/* AI 工作流自动化指南 - 样式表 */
:root {
  --primary: #7c3aed;
  --primary-light: #a78bfa;
  --primary-dark: #5b21b6;
  --primary-bg: #f5f3ff;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --success: #059669;
  --success-bg: #ecfdf5;
  --warning: #d97706;
  --warning-bg: #fffbeb;
  --danger: #dc2626;
  --danger-bg: #fef2f2;
  --info: #2563eb;
  --info-bg: #eff6ff;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
  color: var(--gray-800);
  line-height: 1.7;
  background: #fff;
}

a { color: var(--primary); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--primary-dark); }

.container { max-width: 1320px; margin: 0 auto; padding: 0 24px; }

/* Header */
.site-header {
  background: #fff;
  border-bottom: 1px solid var(--gray-200);
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.site-logo {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
}
.site-nav { display: flex; gap: 24px; align-items: center; }
.site-nav a { color: var(--gray-600); font-size: 15px; font-weight: 500; }
.site-nav a:hover { color: var(--primary); }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 20px; height: 2px; background: var(--gray-700); margin: 5px 0; transition: 0.3s; }

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--primary-bg) 0%, #ede9fe 50%, #ddd6fe 100%);
  padding: 80px 0;
  text-align: center;
}
.hero h1 { font-size: 42px; font-weight: 800; color: var(--gray-900); margin-bottom: 16px; }
.hero p { font-size: 18px; color: var(--gray-600); max-width: 600px; margin: 0 auto 32px; }
.hero-stats { display: flex; justify-content: center; gap: 48px; margin-top: 32px; }
.hero-stat { text-align: center; }
.hero-stat-number { font-size: 32px; font-weight: 700; color: var(--primary); }
.hero-stat-label { font-size: 14px; color: var(--gray-500); margin-top: 4px; }

/* Sections */
.section { padding: 64px 0; }
.section-title { font-size: 24px; font-weight: 700; color: var(--gray-900); margin-bottom: 24px; }
.section-desc { font-size: 15px; color: var(--gray-600); margin-bottom: 32px; }

/* Category Cards */
.category-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px; }
.category-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 24px;
  transition: all 0.2s;
  display: block;
  color: inherit;
}
.category-card:hover { border-color: var(--primary-light); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.category-card-icon { font-size: 32px; margin-bottom: 12px; }
.category-card-name { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.category-card-desc { font-size: 14px; color: var(--gray-500); margin-bottom: 12px; }
.category-card-count { font-size: 13px; color: var(--primary); font-weight: 500; }

/* Workflow Cards */
.workflow-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 20px; }
.workflow-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 24px;
  transition: all 0.2s;
  display: block;
  color: inherit;
}
.workflow-card:hover { border-color: var(--primary-light); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.workflow-card-header { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.workflow-card-title { font-size: 16px; font-weight: 600; color: var(--gray-900); }
.workflow-card-desc { font-size: 14px; color: var(--gray-500); margin-bottom: 16px; line-height: 1.6; }
.workflow-card-meta { display: flex; flex-wrap: wrap; gap: 8px; }

/* Tags */
.tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
}
.tag-difficulty-入门 { background: var(--success-bg); color: var(--success); }
.tag-difficulty-中级 { background: var(--warning-bg); color: var(--warning); }
.tag-difficulty-进阶 { background: var(--danger-bg); color: var(--danger); }
.tag-platform { background: var(--primary-bg); color: var(--primary); }
.tag-time { background: var(--info-bg); color: var(--info); }

/* Platform Cards */
.platform-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 20px; }
.platform-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 24px;
  transition: all 0.2s;
  display: block;
  color: inherit;
}
.platform-card:hover { border-color: var(--primary-light); box-shadow: var(--shadow-md); }
.platform-card-name { font-size: 20px; font-weight: 700; margin-bottom: 8px; color: var(--gray-900); }
.platform-card-desc { font-size: 14px; color: var(--gray-500); margin-bottom: 16px; }
.platform-card-price { font-size: 13px; color: var(--primary); font-weight: 500; }

/* Guide Cards */
.guide-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 20px; }
.guide-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 24px;
  transition: all 0.2s;
  display: block;
  color: inherit;
}
.guide-card:hover { border-color: var(--primary-light); box-shadow: var(--shadow-md); }
.guide-card-title { font-size: 18px; font-weight: 600; margin-bottom: 8px; color: var(--gray-900); }
.guide-card-desc { font-size: 14px; color: var(--gray-500); }

/* Workflow Detail */
.workflow-detail { padding: 48px 0; }
.workflow-detail h1 { font-size: 28px; font-weight: 700; margin-bottom: 12px; }
.workflow-detail-meta { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 32px; }

/* Steps */
.steps-list { list-style: none; padding: 0; margin: 0 0 32px; }
.steps-list li {
  position: relative;
  padding: 16px 16px 16px 60px;
  margin-bottom: 12px;
  background: var(--gray-50);
  border-radius: var(--radius-sm);
  font-size: 15px;
  line-height: 1.6;
}
.steps-list li::before {
  content: attr(data-step);
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
}

/* Info Box */
.info-box {
  background: var(--primary-bg);
  border: 1px solid #ddd6fe;
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 24px;
}
.info-box h3 { font-size: 15px; font-weight: 600; margin-bottom: 8px; color: var(--primary-dark); }
.info-box p, .info-box li { font-size: 14px; color: var(--gray-700); }
.info-box ul { padding-left: 20px; margin-top: 8px; }

/* Tools List */
.tools-list { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; }
.tool-badge {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 20px;
  padding: 6px 14px;
  font-size: 13px;
  color: var(--gray-700);
}

/* Platform Detail */
.platform-detail { padding: 48px 0; }
.platform-detail h1 { font-size: 28px; font-weight: 700; margin-bottom: 16px; }
.pricing-table { width: 100%; border-collapse: collapse; margin-bottom: 32px; }
.pricing-table th, .pricing-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--gray-200);
  font-size: 14px;
}
.pricing-table th { background: var(--gray-50); font-weight: 600; color: var(--gray-700); }
.pricing-table td:first-child { font-weight: 500; }

.feature-list { list-style: none; padding: 0; }
.feature-list li {
  padding: 8px 0 8px 24px;
  position: relative;
  font-size: 14px;
  color: var(--gray-700);
}
.feature-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--success);
  font-weight: 700;
}
.limitation-list li::before { content: "✗"; color: var(--danger); }

/* Guide Detail */
.guide-detail { padding: 48px 0; }
.guide-detail h1 { font-size: 28px; font-weight: 700; margin-bottom: 12px; }
.guide-content { max-width: 800px; }
.guide-content h2 { font-size: 20px; font-weight: 600; margin: 32px 0 12px; color: var(--gray-900); }
.guide-content p { font-size: 15px; color: var(--gray-700); margin-bottom: 16px; line-height: 1.8; }

/* Breadcrumb */
.breadcrumb {
  padding: 12px 0;
  font-size: 13px;
  color: var(--gray-400);
  border-bottom: 1px solid var(--gray-100);
}
.breadcrumb a { color: var(--gray-500); }
.breadcrumb span { margin: 0 8px; }

/* Filter Bar */
.filter-bar { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 24px; }
.filter-btn {
  padding: 8px 16px;
  border: 1px solid var(--gray-200);
  border-radius: 20px;
  background: #fff;
  font-size: 13px;
  color: var(--gray-600);
  cursor: pointer;
  transition: all 0.2s;
}
.filter-btn:hover { border-color: var(--primary-light); color: var(--primary); }
.filter-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* Footer */
.site-footer {
  background: var(--gray-900);
  color: var(--gray-300);
  padding: 48px 0 24px;
  margin-top: 64px;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 32px; }
.footer-brand p { font-size: 14px; margin-top: 8px; color: var(--gray-400); }
.footer-links h4 { color: #fff; font-size: 14px; margin-bottom: 12px; }
.footer-links ul { list-style: none; }
.footer-links li { margin-bottom: 8px; }
.footer-links a { color: var(--gray-400); font-size: 13px; }
.footer-links a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid var(--gray-700); padding-top: 24px; font-size: 13px; color: var(--gray-500); }

/* Responsive */
@media (max-width: 768px) {
  .hero { padding: 48px 0; }
  .hero h1 { font-size: 28px; }
  .hero p { font-size: 16px; }
  .hero-stats { gap: 24px; }
  .hero-stat-number { font-size: 24px; }
  .section { padding: 40px 0; }
  .category-grid, .workflow-grid, .platform-grid, .guide-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .site-nav { display: none; }
  .site-nav.open { display: flex; flex-direction: column; position: absolute; top: 64px; left: 0; right: 0; background: #fff; padding: 16px 24px; border-bottom: 1px solid var(--gray-200); box-shadow: var(--shadow-md); }
  .nav-toggle { display: block; }
  .filter-bar { gap: 8px; }
  .filter-btn { padding: 6px 12px; font-size: 12px; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .footer-grid { grid-template-columns: 1fr; }
  .workflow-detail-meta { flex-direction: column; gap: 8px; }
}

/* Comparison Pages */
.compare-detail { padding: 40px 0; }
.compare-table-wrap { overflow-x: auto; margin-bottom: 32px; }
.compare-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.compare-table th, .compare-table td { padding: 12px 16px; border: 1px solid var(--gray-200); text-align: left; }
.compare-table th { background: var(--gray-50); font-weight: 600; white-space: nowrap; }
.compare-table .score-cell { min-width: 100px; }
.score-bar { display: inline-block; background: var(--primary-bg); color: var(--primary); padding: 2px 8px; border-radius: 4px; font-size: 12px; font-weight: 600; }
.compare-scenarios { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin: 24px 0; }
.compare-scenario-col { background: var(--gray-50); padding: 20px 24px; border-radius: var(--radius); }
.compare-scenario-col h3 { font-size: 15px; margin-bottom: 12px; }
.compare-scenario-col ul { list-style: none; padding: 0; }
.compare-scenario-col li { padding: 6px 0; padding-left: 20px; position: relative; font-size: 14px; color: var(--gray-600); }
.compare-scenario-col li::before { content: "✓"; position: absolute; left: 0; color: var(--success); font-weight: 700; }
.compare-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px; }
.compare-card { display: block; padding: 20px 24px; background: #fff; border: 1px solid var(--gray-200); border-radius: var(--radius); transition: all 0.2s; }
.compare-card:hover { border-color: var(--primary-light); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.compare-card-title { font-size: 16px; font-weight: 600; color: var(--gray-800); margin-bottom: 8px; }
.compare-card-desc { font-size: 13px; color: var(--gray-500); }

/* Industry Pages */
.industry-detail { padding: 40px 0; }
.pain-points { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; margin-bottom: 32px; }
.pain-point-card { padding: 16px 20px; background: var(--danger-bg); border: 1px solid #fecaca; border-radius: var(--radius-sm); }
.pain-point-card p { font-size: 14px; color: var(--gray-700); }
.implementation-timeline { margin-bottom: 32px; }
.timeline-step { display: grid; grid-template-columns: 80px 1fr 1fr; gap: 16px; padding: 16px 0; border-bottom: 1px solid var(--gray-100); align-items: center; }
.timeline-phase { font-weight: 700; color: var(--primary); font-size: 14px; }
.timeline-action { font-size: 14px; color: var(--gray-700); }
.timeline-impact { font-size: 13px; color: var(--success); font-weight: 500; }
.roi-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 32px; }
.roi-card { text-align: center; padding: 20px 16px; background: var(--success-bg); border-radius: var(--radius); }
.roi-label { font-size: 13px; color: var(--gray-500); margin-bottom: 8px; }
.roi-value { font-size: 14px; font-weight: 600; color: var(--gray-800); }
.industry-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 20px; }
.industry-card { display: block; padding: 24px; background: #fff; border: 1px solid var(--gray-200); border-radius: var(--radius); text-align: center; transition: all 0.2s; }
.industry-card:hover { border-color: var(--primary-light); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.industry-card-icon { font-size: 32px; margin-bottom: 8px; }
.industry-card-title { font-size: 15px; font-weight: 600; color: var(--gray-800); margin-bottom: 6px; }
.industry-card-desc { font-size: 13px; color: var(--gray-500); }

/* Footer 5-col */
@media (min-width: 769px) {
  .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr 1fr; }
}

/* Responsive additions */
@media (max-width: 768px) {
  .compare-scenarios { grid-template-columns: 1fr; }
  .timeline-step { grid-template-columns: 1fr; gap: 4px; }
  .roi-grid { grid-template-columns: 1fr; }
  .compare-grid, .industry-grid { grid-template-columns: 1fr; }
}

/* Detailed Guide */
.detailed-guide { margin-bottom: 32px; }
.guide-section { padding: 20px 24px; margin-bottom: 16px; background: var(--gray-50); border-radius: var(--radius); border-left: 4px solid var(--primary); }
.guide-section-title { font-size: 16px; font-weight: 600; color: var(--gray-800); margin-bottom: 8px; display: flex; align-items: center; gap: 10px; }
.guide-step-num { display: inline-flex; align-items: center; justify-content: center; width: 24px; height: 24px; background: var(--primary); color: #fff; border-radius: 50%; font-size: 12px; font-weight: 700; flex-shrink: 0; }
.guide-section-content { font-size: 14px; color: var(--gray-600); line-height: 1.8; }

/* Metrics */
.metrics-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; margin-bottom: 32px; }
.metric-item { display: flex; align-items: center; gap: 8px; padding: 12px 16px; background: var(--info-bg); border-radius: var(--radius-sm); font-size: 14px; color: var(--gray-700); }
.metric-icon { font-size: 16px; }

/* FAQ */
.faq-list { margin-bottom: 32px; }
.faq-item { border: 1px solid var(--gray-200); border-radius: var(--radius-sm); margin-bottom: 8px; overflow: hidden; }
.faq-item[open] { border-color: var(--primary-light); }
.faq-question { padding: 14px 20px; font-size: 15px; font-weight: 500; color: var(--gray-800); cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between; }
.faq-question::-webkit-details-marker { display: none; }
.faq-question::after { content: "+"; font-size: 18px; color: var(--gray-400); transition: transform 0.2s; }
.faq-item[open] .faq-question::after { content: "−"; color: var(--primary); }
.faq-answer { padding: 0 20px 16px; font-size: 14px; color: var(--gray-600); line-height: 1.8; }

/* Use Case List */
.use-case-list { margin-bottom: 32px; }
.use-case-item { padding: 16px 20px; border: 1px solid var(--gray-200); border-radius: var(--radius-sm); margin-bottom: 10px; }
.use-case-title { font-size: 15px; font-weight: 600; color: var(--gray-800); margin-bottom: 6px; display: flex; align-items: center; gap: 8px; }
.use-case-desc { font-size: 14px; color: var(--gray-600); line-height: 1.7; }

/* Language Switcher */
.lang-switch { margin-left: auto; display: flex; gap: 8px; align-items: center; }
.lang-switch a { font-size: 14px; color: var(--gray-500); text-decoration: none; padding: 4px 8px; border-radius: 4px; border: 1px solid transparent; }
.lang-switch a:hover { border-color: var(--primary); }
.lang-switch a.active { color: var(--primary); font-weight: 600; border-color: var(--primary); }