*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:#EAF2FB;color:#24364F;font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;overflow-x:hidden}
body.drawer-open{overflow:hidden}
a{color:#137CD8}
img{max-width:100%}
button,a{touch-action:manipulation}
button{font:inherit}
.site-header{position:sticky;top:0;z-index:9000;width:100%;background:#FFFFFF;border-bottom:1px solid rgba(47,168,247,.18)}
.header-inner{max-width:1160px;min-height:68px;margin:0 auto;padding:0 18px;display:flex;align-items:center;justify-content:space-between;gap:14px}
.site-logo,.drawer-logo,.footer-logo{display:inline-flex;align-items:center;text-decoration:none;min-width:140px}
.site-logo img{display:block;height:36px;width:auto;max-width:150px;object-fit:contain}
.logo-fallback{font-weight:900;font-size:22px;color:#137CD8;letter-spacing:.05em;white-space:nowrap}
.logo-placeholder{display:inline-flex;align-items:center;justify-content:center;min-height:36px;padding:4px 12px;border-radius:10px;background:#EDF5FF}
.nav-core{display:flex;align-items:center;justify-content:center;gap:2px;min-width:0;flex:1}
.nav-core a{color:#24364F;padding:8px 12px;font-weight:700;text-decoration:none;white-space:nowrap}
.nav-core a.is-current,.nav-core a:hover{color:#137CD8;background:#F4F8FF;border-radius:999px}
.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;white-space:nowrap}
.menu-toggle{display:none;border:0;background:transparent;color:#137CD8;font-weight:800;min-height:40px;padding:6px 8px}
.channel-bar{background:#FFFFFF;border-bottom:1px solid rgba(47,168,247,.14)}
.channel-inner{max-width:1160px;margin:0 auto;padding:0 18px;display:flex;align-items:center;gap:18px;overflow-x:auto;scrollbar-width:thin}
.channel-inner a{position:relative;flex:0 0 auto;padding:13px 0 11px;color:#5D718A;text-decoration:none;font-size:14px;white-space:nowrap}
.channel-inner a:hover,.channel-inner a.is-current{color:#137CD8}
.channel-inner a.is-current:after{content:"";position:absolute;left:0;right:0;bottom:5px;height:2px;background:#137CD8;border-radius:2px}
.site-main{min-height:60vh;padding-bottom:40px}
.container{width:min(1160px,calc(100% - 36px));margin:0 auto}
.reading{width:min(800px,calc(100% - 36px));margin:0 auto}
.breadcrumb{font-size:14px;color:#5D718A;padding:18px 0 8px}
.breadcrumb a{color:#5D718A;text-decoration:none}
.page-hero,.section,.article-section,.index-block{margin:24px auto;background:#FFFFFF;border:1px solid rgba(47,168,247,.14);border-radius:12px;box-shadow:0 10px 24px rgba(19,124,216,.10)}
.page-hero,.article-section{padding:28px}
.page-hero h1,.article-section h1{font-size:clamp(28px,4vw,38px);line-height:1.22;margin:0 0 14px;color:#137CD8}
h2{color:#137CD8;line-height:1.35}
p,li{font-size:17px;line-height:1.82}
p{margin:0 0 16px}
ul,ol{padding-left:1.25em}
.lead{font-size:18px;color:#3F5873}
.muted{color:#5D718A}
.split{display:grid;grid-template-columns:40% 60%;gap:24px;align-items:center}
.split.reverse{grid-template-columns:56% 44%}
.split.reverse .text{order:1}.split.reverse .media{order:2}
.index-block{padding:30px}
.index-block h1{font-size:clamp(30px,4.2vw,40px);margin:0 0 14px;color:#137CD8}
.hero-actions{margin-top:20px}
.media{position:relative;width:100%;max-width:100%;overflow:hidden;border-radius:12px;background:#EDF5FF;aspect-ratio:16/9;z-index:1}
.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;color:#5D718A;background:#EDF5FF;text-align:center;padding:16px}
.home-main-media{height:auto;aspect-ratio:16/9;max-height:300px}
.media-row{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-top:22px}
.media-row .media{height:135px;aspect-ratio:auto}
.directory-list{display:grid;gap:0;border-top:1px solid rgba(47,168,247,.14)}
.directory-item{display:grid;grid-template-columns:170px 1fr;gap:18px;padding:16px 0;border-bottom:1px solid rgba(47,168,247,.14)}
.directory-item a{font-weight:800;text-decoration:none}
.notice-strip{margin:22px auto;padding:16px 20px;background:#F4F8FF;border:1px solid rgba(47,168,247,.14);border-radius:12px;color:#3F5873;line-height:1.75}
.article-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(240px,36%);gap:24px;align-items:start}
.article-grid .media{margin-top:4px}
.info-list{display:grid;gap:12px;margin:18px 0}
.info-row{padding:14px 16px;border-left:3px solid #2FA8F7;background:#F7FBFF;border-radius:0 12px 12px 0}
.link-cluster{display:flex;flex-wrap:wrap;gap:10px 18px;margin-top:20px;padding-top:18px;border-top:1px solid rgba(47,168,247,.14)}
.link-cluster a{font-weight:700;text-decoration:none}
.steps{counter-reset:step;display:grid;gap:12px;padding:0;list-style:none}
.steps li{counter-increment:step;background:#F7FBFF;border:1px solid rgba(47,168,247,.14);border-radius:12px;padding:14px 16px}
.steps li:before{content:counter(step);display:inline-flex;width:28px;height:28px;align-items:center;justify-content:center;margin-right:10px;border-radius:50%;background:#EDF5FF;color:#137CD8;font-weight:800}
.topic-index{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.topic-index a{display:block;padding:15px 16px;background:#F7FBFF;border:1px solid rgba(47,168,247,.14);border-radius:12px;text-decoration:none;font-weight:800}
.faq-list{display:grid;gap:16px}
.faq-item{background:#FFFFFF;border:1px solid rgba(47,168,247,.14);border-radius:12px;padding:20px}
.faq-item h2{font-size:20px;margin:0 0 10px}
.policy-note{padding:16px 18px;background:#F4F8FF;border-radius:12px;border:1px solid rgba(47,168,247,.14)}
.side-float{position:fixed;right:12px;top:34%;z-index:8000;display:flex;flex-direction:column;gap:8px;width:106px}
.side-float a,.side-float button{min-height:40px;border:1px solid rgba(47,168,247,.2);background:#FFFFFF;color:#137CD8;border-radius:10px;padding:9px 10px;text-align:center;text-decoration:none;font-weight:700;box-shadow:0 6px 16px rgba(19,124,216,.08)}
.side-float .side-primary{color:#FFFFFF;background:linear-gradient(135deg,#45C7FF 0%,#2FA8F7 48%,#137CD8 100%)}
.site-footer{background:#102B46;color:#EAF6FF;margin-top:26px}
.footer-inner{max-width:1160px;margin:0 auto;padding:38px 18px;display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:30px}
.footer-logo img{height:34px;width:auto;object-fit:contain;display:block}
.footer-brand .logo-fallback{color:#EAF6FF}
.site-footer h3{font-size:17px;color:#FFFFFF;margin:0 0 12px}
.site-footer a{display:block;color:#EAF6FF;text-decoration:none;margin:8px 0}
.site-footer p{font-size:14px;line-height:1.75;color:#D5E9FA}
.footer-bottom{max-width:1160px;margin:0 auto;padding:18px;border-top:1px solid rgba(234,246,255,.16)}
.mobile-bottom{display:none}
.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-close{border:0;background:#F4F8FF;color:#137CD8;border-radius:10px;min-height:40px;padding:7px 12px;font-weight:800}
.drawer-nav{padding:10px 16px 28px;height:calc(100vh - 70px);overflow:auto}
.drawer-nav section{padding:10px 0;border-bottom:1px solid rgba(47,168,247,.12)}
.drawer-title{font-size:14px!important;line-height:1.4!important;color:#5D718A;margin:4px 0 6px!important;font-weight:800}
.drawer-nav a{display:block;color:#24364F;text-decoration:none;padding:9px 4px;min-height:40px}
@media(max-width:1280px){
  .side-float{right:6px;width:96px}
  .container{width:min(1040px,calc(100% - 140px))}
}
@media(max-width:980px){
  .header-inner{min-height:64px;padding:0 12px;gap:8px}
  .menu-toggle{display:inline-flex;align-items:center;justify-content:center;flex:0 0 54px}
  .site-logo{justify-content:center;min-width:0;flex:1}
  .site-logo img{height:32px;max-width:132px}
  .nav-core{display:none}
  .header-action{flex:0 0 auto;min-width:76px;padding:0 12px;height:40px}
  .channel-bar{display:none}
  .side-float{display:none}
  .container,.reading{width:min(100% - 28px,820px)}
  .site-main{padding-bottom:78px}
  .split,.split.reverse,.article-grid{grid-template-columns:1fr}
  .split.reverse .text{order:1}.split.reverse .media{order:2}
  .media-row{grid-template-columns:repeat(2,minmax(0,1fr))}
  .media-row .media{height:150px}
  .home-main-media{max-height:190px}
  .topic-index{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-inner{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1/-1}
  .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{display:flex;align-items:center;justify-content:center;min-height:52px;color:#137CD8;text-decoration:none;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;
  }
  .media{z-index:1}
}
@media(max-width:520px){
  .header-action{font-size:14px;min-width:72px;padding:0 10px}
  .logo-fallback{font-size:19px}
  .page-hero,.article-section,.index-block{padding:20px}
  .page-hero h1,.article-section h1{font-size:28px}
  .index-block h1{font-size:30px}
  p,li{font-size:16px;line-height:1.8}
  .directory-item{grid-template-columns:1fr;gap:6px}
  .media-row .media{height:128px}
  .topic-index{grid-template-columns:1fr}
}