*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body,h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd,ul,ol,fieldset{margin:0}
ul,ol{list-style:none;padding:0}
a{color:inherit;text-decoration:none;background-color:transparent}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
img,svg,video{display:block;max-width:100%;height:auto}
input,textarea,select{font:inherit}
:focus-visible{outline:2px solid var(--c-gold);outline-offset:2px}
#main-content{outline:none}
:root{
--c-deep:#0A1A2F;
--c-royal:#16324F;
--c-gold:#C9A227;
--c-gold-bright:#E6C968;
--c-cinnabar:#A63A2B;
--c-cream:#F5F1E8;
--c-ink:#1E2A38;
--c-jade:#B8C4BE;
--c-stone:#D8CFC0;
--font-serif:"Noto Serif SC","Songti SC","STSong","SimSun",serif;
--font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
--font-mono:"SFMono-Regular","Cascadia Mono","Roboto Mono",Consolas,"Liberation Mono",monospace;
--fs-xs:0.75rem;
--fs-sm:0.875rem;
--fs-md:1rem;
--fs-lg:1.25rem;
--fs-xl:1.75rem;
--fs-2xl:2.75rem;
--space-1:0.25rem;
--space-2:0.5rem;
--space-3:0.875rem;
--space-4:1rem;
--space-5:1.5rem;
--space-6:2rem;
--space-7:3rem;
--space-8:5rem;
--max-width:1200px;
--pad-inline:clamp(1rem,3vw,2rem);
--dur-fast:120ms;
--dur-slow:160ms;
--ease:cubic-bezier(0.25,0.1,0.25,1)
}
html{background:var(--c-deep);scroll-behavior:auto}
body{
min-height:100vh;
display:flex;
flex-direction:column;
background:var(--c-cream);
color:var(--c-ink);
font-family:var(--font-sans);
font-size:var(--fs-md);
line-height:1.75;
-webkit-font-smoothing:antialiased;
text-rendering:optimizeLegibility
}
body::before{
content:"";
position:fixed;
inset:0;
z-index:0;
background-image:linear-gradient(rgba(10,26,47,0.03) 1px,transparent 1px),linear-gradient(90deg,rgba(10,26,47,0.03) 1px,transparent 1px);
background-size:32px 32px;
pointer-events:none
}
h1,h2,h3,h4{font-family:var(--font-serif);font-weight:700;line-height:1.3;letter-spacing:0.02em;color:var(--c-deep)}
h1{font-size:var(--fs-2xl)}
h2{font-size:var(--fs-xl)}
h3{font-size:var(--fs-lg)}
h4{font-size:var(--fs-md)}
#main-content{flex:1 0 auto;width:100%}
.skip-link{
position:absolute;
left:-9999px;
top:0;
z-index:1000;
display:inline-flex;
align-items:center;
padding:0.625rem 1rem;
background:var(--c-gold);
color:var(--c-deep);
font-weight:700;
font-size:var(--fs-sm);
line-height:1.4;
transition:left 0s
}
.skip-link:focus{left:0;outline:2px solid var(--c-cream);outline-offset:0}
.u-sr-only{position:absolute;width:1px;height:1px;margin:-1px;padding:0;border:0;clip:rect(0 0 0 0);clip-path:inset(50%);overflow:hidden;white-space:nowrap}
.site-header{position:relative;flex-shrink:0;background:var(--c-deep);color:var(--c-cream)}
.site-header__topbar{height:3px;background:linear-gradient(90deg,var(--c-cinnabar) 0,var(--c-cinnabar) 20%,var(--c-gold) 20%,var(--c-gold) 100%)}
.masthead{
max-width:var(--max-width);
margin-inline:auto;
padding:1.25rem var(--pad-inline) 0.75rem
}
.masthead__row{
display:flex;
align-items:center;
justify-content:space-between;
gap:1rem
}
.masthead__brand{display:block;flex:0 1 auto}
.masthead__name{
display:block;
font-family:var(--font-mono);
font-size:0.6875rem;
font-weight:600;
letter-spacing:0.32em;
color:var(--c-gold);
margin-bottom:0.3rem;
line-height:1.4;
text-transform:uppercase
}
.masthead__name::before{
content:"";
display:inline-block;
width:0.375rem;
height:0.375rem;
background:var(--c-gold);
transform:rotate(45deg);
margin-right:0.625rem;
vertical-align:middle
}
.masthead__title{
display:block;
font-family:var(--font-serif);
font-size:clamp(1.375rem,5vw,2.5rem);
font-weight:700;
line-height:1.2;
letter-spacing:0.06em;
color:var(--c-cream)
}
.masthead__icp{
flex-shrink:0;
font-family:var(--font-mono);
font-size:0.625rem;
font-weight:500;
letter-spacing:0.08em;
color:var(--c-jade);
border:1px solid rgba(201,162,39,0.35);
background:rgba(10,26,47,0.4);
padding:0.3rem 0.55rem;
line-height:1.5;
white-space:nowrap
}
.masthead__tagline{
margin-top:0.75rem;
padding-top:0.625rem;
border-top:1px solid rgba(201,162,39,0.25);
font-family:var(--font-mono);
font-size:0.625rem;
letter-spacing:0.08em;
line-height:1.8;
color:var(--c-jade);
max-width:76ch
}
.nav-primary{
position:relative;
display:flex;
align-items:center;
background:var(--c-royal);
border-top:1px solid rgba(201,162,39,0.35)
}
.nav-primary__inner{
display:none;
position:absolute;
top:100%;
left:0;
right:0;
flex-direction:column;
background:var(--c-deep);
border-bottom:3px solid var(--c-gold);
padding:0.5rem 0;
box-shadow:0 4px 16px rgba(10,26,47,0.18)
}
.nav-primary[data-open] .nav-primary__inner{display:flex}
.nav-primary__link{
position:relative;
display:block;
padding:0.75rem 1.25rem;
font-size:var(--fs-sm);
font-weight:500;
letter-spacing:0.1em;
color:rgba(245,241,232,0.92);
border-bottom:1px solid rgba(245,241,232,0.08);
transition:color var(--dur-fast) var(--ease),background-color var(--dur-fast) var(--ease)
}
.nav-primary__link:last-child{border-bottom:0}
.nav-primary__link:hover{color:var(--c-gold-bright);background:rgba(10,26,47,0.5)}
.nav-primary__link[aria-current="page"]{
color:var(--c-gold-bright);
background:rgba(10,26,47,0.35)
}
.nav-primary__link[aria-current="page"]::before{
content:"";
position:absolute;
left:0;
top:0.35rem;
bottom:0.35rem;
width:3px;
background:var(--c-gold)
}
.nav-toggle{
display:flex;
flex-direction:column;
justify-content:center;
gap:5px;
width:48px;
height:48px;
padding:12px 10px;
margin-left:auto;
flex-shrink:0
}
.nav-toggle__bar{
display:block;
height:2px;
background:var(--c-cream);
transition:transform var(--dur-slow) var(--ease),opacity var(--dur-slow) var(--ease)
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:first-child{transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.site-footer{
position:relative;
flex-shrink:0;
background:var(--c-deep);
color:var(--c-cream);
border-top:3px solid var(--c-gold)
}
.site-footer__stripe{
height:8px;
background:repeating-linear-gradient(-45deg,var(--c-gold) 0,var(--c-gold) 4px,var(--c-deep) 4px,var(--c-deep) 12px);
opacity:0.55;
border-bottom:2px solid var(--c-cinnabar)
}
.site-footer__main{
max-width:var(--max-width);
margin-inline:auto;
padding:var(--space-7) var(--pad-inline) var(--space-6);
display:grid;
grid-template-columns:1.4fr 1fr 1fr 1.2fr;
gap:var(--space-7)
}
.site-footer__brand{font-family:var(--font-serif);font-size:var(--fs-lg);font-weight:700;color:var(--c-gold-bright);letter-spacing:0.08em}
.site-footer__title{margin-top:0.25rem;font-size:var(--fs-md);color:var(--c-cream);font-weight:600;letter-spacing:0.04em}
.site-footer__trust{
margin-top:0.875rem;
font-size:var(--fs-sm);
line-height:1.7;
color:var(--c-jade);
max-width:30ch;
border-left:2px solid var(--c-cinnabar);
padding-left:0.75rem
}
.site-footer__heading{
font-family:var(--font-serif);
font-size:var(--fs-sm);
font-weight:600;
letter-spacing:0.14em;
color:var(--c-gold);
border-bottom:1px solid rgba(201,162,39,0.3);
padding-bottom:0.5rem;
margin-bottom:0.75rem
}
.site-footer__list{display:grid;gap:0.5rem}
.site-footer__list a{
font-size:var(--fs-sm);
color:var(--c-cream);
transition:color var(--dur-fast) var(--ease)
}
.site-footer__list a:hover{color:var(--c-gold-bright)}
.site-footer__list li{
font-size:var(--fs-sm);
color:var(--c-stone);
line-height:1.7
}
.site-footer__label{
display:inline-block;
min-width:3ch;
font-size:var(--fs-xs);
letter-spacing:0.1em;
color:var(--c-gold);
margin-right:0.5rem
}
.site-footer__bottom{
max-width:var(--max-width);
margin-inline:auto;
padding:var(--space-4) var(--pad-inline) var(--space-5);
display:flex;
flex-wrap:wrap;
align-items:center;
justify-content:space-between;
gap:var(--space-3) var(--space-5);
border-top:1px solid rgba(184,196,190,0.2)
}
.site-footer__icp{font-family:var(--font-mono);font-size:var(--fs-xs);color:var(--c-jade);letter-spacing:0.02em}
.site-footer__year{font-size:var(--fs-xs);color:var(--c-jade)}
.site-footer__note{font-size:var(--fs-xs);color:var(--c-stone)}
.to-top{
position:fixed;
right:1.5rem;
bottom:1.5rem;
z-index:90;
display:inline-flex;
align-items:center;
justify-content:center;
width:48px;
height:48px;
background:var(--c-deep);
color:var(--c-gold-bright);
border:1px solid var(--c-gold);
font-size:1.25rem;
line-height:1;
opacity:0;
visibility:hidden;
transform:translateY(8px);
transition:opacity var(--dur-slow) var(--ease),transform var(--dur-slow) var(--ease),visibility var(--dur-slow) var(--ease)
}
.to-top.is-visible{opacity:0.9;visibility:visible;transform:translateY(0)}
.to-top:hover{opacity:1;background:var(--c-royal)}
.container{width:100%;max-width:var(--max-width);margin-inline:auto;padding-inline:var(--pad-inline)}
.container--narrow{max-width:760px}
.grid{display:grid;gap:var(--space-5)}
.grid--2,.grid--3,.grid--ed,.grid--aside{grid-template-columns:1fr}
@media (min-width:640px){
.grid--2{grid-template-columns:repeat(2,1fr);gap:var(--space-6)}
}
@media (min-width:900px){
.grid--3{grid-template-columns:repeat(3,1fr);gap:var(--space-6)}
.grid--ed{grid-template-columns:minmax(220px,0.8fr) minmax(0,2.2fr);gap:var(--space-7)}
.grid--aside{grid-template-columns:minmax(0,2fr) minmax(240px,1fr);gap:var(--space-7)}
}
.btn{
display:inline-flex;
align-items:center;
justify-content:center;
gap:0.5rem;
padding:0.75rem 1.5rem;
font-family:var(--font-sans);
font-size:var(--fs-sm);
font-weight:600;
letter-spacing:0.08em;
line-height:1.5;
border:1px solid transparent;
text-align:center;
transition:background-color var(--dur-fast) var(--ease),border-color var(--dur-fast) var(--ease),color var(--dur-fast) var(--ease)
}
.btn--gold{background:var(--c-gold);color:var(--c-deep);border-color:var(--c-gold)}
.btn--gold:hover{background:var(--c-gold-bright);border-color:var(--c-gold-bright)}
.btn--outline{background:transparent;color:var(--c-gold-bright);border-color:var(--c-gold)}
.btn--outline:hover{background:rgba(201,162,39,0.12)}
.btn--ghost{background:transparent;color:var(--c-cream);border-color:rgba(245,241,232,0.4)}
.btn--ghost:hover{border-color:var(--c-cream)}
.breadcrumb{
display:flex;
flex-wrap:wrap;
align-items:center;
gap:0.5rem;
font-family:var(--font-mono);
font-size:var(--fs-sm);
letter-spacing:0.04em;
color:var(--c-royal);
padding:var(--space-4) 0
}
.breadcrumb a{
color:var(--c-royal);
border-bottom:1px solid transparent;
transition:color var(--dur-fast) var(--ease),border-color var(--dur-fast) var(--ease)
}
.breadcrumb a:hover{color:var(--c-cinnabar);border-bottom-color:var(--c-cinnabar)}
.breadcrumb__sep{color:var(--c-gold);font-weight:700}
.breadcrumb [aria-current="page"]{color:var(--c-ink);font-weight:600;border-bottom:0}
.label-tag{
display:inline-flex;
align-items:center;
gap:0.6rem;
font-family:var(--font-sans);
font-size:var(--fs-xs);
font-weight:600;
letter-spacing:0.22em;
line-height:1.4;
color:var(--c-gold);
border-left:3px solid var(--c-gold);
padding-left:0.75rem;
text-transform:uppercase
}
.label-tag--cinnabar{color:var(--c-cinnabar);border-left-color:var(--c-cinnabar)}
.section-title{
font-family:var(--font-serif);
font-size:var(--fs-xl);
font-weight:700;
line-height:1.25;
letter-spacing:0.02em;
color:var(--c-deep);
margin-bottom:var(--space-5)
}
.section-title::after{
content:"";
display:block;
width:3rem;
height:3px;
background:var(--c-gold);
margin-top:var(--space-3)
}
.divider{border:0;height:1px;background:var(--c-stone);margin:var(--space-7) 0}
.divider--gold{height:2px;background:linear-gradient(90deg,var(--c-gold),transparent)}
.img-frame{
position:relative;
aspect-ratio:16 / 9;
overflow:hidden;
background-color:var(--c-stone);
background-image:linear-gradient(45deg,rgba(184,196,190,0.35) 25%,transparent 25%),linear-gradient(-45deg,rgba(184,196,190,0.35) 25%,transparent 25%),linear-gradient(45deg,transparent 75%,rgba(184,196,190,0.35) 75%),linear-gradient(-45deg,transparent 75%,rgba(184,196,190,0.35) 75%);
background-size:20px 20px;
background-position:0 0,0 10px,10px -10px,-10px 0
}
.img-frame::after{
content:"弈";
position:absolute;
inset:0;
display:flex;
align-items:center;
justify-content:center;
font-family:var(--font-serif);
font-size:1.5rem;
color:var(--c-royal);
opacity:0.28;
pointer-events:none
}
.img-frame img{position:relative;z-index:1;width:100%;height:100%;object-fit:cover}
.prose{max-width:72ch}
.prose>p+p{margin-top:1em}
.prose a{
color:var(--c-royal);
text-decoration:underline;
text-decoration-color:var(--c-gold);
text-decoration-thickness:1px;
text-underline-offset:4px;
transition:color var(--dur-fast) var(--ease),text-decoration-color var(--dur-fast) var(--ease)
}
.prose a:hover{color:var(--c-cinnabar);text-decoration-color:var(--c-cinnabar)}
.prose ul,.prose ol{padding-left:1.5rem;margin:1em 0}
.prose ul{list-style:square}
.prose ol{list-style:decimal}
.prose li+li{margin-top:0.4em}
.prose h2{margin-top:2.5em;margin-bottom:0.75em}
.prose h3{margin-top:2em;margin-bottom:0.5em}
.prose blockquote{
margin:1.5em 0;
padding:0.5em 1.25em;
border-left:3px solid var(--c-gold);
background:rgba(216,207,192,0.25);
font-family:var(--font-serif);
font-size:var(--fs-lg);
font-style:italic;
color:var(--c-ink)
}
.js-enabled [data-reveal]{
opacity:0;
transform:translateY(16px);
transition:opacity var(--dur-slow) var(--ease),transform var(--dur-slow) var(--ease)
}
.js-enabled [data-reveal].is-visible{
opacity:1;
transform:translateY(0)
}
@media (max-width:899px){
.site-footer__main{grid-template-columns:1fr 1fr;gap:var(--space-6)}
.site-footer__brandcol{grid-column:1 / -1}
}
@media (max-width:640px){
.site-footer__main{grid-template-columns:1fr;gap:var(--space-5);padding-top:var(--space-6)}
.site-footer__bottom{flex-direction:column;align-items:flex-start}
.masthead__icp{font-size:0.5625rem;padding:0.25rem 0.4rem}
}
@media (min-width:921px){
.masthead{padding-top:2rem;padding-bottom:1rem}
.masthead__title{font-size:clamp(2rem,4vw,2.75rem)}
.nav-toggle{display:none}
.nav-primary__inner{
display:flex;
position:static;
width:100%;
max-width:var(--max-width);
flex-direction:row;
justify-content:center;
gap:0.25rem;
margin-inline:auto;
padding-inline:var(--pad-inline)
}
.nav-primary[data-open] .nav-primary__inner{display:flex}
.nav-primary__link{
border-bottom:0;
padding:0.75rem 1.1rem
}
.nav-primary__link:hover{background:none;color:var(--c-gold-bright)}
.nav-primary__link[aria-current="page"]{background:none}
.nav-primary__link[aria-current="page"]::before{top:0.35rem;bottom:0.35rem}
}
@media (prefers-reduced-motion:reduce){
*,
*::before,
*::after{
animation-duration:0.01ms !important;
animation-iteration-count:1 !important;
transition-duration:0.01ms !important;
scroll-behavior:auto !important
}
.js-enabled [data-reveal],.js-enabled [data-reveal].is-visible{
opacity:1;
transform:none;
transition:none
}
.to-top,.to-top.is-visible{transition:none;opacity:1}
}