*{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:1.78;overflow-x:hidden}
body.drawer-open{overflow:hidden}
a{color:#137CD8}
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,.drawer-logo{display:flex;align-items:center;text-decoration:none;min-width:120px}
.site-logo img,.drawer-logo img{display:block;height:38px;width:auto;max-width:156px;object-fit:contain}
.logo-fallback{font-weight:800;color:#137CD8;font-size:22px;white-space:nowrap}
.nav-core{display:flex;align-items:center;justify-content:center;gap:3px;flex:1;min-width:0}
.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:#FFFFFF;border-radius:999px;text-decoration:none;font-weight:700;box-shadow:0 10px 22px rgba(19,124,216,.18);touch-action:manipulation}
.menu-btn{display:none;min-height:40px;border:0;background:transparent;color:#137CD8;font-weight:800;font-size:15px;padding:0 8px;cursor:pointer}
.channel-bar{background:#F4F8FF;border-top:1px solid rgba(47,168,247,.14);border-bottom:1px solid rgba(47,168,247,.14)}
.channel-inner{max-width:1140px;margin:0 auto;padding:0 16px;display:flex;align-items:center;gap:18px;overflow-x:auto;scrollbar-width:thin}
.channel-inner a{display:block;padding:9px 0;color:#5D718A;text-decoration:none;font-size:14px;white-space:nowrap}
.channel-inner a:hover,.channel-inner a.is-current{color:#137CD8}
.site-main{min-height:60vh;padding-right:56px}
.shell{width:min(1140px,calc(100% - 32px));margin:0 auto}
.reading{width:min(800px,calc(100% - 32px));margin:0 auto}
.hero-space{padding:38px 0 22px}
.page-head{padding:38px 0 18px}
.breadcrumb{font-size:14px;color:#5D718A;margin-bottom:12px}
.breadcrumb a{color:#5D718A;text-decoration:none}
h1{font-size:clamp(28px,3.5vw,40px);line-height:1.22;color:#137CD8;margin:0 0 16px}
h2{font-size:clamp(21px,2.4vw,28px);line-height:1.35;color:#137CD8;margin:0 0 14px}
h3{font-size:18px;color:#24364F;margin:0 0 9px}
p{margin:0 0 16px}
.lead{font-size:18px;color:#415873}
.soft-note{background:#F4F8FF;border:1px solid rgba(47,168,247,.14);border-radius:16px;padding:22px 24px;box-shadow:0 12px 26px rgba(19,124,216,.06)}
.article-panel{background:#FFFFFF;border:1px solid rgba(47,168,247,.14);border-radius:16px;padding:26px;margin:0 0 22px;box-shadow:0 12px 26px rgba(19,124,216,.08)}
.article-panel ul,.article-panel ol{padding-left:1.25em;margin:10px 0 0}
.article-panel li{margin:7px 0}
.related-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.related-links a{background:#F4F8FF;border:1px solid rgba(47,168,247,.14);padding:8px 13px;border-radius:999px;text-decoration:none;color:#137CD8;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:grid;place-items:center;color:#5D718A;font-size:14px;background:linear-gradient(135deg,#EDF5FF,#E7F4FF)}
.media.compact{height:210px;aspect-ratio:auto}
.media.card-media{height:160px;aspect-ratio:auto}
.split{display:grid;grid-template-columns:1.03fr .97fr;gap:24px;align-items:center}
.split.reverse{grid-template-columns:.92fr 1.08fr}
.section-space{padding:24px 0 44px}
.index-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:20px}
.index-item{display:block;background:#FFFFFF;border:1px solid rgba(47,168,247,.14);border-radius:15px;padding:18px;text-decoration:none;box-shadow:0 12px 26px rgba(19,124,216,.07)}
.index-item strong{display:block;color:#137CD8;font-size:18px;margin-bottom:6px}
.index-item span{color:#5D718A;font-size:14px}
.app-strip{display:grid;grid-template-columns:180px 1fr auto;gap:20px;align-items:center;background:#FFFFFF;border:1px solid rgba(47,168,247,.14);border-radius:16px;padding:18px 20px;box-shadow:0 12px 26px rgba(19,124,216,.08)}
.app-strip .media{height:110px;aspect-ratio:auto}
.carousel{position:relative;z-index:1;background:#FFFFFF;border-radius:16px;overflow:hidden;box-shadow:0 12px 26px rgba(19,124,216,.12);height:300px}
.slide{position:absolute;inset:0;opacity:0;transition:opacity .3s ease;pointer-events:none}
.slide.is-active{opacity:1;pointer-events:auto}
.slide .media{height:100%;border-radius:0;aspect-ratio:auto;background:#FFFFFF}
.slide .media>img{object-fit:contain}
.carousel-prev,.carousel-next{position:absolute;top:50%;transform:translateY(-50%);z-index:2;width:42px;height:42px;border:0;border-radius:50%;background:rgba(255,255,255,.92);color:#137CD8;font-size:22px;font-weight:800;cursor:pointer;box-shadow:0 6px 18px rgba(16,43,70,.14)}
.carousel-prev{left:14px}.carousel-next{right:14px}
.carousel-dots{position:absolute;left:50%;bottom:12px;z-index:2;transform:translateX(-50%);display:flex;gap:7px}
.carousel-dot{position:relative;width:40px;height:40px;border:0;background:transparent;padding:0;cursor:pointer}
.carousel-dot:before{content:"";position:absolute;left:50%;top:50%;width:10px;height:10px;border-radius:50%;background:#B7CCE0;transform:translate(-50%,-50%)}
.carousel-dot.is-active:before{background:#137CD8}
.steps{display:grid;gap:12px;counter-reset:steps}
.step{background:#FFFFFF;border-radius:15px;border:1px solid rgba(47,168,247,.14);padding:18px 18px 18px 60px;position:relative}
.step:before{counter-increment:steps;content:counter(steps);position:absolute;left:18px;top:18px;width:30px;height:30px;border-radius:50%;display:grid;place-items:center;background:#EAF6FF;color:#137CD8;font-weight:800}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.three-col{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.mini-list{display:grid;gap:12px}
.mini-list a{display:block;background:#FFFFFF;border:1px solid rgba(47,168,247,.14);border-radius:14px;padding:16px;text-decoration:none;color:#24364F}
.mini-list a strong{color:#137CD8}
.question-list details{background:#FFFFFF;border:1px solid rgba(47,168,247,.14);border-radius:14px;margin:0 0 12px;padding:0 18px}
.question-list summary{cursor:pointer;color:#137CD8;font-weight:800;padding:16px 0}
.question-list details p{padding-bottom:16px}
.mobile-drawer,.drawer-mask{display:none}
.side-tools{position:fixed;right:10px;top:36%;z-index:8000;width:96px;display:grid;gap:8px}
.side-tools a,.side-tools button{min-height:40px;border:1px solid rgba(47,168,247,.18);border-radius:12px;background:#FFFFFF;color:#137CD8;text-align:center;text-decoration:none;font-weight:700;padding:9px 6px;font-family:inherit;cursor:pointer}
.side-tools .side-main{background:linear-gradient(135deg,#45C7FF 0%,#2FA8F7 48%,#137CD8 100%);color:#FFFFFF}
.site-footer{background:#102B46;color:#EAF6FF;margin-top:44px}
.footer-grid{max-width:1140px;margin:0 auto;padding:42px 16px 28px;display:grid;grid-template-columns:1.25fr 1fr 1fr 1fr;gap:26px}
.site-footer h2{color:#FFFFFF;font-size:18px}
.site-footer a{display:block;color:#EAF6FF;text-decoration:none;margin:6px 0}
.footer-brand img{height:38px;width:auto;max-width:156px;object-fit:contain;background:#fff;border-radius:8px;padding:4px}
.footer-bottom{border-top:1px solid rgba(234,246,255,.16);max-width:1140px;margin:0 auto;padding:18px 16px 28px;color:#C9D9E8;font-size:14px}
.mobile-bottom{display:none}
@media(max-width:1180px){.side-tools{display:none}.site-main{padding-right:0}}
@media(max-width:980px){
  .header-inner{min-height:62px;display:grid;grid-template-columns:74px minmax(120px,1fr) 92px;gap:8px}
  .menu-btn{display:inline-flex;align-items:center;justify-content:flex-start}
  .site-logo{justify-content:center;min-width:0}
  .site-logo img{max-width:150px;height:36px}
  .nav-core,.channel-bar{display:none}
  .header-cta{min-width:88px;height:40px;padding:0 12px;justify-self:end}
  .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);overflow-y:auto}
  .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}
  .drawer-head{min-height:64px;padding:12px 14px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid rgba(47,168,247,.14)}
  .drawer-logo img{height:34px;max-width:144px}
  .drawer-close{min-height:40px;border:0;background:#F4F8FF;color:#137CD8;border-radius:10px;padding:0 12px;font-weight:800;cursor:pointer}
  .drawer-groups{padding:12px 14px 28px}
  .drawer-groups section{padding:8px 0 13px;border-bottom:1px solid rgba(47,168,247,.12)}
  .drawer-groups h2{font-size:15px;color:#5D718A;margin:0 0 7px}
  .drawer-groups a{display:block;color:#24364F;text-decoration:none;padding:9px 4px;font-weight:700}
  .split,.split.reverse{grid-template-columns:1fr}
  .three-col{grid-template-columns:1fr 1fr}
  .carousel{height:230px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .mobile-bottom{position:fixed;left:0;right:0;bottom:0;z-index:8500;display:grid;grid-template-columns:repeat(4,1fr);background:#FFFFFF;border-top:1px solid rgba(47,168,247,.2);padding-bottom:env(safe-area-inset-bottom)}
  .mobile-bottom a{min-height:52px;display:flex;align-items:center;justify-content:center;color:#137CD8;text-decoration:none;font-weight:800}
  body{padding-bottom:52px}
}
@media(max-width:640px){
  .shell{width:min(100% - 24px,1140px)}
  .reading{width:min(100% - 24px,800px)}
  .hero-space,.page-head{padding-top:28px}
  .carousel{height:170px}
  .carousel-prev,.carousel-next{width:38px;height:38px}
  .index-grid{grid-template-columns:1fr 1fr;gap:10px}
  .index-item{padding:14px}
  .app-strip{grid-template-columns:110px 1fr;gap:14px}
  .app-strip .media{height:82px}
  .app-strip .main-btn{grid-column:1 / -1}
  .two-col,.three-col{grid-template-columns:1fr}
  .article-panel,.soft-note{padding:20px}
  .footer-grid{grid-template-columns:1fr;padding-top:34px}
}
@media(max-width:390px){
  .header-inner{grid-template-columns:64px minmax(112px,1fr) 88px;padding:0 10px}
  .menu-btn{padding-left:2px}
  .site-logo img{max-width:132px}
  .header-cta{min-width:82px;padding:0 9px}
  .index-item strong{font-size:16px}
}