:root{
  color-scheme: dark;
  --c-turf:#0C3B2E;
  --c-night:#06231B;
  --c-lamp:#F3EEE2;
  --c-score:#FF5C24;
  --c-data:#4A8DFF;
  --c-wine:#78203C;
  --c-indigo:#2C2A6B;
  --c-live:#2EA36B;
  --c-grid:#9DA8A1;
  --c-turf-hi:#14503E;

  --line-hair:rgba(243,238,226,.18);
  --line-soft:rgba(243,238,226,.10);
  --line-grid:rgba(243,238,226,.14);
  --line-strong:rgba(243,238,226,.44);
  --ink-dim:rgba(243,238,226,.68);
  --ink-faint:rgba(243,238,226,.46);

  --font-display:"Songti SC","STSong","Noto Serif SC","Source Han Serif SC",SimSun,serif;
  --font-narrow:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Arial Narrow","Helvetica Neue",Arial,sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --font-mono:ui-monospace,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;

  --fs-14:14px; --fs-16:16px; --fs-18:18px; --fs-22:22px;
  --fs-30:30px; --fs-44:44px; --fs-60:60px; --fs-76:76px;

  --content-max:1280px;
  --pad-x:clamp(16px,3vw,40px);
  --nav-h:64px;
  --stick-top:104px;
  --read-progress:0%;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,figcaption,blockquote,dl,dd{margin:0;}
ul,ol{padding:0;list-style:none;}
img,svg,video{display:block;max-width:100%;height:auto;}
button,input,select,textarea{font:inherit;color:inherit;}
button{background:none;border:0;padding:0;cursor:pointer;}
a{color:inherit;text-decoration:none;}
table{border-collapse:collapse;width:100%;}
:focus-visible{outline:2px solid var(--c-data);outline-offset:2px;}
:focus:not(:focus-visible){outline:none;}

body{
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  color:var(--c-lamp);
  background-color:var(--c-turf);
  background-image:linear-gradient(90deg,rgba(243,238,226,.045) 1px,transparent 1px);
  background-size:80px 100%;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:600;
  line-height:1.12;
  letter-spacing:-.01em;
  text-wrap:balance;
}
p{text-wrap:pretty;}
strong,b{font-weight:600;}

/* ---------- 通用工具 ---------- */
.container{width:100%;max-width:var(--content-max);margin:0 auto;padding:0 var(--pad-x);}
.container--narrow{max-width:880px;}
.narrow{max-width:760px;}
.label{
  display:inline-block;
  font-family:var(--font-narrow);
  font-size:12px;
  font-weight:500;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--ink-faint);
}
.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum" 1;
  letter-spacing:-.01em;
}
.mono{font-family:var(--font-mono);}
.rule{height:1px;background:var(--line-hair);border:0;margin:0;}
.rule--accent{height:2px;width:56px;background:var(--c-score);}

.skip-link{
  position:absolute;
  left:-9999px;
  top:0;
  z-index:200;
  padding:12px 20px;
  background:var(--c-score);
  color:#08170F;
  font-family:var(--font-narrow);
  font-size:14px;
  font-weight:600;
}
.skip-link:focus{left:8px;top:8px;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:12px 22px;
  border:1px solid var(--line-strong);
  border-radius:0;
  font-family:var(--font-narrow);
  font-size:15px;
  font-weight:500;
  letter-spacing:.02em;
  color:var(--c-lamp);
  background:transparent;
  transition:background .18s ease,border-color .18s ease,color .18s ease;
}
.btn:hover{background:var(--c-turf-hi);border-color:var(--c-lamp);}
.btn--primary{background:var(--c-score);border-color:var(--c-score);color:#08170F;font-weight:600;}
.btn--primary:hover{background:#ff7a4b;border-color:#ff7a4b;color:#08170F;}
.btn--ghost{color:var(--c-data);border-color:rgba(74,141,255,.5);}
.btn--ghost:hover{background:rgba(74,141,255,.12);border-color:var(--c-data);color:var(--c-lamp);}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  font-family:var(--font-narrow);
  font-size:13px;
  color:var(--ink-faint);
}
.breadcrumb-list{display:flex;flex-wrap:wrap;align-items:center;gap:0;}
.breadcrumb-item{display:inline-flex;align-items:center;}
.breadcrumb-item::after{content:"/";margin:0 8px;color:var(--line-strong);}
.breadcrumb-item:last-child::after{content:"";margin:0;}
.breadcrumb-item a:hover{color:var(--c-lamp);}
.breadcrumb-item[aria-current="page"]{color:var(--c-lamp);}

/* ---------- 段落与标题 ---------- */
.section{
  padding:clamp(32px,5vw,64px) 0;
  border-top:1px solid var(--line-hair);
}
.section:first-of-type{border-top:0;}
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:12px 24px;
  margin-bottom:24px;
}
.section-head .label{display:block;margin-bottom:8px;}
.section-title{font-size:clamp(24px,3vw,34px);}
.section-lede{max-width:58ch;font-size:16px;line-height:1.8;color:var(--ink-dim);}
.lede{font-size:var(--fs-18);line-height:1.85;color:var(--ink-dim);}
.text-dim{color:var(--ink-dim);}
.text-score{color:var(--c-score);}
.text-data{color:var(--c-data);}
.text-live{color:var(--c-live);}

/* ---------- 骨架：左索引轨 + 右内容 ---------- */
.layout-rail{
  display:grid;
  grid-template-columns:minmax(200px,3fr) 9fr;
  gap:0;
  width:100%;
  max-width:var(--content-max);
  margin:0 auto;
  padding:0 var(--pad-x);
}
.rail-index{
  position:sticky;
  top:var(--stick-top);
  align-self:start;
  padding:28px 24px 28px 0;
  border-right:1px solid var(--line-hair);
}
.rail-index .label{display:block;margin-bottom:16px;}
.rail-body{padding:28px 0 28px 32px;min-width:0;}
.toc-list{display:block;}
.toc-link{
  display:block;
  padding:9px 0 9px 14px;
  border-left:1px solid var(--line-soft);
  font-family:var(--font-narrow);
  font-size:14px;
  letter-spacing:.01em;
  color:var(--ink-dim);
  transition:color .18s ease,border-color .18s ease,background .18s ease;
}
.toc-link:hover{color:var(--c-lamp);background:rgba(243,238,226,.05);}
.toc-link.is-active{
  color:var(--c-lamp);
  font-weight:600;
  border-left:2px solid var(--c-score);
  padding-left:13px;
  background:rgba(243,238,226,.06);
}

/* ---------- Bento 网格 ---------- */
.bento{
  display:grid;
  gap:1px;
  background:var(--line-grid);
  border:1px solid var(--line-grid);
}
.bento-cell{
  background:var(--c-turf);
  padding:clamp(18px,2.2vw,28px);
  min-width:0;
}

/* ---------- 面板 ---------- */
.panel{
  padding:clamp(18px,2.2vw,26px);
  background:var(--c-night);
  border:1px solid var(--line-hair);
  min-width:0;
}
.panel--wine{background:var(--c-wine);border-color:rgba(243,238,226,.26);}
.panel--indigo{background:var(--c-indigo);border-color:rgba(243,238,226,.26);}
.panel--live{background:var(--c-turf-hi);}
.panel-head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:8px 16px;
  padding-bottom:12px;
  margin-bottom:16px;
  border-bottom:1px solid var(--line-hair);
}
.panel-title{
  font-family:var(--font-narrow);
  font-size:15px;
  font-weight:600;
  letter-spacing:.06em;
}
.panel-note{font-family:var(--font-narrow);font-size:12px;letter-spacing:.08em;color:var(--ink-faint);}

/* ---------- 表格 ---------- */
.table-wrap{
  overflow-x:auto;
  border:1px solid var(--line-hair);
  background:var(--c-night);
}
.data-table{min-width:520px;font-size:15px;}
.data-table caption{
  padding:14px 16px;
  text-align:left;
  font-family:var(--font-narrow);
  font-size:13px;
  letter-spacing:.06em;
  color:var(--ink-faint);
  border-bottom:1px solid var(--line-soft);
}
.data-table th,.data-table td{
  padding:11px 16px;
  text-align:left;
  border-bottom:1px solid var(--line-soft);
  white-space:nowrap;
}
.data-table thead th{
  font-family:var(--font-narrow);
  font-size:12px;
  font-weight:600;
  letter-spacing:.12em;
  color:var(--c-data);
  background:rgba(74,141,255,.08);
}
.data-table tbody tr{transition:background .16s ease,box-shadow .16s ease;}
.data-table tbody tr:hover{background:var(--c-turf-hi);box-shadow:inset 2px 0 0 var(--c-lamp);}
.data-table tbody tr:last-child td{border-bottom:0;}
.data-table .num{color:var(--c-lamp);}

/* ---------- 图片容器 ---------- */
.figure-frame{
  position:relative;
  overflow:hidden;
  border:1px solid var(--line-hair);
  background:var(--c-night);
}
.figure-frame img{width:100%;height:100%;object-fit:cover;filter:saturate(.94) contrast(1.05);}
.figure-frame--16x9{aspect-ratio:16/9;}
.figure-frame--4x3{aspect-ratio:4/3;}
.figure-frame--3x2{aspect-ratio:3/2;}
.figure-frame--1x1{aspect-ratio:1/1;}
.figure-frame--tall{aspect-ratio:3/4;}
.figure-frame--diagonal::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(118deg,rgba(12,59,46,.74) 0%,rgba(12,59,46,.14) 48%,rgba(255,92,36,.22) 100%);
  pointer-events:none;
}
.figure-frame figcaption{
  position:absolute;
  left:0;
  bottom:0;
  padding:10px 14px;
  font-family:var(--font-narrow);
  font-size:12px;
  letter-spacing:.04em;
  background:rgba(6,35,27,.84);
  border-top:1px solid var(--line-hair);
}

/* ---------- 标签 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 9px;
  border:1px solid var(--line-hair);
  font-family:var(--font-narrow);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--ink-dim);
}
.tag--score{color:var(--c-score);border-color:rgba(255,92,36,.5);}
.tag--data{color:var(--c-data);border-color:rgba(74,141,255,.5);}
.tag--live{color:var(--c-live);border-color:rgba(46,163,107,.5);}

/* ---------- 显现 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .5s ease,transform .5s ease;
}
[data-reveal].is-in{opacity:1;transform:none;}

/* ---------- 返回顶部 ---------- */
.back-to-top{
  position:fixed;
  right:clamp(14px,3vw,32px);
  bottom:clamp(14px,3vw,32px);
  z-index:70;
  width:46px;
  height:46px;
  display:grid;
  place-items:center;
  background:var(--c-night);
  border:1px solid var(--line-strong);
  color:var(--c-lamp);
  font-size:18px;
  line-height:1;
  opacity:0;
  visibility:hidden;
  transform:translateY(8px);
  transition:opacity .24s ease,transform .24s ease,visibility .24s,background .18s ease,color .18s ease;
}
.back-to-top.is-visible{opacity:1;visibility:visible;transform:none;}
.back-to-top:hover{background:var(--c-score);border-color:var(--c-score);color:#08170F;}

/* ================= 头部 ================= */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:var(--c-turf);
  border-bottom:1px solid var(--line-hair);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;
  bottom:-1px;
  height:2px;
  width:var(--read-progress,0%);
  background:linear-gradient(90deg,var(--c-data),var(--c-score));
  transition:width .1s linear;
  pointer-events:none;
}
.header-frame{
  position:relative;
  display:flex;
  align-items:stretch;
  justify-content:space-between;
  gap:16px;
  min-height:var(--nav-h);
  width:100%;
  max-width:var(--content-max);
  margin:0 auto;
  padding:0 var(--pad-x);
  border-left:1px solid var(--line-soft);
  border-right:1px solid var(--line-soft);
}
.header-brand{
  display:flex;
  align-items:center;
  gap:clamp(10px,1.6vw,18px);
  min-width:0;
}
.brand-mark{display:flex;align-items:baseline;gap:9px;}
.brand-index{
  font-family:var(--font-mono);
  font-size:24px;
  font-weight:700;
  letter-spacing:-.04em;
  line-height:1;
  color:var(--c-score);
}
.brand-name{
  font-family:var(--font-display);
  font-size:19px;
  font-weight:600;
  letter-spacing:.03em;
  color:var(--c-lamp);
  white-space:nowrap;
}
.round-flag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:4px 10px;
  border:1px solid var(--line-hair);
  font-family:var(--font-narrow);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--ink-dim);
  white-space:nowrap;
}
.round-dot{
  width:6px;
  height:6px;
  background:var(--c-live);
  box-shadow:0 0 0 3px rgba(46,163,107,.18);
}
.round-text b{
  font-family:var(--font-mono);
  font-weight:600;
  color:var(--c-lamp);
  margin:0 2px;
}
.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:0 4px 0 16px;
  border-left:1px solid var(--line-soft);
  font-family:var(--font-narrow);
  font-size:13px;
  font-weight:500;
  letter-spacing:.14em;
  color:var(--ink-dim);
}
.nav-toggle:hover{color:var(--c-lamp);}
.nav-toggle-icon{
  display:flex;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  width:18px;
}
.nav-toggle-bar{display:block;height:1px;background:currentColor;}
.nav-toggle-bar:first-child{width:12px;}
.site-header[data-open] .nav-toggle-bar:first-child{width:18px;background:var(--c-score);}
.site-nav{display:flex;margin-left:auto;min-width:0;}
.nav-list{display:flex;align-items:stretch;}
.nav-item{display:flex;}
.nav-link{
  position:relative;
  display:flex;
  align-items:center;
  padding:0 clamp(10px,1.4vw,22px);
  border-left:1px solid var(--line-soft);
  font-family:var(--font-narrow);
  font-size:15px;
  font-weight:500;
  letter-spacing:.02em;
  color:var(--ink-dim);
  white-space:nowrap;
  transition:color .18s ease,background .18s ease;
}
.nav-link:hover{color:var(--c-lamp);background:var(--c-turf-hi);}
.nav-link[aria-current="page"]{
  color:var(--c-lamp);
  font-weight:700;
  background:rgba(243,238,226,.07);
}
.nav-link[aria-current="page"]::before{
  content:"";
  position:absolute;
  left:0;
  right:0;
  top:0;
  height:2px;
  background:var(--c-lamp);
}
.utility-line{
  display:flex;
  align-items:center;
  gap:14px;
  width:100%;
  max-width:var(--content-max);
  margin:0 auto;
  padding:6px var(--pad-x);
  border-top:1px solid var(--line-soft);
  font-family:var(--font-narrow);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--ink-faint);
}
.utility-item{display:inline-flex;align-items:center;gap:8px;white-space:nowrap;}
.utility-key{color:var(--ink-faint);}
.utility-val{font-family:var(--font-mono);color:var(--c-lamp);}
.utility-sep{width:1px;height:10px;background:var(--line-hair);}
.utility-item--right{margin-left:auto;color:var(--ink-faint);}

/* ================= 页脚 ================= */
.site-footer{
  background:var(--c-night);
  border-top:1px solid var(--line-hair);
  margin-top:clamp(40px,6vw,80px);
}
.footer-top{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px 32px;
  width:100%;
  max-width:var(--content-max);
  margin:0 auto;
  padding:clamp(32px,4vw,48px) var(--pad-x) 28px;
  border-bottom:1px solid var(--line-soft);
}
.footer-brand-block{min-width:0;}
.footer-brand{
  display:inline-block;
  font-family:var(--font-display);
  font-size:clamp(26px,3.6vw,40px);
  font-weight:600;
  letter-spacing:-.01em;
  line-height:1.1;
  color:var(--c-lamp);
}
.footer-brand:hover{color:var(--c-score);}
.footer-note{
  margin-top:12px;
  max-width:52ch;
  font-size:15px;
  line-height:1.75;
  color:var(--ink-dim);
}
.footer-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 12px;
  border:1px solid var(--line-hair);
  font-family:var(--font-narrow);
  font-size:12px;
  letter-spacing:.12em;
  color:var(--c-data);
  white-space:nowrap;
}
.footer-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:1px;
  width:100%;
  max-width:var(--content-max);
  margin:0 auto;
  padding:0 var(--pad-x);
  background:var(--line-grid);
}
.footer-col{
  background:var(--c-night);
  padding:28px 24px 30px;
  min-width:0;
}
.footer-title{
  margin-bottom:16px;
  font-family:var(--font-narrow);
  font-size:12px;
  font-weight:600;
  letter-spacing:.16em;
  color:var(--c-data);
}
.footer-list li+li{margin-top:10px;}
.footer-list a{
  font-size:15px;
  color:var(--ink-dim);
  border-bottom:1px solid transparent;
  transition:color .18s ease,border-color .18s ease;
}
.footer-list a:hover{color:var(--c-lamp);border-bottom-color:var(--c-score);}
.footer-meta{
  margin-top:14px;
  font-size:14px;
  line-height:1.7;
  color:var(--ink-dim);
  word-break:break-word;
}
.footer-key{
  display:block;
  font-family:var(--font-narrow);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--ink-faint);
}
.footer-region{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:8px 20px;
  width:100%;
  max-width:var(--content-max);
  margin:0 auto;
  padding:14px var(--pad-x);
  border-top:1px solid var(--line-soft);
  font-size:13px;
  color:var(--ink-faint);
}
.footer-legal{
  background:var(--c-turf);
  border-top:1px solid var(--line-hair);
}
.footer-legal-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:8px 20px;
  width:100%;
  max-width:var(--content-max);
  margin:0 auto;
  padding:16px var(--pad-x);
  font-family:var(--font-narrow);
  font-size:13px;
  letter-spacing:.04em;
  color:var(--ink-dim);
}
.footer-legal-link{
  color:var(--ink-dim);
  border-bottom:1px solid var(--line-hair);
  transition:color .18s ease,border-color .18s ease;
}
.footer-legal-link:hover{color:var(--c-lamp);border-bottom-color:var(--c-score);}

/* ================= 响应式 ================= */
@media (max-width:1100px){
  .nav-link{padding:0 14px;font-size:14px;}
  .brand-name{font-size:18px;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:980px){
  :root{--stick-top:80px;}
  .header-frame{padding:0 var(--pad-x);}
  .nav-toggle{display:inline-flex;}
  .site-nav{
    position:fixed;
    top:0;
    left:0;
    bottom:0;
    z-index:90;
    width:min(84vw,330px);
    display:block;
    margin:0;
    padding:calc(var(--nav-h) + 34px) 0 32px;
    overflow-y:auto;
    background:var(--c-night);
    border-right:1px solid var(--line-hair);
    transform:translateX(-100%);
    transition:transform .3s cubic-bezier(.2,.7,.3,1);
  }
  .site-header[data-open] .site-nav{transform:translateX(0);}
  .nav-list{display:block;}
  .nav-item{display:block;}
  .nav-link{
    display:block;
    padding:16px 26px;
    border-left:0;
    border-bottom:1px solid var(--line-soft);
    font-size:16px;
    line-height:1.3;
  }
  .nav-link[aria-current="page"]{
    background:var(--c-turf-hi);
    box-shadow:inset 3px 0 0 var(--c-score);
  }
  .nav-link[aria-current="page"]::before{display:none;}
  .round-flag{display:none;}
  .layout-rail{grid-template-columns:1fr;padding:0;}
  .rail-index{
    position:static;
    border-right:0;
    border-bottom:1px solid var(--line-hair);
    padding:20px var(--pad-x);
  }
  .rail-body{padding:24px var(--pad-x) 32px;}
  .toc-list{display:flex;flex-wrap:wrap;gap:0 4px;}
  .toc-link{
    border-left:0;
    border-bottom:1px solid var(--line-soft);
    padding:8px 12px;
    font-size:13px;
  }
  .toc-link.is-active{
    border-left:0;
    border-bottom:2px solid var(--c-score);
    padding-left:12px;
    padding-bottom:7px;
  }
}
@media (max-width:760px){
  body{font-size:16px;background-size:56px 100%;}
  .utility-item--right{display:none;}
  .section-head{align-items:flex-start;}
  .footer-top{padding-top:32px;}
}
@media (max-width:560px){
  .footer-grid{grid-template-columns:1fr;}
  .footer-col{padding:22px 20px 24px;}
  .brand-index{font-size:21px;}
  .brand-name{font-size:17px;}
  .nav-toggle-label{display:none;}
  .data-table{min-width:460px;}
  .back-to-top{width:42px;height:42px;}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  [data-reveal]{opacity:1 !important;transform:none !important;}
  .site-nav{transition:none;}
}