/* ============================================
   智推纪元 B端官网样式系统 V1.0
   geoooo.top - GEO优化招商/代工/引擎软件
   品牌视觉：深蓝科技 + 金色强调 + 暗色高级感
   ============================================ */

/* CSS变量 - 设计系统 */
:root {
  /* 主色 - 深蓝科技 */
  --primary-deep: #0A1628;
  --primary-navy: #0F2847;
  --primary-blue: #1E40AF;
  --primary-blue-light: #3B82F6;
  --primary-blue-glow: rgba(59, 130, 246, 0.15);

  /* 强调色 - 金色 */
  --accent-gold: #D4A843;
  --accent-gold-light: #F0D78C;
  --accent-gold-glow: rgba(212, 168, 67, 0.2);

  /* 背景 */
  --bg-dark: #0A1628;
  --bg-navy: #0F2847;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-card-hover: rgba(255, 255, 255, 0.06);
  --bg-glass: rgba(15, 40, 71, 0.6);
  --bg-light: #F8FAFC;

  /* 文字 */
  --text-white: #FFFFFF;
  --text-primary: #E8EDF5;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --text-gold: #D4A843;

  /* 边框 */
  --border-light: rgba(255, 255, 255, 0.08);
  --border-gold: rgba(212, 168, 67, 0.3);

  /* 阴影 */
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.15);
  --shadow-gold: 0 0 30px rgba(212, 168, 67, 0.2);

  /* 其他 */
  --radius: 12px;
  --radius-lg: 20px;
  --radius-sm: 8px;
  --transition: color .2s ease, background-color .2s ease, border-color .2s ease, box-shadow .2s ease, transform .2s ease, opacity .2s ease;
}

/* 重置 */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* 背景装饰 - 网格 + 光晕 */
body::before {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background:
    radial-gradient(ellipse 800px 600px at 20% 10%, rgba(59, 130, 246, 0.08), transparent),
    radial-gradient(ellipse 600px 500px at 80% 80%, rgba(212, 168, 67, 0.06), transparent);
  pointer-events: none;
  z-index: 0;
}

/* 容器 */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; position: relative; z-index: 1; }
.container-narrow { max-width: 900px; margin: 0 auto; padding: 0 24px; position: relative; z-index: 1; }

/* ========== 导航栏 ========== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(10, 22, 40, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px;
}
.logo {
  display: flex; align-items: center; gap: 12px;
}
.logo img { width: 44px; height: 44px; border-radius: 0; object-fit: contain; }
.logo-title {
  font-size: 1.25rem; font-weight: 700; color: var(--text-white);
  letter-spacing: 1px;
}
.logo-sub {
  font-size: 0.7rem; color: var(--text-gold);
  letter-spacing: 2px; text-transform: uppercase;
}
.nav-links {
  display: flex; align-items: center; gap: 8px;
}
.nav-links a {
  padding: 8px 16px; border-radius: var(--radius-sm);
  font-size: 0.9rem; color: var(--text-secondary);
  transition: var(--transition);
}
.nav-links a:hover, .nav-links a.active {
  color: var(--text-white);
  background: var(--bg-card-hover);
}
.nav-cta {
  padding: 10px 24px !important;
  background: linear-gradient(135deg, var(--accent-gold), var(--accent-gold-light));
  color: var(--bg-dark) !important;
  font-weight: 600;
  border-radius: var(--radius-sm);
}
.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-gold);
}

/* ========== Hero区 ========== */
.hero {
  padding: 160px 0 100px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 800px; height: 800px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.1), transparent 70%);
  pointer-events: none;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 20px;
  background: var(--primary-blue-glow);
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: 50px;
  font-size: 0.85rem; color: var(--primary-blue-light);
  margin-bottom: 28px;
}
.hero-badge i { color: var(--accent-gold); }
.hero h1 {
  font-size: 3.2rem; font-weight: 800;
  line-height: 1.2; color: var(--text-white);
  margin-bottom: 24px;
}
.hero h1 .highlight {
  background: linear-gradient(135deg, var(--accent-gold), var(--accent-gold-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 1.15rem; color: var(--text-secondary);
  max-width: 680px; margin-bottom: 40px;
  line-height: 1.8;
}
.hero-buttons {
  display: flex; gap: 16px; flex-wrap: wrap;
  margin-bottom: 60px;
}
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-size: 1rem; font-weight: 600;
  cursor: pointer; border: none;
  transition: var(--transition);
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent-gold), #C49A35);
  color: var(--bg-dark);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-gold);
}
.btn-secondary {
  background: var(--bg-card);
  color: var(--text-white);
  border: 1px solid var(--border-light);
}
.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--primary-blue-light);
}
.btn-outline {
  background: transparent;
  color: var(--primary-blue-light);
  border: 1px solid var(--primary-blue-light);
}
.btn-outline:hover {
  background: var(--primary-blue-glow);
}

/* Hero数据统计 */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  padding-top: 40px;
  border-top: 1px solid var(--border-light);
}
.stat-item .stat-num {
  font-size: 2.2rem; font-weight: 800;
  color: var(--text-white);
  line-height: 1;
}
.stat-item .stat-num .unit {
  font-size: 1rem; color: var(--accent-gold);
  margin-left: 4px;
}
.stat-item .stat-label {
  font-size: 0.85rem; color: var(--text-muted);
  margin-top: 8px;
}

/* ========== 通用区块 ========== */
.section {
  padding: 100px 0;
  position: relative;
}
.section-header {
  text-align: center;
  margin-bottom: 60px;
}
.section-tag {
  display: inline-block;
  padding: 6px 18px;
  background: var(--primary-blue-glow);
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: 50px;
  font-size: 0.8rem; color: var(--primary-blue-light);
  letter-spacing: 1px;
  margin-bottom: 16px;
}
.section-title {
  font-size: 2.2rem; font-weight: 700;
  color: var(--text-white);
  margin-bottom: 16px;
}
.section-desc {
  font-size: 1.05rem; color: var(--text-secondary);
  max-width: 700px; margin: 0 auto;
}

/* ========== 三大业务卡片 ========== */
.business-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.business-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.business-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-blue-light), var(--accent-gold));
  opacity: 0;
  transition: var(--transition);
}
.business-card:hover {
  transform: translateY(-6px);
  background: var(--bg-card-hover);
  border-color: var(--primary-blue-light);
  box-shadow: var(--shadow-glow);
}
.business-card:hover::before { opacity: 1; }
.business-icon {
  width: 60px; height: 60px;
  display: flex; align-items: center; justify-content: center;
  background: var(--primary-blue-glow);
  border-radius: 16px;
  font-size: 1.6rem; color: var(--primary-blue-light);
  margin-bottom: 24px;
}
.business-card.gold .business-icon {
  background: var(--accent-gold-glow);
  color: var(--accent-gold);
}
.business-title {
  font-size: 1.35rem; font-weight: 700;
  color: var(--text-white);
  margin-bottom: 12px;
}
.business-desc {
  font-size: 0.95rem; color: var(--text-secondary);
  margin-bottom: 24px;
  line-height: 1.7;
}
.business-features {
  display: flex; flex-direction: column; gap: 10px;
  margin-bottom: 28px;
}
.business-features li {
  display: flex; align-items: center; gap: 10px;
  font-size: 0.88rem; color: var(--text-secondary);
}
.business-features li i { color: var(--accent-gold); font-size: 0.75rem; }
.business-link {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--primary-blue-light);
  font-size: 0.9rem; font-weight: 600;
}
.business-link:hover { gap: 12px; }

/* ========== 技术架构 ========== */
.tech-arch {
  background: var(--bg-navy);
  border-radius: var(--radius-lg);
  padding: 50px;
  border: 1px solid var(--border-light);
}
.arch-layer {
  display: flex; align-items: stretch;
  margin-bottom: 16px;
  border-radius: var(--radius);
  overflow: hidden;
}
.arch-layer:last-child { margin-bottom: 0; }
.arch-layer-label {
  width: 160px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.9rem; font-weight: 600;
  color: var(--text-white);
  padding: 20px;
}
.arch-layer.content .arch-layer-label { background: linear-gradient(135deg, #1E40AF, #3B82F6); }
.arch-layer.adapt .arch-layer-label { background: linear-gradient(135deg, #7C3AED, #A78BFA); }
.arch-layer.data .arch-layer-label { background: linear-gradient(135deg, #059669, #34D399); }
.arch-layer.infra .arch-layer-label { background: linear-gradient(135deg, #B45309, #FBBF24); }
.arch-layer-content {
  flex: 1;
  display: flex; flex-wrap: wrap; gap: 12px;
  padding: 20px 24px;
  background: var(--bg-card);
  align-items: center;
}
.arch-tag {
  padding: 8px 16px;
  background: var(--bg-card-hover);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  font-size: 0.85rem; color: var(--text-primary);
}

/* ========== 引擎矩阵 ========== */
.engine-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
}
.engine-item {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 16px 12px;
  text-align: center;
  transition: var(--transition);
}
.engine-item:hover {
  background: var(--bg-card-hover);
  border-color: var(--primary-blue-light);
  transform: translateY(-2px);
}
.engine-num {
  font-size: 0.75rem; color: var(--accent-gold);
  font-weight: 700; margin-bottom: 6px;
}
.engine-name {
  font-size: 0.82rem; color: var(--text-primary);
  line-height: 1.4;
}

/* ========== 优势列表 ========== */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.advantage-item {
  display: flex; gap: 20px;
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  transition: var(--transition);
}
.advantage-item:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-gold);
}
.advantage-icon {
  width: 48px; height: 48px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent-gold-glow);
  border-radius: 12px;
  font-size: 1.3rem; color: var(--accent-gold);
}
.advantage-title {
  font-size: 1.1rem; font-weight: 600;
  color: var(--text-white);
  margin-bottom: 8px;
}
.advantage-desc {
  font-size: 0.9rem; color: var(--text-secondary);
  line-height: 1.7;
}

/* ========== 价格表格 ========== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}
.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  display: flex; flex-direction: column;
  transition: var(--transition);
  position: relative;
}
.pricing-card.featured {
  border-color: var(--accent-gold);
  background: linear-gradient(180deg, rgba(212, 168, 67, 0.08), var(--bg-card));
  transform: scale(1.03);
}
.pricing-card.featured::before {
  content: '推荐';
  position: absolute;
  top: -12px; left: 50%;
  transform: translateX(-50%);
  padding: 4px 20px;
  background: linear-gradient(135deg, var(--accent-gold), var(--accent-gold-light));
  color: var(--bg-dark);
  font-size: 0.75rem; font-weight: 700;
  border-radius: 50px;
}
.pricing-name {
  font-size: 1.2rem; font-weight: 700;
  color: var(--text-white);
  margin-bottom: 8px;
}
.pricing-target {
  font-size: 0.85rem; color: var(--text-muted);
  margin-bottom: 24px;
}
.pricing-price {
  margin-bottom: 28px;
}
.pricing-price .amount {
  font-size: 2.5rem; font-weight: 800;
  color: var(--accent-gold);
}
.pricing-price .period {
  font-size: 0.9rem; color: var(--text-muted);
  margin-left: 4px;
}
.pricing-features {
  flex: 1;
  display: flex; flex-direction: column; gap: 12px;
  margin-bottom: 28px;
}
.pricing-features li {
  display: flex; align-items: flex-start; gap: 10px;
  font-size: 0.88rem; color: var(--text-secondary);
}
.pricing-features li i { color: var(--accent-gold); margin-top: 4px; font-size: 0.75rem; }
.pricing-btn {
  width: 100%;
  padding: 14px;
  text-align: center;
  border-radius: var(--radius-sm);
  font-weight: 600; font-size: 0.95rem;
  transition: var(--transition);
}
.pricing-card:not(.featured) .pricing-btn {
  background: var(--bg-card-hover);
  color: var(--text-white);
  border: 1px solid var(--border-light);
}
.pricing-card:not(.featured) .pricing-btn:hover {
  border-color: var(--primary-blue-light);
}
.pricing-card.featured .pricing-btn {
  background: linear-gradient(135deg, var(--accent-gold), #C49A35);
  color: var(--bg-dark);
}

/* ========== FAQ ========== */
.faq-list {
  max-width: 800px; margin: 0 auto;
}
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
}
.faq-question {
  padding: 20px 24px;
  display: flex; align-items: center; justify-content: space-between;
  cursor: pointer;
  font-size: 1rem; font-weight: 600;
  color: var(--text-white);
  transition: var(--transition);
}
.faq-question:hover { background: var(--bg-card-hover); }
.faq-question i { color: var(--accent-gold); transition: transform 0.3s; }
.faq-item.open .faq-question i { transform: rotate(180deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}
.faq-item.open .faq-answer { max-height: 500px; }
.faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 0.92rem; color: var(--text-secondary);
  line-height: 1.8;
}

/* ========== 联系表单 ========== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.contact-info h3 {
  font-size: 1.5rem; font-weight: 700;
  color: var(--text-white);
  margin-bottom: 20px;
}
.contact-info p {
  color: var(--text-secondary);
  margin-bottom: 32px;
  line-height: 1.8;
}
.contact-item {
  display: flex; align-items: center; gap: 16px;
  margin-bottom: 20px;
}
.contact-item-icon {
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  background: var(--primary-blue-glow);
  border-radius: 12px;
  color: var(--primary-blue-light);
  font-size: 1.1rem;
}
.contact-item-label {
  font-size: 0.8rem; color: var(--text-muted);
  margin-bottom: 2px;
}
.contact-item-value {
  font-size: 1rem; color: var(--text-white);
  font-weight: 600;
}
.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 36px;
}
.form-group {
  margin-bottom: 20px;
}
.form-group label {
  display: block;
  font-size: 0.88rem; color: var(--text-secondary);
  margin-bottom: 8px;
  font-weight: 500;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-dark);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  color: var(--text-white);
  font-size: 0.95rem;
  font-family: inherit;
  transition: var(--transition);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-blue-light);
  box-shadow: 0 0 0 3px var(--primary-blue-glow);
}
.form-group textarea { resize: vertical; min-height: 100px; }
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.form-submit {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, var(--accent-gold), #C49A35);
  color: var(--bg-dark);
  border: none; border-radius: var(--radius-sm);
  font-size: 1rem; font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
}
.form-submit:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-gold);
}

/* ========== 页脚 ========== */
.footer {
  background: var(--bg-navy);
  border-top: 1px solid var(--border-light);
  padding: 60px 0 30px;
  margin-top: 80px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand p {
  font-size: 0.88rem; color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
}
.footer-col h2 {
  font-size: 0.95rem; font-weight: 600;
  color: var(--text-white);
  margin-bottom: 16px;
}
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col a {
  font-size: 0.85rem; color: var(--text-muted);
  transition: var(--transition);
}
.footer-col a:hover { color: var(--accent-gold); }
.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border-light);
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 12px;
}
.footer-bottom p {
  font-size: 0.8rem; color: var(--text-muted);
}
.footer-bottom .brand-link {
  color: var(--accent-gold);
}

/* ========== 面包屑 ========== */
.breadcrumb {
  padding: 100px 0 20px;
}
.breadcrumb-nav {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.85rem; color: var(--text-muted);
}
.breadcrumb-nav a { color: var(--text-secondary); }
.breadcrumb-nav a:hover { color: var(--accent-gold); }
.breadcrumb-nav .separator { color: var(--text-muted); }
.breadcrumb-nav .current { color: var(--accent-gold); }

/* ========== GEO四阶段方法论 ========== */
.methodology-flow {
  display: flex; align-items: stretch; justify-content: center;
  gap: 0; margin: 40px 0; flex-wrap: wrap;
}
.methodology-stage {
  flex: 1; min-width: 220px; max-width: 280px;
  background: linear-gradient(145deg, rgba(15, 40, 71, 0.8), rgba(10, 22, 40, 0.9));
  border: 1px solid var(--border-light);
  border-radius: 16px; padding: 28px 24px;
  position: relative; transition: color .2s ease, background-color .2s ease, border-color .2s ease, box-shadow .2s ease, transform .2s ease, opacity .2s ease;
}
.methodology-stage:hover {
  transform: translateY(-6px);
  border-color: var(--accent-gold);
  box-shadow: 0 12px 40px rgba(212, 168, 67, 0.15);
}
.stage-num {
  position: absolute; top: -14px; left: 24px;
  background: linear-gradient(135deg, var(--accent-gold), var(--accent-gold-light));
  color: var(--primary-deep); font-weight: 800; font-size: 0.85rem;
  padding: 4px 14px; border-radius: 20px; letter-spacing: 1px;
}
.stage-icon {
  width: 52px; height: 52px; border-radius: 14px;
  background: linear-gradient(135deg, rgba(212, 168, 67, 0.15), rgba(59, 130, 246, 0.1));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; color: var(--accent-gold); margin-bottom: 16px;
}
.stage-title {
  font-size: 1.15rem; font-weight: 700; color: var(--text-white);
  margin-bottom: 4px;
}
.stage-subtitle {
  font-size: 0.8rem; color: var(--accent-gold);
  letter-spacing: 1px; margin-bottom: 16px; text-transform: uppercase;
}
.stage-list {
  list-style: none; padding: 0; margin: 0 0 16px 0;
}
.stage-list li {
  font-size: 0.85rem; color: var(--text-secondary);
  padding: 6px 0; padding-left: 20px; position: relative;
  line-height: 1.5;
}
.stage-list li::before {
  content: '✓'; position: absolute; left: 0;
  color: var(--accent-gold); font-weight: 700;
}
.stage-engines {
  font-size: 0.72rem; color: var(--text-muted);
  padding-top: 12px; border-top: 1px solid var(--border-light);
  line-height: 1.6;
}
.methodology-arrow {
  display: flex; align-items: center; justify-content: center;
  width: 32px; color: var(--accent-gold); font-size: 1rem;
  flex-shrink: 0;
}

/* RAG召回监测诊断横向条 */
.rag-monitor-bar {
  margin: 40px 0;
  background: linear-gradient(135deg, rgba(30, 64, 175, 0.15), rgba(212, 168, 67, 0.08));
  border: 1px solid rgba(212, 168, 67, 0.3);
  border-radius: 16px; padding: 28px 32px;
}
.rag-monitor-content {
  display: flex; align-items: center; gap: 24px; flex-wrap: wrap;
}
.rag-monitor-icon {
  width: 56px; height: 56px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-gold), var(--primary-blue));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; color: white; flex-shrink: 0;
}
.rag-monitor-text {
  flex: 1; min-width: 280px;
}
.rag-monitor-text h3 {
  font-size: 1.15rem; font-weight: 700; color: var(--text-white);
  margin-bottom: 6px;
}
.rag-monitor-text p {
  font-size: 0.9rem; color: var(--text-secondary); line-height: 1.6;
}
.rag-monitor-engines {
  display: flex; flex-wrap: wrap; gap: 8px;
}
.rag-monitor-engines span {
  font-size: 0.75rem; color: var(--accent-gold);
  background: rgba(212, 168, 67, 0.1);
  border: 1px solid rgba(212, 168, 67, 0.25);
  padding: 4px 12px; border-radius: 20px;
}

/* ========== GEO vs SEO 对比表格 ========== */
.comparison-table {
  margin: 30px 0;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--border-light);
}
.comparison-row {
  display: flex;
  border-bottom: 1px solid var(--border-light);
}
.comparison-row:last-child { border-bottom: none; }
.comparison-header {
  background: linear-gradient(135deg, var(--primary-navy), var(--primary-deep));
  font-weight: 700;
}
.comparison-cell {
  flex: 1;
  padding: 16px 20px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  border-right: 1px solid var(--border-light);
}
.comparison-cell:last-child { border-right: none; }
.comparison-cell:first-child {
  flex: 0.8;
  font-weight: 600;
  color: var(--text-white);
  background: rgba(15, 40, 71, 0.5);
}
.comparison-header .comparison-cell {
  color: var(--text-white);
  font-size: 1rem;
}
.comparison-cell.highlight {
  background: linear-gradient(135deg, rgba(212, 168, 67, 0.08), rgba(59, 130, 246, 0.05));
  color: var(--accent-gold-light);
}
.comparison-header .comparison-cell.highlight {
  background: linear-gradient(135deg, rgba(212, 168, 67, 0.2), rgba(212, 168, 67, 0.1));
  color: var(--accent-gold);
}

/* 阶段描述文本 */
.stage-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-light);
}
.stage-list li strong {
  color: var(--text-white);
  font-weight: 600;
}

/* ========== 25引擎四阶段映射总览 ========== */
.engine-mapping-grid {
  display: flex; flex-direction: column; gap: 32px;
  margin: 30px 0;
}
.mapping-stage {
  background: linear-gradient(145deg, rgba(15, 40, 71, 0.6), rgba(10, 22, 40, 0.8));
  border: 1px solid var(--border-light);
  border-radius: 20px; padding: 28px;
  position: relative; overflow: hidden;
}
.mapping-stage::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px;
}
.stage-1::before { background: linear-gradient(90deg, #3B82F6, #60A5FA); }
.stage-2::before { background: linear-gradient(90deg, #10B981, #34D399); }
.stage-3::before { background: linear-gradient(90deg, #D4A843, #F0D78C); }
.stage-4::before { background: linear-gradient(90deg, #EF4444, #F87171); }

.mapping-stage-header {
  display: flex; align-items: center; gap: 20px; margin-bottom: 24px;
}
.mapping-stage-num {
  width: 56px; height: 56px; border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; font-weight: 800; color: white;
  flex-shrink: 0;
}
.stage-1 .mapping-stage-num { background: linear-gradient(135deg, #3B82F6, #1E40AF); }
.stage-2 .mapping-stage-num { background: linear-gradient(135deg, #10B981, #059669); }
.stage-3 .mapping-stage-num { background: linear-gradient(135deg, #D4A843, #B8860B); }
.stage-4 .mapping-stage-num { background: linear-gradient(135deg, #EF4444, #B91C1C); }

.mapping-stage-header h3 {
  font-size: 1.3rem; font-weight: 700; color: var(--text-white);
  margin-bottom: 4px;
}
.mapping-stage-header p {
  font-size: 0.85rem; color: var(--text-secondary); margin: 0;
}

.mapping-engines {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 12px;
}
.mapping-engine {
  background: rgba(10, 22, 40, 0.5);
  border: 1px solid var(--border-light);
  border-radius: 12px; padding: 16px;
  display: flex; flex-direction: column; gap: 6px;
  transition: color .2s ease, background-color .2s ease, border-color .2s ease, box-shadow .2s ease, transform .2s ease, opacity .2s ease;
}
.mapping-engine:hover {
  border-color: var(--accent-gold);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}
.me-num {
  display: inline-block;
  background: linear-gradient(135deg, var(--accent-gold), var(--accent-gold-light));
  color: var(--primary-deep);
  font-weight: 700; font-size: 0.75rem;
  padding: 2px 10px; border-radius: 10px;
  width: fit-content;
}
.me-name {
  font-size: 0.95rem; font-weight: 600; color: var(--text-white);
}
.me-desc {
  font-size: 0.8rem; color: var(--text-secondary); line-height: 1.5;
}
.me-output {
  font-size: 0.75rem; color: var(--accent-gold);
  padding-top: 6px; border-top: 1px solid var(--border-light);
  margin-top: 4px;
}
.mapping-goal {
  margin-top: 20px; padding: 14px 20px;
  background: rgba(212, 168, 67, 0.08);
  border-left: 3px solid var(--accent-gold);
  border-radius: 0 8px 8px 0;
  font-size: 0.9rem; color: var(--accent-gold-light);
  font-weight: 500;
}

/* 横向贯穿说明 */
.horizontal-note {
  display: flex; align-items: center; gap: 20px;
  background: linear-gradient(135deg, rgba(30, 64, 175, 0.12), rgba(212, 168, 67, 0.06));
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: 16px; padding: 24px 28px;
  margin: 20px 0;
}
.horizontal-note-icon {
  width: 48px; height: 48px; border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-light));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; color: white; flex-shrink: 0;
}
.horizontal-note-text h4 {
  font-size: 1.05rem; font-weight: 700; color: var(--text-white);
  margin-bottom: 6px;
}
.horizontal-note-text p {
  font-size: 0.88rem; color: var(--text-secondary); line-height: 1.6; margin: 0;
}

/* ========== 页面标题区 ========== */
.page-header {
  padding: 40px 0 60px;
}
.page-header h1 {
  font-size: 2.5rem; font-weight: 800;
  color: var(--text-white);
  margin-bottom: 16px;
}
.page-header p {
  font-size: 1.1rem; color: var(--text-secondary);
  max-width: 700px;
}

/* ========== 内容卡片 ========== */
.content-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 36px;
  margin-bottom: 24px;
}
.content-card h3 {
  font-size: 1.3rem; font-weight: 700;
  color: var(--text-white);
  margin-bottom: 16px;
  display: flex; align-items: center; gap: 12px;
}
.content-card h3 i { color: var(--accent-gold); }
.content-card p {
  color: var(--text-secondary);
  margin-bottom: 12px;
  line-height: 1.8;
}
.content-card ul {
  display: flex; flex-direction: column; gap: 10px;
  margin-top: 16px;
}
.content-card ul li {
  display: flex; align-items: flex-start; gap: 10px;
  color: var(--text-secondary);
  font-size: 0.92rem;
}
.content-card ul li i { color: var(--accent-gold); margin-top: 5px; font-size: 0.7rem; }

/* ========== 流程步骤 ========== */
.process-steps {
  display: flex;
  gap: 0;
  position: relative;
}
.process-step {
  flex: 1;
  text-align: center;
  position: relative;
  padding: 0 12px;
}
.process-step:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 28px; right: -50%;
  width: 100%; height: 2px;
  background: linear-gradient(90deg, var(--primary-blue-light), var(--border-light));
  z-index: 0;
}
.step-num {
  width: 56px; height: 56px;
  margin: 0 auto 16px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-light));
  border-radius: 50%;
  font-size: 1.3rem; font-weight: 800;
  color: var(--text-white);
  position: relative; z-index: 1;
}
.step-title {
  font-size: 1rem; font-weight: 600;
  color: var(--text-white);
  margin-bottom: 8px;
}
.step-desc {
  font-size: 0.82rem; color: var(--text-muted);
  line-height: 1.6;
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .business-grid, .pricing-grid { grid-template-columns: 1fr; }
  .pricing-card.featured { transform: none; }
  .engine-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .hero h1 { font-size: 2rem; }
  .hero-stats { grid-template-columns: 1fr 1fr; gap: 20px; }
  .advantage-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .engine-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .process-steps { flex-direction: column; gap: 24px; }
  .process-step:not(:last-child)::after { display: none; }
  .arch-layer { flex-direction: column; }
  .arch-layer-label { width: 100%; padding: 12px; }
  .section { padding: 60px 0; }
  .hero { padding: 120px 0 60px; }
}

/* ============================================
   意向合作表单
   ============================================ */
.lead-form-section {
  background: linear-gradient(135deg, #0A1628 0%, #1A2A4A 50%, #0D1B2A 100%);
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}
.lead-form-section::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(212,175,55,0.08) 0%, transparent 70%);
  pointer-events: none;
}
.lead-form-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
  align-items: center;
}
.lead-form-info h2 {
  font-size: 2rem;
  color: #fff;
  margin-bottom: 16px;
  line-height: 1.3;
}
.lead-form-info h2 span {
  color: #D4AF37;
}
.lead-form-info > p {
  color: rgba(255,255,255,0.7);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 32px;
}
.lead-form-benefits {
  list-style: none;
  padding: 0;
  margin: 0;
}
.lead-form-benefits li {
  color: rgba(255,255,255,0.85);
  padding: 10px 0;
  padding-left: 32px;
  position: relative;
  font-size: 0.95rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.lead-form-benefits li:last-child {
  border-bottom: none;
}
.lead-form-benefits li::before {
  content: '\f00c';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  position: absolute;
  left: 0;
  color: #D4AF37;
}
.lead-form-card {
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(212,175,55,0.2);
  border-radius: 16px;
  padding: 40px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}
.lead-form-card h3 {
  color: #fff;
  font-size: 1.3rem;
  margin-bottom: 8px;
  text-align: center;
}
.lead-form-card > p {
  color: rgba(255,255,255,0.6);
  font-size: 0.85rem;
  text-align: center;
  margin-bottom: 28px;
}
.form-group {
  margin-bottom: 18px;
}
.form-group label {
  display: block;
  color: rgba(255,255,255,0.85);
  font-size: 0.85rem;
  margin-bottom: 8px;
  font-weight: 500;
}
.form-group label .required {
  color: #D4AF37;
  margin-left: 4px;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 8px;
  color: #fff;
  font-size: 0.9rem;
  font-family: inherit;
  transition: color .2s ease, background-color .2s ease, border-color .2s ease, box-shadow .2s ease, transform .2s ease, opacity .2s ease;
  box-sizing: border-box;
}
.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(255,255,255,0.4);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: #D4AF37;
  background: rgba(255,255,255,0.1);
  box-shadow: 0 0 0 3px rgba(212,175,55,0.15);
}
.form-group select option {
  background: #1A2A4A;
  color: #fff;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.form-group textarea {
  resize: vertical;
  min-height: 80px;
}
.btn-submit {
  width: 100%;
  padding: 14px 32px;
  background: linear-gradient(135deg, #D4AF37, #B8960C);
  color: #0A1628;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: color .2s ease, background-color .2s ease, border-color .2s ease, box-shadow .2s ease, transform .2s ease, opacity .2s ease;
  font-family: inherit;
  margin-top: 8px;
}
.btn-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(212,175,55,0.3);
}
.btn-submit:active {
  transform: translateY(0);
}
.form-privacy {
  text-align: center;
  color: rgba(255,255,255,0.4);
  font-size: 0.75rem;
  margin-top: 16px;
}
.form-success {
  text-align: center;
  padding: 40px 20px;
  display: none;
}
.form-success.show {
  display: block;
}
.form-success i {
  font-size: 3rem;
  color: #D4AF37;
  margin-bottom: 16px;
}
.form-success h4 {
  color: #fff;
  font-size: 1.3rem;
  margin-bottom: 8px;
}
.form-success p {
  color: rgba(255,255,255,0.6);
  font-size: 0.9rem;
}

@media (max-width: 768px) {
  .lead-form-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .lead-form-info {
    text-align: center;
  }
  .lead-form-benefits li {
    text-align: left;
  }
  .lead-form-card {
    padding: 28px 20px;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
}

/* Corporate copyright and original brand information. */
.site-credits-line{font-size:12px;color:rgba(255,255,255,.6);text-align:center;padding:8px 20px;letter-spacing:1px;border-top:1px solid rgba(255,255,255,.08)}
.brand-info-open{font:inherit;color:inherit;background:none;border:0;text-decoration:underline;cursor:pointer;margin-left:8px}.brand-info-open[hidden]{display:none}
.brand-info-dialog{margin:auto;box-sizing:border-box;width:min(440px,calc(100% - 32px));max-height:calc(100dvh - 32px);overflow:auto;padding:48px 32px;border:0;border-radius:18px;background:linear-gradient(135deg,#fff,#f0f7ff);text-align:center;color:#374151;box-shadow:0 24px 70px rgba(0,0,0,.35);font-family:"Microsoft YaHei","PingFang SC",sans-serif}.brand-info-dialog::backdrop{background:rgba(0,0,0,.65)}.brand-info-close{position:absolute;right:14px;top:10px;border:0;background:none;font-size:30px;cursor:pointer;color:#666;width:36px;height:36px}.brand-info-title{font-size:27px;font-weight:800;color:#1e40af;line-height:1.5;letter-spacing:1px}.brand-info-divider{width:70px;height:3px;background:linear-gradient(90deg,#1e40af,#60a5fa);margin:24px auto}.brand-info-dialog p{font-size:17px;line-height:1.9;margin:0 0 28px}.brand-info-phone{display:inline-block;font-size:clamp(22px,6vw,30px);font-weight:800;color:#dc2626;letter-spacing:2px;background:linear-gradient(135deg,#fef2f2,#fee2e2);padding:14px 20px;border-radius:10px;border:1px solid #fecaca;text-decoration:none}