*{box-sizing:border-box}
html{scroll-behavior:smooth;overflow-x:hidden}
body{margin:0;background:#F6F8FF;color:#222;font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;overflow-x:hidden}
a{color:inherit}
img{max-width:100%}
button{font:inherit}
.site-header{position:sticky;top:0;z-index:9999;width:100%;background:linear-gradient(135deg,#F7F9FF 0%,#ECF0FF 52%,#EAF7FF 100%);box-shadow:0 8px 24px rgba(89,126,247,.10);backdrop-filter:blur(12px)}
.header-inner{max-width:1200px;min-height:72px;margin:0 auto;padding:0 20px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.site-logo{display:flex;align-items:center;flex:0 0 auto;text-decoration:none}
.site-logo img{display:block;height:40px;width:auto;max-width:168px;object-fit:contain}
.logo-placeholder{display:inline-flex;align-items:center;justify-content:center;min-width:132px;height:40px;padding:0 14px;border-radius:12px;background:#ECF0FF;color:#1D2B5F;font-weight:800}
.logo-placeholder-dark{background:#2a2a2a;color:#fff}
.nav-core{display:flex;align-items:center;gap:8px;white-space:nowrap;flex-wrap:nowrap}
.nav-core a{color:#1D2B5F;padding:8px 10px;border-radius:999px;font-weight:700;text-decoration:none;font-size:15px}
.nav-core a.is-current,.nav-core a:hover{background:rgba(255,255,255,.82);color:#597EF7}
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.login-link{font-weight:700;color:#1D2B5F;text-decoration:none;padding:8px}
.main-btn{position:relative;overflow:hidden;isolation:isolate;display:inline-flex;align-items:center;justify-content:center;height:42px;min-width:96px;padding:0 20px;background:linear-gradient(135deg,#7580EE 0%,#597EF7 48%,#7AC4F5 100%);color:#fff;border-radius:999px;text-decoration:none;font-weight:700;box-shadow:0 10px 24px rgba(89,126,247,.28)}
.main-btn:before{content:"";position:absolute;inset:-2px;border-radius:inherit;background:linear-gradient(120deg,transparent 0%,rgba(255,255,255,.85) 35%,transparent 70%);transform:translateX(-120%);animation:btnShine 2.4s infinite;z-index:-1}
.main-btn:after{content:"";position:absolute;inset:-1px;border-radius:inherit;border:1px solid rgba(255,255,255,.65);box-shadow:0 0 8px rgba(122,196,245,.55),0 0 18px rgba(89,126,247,.35);pointer-events:none}
@keyframes btnShine{0%{transform:translateX(-120%)}55%{transform:translateX(120%)}100%{transform:translateX(120%)}}
.menu-toggle,.mobile-register{display:none}
.channel-bar{background:#fff;border-bottom:1px solid rgba(89,126,247,.12)}
.channel-inner{max-width:1200px;margin:0 auto;padding:0 20px;display:flex;align-items:center;gap:4px;overflow-x:auto;scrollbar-width:thin}
.channel-inner a{flex:0 0 auto;padding:12px 9px;color:#5B647A;text-decoration:none;font-size:14px;font-weight:700}
.channel-inner a:hover{color:#597EF7}
.site-main{min-height:60vh}
.shell{width:min(1200px,calc(100% - 40px));margin:0 auto}
.reading{width:min(860px,calc(100% - 40px));margin:0 auto}
.page-hero{padding:68px 0 42px}
.home-intro{padding:50px 0 24px}
.page-hero .eyebrow,.home-intro .eyebrow{display:inline-flex;align-items:center;min-height:30px;padding:0 12px;border-radius:999px;background:#ECF0FF;color:#597EF7;font-size:14px;font-weight:800}
.page-hero h1,.home-intro h1{margin:18px 0 16px;color:#1D2B5F;font-size:clamp(38px,5vw,50px);line-height:1.15}
.page-hero p,.home-intro p{max-width:780px;margin:0;color:#5B647A;font-size:18px;line-height:1.85}
.section{padding:56px 0}
.section-tight{padding:38px 0}
.section-soft{background:linear-gradient(180deg,#ECF0FF 0%,#F6F8FF 100%)}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:24px}
.section-head h2,.reading h2,.content-card h2{margin:0;color:#1D2B5F;font-size:28px;line-height:1.3}
.section-head p{margin:0;max-width:580px;color:#5B647A;line-height:1.7}
.text-prose{font-size:17px;line-height:1.88}
.text-prose p{margin:0 0 18px}
.text-prose h2{margin:34px 0 14px;color:#1D2B5F;font-size:27px}
.text-prose h3{margin:26px 0 10px;color:#1D2B5F;font-size:21px}
.text-prose a{color:#597EF7;font-weight:700}
.media{position:relative;width:100%;max-width:100%;overflow:hidden;border-radius:16px;background:#ECF0FF;aspect-ratio:16/9}
.media>img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;object-position:center;display:block}
.media-placeholder{position:absolute;inset:0;background:linear-gradient(135deg,#ECF0FF,#EAF7FF)}
.card-media{height:174px;aspect-ratio:auto}
.feature-media{height:248px;aspect-ratio:auto}
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:32px;align-items:center}
.split.reverse .split-media{order:2}
.split-copy h2{margin:0 0 14px;color:#1D2B5F;font-size:30px}
.split-copy p{margin:0 0 14px;color:#5B647A;font-size:17px;line-height:1.85}
.link-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.text-link{display:inline-flex;align-items:center;min-height:38px;padding:0 14px;border:1px solid rgba(89,126,247,.16);border-radius:999px;background:#fff;color:#597EF7;text-decoration:none;font-weight:700}
.grid-2,.grid-3,.grid-4{display:grid;gap:20px}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.content-card{background:#fff;border:1px solid rgba(89,126,247,.16);border-radius:18px;padding:24px;box-shadow:0 16px 40px rgba(89,126,247,.10)}
.content-card h3{color:#1D2B5F;margin:0 0 12px;font-size:20px}
.content-card p{margin:0 0 10px;color:#5B647A;line-height:1.8}
.content-card a{color:#597EF7;font-weight:700;text-decoration:none}
.pill-strip{display:flex;gap:10px;overflow-x:auto;padding:4px 0 10px}
.pill-strip a{flex:0 0 auto;display:inline-flex;align-items:center;height:38px;padding:0 15px;border-radius:999px;background:#fff;border:1px solid rgba(89,126,247,.16);color:#1D2B5F;text-decoration:none;font-weight:700}
.notice-bar{display:flex;align-items:flex-start;gap:14px;padding:20px 22px;background:#fff;border:1px solid rgba(89,126,247,.16);border-radius:18px;box-shadow:0 16px 40px rgba(89,126,247,.10)}
.notice-bar strong{color:#1D2B5F;white-space:nowrap}
.notice-bar p{margin:0;color:#5B647A;line-height:1.8}
.topic-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.topic-card{display:flex;flex-direction:column;min-height:138px;padding:22px;border-radius:18px;background:#fff;border:1px solid rgba(89,126,247,.16);text-decoration:none;box-shadow:0 16px 40px rgba(89,126,247,.08)}
.topic-card strong{color:#1D2B5F;font-size:18px}
.topic-card span{margin-top:10px;color:#5B647A;line-height:1.65;font-size:14px}
.topic-card em{margin-top:auto;padding-top:14px;color:#597EF7;font-style:normal;font-weight:800}
.poster-carousel{position:relative;height:360px;border-radius:18px;background:#101827;overflow:hidden;box-shadow:0 20px 46px rgba(16,24,39,.20)}
.poster-slide{position:absolute;inset:0;opacity:0;visibility:hidden;transition:opacity .35s}
.poster-slide.is-active{opacity:1;visibility:visible}
.poster-slide .media{height:100%;aspect-ratio:auto;border-radius:0}
.poster-slide .media img{background:#101827}
.poster-prev,.poster-next{position:absolute;top:50%;transform:translateY(-50%);z-index:3;width:42px;height:42px;border:0;border-radius:50%;background:rgba(255,255,255,.92);color:#1D2B5F;font-size:24px;cursor:pointer}
.poster-prev{left:16px}
.poster-next{right:16px}
.poster-dots{position:absolute;left:0;right:0;bottom:14px;z-index:3;display:flex;justify-content:center;gap:8px}
.poster-dot{width:9px;height:9px;padding:0;border:0;border-radius:50%;background:rgba(255,255,255,.45)}
.poster-dot.is-active{width:24px;border-radius:999px;background:#fff}
.app-banner{display:grid;grid-template-columns:1.05fr .95fr;gap:28px;align-items:center;padding:30px;border-radius:18px;background:linear-gradient(135deg,#1D2B5F,#597EF7);color:#fff}
.app-banner h2{margin:0 0 12px;font-size:30px}
.app-banner p{margin:0;line-height:1.8;color:#eef3ff}
.app-banner .text-link{margin-top:18px;background:#fff}
.steps{counter-reset:step;display:grid;gap:14px}
.step{position:relative;padding:22px 22px 22px 70px;background:#fff;border:1px solid rgba(89,126,247,.16);border-radius:18px}
.step:before{counter-increment:step;content:counter(step);position:absolute;left:20px;top:20px;width:34px;height:34px;display:flex;align-items:center;justify-content:center;border-radius:50%;background:#597EF7;color:#fff;font-weight:800}
.step h3{margin:0 0 8px;color:#1D2B5F}
.step p{margin:0;color:#5B647A;line-height:1.8}
.qa-list{display:grid;gap:14px}
.qa-item{padding:22px;background:#fff;border:1px solid rgba(89,126,247,.16);border-radius:18px}
.qa-item h3{margin:0 0 10px;color:#1D2B5F;font-size:20px}
.qa-item p{margin:0;color:#5B647A;line-height:1.82}
.side-float{position:fixed;right:14px;top:50%;z-index:1000;transform:translateY(-50%);width:58px;display:flex;flex-direction:column;gap:8px}
.side-float a,.side-float button{min-height:48px;padding:8px 6px;border:1px solid rgba(89,126,247,.16);border-radius:14px;background:#fff;color:#597EF7;text-decoration:none;font-size:12px;text-align:center;font-weight:800;box-shadow:0 8px 20px rgba(89,126,247,.10)}
.side-float .float-main{background:linear-gradient(135deg,#7580EE,#597EF7 48%,#7AC4F5);color:#fff}
.site-footer{background:#1F1F1F;color:#D7DCE8;padding:54px 0 92px}
.footer-grid{width:min(1200px,calc(100% - 40px));margin:0 auto;display:grid;grid-template-columns:1.25fr 1fr 1fr 1fr;gap:28px}
.footer-grid section{display:flex;flex-direction:column;gap:9px}
.footer-grid h2{margin:0 0 7px;color:#fff;font-size:17px}
.footer-grid a{color:#D7DCE8;text-decoration:none}
.footer-brand p{margin:10px 0 0;max-width:320px;line-height:1.75}
.footer-logo img{display:block;height:38px;width:auto;max-width:164px;object-fit:contain}
.footer-bottom{width:min(1200px,calc(100% - 40px));margin:30px auto 0;padding-top:22px;border-top:1px solid #333;display:flex;justify-content:space-between;gap:24px;color:#aeb6c5;font-size:13px;line-height:1.7}
.footer-bottom p{margin:0}
.mobile-bottom,.mobile-drawer,.drawer-overlay{display:none}

@media(max-width:1100px){
.nav-core{gap:2px}
.nav-core a{padding:8px 7px;font-size:14px}
.header-inner{gap:10px}
.site-logo img{max-width:145px}
.topic-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
}

@media(max-width:899px){
.channel-bar,.nav-core,.header-actions,.side-float{display:none}
.header-inner{min-height:64px;padding:0 14px;display:grid;grid-template-columns:88px minmax(0,1fr) 104px;gap:8px}
.menu-toggle{display:flex;width:42px;height:42px;padding:9px;border:1px solid rgba(89,126,247,.16);border-radius:12px;background:#fff;flex-direction:column;justify-content:center;gap:4px}
.menu-toggle span{display:block;width:100%;height:2px;background:#1D2B5F}
.site-logo{justify-self:center;min-width:0}
.site-logo img{height:36px;max-width:138px}
.mobile-register{display:inline-flex;justify-self:end;height:40px;min-width:96px;padding:0 12px;font-size:14px}
.mobile-drawer{display:block;position:fixed;left:0;top:0;bottom:0;z-index:12000;width:min(84vw,320px);background:#fff;transform:translateX(-104%);transition:transform .2s;box-shadow:18px 0 44px rgba(16,24,39,.18)}
.mobile-drawer.is-open{transform:translateX(0)}
.drawer-overlay{display:none;position:fixed;inset:0;z-index:11000;background:rgba(16,24,39,.42);opacity:0;pointer-events:none;transition:opacity .18s}
.drawer-overlay.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 #eef1f8}
.drawer-logo img{display:block;height:34px;width:auto;max-width:150px;object-fit:contain}
.drawer-close{width:40px;height:40px;border:0;border-radius:12px;background:#ECF0FF;color:#1D2B5F;font-size:28px}
.drawer-scroll{height:calc(100% - 64px);overflow-y:auto;padding:14px}
.drawer-group{margin-bottom:18px}
.drawer-group h2{margin:0 0 7px;color:#5B647A;font-size:13px}
.drawer-group a{display:block;padding:10px;border-radius:10px;color:#1D2B5F;text-decoration:none;font-weight:700}
.drawer-lock{overflow:hidden}
.site-main{padding-bottom:70px}
.mobile-bottom{position:fixed;left:0;right:0;bottom:0;z-index:9000;display:grid;grid-template-columns:repeat(4,1fr);height:58px;background:#fff;border-top:1px solid rgba(89,126,247,.16)}
.mobile-bottom a{display:flex;align-items:center;justify-content:center;color:#1D2B5F;text-decoration:none;font-size:13px;font-weight:800}
.grid-3,.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
.topic-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
.split,.app-banner{grid-template-columns:1fr}
.split.reverse .split-media{order:0}
.poster-carousel{height:285px}
.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
.footer-bottom{flex-direction:column}
}

@media(max-width:620px){
.shell,.reading{width:min(100% - 28px,1200px)}
.page-hero{padding:48px 0 30px}
.page-hero h1,.home-intro h1{font-size:clamp(28px,9vw,34px)}
.page-hero p,.home-intro p{font-size:16px}
.section{padding:44px 0}
.section-tight{padding:30px 0}
.section-head{align-items:flex-start;flex-direction:column}
.section-head h2,.reading h2{font-size:24px}
.text-prose{font-size:16px}
.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.content-card{padding:20px}
.poster-carousel{height:210px}
.feature-media{height:224px}
.card-media{height:164px}
.app-banner{padding:22px}
.footer-grid{grid-template-columns:1fr}
}

@media(max-width:420px){
.header-inner{grid-template-columns:54px minmax(0,1fr) 100px;padding:0 10px;gap:4px}
.site-logo img{max-width:126px;height:34px}
.mobile-register{min-width:94px;padding:0 10px}
}

@media(prefers-reduced-motion:reduce){
*{animation:none!important;transition:none!important}
}

@media(min-width:900px){
.site-main{padding-right:68px}
}