        align-items: center;
        gap: 12px;
    }

    .tg-faq-question::before {
        content: "Q";
        background: #3390ec;
        color: #ffffff;
        width: 24px;
        height: 24px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 14px;
        font-weight: 800;
        flex-shrink: 0;
    }

    .tg-faq-answer {
        font-size: 15px;
        line-height: 1.7;
        color: #707579;
        padding-left: 36px;
    }

    /* 动画定义 */
    @keyframes planeFloat {
        0%, 100% { transform: translateY(0) rotate(0deg); }
        50% { transform: translateY(-20px) rotate(5deg); }
    }

    @keyframes btnPulse {
        0% { transform: scale(1); box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1); }
        50% { transform: scale(1.03); box-shadow: 0 15px 35px rgba(51, 144, 236, 0.3); }
        100% { transform: scale(1); box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1); }
    }

    /* 响应式适配 */
    @media (max-width: 768px) {
        .tg-hero-title { font-size: 36px; }
        .tg-hero-subtitle { font-size: 18px; }
        .tg-hero-section { padding: 60px 20px; }
        .tg-btn-primary { width: 100%; box-sizing: border-box; }
        .tg-features-grid { grid-template-columns: 1fr; }
    }