* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  background: #E6EBF2;
  color: #243447;
  line-height: 1.75;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 9999;
  background: #F5F7FB;
  border-bottom: 1px solid rgba(40,156,255,0.14);
  box-shadow: 0 10px 28px rgba(56,92,138,0.10);
}
.header-inner {
  width: min(1200px, calc(100% - 36px));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
}
.logo, .footer-logo, .drawer-logo { flex: 0 0 auto; display: inline-flex; align-items: center; }
.logo img { max-height: 52px; width: auto; display: block; }
.nav-wrap {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  justify-content: center;
}
.nav {
  display: flex;
  align-items: center;
  gap: 20px;
  white-space: nowrap;
  flex-wrap: nowrap;
}
.nav a, .nav button { font: inherit; }
.nav-link {
  position: relative;
  color: #4E5F7A;
  border: 0;
  background: transparent;
  padding: 22px 0;
  cursor: pointer;
  font-weight: 600;
}
.nav-link:hover, .nav-link.active, .dropdown-menu a:hover, .dropdown-menu a.active, .more-menu a:hover, .more-menu a.active { color: #289CFF; }
.nav-link.active::after, .nav-link:hover::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 14px;
  height: 3px;
  border-radius: 6px;
  background: #289CFF;
  box-shadow: 0 5px 12px rgba(40,156,255,0.28);
}
.chev { color: #289CFF; margin-left: 3px; }
.header-action {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
}
.main-btn, .soft-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 10px 22px;
  border-radius: 999px;
  background: linear-gradient(180deg, #32D1F6 0%, #27B9F4 35%, #249BFF 100%);
  color: #FFFFFF;
  font-weight: 700;
  border: 0;
  box-shadow: 0 12px 24px rgba(36,155,255,0.25);
}
.text-link { color: #289CFF; font-weight: 700; }
.dropdown, .more-dropdown { position: relative; }
.dropdown-menu, .more-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 180px;
  background: #FFFFFF;
  border: 1px solid rgba(40,156,255,0.12);
  border-radius: 14px;
  box-shadow: 0 18px 38px rgba(56,92,138,0.16);
  z-index: 10000;
  padding: 8px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity .18s ease, transform .18s ease;
}
.more-menu { right: 0; left: auto; }
.dropdown:hover .dropdown-menu, .dropdown:focus-within .dropdown-menu, .more-dropdown:hover .more-menu, .more-dropdown:focus-within .more-menu, .more-dropdown.open .more-menu {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
.dropdown-menu a, .more-menu a {
  display: block;
  padding: 10px 14px;
  color: #4E5F7A;
  white-space: nowrap;
  border-radius: 10px;
  font-weight: 600;
}
.menu-toggle { display: none; }
.site-main { padding-top: 92px; }
.container { width: min(1200px, calc(100% - 36px)); margin: 0 auto; }
.section { padding: 46px 0; }
.section.compact { padding: 32px 0; }
h1, h2, h3, .section-title { color: #289CFF; line-height: 1.25; margin: 0 0 14px; }
h1 { font-size: clamp(32px, 5vw, 56px); letter-spacing: -0.03em; }
h2, .section-title { font-size: clamp(26px, 3vw, 38px); }
h3 { font-size: 22px; }
p { margin: 0 0 14px; color: #243447; }
.lead { font-size: 18px; color: #66788A; max-width: 820px; }
.muted { color: #8A9AAF; }
.eyebrow, .tag, .step-num, .stat-num {
  display: inline-flex;
  align-items: center;
  color: #289CFF;
  font-weight: 800;
  letter-spacing: .03em;
}
.hero-panel, .card, .zone-card, .info-card, .review-card, .faq-item, .notice-card {
  background: rgba(255,255,255,0.92);
  border: 1px solid rgba(40,156,255,0.16);
  box-shadow: 0 14px 36px rgba(56,92,138,0.10);
  border-radius: 22px;
}
.hero-panel { padding: clamp(26px, 4vw, 48px); }
.page-hero { padding: 54px 0 26px; }
.page-hero .hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 28px; align-items: center; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; margin-top: 22px; }
.hero-media, .content-media {
  border-radius: 24px;
  background: #FFFFFF;
  border: 1px solid rgba(40,156,255,0.14);
  box-shadow: 0 18px 40px rgba(56,92,138,0.12);
  padding: 12px;
  overflow: hidden;
}
.content-img, .hero-media img, .zone-card img, .app-section img, .banner-slider img {
  max-width: 100%;
  width: 100%;
  height: auto;
  object-fit: contain;
}
.hero-media img, .content-media img { border-radius: 18px; background: #FFFFFF; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 22px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 22px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 20px; }
.grid-5 { display: grid; grid-template-columns: repeat(5, minmax(0,1fr)); gap: 18px; }
.card, .zone-card, .info-card, .review-card, .faq-item, .notice-card { padding: 24px; }
.card h3, .zone-card h3, .info-card h3 { margin-bottom: 8px; }
.card p, .zone-card p, .info-card p, .review-card p, .faq-item p { color: #66788A; }
.card-list { margin: 14px 0 0; padding: 0; list-style: none; }
.card-list li { position: relative; padding-left: 20px; margin: 8px 0; color: #66788A; }
.card-list li::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: #289CFF; position: absolute; left: 0; top: .75em; }
.banner-slider {
  width: min(1200px, calc(100% - 36px));
  margin: 28px auto 36px;
  border-radius: 24px;
  background: #FFFFFF;
  box-shadow: 0 18px 40px rgba(56,92,138,0.12);
  overflow: hidden;
  position: relative;
  z-index: 1;
}
.slider-stage { position: relative; aspect-ratio: 16 / 6.4; min-height: 320px; background: #FFFFFF; }
.slide { position: absolute; inset: 0; opacity: 0; transition: opacity .45s ease; display: grid; place-items: center; background: #FFFFFF; }
.slide.active { opacity: 1; z-index: 2; }
.slide img { width: 100%; height: 100%; object-fit: contain; background: #FFFFFF; }
.slide-caption {
  position: absolute;
  left: clamp(18px, 5vw, 56px);
  bottom: clamp(22px, 5vw, 54px);
  width: min(520px, calc(100% - 36px));
  background: rgba(255,255,255,0.86);
  border: 1px solid rgba(40,156,255,0.18);
  border-radius: 20px;
  padding: 20px 24px;
  backdrop-filter: blur(8px);
}
.slide-caption h2 { margin-bottom: 8px; }
.slide-caption p { color: #4E5F7A; margin-bottom: 0; }
.slider-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 4;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid rgba(40,156,255,0.2);
  background: rgba(255,255,255,0.86);
  color: #289CFF;
  font-size: 26px;
  cursor: pointer;
  box-shadow: 0 12px 26px rgba(56,92,138,0.14);
}
.slider-arrow.prev { left: 18px; }
.slider-arrow.next { right: 18px; }
.slider-dots { position: absolute; left: 0; right: 0; bottom: 16px; z-index: 5; display: flex; justify-content: center; gap: 9px; }
.slider-dot { width: 10px; height: 10px; border-radius: 99px; border: 0; background: rgba(40,156,255,0.28); cursor: pointer; padding: 0; }
.slider-dot.active { width: 28px; background: #289CFF; }
.welcome-grid, .app-grid, .support-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: center; }
.quick-card { min-height: 190px; display: flex; flex-direction: column; justify-content: space-between; }
.product-image { margin-bottom: 16px; border-radius: 16px; background: #F5F7FB; border: 1px solid rgba(40,156,255,0.12); overflow: hidden; }
.product-image img { width: 100%; height: 190px; object-fit: contain; background: #FFFFFF; }
.steps { counter-reset: item; display: grid; gap: 16px; }
.step { display: grid; grid-template-columns: auto 1fr; gap: 16px; align-items: flex-start; }
.step-num { width: 42px; height: 42px; border-radius: 14px; justify-content: center; background: #EEF2F7; border: 1px solid rgba(40,156,255,0.18); }
.review-card { background: linear-gradient(180deg, rgba(255,255,255,0.95), rgba(245,247,251,0.94)); }
.review-name { color: #289CFF; font-weight: 800; margin-top: 10px; }
.faq-list { display: grid; gap: 16px; }
.faq-item h3 { color: #243447; font-size: 19px; }
.notice-band { background: #DDE4EE; border: 1px solid rgba(40,156,255,0.14); border-radius: 22px; padding: 24px; color: #4E5F7A; }
.notice-band strong { color: #289CFF; }
.stat-row { display: grid; grid-template-columns: repeat(4,1fr); gap: 18px; }
.stat { background: #EEF2F7; border-radius: 18px; padding: 18px; border: 1px solid rgba(40,156,255,0.14); }
.stat-num { font-size: 26px; display: block; }
.site-footer { background: #243447; color: #EAF3FF; margin-top: 46px; }
.footer-inner { width: min(1200px, calc(100% - 36px)); margin: 0 auto; padding: 46px 0; display: grid; grid-template-columns: 1.2fr 1.6fr; gap: 38px; }
.footer-logo img { max-height: 54px; width: auto; margin-bottom: 16px; }
.footer-brand p, .footer-note { color: #EAF3FF; opacity: .86; }
.footer-links { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; }
.footer-links h3 { color: #EAF3FF; font-size: 18px; margin-bottom: 12px; }
.footer-links a { display: block; color: #EAF3FF; opacity: .78; margin: 8px 0; }
.footer-links a:hover { opacity: 1; color: #FFFFFF; }
.footer-bottom { border-top: 1px solid rgba(234,243,255,0.12); padding: 16px 0; width: min(1200px, calc(100% - 36px)); margin: 0 auto; display: flex; justify-content: space-between; gap: 16px; color: rgba(234,243,255,0.78); font-size: 14px; }
.drawer-mask, .mobile-drawer { display: none; }
@media (max-width: 1180px) {
  .nav { gap: 16px; }
  .wide-only { display: none; }
}
@media (max-width: 900px) {
  .header-inner { min-height: 68px; width: min(100% - 24px, 1200px); display: grid; grid-template-columns: 48px 1fr auto; gap: 12px; }
  .nav-wrap { display: none; }
  .logo { justify-content: center; }
  .logo img { max-height: 46px; }
  .menu-toggle { display: inline-flex; flex-direction: column; justify-content: center; gap: 5px; width: 44px; height: 44px; border-radius: 14px; border: 1px solid rgba(40,156,255,0.18); background: #FFFFFF; padding: 0 10px; }
  .menu-toggle span { display: block; height: 2px; border-radius: 4px; background: #289CFF; }
  .main-btn { min-height: 40px; padding: 9px 16px; }
  .site-main { padding-top: 78px; }
  .drawer-mask { display: block; position: fixed; inset: 0; background: rgba(36,52,71,0.34); opacity: 0; pointer-events: none; transition: opacity .22s ease; z-index: 10001; }
  .mobile-drawer { display: block; position: fixed; top: 0; left: 0; bottom: 0; width: min(84vw, 320px); background: #FFFFFF; transform: translateX(-100%); transition: transform .24s ease; z-index: 10002; box-shadow: 18px 0 40px rgba(36,52,71,0.18); overflow-y: auto; }
  .drawer-open .drawer-mask { opacity: 1; pointer-events: auto; }
  .drawer-open .mobile-drawer { transform: translateX(0); }
  .drawer-head { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 18px; border-bottom: 1px solid rgba(40,156,255,0.12); background: #F5F7FB; }
  .drawer-logo img { max-height: 46px; width: auto; }
  .drawer-close { border: 0; background: #EEF2F7; color: #289CFF; width: 38px; height: 38px; border-radius: 12px; font-size: 26px; line-height: 1; }
  .drawer-links { padding: 14px; display: grid; gap: 4px; }
  .drawer-links a { padding: 12px 14px; border-radius: 12px; color: #4E5F7A; font-weight: 700; background: #F5F7FB; }
  .drawer-links a:hover { color: #289CFF; background: #EEF2F7; }
  .page-hero .hero-grid, .welcome-grid, .app-grid, .support-grid, .footer-inner { grid-template-columns: 1fr; }
  .grid-3, .grid-4, .grid-5, .grid-2 { grid-template-columns: 1fr; }
  .stat-row { grid-template-columns: repeat(2, 1fr); }
  .slider-stage { aspect-ratio: 16 / 10; min-height: 300px; }
  .slide-caption { position: absolute; left: 14px; right: 14px; bottom: 42px; width: auto; padding: 14px 16px; }
  .slide-caption h2 { font-size: 22px; }
  .slide-caption p { font-size: 14px; line-height: 1.6; }
  .slider-arrow { width: 36px; height: 36px; font-size: 22px; }
  .footer-links { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; }
}
@media (max-width: 520px) {
  .container, .banner-slider { width: min(100% - 24px, 1200px); }
  .section { padding: 34px 0; }
  .hero-panel, .card, .zone-card, .info-card, .review-card, .faq-item, .notice-card { padding: 20px; border-radius: 18px; }
  .slider-stage { min-height: 260px; }
  .slide img { height: 100%; }
  .stat-row { grid-template-columns: 1fr; }
  .product-image img { height: 170px; }
}