*{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;line-height:1.8;overflow-x:hidden}
body.drawer-lock{overflow:hidden}
a{color:#365FD9;text-decoration:none}
a:hover{color:#597EF7}
img{max-width:100%}
button,input{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,.drawer-logo,.footer-logo{display:inline-flex;align-items:center;flex:0 0 auto}
.site-logo img,.drawer-logo img{display:block;height:40px;width:auto;max-width:168px;object-fit:contain}
.footer-logo img{display:block;height:38px;width:auto;max-width:160px;object-fit:contain}
.logo-placeholder{display:inline-flex;align-items:center;justify-content:center;height:40px;min-width:132px;padding:0 14px;border-radius:12px;background:#ECF0FF;color:#1D2B5F;font-weight:800;letter-spacing:.08em}
.logo-placeholder.dark{background:#2B3343;color:#fff}
.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}
.plain-auth{font-weight:700;color:#1D2B5F}
.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:#FFFFFF!important;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-toggle,.mobile-register{display:none}
.channel-bar{background:#fff;border-bottom:1px solid rgba(89,126,247,.10)}
.channel-inner{max-width:1200px;margin:0 auto;padding:0 20px;display:flex;align-items:center;gap:4px;overflow-x:auto;scrollbar-width:thin;white-space:nowrap}
.channel-inner a{display:inline-flex;padding:11px 9px;color:#5B647A;font-size:14px;font-weight:700}
.channel-inner a:hover,.channel-inner a.is-current{color:#597EF7}
.site-main{min-height:60vh}
.wrap{width:min(1200px,calc(100% - 40px));margin:0 auto}
.narrow{width:min(840px,calc(100% - 40px));margin:0 auto}
.page-hero{padding:64px 0 38px}
.page-hero.compact{padding-bottom:22px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;margin:0 0 12px;color:#597EF7;font-size:14px;font-weight:800;letter-spacing:.08em;text-transform:uppercase}
h1,h2,h3{color:#1D2B5F;line-height:1.25;margin-top:0}
h1{font-size:clamp(30px,4vw,48px);letter-spacing:-.03em;margin-bottom:18px}
h2{font-size:clamp(24px,2.7vw,34px);margin-bottom:14px}
h3{font-size:20px;margin-bottom:9px}
p{margin:0 0 16px}
.lead{font-size:18px;color:#4A556F;max-width:820px}
.muted{color:#5B647A}
.section{padding:58px 0}
.section.tight{padding:34px 0}
.section.soft{background:linear-gradient(180deg,#F6F8FF 0%,#ECF0FF 100%)}
.section.white{background:#fff}
.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:24px;box-shadow:0 16px 40px rgba(89,126,247,.10);min-width:0}
.card.flat{box-shadow:none}
.card p:last-child{margin-bottom:0}
.card .text-link{font-weight:800}
.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::after{content:"图片暂未提供";position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:#8290B4;font-size:14px;font-weight:700}
.media.card-media{height:174px;aspect-ratio:auto}
.media.feature-media{height:248px;aspect-ratio:auto}
.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);align-items:center;gap:34px}
.split.reverse .media-wrap{order:2}.split.reverse .copy{order:1}
.pill-row{display:flex;gap:10px;overflow-x:auto;padding:8px 0 4px;white-space:nowrap;scrollbar-width:thin}
.pill-row a{flex:0 0 auto;background:#fff;border:1px solid rgba(89,126,247,.16);color:#1D2B5F;border-radius:999px;padding:9px 15px;font-weight:700}
.observation{margin:28px auto;padding:18px 22px;border-left:4px solid #597EF7;border-radius:14px;background:#fff;box-shadow:0 12px 30px rgba(89,126,247,.08);color:#49536B}
.hero-wrap{padding:34px 0 18px}
.hero-carousel{position:relative;height:370px;border-radius:18px;overflow:hidden;background:#101827;box-shadow:0 18px 46px rgba(16,24,39,.20)}
.hero-slide{position:absolute;inset:0;opacity:0;visibility:hidden;transition:opacity .45s ease;display:flex;align-items:center;justify-content:center}
.hero-slide.is-active{opacity:1;visibility:visible}
.hero-slide .media{height:100%;border-radius:0;background:#101827}
.hero-slide .media>img{object-fit:contain}
.hero-slide .media.placeholder::after{color:#C9D2EA}
.hero-prev,.hero-next{position:absolute;top:50%;transform:translateY(-50%);z-index:5;width:42px;height:42px;border:1px solid rgba(255,255,255,.3);border-radius:50%;background:rgba(16,24,39,.62);color:#fff;cursor:pointer}
.hero-prev{left:14px}.hero-next{right:14px}
.hero-dots{position:absolute;left:50%;bottom:14px;transform:translateX(-50%);z-index:5;display:flex;gap:8px}
.hero-dot{width:9px;height:9px;padding:0;border:0;border-radius:50%;background:rgba(255,255,255,.46);cursor:pointer}
.hero-dot.is-active{width:28px;border-radius:999px;background:#fff}
.topic-grid .card{padding:16px}
.topic-grid .card h3{margin:12px 0 6px}
.topic-grid .card p{font-size:14px;color:#5B647A}
.app-banner{display:grid;grid-template-columns:1.3fr .7fr;align-items:center;gap:24px;padding:34px;border-radius:18px;background:linear-gradient(135deg,#ECF0FF,#EAF7FF);border:1px solid rgba(89,126,247,.16)}
.app-banner .badge-stack{display:flex;gap:10px;justify-content:flex-end;flex-wrap:wrap}
.app-banner .badge{background:#fff;border-radius:14px;padding:12px 14px;color:#1D2B5F;font-weight:800;box-shadow:0 10px 24px rgba(89,126,247,.10)}
.notice{padding:22px;border-radius:16px;background:#fff;border:1px solid rgba(89,126,247,.16)}
.notice strong{color:#1D2B5F}
.kicker-list,.steps,.check-list,.link-list{margin:0;padding:0;list-style:none}
.kicker-list li,.check-list li{position:relative;padding:10px 0 10px 26px;border-bottom:1px solid #EDF0F8}
.kicker-list li:last-child,.check-list li:last-child{border-bottom:0}
.kicker-list li::before,.check-list li::before{content:"";position:absolute;left:3px;top:20px;width:8px;height:8px;border-radius:50%;background:#597EF7}
.steps{counter-reset:step;display:grid;gap:14px}
.steps li{counter-increment:step;padding:18px 18px 18px 62px;position:relative;background:#fff;border:1px solid rgba(89,126,247,.16);border-radius:16px}
.steps li::before{content:counter(step);position:absolute;left:18px;top:18px;width:30px;height:30px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:#ECF0FF;color:#597EF7;font-weight:800}
.link-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.link-list a{display:block;padding:16px 18px;background:#fff;border:1px solid rgba(89,126,247,.16);border-radius:14px;font-weight:800}
.faq-list{display:grid;gap:14px}
.faq-item{background:#fff;border:1px solid rgba(89,126,247,.16);border-radius:16px;padding:22px}
.faq-item h2,.faq-item h3{margin-bottom:9px}
.timeline{position:relative;margin:10px 0 0;padding-left:28px}
.timeline::before{content:"";position:absolute;left:6px;top:8px;bottom:8px;width:2px;background:#DDE4FF}
.timeline-item{position:relative;padding:0 0 26px 20px}
.timeline-item::before{content:"";position:absolute;left:-27px;top:8px;width:12px;height:12px;border-radius:50%;background:#597EF7;box-shadow:0 0 0 5px #ECF0FF}
.table-like{display:grid;gap:1px;background:#DDE4FF;border:1px solid #DDE4FF;border-radius:16px;overflow:hidden}
.table-row{display:grid;grid-template-columns:180px 1fr;background:#fff}
.table-row>div{padding:16px 18px}
.table-row>div:first-child{font-weight:800;color:#1D2B5F;background:#F8FAFF}
.quote{padding:20px 22px;border-radius:16px;background:#ECF0FF;color:#36466C;font-size:17px}
.inline-links{display:flex;gap:10px;flex-wrap:wrap}
.inline-links a{display:inline-flex;padding:8px 12px;border-radius:999px;background:#fff;border:1px solid rgba(89,126,247,.16);font-weight:700}
.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:1.4fr 1fr 1fr 1fr;gap:28px}
.site-footer h2{font-size:16px;color:#fff;margin-bottom:14px}
.site-footer a{display:block;color:#D7DCE8;margin:7px 0}
.site-footer a:hover{color:#fff}
.footer-brand p{max-width:360px;margin-top:18px}
.footer-bottom{width:min(1200px,calc(100% - 40px));margin:34px auto 0;padding-top:22px;border-top:1px solid #373737;font-size:14px;color:#ABB3C3;display:flex;justify-content:space-between;gap:20px}
.footer-bottom p{margin:0}
.floating-tools{position:fixed;right:14px;top:50%;transform:translateY(-50%);z-index:200;display:flex;flex-direction:column;gap:8px;width:112px}
.floating-tools>a,.floating-tools>button{border:1px solid rgba(89,126,247,.18);background:#fff;color:#365FD9;border-radius:13px;padding:10px 8px;text-align:center;font-size:13px;font-weight:800;box-shadow:0 10px 24px rgba(89,126,247,.10);cursor:pointer}
.floating-tools .float-register{height:40px;min-width:0;color:#fff;border-radius:999px}
.mobile-bottom{display:none}
.drawer-overlay{position:fixed;inset:0;background:rgba(16,24,39,.42);z-index:10010;opacity:0;transition:opacity .18s ease}
.drawer-overlay.is-show{opacity:1}
.mobile-drawer{position:fixed;left:0;top:0;bottom:0;z-index:10020;width:min(84vw,320px);background:#fff;transform:translateX(-104%);transition:transform .22s ease;box-shadow:18px 0 50px rgba(16,24,39,.18);display:flex;flex-direction:column}
.mobile-drawer.is-open{transform:translateX(0)}
.drawer-head{min-height:70px;padding:0 16px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #EDF0F8}
.drawer-close{width:38px;height:38px;border:0;border-radius:50%;background:#ECF0FF;color:#1D2B5F;font-size:26px;cursor:pointer}
.drawer-scroll{padding:14px 16px 28px;overflow-y:auto}
.drawer-scroll section{padding:10px 0 14px;border-bottom:1px solid #EDF0F8}
.drawer-scroll h2{font-size:13px;color:#8A93A8;margin:0 0 5px;text-transform:uppercase;letter-spacing:.08em}
.drawer-scroll a{display:block;padding:8px 6px;color:#1D2B5F;font-weight:700}
.tag{display:inline-flex;padding:5px 9px;background:#ECF0FF;color:#597EF7;border-radius:999px;font-size:12px;font-weight:800;margin-right:6px}
.stateless-score{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.stateless-score div{padding:20px;background:#fff;border-radius:16px;border:1px solid rgba(89,126,247,.16)}
.stateless-score strong{display:block;color:#1D2B5F;font-size:18px}
.article h2{margin-top:34px}
.article h3{margin-top:26px}
.article ul,.article ol{padding-left:22px}
.article li{margin:8px 0}
@media (max-width:1320px){.floating-tools{display:none}}
@media (max-width:980px){
  .nav-core{display:none}.desktop-auth{display:none}.channel-bar{display:none}
  .menu-toggle{display:inline-flex;width:42px;height:42px;padding:9px;border:0;border-radius:12px;background:#fff;flex-direction:column;justify-content:center;gap:4px}
  .menu-toggle span{display:block;width:22px;height:2px;background:#1D2B5F;border-radius:2px}
  .mobile-register{display:inline-flex;min-width:86px;padding:0 14px;height:40px;font-size:14px}
  .header-actions{display:none}
  .header-inner{min-height:64px;padding:0 14px;gap:10px}
  .site-logo{position:absolute;left:50%;transform:translateX(-50%);max-width:138px}
  .site-logo img{max-width:138px;height:36px}
  .hero-carousel{height:290px}
  .grid-4{grid-template-columns:repeat(3,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .site-footer{padding-bottom:112px}
  .mobile-bottom{position:fixed;display:grid;grid-template-columns:repeat(4,1fr);left:0;right:0;bottom:0;z-index:9998;background:#fff;border-top:1px solid #E5EAF7;box-shadow:0 -8px 24px rgba(89,126,247,.10);padding-bottom:env(safe-area-inset-bottom)}
  .mobile-bottom a{display:flex;min-height:58px;align-items:center;justify-content:center;flex-direction:column;gap:2px;color:#5B647A;font-size:12px;font-weight:700}
  .mobile-bottom span{font-size:18px;color:#597EF7;line-height:1}
  .split{gap:24px}
}
@media (max-width:760px){
  .wrap,.narrow{width:min(100% - 28px,1200px)}
  .page-hero{padding:46px 0 26px}
  h1{font-size:clamp(28px,9vw,34px)}h2{font-size:25px}
  .lead{font-size:17px}
  .section{padding:44px 0}
  .hero-wrap{padding:22px 0 12px}
  .hero-carousel{height:220px}
  .hero-prev,.hero-next{width:36px;height:36px}
  .grid-2,.grid-3{grid-template-columns:1fr}
  .grid-4{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
  .topic-grid .card{padding:13px}
  .topic-grid .card h3{font-size:16px}
  .topic-grid .card p{font-size:13px;line-height:1.55}
  .split,.split.reverse{grid-template-columns:1fr}
  .split .media-wrap,.split .copy,.split.reverse .media-wrap,.split.reverse .copy{order:initial}
  .media.feature-media{height:220px}
  .app-banner{grid-template-columns:1fr;padding:24px}
  .app-banner .badge-stack{justify-content:flex-start}
  .link-list{grid-template-columns:1fr}
  .table-row{grid-template-columns:1fr}
  .table-row>div:first-child{padding-bottom:8px}.table-row>div:last-child{padding-top:8px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:24px 18px}
  .footer-brand{grid-column:1/-1}
  .footer-bottom{display:block}
  .footer-bottom p+p{margin-top:12px}
  .stateless-score{grid-template-columns:1fr}
}
@media (max-width:430px){
  .header-inner{padding:0 10px}
  .site-logo img{max-width:122px;height:34px}
  .logo-placeholder{min-width:108px;height:34px;font-size:14px}
  .mobile-register{min-width:82px;padding:0 12px}
  .hero-carousel{height:200px}
}
@media (max-width:390px){
  .site-logo img{max-width:112px}
  .mobile-register{min-width:78px;padding:0 10px;font-size:13px}
}
@media (max-width:375px){
  .site-logo img{max-width:104px}
  .menu-toggle{width:40px;height:40px}
  .mobile-register{min-width:74px;padding:0 9px}
}

@media (min-width:1321px){.site-main{padding-right:68px}}