/* ===== 千嬴国际 · 共享样式 /assets/site.css ===== */

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;text-align:left}
img,svg,video{display:block;max-width:100%}
table{border-collapse:collapse;width:100%}

:root{
  --ink:#0B1B2B;
  --ink-2:#14283C;
  --paper:#F2EADB;
  --ivory:#FBF7EF;
  --gold:#C9A227;
  --gold-soft:#E6CE93;
  --celadon:#4F8A7B;
  --cinnabar:#B23A2F;
  --slate:#8AA0B4;
  --black:#0E1419;

  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"IBM Plex Mono","SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
  --font-serif:"Source Serif 4","Source Serif Pro",Georgia,"Times New Roman",serif;

  --s1:8px; --s2:16px; --s3:24px; --s4:32px; --s5:48px; --s6:64px; --s7:88px;
  --header-h:104px;
  --line-gold:rgba(230,206,147,.24);
  --line-gold-strong:rgba(230,206,147,.55);
  --shell-pad:clamp(16px,4vw,40px);
  --maxw:1320px;
}

body{
  min-height:100vh;
  display:flex;
  flex-direction:column;
  font-family:var(--font-sans);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  color:var(--paper);
  background-color:var(--ink);
  background-image:
    radial-gradient(circle at 16% -12%,rgba(201,162,39,.12),transparent 52%),
    radial-gradient(circle at 92% 4%,rgba(79,138,123,.10),transparent 46%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

::selection{background:rgba(201,162,39,.32);color:#fff}

:focus-visible{outline:2px solid var(--gold-soft);outline-offset:3px}

h1,h2,h3,h4{font-weight:800;letter-spacing:.06em;line-height:1.25}
p{max-width:72ch}

.mono,.num,[data-mono]{font-family:var(--font-mono);font-weight:500;letter-spacing:.04em}
.serif{font-family:var(--font-serif);font-weight:400;letter-spacing:.02em}
.eyebrow{
  display:inline-block;font-size:12px;font-weight:700;letter-spacing:.14em;
  color:var(--gold);text-transform:uppercase;
}
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:2px 10px;
  border:1px solid rgba(201,162,39,.5);border-radius:2px;
  font-size:12px;letter-spacing:.1em;line-height:1.7;color:var(--gold-soft);
}
.tag--celadon{border-color:rgba(79,138,123,.75);color:#9FD0C1}
.tag--cinnabar{border-color:rgba(178,58,47,.75);color:#E6A198}

.rule-gold{
  height:1px;border:0;margin:0;
  background:linear-gradient(90deg,var(--line-gold-strong),rgba(230,206,147,.04));
}

.container{
  width:100%;max-width:var(--maxw);margin-inline:auto;
  padding-inline:var(--shell-pad);
}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:12px 22px;border:1px solid transparent;border-radius:0;
  font-size:14px;font-weight:700;letter-spacing:.12em;line-height:1.4;
  transition:background-color .18s ease,border-color .18s ease,color .18s ease;
}
.btn--gold{background:var(--gold);border-color:var(--gold);color:var(--ink)}
.btn--gold:hover{background:var(--gold-soft);border-color:var(--gold-soft)}
.btn--line{background:rgba(201,162,39,.06);border-color:rgba(230,206,147,.5);color:var(--gold-soft)}
.btn--line:hover{background:rgba(201,162,39,.18);border-color:var(--gold);color:#fff}
.btn--ghost{background:transparent;border-color:rgba(138,160,180,.42);color:var(--paper)}
.btn--ghost:hover{border-color:var(--gold-soft);color:var(--gold-soft)}

/* ===== 浅色长阅读区 ===== */
.on-paper{background:var(--paper);color:var(--black)}
.on-paper h1,.on-paper h2,.on-paper h3,.on-paper h4{color:var(--black)}
.on-paper .section-note,.on-paper .figure-caption{color:#51616E}
.on-paper .eyebrow{color:#8A6E12}
.on-paper .tag{border-color:rgba(14,20,25,.28);color:#1B2A36}
.on-paper .tag--celadon{border-color:rgba(79,138,123,.8);color:#2F6A5C}
.on-paper .tag--cinnabar{border-color:rgba(178,58,47,.8);color:#9B2E25}
.on-paper .btn--line{border-color:rgba(14,20,25,.3);color:var(--black);background:transparent}
.on-paper .btn--line:hover{border-color:var(--gold);background:rgba(201,162,39,.14)}
.on-paper .rule-gold{background:linear-gradient(90deg,rgba(14,20,25,.35),rgba(14,20,25,.04))}
.on-paper .section-num{color:#8A6E12}

/* ===== 网格 ===== */
.grid-12{
  display:grid;grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(16px,2vw,28px);
}
.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}
@media (max-width:900px){
  .col-9,.col-8{grid-column:span 12}
  .col-7,.col-6,.col-5,.col-4{grid-column:span 6}
}
@media (max-width:640px){
  .col-9,.col-8,.col-7,.col-6,.col-5,.col-4{grid-column:1/-1}
}

/* ===== 区块头 ===== */
.section-head{
  display:grid;grid-template-columns:1fr;gap:10px;
  margin-bottom:clamp(20px,3vw,36px);
}
.section-num{
  font-family:var(--font-mono);font-size:13px;font-weight:500;
  letter-spacing:.14em;color:var(--gold);
}
.section-title{font-size:clamp(24px,3.2vw,40px);letter-spacing:.06em}
.section-note{font-size:14px;line-height:1.85;color:var(--slate);max-width:34ch}
@media (min-width:900px){
  .section-head{
    grid-template-columns:auto minmax(0,7fr) minmax(0,3fr);
    gap:var(--s4);align-items:start;
  }
}

/* ===== 面包屑 ===== */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding-block:18px;font-size:12px;letter-spacing:.1em;color:var(--slate);
}
.breadcrumb a{color:var(--slate);transition:color .18s ease}
.breadcrumb a:hover{color:var(--gold-soft)}
.breadcrumb .sep{color:rgba(138,160,180,.5)}
.breadcrumb [aria-current="page"]{color:var(--paper)}

/* ===== 竖向编号索引 ===== */
.page-rail{display:none}
@media (min-width:1024px){
  .page-rail{
    display:block;align-self:start;
    position:sticky;top:calc(var(--header-h) + 24px);
  }
}
.rail-link{
  display:flex;align-items:baseline;gap:12px;padding:11px 0;
  font-size:13px;letter-spacing:.1em;color:var(--slate);
  border-bottom:1px solid rgba(230,206,147,.12);
  transition:color .18s ease;
}
.rail-link .num{font-size:11px;color:rgba(138,160,180,.85)}
.rail-link:hover{color:var(--paper)}
.rail-link[aria-current="true"]{color:var(--gold)}
.rail-link[aria-current="true"] .num{color:var(--gold)}

/* ===== 图片容器基础 ===== */
.figure{display:grid;gap:10px;margin:0}
.figure-frame{
  position:relative;overflow:hidden;isolation:isolate;
  border:1px solid rgba(230,206,147,.24);
  background:linear-gradient(142deg,rgba(20,40,60,.96),rgba(11,27,43,.99));
  aspect-ratio:16/10;
}
.figure-frame::after{
  content:"";position:absolute;inset:0;z-index:2;pointer-events:none;
  background-image:
    linear-gradient(rgba(230,206,147,.075) 1px,transparent 1px),
    linear-gradient(90deg,rgba(230,206,147,.075) 1px,transparent 1px);
  background-size:48px 48px;
}
.figure-frame img{
  position:relative;z-index:1;
  width:100%;height:100%;object-fit:cover;
}
.figure-frame--wide{aspect-ratio:21/9}
.figure-frame--tall{aspect-ratio:3/4}
.figure-frame--square{aspect-ratio:1/1}
.figure-caption{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;
  color:var(--slate);text-transform:uppercase;
}
.on-paper .figure-frame{
  border-color:rgba(14,20,25,.2);
  background:linear-gradient(142deg,#E8DFCC,#F5EEE0);
}
.on-paper .figure-frame::after{
  background-image:
    linear-gradient(rgba(14,20,25,.06) 1px,transparent 1px),
    linear-gradient(90deg,rgba(14,20,25,.06) 1px,transparent 1px);
}

/* ===== 分段切换 ===== */
.tabs{display:grid;gap:0;margin-block:clamp(20px,3vw,32px)}
.tab-list{
  display:flex;flex-wrap:wrap;
  border-bottom:1px solid rgba(230,206,147,.26);
}
.tab{
  padding:12px 20px;margin-bottom:-1px;
  font-size:13px;font-weight:700;letter-spacing:.12em;color:var(--slate);
  border:1px solid transparent;border-bottom:2px solid transparent;
  transition:color .18s ease,background-color .18s ease,border-color .18s ease;
}
.tab:hover{color:var(--paper)}
.tab[aria-selected="true"]{
  color:var(--gold-soft);border-bottom-color:var(--gold);
  background:rgba(201,162,39,.09);
}
.tab-panel{padding-block:var(--s3)}
.tab-panel[hidden]{display:none}
.on-paper .tab-list{border-bottom-color:rgba(14,20,25,.18)}
.on-paper .tab{color:#5B6B78}
.on-paper .tab:hover{color:var(--black)}
.on-paper .tab[aria-selected="true"]{color:#8A6E12;background:rgba(201,162,39,.16)}

/* ===== 编号手风琴 ===== */
.accordion{
  border:1px solid rgba(230,206,147,.22);
  background:rgba(20,40,60,.62);
}
.accordion + .accordion{margin-top:-1px}
.accordion summary{
  display:flex;align-items:baseline;gap:14px;
  padding:16px 20px;cursor:pointer;list-style:none;
  font-weight:700;letter-spacing:.04em;color:var(--paper);
  transition:color .18s ease,background-color .18s ease;
}
.accordion summary::-webkit-details-marker{display:none}
.accordion summary::after{
  content:"+";margin-left:auto;
  font-family:var(--font-mono);font-size:16px;color:var(--gold);
}
.accordion summary:hover{background:rgba(201,162,39,.08)}
.accordion[open] summary{
  color:var(--gold-soft);
  border-bottom:1px solid rgba(230,206,147,.2);
}
.accordion[open] summary::after{content:"–"}
.accordion-body{padding:16px 20px;font-size:15px;line-height:1.85;color:rgba(242,234,219,.9)}
.on-paper .accordion{background:var(--ivory);border-color:rgba(14,20,25,.14)}
.on-paper .accordion summary{color:var(--black)}
.on-paper .accordion summary:hover{background:rgba(201,162,39,.1)}
.on-paper .accordion[open] summary{color:#8A6E12;border-bottom-color:rgba(14,20,25,.12)}
.on-paper .accordion-body{color:#2A3742}

/* ===== 显现动效 ===== */
.has-js [data-reveal]{opacity:0;transform:translateY(12px)}
.has-js [data-reveal].is-visible{
  opacity:1;transform:none;
  transition:opacity .36s ease,transform .36s ease;
}

/* ===== 头部 ===== */
.site-header{
  position:sticky;top:0;z-index:90;
  background:rgba(11,27,43,.74);
  -webkit-backdrop-filter:blur(14px) saturate(125%);
  backdrop-filter:blur(14px) saturate(125%);
  border-bottom:1px solid var(--line-gold);
  color:var(--paper);
  transition:background-color .3s ease,box-shadow .3s ease;
}
.site-header.is-condensed{
  background:rgba(11,27,43,.97);
  box-shadow:0 1px 0 rgba(201,162,39,.45),0 22px 44px -34px #000;
}
.scroll-progress{
  position:absolute;left:0;bottom:-1px;z-index:3;
  width:100%;height:2px;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--gold),var(--gold-soft) 70%,rgba(230,206,147,.15));
  transition:transform .12s linear;
  pointer-events:none;
}
.skip-link{
  position:absolute;left:16px;top:-72px;z-index:120;
  padding:10px 18px;background:var(--gold);color:var(--ink);
  font-size:13px;font-weight:700;letter-spacing:.12em;
  transition:top .2s ease;
}
.skip-link:focus{top:8px}

.header-shell{
  position:relative;
  width:100%;max-width:var(--maxw);margin-inline:auto;
  padding-inline:var(--shell-pad);
}
.header-bar{
  display:flex;align-items:center;
  gap:clamp(12px,2vw,28px);
  min-height:64px;
  transition:min-height .28s ease;
}
.site-header.is-condensed .header-bar{min-height:52px}

.brand{
  display:flex;align-items:center;gap:12px;
  padding-right:clamp(12px,2vw,24px);
  border-right:1px solid rgba(230,206,147,.18);
}
.brand-mark{
  display:grid;place-items:center;
  width:36px;height:36px;flex:0 0 36px;
  border:1px solid rgba(201,162,39,.7);
  background:rgba(201,162,39,.1);
  color:var(--gold);font-size:17px;font-weight:800;letter-spacing:0;
  transition:background-color .2s ease,color .2s ease;
}
.brand:hover .brand-mark{background:var(--gold);color:var(--ink)}
.brand-text{display:grid;gap:2px}
.brand-name{font-size:17px;font-weight:800;letter-spacing:.16em;line-height:1.2}
.brand-sub{
  font-family:var(--font-mono);font-size:9px;font-weight:500;
  letter-spacing:.18em;line-height:1.4;color:var(--slate);
}

.header-cta{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 16px;border:1px solid rgba(201,162,39,.55);
  background:linear-gradient(180deg,rgba(201,162,39,.14),rgba(201,162,39,.03));
  color:var(--gold-soft);font-size:13px;font-weight:700;letter-spacing:.14em;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease;
}
.header-cta:hover{background:rgba(201,162,39,.22);border-color:var(--gold);color:#fff}

.header-utility{margin-left:auto;display:flex;align-items:center;gap:clamp(14px,2vw,26px)}
.utility-link{
  position:relative;padding-bottom:4px;
  font-size:13px;font-weight:500;letter-spacing:.12em;color:var(--slate);
  transition:color .18s ease;
}
.utility-link::after{
  content:"";position:absolute;left:0;bottom:0;width:100%;height:1px;
  background:var(--gold);transform:scaleX(0);transform-origin:0 50%;
  transition:transform .18s ease;
}
.utility-link:hover,.utility-link:focus-visible{color:var(--gold-soft)}
.utility-link:hover::after,.utility-link:focus-visible::after{transform:scaleX(1)}

.nav-toggle{
  display:none;align-items:center;gap:10px;
  padding:10px 12px;border:1px solid rgba(230,206,147,.4);border-radius:2px;
  color:var(--gold-soft);
  font-family:var(--font-mono);font-size:11px;font-weight:500;letter-spacing:.16em;
}
.nav-toggle:hover{border-color:var(--gold);background:rgba(201,162,39,.12)}
.nav-toggle-bars{display:grid;gap:4px;width:16px}
.nav-toggle-bars span{
  display:block;height:1px;background:currentColor;
  transition:transform .2s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:first-child{transform:translateY(2.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:last-child{transform:translateY(-2.5px) rotate(-45deg)}

.primary-nav{border-top:1px solid rgba(230,206,147,.14)}
.nav-list{position:relative;display:flex;flex-wrap:wrap}
.nav-link{
  position:relative;display:flex;align-items:baseline;gap:9px;
  padding:11px clamp(14px,2vw,24px);
  font-size:14px;font-weight:500;letter-spacing:.12em;color:var(--paper);
  border-right:1px solid rgba(230,206,147,.12);
  transition:color .18s ease,background-color .18s ease;
}
.nav-link:first-child{padding-left:0}
.nav-num{
  font-family:var(--font-mono);font-size:10px;font-weight:500;
  letter-spacing:.1em;color:rgba(138,160,180,.85);
  transition:color .18s ease;
}
.nav-link::before{
  content:"";position:absolute;left:0;right:0;top:-1px;height:2px;
  background:var(--gold);transform:scaleX(0);transform-origin:0 50%;
  transition:transform .18s ease;
}
.nav-link:hover{color:var(--gold-soft);background:rgba(201,162,39,.07)}
.nav-link:hover::before,.nav-link:focus-visible::before{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--gold-soft);background:rgba(201,162,39,.1)}
.nav-link[aria-current="page"]::before{transform:scaleX(1)}
.nav-link[aria-current="page"] .nav-num{color:var(--gold)}

@media (min-width:900px){
  .nav-list::before{
    content:"";position:absolute;left:0;top:-1px;width:32px;height:2px;
    background:var(--gold);
  }
}
@media (max-width:899px){
  :root{--header-h:60px}
  .header-bar{min-height:60px}
  .site-header.is-condensed .header-bar{min-height:60px}
  .brand{border-right:0;padding-right:0}
  .brand-sub{display:none}
  .header-utility{display:none}
  .header-cta{margin-left:auto}
  .nav-toggle{display:inline-flex}
  .primary-nav{
    display:none;
    position:absolute;left:0;right:0;top:100%;
    background:var(--ink-2);
    border-top:1px solid var(--line-gold-strong);
    border-bottom:1px solid var(--line-gold-strong);
    box-shadow:0 28px 48px -28px #000;
    max-height:calc(100vh - 60px);
    overflow-y:auto;
    border-left:1px solid var(--line-gold-strong);
    border-right:1px solid var(--line-gold-strong);
  }
  .primary-nav[data-open]{display:block;animation:navDrop .22s ease both}
  @keyframes navDrop{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}
  .nav-list{flex-direction:column}
  .nav-link{
    width:100%;padding:15px var(--shell-pad);
    border-right:0;border-bottom:1px solid rgba(230,206,147,.1);
    font-size:15px;
  }
  .nav-link:first-child{padding-left:var(--shell-pad)}
  .nav-link::before{top:0;bottom:auto;height:100%;width:2px;right:auto;transform:scaleY(0);transform-origin:50% 0}
  .nav-link:hover::before,.nav-link:focus-visible::before{transform:scaleY(1)}
  .nav-link[aria-current="page"]::before{transform:scaleY(1)}
}

@media (max-width:520px){
  .brand-name{font-size:15px;letter-spacing:.12em}
  .brand-mark{width:32px;height:32px;flex-basis:32px;font-size:15px}
  .header-cta{padding:7px 12px;font-size:12px;letter-spacing:.1em}
  .nav-toggle-label{display:none}
}

/* ===== 页脚 ===== */
.site-footer{
  position:relative;margin-top:auto;
  padding-top:clamp(48px,7vw,88px);
  border-top:1px solid rgba(230,206,147,.38);
  background:
    linear-gradient(180deg,rgba(20,40,60,0),rgba(20,40,60,.9) 46%),
    var(--ink);
  color:var(--paper);
  overflow:hidden;
}
.site-footer::before{
  content:"";position:absolute;inset:0;z-index:0;pointer-events:none;
  background-image:radial-gradient(rgba(230,206,147,.16) 1px,transparent 1px);
  background-size:22px 22px;
  opacity:.28;
}
.footer-shell{position:relative;z-index:1}
.footer-grid{
  display:grid;gap:clamp(28px,4vw,48px);
  grid-template-columns:1fr;
  padding-bottom:clamp(36px,5vw,64px);
}
@media (min-width:720px){
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1/-1}
}
@media (min-width:1024px){
  .footer-grid{grid-template-columns:1.5fr .8fr .9fr 1.4fr}
  .footer-brand{grid-column:auto}
}

.footer-brand{display:grid;gap:12px;align-content:start;max-width:38ch}
.footer-mark{
  display:grid;place-items:center;width:44px;height:44px;
  border:1px solid rgba(201,162,39,.7);
  background:rgba(201,162,39,.1);
  color:var(--gold);font-size:20px;font-weight:800;letter-spacing:0;
}
.footer-brand-name{font-size:20px;font-weight:800;letter-spacing:.18em;line-height:1.3}
.footer-tagline{font-size:14px;line-height:1.85;color:rgba(242,234,219,.82);max-width:32ch}
.footer-region{
  font-family:var(--font-mono);font-size:11px;font-weight:500;
  letter-spacing:.16em;color:var(--slate);
}

.footer-col{display:grid;gap:14px;align-content:start}
.footer-col-title{
  position:relative;
  font-size:12px;font-weight:700;letter-spacing:.14em;
  color:var(--slate);padding-top:14px;
}
.footer-col-title::before{
  content:"";position:absolute;left:0;top:0;width:26px;height:2px;
  background:var(--gold);
}
.footer-list{display:grid;gap:9px}
.footer-link{
  position:relative;display:inline-block;
  font-size:14px;line-height:1.7;color:rgba(242,234,219,.86);
  transition:color .18s ease;
}
.footer-link::after{
  content:"";position:absolute;left:0;bottom:0;width:100%;height:1px;
  background:var(--gold);transform:scaleX(0);transform-origin:0 50%;
  transition:transform .18s ease;
}
.footer-link:hover,.footer-link:focus-visible{color:var(--gold-soft)}
.footer-link:hover::after,.footer-link:focus-visible::after{transform:scaleX(1)}

.footer-contact-line{
  display:flex;flex-wrap:wrap;gap:4px 12px;align-items:baseline;
  font-size:13px;line-height:1.75;max-width:44ch;
}
.footer-label{
  flex:0 0 40px;
  font-family:var(--font-mono);font-size:11px;font-weight:500;
  letter-spacing:.14em;color:var(--slate);
}
.footer-value{color:rgba(242,234,219,.92);word-break:break-word}
.footer-action{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-left:52px}

.copy-btn{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border:1px solid rgba(230,206,147,.35);border-radius:2px;
  font-family:var(--font-mono);font-size:11px;font-weight:500;letter-spacing:.1em;
  color:var(--gold-soft);
  transition:border-color .18s ease,background-color .18s ease,color .18s ease;
}
.copy-btn:hover{border-color:var(--gold);background:rgba(201,162,39,.14)}
.copy-btn.is-done{border-color:rgba(79,138,123,.85);color:#9FD0C1}
.copy-feedback{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;
  color:#9FD0C1;min-height:1em;
}
.footer-cta{margin-top:6px;justify-self:start}

.footer-bottom{
  position:relative;z-index:1;
  border-top:1px solid rgba(230,206,147,.2);
  background:rgba(11,27,43,.6);
}
.footer-bottom-inner{
  display:flex;flex-wrap:wrap;gap:8px 24px;
  justify-content:space-between;align-items:center;
  padding-block:18px;
  font-family:var(--font-mono);font-size:11px;font-weight:500;
  letter-spacing:.1em;color:var(--slate);
}
.footer-legal{max-width:none}
.footer-note{max-width:none;color:rgba(138,160,180,.9)}

@media (max-width:520px){
  .footer-action{margin-left:0}
  .footer-bottom-inner{font-size:10px;letter-spacing:.06em}
}

/* ===== 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;
    scroll-behavior:auto !important;
  }
  .has-js [data-reveal]{opacity:1;transform:none}
}