:root{--bg:#07111A;--deep:#050B12;--panel:#0D1B2A;--panel2:#102538;--card:#132B3E;--text:#D7E2EA;--title:#F4F8FC;--muted:#9CB0C0;--aux:#748A9D;--blue:#2F80ED;--light:#56A8F5;--darkblue:#174A7E;--cyan:#2A9DAD;--line:rgba(86,168,245,.20);--shadow:0 14px 36px rgba(0,0,0,.26)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:linear-gradient(180deg,var(--bg),var(--deep));color:var(--text);font-family:system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden}body.is-locked{overflow:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}.shell{width:min(1080px,calc(100% - 32px));margin:auto}.topbar{position:fixed;z-index:90;top:0;left:0;right:0;height:18px;background:#050B12;color:#C9D8E3;font-size:12px}.topbar-inner{height:18px;display:flex;align-items:center;justify-content:space-between}.text-button{border:0;background:none;color:#C9D8E3;padding:0 2px}.brandbar{position:fixed;z-index:88;top:18px;left:0;right:0;height:54px;background:rgba(13,27,42,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(10px)}.brandbar-inner{height:54px;display:flex;align-items:center;justify-content:space-between}.brand img,.menu-brand img,.footer-brand img{height:24px;width:auto;max-width:150px;object-fit:contain}.brand strong{font-size:16px;color:var(--title)}.brand-actions{display:flex;align-items:center;gap:8px}.app-link,.btn{min-height:42px;display:inline-flex;align-items:center;justify-content:center;border-radius:12px;padding:0 16px;font-size:14px}.app-link{min-height:38px;border:1px solid var(--line);background:#102538;color:#fff}.menu-button{width:44px;height:44px;border:0;background:transparent;display:grid;place-content:center;gap:4px}.menu-button span{display:block;width:20px;height:2px;background:#fff;border-radius:2px}.quicknav{position:fixed;z-index:80;top:72px;left:0;right:0;background:rgba(5,11,18,.92);border-bottom:1px solid rgba(86,168,245,.12)}.quicknav-inner{height:46px;display:flex;align-items:center;gap:8px}.quicknav a{padding:8px 14px;border-radius:10px;color:var(--muted);font-size:13px}.quicknav a:hover,.quicknav a.is-current{background:linear-gradient(135deg,#174A7E,#2F80ED);color:#fff;box-shadow:0 6px 16px rgba(47,128,237,.24)}main{padding-top:138px;min-height:70vh}.overlay{position:fixed;z-index:100;inset:0;background:rgba(0,0,0,.52);visibility:hidden;opacity:0;pointer-events:none;transition:.18s}.overlay.is-visible{visibility:visible;opacity:1;pointer-events:auto}.menu-panel{position:fixed;z-index:110;top:78px;right:max(16px,calc((100vw - 1080px)/2));width:min(440px,calc(100vw - 32px));max-height:68vh;overflow:auto;background:#0D1B2A;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);visibility:hidden;opacity:0;pointer-events:none;transform:translateY(-8px);transition:.18s}.menu-panel.is-visible{visibility:visible;opacity:1;pointer-events:auto;transform:none}.menu-head{position:sticky;top:0;background:#0D1B2A;display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border-bottom:1px solid var(--line)}.menu-head button,.search-head button{width:44px;height:44px;border:0;border-radius:10px;background:#102538;color:#fff;font-size:24px}.menu-brand{display:flex;align-items:center;gap:10px}.menu-brand div{display:grid}.menu-brand strong{color:var(--title);font-size:16px}.menu-brand small{color:var(--aux)}.menu-groups{padding:8px 16px 18px}.menu-groups section+section{margin-top:14px}.menu-groups h2{font-size:13px;color:var(--light);margin:8px 0}.menu-groups a{display:grid;padding:10px 12px;border-radius:10px}.menu-groups a:hover{background:#102538}.menu-groups strong{color:var(--title);font-size:14px}.menu-groups span{font-size:12px;color:var(--muted)}.search-panel{position:fixed;z-index:115;top:78px;left:0;right:0;display:flex;justify-content:center;visibility:hidden;opacity:0;pointer-events:none;transition:.18s}.search-panel.is-visible{visibility:visible;opacity:1;pointer-events:auto}.search-card{width:min(660px,calc(100vw - 32px));background:#0D1B2A;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);padding:16px}.search-head{display:flex;align-items:center;justify-content:space-between}.search-head strong{font-size:18px;color:var(--title)}.search-card p{color:var(--muted);margin:4px 0 12px}.search-card input{width:100%;height:46px;border-radius:12px;border:1px solid var(--line);background:#07111A;color:#fff;padding:0 14px;outline:none}.search-results{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;margin-top:12px}.search-results a{padding:12px;border-radius:10px;background:#102538;border:1px solid transparent}.search-results a:hover{border-color:var(--light)}.hero,.section,.article-wrap{padding:28px 0}.hero-grid{display:grid;grid-template-columns:1.18fr .82fr;gap:28px;align-items:center}.eyebrow{display:inline-block;color:#89C5FA;font-size:13px;letter-spacing:.06em;margin-bottom:8px}.hero h1,.page-head h1{margin:0;color:var(--title);font-size:24px;line-height:1.3}.hero h1 em{font-style:normal;color:var(--light)}.lead{color:var(--muted);font-size:16px;max-width:760px}.hero-actions,.inline-links{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}.btn{border:1px solid var(--line)}.btn-primary{background:linear-gradient(135deg,#56A8F5 0%,#2F80ED 52%,#174A7E 100%);color:#fff;box-shadow:0 6px 16px rgba(47,128,237,.24)}.btn-secondary{background:#102538;color:#fff}.btn:hover{filter:brightness(1.08);box-shadow:0 0 0 3px rgba(86,168,245,.30),0 10px 24px rgba(47,128,237,.30)}.btn:active{filter:brightness(1.12);box-shadow:0 0 0 4px rgba(86,168,245,.35),0 0 22px rgba(47,128,237,.48)}:focus-visible{outline:2px solid #56A8F5;outline-offset:2px}.media-box{min-height:220px;background:linear-gradient(145deg,#102538,#07111A);border:1px solid var(--line);border-radius:14px;display:grid;place-items:center;padding:18px}.media-box img{max-width:100%;max-height:320px;width:100%;height:100%;object-fit:contain;object-position:center}.brand-visual{min-height:260px}.section-title{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:14px}.section-title h2{margin:0;color:var(--title);font-size:20px}.section-title a{color:var(--light);font-size:13px}.feature-row{display:grid;grid-template-columns:.85fr 1.15fr;gap:24px;align-items:center;padding:20px;border:1px solid var(--line);border-radius:16px;background:rgba(13,27,42,.7)}.feature-row.reverse{grid-template-columns:1.15fr .85fr}.feature-row.reverse .media-box{order:2}.feature-row h3,.content-card h3{font-size:16px;color:var(--title);margin:0 0 6px}.feature-row p{margin:0;color:var(--muted)}.split-grid,.content-grid{display:grid;grid-template-columns:1.5fr .8fr;gap:24px}.content-grid{grid-template-columns:repeat(2,1fr)}.article{max-width:820px}.article p{margin:0 0 15px}.article h2{font-size:20px;color:var(--title);margin:28px 0 10px}.article h3{font-size:16px;color:var(--title);margin:20px 0 8px}.side-card,.content-card,.step,.faq-item{background:#0D1B2A;border:1px solid var(--line);border-radius:14px;padding:18px}.side-card{height:max-content;position:sticky;top:138px}.side-card h2{font-size:16px;color:var(--title);margin:0 0 10px}.side-card a{display:block;padding:7px 0;color:#9fd0fb}.page-head{padding:20px 0 8px}.page-head p{max-width:820px;color:var(--muted)}.tagline{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}.tagline span{font-size:12px;color:#B9D8F4;background:#102538;border:1px solid var(--line);border-radius:999px;padding:5px 10px}.faq-list{display:grid;gap:12px}.faq-item h2{font-size:16px;margin:0 0 8px;color:var(--title)}.faq-item p{margin:0;color:var(--muted)}.steps{display:grid;gap:12px;counter-reset:step}.step{position:relative;padding-left:70px}.step:before{counter-increment:step;content:counter(step);position:absolute;left:18px;top:18px;width:34px;height:34px;display:grid;place-items:center;border-radius:50%;background:linear-gradient(135deg,#56A8F5,#174A7E);color:#fff;font-weight:700}.link-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.link-card{display:block;padding:16px;border-radius:14px;background:#0D1B2A;border:1px solid var(--line)}.link-card strong{display:block;color:var(--title)}.link-card span{color:var(--muted);font-size:13px}.site-footer{margin-top:40px;background:#040A10;border-top:1px solid var(--line);padding:34px 0 78px;color:#C9D8E3}.footer-grid{display:grid;grid-template-columns:1.2fr repeat(3,1fr);gap:24px}.footer-grid h2{font-size:13px;color:#fff;margin:0 0 8px}.footer-grid a{display:block;font-size:13px;color:#9CB0C0;padding:4px 0}.footer-brand{display:flex;flex-direction:column;gap:4px}.footer-brand strong{color:#fff}.footer-brand span{font-size:12px;color:#748A9D}.footer-note{margin-top:24px;padding-top:16px;border-top:1px solid rgba(86,168,245,.13);font-size:13px;color:#748A9D}.mobile-bottom{display:none}
@media(max-width:760px){.shell{width:min(100% - 32px,1080px)}.quicknav{display:none}main{padding-top:92px}.hero-grid,.split-grid,.content-grid,.feature-row,.feature-row.reverse,.footer-grid{grid-template-columns:1fr}.feature-row.reverse .media-box{order:0}.hero{padding-top:18px}.hero .media-box{min-height:180px}.side-card{position:static}.menu-panel{top:76px;max-height:calc(100vh - 92px)}.search-panel{top:0;bottom:0;background:#07111A;padding:16px;align-items:flex-start}.search-card{width:100%;margin-top:20px;box-shadow:none}.search-results{grid-template-columns:1fr}.mobile-bottom{position:fixed;z-index:85;left:0;right:0;bottom:0;height:calc(50px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:#07111A;border-top:1px solid var(--line);display:grid;grid-template-columns:repeat(4,1fr)}.mobile-bottom a{display:grid;place-items:center;font-size:13px;color:var(--muted)}.mobile-bottom a.is-current{color:#fff;background:linear-gradient(135deg,#174A7E,#2F80ED);box-shadow:0 6px 16px rgba(47,128,237,.24)}.site-footer{padding-bottom:86px}.link-grid{grid-template-columns:1fr}.step{padding-left:62px}}