*,:after,:before{box-sizing:border-box}[data-theme=dark] .r4-only-light,[data-theme=light] .r4-only-dark{display:none!important}.r4-ic{width:20px;height:20px;flex:none}.r4-ic-sm{width:16px;height:16px}.r4-ic-xs{width:14px;height:14px}.r4-sky{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}.r4-sky:before{content:"";position:absolute;inset:-20%;background:radial-gradient(900px 640px at 6% -8%,var(--aurora-a),transparent 62%),radial-gradient(820px 620px at 104% 6%,var(--aurora-c),transparent 60%),radial-gradient(760px 560px at 84% 104%,var(--aurora-b),transparent 60%);animation:aurora 26s var(--ease) infinite alternate}.r4-sky:after{content:"";position:absolute;inset:0;background-image:radial-gradient(var(--star) 1px,transparent 1.3px);background-size:30px 30px;opacity:.5;-webkit-mask-image:linear-gradient(180deg,#000,rgba(0,0,0,.6) 45%,transparent);mask-image:linear-gradient(180deg,#000,rgba(0,0,0,.6) 45%,transparent)}.r4-grain{position:fixed;inset:0;z-index:0;pointer-events:none;opacity:var(--noise-opacity);background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='160' height='160' filter='url(%23n)' opacity='.9'/></svg>")}@keyframes aurora{0%{transform:translateZ(0) scale(1)}to{transform:translate3d(-3%,2%,0) scale(1.06)}}.r4-shell{position:relative;z-index:1;min-height:100vh;display:grid;grid-template-columns:var(--side-w) minmax(0,1fr);grid-template-rows:var(--topbar-h) 1fr;grid-template-areas:"top top" "side main"}.r4-topbar{grid-area:top;position:sticky;top:0;z-index:30;gap:16px;padding:0 20px;background:var(--topbar-bg);-webkit-backdrop-filter:blur(20px) saturate(1.4);backdrop-filter:blur(20px) saturate(1.4);border-bottom:1px solid var(--line)}.r4-brand,.r4-topbar{display:flex;align-items:center}.r4-brand{gap:10px;text-decoration:none}.r4-brand-mark{width:34px;height:34px;object-fit:contain;filter:drop-shadow(0 2px 8px rgba(240,128,48,.35))}.r4-brand-text{display:flex;flex-direction:column;line-height:1.1}.r4-brand-text b{font-size:17px;font-weight:700;letter-spacing:-.01em}.r4-brand-text small{font-size:11px;color:var(--ink-3);margin-top:3px}.r4-ctx{display:flex;gap:6px;margin-left:8px}.r4-ctx-pill{display:inline-flex;align-items:center;gap:6px;padding:7px 10px 7px 12px;border-radius:var(--r-pill);background:var(--input-bg);border:1px solid var(--line);color:var(--ink-2);font-size:var(--fs-sm);font-weight:500;white-space:nowrap;transition:all var(--dur-1) var(--ease)}.r4-ctx-pill:hover{border-color:var(--line-hi);color:var(--ink)}.r4-ctx-pill .r4-ic{color:var(--ink-3)}.r4-spacer{flex:1 1}.r4-top-actions{display:flex;align-items:center;gap:8px}.r4-icon-btn{position:relative;width:38px;height:38px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;background:var(--input-bg);border:1px solid var(--line);color:var(--ink-2);transition:all var(--dur-1) var(--ease)}.r4-icon-btn:hover{color:var(--ink);border-color:var(--line-hi);transform:translateY(-1px)}.r4-badge{position:absolute;top:-5px;right:-5px;min-width:18px;height:18px;padding:0 5px;border-radius:9px;background:var(--brand);color:var(--ink-on-brand);font-size:11px;font-weight:700;display:grid;place-items:center;box-shadow:0 0 0 2px var(--bg-0)}.r4-user-chip{display:flex;align-items:center;gap:9px;padding:4px 10px 4px 4px;border-radius:var(--r-pill);border:1px solid var(--line);background:var(--input-bg)}.r4-avatar{width:30px;height:30px;border-radius:10px;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand-grad-a),var(--brand-grad-b));color:var(--ink-on-brand);font-weight:700;font-size:14px}.r4-user-name{font-size:var(--fs-sm);font-weight:500}.r4-user-role{font-size:11.5px;color:var(--ink-3);padding-left:8px;border-left:1px solid var(--line-hi)}.r4-sidebar{grid-area:side;position:sticky;top:var(--topbar-h);height:calc(100vh - var(--topbar-h));padding:18px 14px;border-right:1px solid var(--line);background:linear-gradient(180deg,var(--surface-hi),transparent 40%)}.r4-nav-group,.r4-sidebar{display:flex;flex-direction:column}.r4-nav-group{gap:2px;margin-bottom:10px}.r4-nav-title{font-size:11.5px;font-weight:500;letter-spacing:.05em;color:var(--ink-3);padding:10px 12px 6px}.r4-nav-item{position:relative;display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:12px;text-decoration:none;color:var(--ink-2);font-weight:500;font-size:14.5px;transition:background var(--dur-1) var(--ease),color var(--dur-1) var(--ease),transform var(--dur-1) var(--ease)}.r4-nav-item:hover{background:var(--surface-hover);color:var(--ink);transform:translateX(2px)}.r4-nav-item.r4-active{color:var(--ink);background:linear-gradient(90deg,var(--brand-soft),transparent 85%)}.r4-nav-item.r4-active:before{content:"";position:absolute;left:-14px;top:9px;bottom:9px;width:3px;border-radius:3px;background:var(--brand-hi);box-shadow:0 0 12px var(--brand-hi)}.r4-nav-item.r4-active .r4-nav-icon{color:var(--brand-hi)}.r4-nav-icon{width:20px;height:20px;flex:none}.r4-side-spacer{flex:1 1}.r4-side-card{padding:14px;border-radius:var(--r-md);border:1px solid var(--line);background:var(--surface);position:relative;overflow:hidden}.r4-side-card:after{content:"";position:absolute;right:-30px;top:-30px;width:110px;height:110px;border-radius:50%;background:var(--brand-soft);filter:blur(24px)}.r4-side-card .r4-eyebrow{font-size:11.5px;color:var(--ink-3);margin-bottom:4px}.r4-side-card .r4-title{font-weight:700;font-size:14.5px}.r4-side-card .r4-meta{font-size:var(--fs-sm);color:var(--ink-2);margin:2px 0 10px}.r4-main{grid-area:main;min-width:0;padding:28px 32px 120px}.r4-content{max-width:var(--content-max);margin:0 auto;display:flex;flex-direction:column;gap:22px}.r4-phone-nav{display:none;position:fixed;left:0;right:0;bottom:0;z-index:30;padding:8px 8px calc(8px + env(safe-area-inset-bottom));background:var(--topbar-bg);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-top:1px solid var(--line)}.r4-phone-item{flex:1 1;display:flex;flex-direction:column;align-items:center;gap:4px;padding:6px 2px;border-radius:12px;text-decoration:none;color:var(--ink-3);font-size:11px;font-weight:500}.r4-phone-item .r4-ic{width:22px;height:22px}.r4-phone-item.r4-active{color:var(--brand-hi);background:var(--brand-soft)}.r4-orb{position:fixed;right:24px;bottom:24px;z-index:40;width:62px;height:62px;border-radius:50%;border:0;padding:0;background:transparent;display:grid;place-items:center;filter:drop-shadow(0 8px 24px rgba(34,211,238,.28))}.r4-orb-ring{inset:0;background:conic-gradient(from 0deg,var(--live),var(--brand-hi),var(--live));animation:spin 6s linear infinite}.r4-orb-ring,.r4-orb-ring:after{position:absolute;border-radius:50%}.r4-orb-ring:after{content:"";inset:3px;background:var(--bg-1)}.r4-orb-core{position:relative;width:44px;height:44px;border-radius:50%;display:grid;place-items:center;background:radial-gradient(circle at 35% 30%,var(--surface-2),var(--bg-1));color:var(--live);animation:breathe 3.4s var(--ease) infinite}.r4-orb-core .r4-ic{width:22px;height:22px}.r4-orb:hover .r4-orb-core{transform:scale(1.06)}.r4-orb.r4-state-listening .r4-orb-ring{animation-duration:1.6s}.r4-orb.r4-state-listening{filter:drop-shadow(0 8px 30px rgba(34,211,238,.55))}@keyframes spin{to{transform:rotate(1turn)}}@keyframes breathe{0%,to{box-shadow:0 0 0 0 rgba(34,211,238,0)}50%{box-shadow:0 0 0 6px rgba(34,211,238,.12)}}.r4-card{position:relative;border-radius:var(--r-lg);background:var(--surface);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);border:1px solid var(--line);box-shadow:var(--shadow-1),inset 0 1px 0 var(--surface-hi);padding:22px 24px;transition:transform var(--dur-2) var(--ease),box-shadow var(--dur-2) var(--ease),border-color var(--dur-2) var(--ease)}.r4-card:before{content:"";position:absolute;inset:-1px;border-radius:inherit;padding:1px;pointer-events:none;background:linear-gradient(135deg,var(--line-hi),transparent 45%,transparent 70%,var(--line));-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude}.r4-card.r4-lift:hover{transform:translateY(-3px);box-shadow:var(--shadow-2),inset 0 1px 0 var(--surface-hi)}.r4-card.r4-tight{padding:16px 18px}.r4-card.r4-flush{padding:0;overflow:hidden}.r4-card.r4-accent{border-color:var(--brand-line)}.r4-card.r4-accent:after{content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;background:radial-gradient(420px 220px at 100% 0,var(--brand-soft),transparent 70%)}.r4-card>*{position:relative;z-index:1}.r4-card-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}.r4-card-head h2{font-size:var(--fs-lg);font-weight:700;letter-spacing:-.01em}.r4-card-head .r4-link{color:var(--brand);text-decoration:none;display:inline-flex;align-items:center;gap:4px}.r4-card-head .r4-link,.r4-eyebrow{font-size:var(--fs-sm);font-weight:500}.r4-eyebrow{color:var(--ink-3)}.r4-h1{font-size:var(--fs-3xl);line-height:1.15;letter-spacing:-.02em}.r4-h1,.r4-h2{font-weight:700}.r4-h2{font-size:var(--fs-xl);letter-spacing:-.01em}.r4-sub{color:var(--ink-2)}.r4-muted{color:var(--ink-3);font-size:var(--fs-sm)}.r4-grad-text{background:linear-gradient(120deg,var(--brand-hi),var(--brand) 60%);-webkit-background-clip:text;background-clip:text;color:transparent}.r4-serif{font-family:var(--font-display)}.r4-num{font-size:var(--fs-num);font-weight:700;line-height:1;letter-spacing:-.02em;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.r4-page-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;flex-wrap:wrap}.r4-page-head .r4-h1{font-size:var(--fs-2xl)}.r4-page-head .r4-actions{display:flex;gap:10px;flex-wrap:wrap}.r4-crumbs{display:flex;gap:6px;align-items:center;font-size:var(--fs-sm);color:var(--ink-3);margin-bottom:8px}.r4-crumbs .r4-ic{width:14px;height:14px}.r4-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 18px;border-radius:12px;border:1px solid transparent;font-weight:600;font-size:14.5px;line-height:1.2;text-decoration:none;white-space:nowrap;transition:transform var(--dur-1) var(--ease),box-shadow var(--dur-2) var(--ease),background var(--dur-1) var(--ease),border-color var(--dur-1) var(--ease),filter var(--dur-1) var(--ease)}.r4-btn:active{transform:translateY(1px) scale(.99)}.r4-btn .r4-ic{width:18px;height:18px}.r4-btn-primary{background:linear-gradient(135deg,var(--brand-grad-a),var(--brand-grad-b));color:var(--ink-on-brand);box-shadow:var(--brand-glow),inset 0 1px 0 rgba(255,255,255,.25)}.r4-btn-primary:hover{filter:brightness(1.06);transform:translateY(-1px)}.r4-btn-secondary{background:var(--surface-2);border-color:var(--line-hi);color:var(--ink)}.r4-btn-secondary:hover{border-color:var(--brand-line);transform:translateY(-1px)}.r4-btn-ghost{background:transparent;border-color:var(--line);color:var(--ink-2)}.r4-btn-ghost:hover{color:var(--ink);border-color:var(--line-hi)}.r4-btn-live{background:var(--live-soft);border-color:var(--live-line);color:var(--live)}.r4-btn-lg{padding:15px 26px;font-size:16px;border-radius:14px}.r4-btn-sm{padding:8px 12px;font-size:13.5px;border-radius:10px}.r4-btn-block{width:100%}.r4-btn-round{width:56px;height:56px;padding:0;border-radius:50%}.r4-btn-round .r4-ic{width:24px;height:24px}.r4-chip{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:var(--r-pill);font-size:12.5px;font-weight:600;border:1px solid transparent;white-space:nowrap}.r4-chip:before{content:"";width:6px;height:6px;border-radius:50%;background:currentColor}.r4-chip.r4-ok{color:var(--ok);background:var(--ok-soft)}.r4-chip.r4-warn{color:var(--warn);background:var(--warn-soft)}.r4-chip.r4-bad{color:var(--bad);background:var(--bad-soft)}.r4-chip.r4-info{color:var(--info);background:var(--info-soft)}.r4-chip.r4-live{color:var(--live);background:var(--live-soft)}.r4-chip.r4-brand{color:var(--brand);background:var(--brand-soft)}.r4-chip.r4-neutral{color:var(--ink-2);background:var(--input-bg);border-color:var(--line)}.r4-chip.r4-neutral:before{display:none}.r4-tag{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:8px;font-size:12.5px;font-weight:500;color:var(--brand);background:var(--brand-soft);border:1px solid var(--brand-line)}.r4-tag .r4-ic{width:13px;height:13px}.r4-chips{display:flex;gap:8px;flex-wrap:wrap}.r4-filter-chip{padding:8px 14px;border-radius:var(--r-pill);border:1px solid var(--line);background:var(--input-bg);color:var(--ink-2);font-size:var(--fs-sm);font-weight:500}.r4-filter-chip.r4-active{color:var(--brand);border-color:var(--brand-line);background:var(--brand-soft)}.r4-field{position:relative;display:flex;align-items:center;gap:8px;padding:0 12px;height:42px;border-radius:12px;background:var(--input-bg);border:1px solid var(--line);color:var(--ink-3);min-width:260px}.r4-field input{flex:1 1;border:0;background:transparent;color:var(--ink);font:inherit;outline:0;min-width:0}.r4-field input::placeholder{color:var(--ink-3)}.r4-field .r4-ic{width:18px;height:18px}.r4-field:focus-within{border-color:var(--brand-line);box-shadow:0 0 0 3px var(--brand-soft)}.r4-hero{display:grid;grid-template-columns:1.35fr 1fr;gap:24px;align-items:stretch}.r4-hero-text{display:flex;flex-direction:column;justify-content:center;gap:12px;padding:8px 4px}.r4-hero-text .r4-h1{max-width:14ch}.r4-hero-facts{display:flex;gap:18px;flex-wrap:wrap;margin-top:6px}.r4-hero-fact{display:flex;align-items:center;gap:8px;color:var(--ink-2);font-size:var(--fs-sm)}.r4-hero-fact .r4-ic{width:16px;height:16px;color:var(--brand-hi)}.r4-lesson-card .r4-when{display:flex;align-items:center;gap:8px;font-size:var(--fs-sm);color:var(--live);font-weight:600}.r4-lesson-card .r4-when .r4-ic{width:16px;height:16px}.r4-lesson-card .r4-title{font-size:var(--fs-xl);font-weight:700;margin:10px 0 6px;letter-spacing:-.01em;line-height:1.25}.r4-lesson-card .r4-meta{color:var(--ink-2);font-size:var(--fs-sm);margin-bottom:16px;align-items:center}.r4-lesson-card .r4-cta,.r4-lesson-card .r4-meta{display:flex;gap:10px;flex-wrap:wrap}.r4-stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.r4-stat{display:flex;gap:16px;align-items:center}.r4-stat-icon{width:46px;height:46px;border-radius:14px;display:grid;place-items:center;flex:none;background:var(--brand-soft);color:var(--brand-hi);border:1px solid var(--brand-line)}.r4-stat-icon.r4-live{background:var(--live-soft);color:var(--live);border-color:var(--live-line)}.r4-stat-icon.r4-ok{background:var(--ok-soft);color:var(--ok);border-color:transparent}.r4-stat-icon .r4-ic{width:22px;height:22px}.r4-stat-body{flex:1 1;min-width:0}.r4-stat-body .r4-label{font-size:var(--fs-sm);color:var(--ink-2);margin-top:4px}.r4-stat-body .r4-delta{font-size:12.5px;color:var(--ink-3);margin-top:2px}.r4-spark{width:84px;height:36px;flex:none}.r4-spark rect{fill:var(--brand-line)}.r4-spark rect.r4-hi{fill:var(--brand-hi)}.r4-spark.r4-live rect{fill:var(--live-line)}.r4-spark.r4-live rect.r4-hi{fill:var(--live)}.r4-two{grid-template-columns:1.2fr 1fr}.r4-grid-2,.r4-two{display:grid;gap:20px}.r4-grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.r4-list{display:flex;flex-direction:column}.r4-row{display:flex;align-items:center;gap:14px;padding:13px 8px;margin:0 -8px;border-radius:12px;border-top:1px solid var(--line);text-decoration:none;color:inherit;transition:background var(--dur-1) var(--ease)}.r4-row:first-child{border-top:0}.r4-row:hover{background:var(--surface-hover)}.r4-row .r4-lead{flex:none}.r4-row .r4-body{flex:1 1;min-width:0}.r4-row .r4-body .r4-t{display:block;font-weight:600;font-size:14.5px}.r4-row .r4-body .r4-s{display:block;font-size:var(--fs-sm);color:var(--ink-2);margin-top:2px}.r4-row .r4-trail{display:flex;align-items:center;gap:12px;color:var(--ink-3);font-size:var(--fs-sm);white-space:nowrap}.r4-row .r4-trail .r4-ic{width:18px;height:18px}.r4-letter{width:42px;height:42px;border-radius:13px;display:grid;place-items:center;font-weight:700;font-size:18px;color:var(--brand-hi);background:var(--brand-soft);border:1px solid var(--brand-line)}.r4-letter.r4-live{color:var(--live);background:var(--live-soft);border-color:var(--live-line)}.r4-letter.r4-ok{color:var(--ok);background:var(--ok-soft);border-color:transparent}.r4-letter.r4-warn{color:var(--warn);background:var(--warn-soft);border-color:transparent}.r4-letter.r4-n{font-size:15px}.r4-table-wrap{overflow-x:auto}table.r4-table{width:100%;border-collapse:collapse;font-size:14.5px}.r4-table th{text-align:left;font-weight:500;font-size:12.5px;color:var(--ink-3);padding:14px 16px;white-space:nowrap}.r4-table td,.r4-table th{border-bottom:1px solid var(--line)}.r4-table td{padding:13px 16px;vertical-align:middle}.r4-table tr:last-child td{border-bottom:0}.r4-table tbody tr{transition:background var(--dur-1) var(--ease)}.r4-table tbody 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