/* ============================================================
   心博赛事 · 共享样式  /assets/site.css
   堆叠面板式布局 / 居中刊头 / 框景刻度 / 夜场冷暖对比
   ============================================================ */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:140px;
}
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%}
button,input{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
strong,b{font-weight:700}

/* ---------- 2. 变量 ---------- */
:root{
  --ink:#0B1B2B;
  --ink-deep:#081522;
  --panel:#132B41;
  --slate:#1D3A52;
  --gold:#D8A93B;
  --gold-lite:#F0CE7A;
  --red:#D7263D;
  --yellow:#F2C230;
  --green:#2E7D5B;
  --magenta:#B2417A;
  --magenta-deep:#7A2E5C;
  --white:#EEF3F7;
  --muted:#8FA3B5;
  --line:rgba(143,163,181,.24);
  --line-soft:rgba(143,163,181,.14);
  --line-gold:rgba(216,169,59,.44);
  --mark:var(--gold);
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --font-narrow:"Archivo Narrow","Oswald","Arial Narrow",var(--font-sans);
  --w-max:1280px;
  --w-narrow:820px;
  --gutter:32px;
  --r-sm:6px;
  --r-md:14px;
  --r-lg:26px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
@media (max-width:860px){ :root{ --gutter:20px; } }

/* ---------- 3. 基础排版 ---------- */
body{
  min-height:100vh;
  background:
    radial-gradient(1180px 620px at 78% -12%, rgba(216,169,59,.10), transparent 62%),
    radial-gradient(920px 540px at 4% 14%, rgba(46,125,91,.10), transparent 64%),
    radial-gradient(700px 420px at 100% 84%, rgba(178,65,122,.07), transparent 66%),
    var(--ink);
  background-attachment:fixed;
  color:var(--white);
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.75;
  font-weight:400;
  letter-spacing:.005em;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    linear-gradient(transparent 0 96%, rgba(143,163,181,.045) 96% 100%),
    linear-gradient(90deg, transparent 0 96%, rgba(143,163,181,.045) 96% 100%);
  background-size:120px 120px;
  opacity:.7;
}
h1,h2,h3,h4{font-weight:800;letter-spacing:-.02em;line-height:1.18}
::selection{background:var(--gold);color:var(--ink)}

/* ---------- 4. 无障碍 ---------- */
:focus-visible{
  outline:2px solid var(--gold-lite);
  outline-offset:3px;
  border-radius:2px;
}
.visually-hidden{
  position:absolute!important;
  width:1px;height:1px;
  padding:0;margin:-1px;
  overflow:hidden;
  clip:rect(0 0 0 0);
  clip-path:inset(50%);
  white-space:nowrap;
  border:0;
}
.skip-link{
  position:fixed;
  left:16px;
  top:-80px;
  z-index:200;
  background:var(--gold);
  color:var(--ink);
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.1em;
  padding:11px 20px;
  border-radius:0 0 var(--r-sm) var(--r-sm);
  transition:top .2s var(--ease);
}
.skip-link:focus{ top:0; }

/* ---------- 5. 阅读进度 ---------- */
.read-progress{
  position:fixed;
  inset:0 0 auto 0;
  height:2px;
  z-index:120;
  pointer-events:none;
  background:rgba(143,163,181,.12);
}
.read-progress__bar{
  display:block;
  height:100%;
  width:0;
  background:linear-gradient(90deg,var(--gold) 0%,var(--gold-lite) 100%);
  transition:width .09s linear;
}

/* ---------- 6. 刊头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(11,27,43,.94);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.masthead__inner{
  max-width:var(--w-max);
  margin:0 auto;
  padding:20px var(--gutter) 12px;
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:16px;
}
.masthead__side{
  grid-column:1;
  justify-self:start;
  display:flex;
  align-items:center;
  gap:14px;
  min-width:0;
}
.masthead__meta{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--muted);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.brand{
  grid-column:2;
  justify-self:center;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:4px;
  text-align:center;
}
.brand__mark{
  font-size:clamp(24px,2.6vw,34px);
  font-weight:800;
  letter-spacing:.08em;
  line-height:1;
  color:var(--white);
}
.brand__mark em{ font-style:normal; color:var(--gold); }
.brand__latin{
  font-family:var(--font-mono);
  font-size:9.5px;
  letter-spacing:.36em;
  text-transform:uppercase;
  color:var(--muted);
  padding-left:.36em;
}
.masthead__utility{
  grid-column:3;
  justify-self:end;
  display:flex;
  align-items:center;
  gap:14px;
}
.utility-link{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.12em;
  color:var(--gold);
  padding-bottom:2px;
  border-bottom:1px solid var(--line-gold);
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.utility-link:hover{ color:var(--gold-lite); border-color:var(--gold-lite); }
.icon-btn{
  width:34px;height:34px;
  display:grid;
  place-items:center;
  border:1px solid var(--line);
  border-radius:50%;
  color:var(--muted);
  transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.icon-btn svg{ width:15px;height:15px; }
.icon-btn:hover{ color:var(--gold-lite); border-color:var(--line-gold); background:rgba(216,169,59,.08); }
.icon-btn[aria-expanded="true"]{ color:var(--ink); background:var(--gold); border-color:var(--gold); }

/* 收缩态 */
.site-header[data-scrolled="true"] .masthead__inner{ padding:9px var(--gutter) 7px; }
.site-header[data-scrolled="true"] .masthead__meta,
.site-header[data-scrolled="true"] .utility-link,
.site-header[data-scrolled="true"] .brand__latin{ display:none; }
.site-header[data-scrolled="true"] .brand__mark{ font-size:22px; }

/* ---------- 7. 导航 ---------- */
.site-nav{
  max-width:var(--w-max);
  margin:0 auto;
  padding:0 var(--gutter);
  border-top:1px solid var(--line-soft);
}
.site-nav__list{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:clamp(14px,2.4vw,40px);
}
.site-nav__link{
  position:relative;
  display:block;
  padding:10px 2px 14px;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.14em;
  color:var(--muted);
  white-space:nowrap;
  transition:color .2s var(--ease);
}
.site-nav__link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:8px;
  height:2px;
  background:var(--gold);
  transform:scaleX(0);
  transform-origin:center;
  transition:transform .28s var(--ease);
}
.site-nav__link:hover{ color:var(--white); }
.site-nav__link[aria-current="page"]{ color:var(--gold-lite); }
.site-nav__link[aria-current="page"]::after{ transform:scaleX(1); }

/* 汉堡 */
.nav-toggle{
  display:none;
  width:38px;height:38px;
  place-items:center;
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  color:var(--white);
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.nav-toggle:hover{ border-color:var(--line-gold); color:var(--gold-lite); }
.nav-toggle__bars{
  display:block;
  position:relative;
  width:16px;height:2px;
  background:currentColor;
  transition:background .22s var(--ease);
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;height:2px;
  background:currentColor;
  transition:transform .24s var(--ease),top .24s 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{ top:0; transform:rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{ top:0; transform:rotate(-45deg); }

/* ---------- 8. 栏目索引面板 ---------- */
.site-search{
  position:absolute;
  left:0;right:0;top:100%;
  max-height:min(72vh,540px);
  overflow-y:auto;
  background:var(--panel);
  border-top:1px solid var(--line-gold);
  border-bottom:1px solid var(--line);
  padding:22px var(--gutter) 26px;
  box-shadow:0 22px 48px rgba(0,0,0,.42);
}
.site-search[hidden]{ display:none; }
.site-search[data-open="true"]{ display:block; }
.site-search__inner{
  max-width:var(--w-max);
  margin:0 auto;
  display:grid;
  gap:16px;
}
.site-search__field{
  width:100%;
  padding:12px 15px;
  background:rgba(11,27,43,.72);
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  color:var(--white);
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.08em;
}
.site-search__field::placeholder{ color:rgba(143,163,181,.72); letter-spacing:.05em; }
.site-search__field:focus-visible{ outline:2px solid var(--gold); outline-offset:1px; border-color:var(--gold); }
.site-search__results{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(216px,1fr));
  gap:8px;
}
.site-search__results li[hidden]{ display:none; }
.site-search__link{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:12px;
  padding:10px 13px;
  border:1px solid var(--line-soft);
  border-radius:var(--r-sm);
  font-size:14.5px;
  color:var(--white);
  transition:border-color .2s var(--ease),color .2s var(--ease),background .2s var(--ease);
}
.site-search__link span{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.16em;
  color:var(--muted);
}
.site-search__link:hover{ border-color:var(--line-gold); color:var(--gold-lite); background:rgba(216,169,59,.06); }
.site-search__empty{
  display:none;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--muted);
}
.site-search__empty[data-visible="true"]{ display:block; }

/* ---------- 9. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(52px,7vw,104px);
  padding:clamp(38px,5vw,66px) 0 26px;
  background:linear-gradient(180deg, rgba(19,43,65,.55) 0%, var(--ink-deep) 58%);
  border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";
  position:absolute;
  left:0;right:0;top:-2px;
  height:2px;
  background:linear-gradient(90deg,transparent 0%,var(--gold) 24%,var(--gold-lite) 50%,var(--gold) 76%,transparent 100%);
  opacity:.62;
}
.footer__grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1.15fr;
  gap:clamp(24px,4vw,60px);
}
.footer__col{ min-width:0; }
.footer__brand{
  font-size:20px;
  font-weight:800;
  letter-spacing:.1em;
  color:var(--white);
}
.footer__tagline{
  margin-top:10px;
  max-width:34ch;
  font-size:14.5px;
  line-height:1.7;
  color:var(--muted);
}
.footer__icp{
  display:inline-block;
  margin-top:18px;
  padding:4px 11px;
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  color:var(--muted);
}
.footer__title{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--gold);
  margin-bottom:16px;
}
.footer__list li{ margin-bottom:9px; }
.footer__list a{
  font-size:14.5px;
  color:var(--muted);
  transition:color .2s var(--ease);
}
.footer__list a:hover{ color:var(--gold-lite); }
.footer__contact dt{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:rgba(143,163,181,.78);
}
.footer__contact dd{
  margin:3px 0 14px;
  font-size:14.5px;
  color:var(--white);
  word-break:break-word;
}
.footer__bottom{
  display:flex;
  flex-wrap:wrap;
  gap:12px 28px;
  justify-content:space-between;
  margin-top:clamp(28px,4vw,50px);
  padding-top:18px;
  border-top:1px solid var(--line-soft);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  color:var(--muted);
}

/* ---------- 10. 布局容器与网格 ---------- */
.container{
  width:100%;
  max-width:var(--w-max);
  margin:0 auto;
  padding:0 var(--gutter);
  position:relative;
  z-index:1;
}
.container--narrow{ max-width:var(--w-narrow); }
.grid-12{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:24px;
}
.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; }

/* ---------- 11. 堆叠面板 ---------- */
.panel{
  position:relative;
  padding:clamp(22px,3.2vw,44px);
  background:var(--panel);
  border:1px solid var(--line-soft);
  border-radius:var(--r-lg);
}
.panel + .panel{ margin-top:clamp(18px,2.6vw,34px); }
.panel--slate{ background:var(--slate); }
.panel--flush{ padding:0; overflow:hidden; }
.panel__label{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--gold);
}
.mono-label{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--muted);
}
.mono-label::before{
  content:"";
  width:18px;height:1px;
  background:var(--gold);
  flex:none;
}

/* 框景刻度 */
.frame-corners{ position:relative; }
.frame-corners::before,
.frame-corners::after{
  content:"";
  position:absolute;
  width:22px;height:22px;
  border:1px solid var(--mark);
  pointer-events:none;
  transition:border-color .32s var(--ease);
}
.frame-corners::before{ top:-1px; left:-1px; border-right:0; border-bottom:0; }
.frame-corners::after{ right:-1px; bottom:-1px; border-left:0; border-top:0; }
.frame-corners__marks{
  position:absolute;
  inset:0;
  pointer-events:none;
  display:block;
}
.frame-corners__marks::before,
.frame-corners__marks::after{
  content:"";
  position:absolute;
  width:22px;height:22px;
  border:1px solid var(--mark);
  transition:border-color .32s var(--ease);
}
.frame-corners__marks::before{ top:-1px; right:-1px; border-left:0; border-bottom:0; }
.frame-corners__marks::after{ bottom:-1px; left:-1px; border-right:0; border-top:0; }

[data-section]{ --mark:rgba(143,163,181,.34); }
[data-section].is-active{ --mark:var(--gold); }

/* 斜向分割带 */
.slash-band{
  position:relative;
  height:clamp(46px,7vw,92px);
  margin:clamp(20px,3vw,40px) 0;
  background:linear-gradient(100deg, rgba(29,58,82,.95) 0%, rgba(29,58,82,0) 64%);
  clip-path:polygon(0 32%,100% 0,100% 68%,0 100%);
}
.slash-band--accent{
  background:linear-gradient(100deg, rgba(216,169,59,.34) 0%, rgba(216,169,59,0) 62%);
}

/* ---------- 12. 标题与数字 ---------- */
.section-title{
  margin-top:14px;
  font-size:clamp(28px,3.4vw,46px);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.14;
}
.subhead{
  font-size:clamp(20px,2vw,24px);
  font-weight:700;
  letter-spacing:-.01em;
  line-height:1.35;
}
.stat{ display:grid; gap:6px; }
.stat__value{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:clamp(46px,8vw,118px);
  font-weight:600;
  line-height:.92;
  letter-spacing:-.03em;
  color:var(--gold-lite);
}
.stat__unit{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.16em;
  color:var(--muted);
}
.stat__label{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--muted);
}

/* ---------- 13. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:9px;
  padding:12px 24px;
  border:1px solid transparent;
  border-radius:999px;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.14em;
  white-space:nowrap;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
}
.btn--gold{
  background:var(--gold);
  color:var(--ink);
  font-weight:600;
}
.btn--gold:hover{ background:var(--gold-lite); transform:translateY(-1px); }
.btn--ghost{
  border-color:var(--line-gold);
  color:var(--gold-lite);
}
.btn--ghost:hover{ background:rgba(216,169,59,.12); border-color:var(--gold); }

/* ---------- 14. 标签 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 11px;
  border:1px solid currentColor;
  border-radius:999px;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.14em;
  line-height:1.7;
  white-space:nowrap;
}
.tag--gold{ color:var(--gold); }
.tag--red{ color:var(--red); }
.tag--yellow{ color:var(--yellow); }
.tag--green{ color:var(--green); }
.tag--magenta{ color:#E08BB4; }

/* ---------- 15. 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:9px;
  padding:24px 0 0;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  color:var(--muted);
}
.breadcrumb__item{
  display:inline-flex;
  align-items:center;
  gap:9px;
}
.breadcrumb__item + .breadcrumb__item::before{
  content:"/";
  color:rgba(143,163,181,.42);
}
.breadcrumb__item a{ color:var(--muted); transition:color .2s var(--ease); }
.breadcrumb__item a:hover{ color:var(--gold-lite); }
.breadcrumb__item [aria-current="page"]{ color:var(--white); }

/* ---------- 16. 正文排版 ---------- */
.prose{
  max-width:72ch;
  font-size:16.5px;
  line-height:1.75;
}
.prose p{ margin-bottom:1em; }
.prose p:last-child{ margin-bottom:0; }
.prose h2{
  font-size:clamp(24px,2.6vw,32px);
  margin:1.7em 0 .6em;
  letter-spacing:-.02em;
}
.prose h3{
  font-size:clamp(19px,1.9vw,22px);
  margin:1.4em 0 .5em;
}
.prose ul,.prose ol{
  list-style:disc;
  padding-left:1.35em;
  margin-bottom:1em;
}
.prose ol{ list-style:decimal; }
.prose li{ margin-bottom:.42em; }
.prose strong{ color:var(--gold-lite); }
.prose a{
  color:var(--gold);
  border-bottom:1px solid var(--line-gold);
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.prose a:hover{ color:var(--gold-lite); border-color:var(--gold-lite); }
.prose blockquote{
  border-left:2px solid var(--gold);
  padding:4px 0 4px 18px;
  color:var(--muted);
  margin:1.2em 0;
}
.prose code{
  font-family:var(--font-mono);
  font-size:.92em;
  color:var(--gold-lite);
  background:rgba(216,169,59,.09);
  padding:1px 6px;
  border-radius:3px;
}

/* ---------- 17. 图片容器基础规则 ---------- */
.media-frame{
  position:relative;
  display:block;
  width:100%;
  aspect-ratio:16/9;
  overflow:hidden;
  border-radius:var(--r-md);
  border:1px solid var(--line-soft);
  background:linear-gradient(142deg,#16283a 0%,#0d1c2b 100%);
}
.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(.82) contrast(1.05) brightness(.94);
}
.media-frame--wide{ aspect-ratio:21/9; }
.media-frame--tall{ aspect-ratio:4/5; }
.media-frame--square{ aspect-ratio:1/1; }
.media-frame__caption{
  margin-top:9px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  color:var(--muted);
}

/* ---------- 18. 显现动效 ---------- */
html.js [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .24s var(--ease),transform .24s var(--ease);
}
html.js [data-reveal].is-visible{
  opacity:1;
  transform:none;
}

/* ---------- 19. 响应式 ---------- */
@media (max-width:1040px){
  .grid-12{ grid-template-columns:repeat(6,1fr); gap:20px; }
  .col-4,.col-5,.col-6,.col-7,.col-8{ grid-column:span 6; }
  .footer__grid{ grid-template-columns:1fr 1fr; }
  .footer__col--brand{ grid-column:1 / -1; }
}

@media (max-width:880px){
  html{ scroll-padding-top:96px; }
  .masthead__inner{
    grid-template-columns:40px minmax(0,1fr) auto;
    gap:10px;
    padding:12px var(--gutter) 10px;
  }
  .masthead__side{ grid-column:1; gap:0; }
  .masthead__meta{ display:none; }
  .nav-toggle{ display:grid; }
  .brand{ grid-column:2; }
  .masthead__utility{ grid-column:3; gap:8px; }
  .utility-link{ display:none; }
  .brand__latin{ display:none; }

  .site-nav{
    position:absolute;
    left:0;right:0;top:100%;
    display:block;
    padding:0;
    background:var(--panel);
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
    max-height:0;
    overflow:hidden;
    visibility:hidden;
    box-shadow:0 24px 40px rgba(0,0,0,.4);
    transition:max-height .32s var(--ease),visibility .32s var(--ease);
  }
  .site-nav[data-open="true"]{
    max-height:76vh;
    overflow-y:auto;
    visibility:visible;
  }
  .site-nav__list{
    flex-direction:column;
    gap:0;
    padding:6px var(--gutter) 18px;
  }
  .site-nav__list li{ border-bottom:1px solid var(--line-soft); }
  .site-nav__link{
    padding:15px 0 15px 16px;
    font-size:14px;
  }
  .site-nav__link::after{ display:none; }
  .site-nav__link[aria-current="page"]{ color:var(--gold-lite); }
  .site-nav__link[aria-current="page"]::before{
    content:"";
    position:absolute;
    left:0;top:50%;
    width:6px;height:6px;
    margin-top:-3px;
    background:var(--gold);
    transform:rotate(45deg);
  }
  .site-search{ padding:18px var(--gutter) 22px; }
  .site-search__results{ grid-template-columns:1fr; }
}

@media (max-width:640px){
  body{ font-size:16px; }
  .grid-12{ grid-template-columns:1fr; gap:16px; }
  .col-4,.col-5,.col-6,.col-7,.col-8,.col-12{ grid-column:span 1; }
  .panel{ border-radius:var(--r-md); }
  .footer__grid{ grid-template-columns:1fr; }
  .footer__bottom{ flex-direction:column; gap:8px; }
  .brand__mark{ letter-spacing:.05em; }
}

/* ---------- 20. 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;
    transition-delay:0ms!important;
  }
  html.js [data-reveal]{ opacity:1; transform:none; }
  .read-progress__bar{ transition:none; }
}