/* =========================================================
   皇官方版口 · palace-huang.com.cn
   /assets/site.css —— 共享外壳：reset / 变量 / 中文排版 /
   命令栏头部 / 页脚 / 按钮 / 面包屑 / 网格 / 基础组件
   ========================================================= */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --c-red:#8C1F28;
  --c-red-deep:#71161F;
  --c-gold:#C08A2E;
  --c-lapis:#1B3A6B;
  --c-ink:#0E1A2F;
  --c-butter:#F7F1E4;
  --c-stone:#EBE2D2;
  --c-jade:#2E7D6E;
  --c-hemp:#6B5B4A;
  --c-white:#FFFFFF;
  --c-night:#07101F;

  --bg:var(--c-butter);
  --fg:var(--c-ink);
  --muted:var(--c-hemp);
  --line:rgba(107,91,74,.26);
  --line-ink:rgba(14,26,47,.34);
  --line-gold:rgba(192,138,46,.32);
  --on-dark:rgba(247,241,228,.80);

  --shell-max:1180px;
  --gutter:24px;
  --bar-h:60px;

  --font-serif:'Noto Serif SC','Source Han Serif SC','Songti SC','STSong','SimSun',serif;
  --font-sans:'Noto Sans SC','Source Han Sans SC','PingFang SC','Hiragino Sans GB','Microsoft YaHei',system-ui,sans-serif;

  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow-soft:0 1px 0 rgba(14,26,47,.05),0 16px 28px -22px rgba(14,26,47,.45);
}

/* ---------- 2. reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--fg);
  font-family:var(--font-sans);
  font-size:16px;
  font-weight:400;
  line-height:1.9;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
h1,h2,h3,h4{margin:0;font-family:var(--font-serif);font-weight:600;line-height:1.3;color:var(--c-ink)}
h1{font-size:56px}
h2{font-size:38px}
h3{font-size:26px}
h4{font-size:20px}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
img,picture,video{display:block;max-width:100%}
hr{border:0;height:1px;background:var(--line);margin:0}
:focus-visible{outline:2px solid var(--c-gold);outline-offset:3px;border-radius:2px}
::selection{background:rgba(140,31,40,.16);color:var(--c-ink)}

/* ---------- 3. 容器与排版 ---------- */
.shell{
  width:100%;
  max-width:var(--shell-max);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.eyebrow{
  font-family:var(--font-sans);
  font-size:12px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--c-gold);
}
.note{font-size:14px;line-height:1.85;color:var(--muted)}
.divider{height:1px;background:var(--line);border:0;margin:0}

.prose{max-width:68ch;color:var(--c-ink);font-size:16px;line-height:1.9}
.prose p+p{margin-top:1em}
.prose h2{font-size:26px;margin:1.9em 0 .6em}
.prose h3{font-size:20px;margin:1.6em 0 .5em}
.prose ul{display:grid;gap:8px;margin-top:1em}
.prose li{position:relative;padding-left:18px}
.prose li::before{content:"";position:absolute;left:0;top:.86em;width:8px;height:1px;background:var(--c-gold)}
.prose a{color:var(--c-red);border-bottom:1px solid rgba(140,31,40,.35)}
.prose a:hover{border-bottom-color:var(--c-red)}
.section--deep .prose,.panel--deep .prose,.panel--lapis .prose{color:var(--on-dark)}
.section--deep .prose h2,.section--deep .prose h3,
.panel--deep .prose h2,.panel--deep .prose h3,
.panel--lapis .prose h2,.panel--lapis .prose h3{color:var(--c-butter)}

/* ---------- 4. 画板级区块 ---------- */
.section{padding-block:96px}
.section--canvas{background:var(--c-butter)}
.section--tint{background:var(--c-stone)}
.section--deep{background:var(--c-ink);color:var(--on-dark)}
.section__head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:12px 20px;
  padding-bottom:26px;
  margin-bottom:40px;
  border-bottom:1px solid var(--line);
}
.section__head .lede{flex:1 1 340px}
.section-index{
  font-family:var(--font-sans);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--c-gold);
  font-variant-numeric:tabular-nums;
}
.section-title{font-size:38px;letter-spacing:.02em}
.lede{font-size:17px;line-height:1.85;color:var(--muted);max-width:60ch}
.section--deep .section__head{border-bottom-color:var(--line-gold)}
.section--deep .section-title{color:var(--c-butter)}
.section--deep .lede{color:rgba(247,241,228,.7)}
.section--tint .section__head{border-bottom-color:rgba(107,91,74,.32)}

/* ---------- 5. 12 栏网格 ---------- */
.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:24px}
.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-12{grid-column:span 12}

/* ---------- 6. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 22px;
  border:1px solid transparent;
  border-radius:2px;
  font-size:15px;
  font-weight:500;
  line-height:1.4;
  letter-spacing:.04em;
  transition:background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease);
}
.btn--primary{background:var(--c-red);border-color:var(--c-red);color:var(--c-white)}
.btn--primary:hover{background:var(--c-red-deep);border-color:var(--c-red-deep)}
.btn--ghost{border-color:var(--line-ink);color:var(--c-ink)}
.btn--ghost:hover{background:var(--c-ink);border-color:var(--c-ink);color:var(--c-butter)}
.section--deep .btn--ghost,.panel--deep .btn--ghost,.panel--lapis .btn--ghost{
  border-color:var(--line-gold);color:var(--c-butter);
}
.section--deep .btn--ghost:hover,.panel--deep .btn--ghost:hover,.panel--lapis .btn--ghost:hover{
  background:var(--c-gold);border-color:var(--c-gold);color:var(--c-night);
}
.btn--quiet{
  padding:8px 0;
  border:0;
  border-bottom:1px solid rgba(140,31,40,.4);
  border-radius:0;
  color:var(--c-red);
}
.btn--quiet:hover{border-bottom-color:var(--c-red);color:var(--c-red-deep)}

/* ---------- 7. 面板 / 入口卡 / 标签 / 数据 ---------- */
.panel{
  padding:32px;
  background:var(--c-white);
  border:1px solid var(--line);
  border-radius:2px;
}
.panel--tint{background:var(--c-stone);border-color:rgba(107,91,74,.22)}
.panel--lapis{background:var(--c-lapis);border-color:var(--line-gold);color:var(--on-dark)}
.panel--deep{background:var(--c-ink);border-color:var(--line-gold);color:var(--on-dark)}
.panel--lapis h2,.panel--lapis h3,.panel--lapis h4,
.panel--deep h2,.panel--deep h3,.panel--deep h4{color:var(--c-butter)}

.entry-card{
  position:relative;
  display:flex;
  flex-direction:column;
  gap:10px;
  padding:26px 24px;
  background:var(--c-white);
  border:1px solid var(--line);
  border-radius:2px;
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease),transform .25s var(--ease);
}
.entry-card:hover{border-color:rgba(140,31,40,.45);box-shadow:var(--shadow-soft);transform:translateY(-2px)}
.entry-card__index{font-size:12px;letter-spacing:.16em;color:var(--c-gold);font-variant-numeric:tabular-nums}
.entry-card__title{font-family:var(--font-serif);font-size:22px;color:var(--c-ink);line-height:1.4}
.entry-card__text{font-size:15px;line-height:1.85;color:var(--muted)}
.entry-card__meta{margin-top:auto;padding-top:14px;font-size:13px;letter-spacing:.06em;color:var(--c-jade)}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 10px;
  border:1px solid rgba(107,91,74,.3);
  border-radius:999px;
  font-size:12px;
  letter-spacing:.12em;
  line-height:1.7;
  color:var(--muted);
}
.tag--jade{border-color:rgba(46,125,110,.45);color:var(--c-jade)}
.tag--red{border-color:rgba(140,31,40,.4);color:var(--c-red)}

.stat{display:grid;gap:4px;font-variant-numeric:tabular-nums}
.stat__num{font-family:var(--font-serif);font-size:38px;line-height:1.1;color:var(--c-red)}
.stat__label{font-size:13px;letter-spacing:.1em;color:var(--muted)}

/* ---------- 8. 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  padding-block:20px;
  font-size:13px;
  letter-spacing:.04em;
  color:var(--muted);
}
.breadcrumb__link{color:var(--muted)}
.breadcrumb__link:hover{color:var(--c-red)}
.breadcrumb__sep{color:var(--c-gold)}
.breadcrumb [aria-current="page"]{color:var(--c-ink)}

/* ---------- 9. 图片容器与肌理 ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:2px;
  background:linear-gradient(150deg,rgba(27,58,107,.16),rgba(192,138,46,.14));
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:2;
  pointer-events:none;
  background-image:
    repeating-linear-gradient(90deg,rgba(14,26,47,.07) 0 1px,transparent 1px 44px),
    repeating-linear-gradient(0deg,rgba(14,26,47,.06) 0 1px,transparent 1px 44px);
}
.media-frame__asset{
  position:relative;
  z-index:1;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame--wide{aspect-ratio:16/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}

.tex-weave,.tex-paper{position:relative}
.tex-weave::before,.tex-paper::before{content:"";position:absolute;inset:0;pointer-events:none}
.tex-weave::before{
  background-image:
    repeating-linear-gradient(90deg,rgba(247,241,228,.09) 0 1px,transparent 1px 38px),
    repeating-linear-gradient(0deg,rgba(247,241,228,.07) 0 1px,transparent 1px 38px);
}
.tex-paper::before{
  background-image:repeating-linear-gradient(115deg,rgba(107,91,74,.055) 0 2px,transparent 2px 7px);
}
.tex-weave>*,.tex-paper>*{position:relative;z-index:1}

/* ---------- 10. 顶端命令栏 ---------- */
.skip-link{
  position:absolute;
  left:16px;
  top:-72px;
  z-index:120;
  padding:10px 18px;
  background:var(--c-red);
  color:var(--c-white);
  font-size:14px;
  border-radius:2px;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:12px}

.site-header{position:sticky;top:0;z-index:90}

.command-bar{
  position:relative;
  background:var(--c-night);
  color:var(--c-butter);
  border-bottom:1px solid var(--line-gold);
}
.command-bar__inner{
  display:flex;
  align-items:center;
  gap:18px;
  min-height:var(--bar-h);
  transition:min-height .3s var(--ease);
}
.site-header[data-scrolled="true"] .command-bar__inner{min-height:50px}

.brand{display:flex;align-items:center;gap:10px;margin-right:auto;flex:0 0 auto;color:var(--c-butter)}
.brand__mark{
  display:grid;
  place-items:center;
  width:30px;
  height:30px;
  border:1px solid rgba(192,138,46,.5);
  border-radius:2px;
  background:rgba(247,241,228,.04);
}
.brand__glyph{width:18px;height:18px}
.brand__text{display:flex;align-items:center;gap:9px}
.brand__name{
  font-family:var(--font-serif);
  font-size:17px;
  font-weight:600;
  letter-spacing:.08em;
  line-height:1.2;
}
.brand__tag{
  padding:1px 7px;
  border:1px solid rgba(192,138,46,.5);
  border-radius:2px;
  font-size:11px;
  letter-spacing:.16em;
  line-height:1.7;
  color:var(--c-gold);
  white-space:nowrap;
}

.command-bar__status{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  letter-spacing:.14em;
  color:rgba(247,241,228,.6);
}
.status-dot{
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--c-jade);
  box-shadow:0 0 0 3px rgba(46,125,110,.2);
}
.status-value{
  font-family:var(--font-serif);
  font-size:13px;
  letter-spacing:.1em;
  color:var(--c-butter);
}

.nav-toggle{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:8px 14px;
  border:1px solid rgba(192,138,46,.5);
  border-radius:2px;
  color:var(--c-butter);
  font-size:12px;
  letter-spacing:.16em;
  line-height:1.6;
  transition:background .25s var(--ease),border-color .25s var(--ease),color .25s var(--ease);
}
.nav-toggle:hover{background:rgba(192,138,46,.14);border-color:var(--c-gold)}
.nav-toggle[aria-expanded="true"]{background:var(--c-red);border-color:var(--c-red);color:var(--c-white)}
.nav-toggle__bars{display:grid;gap:3px;width:14px}
.nav-toggle__bars span{display:block;height:1px;background:currentColor}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){opacity:.35}

.command-bar__progress{
  position:absolute;
  left:0;
  bottom:-1px;
  width:0;
  height:2px;
  background:linear-gradient(90deg,var(--c-red),var(--c-gold));
  transition:width .12s linear;
}

/* ---------- 11. 索引式导航面板 ---------- */
.site-nav{
  display:none;
  max-height:calc(100vh - var(--bar-h));
  overflow:auto;
  overscroll-behavior:contain;
  background:var(--c-ink);
  color:var(--c-butter);
  border-bottom:1px solid var(--line-gold);
}
.site-nav[data-open="true"]{display:block;animation:navIn .28s var(--ease) both}
@keyframes navIn{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}
.site-nav__inner{padding-block:26px 32px}
.site-nav__legend{
  display:flex;
  align-items:center;
  gap:12px;
  margin-bottom:18px;
  font-size:12px;
  letter-spacing:.14em;
  color:rgba(247,241,228,.55);
}
.site-nav__legend::after{content:"";flex:1;height:1px;background:var(--line-gold)}

.site-nav__list{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:1px;
  background:rgba(192,138,46,.22);
  border:1px solid rgba(192,138,46,.22);
}
.site-nav__list>li{background:var(--c-ink)}
.nav-link{
  display:flex;
  align-items:baseline;
  gap:14px;
  padding:16px 18px;
  border-left:2px solid transparent;
  transition:background .25s var(--ease),border-color .25s var(--ease),color .25s var(--ease);
}
.nav-link__index{
  flex:0 0 auto;
  width:2.4em;
  text-align:right;
  font-size:12px;
  letter-spacing:.1em;
  font-variant-numeric:tabular-nums;
  color:var(--c-gold);
}
.nav-link__label{font-family:var(--font-serif);font-size:18px;letter-spacing:.06em}
.nav-link:hover{background:rgba(247,241,228,.06);border-left-color:var(--c-gold)}
.nav-link[aria-current="page"]{background:var(--c-red);border-left-color:var(--c-gold);color:var(--c-white)}
.nav-link[aria-current="page"] .nav-link__index{color:rgba(255,255,255,.8)}

.site-nav__actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.quick-action{
  display:inline-flex;
  align-items:center;
  padding:9px 20px;
  border:1px solid rgba(192,138,46,.5);
  border-radius:999px;
  font-size:15px;
  font-weight:500;
  letter-spacing:.04em;
  color:var(--c-butter);
  transition:background .25s var(--ease),border-color .25s var(--ease),color .25s var(--ease);
}
.quick-action:hover{background:var(--c-gold);border-color:var(--c-gold);color:var(--c-night)}

/* ---------- 12. 移动端底部快捷栏 ---------- */
.mobile-dock{
  position:fixed;
  left:0;
  right:0;
  bottom:0;
  z-index:95;
  display:none;
  grid-template-columns:repeat(3,1fr);
  background:var(--c-night);
  border-top:1px solid var(--line-gold);
  box-shadow:0 -14px 26px -20px rgba(7,16,31,.95);
  padding-bottom:env(safe-area-inset-bottom);
}
.mobile-dock__item{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:5px;
  padding:10px 4px 11px;
  font-size:12px;
  letter-spacing:.1em;
  color:rgba(247,241,228,.7);
}
.mobile-dock__item[aria-current="page"]{color:var(--c-white)}
.mobile-dock__dot{
  width:5px;
  height:5px;
  border-radius:50%;
  background:rgba(247,241,228,.32);
}
.mobile-dock__item[aria-current="page"] .mobile-dock__dot{
  background:var(--c-jade);
  box-shadow:0 0 0 3px rgba(46,125,110,.24);
}

/* ---------- 13. 页脚 ---------- */
.site-footer{
  background:var(--c-ink);
  color:var(--on-dark);
  border-top:1px solid var(--line-gold);
}
.footer__inner{padding-block:64px 0}
.footer__brand{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:16px 40px;
  padding-bottom:30px;
  margin-bottom:42px;
  border-bottom:1px solid var(--line-gold);
}
.footer__brand-name{
  font-family:var(--font-serif);
  font-size:26px;
  letter-spacing:.08em;
  line-height:1.3;
  color:var(--c-butter);
}
.footer__brand-note{font-size:14px;line-height:1.85;color:rgba(247,241,228,.6);max-width:42ch}

.footer__cols{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:36px 28px;
  padding-bottom:48px;
}
.footer__col{min-width:0}
.footer__heading{
  margin-bottom:14px;
  font-family:var(--font-sans);
  font-size:12px;
  font-weight:500;
  letter-spacing:.16em;
  color:var(--c-gold);
}
.footer__list{display:grid;gap:9px}
.footer__link{
  font-size:15px;
  color:var(--on-dark);
  border-bottom:1px solid transparent;
  transition:color .22s var(--ease),border-color .22s var(--ease);
}
.footer__link:hover{color:var(--c-butter);border-bottom-color:var(--c-gold)}

.footer__contact{display:grid;gap:10px}
.contact-line{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:10px;
  align-items:baseline;
  font-size:15px;
  font-variant-numeric:tabular-nums;
}
.contact-line__key{font-size:12px;letter-spacing:.14em;color:var(--c-gold)}
.contact-line__val{color:rgba(247,241,228,.84);word-break:break-word}
.footer__note{
  margin-top:16px;
  padding-top:14px;
  border-top:1px solid rgba(192,138,46,.22);
  font-size:14px;
  line-height:1.85;
  color:rgba(247,241,228,.55);
}

.footer__meta{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:10px 24px;
  padding-block:22px 26px;
  border-top:1px solid rgba(192,138,46,.22);
  font-size:13px;
  letter-spacing:.06em;
  color:rgba(247,241,228,.55);
}
.footer__icp{font-variant-numeric:tabular-nums}
.footer__copy{font-variant-numeric:tabular-nums}

/* ---------- 14. 滚动显现 ---------- */
.js-reveal [data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .45s var(--ease),transform .45s var(--ease);
}
.js-reveal [data-reveal].is-visible{opacity:1;transform:translateY(0)}

/* ---------- 15. 平板 ---------- */
@media (max-width:1024px){
  h1{font-size:42px}
  h2{font-size:30px}
  .section{padding-block:76px}
  .section-title{font-size:30px}
  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr));gap:20px}
  .col-3,.col-4{grid-column:span 3}
  .col-5{grid-column:span 6}
  .col-6{grid-column:span 6}
  .col-7{grid-column:span 6}
  .col-8{grid-column:span 6}
  .site-nav__list{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer__cols{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px 24px}
  .footer__inner{padding-block:56px 0}
}

/* ---------- 16. 手机 ---------- */
@media (max-width:720px){
  :root{--gutter:18px}
  h1{font-size:32px}
  h2{font-size:24px}
  h3{font-size:20px}
  h4{font-size:18px}
  .section{padding-block:64px}
  .section-title{font-size:24px}
  .section__head{margin-bottom:30px;padding-bottom:20px}
  .lede{font-size:16px}

  .grid-12{grid-template-columns:minmax(0,1fr);gap:18px}
  .col-3,.col-4,.col-5,.col-6,.col-7,.col-8,.col-12{grid-column:span 1}

  .command-bar__status{display:none}
  .brand__name{font-size:16px}
  .nav-toggle{padding:8px 11px;letter-spacing:.12em}
  .site-nav{max-height:calc(100vh - 110px)}
  .site-nav__list{grid-template-columns:minmax(0,1fr)}
  .nav-link{padding:14px 16px}
  .nav-link__label{font-size:17px}

  .mobile-dock{display:grid}
  body{padding-bottom:calc(64px + env(safe-area-inset-bottom))}

  .footer__inner{padding-block:48px 0}
  .footer__brand{margin-bottom:32px;padding-bottom:24px}
  .footer__brand-name{font-size:22px}
  .footer__cols{grid-template-columns:minmax(0,1fr);gap:28px;padding-bottom:36px}
  .footer__meta{flex-direction:column;align-items:flex-start;padding-block:20px 24px}

  .panel{padding:22px}
  .entry-card{padding:22px 20px}
  .breadcrumb{padding-block:16px}
}

/* ---------- 17. reduced motion ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms!important;
    animation-iteration-count:1!important;
    transition-duration:.01ms!important;
    scroll-behavior:auto!important;
  }
  .js-reveal [data-reveal]{opacity:1!important;transform:none!important}
  .command-bar__progress{transition:none}
  .site-nav[data-open="true"]{animation:none}
}