:root {
  --ink: #111827;
  --muted: #5f7088;
  --soft: #f7f9fc;
  --surface: #ffffff;
  --line: #e3e9f1;
  --line-strong: #c9d4e2;
  --blue: #2563d9;
  --blue-soft: #eff6ff;
  --green: #06966f;
  --code: #0b1120;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  background: var(--surface);
}

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

button {
  font: inherit;
}

.docs-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: grid;
  grid-template-columns: minmax(430px, auto) 1fr;
  gap: 20px;
  align-items: center;
  height: 64px;
  padding: 0 28px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  width: max-content;
}

.brand img {
  display: block;
  width: 210px;
  height: 40px;
  object-fit: cover;
  object-position: left center;
}

.top-links {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 14px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.top-links a:hover,
.sidebar a:hover,
.toc a:hover {
  color: var(--blue);
}

.brand-tagline {
  padding-left: 16px;
  border-left: 1px solid var(--line);
  color: var(--muted);
  font-size: 15px;
  font-weight: 700;
  white-space: nowrap;
}

.top-links .demo-link {
  color: #f97316 !important;
}

.top-links .demo-link:hover {
  color: #ea580c !important;
}

.lang-toggle {
  min-width: 48px;
  height: 34px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
  background: #ffffff;
  cursor: pointer;
}

.lang-toggle:hover {
  border-color: var(--line-strong);
}

.docs-shell {
  display: grid;
  grid-template-columns: 280px minmax(0, 820px) 240px;
  gap: 34px;
  max-width: 1380px;
  margin: 0 auto;
  padding: 0 28px;
}

.sidebar,
.toc {
  position: sticky;
  top: 64px;
  height: calc(100vh - 64px);
  overflow-y: auto;
  padding: 26px 0;
}

.sidebar {
  border-right: 1px solid var(--line);
  padding-right: 24px;
}

.sidebar-title,
.toc p {
  margin: 20px 0 9px;
  color: #94a3b8;
  font-size: 15px;
  font-weight: 800;
  text-transform: uppercase;
}

.sidebar-title:first-child,
.toc p:first-child {
  margin-top: 0;
}

.sidebar nav {
  display: grid;
  gap: 2px;
}

.sidebar a,
.toc a {
  display: block;
  border-radius: 8px;
  color: var(--muted);
  line-height: 1.45;
}

.sidebar a {
  font-size: 16px;
}

.sidebar a {
  padding: 9px 12px;
}

.sidebar a.is-active {
  color: var(--ink);
  background: #f3f6fa;
}

.toc {
  padding-left: 4px;
}

.toc a {
  padding: 7px 0;
  font-size: 16px;
}

.right-contact {
  display: grid;
  gap: 10px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #ffffff;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.035);
  text-align: center;
}

.right-contact strong {
  color: var(--ink);
  font-size: 17px;
}

.right-contact img {
  display: block;
  width: 120px;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
  border-radius: 8px;
}

.right-contact span,
.right-contact a {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.right-contact a {
  padding: 0;
  color: var(--blue);
}

.right-experience {
  display: grid;
  gap: 12px;
  margin-top: 14px;
  padding: 18px 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #ffffff;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.035);
  text-align: center;
}

.right-experience > strong {
  color: var(--ink);
  font-size: 16px;
  line-height: 1.4;
}

.right-experience address {
  display: grid;
  gap: 8px;
  color: var(--ink);
  font-style: normal;
}

.right-experience address span {
  font-size: 15px;
  font-weight: 800;
  line-height: 1.6;
}

.right-experience address small {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.doc-content {
  min-width: 0;
  padding: 50px 0 84px;
}

.doc-section {
  padding: 40px 0;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 86px;
}

.doc-section:first-child {
  padding-top: 0;
}

.doc-section:last-child {
  border-bottom: 0;
}

.section-label {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 20px;
  color: var(--ink);
  font-size: clamp(44px, 7vw, 78px);
  line-height: 0.98;
  letter-spacing: 0;
}

.join-page-title {
  max-width: 100%;
  font-size: clamp(34px, 3.4vw, 48px);
  line-height: 1.18;
  white-space: normal;
}

h2 {
  margin-bottom: 18px;
  color: var(--ink);
  font-size: 29px;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

h3 {
  margin-bottom: 10px;
  color: var(--ink);
  font-size: 17px;
  line-height: 1.4;
}

p,
li {
  color: var(--muted);
  line-height: 1.76;
}

.lead {
  max-width: 760px;
  font-size: 18px;
}

.logo-row {
  width: min(520px, 100%);
  aspect-ratio: 5.53 / 1;
  overflow: hidden;
  margin: 8px 0 18px;
}

.logo-row img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

blockquote {
  margin: 0 0 18px;
  padding-left: 16px;
  border-left: 3px solid var(--line-strong);
  color: var(--muted);
  font-size: 17px;
}

.action-grid,
.capability-grid,
.link-grid,
.feedback-panel {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 22px;
}

.action-grid a,
.action-grid div,
.capability-grid article,
.link-grid a,
.feedback-panel div,
.quick-steps li,
.flow-row div,
.faq-list details {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #ffffff;
}

.action-grid .value-card {
  position: relative;
  min-height: 148px;
  padding: 22px;
  border-color: var(--line-strong);
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
}

.action-grid .value-card::before {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  margin-bottom: 16px;
  border-radius: 10px;
  color: var(--green);
  font-size: 18px;
  font-weight: 900;
  background: #ecfdf5;
  content: "✓";
}

.action-grid a,
.action-grid div,
.link-grid a,
.feedback-panel div {
  display: grid;
  gap: 6px;
  padding: 18px;
}

.action-grid strong,
.link-grid strong,
.feedback-panel strong {
  display: block;
  color: var(--ink);
}

.action-grid span,
.link-grid span {
  display: block;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.value-grid {
  display: grid !important;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.value-grid .value-card {
  display: block;
  min-height: 150px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #ffffff;
}

.value-grid .value-card strong {
  display: block;
  margin-bottom: 10px;
  font-size: 18px;
  line-height: 1.35;
}

.value-grid .value-card span {
  display: block;
  font-size: 15px;
  line-height: 1.65;
}

.value-grid .value-card::before {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  margin-bottom: 16px;
  border-radius: 10px;
  color: var(--green);
  font-size: 18px;
  font-weight: 900;
  background: #ecfdf5;
  content: "✓";
}

.insight-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 22px;
}

.insight-grid article,
.compare-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #ffffff;
}

.insight-grid article {
  min-height: 156px;
  padding: 18px;
}

.insight-grid span {
  display: inline-grid;
  min-width: 34px;
  height: 28px;
  place-items: center;
  margin-bottom: 18px;
  border-radius: 8px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 900;
  background: var(--blue-soft);
}

.insight-grid p,
.compare-card li,
.compare-note {
  font-size: 16px;
}

.compare-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 22px;
}

.compare-card {
  padding: 22px;
}

.compare-card h3 {
  margin-bottom: 14px;
  font-size: 21px;
}

.compare-card ul {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.compare-card li {
  display: grid;
  grid-template-columns: 18px 1fr;
  gap: 8px;
  align-items: start;
  line-height: 1.55;
}

.muted-card li::before {
  color: #94a3b8;
  content: "–";
}

.highlight-card {
  border-color: #bbf7d0;
  background: linear-gradient(180deg, #f0fdf4 0%, #ffffff 100%);
}

.highlight-card li::before {
  color: var(--green);
  content: "✓";
}

.compare-note {
  margin: 18px 0 0;
  padding: 14px 16px;
  border-left: 3px solid var(--green);
  border-radius: 0 10px 10px 0;
  background: #f8fafc;
}

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

.feedback-panel p {
  margin-bottom: 10px;
  font-size: 14px;
  line-height: 1.6;
}

.feedback-panel a {
  width: max-content;
  margin-top: 4px;
  padding: 8px 11px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  font-size: 14px;
  font-weight: 800;
  background: var(--soft);
}

.feedback-panel a:hover {
  border-color: var(--line-strong);
}

.support-email {
  width: max-content;
  margin-top: 4px;
  padding: 8px 11px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  font-size: 14px;
  font-weight: 800;
  background: var(--soft);
}

.wechat-contact-card {
  align-content: start;
}

.wechat-contact-card img {
  display: block;
  width: min(180px, 100%);
  height: auto;
  margin-top: 4px;
  border-radius: 8px;
}

.check-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 18px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li::before {
  margin-right: 8px;
  color: var(--green);
  content: "✓";
}

.flow-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-top: 18px;
}

.flow-row div {
  padding: 16px;
}

.flow-row span,
.quick-steps > li > span {
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  margin-bottom: 12px;
  border-radius: 8px;
  color: var(--blue);
  font-weight: 900;
  background: var(--blue-soft);
}

.flow-row strong {
  display: block;
  color: var(--ink);
}

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

.capability-grid article {
  padding: 18px;
}

.capability-grid p {
  margin-bottom: 0;
  font-size: 14px;
}

.agent-solution-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 22px;
}

.agent-solution {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #ffffff;
}

.agent-solution:nth-child(2) {
  border-color: #bfdbfe;
}

.agent-solution:nth-child(3) {
  border-color: #a7f3d0;
}

.agent-label {
  margin-bottom: 14px;
  color: var(--blue);
  font-size: 14px;
  font-weight: 800;
}

.agent-solution h3 {
  margin-bottom: 12px;
  font-size: 23px;
}

.agent-solution h4 {
  margin: 22px 0 10px;
  color: var(--ink);
  font-size: 16px;
}

.agent-lead {
  margin-bottom: 0;
}

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

.agent-list li {
  display: grid;
  grid-template-columns: 16px 1fr;
  gap: 8px;
  font-size: 14px;
  line-height: 1.6;
}

.analysis-list li > div {
  display: grid;
  gap: 4px;
}

.analysis-list strong,
.analysis-list span {
  display: block;
}

.analysis-list strong {
  color: var(--ink);
}

.agent-list li::before {
  color: var(--blue);
  font-weight: 900;
  content: "•";
}

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

.agent-flow span {
  display: grid;
  min-height: 48px;
  place-items: center;
  padding: 8px 10px;
  border: 1px solid #bfdbfe;
  border-radius: 8px;
  color: #1d4ed8;
  font-size: 13px;
  font-weight: 750;
  line-height: 1.35;
  text-align: center;
  background: #f8fbff;
}

.quick-steps {
  display: grid;
  gap: 12px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.quick-steps li {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 14px;
  padding: 18px;
}

.quick-steps span {
  margin-bottom: 0;
}

.quick-steps strong {
  display: block;
  margin-bottom: 8px;
  color: var(--ink);
}

code,
pre {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

code {
  color: #334155;
  font-size: 13px;
}

pre {
  overflow-x: auto;
  margin: 18px 0 0;
  padding: 18px;
  border-radius: 12px;
  color: #dbeafe;
  background: var(--code);
}

pre code {
  color: inherit;
}

.dashboard-mock {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  min-height: 370px;
  overflow: hidden;
  margin-top: 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #ffffff;
}

.mock-sidebar {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  padding: 18px 0;
  border-right: 1px solid var(--line);
  background: var(--soft);
}

.mock-sidebar span {
  width: 30px;
  height: 30px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
}

.mock-sidebar span:first-child {
  background: var(--ink);
}

.mock-main {
  padding: 22px;
}

.mock-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.mock-topbar strong {
  color: var(--ink);
  font-size: 22px;
}

.mock-topbar span {
  padding: 6px 9px;
  border-radius: 999px;
  color: var(--green);
  font-size: 12px;
  font-weight: 800;
  background: #ecfdf5;
}

.mock-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 16px;
}

.mock-stats div,
.mock-table {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #ffffff;
}

.mock-stats div {
  padding: 13px;
}

.mock-stats span,
.mock-table span {
  display: block;
  color: var(--muted);
  font-size: 12px;
}

.mock-stats strong {
  display: block;
  margin-top: 6px;
  color: var(--ink);
  font-size: 25px;
}

.mock-table {
  overflow: hidden;
}

.mock-table div {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: center;
  min-height: 52px;
  padding: 0 14px;
  border-bottom: 1px solid var(--line);
}

.mock-table div:last-child {
  border-bottom: 0;
}

.mock-table strong {
  color: var(--ink);
  font-size: 13px;
}

.faq-list {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.faq-list summary {
  cursor: pointer;
  padding: 17px 19px;
  color: var(--ink);
  font-weight: 800;
}

.value-grid .value-card,
.insight-grid article,
.compare-card,
.feedback-panel > div,
.quick-steps li,
.faq-list details,
.dashboard-mock {
  border-radius: 14px;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.035);
}

.value-grid .value-card,
.compare-card,
.agent-solution,
.feedback-panel > div,
.quick-steps li,
.faq-list details {
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

.value-grid .value-card:hover,
.compare-card:hover,
.agent-solution:hover,
.feedback-panel > div:hover {
  border-color: var(--line-strong);
  box-shadow: 0 8px 22px rgba(15, 23, 42, 0.055);
}

.faq-list summary::marker {
  color: var(--blue);
}

.faq-list p {
  margin: 0;
  padding: 0 18px 18px;
}

.site-footer {
  max-width: 1380px;
  margin: 0 auto;
  padding: 22px 28px 30px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}

.site-footer a:hover {
  color: var(--blue);
}

@media (max-width: 1180px) {
  .docs-header {
    grid-template-columns: 1fr;
  }

  .docs-shell {
    grid-template-columns: 250px minmax(0, 1fr);
  }

  .toc {
    display: none;
  }

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

@media (max-width: 860px) {
  .docs-header {
    position: static;
    grid-template-columns: 1fr;
    height: auto;
    padding: 14px 18px;
  }

  .docs-shell {
    display: block;
    padding: 0 20px;
  }

  .sidebar {
    position: static;
    height: auto;
    margin: 0 -20px;
    padding: 14px 20px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .sidebar nav {
    display: flex;
    overflow-x: auto;
    gap: 6px;
  }

  .sidebar-title {
    display: none;
  }

  .sidebar a {
    flex: 0 0 auto;
  }

  .doc-content {
    padding-top: 32px;
  }

  .action-grid,
  .capability-grid,
  .link-grid,
  .feedback-panel,
  .insight-grid,
  .compare-grid,
  .agent-solution-grid,
  .value-grid,
  .flow-row {
    grid-template-columns: 1fr;
  }

  .agent-lead {
    min-height: 0;
  }

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

@media (max-width: 620px) {
  .brand {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }

  .brand-tagline {
    padding-left: 0;
    border-left: 0;
    font-size: 13px;
    white-space: normal;
  }

  .top-links a {
    display: none;
  }

  h1 {
    font-size: 42px;
  }

  .quick-steps li,
  .dashboard-mock {
    grid-template-columns: 1fr;
  }

  .mock-sidebar {
    flex-direction: row;
    justify-content: center;
    padding: 12px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .mock-stats {
    grid-template-columns: 1fr;
  }

  .mock-table div {
    grid-template-columns: 1fr;
    gap: 4px;
    padding: 12px 14px;
  }
}