:root {
  --bg: #f6f8fc;
  --surface: #ffffff;
  --text: #102033;
  --muted: #65758b;
  --line: #dde6f1;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --secondary: #0ea5e9;
  --accent: #14b8a6;
  --dark: #0b1220;
  --dark-2: #111b2f;
  --shadow: 0 24px 70px rgba(15, 23, 42, .14);
  --radius: 22px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}
a { color: inherit; text-decoration: none; }
.container { width: min(1160px, calc(100% - 40px)); margin: 0 auto; }
.section { padding: 88px 0; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(246, 248, 252, .82);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(221, 230, 241, .8);
}
.header-inner { height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 800; letter-spacing: -.02em; }
.brand-mark { width: 38px; height: 38px; display: grid; place-items: center; border-radius: 12px; color: #fff; background: linear-gradient(135deg, var(--primary), var(--accent)); box-shadow: 0 10px 25px rgba(37,99,235,.28); }
.desktop-nav { display: flex; gap: 28px; color: var(--muted); font-size: 15px; }
.desktop-nav a:hover { color: var(--primary); }
.header-actions { display: flex; align-items: center; gap: 10px; }
.lang-toggle, .menu-btn { border: 1px solid var(--line); background: var(--surface); color: var(--text); border-radius: 12px; padding: 10px 13px; cursor: pointer; font-weight: 700; }
.menu-btn { display: none; font-size: 20px; }
.mobile-nav { display: none; padding: 0 20px 18px; border-top: 1px solid var(--line); background: var(--surface); }
.mobile-nav.open { display: grid; gap: 10px; }
.mobile-nav a { padding: 10px 0; color: var(--muted); }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 42px; padding: 0 18px; border-radius: 13px; border: 1px solid transparent; font-weight: 700; cursor: pointer; transition: .2s ease; }
.btn-primary { color: #fff; background: linear-gradient(135deg, var(--primary), var(--secondary)); box-shadow: 0 14px 30px rgba(37,99,235,.26); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 18px 40px rgba(37,99,235,.32); }
.btn-secondary { color: var(--primary); background: #eaf2ff; border-color: #d8e8ff; }
.btn-ghost { color: var(--muted); background: transparent; border-color: var(--line); }
.btn-lg { min-height: 54px; padding: 0 24px; border-radius: 16px; }
.btn-full { width: 100%; }
.hero { padding: 98px 0 72px; background: radial-gradient(circle at 12% 12%, rgba(37,99,235,.14), transparent 32%), radial-gradient(circle at 80% 20%, rgba(20,184,166,.16), transparent 34%); }
.hero-grid { display: grid; grid-template-columns: 1.02fr .98fr; align-items: center; gap: 48px; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; color: var(--primary); background: rgba(37,99,235,.09); border: 1px solid rgba(37,99,235,.12); padding: 7px 12px; border-radius: 999px; font-size: 13px; font-weight: 800; }
h1, h2, h3, p { margin-top: 0; }
h1 { font-size: clamp(42px, 6vw, 68px); line-height: 1.03; letter-spacing: -.05em; margin: 18px 0 22px; }
h2 { font-size: clamp(30px, 4vw, 46px); line-height: 1.12; letter-spacing: -.04em; margin: 14px 0; }
h3 { font-size: 21px; line-height: 1.2; margin-bottom: 10px; }
.hero-subtitle, .section-head p, .deployment p, .contact-card p { color: var(--muted); font-size: 18px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin: 30px 0 24px; }
.hero-points { display: flex; flex-wrap: wrap; gap: 10px; }
.hero-points span { padding: 9px 12px; border-radius: 999px; background: var(--surface); border: 1px solid var(--line); color: var(--muted); font-size: 14px; }
.hero-panel { position: relative; min-height: 560px; display: grid; place-items: center; }
.phone-card { width: min(360px, 100%); background: #fff; border: 12px solid #111827; border-radius: 38px; padding: 18px; box-shadow: var(--shadow); }
.phone-top { display: flex; justify-content: center; gap: 6px; margin-bottom: 18px; }
.dot { width: 6px; height: 6px; border-radius: 50%; background: #cbd5e1; }
.app-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.app-head small { display: block; color: var(--muted); }
.badge { background: #dcfce7; color: #15803d; padding: 4px 8px; border-radius: 999px; font-size: 12px; font-weight: 800; }
.search-bar { color: var(--muted); background: #f1f5f9; padding: 13px 14px; border-radius: 16px; margin-bottom: 14px; }
.ad-card { display: flex; align-items: center; gap: 12px; padding: 14px; border: 1px solid var(--line); border-radius: 18px; margin-bottom: 12px; }
.ad-card.featured { background: linear-gradient(135deg, #eff6ff, #f0fdfa); border-color: #bfdbfe; }
.card-logo { width: 44px; height: 44px; display: grid; place-items: center; border-radius: 14px; background: var(--dark); color: #fff; font-weight: 900; font-size: 20px; }
.ad-card p { margin: 0; color: var(--muted); font-size: 13px; }
.ad-card button { margin-left: auto; border: 0; background: var(--primary); color: #fff; border-radius: 11px; padding: 9px 12px; font-weight: 800; }
.dashboard-card { margin-top: 18px; padding: 16px; border-radius: 18px; background: var(--dark); color: #fff; display: flex; justify-content: space-between; align-items: center; }
.dashboard-card span { color: #93c5fd; display: block; font-size: 13px; }
.amount { color: #5eead4; font-weight: 900; }
.floating-card { position: absolute; width: 220px; background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 16px; box-shadow: 0 20px 50px rgba(15,23,42,.16); }
.floating-card small { color: var(--muted); display: block; margin-bottom: 4px; }
.card-a { top: 62px; right: 20px; }
.card-b { bottom: 70px; left: 10px; }
.stats-section { padding: 0 0 48px; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.stat { background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 20px; }
.stat strong { display: block; color: var(--primary); font-size: 18px; }
.stat span { color: var(--muted); font-size: 14px; }
.section-head { max-width: 760px; margin: 0 auto 42px; text-align: center; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.feature-card, .price-card, details { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; box-shadow: 0 10px 30px rgba(15,23,42,.05); }
.feature-card p, .role-card li, .price-card li, details p { color: var(--muted); }
.icon { width: 46px; height: 46px; display: grid; place-items: center; margin-bottom: 18px; border-radius: 15px; background: #eff6ff; color: var(--primary); font-weight: 900; }
.split-section { background: #fff; }
.split-grid, .deploy-grid, .contact-card { display: grid; grid-template-columns: .95fr 1.05fr; gap: 44px; align-items: center; }
.timeline { margin-top: 28px; display: grid; gap: 14px; }
.timeline-item { display: flex; gap: 14px; align-items: flex-start; }
.timeline-item span { width: 34px; height: 34px; flex: none; display: grid; place-items: center; border-radius: 50%; background: var(--primary); color: #fff; font-weight: 900; }
.timeline-item p { margin: 3px 0 0; color: var(--muted); }
.flow-box { background: linear-gradient(135deg, #0f172a, #1e293b); color: #fff; border-radius: 32px; padding: 34px; box-shadow: var(--shadow); }
.flow-row { display: grid; grid-template-columns: 1fr 32px 1fr; align-items: center; gap: 14px; margin-bottom: 16px; }
.flow-row span { background: rgba(255,255,255,.09); border: 1px solid rgba(255,255,255,.12); border-radius: 18px; padding: 18px; text-align: center; font-weight: 800; }
.flow-row b { color: #5eead4; text-align: center; font-size: 22px; }
.flow-result { margin-top: 24px; text-align: center; background: rgba(20,184,166,.16); border: 1px solid rgba(94,234,212,.28); color: #ccfbf1; padding: 16px; border-radius: 18px; font-weight: 900; }
.dark-section { background: var(--dark); color: #fff; }
.section-head.light p, .dark-section .eyebrow { color: #dbeafe; }
.role-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.role-card { background: var(--dark-2); border: 1px solid rgba(255,255,255,.1); border-radius: var(--radius); padding: 28px; }
.role-card.highlight { background: linear-gradient(135deg, rgba(37,99,235,.9), rgba(14,165,233,.78)); }
.role-card ul, .price-card ul { margin: 20px 0 0; padding-left: 20px; }
.pricing-grid { display: grid; grid-template-columns: 1.04fr .96fr; gap: 22px; align-items: stretch; }
.price-card { position: relative; }
.main-price { border: 2px solid rgba(37,99,235,.38); box-shadow: 0 24px 70px rgba(37,99,235,.15); }
.price-tag { position: absolute; right: 22px; top: 22px; background: #dcfce7; color: #15803d; border-radius: 999px; padding: 6px 12px; font-weight: 900; font-size: 13px; }
.price { font-size: 42px; font-weight: 900; letter-spacing: -.04em; color: var(--primary); margin: 8px 0 18px; }
.price span { font-size: 16px; color: var(--muted); font-weight: 700; letter-spacing: 0; }
.deployment { background: #edf4ff; }
.deploy-list { display: grid; gap: 12px; }
.deploy-list div { display: flex; align-items: center; gap: 16px; background: #fff; border: 1px solid #dbeafe; border-radius: 18px; padding: 18px; }
.deploy-list strong { width: 42px; height: 42px; border-radius: 14px; display: grid; place-items: center; color: #fff; background: var(--primary); }
.faq-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
details { padding: 0; overflow: hidden; }
summary { padding: 22px 24px; cursor: pointer; font-weight: 900; }
details p { padding: 0 24px 22px; margin: 0; }
.contact-section { padding-bottom: 110px; }
.contact-card { background: linear-gradient(135deg, #fff, #eef6ff); border: 1px solid #dbeafe; border-radius: 32px; padding: 42px; box-shadow: var(--shadow); }
.lead-form { display: grid; gap: 12px; }
input, select, textarea { width: 100%; border: 1px solid var(--line); border-radius: 15px; padding: 14px 16px; font: inherit; color: var(--text); background: #fff; }
textarea { min-height: 110px; resize: vertical; }
.form-note { margin: 0; font-size: 13px !important; }
.site-footer { padding: 34px 0; background: var(--dark); color: #fff; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 24px; }
.footer-inner p { margin: 4px 0 0; color: #94a3b8; }
.footer-links { display: flex; gap: 20px; color: #cbd5e1; }
.lang-menu.show { display: block !important; }
@media (max-width: 960px) {
  .desktop-nav, .header-actions { display: none; }
  .menu-btn { display: block; }
  .hero-grid, .split-grid, .deploy-grid, .contact-card { grid-template-columns: 1fr; }
  .hero-panel { min-height: 500px; }
  .stats-grid, .feature-grid, .role-grid, .pricing-grid, .faq-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .container { width: min(100% - 24px, 1160px); }
  .section { padding: 62px 0; }
  .stats-grid, .feature-grid, .role-grid, .pricing-grid, .faq-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; }
  .btn-lg { width: 100%; }
  .floating-card { display: none; }
  .flow-row { grid-template-columns: 1fr; }
  .flow-row b { transform: rotate(90deg); }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}