html,
body {
  margin: 0;
  min-height: 100%;
  overflow-x: hidden;
  overflow-y: auto;
}

* { box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
  color: #3F4A66;
  background:
    radial-gradient(circle at 10% 10%, rgba(122, 196, 245, 0.22), transparent 28%),
    radial-gradient(circle at 90% 0%, rgba(89, 126, 247, 0.18), transparent 32%),
    linear-gradient(180deg, #F6F8FF 0%, #ECF0FF 48%, #EAF7FF 100%);
  line-height: 1.75;
}

img { max-width: 100%; display: block; }
a { color: inherit; }

.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 9999;
  background: linear-gradient(135deg, #F7F9FF 0%, #ECF0FF 52%, #EAF7FF 100%);
  backdrop-filter: blur(12px);
  box-shadow: 0 8px 24px rgba(89, 126, 247, 0.10);
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  min-height: 72px;
  padding: 0 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand img,
.drawer-logo img,
.footer-brand img {
  width: 148px;
  height: auto;
  object-fit: contain;
}

.desktop-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  flex: 1;
}

.desktop-nav a {
  text-decoration: none;
  color: #1D2B5F;
  font-weight: 700;
  font-size: 14px;
  padding: 9px 10px;
  border-radius: 999px;
  transition: all .2s ease;
  white-space: nowrap;
}

.desktop-nav a:hover,
.desktop-nav a.active,
.drawer-nav a.active,
.drawer-nav a:hover {
  color: #597EF7;
  background: rgba(89, 126, 247, 0.10);
}

.main-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: 999px;
  background: linear-gradient(135deg, #7580EE 0%, #597EF7 48%, #7AC4F5 100%);
  color: #FFFFFF;
  font-weight: 700;
  text-decoration: none;
  box-shadow:
    0 0 10px rgba(89, 126, 247, 0.28),
    0 0 22px rgba(122, 196, 245, 0.20),
    0 10px 24px rgba(89, 126, 247, 0.20);
  transition: all 0.25s ease;
  border: none;
  white-space: nowrap;
}

.main-btn:hover {
  transform: translateY(-1px);
  box-shadow:
    0 0 14px rgba(89, 126, 247, 0.36),
    0 0 28px rgba(122, 196, 245, 0.26),
    0 14px 28px rgba(89, 126, 247, 0.24);
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(89, 126, 247, .16);
  border-radius: 14px;
  background: rgba(255, 255, 255, .84);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}
.menu-toggle span {
  width: 20px;
  height: 2px;
  background: #1D2B5F;
  border-radius: 999px;
}

.drawer-mask {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, .42);
  opacity: 0;
  visibility: hidden;
  transition: .25s ease;
  z-index: 10000;
}
.mobile-drawer {
  position: fixed;
  top: 0;
  left: 0;
  width: min(84vw, 340px);
  height: 100vh;
  background: linear-gradient(180deg, #F7F9FF 0%, #ECF0FF 100%);
  z-index: 10001;
  transform: translateX(-104%);
  transition: .28s ease;
  box-shadow: 20px 0 44px rgba(29, 43, 95, .16);
  padding: 18px;
  overflow-y: auto;
}
.drawer-open .drawer-mask { opacity: 1; visibility: visible; }
.drawer-open .mobile-drawer { transform: translateX(0); }
.drawer-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.drawer-close {
  border: none;
  background: rgba(89, 126, 247, .12);
  color: #1D2B5F;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  font-size: 26px;
  line-height: 1;
}
.drawer-nav { display: grid; gap: 8px; }
.drawer-nav a {
  text-decoration: none;
  color: #1D2B5F;
  font-weight: 700;
  padding: 12px 14px;
  border-radius: 14px;
  background: rgba(255,255,255,.68);
  border: 1px solid rgba(89,126,247,.12);
}
.drawer-note {
  margin-top: 18px;
  padding: 14px;
  border-radius: 16px;
  background: rgba(255,255,255,.72);
  color: #5B647A;
  font-size: 14px;
}

.banner-slider {
  max-width: 1200px;
  margin: 28px auto 36px;
  border-radius: 20px;
  background: #101827;
  box-shadow: 0 22px 48px rgba(16, 24, 39, 0.20);
  overflow: hidden;
  position: relative;
}
.banner-track { position: relative; height: 410px; }
.banner-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity .5s ease;
}
.banner-slide.active { opacity: 1; z-index: 1; }
.banner-slide img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #101827;
}
.banner-slide::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(16, 24, 39, .78), rgba(16, 24, 39, .30), rgba(16, 24, 39, .08));
}
.banner-caption {
  position: absolute;
  z-index: 2;
  left: 52px;
  top: 50%;
  transform: translateY(-50%);
  max-width: 520px;
  color: #fff;
}
.banner-caption span,
.section-title span,
.stagger-copy span,
.app-copy span,
.page-hero span,
.feature-card span,
.rich-card span {
  display: inline-block;
  color: #597EF7;
  font-weight: 800;
  letter-spacing: .04em;
  margin-bottom: 8px;
}
.banner-caption span { color: #BFD8FF; }
.banner-caption h1,
.banner-caption h2 {
  margin: 0 0 14px;
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1.18;
}
.banner-caption p { color: rgba(255,255,255,.88); margin-bottom: 22px; }
.text-link {
  display: inline-flex;
  color: #597EF7;
  text-decoration: none;
  font-weight: 800;
  align-items: center;
  gap: 8px;
}
.text-link::after { content: "→"; transition: .2s ease; }
.text-link:hover::after { transform: translateX(3px); }
.text-link.light { color: #DCE8FF; }
.slider-arrow {
  position: absolute;
  z-index: 3;
  top: 50%;
  transform: translateY(-50%);
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,.5);
  color: #fff;
  background: rgba(255,255,255,.18);
  font-size: 34px;
  line-height: 1;
  cursor: pointer;
}
.slider-prev { left: 18px; }
.slider-next { right: 18px; }
.slider-dots {
  position: absolute;
  z-index: 3;
  left: 0;
  right: 0;
  bottom: 16px;
  display: flex;
  justify-content: center;
  gap: 8px;
}
.slider-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  border: none;
  background: rgba(255,255,255,.54);
  transition: .2s ease;
}
.slider-dot.active {
  width: 28px;
  background: linear-gradient(135deg, #7580EE, #7AC4F5);
}

.section-narrow,
.section-block {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 22px;
}
.section-block { padding-top: 58px; padding-bottom: 24px; }
.quick-nav {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 28px;
}
.quick-nav a,
.info-card,
.rich-card,
.notice-card,
.feature-card,
.safe-cards article,
.faq-grid article,
.faq-item,
.timeline-list article {
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(89, 126, 247, 0.16);
  border-radius: 22px;
  box-shadow: 0 18px 40px rgba(89, 126, 247, 0.08);
}
.quick-nav a {
  text-decoration: none;
  padding: 17px;
  display: grid;
  gap: 3px;
  min-height: 120px;
  transition: .22s ease;
}
.quick-nav a:hover { transform: translateY(-3px); box-shadow: 0 20px 42px rgba(89,126,247,.14); }
.quick-nav b { color: #597EF7; font-size: 15px; }
.quick-nav strong { color: #1D2B5F; font-size: 18px; }
.quick-nav span { color: #5B647A; font-size: 14px; }

.intro-strip,
.responsible-strip {
  background: linear-gradient(135deg, rgba(255,255,255,.92), rgba(234,247,255,.88));
  border: 1px solid rgba(89,126,247,.16);
  border-radius: 24px;
  box-shadow: 0 18px 44px rgba(89,126,247,.10);
  padding: 28px 34px;
  color: #3F4A66;
}
.responsible-strip { margin-top: 36px; margin-bottom: 54px; }
.responsible-strip h2 { margin-top: 0; color: #1D2B5F; }
.section-title { text-align: center; max-width: 680px; margin: 0 auto 28px; }
.section-title h2,
.page-hero h1,
.stagger-copy h2,
.app-copy h2,
.rich-card h2,
.notice-card h2,
.split-card h2,
.info-card h2,
.faq-item h2,
.timeline-list h2 {
  color: #1D2B5F;
  line-height: 1.25;
}
.section-title h2 { font-size: clamp(28px, 4vw, 38px); margin: 0 0 10px; }
.section-title p { margin: 0; color: #5B647A; }
.info-grid { display: grid; gap: 18px; }
.info-grid.four { grid-template-columns: repeat(4, 1fr); }
.info-grid.three { grid-template-columns: repeat(3, 1fr); }
.info-grid.two { grid-template-columns: repeat(2, 1fr); }
.info-card { padding: 24px; }
.info-card b { color: #597EF7; font-size: 22px; }
.info-card h3 { color: #1D2B5F; margin: 8px 0 8px; }
ul { padding-left: 19px; margin: 12px 0 0; }
li { margin: 5px 0; }

.stagger-list { display: grid; gap: 26px; }
.stagger-item,
.app-showcase,
.safe-layout,
.split-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
  align-items: center;
  background: rgba(255,255,255,.70);
  border: 1px solid rgba(89,126,247,.16);
  border-radius: 28px;
  padding: 24px;
  box-shadow: 0 18px 44px rgba(89,126,247,.10);
}
.stagger-item.reverse .stagger-media { order: 2; }
.stagger-media img,
.app-media img,
.safe-image img,
.split-card img,
.feature-card img {
  width: 100%;
  object-fit: contain;
  background: #F6F8FF;
  border-radius: 22px;
  border: 1px solid rgba(89,126,247,.12);
}
.stagger-media img,
.app-media img,
.safe-image img,
.split-card img { max-height: 340px; }
.stagger-copy,
.app-copy { padding: 12px; }
.stagger-copy h2,
.app-copy h2 { font-size: clamp(26px, 3vw, 34px); margin: 0 0 12px; }
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.feature-card { overflow: hidden; }
.feature-card img { height: 190px; border-radius: 22px 22px 0 0; border: none; border-bottom: 1px solid rgba(89,126,247,.12); }
.feature-card div { padding: 20px; }
.feature-card h3 { color: #1D2B5F; margin: 4px 0 8px; }
.feature-card p { margin: 0 0 12px; }
.feature-card a { color: #597EF7; font-weight: 800; text-decoration: none; }

.app-showcase { margin-top: 58px; margin-bottom: 20px; }
.check-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; margin: 18px 0; }
.check-grid span {
  padding: 12px 14px;
  border-radius: 16px;
  background: rgba(89,126,247,.08);
  color: #1D2B5F;
  font-weight: 700;
}
.safe-layout { grid-template-columns: .8fr 1.2fr; }
.safe-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.safe-cards article { padding: 18px; box-shadow: none; }
.safe-cards h3 { margin: 0 0 6px; color: #1D2B5F; }
.safe-cards p { margin: 0; }
.faq-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.faq-grid article { padding: 22px; }
.faq-grid h3 { color: #1D2B5F; margin-top: 0; }

.page-hero {
  max-width: 1200px;
  margin: 30px auto 0;
  padding: 0 22px;
}
.page-hero > div {
  min-height: 260px;
  padding: 56px;
  border-radius: 30px;
  background:
    linear-gradient(135deg, rgba(255,255,255,.92), rgba(236,240,255,.86)),
    radial-gradient(circle at 80% 10%, rgba(122,196,245,.3), transparent 30%);
  border: 1px solid rgba(89,126,247,.16);
  box-shadow: 0 22px 54px rgba(89,126,247,.12);
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.page-hero h1 { font-size: clamp(34px, 5vw, 52px); margin: 0 0 14px; }
.page-hero p { max-width: 760px; margin: 0; color: #3F4A66; font-size: 18px; }
.content-page { padding-top: 34px; padding-bottom: 58px; display: grid; gap: 24px; }
.rich-card,
.notice-card,
.faq-item,
.timeline-list article { padding: 28px; }
.rich-card.mini { padding: 24px; }
.rich-card h2,
.notice-card h2 { margin-top: 0; }
.split-card { margin-bottom: 4px; }
.article-stack { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.notice-card {
  background: linear-gradient(135deg, rgba(255,255,255,.94), rgba(234,247,255,.88));
}
.timeline-list { display: grid; gap: 16px; }
.timeline-list article { position: relative; padding-left: 78px; }
.timeline-list b {
  position: absolute;
  left: 24px;
  top: 30px;
  color: #fff;
  background: linear-gradient(135deg, #7580EE, #7AC4F5);
  border-radius: 16px;
  padding: 8px 10px;
}
.faq-page { gap: 16px; }

.site-footer {
  background: linear-gradient(135deg, #1F1F1F 0%, #2B2B2B 100%);
  color: #E8ECF5;
  margin-top: 20px;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 22px 28px;
  display: grid;
  grid-template-columns: 1.05fr 1.45fr;
  gap: 40px;
}
.footer-brand p { color: rgba(232,236,245,.82); }
.footer-safe { font-size: 14px; }
.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.footer-links h3 { margin: 0 0 12px; color: #fff; }
.footer-links a {
  display: block;
  text-decoration: none;
  color: rgba(232,236,245,.82);
  margin: 8px 0;
}
.footer-links a:hover { color: #7AC4F5; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.10);
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 22px 24px;
  color: rgba(232,236,245,.68);
  display: flex;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
  font-size: 14px;
}

@media (max-width: 1080px) {
  .desktop-nav { display: none; }
  .menu-toggle { display: inline-flex; }
  .header-inner { display: grid; grid-template-columns: 48px 1fr auto; }
  .brand { justify-self: center; }
  .quick-nav { grid-template-columns: repeat(2, 1fr); }
  .info-grid.four, .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .info-grid.three { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 760px) {
  .header-inner { min-height: 66px; padding: 0 14px; gap: 10px; }
  .brand img, .drawer-logo img, .footer-brand img { width: 118px; }
  .header-btn { padding: 10px 16px; font-size: 14px; }
  .banner-slider { margin: 18px 14px 26px; border-radius: 16px; }
  .banner-track { height: 220px; }
  .banner-caption { left: 20px; right: 20px; max-width: none; }
  .banner-caption h1, .banner-caption h2 { font-size: 23px; }
  .banner-caption p { display: none; }
  .slider-arrow { width: 34px; height: 34px; font-size: 26px; }
  .slider-prev { left: 10px; }
  .slider-next { right: 10px; }
  .quick-nav { display: flex; overflow-x: auto; padding: 0 14px 8px; scroll-snap-type: x mandatory; }
  .quick-nav a { min-width: 180px; scroll-snap-align: start; }
  .section-narrow, .section-block, .page-hero { padding-left: 14px; padding-right: 14px; }
  .intro-strip, .responsible-strip, .page-hero > div { padding: 24px; border-radius: 22px; }
  .info-grid.four, .info-grid.three, .info-grid.two, .feature-grid, .safe-cards, .faq-grid, .article-stack { grid-template-columns: 1fr; }
  .stagger-item, .stagger-item.reverse, .app-showcase, .safe-layout, .split-card, .footer-inner { grid-template-columns: 1fr; }
  .stagger-item.reverse .stagger-media { order: initial; }
  .stagger-item, .app-showcase, .safe-layout, .split-card { padding: 16px; border-radius: 22px; }
  .feature-card img { height: 170px; }
  .check-grid, .footer-links { grid-template-columns: 1fr; }
  .page-hero p { font-size: 16px; }
  .timeline-list article { padding-left: 24px; padding-top: 70px; }
  .timeline-list b { top: 24px; }
}