*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#080A0D;color:#C7CDD5;font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.8}a{color:inherit;text-decoration:none}a:hover{color:#8ED8FF}button{font:inherit;cursor:pointer}img{max-width:100%}.wrap{max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px}.site-head{position:relative;z-index:40;background:rgba(8,10,13,.96);border-bottom:1px solid rgba(255,255,255,.09)}.head-inner{height:74px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:12px}.icon-btn{width:44px;height:44px;border:1px solid #303844;background:#12161C;border-radius:10px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;color:#F5F7FA}.icon-btn span{height:2px;width:19px;background:currentColor;border-radius:2px}.brand{display:flex;align-items:center;justify-content:center;min-width:0}.brand img{height:36px;width:auto;max-width:165px;object-fit:contain}.brand strong{color:#F5F7FA;font-size:23px}.enter-btn{justify-self:end;background:#5C7CFA;color:white;padding:8px 16px;border-radius:999px;min-height:44px;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;white-space:nowrap}.enter-btn:hover{background:#7390FF;color:white}.channel-nav{background:#0D1015;border-bottom:1px solid #242a32}.channel-inner{display:flex;align-items:center;gap:32px;overflow-x:auto;white-space:nowrap;scrollbar-width:thin;min-height:46px}.channel-inner a{display:inline-flex;align-items:center;border-bottom:2px solid transparent;font-size:14px;min-height:46px;flex:none}.channel-inner a.active{color:#6EA8FF;border-bottom-color:#6EA8FF}.drawer-mask{position:fixed;inset:0;background:rgba(0,0,0,.7);z-index:45;opacity:0;transition:opacity .2s;visibility:hidden;pointer-events:none}.drawer{position:fixed;inset:0 auto 0 0;width:420px;max-width:86vw;background:#0D1015;z-index:50;transform:translateX(-103%);transition:transform .22s;visibility:hidden;pointer-events:none;display:flex;flex-direction:column;box-shadow:12px 0 45px rgba(0,0,0,.45)}body.menu-open{overflow:hidden}body.menu-open .drawer-mask{opacity:1;visibility:visible;pointer-events:auto}body.menu-open .drawer{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-head{padding:16px 22px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #2a303a;min-height:75px}.drawer-brand{color:#F5F7FA;font-size:22px;font-weight:bold}.drawer-brand img{height:35px;max-width:165px;object-fit:contain}.close-btn{border:0;background:#1B2129;color:#fff;font-size:28px;width:40px;height:40px;border-radius:10px;line-height:1}.drawer-content{overflow-y:auto;padding:6px 22px 32px}.drawer-group{margin:24px 0}.drawer-group h2{font-size:14px;color:#9098A3;font-weight:600;letter-spacing:.06em;margin:0 0 10px}.drawer-group>div{display:grid;grid-template-columns:1fr 1fr;gap:6px}.drawer-group a{font-size:14px;padding:9px 10px;border-radius:7px;line-height:1.45}.drawer-group a:hover{background:#1B2129}.drawer-group a.active{color:#6EA8FF;border-left:2px solid #6EA8FF;background:#171C23}.page{padding-top:40px;padding-bottom:65px}.eyebrow{color:#8ED8FF;letter-spacing:.1em;font-size:12px;font-weight:bold;margin:0 0 8px}.intro{max-width:850px;margin:0 0 30px;color:#C7CDD5;font-size:17px}.page h1{font-size:34px;line-height:1.35;color:#F5F7FA;margin:0 0 16px}.page h2{font-size:26px;line-height:1.38;color:#F5F7FA;margin:0 0 14px}.page h3{font-size:19px;line-height:1.4;color:#F5F7FA;margin:0 0 8px}.page p{margin:0 0 16px}.section{margin:42px 0}.section-lead{max-width:820px}.panel{background:#0D1015;border:1px solid rgba(255,255,255,.09);border-radius:13px;padding:24px}.panel-soft{background:#12161C;border:1px solid rgba(255,255,255,.09);border-radius:13px;padding:24px}.two-col{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(250px,.65fr);gap:24px}.split{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:center}.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}.reading{max-width:840px}.prose-block{margin-bottom:32px}.prose-block p{line-height:1.82}.subnav a,.inline-link,.text-link{color:#8ED8FF}.links{display:flex;flex-wrap:wrap;gap:12px;margin-top:18px}.links a{font-size:14px;padding:8px 12px;background:#171C23;border:1px solid #303844;border-radius:8px;color:#C7CDD5}.links a:hover{color:#8ED8FF;border-color:#5C7CFA}.topic-list{list-style:none;margin:0;padding:0}.topic-list li{padding:15px 0;border-bottom:1px solid #252a33}.topic-list li:last-child{border-bottom:0}.topic-list a{color:#F5F7FA;font-weight:700}.topic-list p{font-size:14px;margin:4px 0 0}.number-list{counter-reset:num}.number-item{display:grid;grid-template-columns:35px 1fr;gap:16px;border-bottom:1px solid #29313c;padding:18px 0}.number-item:before{counter-increment:num;content:counter(num,decimal-leading-zero);color:#6EA8FF;font-weight:bold;font-size:17px}.number-item h3{margin-bottom:6px}.number-item p{font-size:14px;margin-bottom:4px}.media{position:relative;width:100%;overflow:hidden;background:#0D1015;border:1px solid rgba(255,255,255,.09);border-radius:14px}.media img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;object-position:center;display:block}.media-square{aspect-ratio:1/1}.media-wide{aspect-ratio:16/9}.media-banner{aspect-ratio:16/7}.media-device{aspect-ratio:9/16;max-height:360px}.media-placeholder{background:linear-gradient(135deg,#12161C,#171C23)}.media-hero{height:310px;aspect-ratio:auto}.visual-card .media{height:170px;aspect-ratio:auto}.visual-card h3{margin:12px 0 6px}.visual-card p{font-size:14px;margin:0}.hero{display:grid;grid-template-columns:1.08fr .92fr;gap:32px;align-items:center;padding:8px 0 12px}.hero h1{font-size:42px}.hero .media{max-height:330px}.hero .hero-text p{max-width:590px}.label-line{color:#6EA8FF;font-size:12px;text-transform:uppercase;letter-spacing:.08em;font-weight:bold}.article-feature{border-left:3px solid #5C7CFA;padding-left:20px}.page-note{margin-top:26px;padding:14px 18px;border-left:3px solid #5C7CFA;background:#12161C;font-size:14px}.faq-item{padding:20px 0;border-bottom:1px solid #292f38}.faq-item h2{font-size:19px}.faq-item p{margin:0}.tag{color:#8ED8FF;font-size:12px}.site-footer{background:#050608;border-top:1px solid #232832;padding-top:48px}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px}.footer-grid h2{color:#F5F7FA;font-size:16px;margin:0 0 16px}.footer-grid a{display:block;font-size:14px;margin:4px 0}.footer-grid p{font-size:14px}.footer-brand img{height:35px;object-fit:contain;width:auto}.footer-brand strong{font-size:23px;color:#F5F7FA}.footer-bottom{border-top:1px solid #242a32;padding-top:24px;padding-bottom:28px;margin-top:30px;display:flex;justify-content:space-between;gap:20px;font-size:13px}.footer-bottom p{margin:0}.back-top{position:fixed;right:20px;bottom:20px;width:42px;height:42px;background:#171C23;border:1px solid #424b58;border-radius:10px;color:#fff;z-index:20;opacity:0;visibility:hidden;transition:.2s}.back-top.visible{opacity:1;visibility:visible}a:focus-visible,button:focus-visible{outline:2px solid #8ED8FF;outline-offset:3px}@media(max-width:980px){.wrap{padding-left:20px;padding-right:20px}.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.hero h1{font-size:38px}}@media(max-width:700px){.wrap{padding-left:16px;padding-right:16px}.head-inner{height:62px;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);gap:6px}.icon-btn{width:40px;height:40px}.brand img{height:28px;max-width:112px}.brand strong{font-size:18px;white-space:nowrap}.enter-btn{height:40px;min-height:40px;padding:7px 11px;font-size:12px}.channel-inner{gap:22px}.channel-inner a{font-size:13px}.page{padding-top:27px;padding-bottom:40px}.page h1{font-size:27px}.page h2{font-size:21px}.page h3{font-size:17px}.page p{font-size:15px}.intro{font-size:15px}.section{margin:30px 0}.hero{display:flex;flex-direction:column-reverse;gap:22px}.hero>*{width:100%}.hero h1{font-size:30px}.media-hero{height:205px}.visual-card .media{height:140px}.panel,.panel-soft{padding:17px}.two-col,.split{grid-template-columns:1fr;gap:20px}.grid-3,.grid-4{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:26px}.footer-bottom{flex-direction:column;gap:8px}.drawer{width:min(86vw,340px)}.links{gap:8px}.links a{font-size:13px}.visual-card h3{font-size:16px}.visual-card p{font-size:13px}.media-device{max-width:235px;margin:auto}.section-lead{font-size:15px}}@media(max-width:350px){.grid-3{grid-template-columns:1fr}.head-inner{gap:3px}.enter-btn{padding:6px 8px;font-size:11px}.brand img{max-width:92px}.hero h1{font-size:28px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important}}
.portal-card{display:block;transition:transform .2s,border-color .2s}.portal-card:hover{transform:translateY(-3px);border-color:#5C7CFA}.portal-card h3{margin:9px 0}.portal-card p{font-size:14px}.section-heading{margin-bottom:18px}.feature-image{max-width:800px}.number-item a:hover{color:#8ED8FF}@media(max-width:700px){.portal-card{min-height:0}.section-heading{margin-bottom:14px}}

.hero{border-bottom:1px solid rgba(255,255,255,.09);padding-bottom:28px}.portal-card{min-height:175px}.feature-image{max-width:760px;margin-bottom:26px}.number-list{border-top:1px solid #29313c}.visual-card{min-width:0}.page .reading h2{margin-top:15px}@media(max-width:700px){.portal-card{min-height:0}.hero{padding-bottom:18px}}