/* ============================================================
   JBO赛场 · 共享外壳 site.css
   夜间赛场指挥中心 / 深墨绿 + 荧光青 + 暖橙 / 切角与斜线
   ============================================================ */

/* ---------- 1. reset ---------- */
*,
*::before,
*::after{box-sizing:border-box;}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}

body,h1,h2,h3,h4,h5,p,figure,blockquote,ul,ol,dl,dd{margin:0;}
ul,ol{padding:0;list-style:none;}
img,svg,video{display:block;max-width:100%;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
a{color:inherit;text-decoration:none;}
table{border-collapse:collapse;width:100%;}

:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:2px;
}

/* ---------- 2. 设计令牌 ---------- */
:root{
  --ink:#0B3B2E;
  --night:#061F19;
  --pitch:#04110D;
  --cyan:#00E5C3;
  --cyan-soft:#6FFFE9;
  --orange:#FF6B35;
  --amber:#FFB03A;
  --paper:#F4E9D8;
  --mist:#B8C7C1;
  --line:#1E5A49;
  --line-soft:rgba(30,90,73,.55);

  --font-head:"Barlow Condensed","DIN Condensed","Noto Sans SC",sans-serif;
  --font-num:"JetBrains Mono","IBM Plex Mono","Roboto Mono",monospace;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC",sans-serif;

  --rail:56px;
  --shell:1360px;
  --pad:clamp(16px,3vw,40px);
  --header-h:66px;
  --cut-shape:polygon(0 0,calc(100% - 16px) 0,100% 16px,100% 100%,16px 100%,0 calc(100% - 16px));
}

/* ---------- 3. 基础排版 ---------- */
body{
  min-height:100vh;
  background-color:var(--ink);
  background-image:
    radial-gradient(circle at 84% 4%,rgba(0,229,195,.14),transparent 40%),
    radial-gradient(circle at 6% 74%,rgba(255,107,53,.09),transparent 44%),
    linear-gradient(180deg,rgba(6,31,25,.9) 0%,rgba(11,59,46,0) 42%);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:17px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}

::selection{background:var(--cyan);color:var(--pitch);}

h1,h2,h3,h4{
  font-family:var(--font-head);
  font-weight:800;
  line-height:1.08;
  letter-spacing:.01em;
  color:var(--paper);
}
h1{font-size:clamp(2.2rem,5vw,4.6rem);}
h2{font-size:clamp(1.7rem,3.4vw,3rem);}
h3{font-size:clamp(1.15rem,2vw,1.6rem);line-height:1.22;}
h4{font-size:clamp(1rem,1.5vw,1.2rem);line-height:1.3;}

strong{color:var(--paper);font-weight:700;}

/* ---------- 4. skip link ---------- */
.skip-link{
  position:fixed;
  top:10px;
  left:10px;
  z-index:200;
  padding:10px 18px;
  background:var(--cyan);
  color:var(--pitch);
  font-size:13px;
  font-weight:700;
  letter-spacing:.1em;
  clip-path:var(--cut-shape);
  transform:translateY(-180%);
  transition:transform .18s ease;
}
.skip-link:focus{transform:none;}

/* ---------- 5. 页头：框架式导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
}

.frame-top{
  position:relative;
  display:flex;
  align-items:center;
  gap:clamp(10px,2vw,28px);
  min-height:var(--header-h);
  padding:0 var(--pad);
  background:rgba(4,17,13,.94);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
}

.frame-top::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:1px;
  background:linear-gradient(90deg,var(--cyan) 0%,rgba(0,229,195,0) 38%,rgba(255,107,53,.7) 100%);
  opacity:.75;
  pointer-events:none;
}

/* 品牌 */
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}
.brand__mark{
  display:grid;
  grid-template-columns:repeat(3,4px);
  align-items:end;
  gap:3px;
  height:26px;
}
.brand__mark i{display:block;background:var(--cyan);height:8px;}
.brand__mark i:nth-child(2){height:16px;background:var(--cyan-soft);}
.brand__mark i:nth-child(3){height:24px;background:var(--orange);}
.brand__text{display:flex;flex-direction:column;line-height:1.15;}
.brand__name{
  font-family:var(--font-head);
  font-size:20px;
  font-weight:800;
  letter-spacing:.05em;
  color:var(--paper);
}
.brand__tag{
  font-size:10px;
  letter-spacing:.16em;
  color:var(--mist);
  text-transform:uppercase;
}

/* 主导航 */
.site-nav{margin-inline-start:auto;}
.site-nav__list{
  display:flex;
  align-items:center;
  gap:clamp(4px,1.3vw,20px);
}
.site-nav__item{flex:0 0 auto;}
.site-nav__link{
  position:relative;
  display:block;
  padding:10px 4px;
  font-size:14px;
  font-weight:600;
  letter-spacing:.08em;
  color:var(--mist);
  transition:color .18s ease;
}
.site-nav__link::after{
  content:"";
  position:absolute;
  left:4px;
  right:4px;
  bottom:4px;
  height:2px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform .22s ease,background .22s ease;
}
.site-nav__link:hover,
.site-nav__link:focus-visible{color:var(--paper);}
.site-nav__link:hover::after,
.site-nav__link:focus-visible::after{transform:scaleX(1);}
.site-nav__link[aria-current="page"]{color:var(--cyan);}
.site-nav__link[aria-current="page"]::after{
  transform:scaleX(1);
  background:var(--orange);
}

/* 快速访问 */
.quick-cta{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:10px 20px;
  background:var(--cyan);
  color:var(--pitch);
  font-size:13px;
  font-weight:700;
  letter-spacing:.1em;
  clip-path:var(--cut-shape);
  transition:background .18s ease,transform .12s ease;
}
.quick-cta:hover{background:var(--cyan-soft);}
.quick-cta:active{transform:translateY(1px);}

/* 移动菜单按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  padding:9px 12px;
  border:1px solid var(--line);
  color:var(--paper);
  font-size:12px;
  font-weight:600;
  letter-spacing:.12em;
  clip-path:var(--cut-shape);
  transition:border-color .18s ease,color .18s ease;
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan);}
.nav-toggle__bars{
  position:relative;
  display:block;
  width:18px;
  height:12px;
  background:linear-gradient(var(--cyan),var(--cyan)) center/100% 2px no-repeat;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  height:2px;
  background:var(--cyan);
  transition:transform .2s ease;
}
.nav-toggle__bars::before{top:0;}
.nav-toggle__bars::after{bottom:0;}
.site-header[data-open] .nav-toggle__bars{background-size:0 2px;}
.site-header[data-open] .nav-toggle__bars::before{transform:translateY(5px) rotate(45deg);}
.site-header[data-open] .nav-toggle__bars::after{transform:translateY(-5px) rotate(-45deg);}

/* 滚动进度 */
.progress{
  position:absolute;
  left:0;
  bottom:0;
  width:100%;
  height:2px;
  z-index:2;
  transform:scaleX(var(--p,0));
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan),var(--amber) 62%,var(--orange));
  pointer-events:none;
}

/* 左侧导轨（桌面端边框） */
.rail{display:none;}

@media (min-width:1000px){
  body{padding-left:var(--rail);}
  .rail{
    display:flex;
    position:fixed;
    left:0;
    top:0;
    bottom:0;
    width:var(--rail);
    z-index:90;
    flex-direction:column;
    align-items:center;
    justify-content:space-between;
    padding:18px 0;
    background:var(--pitch);
    border-right:1px solid var(--line);
  }
  .rail__line{
    width:1px;
    height:56px;
    background:linear-gradient(180deg,var(--cyan),transparent);
  }
  .rail__text{
    writing-mode:vertical-rl;
    text-orientation:mixed;
    font-size:10px;
    letter-spacing:.36em;
    color:var(--mist);
    text-transform:uppercase;
  }
  .rail__ticks{
    width:14px;
    height:120px;
    background-image:repeating-linear-gradient(180deg,var(--line) 0 1px,transparent 1px 10px);
    opacity:.9;
  }
}

/* ---------- 6. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,8vw,96px);
  background:var(--night);
  border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-2px;
  left:0;
  width:min(340px,64%);
  height:3px;
  background:linear-gradient(90deg,var(--cyan),var(--orange));
}

.site-footer__inner{
  max-width:var(--shell);
  margin-inline:auto;
  padding:clamp(36px,5vw,64px) var(--pad) clamp(28px,4vw,44px);
  display:grid;
  gap:clamp(28px,4vw,48px);
  grid-template-columns:1fr;
}
@media (min-width:760px){
  .site-footer__inner{grid-template-columns:1.1fr 1.4fr;}
}
@media (min-width:1080px){
  .site-footer__inner{grid-template-columns:1.05fr 1.6fr 1fr;}
}

.footer-brand__name{
  font-family:var(--font-head);
  font-size:clamp(24px,3vw,32px);
  font-weight:800;
  letter-spacing:.04em;
  color:var(--paper);
}
.footer-brand__note{
  margin-top:6px;
  font-size:13px;
  letter-spacing:.04em;
  color:var(--mist);
}
.footer-tags{
  display:flex;
  flex-wrap:wrap;
  gap:6px;
  margin-top:16px;
}
.footer-tag{
  font-size:11px;
  letter-spacing:.1em;
  padding:4px 9px;
  color:var(--cyan);
  border:1px solid var(--line);
  background:rgba(0,229,195,.06);
}

.footer-cols{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(140px,1fr));
  gap:clamp(20px,3vw,32px);
}
.footer-col__title{
  margin-bottom:12px;
  padding-bottom:10px;
  border-bottom:1px solid var(--line-soft);
  font-family:var(--font-body);
  font-size:12px;
  font-weight:700;
  letter-spacing:.16em;
  color:var(--amber);
}
.footer-col__list{display:grid;gap:8px;}
.footer-col__link{
  display:inline-block;
  font-size:14px;
  line-height:1.5;
  color:var(--mist);
  transition:color .16s ease;
}
.footer-col__link::before{
  content:"—";
  margin-right:8px;
  color:var(--line);
  transition:color .16s ease;
}
.footer-col__link:hover,
.footer-col__link:focus-visible{color:var(--cyan);}
.footer-col__link:hover::before,
.footer-col__link:focus-visible::before{color:var(--orange);}

.footer-contact{
  grid-column:1 / -1;
  padding:18px 20px;
  border:1px solid var(--line-soft);
  background:linear-gradient(160deg,rgba(11,59,46,.72),rgba(6,31,25,.6));
  clip-path:var(--cut-shape);
}
@media (min-width:1080px){
  .footer-contact{grid-column:auto;}
}
.footer-contact__title{
  margin-bottom:10px;
  font-family:var(--font-head);
  font-size:15px;
  font-weight:700;
  letter-spacing:.14em;
  color:var(--paper);
}
.footer-contact__line{
  display:flex;
  gap:10px;
  padding:7px 0;
  border-top:1px dashed rgba(30,90,73,.6);
  font-size:13px;
  line-height:1.6;
  color:var(--mist);
}
.footer-contact__line:first-of-type{border-top:0;}
.footer-contact__key{
  flex:0 0 46px;
  padding-top:2px;
  font-size:11px;
  letter-spacing:.14em;
  color:var(--cyan);
}
.footer-contact__val{color:var(--paper);word-break:break-word;}
.footer-contact__note{
  margin-top:12px;
  font-size:12px;
  line-height:1.7;
  color:var(--mist);
}

.site-footer__base{
  max-width:var(--shell);
  margin-inline:auto;
  padding:16px var(--pad) 30px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px 24px;
  border-top:1px solid var(--line);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--mist);
}
.footer-base__copy{margin-inline-end:auto;}
.footer-base__icp{color:rgba(184,199,193,.8);}

.to-top{
  position:fixed;
  right:clamp(14px,3vw,28px);
  bottom:clamp(14px,3vw,28px);
  z-index:70;
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:10px 16px;
  background:rgba(6,31,25,.96);
  border:1px solid var(--line);
  color:var(--cyan);
  font-size:12px;
  font-weight:700;
  letter-spacing:.12em;
  clip-path:var(--cut-shape);
  opacity:0;
  visibility:hidden;
  transform:translateY(12px);
  transition:opacity .22s ease,transform .22s ease,visibility .22s ease,color .18s ease,background .18s ease;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:none;}
.to-top:hover{background:rgba(0,229,195,.14);color:var(--paper);}

/* ---------- 7. 布局与分区 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--pad);
}

.section{padding-block:clamp(40px,6vw,80px);}
.section--tight{padding-block:clamp(28px,4vw,48px);}
.section--night{background:var(--night);}
.section--paper{
  background:var(--paper);
  color:var(--pitch);
}
.section--paper h1,
.section--paper h2,
.section--paper h3,
.section--paper h4{color:var(--pitch);}
.section--paper p,
.section--paper li{color:#1C3A31;}

.stack > * + *{margin-top:var(--stack-gap,16px);}

.grid{
  display:grid;
  gap:clamp(16px,2.4vw,28px);
}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr));}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(min(100%,250px),1fr));}

.split{display:grid;gap:clamp(20px,3vw,40px);}
@media (min-width:900px){
  .split{grid-template-columns:minmax(0,5fr) minmax(0,7fr);}
  .split--reverse{grid-template-columns:minmax(0,7fr) minmax(0,5fr);}
}

.divider-diag{
  height:1px;
  border:0;
  background:linear-gradient(90deg,transparent,var(--line) 18%,var(--cyan) 50%,var(--line) 82%,transparent);
  opacity:.7;
}

/* ---------- 8. 文字组件 ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  font-weight:700;
  letter-spacing:.18em;
  color:var(--cyan);
  text-transform:uppercase;
}
.eyebrow::before{
  content:"";
  width:18px;
  height:2px;
  background:var(--orange);
  flex:0 0 auto;
}

.num{
  font-family:var(--font-num);
  font-weight:700;
  letter-spacing:-.02em;
  line-height:.95;
  font-variant-numeric:tabular-nums;
}
.num--xl{font-size:clamp(2.6rem,7vw,5.4rem);}
.num--cyan{color:var(--cyan);}
.num--orange{color:var(--orange);}
.num--amber{color:var(--amber);}

.prose{
  font-size:17px;
  line-height:1.8;
  color:var(--mist);
}
.prose > * + *{margin-top:1.1em;}
.prose h2,
.prose h3{color:var(--paper);margin-top:1.8em;}
.prose strong{color:var(--paper);}
.prose ul{display:grid;gap:.55em;}
.prose ul li{
  position:relative;
  padding-left:20px;
}
.prose ul li::before{
  content:"";
  position:absolute;
  left:0;
  top:.78em;
  width:8px;
  height:2px;
  background:var(--cyan);
}
.prose a{
  color:var(--cyan);
  border-bottom:1px solid rgba(0,229,195,.42);
}
.prose a:hover{border-bottom-color:var(--cyan);}
.section--paper .prose{color:#1C3A31;}
.section--paper .prose h2,
.section--paper .prose h3,
.section--paper .prose strong{color:var(--pitch);}
.section--paper .prose a{color:#0B3B2E;border-bottom-color:rgba(11,59,46,.4);}

/* ---------- 9. 按钮与标签 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  font-size:14px;
  font-weight:700;
  letter-spacing:.08em;
  border:1px solid transparent;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .12s ease;
}
.btn:active{transform:translateY(1px);}
.btn--cut{clip-path:var(--cut-shape);}
.btn--primary{background:var(--cyan);color:var(--pitch);}
.btn--primary:hover{background:var(--cyan-soft);}
.btn--accent{background:var(--orange);color:#200C03;}
.btn--accent:hover{background:#FF8A5E;}
.btn--ghost{border-color:var(--line);color:var(--paper);}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);}
.section--paper .btn--ghost{border-color:rgba(11,59,46,.35);color:var(--pitch);}
.section--paper .btn--ghost:hover{border-color:var(--ink);}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  font-size:11px;
  font-weight:600;
  letter-spacing:.12em;
  color:var(--mist);
  border:1px solid var(--line);
  background:rgba(4,17,13,.5);
}
.tag--cyan{color:var(--cyan);border-color:rgba(0,229,195,.45);background:rgba(0,229,195,.08);}
.tag--orange{color:var(--orange);border-color:rgba(255,107,53,.45);background:rgba(255,107,53,.08);}
.tag--amber{color:var(--amber);border-color:rgba(255,176,58,.45);background:rgba(255,176,58,.08);}

/* ---------- 10. 面板 ---------- */
.cut{clip-path:var(--cut-shape);}

.panel{
  position:relative;
  padding:clamp(18px,2.4vw,28px);
  background:linear-gradient(155deg,rgba(6,31,25,.96),rgba(11,59,46,.7));
  border:1px solid var(--line-soft);
  clip-path:var(--cut-shape);
}
.panel--flat{
  clip-path:none;
  border-radius:2px;
}
.panel--accent::before,
.panel--warn::before{
  content:"";
  position:absolute;
  left:0;
  top:0;
  width:64px;
  height:3px;
  background:var(--cyan);
}
.panel--warn::before{background:var(--orange);}

.stat-band{
  display:grid;
  gap:1px;
  background:var(--line-soft);
  border:1px solid var(--line-soft);
}
@media (min-width:640px){
  .stat-band{grid-template-columns:repeat(auto-fit,minmax(160px,1fr));}
}
.stat-band__item{
  padding:clamp(14px,2vw,22px);
  background:rgba(6,31,25,.88);
}
.stat-band__label{
  display:block;
  margin-bottom:6px;
  font-size:11px;
  letter-spacing:.14em;
  color:var(--mist);
}

/* ---------- 11. 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--mist);
}
.breadcrumb a{color:var(--mist);transition:color .16s ease;}
.breadcrumb a:hover{color:var(--cyan);}
.breadcrumb__sep{color:var(--line);}
.breadcrumb [aria-current="page"]{color:var(--paper);}

/* ---------- 12. 图片容器 ---------- */
.media{
  position:relative;
  overflow:hidden;
  aspect-ratio:16 / 9;
  background:var(--pitch);
  border:1px solid var(--line-soft);
  clip-path:var(--cut-shape);
}
.media > img{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(.92) contrast(1.06);
}
.media--wide{aspect-ratio:21 / 9;}
.media--tall{aspect-ratio:4 / 5;}
.media--square{aspect-ratio:1 / 1;}

.media__net{
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    repeating-linear-gradient(0deg,rgba(0,229,195,.14) 0 1px,transparent 1px 14px),
    repeating-linear-gradient(90deg,rgba(0,229,195,.14) 0 1px,transparent 1px 14px);
  opacity:.45;
  mix-blend-mode:screen;
}
.media__glow{
  position:absolute;
  inset:0;
  pointer-events:none;
  background:radial-gradient(circle at 72% 18%,rgba(0,229,195,.28),transparent 58%);
}
.media__caption{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  padding:12px 16px;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--paper);
  background:linear-gradient(0deg,rgba(4,17,13,.94),rgba(4,17,13,0));
}
.media__ph{
  position:absolute;
  inset:0;
  display:flex;
  align-items:center;
  justify-content:center;
  font-family:var(--font-num);
  font-size:12px;
  letter-spacing:.24em;
  color:rgba(0,229,195,.6);
  background-image:
    repeating-linear-gradient(135deg,rgba(30,90,73,.35) 0 1px,transparent 1px 18px);
}

/* ---------- 13. 章节目录 ---------- */
.toc{
  position:sticky;
  top:calc(var(--header-h) + 20px);
  font-size:13px;
}
.toc__title{
  margin-bottom:12px;
  font-size:11px;
  font-weight:700;
  letter-spacing:.18em;
  color:var(--amber);
}
.toc__list{
  display:grid;
  gap:2px;
  border-left:1px solid var(--line);
}
.toc__link{
  display:block;
  margin-left:-1px;
  padding:7px 12px;
  border-left:2px solid transparent;
  color:var(--mist);
  line-height:1.4;
  transition:color .16s ease,background .16s ease,border-color .16s ease;
}
.toc__link:hover{color:var(--paper);}
.toc__link.is-active{
  color:var(--cyan);
  border-left-color:var(--cyan);
  background:rgba(0,229,195,.07);
}

/* ---------- 14. 显现动效 @media ---------- */
.js-reveal [data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .5s ease,transform .5s ease;
  will-change:opacity,transform;
}
.js-reveal [data-reveal].is-in{
  opacity:1;
  transform:none;
}

/* ---------- 15. 响应式：移动端页头 ---------- */
@media (max-width:939px){
  .brand{order:1;}
  .quick-cta{
    order:2;
    margin-inline-start:0;
    padding:9px 14px;
    font-size:12px;
  }
  .nav-toggle{
    display:inline-flex;
    order:3;
    margin-inline-start:auto;
  }
  .site-nav{
    position:absolute;
    left:0;
    right:0;
    top:100%;
    display:none;
    margin:0;
    max-height:72vh;
    overflow-y:auto;
    padding:8px var(--pad) 22px;
    background:var(--night);
    border-bottom:1px solid var(--line);
    box-shadow:0 26px 44px rgba(0,0,0,.5);
  }
  .site-header[data-open] .site-nav{display:block;}
  .site-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }
  .site-nav__item + .site-nav__item{border-top:1px solid var(--line-soft);}
  .site-nav__link{
    padding:15px 2px;
    font-size:16px;
    color:var(--paper);
  }
  .site-nav__link::after{
    left:2px;
    right:auto;
    width:20px;
    bottom:10px;
  }
}

@media (max-width:560px){
  .brand__tag{display:none;}
  .brand__name{font-size:18px;}
  .site-footer__base{font-size:11px;}
  .to-top{padding:9px 12px;font-size:11px;}
}

/* ---------- 16. 减少动态偏好 ---------- */
@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;
  }
  .js-reveal [data-reveal]{
    opacity:1 !important;
    transform:none !important;
  }
  .to-top{transform:none;}
}