:root {
  --ai-primary: #1d4ed8;
  --ai-primary-light: #3b82f6;
  --ai-secondary: #06b6d4;
  --ai-accent: #f59e0b;
  --ai-dark: #0f172a;
  --ai-dark2: #1e293b;
  --ai-muted: #334155;
  --ai-light: #f8fafc;
  --ai-success: #10b981;
  --ai-gradient: linear-gradient(135deg, #1d4ed8 0%, #06b6d4 100%);
}

html { scroll-behavior: smooth; }
* { box-sizing: border-box; }
body { padding-top: 0; }

/* ===== 粘性导航（浮动式） ===== */
.ai-sticky-nav {
  position: fixed;
  top: -80px;
  left: 16px;
  right: 16px;
  max-width: 1268px;
  margin: 0 auto;
  z-index: 999;
  background: rgba(15,23,42,0.94);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 16px;
  padding: 0;
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
  transition: top 0.4s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.4s ease;
  opacity: 0;
}
.ai-sticky-nav.visible { top: 16px; opacity: 1; }
.ai-sticky-nav .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 20px;
}
.ai-sticky-nav .brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-weight: 600;
  font-size: 16px;
  text-decoration: none;
  cursor: pointer;
}
.ai-sticky-nav .brand i { font-size: 24px; color: var(--ai-primary-light); }
.ai-sticky-nav .nav-links { display: flex; gap: 6px; flex-wrap: wrap; }
.ai-sticky-nav .nav-links a {
  color: rgba(255,255,255,0.85);
  text-decoration: none;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 13px;
  transition: color 0.2s ease, background 0.2s ease;
  cursor: pointer;
}
.ai-sticky-nav .nav-links a:hover { background: rgba(255,255,255,0.1); color: #fff; }
.ai-sticky-nav .btn-sticky-cta {
  background: var(--ai-gradient);
  color: #fff;
  border: none;
  padding: 8px 20px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: box-shadow 0.2s ease, background 0.2s ease;
  text-decoration: none;
}
.ai-sticky-nav .btn-sticky-cta:hover { box-shadow: 0 4px 15px rgba(29,78,216,0.4); }

/* ===== Hero ===== */
.ai-hero {
  background: linear-gradient(135deg, #0b1a3a 0%, #0f2647 40%, #0a1f42 100%);
  padding: 120px 0 80px;
  position: relative;
  overflow: hidden;
  min-height: 80vh;
  display: flex;
  align-items: center;
}
#ai-particle-canvas {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  pointer-events: none;
  z-index: 1;
}
.ai-hero .container { position: relative; z-index: 2; }
.ai-hero-content { text-align: center; color: #fff; }
.ai-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(6,182,212,0.15);
  border: 1px solid rgba(6,182,212,0.3);
  padding: 8px 18px;
  border-radius: 50px;
  font-size: 13px;
  color: var(--ai-secondary);
  margin-bottom: 28px;
}
.ai-hero-badge i { font-size: 16px; }
.ai-hero h1 {
  font-size: clamp(32px,5vw,56px);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
  color: #fff;
}
.ai-hero h1 .highlight {
  background: linear-gradient(135deg, #60a5fa, #06b6d4);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.ai-hero .subhead {
  font-size: clamp(15px,1.3vw,18px);
  color: rgba(255,255,255,0.88);
  max-width: 680px;
  margin: 0 auto 32px;
  line-height: 1.7;
}
.ai-hero .pain-points {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 32px;
}
.ai-hero .pain-point {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 13px;
  color: rgba(255,255,255,0.88);
  cursor: default;
}
.ai-hero .pain-point i { color: #f87171; font-size: 14px; }
.cta-group {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn-primary-custom {
  background: var(--ai-gradient);
  color: #fff;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 15px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: box-shadow 0.25s ease, background 0.25s ease;
  box-shadow: 0 4px 20px rgba(29,78,216,0.35);
}
.btn-primary-custom:hover {
  box-shadow: 0 8px 30px rgba(29,78,216,0.45);
  color: #fff;
}
.btn-primary-custom:active {
  transform: scale(0.97);
  box-shadow: 0 2px 10px rgba(29,78,216,0.3);
}
.btn-secondary-custom {
  background: rgba(255,255,255,0.08);
  color: #fff;
  padding: 14px 28px;
  border-radius: 50px;
  font-size: 15px;
  font-weight: 500;
  border: 2px solid rgba(255,255,255,0.2);
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: background 0.25s ease, border-color 0.25s ease;
}
.btn-secondary-custom:hover {
  background: rgba(255,255,255,0.15);
  color: #fff;
}
.btn-secondary-custom:active {
  transform: scale(0.97);
  background: rgba(255,255,255,0.1);
}
.ai-stats-row {
  display: flex;
  gap: 40px;
  justify-content: center;
  margin-top: 50px;
  flex-wrap: wrap;
}
.ai-stat-item { text-align: center; }
.ai-stat-item .num {
  font-size: 38px;
  font-weight: 700;
  display: block;
  background: linear-gradient(135deg, #60a5fa, #06b6d4);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.ai-stat-item .num small {
  font-size: 16px;
  -webkit-text-fill-color: rgba(255,255,255,0.88);
}
.ai-stat-item .label {
  font-size: 13px;
  color: rgba(255,255,255,0.85);
  display: block;
  margin-top: 4px;
}

/* ===== 通用区块 ===== */
.section-block { padding: 80px 0; }
.section-title {
  text-align: center;
  margin-bottom: 50px;
}
.section-title h2 {
  font-size: clamp(24px,2.8vw,36px);
  font-weight: 700;
  color: var(--ai-dark);
  margin-bottom: 12px;
}
.section-title p {
  font-size: 16px;
  color: var(--ai-muted);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
}
.section-title .overline {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--ai-primary);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 8px;
  padding-left: 14px;
  border-left: 3px solid var(--ai-primary);
  line-height: 1;
}

/* ===== 问题区块 ===== */
.ai-problem { background: var(--ai-light); }
.ai-problem-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 900px;
  margin: 0 auto;
}
.ai-problem-card {
  background: #fff;
  border-radius: 20px;
  padding: 36px 28px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.04);
  border: 1px solid #e2e8f0;
  transition: box-shadow 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}
.ai-problem-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--ai-gradient);
  opacity: 0;
  transition: opacity 0.25s ease;
}
.ai-problem-card:hover::before { opacity: 1; }
.ai-problem-card:hover {
  box-shadow: 0 12px 30px rgba(0,0,0,0.08);
  border-color: var(--ai-primary-light);
  transform: translateY(-4px);
}
.ai-problem-card .icon-wrap {
  width: 56px; height: 56px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 20px;
}
.ai-problem-card .icon-wrap.p1 { background: rgba(239,68,68,0.1); color: #ef4444; }
.ai-problem-card .icon-wrap.p2 { background: rgba(245,158,11,0.1); color: #f59e0b; }
.ai-problem-card .icon-wrap.p3 { background: rgba(16,185,129,0.1); color: #10b981; }
.ai-problem-card h4 { font-size: 17px; font-weight: 600; margin-bottom: 10px; color: var(--ai-dark); }
.ai-problem-card p { font-size: 14px; color: var(--ai-muted); line-height: 1.7; }

/* ===== 解决方案 ===== */
.ai-solution {
  background: linear-gradient(135deg, var(--ai-dark) 0%, #1a2744 100%);
  color: #fff;
}
.ai-solution .section-title h2 { color: #fff; }
.ai-solution .section-title p { color: rgba(255,255,255,0.85); }
.ai-solution .section-title .overline { color: #38bdf8; border-left-color: #38bdf8; }
.solution-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.solution-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 20px;
  padding: 36px 28px;
  transition: background 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
  cursor: pointer;
}
.solution-card:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(6,182,212,0.3);
  transform: translateY(-4px);
}
.solution-card .icon-wrap {
  width: 56px; height: 56px;
  border-radius: 16px;
  background: rgba(6,182,212,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: var(--ai-secondary);
  margin-bottom: 20px;
}
.solution-card h4 { font-size: 17px; font-weight: 600; margin-bottom: 10px; color: #fff; }
.solution-card p { font-size: 14px; color: rgba(255,255,255,0.85); line-height: 1.7; margin-bottom: 16px; }
.solution-card .tag-list { display: flex; gap: 8px; flex-wrap: wrap; }
.solution-card .tag-list span {
  background: rgba(255,255,255,0.08);
  padding: 4px 10px;
  border-radius: 10px;
  font-size: 11px;
  color: rgba(255,255,255,0.82);
}

/* ===== 诊断流程 ===== */
.ai-process { background: var(--ai-light); }
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
}
.process-steps::before {
  content: '';
  position: absolute;
  top: 32px;
  left: 10%;
  right: 10%;
  height: 2px;
  background: linear-gradient(90deg, var(--ai-primary-light), var(--ai-secondary), transparent);
  z-index: 0;
}
.process-step {
  text-align: center;
  position: relative;
  z-index: 1;
}
.process-step .step-num {
  width: 64px; height: 64px;
  border-radius: 50%;
  background: var(--ai-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  box-shadow: 0 4px 15px rgba(29,78,216,0.3);
  cursor: default;
  user-select: none;
}
.process-step h4 { font-size: 15px; font-weight: 600; margin-bottom: 8px; color: var(--ai-dark); }
.process-step p { font-size: 13px; color: var(--ai-muted); line-height: 1.6; max-width: 220px; margin: 0 auto; }

/* ===== 卡片网格 ===== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: #fff;
  border-radius: 16px;
  padding: 28px 24px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.04);
  border: 1px solid #e2e8f0;
  transition: box-shadow 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
  cursor: pointer;
}
.feature-card:hover {
  box-shadow: 0 12px 30px rgba(0,0,0,0.08);
  border-color: var(--ai-primary-light);
  transform: translateY(-4px);
}
.feature-card .icon-wrap {
  width: 48px; height: 48px;
  border-radius: 14px;
  background: rgba(29,78,216,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: var(--ai-primary);
  margin-bottom: 16px;
}
.feature-card h4 { font-size: 16px; font-weight: 600; margin-bottom: 8px; }
.feature-card p { font-size: 13px; color: var(--ai-muted); line-height: 1.7; }

/* ===== 信任墙 ===== */
.ai-trust { background: var(--ai-dark); color: #fff; }
.ai-trust .section-title h2 { color: #fff; }
.ai-trust .section-title p { color: rgba(255,255,255,0.85); }
.ai-trust .section-title .overline { color: #38bdf8; border-left-color: #38bdf8; }
.ai-trust .case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.ai-trust .case-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 16px;
  padding: 24px;
  transition: background 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
  cursor: pointer;
}
.ai-trust .case-card:hover {
  background: rgba(255,255,255,0.07);
  border-color: rgba(59,130,246,0.3);
  transform: translateY(-4px);
}
.ai-trust .case-card .badge-cat {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 8px;
  font-size: 11px;
  font-weight: 600;
  margin-bottom: 12px;
}
.ai-trust .case-card .badge-cat.mfg { background: rgba(245,158,11,0.15); color: #f59e0b; }
.ai-trust .case-card .badge-cat.fin { background: rgba(16,185,129,0.15); color: #10b981; }
.ai-trust .case-card .badge-cat.ret { background: rgba(139,92,246,0.15); color: #8b5cf6; }
.ai-trust .case-card h4 { font-size: 16px; font-weight: 600; margin-bottom: 6px; color: #fff; }
.ai-trust .case-card .metrics {
  font-size: 13px;
  color: var(--ai-secondary);
  margin-bottom: 10px;
}
.ai-trust .case-card p { font-size: 13px; color: rgba(255,255,255,0.85); line-height: 1.6; }

/* ===== 模板区块 ===== */
.ai-templates { background: var(--ai-light); }
.template-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.template-card {
  background: #fff;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(0,0,0,0.06);
  border: 1px solid #e2e8f0;
  transition: box-shadow 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
  cursor: pointer;
}
.template-card:hover {
  box-shadow: 0 12px 30px rgba(0,0,0,0.1);
  border-color: var(--ai-primary-light);
  transform: translateY(-4px);
}
.template-preview {
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 40px;
}
.template-preview.t1 { background: linear-gradient(135deg, #dbeafe, #eff6ff); color: #1d4ed8; }
.template-preview.t2 { background: linear-gradient(135deg, #fef3c7, #fde68a); color: #92400e; }
.template-preview.t3 { background: linear-gradient(135deg, #1e293b, #334155); color: #38bdf8; }
.template-body { padding: 20px; }
.template-body h4 { font-size: 16px; font-weight: 600; margin-bottom: 4px; color: var(--ai-dark); }
.template-body .desc { font-size: 13px; color: var(--ai-muted); }
.template-body .use-case { margin-top: 10px; font-size: 12px; color: var(--ai-muted); }
.template-body .use-case i { color: var(--ai-primary-light); }

/* ===== 系统集成 ===== */
.ai-integration {
  background: linear-gradient(135deg, var(--ai-dark), #1a2744);
  color: #fff;
}
.ai-integration .section-title h2 { color: #fff; }
.ai-integration .section-title p { color: rgba(255,255,255,0.85); }
.code-block {
  background: rgba(0,0,0,0.3);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 12px;
  padding: 20px;
  font-family: 'Courier New', monospace;
  font-size: 13px;
  line-height: 1.6;
  color: #a5b4fc;
  overflow-x: auto;
}
.code-block .cmt { color: #94a3b8; }
.code-block .key { color: #f472b6; }
.code-block .str { color: #34d399; }

/* ===== CTA ===== */
.ai-cta {
  background: linear-gradient(135deg, #1e3a8a 0%, #1d4ed8 50%, #06b6d4 100%);
  padding: 80px 0;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.ai-cta::before {
  content: '';
  position: absolute;
  top: -50%; left: -50%; right: -50%; bottom: -50%;
  background: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 20px,
    rgba(255,255,255,0.02) 20px,
    rgba(255,255,255,0.02) 40px
  );
}
.ai-cta::after {
  content: '';
  position: absolute;
  top: -200px; right: -200px;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(6,182,212,0.15) 0%, transparent 70%);
  pointer-events: none;
}
.ai-cta .container { position: relative; z-index: 2; }
.ai-cta h2 { font-size: clamp(24px,3vw,36px); font-weight: 700; margin-bottom: 12px; }
.ai-cta p { font-size: 16px; opacity: 0.95; margin-bottom: 28px; max-width: 600px; margin-left: auto; margin-right: auto; }

/* ===== Footer 覆盖 ===== */
.footer-area {
  background: var(--ai-light) !important;
  background-image: none !important;
}
.footer-area .single-footer-widget h3 { color: var(--ai-dark); }
.footer-area .single-footer-widget h3::before { background-color: var(--ai-primary); }
.footer-area .single-footer-widget p { color: var(--ai-muted); }
.footer-area .newsletter-form .input-newsletter {
  color: var(--ai-dark) !important;
  border-color: #e2e8f0 !important;
  background-color: #fff !important;
}
.footer-area .newsletter-form .input-newsletter::placeholder { color: #94a3b8 !important; }
.footer-area .newsletter-form .input-newsletter:focus { border-color: var(--ai-primary-light) !important; }
.footer-area .newsletter-form button { background-color: var(--ai-primary) !important; color: #fff !important; }
.footer-area .newsletter-form button:hover { background-color: var(--ai-primary-light) !important; color: #fff !important; }
.footer-area .copyright-area {
  background: var(--ai-dark);
  border-top: none;
  margin-top: 0;
}
.footer-area .copyright-area p { color: rgba(255,255,255,0.85); }
.footer-area .copyright-area a { color: rgba(255,255,255,0.85); }

/* ===== 键盘导航焦点样式 ===== */
a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--ai-primary-light);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ===== 滚动入场动画 ===== */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}
.fade-up.visible { opacity: 1; transform: translateY(0); }
.fade-up-delay-1 { transition-delay: 0.1s; }
.fade-up-delay-2 { transition-delay: 0.2s; }
.fade-up-delay-3 { transition-delay: 0.3s; }
.fade-up-delay-4 { transition-delay: 0.4s; }
.fade-up-delay-5 { transition-delay: 0.5s; }

/* ===== 无障碍：减少动画 ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
  .ai-sticky-nav { transition: none; }
  #ai-particle-canvas { display: none; }
  .process-steps::before { display: none; }
  .fade-up { opacity: 1; transform: none; transition: none; }
}

/* ===== 响应式 ===== */
@media (min-width: 1400px) {
  .ai-hero { padding: 140px 0 100px; }
  .ai-stats-row { gap: 60px; }
  .section-block { padding: 100px 0; }
}

@media (max-width: 1200px) {
  .solution-grid { grid-template-columns: repeat(2, 1fr); }
  .ai-problem-grid { max-width: none; }
}

@media (max-width: 992px) {
  .ai-problem-grid,
  .feature-grid,
  .ai-trust .case-grid,
  .template-grid { grid-template-columns: repeat(2, 1fr); }
  .ai-problem-grid { max-width: none; }
  .solution-grid { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: repeat(2, 1fr); gap: 30px; }
  .process-steps::before { display: none; }
  .ai-sticky-nav .nav-links { display: none; }
  .ai-sticky-nav .inner { padding: 8px 16px; }
  .section-title h2 { font-size: clamp(22px, 2.5vw, 32px); }
  .section-title p { font-size: 15px; }
  .ai-hero { padding: 110px 0 70px; min-height: 70vh; }
  .ai-hero h1 { font-size: clamp(28px, 4.5vw, 48px); }
  .ai-hero .subhead { font-size: clamp(14px, 1.2vw, 17px); }
  .ai-stats-row { gap: 30px; }
  .ai-stat-item .num { font-size: 32px; }
  .code-block { font-size: 12px; padding: 16px; }
  .ai-cta { padding: 60px 0; }
  .ai-cta h2 { font-size: clamp(22px, 2.8vw, 32px); }
  .ai-cta p { font-size: 15px; }
}

@media (max-width: 768px) {
  .ai-hero { padding: 90px 0 50px; min-height: auto; }
  .ai-hero h1 { font-size: 26px; }
  .ai-hero .subhead { font-size: 14px; }
  .ai-hero-badge { font-size: 12px; padding: 6px 14px; margin-bottom: 20px; }
  .ai-stats-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 40px;
  }
  .ai-stat-item .num { font-size: 28px; }
  .ai-stat-item .label { font-size: 12px; }
  .section-block { padding: 50px 0; }
  .section-title { margin-bottom: 36px; }
  .section-title h2 { font-size: 22px; }
  .section-title p { font-size: 14px; }
  .section-title .overline { font-size: 12px; padding-left: 10px; }
  .ai-problem-grid,
  .solution-grid,
  .feature-grid,
  .ai-trust .case-grid,
  .template-grid { grid-template-columns: 1fr; gap: 16px; }
  .ai-problem-card,
  .solution-card { padding: 24px 20px; }
  .process-steps { grid-template-columns: 1fr; max-width: 320px; margin: 0 auto; gap: 24px; }
  .process-step .step-num { width: 52px; height: 52px; font-size: 18px; }
  .ai-sticky-nav { display: none; }
  .btn-primary-custom,
  .btn-secondary-custom { padding: 12px 24px; font-size: 14px; }
  .code-block { font-size: 11px; padding: 14px; overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .template-preview { height: 110px; font-size: 32px; }
  .ai-cta { padding: 50px 0; }
  .ai-cta h2 { font-size: 22px; }
  .ai-cta p { font-size: 14px; margin-bottom: 24px; }
  .ai-cta::after { width: 300px; height: 300px; top: -100px; right: -100px; }
}

@media (max-width: 576px) {
  .container { padding-left: 16px; padding-right: 16px; }
  .ai-hero { padding: 80px 0 40px; }
  .ai-hero h1 { font-size: 22px; margin-bottom: 14px; }
  .ai-hero .subhead { font-size: 13px; margin-bottom: 24px; }
  .ai-hero .pain-points { display: none; }
  .cta-group { flex-direction: column; align-items: stretch; gap: 10px; }
  .cta-group .btn-primary-custom,
  .cta-group .btn-secondary-custom { width: 100%; justify-content: center; padding: 14px 20px; }
  .ai-stats-row { gap: 16px; margin-top: 32px; }
  .ai-stat-item .num { font-size: 24px; }
  .ai-stat-item .label { font-size: 11px; }
  .section-block { padding: 40px 0; }
  .section-title { margin-bottom: 28px; }
  .section-title h2 { font-size: 20px; }
  .section-title p { font-size: 13px; }
  .ai-problem-card { padding: 20px 16px; }
  .ai-problem-card h4 { font-size: 15px; }
  .ai-problem-card p { font-size: 13px; }
  .solution-card { padding: 20px 16px; }
  .solution-card h4 { font-size: 15px; }
  .solution-card p { font-size: 13px; }
  .solution-card .tag-list span { font-size: 10px; padding: 3px 8px; }
  .process-step .step-num { width: 46px; height: 46px; font-size: 16px; margin-bottom: 12px; }
  .process-step h4 { font-size: 14px; }
  .process-step p { font-size: 12px; }
  .ai-trust .case-card { padding: 18px; }
  .ai-trust .case-card h4 { font-size: 15px; }
  .ai-trust .case-card p { font-size: 12px; }
  .template-preview { height: 90px; font-size: 28px; }
  .template-body { padding: 16px; }
  .template-body h4 { font-size: 15px; }
  .template-body .desc { font-size: 12px; }
  .template-body .use-case { font-size: 11px; }
  .ai-cta { padding: 40px 0; }
  .ai-cta h2 { font-size: 20px; }
  .ai-cta p { font-size: 13px; }
  .code-block { padding: 12px; font-size: 10px; }
  .fade-up { transform: translateY(20px); }
}