:root {
    --kb-primary: #1a56a7;
    --kb-primary-soft: #eaf2ff;
    --kb-bg: #f5f7fa;
    --kb-card: #ffffff;
    --kb-border: #e8eaed;
    --kb-text: #1f2937;
    --kb-subtext: #6b7280;
    --kb-shadow: 0 6px 24px rgba(26, 86, 167, 0.08);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
    background: linear-gradient(180deg, #f3f7ff 0%, var(--kb-bg) 260px);
    color: var(--kb-text);
}

.kb-reports-topbar {
    height: 56px;
    background: #f7f8fa;
    border-bottom: 1px solid #e5e7eb;
    display: flex;
    align-items: center;
}

.kb-reports-topbar-inner {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.brand-link,
.back-link {
    text-decoration: none;
    color: #374151;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
}

.brand-link {
    min-width: 0;
}

.brand-link span {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.back-link {
    font-size: 14px;
    color: var(--kb-primary);
    flex-shrink: 0;
}

.kb-reports-page {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px 24px 40px;
}

.hero-card {
    background: linear-gradient(135deg, #0f3670 0%, #1a56a7 40%, #1e74d8 100%);
    border-radius: 16px;
    color: #fff;
    padding: 24px;
    display: flex;
    justify-content: space-between;
    gap: 16px;
    box-shadow: var(--kb-shadow);
}

.hero-title-wrap h1 {
    margin: 0 0 8px;
    font-size: 30px;
    letter-spacing: .4px;
}

.hero-title-wrap p {
    margin: 0;
    opacity: .9;
}

.hero-desc {
    margin-bottom: 10px !important;
}

.hero-endpoint {
    display: inline-block;
    padding: 6px 10px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, .32);
    background: rgba(255, 255, 255, .15);
    font-size: 13px;
    letter-spacing: .2px;
}

.hero-meta {
    display: flex;
    flex-direction: column;
    gap: 10px;
    align-items: flex-end;
    justify-content: center;
}

.meta-pill {
    padding: 6px 12px;
    border: 1px solid rgba(255, 255, 255, .2);
    border-radius: 999px;
    font-size: 13px;
    background: rgba(255, 255, 255, .16);
}

.meta-pill.subtle {
    opacity: .85;
}

.query-panel {
    margin-top: 16px;
    background: var(--kb-card);
    border: 1px solid var(--kb-border);
    border-radius: 14px;
    padding: 18px;
    box-shadow: var(--kb-shadow);
}

.query-row label,
.query-grid label {
    display: block;
    font-size: 13px;
    color: var(--kb-subtext);
    margin-bottom: 8px;
}

.query-input-group {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 10px;
}

.filter-drawer-toggle {
    display: none;
    width: 100%;
    margin-top: 12px;
    border: 1px solid var(--kb-border);
    border-radius: 10px;
    background: #f8fbff;
    color: var(--kb-primary);
    font-weight: 600;
    font-size: 14px;
    padding: 11px 12px;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
}

.filter-drawer-toggle .drawer-arrow {
    transition: transform .2s ease;
}

.filter-drawer-toggle[aria-expanded="true"] .drawer-arrow {
    transform: rotate(180deg);
}

.advanced-filter-panel {
    margin-top: 14px;
}

input {
    width: 100%;
    border: 1px solid var(--kb-border);
    border-radius: 10px;
    padding: 10px 12px;
    font-size: 14px;
    color: var(--kb-text);
    background: #fff;
}

input:focus {
    outline: none;
    border-color: #85b4ff;
    box-shadow: 0 0 0 3px rgba(26, 86, 167, .12);
}

.btn-main,
.btn-subtle {
    border: none;
    border-radius: 10px;
    padding: 10px 14px;
    cursor: pointer;
    font-weight: 600;
    font-size: 14px;
    min-height: 42px;
}

.btn-main {
    color: #fff;
    background: linear-gradient(135deg, #1a56a7 0%, #0f3670 100%);
}

.btn-main:hover {
    transform: translateY(-1px);
}

.btn-subtle {
    background: var(--kb-primary-soft);
    color: var(--kb-primary);
}

.query-grid {
    display: grid;
    grid-template-columns: repeat(6, minmax(120px, 1fr));
    gap: 10px;
}

.query-actions {
    margin-top: 12px;
    display: flex;
    gap: 8px;
    justify-content: flex-end;
}

.result-panel {
    margin-top: 16px;
}

.state-block {
    background: var(--kb-card);
    border: 1px dashed var(--kb-border);
    border-radius: 14px;
    padding: 44px 18px;
    text-align: center;
    color: var(--kb-subtext);
}

.state-block i {
    font-size: 26px;
    color: #9ca3af;
    margin-bottom: 10px;
}

.empty-tip {
    margin-top: 10px;
    color: #94a3b8;
    font-size: 12px;
    word-break: break-all;
}

.state-block.error {
    border-style: solid;
    border-color: #fecaca;
    color: #b91c1c;
    background: #fef2f2;
}

.hidden {
    display: none;
}

.result-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: 12px;
    align-items: start;
}

.report-card {
    background: var(--kb-card);
    border: 1px solid var(--kb-border);
    border-radius: 14px;
    padding: 14px;
    box-shadow: var(--kb-shadow);
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.report-card:hover {
    border-color: #c5dafd;
}

.report-title {
    margin: 0;
    font-size: 16px;
    line-height: 1.45;
    color: #0f2f5c;
}

.report-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    font-size: 12px;
    color: var(--kb-subtext);
}

.chip {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 12px;
    padding: 3px 8px;
    border-radius: 999px;
    background: var(--kb-primary-soft);
    color: var(--kb-primary);
}

.chip-group {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.report-text {
    font-size: 13px;
    line-height: 1.7;
    color: #1f2937;
    max-height: 140px;
    overflow: hidden;
    position: relative;
    white-space: pre-wrap;
}

.report-text.expanded {
    max-height: none;
}

.report-text:not(.expanded)::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 40px;
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0), #fff 85%);
}

.expand-btn {
    align-self: flex-start;
    border: none;
    background: transparent;
    color: var(--kb-primary);
    font-size: 13px;
    cursor: pointer;
    padding: 0;
}

mark {
    background: #fff4b3;
    padding: 1px 3px;
    border-radius: 4px;
}

@media (max-width: 992px) {
    .query-grid {
        grid-template-columns: repeat(3, minmax(120px, 1fr));
    }
}

@media (max-width: 768px) {
    .kb-reports-topbar-inner,
    .kb-reports-page {
        padding-left: 10px;
        padding-right: 10px;
    }

    .hero-card {
        flex-direction: column;
    }

    .hero-meta {
        align-items: flex-start;
    }

    .hero-title-wrap h1 {
        font-size: 24px;
    }

    .hero-endpoint {
        display: block;
        border-radius: 10px;
        font-size: 12px;
        line-height: 1.5;
        white-space: normal;
        word-break: break-all;
    }

    .query-input-group {
        grid-template-columns: 1fr;
    }

    .query-input-group .btn-main {
        width: 100%;
    }

    .query-grid {
        grid-template-columns: repeat(2, minmax(120px, 1fr));
    }

    .query-actions {
        justify-content: stretch;
    }

    .query-actions .btn-subtle {
        flex: 1;
    }

    .result-list {
        grid-template-columns: 1fr;
    }

    .report-card {
        padding: 12px;
    }

    .report-title {
        font-size: 15px;
        line-height: 1.5;
    }

    .report-text {
        font-size: 14px;
        line-height: 1.75;
        max-height: 180px;
    }

    .expand-btn {
        min-height: 36px;
        padding: 2px 0;
        font-size: 14px;
    }
}

@media (max-width: 520px) {
    .kb-reports-topbar {
        height: auto;
        min-height: 56px;
    }

    .kb-reports-topbar-inner {
        padding-top: 8px;
        padding-bottom: 8px;
        flex-wrap: wrap;
        align-items: flex-start;
    }

    .brand-link {
        width: 100%;
    }

    .back-link {
        margin-left: 34px;
        font-size: 13px;
    }

    .query-grid {
        grid-template-columns: 1fr;
    }

    .filter-drawer-toggle {
        display: inline-flex;
    }

    .advanced-filter-panel {
        margin-top: 10px;
        max-height: 0;
        opacity: 0;
        overflow: hidden;
        transform: translateY(-4px);
        transition: max-height .25s ease, opacity .2s ease, transform .2s ease;
    }

    .advanced-filter-panel.is-open {
        max-height: 900px;
        opacity: 1;
        transform: translateY(0);
    }

    .query-actions {
        margin-top: 10px;
    }
}