:root{
  --ink:#12241D;
  --ink-2:#1E3A2E;
  --paper:#F6EFE3;
  --gold:#E08A1E;
  --gold-line:#F2C879;
  --cyan:#2C7C8C;
  --rose:#C4335E;
  --edge:#D8CDBB;
  --deep:#0B1512;
  --tag:#EDE3D2;
  --font-head:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans CJK SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans CJK SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:ui-monospace,"SF Mono",Menlo,Consolas,"Courier New",monospace;
  --wrap:1180px;
  --gutter:clamp(16px,4vw,40px);
  --ease:cubic-bezier(.2,.7,.3,1);
  --shadow-paper:6px 6px 0 rgba(18,36,29,.85);
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.8;
  letter-spacing:.01em;
  color:var(--deep);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,figure,blockquote,dl,dd{margin:0;}
h1,h2,h3,h4{
  font-family:var(--font-head);
  font-weight:900;
  line-height:1.25;
  letter-spacing:.02em;
  color:var(--deep);
}
ul,ol{margin:0;padding:0;list-style:none;}
img,svg,picture{max-width:100%;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;}
[hidden]{display:none !important;}
:focus-visible{outline:2px solid var(--gold-line);outline-offset:3px;border-radius:3px;}

.container{width:min(calc(100% - var(--gutter) * 2),var(--wrap));margin-inline:auto;}

/* ---------- 通用排版与节奏 ---------- */
.section{padding-block:clamp(52px,8vw,116px);}
.section--tight{padding-block:clamp(32px,4.5vw,66px);}
.section-head{position:relative;margin-bottom:clamp(20px,3vw,36px);}
.eyebrow{
  display:inline-block;
  font-size:12px;
  letter-spacing:.3em;
  text-indent:.3em;
  color:var(--gold);
  font-weight:700;
  margin-bottom:12px;
}
.lede{
  font-size:22px;
  line-height:1.7;
  color:rgba(11,21,18,.82);
  max-width:32em;
}
.rule{
  height:1px;
  border:0;
  margin:0;
  background:linear-gradient(90deg,var(--gold-line),rgba(216,205,187,0));
}
.annotation{
  writing-mode:vertical-rl;
  text-orientation:mixed;
  font-size:12px;
  letter-spacing:.3em;
  color:rgba(11,21,18,.5);
}
.annotation--light{color:rgba(246,239,227,.6);}
.plate-num{
  display:block;
  font-family:var(--font-head);
  font-size:clamp(56px,9vw,88px);
  font-weight:900;
  line-height:.9;
  letter-spacing:-.02em;
  color:rgba(224,138,30,.22);
  -webkit-text-stroke:1px rgba(224,138,30,.45);
  user-select:none;
}
.stack > * + *{margin-top:16px;}
.prose{max-width:34em;font-size:17px;line-height:1.85;}
.prose > * + *{margin-top:1.1em;}
.note{
  border-left:3px solid var(--gold-line);
  background:rgba(237,227,210,.6);
  padding:14px 18px;
  font-size:14px;
  line-height:1.8;
  color:rgba(11,21,18,.78);
  border-radius:0 8px 8px 0;
}
.fold{border-top:1px solid var(--edge);}
.fold > summary{
  cursor:pointer;
  list-style:none;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:14px 0;
  font-weight:700;
  font-size:15px;
}
.fold > summary::-webkit-details-marker{display:none;}
.fold > summary::after{
  content:"展开";
  font-size:12px;
  letter-spacing:.16em;
  color:#8A4A05;
  font-weight:700;
}
.fold[open] > summary::after{content:"收起";}

/* ---------- 网格 ---------- */
.grid{display:grid;gap:clamp(16px,2.4vw,28px);}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr));}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}
.grid--asym{grid-template-columns:minmax(0,5fr) minmax(0,7fr);}

/* ---------- 卡片 / 标签 / 按钮 ---------- */
.card{
  position:relative;
  background:var(--paper);
  color:var(--deep);
  border:1px solid var(--edge);
  border-radius:12px;
  padding:clamp(18px,2.4vw,26px);
  box-shadow:var(--shadow-paper);
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.card:hover{transform:translateY(-2px);border-color:var(--gold-line);box-shadow:6px 8px 0 rgba(18,36,29,.9);}
.card--ink{
  background:var(--ink-2);
  color:var(--paper);
  border-color:rgba(242,200,121,.35);
  box-shadow:6px 6px 0 rgba(11,21,18,.55);
}
.card--ink h3,.card--ink h2{color:var(--gold-line);}
.card-stack{position:relative;}
.card-stack::before,
.card-stack::after{
  content:"";
  position:absolute;
  inset:0;
  border-radius:12px;
  border:1px solid var(--edge);
  background:var(--paper);
  z-index:-1;
}
.card-stack::before{transform:translate(5px,5px);opacity:.7;}
.card-stack::after{transform:translate(10px,10px);opacity:.4;}

.tag{
  display:inline-flex;
  align-items:center;
  gap:.35em;
  padding:.18em .72em;
  border-radius:999px;
  font-size:12px;
  letter-spacing:.1em;
  background:var(--tag);
  color:var(--ink-2);
  border:1px solid rgba(18,36,29,.12);
}
.tag--gold{background:rgba(224,138,30,.16);color:#8A4A05;border-color:rgba(224,138,30,.45);}
.tag--cyan{background:rgba(44,124,140,.14);color:#1E5F6C;border-color:rgba(44,124,140,.4);}
.tag--rose{background:rgba(196,51,94,.12);color:#9E2549;border-color:rgba(196,51,94,.38);}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.55em;
  padding:.78em 1.5em;
  border-radius:999px;
  border:1px solid transparent;
  font-family:var(--font-head);
  font-size:14px;
  font-weight:800;
  letter-spacing:.08em;
  line-height:1.2;
  cursor:pointer;
  transition:transform .18s var(--ease),background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.btn:hover{transform:translateY(-2px);}
.btn--gold{
  background:var(--gold);
  color:#1A1206;
  box-shadow:inset 0 -2px 0 rgba(11,21,18,.22),0 3px 0 rgba(11,21,18,.28);
}
.btn--ghost{background:transparent;color:var(--ink);border-color:rgba(18,36,29,.35);}
.btn--ghost:hover{border-color:var(--gold);color:#8A4A05;}
.btn--rose{
  background:var(--rose);
  color:#FFF4EC;
  box-shadow:inset 0 -2px 0 rgba(11,21,18,.25),0 3px 0 rgba(11,21,18,.25);
}
.btn--on-ink{background:transparent;color:var(--gold-line);border-color:rgba(242,200,121,.55);}
.btn--on-ink:hover{background:rgba(242,200,121,.12);}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:.4em;
  font-size:14px;
  font-weight:700;
  letter-spacing:.06em;
  color:#8A4A05;
  border-bottom:1px solid rgba(224,138,30,.5);
  padding-bottom:2px;
}
.link-arrow::after{content:"→";transition:transform .2s var(--ease);}
.link-arrow:hover::after{transform:translateX(4px);}

/* ---------- 面包屑 / 索引 / 筛选 ---------- */
.breadcrumb{
  font-size:12px;
  letter-spacing:.14em;
  color:rgba(11,21,18,.55);
  padding-block:18px 0;
}
.breadcrumb ol{display:flex;flex-wrap:wrap;gap:.6em;}
.breadcrumb li + li::before{content:"/";margin-right:.6em;color:rgba(11,21,18,.3);}
.breadcrumb a:hover{color:#8A4A05;}

.toc{position:sticky;top:22px;align-self:start;}
.toc-title{
  font-size:12px;
  letter-spacing:.3em;
  color:rgba(11,21,18,.5);
  margin-bottom:14px;
}
.toc-list{display:flex;flex-direction:column;border-left:1px solid var(--edge);}
.toc-list a{
  display:block;
  padding:8px 0 8px 14px;
  margin-left:-1px;
  font-size:14px;
  line-height:1.5;
  color:rgba(11,21,18,.62);
  border-left:2px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.toc-list a:hover{color:var(--ink);}
.toc-list a[aria-current]{
  color:#8A4A05;
  border-left-color:var(--gold);
  font-weight:700;
}

.filter-bar{display:flex;flex-wrap:wrap;gap:8px;}
.filter-btn{
  padding:.45em 1.05em;
  border-radius:999px;
  border:1px solid rgba(18,36,29,.25);
  background:transparent;
  color:rgba(11,21,18,.75);
  font-size:13px;
  letter-spacing:.08em;
  cursor:pointer;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.filter-btn:hover{border-color:var(--gold);color:#8A4A05;}
.filter-btn[aria-pressed="true"]{background:var(--ink);color:var(--paper);border-color:var(--ink);}
.filter-empty{padding:24px 0;font-size:14px;color:rgba(11,21,18,.6);}

/* ---------- 图片容器基础规则 ---------- */
.media{
  position:relative;
  display:block;
  overflow:hidden;
  border-radius:14px;
  border:1px solid var(--edge);
  aspect-ratio:4/5;
  background:linear-gradient(155deg,#F6EFE3 0%,#EDE3D2 55%,#D8CDBB 100%);
}
.media--wide{aspect-ratio:16/10;}
.media--square{aspect-ratio:1/1;}
.media--tall{aspect-ratio:3/4;}
.media > img,
.media > svg,
.media > picture,
.media > picture > img{
  position:absolute;
  inset:0;
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media::after{
  content:"";
  position:absolute;
  inset:0;
  border-radius:inherit;
  box-shadow:inset 0 0 0 1px rgba(242,200,121,.35);
  pointer-events:none;
}

/* ---------- 头部 ---------- */
.site-header{
  position:relative;
  z-index:50;
  background:var(--ink);
  color:var(--paper);
  border-bottom:1px solid rgba(242,200,121,.35);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  background:linear-gradient(90deg,rgba(224,138,30,0),var(--gold),rgba(242,200,121,.2));
  opacity:.7;
}
.progress-bar{
  position:fixed;
  top:0;
  left:0;
  width:100%;
  height:3px;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--gold),var(--gold-line));
  z-index:200;
  pointer-events:none;
}
.skip-link{
  position:absolute;
  top:0;
  left:50%;
  transform:translate(-50%,-140%);
  z-index:130;
  background:var(--gold);
  color:#1A1206;
  font-size:14px;
  font-weight:700;
  letter-spacing:.06em;
  padding:10px 22px;
  border-radius:0 0 10px 10px;
  transition:transform .2s var(--ease);
}
.skip-link:focus{transform:translate(-50%,0);}

.header-tools{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:flex-end;
  gap:10px;
  width:min(calc(100% - var(--gutter) * 2),var(--wrap));
  margin-inline:auto;
  padding-top:14px;
}
.corner-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 13px 6px 11px;
  border-radius:999px;
  background:rgba(224,138,30,.16);
  border:1px solid rgba(242,200,121,.5);
  color:var(--gold-line);
  font-size:12px;
  letter-spacing:.14em;
  line-height:1.4;
  box-shadow:0 0 0 0 rgba(224,138,30,.4);
  animation:badge-pulse 6s ease-in-out infinite;
  transition:background-color .2s var(--ease),color .2s var(--ease);
}
.corner-badge::before{
  content:"";
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--gold);
  box-shadow:0 0 7px var(--gold);
  flex:none;
}
.corner-badge:hover{background:rgba(224,138,30,.3);color:#FFF3DF;}
@keyframes badge-pulse{
  0%,100%{box-shadow:0 0 0 0 rgba(224,138,30,.35);}
  50%{box-shadow:0 0 0 7px rgba(224,138,30,0);}
}
.copy-version{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:6px 11px;
  border-radius:9px;
  border:1px dashed rgba(242,200,121,.45);
  background:transparent;
  color:rgba(246,239,227,.82);
  font-size:12px;
  letter-spacing:.1em;
  line-height:1.4;
  cursor:pointer;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.copy-version:hover{color:var(--gold-line);border-color:var(--gold-line);}
.copy-version.is-copied{color:var(--gold-line);border-style:solid;border-color:var(--gold-line);}
.ver{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:.88em;
  font-weight:700;
  letter-spacing:.02em;
  padding:.06em .52em;
  border-radius:999px;
  background:var(--gold);
  color:#1A1206;
  line-height:1.5;
}

.masthead{
  text-align:center;
  padding:clamp(18px,2.6vw,32px) 0 clamp(16px,2.2vw,26px);
}
.masthead-brand{
  display:inline-flex;
  flex-direction:column;
  align-items:center;
  gap:10px;
}
.masthead-title{
  font-family:var(--font-head);
  font-size:clamp(34px,6vw,56px);
  font-weight:900;
  line-height:1.05;
  letter-spacing:.02em;
  color:var(--gold);
  -webkit-text-stroke:.5px rgba(242,200,121,.7);
  text-shadow:0 2px 0 rgba(11,21,18,.5);
}
.masthead-sub{
  font-size:12px;
  letter-spacing:.3em;
  text-indent:.3em;
  color:rgba(246,239,227,.72);
  line-height:1.6;
}
.masthead-brand:hover .masthead-title{color:var(--gold-line);}

.site-nav{
  background:rgba(30,58,46,.42);
  border-top:1px solid rgba(242,200,121,.25);
  border-bottom:1px solid rgba(242,200,121,.14);
}
.nav-list{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  width:min(calc(100% - var(--gutter) * 2),var(--wrap));
  margin-inline:auto;
}
.nav-list > li + li{border-left:1px solid rgba(242,200,121,.22);}
.nav-list a{
  position:relative;
  display:block;
  padding:15px clamp(12px,2vw,26px);
  font-size:14px;
  letter-spacing:.12em;
  color:rgba(246,239,227,.84);
  transition:color .2s var(--ease);
}
.nav-list a::after{
  content:"";
  position:absolute;
  left:50%;
  right:50%;
  bottom:8px;
  height:2px;
  background:var(--gold);
  transition:left .24s var(--ease),right .24s var(--ease);
}
.nav-list a:hover,
.nav-list a:focus-visible{color:var(--gold-line);}
.nav-list a:hover::after,
.nav-list a:focus-visible::after{left:14%;right:14%;}
.nav-list a[aria-current="page"]{color:var(--gold);font-weight:700;}
.nav-list a[aria-current="page"]::after{left:14%;right:14%;}

.nav-toggle{display:none;}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  overflow:hidden;
  background:var(--ink);
  color:rgba(246,239,227,.78);
  padding-top:clamp(44px,6.5vw,80px);
  border-top:1px solid rgba(242,200,121,.3);
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0 0 auto;
  height:3px;
  background:linear-gradient(90deg,var(--gold) 0%,var(--gold-line) 34%,rgba(196,51,94,.8) 68%,var(--cyan) 100%);
  opacity:.85;
}
.footer-inner{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.9fr) minmax(0,1.15fr);
  gap:clamp(24px,4vw,56px);
  padding-bottom:clamp(32px,5vw,56px);
}
.footer-logo{
  font-family:var(--font-head);
  font-size:22px;
  font-weight:900;
  letter-spacing:.06em;
  color:var(--gold);
}
.footer-tagline{
  margin-top:10px;
  font-size:13px;
  line-height:1.9;
  max-width:22em;
  color:rgba(246,239,227,.7);
}
.footer-cols{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:20px;
}
.footer-col-title{
  font-size:12px;
  font-weight:700;
  letter-spacing:.3em;
  color:var(--gold-line);
  margin-bottom:14px;
}
.footer-list{display:flex;flex-direction:column;gap:10px;}
.footer-list a{
  font-size:14px;
  color:rgba(246,239,227,.8);
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.footer-list a:hover{color:var(--gold-line);border-bottom-color:rgba(242,200,121,.6);}
.footer-contact-item{
  font-size:13px;
  line-height:1.9;
  color:rgba(246,239,227,.72);
  word-break:break-word;
}
.footer-contact-item + .footer-contact-item{margin-top:8px;}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:center;
  gap:8px 18px;
  width:min(calc(100% - var(--gutter) * 2),var(--wrap));
  margin-inline:auto;
  padding:18px 0 26px;
  border-top:1px solid rgba(242,200,121,.2);
  font-size:12px;
  letter-spacing:.08em;
  color:rgba(246,239,227,.55);
  text-align:center;
}
.footer-feedback a{
  color:var(--gold-line);
  border-bottom:1px solid rgba(242,200,121,.5);
}
.footer-feedback a:hover{color:#FFF3DF;}

/* ---------- 响应式 ---------- */
@media (max-width:1000px){
  .footer-inner{grid-template-columns:minmax(0,1fr) minmax(0,1.6fr);}
  .footer-contact{
    grid-column:1 / -1;
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:6px 20px;
  }
  .footer-contact .footer-col-title{grid-column:1 / -1;}
  .footer-contact-item + .footer-contact-item{margin-top:0;}
}

@media (max-width:860px){
  .grid--2,.grid--3,.grid--asym{grid-template-columns:minmax(0,1fr);}
  .prose{max-width:none;}

  .nav-toggle{
    display:flex;
    align-items:center;
    justify-content:center;
    gap:10px;
    width:min(calc(100% - var(--gutter) * 2),var(--wrap));
    margin:0 auto 16px;
    padding:11px 18px;
    border-radius:999px;
    border:1px solid rgba(242,200,121,.45);
    background:transparent;
    color:var(--paper);
    font-size:14px;
    letter-spacing:.18em;
    cursor:pointer;
    transition:border-color .2s var(--ease),color .2s var(--ease);
  }
  .nav-toggle:hover{border-color:var(--gold-line);color:var(--gold-line);}
  .nav-toggle__bars{
    position:relative;
    display:inline-block;
    width:16px;
    height:2px;
    background:currentColor;
    transition:background-color .2s var(--ease);
  }
  .nav-toggle__bars::before,
  .nav-toggle__bars::after{
    content:"";
    position:absolute;
    left:0;
    width:16px;
    height:2px;
    background:currentColor;
    transition:transform .2s var(--ease);
  }
  .nav-toggle__bars::before{top:-5px;}
  .nav-toggle__bars::after{top:5px;}
  .nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent;}
  .nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(5px) rotate(45deg);}
  .nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-5px) rotate(-45deg);}
  .nav-toggle__text{line-height:1.2;}

  .site-nav{display:none;border-top:1px solid rgba(242,200,121,.25);}
  .site-nav[data-open]{display:block;}
  .nav-list{flex-direction:column;}
  .nav-list > li + li{border-left:0;border-top:1px solid rgba(242,200,121,.14);}
  .nav-list a{padding:14px 20px;text-align:center;}
  .nav-list a::after{display:none;}
  .nav-list a[aria-current="page"]{background:rgba(224,138,30,.12);}
}

@media (max-width:680px){
  .footer-inner{grid-template-columns:minmax(0,1fr);}
  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px 16px;}
  .footer-contact{grid-template-columns:minmax(0,1fr);}
  .footer-bottom{flex-direction:column;gap:6px;}
}

@media (max-width:640px){
  body{font-size:16px;line-height:1.75;}
  .lede{font-size:17px;line-height:1.75;}
  .header-tools{justify-content:center;gap:8px;padding-top:10px;}
  .corner-badge{font-size:11px;letter-spacing:.08em;padding:5px 10px;}
  .copy-version{font-size:11px;letter-spacing:.06em;padding:5px 9px;}
  .masthead{padding:16px 0 14px;}
  .masthead-title{font-size:clamp(30px,9.5vw,42px);}
  .masthead-sub{font-size:11px;letter-spacing:.2em;}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .card:hover,.btn:hover{transform:none;}
  .corner-badge{animation:none;}
}