:root{--bt-vermilion: #cd2a14;--bt-vermilion-dark: #b5240f;--bt-vermilion-tint: #fbe6df;--bt-orange: #ec632b;--bt-orange-dark: #d4521f;--bt-green: #8cc63f;--bt-green-dark: #5b8a1e;--bt-green-tint: #f1f7e6;--bt-cream: #fbf9f6;--bt-n-50: #f4f1ec;--bt-n-100: #ece7df;--bt-n-150: #e7e4df;--bt-n-200: #d8d1c5;--bt-n-250: #cfc9c0;--bt-n-300: #c4bdb2;--bt-n-400: #b3aa9c;--bt-n-450: #a89f92;--bt-n-500: #9a9286;--bt-n-550: #8a847a;--bt-n-600: #7a746a;--bt-n-700: #5b564e;--bt-n-800: #3a352e;--bt-n-850: #34302a;--bt-ink: #221f1a;--bt-dark-brown: #2a1c14;--bt-dark-brown-2: #3a2419;--bt-bg: var(--bt-cream);--bt-surface: #ffffff;--bt-surface-soft: var(--bt-n-50);--bt-surface-muted: var(--bt-n-100);--bt-border: var(--bt-n-150);--bt-border-strong: var(--bt-n-300);--bt-text: var(--bt-ink);--bt-text-secondary: var(--bt-n-700);--bt-text-muted: var(--bt-n-550);--bt-text-placeholder: var(--bt-n-450);--bt-text-on-dark: var(--bt-cream);--bt-primary: var(--bt-vermilion);--bt-primary-hover: var(--bt-vermilion-dark);--bt-primary-tint: var(--bt-vermilion-tint);--bt-on-primary: #ffffff;--bt-accent: var(--bt-orange);--bt-success: var(--bt-green);--bt-success-text: var(--bt-green-dark);--bt-danger: var(--bt-vermilion);--bt-focus-ring: 0 0 0 3px rgba(205, 42, 20, .28);--bt-font-sans: "Outfit", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--bt-font-mono: "Space Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;--bt-fw-light: 300;--bt-fw-regular: 400;--bt-fw-medium: 500;--bt-fw-semibold: 600;--bt-fw-bold: 700;--bt-fw-black: 800;--bt-fs-xs: .75rem;--bt-fs-sm: .875rem;--bt-fs-base: 1rem;--bt-fs-md: 1.125rem;--bt-fs-lg: 1.35rem;--bt-fs-xl: 1.62rem;--bt-fs-2xl: 1.95rem;--bt-fs-3xl: 2.35rem;--bt-fs-4xl: 2.8rem;--bt-lh-tight: 1.15;--bt-lh-snug: 1.3;--bt-lh-normal: 1.55;--bt-ls-tight: -.02em;--bt-ls-mono: .02em;--bt-sp-1: .25rem;--bt-sp-2: .5rem;--bt-sp-3: .75rem;--bt-sp-4: 1rem;--bt-sp-5: 1.5rem;--bt-sp-6: 2rem;--bt-sp-7: 3rem;--bt-sp-8: 4rem;--bt-radius-xs: 4px;--bt-radius-sm: 8px;--bt-radius-md: 12px;--bt-radius-lg: 16px;--bt-radius-xl: 22px;--bt-radius-pill: 999px;--bt-shadow-sm: 0 1px 2px rgba(34, 31, 26, .06);--bt-shadow-md: 0 4px 14px rgba(34, 31, 26, .08);--bt-shadow-lg: 0 12px 32px rgba(34, 31, 26, .12);--bt-ease: cubic-bezier(.4, 0, .2, 1);--bt-transition-fast: .12s var(--bt-ease);--bt-transition: .16s var(--bt-ease);--bt-transition-slow: .2s var(--bt-ease);--bt-container: 1280px;--bt-container-gutter: var(--bt-sp-4);--bt-z-header: 50;--bt-z-dropdown: 60;--bt-z-overlay: 120;--bt-z-drawer: 200;--bt-z-modal: 500;--bt-z-toast: 600;--bt-glass-bg: rgba(255, 255, 255, .6);--bt-glass-bg-soft: rgba(255, 255, 255, .55);--bt-glass-bg-strong: rgba(255, 255, 255, .66);--bt-glass-border: rgba(255, 255, 255, .75);--bt-glass-blur: blur(14px) saturate(150%);--bt-glass-blur-lg: blur(24px) saturate(160%);--bt-glass-blur-xl: blur(30px) saturate(160%);--bt-hairline: rgba(120, 110, 95, .14);--bt-hairline-2: rgba(120, 110, 95, .16);--bt-hairline-3: rgba(120, 110, 95, .22);--bt-hairline-strong: rgba(120, 110, 95, .35);--bt-shadow-card: 0 14px 30px -22px rgba(60, 40, 15, .4);--bt-shadow-card-hover: 0 26px 46px -26px rgba(60, 40, 15, .55);--bt-shadow-prod-hover: 0 28px 50px -26px rgba(60, 40, 15, .6);--bt-shadow-pop: 0 22px 44px -18px rgba(40, 25, 10, .45);--bt-shadow-mega: 0 30px 60px -28px rgba(60, 40, 15, .45);--bt-shadow-overlay: 0 40px 80px -30px rgba(40, 25, 10, .55);--bt-shadow-btn: 0 8px 20px -8px rgba(205, 42, 20, .6);--bt-shadow-btn-hover: 0 14px 28px -10px rgba(205, 42, 20, .75);--bt-page-gradient: radial-gradient(900px 520px at 10% -8%, rgba(205, 42, 20, .12), transparent 60%), radial-gradient(820px 520px at 98% 4%, rgba(140, 198, 63, .14), transparent 60%), radial-gradient(760px 620px at 64% 26%, rgba(236, 99, 43, .08), transparent 62%), var(--bt-cream)}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scrollbar-gutter:stable}body{margin:0;background:var(--bt-bg);color:var(--bt-text);font-family:var(--bt-font-sans);font-size:var(--bt-fs-base);font-weight:var(--bt-fw-regular);line-height:var(--bt-lh-normal);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}h1,h2,h3,h4,h5,h6{margin:0 0 var(--bt-sp-3);font-family:var(--bt-font-sans);font-weight:var(--bt-fw-bold);line-height:var(--bt-lh-tight);letter-spacing:var(--bt-ls-tight);color:var(--bt-text)}h1{font-size:var(--bt-fs-3xl)}h2{font-size:var(--bt-fs-2xl)}h3{font-size:var(--bt-fs-xl)}h4{font-size:var(--bt-fs-lg)}p{margin:0 0 var(--bt-sp-4)}code,kbd,samp,.bt-mono{font-family:var(--bt-font-mono);letter-spacing:var(--bt-ls-mono)}a{color:var(--bt-primary);text-decoration:none;transition:color var(--bt-transition-fast)}a:hover{color:var(--bt-primary-hover)}img,svg,video{max-width:100%;height:auto;display:block}button,input,select,textarea{font:inherit;color:inherit}button{cursor:pointer}ul,ol{margin:0;padding:0;list-style:none}hr{border:0;border-top:1px solid var(--bt-border);margin:var(--bt-sp-5) 0}:focus-visible{outline:none;box-shadow:var(--bt-focus-ring);border-radius:var(--bt-radius-xs)}::selection{background:var(--bt-primary-tint);color:var(--bt-ink)}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-thumb{background:var(--bt-n-200);border-radius:var(--bt-radius-sm)}::-webkit-scrollbar-track{background:transparent}.bt-container{width:100%;max-width:var(--bt-container);margin-inline:auto;padding-inline:var(--bt-container-gutter)}.bt-visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media(prefers-reduced-motion:reduce){*,*:before,*:after{transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}@keyframes bt-pulse{0%,to{opacity:1}50%{opacity:.4}}@keyframes bt-shimmer{0%{background-position:100% 0}to{background-position:-100% 0}}@keyframes bt-pop{0%{opacity:0;transform:translateY(-10px) scale(.97)}to{opacity:1;transform:none}}@keyframes bt-fade{0%{opacity:0}to{opacity:1}}@keyframes bt-caret{0%,to{opacity:1}50%{opacity:0}}.bt-icon{display:block;flex:none}.bt-mono{font-family:var(--bt-font-mono);letter-spacing:var(--bt-ls-mono)}.bt-glass{background:var(--bt-glass-bg-soft);-webkit-backdrop-filter:var(--bt-glass-blur);backdrop-filter:var(--bt-glass-blur);border:1px solid var(--bt-glass-border);border-radius:var(--bt-radius-lg);box-shadow:var(--bt-shadow-card)}.bt-glass--strong{background:var(--bt-glass-bg-strong)}.bt-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:var(--bt-font-sans);font-weight:600;font-size:var(--bt-fs-sm);line-height:1;padding:13px 22px;border:1px solid transparent;border-radius:var(--bt-radius-md);cursor:pointer;text-decoration:none;white-space:nowrap;transition:transform var(--bt-transition),box-shadow var(--bt-transition),background var(--bt-transition),border-color var(--bt-transition),color var(--bt-transition)}.bt-btn:active{transform:translateY(0) scale(.97)}.bt-btn--primary{background:var(--bt-primary);color:var(--bt-on-primary);box-shadow:var(--bt-shadow-btn)}.bt-btn--primary:hover{background:var(--bt-primary-hover);color:var(--bt-on-primary);transform:translateY(-2px);box-shadow:var(--bt-shadow-btn-hover)}.bt-btn--dark{background:var(--bt-ink);color:#fff;border-radius:var(--bt-radius-sm)}.bt-btn--dark:hover{background:var(--bt-primary);color:#fff;transform:translateY(-1px)}.bt-btn--ghost{background:var(--bt-glass-bg);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-color:var(--bt-hairline-3);color:var(--bt-text)}.bt-btn--ghost:hover{background:#fff;border-color:#cd2a1466;transform:translateY(-2px)}.bt-btn--accent{background:var(--bt-accent);color:#241008;font-weight:700}.bt-btn--accent:hover{filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 16px 30px -14px #ec632bb3}.bt-btn--outline-light{background:transparent;border-color:#ffffff40;color:var(--bt-n-50)}.bt-btn--outline-light:hover{background:#ffffff1f;border-color:#ffffff80;transform:translateY(-2px)}.bt-btn--sm{padding:9px 14px;font-size:var(--bt-fs-xs);border-radius:var(--bt-radius-sm)}.bt-btn--lg{padding:15px 28px;font-size:var(--bt-fs-base);border-radius:13px}.bt-btn--block{display:flex;width:100%}.bt-pill{display:inline-flex;align-items:center;gap:6px;font-family:var(--bt-font-mono);font-size:10px;font-weight:700;padding:3px 9px;border-radius:var(--bt-radius-pill);white-space:nowrap}.bt-pill--soon{background:#ec632b29;color:var(--bt-orange);letter-spacing:.04em}.bt-pill--code{background:var(--bt-green-tint);color:var(--bt-green)}.bt-pill--compat{background:#8cc63f29;color:var(--bt-green-dark);font-family:var(--bt-font-sans)}.bt-pill--bridge{background:#ec632b29;color:var(--bt-orange);font-family:var(--bt-font-sans)}.bt-pill--used{background:#ec632b1a;border:1px solid rgba(236,99,43,.25);color:var(--bt-orange);font-family:var(--bt-font-sans);font-size:11px;padding:4px 10px}.bt-brand-badge{font-family:var(--bt-font-mono);font-size:10px;font-weight:700;color:var(--bt-n-700);background:#ffffffd9;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);padding:4px 9px;border-radius:var(--bt-radius-sm)}.bt-input{width:100%;min-width:0;border:1px solid var(--bt-hairline-3);border-radius:var(--bt-radius-sm);padding:9px 11px;font-family:var(--bt-font-sans);font-size:var(--bt-fs-sm);color:var(--bt-text);background:#fff;outline:none;transition:border-color var(--bt-transition)}.bt-input::placeholder{color:var(--bt-text-placeholder)}.bt-input:focus{border-color:#cd2a1480}.bt-input--mono{font-family:var(--bt-font-mono)}.bt-chip{display:inline-flex;align-items:center;gap:7px;background:#cd2a1412;border:1px solid rgba(205,42,20,.22);color:var(--bt-primary);font-size:12.5px;font-weight:600;padding:5px 7px 5px 12px;border-radius:var(--bt-radius-pill)}.bt-chip__x{display:flex;width:18px;height:18px;align-items:center;justify-content:center;border-radius:50%;cursor:pointer;transition:background var(--bt-transition-fast)}.bt-chip__x:hover{background:#cd2a1429}.bt-check{width:18px;height:18px;flex:none;border-radius:5px;border:1.5px solid var(--bt-hairline-strong);display:flex;align-items:center;justify-content:center;color:var(--bt-primary)}.bt-check.is-on{background:var(--bt-primary);border-color:var(--bt-primary)}.bt-check.is-on:after{content:"";width:5px;height:9px;border:2px solid #fff;border-top:0;border-left:0;transform:rotate(45deg) translateY(-1px)}.bt-skeleton{background:linear-gradient(90deg,var(--bt-n-100) 25%,var(--bt-n-50) 50%,var(--bt-n-100) 75%);background-size:400% 100%;animation:bt-shimmer 1.4s ease infinite;border-radius:var(--bt-radius-xs)}.bt-section{max-width:var(--bt-container);margin:0 auto;padding:44px 24px 16px}.bt-section__title{font-size:var(--bt-fs-2xl);font-weight:var(--bt-fw-black);letter-spacing:-.02em;margin:0}.bt-section__sub{font-size:14.5px;color:var(--bt-text-secondary);margin:6px 0 0}.bt-page{position:relative;min-height:100vh;color:var(--bt-ink);font-family:var(--bt-font-sans);background:var(--bt-page-gradient)}.bt-wrap{max-width:var(--bt-container);margin:0 auto;padding-inline:24px}.bt-topbar{background:#221f1af5;color:var(--bt-n-250);font-size:12.5px;position:relative;z-index:var(--bt-z-dropdown)}.bt-topbar__inner{max-width:var(--bt-container);margin:0 auto;padding:9px 24px;display:flex;justify-content:space-between;align-items:center}.bt-topbar__status{display:flex;gap:9px;align-items:center;min-width:0}.bt-topbar__status .dot{color:var(--bt-green);flex:none}.bt-topbar__status .txt{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.bt-topbar__caret{display:inline-block;width:7px;height:13px;background:var(--bt-green);flex:none;animation:bt-caret 1s step-end infinite}.bt-topbar__utils{display:flex;gap:4px;align-items:center;font-family:var(--bt-font-mono)}.bt-topbar__sep{color:#5d574e}.bt-topbar__btn{display:flex;align-items:center;gap:7px;padding:5px 9px;border-radius:var(--bt-radius-sm);cursor:pointer;color:var(--bt-n-250);transition:background var(--bt-transition),color var(--bt-transition);-webkit-user-select:none;user-select:none}.bt-topbar__btn:hover{background:#ffffff14;color:#fff}.bt-topbar__btn .lead{display:flex;color:var(--bt-green)}.bt-topbar__btn .chev{display:flex;transition:transform var(--bt-transition-slow)}.bt-dd.is-open .chev{transform:rotate(180deg)}.bt-dd{position:relative}.bt-dd__panel{position:absolute;top:calc(100% + 8px);right:0;background:#fff;border:1px solid rgba(120,110,95,.16);border-radius:var(--bt-radius-md);box-shadow:var(--bt-shadow-pop);padding:6px;min-width:184px;z-index:5;font-family:var(--bt-font-sans);animation:bt-pop .16s ease both}.bt-dd__item{display:flex;align-items:center;gap:10px;padding:9px 11px;border-radius:9px;cursor:pointer;color:var(--bt-ink);transition:background var(--bt-transition-fast)}.bt-dd__item:hover{background:#cd2a1412}.bt-dd__item .lbl{flex:1;font-size:13.5px}.bt-dd__item .sym{width:18px;text-align:center;color:var(--bt-primary);font-weight:700;font-family:var(--bt-font-mono)}.bt-dd__item .code{font-family:var(--bt-font-mono);font-size:11px;color:var(--bt-n-450)}.bt-dd__item .lead{display:flex;color:var(--bt-n-550)}.bt-dd__item .chk{display:flex;color:var(--bt-primary)}.bt-dd__item.is-active .lbl{font-weight:700}.bt-header{position:sticky;top:0;z-index:var(--bt-z-header);background:#fbf9f6b8;-webkit-backdrop-filter:blur(20px) saturate(160%);backdrop-filter:blur(20px) saturate(160%);border-bottom:1px solid var(--bt-hairline-2)}.bt-header__inner{max-width:var(--bt-container);margin:0 auto;padding:14px 24px;display:flex;align-items:center;gap:22px}.bt-header__burger{display:none;width:42px;height:42px;border:1px solid var(--bt-hairline-strong);border-radius:11px;align-items:center;justify-content:center;cursor:pointer;font-size:18px;background:#ffffff80;transition:background var(--bt-transition),border-color var(--bt-transition),transform var(--bt-transition-fast)}.bt-header__burger:hover{background:#fff;border-color:#cd2a1466}.bt-header__burger:active{transform:scale(.94)}.bt-header__logo{height:31px;flex:none}.bt-search-trigger{flex:1;display:flex;align-items:center;background:var(--bt-glass-bg-soft);border:1px solid rgba(120,110,95,.2);border-radius:var(--bt-radius-md);overflow:hidden;cursor:text;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);transition:border-color var(--bt-transition),box-shadow var(--bt-transition)}.bt-search-trigger:hover{border-color:#cd2a1473;box-shadow:0 8px 22px -14px #cd2a1480}.bt-search-trigger .ic{padding:12px 8px 12px 16px;display:flex;align-items:center;color:var(--bt-n-450);flex:none}.bt-search-trigger .ph{flex:1;padding:12px 16px;color:var(--bt-n-450);font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.bt-search-trigger .kbd{margin-right:11px;font-family:var(--bt-font-mono);font-size:11px;color:var(--bt-n-450);border:1px solid var(--bt-hairline-strong);border-radius:6px;padding:3px 7px}.bt-header__acts{display:flex;align-items:center;gap:18px;font-size:11.5px;font-weight:500;color:var(--bt-n-800);flex:none}.bt-header__msearch{display:none;width:42px;height:42px;align-items:center;justify-content:center;border:1px solid var(--bt-hairline-strong);border-radius:11px;background:#ffffff80;color:var(--bt-n-800);cursor:pointer;transition:background var(--bt-transition),color var(--bt-transition)}.bt-header__msearch:hover{background:#fff;color:var(--bt-primary)}.bt-act{display:flex;flex-direction:column;align-items:center;gap:3px;cursor:pointer;color:inherit;text-decoration:none;transition:color var(--bt-transition),transform var(--bt-transition-fast)}.bt-act:hover{color:var(--bt-primary)}.bt-act:active{transform:scale(.92)}.bt-navbar{position:relative}.bt-nav__wrap{overflow:visible}.bt-nav__wrap--collapsible{overflow:hidden;max-height:64px;opacity:1;transform:none;transition:max-height .28s ease,opacity .2s ease,transform .28s ease}.bt-nav__wrap--collapsible.is-hidden{max-height:0;opacity:0;transform:translateY(-8px)}.bt-nav{max-width:var(--bt-container);margin:0 auto;padding:0 24px;display:flex;gap:4px;align-items:center;font-size:14px;font-weight:600}.bt-nav__item{padding:13px 16px;border-radius:10px 10px 0 0;display:flex;align-items:center;gap:8px;cursor:pointer;color:var(--bt-n-800);text-decoration:none;transition:background var(--bt-transition),color var(--bt-transition)}.bt-nav__item:hover{background:#cd2a140f;color:var(--bt-primary)}.bt-nav__item--accent{color:var(--bt-primary)}.bt-nav__item--accent:hover{background:#cd2a1414}.bt-nav__burger{width:18px;display:inline-flex;flex-direction:column;gap:3px}.bt-nav__burger span{height:2px;background:var(--bt-primary);border-radius:2px}.bt-nav__compat{margin-left:auto;padding:13px 16px;color:var(--bt-green-dark);display:flex;align-items:center;gap:7px}.bt-nav__compat .dot{width:8px;height:8px;border-radius:50%;background:var(--bt-green);display:inline-block}.bt-mega{position:absolute;left:0;right:0;top:100%;max-width:var(--bt-container);margin:0 auto;padding:0 24px;z-index:var(--bt-z-dropdown);opacity:0;visibility:hidden;transform:translateY(6px);transition:opacity var(--bt-transition),transform var(--bt-transition),visibility var(--bt-transition)}.bt-mega.is-open{opacity:1;visibility:visible;transform:none}.bt-mega__inner{background:#fcfbf9f9;-webkit-backdrop-filter:var(--bt-glass-blur-xl);backdrop-filter:var(--bt-glass-blur-xl);border:1px solid rgba(255,255,255,.7);border-radius:0 0 18px 18px;box-shadow:var(--bt-shadow-mega);overflow:hidden}.bt-mega--cat .bt-mega__inner{display:grid;grid-template-columns:264px 1fr 280px}.bt-mega__cats{padding:12px;border-right:1px solid var(--bt-hairline)}.bt-mega__cat-row{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:11px;cursor:pointer;color:var(--bt-ink);text-decoration:none;transition:background var(--bt-transition-fast)}.bt-mega__cat-row:hover,.bt-mega__cat-row.is-active{background:#cd2a1414}.bt-mega__cat-ic{width:34px;height:34px;border-radius:9px;background:var(--bt-n-50);display:flex;align-items:center;justify-content:center;color:var(--bt-primary);flex:none}.bt-mega__cat-name{font-size:13.5px;font-weight:600;flex:1}.bt-mega__cat-chev{color:var(--bt-n-300)}.bt-mega__detail{padding:22px 26px}.bt-mega__detail-head{display:flex;align-items:center;gap:10px;margin-bottom:16px}.bt-mega__detail-title{font-size:16px;font-weight:700}.bt-mega__subs{display:grid;grid-template-columns:1fr 1fr 1fr;gap:6px 18px}.bt-mega__sub{font-size:13.5px;color:var(--bt-n-700);padding:7px 0;cursor:pointer;text-decoration:none;transition:color var(--bt-transition),transform var(--bt-transition)}.bt-mega__sub:hover{color:var(--bt-primary);transform:translate(3px)}.bt-mega__all{margin-top:18px;padding-top:16px;border-top:1px solid 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