@media (max-width: 991px) {
    html {
        background: #ffffff;
    }

    body {
        margin: 0;
        color: #172033;
        background: #ffffff;
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        -webkit-font-smoothing: antialiased;
    }

    #mobile.mobile-download {
        display: block;
        min-height: 100vh;
        min-height: 100svh;
        overflow: hidden;
        background: #ffffff;
    }

    .mobile-hero {
        min-height: calc(100svh - 42px);
        padding-top: env(safe-area-inset-top);
        overflow: hidden;
        background: #f2f7ff;
    }

    .mobile-nav {
        display: flex;
        align-items: center;
        justify-content: space-between;
        min-height: 76px;
        padding: 14px 22px;
    }

    .mobile-brand {
        display: flex;
        align-items: center;
        min-width: 0;
    }

    .mobile-brand img {
        width: 42px;
        height: 42px;
        flex: 0 0 42px;
        border-radius: 8px;
        box-shadow: 0 6px 18px rgba(30, 111, 226, 0.16);
    }

    .mobile-brand div {
        display: flex;
        flex-direction: column;
        margin-left: 10px;
    }

    .mobile-brand strong {
        color: #172033;
        font-size: 16px;
        line-height: 22px;
        font-weight: 700;
    }

    .mobile-brand span {
        color: #758196;
        font-size: 11px;
        line-height: 16px;
    }

    .mobile-nav-note {
        color: #67758d;
        font-size: 12px;
        line-height: 18px;
        white-space: nowrap;
    }

    .mobile-hero-copy {
        position: relative;
        z-index: 2;
        padding: 32px 24px 22px;
    }

    .mobile-eyebrow {
        margin: 0 0 12px;
        color: #1670e6;
        font-size: 13px;
        line-height: 20px;
        font-weight: 700;
    }

    .mobile-hero h1 {
        margin: 0;
        color: #172033;
        font-size: 36px;
        line-height: 1.22;
        font-weight: 750;
        letter-spacing: 0;
    }

    .mobile-hero-desc {
        max-width: 520px;
        margin: 18px 0 0;
        color: #59677d;
        font-size: 15px;
        line-height: 1.75;
    }

    .mobile-capabilities {
        position: relative;
        z-index: 2;
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        margin: 0 24px;
        padding: 17px 0;
        border-top: 1px solid rgba(89, 112, 145, 0.2);
        border-bottom: 1px solid rgba(89, 112, 145, 0.2);
    }

    .mobile-capabilities div {
        display: flex;
        flex-direction: column;
        min-width: 0;
        padding: 0 12px;
        border-left: 1px solid rgba(89, 112, 145, 0.18);
        text-align: center;
    }

    .mobile-capabilities div:first-child {
        padding-left: 0;
        border-left: 0;
    }

    .mobile-capabilities div:last-child {
        padding-right: 0;
    }

    .mobile-capabilities strong {
        color: #26334a;
        font-size: 14px;
        line-height: 20px;
        font-weight: 700;
        white-space: nowrap;
    }

    .mobile-capabilities span {
        margin-top: 3px;
        color: #8792a5;
        font-size: 11px;
        line-height: 16px;
        white-space: nowrap;
    }

    .mobile-hero-visual {
        position: relative;
        height: clamp(420px, 56svh, 620px);
        margin-top: 22px;
        overflow: hidden;
        background: #e8f4ff;
    }

    .mobile-hero-visual img {
        display: block;
        width: 100%;
        height: 100%;
        object-fit: cover;
        object-position: center center;
    }

    .mobile-feature-band {
        padding: 56px 24px calc(126px + env(safe-area-inset-bottom));
        background: #ffffff;
    }

    .mobile-feature-band h2 {
        max-width: 500px;
        margin: 0;
        color: #172033;
        font-size: 28px;
        line-height: 1.35;
        font-weight: 720;
        letter-spacing: 0;
    }

    .mobile-feature-list {
        margin-top: 32px;
        border-top: 1px solid #e2e8f1;
    }

    .mobile-feature-list div {
        display: grid;
        grid-template-columns: 44px 1fr;
        align-items: center;
        min-height: 64px;
        border-bottom: 1px solid #e2e8f1;
    }

    .mobile-feature-list span {
        color: #1670e6;
        font-size: 12px;
        font-weight: 700;
    }

    .mobile-feature-list strong {
        color: #354158;
        font-size: 15px;
        line-height: 22px;
        font-weight: 600;
    }

    .mobile-download-dock {
        position: fixed;
        right: 0;
        bottom: 0;
        left: 0;
        z-index: 1000;
        padding: 10px 18px calc(10px + env(safe-area-inset-bottom));
        background: rgba(255, 255, 255, 0.96);
        border-top: 1px solid rgba(96, 116, 145, 0.16);
        box-shadow: 0 -8px 24px rgba(29, 56, 92, 0.08);
        -webkit-backdrop-filter: blur(16px);
        backdrop-filter: blur(16px);
    }

    #mobile .mobile-download-dock .btn_install {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 100%;
        height: 54px;
        margin: 0;
        padding: 0 18px;
        color: #ffffff;
        background: #1670e6;
        background-image: none;
        border: 0;
        border-radius: 8px;
        box-shadow: 0 8px 22px rgba(22, 112, 230, 0.24);
        text-align: center;
        text-decoration: none;
        box-sizing: border-box;
    }

    #mobile .mobile-download-dock .btn_install:active {
        background: #0e61ca;
        transform: translateY(1px);
    }

    .mobile-download-dock .btn_install span {
        font-size: 17px;
        line-height: 24px;
        font-weight: 700;
    }

    .mobile-download-dock .btn_install small {
        margin-left: 10px;
        padding-left: 10px;
        color: rgba(255, 255, 255, 0.8);
        border-left: 1px solid rgba(255, 255, 255, 0.3);
        font-size: 11px;
        line-height: 18px;
        font-weight: 400;
    }
}

@media (max-width: 359px) {
    .mobile-nav,
    .mobile-hero-copy,
    .mobile-feature-band {
        padding-right: 18px;
        padding-left: 18px;
    }

    .mobile-nav-note {
        display: none;
    }

    .mobile-hero h1 {
        font-size: 32px;
    }

    .mobile-capabilities {
        margin-right: 18px;
        margin-left: 18px;
    }

    .mobile-capabilities div {
        padding-right: 6px;
        padding-left: 6px;
    }

    .mobile-capabilities strong {
        font-size: 13px;
    }
}

@media (min-width: 992px) {
    #mobile.mobile-download {
        display: none;
    }
}