/* ===========================================================
   万象城 ALLWINCITY — 共享样式表 /assets/site.css
   骨架：左侧品牌轨道 + 顶部框架导航 + 暖纸版心
   =========================================================== */

:root{
  --paper:#F2ECE1;
  --paper-2:#E3DACB;
  --ink:#12141A;
  --ink-2:#232732;
  --gold:#C9A961;
  --gold-soft:#EADFC4;
  --cyan:#16C7C0;
  --coral:#FF6A46;
  --steel:#5E7488;
  --muted:#6E7480;
  --teal-deep:#0E8F8A;
  --coral-deep:#C33E1F;
  --line-paper:rgba(201,169,97,.55);
  --line-ink:rgba(201,169,97,.30);
  --rail-w:0px;
  --top-h:74px;
  --gutter:clamp(20px,3.6vw,64px);
  --dur:200ms;
  --ease:cubic-bezier(.2,.7,.3,1);
  --cut-a:clamp(14px,2.4vw,34px);
  --cut-b:clamp(26px,4.8vw,68px);
  --font-display:"Archivo","Space Grotesk","Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Inter","Source Han Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono","SFMono-Regular",Menlo,Consolas,"Courier New",monospace;
}
@media (min-width:1100px){
  :root{ --rail-w:96px; --top-h:78px; }
}

/* ---------- Reset ---------- */
*,*::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,blockquote,dl,dd{ margin:0; }
ul,ol{ list-style:none; padding:0; }
img,svg,video{ display:block; max-width:100%; }
button,input,select,textarea{ font:inherit; color:inherit; }
a{ color:inherit; }
table{ border-collapse:collapse; width:100%; }
[hidden]{ display:none !important; }
:focus{ outline:none; }
:focus-visible{ outline:2px solid var(--cyan); outline-offset:2px; }

/* ---------- 中文排版基底 ---------- */
body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.85;
  letter-spacing:.01em;
  padding-top:var(--top-h);
  padding-left:var(--rail-w);
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}
p + p{ margin-top:1.2em; }
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.08;
  text-wrap:balance;
}
h1{ font-size:clamp(34px,5.4vw,68px); }
h2{ font-size:clamp(26px,3.6vw,46px); }
h3{ font-size:clamp(19px,2vw,26px); }
strong,b{ font-weight:800; }
small{ font-size:13px; }
main{ display:block; }
main:focus{ outline:none; }
[data-section],section[id]{ scroll-margin-top:calc(var(--top-h) + 18px); }
.mono,.u-mono{ font-family:var(--font-mono); letter-spacing:.08em; }
.u-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;
}
.flow > * + *{ margin-top:1.2em; }

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed; top:10px; left:10px; z-index:200;
  padding:10px 18px;
  background:var(--ink); color:var(--paper);
  font-family:var(--font-mono); font-size:12px; letter-spacing:.1em;
  text-decoration:none; border:1px solid var(--gold);
  transform:translateY(-180%);
  transition:transform var(--dur) var(--ease);
}
.skip-link:focus{ transform:translateY(0); }

/* ---------- 左侧品牌轨道 ---------- */
.rail{ display:none; }
.rail__brand{
  display:flex; flex-direction:column; align-items:center; gap:12px;
  width:100%; padding:22px 0 18px;
  text-decoration:none; color:var(--paper);
  border-bottom:1px solid var(--line-ink);
}
.rail__cn{
  writing-mode:vertical-rl;
  font-family:var(--font-display); font-weight:900;
  font-size:19px; letter-spacing:.26em; color:var(--paper);
}
.rail__en{
  writing-mode:vertical-rl;
  font-family:var(--font-mono); font-size:9px; letter-spacing:.32em;
  color:var(--gold);
}
.rail__nav{
  flex:1 1 auto; width:100%; overflow-y:auto;
  display:flex; flex-direction:column; align-items:center; gap:10px;
  padding:14px 0;
}
.rail__index{ display:flex; flex-direction:column; align-items:center; gap:6px; width:100%; }
.rail__item{
  width:44px; min-height:30px;
  display:grid; place-items:center;
  background:transparent; border:1px solid transparent; border-radius:0;
  color:rgba(242,236,225,.55);
  font-family:var(--font-mono); font-size:11px; letter-spacing:.06em;
  cursor:pointer;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.rail__item:hover{ color:var(--cyan); border-color:rgba(22,199,192,.55); }
.rail__item[aria-current="true"]{ background:var(--gold); border-color:var(--gold); color:var(--ink); }
.rail__item-num{ pointer-events:none; }
.rail__empty{
  writing-mode:vertical-rl;
  font-family:var(--font-mono); font-size:9px; letter-spacing:.24em;
  color:rgba(242,236,225,.45);
}
.rail__top{
  display:flex; flex-direction:column; align-items:center; gap:2px;
  width:44px; padding:8px 0;
  background:transparent; border:1px solid var(--line-ink); border-radius:0;
  color:rgba(242,236,225,.65); cursor:pointer;
  font-family:var(--font-mono); font-size:10px; letter-spacing:.12em;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.rail__top:hover{ color:var(--ink); background:var(--cyan); border-color:var(--cyan); }
.rail__top-mark{ font-size:13px; line-height:1; }
.rail__top-text{ writing-mode:vertical-rl; }

@media (min-width:1100px){
  .rail{
    position:fixed; top:0; left:0; bottom:0;
    width:var(--rail-w); z-index:80;
    display:flex; flex-direction:column; align-items:center;
    background:var(--ink); color:var(--paper);
    border-right:1px solid var(--line-ink);
  }
}

/* ---------- 顶部框架导航 ---------- */
.site-frame{
  position:fixed; top:0; left:var(--rail-w); right:0; height:var(--top-h);
  z-index:60;
  display:flex; align-items:center; gap:clamp(10px,1.6vw,26px);
  padding:0 var(--gutter);
  background:rgba(242,236,225,.94);
  -webkit-backdrop-filter:saturate(1.3) blur(9px);
  backdrop-filter:saturate(1.3) blur(9px);
  border-bottom:1px solid var(--line-paper);
  transition:background var(--dur) var(--ease);
}
.site-header.is-scrolled .site-frame{ background:rgba(242,236,225,.99); }
.scroll-progress{
  position:absolute; left:0; right:0; bottom:-1px; height:2px;
  background:rgba(201,169,97,.18); pointer-events:none;
}
.scroll-progress__bar{
  display:block; height:100%; width:100%;
  background:linear-gradient(90deg,var(--gold) 0%,var(--cyan) 100%);
  transform:scaleX(0); transform-origin:left center;
  transition:transform 120ms linear;
}
.brand{
  display:flex; flex-direction:column; gap:1px;
  text-decoration:none; color:var(--ink); flex:0 0 auto;
  padding-left:12px; position:relative;
}
.brand::before{
  content:""; position:absolute; left:0; top:4px; bottom:4px; width:3px;
  background:var(--gold);
}
.brand__mark{ font-family:var(--font-display); font-weight:900; font-size:20px; letter-spacing:-.02em; line-height:1.2; }
.brand__latin{ font-family:var(--font-mono); font-size:10px; letter-spacing:.28em; color:var(--gold); line-height:1.2; }
.brand__tagline{
  display:none;
  font-size:13px; color:var(--muted); line-height:1.5;
  padding-left:clamp(10px,1.4vw,22px);
  border-left:1px solid var(--line-paper);
}
@media (min-width:1320px){ .brand__tagline{ display:block; } }

.nav-toggle{
  display:none;
  align-items:center; gap:10px;
  margin-left:auto; padding:9px 14px;
  background:transparent; border:1px solid var(--ink); border-radius:0;
  font-family:var(--font-mono); font-size:12px; letter-spacing:.14em;
  cursor:pointer;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.nav-toggle:hover{ background:var(--ink); color:var(--paper); }
.nav-toggle__bars{ display:inline-flex; flex-direction:column; gap:4px; width:18px; }
.nav-toggle__bars i{
  display:block; height:1.5px; background:currentColor;
  transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease);
}
.site-header[data-open] .nav-toggle__bars i:nth-child(1){ transform:translateY(5.5px) rotate(45deg); }
.site-header[data-open] .nav-toggle__bars i:nth-child(2){ opacity:0; }
.site-header[data-open] .nav-toggle__bars i:nth-child(3){ transform:translateY(-5.5px) rotate(-45deg); }
.nav-toggle__label{ line-height:1; }

.site-nav{ display:flex; }
.site-nav__note{ display:none; }
.site-nav__list{ display:flex; align-items:center; gap:2px; flex-wrap:wrap; }
.site-nav__item{ display:block; }
.site-nav__link{
  position:relative;
  display:inline-flex; align-items:baseline; gap:7px;
  padding:11px 12px;
  font-size:15px; line-height:1; color:var(--ink); text-decoration:none;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease);
}
.site-nav__idx{ font-family:var(--font-mono); font-size:10px; letter-spacing:.08em; color:var(--gold); }
.site-nav__link::after{
  content:""; position:absolute; left:12px; bottom:5px; width:24px; height:1px;
  background:var(--gold); transform:scaleX(0); transform-origin:left center;
  transition:transform var(--dur) var(--ease);
}
.site-nav__link:hover{ background:var(--paper-2); }
.site-nav__link:hover::after,
.site-nav__link:focus-visible::after,
.site-nav__link[aria-current="page"]::after{ transform:scaleX(1); }
.site-nav__link[aria-current="page"]{ font-weight:800; }
.site-nav__link[aria-current="page"] .site-nav__idx{ color:var(--teal-deep); }
.site-nav__actions{ display:none; }

.frame-actions{ display:none; }

@media (min-width:1025px){
  .site-nav{ margin-left:auto; }
  .frame-actions{ display:flex; align-items:center; gap:10px; }
}
@media (min-width:1025px) and (max-width:1279px){
  .site-nav__link{ padding:10px 8px; font-size:14px; }
  .site-nav__idx{ font-size:9px; }
}

@media (max-width:1024px){
  .nav-toggle{ display:inline-flex; }
  .site-nav{
    position:fixed; top:var(--top-h); left:0; right:0;
    display:block;
    max-height:calc(100vh - var(--top-h));
    overflow-y:auto;
    padding:16px var(--gutter) 30px;
    background:var(--ink); color:var(--paper);
    border-bottom:1px solid var(--line-ink);
    opacity:0; visibility:hidden; transform:translateY(-10px);
    transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease),visibility var(--dur) var(--ease);
  }
  .site-nav[data-open]{ opacity:1; visibility:visible; transform:translateY(0); }
  .site-nav__note{
    display:block; margin-bottom:14px; padding-bottom:14px;
    border-bottom:1px solid var(--line-ink);
    font-family:var(--font-mono); font-size:11px; letter-spacing:.06em;
    color:rgba(242,236,225,.6);
  }
  .site-nav__list{ flex-direction:column; align-items:stretch; gap:0; }
  .site-nav__link{
    width:100%; justify-content:flex-start;
    padding:16px 0; font-size:19px; font-weight:700; color:var(--paper);
    border-bottom:1px solid rgba(242,236,225,.12);
  }
  .site-nav__link:hover{ background:transparent; color:var(--cyan); }
  .site-nav__link::after{ left:0; bottom:6px; }
  .site-nav__idx{ font-size:11px; color:var(--gold); }
  .site-nav__actions{ display:flex; flex-direction:column; gap:10px; margin-top:22px; }
  body.nav-open{ overflow:hidden; }
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:12px 20px; border-radius:0;
  border:1px solid var(--ink); background:transparent; color:var(--ink);
  font-family:var(--font-body); font-size:14px; font-weight:700; letter-spacing:.02em;
  text-decoration:none; cursor:pointer;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.btn:hover{ transform:translateY(-2px); }
.btn--ghost:hover{ background:var(--ink); color:var(--paper); }
.btn--solid{ background:var(--coral); border-color:var(--coral); color:var(--ink); }
.btn--solid:hover{ background:var(--gold); border-color:var(--gold); color:var(--ink); }
.btn--block{ width:100%; }

/* ---------- 版心与栅格 ---------- */
.wrap{ width:100%; max-width:1440px; margin:0 auto; padding:0 var(--gutter); }
.wrap--narrow{ max-width:1000px; }
.grid{ display:grid; grid-template-columns:repeat(12,minmax(0,1fr)); gap:24px; }
.col-3,.col-4,.col-5,.col-6,.col-7,.col-8,.col-9,.col-10,.col-12{ grid-column:span 12; }
@media (min-width:760px){
  .col-4{ grid-column:span 6; }
  .col-5{ grid-column:span 6; }
  .col-6{ grid-column:span 6; }
  .col-7{ grid-column:span 7; }
  .col-8{ grid-column:span 8; }
  .col-9{ grid-column:span 12; }
  .col-10{ grid-column:span 12; }
}
@media (min-width:1024px){
  .col-3{ grid-column:span 3; }
  .col-4{ grid-column:span 4; }
  .col-5{ grid-column:span 5; }
  .col-6{ grid-column:span 6; }
  .col-7{ grid-column:span 7; }
  .col-8{ grid-column:span 8; }
  .col-9{ grid-column:span 9; }
  .col-10{ grid-column:span 10; }
  .col-offset-1{ grid-column-start:2; }
  .col-offset-2{ grid-column-start:3; }
}

/* ---------- 分区 ---------- */
.section{
  position:relative;
  padding:clamp(52px,7vw,104px) 0;
  border-top:1px solid var(--line-paper);
}
.section--ink{
  background:var(--ink); color:var(--paper);
  border-top-color:var(--line-ink);
}
.section--ink .section-head__lead,
.section--ink .muted{ color:rgba(242,236,225,.7); }
.section--paper2{ background:var(--paper-2); }
.section--cut-top{ clip-path:polygon(0 var(--cut-a),100% 0,100% 100%,0 100%); }
.section--cut-bottom{ clip-path:polygon(0 0,100% 0,100% calc(100% - var(--cut-b)),0 100%); }
.section__inner{ width:100%; max-width:1440px; margin:0 auto; padding:0 var(--gutter); }

/* ---------- 章节头 / 页面头 ---------- */
.section-head{
  display:grid; grid-template-columns:1fr; gap:14px;
  margin-bottom:clamp(28px,3.4vw,52px);
}
@media (min-width:760px){
  .section-head{ grid-template-columns:110px minmax(0,1fr); gap:10px 24px; }
  .section-head__num{ grid-row:span 2; padding-top:12px; }
}
.section-head__num{
  font-family:var(--font-mono); font-size:12px; letter-spacing:.08em;
  color:var(--gold);
  padding-top:2px;
}
.section-head__title{ font-size:clamp(26px,3.6vw,46px); }
.section-head__lead{ color:var(--muted); max-width:64ch; font-size:16px; }

.page-head{
  padding:clamp(40px,5vw,76px) 0 clamp(24px,3vw,44px);
  display:grid; grid-template-columns:1fr; gap:14px;
}
@media (min-width:900px){
  .page-head{ grid-template-columns:minmax(0,8fr) minmax(0,4fr); align-items:end; gap:24px; }
}
.page-head__kicker{
  font-family:var(--font-mono); font-size:11px; letter-spacing:.22em;
  text-transform:uppercase; color:var(--gold);
}
.page-head__title{ font-size:clamp(32px,5vw,68px); }
.page-head__lead{ color:var(--muted); max-width:60ch; margin-top:14px; }
.page-head__meta{
  font-family:var(--font-mono); font-size:12px; letter-spacing:.08em; color:var(--steel);
  border-top:1px solid var(--line-paper); padding-top:12px;
}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex; flex-wrap:wrap; gap:8px; align-items:center;
  padding:20px 0;
  font-family:var(--font-mono); font-size:11px; letter-spacing:.1em; color:var(--muted);
}
.breadcrumb a{ text-decoration:none; color:var(--muted); border-bottom:1px solid transparent; transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease); }
.breadcrumb a:hover{ color:var(--teal-deep); border-bottom-color:var(--teal-deep); }
.breadcrumb li + li::before{ content:"/"; margin-right:8px; color:var(--gold); }

/* ---------- 卡片 ---------- */
.card{
  position:relative;
  background:#FBF7F0;
  border:1px solid var(--gold-soft);
  padding:clamp(20px,2.2vw,30px);
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.card:hover{
  transform:translateY(-3px);
  border-color:var(--gold);
  box-shadow:10px 14px 0 rgba(18,20,26,.10);
}
.card--ink{ background:var(--ink-2); border-color:var(--line-ink); color:var(--paper); }
.card__title{ font-size:clamp(18px,1.9vw,23px); margin-bottom:10px; }
.card__meta{ font-family:var(--font-mono); font-size:11px; letter-spacing:.08em; color:var(--muted); }
.card__body{ font-size:15.5px; line-height:1.8; }
.shift{ transform:translate(12px,12px); }

/* ---------- 标签 / 指标 ---------- */
.tag{
  display:inline-flex; align-items:center; gap:6px;
  padding:3px 10px;
  border:1px solid var(--line-paper); border-radius:0;
  font-family:var(--font-mono); font-size:11px; letter-spacing:.08em; color:var(--steel);
}
.tag--gold{ border-color:var(--gold); color:#8A6D28; }
.tag--cyan{ border-color:var(--cyan); color:var(--teal-deep); }
.tag--coral{ border-color:var(--coral); color:var(--coral-deep); }
.stat{ display:flex; flex-direction:column; gap:4px; padding:18px 0; border-top:1px solid var(--line-paper); }
.stat__num{ font-family:var(--font-mono); font-size:clamp(26px,3vw,40px); letter-spacing:.02em; color:var(--gold); line-height:1.1; }
.stat__label{ font-size:13.5px; color:var(--muted); }

/* ---------- 编辑部目录条 ---------- */
.toc{ border-top:1px solid var(--line-paper); }
.toc__item{
  display:flex; align-items:baseline; gap:16px;
  padding:16px 0; border-bottom:1px solid var(--line-paper);
  text-decoration:none; color:inherit;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease);
}
.toc__item::before{
  content:""; flex:0 0 auto; align-self:center;
  width:0; height:1px; background:var(--gold);
  transition:width var(--dur) var(--ease);
}
.toc__item:hover::before,
.toc__item:focus-visible::before{ width:24px; }
.toc__item:hover{ background:rgba(201,169,97,.08); }
.toc__num{ font-family:var(--font-mono); font-size:12px; letter-spacing:.08em; color:var(--gold); }
.toc__title{ font-family:var(--font-display); font-weight:800; font-size:clamp(17px,1.8vw,21px); letter-spacing:-.01em; }
.toc__meta{ margin-left:auto; font-family:var(--font-mono); font-size:11px; letter-spacing:.08em; color:var(--muted); }

/* ---------- 筛选索引条 ---------- */
.index-bar{
  display:flex; flex-wrap:wrap;
  border:1px solid var(--line-paper);
  background:rgba(251,247,240,.6);
}
.index-bar__btn{
  padding:12px 18px; border:0; border-right:1px solid var(--line-paper); border-radius:0;
  background:transparent; cursor:pointer;
  font-family:var(--font-mono); font-size:12px; letter-spacing:.08em; color:var(--muted);
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease);
}
.index-bar__btn:hover{ color:var(--ink); background:rgba(201,169,97,.14); }
.index-bar__btn[aria-pressed="true"],
.index-bar__btn[aria-selected="true"]{ background:var(--ink); color:var(--paper); }

/* ---------- 折叠 ---------- */
.accordion{ border-top:1px solid var(--line-paper); }
.accordion__item{ border-bottom:1px solid var(--line-paper); }
.accordion__trigger{
  width:100%; display:flex; align-items:baseline; gap:16px;
  padding:20px 0; background:transparent; border:0; border-radius:0;
  text-align:left; cursor:pointer; color:inherit;
  font-family:var(--font-display); font-weight:800; font-size:clamp(16px,1.7vw,20px); letter-spacing:-.01em;
  transition:color var(--dur) var(--ease);
}
.accordion__trigger:hover{ color:var(--teal-deep); }
.accordion__num{ font-family:var(--font-mono); font-weight:400; font-size:12px; letter-spacing:.08em; color:var(--gold); }
.accordion__label{ flex:1 1 auto; }
.accordion__trigger::after{
  content:"+"; font-family:var(--font-mono); font-size:16px; color:var(--gold);
  transition:transform var(--dur) var(--ease);
}
.accordion__item[data-open] .accordion__trigger::after{ content:"–"; }
.accordion__panel{ padding:0 0 24px 40px; }
.accordion__body{ font-size:15.5px; color:var(--muted); max-width:68ch; }

/* ---------- 图片容器（页面阶段放入图片） ---------- */
.media{
  position:relative; overflow:hidden;
  background:var(--ink-2);
  aspect-ratio:16 / 9;
}
.media--tall{ aspect-ratio:3 / 4; }
.media--square{ aspect-ratio:1 / 1; }
.media--wide{ aspect-ratio:21 / 9; }
.media > img,
.media > picture > img{
  position:absolute; inset:0; width:100%; height:100%;
  object-fit:cover; object-position:center;
}
.media__mask{
  position:absolute; inset:0;
  background:linear-gradient(180deg,rgba(18,20,26,.10) 0%,rgba(18,20,26,.72) 100%);
  transition:opacity var(--dur) var(--ease);
}
.media:hover .media__mask{ opacity:.88; }
.media__cap{
  position:absolute; left:0; bottom:0;
  padding:12px 16px;
  font-family:var(--font-mono); font-size:11px; letter-spacing:.1em; color:var(--paper);
}
.media--placeholder{
  background-image:
    repeating-linear-gradient(135deg,rgba(201,169,97,.20) 0 1px,transparent 1px 14px),
    linear-gradient(160deg,#232732 0%,#12141A 62%,#1B1F28 100%);
}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:clamp(48px,6vw,96px);
  background:var(--ink); color:var(--paper);
  border-top:1px solid var(--gold);
}
.footer-shell{
  max-width:1440px; margin:0 auto;
  padding:clamp(44px,5vw,80px) var(--gutter) clamp(26px,3vw,44px);
  display:grid; grid-template-columns:repeat(12,minmax(0,1fr)); gap:32px 24px;
}
.footer-brand{ grid-column:span 12; }
.footer-col{ grid-column:span 6; }
.footer-contact{ grid-column:span 12; }
@media (min-width:900px){
  .footer-brand{ grid-column:span 6; }
  .footer-col{ grid-column:span 3; }
  .footer-contact{ grid-column:span 6; }
}
@media (min-width:1100px){
  .footer-brand{ grid-column:span 4; }
  .footer-col{ grid-column:span 2; }
  .footer-contact{ grid-column:span 4; }
}
.footer-brand__mark{
  font-family:var(--font-display); font-weight:900;
  font-size:clamp(22px,2.4vw,28px); letter-spacing:-.02em; line-height:1.2;
}
.footer-brand__mark span{
  display:block;
  font-family:var(--font-mono); font-weight:400; font-size:10px;
  letter-spacing:.32em; color:var(--gold); margin-top:6px;
}
.footer-brand__line{ margin-top:14px; font-size:15px; color:rgba(242,236,225,.78); }
.footer-brand__note{
  margin-top:12px; padding-top:12px; border-top:1px solid var(--line-ink);
  font-family:var(--font-mono); font-size:11px; letter-spacing:.06em;
  color:rgba(242,236,225,.55);
}
.footer-col__title{
  font-family:var(--font-mono); font-weight:400;
  font-size:11px; letter-spacing:.22em; color:var(--gold);
  margin-bottom:16px;
}
.footer-col__list{ display:flex; flex-direction:column; gap:10px; }
.footer-link{
  display:inline-block;
  font-size:15px; color:rgba(242,236,225,.82); text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.footer-link:hover{ color:var(--cyan); border-bottom-color:var(--cyan); transform:translateX(3px); }
.footer-link--sm{ font-size:12.5px; font-family:var(--font-mono); letter-spacing:.06em; }
.footer-contact__list{ display:flex; flex-direction:column; gap:12px; }
.footer-contact__addr,
.footer-contact__hint{ font-size:14px; color:rgba(242,236,225,.7); line-height:1.7; }
.footer-contact__hint{ font-family:var(--font-mono); font-size:11.5px; letter-spacing:.04em; color:rgba(242,236,225,.5); }
.copy-btn{
  display:inline-flex; align-items:center; gap:10px;
  padding:2px 0; background:transparent; border:0; border-radius:0;
  border-bottom:1px dashed rgba(242,236,225,.35);
  color:var(--paper); cursor:pointer;
  font-family:var(--font-mono); font-size:13px; letter-spacing:.04em;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.copy-btn:hover{ color:var(--cyan); border-bottom-color:var(--cyan); }
.copy-btn__flag{
  font-size:10px; letter-spacing:.14em; color:var(--cyan);
  opacity:0; transition:opacity var(--dur) var(--ease);
}
.copy-btn[data-copied="true"]{ color:var(--cyan); border-bottom-color:var(--cyan); }
.copy-btn[data-copied="true"] .copy-btn__flag{ opacity:1; }
.footer-base{
  max-width:1440px; margin:0 auto;
  padding:20px var(--gutter) 32px;
  border-top:1px solid var(--line-ink);
  display:flex; flex-wrap:wrap; align-items:center; gap:12px 28px;
  font-family:var(--font-mono); font-size:11.5px; letter-spacing:.06em;
  color:rgba(242,236,225,.55);
}
.footer-base__links{ display:flex; flex-wrap:wrap; gap:18px; margin-left:auto; }

/* ---------- 显现动画 ---------- */
html.js [data-reveal]{
  opacity:0; transform:translateY(12px);
  transition:opacity 240ms var(--ease),transform 240ms var(--ease);
}
html.js [data-reveal].is-in{ opacity:1; transform:none; }

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  html.js [data-reveal]{ opacity:1; transform:none; }
  .btn:hover,.card:hover{ transform:none; }
}