:root {
        --expert-blue: #0a66c2;
        --expert-blue-dark: #004182;
        --expert-blue-ink: #14344f;
        --expert-blue-soft: #eef6ff;
        --expert-bg: #f3f7fb;
        --expert-card: #ffffff;
        --expert-line: #d7e2ec;
        --expert-muted: #5e6f80;
        --expert-green: #0a7f4f;
        --expert-amber: #9a5b00;
        --expert-red: #9f1725;
    }

    *,
    *::before,
    *::after {
        box-sizing: border-box;
    }

    html {
        min-height: 100%;
        background: var(--expert-bg);
    }

    body {
        min-height: 100%;
        margin: 0;
        background: var(--expert-bg);
        color: var(--expert-blue-ink);
        font-family: "Aptos", "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
        -webkit-font-smoothing: antialiased;
        text-rendering: optimizeLegibility;
    }

    a {
        color: var(--expert-blue);
    }

    button,
    input,
    select,
    textarea {
        font-family: inherit;
    }

    .expert-shell {
        min-height: 100vh;
        padding: 0 0 64px;
        color: var(--expert-blue-ink);
        background:
            linear-gradient(180deg, rgba(10, 102, 194, 0.12), rgba(243, 247, 251, 0) 340px),
            var(--expert-bg);
    }

    .expert-wrap {
        width: min(1180px, calc(100% - 32px));
        margin: 0 auto;
    }

    .expert-topbar {
        position: sticky;
        top: 0;
        z-index: 5;
        background: rgba(255, 255, 255, 0.94);
        border-bottom: 1px solid var(--expert-line);
        backdrop-filter: blur(14px);
    }

    .expert-topbar-inner {
        width: min(1180px, calc(100% - 32px));
        min-height: 64px;
        margin: 0 auto;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 18px;
    }

    .expert-brand {
        display: flex;
        align-items: center;
        gap: 10px;
        color: var(--expert-blue-dark);
        font-weight: 800;
        text-decoration: none;
    }

    .expert-brand-mark {
        width: 34px;
        height: 34px;
        display: grid;
        place-items: center;
        border-radius: 7px;
        background: var(--expert-blue);
        color: #fff;
        font-size: 1.18rem;
        letter-spacing: 0;
    }

    .expert-brand strong {
        display: block;
        color: #102b45;
        line-height: 1.05;
    }

    .expert-brand small {
        display: block;
        margin-top: 2px;
        color: var(--expert-muted);
        font-size: 0.76rem;
        font-weight: 700;
    }

    .expert-nav {
        display: flex;
        align-items: center;
        gap: 10px;
    }

    .expert-nav a,
    .expert-nav button,
    .expert-action,
    .expert-action-light {
        min-height: 40px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 7px;
        padding: 0 16px;
        border: 1px solid transparent;
        border-radius: 999px;
        font: inherit;
        font-weight: 800;
        text-decoration: none;
        cursor: pointer;
    }

    .expert-action {
        background: var(--expert-blue);
        color: #fff;
        box-shadow: 0 10px 24px rgba(10, 102, 194, 0.18);
    }

    .expert-action:hover,
    .expert-action:focus {
        background: var(--expert-blue-dark);
        color: #fff;
    }

    .expert-action-light,
    .expert-nav a,
    .expert-nav button {
        background: #fff;
        border-color: var(--expert-line);
        color: var(--expert-blue-dark);
    }

    .expert-action-light:hover,
    .expert-action-light:focus,
    .expert-nav a:hover,
    .expert-nav button:hover,
    .expert-nav a:focus,
    .expert-nav button:focus {
        border-color: rgba(10, 102, 194, 0.35);
        background: var(--expert-blue-soft);
        color: var(--expert-blue-dark);
    }


    .lang-switch {
        display: inline-flex;
        align-items: center;
        gap: 0;
        margin-left: 14px;
        border: 1px solid var(--expert-line);
        border-radius: 999px;
        background: #fff;
        padding: 0;
        overflow: hidden;
    }
    .lang-switch form {
        display: inline;
    }
    .lang-btn {
        min-height: 36px;
        padding: 0 14px;
        border: none;
        border-radius: 0;
        font-size: 0.82rem;
        font-weight: 800;
        color: var(--expert-blue-dark);
        background: transparent;
        text-decoration: none;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
    }
    .lang-btn + .lang-btn {
        border-left: 1px solid var(--expert-line);
    }
    .lang-btn.active,
    .lang-btn:hover {
        background: var(--expert-blue);
        color: #fff;
    }

    .expert-hero {
        padding: 42px 0 26px;
    }

    .expert-hero-grid {
        display: grid;
        grid-template-columns: minmax(0, 1.3fr) minmax(310px, 0.7fr);
        gap: 22px;
        align-items: stretch;
    }

    .expert-hero-main,
    .expert-panel,
    .expert-card,
    .expert-sidebar,
    .expert-form-card {
        border: 1px solid var(--expert-line);
        background: var(--expert-card);
        box-shadow: 0 18px 44px rgba(20, 52, 79, 0.08);
    }

    .expert-hero-main {
        padding: clamp(28px, 4vw, 46px);
        border-radius: 8px;
    }

    .expert-kicker {
        margin: 0 0 10px;
        color: var(--expert-blue);
        font-size: 0.8rem;
        font-weight: 900;
        letter-spacing: 0.08em;
        text-transform: uppercase;
    }

    .expert-hero h1,
    .expert-panel h1 {
        max-width: 780px;
        margin: 0;
        color: #102b45;
        font-size: 2.65rem;
        line-height: 1.14;
        letter-spacing: 0;
    }

    .expert-hero-copy,
    .expert-panel-copy {
        max-width: 740px;
        margin: 16px 0 0;
        color: var(--expert-muted);
        font-size: 1.08rem;
        line-height: 1.75;
    }

    .expert-search-box {
        margin-top: 26px;
        display: grid;
        grid-template-columns: minmax(0, 1fr) auto;
        gap: 10px;
    }

    .expert-advanced-search {
        grid-template-columns: 1fr;
        gap: 14px;
        padding: 16px;
        border: 1px solid rgba(10, 102, 194, 0.14);
        border-radius: 10px;
        background: #f8fbfe;
    }

    .expert-search-main,
    .expert-search-grid > div {
        display: grid;
        gap: 7px;
    }

    .expert-search-main label,
    .expert-search-grid label {
        color: #102b45;
        font-size: 0.86rem;
        font-weight: 900;
    }

    .expert-search-grid {
        display: grid;
        grid-template-columns: repeat(4, minmax(0, 1fr));
        gap: 12px;
    }

    .expert-search-actions {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
    }

    .expert-search-box input,
    .expert-search-box select,
    .expert-input,
    .expert-field input,
    .expert-field select,
    .expert-field textarea {
        width: 100%;
        min-height: 46px;
        border: 1px solid var(--expert-line);
        border-radius: 6px;
        padding: 11px 13px;
        background: #fff;
        color: var(--expert-blue-ink);
        font: inherit;
    }

    .expert-active-filters {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
        margin-top: 14px;
    }

    .expert-active-filters span {
        display: inline-flex;
        align-items: center;
        min-height: 28px;
        padding: 4px 10px;
        border-radius: 999px;
        background: #eef6ff;
        color: var(--expert-blue-dark);
        font-size: 0.85rem;
        font-weight: 800;
    }

    .expert-field textarea {
        min-height: 116px;
    }

    .expert-stat-panel {
        padding: 22px;
        border-radius: 8px;
        background:
            linear-gradient(150deg, rgba(10, 102, 194, 0.12), rgba(255, 255, 255, 0) 60%),
            #fff;
    }

    .expert-stat-grid {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 12px;
        margin-top: 18px;
    }

    .expert-stat {
        padding: 14px;
        border: 1px solid var(--expert-line);
        border-radius: 7px;
        background: rgba(255, 255, 255, 0.78);
    }

    .expert-stat strong {
        display: block;
        color: var(--expert-blue-dark);
        font-size: 1.7rem;
        line-height: 1.1;
    }

    .expert-stat span,
    .expert-muted,
    .expert-meta,
    .expert-empty,
    .expert-schedule-note,
    .expert-field .helptext {
        color: var(--expert-muted);
    }

    .expert-feature-grid {
        display: grid;
        grid-template-columns: repeat(4, minmax(0, 1fr));
        gap: 12px;
    }

    .expert-feature-grid > div,
    .expert-missing-list li {
        padding: 14px;
        border: 1px solid var(--expert-line);
        border-radius: 7px;
        background: #f8fbfe;
    }

    .expert-feature-grid strong {
        color: var(--expert-blue-dark);
    }

    .expert-missing-list {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 8px;
        margin: 12px 0 0;
        padding: 0;
        list-style: none;
    }

    .expert-actions,
    .expert-card-actions {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        align-items: center;
    }

    .expert-actions {
        margin-top: 22px;
    }

    .expert-layout {
        display: grid;
        grid-template-columns: 1fr;
        gap: 16px;
        align-items: start;
    }

    .expert-results {
        display: grid;
        gap: 14px;
    }

    .expert-card {
        border-radius: 8px;
        padding: 20px;
    }

    .expert-profile-card {
        display: grid;
        grid-template-columns: 88px minmax(0, 1fr) auto;
        gap: 16px;
        align-items: start;
    }

    .expert-avatar,
    .expert-avatar-placeholder {
        width: 88px;
        height: 88px;
        border-radius: 50%;
        object-fit: cover;
        background: linear-gradient(135deg, #dcecff, #f8fbff);
        border: 2px solid #fff;
        box-shadow: 0 0 0 1px var(--expert-line);
    }

    .expert-avatar-placeholder {
        display: grid;
        place-items: center;
        color: var(--expert-blue);
        font-size: 1.8rem;
        font-weight: 900;
    }

    .expert-card h2,
    .expert-card h3,
    .expert-sidebar h2,
    .expert-panel h2 {
        margin: 0;
        color: #102b45;
    }

    .expert-card h2 a {
        color: #102b45;
        text-decoration: none;
    }

    .expert-card h2 a:hover,
    .expert-card h2 a:focus {
        color: var(--expert-blue);
        text-decoration: underline;
    }

    .expert-tagline {
        margin: 8px 0 0;
        color: #2d465d;
        line-height: 1.65;
    }

    .expert-skill {
        margin: 10px 0 0;
        color: var(--expert-muted);
        line-height: 1.65;
    }

    .expert-badge-row {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
        margin-top: 12px;
    }

    .expert-badge,
    .expert-status,
    .expert-filter-pill,
    .expert-trust-badge {
        display: inline-flex;
        align-items: center;
        min-height: 28px;
        padding: 4px 10px;
        border-radius: 999px;
        border: 1px solid rgba(10, 102, 194, 0.18);
        background: var(--expert-blue-soft);
        color: var(--expert-blue-dark);
        font-size: 0.85rem;
        font-weight: 800;
    }

    .expert-filter-pill {
        text-decoration: none;
    }

    .expert-trust-row {
        margin-top: 8px;
    }

    .expert-trust-badge {
        border-color: rgba(10, 102, 194, 0.34);
        background: #0a66c2;
        color: #fff;
    }

    .expert-trust-badge.is-featured {
        border-color: rgba(154, 91, 0, 0.28);
        background: #fff7e8;
        color: var(--expert-amber);
    }

    .expert-trust-card {
        background:
            linear-gradient(135deg, rgba(10, 102, 194, 0.08), rgba(255, 255, 255, 0) 55%),
            #fff;
    }

    .expert-trust-grid {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 10px;
        margin: 14px 0;
    }

    .expert-trust-grid div {
        padding: 13px;
        border: 1px solid var(--expert-line);
        border-radius: 7px;
        background: #f8fbfe;
    }

    .expert-trust-grid strong,
    .expert-trust-grid span {
        display: block;
    }

    .expert-trust-grid strong {
        color: var(--expert-blue-dark);
        font-size: 1.08rem;
    }

    .expert-trust-grid span {
        margin-top: 4px;
        color: var(--expert-muted);
        font-size: 0.86rem;
    }

    .expert-filter-pill:hover,
    .expert-filter-pill:focus,
    .expert-filter-pill.is-active {
        border-color: rgba(10, 102, 194, 0.45);
        background: var(--expert-blue);
        color: #fff;
    }

    .expert-filter-stack {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
        margin: 14px 0 18px;
    }

    .status-available {
        border-color: rgba(10, 127, 79, 0.22);
        background: #eaf7f1;
        color: var(--expert-green);
    }

    .status-busy {
        border-color: rgba(159, 23, 37, 0.22);
        background: #fff0f2;
        color: var(--expert-red);
    }

    .status-tentative {
        border-color: rgba(154, 91, 0, 0.22);
        background: #fff7e8;
        color: var(--expert-amber);
    }

    .expert-sidebar {
        border-radius: 8px;
        padding: 22px;
    }

    .expert-sidebar + .expert-sidebar {
        margin-top: 16px;
    }

    .expert-bottom-grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: 16px;
        align-items: start;
    }

    .expert-bottom-grid .expert-sidebar {
        width: 100%;
        box-sizing: border-box;
    }

    .expert-bottom-grid .expert-sidebar + .expert-sidebar {
        margin-top: 0;
    }

    .expert-sidebar h3 {
        margin: 18px 0 10px;
        color: #102b45;
        font-size: 1rem;
    }

    .expert-sidebar-list {
        display: grid;
        gap: 12px;
        margin: 16px 0 0;
        padding: 0;
        list-style: none;
    }

    .expert-sidebar-list li {
        padding: 12px;
        border: 1px solid var(--expert-line);
        border-radius: 7px;
        background: #f8fbfe;
    }

    .expert-panel {
        padding: clamp(24px, 4vw, 38px);
        border-radius: 8px;
        margin: 42px 0 22px;
    }

    .expert-detail-grid {
        display: grid;
        grid-template-columns: minmax(0, 1fr) 340px;
        gap: 22px;
        align-items: start;
    }

    .expert-section {
        margin-bottom: 16px;
    }

    .expert-section h2 {
        margin: 0 0 14px;
    }

    .expert-form-card {
        max-width: 960px;
        padding: 26px;
        border-radius: 8px;
    }

    .expert-form-grid {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 16px;
    }

    .expert-field-full,
    .expert-form-grid .full-width {
        grid-column: 1 / -1;
    }

    .expert-field label {
        display: block;
        margin-bottom: 7px;
        color: #102b45;
        font-weight: 800;
    }

    .expert-errors {
        margin-top: 6px;
        color: var(--expert-red);
        font-size: 0.94rem;
    }

    .expert-messages {
        width: min(1180px, calc(100% - 32px));
        margin: 18px auto 0;
    }

    .expert-messages p {
        margin: 0 0 10px;
        padding: 12px 14px;
        border: 1px solid rgba(10, 102, 194, 0.18);
        border-radius: 7px;
        background: #fff;
        color: var(--expert-blue-dark);
    }

    .expert-schedule-list {
        display: grid;
        gap: 10px;
        margin: 0;
        padding: 0;
        list-style: none;
    }

    .expert-schedule-item {
        display: grid;
        grid-template-columns: minmax(0, 1fr) auto;
        gap: 12px;
        align-items: center;
        padding: 13px;
        border: 1px solid var(--expert-line);
        border-radius: 7px;
        background: #f8fbfe;
    }

    .expert-resume-list {
        display: grid;
        gap: 14px;
        margin: 0;
        padding: 0;
        list-style: none;
    }

    .expert-resume-item {
        display: grid;
        grid-template-columns: minmax(0, 1fr) auto;
        gap: 10px 14px;
        padding: 16px;
        border: 1px solid var(--expert-line);
        border-radius: 7px;
        background: #f8fbfe;
    }

    .expert-resume-detail {
        grid-column: 1 / -1;
        margin: 0;
        padding-left: 18px;
        color: var(--expert-muted);
        line-height: 1.7;
    }

    p.expert-resume-detail {
        padding-left: 0;
    }

    .expert-progress {
        height: 12px;
        margin: 12px 0;
        overflow: hidden;
        border-radius: 999px;
        background: #dbe8f5;
    }

    .expert-progress span {
        display: block;
        height: 100%;
        border-radius: inherit;
        background: linear-gradient(90deg, var(--expert-blue), #28a4ff);
    }

    .expert-feature-grid,
    .expert-topic-grid,
    .expert-compare-grid {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 14px;
    }

    .expert-topic-card,
    .expert-feature-grid > div,
    .expert-compare-card {
        padding: 16px;
        border: 1px solid var(--expert-line);
        border-radius: 8px;
        background: #f8fbfe;
    }

    .expert-topic-card a {
        color: #102b45;
        text-decoration: none;
    }

    .expert-topic-card a:hover,
    .expert-topic-card a:focus {
        color: var(--expert-blue);
        text-decoration: underline;
    }

    .expert-compare-table {
        width: 100%;
        border-collapse: collapse;
    }

    .expert-compare-table th,
    .expert-compare-table td {
        padding: 10px 12px;
        border: 1px solid var(--expert-line);
        vertical-align: top;
        text-align: left;
    }

    .expert-compare-table th {
        background: #f8fbfe;
        color: #102b45;
    }

    .expert-login-grid {
        display: grid;
        grid-template-columns: minmax(0, 0.82fr) minmax(300px, 0.5fr);
        gap: 22px;
        align-items: start;
    }

    .expert-mini-profile {
        display: flex;
        align-items: center;
        gap: 14px;
    }

    @media (max-width: 980px) {
        .expert-feature-grid,
        .expert-missing-list {
            grid-template-columns: 1fr;
        }

        .expert-hero h1,
        .expert-panel h1 {
            font-size: 2.35rem;
        }

        .expert-hero-grid,
        .expert-layout,
        .expert-bottom-grid,
        .expert-detail-grid,
        .expert-login-grid,
        .expert-search-grid,
        .expert-topic-grid,
        .expert-compare-grid,
        .expert-feature-grid {
            grid-template-columns: 1fr;
        }

        .expert-profile-card {
            grid-template-columns: 78px minmax(0, 1fr);
        }

        .expert-profile-card .expert-card-actions {
            grid-column: 1 / -1;
        }
    }

    @media (max-width: 680px) {
        .expert-hero h1,
        .expert-panel h1 {
            font-size: 2rem;
        }

        .expert-topbar-inner {
            min-height: auto;
            padding: 12px 0;
            align-items: flex-start;
            flex-direction: column;
        }

        .expert-nav {
            width: 100%;
            overflow-x: auto;
            padding-bottom: 2px;
        }

    
    .lang-switch {
        display: inline-flex;
        align-items: center;
        gap: 0;
        margin-left: 14px;
        border: 1px solid var(--expert-line);
        border-radius: 999px;
        background: #fff;
        padding: 0;
        overflow: hidden;
    }
    .lang-switch form {
        display: inline;
    }
    .lang-btn {
        min-height: 36px;
        padding: 0 14px;
        border: none;
        border-radius: 0;
        font-size: 0.82rem;
        font-weight: 800;
        color: var(--expert-blue-dark);
        background: transparent;
        text-decoration: none;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
    }
    .lang-btn + .lang-btn {
        border-left: 1px solid var(--expert-line);
    }
    .lang-btn.active,
    .lang-btn:hover {
        background: var(--expert-blue);
        color: #fff;
    }

    .expert-hero {
            padding-top: 24px;
        }

        .expert-search-box,
        .expert-form-grid,
        .expert-resume-item,
        .expert-schedule-item {
            grid-template-columns: 1fr;
        }

        .expert-stat-grid {
            grid-template-columns: 1fr 1fr;
        }

        .expert-trust-grid {
            grid-template-columns: 1fr;
        }

        .expert-profile-card {
            grid-template-columns: 1fr;
        }

        .expert-avatar,
        .expert-avatar-placeholder {
            width: 76px;
            height: 76px;
        }
    }