*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:#F6F8FF;color:#222;font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;overflow-x:hidden}
body.drawer-open{overflow:hidden}
a{color: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:inline-flex;align-items:center;text-decoration:none;flex:0 0 auto}
.site-logo img{display:block;height:40px;width:auto;max-width:168px;object-fit:contain}
.logo-text{font-size:24px;font-weight:900;color:#1D2B5F;white-space:nowrap}
.nav-core{display:flex;align-items:center;gap:8px;white-space:nowrap;flex-wrap:nowrap;min-width:0}
.nav-core a{color:#1D2B5F;padding:8px 10px;border-radius:999px;font-weight:700;text-decoration:none}
.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}
.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);border:0}
.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-btn,.mobile-register{display:none}
.channel-strip{background:#fff;border-top:1px solid rgba(89,126,247,.10);border-bottom:1px solid rgba(89,126,247,.10)}
.channel-inner{max-width:1200px;margin:auto;padding:0 20px;display:flex;overflow-x:auto;white-space:nowrap;scrollbar-width:thin}
.channel-inner a{display:block;padding:12px 11px;text-decoration:none;color:#5B647A;font-weight:700;font-size:14px}
.channel-inner a:hover,.channel-inner a.is-current{color:#597EF7}
.site-main{min-height:60vh}
.container{width:min(1200px,calc(100% - 40px));margin:0 auto}
.narrow{width:min(860px,calc(100% - 40px));margin:0 auto}
.section{padding:64px 0}
.section.compact{padding:44px 0}
.section-title{margin:0 0 14px;color:#1D2B5F;font-size:34px;line-height:1.2}
.section-lead{margin:0 0 28px;color:#5B647A;font-size:17px;line-height:1.85}
.page-hero{padding:68px 0 42px}
.page-hero .eyebrow{color:#597EF7;font-weight:800;margin-bottom:10px}
.page-hero h1{font-size:44px;line-height:1.15;color:#1D2B5F;margin:0 0 18px}
.page-hero p{font-size:18px;line-height:1.85;color:#5B647A;max-width:800px;margin:0}
.hero-slider{position:relative;background:#101827;border-radius:18px;overflow:hidden;height:360px}
.hero-slide{display:none;height:100%;padding:24px}
.hero-slide.is-active{display:block}
.hero-slide .media{height:100%;aspect-ratio:auto;background:#101827}
.hero-slide .media img{object-fit:contain}
.hero-prev,.hero-next{position:absolute;top:50%;transform:translateY(-50%);width:42px;height:42px;border-radius:50%;border:1px solid rgba(255,255,255,.4);background:rgba(16,24,39,.65);color:#fff;font-size:24px;cursor:pointer}
.hero-prev{left:16px}
.hero-next{right:16px}
.hero-dots{position:absolute;bottom:14px;left:50%;transform:translateX(-50%);display:flex;gap:8px}
.hero-dot{width:10px;height:10px;border-radius:50%;border:0;background:rgba(255,255,255,.45);padding:0}
.hero-dot.is-active{background:#fff}
.pill-scroll{display:flex;gap:10px;overflow-x:auto;padding:4px 0 8px}
.pill-scroll a{white-space:nowrap;text-decoration:none;background:#fff;border:1px solid rgba(89,126,247,.16);padding:10px 16px;border-radius:999px;color:#1D2B5F;font-weight:700}
.notice-line{background:#fff;border:1px solid rgba(89,126,247,.16);border-radius:16px;padding:20px 24px;box-shadow:0 16px 40px rgba(89,126,247,.10);line-height:1.85}
.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))}
.card{background:#fff;border:1px solid rgba(89,126,247,.16);border-radius:18px;padding:22px;box-shadow:0 16px 40px rgba(89,126,247,.10);min-width:0}
.card h2,.card h3{color:#1D2B5F;margin:0 0 10px}
.card p{color:#5B647A;line-height:1.8;margin:0 0 12px}
.card a.text-link,.text-link{color:#597EF7;font-weight:800;text-decoration:none}
.topic-card{padding:0;overflow:hidden}
.topic-card .media{border-radius:16px 16px 0 0;height:172px;aspect-ratio:auto}
.topic-card .topic-body{padding:18px}
.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 center;display:block}
.media-placeholder{display:block;width:100%;height:100%;background:linear-gradient(135deg,#ECF0FF,#EAF7FF)}
.feature-row{display:grid;grid-template-columns:1.05fr .95fr;gap:34px;align-items:center}
.feature-row.reverse{grid-template-columns:.95fr 1.05fr}
.feature-row.reverse .feature-media{order:2}
.feature-media .media{height:250px;aspect-ratio:auto}
.copy h2{color:#1D2B5F;font-size:30px;margin:0 0 14px}
.copy p,.article p{font-size:17px;line-height:1.86;color:#333}
.article h2{font-size:28px;color:#1D2B5F;margin:36px 0 14px}
.article h3{font-size:21px;color:#1D2B5F;margin:28px 0 10px}
.article ul,.article ol{padding-left:24px}
.article li{margin:9px 0;line-height:1.8}
.link-list{display:grid;gap:10px}
.link-list a{background:#fff;border:1px solid rgba(89,126,247,.16);border-radius:14px;padding:14px 16px;text-decoration:none;color:#1D2B5F;font-weight:700}
.steps{counter-reset:s}
.step{counter-increment:s;background:#fff;border:1px solid rgba(89,126,247,.16);border-radius:16px;padding:20px 20px 20px 58px;position:relative}
.step:before{content:counter(s);position:absolute;left:18px;top:18px;width:28px;height:28px;display:grid;place-items:center;border-radius:50%;background:#ECF0FF;color:#597EF7;font-weight:900}
.faq-list details,.faq-item{background:#fff;border:1px solid rgba(89,126,247,.16);border-radius:16px;padding:18px 20px;margin:12px 0}
.faq-item h3{margin:0 0 8px;color:#1D2B5F}
.faq-item p{margin:0;color:#5B647A;line-height:1.8}
.app-banner{background:linear-gradient(135deg,#ECF0FF,#EAF7FF);border:1px solid rgba(89,126,247,.16);border-radius:18px;padding:28px;display:flex;justify-content:space-between;gap:20px;align-items:center}
.app-banner h2{color:#1D2B5F;margin:0 0 8px}
.app-banner p{color:#5B647A;margin:0;line-height:1.8}
.floating-tools{position:fixed;right:14px;top:42%;z-index:8000;display:flex;flex-direction:column;gap:8px;width:112px}
.floating-tools a,.floating-tools button{background:#fff;color:#597EF7;border:1px solid rgba(89,126,247,.16);border-radius:999px;padding:10px 12px;text-align:center;text-decoration:none;font-weight:800;box-shadow:0 10px 24px rgba(89,126,247,.12);font-family:inherit}
.floating-tools .main-btn{color:#fff;border:0;min-width:auto}
.site-footer{background:#1F1F1F;color:#D7DCE8;padding:48px 0 28px}
.footer-grid{width:min(1200px,calc(100% - 40px));margin:auto;display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:30px}
.site-footer h2{font-size:16px;color:#fff;margin:0 0 12px}
.site-footer a:not(.site-logo){display:block;color:#D7DCE8;text-decoration:none;margin:10px 0}
.footer-brand p{line-height:1.8;margin-top:16px}
.footer-bottom{width:min(1200px,calc(100% - 40px));margin:28px auto 0;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);line-height:1.8;color:#BFC6D4}
.footer-logo-text{color:#fff}
.mobile-drawer,.drawer-overlay,.mobile-bottom{display:none}
.callout{background:#ECF0FF;border-radius:16px;padding:20px 22px;line-height:1.85;color:#1D2B5F}
.mini-tag{display:inline-block;background:#ECF0FF;color:#597EF7;font-weight:800;border-radius:999px;padding:6px 10px;font-size:13px}
.split-index{display:grid;grid-template-columns:280px 1fr;gap:28px}
.toc{position:sticky;top:120px;align-self:start}
.toc a{display:block;padding:10px 0;text-decoration:none;color:#1D2B5F;font-weight:700}
.table-like{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.table-like>div{background:#fff;border:1px solid rgba(89,126,247,.16);border-radius:16px;padding:18px}
.table-like h3{margin:0 0 8px;color:#1D2B5F}
.table-like p{margin:0;color:#5B647A;line-height:1.8}

@media(max-width:1120px){
.nav-core{gap:3px}
.nav-core a{padding:8px 7px;font-size:14px}
.floating-tools{display:none}
.grid-4{grid-template-columns:repeat(3,minmax(0,1fr))}
}

@media(max-width:820px){
.header-inner{min-height:64px;padding:0 14px;display:grid;grid-template-columns:92px 1fr 92px;gap:8px}
.nav-core,.header-actions,.channel-strip{display:none}
.menu-btn{display:flex;width:42px;height:42px;border:0;background:transparent;flex-direction:column;gap:5px;justify-content:center;padding:9px}
.menu-btn span{display:block;height:2px;background:#1D2B5F;border-radius:2px}
.header-inner>.site-logo{justify-self:center}
.site-logo img{height:34px;max-width:150px}
.mobile-register{display:inline-flex;justify-self:end;height:40px;min-width:88px;padding:0 12px;font-size:14px}
.site-main{padding-bottom:74px}
.mobile-drawer{display:block;position:fixed;left:0;top:0;bottom:0;width:min(84vw,320px);background:#fff;z-index:10002;transform:translateX(-105%);transition:transform .25s ease;overflow:auto;padding:18px}
.mobile-drawer.is-open{transform:translateX(0)}
.drawer-overlay{display:none;position:fixed;inset:0;background:rgba(16,24,39,.46);z-index:10001;opacity:0;pointer-events:none;transition:opacity .18s ease}
.drawer-overlay.is-visible{display:block;opacity:1;pointer-events:auto}
.drawer-top{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:14px;border-bottom:1px solid #ECF0FF}
.drawer-close{border:0;background:#ECF0FF;width:40px;height:40px;border-radius:50%;font-size:28px;color:#1D2B5F}
.drawer-nav section{padding:14px 0;border-bottom:1px solid #EEF1F7}
.drawer-nav h2{font-size:14px;color:#597EF7;margin:0 0 8px}
.drawer-links{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.drawer-links a{padding:8px 4px;text-decoration:none;color:#1D2B5F;font-weight:700}
.mobile-bottom{display:grid;grid-template-columns:repeat(4,1fr);position:fixed;left:0;right:0;bottom:0;z-index:9000;background:#fff;border-top:1px solid rgba(89,126,247,.16);padding-bottom:env(safe-area-inset-bottom)}
.mobile-bottom a{text-align:center;text-decoration:none;padding:14px 4px;color:#1D2B5F;font-weight:800}
.section{padding:50px 0}
.page-hero{padding:50px 0 34px}
.page-hero h1{font-size:34px}
.section-title{font-size:30px}
.grid-3,.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
.feature-row,.feature-row.reverse{grid-template-columns:1fr}
.feature-row.reverse .feature-media{order:0}
.split-index{grid-template-columns:1fr}
.toc{position:static}
.footer-grid{grid-template-columns:1fr 1fr}
.hero-slider{height:270px}
}

@media(max-width:520px){
.container,.narrow{width:min(100% - 28px,1200px)}
.page-hero h1{font-size:30px}
.page-hero p{font-size:16px}
.hero-slider{height:205px}
.hero-slide{padding:12px}
.grid-3{grid-template-columns:1fr}
.grid-4{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.card{padding:18px}
.topic-card .media{height:162px}
.feature-media .media{height:220px}
.app-banner{display:block}
.app-banner .main-btn{margin-top:16px}
.footer-grid{grid-template-columns:1fr}
.table-like{grid-template-columns:1fr}
.section{padding:42px 0}
.section-title{font-size:28px}
}