*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:#EAF2FB;color:#24364F;font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.8;overflow-x:hidden}
body.drawer-open{overflow:hidden}
a{color:#137CD8;text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}
button,a{touch-action:manipulation}
.site-header{position:sticky;top:0;z-index:9000;width:100%;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);box-shadow:0 6px 18px rgba(19,124,216,.08)}
.header-inner{max-width:1140px;min-height:66px;margin:0 auto;padding:0 16px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.site-logo{display:flex;align-items:center;min-width:130px}
.site-logo img{display:block;height:38px;width:auto;max-width:156px;object-fit:contain}
.logo-fallback{font-size:22px;font-weight:800;color:#137CD8;white-space:nowrap}
.nav-core{display:flex;align-items:center;gap:2px;white-space:nowrap}
.nav-core a{color:#24364F;padding:8px 11px;font-weight:700;text-decoration:none;white-space:nowrap}
.nav-core a.is-current,.nav-core a:hover{color:#137CD8;box-shadow:inset 0 -2px 0 #2FA8F7}
.main-btn{display:inline-flex;align-items:center;justify-content:center;height:40px;min-width:92px;padding:0 18px;background:linear-gradient(135deg,#45C7FF 0%,#2FA8F7 48%,#137CD8 100%);color:#fff;border-radius:999px;text-decoration:none;font-weight:700;box-shadow:0 10px 22px rgba(19,124,216,.18);touch-action:manipulation}
.main-btn:hover{color:#fff;text-decoration:none;filter:brightness(1.02)}
.menu-btn{display:none;border:0;background:transparent;color:#137CD8;font-size:16px;font-weight:800;min-height:40px;padding:0 8px}
.channel-bar{background:#F4F8FF;border-top:1px solid rgba(47,168,247,.08);border-bottom:1px solid rgba(47,168,247,.12)}
.channel-inner{max-width:1140px;margin:0 auto;padding:7px 16px;display:flex;gap:18px;overflow-x:auto;white-space:nowrap;scrollbar-width:thin}
.channel-inner a{color:#5D718A;font-size:14px;font-weight:700}
.channel-inner a:hover{color:#137CD8}
.site-main{max-width:1140px;margin:0 auto;padding:32px 72px 52px 16px;min-height:60vh}
.breadcrumb{font-size:14px;color:#5D718A;margin-bottom:12px}
.page-hero{background:#fff;border:1px solid rgba(47,168,247,.14);border-radius:16px;padding:30px 32px;box-shadow:0 12px 26px rgba(19,124,216,.08);margin-bottom:24px}
.page-hero h1{margin:0 0 12px;color:#137CD8;font-size:clamp(28px,4vw,40px);line-height:1.25}
.page-hero p{margin:0;max-width:820px}
.article{max-width:820px;margin:0 auto}
.article.wide{max-width:100%}
.section{margin:26px 0;background:#fff;border:1px solid rgba(47,168,247,.14);border-radius:16px;padding:26px;box-shadow:0 12px 26px rgba(19,124,216,.08)}
.section h2{margin:0 0 12px;color:#137CD8;font-size:24px;line-height:1.35}
.section h3{color:#24364F;font-size:18px;margin:18px 0 8px}
.section p{margin:10px 0}
.note{background:#F4F8FF;border-left:4px solid #2FA8F7;padding:18px 20px;border-radius:0 14px 14px 0;margin:22px 0}
.link-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.link-row a{display:inline-flex;min-height:40px;align-items:center;padding:7px 12px;border:1px solid rgba(47,168,247,.2);border-radius:999px;background:#F4F8FF;font-weight:700}
.media{position:relative;width:100%;max-width:100%;overflow:hidden;border-radius:14px;background:#EDF5FF;aspect-ratio:16/9}
.media>img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;object-position:center center;display:block}
.media-placeholder{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:#EDF5FF;color:#5D718A;font-weight:700}
.media.compact{max-height:230px}
.split{display:grid;grid-template-columns:1fr 1.08fr;gap:24px;align-items:center}
.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.topic-grid a{display:block;background:#fff;border:1px solid rgba(47,168,247,.14);border-radius:15px;padding:20px;box-shadow:0 10px 22px rgba(19,124,216,.08);color:#24364F}
.topic-grid a strong{display:block;color:#137CD8;font-size:19px;margin-bottom:6px}
.topic-grid a span{color:#5D718A;font-size:14px}
.short-band{background:#F4F8FF;border:1px solid rgba(47,168,247,.14);border-radius:16px;padding:22px 26px;margin:24px 0}
.app-strip{display:grid;grid-template-columns:180px 1fr auto;gap:20px;align-items:center;background:#fff;border-radius:16px;padding:18px;border:1px solid rgba(47,168,247,.14);box-shadow:0 12px 26px rgba(19,124,216,.08);margin:26px 0}
.app-strip .media{height:110px;aspect-ratio:auto}
.list-clean{margin:10px 0 0;padding-left:1.2em}
.steps{counter-reset:step;display:grid;gap:14px}
.step{position:relative;padding:16px 16px 16px 54px;background:#F4F8FF;border-radius:14px}
.step:before{counter-increment:step;content:counter(step);position:absolute;left:16px;top:16px;width:28px;height:28px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:#137CD8;color:#fff;font-weight:800}
.duo{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.mini-index{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.mini-index a{background:#F4F8FF;padding:14px;border-radius:12px;font-weight:700}
.slider{position:relative;background:#fff;border-radius:16px;overflow:hidden;border:1px solid rgba(47,168,247,.14);box-shadow:0 12px 26px rgba(19,124,216,.08);height:280px;z-index:1;margin-bottom:24px}
.slide{position:absolute;inset:0;display:none}
.slide.is-active{display:block}
.slide .media{height:100%;border-radius:0;aspect-ratio:auto}
.slider button{position:absolute;top:50%;transform:translateY(-50%);width:44px;height:44px;border:0;border-radius:50%;background:rgba(255,255,255,.9);color:#137CD8;font-size:24px;font-weight:800;z-index:2;cursor:pointer}
.slider-prev{left:14px}.slider-next{right:14px}
.slider-dots{position:absolute;left:0;right:0;bottom:12px;display:flex;justify-content:center;gap:8px;z-index:2}
.slider-dot{position:static!important;transform:none!important;width:10px!important;height:10px!important;min-height:10px!important;border-radius:50%!important;padding:0!important;background:rgba(19,124,216,.25)!important}
.slider-dot.is-active{background:#137CD8!important}
.float-tools{position:fixed;right:12px;top:36%;z-index:8000;width:116px;display:flex;flex-direction:column;gap:8px;background:#fff;padding:10px;border-radius:14px;box-shadow:0 12px 26px rgba(19,124,216,.12);border:1px solid rgba(47,168,247,.14)}
.float-tools a,.float-tools button{min-height:40px;display:flex;align-items:center;justify-content:center;border:0;border-radius:10px;background:#fff;color:#137CD8;font-weight:700;font-family:inherit;font-size:14px;cursor:pointer}
.float-tools .main-btn{color:#fff;background:linear-gradient(135deg,#45C7FF 0%,#2FA8F7 48%,#137CD8 100%);min-width:0}
.mobile-bottom{display:none}
.site-footer{background:#102B46;color:#EAF6FF;padding:42px 16px 18px}
.footer-grid{max-width:1140px;margin:0 auto;display:grid;grid-template-columns:1.25fr 1fr 1fr 1fr;gap:28px}
.footer-grid h2{font-size:16px;margin:0 0 10px;color:#fff}
.footer-grid a{display:block;color:#EAF6FF;margin:5px 0}
.footer-brand img{height:40px;width:auto;object-fit:contain;background:#fff;border-radius:8px;padding:4px}
.footer-brand p{color:#cbdff1}
.footer-bottom{max-width:1140px;margin:26px auto 0;padding-top:18px;border-top:1px solid rgba(234,246,255,.16);color:#cbdff1;font-size:13px}
.mobile-drawer,.drawer-mask{display:none}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border-bottom:1px solid rgba(47,168,247,.14)}
.drawer-logo img{height:36px;width:auto;object-fit:contain}
.drawer-close{border:0;background:#F4F8FF;color:#137CD8;border-radius:10px;min-height:40px;padding:0 14px;font-weight:800}
.drawer-groups{padding:10px 16px 30px;overflow:auto;height:calc(100% - 66px)}
.drawer-groups section{margin:12px 0 18px}
.drawer-groups h2{font-size:14px;color:#5D718A;margin:0 0 8px}
.drawer-groups a{display:block;padding:9px 6px;color:#24364F;font-weight:700;border-bottom:1px solid rgba(47,168,247,.08)}
.faq-item{background:#fff;border:1px solid rgba(47,168,247,.14);border-radius:14px;padding:18px;margin:14px 0}
.faq-item h2{font-size:19px;margin:0 0 8px;color:#137CD8}
@media(max-width:980px){
  .header-inner{min-height:60px;display:grid;grid-template-columns:78px 1fr 92px;padding:0 10px}
  .menu-btn{display:inline-flex;align-items:center;justify-content:flex-start}
  .site-logo{justify-content:center;min-width:0}
  .site-logo img{height:34px;max-width:145px}
  .nav-core,.channel-bar{display:none}
  .header-action{min-width:84px;padding:0 12px;height:40px;font-size:14px;justify-self:end}
  .site-main{padding:24px 14px 84px}
  .float-tools{display:none}
  .mobile-bottom{position:fixed;left:0;right:0;bottom:0;z-index:8500;display:grid;grid-template-columns:repeat(4,1fr);background:#fff;border-top:1px solid rgba(47,168,247,.2);padding-bottom:env(safe-area-inset-bottom)}
  .mobile-bottom a{min-height:54px;display:flex;align-items:center;justify-content:center;color:#24364F;font-weight:800}
  .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(16,43,70,.16)}
  .mobile-drawer.is-open{transform:translateX(0)}
  .drawer-mask{display:none;position:fixed;inset:0;background:rgba(16,43,70,.38);z-index:11000;opacity:0;pointer-events:none;transition:opacity .18s ease}
  .drawer-mask.is-visible{display:block;opacity:1;pointer-events:auto}
  .slider{height:220px}
  .topic-grid{grid-template-columns:repeat(2,1fr)}
  .split,.duo{grid-template-columns:1fr}
  .app-strip{grid-template-columns:130px 1fr}
  .app-strip .main-btn{grid-column:1/-1;justify-self:start}
  .footer-grid{grid-template-columns:1fr 1fr}
  .mini-index{grid-template-columns:1fr 1fr}
}
@media(max-width:560px){
  .page-hero{padding:22px 20px}
  .section{padding:20px}
  .slider{height:160px}
  .slider button{width:40px;height:40px}
  .topic-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
  .topic-grid a{padding:15px}
  .topic-grid a strong{font-size:17px}
  .app-strip{grid-template-columns:1fr}
  .app-strip .media{height:150px}
  .footer-grid{grid-template-columns:1fr}
  .mini-index{grid-template-columns:1fr}
}