*,*::before,*::after{box-sizing:border-box}

:root{
--ink:#0B1412;
--ink-2:#15231F;
--mist:#8FB8AE;
--mist-deep:#4E7C74;
--gold:#C9A24B;
--gold-hi:#E6C87A;
--silver:#E9EDE7;
--indigo:#3C6E9F;
--paper:#E4DAC6;
--neon:#E4693F;
--rail-w:88px;
--topbar-h:58px;
--gutter:20px;
--page-max:1440px;
--shadow-hard:6px 6px 0 rgba(0,0,0,.6);
--shadow-gold:6px 6px 0 rgba(201,162,75,.26);
--font-display:"Songti SC","STSong","Source Han Serif SC","Noto Serif CJK SC","SimSun",serif;
--font-body:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans CJK SC","Microsoft YaHei",sans-serif;
--font-mono:ui-monospace,"SFMono-Regular","JetBrains Mono","Cascadia Mono",Menlo,Consolas,monospace;
--ease:cubic-bezier(.22,.61,.36,1);
--dur:180ms;
}

[hidden]{display:none !important}

html{
-webkit-text-size-adjust:100%;
scroll-behavior:smooth;
scroll-padding-top:calc(var(--topbar-h) + 16px);
background:var(--ink);
}

body{
margin:0;
min-height:100vh;
padding-top:var(--topbar-h);
background:var(--ink);
color:var(--silver);
font-family:var(--font-body);
font-size:16px;
font-weight:300;
line-height:1.9;
letter-spacing:.01em;
overflow-x:hidden;
}

body.is-locked{overflow:hidden}

body::after{
content:"";
position:fixed;
inset:0;
z-index:9990;
pointer-events:none;
opacity:.05;
background-image:
repeating-linear-gradient(0deg,rgba(233,237,231,.6) 0 1px,rgba(0,0,0,0) 1px 3px),
repeating-linear-gradient(90deg,rgba(143,184,174,.42) 0 1px,rgba(0,0,0,0) 1px 4px);
}

h1,h2,h3,h4{
margin:0 0 .55em;
font-family:var(--font-display);
font-weight:900;
line-height:1.06;
letter-spacing:-.02em;
color:var(--silver);
}

h1{font-size:clamp(38px,7vw,120px)}
h2{font-size:clamp(28px,4vw,64px)}
h3{font-size:clamp(20px,2.4vw,36px)}
h4{font-size:18px;letter-spacing:.02em}

p{margin:0 0 1.2em;max-width:70ch}
ul,ol{margin:0 0 1.2em;padding-left:1.2em}
img{display:block;max-width:100%;height:auto}
a{color:var(--mist);text-decoration:none;transition:color var(--dur) var(--ease)}
a:hover{color:var(--gold-hi)}
strong{font-weight:600;color:var(--gold-hi)}
hr{border:0}

::selection{background:var(--gold);color:var(--ink)}

:focus-visible{outline:2px solid var(--gold-hi);outline-offset:3px}

#main-content{
display:block;
scroll-margin-top:calc(var(--topbar-h) + 16px);
}

.sr-only{
position:absolute !important;
width:1px;height:1px;
padding:0;margin:-1px;
overflow:hidden;
clip:rect(0 0 0 0);
white-space:nowrap;
border:0;
}

/* ---------- 页眉 ---------- */
.site-header{position:relative;z-index:800}

.skip-link{
position:fixed;
top:8px;left:50%;
transform:translate(-50%,-180%);
z-index:9995;
padding:10px 20px;
background:var(--gold);
color:#141008;
border:2px solid #8C6F26;
font-size:14px;
font-weight:600;
letter-spacing:.06em;
text-decoration:none;
transition:transform var(--dur) var(--ease);
}
.skip-link:focus{transform:translate(-50%,0);color:#141008}

.topbar{
position:fixed;
top:0;left:0;right:0;
height:var(--topbar-h);
display:flex;
align-items:center;
gap:10px;
padding:0 14px;
background:var(--ink-2);
border-bottom:2px solid var(--mist-deep);
z-index:900;
}

.topbar__brand{
margin-right:auto;
font-family:var(--font-display);
font-weight:900;
font-size:18px;
letter-spacing:.12em;
color:var(--silver);
}
.topbar__brand:hover{color:var(--gold-hi)}

.nav-toggle{
display:inline-flex;
flex-direction:column;
align-items:center;
justify-content:center;
width:46px;height:40px;
padding:0;
background:transparent;
border:2px solid var(--mist-deep);
color:var(--mist);
cursor:pointer;
transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.nav-toggle:hover{color:var(--gold-hi);border-color:var(--gold)}
.nav-toggle__bars{
display:block;
position:relative;
width:18px;height:2px;
background:currentColor;
box-shadow:0 -6px 0 currentColor,0 6px 0 currentColor;
transition:background-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.nav-toggle[aria-expanded="true"]{color:var(--gold);border-color:var(--gold)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent;box-shadow:none}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before,
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{
content:"";
position:absolute;left:0;top:0;
width:18px;height:2px;
background:currentColor;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:rotate(-45deg)}

.rail{
position:fixed;
top:0;left:0;bottom:0;
width:var(--rail-w);
z-index:860;
display:flex;
flex-direction:column;
align-items:center;
gap:16px;
padding:22px 0 18px;
background:var(--ink-2);
border-right:2px solid var(--mist-deep);
overflow:hidden auto;
transition:transform 260ms var(--ease);
}

.rail__head{
display:flex;
align-items:flex-start;
justify-content:center;
gap:10px;
width:100%;
padding-bottom:14px;
border-bottom:2px solid var(--mist-deep);
}

.rail__brand{
writing-mode:vertical-rl;
font-family:var(--font-display);
font-weight:900;
font-size:22px;
letter-spacing:.24em;
color:var(--silver);
text-decoration:none;
}
.rail__brand:hover{color:var(--gold-hi)}

.rail__tagline{
writing-mode:vertical-rl;
font-size:11px;
letter-spacing:.3em;
color:var(--mist-deep);
}

.rail__index{
margin:0;
width:100%;
font-family:var(--font-mono);
font-size:11px;
letter-spacing:.04em;
color:var(--gold);
text-align:center;
}

.rail__num{color:var(--gold-hi)}

.rail__list{
list-style:none;
margin:0;
padding:0;
width:100%;
display:flex;
flex-direction:column;
}

.rail__item{margin:0}

.rail__link{
position:relative;
display:block;
padding:11px 6px;
text-align:center;
font-size:12.5px;
letter-spacing:.06em;
color:var(--mist);
text-decoration:none;
transition:color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.rail__link::before{
content:"";
position:absolute;
left:0;top:6px;bottom:6px;
width:3px;
background:var(--gold);
transform:scaleY(0);
transform-origin:top;
transition:transform 200ms var(--ease);
}
.rail__link:hover{color:var(--gold-hi);background:rgba(143,184,174,.07)}
.rail__link[aria-current="page"]{color:var(--gold);background:rgba(201,162,75,.1)}
.rail__link[aria-current="page"]::before{transform:scaleY(1)}

.rail__foot{
margin-top:auto;
width:100%;
padding:14px 10px 2px;
border-top:2px solid var(--mist-deep);
display:flex;
flex-direction:column;
gap:8px;
}

.rail__action{
display:flex;
align-items:center;
justify-content:center;
width:100%;
min-height:38px;
padding:0 4px;
font-family:var(--font-body);
font-size:12px;
letter-spacing:.02em;
color:var(--mist);
background:transparent;
border:2px solid var(--mist-deep);
cursor:pointer;
text-decoration:none;
transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.rail__action:hover{color:var(--gold-hi);border-color:var(--gold)}
.rail__action--gold,
.rail__action--gold:visited{
background:linear-gradient(135deg,#C9A24B 0%,#E6C87A 55%,#B98F35 100%);
color:#141008;
border-color:#8C6F26;
font-weight:600;
}
.rail__action--gold:hover{color:#141008;box-shadow:0 0 16px rgba(230,200,122,.5)}

.rail__progress{
position:absolute;
top:0;right:0;bottom:0;
width:2px;
background:rgba(78,124,116,.25);
}
.rail__progress-fill{
display:block;
width:100%;
height:0;
background:linear-gradient(180deg,var(--gold-hi),var(--gold));
}

.drawer-scrim{
position:fixed;
inset:0;
z-index:845;
border:0;
padding:0;
background:rgba(4,10,9,.74);
}

/* ---------- 检索面板 ---------- */
.search-sheet{
position:fixed;
top:0;bottom:0;
left:var(--rail-w);
width:min(420px,42vw);
z-index:870;
padding:28px 26px 36px;
background:var(--ink-2);
border-right:2px solid var(--gold);
box-shadow:var(--shadow-hard);
overflow-y:auto;
transform:translateX(-18px);
opacity:0;
visibility:hidden;
transition:opacity var(--dur) var(--ease),transform 220ms var(--ease),visibility 220ms linear;
}
.search-sheet[data-open]{transform:none;opacity:1;visibility:visible}

.search-sheet__head{
display:flex;
align-items:center;
justify-content:space-between;
gap:12px;
margin-bottom:6px;
}
.search-sheet__head .index-label{margin:0}

.search-sheet__close{
min-height:34px;
padding:0 12px;
font-family:var(--font-mono);
font-size:12px;
letter-spacing:.08em;
color:var(--mist);
background:transparent;
border:2px solid var(--mist-deep);
cursor:pointer;
transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.search-sheet__close:hover{color:var(--gold-hi);border-color:var(--gold)}

.search-sheet__input{
width:100%;
margin:14px 0 12px;
padding:12px 14px;
font-family:var(--font-body);
font-size:16px;
color:var(--silver);
background:var(--ink);
border:2px solid var(--mist-deep);
border-radius:0;
transition:border-color var(--dur) var(--ease);
}
.search-sheet__input::placeholder{color:rgba(143,184,174,.55)}
.search-sheet__input:focus{border-color:var(--gold);outline:none}

.search-sheet__scopes{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:4px}

.search-sheet__results{
list-style:none;
margin:18px 0 0;
padding:0;
}

.search-sheet__empty{
margin:16px 0 0;
font-size:13px;
line-height:1.8;
color:var(--mist-deep);
}

.search-result{border-top:1px dashed var(--mist-deep)}
.search-result a{
display:block;
padding:12px 2px;
text-decoration:none;
}
.search-result__label{
display:block;
font-size:15px;
color:var(--silver);
transition:color var(--dur) var(--ease);
}
.search-result__meta{
display:block;
margin-top:4px;
font-family:var(--font-mono);
font-size:11px;
letter-spacing:.08em;
color:var(--mist-deep);
}
.search-result a:hover .search-result__label{color:var(--gold-hi)}

/* ---------- 页脚 ---------- */
.site-footer{
position:relative;
z-index:1;
background:var(--ink-2);
color:var(--silver);
border-top:2px solid var(--mist-deep);
}

.site-footer__inner{
max-width:var(--page-max);
margin:0 auto;
padding:52px var(--gutter) 0;
display:grid;
grid-template-columns:1fr;
gap:36px;
}

.site-footer__brandline{
margin:0 0 8px;
font-family:var(--font-display);
font-weight:900;
font-size:24px;
letter-spacing:.02em;
color:var(--silver);
}
.site-footer__note{
margin:0 0 14px;
font-family:var(--font-mono);
font-size:12px;
letter-spacing:.18em;
color:var(--gold);
}
.site-footer__blurb{
margin:0;
font-size:14px;
line-height:1.9;
color:var(--mist);
max-width:30ch;
}

.footer-group{min-width:0}
.footer-group__title{
margin:0 0 14px;
font-family:var(--font-mono);
font-size:12px;
font-weight:400;
letter-spacing:.22em;
color:var(--gold);
}
.footer-group__list{
list-style:none;
margin:0;
padding:0;
display:flex;
flex-direction:column;
gap:10px;
}
.footer-group__link{
display:inline-flex;
align-items:center;
gap:8px;
font-size:14px;
color:var(--mist);
text-decoration:none;
}
.footer-group__link::before{
content:"";
width:6px;height:2px;
background:var(--mist-deep);
transition:width var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.footer-group__link:hover{color:var(--gold-hi)}
.footer-group__link:hover::before{width:16px;background:var(--gold)}

.site-footer__bottom{
margin-top:48px;
background:var(--ink);
border-top:2px solid var(--mist-deep);
}

.site-footer__bottominner{
max-width:var(--page-max);
margin:0 auto;
padding:24px var(--gutter) 34px;
display:flex;
flex-wrap:wrap;
align-items:center;
gap:18px 28px;
}

.site-footer__meta{flex:1 1 340px;min-width:240px}
.site-footer__legal{
margin:0 0 8px;
font-family:var(--font-mono);
font-size:12px;
letter-spacing:.06em;
color:var(--gold);
}
.site-footer__contact{
margin:0 0 6px;
font-size:13px;
line-height:1.9;
color:var(--mist);
max-width:60ch;
}
.site-footer__address{
margin:0;
font-size:13px;
line-height:1.9;
color:var(--mist-deep);
}

.site-footer__shortcuts{
display:flex;
flex-wrap:wrap;
gap:10px;
margin-left:auto;
}

/* ---------- 通用组件 ---------- */
.page-shell{
max-width:var(--page-max);
margin:0 auto;
padding:34px var(--gutter) 88px;
}

.index-label{
margin:0 0 12px;
font-family:var(--font-mono);
font-size:12px;
letter-spacing:.22em;
color:var(--gold);
}

.lede{
font-size:18px;
line-height:1.95;
color:var(--mist);
max-width:64ch;
}

.bento-grid{
display:grid;
grid-template-columns:repeat(12,minmax(0,1fr));
gap:20px;
}
.bento-grid > .col-4,
.bento-grid > .col-6,
.bento-grid > .col-8,
.bento-grid > .col-12{grid-column:span 12}

.card{
position:relative;
padding:24px;
background:var(--ink-2);
border:2px solid var(--mist-deep);
box-shadow:var(--shadow-hard);
color:var(--silver);
transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.card:hover{transform:translateY(-2px);border-color:var(--gold);box-shadow:var(--shadow-gold)}
.card--action:hover{transform:scale(1.02)}
.card__index{
margin:0 0 14px;
font-family:var(--font-mono);
font-size:12px;
letter-spacing:.2em;
color:var(--gold);
}
.card__title{
margin:0 0 10px;
font-size:clamp(20px,2.2vw,30px);
color:var(--silver);
}
.card__body{
margin:0;
font-size:15px;
line-height:1.95;
color:var(--mist);
}
.card__foot{
margin-top:18px;
padding-top:14px;
border-top:1px dashed var(--mist-deep);
font-size:13px;
color:var(--mist-deep);
}

.btn{
display:inline-flex;
align-items:center;
justify-content:center;
gap:8px;
min-height:44px;
padding:0 20px;
font-family:var(--font-body);
font-size:14px;
font-weight:500;
letter-spacing:.06em;
color:var(--silver);
background:var(--ink-2);
border:2px solid var(--mist-deep);
border-radius:0;
cursor:pointer;
text-decoration:none;
transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.btn:hover{color:var(--gold-hi);border-color:var(--gold)}
.btn--gold,
.btn--gold:visited{
background:linear-gradient(135deg,#C9A24B 0%,#E6C87A 52%,#B98F35 100%);
color:#141008;
border-color:#8C6F26;
font-weight:600;
}
.btn--gold:hover{color:#141008;box-shadow:0 0 0 1px rgba(230,200,122,.7),0 0 18px rgba(230,200,122,.45)}
.btn--ghost{background:transparent;border-color:var(--mist-deep);color:var(--mist)}
.btn--sm{min-height:36px;padding:0 14px;font-size:13px}
.btn--block{width:100%}

.chip{
display:inline-flex;
align-items:center;
min-height:32px;
padding:0 12px;
font-family:var(--font-body);
font-size:12.5px;
letter-spacing:.06em;
color:var(--mist);
background:transparent;
border:2px solid var(--mist-deep);
cursor:pointer;
transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.chip:hover{color:var(--gold-hi);border-color:var(--gold)}
.chip[aria-pressed="true"]{color:#141008;background:var(--gold);border-color:var(--gold-hi)}

.tag{
display:inline-block;
padding:3px 9px;
font-family:var(--font-mono);
font-size:12px;
letter-spacing:.1em;
color:var(--mist);
border:1px solid var(--mist-deep);
}
.tag--gold{color:var(--gold);border-color:var(--gold)}
.tag--indigo{color:#8AB6DE;border-color:var(--indigo)}

.breadcrumb{
font-family:var(--font-mono);
font-size:12px;
letter-spacing:.08em;
color:var(--mist-deep);
}
.breadcrumb ol{
display:flex;
flex-wrap:wrap;
gap:6px;
list-style:none;
margin:0;
padding:0;
}
.breadcrumb li+li::before{content:"／";margin-right:6px;color:var(--mist-deep)}
.breadcrumb a{color:var(--mist)}

.divider{
border:0;
border-top:2px dashed var(--mist-deep);
margin:40px 0;
}

.surface-ink{
background:var(--ink-2);
border-top:2px solid var(--mist-deep);
border-bottom:2px solid var(--mist-deep);
padding:56px 0;
}

.surface-paper{
background:var(--paper);
color:#181410;
border-top:2px solid var(--mist-deep);
border-bottom:2px solid var(--mist-deep);
padding:56px 0;
}
.surface-paper h1,
.surface-paper h2,
.surface-paper h3,
.surface-paper h4{color:#141210}
.surface-paper p{color:#3A3227}
.surface-paper .lede{color:#4A4033}
.surface-paper a{color:#2F5C7A;text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
.surface-paper a:hover{color:#8C6F26}
.surface-paper .index-label{color:#8C6F26}
.surface-paper .card{background:#F1E9D9;border-color:#C3B79C;color:#181410}
.surface-paper .card__title{color:#141210}
.surface-paper .card__body{color:#4A4033}

.media-frame{
position:relative;
overflow:hidden;
background:var(--ink-2);
border:2px solid var(--mist-deep);
box-shadow:var(--shadow-hard);
}
.media-frame > img,
.media-frame > .media-frame__img{
width:100%;
height:100%;
object-fit:cover;
}
.media-frame::after{
content:"";
position:absolute;
inset:0;
pointer-events:none;
opacity:.07;
background-image:
repeating-linear-gradient(0deg,rgba(233,237,231,.5) 0 1px,rgba(0,0,0,0) 1px 3px),
repeating-linear-gradient(90deg,rgba(201,162,75,.35) 0 1px,rgba(0,0,0,0) 1px 5px);
}
.media-frame--wide{aspect-ratio:16/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}
.media-frame--panorama{aspect-ratio:21/9}
.media-frame__slice{
position:absolute;
left:16px;right:16px;bottom:16px;
z-index:2;
padding:14px 16px;
font-size:13px;
line-height:1.8;
color:var(--silver);
background:rgba(11,20,18,.78);
border:2px solid var(--mist-deep);
}

/* ---------- 显现 ---------- */
html.js [data-reveal]{
opacity:0;
transform:translateY(24px);
transition:opacity 320ms var(--ease),transform 320ms var(--ease);
}
html.js [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 断点 ---------- */
@media (min-width:768px){
:root{--gutter:40px}
.site-footer__inner{grid-template-columns:repeat(2,minmax(0,1fr));gap:40px}
.bento-grid > .col-4{grid-column:span 6}
.bento-grid > .col-6{grid-column:span 12}
.bento-grid > .col-8{grid-column:span 12}
}

@media (min-width:1024px){
:root{--gutter:72px}
body{padding-top:0;padding-left:var(--rail-w)}
#main-content{scroll-margin-top:56px;scroll-margin-left:calc(var(--rail-w) + 24px)}
html{scroll-padding-top:32px}
.topbar{display:none}
.drawer-scrim{display:none !important}
.rail{align-items:center;padding:22px 0 18px}
.page-shell{padding-top:56px}
.bento-grid{gap:24px}
.bento-grid > .col-4{grid-column:span 4}
.bento-grid > .col-6{grid-column:span 6}
.bento-grid > .col-8{grid-column:span 8}
.bento-grid > .col-12{grid-column:span 12}
.site-footer__inner{
grid-template-columns:minmax(260px,1.25fr) repeat(4,minmax(0,1fr));
gap:28px;
padding-top:72px;
}
}

@media (max-width:1023.98px){
.rail{
width:min(86vw,330px);
padding:18px 18px 24px;
gap:14px;
align-items:stretch;
border-right:2px solid var(--gold);
transform:translateX(-104%);
z-index:880;
}
.rail[data-open]{transform:translateX(0)}
.rail__head{justify-content:flex-start;align-items:center;gap:12px}
.rail__brand{writing-mode:horizontal-tb;font-size:20px;letter-spacing:.14em}
.rail__tagline{writing-mode:horizontal-tb;font-size:12px;letter-spacing:.2em}
.rail__index{text-align:left;padding-left:10px}
.rail__link{text-align:left;padding:14px 10px;font-size:15px;letter-spacing:.08em}
.rail__link::before{top:10px;bottom:10px}
.rail__progress{display:none}
.rail__foot{padding:16px 0 0}
.rail__action{min-height:44px;font-size:13.5px}
.search-sheet{
left:0;right:0;
top:var(--topbar-h);
bottom:0;
width:100%;
border-right:0;
border-top:2px solid var(--gold);
transform:translateY(-12px);
}
}

@media (prefers-reduced-motion:reduce){
html{scroll-behavior:auto}
html.js [data-reveal]{opacity:1 !important;transform:none !important;transition:none !important}
.rail,.search-sheet,.card,.btn,.chip,.rail__link,.rail__link::before,.footer-group__link::before{
transition-duration:.001ms !important;
}
.nav-toggle,.nav-toggle__bars{transition-duration:.001ms !important}
.card:hover,.card--action:hover{transform:none}
}