:root{
  --page:#EAF2FB;
  --surface:#FFFFFF;
  --soft:#F4F8FF;
  --media:#EDF5FF;
  --blue:#137CD8;
  --blue2:#2FA8F7;
  --blue3:#45C7FF;
  --text:#24364F;
  --muted:#5D718A;
  --footer:#102B46;
  --footerText:#EAF6FF;
  --line:rgba(47,168,247,.14);
  --shadow:0 12px 26px rgba(19,124,216,.12);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  min-width:0;
  overflow-x:hidden;
  background:var(--page);
  color:var(--text);
  font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  line-height:1.8;
}
img{max-width:100%}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
button,a{touch-action:manipulation}
button{font:inherit}
.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,.footer-logo{display:inline-flex;align-items:center;min-width:0}
.site-logo img{display:block;height:38px;width:auto;max-width:156px;object-fit:contain}
.drawer-logo img,.footer-logo img{display:block;height:36px;width:auto;max-width:156px;object-fit:contain}
.logo-text{font-size:23px;font-weight:800;color:var(--blue);white-space:nowrap}
.logo-text-light{color:#fff}
.nav-core{display:flex;align-items:center;justify-content:center;gap:2px;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;white-space:nowrap;
}
.main-btn:hover{color:#fff;text-decoration:none;filter:brightness(.98)}
.menu-toggle{display:none;border:0;background:transparent;color:#137CD8;font-weight:800;min-height:40px;padding:0 6px;cursor:pointer}
.channel-strip{background:#F4F8FF;border-bottom:1px solid var(--line)}
.channel-inner{
  max-width:1140px;margin:0 auto;padding:0 16px;display:flex;gap:6px;overflow-x:auto;
  scrollbar-width:thin;
}
.channel-inner a{flex:0 0 auto;color:#5D718A;padding:10px 9px;font-size:14px;font-weight:700;text-decoration:none;white-space:nowrap}
.channel-inner a.is-current,.channel-inner a:hover{color:#137CD8}

.site-main{min-height:55vh}
.shell{width:min(1140px,calc(100% - 32px));margin:0 auto}
.reading{width:min(800px,calc(100% - 32px));margin:0 auto}
.section{padding:42px 0}
.section-tight{padding:28px 0}
.surface{
  background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);
}
.pad{padding:26px}
.hero-title{padding:34px 0 14px}
.hero-title h1,.article-head h1{margin:0;color:var(--blue);font-size:clamp(30px,4.2vw,42px);line-height:1.25}
.hero-title p,.article-head p{margin:12px 0 0;color:var(--muted);font-size:17px}
.breadcrumb{padding-top:24px;color:var(--muted);font-size:14px}
.breadcrumb a{color:var(--muted)}
.article{font-size:17px;line-height:1.86}
.article h2{color:var(--blue);font-size:24px;line-height:1.35;margin:30px 0 12px}
.article p{margin:0 0 16px}
.article ul,.article ol{padding-left:22px;margin:12px 0 20px}
.article li{margin:7px 0}
.article .lead{
  background:var(--soft);border:1px solid var(--line);border-radius:14px;padding:18px 20px;color:#29455f;
}
.notice-line{
  padding:18px 22px;background:#F4F8FF;border:1px solid var(--line);border-radius:14px;color:#38546d;
}
.related-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.related-links a{
  display:inline-flex;align-items:center;min-height:40px;padding:7px 13px;border-radius:999px;
  background:#fff;border:1px solid var(--line);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{display:flex;align-items:center;justify-content:center;color:#7b91a7;font-size:14px}
.media-placeholder span{padding:10px 14px}
.media.compact{min-height:190px}
.home-split{display:grid;grid-template-columns:1.02fr .98fr;gap:24px;align-items:center}
.home-split .text-side{padding:4px 0}
.home-split h2{margin:0 0 12px;color:var(--blue);font-size:28px}
.home-split p{margin:0 0 14px}
.index-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.index-item{background:#fff;border:1px solid var(--line);border-radius:15px;padding:20px;box-shadow:0 8px 20px rgba(19,124,216,.08)}
.index-item h2{margin:0 0 7px;font-size:20px}
.index-item h2 a{color:var(--blue)}
.index-item p{margin:0;color:var(--muted)}
.app-strip{
  display:grid;grid-template-columns:220px 1fr;gap:22px;align-items:center;padding:18px;
  background:#fff;border-radius:16px;border:1px solid var(--line);box-shadow:var(--shadow);
}
.app-strip .media{height:124px;aspect-ratio:auto}
.app-strip h2{margin:0 0 6px;color:var(--blue)}
.app-strip p{margin:0 0 10px}

.carousel{
  position:relative;z-index:1;width:min(1140px,calc(100% - 32px));height:280px;margin:24px auto 0;
  overflow:hidden;border-radius:16px;background:#fff;box-shadow:var(--shadow);border:1px solid var(--line);
}
.carousel-track,.carousel-slide{position:absolute;inset:0}
.carousel-slide{display:none;align-items:center;justify-content:center;background:#fff}
.carousel-slide.is-active{display:flex}
.carousel-slide .media{height:100%;aspect-ratio:auto;border-radius:0;background:#fff}
.carousel-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,.9);color:var(--blue);font-size:26px;
  line-height:1;cursor:pointer;box-shadow:0 4px 16px rgba(16,43,70,.14)
}
.carousel-prev{left:14px}.carousel-next{right:14px}
.carousel-dots{
  position:absolute;z-index:2;left:50%;bottom:12px;transform:translateX(-50%);
  display:flex;gap:7px;
}
.carousel-dot{
  width:11px;height:11px;min-height:11px;padding:0;border-radius:50%;border:1px solid rgba(19,124,216,.28);
  background:rgba(255,255,255,.88);cursor:pointer
}
.carousel-dot.is-active{background:#137CD8}

.topic-layout-a{display:grid;grid-template-columns:.82fr 1.18fr;gap:24px;align-items:start}
.topic-layout-b{display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:start}
.topic-layout-a .media,.topic-layout-b .media{min-height:210px}
.mini-list{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:20px 0}
.mini-link{
  min-height:76px;padding:14px;border-radius:14px;background:#fff;border:1px solid var(--line);
  display:flex;align-items:center;font-weight:700;justify-content:center;text-align:center;
}
.steps{counter-reset:step;display:grid;gap:12px;margin:18px 0}
.step{
  position:relative;padding:16px 16px 16px 52px;background:#fff;border:1px solid var(--line);border-radius:14px
}
.step:before{
  counter-increment:step;content:counter(step);position:absolute;left:14px;top:14px;width:26px;height:26px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;background:var(--blue);color:#fff;font-weight:800
}
.qa-list{display:grid;gap:16px}
.qa-item{background:#fff;border:1px solid var(--line);border-radius:15px;padding:20px}
.qa-item h2{margin:0 0 8px;color:var(--blue);font-size:21px}
.qa-item p{margin:0}

.floating-tools{
  position:fixed;right:10px;top:42%;z-index:8000;display:grid;gap:7px;width:104px;
}
.floating-tools a,.floating-tools button{
  min-height:40px;border:1px solid var(--line);background:#fff;color:var(--blue);border-radius:10px;
  padding:8px 9px;font-size:13px;font-weight:700;text-align:center;cursor:pointer;text-decoration:none;box-shadow:0 7px 18px rgba(16,43,70,.08)
}
.floating-tools .float-main{
  background:linear-gradient(135deg,#45C7FF 0%,#2FA8F7 48%,#137CD8 100%);color:#fff
}
.mobile-bottom{display:none}

.site-footer{background:#102B46;color:#EAF6FF;margin-top:42px}
.footer-grid{
  max-width:1140px;margin:0 auto;padding:42px 16px 28px;display:grid;grid-template-columns:1.35fr repeat(3,1fr);gap:26px
}
.footer-grid h2{font-size:16px;margin:0 0 10px;color:#fff}
.footer-grid a{display:block;color:#EAF6FF;margin:5px 0}
.footer-grid p{color:#bcd2e5;margin:12px 0 0}
.footer-note{max-width:1140px;margin:0 auto;padding:18px 16px 24px;border-top:1px solid rgba(234,246,255,.13);color:#bdd1e2;font-size:14px}
.footer-note p{margin:4px 0}

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

@media(max-width:1180px){
  .floating-tools{display:none}
}
@media(max-width:980px){
  .channel-strip{display:none}
  .nav-core{display:none}
  .menu-toggle{display:inline-flex;align-items:center;justify-content:flex-start}
  .header-inner{display:grid;grid-template-columns:1fr auto 1fr;gap:8px;min-height:62px;padding:0 12px}
  .site-logo{justify-self:center}
  .site-logo img{height:34px;max-width:142px}
  .header-action{justify-self:end;min-width:82px;padding:0 14px}
  .home-split,.topic-layout-a,.topic-layout-b{grid-template-columns:1fr}
  .index-grid{grid-template-columns:repeat(2,1fr)}
  .app-strip{grid-template-columns:170px 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .carousel{height:230px}
  .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;
  }
  .drawer-head{height:64px;padding:0 14px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}
  .drawer-close{border:0;background:#F4F8FF;color:var(--blue);font-weight:800;border-radius:10px;min-height:40px;padding:0 12px;cursor:pointer}
  .drawer-scroll{height:calc(100vh - 64px);overflow-y:auto;padding:14px 14px 28px}
  .drawer-group{padding:6px 0 12px}
  .drawer-group h2{font-size:14px;margin:0 0 6px;color:#5D718A}
  .drawer-links{display:grid;grid-template-columns:1fr 1fr;gap:6px}
  .drawer-links a{min-height:40px;display:flex;align-items:center;padding:7px 9px;border-radius:9px;background:#F4F8FF;color:#24364F}
  body.drawer-open{overflow:hidden}
}
@media(max-width:720px){
  body{padding-bottom:62px}
  .section{padding:30px 0}
  .section-tight{padding:22px 0}
  .shell,.reading{width:min(100% - 24px,1140px)}
  .reading{max-width:800px}
  .hero-title{padding:26px 0 10px}
  .hero-title h1,.article-head h1{font-size:clamp(26px,8.2vw,32px)}
  .article{font-size:16px;line-height:1.82}
  .article h2{font-size:21px;margin-top:24px}
  .index-grid{grid-template-columns:1fr 1fr;gap:10px}
  .index-item{padding:15px}
  .index-item h2{font-size:18px}
  .app-strip{grid-template-columns:1fr}
  .app-strip .media{height:auto;aspect-ratio:16/9}
  .footer-grid{grid-template-columns:1fr 1fr;gap:18px}
  .footer-brand{grid-column:1/-1}
  .carousel{height:160px;width:min(100% - 24px,1140px);margin-top:16px}
  .carousel-prev,.carousel-next{width:40px;height:40px;font-size:22px}
  .carousel-prev{left:8px}.carousel-next{right:8px}
  .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:6px 6px calc(6px + env(safe-area-inset-bottom))
  }
  .mobile-bottom a{min-height:44px;display:flex;align-items:center;justify-content:center;color:#24364F;font-weight:700}
}
@media(max-width:430px){
  .header-inner{grid-template-columns:68px minmax(0,1fr) 92px}
  .menu-toggle{font-size:14px}
  .site-logo img{height:30px;max-width:122px}
  .logo-text{font-size:20px}
  .header-action{height:40px;min-width:88px;padding:0 11px;font-size:14px}
  .index-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:375px){
  .header-inner{grid-template-columns:62px minmax(0,1fr) 84px;padding:0 8px}
  .site-logo img{max-width:112px}
  .header-action{min-width:82px;padding:0 9px;font-size:13px}
}