/* ==========================================================================
   千嬴国际官 · 共享样式 /assets/site.css
   深靛蓝近单色体系 + 暖金强调 + 左侧年份轴书脊
   ========================================================================== */

:root{
  --ink-900:#0B1226;
  --ink-800:#131D3A;
  --ink-700:#1B2749;
  --ink-600:#2E3E6B;
  --gold:#C9A24A;
  --gold-soft:#E7CB8A;
  --porcelain:#F5F2E9;
  --porcelain-dim:#CFCABB;
  --cinnabar:#B23A2E;
  --ink-text:#14171F;
  --ink-text-dim:#4A4E59;

  --rail-w:240px;
  --header-h:76px;
  --header-h-scrolled:64px;
  --maxw:1280px;
  --pad-x:clamp(18px,3.4vw,48px);
  --gap:clamp(16px,2.4vw,32px);
  --band:clamp(64px,9vw,150px);
  --ease:cubic-bezier(0.22,0.61,0.36,1);

  --font-display:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",Georgia,serif;
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,"Cascadia Mono",Consolas,monospace;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--porcelain);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::after{
  content:"";position:fixed;inset:0;z-index:3;pointer-events:none;opacity:.45;
  background-image:
    repeating-linear-gradient(0deg,rgba(245,242,233,.016) 0 1px,transparent 1px 4px),
    repeating-linear-gradient(90deg,rgba(245,242,233,.012) 0 1px,transparent 1px 6px);
}
h1,h2,h3,h4{margin:0;font-family:var(--font-sans);font-weight:600;line-height:1.35;color:inherit}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
img{max-width:100%;display:block}
a{color:var(--gold);text-decoration:none}
button{font:inherit}
ul,ol{margin:0;padding:0}
figure{margin:0}
hr{border:0}
::selection{background:rgba(201,162,74,.28);color:var(--porcelain)}
:focus-visible{outline:2px solid var(--gold);outline-offset:3px;border-radius:2px}

/* 桌面让出书脊，移动端让出底部刻度条 */
@media (min-width:1080px){body{padding-left:var(--rail-w)}}
@media (max-width:1079.98px){body{padding-bottom:66px;--header-h:64px}}

#main-content{scroll-margin-top:calc(var(--header-h) + 16px);display:block}
.visually-hidden{position:absolute!important;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ---------- 通用容器 ---------- */
.shell{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--pad-x)}

.section{padding-block:var(--band)}
.section--tight{padding-block:clamp(32px,4vw,64px)}
.section--paper{background:var(--porcelain);color:var(--ink-text)}
.section--paper .section-title,.section--paper .display-1,.section--paper .display-2,.section--paper .placard-title{color:var(--ink-text)}
.section--paper .section-lead,.section--paper .lede,.section--paper .placard-text,.section--paper .prose{color:var(--ink-text-dim)}
.section--paper .placard{background:#FFFFFF;border-color:rgba(20,23,31,.14)}
.section--paper .exhibit-tag{color:#8A6B1F;border-color:rgba(138,107,31,.42)}

.section-head{display:flex;flex-direction:column;gap:14px;margin-bottom:clamp(28px,4vw,56px);max-width:70ch}
.section-kicker{margin:0;font-family:var(--font-mono);font-size:13px;letter-spacing:.14em;color:var(--gold);font-variant-numeric:tabular-nums}
.section-title{font-family:var(--font-display);font-weight:900;font-size:clamp(30px,4.4vw,60px);line-height:1.06;letter-spacing:-.01em;color:var(--porcelain)}
.section-lead{margin:0;max-width:60ch;color:var(--porcelain-dim);font-size:17px;line-height:1.75}

.display-1{font-family:var(--font-display);font-weight:900;font-size:clamp(40px,7vw,112px);line-height:1.02;letter-spacing:-.01em;margin:0}
.display-2{font-family:var(--font-display);font-weight:900;font-size:clamp(30px,4.6vw,64px);line-height:1.06;letter-spacing:-.01em;margin:0}
.lede{font-size:clamp(17px,1.4vw,20px);line-height:1.75;color:var(--porcelain-dim);max-width:60ch;margin:0}
.mono-meta{font-family:var(--font-mono);font-size:13px;letter-spacing:.08em;color:rgba(207,202,187,.75);font-variant-numeric:tabular-nums}
.divider{height:1px;background:linear-gradient(90deg,var(--gold),rgba(46,62,107,0));margin:clamp(24px,3vw,44px) 0}
.stack>*+*{margin-top:var(--stack-gap,16px)}

/* ---------- 网格 ---------- */
.grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:var(--gap)}
.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-12{grid-column:span 12}
.col-offset-1{grid-column-start:2}
.col-offset-2{grid-column-start:3}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--gap)}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--gap)}
.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:var(--gap)}

/* ---------- 按钮与链接 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:12px 22px;border:1px solid transparent;border-radius:2px;
  font-family:var(--font-sans);font-size:14px;font-weight:500;letter-spacing:.08em;line-height:1.2;
  text-decoration:none;cursor:pointer;
  transition:background .12s var(--ease),color .12s var(--ease),border-color .12s var(--ease);
}
.btn--gold{background:var(--gold);color:var(--ink-900);border-color:var(--gold)}
.btn--gold:hover{background:var(--gold-soft);border-color:var(--gold-soft)}
.btn--ghost{background:transparent;color:var(--gold);border-color:rgba(201,162,74,.5)}
.btn--ghost:hover{background:rgba(201,162,74,.12);border-color:var(--gold)}
.btn--quiet{background:transparent;color:var(--porcelain-dim);border-color:var(--ink-600)}
.btn--quiet:hover{color:var(--porcelain);border-color:var(--gold)}
.text-link{color:var(--gold);border-bottom:1px solid rgba(201,162,74,.45);transition:color .12s var(--ease),border-color .12s var(--ease)}
.text-link:hover{color:var(--gold-soft);border-bottom-color:var(--gold-soft)}

/* ---------- 分节标题 / 卡片 / 说明牌 ---------- */
.card{position:relative;background:var(--ink-700);border:1px solid rgba(46,62,107,.9);border-radius:2px;padding:clamp(20px,2.4vw,30px)}
.card--glass{background:rgba(19,29,58,.62);backdrop-filter:blur(10px) saturate(120%);border-color:rgba(201,162,74,.28)}

.placard{
  position:relative;display:block;padding:clamp(18px,2.2vw,26px);
  background:var(--ink-700);border:1px solid rgba(46,62,107,.85);border-radius:2px;
  transition:border-color .12s var(--ease),background .12s var(--ease);
}
.placard:hover{border-color:var(--gold)}
.placard-index{display:block;font-family:var(--font-mono);font-size:13px;letter-spacing:.1em;color:var(--gold);font-variant-numeric:tabular-nums}
.placard-title{margin:10px 0 8px;font-size:clamp(19px,2vw,24px);font-weight:600;line-height:1.35;color:var(--porcelain)}
.placard-text{margin:0;max-width:60ch;color:var(--porcelain-dim);font-size:16px;line-height:1.75}
.placard-meta{margin:14px 0 0;font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;color:rgba(207,202,187,.6)}

.exhibit-tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 12px;border:1px solid rgba(201,162,74,.42);border-radius:2px;
  font-size:12px;font-weight:500;letter-spacing:.14em;text-transform:uppercase;
  color:var(--gold);background:transparent;
}
.exhibit-tag--red{color:#E9A79E;border-color:rgba(178,58,46,.7);background:rgba(178,58,46,.12)}

.media-frame{
  position:relative;overflow:hidden;border:1px solid rgba(46,62,107,.9);border-radius:2px;
  aspect-ratio:16/9;
  background:linear-gradient(150deg,rgba(27,39,73,.95) 0%,rgba(11,18,38,.98) 100%);
}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(11,18,38,0) 55%,rgba(11,18,38,.55) 100%);
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}
.media-frame img{width:100%;height:100%;object-fit:cover;filter:saturate(.72) contrast(1.04)}

.prose{max-width:68ch;font-size:17px;line-height:1.75;color:var(--porcelain-dim)}
.prose h2{font-family:var(--font-display);font-weight:900;font-size:clamp(26px,3vw,38px);line-height:1.1;color:var(--porcelain);margin:2.2em 0 .6em}
.prose h3{font-size:20px;font-weight:600;color:var(--porcelain);margin:1.8em 0 .5em}
.prose ul,.prose ol{padding-left:1.25em;margin:0 0 1.2em}
.prose li{margin:0 0 .5em}
.prose a{color:var(--gold);text-decoration:underline;text-underline-offset:3px}

/* ---------- 面包屑 ---------- */
.breadcrumbs{padding-block:clamp(20px,3vw,34px) 0}
.breadcrumbs-list{display:flex;flex-wrap:wrap;align-items:center;list-style:none;margin:0;padding:0;font-family:var(--font-mono);font-size:13px;letter-spacing:.06em}
.breadcrumbs-item{display:inline-flex;align-items:center}
.breadcrumbs-item+.breadcrumbs-item::before{content:"/";margin:0 10px;color:rgba(207,202,187,.4)}
.breadcrumb-link{color:var(--porcelain-dim);transition:color .12s var(--ease)}
.breadcrumb-link:hover{color:var(--gold-soft)}
.breadcrumb-current{color:var(--gold)}

/* ---------- 头部 ---------- */
.site-header{position:static}
.header-bar{
  position:fixed;top:0;right:0;left:0;z-index:120;
  display:flex;align-items:center;height:var(--header-h);
  background:transparent;border-bottom:1px solid transparent;
  transition:height .3s var(--ease),background .3s var(--ease),border-color .3s var(--ease);
}
@media (min-width:1080px){.header-bar{left:var(--rail-w)}}
.site-header[data-scrolled="true"] .header-bar{
  height:var(--header-h-scrolled);
  background:rgba(11,18,38,.92);
  border-bottom-color:rgba(201,162,74,.3);
  backdrop-filter:blur(14px) saturate(120%);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;gap:clamp(12px,2vw,32px);
  width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--pad-x);
}
.scroll-progress{
  position:absolute;left:0;right:0;bottom:-1px;height:2px;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--gold),var(--gold-soft));
  pointer-events:none;
}

.skip-link{
  position:fixed;top:0;left:0;z-index:220;
  padding:12px 20px;background:var(--gold);color:var(--ink-900);
  font-size:14px;font-weight:600;letter-spacing:.08em;
  transform:translateY(-120%);
  transition:transform .18s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

.brand{display:inline-flex;align-items:center;gap:12px;color:var(--porcelain);text-decoration:none;flex:0 0 auto}
.brand-mark{
  position:relative;display:grid;place-items:center;width:36px;height:36px;flex:0 0 auto;
  border:1px solid rgba(201,162,74,.6);border-radius:2px;
  font-family:var(--font-display);font-weight:900;font-size:20px;line-height:1;color:var(--gold);
}
.brand-mark::after{content:"";position:absolute;right:-3px;bottom:-3px;width:6px;height:6px;background:var(--cinnabar)}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-name{font-family:var(--font-display);font-weight:900;font-size:19px;letter-spacing:.01em;white-space:nowrap}
.brand-latin{margin-left:8px;font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;color:var(--gold)}
.brand-tagline{margin-top:3px;font-size:11px;letter-spacing:.14em;color:rgba(207,202,187,.66);white-space:nowrap}

.primary-nav{display:flex;align-items:center}
.nav-list{display:flex;align-items:center;gap:clamp(12px,1.8vw,28px);list-style:none}
.nav-link{
  position:relative;display:inline-block;padding:8px 2px;
  font-size:13px;font-weight:500;letter-spacing:.14em;color:var(--porcelain-dim);
  white-space:nowrap;transition:color .12s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:2px;height:1px;
  background:var(--gold);transform:scaleX(0);transform-origin:left;
  transition:transform .12s var(--ease),background .12s var(--ease);
}
.nav-link:hover,.nav-link:focus-visible{color:var(--gold-soft)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--gold)}
.nav-link[aria-current="page"]::after{transform:scaleX(1);background:var(--cinnabar)}

.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.header-cta{padding:10px 18px;font-size:13px}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:44px;height:44px;padding:0;
  background:transparent;border:1px solid rgba(201,162,74,.45);border-radius:2px;
  color:var(--gold);cursor:pointer;
  transition:background .12s var(--ease),border-color .12s var(--ease);
}
.nav-toggle:hover{background:rgba(201,162,74,.14);border-color:var(--gold)}
.nav-toggle-bars{display:flex;flex-direction:column;gap:4px;width:18px}
.nav-toggle-bar{display:block;height:1.5px;border-radius:1px;background:currentColor;transition:transform .2s var(--ease),opacity .2s var(--ease)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1){transform:translateY(5.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3){transform:translateY(-5.5px) rotate(-45deg)}

/* ---------- 年份轴书脊 ---------- */
.year-rail{
  position:fixed;top:0;bottom:0;left:0;width:var(--rail-w);z-index:110;
  display:flex;flex-direction:column;gap:24px;
  padding:calc(var(--header-h) + 26px) 20px 26px;
  background:linear-gradient(180deg,rgba(19,29,58,.94) 0%,rgba(11,18,38,.99) 100%);
  border-right:1px solid rgba(46,62,107,.9);
  backdrop-filter:blur(12px);overflow-y:auto;
}
.rail-label{
  display:flex;align-items:center;gap:8px;margin:0;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;
  color:rgba(207,202,187,.62);white-space:nowrap;
}
.rail-label::before{content:"";flex:0 0 auto;width:16px;height:1px;background:var(--gold)}
.rail-track{list-style:none;display:flex;flex-direction:column}
.rail-item{display:block}
.rail-node{display:flex;align-items:center;gap:10px;padding:7px 0;color:var(--porcelain-dim)}
.rail-tick{flex:0 0 auto;width:18px;height:1px;background:var(--ink-600);transition:width .2s var(--ease),background .2s var(--ease)}
.rail-year{font-family:var(--font-mono);font-size:14px;font-variant-numeric:tabular-nums;letter-spacing:.06em;transition:color .2s var(--ease)}
.rail-note{margin-left:auto;font-size:10px;letter-spacing:.14em;color:rgba(207,202,187,.5)}
.rail-node.is-active .rail-tick{width:30px;background:var(--gold)}
.rail-node.is-active .rail-year{color:var(--gold-soft)}
.rail-node.is-active .rail-note{color:var(--cinnabar)}

.rail-fav{margin-top:auto;display:flex;flex-direction:column;gap:10px;padding-top:20px;border-top:1px solid rgba(46,62,107,.8)}
.rail-fav-title{margin:0;font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;color:rgba(207,202,187,.62)}
.rail-fav-list{list-style:none;display:flex;flex-direction:column;gap:2px}
.rail-fav-link{
  display:block;padding:7px 0 7px 12px;
  font-size:14px;color:var(--porcelain-dim);
  border-left:1px solid rgba(46,62,107,.9);
  transition:color .12s var(--ease),border-color .12s var(--ease),padding-left .12s var(--ease);
}
.rail-fav-link:hover{color:var(--gold-soft);border-left-color:var(--gold);padding-left:16px}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;margin-top:clamp(72px,10vw,160px);
  background:linear-gradient(180deg,var(--ink-800) 0%,var(--ink-900) 100%);
  border-top:1px solid rgba(201,162,74,.28);
  color:var(--porcelain);
}
.footer-inner{
  display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1.6fr);
  gap:clamp(28px,5vw,72px);
  padding-block:clamp(48px,7vw,92px) clamp(28px,4vw,48px);
}
.footer-brand{max-width:52ch}
.footer-lockup{
  display:flex;align-items:center;gap:12px;margin:0;
  font-family:var(--font-display);font-weight:900;font-size:clamp(20px,2.2vw,26px);line-height:1.25;
}
.footer-seal{
  display:grid;place-items:center;width:30px;height:30px;flex:0 0 auto;
  border:1px solid rgba(201,162,74,.6);border-radius:2px;
  font-size:16px;color:var(--gold);
}
.footer-tagline{margin:12px 0 0;font-size:13px;letter-spacing:.14em;color:var(--gold)}
.footer-note{margin:16px 0 0;font-size:15px;line-height:1.75;color:var(--porcelain-dim)}
.footer-cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(18px,3vw,40px)}
.footer-col-title{
  margin:0 0 14px;font-family:var(--font-mono);font-size:12px;
  letter-spacing:.18em;text-transform:uppercase;color:rgba(207,202,187,.6);
}
.footer-list{list-style:none;display:flex;flex-direction:column;gap:8px}
.footer-link{
  font-size:15px;color:var(--porcelain-dim);
  border-bottom:1px solid transparent;
  transition:color .12s var(--ease),border-color .12s var(--ease);
}
.footer-link:hover{color:var(--gold-soft);border-bottom-color:var(--gold)}

.footer-archive-row{padding-block:0}
.footer-archive{
  display:grid;grid-template-columns:1fr auto;align-items:center;
  gap:6px 24px;padding:clamp(20px,2.6vw,30px) clamp(20px,3vw,34px);
  border:1px solid rgba(201,162,74,.4);border-radius:2px;
  background:linear-gradient(120deg,rgba(27,39,73,.9) 0%,rgba(19,29,58,.6) 100%);
  color:var(--porcelain);
  transition:border-color .12s var(--ease),background .12s var(--ease);
}
.footer-archive:hover{border-color:var(--gold);background:linear-gradient(120deg,rgba(34,48,88,.95) 0%,rgba(19,29,58,.72) 100%)}
.footer-archive-label{font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;color:var(--gold)}
.footer-archive-title{font-family:var(--font-display);font-weight:900;font-size:clamp(20px,2.6vw,30px);line-height:1.15;letter-spacing:-.01em}
.footer-archive-arrow{grid-column:2;grid-row:1 / span 2;font-size:26px;color:var(--gold);transition:transform .12s var(--ease)}
.footer-archive:hover .footer-archive-arrow{transform:translateX(6px)}

.footer-meta{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:10px 28px;padding-block:22px 46px;
  border-top:1px solid rgba(46,62,107,.7);
}
.footer-meta p{margin:0;font-size:13px;line-height:1.7;color:rgba(207,202,187,.72)}
.footer-contact{flex:1 1 340px}
.footer-address{flex:1 1 220px}
.footer-legal{flex:0 1 auto;font-family:var(--font-mono);letter-spacing:.06em}
.to-top{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 16px;background:transparent;border:1px solid var(--ink-600);border-radius:2px;
  font-size:13px;letter-spacing:.1em;color:var(--porcelain-dim);cursor:pointer;
  transition:color .12s var(--ease),border-color .12s var(--ease);
}
.to-top:hover,.to-top.is-visible{color:var(--gold-soft);border-color:var(--gold)}

/* ---------- 滚动显现 ---------- */
[data-reveal]{
  opacity:0;transform:translateY(10px);
  transition:opacity .42s var(--ease),transform .42s var(--ease);
}
[data-reveal].is-revealed{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1079.98px){
  .nav-toggle{display:inline-flex}
  .primary-nav{
    position:fixed;top:var(--header-h);left:0;right:0;
    display:block;max-height:calc(100vh - var(--header-h) - 66px);overflow-y:auto;
    padding:14px var(--pad-x) 30px;
    background:rgba(11,18,38,.97);
    border-bottom:1px solid rgba(201,162,74,.3);
    backdrop-filter:blur(18px) saturate(120%);
    opacity:0;visibility:hidden;transform:translateY(-8px);
    transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s var(--ease);
  }
  .primary-nav[data-open]{opacity:1;visibility:visible;transform:none}
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-link{display:block;padding:15px 0;font-size:16px;letter-spacing:.08em;border-bottom:1px solid rgba(46,62,107,.6)}
  .nav-link::after{display:none}
  .nav-link[aria-current="page"]{box-shadow:inset 2px 0 0 var(--cinnabar);padding-left:14px}

  .year-rail{
    top:auto;bottom:0;left:0;right:0;width:auto;height:66px;
    flex-direction:row;align-items:center;gap:18px;
    padding:0 16px;border-right:0;border-top:1px solid rgba(201,162,74,.34);
    background:rgba(11,18,38,.97);overflow-x:auto;overflow-y:hidden;
  }
  .rail-label{flex:0 0 auto}
  .rail-track{flex-direction:row;gap:16px;flex:0 0 auto}
  .rail-node{flex-direction:column;align-items:flex-start;gap:3px;padding:0}
  .rail-tick{width:26px}
  .rail-note{display:none}
  .rail-fav{margin:0;padding:0 0 0 18px;border-top:0;border-left:1px solid rgba(46,62,107,.8);flex-direction:row;align-items:center;gap:14px;flex:0 0 auto}
  .rail-fav-title{display:none}
  .rail-fav-list{flex-direction:row;gap:16px}
  .rail-fav-link{border-left:0;padding:6px 0;font-size:13px;white-space:nowrap}
  .rail-fav-link:hover{padding-left:0}
}

@media (max-width:900px){
  .brand-tagline{display:none}
  .footer-inner{grid-template-columns:minmax(0,1fr)}
  .col-3,.col-4,.col-5{grid-column:span 6}
  .col-7,.col-8,.col-9{grid-column:span 12}
  .col-offset-1,.col-offset-2{grid-column-start:auto}
  .grid-3,.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:640px){
  body{font-size:16px}
  .header-cta{display:none}
  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
  .footer-meta{flex-direction:column;align-items:flex-start}
  .to-top{width:100%;justify-content:center}
  .footer-archive{grid-template-columns:1fr}
  .footer-archive-arrow{grid-column:1;grid-row:auto;justify-self:start}
  .col-3,.col-4,.col-5,.col-6{grid-column:span 12}
  .grid-2,.grid-3,.grid-4{grid-template-columns:minmax(0,1fr)}
}

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