:root {
  --bg: #f4f5f7;
  --panel: #ffffff;
  --panel-subtle: #fafbfc;
  --line: #d7dce5;
  --line-strong: #c7cfdb;
  --text: #1f2937;
  --muted: #6b7280;
  --accent: #2563eb;
  --accent-soft: #eaf1ff;
  --success: #0f766e;
  --danger: #b91c1c;
  --shadow: 0 2px 10px rgba(15, 23, 42, 0.04);
  --radius: 10px;
  --radius-sm: 8px;
  --btn-height: 38px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.55 "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

a {
  color: inherit;
  text-decoration: none;
}

pre {
  margin: 0;
}

.hidden {
  display: none !important;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: rgba(244, 245, 247, 0.96);
  backdrop-filter: blur(8px);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  max-width: 1480px;
  margin: 0 auto;
  padding: var(--space-2) var(--space-4);
}

.topbar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.topbar-brand strong {
  font-size: 16px;
}

.topbar-brand span,
.topbar-status,
.section-kicker,
.group-title,
.selected-model-meta,
.provider-name,
.model-desc,
.trial-note,
.message-meta,
.sidebar-note,
.hero-text {
  color: var(--muted);
}

.topbar-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.topbar-status {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--btn-height);
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
}

.page-shell {
  max-width: 1480px;
  margin: 0 auto;
  padding: var(--space-3);
  display: grid;
  gap: var(--space-3);
}

.hero-card,
.sidebar,
.toolbar,
.selected-strip,
.table-shell,
.empty-state,
.trial-card,
.model-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-4);
}

.hero-copy {
  flex: 1 1 auto;
  min-width: 0;
}

.hero-copy-head {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.hero-panel-toggle {
  min-width: 112px;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.hero-kicker,
.section-kicker,
.group-title,
.search-label {
  margin: 0 0 var(--space-1);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.hero-card h1,
.brand-block h2,
.trial-head h2,
.selected-strip h3 {
  margin: 0;
}

.hero-text {
  margin: var(--space-1) 0 0;
}

.view-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--panel-subtle);
}

.download-entry {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  justify-content: flex-end;
}

.download-entry-label {
  display: inline-flex;
  align-items: center;
  min-height: var(--btn-height);
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.25;
  white-space: nowrap;
}

.download-entry-actions {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.models-layout {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: var(--space-3);
  align-items: start;
}

.sidebar {
  padding: var(--space-3);
}

.brand-block {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--line);
}

.brand-mark {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-sm);
  background: #1f2937;
  color: #ffffff;
  font-weight: 700;
}

.sidebar-group + .sidebar-group {
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid var(--line);
}

.filter-list {
  display: grid;
  gap: var(--space-1);
}

.filter-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: 8px 10px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text);
  cursor: pointer;
}

.filter-btn:hover,
.filter-btn.is-active,
.view-btn.is-active,
.switch-btn.is-active {
  border-color: #bfdbfe;
  background: var(--accent-soft);
  color: #1d4ed8;
}

.filter-count,
.type-pill,
.chip,
.stat-pill,
.user-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 24px;
  padding: 0 8px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--panel-subtle);
  color: var(--muted);
  font-size: 12px;
}

.sidebar-link {
  display: inline-flex;
  margin-top: var(--space-2);
  color: var(--accent);
  font-weight: 600;
}

.sidebar-contact {
  display: grid;
  gap: var(--space-2);
}

.sidebar-qr {
  display: block;
  width: 100%;
  max-width: 176px;
  margin: 0 auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--panel-subtle);
}

.sidebar-contact-text {
  margin: 0;
  color: var(--muted);
  word-break: break-word;
}

.sidebar-contact-text a {
  color: var(--accent);
}

.models-main {
  display: grid;
  gap: var(--space-3);
  align-content: start;
  align-items: start;
}

.toolbar {
  display: grid;
  grid-template-columns: 460px minmax(0, 1fr);
  align-items: end;
  gap: var(--space-3);
  padding: var(--space-3);
  align-self: start;
}

.search-box {
  width: 460px;
  min-width: 460px;
  max-width: 460px;
}

.search-box input,
.field-select,
.composer-input {
  width: 100%;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: var(--panel);
  color: var(--text);
}

.search-box input,
.field-select {
  min-height: 38px;
  padding: 0 10px;
}

.search-box input:focus,
.field-select:focus,
.composer-input:focus {
  outline: 2px solid rgba(37, 99, 235, 0.12);
  border-color: #93c5fd;
}

.toolbar-right,
.stats,
.selected-actions,
.trial-head-actions,
.gate-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.toolbar-right {
  flex: 1 1 auto;
  min-width: 0;
  justify-content: flex-end;
}

.view-btn,
.switch-btn,
.primary-btn,
.ghost-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  cursor: pointer;
  line-height: 1;
  white-space: nowrap;
  transition:
    transform 0.18s ease,
    box-shadow 0.18s ease,
    border-color 0.18s ease,
    background-color 0.18s ease,
    color 0.18s ease;
}

.view-btn,
.switch-btn {
  min-height: 32px;
  padding: 0 12px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--muted);
}

.primary-btn,
.ghost-btn {
  min-height: var(--btn-height);
  padding: 0 16px;
  font-size: 14px;
  font-weight: 600;
}

.primary-btn {
  border: 1px solid #1d4ed8;
  background: var(--accent);
  color: #ffffff;
  box-shadow: 0 8px 18px rgba(37, 99, 235, 0.14);
}

.ghost-btn {
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--text);
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}

.topbar-actions .ghost-btn,
.topbar-actions .primary-btn,
.download-entry-actions .ghost-btn,
.download-entry-actions .primary-btn {
  min-width: 82px;
}

.topbar-actions .topbar-status {
  min-width: 72px;
}

.primary-btn:hover,
.ghost-btn:hover,
.view-btn:hover,
.switch-btn:hover {
  transform: translateY(-1px);
}

.primary-btn:hover {
  background: #1d4ed8;
  box-shadow: 0 12px 22px rgba(37, 99, 235, 0.22);
}

.ghost-btn:hover {
  border-color: var(--line-strong);
  background: #f8fafc;
  box-shadow: 0 10px 18px rgba(15, 23, 42, 0.08);
}

.primary-btn:active,
.ghost-btn:active,
.view-btn:active,
.switch-btn:active {
  transform: translateY(0);
}

.primary-btn:focus-visible,
.ghost-btn:focus-visible,
.view-btn:focus-visible,
.switch-btn:focus-visible {
  outline: 2px solid rgba(37, 99, 235, 0.18);
  outline-offset: 2px;
}

.ghost-btn.is-disabled {
  cursor: not-allowed;
  opacity: 0.58;
}

.selected-strip,
.trial-card {
  padding: var(--space-3);
}

.selected-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.selected-model-name {
  font-size: 20px;
}

.selected-model-meta {
  margin: var(--space-1) 0 0;
}

.model-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-3);
}

.model-card {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  gap: var(--space-3);
  padding: var(--space-3);
  height: 460px;
  min-height: 460px;
  max-height: 460px;
  overflow: hidden;
}

.card-body {
  display: grid;
  align-content: start;
  gap: var(--space-1);
  min-height: 0;
  overflow: hidden;
}

.card-top,
.message-row,
.trial-head {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: var(--space-2);
}

.provider-avatar {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-sm);
  background: #111827;
  color: #ffffff;
  font-weight: 700;
}

.model-name {
  margin: 0;
  font-size: 18px;
  line-height: 1.3;
  word-break: break-word;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  overflow: hidden;
}

.provider-name,
.model-desc {
  margin: var(--space-1) 0 0;
}

.provider-name {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.model-desc {
  line-height: 1.5;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  overflow: hidden;
}

.pricing,
.chips {
  display: grid;
  gap: var(--space-1);
}

.price-row {
  display: flex;
  justify-content: space-between;
  gap: var(--space-2);
}

.chips {
  grid-auto-flow: row;
  overflow: hidden;
  max-height: 60px;
  align-content: start;
}

.chips span {
  width: fit-content;
}

.card-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2);
}

.table-shell {
  padding: var(--space-2);
}

.table-wrap {
  overflow: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

thead th {
  padding: 10px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  color: var(--muted);
  font-size: 12px;
}

tbody td {
  padding: 10px;
  border-bottom: 1px solid #edf0f5;
  vertical-align: top;
}

.row-actions {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.empty-state {
  padding: var(--space-4);
  text-align: center;
}

.trial-layout {
  display: grid;
  gap: var(--space-3);
}

.trial-note {
  margin: var(--space-1) 0 0;
}

.trial-auth-gate {
  margin-top: var(--space-3);
  padding: var(--space-4);
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-sm);
  background: var(--panel-subtle);
}

.trial-auth-gate h3 {
  margin: 0 0 var(--space-2);
}

.trial-auth-gate p {
  margin: 0;
  color: var(--muted);
}

.trial-workspace {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-3);
}

.trial-toolbar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 180px;
  gap: var(--space-2);
}

.field-block {
  display: grid;
  gap: var(--space-1);
}

.field-block span {
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
}

.conversation-shell,
.code-shell {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--panel-subtle);
  padding: var(--space-3);
}

.conversation-shell {
  display: grid;
  gap: var(--space-3);
}

.message-block {
  display: grid;
  gap: var(--space-1);
}

.message-actions,
.code-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.message-role {
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
}

.message-body {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  background: var(--panel);
  white-space: pre-wrap;
  word-break: break-word;
  min-height: 54px;
}

.user-message {
  background: #f7faff;
}

.assistant-message {
  min-height: 120px;
}

.result-stack {
  display: grid;
  gap: var(--space-2);
}

.result-note {
  white-space: pre-wrap;
  word-break: break-word;
}

.media-grid {
  display: grid;
  gap: var(--space-2);
}

.media-card {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #f8fafc;
  overflow: hidden;
}

.media-card img,
.media-card video {
  display: block;
  width: 100%;
  max-height: 420px;
  object-fit: contain;
  background: #0f172a;
}

.code-head {
  margin-bottom: var(--space-2);
}

.compact-btn {
  min-height: 32px;
  padding: 6px 12px;
  font-size: 12px;
}

.doc-modal {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: grid;
  place-items: center;
  padding: var(--space-3);
  background: rgba(15, 23, 42, 0.5);
  backdrop-filter: blur(6px);
}

.doc-dialog {
  width: min(1080px, 100%);
  max-height: calc(100vh - 32px);
  overflow: auto;
  display: grid;
  gap: var(--space-3);
  padding: var(--space-3);
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 2px);
  background: #ffffff;
  box-shadow: 0 24px 80px rgba(15, 23, 42, 0.18);
}

.doc-head,
.doc-foot {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.doc-summary {
  margin: var(--space-1) 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.doc-meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-2);
}

.doc-meta-card,
.doc-section {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--panel-subtle);
  padding: var(--space-3);
}

.doc-meta-card strong,
.doc-section h4 {
  display: block;
  margin: 0 0 var(--space-1);
  font-size: 13px;
}

.doc-meta-card span {
  color: var(--text);
  line-height: 1.5;
  word-break: break-word;
}

.doc-section h4 {
  font-size: 15px;
}

.doc-section p,
.doc-section li {
  color: var(--text);
  line-height: 1.6;
}

.doc-resource-table,
.doc-field-table {
  width: 100%;
  border-collapse: collapse;
}

.doc-resource-table th,
.doc-resource-table td,
.doc-field-table th,
.doc-field-table td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
  font-size: 13px;
}

.doc-resource-table th,
.doc-field-table th {
  color: var(--muted);
  font-weight: 600;
}

.doc-status-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 22px;
  padding: 0 8px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}

.doc-status-badge.is-yes {
  background: #dcfce7;
  color: #166534;
}

.doc-status-badge.is-optional {
  background: #dbeafe;
  color: #1d4ed8;
}

.doc-status-badge.is-provider {
  background: #fef3c7;
  color: #92400e;
}

.doc-status-badge.is-no {
  background: #f3f4f6;
  color: #6b7280;
}

.doc-chip-list,
.doc-source-list {
  display: flex;
  gap: var(--space-1);
  flex-wrap: wrap;
}

.doc-source-list a {
  color: var(--accent);
  font-weight: 600;
}

.doc-code {
  margin: 0;
  padding: var(--space-3);
  border-radius: var(--radius-sm);
  background: #0f172a;
  color: #dbeafe;
  white-space: pre-wrap;
  word-break: break-word;
  overflow: auto;
  font-size: 12px;
  line-height: 1.6;
}

.code-output {
  padding: var(--space-3);
  border-radius: var(--radius-sm);
  background: #0f172a;
  color: #dbeafe;
  white-space: pre-wrap;
  word-break: break-word;
  overflow: auto;
}

.form-error {
  padding: 10px 12px;
  border: 1px solid #fecaca;
  border-radius: var(--radius-sm);
  background: #fef2f2;
  color: var(--danger);
}

.composer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 96px;
  gap: var(--space-2);
  align-items: end;
}

.composer-input {
  min-height: 108px;
  padding: 10px 12px;
  resize: vertical;
}

.composer-btn {
  min-height: 42px;
}

@media (max-width: 1080px) {
  .models-layout {
    grid-template-columns: 1fr;
  }

  .toolbar,
  .selected-strip,
  .hero-card,
  .trial-head {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-copy-head {
    align-items: flex-start;
  }
}

@media (max-width: 760px) {
  .page-shell,
  .topbar-inner {
    padding: var(--space-2);
  }

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

  .search-box {
    width: 100%;
    min-width: 0;
    max-width: 100%;
  }

  .model-card {
    height: auto;
    min-height: 0;
    max-height: none;
  }

  .hero-actions,
  .download-entry,
  .toolbar-right {
    width: 100%;
    justify-content: flex-start;
  }

  .hero-panel-toggle {
    width: 100%;
    max-width: 160px;
  }

  .model-grid,
  .card-actions,
  .trial-toolbar,
  .composer {
    grid-template-columns: 1fr;
  }
}