:root {
  color-scheme: light;
  --color-primary: #2968ee;
  --color-primary-active: #1c51c7;
  --color-primary-soft: #edf3ff;
  --color-primary-border: #d4e1ff;
  --color-canvas: #ffffff;
  --color-surface-soft: #f3f6fb;
  --color-surface-strong: #eaf0f9;
  --color-hairline: #e1e7f0;
  --color-ink: #1e293b;
  --color-body: #536176;
  --color-muted: #68778d;
  --color-success: #05b169;
  --color-success-bg: #ecfdf5;
  --color-success-border: #86efac;
  --color-danger: #cf202f;
  --color-danger-bg: #fef2f2;
  --color-danger-border: #fca5a5;
  --color-claude: #d97757;
  --color-claude-bg: #fff7f4;
  --color-claude-border: #f3d2c6;
  --shadow-card: 0 2px 8px rgb(30 41 59 / 4%);
  --shadow-md: 0 6px 20px rgb(30 41 59 / 7%);
  --radius-card: 12px;
  --radius-md: 10px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--color-surface-soft);
  color: var(--color-ink);
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* Xr-AI Style Sticky Topbar */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgb(255 255 255 / 92%);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-hairline);
  padding: 14px 24px;
}

.topbar-inner {
  max-width: 1320px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--color-ink);
  text-decoration: none;
}

.brand-monogram {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border-radius: 10px;
  background: var(--color-primary);
  color: #ffffff;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.5px;
  box-shadow: 0 3px 8px rgb(41 104 238 / 22%);
}

.brand-copy {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-ink);
  line-height: 1.2;
}

.brand-sub {
  font-size: 12px;
  color: var(--color-muted);
  margin-top: 2px;
}

/* Segmented Navigation Tabs (Xr-AI Style) */
.nav-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  background: var(--color-surface-soft);
  padding: 5px;
  border-radius: 999px;
  border: 1px solid var(--color-hairline);
}

.nav-tab {
  border: none;
  background: transparent;
  color: var(--color-body);
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.18s ease;
}

.nav-tab:hover {
  color: var(--color-primary);
}

.nav-tab.active {
  background: var(--color-canvas);
  color: var(--color-primary);
  box-shadow: 0 2px 6px rgb(30 41 59 / 8%);
}

/* Main Layout */
.container {
  max-width: 1320px;
  margin: 28px auto 64px;
  padding: 0 24px;
}

.tab-panel {
  display: none;
  animation: fadeIn 0.2s ease;
}

.tab-panel.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Page Header (Xr-AI style) */
.page-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-end;
  gap: 16px;
  margin-bottom: 20px;
}

.page-eyebrow {
  margin: 0 0 6px;
  color: var(--color-primary);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.page-title {
  margin: 0 0 4px;
  color: var(--color-ink);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

.page-desc {
  font-size: 14px;
  color: var(--color-body);
  margin: 0;
}

/* Legend & Filter Bars */
.legend-bar {
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-card);
  padding: 14px 18px;
  margin-bottom: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  box-shadow: var(--shadow-card);
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--color-body);
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}

.badge-green { background: #dcfce7; color: #058a52; }
.badge-amber { background: #fef3c7; color: #b45309; }
.badge-blue { background: var(--color-primary-soft); color: var(--color-primary); }
.badge-purple { background: #f3e8ff; color: #6d28d9; }
.badge-red { background: #fee2e2; color: var(--color-danger); }
.badge-claude { background: #ffedd5; color: #c2410c; }
.badge-slate { background: #f1f5f9; color: #334155; }

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-bottom: 20px;
}

.pill-btn {
  border: 1px solid var(--color-hairline);
  background: var(--color-canvas);
  color: var(--color-body);
  padding: 7px 16px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
}

.pill-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.pill-btn.active {
  background: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
  box-shadow: 0 2px 6px rgb(41 104 238 / 22%);
}

.search-input {
  padding: 9px 14px;
  border: 1px solid var(--color-hairline);
  border-radius: 10px;
  font-size: 14px;
  min-width: 260px;
  outline: none;
  background: var(--color-canvas);
  color: var(--color-ink);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.search-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgb(41 104 238 / 12%);
}

/* Model Cards Grid */
.model-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(370px, 1fr));
  gap: 16px;
}

.model-card {
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-card);
  padding: 18px 20px;
  box-shadow: var(--shadow-card);
  transition: transform 0.15s, box-shadow 0.15s, border-color 0.15s;
  display: flex;
  flex-direction: column;
  gap: 12px;
  cursor: pointer;
}

.model-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: #fdba74;
}

.model-card-cta {
  margin-top: auto;
  padding-top: 8px;
  border-top: 1px dashed var(--color-hairline);
  font-size: 12px;
  font-weight: 600;
  color: var(--color-claude-dark);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.model-card.warn-card {
  border: 1.5px solid #f59e0b;
  background: #fffbeb;
}

.model-card-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 10px;
  border-bottom: 1px solid #f1f5f9;
  padding-bottom: 12px;
}

.model-title-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.claude-icon-box {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: var(--color-claude-bg);
  border: 1px solid var(--color-claude-border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.model-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-ink);
  margin: 0;
}

.model-series {
  font-size: 12px;
  color: var(--color-muted);
  margin-top: 2px;
}

.model-specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.spec-box {
  background: var(--color-surface-soft);
  border-radius: 8px;
  padding: 8px 10px;
}

.spec-label {
  font-size: 11px;
  color: var(--color-muted);
  margin-bottom: 4px;
  font-weight: 600;
}

.model-note {
  font-size: 13px;
  color: var(--color-body);
  background: var(--color-surface-soft);
  border-left: 3px solid #94a3b8;
  padding: 8px 12px;
  border-radius: 0 6px 6px 0;
}

.warn-card .model-note {
  background: #fef3c7;
  border-left-color: #d97706;
  color: #92400e;
}

/* 9 Check Items Cards */
.check-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(390px, 1fr));
  gap: 18px;
}

.check-card {
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-card);
  padding: 20px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.check-head {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  border-bottom: 1px solid #f1f5f9;
  padding-bottom: 12px;
}

.check-num {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--color-primary);
  color: #ffffff;
  font-weight: 700;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.check-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-ink);
  margin: 0 0 3px;
}

.check-sub {
  font-size: 13px;
  color: var(--color-muted);
  margin: 0;
}

.info-block {
  border-radius: var(--radius-md);
  padding: 12px 14px;
}

.block-sales {
  background: var(--color-primary-soft);
  border-left: 4px solid var(--color-primary);
}

.block-tech {
  background: #f5f3ff;
  border-left: 4px solid #7c3aed;
}

.block-talk {
  background: var(--color-success-bg);
  border-left: 4px solid var(--color-success);
}

.block-label {
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 4px;
  letter-spacing: 0.3px;
}

.block-sales .block-label { color: var(--color-primary); }
.block-tech .block-label { color: #6d28d9; }
.block-talk .block-label { color: #058a52; }

.block-text {
  font-size: 13.5px;
  color: var(--color-ink);
  margin: 0;
}

/* Diagnostic Console (Tab 3) */
.diag-layout {
  display: grid;
  grid-template-columns: 450px 1fr;
  gap: 22px;
  align-items: start;
}

@media (max-width: 1000px) {
  .diag-layout {
    grid-template-columns: 1fr;
  }
}

.diag-panel {
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-card);
  padding: 20px;
  box-shadow: var(--shadow-card);
}

.diag-panel-title {
  font-size: 17px;
  font-weight: 700;
  margin: 0 0 16px;
  color: var(--color-ink);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Claude Model Selector Card */
.model-slot-card {
  background: var(--color-claude-bg);
  border: 1.5px solid var(--color-claude-border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  margin-bottom: 16px;
  transition: all 0.2s ease;
}

.slot-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
  gap: 8px;
}

.slot-title-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
}

.slot-label {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--color-ink);
}

.model-slot-card .slot-label {
  color: #9a3412;
}

.model-preview-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}

/* Dynamic Green / Red Error Slot Cards */
.err-slot-card {
  border-radius: var(--radius-md);
  padding: 12px 14px;
  margin-bottom: 12px;
  transition: all 0.2s ease;
}

/* Green state: 未选择异常 */
.err-slot-card.state-ok {
  background: var(--color-success-bg);
  border: 1.5px solid var(--color-success-border);
}

.err-slot-card.state-ok .slot-label {
  color: #065f46;
}

.err-slot-card.state-ok .form-select {
  border-color: #6ee7b7;
  color: #065f46;
  background-color: #ffffff;
}

/* Red state: 有异常选中 */
.err-slot-card.state-err {
  background: var(--color-danger-bg);
  border: 1.5px solid var(--color-danger-border);
  box-shadow: 0 2px 8px rgb(207 32 47 / 8%);
}

.err-slot-card.state-err .slot-label {
  color: #991b1b;
}

.err-slot-card.state-err .form-select {
  border-color: #f87171;
  color: #991b1b;
  font-weight: 600;
  background-color: #ffffff;
}

.slot-status-pill {
  font-size: 11.5px;
  font-weight: 700;
  padding: 2px 9px;
  border-radius: 999px;
}

.state-ok .slot-status-pill {
  background: #d1fae5;
  color: #047857;
}

.state-err .slot-status-pill {
  background: #fee2e2;
  color: var(--color-danger);
}

.form-select {
  width: 100%;
  appearance: none;
  -webkit-appearance: none;
  padding: 10px 38px 10px 12px;
  border: 1.5px solid #cbd5e1;
  border-radius: 10px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--color-ink);
  background-color: #ffffff;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 16px 16px;
  outline: none;
  cursor: pointer;
  transition: border-color 0.16s ease, box-shadow 0.16s ease, background-color 0.16s ease;
}

.form-select:hover {
  border-color: #94a3b8;
}

.model-slot-card .form-select {
  border-color: #e9b4a2;
  font-weight: 600;
  color: #7c2d12;
}

.model-slot-card .form-select:focus {
  border-color: var(--color-claude);
  box-shadow: 0 0 0 3px rgb(217 119 87 / 18%);
}

.form-select:focus {
  box-shadow: 0 0 0 3px rgb(41 104 238 / 12%);
}

.btn-reset {
  width: 100%;
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid var(--color-hairline);
  background: var(--color-surface-soft);
  color: var(--color-body);
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  margin-top: 6px;
  transition: all 0.15s;
}

.btn-reset:hover {
  background: var(--color-surface-strong);
  color: var(--color-ink);
}

/* Diagnostic Result Output */
.verdict-card {
  border-radius: var(--radius-card);
  padding: 22px 24px;
  margin-bottom: 18px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-hairline);
  border-left: 6px solid var(--color-primary);
  background: var(--color-canvas);
}

.verdict-card.level-critical {
  border-left-color: var(--color-danger);
  background: linear-gradient(to right, #fef2f2, #ffffff 35%);
}

.verdict-card.level-warning {
  border-left-color: #d97706;
  background: linear-gradient(to right, #fffbeb, #ffffff 35%);
}

.verdict-card.level-baseline {
  border-left-color: var(--color-primary);
  background: linear-gradient(to right, #edf3ff, #ffffff 35%);
}

.verdict-card.level-ok {
  border-left-color: var(--color-success);
  background: linear-gradient(to right, #ecfdf5, #ffffff 35%);
}

.verdict-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 6px;
  margin-bottom: 10px;
}

.verdict-title {
  font-size: 20px;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--color-ink);
}

.verdict-summary {
  font-size: 14.5px;
  color: var(--color-body);
  margin: 0 0 14px;
}

.verdict-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  padding-top: 12px;
  border-top: 1px solid rgb(30 41 59 / 8%);
  font-size: 13px;
  color: var(--color-body);
}

.detail-item-card {
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-left: 4px solid var(--color-danger);
  border-radius: var(--radius-md);
  padding: 18px;
  margin-bottom: 14px;
  box-shadow: var(--shadow-card);
}

.detail-item-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid #f1f5f9;
}

.detail-item-title {
  font-size: 15.5px;
  font-weight: 700;
  color: var(--color-ink);
  margin: 0;
}

.copy-btn {
  border: 1px solid var(--color-success);
  background: var(--color-success-bg);
  color: #058a52;
  font-size: 12px;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.15s;
}

.copy-btn:hover {
  background: var(--color-success);
  color: #ffffff;
}

/* Full KB List at Bottom */
.kb-divider {
  margin: 36px 0 18px;
  padding-top: 24px;
  border-top: 1px dashed #cbd5e1;
}

.kb-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(390px, 1fr));
  gap: 14px;
}

.empty-state {
  background: var(--color-canvas);
  border: 1.5px dashed var(--color-success-border);
  background: var(--color-success-bg);
  border-radius: var(--radius-card);
  padding: 44px 24px;
  text-align: center;
  color: #065f46;
  font-size: 15px;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--color-ink);
  color: #ffffff;
  padding: 10px 18px;
  border-radius: 10px;
  font-size: 13.5px;
  font-weight: 600;
  box-shadow: 0 8px 24px rgb(0 0 0 / 22%);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
  z-index: 999;
}

.toast.show {
  opacity: 1;
}

/* Tab 4: NewAPI & HTTP Error Dictionary (Minimalist TOC Layout) */
.err-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 24px;
  align-items: start;
}

@media (max-width: 900px) {
  .err-layout {
    grid-template-columns: 1fr;
  }
}

.err-toc {
  position: sticky;
  top: 86px;
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-card);
  padding: 16px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.err-toc-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-ink);
  margin: 0 0 4px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-hairline);
}

.err-toc-btn {
  width: 100%;
  text-align: left;
  border: 1px solid transparent;
  background: transparent;
  color: var(--color-body);
  padding: 9px 12px;
  border-radius: 8px;
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  transition: all 0.15s;
}

.err-toc-btn:hover {
  background: var(--color-surface-soft);
  color: var(--color-primary);
}

.err-toc-btn.active {
  background: var(--color-primary-soft);
  border-color: var(--color-primary-border);
  color: var(--color-primary);
}

.err-toc-count {
  font-size: 11.5px;
  padding: 1px 7px;
  border-radius: 999px;
  background: var(--color-surface-strong);
  color: var(--color-body);
  font-weight: 700;
}

.err-toc-btn.active .err-toc-count {
  background: var(--color-primary);
  color: #ffffff;
}

.err-group-section {
  margin-bottom: 28px;
  scroll-margin-top: 88px;
}

.err-group-title {
  margin: 0 0 12px;
  padding: 0 0 8px 10px;
  border-left: 4px solid var(--color-primary);
  font-size: 16px;
  font-weight: 700;
  color: var(--color-ink);
}

.err-doc-card {
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-card);
  padding: 16px 20px;
  margin-bottom: 12px;
  box-shadow: var(--shadow-card);
}

.err-doc-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.err-doc-title-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.err-code-pill {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  font-weight: 700;
  padding: 3px 9px;
  border-radius: 6px;
  background: var(--color-ink);
  color: #ffffff;
}

.err-doc-title {
  margin: 0;
  font-size: 15.5px;
  font-weight: 700;
  color: var(--color-ink);
}

.err-log-box {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12.5px;
  line-height: 1.5;
  background: var(--color-surface-soft);
  border: 1px solid var(--color-hairline);
  color: var(--color-ink);
  padding: 9px 12px;
  border-radius: 8px;
  margin-bottom: 10px;
  overflow-x: auto;
  word-break: break-all;
}

.err-explain {
  font-size: 13.5px;
  color: var(--color-body);
  margin: 0 0 12px;
  line-height: 1.6;
}

.err-explain strong {
  color: var(--color-ink);
}

.err-doc-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.err-followup-list {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.err-followup {
  border: 1px solid var(--color-primary-border);
  background: #f8faff;
  border-radius: 9px;
  overflow: hidden;
}

.err-followup summary {
  list-style: none;
  cursor: pointer;
  padding: 10px 14px;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  user-select: none;
}

.err-followup summary::-webkit-details-marker {
  display: none;
}

.err-followup summary::after {
  content: "展开查看 ▾";
  font-size: 12px;
  font-weight: 600;
  color: var(--color-muted);
  flex-shrink: 0;
}

.err-followup[open] summary {
  border-bottom: 1px solid var(--color-primary-border);
  background: var(--color-primary-soft);
}

.err-followup[open] summary::after {
  content: "收起 ▴";
}

.err-followup-body {
  padding: 12px 14px;
  font-size: 13.5px;
  color: var(--color-body);
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.err-smart-bar {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  width: 100%;
  margin-bottom: 18px;
}

.err-smart-input {
  flex: 1;
  min-width: 280px;
  padding: 11px 16px;
  border: 1.5px solid var(--color-primary-border);
  border-radius: 10px;
  font-size: 14px;
  outline: none;
  background: var(--color-canvas);
  color: var(--color-ink);
  box-shadow: var(--shadow-card);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.err-smart-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgb(41 104 238 / 14%);
}

.err-clear-btn {
  padding: 10px 16px;
  border-radius: 10px;
  border: 1px solid var(--color-hairline);
  background: var(--color-canvas);
  color: var(--color-body);
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
}

.err-clear-btn:hover {
  background: var(--color-surface-strong);
  color: var(--color-ink);
}

.err-match-banner {
  display: none;
  margin-bottom: 16px;
  padding: 12px 16px;
  border-radius: 10px;
  background: var(--color-primary-soft);
  border: 1px solid var(--color-primary-border);
  color: var(--color-primary);
  font-size: 13.5px;
  font-weight: 600;
}

.err-match-banner.show {
  display: block;
}

.err-match-banner.warn {
  background: #fffbeb;
  border-color: #fde68a;
  color: #b45309;
}

.err-scene-tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 700;
  background: #eef2ff;
  color: #4338ca;
  border: 1px solid #c7d2fe;
  margin-bottom: 10px;
}

.err-talk-preview {
  flex: 1;
  min-width: 240px;
  font-size: 13px;
  color: #065f46;
  background: var(--color-success-bg);
  border: 1px solid #bbf7d0;
  padding: 8px 12px;
  border-radius: 8px;
}

.err-mobile-cat-wrap {
  display: none;
  margin-bottom: 14px;
  position: relative;
  z-index: 30;
}

/* Custom Interactive Mobile Category Dropdown */
.custom-select {
  position: relative;
  width: 100%;
}

.custom-select-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 11px 14px;
  background: var(--color-canvas);
  border: 1.5px solid #cbd5e1;
  border-radius: 12px;
  box-shadow: var(--shadow-card);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-ink);
  cursor: pointer;
  transition: border-color 0.18s ease, box-shadow 0.18s ease, transform 0.12s ease;
}

.custom-select-trigger:active {
  transform: scale(0.99);
}

.custom-select.open .custom-select-trigger {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgb(41 104 238 / 14%);
}

.custom-select-trigger-left {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.custom-select-tag {
  font-size: 11px;
  font-weight: 700;
  color: var(--color-primary);
  background: var(--color-primary-soft);
  padding: 2px 7px;
  border-radius: 999px;
  flex-shrink: 0;
}

.custom-select-label {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.custom-select-trigger-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.custom-select-badge {
  font-size: 12px;
  font-weight: 700;
  color: var(--color-primary);
  background: var(--color-primary-soft);
  padding: 2px 9px;
  border-radius: 999px;
}

.custom-select-arrow {
  width: 18px;
  height: 18px;
  color: var(--color-muted);
  transition: transform 0.2s ease, color 0.18s ease;
}

.custom-select.open .custom-select-arrow {
  transform: rotate(180deg);
  color: var(--color-primary);
}

.custom-select-menu {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: 14px;
  padding: 6px;
  box-shadow: 0 12px 28px rgb(15 23 42 / 14%);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s ease;
  z-index: 40;
}

.custom-select.open .custom-select-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.custom-select-option {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 12px;
  border: none;
  background: transparent;
  border-radius: 9px;
  font-family: inherit;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--color-body);
  cursor: pointer;
  text-align: left;
  transition: background 0.14s ease, color 0.14s ease;
}

.custom-select-option:hover,
.custom-select-option:active {
  background: var(--color-surface-soft);
  color: var(--color-ink);
}

.custom-select-option.active {
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

.custom-select-opt-right {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.custom-select-opt-count {
  font-size: 11.5px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 999px;
  background: #f1f5f9;
  color: var(--color-muted);
}

.custom-select-option.active .custom-select-opt-count {
  background: rgb(41 104 238 / 14%);
  color: var(--color-primary);
}

.custom-select-check {
  font-size: 13px;
  font-weight: 800;
  opacity: 0;
  color: var(--color-primary);
}

.custom-select-option.active .custom-select-check {
  opacity: 1;
}

/* ==================== Mobile Responsive Adaptation ==================== */
@media (max-width: 960px) {
  .diag-panel {
    position: static;
  }
}

@media (max-width: 900px) {
  .err-toc {
    display: none;
  }

  .err-mobile-cat-wrap {
    display: block;
  }
}

@media (max-width: 768px) {
  .topbar {
    padding: 10px 14px;
  }

  .topbar-inner {
    gap: 10px;
  }

  .brand-monogram {
    width: 32px;
    height: 32px;
    font-size: 14px;
  }

  .brand-name {
    font-size: 15px;
  }

  .brand-sub {
    display: none;
  }

  .nav-tabs {
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    border-radius: 14px;
    padding: 4px;
    gap: 4px;
  }

  .nav-tab {
    width: 100%;
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    padding: 8px 6px;
    font-size: 12.5px;
    border-radius: 10px;
  }

  .container {
    margin: 18px auto 48px;
    padding: 0 14px;
  }

  .page-title {
    font-size: 20px;
  }

  .page-desc {
    font-size: 13px;
  }

  .legend-bar {
    padding: 12px 14px;
    gap: 8px;
  }

  .legend-item {
    font-size: 12.5px;
  }

  .filter-bar {
    gap: 8px;
  }

  .search-input,
  .err-smart-input {
    min-width: 0;
    width: 100%;
    font-size: 16px;
  }

  .form-select {
    font-size: 16px;
    padding: 10px 12px;
  }

  .err-clear-btn {
    width: 100%;
  }

  .model-grid,
  .check-grid,
  .kb-list {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .model-card,
  .check-card,
  .err-doc-card,
  .diag-panel,
  .verdict-card,
  .detail-item-card {
    padding: 14px 15px;
  }

  .model-meta-grid {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .err-doc-footer {
    flex-direction: column;
    align-items: stretch;
  }

  .err-talk-preview {
    min-width: 0;
  }

  .copy-btn {
    width: 100%;
    padding: 8px 14px;
    text-align: center;
  }

  .toast {
    left: 14px;
    right: 14px;
    bottom: 16px;
    text-align: center;
  }
}