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28px;height:64px;justify-content:space-between}.bi-brand,.bi-header-inner{display:flex;align-items:center}.bi-brand{gap:12px}.bi-brand-mark{color:var(--g);font-size:14px}.bi-brand-stack{display:flex;flex-direction:column}.bi-brand-name{font-family:var(--sf);font-size:22px;font-weight:400;letter-spacing:5px;line-height:1}.bi-brand-sub{font-size:8px;letter-spacing:4.5px;color:var(--txd);margin-top:2px}.bi-nav{display:flex;align-items:center;gap:16px}.bi-nav-link{font-size:12px;letter-spacing:1.5px;color:var(--txd);text-transform:uppercase}.bi-lang{position:relative}.bi-lang-btn{list-style:none;cursor:pointer;display:inline-flex;align-items:center;gap:6px;border:1px solid var(--bd);padding:7px 14px;border-radius:8px;color:var(--txd);font-size:12px}.bi-lang-btn::-webkit-details-marker{display:none}.bi-lang[open] .bi-lang-btn{color:var(--tx)}.bi-lang-menu{position:absolute;top:calc(100% + 6px);right:0;background:var(--bg-2);border:1px solid 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16px}.bi-article-summary{font-size:16px;line-height:1.7;color:var(--txd);margin:0 0 24px}.bi-article-meta{gap:12px;font-size:12px;color:var(--txm);align-items:center}.bi-article-meta,.bi-tags{display:flex;flex-wrap:wrap}.bi-tags{gap:6px}.bi-tag{background:var(--g-soft);color:var(--g);padding:3px 10px;border-radius:4px;font-size:11px}.bi-article-cover{margin-top:28px;border-radius:8px;overflow:hidden}.bi-article-body{font-size:16px;line-height:1.85;color:#d9d3cb}.bi-article-body p{margin:0 0 22px}.bi-article-body h2{font-size:24px;line-height:1.4;margin:48px 0 16px;padding-bottom:8px;border-bottom:1px solid var(--bd-soft)}.bi-article-body h2,.bi-article-body h3{font-family:var(--sf);font-weight:500;color:var(--tx)}.bi-article-body h3{font-size:19px;margin:36px 0 12px}.bi-article-body .bi-list,.bi-article-body ol,.bi-article-body ul{margin:0 0 22px;padding-left:22px}.bi-article-body li{margin:6px 0}.bi-article-body strong{color:var(--tx);font-weight:500}.bi-article-body 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8px}.bi-cat-count{font-size:13px;color:var(--txd);margin:0}.bi-about{max-width:var(--maxw-read);margin:0 auto;padding:80px 28px}.bi-about-head{text-align:center;margin-bottom:48px}.bi-about-title{font-family:var(--sf);font-size:clamp(28px,4.5vw,40px);font-weight:400;margin:16px 0 24px}.bi-about-intro{font-size:15px;line-height:1.9;color:var(--txd)}.bi-about-body{font-size:15px;line-height:1.85}.bi-about-section{margin-bottom:40px}.bi-about-section h2{font-family:var(--sf);font-size:22px;font-weight:500;margin:0 0 16px;color:var(--tx);padding-bottom:8px;border-bottom:1px solid var(--bd-soft)}.bi-about-section ul{margin:0;padding-left:22px;color:#d9d3cb}.bi-about-section li{margin:8px 0}.bi-footer{border-top:1px solid var(--bd-soft);background:#050505}.bi-footer-inner{max-width:var(--maxw);margin:0 auto;padding:48px 28px;text-align:center}.bi-footer-brand{display:flex;justify-content:center;align-items:center;gap:10px;margin-bottom:20px}.bi-footer-addr{font-size:12px;color:var(--txm);font-style:normal;line-height:1.8}.bi-footer-addr a{color:var(--txd)}.bi-footer-disclaimer{font-size:11px;color:var(--txm);margin:20px auto 16px;max-width:560px;line-height:1.7}.bi-footer-copy{font-size:10px;color:var(--txm);letter-spacing:2px;margin:0}@media (max-width:640px){.bi-hero{padding:80px 24px 60px}.bi-article{padding:32px 22px 60px}.bi-article-body{font-size:15px}}