/* ========================================
   Human Gates — Design System
   Style: 飞书/企业微信 中文商务风
   ======================================== */

/* --- Reset & Base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #1a56db;
  --primary-hover: #1e40af;
  --primary-light: #eff6ff;
  --accent: #0d9488;
  --accent-light: #f0fdfa;
  --success: #059669;
  --warning: #d97706;
  --danger: #dc2626;
  --text: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --bg: #ffffff;
  --bg-light: #f8fafc;
  --bg-section: #f1f5f9;
  --border: #e2e8f0;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --shadow: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,.07), 0 2px 4px -2px rgba(0,0,0,.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,.08), 0 4px 6px -4px rgba(0,0,0,.04);
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --mono: "SF Mono", "Fira Code", "JetBrains Mono", "Source Code Pro", monospace;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  font-size: 16px;
}

/* --- Typography --- */
h1, h2, h3, h4 {
  line-height: 1.3;
  font-weight: 600;
  letter-spacing: -0.02em;
}

h1 { font-size: 2.75rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.1rem; }

p { color: var(--text-secondary); line-height: 1.7; }

.section-title {
  text-align: center;
  margin-bottom: 0.75rem;
}
.section-subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 560px;
  margin: 0 auto 3rem;
}

/* --- Container --- */
.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Navbar --- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.navbar .logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--text);
}
.navbar .logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.1rem;
  font-weight: 700;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}
.nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color .2s;
}
.nav-links a:hover,
.nav-links a.active { color: var(--primary); }
.nav-cta {
  padding: 8px 20px;
  background: var(--primary);
  color: white !important;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: background .2s, transform .1s;
}
.nav-cta:hover { background: var(--primary-hover); transform: translateY(-1px); }

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text);
  cursor: pointer;
  padding: 4px;
}

/* --- Hero --- */
.hero {
  padding: 80px 0 64px;
  text-align: center;
  background: linear-gradient(180deg, var(--primary-light) 0%, var(--bg) 60%);
}
.hero h1 {
  max-width: 720px;
  margin: 0 auto 1rem;
  background: linear-gradient(135deg, var(--text), var(--primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero p {
  max-width: 560px;
  margin: 0 auto 2rem;
  font-size: 1.15rem;
}
.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: all .2s;
  cursor: pointer;
  border: none;
}
.btn-primary {
  background: var(--primary);
  color: white;
}
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-secondary {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--bg-light); border-color: var(--text-muted); }

/* --- Sections --- */
.section {
  padding: 72px 0;
}
.section-alt {
  background: var(--bg-light);
}

/* --- Steps / 步骤图 --- */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  position: relative;
}
.step-card {
  text-align: center;
  padding: 32px 20px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  position: relative;
}
.step-number {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white;
  font-weight: 700;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}
.step-card h3 { margin-bottom: 8px; }
.step-card p { font-size: 0.92rem; }

/* --- Features Grid --- */
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  padding: 28px 24px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: box-shadow .2s, transform .2s;
}
.feature-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 14px;
}
.feature-card h3 { margin-bottom: 8px; font-size: 1.1rem; }
.feature-card p { font-size: 0.92rem; color: var(--text-muted); }

/* --- Use Cases --- */
.use-cases {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.use-case {
  padding: 24px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: flex-start;
  gap: 14px;
}
.use-case-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}
.use-case h4 { margin-bottom: 4px; }
.use-case p { font-size: 0.88rem; color: var(--text-muted); }

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--border);
  padding: 48px 0 32px;
  background: var(--bg-light);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}
.footer-brand .logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 12px;
}
.footer-brand p { font-size: 0.9rem; color: var(--text-muted); max-width: 260px; }
.footer-col h4 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text);
}
.footer-col a {
  display: block;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  margin-bottom: 10px;
  transition: color .2s;
}
.footer-col a:hover { color: var(--primary); }
.footer-bottom {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ========================================
   API Docs Page
   ======================================== */
.doc-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 40px;
  padding: 48px 0;
}
.doc-sidebar {
  position: sticky;
  top: 80px;
  align-self: start;
}
.doc-sidebar h4 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.doc-sidebar a {
  display: block;
  padding: 6px 0;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.92rem;
  transition: color .2s;
}
.doc-sidebar a:hover,
.doc-sidebar a.active { color: var(--primary); }
.doc-content h2 {
  margin-top: 48px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.doc-content h2:first-child { margin-top: 0; }
.doc-content h3 {
  margin-top: 32px;
  margin-bottom: 12px;
}
.doc-content p { margin-bottom: 16px; }

/* --- Code Blocks --- */
pre {
  background: #0f172a;
  color: #e2e8f0;
  padding: 20px 24px;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.88rem;
  line-height: 1.6;
  margin: 16px 0 24px;
}
code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--bg-light);
  padding: 2px 6px;
  border-radius: 4px;
}
pre code {
  background: none;
  padding: 0;
  border-radius: 0;
}

/* --- Endpoint cards --- */
.endpoint {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  overflow: hidden;
}
.endpoint-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  background: var(--bg-light);
  border-bottom: 1px solid var(--border);
  cursor: pointer;
}
.endpoint-method {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 4px;
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.03em;
  color: white;
}
.method-post { background: var(--success); }
.method-get { background: var(--primary); }
.method-put { background: var(--warning); }
.endpoint-path {
  font-family: var(--mono);
  font-size: 0.92rem;
  font-weight: 500;
}
.endpoint-desc {
  margin-left: auto;
  font-size: 0.88rem;
  color: var(--text-muted);
}
.endpoint-body {
  padding: 20px;
  display: none;
}
.endpoint.open .endpoint-body { display: block; }

/* --- Tables --- */
.doc-table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0 24px;
  font-size: 0.92rem;
}
.doc-table th {
  text-align: left;
  padding: 10px 14px;
  background: var(--bg-light);
  font-weight: 600;
  border-bottom: 2px solid var(--border);
}
.doc-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
}
.doc-table tr:last-child td { border-bottom: none; }

/* ========================================
   Pricing Page
   ======================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 900px;
  margin: 0 auto;
}
.pricing-card {
  padding: 32px 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
  background: var(--bg);
  transition: box-shadow .2s, transform .2s;
}
.pricing-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.pricing-card.featured {
  border-color: var(--primary);
  box-shadow: 0 0 0 1px var(--primary);
}
.pricing-card h3 { font-size: 1.1rem; margin-bottom: 4px; }
.pricing-card .type-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}
.pricing-card .price {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 4px;
}
.pricing-card .price-note {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}
.pricing-card ul {
  list-style: none;
  text-align: left;
  margin-bottom: 24px;
}
.pricing-card li {
  padding: 6px 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
}
.pricing-card li::before {
  content: "✓";
  color: var(--success);
  font-weight: 700;
}

/* --- Contact / CTA Banner --- */
.cta-banner {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: var(--radius-lg);
  padding: 56px;
  text-align: center;
  color: white;
  margin-top: 48px;
}
.cta-banner h2 { color: white; margin-bottom: 12px; }
.cta-banner p { color: rgba(255,255,255,.85); margin-bottom: 24px; max-width: 480px; margin-left: auto; margin-right: auto; }
.cta-banner .btn { background: white; color: var(--primary); }
.cta-banner .btn:hover { background: rgba(255,255,255,.9); }

/* --- Status Badge --- */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 500;
}
.status-badge-live {
  background: var(--accent-light);
  color: var(--accent);
}
.status-badge-live::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ========================================
   New Homepage Sections
   ======================================== */

/* --- Gap Section (鸿沟对比) --- */
.gap-grid {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.gap-card {
  flex: 1;
  min-width: 240px;
  max-width: 340px;
  padding: 28px 32px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.gap-ai { background: #f0fdf4; border-color: #bbf7d0; }
.gap-human { background: #fef2f2; border-color: #fecaca; }
.gap-label {
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(0,0,0,.08);
}
.gap-ai .gap-label { color: #16a34a; }
.gap-human .gap-label { color: #dc2626; }
.gap-card ul {
  list-style: none;
}
.gap-card li {
  padding: 6px 0;
  font-size: 0.92rem;
  color: var(--text-secondary);
}
.gap-arrow {
  font-size: 2rem;
  color: var(--text-muted);
  font-weight: 300;
  flex-shrink: 0;
}
.gap-bridge {
  text-align: center;
  margin-top: 8px;
}
.gap-bridge-label {
  display: inline-block;
  padding: 8px 24px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white;
  border-radius: 20px;
  font-size: 0.92rem;
  font-weight: 600;
}

/* --- Platform Flow (平台模式) --- */
.platform-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}
.flow-node {
  text-align: center;
  padding: 20px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  min-width: 130px;
  background: var(--bg);
  transition: box-shadow .2s, transform .2s;
}
.flow-node:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.flow-icon {
  font-size: 1.8rem;
  margin-bottom: 8px;
}
.flow-label {
  font-size: 0.85rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text);
}
.flow-label span {
  font-weight: 400;
  font-size: 0.78rem;
  color: var(--text-muted);
}
.flow-node-api { border-color: #93c5fd; }
.flow-node-ops { border-color: #fcd34d; }
.flow-node-provider { border-color: #a7f3d0; }
.flow-node-done { border-color: #6ee7b7; }
.flow-connector {
  font-size: 1.4rem;
  color: var(--text-muted);
  font-weight: 300;
  flex-shrink: 0;
}
.platform-note {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
  background: var(--accent-light);
  border: 1px solid #99f6e4;
  border-radius: var(--radius-sm);
  padding: 16px 24px;
}
.platform-note p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin: 0;
}

/* --- Blueprint Grid (服务蓝图) --- */
.blueprint-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 28px;
}
.blueprint-card {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  transition: box-shadow .2s, transform .2s;
}
.blueprint-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.blueprint-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}
.blueprint-header h3 {
  font-size: 1rem;
  margin: 0;
}
.blueprint-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 10px;
  font-size: 0.72rem;
  font-weight: 600;
  flex-shrink: 0;
}
.blueprint-live .blueprint-badge {
  background: #dcfce7;
  color: #16a34a;
}
.blueprint-coming .blueprint-badge {
  background: #dbeafe;
  color: #2563eb;
}
.blueprint-planning .blueprint-badge {
  background: #f3f4f6;
  color: #9ca3af;
}
.blueprint-card p {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  line-height: 1.5;
}
.blueprint-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.blueprint-tags span {
  display: inline-block;
  padding: 2px 8px;
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.75rem;
  color: var(--text-secondary);
}
.blueprint-footnote {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  max-width: 600px;
  margin: 0 auto;
}

/* --- Developer Message (写给开发者) --- */
.dev-message {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  max-width: 960px;
  margin: 0 auto;
}
.dev-code pre {
  margin: 0;
  font-size: 0.82rem;
}
.dev-text h3 {
  margin-bottom: 16px;
}
.dev-text ul {
  list-style: none;
  margin-bottom: 24px;
}
.dev-text li {
  padding: 6px 0;
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.5;
}
.dev-text li strong {
  color: var(--text);
  font-weight: 600;
}

/* --- Supplier Section (致服务商) --- */
.supplier-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 800px;
  margin: 0 auto 24px;
}
.supplier-card {
  text-align: center;
  padding: 32px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
}
.supplier-icon {
  font-size: 2.2rem;
  margin-bottom: 12px;
}
.supplier-card h3 {
  margin-bottom: 8px;
  font-size: 1.05rem;
}
.supplier-card p {
  font-size: 0.88rem;
  color: var(--text-muted);
}
.supplier-cta {
  text-align: center;
  font-size: 0.92rem;
  color: var(--text-muted);
  background: var(--bg-light);
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 20px;
  max-width: 500px;
  margin: 0 auto;
}

/* --- Mobile --- */
@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }

  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px;
    gap: 16px;
    align-items: flex-start;
  }
  .nav-links.open { display: flex; }
  .mobile-toggle { display: block; }

  .hero { padding: 48px 0 40px; }
  .steps { grid-template-columns: 1fr; gap: 20px; }
  .features { grid-template-columns: 1fr; }
  .use-cases { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; max-width: 400px; }
  .doc-layout { grid-template-columns: 1fr; }
  .doc-sidebar { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .cta-banner { padding: 40px 24px; }
  .blueprint-grid { grid-template-columns: 1fr; }
  .dev-message { grid-template-columns: 1fr; }
  .supplier-grid { grid-template-columns: 1fr; }
  .gap-arrow { display: none; }
  .platform-flow { gap: 12px; }
  .flow-node { min-width: 100px; padding: 14px 10px; }
  .flow-connector { font-size: 1rem; }
}

@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
}