:root{--bg:#f7f9fc;--paper:#fff;--ink:#071426;--muted:#5d6b7e;--line:#dce3ec;--blue:#155eef;--cyan:#4de2ed;--navy:#071b38;--soft:#eef4ff;--max:1180px;--r:22px;--shadow:0 1px 2px rgba(15,35,70,0.04),0 20px 60px rgba(15,35,70,0.08);--shadow-hover:0 2px 4px rgba(15,35,70,0.05),0 24px 64px rgba(21,94,239,0.13);--line-strong:#c5d4ea;--ease:cubic-bezier(0.2,0.7,0.3,1)}*{box-sizing:border-box}html{scroll-behavior:smooth;scrollbar-width:thin;scrollbar-color:#c3cede transparent}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.65 Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility}@media (max-width:820px){body.nav-open{overflow:hidden}}a{color:inherit;text-decoration:none}:where(a,button,input,select,textarea,[tabindex]):focus-visible{outline:3px solid var(--blue);outline-offset:3px}.skip-link{position:fixed;top:10px;left:10px;z-index:1000;padding:10px 14px;border-radius:8px;color:#fff;background:var(--navy);transform:translateY(-160%)}.skip-link:focus{transform:translateY(0)}main[id=main-content]{scroll-margin-top:88px}::selection{background:rgba(21,94,239,.16)}section[id]{scroll-margin-top:88px}.formula,.meta b,.num,.version-tag{font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.wrap{width:min(var(--max),calc(100% - 40px));margin:auto}.rank-overview{padding-top:56px;padding-bottom:80px}.rank-overview>.sub{max-width:820px}.rank-overview section{margin-top:36px}.rank-overview section h2{margin-bottom:10px}.rank-levels{margin:0;border-top:1px solid var(--line)}.rank-levels>div{display:grid;grid-template-columns:minmax(110px,180px) 1fr;grid-gap:16px;gap:16px;padding:14px 0;border-bottom:1px solid var(--line)}.rank-levels dt{font-weight:750}.rank-levels dd{margin:0}.developer-levels{list-style:none;padding:0;margin:32px 0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:18px;gap:18px}.developer-levels li{border:1px solid var(--line);border-radius:12px;padding:20px;background:var(--paper)}.developer-levels h2{font-size:1.1rem;margin:0 0 10px}.developer-levels p{margin:0}.rank-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}.rank-form{display:grid;grid-gap:10px;gap:10px;max-width:420px;margin:28px 0}.rank-form input{padding:10px 12px;border:1px solid var(--line-strong);border-radius:10px;font:inherit}.rank-summary{display:grid;grid-gap:6px;gap:6px}.rank-ranking-list{list-style:none;padding:0;margin:24px 0;border-top:1px solid var(--line)}.rank-ranking-list li{display:flex;justify-content:space-between;gap:16px;padding:12px 0;border-bottom:1px solid var(--line)}.rank-badge{min-height:100vh;margin:0;padding:16px;font:14px/1.5 Inter,ui-sans-serif,sans-serif;background:var(--paper);color:var(--ink)}.rank-badge p{margin:0 0 8px;font-weight:700}.rank-badge-page{min-height:100vh;margin:0;padding:48px 20px 72px;background:radial-gradient(900px 420px at 12% -10%,rgba(77,226,237,.14),transparent 60%),linear-gradient(180deg,#eef3f9 0,var(--bg) 42%,#fff 100%);color:var(--ink)}.rank-badge-shell{max-width:560px;margin:0 auto;padding:28px 28px 32px;border:1px solid var(--line);border-radius:18px;background:rgba(255,255,255,.92);box-shadow:var(--shadow)}.rank-badge-eyebrow{margin:0 0 8px;color:#2b5fb8;font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase}.rank-badge-heading{margin:0;font-size:34px;line-height:1.15;letter-spacing:-.03em}.rank-badge-status{display:inline-block;margin:14px 0 0;padding:4px 10px;border-radius:6px;color:#fff;font-size:12px;font-weight:700;background:#5d6b7e}.rank-badge-status[data-tone=ok]{background:var(--blue)}.rank-badge-status[data-tone=watch]{background:#b45309}.rank-badge-status[data-tone=blocked]{background:#b42318}.rank-badge-scope{margin:12px 0 0;color:var(--muted);font-size:14px}.rank-badge-preview{margin-top:22px;padding:22px;border-radius:14px;border:1px dashed var(--line-strong);background:linear-gradient(135deg,rgba(7,27,56,.04),transparent 48%),#f7fafc;display:grid;place-items:center}.rank-badge-img{display:block;width:320px;max-width:100%;height:auto;border-radius:8px;box-shadow:0 10px 28px rgba(7,20,38,.12)}.rank-badge-actions{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0 0}.rank-badge-embed{margin-top:28px;padding-top:22px;border-top:1px solid var(--line)}.rank-badge-embed h2{margin:0 0 8px;font-size:18px}.rank-badge-embed p{margin:0 0 14px;color:var(--muted);font-size:14px}.rank-badge-code-label{display:grid;grid-gap:6px;gap:6px;margin-bottom:12px;color:#334155;font-size:12px;font-weight:700}.rank-badge-code{width:100%;resize:vertical;border:1px solid var(--line);border-radius:10px;padding:10px 12px;background:#f8fafc;color:var(--ink);font:12px/1.45 ui-monospace,SFMono-Regular,Menlo,monospace}@media (max-width:680px){.rank-levels>div{gap:3px}.developer-levels,.rank-levels>div{grid-template-columns:1fr}}.site-header{position:-webkit-sticky;position:sticky;top:0;z-index:20;background:rgba(247,249,252,.86);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);transition:box-shadow .25s ease,background .25s ease}.site-header.is-scrolled{box-shadow:0 10px 30px rgba(15,35,70,.07),0 1px 0 rgba(21,60,130,.05);background:rgba(255,255,255,.92)}.nav{height:72px;justify-content:space-between}.brand,.nav{display:flex;align-items:center}.brand img{width:132px}.brand img,.hero-logo{display:block;height:auto}.hero-logo{width:min(520px,82vw);margin:26px 0 28px;filter:drop-shadow(0 14px 34px rgba(21,94,239,.12))}.hero h1{margin-top:0!important}.links{display:flex;gap:28px;color:#45556b;font-size:14px}.links a,.mobile-nav a{position:relative;transition:color .2s var(--ease)}.links a:hover,.mobile-nav a:hover{color:var(--navy)}.lang{position:relative}.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;padding:0;border:1px solid var(--line);border-radius:12px;background:#fff;color:#4a5a72;transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease),background .2s var(--ease)}.icon-btn:hover{color:var(--navy);border-color:#b9cbe8;background:#fbfdff;transform:translateY(-1px);box-shadow:0 6px 16px rgba(15,35,70,.1)}.icon-btn:active{transform:translateY(0);box-shadow:0 2px 6px rgba(15,35,70,.08);transition-duration:.06s}.icon-btn[aria-expanded=true]{color:var(--navy);border-color:#b9cbe8;background:#fbfdff}.lang-menu{position:absolute;right:0;top:calc(100% + 8px);z-index:30;min-width:152px;padding:6px;border:1px solid var(--line);border-radius:14px;background:#fff;box-shadow:0 2px 6px rgba(15,35,70,.06),0 20px 44px rgba(15,35,70,.14);animation:menu-in .18s var(--ease)}.lang-menu a{display:flex;align-items:center;justify-content:space-between;padding:8px 10px;border-radius:9px;color:#3d4c63;font-size:13px;font-weight:600;transition:color .18s var(--ease),background .18s var(--ease)}.lang-menu a:hover{background:var(--soft);color:var(--navy)}.lang-menu a[aria-current=true]{color:var(--blue)}@keyframes menu-in{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}.btn:focus-visible,.doc:focus-visible,.icon-btn:focus-visible,.lang-menu a:focus-visible,.links a:focus-visible,.nav-toggle:focus-visible{outline:2px solid var(--blue);outline-offset:3px}.lang-zh,html.lang-zh body{font-family:Inter,PingFang SC,Noto Sans CJK SC,Microsoft YaHei,ui-sans-serif,sans-serif}html.lang-zh .hero h1{letter-spacing:-.04em;font-size:clamp(46px,6vw,80px);line-height:1.18}html.lang-zh .section h2{letter-spacing:-.025em;line-height:1.25}html.lang-zh .formula{line-height:1.6}html.lang-zh .eyebrow,html.lang-zh .meta small{letter-spacing:.03em}.actions{display:flex;gap:8px}.actions,.btn{align-items:center}.btn{display:inline-flex;justify-content:center;padding:10px 15px;border:1px solid var(--line);border-radius:12px;background:#fff;font-weight:650;transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease)}.btn:has(svg){gap:8px}.btn svg{display:block;flex-shrink:0}.btn:hover{transform:translateY(-1px);box-shadow:0 6px 16px rgba(15,35,70,.1)}.btn:active{transform:translateY(0);box-shadow:0 2px 6px rgba(15,35,70,.08);transition-duration:.06s}.btn:not(.primary):hover{border-color:#b9cbe8;background:#fbfdff}.btn.primary{background:linear-gradient(180deg,#0c2650 0,var(--navy) 55%,#0a2148 100%);color:#fff;border-color:var(--navy);box-shadow:inset 0 1px 0 rgba(255,255,255,.14),0 1px 2px rgba(7,27,56,.18)}.btn:disabled{opacity:.6;cursor:not-allowed;transform:none;box-shadow:none}.btn.primary:hover{background:linear-gradient(180deg,#12306a,#0a2450 55%,#0a2148);box-shadow:inset 0 1px 0 rgba(255,255,255,.16),0 8px 20px rgba(10,33,90,.26)}.nav-toggle{display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:12px;background:#fff;position:relative;transition:border-color .2s var(--ease),box-shadow .2s var(--ease)}.nav-toggle:hover{border-color:#b9cbe8;box-shadow:0 6px 16px rgba(15,35,70,.1)}.nav-toggle i{position:absolute;left:11px;right:11px;height:1.5px;background:var(--navy);transition:transform .2s var(--ease),top .2s var(--ease)}.nav-toggle i:first-of-type{top:15px}.nav-toggle i:last-of-type{top:23px}.nav-toggle.is-open i:first-of-type{top:19px;transform:rotate(45deg)}.nav-toggle.is-open i:last-of-type{top:19px;transform:rotate(-45deg)}.mobile-nav{display:none;flex-direction:column;gap:18px;padding:8px 20px 28px;border-bottom:1px solid var(--line);background:#fff}.hero{position:relative;padding:90px 0 74px;border-top:1px solid rgba(0,0,0,.03);overflow:hidden}.hero:before{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(52% 46% at 16% 6%,rgba(21,94,239,.1),transparent 68%),radial-gradient(40% 36% at 84% 0,rgba(109,92,255,.08),transparent 66%),linear-gradient(rgba(21,60,130,.05) 1px,transparent 0),linear-gradient(90deg,rgba(21,60,130,.05) 1px,transparent 0);background-size:100% 100%,100% 100%,44px 44px,44px 44px;-webkit-mask-image:radial-gradient(82% 78% at 50% 10%,#000 0,transparent 100%);mask-image:radial-gradient(82% 78% at 50% 10%,#000 0,transparent 100%)}.eyebrow{display:inline-flex;gap:8px;align-items:center;border:1px solid #cfdcf2;background:#f3f7ff;padding:6px 10px;border-radius:999px;color:#2b5fb8;font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase}.eyebrow:before{content:"";width:6px;height:6px;border-radius:50%;flex-shrink:0;background:var(--blue);animation:pulse-dot 3s ease-out infinite}@keyframes pulse-dot{0%{box-shadow:0 0 0 0 rgba(21,94,239,.3)}70%{box-shadow:0 0 0 6px rgba(21,94,239,0)}to{box-shadow:0 0 0 0 rgba(21,94,239,0)}}.hero h1{font-size:clamp(54px,8vw,104px);line-height:.92;letter-spacing:-.065em;margin:24px 0 26px;max-width:950px}.grad{color:#114bd8;background:linear-gradient(100deg,#114bd8 8%,#4a3df0 38%,#21b5ec 72%,#61e4e6 96%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}@supports not ((-webkit-background-clip:text) or (background-clip:text)){.grad{background:none;color:var(--blue);-webkit-text-fill-color:currentColor}}.lead{max-width:790px;color:#2a3648;font-size:20px;line-height:1.6}.hero-support{margin-top:12px;max-width:720px;color:#334155;font-size:17px;line-height:1.65}.hero-note{margin-top:10px;color:#3d4b5f;font-style:italic}.hero-aside,.hero-note{max-width:720px;font-size:16px;line-height:1.65}.hero-aside{margin-top:12px;color:#445468}.hero-cta{display:flex;gap:12px;margin-top:34px;flex-wrap:wrap}.meta{margin-top:60px;display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.meta div{padding:22px 0}.meta small{display:block;color:#5a687a;text-transform:uppercase;letter-spacing:.12em;font-size:10px}.meta b{font-size:14px;color:var(--ink)}@media (prefers-reduced-motion:no-preference){.hero .eyebrow,.hero .hero-aside,.hero .hero-cta,.hero .hero-logo,.hero .hero-note,.hero .hero-support,.hero .lead,.hero .meta,.hero h1{animation:rise-in .7s var(--ease) both}.hero .eyebrow{animation-delay:.05s}.hero .hero-logo{animation-delay:.12s}.hero h1{animation-delay:.2s}.hero .lead{animation-delay:.28s}.hero .hero-support{animation-delay:.32s}.hero .hero-note{animation-delay:.34s}.hero .hero-aside{animation-delay:.36s}.hero .hero-cta{animation-delay:.4s}.hero .meta{animation-delay:.48s}}@keyframes rise-in{0%{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}.section{padding:88px 0}.section h2{font-size:42px;letter-spacing:-.045em;line-height:1.05;margin:0 0 16px}.sub{color:var(--muted);max-width:720px;font-size:17px}.model{position:relative;margin-top:42px;color:#fff;border-radius:28px;padding:44px;box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.07);overflow:hidden;background:radial-gradient(44% 58% at 86% 8%,rgba(77,226,237,.13),transparent 70%),radial-gradient(46% 52% at 8% 96%,rgba(21,94,239,.2),transparent 72%),var(--navy)}.model:before{content:"";position:absolute;inset:0;pointer-events:none;background:linear-gradient(rgba(255,255,255,.03) 1px,transparent 0),linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 0);background-size:40px 40px;-webkit-mask-image:radial-gradient(85% 85% at 60% 42%,#000,transparent);mask-image:radial-gradient(85% 85% at 60% 42%,#000,transparent)}.model-top{display:flex;justify-content:space-between;gap:30px}.model h3{font-size:34px;margin:0;letter-spacing:-.04em}.formula{font:600 18px ui-monospace,SFMono-Regular,Menlo,monospace;color:#bfeaff;margin-top:18px;text-shadow:0 0 26px rgba(77,226,237,.35)}.flow{margin-top:42px;display:grid;grid-template-columns:repeat(3,1fr);grid-gap:12px;gap:12px}.flow .node{padding:20px;border:1px solid rgba(255,255,255,.15);border-radius:16px;background:rgba(255,255,255,.04);transition:transform .25s var(--ease),background .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease)}.flow .node:hover{transform:translateY(-3px);background:rgba(77,226,237,.08);border-color:rgba(77,226,237,.35);box-shadow:0 10px 26px rgba(2,12,30,.35)}.node b{display:block;font-size:17px}.node span{color:#aebed2;font-size:13px}.pillars{margin-top:38px;display:grid;grid-template-columns:repeat(2,1fr);grid-gap:14px;gap:14px}.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:26px;min-height:160px;transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease)}.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--line-strong)}.num{color:#2470ed;font:700 12px ui-monospace,monospace;letter-spacing:.06em;transition:color .25s var(--ease)}.card h3{margin:15px 0 8px;font-size:20px}.card p{margin:0;color:var(--muted)}.card:hover .num{color:#1a5ae0}.compare{margin-top:38px;border:1px solid var(--line);border-radius:22px;overflow:hidden;background:#fff}.row{display:grid;grid-template-columns:1.1fr repeat(3,1fr)}.row>div{padding:18px 20px;border-right:1px solid var(--line);border-top:1px solid var(--line)}.row>div:last-child{border-right:0}.row.head>div{border-top:0;background:linear-gradient(180deg,#f4f8fd,#edf3fa);font-weight:800}.row.head>div:last-child{color:var(--blue)}.row .label{color:#69778a}.compare .row:not(.head):hover>div{background:#f7faff}.integrity{display:grid;grid-template-columns:.95fr 1.05fr;grid-gap:56px;gap:56px;align-items:center}.cycle-board{display:grid;justify-items:center;grid-gap:28px;gap:28px}.cycle{--cycle-size:min(380px,82vw);width:var(--cycle-size);aspect-ratio:1;border-radius:50%;display:grid;place-items:center;position:relative}.cycle-ring{position:absolute;inset:0;width:100%;height:100%}.cycle-track{fill:none;stroke:#dde4ee;stroke-width:.7}.cycle-arc{fill:none;stroke:#1d4ed8;stroke-width:1.15;stroke-linecap:round;stroke-dasharray:72 418;transform-origin:100px 100px;transition:transform 1.05s cubic-bezier(.22,1,.36,1)}.cycle strong{position:relative;z-index:1;font-size:20px;font-weight:600;text-align:center;line-height:1.2;letter-spacing:-.03em;color:var(--navy)}.cycle-step{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%) rotate(var(--step-angle)) translateY(calc(var(--cycle-size) * -.445)) rotate(calc(var(--step-angle) * -1));display:grid;justify-items:center;grid-gap:8px;gap:8px;border:0;background:transparent;color:#5d6b7e;font:500 11px/1 Inter,ui-sans-serif,sans-serif;letter-spacing:.04em;cursor:pointer}.cycle-step i{width:6px;height:6px;border-radius:50%;background:#c5ced8;transition:background .45s ease,box-shadow .45s ease}.cycle-step.is-active{color:var(--navy)}.cycle-step.is-active i{background:#1d4ed8;box-shadow:0 0 0 3px rgba(29,78,216,.1);animation:pulse-dot 3s ease-out infinite}.cycle-step:focus-visible{outline:1px solid #1d4ed8;outline-offset:6px;border-radius:6px}.cycle-note{max-width:300px;margin:0;min-height:48px;color:var(--muted);text-align:center;font-size:14px;line-height:1.65;animation:note-in .45s var(--ease)}@keyframes note-in{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}.docs{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:14px;gap:14px;margin-top:34px}.doc{border:1px solid var(--line);background:#fff;border-radius:16px;padding:20px;transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease)}.doc:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:var(--line-strong)}.doc small{color:#5d6b7e;letter-spacing:.04em}.doc b{display:block;margin-top:5px;transition:transform .25s var(--ease)}.doc:hover b{transform:translateX(3px)}.origin{background:radial-gradient(rgba(21,94,239,.06) 1px,transparent 1.4px),radial-gradient(60% 90% at 100% 0,rgba(255,255,255,.6),transparent 62%),radial-gradient(42% 64% at 0 100%,rgba(21,94,239,.1),transparent 70%),linear-gradient(160deg,#f0f6ff,#e7f0ff);background-size:22px 22px,100% 100%,100% 100%,100% 100%;border:1px solid #c7daff;border-radius:28px;padding:44px;display:flex;justify-content:space-between;gap:50px;align-items:center;box-shadow:inset 0 1px 0 rgba(255,255,255,.8),var(--shadow)}.origin h2{max-width:680px}.origin-actions{display:flex;flex-wrap:wrap;gap:10px;justify-content:flex-end}.contact-lead{max-width:640px;margin:12px 0 0;font-size:17px;line-height:1.7;color:#243246}.contact-hint{max-width:640px;margin:8px 0 0;color:var(--muted)}.contact-grid{display:grid;grid-template-columns:1fr 1fr;grid-gap:14px;gap:14px;margin-top:28px}.contact-card{border:1px solid var(--line);background:#fff;border-radius:16px;padding:22px;box-shadow:var(--shadow)}.contact-card h2{font-size:20px;letter-spacing:-.03em;margin:0 0 8px}.contact-card p{margin:0;color:#243246}.contact-card .entity{margin-top:10px;color:#5d6b7e;font-size:13px}.contact-address{margin:16px 0 0;font:600 15px/1.5 ui-monospace,SFMono-Regular,Menlo,monospace;word-break:break-all}.contact-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}.contact-actions .btn{text-decoration:none}.contact-error{margin-top:12px;color:#9a3412;font-size:14px}.footer{padding:42px 0 60px;color:#5d6b7e}.foot{display:flex;justify-content:space-between;padding-top:26px;background:linear-gradient(90deg,transparent,var(--line) 18%,var(--line) 82%,transparent) top /100% 1px no-repeat}.foot a{transition:color .2s var(--ease)}.foot a:hover{color:var(--blue)}.article{padding:48px 0 80px}.article>h1{font-size:46px;letter-spacing:-.04em;line-height:1.1;margin:0}.article-body{max-width:820px}.article-body h1{font-size:46px;letter-spacing:-.04em;line-height:1.1}.article-body h2{font-size:28px;letter-spacing:-.03em;margin:36px 0 12px}.article-body h3{font-size:20px;margin:28px 0 10px}.article-body .meta-line{color:var(--muted);margin:12px 0 28px}.article-body :where(p,li){font-size:17px;line-height:1.75;color:#243246}.article-body a{color:var(--blue);text-decoration:underline;text-underline-offset:3px}.article-body table{width:100%;border-collapse:collapse;margin:22px 0;font-size:15px;background:#fff}.article-body td,.article-body th{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}.article-body th{background:#f0f5fb}.article-body pre{background:#071b38;color:#e8f4ff;padding:16px 18px;border-radius:14px;overflow:auto;font-size:13px;line-height:1.55}.article-body code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.92em}.article-body :not(pre)>code{background:#eef4ff;padding:.1em .35em;border-radius:6px}.article-body blockquote{border-left:3px solid #155eef;margin:20px 0;padding:8px 16px;color:#334155;background:#f3f7ff;border-radius:0 12px 12px 0}.article-body .btn{text-decoration:none;margin-top:8px}.crumb{color:var(--muted);margin:0 0 18px}.crumb a{color:var(--blue)}.version-tag{display:inline-flex;align-items:center;border:1px solid #cfdcf2;background:#f3f7ff;padding:6px 10px;border-radius:999px;color:#2b5fb8;font:700 12px/1 ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:.02em}.version-record{max-width:820px;margin:0 0 22px;padding:18px 20px;border:1px solid #cfdcf2;background:#f7faff;border-radius:16px}.version-record p{margin:12px 0 0;color:var(--muted)}.version-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}.version-actions .btn{text-decoration:none}.cite-box{margin-top:42px;padding:22px 22px 8px;border-top:1px solid var(--line)}.cite-box h2{font-size:18px;margin:0 0 10px}.cite-box p{font-size:15px!important;word-break:break-word;color:var(--muted)!important}.list-grid .version-tag{margin-bottom:10px}.list-grid .card h3{margin-top:8px}.source-link{margin:14px 0 0}.source-link a{font-size:13px;font-weight:650}.list-grid .card h3 a:hover,.source-link a{color:var(--blue)}.catalog-group{margin-top:36px}.catalog-group h2{font-size:22px;letter-spacing:-.03em;margin:0 0 14px}.list-grid{display:grid;grid-gap:14px;gap:14px;margin-top:12px}.list-grid .card{min-height:0}.list-grid .meta-line{display:block;margin-top:12px;color:var(--muted);font-size:13px}.docs-page{padding:28px 0 80px;max-width:1280px}.docs-chrome{position:relative}.docs-skip{position:absolute;left:-9999px;top:0;z-index:5;padding:8px 12px;background:var(--navy);color:#fff;border-radius:8px}.docs-skip:focus{left:0}.docs-toolbar{display:none;gap:10px;margin-bottom:16px;flex-wrap:wrap}.docs-drawer-close,.docs-nav-toggle,.docs-toc-toggle{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:1px solid var(--line-strong);background:var(--paper);color:var(--ink);border-radius:10px;padding:9px 12px;font:650 13px/1.2 inherit;cursor:pointer}.docs-shell{display:grid;grid-template-columns:minmax(200px,250px) minmax(0,1fr);grid-gap:28px;gap:28px;align-items:start}.docs-chrome.has-toc .docs-shell{grid-template-columns:minmax(200px,250px) minmax(0,1fr) minmax(160px,210px)}.docs-sidebar,.docs-toc-rail{position:-webkit-sticky;position:sticky;top:88px;max-height:calc(100vh - 104px);overflow:auto;padding-right:4px}.docs-sidebar-inner{display:grid;grid-gap:14px;gap:14px}.docs-search input{width:100%;box-sizing:border-box;padding:10px 12px;border:1px solid var(--line-strong);border-radius:10px;background:#fff;font:inherit;color:var(--ink)}.docs-search-results{display:grid;grid-gap:8px;gap:8px}.docs-search-hit{display:grid;grid-gap:2px;gap:2px;padding:10px 12px;border:1px solid var(--line);border-radius:12px;background:#fff}.docs-search-hit.is-current,.docs-search-hit:hover{border-color:#9eb6de;background:#f5f8fd}.docs-search-hit-title{font-weight:700;font-size:14px}.docs-search-hit-meta{color:var(--muted);font-size:12px}.docs-search-hit-excerpt{color:#445468;font-size:13px;line-height:1.45}.docs-search-empty{margin:0;color:var(--muted);font-size:13px}.docs-tree-group+.docs-tree-group{margin-top:16px}.docs-tree-heading{margin:0 0 6px;color:#5d6b7e;font-size:11px;font-weight:750;letter-spacing:.08em;text-transform:uppercase}.docs-tree ul{list-style:none;margin:0;padding:0}.docs-tree li+li{margin-top:2px}.docs-tree a{display:flex;align-items:flex-start;justify-content:space-between;gap:8px;padding:7px 10px;border-radius:10px;color:#243246;font-size:13.5px;line-height:1.35}.docs-tree a:hover{background:#eef3fa;color:var(--ink)}.docs-tree a.is-current{background:#e8f0ff;color:#0f3d9e;font-weight:700}.docs-living-mark{flex:none;font-size:10px;font-weight:700;color:#5f4610;background:#fff6df;border:1px solid #e7d39a;border-radius:999px;padding:2px 6px}.docs-main{min-width:0}.docs-crumbs{margin:0 0 18px;font-size:13px}.docs-crumb-sep{margin:0 8px;color:#5d6b7e}.docs-prose{max-width:820px}.docs-prose h1,.docs-prose h2,.docs-prose h3,.docs-prose h4{scroll-margin-top:96px}.docs-title-row{display:grid;grid-gap:12px;gap:12px}.docs-title-row h1{margin:0}.docs-version-disclaimer{color:var(--muted);font-size:14px;margin:0 0 22px}.version-tag.is-living{color:#5f4610;background:#fff6df;border-color:#e7d39a}.docs-hub-boundary{color:var(--muted);max-width:48rem}.docs-hub-links{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin:8px 0 20px}.docs-hub-links a{color:var(--blue);font-weight:650}.docs-hub-group{margin-top:34px}.docs-hub-group h2{font-size:22px;letter-spacing:-.03em;margin:0 0 12px}.docs-hub-list{list-style:none;margin:0;padding:0;display:grid;grid-gap:14px;gap:14px}.docs-hub-list li{padding:16px 18px;border:1px solid var(--line);border-radius:14px;background:#fff}.docs-hub-item-head{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-bottom:8px}.docs-hub-item-head a{font-size:18px;font-weight:750;letter-spacing:-.02em}.docs-hub-item-head a:hover{color:var(--blue)}.docs-hub-list p{margin:0;color:#334155}.docs-toc-heading{margin:0 0 10px;color:#5d6b7e;font-size:11px;font-weight:750;letter-spacing:.08em;text-transform:uppercase}.docs-toc ul{list-style:none;margin:0;padding:0}.docs-toc li+li{margin-top:4px}.docs-toc a{display:block;color:#445468;font-size:13px;line-height:1.4;border-left:2px solid transparent;padding:4px 0 4px 10px}.docs-toc li.level-3 a{padding-left:20px;font-size:12.5px}.docs-toc a.is-active,.docs-toc a:hover{color:#1146b8;border-left-color:#155eef}.docs-toc-mobile{margin:0 0 18px;padding:14px 16px;border:1px solid var(--line);border-radius:14px;background:#fff}.docs-related{margin-top:36px;padding-top:18px;border-top:1px solid var(--line)}.docs-related h2{font-size:18px;margin:0 0 10px}.docs-related ul{margin:0;padding-left:18px}.docs-pager{display:grid;grid-template-columns:1fr 1fr;grid-gap:12px;gap:12px;margin-top:40px;padding-top:22px;border-top:1px solid var(--line)}.docs-pager-link{display:grid;grid-gap:4px;gap:4px;padding:14px 16px;border:1px solid var(--line);border-radius:14px;background:#fff}.docs-pager-link:hover{border-color:#9eb6de;background:#f5f8fd}.docs-pager-link.next{text-align:right}.docs-pager-label{color:var(--muted);font-size:12px;font-weight:650}.docs-pager-title{font-weight:700;font-size:15px}.docs-drawer{display:none}.docs-drawer.is-open{display:block;position:fixed;inset:0;z-index:40}.docs-drawer-backdrop{position:absolute;inset:0;border:0;background:rgba(7,27,56,.42);cursor:pointer}.docs-drawer-panel{position:absolute;inset:0 auto 0 0;width:min(320px,92vw);background:var(--bg);padding:16px;overflow:auto;box-shadow:var(--shadow)}.docs-drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}.docs-drawer-head p{margin:0;font-weight:750}body.docs-nav-open{overflow:hidden}@media (max-width:1023px){.docs-shell{grid-template-columns:1fr!important}.docs-sidebar.desktop-only,.docs-toc-rail.desktop-only{display:none}.docs-toolbar{display:flex}.docs-pager{grid-template-columns:1fr}.docs-pager-link.next{text-align:left}}@media (min-width:1024px){.docs-toc-mobile{display:none}}@media (max-width:1100px){.integrity{display:block}.cycle-board{margin-top:36px}}@media (max-width:820px){.mobile-nav.is-open{display:flex}.links{display:none}.nav-toggle{display:inline-block}.hero{padding-top:60px}.hero h1{font-size:58px}.meta{grid-template-columns:1fr 1fr}.model-top,.origin{display:block}.contact-grid,.docs,.flow,.pillars,.row{grid-template-columns:1fr}.row.head{display:none}.row>div{border-right:0}.compare .row.head+.row>div{border-top:0}.compare .row>div:before{content:attr(data-label);display:block;color:#5d6b7e;font-size:11px;text-transform:uppercase;letter-spacing:.1em;margin-bottom:4px}.cycle-board{margin-top:36px}.cycle{--cycle-size:min(320px,86vw)}.origin .btn{margin-top:0}.origin-actions{justify-content:flex-start;margin-top:22px}.foot{display:block}.foot div+div{margin-top:10px}}@media (max-width:520px){.wrap{width:min(100% - 26px,var(--max))}.icon-btn,.nav-toggle{width:44px;height:44px}.actions .btn.primary{padding:9px 12px}.site-header .actions>.btn{display:none}.hero h1{font-size:48px}.lead{font-size:17px}.section{padding:66px 0}.model{padding:28px}.meta{grid-template-columns:1fr}.meta div{border-bottom:1px solid var(--line)}.meta div:last-child{border-bottom:0}}@media (max-width:820px){html.lang-zh .hero h1{font-size:clamp(40px,7vw,58px)}}@media (max-width:520px){html.lang-zh .hero h1{font-size:42px}html.lang-zh .formula{font-size:16px}html.lang-zh .section h2{font-size:32px}html.lang-zh .model h3{font-size:28px}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.btn,.card,.cycle-arc,.cycle-note,.cycle-step i,.doc,.doc b,.flow .node,.foot a,.icon-btn,.lang-menu a,.links a,.nav-toggle i,.num{transition:none;animation:none}.eyebrow:before{animation:none}.btn:hover,.card:hover,.doc:hover,.doc:hover b,.flow .node:hover,.icon-btn:hover{transform:none;box-shadow:none}}.mobile-nav-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:6px;padding-top:12px;border-top:1px solid rgba(255,255,255,.16)}.mobile-nav-actions a{font-weight:600}.error-actions{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:20px}.notfound-links{display:flex;flex-wrap:wrap;gap:8px 18px;list-style:none;padding:0;margin:26px 0 0}.notfound-links a{color:var(--blue);font-weight:600}.diagnosis-panel{padding:24px;border:1px solid var(--line,#d5dee8);border-radius:12px;margin:24px 0}.diagnosis-form{display:grid;grid-gap:10px;gap:10px}.diagnosis-input-row{display:flex;gap:12px;flex-wrap:wrap}.diagnosis-input-row input{min-width:0;flex:1 1 260px;padding:12px;border:1px solid var(--line,#d5dee8);border-radius:8px;font:inherit;color:inherit;background:transparent}.diagnosis-input-row button:disabled{opacity:.6;cursor:wait}.diagnosis-metrics{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));grid-gap:16px;gap:16px;margin:24px 0}.diagnosis-metrics div{display:grid;grid-gap:8px;gap:8px}.diagnosis-metrics strong{font-size:1.6rem}.diagnosis-panel a,.diagnosis-panel p{overflow-wrap:anywhere}.diagnosis-result{border-top:1px solid var(--line,#d5dee8);margin-top:24px;padding-top:24px}.diagnosis-coverage{font-size:.9rem;color:var(--muted)}.diagnosis-actions{margin:24px 0;padding:20px;border-radius:10px;background:var(--soft,#edf3fb)}.diagnosis-actions article+article{margin-top:18px}.diagnosis-actions p{margin:6px 0 0}.diagnosis-tiers{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:20px;gap:20px;margin:32px 0}.diagnosis-tiers article{padding:24px;border:1px solid var(--line,#d5dee8);border-radius:12px}.diagnosis-tiers h2{font-size:1.15rem}@media (max-width:700px){.diagnosis-tiers{grid-template-columns:1fr}}.vgo-assessment{margin-block:32px;color:var(--ink)}.vgo-assessment-heading{max-width:780px;margin-bottom:28px}.vgo-assessment-kicker{font-size:.78rem;letter-spacing:.08em;color:var(--muted)}.vgo-assessment-heading h2{margin:12px 0;font-size:clamp(1.6rem,3vw,2.25rem);line-height:1.3}.vgo-assessment h3{font-size:1.15rem;margin-block:0 16px}.vgo-assessment-note{font-size:.85rem;color:var(--muted);line-height:1.7}.vgo-brand-facts{padding:24px;background:var(--soft);border-radius:12px;margin-block:24px}.vgo-brand-facts dl{margin:0;display:grid;grid-gap:14px;gap:14px}.vgo-brand-facts dt{font-size:.82rem;color:var(--muted)}.vgo-brand-facts dd{margin:4px 0 0;line-height:1.7}.vgo-brand-facts dd a{display:block;font-size:.8rem}.vgo-score-title{display:flex;align-items:baseline;justify-content:space-between;gap:16px}.vgo-score-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border:1px solid var(--line);border-radius:12px;overflow:hidden}.vgo-score-item{padding:20px;min-width:0}.vgo-score-item+.vgo-score-item{border-left:1px solid var(--line)}.vgo-score-item header{display:flex;justify-content:space-between;align-items:baseline}.vgo-score-item header>span{font-size:1.8rem;font-weight:600}.vgo-score-item small{display:block;font-size:.78rem;color:var(--muted)}.vgo-score-item header small{display:inline;margin-left:4px}.vgo-score-item p{font-size:.86rem}.vgo-score-track{height:4px;background:var(--line);border-radius:2px;overflow:hidden}.vgo-score-track span{display:block;height:100%;background:var(--blue);transition:width .25s ease}.vgo-score-status{display:block;margin-block:12px 6px;font-size:.84rem}.diagnosis-run-details>summary,.vgo-assessment details summary{cursor:pointer;font-size:.88rem;padding-block:10px}.vgo-assessment details{overflow-wrap:anywhere}.vgo-risk-section{margin-block:32px}.vgo-risk-priority{border-left:3px solid var(--blue);padding:22px 24px;background:var(--soft);border-radius:0 12px 12px 0}.vgo-risk-item{padding-block:20px;border-bottom:1px solid var(--line)}.vgo-risk-section h4{font-size:1.08rem;margin:8px 0 12px}.vgo-risk-section p{margin-block:8px;line-height:1.75}.vgo-question-map{border-block:1px solid var(--line);padding-block:8px}.vgo-question-map article{padding-block:16px}.vgo-question-map article>span{display:block;color:var(--muted);font-size:.82rem;margin-top:4px}.vgo-improvement{margin-block:28px}.vgo-improvement-plan{margin-top:24px;padding:24px;border:1px solid var(--line);border-radius:12px;animation:vgo-report-reveal .2s ease-out}.vgo-improvement-plan article+article{margin-top:24px}.vgo-improvement-plan li{line-height:1.8}.diagnosis-run-details{border-top:1px solid var(--line);margin-top:24px}.vgo-assessment button:focus-visible,.vgo-assessment summary:focus-visible{outline:2px solid var(--blue);outline-offset:4px}@keyframes vgo-report-reveal{0%{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}@media (max-width:900px){.vgo-score-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.vgo-score-item:nth-child(3){border-left:0}.vgo-score-item:nth-child(n+3){border-top:1px solid var(--line)}}@media (max-width:500px){.vgo-score-item{padding:16px 12px}.vgo-brand-facts,.vgo-improvement-plan,.vgo-risk-priority{padding:18px 16px}.vgo-score-title{flex-wrap:wrap}.vgo-improvement>.btn{width:100%}}@media (prefers-reduced-motion:reduce){.vgo-improvement-plan{animation:none}.vgo-score-track span{transition:none}}