:root{color-scheme:light dark;--brand:#003153;--canvas:#f7f9fc;--surface:#fff;--surface-alt:#eaf0f5;--text:#122534;--muted:#536777;--accent:#007e9e;--secondary:#c13e70;--border:#a9bac7;--focus:#00a6c8;--shadow-color:#003153;--display:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;--body:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;--measure:66ch}
@media(prefers-color-scheme:dark){:root{--canvas:#071b2b;--surface:#0d2940;--surface-alt:#123650;--text:#f7f9fc;--muted:#b7c7d3;--accent:#55d5e5;--secondary:#f08cb2;--border:#41627a;--focus:#75e8f2;--shadow-color:#00101c}}
:root[data-theme=light]{color-scheme:light;--canvas:#f7f9fc;--surface:#fff;--surface-alt:#eaf0f5;--text:#122534;--muted:#536777;--accent:#007e9e;--secondary:#c13e70;--border:#a9bac7;--focus:#00a6c8;--shadow-color:#003153}
:root[data-theme=dark]{color-scheme:dark;--canvas:#071b2b;--surface:#0d2940;--surface-alt:#123650;--text:#f7f9fc;--muted:#b7c7d3;--accent:#55d5e5;--secondary:#f08cb2;--border:#41627a;--focus:#75e8f2;--shadow-color:#00101c}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--canvas);color:var(--text);font:18px/1.78 var(--body);text-rendering:optimizeLegibility}img{display:block;max-width:100%;height:auto}a{color:inherit;text-decoration-color:var(--accent);text-decoration-thickness:2px;text-underline-offset:.22em}button,input{font:inherit;color:inherit}button{cursor:pointer}.shell{width:min(1200px,calc(100% - 40px));margin-inline:auto}.skip-link{position:fixed;z-index:99;left:12px;top:12px;transform:translateY(-150%);padding:10px 14px;background:var(--text);color:var(--canvas)}.skip-link:focus{transform:none}.site-header{position:relative;z-index:20;border-bottom:2px solid var(--border);background:color-mix(in srgb,var(--canvas) 92%,transparent);backdrop-filter:blur(12px)}.header-inner{min-height:76px;display:flex;align-items:center;gap:28px}.brand{font:900 1rem/1 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var(--border);background:#003153}.hero-image{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center}.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(0,49,83,.98) 0%,rgba(0,49,83,.86) 30%,rgba(0,49,83,.08) 66%)}.hero-copy{position:relative;z-index:2;padding:clamp(90px,13vw,160px) 0;color:#f7f9fc}.hero-copy h1{max-width:720px;margin:.15em 0 .25em;font:900 clamp(3rem,8vw,6.5rem)/.94 var(--display);letter-spacing:-.07em;text-wrap:balance;text-shadow:5px 5px 0 #001a2c}.hero-copy .lede{max-width:560px;font-size:clamp(1.08rem,2vw,1.4rem);color:#e1edf5}.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:34px}.hero-actions a{display:inline-flex;align-items:center;min-height:48px;padding:8px 18px;border:2px solid #f7f9fc;background:#f7f9fc;color:#003153;font:900 .82rem/1 var(--display);text-decoration:none;box-shadow:5px 5px 0 #55d5e5}.hero-actions a+ a{background:transparent;color:#f7f9fc;box-shadow:none}.realm-section{padding:84px 0 96px}.section-heading{display:grid;grid-template-columns:1fr minmax(280px,520px);gap:40px;align-items:end;margin-bottom:44px}.section-heading h2,.page-hero h1{margin:.15em 0;font:900 clamp(2.2rem,5vw,4.5rem)/1 var(--display);letter-spacing:-.05em}.section-heading p,.page-hero p{color:var(--muted)}.realm-map{display:grid;grid-template-columns:repeat(12,1fr);grid-template-rows:repeat(2,minmax(190px,auto));gap:18px}.realm-node{position:relative;display:flex;flex-direction:column;justify-content:space-between;overflow:hidden;padding:24px;border:2px solid var(--text);background:var(--surface);text-decoration:none;box-shadow:6px 6px 0 var(--shadow-color);transition:transform 180ms}.realm-node:hover{transform:translate(-3px,-3px)}.realm-node:nth-child(1){grid-column:span 7}.realm-node:nth-child(2){grid-column:span 5}.realm-node:nth-child(3){grid-column:span 5}.realm-node:nth-child(4){grid-column:span 7}.realm-node h3{margin:.2em 0;font:900 clamp(1.5rem,3vw,2.6rem)/1 var(--display)}.realm-node p{max-width:36ch;margin:0;color:var(--muted)}.realm-number{align-self:flex-end;font:900 3.5rem/.8 var(--display);color:color-mix(in srgb,var(--accent) 28%,transparent)}.realm-node::before{content:"";position:absolute;width:72px;height:72px;right:20px;top:20px;background:var(--accent);clip-path:polygon(0 25%,25% 25%,25% 0,75% 0,75% 25%,100% 25%,100% 75%,75% 75%,75% 100%,25% 100%,25% 75%,0 75%);opacity:.12}.latest{padding:84px 0;border-top:2px solid var(--border);background:var(--surface-alt)}.article-list{border-top:2px solid var(--text)}.article-row{display:grid;grid-template-columns:150px minmax(0,1fr) auto;gap:28px;align-items:start;padding:28px 0;border-bottom:1px solid var(--border);text-decoration:none}.article-row:hover h3{color:var(--accent)}.article-row time,.meta{font:700 .78rem/1.5 var(--display);color:var(--muted)}.article-row h3{margin:0;font:800 clamp(1.35rem,2.5vw,2.1rem)/1.2 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var(--body);letter-spacing:-.055em}.article-header .deck{max-width:56ch;color:var(--muted);font-size:1.2rem}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:64px;width:min(1060px,calc(100% - 40px));margin:0 auto 100px}.prose{max-width:var(--measure);font-size:1rem;line-height:1.78}.prose h2{margin:2em 0 .65em;font:900 1.8rem/1.2 var(--body)}.prose h3{margin:1.8em 0 .5em;font:800 1.3rem/1.3 var(--body)}.prose blockquote{margin:2em 0;padding:20px 24px;border-left:4px solid var(--secondary);background:var(--surface);font-size:1.1rem}.prose pre{overflow:auto;padding:22px;border:2px solid var(--border);background:#06131f;color:#eaf7ff;box-shadow:5px 5px 0 var(--shadow-color);font:15px/1.65 var(--display)}.prose code:not(pre code){padding:.1em .3em;background:var(--surface-alt);font-family:var(--display)}.prose table{width:100%;border-collapse:collapse;font-size:.9rem}.prose th,.prose td{padding:12px;border:1px solid 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var(--text);background:var(--brand);color:#f7f9fc;box-shadow:8px 8px 0 var(--accent);font:900 3rem/1 var(--display)}.error-page{min-height:70vh;display:grid;place-items:center;text-align:center}.error-code{font:900 clamp(6rem,22vw,16rem)/.75 var(--display);color:var(--accent);text-shadow:8px 8px 0 var(--shadow-color)}.error-links{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}.error-links a{padding:10px 14px;border:2px solid var(--text);background:var(--surface);text-decoration:none}
:focus-visible{outline:3px solid var(--focus);outline-offset:4px}@media(max-width:1024px){.article-layout{grid-template-columns:1fr}.toc{position:static;order:-1;max-width:var(--measure);border-left:0;border-top:2px solid var(--border);border-bottom:2px solid var(--border)}}
@media(max-width:768px){body{font-size:17px}.shell{width:min(100% - 28px,1200px)}.menu-button{display:block;position:relative;z-index:2;margin-left:auto;touch-action:manipulation}.primary-nav{display:none;position:absolute;z-index:30;left:14px;right:14px;top:76px;flex-direction:column;align-items:stretch;padding:18px;border:2px solid var(--text);background:var(--surface);box-shadow:6px 6px 0 var(--shadow-color)}.primary-nav[data-open]{display:flex}.primary-nav a{min-height:44px;display:flex;align-items:center}.hero{min-height:auto}.hero-image{position:relative;height:620px;min-height:620px;object-fit:cover;object-position:68% center}.hero::after{background:linear-gradient(180deg,#003153 0%,rgba(0,49,83,.92) 58%,rgba(0,49,83,.12) 88%)}.hero-copy{position:absolute;inset:0;padding:66px 14px}.hero-copy h1{font-size:clamp(2.5rem,13vw,4.5rem);max-width:10ch}.hero-copy .lede{font-size:1rem;max-width:36ch}.hero-actions{margin-top:20px}.section-heading{grid-template-columns:1fr;gap:8px}.realm-map{display:flex;flex-direction:column}.realm-node{min-height:210px}.article-row{grid-template-columns:1fr;gap:10px}.article-row .badge{justify-self:start}.footer-grid,.section-feature,.about-layout{grid-template-columns:1fr}.page-hero .realm-code{float:none}.quest-stats{border-left:0;border-top:4px solid var(--accent)}.search-panel{grid-template-columns:1fr}.about-layout{gap:36px}.save-point{max-width:180px}.article-header-inner,.article-layout{width:min(100% - 28px,1060px)}}
@media(max-width:430px){.hero-image{min-height:590px;object-position:68% bottom}.hero::after{background:linear-gradient(180deg,#003153 0%,rgba(0,49,83,.94) 58%,rgba(0,49,83,.12) 86%)}.hero-copy{padding-top:52px}.hero-actions a{width:100%;justify-content:center}.realm-section,.latest{padding:62px 0}.error-links a{width:100%}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}.realm-node:hover,.pixel-button:hover{transform:none}}
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.pixel-particles{position:fixed;inset:0;z-index:18;pointer-events:none;overflow:hidden;mix-blend-mode:screen}.pixel-particles i{position:absolute;left:var(--x);bottom:-12px;width:var(--size);height:var(--size);background:var(--accent);box-shadow:8px 0 0 color-mix(in srgb,var(--secondary) 55%,transparent);opacity:0;animation:pixelFloat var(--duration) linear var(--delay) infinite}@keyframes pixelFloat{0%{transform:translate3d(0,20px,0);opacity:0}15%{opacity:.28}60%{transform:translate3d(18px,-55vh,0);opacity:.18}100%{transform:translate3d(-8px,-105vh,0);opacity:0}}
.pixel-transition{position:fixed;inset:0;z-index:100;display:grid;grid-template-columns:repeat(8,1fr);grid-template-rows:repeat(6,1fr);pointer-events:none;visibility:hidden}.pixel-transition i{background:#003153;transform:scale(0);opacity:0}.page-leaving .pixel-transition{visibility:visible}.page-leaving .pixel-transition i{animation:pixelShatterIn 420ms steps(4,end) forwards;animation-delay:calc((var(--i) % 8 + (var(--i) % 5)) * 10ms)}@keyframes pixelShatterIn{0%{transform:scale(.15) rotate(12deg);opacity:0}45%{transform:scale(.8) rotate(0);opacity:1}100%{transform:scale(1.04);opacity:1}}body:not(.page-ready)>main{opacity:0;transform:translateY(8px)}body.page-ready>main{animation:pageAssemble 360ms steps(5,end) both}@keyframes pageAssemble{from{opacity:0;transform:translateY(10px);clip-path:inset(0 0 18% 0)}to{opacity:1;transform:none;clip-path:inset(0)}}
@media(max-width:768px){.realm-literature .page-hero,.realm-philosophy .page-hero,.realm-engineering .page-hero,.realm-tools .page-hero{min-height:380px;background-position:center}.pixel-particles i:nth-child(2n){display:none}}
@media(prefers-reduced-motion:reduce){.pixel-particles,.pixel-transition{display:none!important}body:not(.page-ready)>main,body:not(.page-ready)>.site-header{opacity:1;transform:none}}

/* Refined ambient world layer and transition system */
:root{--world-image:url('/assets/images/hero-four-realms.png');--world-opacity:.22}
html{background:var(--canvas)}body{position:relative;isolation:isolate;min-height:100vh;background:color-mix(in srgb,var(--canvas) 84%,transparent)}body::before{content:"";position:fixed;z-index:-2;inset:-12%;background-image:linear-gradient(color-mix(in srgb,var(--canvas) 35%,transparent),color-mix(in srgb,var(--canvas) 58%,transparent)),var(--world-image);background-size:cover;background-position:center;filter:blur(22px) saturate(.88);opacity:var(--world-opacity);transform:scale(1.1);animation:worldDrift 26s ease-in-out infinite alternate;will-change:transform,background-position}.realm-literature,.realm-philosophy{--world-image:url('/assets/images/bg-literature-philosophy.png')}.realm-engineering,.realm-tools{--world-image:url('/assets/images/bg-engineering-tools.png')}@keyframes worldDrift{0%{transform:scale(1.08) translate3d(-1.5%,-1%,0);background-position:45% 48%}50%{transform:scale(1.16) translate3d(1%,.5%,0);background-position:54% 51%}100%{transform:scale(1.11) translate3d(-.5%,1%,0);background-position:49% 55%}}.latest,.quest-stats,.search-panel,.empty,.prose blockquote,.badge,.realm-node{background:color-mix(in srgb,var(--surface) 88%,transparent);backdrop-filter:blur(12px)}.site-footer{background:color-mix(in srgb,var(--canvas) 70%,transparent);backdrop-filter:blur(14px)}
.brand{display:inline-flex;align-items:center}.brand-avatar{width:38px;height:38px;margin-right:10px;border:2px solid var(--text);border-radius:4px;object-fit:cover;box-shadow:3px 3px 0 var(--accent)}
.pixel-particles,.pixel-transition{display:none!important}.tetromino-particles{position:fixed;inset:0;z-index:18;pointer-events:none;overflow:hidden}.tetromino{--piece:#00d9ff;position:absolute;left:var(--x);bottom:-34px;width:6px;height:6px;color:var(--piece);background:currentColor;opacity:0;filter:drop-shadow(0 0 1px #003153) drop-shadow(0 0 5px currentColor);animation:tetroFloat var(--duration) linear var(--delay) infinite}.shape-0{--piece:#00d9ff;width:24px;height:6px}.shape-1{--piece:#ffd500;width:12px;height:12px}.shape-2{--piece:#a66cff;width:18px;height:12px;clip-path:polygon(0 0,100% 0,100% 50%,66.66% 50%,66.66% 100%,33.33% 100%,33.33% 50%,0 50%)}.shape-3{--piece:#43dc71;width:18px;height:12px;clip-path:polygon(33.33% 0,100% 0,100% 50%,66.66% 50%,66.66% 100%,0 100%,0 50%,33.33% 50%)}.shape-4{--piece:#ff5f7f;width:18px;height:12px;clip-path:polygon(0 0,66.66% 0,66.66% 50%,100% 50%,100% 100%,33.33% 100%,33.33% 50%,0 50%)}.shape-5{--piece:#4b78ff;width:12px;height:18px;clip-path:polygon(0 0,50% 0,50% 66.66%,100% 66.66%,100% 100%,0 100%)}.shape-6{--piece:#ff913d;width:12px;height:18px;clip-path:polygon(50% 0,100% 0,100% 100%,0 100%,0 66.66%,50% 66.66%)}@keyframes tetroFloat{0%{transform:translate3d(0,28px,0) rotate(0);opacity:0}12%{opacity:.72}55%{transform:translate3d(var(--drift),-52vh,0) rotate(90deg);opacity:.58}100%{transform:translate3d(calc(var(--drift) * -.5),-108vh,0) rotate(180deg);opacity:0}}
@view-transition{navigation:auto}::view-transition-old(root){animation:pagePixelVanish 680ms steps(14,end) both;mask-image:repeating-conic-gradient(#000 0 25%,transparent 0 50%);mask-size:8px 8px;transform-origin:center}::view-transition-new(root){animation:pagePixelAssemble 620ms steps(12,end) both;transform-origin:center}@keyframes pagePixelVanish{0%{opacity:1;filter:none;mask-size:4px 4px;transform:scale(1)}35%{opacity:.92;filter:contrast(1.08) saturate(1.1);mask-position:0 0;mask-size:8px 8px}70%{opacity:.48;mask-position:23px -17px;mask-size:14px 14px;transform:scale(1.012)}100%{opacity:0;filter:blur(2px) contrast(1.2);mask-position:80px -60px;mask-size:28px 28px;transform:scale(1.025)}}@keyframes pagePixelAssemble{0%{opacity:0;filter:blur(3px);clip-path:inset(48% 0 48% 0)}45%{opacity:.68;filter:blur(1px);clip-path:inset(15% 0 12% 0)}100%{opacity:1;filter:none;clip-path:inset(0)}}
.pixel-page-ghost{position:fixed;z-index:99;inset:0;overflow:hidden;pointer-events:none;opacity:0;background:var(--canvas);mask-image:repeating-conic-gradient(#000 0 25%,transparent 0 50%);mask-size:4px 4px}.pixel-page-ghost-frame{position:absolute;left:0;top:0;width:100%;min-height:100vh;background:color-mix(in srgb,var(--canvas) 84%,transparent)}.pixel-page-ghost.is-active{opacity:1;animation:ghostPageVanish 700ms steps(16,end) forwards}@keyframes ghostPageVanish{0%{opacity:1;filter:none;mask-size:4px 4px;mask-position:0 0}28%{opacity:.96;filter:contrast(1.06);mask-size:7px 7px;mask-position:3px -2px}58%{opacity:.7;filter:contrast(1.15) saturate(1.12);mask-size:11px 11px;mask-position:19px -13px}82%{opacity:.35;filter:blur(1px) contrast(1.25);mask-size:18px 18px;mask-position:47px -35px}100%{opacity:0;filter:blur(3px) contrast(1.35);mask-size:30px 30px;mask-position:96px -72px;transform:scale(1.018)}}.pixel-dust-fallback{position:fixed;inset:0;z-index:100;pointer-events:none;visibility:hidden}.pixel-dust-fallback i{position:absolute;left:var(--x);top:var(--y);width:4px;height:4px;background:color-mix(in srgb,var(--text) 68%,var(--accent));opacity:0}.page-leaving .pixel-dust-fallback{visibility:visible}.page-leaving .pixel-dust-fallback i{animation:dustVanish 620ms steps(10,end) forwards;animation-delay:calc((var(--i) % 19) * 6ms)}.page-leaving>main,.page-leaving>.site-header,.page-leaving>.site-footer{animation:contentVanish 680ms steps(14,end) forwards}@keyframes dustVanish{0%{opacity:0;transform:scale(.25)}28%{opacity:.85}100%{opacity:0;transform:translate3d(calc((var(--i) % 7 - 3) * 7px),calc((var(--i) % 9 - 4) * 7px),0) scale(.05)}}@keyframes contentVanish{0%{opacity:1;filter:none}55%{opacity:.72;filter:contrast(1.15)}100%{opacity:0;filter:blur(3px);clip-path:polygon(0 0,100% 0,100% 14%,94% 14%,94% 28%,100% 28%,100% 43%,88% 43%,88% 57%,100% 57%,100% 72%,92% 72%,92% 86%,100% 86%,100% 100%,0 100%)}}
@media(max-width:768px){.brand-avatar{width:34px;height:34px}}
@media(prefers-reduced-motion:reduce){body::before{animation:none}.tetromino-particles,.pixel-dust-fallback{display:none!important}::view-transition-old(root),::view-transition-new(root){animation:none!important}}

/* Persistent camera layer and cursor repulsion */
body::before{display:none!important}body{background:color-mix(in srgb,var(--canvas) 68%,transparent)}.world-backdrop{position:fixed;z-index:-1;inset:0;overflow:hidden;pointer-events:none;contain:strict}.world-backdrop::after{content:"";position:absolute;inset:0;background:color-mix(in srgb,var(--canvas) 18%,transparent)}.world-backdrop-image{position:absolute;inset:-22%;background-image:linear-gradient(color-mix(in srgb,var(--canvas) 12%,transparent),color-mix(in srgb,var(--canvas) 28%,transparent)),var(--world-image);background-size:cover;background-position:center;opacity:.52;transform-origin:center;transform:translateZ(0);animation:cameraTraverse 72s cubic-bezier(.45,.05,.55,.95) infinite alternate;will-change:transform;backface-visibility:hidden}.theme-only-background .world-backdrop-image{display:none}.theme-only-background .world-backdrop::after{background:var(--canvas)}@keyframes cameraTraverse{0%{transform:translate3d(-8%,-4%,0) scale(1.08)}34%{transform:translate3d(-1%,4%,0) scale(1.19)}68%{transform:translate3d(7%,-3%,0) scale(1.25)}100%{transform:translate3d(10%,5%,0) scale(1.12)}}
.tetromino-repel-field{display:none!important}
@keyframes tetroFloat{0%{transform:translate3d(var(--push-x),calc(28px + var(--push-y)),0) rotate(0);opacity:0}12%{opacity:.72}55%{transform:translate3d(calc(var(--drift) + var(--push-x)),calc(-52vh + var(--push-y)),0) rotate(90deg);opacity:.58}100%{transform:translate3d(calc(var(--push-x) - var(--drift)),calc(-108vh + var(--push-y)),0) rotate(180deg);opacity:0}}
@media(prefers-reduced-motion:reduce){.world-backdrop-image{animation:none;transform:scale(1.08)}.tetromino-repel-field{display:none}}
@media(max-width:768px){.latest,.quest-stats,.search-panel,.empty,.prose blockquote,.badge,.realm-node,.site-footer,.site-header{backdrop-filter:none;-webkit-backdrop-filter:none}}
@media(max-width:768px){.site-header{position:relative!important;z-index:1000!important;overflow:visible!important;isolation:isolate}.header-inner{position:relative;overflow:visible}.primary-nav{position:absolute!important;z-index:1001!important;top:calc(100% + 2px)!important;left:0!important;right:0!important;width:auto;min-height:0;max-height:calc(100vh - 92px);overflow-y:auto;background:var(--surface)!important;color:var(--text)!important;opacity:1!important;visibility:visible!important;transform:none!important}.primary-nav:not([data-open]){display:none!important}.primary-nav[data-open]{display:flex!important}.primary-nav[data-open] a,.primary-nav[data-open] button{position:relative;z-index:1;display:flex!important;opacity:1!important;visibility:visible!important;color:var(--text)!important}}
body.page-ready>.site-header{animation:none!important;clip-path:none!important;transform:none!important;opacity:1!important}
@media(max-width:768px){.primary-nav[data-mobile-portal]{position:fixed!important;z-index:2147483000!important;top:78px!important;left:14px!important;right:14px!important;width:auto!important;margin:0!important;max-height:calc(100dvh - 92px);overflow-y:auto;overscroll-behavior:contain;background:var(--surface)!important;border:2px solid var(--text)!important}.primary-nav[data-mobile-portal]:not([data-open]){display:none!important}.primary-nav[data-mobile-portal][data-open]{display:flex!important}}

/* About portrait and contact details */
.about-portrait{align-self:start;margin:0}.about-portrait img{width:100%;aspect-ratio:1;object-fit:cover;border:3px solid var(--text);background:var(--surface);box-shadow:8px 8px 0 var(--accent)}.about-portrait figcaption{margin-top:16px}.contact-list{display:grid;gap:12px;margin-top:18px;font-style:normal}.contact-list a{display:grid;grid-template-columns:84px minmax(0,1fr);align-items:center;min-height:48px;padding:10px 14px;border-block:1px solid var(--border);text-decoration:none;overflow-wrap:anywhere}.contact-list a:hover{color:var(--accent)}.contact-list span{font:800 .68rem/1 var(--display);letter-spacing:.1em;color:var(--muted)}
@media(max-width:768px){.about-portrait{max-width:180px}.contact-list a{grid-template-columns:1fr;gap:6px}}
.community{max-width:920px;margin:48px auto 96px;padding-top:32px;border-top:1px solid var(--border)}
.community-heading{margin-bottom:24px}.comment-form{display:grid;gap:12px;margin-bottom:28px}.comment-form label{display:grid;gap:8px}.comment-form textarea{width:100%;padding:12px;border:1px solid var(--border);background:var(--surface);color:var(--text);font:inherit;resize:vertical}.comment-form button{justify-self:start;min-height:44px;padding:9px 18px;border:2px solid var(--text);background:var(--text);color:var(--background);font:inherit;cursor:pointer}.comment-item{padding:18px 0;border-top:1px solid var(--border)}.comment-item header{display:flex;justify-content:space-between;gap:18px;color:var(--muted);font-size:.9rem}.comment-item p{white-space:pre-wrap}.management-note{padding:10px 12px;border-left:3px solid var(--accent);background:var(--surface-alt);color:var(--muted)}

.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}.account-entry{display:flex;align-items:center;gap:8px}.account-entry button,.admin-door{min-height:44px;border:1px solid var(--border);background:transparent;color:inherit;padding:8px 10px;font:800 .7rem/1 var(--display);text-decoration:none}.account-signup{background:var(--text)!important;color:var(--canvas)!important}.account-name{max-width:130px;overflow:hidden;text-overflow:ellipsis;font:800 .7rem/1 var(--display);color:var(--accent)}.admin-door{display:grid;place-items:center;width:44px;padding:0;border-color:var(--accent);background:color-mix(in srgb,var(--surface) 75%,transparent)}.admin-door>span[aria-hidden]{position:relative;width:17px;height:23px;border:2px solid currentColor;box-shadow:3px 3px 0 var(--accent)}.admin-door>span[aria-hidden]::after{content:"";position:absolute;right:2px;top:10px;width:3px;height:3px;background:currentColor}.auth-modal[hidden]{display:none}.auth-modal{position:fixed;z-index:1000;inset:0;display:grid;place-items:center;padding:24px}.auth-scrim{position:absolute;inset:0;width:100%;height:100%;border:0;background:rgba(1,12,22,.62);backdrop-filter:blur(12px) saturate(.72);cursor:default}.auth-dialog{position:relative;width:min(520px,100%);max-height:calc(100dvh - 48px);overflow:auto;padding:28px;border:2px solid #f7f9fc;background:color-mix(in srgb,var(--brand) 88%,#071b2b);color:#f7f9fc;box-shadow:8px 8px 0 #55d5e5}.auth-dialog::before{content:"";position:absolute;inset:7px;pointer-events:none;border:1px dashed color-mix(in srgb,#55d5e5 65%,transparent)}.auth-dialog-head{position:relative;display:flex;justify-content:space-between;gap:20px;align-items:start}.auth-dialog-head h2{margin:.2rem 0 0;font:900 clamp(2rem,7vw,3.2rem)/1 var(--display)}.auth-close{display:grid;place-items:center;width:44px;height:44px;padding:0;border:1px solid #a9bac7;background:transparent;color:#f7f9fc}.auth-close svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:2}.auth-mode-tabs{position:relative;display:grid;grid-template-columns:1fr 1fr;margin:22px 0;border:1px solid #a9bac7}.auth-mode-tabs button{min-height:44px;border:0;background:transparent;color:#f7f9fc;font:800 .78rem/1 var(--display)}.auth-mode-tabs button[aria-selected="true"]{background:#f7f9fc;color:#003153}.auth-modal-form{position:relative;display:grid;gap:14px}.auth-modal-form>label{display:grid;gap:6px;font-weight:700}.auth-modal-form input{min-height:46px;padding:9px 11px;border:1px solid #a9bac7;background:#071b2b;color:#f7f9fc;font:inherit}.auth-honeypot{position:fixed!important;left:-9999px!important;width:1px!important;height:1px!important;overflow:hidden!important}.auth-modal-error{min-height:1.5em;margin:0;color:#ffd1dc}.auth-submit{min-height:48px;border:2px solid #f7f9fc;background:#f7f9fc;color:#003153;font:900 .82rem/1 var(--display);box-shadow:5px 5px 0 #55d5e5}.auth-submit:disabled{opacity:.55;cursor:wait}.human-check{display:grid;gap:8px;margin-top:4px}.human-check-head{display:flex;justify-content:space-between;gap:16px;align-items:center;font:800 .72rem/1.4 var(--display)}.human-check-head span{color:#9bdce7}.human-check-help,.human-check-status{margin:0;font-size:.82rem;line-height:1.5;color:#d7e8f2}.pixel-slider{--slider-progress:0%;--target-start:55%;--target-width:12%;position:relative;height:54px;border:2px solid #a9bac7;background:repeating-linear-gradient(90deg,#071b2b 0 12px,#0d2940 12px 24px);touch-action:none;overflow:hidden}.pixel-slider-target{position:absolute;inset-block:5px;left:var(--target-start);width:var(--target-width);display:grid;place-items:center;border:2px dashed #f7f9fc;background:color-mix(in srgb,#55d5e5 42%,transparent);animation:targetPulse 800ms steps(2,end) infinite}.pixel-slider-target span{font:800 .58rem/1 var(--display)}.pixel-slider-thumb{position:absolute;z-index:2;left:clamp(0px,calc(var(--slider-progress) - 23px),calc(100% - 46px));top:2px;width:46px;height:46px;padding:0;border:2px solid #f7f9fc;background:#003153;color:#f7f9fc;box-shadow:3px 3px 0 #55d5e5;touch-action:none;cursor:grab}.pixel-slider-thumb:active{cursor:grabbing}.pixel-slider-thumb span{display:block;width:16px;height:16px;margin:auto;background:currentColor;clip-path:polygon(0 0,75% 0,75% 25%,100% 25%,100% 75%,75% 75%,75% 100%,0 100%,0 75%,25% 75%,25% 25%,0 25%)}.human-check[data-complete] .pixel-slider{border-color:#65e6a0}.human-check[data-complete] .pixel-slider-thumb{background:#137a4b;box-shadow:3px 3px 0 #65e6a0}.human-check-status[data-state="error"]{color:#ffd1dc}.human-check-status[data-state="success"]{color:#9ff0c5}@keyframes targetPulse{50%{opacity:.55}}body.auth-modal-open{overflow:hidden}
@media(max-width:768px){.account-entry{width:100%;flex-wrap:wrap}.account-entry button{flex:1}.account-name{margin-right:auto}.auth-modal{padding:12px}.auth-dialog{max-height:calc(100dvh - 24px);padding:22px 18px}.pixel-slider{height:60px}.pixel-slider-thumb{top:3px;width:50px;height:50px;left:clamp(0px,calc(var(--slider-progress) - 25px),calc(100% - 50px))}.human-check-head{align-items:start;flex-direction:column;gap:2px}}
@media(max-width:768px){.primary-nav[data-open] .account-signup{border-color:var(--text)!important;background:var(--text)!important;color:var(--canvas)!important}}
@media(prefers-reduced-motion:reduce){.auth-scrim{backdrop-filter:none}.pixel-slider-target{animation:none}}
.auth-modal [hidden]{display:none!important}

/* Stable account shell and continuous page handoff */
.account-entry{display:flex;align-items:center;justify-content:center;gap:8px;min-width:128px;min-height:44px}.account-entry[aria-busy="true"]{border:1px solid var(--border);background:linear-gradient(90deg,transparent 0 35%,color-mix(in srgb,var(--accent) 18%,transparent) 50%,transparent 65%);background-size:220% 100%;animation:accountLoading 1.1s steps(8,end) infinite}.account-loading{font:800 .62rem/1 var(--display);letter-spacing:.08em;color:var(--muted)}@keyframes accountLoading{to{background-position:-220% 0}}
.page-load-veil{position:fixed;z-index:2147483500;inset:0;pointer-events:auto;background-color:#071b2b;background-image:linear-gradient(135deg,rgba(85,213,229,.14),transparent 38%),repeating-conic-gradient(rgba(85,213,229,.16) 0 25%,transparent 0 50%);background-size:auto,12px 12px;opacity:1;clip-path:inset(0);will-change:opacity,clip-path,filter}.page-load-veil::before{content:"LOADING SAVE ···";position:absolute;left:50%;top:50%;translate:-50% -50%;padding:12px 16px;border:1px solid rgba(247,249,252,.7);color:#f7f9fc;background:#003153;font:800 .68rem/1 var(--display);letter-spacing:.12em;box-shadow:5px 5px 0 #55d5e5}.page-revealed .page-load-veil{animation:pageVeilReveal 560ms steps(12,end) forwards}@keyframes pageVeilReveal{0%{opacity:1;filter:none;clip-path:inset(0)}55%{opacity:.82;filter:contrast(1.2);clip-path:polygon(0 0,100% 0,100% 18%,92% 18%,92% 36%,100% 36%,100% 55%,88% 55%,88% 73%,100% 73%,100% 100%,0 100%)}100%{opacity:0;filter:blur(2px);clip-path:polygon(0 0,100% 0,100% 7%,0 7%,0 21%,92% 21%,92% 34%,0 34%,0 48%,86% 48%,86% 62%,0 62%,0 76%,94% 76%,94% 90%,0 90%)}}
:root[data-theme=light] .page-load-veil{background-color:#f7f9fc;background-image:linear-gradient(135deg,rgba(0,126,158,.13),transparent 38%),repeating-conic-gradient(rgba(0,49,83,.09) 0 25%,transparent 0 50%)}:root[data-theme=light] .page-load-veil::before{border-color:#003153;color:#003153;background:#fff;box-shadow:5px 5px 0 #00a6c8}@media(prefers-color-scheme:light){:root:not([data-theme=dark]) .page-load-veil{background-color:#f7f9fc;background-image:linear-gradient(135deg,rgba(0,126,158,.13),transparent 38%),repeating-conic-gradient(rgba(0,49,83,.09) 0 25%,transparent 0 50%)}:root:not([data-theme=dark]) .page-load-veil::before{border-color:#003153;color:#003153;background:#fff;box-shadow:5px 5px 0 #00a6c8}}
.pixel-page-ghost.is-active{opacity:1;animation:ghostPageCover 500ms steps(12,end) forwards}@keyframes ghostPageCover{0%{opacity:1;filter:none;mask-size:4px 4px}55%{opacity:.94;filter:contrast(1.14);mask-size:9px 9px;mask-position:17px -11px}100%{opacity:1;filter:blur(2px) contrast(1.3);mask-size:18px 18px;mask-position:48px -36px;transform:scale(1.015);background:#071b2b}}
.page-handoff-veil{position:fixed;z-index:2147483499;inset:0;display:grid;place-items:center;pointer-events:none;visibility:hidden;opacity:0;background-color:#071b2b;background-image:linear-gradient(135deg,rgba(85,213,229,.14),transparent 38%),repeating-conic-gradient(rgba(85,213,229,.16) 0 25%,transparent 0 50%);background-size:auto,12px 12px;clip-path:inset(50% 0);contain:strict;will-change:opacity,clip-path}.page-handoff-veil span{padding:12px 16px;border:1px solid rgba(247,249,252,.7);color:#f7f9fc;background:#003153;font:800 .68rem/1 var(--display);letter-spacing:.12em;box-shadow:5px 5px 0 #55d5e5}.page-handoff-veil.is-active{visibility:visible;opacity:1;animation:pageHandoffCover 340ms steps(10,end) both}@keyframes pageHandoffCover{0%{clip-path:inset(50% 0);background-size:auto,4px 4px}45%{clip-path:inset(28% 0);background-size:auto,8px 8px}100%{clip-path:inset(0);background-size:auto,12px 12px}}:root[data-theme=light] .page-handoff-veil{background-color:#f7f9fc;background-image:linear-gradient(135deg,rgba(0,126,158,.13),transparent 38%),repeating-conic-gradient(rgba(0,49,83,.09) 0 25%,transparent 0 50%)}:root[data-theme=light] .page-handoff-veil span{border-color:#003153;color:#003153;background:#fff;box-shadow:5px 5px 0 #00a6c8}@media(prefers-color-scheme:light){:root:not([data-theme=dark]) .page-handoff-veil{background-color:#f7f9fc;background-image:linear-gradient(135deg,rgba(0,126,158,.13),transparent 38%),repeating-conic-gradient(rgba(0,49,83,.09) 0 25%,transparent 0 50%)}:root:not([data-theme=dark]) .page-handoff-veil span{border-color:#003153;color:#003153;background:#fff;box-shadow:5px 5px 0 #00a6c8}}
@media(prefers-reduced-motion:reduce){.account-entry[aria-busy="true"],.page-revealed .page-load-veil,.page-handoff-veil.is-active{animation:none}.page-revealed .page-load-veil{opacity:0}.page-handoff-veil.is-active{clip-path:inset(0)}}
.human-check[data-complete]{display:flex;align-items:center;justify-content:space-between;gap:14px;min-height:48px;padding:10px 12px;border:2px solid #65e6a0;background:color-mix(in srgb,#137a4b 28%,transparent)}.human-check[data-complete] .human-check-head{display:block}.human-check[data-complete] .human-check-head strong::after{content:" · OK";color:#9ff0c5}.human-check[data-complete] [data-check-device],.human-check[data-complete] .human-check-help,.human-check[data-complete] .pixel-slider{display:none}.human-check[data-complete] .human-check-status{min-height:0;margin:0;color:#9ff0c5;white-space:nowrap}
@media(max-width:430px){.human-check[data-complete]{align-items:flex-start;flex-direction:column;gap:4px}.human-check[data-complete] .human-check-status{white-space:normal}}
.human-check[data-completing] .pixel-slider{border-color:#65e6a0;animation:checkTrackConfirm 460ms steps(6,end) both}.human-check[data-completing] .pixel-slider-target{border-style:solid;animation:checkTargetConfirm 460ms steps(5,end) both}.human-check[data-completing] .pixel-slider-thumb{background:#137a4b;box-shadow:0 0 0 #65e6a0;animation:checkThumbConfirm 460ms steps(5,end) both}.human-check[data-complete]{animation:checkCompactIn 240ms steps(4,end) both}@keyframes checkTrackConfirm{0%{filter:none}35%{filter:brightness(1.8) saturate(1.3)}70%{background-size:8px 100%;filter:brightness(1.25)}100%{filter:none;box-shadow:inset 0 0 0 3px rgba(101,230,160,.28)}}@keyframes checkTargetConfirm{0%{transform:scale(1)}50%{transform:scale(.78);background:#65e6a0;color:#003153}100%{transform:scale(1);background:rgba(101,230,160,.48)}}@keyframes checkThumbConfirm{0%{transform:scale(1)}45%{transform:scale(1.16);box-shadow:0 0 0 6px rgba(101,230,160,.26)}100%{transform:scale(.9);box-shadow:0 0 0 2px #65e6a0}}@keyframes checkCompactIn{from{opacity:.35;transform:scaleY(.72)}to{opacity:1;transform:none}}@media(prefers-reduced-motion:reduce){.human-check[data-completing] .pixel-slider,.human-check[data-completing] .pixel-slider-target,.human-check[data-completing] .pixel-slider-thumb,.human-check[data-complete]{animation:none}}
.auth-text-button{min-height:44px;padding:8px 0;border:0;background:transparent;color:#75e8f2;text-decoration:underline;font:inherit;cursor:pointer}.auth-reset-waiting{margin:18px 0;padding:14px;border:1px solid #55d5e5;background:rgba(7,27,43,.65)}.auth-reset-waiting p{margin:0 0 8px}

/* Article publication layouts */
.article-kicker{display:flex;gap:8px;flex-wrap:wrap}.reading-layout-switch{position:sticky;z-index:12;top:10px;display:flex;justify-content:flex-end;align-items:center;gap:8px;margin-bottom:24px;padding:10px;background:color-mix(in srgb,var(--surface) 92%,transparent);border:1px solid var(--border);backdrop-filter:blur(10px)}.reading-layout-switch span{margin-right:auto;font:800 .72rem/1 var(--display);color:var(--muted)}.reading-layout-switch button{min-height:44px;padding:8px 12px;border:1px solid var(--border);background:var(--canvas);color:var(--text);font:800 .72rem/1 var(--display)}.reading-layout-switch button[aria-pressed="true"]{border-color:var(--text);background:var(--text);color:var(--canvas)}
.layout-book[data-book-view="spread"] .article-layout{display:block;width:min(1500px,calc(100% - 40px));margin-bottom:72px}.layout-book[data-book-view="spread"] .prose{max-width:none;height:clamp(560px,72vh,860px);padding:clamp(28px,4vw,64px);overflow-x:auto;overflow-y:hidden;column-width:min(38ch,calc((100vw - 190px)/2));column-gap:clamp(48px,7vw,108px);column-rule:1px solid var(--border);column-fill:auto;scroll-snap-type:x proximity;background:color-mix(in srgb,var(--surface) 96%,transparent);border:2px solid var(--border);box-shadow:10px 10px 0 var(--shadow-color);font-family:ui-serif,Georgia,"Songti SC","Noto Serif CJK SC",serif;line-height:1.92}.layout-book[data-book-view="spread"] .prose>*{break-inside:avoid-column}.layout-book[data-book-view="spread"] .prose p{break-inside:auto}.layout-book[data-book-view="spread"] .prose img{max-height:62vh;object-fit:contain;break-inside:avoid}.layout-book[data-book-view="scroll"] .prose{font-family:ui-serif,Georgia,"Songti SC","Noto Serif CJK SC",serif;line-height:1.92}
.layout-poetry .article-header{text-align:center}.layout-poetry .article-header h1,.layout-poetry .article-header .deck{margin-inline:auto}.layout-poetry .article-layout{display:block;width:min(720px,calc(100% - 40px))}.layout-poetry .prose{max-width:42ch;margin-inline:auto;padding:clamp(28px,5vw,60px);background:color-mix(in srgb,var(--surface) 88%,transparent);border-inline:1px solid var(--border);font-family:ui-serif,Georgia,"Songti SC","Noto Serif CJK SC",serif;font-size:1.1rem;line-height:2.15}.layout-poetry .prose p{white-space:pre-line;margin-block:1.7em}.layout-poetry .prose h2{text-align:center;font-weight:600;letter-spacing:.08em}
.layout-engineering .article-layout{display:block;width:min(1280px,calc(100% - 40px))}.layout-engineering .prose{max-width:82ch}.layout-engineering .prose pre{border-left:5px solid var(--accent)}.layout-engineering .prose h2{padding-bottom:.4em;border-bottom:2px solid var(--border);font-family:var(--display)}.layout-engineering .prose table{background:color-mix(in srgb,var(--surface) 92%,transparent)}
.prose img{margin:2em auto;border:1px solid var(--border);box-shadow:6px 6px 0 var(--shadow-color)}

/* Community discussion */
.community{width:min(980px,calc(100% - 40px));max-width:none;margin:64px auto 110px;padding:clamp(24px,4vw,48px);border:2px solid var(--border);background:color-mix(in srgb,var(--surface) 94%,transparent);box-shadow:8px 8px 0 var(--shadow-color);backdrop-filter:blur(12px)}.community-heading{display:grid;grid-template-columns:minmax(0,1fr) minmax(240px,.8fr);gap:24px;align-items:end;margin-bottom:28px;padding-bottom:24px;border-bottom:2px solid var(--text)}.community-heading h2{margin:.15em 0;font:900 clamp(2rem,5vw,3.6rem)/1 var(--display)}.community-heading>p:last-child{color:var(--muted);margin:0}.comment-form{display:grid;gap:14px;margin-bottom:34px}.comment-form label{display:grid;gap:10px;font-weight:800}.comment-form textarea{min-height:150px;width:100%;padding:16px;border:2px solid var(--border);background:var(--canvas);color:var(--text);font:inherit;resize:vertical;box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--accent) 16%,transparent)}.comment-form textarea:focus{border-color:var(--focus)}.comment-form button{justify-self:start;min-width:150px;min-height:48px;padding:10px 20px;border:2px solid var(--text);background:var(--text);color:var(--canvas);font:900 .8rem/1 var(--display);box-shadow:4px 4px 0 var(--accent);cursor:pointer}.comment-form button:hover{transform:translate(-1px,-1px);box-shadow:6px 6px 0 var(--accent)}.comment-form button:disabled{opacity:.6;cursor:wait}.comment-login-prompt{padding:18px;border:1px dashed var(--border);background:var(--canvas);color:var(--muted)}.comment-login-prompt a{font-weight:800;color:var(--accent)}.comment-item{margin-top:14px;padding:20px;border:1px solid var(--border);background:var(--canvas)}.comment-item header{display:flex;justify-content:space-between;gap:18px;padding-bottom:10px;border-bottom:1px solid var(--border);color:var(--muted);font-size:.9rem}.comment-item strong{color:var(--text)}.comment-item p{margin-bottom:0;white-space:pre-wrap}.comment-empty{padding:22px;border:1px dashed var(--border);text-align:center;color:var(--muted)}
@media(max-width:900px){.layout-book[data-book-view="spread"] .prose{column-width:calc(100vw - 100px);column-gap:48px}.community-heading{grid-template-columns:1fr}.reading-layout-switch{top:6px}}
@media(max-width:600px){.layout-book[data-book-view="spread"] .article-layout{width:min(100% - 20px,1500px)}.layout-book[data-book-view="spread"] .prose{height:68vh;padding:24px;column-width:calc(100vw - 72px);column-gap:36px}.reading-layout-switch{position:relative;top:auto;justify-content:stretch;flex-wrap:wrap}.reading-layout-switch span{width:100%}.reading-layout-switch button{flex:1}.community{width:min(100% - 20px,980px);padding:22px 16px}.comment-form button{width:100%}}

/* Book reader: paginated, customizable and touch-friendly. */
.book-reader-chrome{position:sticky;top:8px;z-index:14;width:min(1480px,calc(100% - clamp(48px,8vw,160px)));margin-bottom:22px}.book-reader-chrome .reading-layout-switch{position:static;margin:0;padding:9px 12px;box-shadow:0 10px 28px rgba(0,49,83,.12)}.reading-layout-switch output{min-width:84px;text-align:center;font:800 .72rem/1 var(--display);color:var(--muted)}
.book-reader-panel{position:absolute;top:calc(100% + 8px);right:0;display:grid;gap:14px;width:min(980px,100%);padding:16px;border:1px solid var(--border);background:color-mix(in srgb,var(--surface) 97%,transparent);box-shadow:0 20px 46px rgba(0,20,40,.28);backdrop-filter:blur(14px)}.book-reader-panel[hidden]{display:none}.book-settings{grid-template-columns:repeat(3,minmax(160px,1fr))}.book-setting{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:10px;min-height:44px}.book-setting label,.book-setting-select{font:700 .78rem/1.3 var(--ui);color:var(--muted)}.book-setting input[type="range"]{width:100%;accent-color:var(--accent)}.book-setting output{min-width:48px;text-align:right;font:700 .75rem/1 var(--display)}.book-setting-select{grid-template-columns:auto 1fr}.book-setting-select select{min-height:42px;padding:8px;border:1px solid var(--border);background:var(--canvas);color:var(--text);font:inherit}.book-settings>button{min-height:44px;border:1px solid var(--border);background:var(--canvas);color:var(--text);font:700 .78rem/1 var(--ui)}.book-progress-jump{display:none}
.book-toc{grid-template-columns:repeat(2,minmax(0,1fr));max-height:min(55vh,520px);overflow:auto}.book-toc button{min-height:44px;padding:10px 12px;border:0;border-bottom:1px solid var(--border);background:transparent;color:var(--text);text-align:left;font:600 .9rem/1.4 var(--ui)}.book-toc button[data-level="3"]{padding-left:28px;color:var(--muted)}
.book-bookmarks{max-width:620px}.book-bookmarks>header{display:flex;align-items:center;justify-content:space-between;gap:18px;padding-bottom:12px;border-bottom:1px solid var(--border)}.book-bookmarks>header div{display:grid;gap:4px}.book-bookmarks>header small{color:var(--muted)}.book-bookmarks>header button{min-height:44px;padding:9px 13px;border:1px solid var(--border);background:var(--text);color:var(--canvas);font:700 .8rem/1 var(--ui)}.book-bookmarks>header button:disabled{opacity:.45}.bookmarks-row{display:grid;grid-template-columns:1fr auto;gap:8px;border-bottom:1px solid var(--border)}.bookmarks-row button{min-height:44px;border:0;background:transparent;color:var(--text);font:inherit}.bookmark-jump{text-align:left}.bookmark-remove{padding-inline:12px;color:var(--secondary)!important}.bookmarks-empty{margin:0;padding:18px 4px;color:var(--muted)}
.layout-book .prose{font-size:var(--reader-font-size,19px);line-height:var(--reader-line-height,1.9);user-select:none;-webkit-user-select:none;-webkit-touch-callout:none}.layout-book[data-book-font="serif"] .prose{font-family:ui-serif,Georgia,"Songti SC","Noto Serif CJK SC",serif}.layout-book[data-book-font="sans"] .prose{font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif}.layout-book[data-book-font="system"] .prose{font-family:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC",sans-serif}
.layout-book[data-reader-theme="paper"]{--reader-paper:#e7edf1;--reader-ink:#263b49}.layout-book[data-reader-theme="sepia"]{--reader-paper:#ead8b7;--reader-ink:#3f2f24}.layout-book[data-reader-theme="night"]{--reader-paper:#111820;--reader-ink:#d8dee5}.layout-book[data-reader-theme]:not([data-reader-theme="theme"]) .prose{background:var(--reader-paper);color:var(--reader-ink);border-color:color-mix(in srgb,var(--reader-ink) 24%,transparent)}
.layout-book[data-book-lock="on"]{overscroll-behavior:none}body[data-book-lock="on"]{touch-action:none;overscroll-behavior:none}
.layout-book[data-book-view="spread"] .article-layout{position:relative;width:min(1480px,calc(100% - clamp(48px,8vw,160px)));overflow:visible;filter:drop-shadow(0 18px 24px rgba(0,20,40,.24))}.layout-book[data-book-view="spread"][data-book-resolved-pages="2"] .article-layout::after{content:"";position:absolute;z-index:2;top:0;bottom:0;left:50%;width:var(--book-column-gap,64px);transform:translateX(-50%);pointer-events:none;background:linear-gradient(90deg,var(--reader-paper,var(--surface)) 0,color-mix(in srgb,var(--reader-paper,var(--surface)) 78%,#000) 28%,rgba(0,0,0,.34) 47%,rgba(0,0,0,.52) 50%,rgba(0,0,0,.34) 53%,color-mix(in srgb,var(--reader-paper,var(--surface)) 78%,#000) 72%,var(--reader-paper,var(--surface)) 100%);box-shadow:-16px 0 26px -18px rgba(0,0,0,.85),16px 0 26px -18px rgba(0,0,0,.85),inset 1px 0 rgba(255,255,255,.12),inset -1px 0 rgba(255,255,255,.12)}.layout-book[data-book-view="spread"] .prose{box-sizing:border-box;width:100%;max-width:none;height:clamp(540px,74dvh,900px);padding:var(--reader-page-margin,48px);overflow-x:auto;overflow-y:hidden;overscroll-behavior:contain;touch-action:pan-y;column-width:var(--book-page-width,38ch);column-gap:var(--book-column-gap,64px);column-rule:0;column-fill:auto;scroll-snap-type:none;scrollbar-width:thin;background:var(--reader-paper,color-mix(in srgb,var(--surface) 98%,transparent));color:var(--reader-ink,var(--text));border:1px solid color-mix(in srgb,currentColor 22%,transparent);box-shadow:inset 0 0 32px rgba(0,0,0,.045)}.layout-book[data-book-view="spread"][data-book-resolved-pages="2"] .prose{background:linear-gradient(90deg,var(--reader-paper,color-mix(in srgb,var(--surface) 98%,transparent)) 0 calc(50% - (var(--book-column-gap,64px) * .5)),transparent calc(50% - (var(--book-column-gap,64px) * .5)) calc(50% + (var(--book-column-gap,64px) * .5)),var(--reader-paper,color-mix(in srgb,var(--surface) 98%,transparent)) calc(50% + (var(--book-column-gap,64px) * .5)) 100%)}.layout-book[data-book-view="spread"] .prose p{orphans:3;widows:3}.layout-book[data-book-view="spread"] .prose h1,.layout-book[data-book-view="spread"] .prose h2,.layout-book[data-book-view="spread"] .prose h3{break-after:avoid-column}.layout-book[data-book-view="spread"] .prose pre,.layout-book[data-book-view="spread"] .prose table,.layout-book[data-book-view="spread"] .prose figure{break-inside:avoid-column;max-width:100%;overflow:auto}
.book-page-navigation{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:16px;width:min(900px,calc(100% - 28px));margin:18px auto 64px}.book-page-navigation[hidden]{display:none}.book-page-navigation>span{text-align:center;color:var(--muted);font-size:.82rem}.book-page-navigation button{min-width:132px;min-height:48px;padding:10px 16px;border:1px solid var(--border);background:var(--surface);color:var(--text);font:800 .8rem/1 var(--ui)}.book-page-navigation button:not(:disabled):hover{border-color:var(--accent);color:var(--accent)}.book-page-navigation button:disabled{opacity:.38;cursor:not-allowed}
.layout-book[data-book-view="scroll"] .article-layout{display:block;width:min(860px,calc(100% - 40px));margin:56px auto 100px;overflow:visible;filter:none}
.layout-book[data-book-view="scroll"] .prose{box-sizing:border-box;width:100%;max-width:none;height:auto;margin:0;padding:clamp(24px,var(--reader-page-margin,48px),72px);overflow:visible;columns:auto;column-count:initial;column-width:auto;column-gap:normal;background:var(--reader-paper,transparent);color:var(--reader-ink,var(--text))}
.layout-book[data-book-view="scroll"] .book-side-navigation{display:none}
@media(max-width:900px){.book-reader-chrome{position:relative;top:auto;width:min(100% - 32px,760px)}.book-settings{grid-template-columns:1fr 1fr}.book-toc{grid-template-columns:1fr}.layout-book[data-book-view="spread"] .article-layout{width:min(100% - 32px,760px);filter:drop-shadow(0 12px 18px rgba(0,20,40,.2))}.layout-book[data-book-view="spread"] .prose{height:calc(100dvh - 220px);min-height:520px;max-height:780px}.book-page-navigation>span{font-size:.72rem}}
@media(max-width:600px){.book-reader-chrome{width:min(100% - 24px,560px)}.book-reader-chrome .reading-layout-switch{display:grid;grid-template-columns:1fr 1fr;gap:7px}.reading-layout-switch span{grid-column:1/-1}.reading-layout-switch output{grid-column:1/-1;width:100%;padding:7px}.book-reader-panel{position:absolute;left:0;right:0;width:100%}.book-settings{grid-template-columns:1fr;padding:13px}.book-setting{grid-template-columns:62px 1fr 44px}.layout-book[data-book-view="spread"] .article-layout{width:calc(100% - 24px)}.layout-book[data-book-view="spread"] .prose{height:var(--book-mobile-page-height,max(600px,calc(100svh - 96px)));min-height:600px;max-height:none;padding:var(--reader-page-margin,24px);box-shadow:none}.book-page-navigation{position:sticky;bottom:8px;z-index:13;grid-template-columns:1fr auto 1fr;width:calc(100% - 24px);margin:10px auto 36px;padding:7px;border:1px solid var(--border);background:color-mix(in srgb,var(--surface) 94%,transparent);backdrop-filter:blur(12px)}.book-page-navigation>span{font-size:0;width:1px}.book-page-navigation>span::after{content:"滑动翻页";font-size:.68rem;white-space:nowrap}.book-page-navigation button{min-width:0}.book-page-navigation button span{display:none}}
@media(prefers-reduced-motion:reduce){.layout-book[data-book-view="spread"] .prose{scroll-behavior:auto}.book-reader-panel{backdrop-filter:none}}

/* Restrained arcade particles around the page edges; no central energy geometry. */
.book-arcade-transition{position:absolute;z-index:9;inset:0;overflow:hidden;pointer-events:none}.book-arcade-transition i{position:absolute;left:var(--particle-x);top:var(--particle-y);width:var(--particle-size);height:var(--particle-size);opacity:0;background:#b7ff35;box-shadow:0 0 4px rgba(120,255,47,.75),0 0 9px rgba(120,255,47,.34);will-change:transform,opacity;image-rendering:pixelated}.book-arcade-transition i:nth-child(3n){background:#9b5cff;box-shadow:0 0 4px rgba(129,72,255,.72),0 0 9px rgba(129,72,255,.3)}.book-arcade-transition i:nth-child(5n){background:#45eaff;box-shadow:0 0 4px rgba(39,204,255,.7),0 0 9px rgba(39,204,255,.28)}.book-arcade-transition.arcade-forward.is-active i{animation:arcade-pixel-burst var(--particle-duration,720ms) steps(9,end) var(--particle-delay) both}.book-arcade-transition.arcade-back.is-active i{animation:arcade-pixel-return var(--particle-duration,680ms) steps(9,end) var(--particle-delay) both}
@keyframes arcade-pixel-burst{0%{opacity:0;transform:translate(0) scale(.2)}22%{opacity:.9;transform:translate(0) scale(1)}100%{opacity:0;transform:translate(var(--particle-dx),var(--particle-dy)) scale(.1)}}
@keyframes arcade-pixel-return{0%{opacity:0;transform:translate(var(--particle-dx),var(--particle-dy)) scale(.1)}66%{opacity:.85;transform:translate(0) scale(1)}100%{opacity:0;transform:translate(0) scale(.2)}}
.layout-book[data-book-view="spread"] .article-layout.is-page-turning .prose{animation:book-page-crossfade 620ms ease-out both}@keyframes book-page-crossfade{0%{opacity:.12}100%{opacity:1}}
@media(prefers-reduced-motion:reduce){.book-arcade-transition{display:none}}

/* Desktop books use hover-revealed edge arrows; mobile keeps the compact control strip. */
.book-side-navigation{position:absolute;z-index:11;inset:0;pointer-events:none}.book-side-navigation button{position:absolute;top:0;bottom:0;width:78px;border:0;background:transparent;color:var(--text);opacity:0;pointer-events:auto;cursor:pointer;transition:opacity 140ms ease,color 140ms ease}.book-side-navigation button[data-book-page="prev"]{right:100%;margin-right:10px}.book-side-navigation button[data-book-page="next"]{left:100%;margin-left:10px}.book-side-navigation button span{display:grid;place-items:center;width:46px;height:46px;margin:auto;border:1px solid var(--border);border-radius:50%;background:color-mix(in srgb,var(--surface) 90%,transparent);box-shadow:0 8px 24px rgba(0,20,40,.2);font-size:1.45rem;backdrop-filter:blur(10px)}.book-side-navigation button:not(:disabled):hover,.book-side-navigation button:focus-visible{color:var(--accent);opacity:1}.book-side-navigation button:disabled{pointer-events:none}.layout-book[data-book-view="spread"] .article-layout:hover .book-side-navigation button:not(:disabled){opacity:.82}

/* The discussion is a separate destination below the reading surface. */
.layout-book .community{position:relative;isolation:isolate;margin-top:clamp(360px,52vh,720px);min-height:min(620px,72vh);padding-top:clamp(84px,10vh,128px);padding-bottom:clamp(72px,9vh,120px);border-color:color-mix(in srgb,var(--border) 72%,transparent);background:color-mix(in srgb,var(--surface) 50%,transparent);box-shadow:0 28px 72px rgba(0,20,40,.26),inset 0 1px rgba(255,255,255,.14);backdrop-filter:blur(24px) saturate(.9)}.layout-book .community::before{content:"";position:absolute;z-index:-2;inset:-120px -12vw;background:radial-gradient(ellipse at center,color-mix(in srgb,var(--canvas) 18%,transparent),transparent 68%);pointer-events:none}.layout-book .community::after{content:"DISCUSSION · 阅读之外";position:absolute;top:34px;left:clamp(24px,4vw,48px);color:var(--accent);font:800 .7rem/1 var(--ui);letter-spacing:.18em}.layout-book .community .comment-form textarea,.layout-book .community .comment-item,.layout-book .community .comment-empty,.layout-book .community .comment-login-prompt{border-color:color-mix(in srgb,var(--border) 72%,transparent);background:color-mix(in srgb,var(--canvas) 38%,transparent);backdrop-filter:blur(12px)}

@media(min-width:901px){.book-reader-chrome{width:min(1540px,calc(100% - clamp(180px,13vw,320px)))}.layout-book[data-book-view="spread"] .article-layout{width:min(1540px,calc(100% - clamp(180px,13vw,320px)))}.layout-book[data-book-view="spread"] .prose{height:clamp(640px,82dvh,960px)}.book-page-navigation{display:none!important}}
@media(max-width:900px){.book-side-navigation{display:none}.layout-book .community{margin-top:36vh;min-height:76vh}.book-page-navigation:not([hidden]){display:grid}}

/* Day reading borrows the backdrop's misty blue-white instead of exposed pure white. */
:root[data-theme="light"] .layout-book[data-reader-theme="theme"]{--reader-paper:#e4ebf0;--reader-ink:#263b49;--reader-chrome:#e1e9ef}
:root[data-theme="light"] .layout-book[data-reader-theme="theme"] .reading-layout-switch,:root[data-theme="light"] .layout-book[data-reader-theme="theme"] .book-reader-panel{background:color-mix(in srgb,var(--reader-chrome) 94%,transparent)}
:root[data-theme="light"] .layout-book[data-reader-theme="theme"] .reading-layout-switch button,:root[data-theme="light"] .layout-book[data-reader-theme="theme"] .book-setting-select select,:root[data-theme="light"] .layout-book[data-reader-theme="theme"] .book-settings>button{background:color-mix(in srgb,var(--reader-paper) 90%,#cddae3)}
:root[data-theme="light"] .layout-book[data-reader-theme="theme"] .reading-layout-switch button[aria-pressed="true"]{background:var(--reader-ink);color:var(--reader-paper)}
@media(prefers-color-scheme:light){:root:not([data-theme="dark"]) .layout-book[data-reader-theme="theme"]{--reader-paper:#e4ebf0;--reader-ink:#263b49;--reader-chrome:#e1e9ef}:root:not([data-theme="dark"]) .layout-book[data-reader-theme="theme"] .reading-layout-switch,:root:not([data-theme="dark"]) .layout-book[data-reader-theme="theme"] .book-reader-panel{background:color-mix(in srgb,var(--reader-chrome) 94%,transparent)}:root:not([data-theme="dark"]) .layout-book[data-reader-theme="theme"] .reading-layout-switch button,:root:not([data-theme="dark"]) .layout-book[data-reader-theme="theme"] .book-setting-select select,:root:not([data-theme="dark"]) .layout-book[data-reader-theme="theme"] .book-settings>button{background:color-mix(in srgb,var(--reader-paper) 90%,#cddae3)}}
@media(prefers-color-scheme:light){:root:not([data-theme="dark"]) .layout-book[data-reader-theme="theme"] .reading-layout-switch button[aria-pressed="true"]{background:var(--reader-ink);color:var(--reader-paper)}}

/* Day-mode reader chrome stays in the same cool mist palette for every paper preset. */
:root[data-theme="light"] .layout-book .reading-layout-switch,:root[data-theme="light"] .layout-book .book-reader-panel{background:color-mix(in srgb,#e1e9ef 92%,transparent)}
:root[data-theme="light"] .layout-book .reading-layout-switch button,:root[data-theme="light"] .layout-book .book-setting-select select,:root[data-theme="light"] .layout-book .book-settings>button{background:#dbe5eb;color:#263b49}
:root[data-theme="light"] .layout-book .reading-layout-switch button[aria-pressed="true"]{background:#263b49;color:#e7edf1}
@media(prefers-color-scheme:light){:root:not([data-theme="dark"]) .layout-book .reading-layout-switch,:root:not([data-theme="dark"]) .layout-book .book-reader-panel{background:color-mix(in srgb,#e1e9ef 92%,transparent)}:root:not([data-theme="dark"]) .layout-book .reading-layout-switch button,:root:not([data-theme="dark"]) .layout-book .book-setting-select select,:root:not([data-theme="dark"]) .layout-book .book-settings>button{background:#dbe5eb;color:#263b49}:root:not([data-theme="dark"]) .layout-book .reading-layout-switch button[aria-pressed="true"]{background:#263b49;color:#e7edf1}}

/* The spread keeps a clean central gutter without a decorative spine. */
.layout-book[data-book-view="spread"][data-book-resolved-pages="2"] .article-layout::after{display:block;top:26px;bottom:26px;width:2px;transform:translateX(-50%) rotate(.12deg);background:repeating-linear-gradient(to bottom,color-mix(in srgb,var(--reader-ink,var(--text)) 24%,transparent) 0 7px,transparent 7px 15px,color-mix(in srgb,var(--reader-ink,var(--text)) 15%,transparent) 15px 20px,transparent 20px 30px);box-shadow:none;filter:blur(.15px);opacity:.52}

/* Translucent glass-paper surface keeps the realm backdrop visible without hurting legibility. */
.layout-book[data-book-view="spread"] .prose{background:color-mix(in srgb,var(--reader-paper,var(--surface)) 76%,transparent);box-shadow:inset 0 1px rgba(255,255,255,.18),inset 0 0 38px rgba(0,20,40,.055);backdrop-filter:blur(18px) saturate(.82)}
.layout-book[data-book-view="spread"][data-book-resolved-pages="2"] .prose{background:color-mix(in srgb,var(--reader-paper,var(--surface)) 76%,transparent)}

html,body{overflow-x:clip}

/* Desktop spread columns are explicit; column-width alone may collapse to one wide column. */
.layout-book[data-book-view="spread"] .prose{column-count:var(--book-column-count,2);column-width:calc(var(--book-page-width,38ch) - 1px)}
@media(max-width:600px){.layout-book[data-book-view="spread"] .prose{column-count:auto}}

/* Mobile reading is an uncluttered single page with measured pagination. */
.book-page-navigation{display:none!important}
@media(max-width:600px){.layout-book[data-book-view="spread"] .prose{position:relative;overflow:hidden;scrollbar-width:none;clip-path:inset(0);contain:paint;columns:auto;column-width:auto;column-gap:normal;column-fill:auto;padding-bottom:calc(var(--reader-page-margin,24px) + 28px)}.layout-book[data-book-view="spread"] .prose::-webkit-scrollbar{display:none}.layout-book .book-mobile-measure{position:fixed!important;z-index:-1!important;left:-200vw!important;top:0!important;margin:0!important;visibility:hidden!important;pointer-events:none!important;contain:layout style!important}.book-mobile-folio{position:absolute;left:var(--reader-page-margin,24px);right:var(--reader-page-margin,24px);bottom:14px;display:flex;justify-content:space-between;align-items:center;padding-top:8px;border-top:1px dashed color-mix(in srgb,var(--reader-ink,var(--text)) 24%,transparent);color:color-mix(in srgb,var(--reader-ink,var(--text)) 68%,transparent);font:700 .68rem/1 var(--ui);letter-spacing:.08em;pointer-events:none}.book-reader-chrome{display:none;position:fixed;z-index:32;inset:auto 12px 12px;width:auto;max-height:calc(100dvh - 24px);margin:0;overflow:auto;border:1px solid var(--border);background:color-mix(in srgb,var(--surface) 78%,transparent);box-shadow:0 24px 70px rgba(0,20,40,.34);backdrop-filter:blur(22px)}.layout-book[data-book-mobile-controls="open"] .book-reader-chrome{display:block}.book-reader-chrome .reading-layout-switch{position:static}.book-reader-chrome .book-reader-panel{position:static;top:auto;width:100%;max-height:58dvh;margin-top:8px;overflow:auto;box-shadow:none}.book-reader-chrome .book-settings:not([hidden]){display:grid}}

/* The reader controls open from a dedicated gear outside the page frame. */
.layout-book .book-settings-anchor{z-index:40}.layout-book .book-settings-gear{position:relative;z-index:36}
.layout-book .article-layout{position:relative;margin-top:56px}.book-settings-anchor{position:absolute;z-index:24;top:-52px;right:0}.book-settings-gear{display:grid;place-items:center;width:44px;height:44px;padding:0;border:1px solid var(--border);border-radius:50%;background:color-mix(in srgb,var(--surface) 94%,transparent);color:var(--text);box-shadow:3px 3px 0 var(--shadow-color);cursor:pointer;touch-action:manipulation;backdrop-filter:blur(12px)}.book-settings-gear:hover,.book-settings-gear:focus-visible,.book-settings-gear[aria-expanded="true"]{border-color:var(--accent);color:var(--accent);transform:translate(-1px,-1px);box-shadow:5px 5px 0 var(--shadow-color)}.book-settings-gear svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}.book-settings-anchor .book-reader-chrome{display:none;position:absolute;z-index:34;inset:52px 0 auto auto;box-sizing:border-box;width:min(980px,calc(100vw - 24px));max-height:min(76dvh,720px);margin:0;padding:10px;overflow:auto;border:1px solid var(--border);background:color-mix(in srgb,var(--surface) 96%,transparent);box-shadow:0 24px 70px rgba(0,20,40,.34);backdrop-filter:blur(20px)}.layout-book[data-book-controls="open"] .book-settings-anchor .book-reader-chrome{display:block}.book-settings-anchor .book-reader-panel{position:static;top:auto;width:100%;max-height:none;margin-top:8px;overflow:auto;box-shadow:none}.book-mobile-folio{justify-content:center;font-variant-numeric:tabular-nums}
@media(max-width:600px){.layout-book .article-layout{margin-top:54px}.book-settings-anchor{top:-50px}.book-settings-anchor .book-reader-chrome{inset:50px 0 auto auto;width:min(560px,var(--book-controls-width,calc(100vw - 36px)));max-height:min(70svh,var(--book-controls-space,460px));overscroll-behavior:contain;touch-action:pan-y;-webkit-overflow-scrolling:touch;scrollbar-gutter:stable}.book-settings-anchor .book-settings:not([hidden]){display:grid}.book-settings-anchor .book-reader-panel{touch-action:pan-y}.book-settings-anchor .reading-layout-switch{display:grid;grid-template-columns:1fr 1fr;gap:7px}.book-settings-anchor .reading-layout-switch span,.book-settings-anchor .reading-layout-switch output{grid-column:1/-1}.book-progress-jump{grid-column:1/-1;display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:10px;min-height:52px;padding:10px 0;border-block:1px dashed var(--border)}.book-progress-jump label{font:700 .78rem/1.3 var(--ui);color:var(--muted)}.book-progress-jump input{width:100%;accent-color:var(--accent);touch-action:manipulation}.book-progress-jump output{min-width:54px;text-align:right;font:700 .72rem/1 var(--display);font-variant-numeric:tabular-nums}}

/* Compact statutory links sit quietly on two lines at the very bottom. */
.site-icp{display:flex;flex-direction:column;align-items:center;gap:2px;width:fit-content;max-width:calc(100% - 24px);margin:18px auto 0;padding:0 16px;overflow:visible;border:0;background:transparent;text-align:center}
.site-icp .beian-item{display:inline-flex;align-items:center;justify-content:center;min-width:0;padding:1px 6px;color:var(--muted);font:500 .65rem/1.55 var(--body);letter-spacing:.02em;text-decoration:none}
.site-icp .beian-item+.beian-item{border:0}
.beian-label{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.beian-value{display:inline-flex;align-items:center;justify-content:center;gap:5px;min-height:0;padding:0;overflow-wrap:anywhere}
.beian-badge{flex:0 0 auto;width:14px;height:15px;object-fit:contain}
.site-icp .beian-item:hover .beian-value{color:var(--accent)}