:root{color-scheme:light;--theme-dark-color-canvas: #101725;--theme-dark-color-surface: #182234;--theme-dark-color-surface-subtle: #202d43;--theme-dark-color-surface-raised: #202d43;--theme-dark-color-ink: #edf2fc;--theme-dark-color-muted: #a8b6cd;--theme-dark-color-border: #35435c;--theme-dark-color-border-strong: #667994;--theme-dark-color-primary: #94b3ff;--theme-dark-color-primary-hover: #b2c8ff;--theme-dark-color-primary-soft: #253b66;--theme-dark-color-on-primary: #10224c;--theme-dark-color-success: #7ed7af;--theme-dark-color-success-soft: #173e31;--theme-dark-color-warning: #f1c171;--theme-dark-color-warning-soft: #42351d;--theme-dark-color-danger: #ffa2ae;--theme-dark-color-danger-hover: #ffc1c9;--theme-dark-color-on-danger: #4b1520;--theme-dark-color-danger-soft: #482a38;--theme-dark-color-focus: #94b3ff;--theme-dark-color-scrim: #050b16b3;--theme-dark-color-brand-dingtalk: #83b9ff;--theme-dark-color-brand-feishu: #77d2cb;--theme-dark-color-brand-lark: #83b9ff;--theme-dark-shadow-sm: 0 2px 8px #00000018;--theme-dark-shadow-dialog: 0 24px 80px #00000066;--color-canvas: #f6f8fc;--color-surface: #ffffff;--color-surface-subtle: #eef2f8;--color-surface-raised: #ffffff;--color-ink: #17243b;--color-muted: #596980;--color-border: #d9e1ee;--color-border-strong: #b5c2d8;--color-primary: #285de5;--color-primary-hover: #194ac6;--color-primary-soft: #e8efff;--color-on-primary: #ffffff;--color-success: #14734d;--color-success-soft: #e5f4ec;--color-warning: #8c570a;--color-warning-soft: #fff3dc;--color-danger: #b8303e;--color-danger-hover: #982332;--color-on-danger: #ffffff;--color-danger-soft: #ffedf0;--color-focus: #547eeb;--color-scrim: #0a142866;--color-video: #101827;--color-video-text: #f1f5fc;--color-video-muted: #b9c6db;--color-video-control: #263650;--color-video-control-hover: #354965;--color-video-border: #53647f;--color-brand-dingtalk: #2377d7;--color-brand-feishu: #258785;--color-brand-lark: #2377d7;--shadow-sm: 0 2px 8px #17243b08;--shadow-dialog: 0 24px 80px #0a142830;--font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;--font-family-mono: ui-monospace, SFMono-Regular, Consolas, monospace;--font-size-xs: .75rem;--font-size-sm: .875rem;--font-size-base: 1rem;--font-size-lg: 1.125rem;--font-size-xl: 1.25rem;--font-size-2xl: 1.5rem;--font-size-3xl: 2rem;--font-size-4xl: 2.5rem;--font-size-hero: 3.5rem;--line-height-tight: 1.2;--line-height-heading: 1.35;--line-height-body: 1.65;--line-height-reading: 1.85;--weight-regular: 400;--weight-medium: 500;--weight-semibold: 600;--weight-bold: 700;--tracking-tight: -.03em;--tracking-wide: .04em;--tracking-code: .08em;--space-0: 0px;--space-0\.5: 2px;--space-1: 4px;--space-1\.5: 6px;--space-2: 8px;--space-2\.5: 10px;--space-3: 12px;--space-4: 16px;--space-5: 20px;--space-6: 24px;--space-7: 28px;--space-8: 32px;--space-10: 40px;--space-12: 48px;--space-14: 56px;--space-16: 64px;--space-20: 80px;--space-24: 96px;--radius-sm: 6px;--radius-md: 8px;--radius-lg: 12px;--radius-pill: 999px;--border-width: 1px;--focus-width: 3px;--focus-offset: 3px;--control-height: 48px;--control-height-compact: 44px;--icon-sm: 16px;--icon-md: 20px;--icon-lg: 24px;--icon-brand: 32px;--opacity-disabled: .5;--duration-fast: .16s;--transition-fast: var(--duration-fast) ease;--z-skip: 100;--z-dialog: 50;--z-header: 10;--content-width: 1160px;--content-home: 960px;--content-reading: 760px;--content-auth: 440px;--header-height: 88px;--header-height-mobile: 76px;--page-gutter: var(--space-12)}:root[data-theme=dark]{color-scheme:dark;--color-canvas: var(--theme-dark-color-canvas);--color-surface: var(--theme-dark-color-surface);--color-surface-subtle: var(--theme-dark-color-surface-subtle);--color-surface-raised: var(--theme-dark-color-surface-raised);--color-ink: var(--theme-dark-color-ink);--color-muted: var(--theme-dark-color-muted);--color-border: var(--theme-dark-color-border);--color-border-strong: var(--theme-dark-color-border-strong);--color-primary: var(--theme-dark-color-primary);--color-primary-hover: var(--theme-dark-color-primary-hover);--color-primary-soft: var(--theme-dark-color-primary-soft);--color-on-primary: var(--theme-dark-color-on-primary);--color-success: var(--theme-dark-color-success);--color-success-soft: var(--theme-dark-color-success-soft);--color-warning: var(--theme-dark-color-warning);--color-warning-soft: var(--theme-dark-color-warning-soft);--color-danger: var(--theme-dark-color-danger);--color-danger-hover: var(--theme-dark-color-danger-hover);--color-on-danger: var(--theme-dark-color-on-danger);--color-danger-soft: var(--theme-dark-color-danger-soft);--color-focus: var(--theme-dark-color-focus);--color-scrim: var(--theme-dark-color-scrim);--color-brand-dingtalk: var(--theme-dark-color-brand-dingtalk);--color-brand-feishu: var(--theme-dark-color-brand-feishu);--color-brand-lark: var(--theme-dark-color-brand-lark);--shadow-sm: var(--theme-dark-shadow-sm);--shadow-dialog: var(--theme-dark-shadow-dialog)}@media(prefers-color-scheme:dark){:root:not([data-theme]){color-scheme:dark;--color-canvas: var(--theme-dark-color-canvas);--color-surface: var(--theme-dark-color-surface);--color-surface-subtle: var(--theme-dark-color-surface-subtle);--color-surface-raised: var(--theme-dark-color-surface-raised);--color-ink: var(--theme-dark-color-ink);--color-muted: var(--theme-dark-color-muted);--color-border: var(--theme-dark-color-border);--color-border-strong: var(--theme-dark-color-border-strong);--color-primary: var(--theme-dark-color-primary);--color-primary-hover: var(--theme-dark-color-primary-hover);--color-primary-soft: var(--theme-dark-color-primary-soft);--color-on-primary: var(--theme-dark-color-on-primary);--color-success: var(--theme-dark-color-success);--color-success-soft: var(--theme-dark-color-success-soft);--color-warning: var(--theme-dark-color-warning);--color-warning-soft: var(--theme-dark-color-warning-soft);--color-danger: var(--theme-dark-color-danger);--color-danger-hover: var(--theme-dark-color-danger-hover);--color-on-danger: var(--theme-dark-color-on-danger);--color-danger-soft: var(--theme-dark-color-danger-soft);--color-focus: var(--theme-dark-color-focus);--color-scrim: var(--theme-dark-color-scrim);--color-brand-dingtalk: var(--theme-dark-color-brand-dingtalk);--color-brand-feishu: var(--theme-dark-color-brand-feishu);--color-brand-lark: var(--theme-dark-color-brand-lark);--shadow-sm: var(--theme-dark-shadow-sm);--shadow-dialog: var(--theme-dark-shadow-dialog)}}.theme-toggle{display:inline-flex;flex:0 0 auto;align-items:center;justify-content:center;width:var(--control-height-compact);height:var(--control-height-compact);min-height:var(--control-height-compact);padding:0;border:var(--border-width) solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface);color:var(--color-muted);cursor:pointer}.theme-toggle:hover{background:var(--color-surface-subtle);color:var(--color-ink)}.theme-toggle:focus-visible{outline:var(--focus-width) solid var(--color-focus);outline-offset:var(--focus-offset)}.theme-toggle svg{width:var(--icon-md);height:var(--icon-md)}.theme-toggle .theme-sun{display:none}:root[data-theme=dark] .theme-toggle .theme-sun{display:block}:root[data-theme=dark] .theme-toggle .theme-moon{display:none}@media(prefers-color-scheme:dark){:root:not([data-theme]) .theme-toggle .theme-sun{display:block}:root:not([data-theme]) .theme-toggle .theme-moon{display:none}}@media(max-width:1100px){:root{--page-gutter: var(--space-8)}}@media(max-width:600px){:root{--page-gutter: var(--space-5)}}:root{--document-nav-width: 200px;--document-layout-width: 920px;font-family:var(--font-family);font-size:100%;font-synthesis:none;font-weight:var(--weight-regular);line-height:var(--line-height-body);color:var(--color-ink);background:var(--color-canvas);-webkit-text-size-adjust:100%}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:var(--space-24)}body{margin:0;font-size:var(--font-size-base)}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button,a,summary{-webkit-tap-highlight-color:transparent;touch-action:manipulation}a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{outline:var(--focus-width) solid var(--color-focus);outline-offset:var(--focus-offset)}h1,h2,h3,p,figure{margin:0}h1,h2,h3{font-weight:var(--weight-semibold);line-height:var(--line-height-heading)}svg{flex-shrink:0;vertical-align:middle}.site-icon{display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;width:var(--icon-md);height:var(--icon-md);line-height:1}.site-icon>svg{display:block;width:100%;height:100%}::selection{background:var(--color-primary-soft);color:var(--color-ink)}.container{width:min(var(--content-width),calc(100% - var(--page-gutter) * 2));margin-inline:auto}.skip-link{position:fixed;top:var(--space-2);left:var(--space-4);z-index:var(--z-skip);padding:var(--space-3) var(--space-5);border-radius:var(--radius-sm);background:var(--color-primary);color:var(--color-on-primary);transform:translateY(-150%)}.skip-link:focus{transform:translateY(0)}.site-header{height:var(--header-height);border-bottom:var(--border-width) solid var(--color-border)}.header-content{height:100%;display:flex;align-items:center;justify-content:space-between;gap:var(--space-6)}.site-brand{display:inline-flex;align-items:center;gap:var(--space-3);font-size:var(--font-size-xl);font-weight:var(--weight-semibold);white-space:nowrap}.site-brand svg{width:var(--icon-brand);height:var(--icon-brand);color:var(--color-primary)}.site-nav{display:flex;flex-shrink:0;align-items:center;gap:var(--space-2)}.auth-header-actions{display:flex;align-items:center;gap:var(--space-6);font-size:var(--font-size-base)}.site-nav .nav-icon{display:inline-flex;flex:0 0 auto;align-items:center;justify-content:center;width:var(--control-height-compact);height:var(--control-height-compact);border:var(--border-width) solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface);color:var(--color-muted)}.site-nav .nav-icon:hover{background:var(--color-surface-subtle);color:var(--color-ink)}.site-nav [aria-current=page]{color:var(--color-primary);background:var(--color-primary-soft)}.site-nav .nav-login{border-color:transparent;background:var(--color-primary);color:var(--color-on-primary)}.site-nav .nav-login:hover{color:var(--color-on-primary);background:var(--color-primary-hover)}.text-link:hover,.footer-content a:hover{color:var(--color-primary)}.button{display:inline-flex;justify-content:center;align-items:center;gap:var(--space-6);min-height:var(--control-height);padding:var(--space-3) var(--space-6);border:var(--border-width) solid transparent;border-radius:var(--radius-md);font-size:var(--font-size-base);font-weight:var(--weight-semibold);white-space:nowrap;transition:background var(--duration-fast)}.button-primary{background:var(--color-primary);color:var(--color-on-primary)}.button-primary:hover{background:var(--color-primary-hover)}.text-link{display:inline-flex;align-items:center;gap:var(--space-2);min-height:var(--control-height-compact);font-size:var(--font-size-sm)}.text-link svg{width:var(--icon-sm)}.section-label{font-size:var(--font-size-sm);letter-spacing:var(--tracking-wide);color:var(--color-primary);font-weight:var(--weight-medium);margin-bottom:var(--space-3)}.hero-actions{display:flex;gap:var(--space-6);align-items:center;margin-top:var(--space-8)}.site-footer{border-top:var(--border-width) solid var(--color-border);padding-block:var(--space-4);background:var(--color-canvas)}.footer-content{display:flex;justify-content:center}.main-site-link{display:inline-flex;align-items:center;gap:var(--space-2);min-height:var(--control-height-compact);font-size:var(--font-size-sm);color:var(--color-muted)}.main-site-link 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section+section{margin-top:var(--space-10)}.document-step{font-size:var(--font-size-sm);letter-spacing:var(--tracking-wide);color:var(--color-primary);display:block;margin-bottom:var(--space-2)}.document-body h2{font-size:var(--font-size-2xl);margin-bottom:var(--space-4)}.document-body p,.document-body li{font-size:var(--font-size-base);line-height:var(--line-height-reading);color:var(--color-muted)}.document-body p+p{margin-top:var(--space-4)}.document-body ol{padding-left:var(--space-6)}.document-body li{padding-left:var(--space-1);margin-block:var(--space-2)}.document-body a:not(.button){text-decoration:underline;text-underline-offset:var(--space-1);color:var(--color-primary)}.document-cta{padding-top:var(--space-8);border-top:var(--border-width) solid var(--color-border);margin-top:var(--space-12);display:flex;align-items:center;justify-content:space-between;gap:var(--space-5)}.privacy-document{max-width:var(--document-layout-width)}.not-found{padding-block:var(--space-24);min-height:65vh}.not-found h1{font-size:var(--font-size-4xl)}.not-found>p:not(.section-label){margin-top:var(--space-5);font-size:var(--font-size-base);color:var(--color-muted)}.console-loading{padding:var(--space-20) var(--space-6);display:flex;align-items:center;justify-content:center;color:var(--color-muted);font-size:var(--font-size-base)}.noscript-note{text-align:center;padding:var(--space-8);font-size:var(--font-size-base)}.noscript-note a{text-decoration:underline;margin-left:var(--space-4)}@media(max-width:800px){.auth-header-actions{gap:var(--space-3)}.document-layout{grid-template-columns:1fr;gap:var(--space-8)}.document-nav{position:static;flex-direction:row;gap:var(--space-2);flex-wrap:wrap}.document-nav a{background:var(--color-surface-subtle);padding:var(--space-1) var(--space-3);border-radius:var(--radius-sm);font-size:var(--font-size-sm)}.document-heading{margin-bottom:var(--space-6)}.document-body{max-width:none}.document-heading h1{font-size:var(--font-size-3xl)}}@media(max-width:600px){.site-header{height:var(--header-height-mobile)}.header-content{gap:var(--space-2)}.site-brand{font-size:var(--font-size-lg);gap:var(--space-2)}.site-footer{padding-bottom:calc(var(--space-4) + env(safe-area-inset-bottom))}.document-page{padding-block:var(--space-10) var(--space-12)}.document-heading{padding-bottom:var(--space-7)}.document-heading>p:last-child{font-size:var(--font-size-base);margin-top:var(--space-4)}.document-body h2{font-size:var(--font-size-xl)}.document-body section+section{margin-top:var(--space-8)}.document-cta{flex-direction:column;align-items:start}.not-found h1{font-size:var(--font-size-3xl)}.not-found>.hero-actions{flex-wrap:wrap;gap:var(--space-4)}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}