*{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}
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,.drawer-logo,.footer-logo{display:inline-flex;align-items:center;justify-content:center;min-width:126px;min-height:42px}
.site-logo img,.site-logo .image-placeholder{display:block;height:38px;width:156px;max-width:156px;object-fit:contain}
.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:#FFFFFF;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(.98)}
.menu-toggle{display:none;background:transparent;border:0;color:#137CD8;font-weight:800;min-height:40px;padding:0 6px}
.channel-bar{background:#F4F8FF;border-top:1px solid rgba(47,168,247,.10);border-bottom:1px solid rgba(47,168,247,.14);position:relative;z-index:20}
.channel-inner{max-width:1140px;margin:0 auto;padding:0 16px;display:flex;align-items:center;overflow-x:auto;scrollbar-width:thin}
.channel-inner a{flex:0 0 auto;color:#5D718A;padding:10px 9px;font-size:14px;white-space:nowrap;text-decoration:none}.channel-inner a:hover,.channel-inner a.is-current{color:#137CD8;font-weight:700}
.site-main{width:100%;min-height:56vh;padding-bottom:52px}
.container{max-width:1140px;margin:0 auto;padding:0 16px}.reading{max-width:820px;margin:0 auto}.reading-narrow{max-width:760px;margin:0 auto}
.section{padding:44px 0}.section-tight{padding:28px 0}.section-title{margin:0 0 14px;color:#137CD8;font-size:28px;line-height:1.3}.lead{font-size:18px;color:#405a76}
.breadcrumb{font-size:14px;color:#5D718A;padding:22px 0 0}.breadcrumb a{color:#5D718A}.breadcrumb span{margin:0 7px;color:#91a3b5}
.page-hero{padding:30px 0 10px}.page-hero h1{margin:0 0 14px;font-size:38px;line-height:1.25;color:#137CD8}.page-hero p{margin:0;max-width:800px;font-size:18px;color:#5D718A}
.article-shell{background:#fff;border:1px solid rgba(47,168,247,.14);border-radius:16px;box-shadow:0 12px 26px rgba(19,124,216,.12);padding:28px;margin-top:20px}.article-shell h2{color:#137CD8;font-size:24px;line-height:1.35;margin:30px 0 10px}.article-shell h2:first-child{margin-top:0}.article-shell p{font-size:17px;margin:0 0 16px}.article-shell ul,.article-shell ol{padding-left:1.2em;font-size:17px}.article-shell li{margin:7px 0}
.related-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}.related-links a{display:inline-flex;align-items:center;min-height:40px;padding:6px 13px;background:#F4F8FF;border:1px solid rgba(47,168,247,.14);border-radius:999px;font-weight:700}
.notice-band{max-width:1140px;margin:0 auto;background:#F4F8FF;border:1px solid rgba(47,168,247,.14);border-radius:16px;padding:22px 24px;color:#405a76}
.grid-6{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.index-link{background:#fff;border:1px solid rgba(47,168,247,.14);border-radius:16px;padding:20px;box-shadow:0 12px 26px rgba(19,124,216,.08)}.index-link h2{font-size:20px;margin:0 0 5px;color:#137CD8}.index-link p{margin:0;color:#5D718A}.index-link a{color:inherit;display:block;text-decoration:none}.index-link:hover{transform:translateY(-2px)}
.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:24px;align-items:center}.split-copy h2{font-size:28px;color:#137CD8;margin:0 0 12px}.split-copy p{font-size:17px;margin:0 0 14px}
.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}.image-placeholder{display:block;width:100%;height:100%;background:linear-gradient(135deg,#EDF5FF,#dcecff)}.logo-img.image-placeholder{border-radius:10px}
.app-strip{display:grid;grid-template-columns:180px 1fr auto;gap:18px;align-items:center;background:#fff;border-radius:16px;padding:16px;border:1px solid rgba(47,168,247,.14);box-shadow:0 12px 26px rgba(19,124,216,.10)}.app-strip .media{height:92px;aspect-ratio:auto}.app-strip h2{margin:0 0 4px;color:#137CD8;font-size:22px}.app-strip p{margin:0;color:#5D718A}
.carousel{position:relative;z-index:1;max-width:1140px;margin:30px auto 0;padding:0 16px}.carousel-frame{position:relative;height:290px;border-radius:16px;background:#fff;overflow:hidden;border:1px solid rgba(47,168,247,.14);box-shadow:0 12px 26px rgba(19,124,216,.10)}.carousel-slide{position:absolute;inset:0;opacity:0;pointer-events:none;transition:opacity .35s ease;background:#fff}.carousel-slide.is-active{opacity:1;pointer-events:auto}.carousel-slide img,.carousel-slide .image-placeholder{width:100%;height:100%;object-fit:contain;display:block}.carousel-prev,.carousel-next{position:absolute;top:50%;transform:translateY(-50%);width:42px;height:42px;min-height:40px;border:0;border-radius:50%;background:rgba(19,124,216,.88);color:#fff;font-size:24px;z-index:2;cursor:pointer}.carousel-prev{left:28px}.carousel-next{right:28px}.carousel-dots{position:absolute;left:50%;bottom:12px;transform:translateX(-50%);display:flex;gap:8px;z-index:2}.carousel-dot{position:relative;width:28px;height:40px;min-height:40px;padding:0;border:0;background:transparent;cursor:pointer}.carousel-dot:after{content:"";position:absolute;left:50%;top:50%;width:10px;height:10px;border-radius:50%;background:rgba(19,124,216,.28);transform:translate(-50%,-50%)}.carousel-dot.is-active:after{background:#137CD8}
.mini-directory{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.mini-directory a{background:#F4F8FF;border:1px solid rgba(47,168,247,.14);border-radius:14px;padding:15px;font-weight:700}
.compare{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.compare>div{background:#F4F8FF;border-radius:14px;padding:18px;border:1px solid rgba(47,168,247,.14)}.compare h3{color:#137CD8;margin:0 0 6px}.compare p{margin:0;font-size:16px}
.steps{counter-reset:step;list-style:none;padding:0!important}.steps li{position:relative;padding:15px 15px 15px 54px;background:#F4F8FF;border:1px solid rgba(47,168,247,.14);border-radius:14px;margin:10px 0}.steps li:before{counter-increment:step;content:counter(step);position:absolute;left:16px;top:14px;width:26px;height:26px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:#137CD8;color:#fff;font-weight:700}
.faq-list details{background:#F4F8FF;border:1px solid rgba(47,168,247,.14);border-radius:14px;padding:14px 16px;margin:12px 0}.faq-list summary{cursor:pointer;color:#137CD8;font-size:18px;font-weight:700}.faq-list p{margin:10px 0 0}
.site-footer{background:#102B46;color:#EAF6FF;padding:42px 16px 92px}.footer-inner{max-width:1140px;margin:0 auto;display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:30px}.footer-inner h2{font-size:18px;margin:0 0 10px;color:#fff}.footer-inner a{display:block;color:#EAF6FF;margin:6px 0}.footer-inner p{color:#cfdeeb;margin:10px 0 0}.footer-logo img,.footer-logo .image-placeholder,.drawer-logo img,.drawer-logo .image-placeholder{width:156px;height:38px;object-fit:contain}.footer-bottom{max-width:1140px;margin:28px auto 0;padding-top:20px;border-top:1px solid rgba(234,246,255,.16);font-size:14px;color:#c7d9e7}
.float-tools{position:fixed;right:10px;top:50%;transform:translateY(-50%);z-index:8000;display:flex;flex-direction:column;gap:7px;width:112px}.float-tools a,.float-tools button{display:flex;align-items:center;justify-content:center;min-height:40px;padding:7px 8px;border:1px solid rgba(47,168,247,.18);background:#fff;color:#137CD8;border-radius:10px;font:inherit;font-size:13px;font-weight:700;box-shadow:0 8px 20px rgba(19,124,216,.10);cursor:pointer;text-decoration:none}.float-tools .float-register{background:linear-gradient(135deg,#45C7FF 0%,#2FA8F7 48%,#137CD8 100%);color:#fff}
.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{min-height:40px;border:0;background:#F4F8FF;color:#137CD8;border-radius:999px;padding:0 13px;font-weight:700}.drawer-groups{height:calc(100vh - 70px);overflow:auto;padding:10px 16px 28px}.drawer-groups section{padding:10px 0;border-bottom:1px solid rgba(47,168,247,.12)}.drawer-groups h2{font-size:14px;color:#5D718A;margin:0 0 5px}.drawer-groups a{display:block;padding:8px 0;color:#24364F;font-weight:700}
body.drawer-open{overflow:hidden}
@media(max-width:1180px){.float-tools{display:none}}
@media(max-width:980px){
 .nav-core,.channel-bar{display:none}.menu-toggle{display:inline-flex;align-items:center;justify-content:center}.header-inner{display:grid;grid-template-columns:72px minmax(120px,1fr) 96px;gap:8px;min-height:64px}.site-logo{justify-self:center;min-width:0}.site-logo img,.site-logo .image-placeholder{width:138px;height:36px}.header-action{min-width:88px;padding:0 12px;justify-self:end}
 .site-main{padding-bottom:86px}.page-hero h1{font-size:30px}.page-hero p,.lead{font-size:16px}.section{padding:34px 0}.grid-6{grid-template-columns:repeat(2,1fr)}.split{grid-template-columns:1fr}.app-strip{grid-template-columns:126px 1fr}.app-strip .main-btn{grid-column:1/-1;justify-self:start}.mini-directory,.compare{grid-template-columns:1fr 1fr}
 .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}
 .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:56px;display:flex;align-items:center;justify-content:center;color:#24364F;font-weight:700;text-decoration:none}
 .carousel-frame{height:230px}.carousel-prev{left:24px}.carousel-next{right:24px}.site-footer{padding-bottom:100px}.footer-inner{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
 .container{padding:0 14px}.header-inner{padding:0 10px;grid-template-columns:62px minmax(120px,1fr) 88px}.menu-toggle{padding:0;font-size:14px}.site-logo img,.site-logo .image-placeholder{width:126px;height:34px}.header-action{min-width:82px;height:40px;padding:0 10px;font-size:14px}.page-hero{padding-top:22px}.page-hero h1{font-size:28px}.article-shell{padding:21px 18px}.article-shell h2{font-size:22px}.article-shell p,.article-shell ul,.article-shell ol{font-size:16px}.grid-6{gap:10px}.index-link{padding:16px}.index-link h2{font-size:18px}.mini-directory,.compare{grid-template-columns:1fr}.app-strip{grid-template-columns:1fr}.app-strip .media{height:auto;aspect-ratio:16/9}.carousel{margin-top:22px;padding:0 14px}.carousel-frame{height:170px}.carousel-prev,.carousel-next{width:38px;height:40px;font-size:21px}.carousel-prev{left:20px}.carousel-next{right:20px}.footer-inner{grid-template-columns:1fr}.section-title{font-size:25px}
}