:root {
    --mobile-portal-gutter: 20px;
    --mobile-portal-ink: #111b31;
    --mobile-portal-muted: #657087;
    --mobile-portal-line: #e7ebf2;
    --mobile-portal-bg: #f5f7fb;
    --mobile-portal-blue: #2f72f4;
    --mobile-portal-blue-soft: #eaf2ff;
    --mobile-portal-shadow: 0 8px 24px rgba(20, 31, 55, .07);
}

.mobile-portal-header,
.mobile-portal-bottom-nav,
.mobile-portal-page {
    display: none;
}

@media (max-width: 1024px), (hover: none) and (pointer: coarse) {
    body:has(.mobile-portal-page) {
        background: var(--mobile-portal-bg);
        color: var(--mobile-portal-ink);
    }

    body:has(.mobile-portal-page) > main {
        padding: 0;
    }

    .mobile-portal-desktop-only,
    .mobile-portal-desktop-content,
    body:has(.mobile-portal-page) > footer {
        display: none !important;
    }

    .mobile-portal-header {
        position: fixed !important;
        top: max(10px, env(safe-area-inset-top));
        right: auto;
        bottom: auto;
        left: 50%;
        z-index: 1000;
        display: flex;
        width: min(calc(520px - var(--mobile-portal-gutter) * 2), calc(100% - var(--mobile-portal-gutter) * 2));
        height: 64px;
        transform: translateX(-50%);
        align-items: center;
        padding: 0 14px;
        border: 1px solid var(--mobile-portal-line);
        border-radius: 18px;
        background: #fff;
        box-shadow: 0 5px 18px rgba(20, 31, 55, .075);
        isolation: isolate;
        will-change: transform;
    }

    .mobile-portal-brand {
        display: flex;
        align-items: center;
    }

    .mobile-portal-brand img {
        display: block;
        width: 181px;
        height: auto;
    }

    .mobile-portal-header.is-home-merged {
        border-bottom: 0;
        border-radius: 24px 24px 0 0;
        box-shadow: none;
    }

    .mobile-portal-header.is-home-merged.is-scrolled {
        border-bottom: 1px solid var(--mobile-portal-line);
        border-radius: 24px;
        box-shadow: 0 5px 18px rgba(20, 31, 55, .075);
    }

    .mobile-portal-page {
        display: block;
        width: 100%;
        max-width: 520px;
        min-height: 100vh;
        margin: 0 auto;
        padding: 96px var(--mobile-portal-gutter) calc(106px + env(safe-area-inset-bottom));
        background: var(--mobile-portal-bg);
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
        -webkit-font-smoothing: antialiased;
    }

    .mobile-home-page {
        padding-top: calc(64px + max(10px, env(safe-area-inset-top)));
    }

    .mobile-portal-bottom-nav {
        position: fixed;
        bottom: calc(10px + env(safe-area-inset-bottom));
        left: 50%;
        z-index: 70;
        display: grid;
        width: min(calc(520px - var(--mobile-portal-gutter) * 2), calc(100% - var(--mobile-portal-gutter) * 2));
        height: 68px;
        transform: translateX(-50%);
        grid-template-columns: repeat(4, 1fr);
        padding: 6px;
        border: 1px solid #e1e6ee;
        border-radius: 20px;
        background: rgba(255, 255, 255, .96);
        box-shadow: 0 8px 28px rgba(20, 31, 55, .13);
        backdrop-filter: blur(14px);
    }

    .mobile-portal-nav-item {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 3px;
        border-radius: 13px;
        color: #778297;
        font-size: 11px;
        text-decoration: none;
    }

    .mobile-portal-nav-icon {
        display: grid;
        width: 38px;
        height: 32px;
        place-items: center;
        border-radius: 11px;
    }

    .mobile-portal-nav-icon svg {
        width: 22px;
        height: 22px;
    }

    .mobile-portal-nav-item.is-active {
        color: var(--mobile-portal-blue);
        font-weight: 700;
    }

    .mobile-portal-nav-item.is-active .mobile-portal-nav-icon {
        background: var(--mobile-portal-blue-soft);
    }

    .mobile-portal-kicker {
        margin-bottom: 8px;
        color: var(--mobile-portal-blue);
        font-size: 13px;
        font-weight: 750;
        letter-spacing: .2px;
    }

    .mobile-portal-heading {
        margin: 0;
        font-size: 27px;
        font-weight: 820;
        line-height: 1.22;
        letter-spacing: -.6px;
    }

    .mobile-portal-desc {
        margin: 8px 0 0;
        color: var(--mobile-portal-muted);
        font-size: 14px;
        line-height: 1.65;
    }

    .mobile-home-hero {
        padding: 22px 19px 20px;
        border: 1px solid var(--mobile-portal-line);
        border-top: 0;
        border-radius: 0 0 24px 24px;
        background: #fff;
        box-shadow: var(--mobile-portal-shadow);
    }

    .mobile-home-title {
        margin: 0 0 9px;
        font-size: 29px;
        font-weight: 820;
        line-height: 1.2;
        letter-spacing: -.7px;
    }

    .mobile-home-hero p {
        margin: 0;
        color: var(--mobile-portal-muted);
        font-size: 14px;
        line-height: 1.55;
    }

    .mobile-home-search,
    .mobile-tools-search {
        display: flex;
        height: 52px;
        align-items: center;
        margin-top: 20px;
        padding: 0 12px;
        border: 1px solid #e2e7ef;
        border-radius: 15px;
        background: #f7f9fc;
    }

    .mobile-home-search svg,
    .mobile-tools-search svg {
        width: 21px;
        height: 21px;
        flex: none;
        color: #8090a9;
    }

    .mobile-home-search input,
    .mobile-tools-search input {
        min-width: 0;
        width: 100%;
        height: 100%;
        padding: 0 10px;
        border: 0;
        outline: 0;
        background: transparent;
        color: var(--mobile-portal-ink);
        font-size: 15px;
    }

    .mobile-home-search button {
        height: 36px;
        padding: 0 13px;
        border: 0;
        border-radius: 10px;
        background: var(--mobile-portal-blue);
        color: #fff;
        font-size: 13px;
        font-weight: 700;
        white-space: nowrap;
    }

    .mobile-section {
        margin-top: 22px;
    }

    .mobile-section-head {
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin: 0 2px 12px;
    }

    .mobile-section-head h2 {
        margin: 0;
        font-size: 19px;
        font-weight: 790;
    }

    .mobile-section-head a,
    .mobile-section-head span {
        color: var(--mobile-portal-blue);
        font-size: 13px;
        font-weight: 650;
    }

    .mobile-home-tool-grid,
    .mobile-quick-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 10px;
        padding: 16px 10px 14px;
        border: 1px solid var(--mobile-portal-line);
        border-radius: 20px;
        background: #fff;
        box-shadow: var(--mobile-portal-shadow);
    }

    .mobile-home-tool,
    .mobile-quick-tool {
        min-width: 0;
        padding: 2px 0 4px;
        border-radius: 13px;
        text-align: center;
    }

    .mobile-home-tool:active,
    .mobile-quick-tool:active {
        background: #f4f7fb;
    }

    .mobile-tool-icon-lg {
        display: grid;
        width: 45px;
        height: 45px;
        margin: 0 auto 7px;
        place-items: center;
        border-radius: 14px;
        background: #edf4ff;
        color: #2869df;
    }

    .mobile-home-tool:nth-child(4n+2) .mobile-tool-icon-lg,
    .mobile-quick-tool:nth-child(4n+2) .mobile-tool-icon-lg {
        background: #f1edff;
        color: #6c4ed8;
    }

    .mobile-home-tool:nth-child(4n+3) .mobile-tool-icon-lg,
    .mobile-quick-tool:nth-child(4n+3) .mobile-tool-icon-lg {
        background: #e8f8f2;
        color: #07986d;
    }

    .mobile-home-tool:nth-child(4n+4) .mobile-tool-icon-lg,
    .mobile-quick-tool:nth-child(4n+4) .mobile-tool-icon-lg {
        background: #fff0e5;
        color: #d96b1a;
    }

    .mobile-tool-icon-lg svg {
        width: 22px;
        height: 22px;
    }

    .mobile-tool-label {
        display: block;
        overflow: hidden;
        color: var(--mobile-portal-ink);
        font-size: 12.5px;
        font-weight: 650;
        line-height: 1.3;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .mobile-tool-star {
        display: inline-block;
        margin-left: 2px;
        color: #f4a900;
        font-size: 0.9em;
        line-height: 1;
        vertical-align: 0.05em;
    }

    .mobile-category-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0;
        overflow: hidden;
        border: 1px solid var(--mobile-portal-line);
        border-radius: 20px;
        background: #fff;
        box-shadow: var(--mobile-portal-shadow);
    }

    .mobile-category-card {
        position: relative;
        min-height: 126px;
        padding: 17px 15px;
        overflow: hidden;
        border: 0;
        border-radius: 0;
        background: #fff;
        box-shadow: none;
        text-align: left;
    }

    .mobile-category-card:first-child {
        border-right: 1px solid #edf0f4;
    }

    .mobile-category-card.is-full {
        display: flex;
        grid-column: 1 / -1;
        min-height: 98px;
        align-items: center;
        gap: 14px;
        border-top: 1px solid #edf0f4;
    }

    .mobile-category-icon {
        display: grid;
        width: 44px;
        height: 44px;
        margin-bottom: 13px;
        place-items: center;
        border-radius: 14px;
        background: var(--mobile-portal-blue-soft);
        color: var(--mobile-portal-blue);
    }

    .mobile-category-card.is-image .mobile-category-icon {
        background: #f0edff;
        color: #6d4fdb;
    }

    .mobile-category-card.is-audio .mobile-category-icon {
        background: #e8f8f2;
        color: #07986d;
    }

    .mobile-category-card.is-question-bank .mobile-category-icon {
        background: #eeecff;
        color: #5b4bc4;
    }

    .mobile-category-card.is-full .mobile-category-icon {
        flex: none;
        margin: 0;
    }

    .mobile-category-card strong {
        display: block;
        margin-bottom: 5px;
        font-size: 16px;
    }

    .mobile-category-card p {
        margin: 0;
        color: #7b8799;
        font-size: 12px;
        line-height: 1.45;
    }

    .mobile-category-arrow {
        position: absolute;
        top: 13px;
        right: 13px;
        color: #9aa5b6;
    }

    .mobile-category-card.is-full .mobile-category-arrow {
        top: 50%;
        transform: translateY(-50%);
    }

    .mobile-tools-page {
        padding-top: 94px;
    }

    .mobile-tools-title-row {
        display: flex;
        align-items: flex-end;
        justify-content: space-between;
        margin: 2px 0 16px;
    }

    .mobile-tools-title {
        margin: 0;
        font-size: 26px;
        font-weight: 800;
        line-height: 1.2;
    }

    .mobile-tools-count {
        margin-bottom: 3px;
        color: #8993a7;
        font-size: 13px;
    }

    .mobile-tools-search {
        height: 54px;
        margin: 0 0 14px;
        padding: 0 15px;
        border-color: #dfe5ee;
        border-radius: 16px;
        background: #fff;
        box-shadow: 0 4px 14px rgba(22, 37, 63, .045);
    }

    .mobile-tools-clear {
        display: grid;
        width: 26px;
        height: 26px;
        flex: none;
        place-items: center;
        padding: 0;
        border: 0;
        border-radius: 50%;
        background: #edf1f6;
        color: #778399;
    }

    .mobile-quick-card {
        margin-bottom: 16px;
        padding: 17px 16px 15px;
        border: 1px solid var(--mobile-portal-line);
        border-radius: 20px;
        background: #fff;
        box-shadow: var(--mobile-portal-shadow);
    }

    .mobile-quick-card .mobile-quick-grid {
        padding: 0;
        border: 0;
        box-shadow: none;
    }

    .mobile-tools-tabs {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 3px;
        margin-bottom: 16px;
        padding: 4px;
        border-radius: 14px;
        background: #e9edf4;
    }

    .mobile-tools-tab {
        height: 38px;
        padding: 0;
        border: 0;
        border-radius: 11px;
        background: transparent;
        color: #667187;
        font-size: 14px;
        font-weight: 650;
        white-space: nowrap;
    }

    .mobile-tools-tab.is-active {
        background: #fff;
        box-shadow: 0 2px 8px rgba(30, 44, 69, .09);
        color: var(--mobile-portal-ink);
    }

    .mobile-catalog-section {
        margin-top: 18px;
    }

    .mobile-catalog-title {
        display: flex;
        align-items: center;
        gap: 10px;
        margin: 0 2px 10px;
    }

    .mobile-catalog-title-icon {
        display: grid;
        width: 30px;
        height: 30px;
        place-items: center;
        border-radius: 10px;
        background: var(--mobile-portal-blue-soft);
        color: var(--mobile-portal-blue);
    }

    .mobile-catalog-title-icon svg {
        width: 19px;
        height: 19px;
    }

    .mobile-catalog-title h2 {
        margin: 0;
        font-size: 19px;
        font-weight: 780;
    }

    .mobile-tool-group {
        margin-bottom: 12px;
        overflow: hidden;
        border: 1px solid var(--mobile-portal-line);
        border-radius: 18px;
        background: #fff;
    }

    .mobile-tool-group-head {
        display: flex;
        height: 48px;
        align-items: center;
        justify-content: space-between;
        padding: 0 15px;
        border-bottom: 1px solid #f0f2f6;
    }

    .mobile-tool-group-head strong {
        font-size: 15px;
    }

    .mobile-tool-group-head small {
        color: #9aa3b2;
        font-size: 12px;
    }

    .mobile-tool-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        padding: 7px;
    }

    .mobile-tool-row {
        display: flex;
        min-width: 0;
        min-height: 54px;
        align-items: center;
        gap: 9px;
        padding: 8px;
        border-radius: 12px;
    }

    .mobile-tool-row:active {
        background: #f2f6fc;
    }

    .mobile-tool-row-icon {
        display: grid;
        width: 34px;
        height: 34px;
        flex: none;
        place-items: center;
        border-radius: 10px;
        background: #edf4ff;
        color: #2869df;
    }

    .mobile-tool-row:nth-child(4n+2) .mobile-tool-row-icon { background: #f0edff; color: #6f50dc; }
    .mobile-tool-row:nth-child(4n+3) .mobile-tool-row-icon { background: #e9f8f3; color: #0c9d73; }
    .mobile-tool-row:nth-child(4n+4) .mobile-tool-row-icon { background: #fff1e7; color: #d96c1d; }

    .mobile-tool-row-icon svg {
        width: 19px;
        height: 19px;
    }

    .mobile-tool-row-name {
        overflow-wrap: anywhere;
        font-size: 14px;
        font-weight: 620;
        line-height: 1.25;
    }

    .mobile-tool-more {
        width: calc(100% - 18px);
        height: 38px;
        margin: 0 9px 7px;
        border: 0;
        border-radius: 11px;
        background: #f7f9fc;
        color: #637087;
        font-size: 13px;
    }

    .mobile-tools-empty {
        padding: 42px 20px;
        border: 1px solid var(--mobile-portal-line);
        border-radius: 18px;
        background: #fff;
        color: #7b8699;
        text-align: center;
    }

    .mobile-tools-empty strong {
        display: block;
        margin: 9px 0 5px;
        color: var(--mobile-portal-ink);
    }

    .mobile-scan-intro,
    .mobile-mine-intro {
        margin: 1px 2px 17px;
    }

    .mobile-scan-shell {
        display: block !important;
        min-height: 100vh !important;
        padding: 0 !important;
        background: var(--mobile-portal-bg) !important;
    }

    .mobile-scan-stage {
        padding: 18px;
        border: 1px solid var(--mobile-portal-line);
        border-radius: 22px;
        background: #fff;
        box-shadow: var(--mobile-portal-shadow);
    }

    .mobile-scan-preview {
        position: relative;
        display: flex;
        height: 232px;
        align-items: center;
        justify-content: center;
        overflow: hidden;
        border-radius: 17px;
        background: linear-gradient(145deg, #eaf2ff, #f6f9ff);
    }

    .mobile-scan-preview::before {
        position: absolute;
        inset: 23px;
        border: 2px solid rgba(47, 114, 244, .34);
        border-radius: 15px;
        content: "";
    }

    .mobile-scan-preview::after {
        position: absolute;
        top: 50%;
        right: 34px;
        left: 34px;
        height: 2px;
        background: linear-gradient(90deg, transparent, #2f72f4, transparent);
        box-shadow: 0 0 13px rgba(47, 114, 244, .7);
        content: "";
    }

    .mobile-scan-document {
        width: 122px;
        height: 156px;
        padding: 21px 16px;
        transform: rotate(-3deg);
        border-radius: 9px;
        background: #fff;
        box-shadow: 0 13px 28px rgba(44, 70, 115, .15);
    }

    .mobile-scan-line {
        height: 7px;
        margin-bottom: 11px;
        border-radius: 9px;
        background: #dce6f5;
    }

    .mobile-scan-line.is-short { width: 62%; }

    .mobile-scan-caption {
        margin: 14px 0 15px;
        text-align: center;
    }

    .mobile-scan-caption strong { display: block; margin-bottom: 4px; font-size: 17px; }
    .mobile-scan-caption span { color: #7d8799; font-size: 13px; }

    .mobile-scan-actions {
        display: grid;
        grid-template-columns: 1.45fr 1fr;
        gap: 10px;
    }

    .mobile-scan-action {
        display: flex;
        height: 50px;
        align-items: center;
        justify-content: center;
        gap: 8px;
        border-radius: 14px;
        font-weight: 720;
        cursor: pointer;
    }

    .mobile-scan-action.is-primary {
        border: 1px solid var(--mobile-portal-blue);
        background: var(--mobile-portal-blue);
        box-shadow: 0 7px 14px rgba(47, 114, 244, .2);
        color: #fff;
    }

    .mobile-scan-action.is-secondary {
        border: 1px solid #dbe2ec;
        background: #fff;
        color: #263550;
    }

    .mobile-scan-action svg { width: 20px; height: 20px; }

    .mobile-scan-file {
        position: absolute;
        width: 1px;
        height: 1px;
        opacity: 0;
        pointer-events: none;
    }

    .mobile-scan-features {
        margin-top: 18px;
        padding-top: 17px;
        border-top: 1px solid #edf0f5;
    }

    .mobile-scan-features h2 {
        margin: 0 1px 12px;
        font-size: 16px;
    }

    .mobile-scan-feature-grid {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 9px;
    }

    .mobile-scan-feature {
        display: flex;
        min-width: 0;
        height: 91px;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 8px;
        border: 1px solid #e1e6ee;
        border-radius: 15px;
        background: #fff;
        color: #2a3850;
        font-size: 12.5px;
        font-weight: 680;
        text-align: center;
    }

    .mobile-scan-feature-icon {
        display: grid;
        width: 39px;
        height: 39px;
        place-items: center;
        border-radius: 12px;
        background: #edf4ff;
        color: #2f72f4;
    }

    .mobile-scan-feature:nth-child(1) .mobile-scan-feature-icon { background: #ffecef; color: #d84b61; }
    .mobile-scan-feature:nth-child(3) .mobile-scan-feature-icon { background: #f1edff; color: #7051d4; }
    .mobile-scan-feature:nth-child(4) .mobile-scan-feature-icon { background: #fff0e8; color: #d86b2b; }
    .mobile-scan-feature:nth-child(5) .mobile-scan-feature-icon { background: #eaf8f3; color: #15936d; }
    .mobile-scan-feature:nth-child(6) .mobile-scan-feature-icon { background: #fff5dc; color: #b77a00; }
    .mobile-scan-feature-icon svg { width: 23px; height: 23px; }

    .mobile-profile-card {
        position: relative;
        overflow: hidden;
        padding: 19px;
        border-radius: 22px;
        background: linear-gradient(145deg, #15233e, #275db7);
        box-shadow: 0 13px 29px rgba(30, 67, 130, .2);
        color: #fff;
    }

    .mobile-profile-card::after {
        position: absolute;
        top: -60px;
        right: -48px;
        width: 130px;
        height: 130px;
        border-radius: 50%;
        background: rgba(255, 255, 255, .08);
        content: "";
    }

    .mobile-profile-top {
        position: relative;
        display: flex;
        align-items: center;
        gap: 13px;
    }

    .mobile-profile-avatar {
        display: grid;
        width: 55px;
        height: 55px;
        place-items: center;
        border-radius: 18px;
        background: #fff;
        box-shadow: 0 6px 14px rgba(7, 22, 52, .2);
        font-size: 25px;
    }

    .mobile-profile-copy { min-width: 0; flex: 1; }
    .mobile-profile-copy strong { display: block; margin-bottom: 4px; font-size: 18px; }
    .mobile-profile-copy span { color: rgba(255, 255, 255, .7); font-size: 12px; }

    .mobile-profile-button {
        position: relative;
        display: flex;
        width: 100%;
        height: 43px;
        align-items: center;
        justify-content: center;
        margin-top: 17px;
        border: 1px solid rgba(255, 255, 255, .24);
        border-radius: 13px;
        background: rgba(255, 255, 255, .13);
        color: #fff;
        font-weight: 700;
    }

    .mobile-mine-shortcuts {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
        margin-top: 15px;
    }

    .mobile-mine-shortcut {
        display: flex;
        height: 86px;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 7px;
        border: 1px solid var(--mobile-portal-line);
        border-radius: 17px;
        background: #fff;
        box-shadow: 0 4px 14px rgba(20, 31, 55, .04);
        font-size: 13px;
        font-weight: 650;
    }

    .mobile-mine-shortcut svg { width: 24px; height: 24px; color: var(--mobile-portal-blue); }

    .mobile-mine-section { margin-top: 21px; }
    .mobile-mine-section h2 { margin: 0 2px 10px; font-size: 17px; }

    .mobile-mine-menu {
        overflow: hidden;
        border: 1px solid var(--mobile-portal-line);
        border-radius: 18px;
        background: #fff;
    }

    .mobile-mine-row {
        display: flex;
        width: 100%;
        min-height: 58px;
        align-items: center;
        gap: 12px;
        padding: 0 15px;
        border-bottom: 1px solid #f0f2f6;
        background: #fff;
        text-align: left;
    }

    .mobile-mine-row:last-child { border-bottom: 0; }

    .mobile-mine-row-icon {
        display: grid;
        width: 36px;
        height: 36px;
        flex: none;
        place-items: center;
        border-radius: 11px;
        background: #eef4ff;
        color: #2b6ee8;
    }

    .mobile-mine-row:nth-child(2) .mobile-mine-row-icon { background: #f1edff; color: #6c4ed8; }
    .mobile-mine-row:nth-child(3) .mobile-mine-row-icon { background: #e8f8f2; color: #07986d; }
    .mobile-mine-row:nth-child(4) .mobile-mine-row-icon { background: #fff0e5; color: #d96b1a; }
    .mobile-mine-row-icon svg { width: 19px; height: 19px; }

    .mobile-mine-row-copy { min-width: 0; flex: 1; }
    .mobile-mine-row-copy strong { display: block; margin-bottom: 2px; font-size: 14px; }
    .mobile-mine-row-copy span { display: block; overflow: hidden; color: #919bab; font-size: 11.5px; text-overflow: ellipsis; white-space: nowrap; }
    .mobile-mine-chevron { color: #abb4c2; }
    .mobile-mine-footer { margin: 22px 0 4px; color: #a0a9b7; font-size: 11px; text-align: center; }
}

@media (max-width: 370px) {
    :root { --mobile-portal-gutter: 14px; }
    .mobile-home-tool-grid,
    .mobile-quick-grid { gap: 5px; }
    .mobile-tool-label { font-size: 11.5px; }
    .mobile-tool-grid { grid-template-columns: 1fr; }
    .mobile-scan-actions { grid-template-columns: 1fr; }
}