:root{
  --ink:#0B1725;
  --ink-2:#14263A;
  --ink-line:#233B55;
  --paper:#F6F4EF;
  --sand:#E8E2D6;
  --gold:#C9A227;
  --gold-soft:#E4CB84;
  --sage:#7B8C7C;
  --clay:#BE8574;
  --text:#333A42;
  --text-soft:#6B7480;
  --rule:#D5CFC3;
  --font-display:"Source Han Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-editorial:"Source Han Serif SC","Noto Serif SC",Georgia,"Songti SC","SimSun",serif;
  --font-body:"Source Han Serif SC","Noto Serif SC",Georgia,"Songti SC","SimSun",serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --shell:1320px;
  --pad:clamp(18px,4vw,56px);
  --gap:clamp(20px,3vw,40px);
  --radius:2px;
  --ease:cubic-bezier(0.22,0.61,0.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--text);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5,h6{
  margin:0 0 .6em;
  font-family:var(--font-display);
  font-weight:600;
  line-height:1.18;
  letter-spacing:-0.01em;
  color:inherit;
}
p{margin:0 0 1.2em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none}
img,svg,video{max-width:100%;display:block}
button{font:inherit;color:inherit}
input{font:inherit}
hr{border:0;border-top:1px solid var(--rule);margin:0}
[hidden]{display:none !important}
:focus-visible{outline:2px solid var(--gold);outline-offset:3px}
::selection{background:var(--gold-soft);color:var(--ink)}

.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--pad)}
.shell--narrow{max-width:920px}
.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.skip-link{position:absolute;left:var(--pad);top:-64px;z-index:200;padding:10px 18px;background:var(--gold);color:var(--ink);font-family:var(--font-display);font-size:14px;border-radius:var(--radius);transition:top 180ms var(--ease)}
.skip-link:focus{top:10px}

/* ---------- 通用排版与分区 ---------- */
.band{padding-block:clamp(56px,8vw,120px)}
.band--ink{background:var(--ink);color:var(--paper)}
.band--sand{background:var(--sand);color:var(--text)}
.band--paper{background:var(--paper);color:var(--text)}
.band--ink .eyebrow,.band--ink .section-head__index{color:var(--gold-soft)}
.prose{max-width:68ch}
.prose p{font-size:1.0625rem;line-height:1.78}
.prose h2,.prose h3{font-family:var(--font-editorial)}
.eyebrow{margin:0 0 14px;font-family:var(--font-mono);font-size:12px;letter-spacing:.18em;color:var(--text-soft)}
.section-head{display:flex;flex-wrap:wrap;align-items:baseline;gap:12px 20px;margin-bottom:clamp(24px,4vw,48px)}
.section-head__index{font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;color:var(--gold);padding-top:.35em}
.section-head h2{margin:0;font-family:var(--font-editorial);font-size:clamp(24px,3.2vw,40px);font-weight:500;letter-spacing:0}
.rule{height:1px;background:currentColor;opacity:.16;margin-block:clamp(28px,4vw,56px)}

/* ---------- 按钮 ---------- */
.cta-button{
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 20px;border-radius:var(--radius);
  border:1px solid var(--gold);
  background:transparent;color:var(--gold-soft);
  font-family:var(--font-display);font-size:14px;font-weight:500;line-height:1;letter-spacing:.04em;
  cursor:pointer;
  transition:background-color 200ms var(--ease),color 200ms var(--ease),border-color 200ms var(--ease);
}
.cta-button:hover{background:var(--gold);color:var(--ink)}
.cta-button--solid{background:var(--gold);border-color:var(--gold);color:var(--ink)}
.cta-button--solid:hover{background:var(--gold-soft);border-color:var(--gold-soft)}
.band--paper .cta-button,.band--sand .cta-button{color:var(--gold);border-color:var(--gold)}
.band--paper .cta-button:hover,.band--sand .cta-button:hover{background:var(--gold);color:var(--ink)}
.ghost-link{
  display:inline-block;padding:10px 12px;border:1px solid transparent;border-radius:var(--radius);
  font-family:var(--font-display);font-size:13px;letter-spacing:.04em;
  color:rgba(246,244,239,.68);
  transition:color 200ms var(--ease),border-color 200ms var(--ease);
}
.ghost-link:hover{color:var(--gold-soft);border-color:var(--ink-line)}

/* ---------- 分类标签 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 10px;border:1px solid var(--rule);border-radius:999px;
  font-family:var(--font-mono);font-size:12px;line-height:1.5;letter-spacing:.06em;
  color:var(--text-soft);background:transparent;
}
.tag--sage{border-color:var(--sage);color:#4F6051;background:rgba(123,140,124,.12)}
.tag--clay{border-color:var(--clay);color:#8B5340;background:rgba(190,133,116,.12)}
.tag--gold{border-color:var(--gold);color:#7C6210;background:rgba(201,162,39,.12)}
.band--ink .tag{border-color:var(--ink-line);color:rgba(246,244,239,.72);background:rgba(246,244,239,.04)}
.band--ink .tag--sage{border-color:var(--sage);color:#C3CFC4}
.band--ink .tag--clay{border-color:var(--clay);color:#E4C1B5}
.band--ink .tag--gold{border-color:var(--gold);color:var(--gold-soft)}

/* ---------- 玻璃层与图像容器 ---------- */
.glass-panel{
  background:rgba(232,226,214,.42);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border:1px solid rgba(246,244,239,.28);
  padding:clamp(20px,3vw,32px);
  border-radius:var(--radius);
}
.band--ink .glass-panel{background:rgba(20,38,58,.55);border-color:var(--ink-line)}
.media-frame{
  position:relative;display:block;width:100%;overflow:hidden;
  aspect-ratio:4/3;
  border:1px solid var(--ink-line);border-radius:var(--radius);
  background:
    repeating-linear-gradient(45deg,rgba(201,162,39,.14) 0 1px,transparent 1px 14px),
    linear-gradient(140deg,#14263A 0%,#0B1725 100%);
}
.media-frame--paper{border-color:var(--rule);background:
    repeating-linear-gradient(45deg,rgba(190,133,116,.16) 0 1px,transparent 1px 14px),
    linear-gradient(140deg,#EFEAE0 0%,#E1DACB 100%)}
.media-frame--wide{aspect-ratio:16/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}
.media-frame__fill{width:100%;height:100%;object-fit:cover;display:block}
.media-frame__caption{
  position:absolute;left:0;right:0;bottom:0;
  padding:12px 16px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;
  color:var(--paper);
  background:rgba(11,23,37,.62);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border-top:1px solid rgba(246,244,239,.16);
}

/* ---------- 档案卡 ---------- */
.record-card{
  position:relative;display:block;
  padding:22px 24px 22px 30px;
  border:1px solid var(--rule);border-radius:var(--radius);
  background:var(--paper);
  transition:border-color 220ms var(--ease),transform 220ms var(--ease);
}
.record-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--rule)}
.record-card:hover{border-color:var(--gold);transform:translateY(-2px)}
.record-card:hover::before{background:var(--gold)}
.band--ink .record-card{background:var(--ink-2);border-color:var(--ink-line);color:var(--paper)}
.band--ink .record-card::before{background:var(--ink-line)}
.record-card__index{display:block;font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;color:var(--gold);margin-bottom:8px}
.record-card__title{display:block;font-family:var(--font-editorial);font-size:19px;line-height:1.5;margin-bottom:6px}
.record-card__meta{display:block;font-family:var(--font-mono);font-size:12px;color:var(--text-soft);letter-spacing:.04em}
.band--ink .record-card__meta{color:rgba(246,244,239,.6)}

/* ---------- 折叠列表 ---------- */
.accordion{border-top:1px solid var(--rule)}
.accordion__item{border-bottom:1px solid var(--rule)}
.band--ink .accordion,.band--ink .accordion__item{border-color:var(--ink-line)}
.accordion__trigger{
  display:flex;align-items:baseline;justify-content:space-between;gap:18px;
  width:100%;padding:20px 2px;border:0;background:none;text-align:left;cursor:pointer;
  font-family:var(--font-editorial);font-size:clamp(17px,2vw,20px);line-height:1.5;
  transition:color 200ms var(--ease);
}
.accordion__trigger::after{content:"+";font-family:var(--font-mono);font-size:16px;color:var(--gold);flex:none}
.accordion__item[data-open="true"] .accordion__trigger::after{content:"–"}
.accordion__trigger:hover{color:var(--gold)}
.accordion__panel{display:grid;grid-template-rows:0fr;transition:grid-template-rows 260ms var(--ease)}
.accordion__item[data-open="true"] .accordion__panel{grid-template-rows:1fr}
.accordion__panel > div{overflow:hidden}
.accordion__panel p{padding:0 2px 22px;max-width:64ch}

/* ---------- 章节目录 ---------- */
.toc{padding-left:2px}
.toc__link{
  display:block;padding:8px 0 8px 14px;border-left:1px solid var(--rule);
  font-size:14px;color:var(--text-soft);
  transition:color 200ms var(--ease),border-color 200ms var(--ease);
}
.toc__link:hover{color:var(--gold)}
.toc__link[aria-current="true"]{color:var(--ink);border-left-color:var(--gold);font-weight:600}
.band--ink .toc__link{border-left-color:var(--ink-line);color:rgba(246,244,239,.62)}
.band--ink .toc__link[aria-current="true"]{color:var(--paper);border-left-color:var(--gold)}

/* ---------- 面包屑 ---------- */
.breadcrumbs{padding-block:20px 0}
.breadcrumbs__list{display:flex;flex-wrap:wrap;gap:8px;font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--text-soft)}
.breadcrumbs__item{display:flex;gap:8px;align-items:center}
.breadcrumbs__item + .breadcrumbs__item::before{content:"/";opacity:.45}
.breadcrumbs__link:hover{color:var(--gold)}
.breadcrumbs__current{color:var(--text)}
.band--ink .breadcrumbs__list{color:rgba(246,244,239,.6)}
.band--ink .breadcrumbs__current{color:var(--paper)}

/* ---------- 主布局网格 ---------- */
.layout-rail{
  display:grid;
  grid-template-columns:minmax(170px,200px) minmax(0,1fr) minmax(180px,220px);
  gap:var(--gap);
  align-items:start;
}
.layout-rail__rail{position:sticky;top:112px}
.layout-rail__aside{position:sticky;top:112px}
.rail-tags{display:flex;flex-wrap:wrap;gap:8px}
.rail-tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 12px;border:1px solid var(--rule);border-radius:var(--radius);
  background:transparent;cursor:pointer;
  font-family:var(--font-display);font-size:13px;letter-spacing:.03em;color:var(--text-soft);
  transition:color 200ms var(--ease),border-color 200ms var(--ease),background-color 200ms var(--ease);
}
.rail-tag:hover{border-color:var(--gold);color:var(--text)}
.rail-tag[aria-pressed="true"]{border-color:var(--gold);background:rgba(201,162,39,.12);color:var(--ink)}
.band--ink .rail-tag{border-color:var(--ink-line);color:rgba(246,244,239,.7)}
.band--ink .rail-tag[aria-pressed="true"]{border-color:var(--gold);background:rgba(201,162,39,.16);color:var(--paper)}

/* ---------- 头部 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--ink);color:var(--paper);
  border-bottom:1px solid var(--ink-line);
}
.header-progress{height:2px;width:100%;background:var(--ink-line)}
.header-progress__bar{display:block;height:100%;width:0;background:var(--gold);transition:width 120ms linear}
.header-top{
  display:flex;align-items:center;gap:clamp(10px,2vw,26px);
  min-height:78px;padding-block:12px;
  transition:min-height 240ms var(--ease),padding 240ms var(--ease);
}
.site-header[data-compact="true"] .header-top{min-height:56px;padding-block:6px}
.site-header[data-compact="true"] .brand__tagline{display:none}
.index-toggle{
  display:inline-flex;align-items:center;gap:9px;flex:none;
  padding:8px 12px;border:1px solid var(--ink-line);border-radius:var(--radius);
  background:transparent;cursor:pointer;
  font-family:var(--font-display);font-size:13px;letter-spacing:.08em;color:rgba(246,244,239,.8);
  transition:color 200ms var(--ease),border-color 200ms var(--ease),background-color 200ms var(--ease);
}
.index-toggle:hover,.index-toggle[aria-expanded="true"]{color:var(--ink);background:var(--gold);border-color:var(--gold)}
.index-toggle__glyph{display:grid;gap:3px;width:14px}
.index-toggle__glyph i{display:block;height:1px;background:currentColor}
.index-toggle__glyph i:nth-child(2){width:10px}
.index-toggle__glyph i:nth-child(3){width:6px}
.brand{display:inline-flex;align-items:center;gap:12px;flex:none;min-width:0}
.brand__mark{
  display:grid;place-items:center;flex:none;
  width:36px;height:36px;border:1px solid var(--gold);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--gold);
}
.brand__text{display:flex;flex-direction:column;min-width:0}
.brand__name{font-family:var(--font-display);font-size:15px;font-weight:600;letter-spacing:.04em;white-space:nowrap}
.brand__tagline{font-family:var(--font-editorial);font-size:12px;letter-spacing:.34em;color:var(--gold-soft)}
.command-bar{flex:1 1 auto;display:flex;justify-content:center;align-items:center;gap:6px}
.command-bar__list{display:flex;align-items:center;gap:2px}
.command-bar__link{
  position:relative;display:inline-block;
  padding:10px 12px;
  font-family:var(--font-display);font-size:14px;letter-spacing:.02em;
  color:rgba(246,244,239,.72);
  transition:color 200ms var(--ease);
}
.command-bar__link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;
  background:var(--gold);transform:scaleX(0);transform-origin:left;
  transition:transform 240ms var(--ease);
}
.command-bar__link:hover{color:var(--paper)}
.command-bar__link[aria-current="page"]{color:var(--paper)}
.command-bar__link[aria-current="page"]::after{transform:scaleX(1)}
.command-bar__extra{display:none}
.header-actions{display:flex;align-items:center;gap:10px;flex:none;margin-left:auto}
.nav-toggle{
  display:none;align-items:center;gap:9px;
  padding:9px 12px;border:1px solid var(--ink-line);border-radius:var(--radius);
  background:transparent;cursor:pointer;
  font-family:var(--font-display);font-size:13px;letter-spacing:.06em;color:rgba(246,244,239,.85);
}
.nav-toggle__bars{display:grid;gap:4px;width:16px}
.nav-toggle__bars i{display:block;height:1px;background:currentColor;transition:transform 200ms var(--ease)}
.site-header[data-open="true"] .nav-toggle__bars i:first-child{transform:translateY(2.5px) rotate(45deg)}
.site-header[data-open="true"] .nav-toggle__bars i:last-child{transform:translateY(-2.5px) rotate(-45deg)}

/* 全站索引面板 */
.site-index{
  background:var(--ink-2);
  border-top:1px solid var(--ink-line);
  box-shadow:0 22px 46px rgba(11,23,37,.42);
}
.site-index__inner{padding-block:28px 38px}
.site-index__head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:14px 24px;padding-bottom:22px;border-bottom:1px solid var(--ink-line)}
.site-index__search{display:block;flex:1 1 260px;max-width:360px}
.site-index__search input{
  width:100%;padding:9px 2px;border:0;border-bottom:1px solid var(--ink-line);
  background:transparent;color:var(--paper);
  font-family:var(--font-mono);font-size:14px;letter-spacing:.04em;
  transition:border-color 200ms var(--ease);
}
.site-index__search input::placeholder{color:rgba(246,244,239,.38)}
.site-index__search input:focus{border-bottom-color:var(--gold);outline:none}
.site-index__hint{margin:0;font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;color:rgba(246,244,239,.55)}
.site-index__hint span{color:var(--gold-soft)}
.site-index__groups{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:26px 34px;padding-top:26px}
.index-group__title{margin:0 0 12px;font-family:var(--font-mono);font-size:12px;letter-spacing:.18em;color:var(--gold)}
.index-group__list{display:grid;gap:2px}
.index-link{
  display:block;padding:8px 0;border-bottom:1px solid rgba(35,59,85,.6);
  font-family:var(--font-display);font-size:14px;color:rgba(246,244,239,.74);
  transition:color 180ms var(--ease),border-color 180ms var(--ease);
}
.index-link:hover{color:var(--paper);border-bottom-color:var(--gold)}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink);color:rgba(246,244,239,.72);
  border-top:1px solid var(--ink-line);
  padding-block:clamp(56px,7vw,96px) 34px;
}
.footer-top{
  display:grid;grid-template-columns:minmax(220px,1fr) minmax(0,2.4fr);
  gap:clamp(32px,4vw,64px);
  padding-bottom:clamp(32px,4vw,48px);border-bottom:1px solid var(--ink-line);
}
.footer-brand{display:flex;flex-direction:column;align-items:flex-start;gap:10px}
.footer-brand__name{margin:0;font-family:var(--font-display);font-size:20px;font-weight:600;letter-spacing:.04em;color:var(--paper)}
.footer-brand__tagline{margin:0 0 12px;font-family:var(--font-editorial);font-size:13px;letter-spacing:.34em;color:var(--gold-soft)}
.footer-nav{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:28px 24px}
.footer-col__title{margin:0 0 14px;font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;color:var(--gold)}
.footer-col__list{display:grid;gap:10px}
.footer-col__list a,.footer-help__list a{
  font-size:14.5px;color:rgba(246,244,239,.72);
  transition:color 180ms var(--ease);
}
.footer-col__list a:hover,.footer-help__list a:hover{color:var(--gold-soft)}
.footer-help{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px 32px;
  padding-block:22px;border-bottom:1px solid var(--ink-line);
}
.footer-help .footer-col__title{margin:0}
.footer-help__list{display:flex;flex-wrap:wrap;gap:12px 28px}
.footer-contact{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));
  gap:8px 36px;padding-block:26px;
  font-size:15px;
}
.footer-contact__row{margin:0;line-height:1.7;word-break:break-all}
.footer-contact__key{
  display:inline-block;margin-right:12px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;color:var(--gold);
}
.footer-legal{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px 28px;
  padding-top:24px;border-top:1px solid var(--ink-line);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:rgba(246,244,239,.55);
}
.footer-legal__links{display:flex;flex-wrap:wrap;gap:10px;margin:0}
.footer-legal__links a:hover{color:var(--gold-soft)}
.footer-legal__meta{margin:0}
.footer-sign{
  margin:26px 0 0;text-align:center;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.4em;color:rgba(246,244,239,.42);
}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:clamp(16px,3vw,28px);bottom:clamp(16px,3vw,28px);z-index:70;
  width:46px;height:46px;display:grid;place-items:center;
  border:1px solid var(--gold);border-radius:50%;
  background:rgba(11,23,37,.88);color:var(--gold-soft);cursor:pointer;
  font-family:var(--font-mono);font-size:15px;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity 220ms var(--ease),transform 220ms var(--ease),visibility 220ms,background-color 200ms var(--ease);
}
.to-top[data-visible="true"]{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:var(--gold);color:var(--ink)}

/* ---------- 平板 ---------- */
@media (max-width:1100px){
  .layout-rail{grid-template-columns:minmax(160px,190px) minmax(0,1fr)}
  .layout-rail__aside{display:none}
  .footer-top{grid-template-columns:1fr}
  .footer-nav{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:960px){
  .nav-toggle{display:inline-flex}
  .header-actions .cta-button{display:none}
  .command-bar{
    position:fixed;left:0;right:0;top:0;z-index:55;
    display:block;justify-content:flex-start;
    padding:88px var(--pad) 32px;
    background:var(--ink-2);border-bottom:1px solid var(--ink-line);
    max-height:100vh;overflow-y:auto;
    opacity:0;visibility:hidden;pointer-events:none;transform:translateY(-10px);
    transition:opacity 220ms var(--ease),transform 220ms var(--ease),visibility 220ms;
  }
  .site-header[data-open="true"] .command-bar{
    opacity:1;visibility:visible;pointer-events:auto;transform:none;
  }
  .command-bar__list{display:grid;gap:0}
  .command-bar__link{
    display:block;padding:16px 0;
    border-bottom:1px solid var(--ink-line);
    font-size:18px;color:rgba(246,244,239,.86);
  }
  .command-bar__link::after{left:0;right:auto;width:44px;bottom:10px}
  .command-bar__extra{display:flex;flex-wrap:wrap;gap:12px;padding-top:24px}
  .layout-rail{grid-template-columns:minmax(0,1fr)}
  .layout-rail__rail,.layout-rail__aside{position:static}
  .rail-tags{flex-wrap:nowrap;overflow-x:auto;padding-bottom:6px}
}
/* ---------- 手机 ---------- */
@media (max-width:640px){
  body{font-size:16px}
  .index-toggle__label{display:none}
  .brand__tagline{display:none}
  .brand__mark{width:32px;height:32px}
  .header-top{min-height:64px}
  .footer-nav{grid-template-columns:1fr}
  .footer-help{display:grid;gap:14px}
  .footer-legal{font-family:var(--font-mono);font-size:11px}
  .site-index__groups{grid-template-columns:1fr 1fr}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .to-top,.command-bar{transform:none !important}
  .record-card:hover{transform:none}
}