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rain{to{transform:translateY(125vh)}}@media(prefers-reduced-motion:reduce){.coderain__drop{animation:none;display:none}}.content-bg{position:fixed;inset:0;z-index:0;overflow:hidden;pointer-events:none;--content-bg-paper: #fafafa;--content-bg-grid: rgba(18, 18, 18, .095);--content-bg-grid-major: rgba(18, 18, 18, .16);--content-bg-margin: rgba(18, 18, 18, .22);--content-bg-edge: rgba(18, 18, 18, .11);--content-bg-hole: rgba(255, 255, 255, .54);--content-bg-hole-border: rgba(18, 18, 18, .14);--content-bg-shadow: rgba(18, 18, 18, .08);--content-bg-grid-size: 24px;--content-bg-grid-major-size: 120px;background-color:var(--content-bg-paper);background-image:linear-gradient(var(--content-bg-grid) 1px,transparent 1px),linear-gradient(90deg,var(--content-bg-grid) 1px,transparent 1px),linear-gradient(var(--content-bg-grid-major) 1px,transparent 1px),linear-gradient(90deg,var(--content-bg-grid-major) 1px,transparent 1px);background-position:center top;background-size:var(--content-bg-grid-size) var(--content-bg-grid-size),var(--content-bg-grid-size) var(--content-bg-grid-size),var(--content-bg-grid-major-size) var(--content-bg-grid-major-size),var(--content-bg-grid-major-size) var(--content-bg-grid-major-size)}.content-bg:after{position:absolute;inset:0;box-shadow:inset 0 0 clamp(4rem,10vw,8rem) var(--content-bg-shadow);content:""}.content-bg__margin-line{position:absolute;top:0;bottom:0;left:clamp(4rem,10vw,8.5rem);width:1px;background-color:var(--content-bg-margin)}.content-bg__paper-edge{position:absolute;left:clamp(1rem,3vw,2.5rem);right:clamp(1rem,3vw,2.5rem);height:1px;background-color:var(--content-bg-edge);opacity:.6}.content-bg__paper-edge--top{top:clamp(2.7rem,6vh,4.2rem)}.content-bg__paper-edge--bottom{bottom:clamp(2.7rem,6vh,4.2rem)}.content-bg__corner{position:absolute;width:clamp(5.5rem,11vw,10rem);height:clamp(5.5rem,11vw,10rem);border-color:var(--content-bg-edge);border-style:solid;opacity:.36}.content-bg__corner--top-left{top:clamp(1rem,3vw,2.4rem);left:clamp(1rem,3vw,2.4rem);border-width:1px 0 0 1px}.content-bg__corner--bottom-right{right:clamp(1rem,3vw,2.4rem);bottom:clamp(1rem,3vw,2.4rem);border-width:0 1px 1px 0}.content-bg__punches{position:absolute;left:clamp(1.15rem,3.2vw,2.5rem);top:50%;display:grid;gap:clamp(1.7rem,5vh,3.4rem);transform:translateY(-50%)}.content-bg__punches span{width:clamp(.42rem,.58vw,.64rem);height:clamp(.42rem,.58vw,.64rem);border:1px solid var(--content-bg-hole-border);border-radius:999px;background-color:var(--content-bg-hole);box-shadow:inset 0 .12rem .22rem var(--content-bg-shadow)}:root[data-theme=dark] .content-bg{--content-bg-paper: #030303;--content-bg-grid: rgba(245, 245, 245, .07);--content-bg-grid-major: rgba(245, 245, 245, .125);--content-bg-margin: rgba(245, 245, 245, .16);--content-bg-edge: rgba(245, 245, 245, .12);--content-bg-hole: rgba(255, 255, 255, .035);--content-bg-hole-border: rgba(245, 245, 245, .12);--content-bg-shadow: rgba(0, 0, 0, .42)}@media(max-width:48rem){.content-bg{--content-bg-grid-size: 20px;--content-bg-grid-major-size: 100px}.content-bg__margin-line{left:clamp(2.8rem,12vw,4.4rem)}.content-bg__punches{left:.85rem;opacity:.58}.content-bg__paper-edge{left:.8rem;right:.8rem}}.floating-action-button{display:inline-flex;align-items:center;justify-content:center;gap:.45rem;width:clamp(2.9rem,3.1vw,3.6rem);height:clamp(2.9rem,3.1vw,3.6rem);padding:0;border:1px solid color-mix(in srgb,var(--line) 16%,transparent);border-radius:999px;background:color-mix(in srgb,white 76%,transparent);color:var(--line);box-shadow:0 .75rem 2rem color-mix(in srgb,var(--line) 12%,transparent);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);cursor:pointer;transition:color .22s ease}.floating-action-button-icon,.floating-action-button-icon svg{display:inline-flex;width:1.1rem;height:1.1rem}.floating-action-button-text{font-size:var(--type-sm);font-weight:600;line-height:1}.floating-action-button--document-progress{font-variant-numeric:tabular-nums}.document-progress-fab-percent{min-width:2.1rem;font-size:var(--type-xs);font-weight:700;line-height:1;text-align:center}.document-progress-fab-icon,.document-progress-fab-icon svg{display:inline-flex;width:1.12rem;height:1.12rem}.document-progress-fab-percent[hidden],.document-progress-fab-icon[hidden],.floating-action-button[hidden]{display:none!important}:root[data-theme=dark] .floating-action-button{border-color:#ffffff1f;background:#14161ee0;color:#f5f5f5f5;box-shadow:0 .75rem 2rem #00000047}:root{--paper: #ffffff;--line: #111111;--line-soft: rgba(17, 17, 17, .88);--accent: var(--line);--border-soft: color-mix(in srgb, var(--line) 14%, transparent);--text-muted: color-mix(in srgb, var(--line) 68%, transparent);--article-paper-surface: #fdfcf9;--article-paper-border: rgba(17, 17, 17, .13);--article-paper-shadow: rgba(17, 17, 17, .12);--radius-sm: .5rem;--radius-md: 1rem;--font-size-base: clamp(.9375rem, 1.35vw, 1.8rem);--type-xs: clamp(12.5px, .62rem + .08vw, 15px);--type-sm: clamp(14px, .72rem + .1vw, 17px);--type-base: clamp(15.5px, .78rem + .12vw, 19px);--type-md: clamp(17px, .9rem + .14vw, 21px);--type-lg: clamp(20px, 1.05rem + .2vw, 26px);--type-xl: clamp(26px, 1.35rem + .32vw, 36px);--type-2xl: clamp(31px, 1.55rem + .42vw, 44px);--type-content-body: clamp(17px, 15px + .18vw, 20px);--type-content-body-zh: clamp(16.8px, 14.9px + .18vw, 19.5px);--type-content-code: clamp(13.8px, 12.6px + .08vw, 15.8px);--type-content-caption: clamp(14px, 13px + .08vw, 16.2px);--type-content-h1: var(--type-2xl);--type-content-h2: var(--type-xl);--type-content-h3: 1.38rem;--type-content-h4: 1.2rem;--type-content-h5: 1.06rem;--type-content-h6: .98rem;--type-toc-title: 1.12rem;--type-toc-depth-1: .96rem;--type-toc-depth-2: .88rem;--type-toc-depth-3: .82rem;--type-toc-depth-4: .77rem;--type-toc-depth-5: .73rem;--type-toc-depth-6: .7rem;--type-toc-mobile-title: .96rem;--shell-max: min(92vw, 112.5rem);--space: clamp(.1rem, .2vw, 1.25rem);--header-main-gap: clamp(1.25rem, 1.4vw, 2.75rem);--footer-height: clamp(.5rem, 1vh, 1rem);--main-col-1-min: 7.5rem;--main-col-1-size: clamp(7.5rem, 8.5vw, 10.5rem);--main-col-2-min: 7.5rem;--main-col-3-min: 7.5rem;--main-col-1-fr: .5fr;--main-col-2-fr: 2.5fr;--main-col-3-fr: 3.5fr;--main-col-gap: .2rem;--nav-flyout-min: clamp(10.5rem, 18vw, 14rem);--menu-trigger-width: clamp(2.4rem, 2.8vw, 3rem);--menu-trigger-height: clamp(2rem, 2.2vw, 2.5rem);--menu-icon-size: clamp(1.3rem, 1.7vw, 2rem);--icon-btn-size: clamp(2.25rem, 3vw, 3.75rem);--icon-size: clamp(1.4rem, 2vw, 2.25rem);--signature-link-size: clamp(1rem, 1.4vw, 1.45rem);--layout-sticky-top: max( clamp(.35rem, 1vw, .75rem), env(safe-area-inset-top) );--layout-sticky-main-top: clamp(4.4rem, 8vw, 6.4rem)}:root[data-theme=dark]{--paper: #000000;--line: #f5f5f5;--line-soft: rgba(245, 245, 245, .9);--article-paper-surface: #08090a;--article-paper-border: rgba(245, 245, 245, .15);--article-paper-shadow: rgba(0, 0, 0, .48)}*{box-sizing:border-box}html{font-size:var(--font-size-base);overflow-x:clip;overflow-y:auto;scrollbar-gutter:stable;overscroll-behavior-y:none;background-color:#fff;color-scheme:light}:root[data-theme=dark]{background-color:#000;color-scheme:dark}body{margin:0;min-height:100dvh;background-color:inherit;color:var(--line);line-height:1.5;font-family:Biotif,PingFang SC,Microsoft YaHei,Noto Sans SC,sans-serif;overflow-x:clip;overflow-y:visible}.content-page{width:100%;display:block;align-self:stretch}.content-page-body{font-size:inherit;height:auto;padding:clamp(.85rem,1.8vw,1.4rem);overflow:visible}.content-page-body h1,.listing-header-title,.collection-page-title,.article-content-title{color:transparent;-webkit-text-stroke:1px var(--line);text-stroke:1px var(--line)}.content-page-body h1{margin:0 0 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CanvasText;--line-soft: CanvasText;--accent: LinkText;--border-soft: CanvasText;--text-muted: GrayText;--content-text-color: CanvasText}html,body{background-color:Canvas!important;color:CanvasText!important;color-scheme:light dark}a{color:LinkText!important}:is(button,input,textarea,select){border-color:ButtonBorder!important;color:ButtonText!important}:is(a,button,summary,input,textarea,select,[role=button],[tabindex]:not([tabindex="-1"])):focus-visible{outline:2px solid Highlight!important;outline-offset:3px!important}:is(.content-page-body h1,.listing-header-title,.collection-page-title,.article-content-title,.article-comments-title,.latest-articles-title-text,.latest-articles-year-label){color:CanvasText!important;-webkit-text-stroke:0!important;text-stroke:0!important}.content-page-body .content-spoiler{border:1px solid CanvasText!important;background:CanvasText!important;color:Canvas!important}.content-page-body 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none){.home-header{view-transition-name:site-header}.profile-area{view-transition-name:primary-panel}.latest-area{view-transition-name:secondary-panel}.home-footer{view-transition-name:site-footer}html[data-disable-panel-transition=true] .profile-area,html[data-disable-panel-transition=true] .latest-area{view-transition-name:none}}.home-header{position:sticky;top:var(--layout-sticky-top);z-index:30;padding-top:clamp(.55rem,1vw,.85rem);padding-right:clamp(.55rem,1vw,.85rem);padding-bottom:0;padding-left:clamp(.55rem,1vw,.85rem);display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:end;column-gap:clamp(.3rem,.8vw,.55rem)}.wire-box{min-width:0}.signature-area{width:min(100%,clamp(10.5rem,34vw,23.75rem));min-height:clamp(2.75rem,7vh,4rem);display:flex;align-items:flex-end;justify-self:start;padding-bottom:0;margin-bottom:0}.signature-stack{width:100%;display:flex;flex-direction:column;align-items:flex-start;gap:.35rem}.signature-collapse{position:relative;z-index:7;width:100%;min-height:var(--menu-trigger-height)}.signature-collapse:before{content:"";position:absolute;top:100%;left:0;z-index:2;width:100%;height:var(--signature-collapse-panel-hit-height, 0px);pointer-events:auto}.signature-collapse-trigger{width:var(--menu-trigger-width);height:var(--menu-trigger-height);border:0;padding:0;background:transparent;color:var(--line-soft);display:inline-flex;align-items:center;justify-content:center;cursor:pointer;list-style:none;transition:color .2s ease}.signature-collapse-trigger::-webkit-details-marker{display:none}.signature-collapse-trigger 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137.5rem)}}.floating-action-stack{position:fixed;right:clamp(.9rem,4vw,1.35rem);bottom:clamp(.95rem,4vw,1.35rem);z-index:45;display:flex;align-items:center;gap:.7rem;pointer-events:none}.floating-action-stack>*{pointer-events:auto}@media(min-width:56.25rem){.floating-action-button--toc{display:none}}.floating-action-stack[hidden]{display:none!important}.hamburger,.mobile-nav-drawer .signature-collapse-links a{-webkit-tap-highlight-color:transparent}:root[data-theme=dark] .mobile-nav-drawer .nav-panel{border-color:#ffffff1f;background:#101218f0;box-shadow:0 1rem 2.4rem #00000059}:root[data-theme=dark] .mobile-nav-drawer .signature-collapse-links a{color:#f5f5f5f5}@media not all and (min-width:56.25rem){html,body{height:auto;overflow-x:hidden}.home-shell{height:auto;min-height:100dvh;overflow:visible}.home-main{align-items:start}.profile-area,.latest-area{height:auto;max-height:none;overflow:visible}}