* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --primary: #1a5fb4;
  --primary-light: #3584e4;
  --primary-dark: #0d3b7a;
  --accent: #00d4ff;
  --text-dark: #1a1a2e;
  --text-light: #666;
  --bg-light: #f0f4f8;
  --bg-white: #ffffff;
  --gradient-primary: linear-gradient(135deg, #1a5fb4 0%, #0d3b7a 100%);
  --gradient-hero: linear-gradient(135deg, #0d1b2a 0%, #1a5fb4 50%, #0d3b7a 100%);
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.6; color: var(--text-dark); background-color: var(--bg-light); overflow-x: hidden;
}

/* ===== NAVBAR ===== */
.navbar {
  position: fixed; top: 0; width: 100%; background: rgba(255,255,255,0.95); backdrop-filter: blur(20px);
  box-shadow: 0 2px 30px rgba(0,0,0,0.08); z-index: 1000; padding: 12px 0; transition: all 0.3s ease;
}
.nav-container { max-width: 1280px; margin: 0 auto; padding: 0 30px; display: flex; justify-content: space-between; align-items: center; }
.logo { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.logo-icon { width: 44px; height: 44px; background: var(--gradient-primary); border-radius: 12px; display: flex; align-items: center; justify-content: center; color: white; font-weight: 700; font-size: 18px; box-shadow: 0 4px 15px rgba(26,95,180,0.3); }
.logo-name { font-size: 20px; font-weight: 700; color: var(--text-dark); }
.nav-links { display: flex; gap: 8px; list-style: none; align-items: center; }
.nav-links > li { position: relative; }
.nav-links a { text-decoration: none; color: var(--text-dark); font-weight: 500; font-size: 15px; transition: all 0.3s; position: relative; padding: 8px 16px; border-radius: 8px; display: block; }
.nav-links a:hover { color: var(--primary); background: rgba(26,95,180,0.05); }
.nav-links .nav-cta { padding: 10px 24px; background: var(--gradient-primary); color: white !important; border-radius: 8px; font-weight: 600; transition: all 0.3s; box-shadow: 0 4px 15px rgba(26,95,180,0.3); }
.nav-links .nav-cta:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(26,95,180,0.4); background: var(--gradient-primary) !important; }
.nav-links a.active { color: var(--primary); background: rgba(26,95,180,0.08); font-weight: 600; }
.dropdown-menu {
  position: absolute; top: 100%; left: 0; background: white; border-radius: 12px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.12); padding: 8px 0; min-width: 200px;
  opacity: 0; visibility: hidden; transform: translateY(-10px); transition: all 0.3s ease;
  z-index: 1001; border: 1px solid rgba(0,0,0,0.05);
}
.nav-links > li:hover .dropdown-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown-menu a { padding: 10px 20px; font-size: 14px; border-radius: 0; display: flex; align-items: center; gap: 10px; }
.dropdown-menu a:hover { background: rgba(26,95,180,0.06); }
.dropdown-menu .menu-icon { width: 28px; height: 28px; background: linear-gradient(135deg, rgba(26,95,180,0.1), rgba(0,212,255,0.1)); border-radius: 6px; display: flex; align-items: center; justify-content: center; font-size: 14px; }
.dropdown-divider { height: 1px; background: rgba(0,0,0,0.06); margin: 6px 0; }
.mobile-menu-btn { display: none; background: none; border: none; font-size: 24px; cursor: pointer; color: var(--text-dark); }

/* ===== HERO ===== */
.hero { margin-top: 68px; min-height: calc(100vh - 68px); background: var(--gradient-hero); color: white; display: flex; align-items: center; position: relative; overflow: hidden; padding: 80px 30px; }
.hero::before { content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0; background: radial-gradient(circle at 20% 50%, rgba(0,212,255,0.08) 0%, transparent 50%), radial-gradient(circle at 80% 20%, rgba(26,95,180,0.15) 0%, transparent 50%), radial-gradient(circle at 50% 80%, rgba(0,212,255,0.05) 0%, transparent 40%); }
.hero-particles { position: absolute; top: 0; left: 0; right: 0; bottom: 0; overflow: hidden; }
.particle { position: absolute; width: 4px; height: 4px; background: rgba(0,212,255,0.6); border-radius: 50%; animation: float-particle 15s infinite ease-in-out; }
.particle:nth-child(1) { left: 10%; top: 20%; animation-delay: 0s; }
.particle:nth-child(2) { left: 25%; top: 60%; animation-delay: 2s; }
.particle:nth-child(3) { left: 40%; top: 30%; animation-delay: 4s; }
.particle:nth-child(4) { left: 55%; top: 70%; animation-delay: 1s; }
.particle:nth-child(5) { left: 70%; top: 40%; animation-delay: 3s; }
.particle:nth-child(6) { left: 85%; top: 15%; animation-delay: 5s; }
.particle:nth-child(7) { left: 15%; top: 80%; animation-delay: 2.5s; }
.particle:nth-child(8) { left: 60%; top: 10%; animation-delay: 1.5s; }
.particle:nth-child(9) { left: 90%; top: 55%; animation-delay: 3.5s; }
.particle:nth-child(10) { left: 35%; top: 85%; animation-delay: 0.5s; }
@keyframes float-particle { 0%,100% { transform: translate(0,0) scale(1); opacity: 0.6; } 25% { transform: translate(30px,-20px) scale(1.2); opacity: 0.8; } 50% { transform: translate(-20px,30px) scale(0.8); opacity: 0.4; } 75% { transform: translate(20px,20px) scale(1.1); opacity: 0.7; } }
.hero-grid { max-width: 1280px; margin: 0 auto; width: 100%; display: grid; grid-template-columns: 1.2fr 1fr; gap: 60px; align-items: center; position: relative; z-index: 1; }
.hero-content h1 { font-size: 56px; font-weight: 700; line-height: 1.15; margin-bottom: 20px; }
.hero-content h1 .highlight { background: linear-gradient(90deg, #00d4ff, #7dd3fc); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-mission { font-size: 18px; opacity: 0.85; margin-bottom: 20px; display: flex; align-items: center; gap: 10px; }
.hero-mission .star-icon { color: #00d4ff; font-size: 20px; }
.hero-desc { font-size: 16px; opacity: 0.7; line-height: 1.8; margin-bottom: 40px; max-width: 540px; }
.hero-buttons { display: flex; gap: 20px; }
.btn { padding: 14px 36px; border-radius: 10px; font-size: 16px; font-weight: 600; text-decoration: none; transition: all 0.3s ease; cursor: pointer; border: none; display: inline-flex; align-items: center; gap: 8px; }
.btn-primary { background: linear-gradient(135deg, #00d4ff, #1a5fb4); color: white; box-shadow: 0 4px 20px rgba(0,212,255,0.3); }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 8px 30px rgba(0,212,255,0.4); }
.btn-outline { background: transparent; color: white; border: 2px solid rgba(255,255,255,0.3); }
.btn-outline:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.6); }
.btn-secondary { background: var(--gradient-primary); color: white; box-shadow: 0 4px 15px rgba(26,95,180,0.3); }
.btn-secondary:hover { transform: translateY(-3px); box-shadow: 0 8px 25px rgba(26,95,180,0.4); }
.hero-visual { position: relative; display: flex; justify-content: center; align-items: center; }
.robot-ring { width: 400px; height: 400px; position: relative; }
.ring-outer { position: absolute; width: 100%; height: 100%; border: 2px solid rgba(0,212,255,0.2); border-radius: 50%; animation: rotate 20s linear infinite; }
.ring-outer::before, .ring-outer::after { content: ''; position: absolute; border-radius: 50%; border: 2px solid rgba(0,212,255,0.15); }
.ring-outer::before { width: 70%; height: 70%; top: 15%; left: 15%; animation: rotate 15s linear infinite reverse; }
.ring-outer::after { width: 40%; height: 40%; top: 30%; left: 30%; animation: rotate 10s linear infinite; }
.ring-center { position: absolute; width: 120px; height: 120px; background: linear-gradient(135deg, rgba(0,212,255,0.2), rgba(26,95,180,0.3)); border-radius: 50%; top: 50%; left: 50%; transform: translate(-50%,-50%); display: flex; align-items: center; justify-content: center; border: 2px solid rgba(0,212,255,0.4); box-shadow: 0 0 40px rgba(0,212,255,0.2); }
.ring-center .logo-inner { width: 60px; height: 60px; background: var(--gradient-primary); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: white; font-weight: 700; font-size: 22px; }
.orbit-dot { position: absolute; width: 12px; height: 12px; background: #00d4ff; border-radius: 50%; box-shadow: 0 0 15px rgba(0,212,255,0.8); }
.orbit-dot:nth-child(2) { top: 10%; left: 50%; transform: translateX(-50%); }
.orbit-dot:nth-child(3) { bottom: 10%; left: 50%; transform: translateX(-50%); }
.orbit-dot:nth-child(4) { left: 10%; top: 50%; transform: translateY(-50%); }
.orbit-dot:nth-child(5) { right: 10%; top: 50%; transform: translateY(-50%); }
@keyframes rotate { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

/* ===== PAGE HEADER ===== */
.page-header {
  margin-top: 68px; padding: 100px 30px 80px; background: var(--gradient-hero);
  color: white; text-align: center; position: relative; overflow: hidden;
}
.page-header::before { content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0; background: radial-gradient(circle at 20% 50%, rgba(0,212,255,0.08) 0%, transparent 50%), radial-gradient(circle at 80% 20%, rgba(26,95,180,0.15) 0%, transparent 50%); }
.page-header-content { position: relative; z-index: 1; max-width: 800px; margin: 0 auto; }
.page-header h1 { font-size: 48px; font-weight: 700; margin-bottom: 16px; }
.page-header p { font-size: 18px; opacity: 0.85; line-height: 1.8; }
.page-header .header-tags { display: flex; gap: 12px; justify-content: center; margin-top: 24px; flex-wrap: wrap; }
.page-header .header-tags span { padding: 6px 16px; background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.2); border-radius: 20px; font-size: 13px; }

/* ===== SECTION COMMON ===== */
.section { padding: 80px 30px; max-width: 1280px; margin: 0 auto; }
.section-title { text-align: center; margin-bottom: 60px; }
.section-title h2 { font-size: 36px; color: var(--text-dark); margin-bottom: 16px; font-weight: 700; }
.section-title p { font-size: 17px; color: var(--text-light); max-width: 700px; margin: 0 auto; line-height: 1.7; }
.section-title .line { width: 60px; height: 4px; background: var(--gradient-primary); margin: 20px auto 0; border-radius: 2px; }
.section-title .subtitle-tag { display: inline-block; padding: 6px 18px; background: rgba(26,95,180,0.08); color: var(--primary); border-radius: 20px; font-size: 13px; font-weight: 600; margin-bottom: 16px; letter-spacing: 2px; }

/* ===== CARDS ===== */
.card-grid { display: grid; gap: 24px; }
.card-grid-2 { grid-template-columns: repeat(2, 1fr); }
.card-grid-3 { grid-template-columns: repeat(3, 1fr); }
.card-grid-4 { grid-template-columns: repeat(4, 1fr); }
.info-card { background: var(--bg-white); border-radius: 20px; padding: 36px 30px; box-shadow: 0 4px 20px rgba(0,0,0,0.06); transition: all 0.4s ease; border: 1px solid rgba(0,0,0,0.04); }
.info-card:hover { transform: translateY(-6px); box-shadow: 0 20px 50px rgba(26,95,180,0.12); }
.info-card-icon { width: 56px; height: 56px; background: linear-gradient(135deg, rgba(26,95,180,0.1), rgba(0,212,255,0.1)); border-radius: 14px; display: flex; align-items: center; justify-content: center; font-size: 26px; margin-bottom: 20px; transition: all 0.3s; }
.info-card:hover .info-card-icon { background: var(--gradient-primary); color: white; transform: scale(1.1); }
.info-card h3 { font-size: 20px; color: var(--text-dark); margin-bottom: 12px; font-weight: 600; }
.info-card p { color: var(--text-light); font-size: 15px; line-height: 1.7; }
.info-card ul { margin-top: 16px; }
.info-card ul li { font-size: 14px; color: var(--text-light); margin-bottom: 8px; padding-left: 20px; position: relative; }
.info-card ul li::before { content: '✓'; position: absolute; left: 0; color: var(--primary); font-weight: 700; }
.info-card .card-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.info-card .card-tags span { padding: 4px 12px; background: rgba(26,95,180,0.06); border-radius: 6px; font-size: 12px; color: var(--text-light); }

/* ===== TIMELINE ===== */
.timeline { position: relative; padding-left: 40px; }
.timeline::before { content: ''; position: absolute; left: 12px; top: 0; bottom: 0; width: 2px; background: linear-gradient(to bottom, var(--primary), var(--accent)); }
.timeline-item { position: relative; margin-bottom: 40px; padding-left: 30px; }
.timeline-item::before { content: ''; position: absolute; left: -34px; top: 4px; width: 16px; height: 16px; background: var(--gradient-primary); border-radius: 50%; border: 3px solid white; box-shadow: 0 0 0 3px rgba(26,95,180,0.2); }
.timeline-item h3 { font-size: 20px; color: var(--text-dark); margin-bottom: 8px; }
.timeline-item p { color: var(--text-light); font-size: 15px; line-height: 1.7; }

/* ===== STATS BAR ===== */
.stats-bar { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin: 60px 0; }
.stat-box { background: var(--bg-white); padding: 30px 20px; border-radius: 16px; text-align: center; box-shadow: 0 4px 20px rgba(0,0,0,0.05); border: 1px solid rgba(26,95,180,0.08); }
.stat-box .num { font-size: 36px; font-weight: 700; color: var(--primary); display: block; }
.stat-box .label { font-size: 14px; color: var(--text-light); margin-top: 6px; }

/* ===== IMAGE SHOWCASE ===== */
.img-showcase { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; margin-bottom: 60px; }
.img-showcase.reverse { direction: rtl; }
.img-showcase.reverse > * { direction: ltr; }
.showcase-img { width: 100%; height: 350px; background: linear-gradient(135deg, #e8f0fe, #d2e3fc); border-radius: 20px; display: flex; align-items: center; justify-content: center; font-size: 80px; box-shadow: 0 20px 60px rgba(26,95,180,0.12); }
.showcase-content h3 { font-size: 28px; color: var(--text-dark); margin-bottom: 16px; }
.showcase-content p { color: var(--text-light); font-size: 16px; line-height: 1.8; margin-bottom: 16px; }
.showcase-content ul li { font-size: 15px; color: var(--text-light); margin-bottom: 10px; padding-left: 20px; position: relative; }
.showcase-content ul li::before { content: '▸'; position: absolute; left: 0; color: var(--primary); }

/* ===== PRODUCTS ===== */
.products-category { margin-bottom: 60px; }
.category-header { display: flex; align-items: center; gap: 16px; margin-bottom: 30px; padding: 20px 24px; background: linear-gradient(135deg, rgba(26,95,180,0.05), rgba(0,212,255,0.03)); border-radius: 16px; border: 1px solid rgba(26,95,180,0.08); }
.category-icon { width: 52px; height: 52px; background: var(--gradient-primary); border-radius: 14px; display: flex; align-items: center; justify-content: center; color: white; font-size: 26px; }
.category-title { font-size: 24px; font-weight: 700; color: var(--text-dark); }
.category-desc { font-size: 14px; color: var(--text-light); margin-top: 4px; }
.products-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.product-card { background: var(--bg-white); border-radius: 20px; overflow: hidden; box-shadow: 0 4px 20px rgba(0,0,0,0.06); transition: all 0.4s ease; border: 1px solid rgba(0,0,0,0.04); display: flex; flex-direction: column; }
.product-card:hover { transform: translateY(-8px); box-shadow: 0 20px 60px rgba(26,95,180,0.15); }
.product-image { width: 100%; height: 200px; background: linear-gradient(135deg, #f0f4f8, #e8f0fe); display: flex; align-items: center; justify-content: center; font-size: 60px; position: relative; overflow: hidden; }
.product-content { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.product-tag { display: inline-block; padding: 4px 12px; background: rgba(26,95,180,0.08); color: var(--primary); border-radius: 6px; font-size: 12px; font-weight: 600; margin-bottom: 12px; width: fit-content; }
.product-card h3 { font-size: 18px; color: var(--text-dark); margin-bottom: 10px; font-weight: 600; }
.product-desc { color: var(--text-light); font-size: 14px; line-height: 1.7; margin-bottom: 16px; flex: 1; }
.product-features { margin-bottom: 16px; }
.product-features li { font-size: 13px; color: var(--text-light); margin-bottom: 6px; padding-left: 16px; position: relative; line-height: 1.5; }
.product-features li::before { content: '✓'; position: absolute; left: 0; color: var(--primary); font-weight: 700; }
.product-specs { display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; }
.product-specs span { padding: 4px 10px; background: var(--bg-light); border-radius: 6px; font-size: 12px; color: var(--text-light); border: 1px solid rgba(0,0,0,0.05); }
.product-specs span.highlight-spec { background: rgba(0,212,255,0.1); color: var(--primary-dark); border-color: rgba(0,212,255,0.2); font-weight: 600; }

/* ===== CONTACT FORM ===== */
.contact-form { background: linear-gradient(135deg, #0d1b2a, #1a3a5c); padding: 45px; border-radius: 24px; color: white; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; margin-bottom: 8px; font-size: 14px; opacity: 0.9; font-weight: 500; }
.form-group input, .form-group textarea, .form-group select { width: 100%; padding: 14px 18px; border: 1px solid rgba(255,255,255,0.15); border-radius: 12px; background: rgba(255,255,255,0.05); color: white; font-size: 15px; transition: all 0.3s; font-family: inherit; }
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { outline: none; border-color: rgba(0,212,255,0.5); background: rgba(255,255,255,0.1); box-shadow: 0 0 20px rgba(0,212,255,0.1); }
.form-group input::placeholder, .form-group textarea::placeholder { color: rgba(255,255,255,0.35); }
.form-group textarea { min-height: 120px; resize: vertical; }
.submit-btn { width: 100%; padding: 16px; background: linear-gradient(135deg, #00d4ff, #1a5fb4); color: white; border: none; border-radius: 12px; font-size: 16px; font-weight: 600; cursor: pointer; transition: all 0.3s; margin-top: 10px; }
.submit-btn:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(0,212,255,0.3); }

/* ===== FOOTER ===== */
.footer { background: #060d18; color: rgba(255,255,255,0.5); padding: 60px 30px 30px; }
.footer-grid { max-width: 1280px; margin: 0 auto; display: grid; grid-template-columns: 2fr 1fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand .logo { margin-bottom: 20px; display: flex; align-items: center; gap: 12px; text-decoration: none; }
.footer-brand .logo-icon { width: 44px; height: 44px; background: var(--gradient-primary); border-radius: 12px; display: flex; align-items: center; justify-content: center; color: white; font-weight: 700; font-size: 18px; }
.footer-brand .logo-name { font-size: 20px; font-weight: 700; color: white; }
.footer-brand p { font-size: 14px; line-height: 1.8; margin-bottom: 20px; max-width: 320px; }
.social-links { display: flex; gap: 12px; }
.social-links a { width: 42px; height: 42px; background: rgba(255,255,255,0.08); border-radius: 10px; display: flex; align-items: center; justify-content: center; color: white; text-decoration: none; transition: all 0.3s; font-size: 16px; border: 1px solid rgba(255,255,255,0.1); }
.social-links a:hover { background: var(--primary); border-color: var(--primary); transform: translateY(-3px); }
.footer-links h4 { color: white; font-size: 16px; margin-bottom: 25px; font-weight: 600; }
.footer-links ul { list-style: none; }
.footer-links li { margin-bottom: 14px; }
.footer-links a { color: rgba(255,255,255,0.5); text-decoration: none; font-size: 14px; transition: all 0.3s; display: flex; align-items: center; gap: 8px; }
.footer-links a:hover { color: #00d4ff; transform: translateX(5px); }
.footer-bottom { max-width: 1280px; margin: 0 auto; padding-top: 30px; border-top: 1px solid rgba(255,255,255,0.08); text-align: center; font-size: 13px; }

/* ===== DARK SECTION ===== */
.dark-section { background: linear-gradient(135deg, #0d1b2a 0%, #1a3a5c 100%); color: white; }
.dark-section .section-title h2 { color: white; }
.dark-section .section-title p { color: rgba(255,255,255,0.7); }
.dark-section .line { background: linear-gradient(90deg, #00d4ff, #1a5fb4); }

/* ===== BREADCRUMB ===== */
.breadcrumb { max-width: 1280px; margin: 0 auto; padding: 20px 30px; display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--text-light); }
.breadcrumb a { color: var(--primary); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb .sep { color: #ccc; }
.breadcrumb .current { color: var(--text-dark); font-weight: 500; }

/* ===== RESPONSIVE ===== */
@media (max-width: 1200px) {
  .card-grid-2, .card-grid-3, .card-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .products-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; text-align: center; }
  .hero-content h1 { font-size: 42px; }
  .hero-desc { margin-left: auto; margin-right: auto; }
  .hero-buttons { justify-content: center; }
  .robot-ring { width: 300px; height: 300px; margin: 0 auto; }
  .img-showcase, .img-showcase.reverse { grid-template-columns: 1fr; direction: ltr; }
  .page-header h1 { font-size: 36px; }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
  .nav-links { display: none; }
  .mobile-menu-btn { display: block; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .form-row { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .hero { padding: 60px 20px; }
  .hero-content h1 { font-size: 32px; }
  .hero-buttons { flex-direction: column; align-items: center; }
  .btn { width: 100%; justify-content: center; }
  .page-header { padding: 60px 20px 50px; }
  .page-header h1 { font-size: 28px; }
  .section { padding: 50px 20px; }
  .section-title h2 { font-size: 26px; }
  .card-grid-2, .card-grid-3, .card-grid-4, .products-grid { grid-template-columns: 1fr; }
  .stats-bar { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .contact-form { padding: 25px; }
  .category-header { flex-direction: column; align-items: flex-start; }
  .breadcrumb { padding: 16px 20px; font-size: 13px; }
}
html { scroll-behavior: smooth; }