*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:#F4FBFF;color:#223044;
  font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  line-height:1.82;overflow-x:hidden;
}
body.drawer-open{overflow:hidden}
a{color:#0877C9;text-decoration:none}
a:hover{text-decoration:none}
img,svg,video{max-width:100%}
button,input,textarea,select{font:inherit}
main{min-height:60vh}
.site-header{
  position:sticky;top:0;z-index:9999;width:100%;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(12px);
  box-shadow:0 8px 24px rgba(8,119,201,.08);
}
.header-inner{
  max-width:1180px;min-height:72px;margin:0 auto;padding:0 18px;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
}
.site-logo,.drawer-logo,.footer-logo{display:inline-flex;align-items:center;min-width:138px}
.site-logo img,.site-logo .image-placeholder{
  display:block;height:40px;width:168px;max-width:168px;object-fit:contain;
}
.logo-image{object-fit:contain}
.nav-core{display:flex;align-items:center;justify-content:center;gap:4px;min-width:0}
.nav-core a{
  color:#1D2A3A;padding:9px 12px;font-weight:700;text-decoration:none;white-space:nowrap;
  border-bottom:2px solid transparent;
}
.nav-core a.is-current,.nav-core a:hover{color:#0877C9;border-bottom-color:#1CA8F6}
.main-btn{
  display:inline-flex;align-items:center;justify-content:center;
  height:42px;min-width:96px;padding:0 20px;
  background:linear-gradient(135deg,#38C7FF 0%,#1CA8F6 48%,#0877C9 100%);
  color:#FFFFFF;border-radius:999px;text-decoration:none;font-weight:700;
  box-shadow:0 12px 26px rgba(8,119,201,.18);white-space:nowrap;
}
.menu-toggle{display:none;border:0;background:transparent;padding:8px;cursor:pointer}
.menu-toggle span{display:block;width:22px;height:2px;background:#0877C9;margin:4px 0;border-radius:99px}
.channel-bar{background:#EAF7FF;border-bottom:1px solid rgba(28,168,246,.12)}
.channel-inner{
  max-width:1180px;margin:0 auto;padding:0 18px;
  display:flex;align-items:center;gap:6px;overflow-x:auto;overscroll-behavior-x:contain;
  scrollbar-width:thin;
}
.channel-inner a{
  flex:0 0 auto;padding:10px 10px;color:#5F7082;font-size:14px;font-weight:700;white-space:nowrap;
}
.channel-inner a:hover{color:#0877C9}

.mobile-drawer,
.drawer-mask{display:none}

.page-shell{max-width:1180px;margin:0 auto;padding:0 18px}
.read-shell{max-width:1180px;margin:0 auto;padding:44px 18px 70px}
.read-width{max-width:820px;margin-left:auto;margin-right:auto}
.kicker{margin:0 0 8px;color:#0877C9;font-size:14px;font-weight:800;letter-spacing:.08em}
h1,h2,h3{color:#0877C9;line-height:1.28;margin-top:0}
h1{font-size:clamp(30px,4vw,46px);margin-bottom:18px}
h2{font-size:clamp(22px,2.4vw,30px);margin-bottom:12px}
h3{font-size:19px;margin-bottom:8px}
p{margin:0 0 16px}
.muted{color:#5F7082}
.card{
  background:#FFFFFF;border:1px solid rgba(28,168,246,.12);
  border-radius:16px;box-shadow:0 16px 40px rgba(8,119,201,.08);
}
.media{
  position:relative;width:100%;max-width:100%;overflow:hidden;
  border-radius:14px;background:#EAF7FF;aspect-ratio:16/9;
}
.media > img{
  position:absolute;inset:0;width:100%;height:100%;
  object-fit:contain;object-position:center center;display:block;
}
.image-placeholder{
  display:block;width:100%;height:100%;min-height:120px;background:
  linear-gradient(135deg,#EAF7FF 0%,#F6FCFF 48%,#DDF2FF 100%);
}
.media-feature{min-height:220px}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-weight:800}
.link-arrow::after{content:"→"}

.home-hero{padding:30px 0 10px}
.hero-carousel{max-width:1180px;margin:0 auto;padding:0 18px}
.carousel-shell{
  position:relative;overflow:hidden;border-radius:18px;background:#FFFFFF;
  min-height:320px;border:1px solid rgba(28,168,246,.12);box-shadow:0 16px 40px rgba(8,119,201,.08)
}
.carousel-slide{display:none;width:100%;height:330px}
.carousel-slide.is-active{display:block}
.carousel-slide img,.carousel-slide .image-placeholder{width:100%;height:100%;object-fit:contain;background:#FFFFFF}
.carousel-prev,.carousel-next{
  position:absolute;top:50%;transform:translateY(-50%);width:42px;height:42px;border:0;border-radius:50%;
  background:rgba(255,255,255,.92);color:#0877C9;font-size:28px;line-height:1;cursor:pointer;
  box-shadow:0 8px 24px rgba(8,119,201,.14)
}
.carousel-prev{left:14px}.carousel-next{right:14px}
.carousel-dots{position:absolute;left:50%;bottom:14px;transform:translateX(-50%);display:flex;gap:8px}
.carousel-dot{width:9px;height:9px;border-radius:50%;border:0;background:#9ECFEA;padding:0;cursor:pointer}
.carousel-dot.is-active{background:#0877C9}

.home-intro-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:22px;margin:28px 0 0}
.home-intro{padding:28px}
.home-intro p{font-size:17px}
.quick-index{padding:22px;display:grid;grid-template-columns:1fr 1fr;gap:12px}
.quick-index a{
  display:flex;min-height:90px;flex-direction:column;justify-content:center;padding:16px;
  border-radius:14px;background:#EAF7FF;color:#1D2A3A;font-weight:800
}
.quick-index a span{display:block;color:#5F7082;font-size:13px;font-weight:500;margin-top:5px}
.section-space{padding:52px 0 0}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;margin-bottom:18px}
.section-head p{max-width:620px;color:#5F7082;margin:0}
.path-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.path-item{padding:20px;min-height:160px}
.path-no{font-size:13px;color:#38A8E7;font-weight:800;margin-bottom:12px}
.path-item h3{color:#1D2A3A}
.topic-strip{display:flex;gap:10px;overflow-x:auto;padding:3px 0 10px;overscroll-behavior-x:contain}
.topic-strip a{
  flex:0 0 auto;padding:9px 15px;border-radius:999px;background:#FFFFFF;
  border:1px solid rgba(28,168,246,.18);color:#0877C9;font-weight:800;white-space:nowrap
}
.editorial-grid{display:grid;grid-template-columns:1.3fr .7fr;gap:18px}
.editorial-main{padding:26px}
.editorial-side{display:grid;gap:14px}
.mini-card{padding:20px}
.service-band{
  margin:52px 0 0;padding:26px;border-radius:16px;background:#EAF7FF;
  display:grid;grid-template-columns:1.5fr repeat(4,auto);align-items:center;gap:14px
}
.service-band p{margin:0;color:#5F7082}
.service-band a{font-weight:800;white-space:nowrap}

.page-intro{
  display:grid;grid-template-columns:1.15fr .85fr;gap:28px;align-items:center;
  margin-bottom:34px
}
.page-intro.single{display:block}
.page-intro-copy{padding:30px}
.page-intro-copy p{font-size:17px;color:#4F6174}
.page-toc{
  padding:22px;background:#EAF7FF;border-radius:16px;border:1px solid rgba(28,168,246,.12)
}
.page-toc h2{font-size:20px}
.page-toc a{display:block;padding:7px 0;font-weight:800;color:#1D2A3A}
.page-toc a:hover{color:#0877C9}
.article-stack{display:grid;gap:18px}
.article-block{padding:26px}
.article-block p:last-child{margin-bottom:0}
.article-grid-2{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.article-grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.note-line{
  padding:22px 24px;border-left:4px solid #1CA8F6;background:#FFFFFF;border-radius:0 14px 14px 0;
  box-shadow:0 12px 32px rgba(8,119,201,.06)
}
.steps{counter-reset:step;display:grid;gap:14px}
.step{position:relative;padding:22px 22px 22px 72px}
.step::before{
  counter-increment:step;content:counter(step);position:absolute;left:20px;top:20px;
  width:34px;height:34px;border-radius:50%;display:grid;place-items:center;
  color:#fff;background:linear-gradient(135deg,#38C7FF,#0877C9);font-weight:800
}
.related-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.related-links a{padding:8px 13px;border-radius:999px;background:#EAF7FF;font-weight:800}
.faq-list{display:grid;gap:14px}
.faq-item{padding:24px}
.faq-item h2{font-size:20px;color:#1D2A3A}
.topic-visual{max-width:720px;margin:0 auto 28px}

.site-footer{background:#082A46;color:#EAF8FF;margin-top:70px}
.footer-grid{max-width:1180px;margin:0 auto;padding:46px 18px 28px;display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:32px}
.site-footer h2{color:#FFFFFF;font-size:17px}
.site-footer a{display:block;color:#D9F1FF;padding:4px 0}
.footer-brand p{color:#B9D6E7}
.footer-logo img,.footer-logo .image-placeholder{width:168px;height:40px;object-fit:contain;background:transparent}
.footer-bottom{
  max-width:1180px;margin:0 auto;padding:20px 18px 26px;border-top:1px solid rgba(234,248,255,.18);
  color:#B9D6E7;font-size:13px;text-align:center
}
.floating-tools{
  position:fixed;right:14px;top:45%;z-index:9000;display:grid;gap:8px;width:92px
}
.floating-tools a,.floating-tools button{
  border:1px solid rgba(28,168,246,.2);background:#fff;color:#0877C9;border-radius:10px;
  padding:9px 8px;text-align:center;font-size:13px;font-weight:800;box-shadow:0 10px 26px rgba(8,119,201,.09)
}
.floating-tools .float-main{background:linear-gradient(135deg,#38C7FF,#0877C9);color:#fff}
.floating-tools button{cursor:pointer}
.mobile-bottom{display:none}

@media(max-width:980px){
  body{padding-bottom:66px}
  .header-inner{min-height:64px;padding:0 12px;gap:8px}
  .nav-core{display:none}
  .menu-toggle{display:block;flex:0 0 40px}
  .header-action{height:40px;min-width:78px;padding:0 14px;font-size:14px}
  .site-logo{min-width:0;justify-content:center;flex:1}
  .site-logo img,.site-logo .image-placeholder{width:150px;height:36px}
  .channel-bar{display:none}
  .mobile-drawer{
    display:block;
    position:fixed;
    inset:0 auto 0 0;
    width:min(84vw,320px);
    background:#fff;
    z-index:12000;
    transform:translateX(-105%);
    transition:transform .2s ease;
    box-shadow:18px 0 40px rgba(8,119,201,.16);
  }
  .mobile-drawer.is-open{transform:translateX(0)}
  .drawer-mask{
    display:none;
    position:fixed;
    inset:0;
    background:rgba(8,42,70,.42);
    z-index:11000;
    opacity:0;
    pointer-events:none;
    transition:opacity .18s ease;
  }
  .drawer-mask.is-visible{
    display:block;
    opacity:1;
    pointer-events:auto;
  }
  .drawer-head{
    min-height:64px;padding:10px 14px;display:flex;align-items:center;justify-content:space-between;
    border-bottom:1px solid #EAF7FF
  }
  .drawer-logo img,.drawer-logo .image-placeholder{width:145px;height:34px}
  .drawer-close{border:0;background:#EAF7FF;color:#0877C9;width:38px;height:38px;border-radius:50%;font-size:24px;cursor:pointer}
  .drawer-scroll{height:calc(100vh - 64px);overflow-y:auto;padding:14px}
  .drawer-scroll section{padding:6px 0 16px;border-bottom:1px solid #EAF7FF}
  .drawer-scroll h2{font-size:14px;margin:6px 8px;color:#7A8A9A}
  .drawer-scroll a{display:block;padding:8px 10px;border-radius:9px;color:#1D2A3A;font-weight:700}
  .drawer-scroll a:hover{background:#EAF7FF;color:#0877C9}
  .floating-tools{display:none}
  .mobile-bottom{
    display:grid;grid-template-columns:repeat(4,1fr);position:fixed;left:0;right:0;bottom:0;z-index:9800;
    background:#fff;border-top:1px solid rgba(28,168,246,.18);box-shadow:0 -8px 24px rgba(8,119,201,.08)
  }
  .mobile-bottom a{padding:12px 4px;text-align:center;color:#1D2A3A;font-size:13px;font-weight:800}
  .carousel-shell{min-height:250px}
  .carousel-slide{height:260px}
  .home-intro-grid,.editorial-grid,.page-intro{grid-template-columns:1fr}
  .path-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .service-band{grid-template-columns:1fr 1fr}
  .service-band p{grid-column:1/-1}
  .article-grid-3{grid-template-columns:1fr 1fr}
}

@media(max-width:640px){
  .page-shell,.hero-carousel,.read-shell{padding-left:14px;padding-right:14px}
  .home-hero{padding-top:18px}
  .carousel-shell{min-height:170px;border-radius:14px}
  .carousel-slide{height:180px}
  .carousel-prev,.carousel-next{width:34px;height:34px;font-size:22px}
  .home-intro-grid{margin-top:18px;gap:14px}
  .home-intro{padding:22px}
  .quick-index{grid-template-columns:1fr 1fr;padding:14px}
  .quick-index a{min-height:84px;padding:13px}
  .section-space{padding-top:36px}
  .section-head{display:block}
  .section-head p{margin-top:8px}
  .path-grid,.article-grid-2,.article-grid-3{grid-template-columns:1fr}
  .editorial-main,.article-block,.page-intro-copy{padding:22px}
  .service-band{grid-template-columns:1fr;margin-top:36px}
  .footer-grid{grid-template-columns:1fr;padding-top:36px}
  .read-shell{padding-top:30px;padding-bottom:48px}
  .page-intro{gap:16px;margin-bottom:22px}
  .media-feature{min-height:180px}
}

@media(max-width:390px){
  .header-action{min-width:72px;padding:0 12px}
  .site-logo img,.site-logo .image-placeholder{width:132px;height:34px}
  .quick-index{grid-template-columns:1fr}
  h1{font-size:28px}
}