:root {
  --bg: #101418;
  --bg-soft: #151b20;
  --surface: #1b2228;
  --surface-2: #202932;
  --surface-3: #26313c;
  --text: #eef5f2;
  --muted: #9aa8b5;
  --line: #313d49;
  --primary: #21a382;
  --primary-dark: #168267;
  --primary-soft: rgba(33, 163, 130, 0.16);
  --accent: #6aa6ff;
  --danger: #ff967d;
  --warning: #f5c46b;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.28);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
  background:
    radial-gradient(circle at top left, rgba(33, 163, 130, 0.18), transparent 340px),
    radial-gradient(circle at top right, rgba(106, 166, 255, 0.12), transparent 360px),
    linear-gradient(180deg, #101418 0%, #171d22 52%, #101418 100%);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(16, 20, 24, 0.9);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.nav {
  max-width: 1240px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  white-space: nowrap;
}

.brand-mark {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), #1b7bd1);
  border-radius: var(--radius);
  font-size: 18px;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 6px;
  flex-wrap: wrap;
}

.nav-links a {
  padding: 7px 9px;
  border-radius: 6px;
  color: var(--muted);
  font-size: 14px;
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
  background: var(--primary-soft);
}

.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 34px 20px 58px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  margin-bottom: 14px;
  padding: 4px 10px;
  color: #9df0d7;
  background: rgba(33, 163, 130, 0.12);
  border: 1px solid rgba(33, 163, 130, 0.28);
  border-radius: 999px;
  font-weight: 800;
  font-size: 14px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(310px, 0.75fr);
  gap: 22px;
  align-items: stretch;
  padding: 22px 0 10px;
}

.hero h1,
.page-title h1 {
  margin: 0 0 14px;
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1.12;
  letter-spacing: 0;
}

.hero p,
.page-title p {
  margin: 0;
  max-width: 760px;
  color: var(--muted);
  font-size: 18px;
}

.hero-main,
.hero-panel,
.form-card,
.result-card,
.content-card,
.card,
.tool-panel {
  background: rgba(27, 34, 40, 0.92);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-main {
  padding: 30px;
}

.hero-panel {
  padding: 24px;
}

.hero-panel h2,
.form-card h2,
.result-card h2,
.content-card h2 {
  margin: 0 0 16px;
  font-size: 22px;
}

.guide-list {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
}

.guide-list li {
  margin: 8px 0;
}

.quick-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 24px;
}

.stat-card {
  padding: 18px;
  background: rgba(32, 41, 50, 0.8);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.stat-card strong {
  display: block;
  font-size: 28px;
  color: #9df0d7;
  line-height: 1.1;
}

.stat-card span {
  color: var(--muted);
  font-size: 14px;
}

.section {
  margin-top: 34px;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.section h2,
.section-head h2 {
  margin: 0;
  font-size: 26px;
}

.section-head p {
  margin: 6px 0 0;
  color: var(--muted);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.card-grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card-grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card {
  min-height: 168px;
  padding: 20px;
  transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.card:hover {
  transform: translateY(-3px);
  border-color: rgba(33, 163, 130, 0.48);
  background: rgba(32, 41, 50, 0.98);
}

.card h3 {
  margin: 0 0 10px;
  font-size: 20px;
}

.card p {
  margin: 0 0 16px;
  color: var(--muted);
}

.link {
  color: #9df0d7;
  font-weight: 800;
}

.page-title {
  margin-bottom: 24px;
  padding: 24px;
  background: rgba(27, 34, 40, 0.72);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.layout {
  display: grid;
  grid-template-columns: minmax(280px, 420px) minmax(0, 1fr);
  gap: 22px;
  align-items: start;
}

.dashboard-grid {
  display: grid;
  grid-template-columns: minmax(300px, 420px) minmax(0, 1fr);
  gap: 22px;
  align-items: start;
}

.wide-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.form-card,
.result-card,
.content-card,
.tool-panel {
  padding: 22px;
}

.form-grid {
  display: grid;
  gap: 16px;
}

.form-grid.compact {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.form-grid.compact .actions {
  grid-column: 1 / -1;
}

.field {
  display: grid;
  gap: 8px;
}

.field label,
.fieldset-title {
  font-weight: 800;
}

input,
select,
textarea {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  color: var(--text);
  background: #11171d;
  border: 1px solid #354351;
  border-radius: 6px;
  font: inherit;
}

textarea {
  min-height: 120px;
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  outline: 3px solid rgba(106, 166, 255, 0.18);
  border-color: var(--accent);
}

.checkbox-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.check-item {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: rgba(17, 23, 29, 0.72);
}

.check-item input {
  width: 16px;
  min-height: 16px;
  accent-color: var(--primary);
}

.actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 4px;
}

.btn {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  border: 0;
  border-radius: 6px;
  background: var(--primary);
  color: #fff;
  font: inherit;
  font-weight: 900;
  cursor: pointer;
}

.btn:hover {
  background: var(--primary-dark);
}

.btn.secondary {
  color: #9df0d7;
  background: rgba(33, 163, 130, 0.14);
  border: 1px solid rgba(33, 163, 130, 0.35);
}

.btn.ghost {
  color: var(--text);
  background: var(--surface-3);
  border: 1px solid var(--line);
}

.btn:disabled {
  cursor: not-allowed;
  opacity: 0.72;
}

.result-card {
  min-height: 360px;
}

.empty-state,
.notice {
  color: var(--muted);
  background: rgba(17, 23, 29, 0.68);
  border: 1px dashed #495766;
  border-radius: var(--radius);
  padding: 18px;
}

.notice {
  border-style: solid;
}

.error {
  color: var(--danger);
  background: rgba(255, 150, 125, 0.12);
  border: 1px solid rgba(255, 150, 125, 0.35);
  border-radius: var(--radius);
  padding: 14px;
}

.loading {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #9df0d7;
  font-weight: 800;
}

.spinner {
  width: 18px;
  height: 18px;
  border: 3px solid rgba(33, 163, 130, 0.18);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.result-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.copy-status {
  color: var(--muted);
  font-size: 14px;
}

.copy-btn {
  min-height: 36px;
  padding: 7px 12px;
  color: #9df0d7;
  background: rgba(33, 163, 130, 0.14);
  border: 1px solid rgba(33, 163, 130, 0.35);
  border-radius: 6px;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.copy-btn:hover {
  background: rgba(33, 163, 130, 0.22);
}

.markdown-result h1,
.markdown-result h2,
.markdown-result h3 {
  margin: 20px 0 8px;
  line-height: 1.35;
}

.markdown-result h1 {
  font-size: 24px;
}

.markdown-result h2 {
  font-size: 21px;
}

.markdown-result h3 {
  font-size: 18px;
}

.markdown-result p {
  margin: 8px 0;
  color: #d8e2eb;
}

.markdown-result ul,
.markdown-result ol {
  margin: 8px 0 12px 22px;
  padding: 0;
}

.markdown-result li {
  margin: 5px 0;
}

.content-card ul {
  margin: 0;
  padding-left: 20px;
}

.content-card li {
  margin: 8px 0;
}

.tag-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tag {
  padding: 6px 10px;
  color: #9df0d7;
  background: rgba(33, 163, 130, 0.12);
  border: 1px solid rgba(33, 163, 130, 0.3);
  border-radius: 999px;
  font-size: 14px;
}

.module-list {
  display: grid;
  gap: 16px;
}

.ability-summary {
  display: grid;
  gap: 6px;
  margin-bottom: 16px;
  padding: 14px;
  background: rgba(33, 163, 130, 0.12);
  border: 1px solid rgba(33, 163, 130, 0.3);
  border-radius: var(--radius);
}

.ability-summary strong {
  color: #9df0d7;
  font-size: 20px;
}

.ability-summary span {
  color: var(--muted);
}

.ability-chart {
  display: grid;
  gap: 12px;
}

.ability-row {
  display: grid;
  gap: 6px;
}

.ability-meta {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.ability-meta span {
  color: #9df0d7;
  font-weight: 900;
}

.ability-track {
  height: 12px;
  overflow: hidden;
  background: #10171d;
  border: 1px solid var(--line);
  border-radius: 999px;
}

.ability-track span {
  display: block;
  height: 100%;
  border-radius: 999px;
}

.ability-track .stable,
.map-card.stable {
  background: linear-gradient(90deg, #21a382, #7ee4c8);
}

.ability-track .warning,
.map-card.warning {
  background: linear-gradient(90deg, #d6a83a, #f5d47b);
}

.ability-track .danger,
.map-card.danger {
  background: linear-gradient(90deg, #d75f4c, #ff967d);
}

.ability-row small {
  color: var(--muted);
}

.advice-box {
  margin-top: 16px;
  padding: 14px;
  background: rgba(17, 23, 29, 0.68);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.advice-box h3 {
  margin: 0 0 8px;
}

.advice-box p {
  margin: 6px 0;
  color: #d8e2eb;
}

.advice-box ol {
  margin: 0;
  padding-left: 20px;
}

.map-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
}

.map-card {
  min-height: 150px;
  display: grid;
  align-content: space-between;
  gap: 10px;
  padding: 18px;
  color: #101418;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.map-card strong {
  font-size: 20px;
}

.map-card span {
  font-weight: 900;
}

.map-card small {
  color: rgba(16, 20, 24, 0.72);
  font-weight: 800;
}

.module-card {
  padding: 20px;
  background: rgba(27, 34, 40, 0.92);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.module-card h2 {
  margin: 0 0 12px;
}

.module-columns {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
}

.module-columns div {
  padding: 12px;
  background: rgba(17, 23, 29, 0.6);
  border: 1px solid var(--line);
  border-radius: 6px;
}

.module-columns strong {
  display: block;
  margin-bottom: 8px;
  color: #9df0d7;
}

.resource-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 16px;
}

.footer {
  margin-top: 42px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  padding-top: 22px;
  font-size: 14px;
}

code {
  padding: 2px 5px;
  background: #11171d;
  border: 1px solid var(--line);
  border-radius: 4px;
}

pre {
  overflow-x: auto;
  padding: 14px;
  background: #0d1217;
  color: #eff6ff;
  border-radius: var(--radius);
}

@media (max-width: 1080px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-links {
    width: 100%;
    justify-content: flex-start;
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 4px;
  }

  .card-grid,
  .stats-grid,
  .module-columns,
  .map-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 820px) {
  .hero,
  .layout,
  .dashboard-grid,
  .card-grid.two,
  .card-grid.three {
    grid-template-columns: 1fr;
  }

  .hero-main {
    padding: 24px;
  }
}

@media (max-width: 620px) {
  .container {
    padding: 24px 14px 44px;
  }

  .hero h1,
  .page-title h1 {
    font-size: 34px;
  }

  .card-grid,
  .stats-grid,
  .module-columns,
  .map-grid,
  .form-grid.compact,
  .checkbox-grid {
    grid-template-columns: 1fr;
  }

  .result-toolbar,
  .section-head {
    align-items: flex-start;
    flex-direction: column;
  }
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font-size: 22px;
  cursor: pointer;
}

.doc-shell {
  width: min(1500px, calc(100% - 32px));
  margin: 0 auto;
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr) 220px;
  gap: 24px;
  padding: 28px 0 56px;
}

.doc-sidebar,
.doc-toc {
  position: sticky;
  top: 88px;
  align-self: start;
  max-height: calc(100vh - 104px);
  overflow: auto;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(27, 34, 40, 0.92);
}

.doc-sidebar h2,
.doc-toc h2 {
  margin: 0 0 12px;
  font-size: 16px;
}

.doc-sidebar a,
.doc-toc a {
  display: block;
  padding: 8px 10px;
  border-radius: 6px;
  color: var(--muted);
  font-size: 14px;
}

.doc-sidebar a:hover,
.doc-toc a:hover {
  background: var(--primary-soft);
  color: var(--text);
}

.doc-content {
  min-width: 0;
}

.doc-hero {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(33, 163, 130, 0.16), rgba(27, 34, 40, 0.86));
  box-shadow: var(--shadow);
}

.doc-hero h1 {
  margin: 10px 0;
  font-size: clamp(32px, 5vw, 56px);
  line-height: 1.05;
  letter-spacing: 0;
}

.doc-hero p {
  max-width: 760px;
  color: var(--muted);
  font-size: 17px;
}

.doc-ai-result {
  margin: 22px 0;
  min-height: auto;
}

.doc-chapter {
  margin: 26px 0 14px;
  padding: 18px 20px;
  border-left: 4px solid var(--primary);
  background: var(--primary-soft);
}

.doc-chapter h2 {
  margin: 0 0 8px;
  font-size: 28px;
}

.doc-chapter p {
  margin: 0;
  color: var(--muted);
}

.doc-section {
  margin: 18px 0;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  scroll-margin-top: 96px;
}

.doc-section:hover {
  border-color: rgba(33, 163, 130, 0.52);
  transform: translateY(-1px);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.doc-section h3 {
  margin: 0 0 18px;
  font-size: 26px;
}

.knowledge-list {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 10px 18px;
  margin: 0;
}

.knowledge-list dt {
  color: #9df0d7;
  font-weight: 800;
}

.knowledge-list dd {
  margin: 0;
  color: var(--muted);
}

.ai-action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.btn.mini {
  padding: 10px 14px;
  min-height: 40px;
  font-size: 14px;
}

.idiom-panel {
  display: grid;
  gap: 22px;
}

.idiom-search {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.idiom-search label {
  display: block;
  margin-bottom: 12px;
  font-size: 18px;
  font-weight: 800;
}

.search-line {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
}

.search-line input {
  width: 100%;
  min-height: 48px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #11171d;
  color: var(--text);
  font: inherit;
}

.idiom-search p {
  margin: 12px 0 0;
  color: var(--muted);
}

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

.idiom-card {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.idiom-card:hover {
  border-color: rgba(33, 163, 130, 0.52);
}

.idiom-card h2 {
  margin: 0 0 12px;
  font-size: 24px;
}

.idiom-card p {
  margin: 8px 0;
  color: var(--muted);
}

.idiom-card strong {
  color: var(--text);
}

@media (max-width: 1180px) {
  .doc-shell {
    grid-template-columns: 220px minmax(0, 1fr);
  }

  .doc-toc {
    display: none;
  }
}

@media (max-width: 900px) {
  .nav {
    position: relative;
    align-items: center;
    flex-direction: row;
  }

  .nav-toggle {
    display: grid;
    place-items: center;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: calc(100% + 10px);
    left: 12px;
    right: 12px;
    z-index: 20;
    width: auto;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(16, 20, 24, 0.98);
    box-shadow: var(--shadow);
    overflow: visible;
  }

  .nav-links.open {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 6px;
  }

  .nav-links a {
    width: 100%;
    text-align: center;
  }

  .doc-shell {
    width: min(100% - 24px, 760px);
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .doc-sidebar {
    position: static;
    max-height: none;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 4px;
  }

  .doc-sidebar h2 {
    grid-column: 1 / -1;
  }

  .doc-hero,
  .doc-section {
    padding: 20px;
  }

  .knowledge-list {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .knowledge-list dd {
    margin-bottom: 10px;
  }

  .idiom-results {
    grid-template-columns: 1fr;
  }

  .search-line {
    grid-template-columns: 1fr;
  }

  .nav:not(:has(.nav-toggle)) {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav:not(:has(.nav-toggle)) .nav-links {
    display: flex;
    position: static;
    width: 100%;
    padding: 0 0 4px;
    border: 0;
    background: transparent;
    box-shadow: none;
    overflow-x: auto;
    flex-wrap: nowrap;
  }

  .nav:not(:has(.nav-toggle)) .nav-links a {
    width: auto;
    white-space: nowrap;
  }
}