/* ============================================
   小蚁互联官网 - 主样式表 (精简优化版)
   ============================================ */

:root {
  --primary: #2563eb;
  --primary-light: #3b82f6;
  --primary-dark: #1d4ed8;
  --secondary: #06b6d4;
  --accent: #8b5cf6;
  --gradient: linear-gradient(135deg, #2563eb 0%, #06b6d4 100%);
  --gradient-purple: linear-gradient(135deg, #2563eb 0%, #8b5cf6 100%);
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-tertiary: #94a3b8;
  --border: #e2e8f0;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text-primary);
  background: var(--bg-primary);
  line-height: 1.6;
  overflow-x: hidden;
}
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* Navigation */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.navbar .container { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.nav-logo { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--text-primary); }
.nav-logo-text { font-size: 1.45rem; font-weight: 700; }
.nav-links { display: flex; align-items: center; gap: 12px; }
.nav-links a {
  text-decoration: none; color: var(--text-secondary);
  font-size: 1.15rem; font-weight: 500; padding: 8px 16px;
  border-radius: 8px; transition: var(--transition); position: relative;
}
.nav-links a:hover, .nav-links a.active { color: var(--primary); background: rgba(37, 99, 235, 0.05); }
.nav-links a.active::after {
  content: ''; position: absolute; bottom: 0; left: 50%;
  transform: translateX(-50%); width: 20px; height: 2px;
  background: var(--primary); border-radius: 1px;
}
.nav-cta {
  background: var(--gradient) !important; color: white !important;
  padding: 11px 28px !important; border-radius: 10px !important;
  font-weight: 600 !important; font-size: 1.25rem !important;
  margin-left: 16px; box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
  transition: all 0.3s ease !important;
}
.nav-cta:hover { transform: translateY(-4px); box-shadow: 0 8px 20px rgba(37, 99, 235, 0.45) !important; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 8px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--text-primary); border-radius: 2px; transition: var(--transition); }

/* Hero */
.hero {
  position: relative; min-height: 700px; display: flex; align-items: center;
  padding: 100px 0 80px;
  background: linear-gradient(135deg, #f8faff 0%, #eef4ff 30%, #e0edff 60%, #f0f7ff 100%);
  overflow: visible;
}
.hero-bg-image {
  position: absolute; inset: 0; z-index: 1;
  background: 
    radial-gradient(ellipse at 15% 50%, rgba(59, 130, 246, 0.12) 0%, transparent 50%),
    radial-gradient(ellipse at 85% 30%, rgba(6, 182, 212, 0.1) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 90%, rgba(139, 92, 246, 0.08) 0%, transparent 50%);
}
.hero .container { position: relative; z-index: 2; }
.hero-container { display: flex; align-items: center; justify-content: space-between; gap: 40px; max-width: 100%; margin: 0 auto; padding: 40px 60px; margin-bottom: 20px; }
.hero-content { flex: 0 0 45%; max-width: 45%; position: relative; z-index: 2; }
.hero-visual { flex: 0 0 55%; max-width: 55%; text-align: center; display: flex; justify-content: center; align-items: flex-start; position: relative; overflow: visible; padding-top: 0; }
.hero-visual .robot-image { max-width: 100%; height: auto; display: block; max-height: 500px; object-fit: contain; position: relative; z-index: 2; filter: drop-shadow(0 20px 40px rgba(59, 130, 246, 0.15)); }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; padding: 8px 20px; background: white; border: 1.5px solid var(--border); border-radius: 100px; font-size: 1.2rem; color: var(--text-secondary); margin-bottom: 28px; box-shadow: var(--shadow-sm); }
.badge-dot { width: 8px; height: 8px; background: var(--primary); border-radius: 50%; animation: pulse 2s infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }

.hero h1 { font-size: 4rem; font-weight: 800; line-height: 1.3; margin-bottom: 28px; color: var(--text-primary); letter-spacing: -0.02em; word-break: keep-all; }
.gradient-text { background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary) 50%, var(--secondary) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero p { font-size: 1.3rem; color: var(--text-secondary); margin-bottom: 40px; line-height: 1.7; max-width: 100%; }
.hero-buttons { display: flex; gap: 20px; }
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px; padding: 16px 32px;
  background: var(--gradient); color: white; text-decoration: none;
  border-radius: 10px; font-weight: 600; font-size: 1.7rem; transition: var(--transition);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3); border: none; cursor: pointer;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(37, 99, 235, 0.4); }
.btn-secondary {
  display: inline-flex; align-items: center; gap: 8px; padding: 16px 32px;
  background: white; color: var(--text-primary); text-decoration: none;
  border-radius: 10px; font-weight: 600; font-size: 1.7rem;
  border: 1px solid var(--border); transition: var(--transition); cursor: pointer;
}
.btn-secondary:hover { background: var(--bg-secondary); transform: translateY(-2px); box-shadow: var(--shadow); }
.hero-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px; padding-top: 48px; border-top: 1px solid var(--border); }
.hero-stat { text-align: center; min-width: 140px; }
.stat-icon { font-size: 2.5rem; margin-bottom: 12px; }
.hero-stat .number { font-size: 3rem; font-weight: 800; color: var(--primary); margin-bottom: 6px; min-width: 120px; display: inline-block; font-variant-numeric: tabular-nums; }
.hero-stat .label { font-size: 1.3rem; color: var(--text-secondary); }
.scroll-indicator { position: absolute; bottom: 40px; left: 50%; transform: translateX(-50%); display: flex; flex-direction: column; align-items: center; gap: 8px; color: var(--text-tertiary); font-size: 0.9rem; animation: bounce 2s infinite; z-index: 2; }
@keyframes bounce { 0%, 100% { transform: translateX(-50%) translateY(0); } 50% { transform: translateX(-50%) translateY(10px); } }

/* Sections Common */
.section-header { text-align: center; margin-bottom: 72px; }
.section-badge { display: inline-block; padding: 10px 24px; background: rgba(37, 99, 235, 0.1); color: var(--primary); border-radius: 100px; font-size: 1.8rem; font-weight: 600; margin-bottom: 20px; }
.section-header h2 { font-size: 3.5rem; font-weight: 800; color: var(--text-primary); margin-bottom: 20px; letter-spacing: -0.02em; }
.section-header p { font-size: 1.45rem; color: var(--text-secondary); max-width: 600px; margin: 0 auto; line-height: 1.7; }

/* Features */
.features { padding: 100px 0; background: var(--bg-secondary); }
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card { background: white; padding: 40px; border-radius: var(--radius-lg); border: 1px solid var(--border); transition: var(--transition); position: relative; overflow: hidden; }
.feature-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--gradient); transform: scaleX(0); transition: transform 0.3s ease; }
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-xl); border-color: rgba(37, 99, 235, 0.2); }
.feature-card:hover::before { transform: scaleX(1); }
.feature-icon { font-size: 3rem; margin-bottom: 24px; }
.feature-card h3 { font-size: 1.7rem; font-weight: 700; margin-bottom: 14px; color: var(--text-primary); }
.feature-card p { font-size: 1.05rem; color: var(--text-secondary); line-height: 1.7; margin-bottom: 20px; }
.feature-tag { display: inline-block; padding: 6px 14px; background: rgba(37, 99, 235, 0.1); color: var(--primary); border-radius: 100px; font-size: 1rem; font-weight: 600; }

/* Feature Rows */
.feature-rows { padding: 100px 0; }
.feature-row { padding: 80px 0; }
.row-content { display: flex; align-items: center; gap: 80px; }
.row-text { flex: 1; }
.row-text .section-badge { margin-bottom: 16px; }
.row-text h2 { font-size: 2.5rem; font-weight: 800; margin-bottom: 20px; color: var(--text-primary); }
.row-text p { font-size: 1.2rem; color: var(--text-secondary); margin-bottom: 32px; line-height: 1.8; }
.feature-list { list-style: none; margin-bottom: 32px; }
.feature-list li { display: flex; align-items: center; gap: 12px; padding: 12px 0; font-size: 1.3rem; color: var(--text-secondary); }
.check-icon { width: 24px; height: 24px; background: rgba(37, 99, 235, 0.1); color: var(--primary); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 0.8rem; font-weight: 700; flex-shrink: 0; }
.row-visual { flex: 1.5; }

/* Chat Demo */
.chat-demo { background: white; border-radius: var(--radius-xl); box-shadow: var(--shadow-xl); overflow: hidden; border: 1px solid var(--border); }
.chat-header { display: flex; align-items: center; gap: 12px; padding: 20px 24px; background: var(--bg-secondary); border-bottom: 1px solid var(--border); }
.chat-avatar { width: 40px; height: 40px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 0.9rem; }
.chat-avatar.ai { background: var(--gradient); color: white; }
.chat-info { flex: 1; }
.chat-name { font-weight: 600; color: var(--text-primary); }
.chat-status { font-size: 0.8rem; color: #10b981; }
.chat-messages { padding: 24px; display: flex; flex-direction: column; gap: 16px; min-height: 300px; }
.message { display: flex; flex-direction: column; gap: 4px; }
.message.ai { align-items: flex-start; }
.message.user { align-items: flex-end; }
.message-bubble { max-width: 80%; padding: 12px 16px; border-radius: 16px; font-size: 0.9rem; line-height: 1.6; }
.message.ai .message-bubble { background: var(--bg-secondary); color: var(--text-primary); border-bottom-left-radius: 4px; }
.message.user .message-bubble { background: var(--gradient); color: white; border-bottom-right-radius: 4px; }
.message-time { font-size: 0.75rem; color: var(--text-tertiary); }
.chat-input { padding: 16px 24px; border-top: 1px solid var(--border); }
.typing-indicator { display: flex; gap: 4px; padding: 8px 0; }
.typing-indicator span { width: 8px; height: 8px; background: var(--text-tertiary); border-radius: 50%; animation: typing 1.4s infinite; }
.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }
@keyframes typing { 0%, 60%, 100% { transform: translateY(0); opacity: 0.5; } 30% { transform: translateY(-8px); opacity: 1; } }

/* Flow Demo */
.flow-demo { background: white; border-radius: var(--radius-xl); padding: 40px; box-shadow: var(--shadow-xl); border: 1px solid var(--border); display: flex; align-items: center; justify-content: center; gap: 16px; flex-wrap: wrap; }
.flow-step { display: flex; flex-direction: column; align-items: center; gap: 8px; padding: 20px; background: var(--bg-secondary); border-radius: var(--radius); min-width: 100px; }
.flow-icon { font-size: 2.2rem; }
.flow-label { font-size: 1rem; font-weight: 600; color: var(--text-primary); }
.flow-arrow { font-size: 1.5rem; color: var(--primary); font-weight: 700; }
.flow-result { width: 100%; margin-top: 20px; padding: 16px; background: rgba(37, 99, 235, 0.05); border-radius: var(--radius); text-align: center; }
.result-badge { display: inline-block; padding: 4px 12px; background: var(--gradient); color: white; border-radius: 100px; font-size: 1.1rem; font-weight: 600; margin-bottom: 8px; }
.result-text { font-size: 1.2rem; color: var(--text-secondary); }

/* Stats Bar */
.stats-bar { padding: 80px 0; background: var(--gradient); position: relative; overflow: hidden; }
.stats-bg-pattern { position: absolute; inset: 0; background-image: radial-gradient(rgba(255, 255, 255, 0.1) 1px, transparent 1px); background-size: 30px 30px; opacity: 0.5; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; position: relative; z-index: 1; }
.stat-item { text-align: center; color: white; }
.stat-number { font-size: 4rem; font-weight: 800; display: inline-block; vertical-align: middle; }
.stat-suffix { font-size: 3rem; font-weight: 700; margin-left: 4px; display: inline-block; vertical-align: middle; }
.stat-label { font-size: 1.3rem; opacity: 0.9; margin-top: 8px; }

/* Pricing Link */
.pricing-link-section { padding: 80px 0; background: var(--bg-secondary); }
.pricing-link-card { display: block; background: white; border-radius: var(--radius-xl); padding: 40px; border: 1px solid var(--border); transition: var(--transition); text-decoration: none; color: inherit; }
.pricing-link-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-xl); border-color: rgba(37, 99, 235, 0.2); }
.pricing-link-content { display: flex; align-items: center; gap: 24px; }
.pricing-link-icon { font-size: 3rem; }
.pricing-link-text { flex: 1; }
.pricing-link-text h3 { font-size: 1.5rem; font-weight: 700; margin-bottom: 8px; color: var(--text-primary); }
.pricing-link-text p { font-size: 1rem; color: var(--text-secondary); }
.pricing-link-arrow { width: 48px; height: 48px; background: var(--gradient); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: white; transition: var(--transition); }
.pricing-link-card:hover .pricing-link-arrow { transform: translateX(4px); }

/* Solutions */
.solutions { padding: 100px 0; }
.solutions-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.solution-card { background: white; padding: 32px; border-radius: var(--radius-lg); border: 1px solid var(--border); transition: var(--transition); }
.solution-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-xl); border-color: rgba(37, 99, 235, 0.2); }
.solution-icon { font-size: 2.5rem; margin-bottom: 20px; }
.solution-card h3 { font-size: 1.4rem; font-weight: 700; margin-bottom: 12px; color: var(--text-primary); }
.solution-card p { font-size: 1.05rem; color: var(--text-secondary); line-height: 1.7; margin-bottom: 20px; }
.solution-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.solution-tags span { padding: 4px 12px; background: var(--bg-secondary); color: var(--text-secondary); border-radius: 100px; font-size: 1rem; }

/* Tech */
.tech { padding: 100px 0; background: var(--bg-secondary); }
.tech-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.tech-card { background: white; padding: 32px; border-radius: var(--radius-lg); border: 1px solid var(--border); transition: var(--transition); }
.tech-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-xl); border-color: rgba(37, 99, 235, 0.2); }
.tech-icon { font-size: 2.5rem; margin-bottom: 20px; }
.tech-card h3 { font-size: 1.4rem; font-weight: 700; margin-bottom: 12px; color: var(--text-primary); }
.tech-card p { font-size: 1.05rem; color: var(--text-secondary); line-height: 1.7; }

/* Testimonials */
.testimonials { padding: 100px 0; }
.testimonials-carousel { position: relative; }
.carousel-container { overflow: hidden; border-radius: var(--radius-xl); }
.carousel-track { display: flex; transition: transform 0.5s ease; }
.testimonial-card { min-width: 100%; padding: 40px; background: white; border-radius: var(--radius-xl); border: 1px solid var(--border); }
.testimonial-header { display: flex; align-items: center; gap: 16px; margin-bottom: 24px; }
.testimonial-avatar { width: 56px; height: 56px; border-radius: 50%; background: var(--gradient); color: white; display: flex; align-items: center; justify-content: center; font-size: 1.5rem; font-weight: 700; }
.testimonial-name { font-size: 1.1rem; font-weight: 700; color: var(--text-primary); }
.testimonial-role { font-size: 0.9rem; color: var(--text-tertiary); }
.testimonial-content p { font-size: 1.1rem; color: var(--text-secondary); line-height: 1.8; font-style: italic; margin-bottom: 20px; }
.testimonial-rating { color: #fbbf24; font-size: 1.2rem; letter-spacing: 2px; }
.carousel-controls { display: flex; align-items: center; justify-content: center; gap: 24px; margin-top: 32px; }
.carousel-btn { width: 48px; height: 48px; border-radius: 50%; background: white; border: 1px solid var(--border); display: flex; align-items: center; justify-content: center; cursor: pointer; transition: var(--transition); color: var(--text-secondary); }
.carousel-btn:hover { background: var(--primary); color: white; border-color: var(--primary); }
.carousel-dots { display: flex; gap: 8px; }
.carousel-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--border); cursor: pointer; transition: var(--transition); }
.carousel-dot.active { background: var(--primary); width: 24px; border-radius: 4px; }

/* CTA */
.cta { padding: 100px 0; background: var(--gradient); position: relative; overflow: hidden; }
.cta-bg-shapes { position: absolute; inset: 0; overflow: hidden; }
.cta-shape { position: absolute; border-radius: 50%; background: rgba(255, 255, 255, 0.1); }
.cta-shape.shape-1 { width: 400px; height: 400px; top: -200px; right: -100px; }
.cta-shape.shape-2 { width: 300px; height: 300px; bottom: -150px; left: -100px; }
.cta-shape.shape-3 { width: 200px; height: 200px; top: 50%; left: 50%; transform: translate(-50%, -50%); }
.cta-content { text-align: center; position: relative; z-index: 1; color: white; }
.cta-content h2 { font-size: 2.5rem; font-weight: 800; margin-bottom: 16px; }
.cta-content p { font-size: 1.2rem; opacity: 0.9; margin-bottom: 40px; }
.cta-buttons { display: flex; gap: 16px; justify-content: center; }
.cta .btn-primary { background: white; color: var(--primary); box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2); }
.cta .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3); }
.cta .btn-secondary { background: rgba(255, 255, 255, 0.2); border-color: rgba(255, 255, 255, 0.3); }
.cta .btn-secondary:hover { background: rgba(255, 255, 255, 0.3); }

/* Footer */
.footer { padding: 80px 0 40px; background: var(--text-primary); color: white; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
.footer-logo { display: flex; align-items: center; gap: 16px; margin-bottom: 20px; }
.footer-logo-name { font-size: 1.4rem; font-weight: 700; }
.footer-logo-en { font-size: 0.85rem; color: rgba(255, 255, 255, 0.6); letter-spacing: 1px; }
.footer-desc { font-size: 1.05rem; color: rgba(255, 255, 255, 0.7); line-height: 1.7; }
.footer-links h4 { font-size: 1.15rem; font-weight: 700; margin-bottom: 20px; }
.footer-links a { display: block; color: rgba(255, 255, 255, 0.7); text-decoration: none; padding: 8px 0; font-size: 1rem; transition: var(--transition); }
.footer-links a:hover { color: white; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: 32px; border-top: 1px solid rgba(255, 255, 255, 0.1); font-size: 1rem; color: rgba(255, 255, 255, 0.6); }
.footer-legal { display: flex; gap: 24px; }
.footer-legal a { color: rgba(255, 255, 255, 0.6); text-decoration: none; transition: var(--transition); }
.footer-legal a:hover { color: white; }

/* Floating Consult */
.floating-consult { position: fixed; right: 50px; bottom: 120px; z-index: 1500; display: flex; flex-direction: column; gap: 30px; align-items: center; }
.consult-btn { width: 80px; height: 80px; border-radius: 50%; border: none; cursor: pointer; display: flex; align-items: center; justify-content: center; font-size: 1.8rem; transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15); position: relative; }
.consult-btn:hover { transform: scale(1.08) translateY(-4px); box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2); }
.consult-btn.wechat { background: white; color: #07c160; border: 3px solid #07c160; box-shadow: 0 6px 20px rgba(7, 193, 96, 0.2); }
.consult-btn .tooltip { position: absolute; right: 85px; background: white; color: var(--text-primary); padding: 10px 18px; border-radius: 10px; font-size: 0.95rem; font-weight: 500; white-space: nowrap; opacity: 0; pointer-events: none; transition: all 0.3s; box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12); transform: translateX(10px); }
.consult-btn:hover .tooltip { opacity: 1; transform: translateX(0); }

/* Modal */
.modal-overlay { position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0, 0, 0, 0.5); backdrop-filter: blur(4px); z-index: 2000; display: none; align-items: center; justify-content: center; opacity: 0; transition: opacity 0.3s ease; }
.modal-overlay.active { display: flex; opacity: 1; }
.modal { background: white; border-radius: 16px; padding: 40px; max-width: 480px; width: 90%; position: relative; transform: scale(0.9); transition: transform 0.3s ease; box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3); }
.modal-overlay.active .modal { transform: scale(1); }
.modal-close { position: absolute; top: 16px; right: 16px; width: 32px; height: 32px; border: none; background: #f1f5f9; border-radius: 50%; cursor: pointer; display: flex; align-items: center; justify-content: center; font-size: 1.2rem; color: #64748b; transition: all 0.2s; }
.modal-close:hover { background: #e2e8f0; color: #1e293b; }
.modal h3 { font-size: 1.5rem; font-weight: 700; margin-bottom: 8px; color: var(--text-primary); }
.modal-subtitle { font-size: 0.95rem; color: var(--text-secondary); margin-bottom: 24px; display: flex; align-items: center; gap: 8px; justify-content: center; }
.wechat-modal .modal { text-align: center; }
.wechat-modal h3 { font-size: 1.8rem; margin-bottom: 12px; }
.wechat-qr-container { position: relative; display: inline-block; padding: 10px; background: white; border: 2px solid var(--primary); border-radius: 16px; margin-bottom: 24px; overflow: visible; }
.wechat-qr { width: 100%; height: auto; display: block; max-width: 220px; margin: 0 auto; }
.modal-footer { font-size: 1rem; color: var(--text-secondary); }

/* Animations */
.animate-on-scroll { opacity: 0; transform: translateY(30px); transition: opacity 0.7s ease, transform 0.7s ease; }
.animate-on-scroll.visible { opacity: 1; transform: translateY(0); }

/* Responsive */
@media (max-width: 1024px) {
  .features-grid, .solutions-grid, .tech-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .nav-links { display: none; position: absolute; top: 72px; left: 0; right: 0; background: white; flex-direction: column; padding: 24px; border-bottom: 1px solid var(--border); box-shadow: var(--shadow-lg); }
  .nav-links.active { display: flex; }
  .nav-toggle { display: flex; }
  .hero h1 { font-size: 2.5rem; word-break: normal; }
  .hero-container { flex-direction: column; text-align: center; gap: 40px; padding: 40px 20px; }
  .hero-content { order: 1; text-align: center; min-width: auto; max-width: 100%; flex: 0 0 100%; }
  .hero-visual { order: 2; max-width: 100%; margin: 0 auto; overflow: visible; margin-top: 20px; flex: 0 0 100%; }
  .hero-visual .robot-image { max-width: 80%; max-height: 300px; }
  .hero-buttons { flex-direction: column; }
  .features-grid, .solutions-grid, .tech-grid { grid-template-columns: 1fr; }
  .row-content { flex-direction: column !important; gap: 40px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 16px; text-align: center; }
}