/* AIXING Website Styles */
:root {
  --primary: #1a1a2e;
  --primary-light: #16213e;
  --accent: #c9a96e;
  --accent-light: #e8d5a8;
  --accent-dark: #a88a4a;
  --text: #2d2d2d;
  --text-light: #6b6b6b;
  --bg: #ffffff;
  --bg-light: #f8f7f4;
  --bg-dark: #0f0f1a;
  --border: #e8e8e8;
  --shadow: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-cn: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-en: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Playfair Display', Georgia, serif;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font-cn); color: var(--text); background: var(--bg); line-height: 1.7; overflow-x: hidden; -webkit-font-smoothing: antialiased; }
body.en { font-family: var(--font-en); }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; }

/* Navigation */
.navbar { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; padding: 20px 0; transition: var(--transition); background: transparent; }
.navbar.scrolled { background: rgba(255,255,255,0.95); backdrop-filter: blur(20px); padding: 12px 0; box-shadow: 0 2px 20px rgba(0,0,0,0.06); }
.nav-container { display: flex; align-items: center; justify-content: space-between; }
.nav-logo { display: flex; flex-direction: column; gap: 2px; }
.logo-text { font-size: 1.5rem; font-weight: 700; color: var(--accent); letter-spacing: 2px; line-height: 1.2; }
.navbar:not(.scrolled) .logo-text { color: #fff; }
.logo-sub { font-size: 0.7rem; color: rgba(255,255,255,0.7); letter-spacing: 3px; text-transform: uppercase; }
.navbar.scrolled .logo-sub { color: var(--text-light); }
.nav-menu { display: flex; list-style: none; gap: 32px; }
.nav-link { font-size: 0.9rem; font-weight: 500; color: rgba(255,255,255,0.85); position: relative; padding: 4px 0; }
.navbar.scrolled .nav-link { color: var(--text); }
.nav-link::after { content: ''; position: absolute; bottom: -2px; left: 0; width: 0; height: 2px; background: var(--accent); transition: width 0.3s ease; }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }
.nav-link:hover { color: var(--accent); }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.lang-toggle { background: rgba(255,255,255,0.15); border: 1px solid rgba(255,255,255,0.3); color: #fff; padding: 6px 14px; border-radius: 20px; cursor: pointer; font-size: 0.8rem; font-weight: 600; transition: var(--transition); }
.navbar.scrolled .lang-toggle { background: var(--bg-light); border-color: var(--border); color: var(--text); }
.lang-toggle:hover { background: var(--accent); border-color: var(--accent); color: #fff; }
.hamburger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 4px; }
.hamburger span { width: 24px; height: 2px; background: #fff; transition: var(--transition); }
.navbar.scrolled .hamburger span { background: var(--text); }

/* Hero */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; justify-content: center; overflow: hidden; background: var(--bg-dark); }
.hero-bg { position: absolute; inset: 0; background: linear-gradient(135deg, #0f0f1a 0%, #1a1a2e 30%, #16213e 60%, #1a1a2e 100%); z-index: 1; }
.hero-bg::before { content: ''; position: absolute; inset: 0; background: radial-gradient(ellipse at 20% 50%, rgba(201,169,110,0.15) 0%, transparent 50%), radial-gradient(ellipse at 80% 20%, rgba(201,169,110,0.1) 0%, transparent 40%); }
.hero-particles { position: absolute; inset: 0; z-index: 2; pointer-events: none; }
.hero-content { position: relative; z-index: 3; text-align: center; padding: 120px 24px 80px; }
.hero-badge { display: inline-block; background: rgba(201,169,110,0.15); border: 1px solid rgba(201,169,110,0.3); color: var(--accent-light); padding: 8px 24px; border-radius: 30px; font-size: 0.85rem; letter-spacing: 1px; margin-bottom: 32px; animation: fadeInUp 0.8s ease forwards; }
.hero-title { margin-bottom: 48px; animation: fadeInUp 0.8s 0.2s ease forwards; opacity: 0; }
.hero-title-main { display: block; font-family: var(--font-display); font-size: clamp(2.5rem, 6vw, 4.5rem); font-weight: 700; line-height: 1.2; margin-bottom: 16px; background: linear-gradient(135deg, #fff 0%, var(--accent-light) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-title-sub { display: block; font-size: clamp(1rem, 2vw, 1.25rem); color: rgba(255,255,255,0.6); font-weight: 300; letter-spacing: 0.5px; }
.hero-stats { display: flex; justify-content: center; gap: 48px; margin-bottom: 48px; animation: fadeInUp 0.8s 0.4s ease forwards; opacity: 0; }
.stat-item { text-align: center; }
.stat-number { display: block; font-family: var(--font-display); font-size: 2.5rem; font-weight: 700; color: var(--accent); line-height: 1.2; }
.stat-label { font-size: 0.85rem; color: rgba(255,255,255,0.5); margin-top: 4px; }
.hero-actions { display: flex; gap: 16px; justify-content: center; animation: fadeInUp 0.8s 0.6s ease forwards; opacity: 0; }
.hero-scroll { position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%); z-index: 3; text-align: center; color: rgba(255,255,255,0.4); font-size: 0.75rem; letter-spacing: 2px; }
.scroll-arrow { width: 1px; height: 40px; background: linear-gradient(to bottom, rgba(201,169,110,0.5), transparent); margin: 8px auto 0; animation: scrollBounce 2s infinite; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 14px 32px; border-radius: 30px; font-size: 0.9rem; font-weight: 600; cursor: pointer; transition: var(--transition); border: 2px solid transparent; letter-spacing: 0.5px; }
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-dark); border-color: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 8px 25px rgba(201,169,110,0.3); }
.btn-outline { background: transparent; color: #fff; border-color: rgba(255,255,255,0.3); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
.btn-full { width: 100%; }

/* Sections */
.section { padding: 100px 0; }
.section-header { text-align: center; margin-bottom: 64px; }
.section-tag { display: inline-block; font-size: 0.8rem; font-weight: 600; color: var(--accent); text-transform: uppercase; letter-spacing: 3px; margin-bottom: 12px; }
.section-title { font-size: clamp(1.8rem, 3.5vw, 2.5rem); font-weight: 700; color: var(--primary); margin-bottom: 16px; line-height: 1.3; }
.section-desc { font-size: 1rem; color: var(--text-light); max-width: 640px; margin: 0 auto; line-height: 1.8; }

/* About */
.about { background: var(--bg-light); }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; margin-bottom: 64px; }
.about-image { position: relative; }
.about-image-inner { aspect-ratio: 4/5; border-radius: var(--radius-lg); background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%); position: relative; overflow: hidden; }
.about-image-inner::before { content: ''; position: absolute; inset: 0; background: radial-gradient(circle at 30% 40%, rgba(201,169,110,0.2) 0%, transparent 60%), radial-gradient(circle at 70% 70%, rgba(201,169,110,0.1) 0%, transparent 40%); }
.about-image-inner::after { content: '仙爱尔'; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); font-size: 3rem; font-weight: 700; color: rgba(201,169,110,0.15); letter-spacing: 8px; }
body.en .about-image-inner::after { content: 'AIXING'; }
.about-badge-float { position: absolute; bottom: -20px; right: -20px; background: var(--accent); color: #fff; padding: 24px; border-radius: var(--radius); text-align: center; box-shadow: var(--shadow-lg); }
.badge-number { display: block; font-family: var(--font-display); font-size: 2.5rem; font-weight: 700; line-height: 1; }
.badge-text { font-size: 0.8rem; opacity: 0.9; }
.about-content h3 { font-size: 1.5rem; font-weight: 700; color: var(--primary); margin-bottom: 16px; line-height: 1.4; }
.about-content p { color: var(--text-light); margin-bottom: 24px; line-height: 1.8; }
.about-feature-item { display: flex; align-items: flex-start; gap: 12px; padding: 8px 0; }
.about-feature-item::before { content: '✓'; display: flex; align-items: center; justify-content: center; min-width: 24px; height: 24px; background: rgba(201,169,110,0.1); color: var(--accent); border-radius: 50%; font-size: 0.75rem; font-weight: 700; }
.about-feature-item span { font-size: 0.9rem; color: var(--text); line-height: 1.6; }
.certifications { text-align: center; }
.cert-title { font-size: 1.2rem; color: var(--primary); margin-bottom: 24px; }
.cert-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 16px; }
.cert-item { display: flex; align-items: center; gap: 8px; padding: 12px 24px; background: #fff; border-radius: 30px; font-size: 0.85rem; color: var(--text); box-shadow: var(--shadow); border: 1px solid var(--border); }
.cert-item::before { content: '🏆'; font-size: 1rem; }

/* Products */
.products { background: var(--bg); }
.category-filter { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin-bottom: 48px; }
.filter-btn { padding: 8px 20px; border: 1px solid var(--border); background: var(--bg); color: var(--text-light); border-radius: 20px; font-size: 0.85rem; cursor: pointer; transition: var(--transition); }
.filter-btn:hover, .filter-btn.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; }
.product-card { background: var(--bg); border-radius: var(--radius); overflow: hidden; cursor: pointer; transition: var(--transition); border: 1px solid var(--border); }
.product-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: var(--accent); }
.product-card-image { position: relative; aspect-ratio: 1; background: var(--bg-light); display: flex; align-items: center; justify-content: center; overflow: hidden; }
.product-card-image img { width: 80%; height: 80%; object-fit: contain; transition: transform 0.5s ease; }
.product-card:hover .product-card-image img { transform: scale(1.08); }
.product-card-overlay { position: absolute; inset: 0; background: linear-gradient(to top, rgba(26,26,46,0.8) 0%, transparent 50%); opacity: 0; transition: opacity 0.3s ease; display: flex; align-items: flex-end; justify-content: center; padding: 24px; }
.product-card:hover .product-card-overlay { opacity: 1; }
.product-card-overlay span { color: #fff; font-size: 0.85rem; font-weight: 500; padding: 8px 20px; border: 1px solid rgba(255,255,255,0.4); border-radius: 20px; }
.product-card-info { padding: 16px 20px; }
.product-card-name { font-size: 0.95rem; font-weight: 600; color: var(--text); margin-bottom: 4px; }
.product-card-cat { font-size: 0.8rem; color: var(--accent); }

/* Services */
.services { background: var(--bg-light); }
.services-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.service-card { background: #fff; padding: 40px 24px; border-radius: var(--radius); text-align: center; transition: var(--transition); border: 1px solid var(--border); }
.service-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: var(--accent); }
.service-icon { font-size: 2.5rem; margin-bottom: 16px; }
.service-title { font-size: 1.1rem; font-weight: 700; color: var(--primary); margin-bottom: 12px; }
.service-desc { font-size: 0.85rem; color: var(--text-light); line-height: 1.7; }

/* Clients */
.clients { background: var(--bg); }
.clients-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.client-card { background: var(--bg-light); padding: 32px 24px; border-radius: var(--radius); text-align: center; transition: var(--transition); border: 1px solid var(--border); }
.client-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--accent); }
.client-icon { font-size: 2rem; margin-bottom: 12px; }
.client-name { font-size: 1rem; font-weight: 600; color: var(--primary); }
.client-type { font-size: 0.8rem; color: var(--text-light); margin-top: 4px; }

/* Contact */
.contact { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%); color: #fff; }
.contact .section-tag { color: var(--accent-light); }
.contact .section-title { color: #fff; }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.contact-info { display: flex; flex-direction: column; gap: 24px; }
.contact-item { display: flex; align-items: flex-start; gap: 16px; }
.contact-item-icon { width: 48px; height: 48px; background: rgba(201,169,110,0.15); border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 1.2rem; flex-shrink: 0; }
.contact-item-label { font-size: 0.8rem; color: rgba(255,255,255,0.5); margin-bottom: 4px; text-transform: uppercase; letter-spacing: 1px; }
.contact-item-value { font-size: 1rem; color: #fff; font-weight: 500; }
.contact-form-wrap { background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1); border-radius: var(--radius-lg); padding: 32px; backdrop-filter: blur(10px); }
.contact-form h3 { font-size: 1.2rem; margin-bottom: 24px; color: #fff; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group input, .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: var(--transition); outline: none; }
.form-group input::placeholder, .form-group textarea::placeholder { color: rgba(255,255,255,0.4); }
.form-group input:focus, .form-group textarea:focus { border-color: var(--accent); background: rgba(255,255,255,0.12); }
.form-group textarea { resize: vertical; min-height: 100px; }

/* Footer */
.footer { background: #0a0a14; color: rgba(255,255,255,0.7); padding: 64px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
.footer-brand h3 { font-size: 1.5rem; color: var(--accent); margin-bottom: 8px; }
.footer-brand p { font-size: 0.85rem; margin-bottom: 16px; }
.footer-social { display: flex; align-items: center; gap: 8px; font-size: 0.9rem; }
.footer-links h4 { font-size: 0.9rem; color: #fff; margin-bottom: 16px; font-weight: 600; }
.footer-links ul { list-style: none; }
.footer-links li { margin-bottom: 8px; font-size: 0.85rem; }
.footer-links a:hover { color: var(--accent); }
.footer-bottom { text-align: center; padding-top: 24px; border-top: 1px solid rgba(255,255,255,0.08); font-size: 0.8rem; color: rgba(255,255,255,0.4); }
.icp-info { margin-top: 8px; font-size: 0.75rem; }
.icp-info a { color: rgba(255,255,255,0.4); transition: color 0.2s; }
.icp-info a:hover { color: var(--accent); }

/* Modal */
.modal { position: fixed; inset: 0; z-index: 2000; display: flex; align-items: center; justify-content: center; opacity: 0; visibility: hidden; transition: var(--transition); }
.modal.active { opacity: 1; visibility: visible; }
.modal-overlay { position: absolute; inset: 0; background: rgba(0,0,0,0.7); backdrop-filter: blur(8px); }
.modal-content { position: relative; background: #fff; border-radius: var(--radius-lg); max-width: 900px; width: 90%; max-height: 85vh; overflow-y: auto; transform: scale(0.9) translateY(20px); transition: transform 0.3s ease; }
.modal.active .modal-content { transform: scale(1) translateY(0); }
.modal-close { position: absolute; top: 16px; right: 16px; width: 40px; height: 40px; background: rgba(0,0,0,0.05); border: none; border-radius: 50%; font-size: 1.5rem; cursor: pointer; display: flex; align-items: center; justify-content: center; z-index: 10; color: var(--text); transition: var(--transition); }
.modal-close:hover { background: var(--accent); color: #fff; }
.modal-body { display: grid; grid-template-columns: 1fr 1fr; }
.modal-image { background: var(--bg-light); display: flex; align-items: center; justify-content: center; padding: 40px; border-radius: var(--radius-lg) 0 0 var(--radius-lg); }
.modal-image img { max-width: 100%; max-height: 400px; object-fit: contain; }
.modal-info { padding: 40px; }
.modal-info h2 { font-size: 1.5rem; font-weight: 700; color: var(--primary); margin-bottom: 8px; }
.modal-category { display: inline-block; font-size: 0.8rem; color: var(--accent); background: rgba(201,169,110,0.1); padding: 4px 12px; border-radius: 12px; margin-bottom: 16px; }
.modal-desc { font-size: 0.9rem; color: var(--text-light); line-height: 1.8; margin-bottom: 24px; }
.modal-specs { background: var(--bg-light); padding: 16px; border-radius: 8px; margin-bottom: 24px; font-size: 0.85rem; color: var(--text); line-height: 1.6; }
.modal-specs::before { content: '📋 '; }

/* Back to top */
.back-to-top { position: fixed; bottom: 32px; right: 32px; width: 48px; height: 48px; background: var(--accent); color: #fff; border: none; border-radius: 50%; font-size: 1.2rem; cursor: pointer; opacity: 0; visibility: hidden; transform: translateY(20px); transition: var(--transition); box-shadow: var(--shadow); z-index: 100; }
.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--accent-dark); transform: translateY(-4px); }

/* Animations */
@keyframes fadeInUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
@keyframes scrollBounce { 0%, 100% { transform: translateY(0); opacity: 1; } 50% { transform: translateY(10px); opacity: 0.5; } }
.fade-in { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* Toast */
.toast { position: fixed; bottom: 32px; left: 50%; transform: translateX(-50%) translateY(100px); background: var(--primary); color: #fff; padding: 12px 24px; border-radius: 8px; font-size: 0.9rem; z-index: 3000; transition: transform 0.3s; box-shadow: var(--shadow-lg); }
.toast.show { transform: translateX(-50%) translateY(0); }

/* Responsive */
@media (max-width: 1024px) {
  .services-grid, .clients-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 768px) {
  .nav-menu { position: fixed; top: 0; right: -100%; width: 80%; max-width: 320px; height: 100vh; background: var(--bg); flex-direction: column; padding: 80px 32px 32px; gap: 0; transition: right 0.3s ease; box-shadow: -10px 0 30px rgba(0,0,0,0.1); }
  .nav-menu.open { right: 0; }
  .nav-link { color: var(--text) !important; display: block; padding: 12px 0; border-bottom: 1px solid var(--border); }
  .hamburger { display: flex; }
  .hero-stats { flex-wrap: wrap; gap: 24px; }
  .stat-item { width: calc(50% - 12px); }
  .hero-actions { flex-direction: column; align-items: center; }
  .about-grid { grid-template-columns: 1fr; gap: 32px; }
  .about-image { order: -1; }
  .about-image-inner { aspect-ratio: 16/9; }
  .product-grid { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 16px; }
  .services-grid { grid-template-columns: 1fr; }
  .clients-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .modal-body { grid-template-columns: 1fr; }
  .modal-image { border-radius: var(--radius-lg) var(--radius-lg) 0 0; padding: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .form-row { grid-template-columns: 1fr; }
  .section { padding: 64px 0; }
}
@media (max-width: 480px) {
  .product-grid { grid-template-columns: 1fr; }
  .clients-grid { grid-template-columns: 1fr; }
  .cert-grid { flex-direction: column; align-items: center; }
}