/* ============================================================
   猛犸体育 MM SPORTS · 共享样式表  /assets/site.css
   技术蓝图网格 + 切角面板 + 冰原/熔岩撞色
   ============================================================ */

/* ---------- 1. 设计变量 ---------- */
:root{
  --ink:#1C1F24;
  --ice:#4A9FD8;
  --lava:#F26A2E;
  --grass:#3F8F5A;
  --snow:#F4F7F9;
  --graphite:#0E1116;
  --glacier:#A9B6C2;
  --pulse:#2ED3C6;
  --frost:#DCEAF2;
  --night:#14233A;

  --line:rgba(169,182,194,.30);
  --line-soft:rgba(169,182,194,.16);
  --line-dark:rgba(28,31,36,.12);

  --cut:18px;
  --shell:1240px;
  --gutter:clamp(16px,4vw,32px);

  --font-head:"Montserrat","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"IBM Plex Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;

  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow-card:0 16px 34px rgba(20,35,58,.13);
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:120px}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,dl,dd,dt,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
button{font:inherit;color:inherit;background:none;border:0;margin:0;cursor:pointer}
img,svg,video{display:block;max-width:100%}
table{border-collapse:collapse;width:100%}
hr{border:0;border-top:1px solid var(--line-dark);margin:0}

/* ---------- 3. 中文排版与基础文字 ---------- */
body{
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.7;
  color:var(--ink);
  background:var(--snow);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5,h6{
  font-family:var(--font-head);
  font-weight:800;
  line-height:1.14;
  letter-spacing:-.015em;
  color:var(--ink);
  text-wrap:balance;
}
h1{font-size:clamp(30px,5.2vw,64px);font-weight:900}
h2{font-size:clamp(24px,3.4vw,42px)}
h3{font-size:clamp(19px,2.2vw,26px);line-height:1.24}
h4{font-size:17px;line-height:1.32;font-weight:800}
p{text-wrap:pretty}
strong{font-weight:800}
a{color:var(--night);text-decoration:underline;text-decoration-color:rgba(74,159,216,.65);text-underline-offset:3px;transition:color .18s var(--ease),text-decoration-color .18s var(--ease)}
a:hover{text-decoration-color:var(--lava)}
small{font-size:13px}
code,kbd{font-family:var(--font-mono);font-size:.92em;background:var(--frost);padding:2px 6px;border-radius:2px}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
:focus-visible{outline:3px solid var(--pulse);outline-offset:3px}
::selection{background:var(--lava);color:#fff}

/* ---------- 4. 骨架与容器 ---------- */
#main-content{display:block}
.shell{width:100%;max-width:var(--shell);margin:0 auto;padding:0 var(--gutter)}
.section{padding:clamp(48px,7vw,96px) 0;position:relative}
.section--frost{background:var(--frost);color:var(--ink)}
.section--dark{background:var(--graphite);color:var(--frost)}
.section--night{background:var(--night);color:var(--frost)}
.section--dark h2,.section--night h2,.section--dark h1,.section--night h1,.section--dark h3,.section--night h3{color:var(--snow)}
.section--blueprint::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(90deg,var(--line-soft) 1px,transparent 1px),
    linear-gradient(0deg,var(--line-soft) 1px,transparent 1px);
  background-size:72px 72px;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--ice);margin-bottom:14px;
}
.eyebrow::before{content:"";width:24px;height:2px;background:var(--lava);flex:0 0 auto}
.lede{font-size:clamp(16px,1.5vw,19px);line-height:1.75;max-width:64ch}
.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}

/* ---------- 5. 按钮 ---------- */
.btn{
  --btn-bg:var(--lava);
  --btn-fg:#fff;
  --btn-bd:transparent;
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;
  font-family:var(--font-head);font-weight:800;font-size:15px;line-height:1.2;letter-spacing:.01em;
  color:var(--btn-fg);background:var(--btn-bg);border:1px solid var(--btn-bd);
  text-decoration:none;text-align:center;cursor:pointer;
  clip-path:polygon(0 0,calc(100% - 12px) 0,100% 12px,100% 100%,12px 100%,0 calc(100% - 12px));
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.btn:hover{--btn-bg:#d8551c;transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn:focus-visible{outline:none;box-shadow:inset 0 0 0 3px var(--pulse)}
.btn--sm{padding:9px 16px;font-size:13.5px}
.btn--ice{--btn-bg:var(--ice);--btn-fg:#fff}
.btn--ice:hover{--btn-bg:#2f83bb}
.btn--grass{--btn-bg:var(--grass);--btn-fg:#fff}
.btn--grass:hover{--btn-bg:#337a4c}
.btn--ghost{--btn-bg:transparent;--btn-fg:var(--frost);--btn-bd:rgba(169,182,194,.45)}
.btn--ghost:hover{--btn-bg:rgba(74,159,216,.16);--btn-fg:#fff;--btn-bd:var(--ice)}

/* ---------- 6. 面包屑 ---------- */
.breadcrumbs{margin:0 0 20px}
.breadcrumbs__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-family:var(--font-mono);font-size:12px;letter-spacing:.08em}
.breadcrumbs__list li{display:flex;align-items:center;gap:8px}
.breadcrumbs__list li+li::before{content:"/";color:rgba(169,182,194,.75)}
.breadcrumbs__link{color:var(--ice);text-decoration:none}
.breadcrumbs__link:hover{color:var(--lava)}
.breadcrumbs__current{color:var(--ink);opacity:.7}

/* ---------- 7. 面板 / 卡片 / 标签 / 数据条 ---------- */
.panel{
  background:#fff;border:1px solid var(--line-dark);
  padding:clamp(20px,3vw,32px);
}
.panel--cut{
  border:0;padding:clamp(20px,3vw,32px);
  box-shadow:inset 0 0 0 1px var(--line-dark);
  clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,0 100%);
}
.panel--dark{background:var(--night);color:var(--frost);border-color:rgba(74,159,216,.28)}
.panel--dark h3,.panel--dark h2{color:var(--snow)}
.card{
  display:block;text-decoration:none;color:inherit;background:#fff;
  border:1px solid var(--line-dark);padding:22px;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.card:hover{transform:translateY(-4px);border-color:var(--ice);box-shadow:var(--shadow-card)}
.card:focus-visible{outline:none;box-shadow:0 0 0 3px var(--pulse),var(--shadow-card)}
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:4px 10px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;
  color:var(--ice);border:1px solid currentColor;border-radius:2px;
}
.tag--lava{color:var(--lava)}
.tag--grass{color:var(--grass)}
.tag--pulse{color:#12a397}
.data-strip{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(0,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.data-strip__cell{background:#fff;padding:16px 18px}
.data-strip__num{display:block;font-family:var(--font-mono);font-size:clamp(20px,2.4vw,28px);font-weight:600;color:var(--night);line-height:1.2}
.data-strip__label{display:block;margin-top:6px;font-size:12px;letter-spacing:.1em;color:var(--ink);opacity:.68}

/* ---------- 8. 图文/媒体容器基础规则 ---------- */
.figure{margin:0;display:block}
.figure__frame{
  position:relative;overflow:hidden;
  background:linear-gradient(140deg,var(--night),var(--graphite) 62%,#1b3550);
  clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,0 100%);
}
.figure__frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.55;
  background-image:
    linear-gradient(90deg,rgba(169,182,194,.16) 1px,transparent 1px),
    linear-gradient(0deg,rgba(169,182,194,.16) 1px,transparent 1px);
  background-size:44px 44px;
}
.figure__frame>img,.figure__frame>svg,.figure__frame>picture>img{
  width:100%;height:100%;object-fit:cover;display:block;
}
.figure--16x9 .figure__frame{aspect-ratio:16/9}
.figure--4x3 .figure__frame{aspect-ratio:4/3}
.figure--1x1 .figure__frame{aspect-ratio:1/1}
.figure--wide .figure__frame{aspect-ratio:21/9}
.figure__caption{margin-top:10px;font-family:var(--font-mono);font-size:12.5px;letter-spacing:.04em;color:var(--glacier)}

/* ---------- 9. 长文排版 ---------- */
.prose{max-width:74ch;font-size:17px}
.prose>*+*{margin-top:1em}
.prose h2{margin-top:1.7em;font-size:clamp(22px,2.6vw,32px)}
.prose h3{margin-top:1.5em}
.prose ul,.prose ol{padding-left:0}
.prose li+li{margin-top:.5em}
.prose ul li{position:relative;padding-left:22px}
.prose ul li::before{
  content:"";position:absolute;left:0;top:.62em;width:9px;height:9px;
  background:var(--ice);clip-path:polygon(0 0,100% 0,100% 70%,70% 100%,0 100%);
}
.prose ol{counter-reset:item}
.prose ol li{position:relative;padding-left:30px;counter-increment:item}
.prose ol li::before{
  content:counter(item,decimal-leading-zero);position:absolute;left:0;top:.15em;
  font-family:var(--font-mono);font-size:13px;color:var(--lava);
}
.prose blockquote{
  border-left:3px solid var(--lava);padding:6px 0 6px 20px;
  font-family:var(--font-head);font-weight:800;font-size:19px;line-height:1.5;color:var(--night);
}

/* ---------- 10. 可复用的显现协议 ---------- */
.has-js [data-reveal]{opacity:0;transform:translateY(18px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.has-js [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 11. 跳过链接 ---------- */
.skip-link{
  position:fixed;left:16px;top:-80px;z-index:200;
  padding:11px 20px;background:var(--lava);color:#fff;
  font-family:var(--font-head);font-weight:800;font-size:14px;text-decoration:none;
  border-radius:0 0 10px 10px;transition:top .2s var(--ease);
}
.skip-link:focus{top:0}

/* ---------- 12. 页头 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:linear-gradient(180deg,rgba(14,17,22,.99),rgba(14,17,22,.92));
  color:var(--snow);
  border-bottom:1px solid rgba(74,159,216,.3);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
}
.site-header__grid{
  position:absolute;inset:0;pointer-events:none;opacity:.9;
  background-image:
    linear-gradient(90deg,rgba(169,182,194,.2) 1px,transparent 1px),
    linear-gradient(0deg,rgba(169,182,194,.14) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:linear-gradient(90deg,#000 0%,rgba(0,0,0,.3) 58%,transparent 100%);
  mask-image:linear-gradient(90deg,#000 0%,rgba(0,0,0,.3) 58%,transparent 100%);
}
.site-header__inner{
  position:relative;z-index:1;
  width:100%;max-width:var(--shell);margin:0 auto;
  padding:12px var(--gutter);
  display:flex;align-items:center;gap:clamp(12px,2vw,24px);
}

/* 品牌 */
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:inherit;flex:0 0 auto;min-width:0}
.brand--footer{margin-bottom:16px}
.brand__mark{
  position:relative;flex:0 0 auto;width:42px;height:42px;
  background:linear-gradient(145deg,var(--ice),var(--night) 78%);
  clip-path:polygon(0 0,100% 0,100% 68%,68% 100%,0 100%);
}
.brand__tusk{
  position:absolute;width:13px;height:19px;
  border:3px solid var(--pulse);
  border-top-color:transparent;border-right-color:transparent;
  border-radius:0 0 0 100%;
  transform:rotate(-14deg);
}
.brand__tusk--a{left:7px;top:12px}
.brand__tusk--b{left:17px;top:13px;height:15px;border-color:var(--lava);border-top-color:transparent;border-right-color:transparent}
.brand__text{display:flex;flex-direction:column;min-width:0}
.brand__name{
  font-family:var(--font-head);font-weight:900;font-size:16px;line-height:1.15;
  letter-spacing:.02em;color:var(--snow);white-space:nowrap;
}
.brand__tag{
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em;line-height:1.5;
  color:var(--glacier);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}

/* 悬浮胶囊导航 */
.nav-capsule{flex:1 1 auto;min-width:0;display:flex;justify-content:center}
.nav-capsule__list{
  display:flex;align-items:center;gap:4px;
  padding:5px;max-width:100%;
  background:rgba(244,247,249,.07);
  border:1px solid rgba(169,182,194,.24);
  border-radius:999px;
  overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;
}
.nav-capsule__list::-webkit-scrollbar{display:none}
.nav-capsule__item{flex:0 0 auto}
.nav-capsule__link{
  display:block;white-space:nowrap;
  padding:8px 14px;border-radius:999px;
  font-family:var(--font-head);font-weight:700;font-size:14px;letter-spacing:.01em;
  color:var(--frost);text-decoration:none;
  transition:background-color .18s var(--ease),color .18s var(--ease),box-shadow .18s var(--ease);
}
.nav-capsule__link:hover{background:rgba(74,159,216,.2);color:#fff}
.nav-capsule__link:focus-visible{outline:none;box-shadow:inset 0 0 0 3px var(--pulse)}
.nav-capsule__link[aria-current="page"]{
  background:var(--lava);color:#fff;
  box-shadow:0 6px 16px rgba(242,106,46,.36);
}

/* 右侧动作区 */
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;margin-left:auto}
.nav-toggle{
  display:none;align-items:center;gap:9px;
  padding:9px 14px;border-radius:999px;
  background:rgba(244,247,249,.07);
  border:1px solid rgba(169,182,194,.3);
  color:var(--snow);font-family:var(--font-head);font-weight:800;font-size:13.5px;
  transition:background-color .18s var(--ease),border-color .18s var(--ease);
}
.nav-toggle:hover{background:rgba(74,159,216,.18);border-color:var(--ice)}
.nav-toggle:focus-visible{outline:none;box-shadow:inset 0 0 0 3px var(--pulse)}
.nav-toggle__bars{position:relative;display:block;width:18px;height:12px;flex:0 0 auto}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:100%;height:2px;background:var(--pulse);
  transition:transform .2s var(--ease),top .2s var(--ease);
}
.nav-toggle__bars::before{top:1px}
.nav-toggle__bars::after{top:9px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{top:5px;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{top:5px;transform:rotate(-45deg)}
.nav-toggle__label{white-space:nowrap}

/* 滚动脉冲进度条 */
.scroll-progress{
  position:absolute;left:0;right:0;bottom:-1px;height:3px;
  background:rgba(169,182,194,.16);overflow:hidden;
}
.scroll-progress__bar{
  display:block;height:100%;width:100%;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--ice) 0%,var(--pulse) 55%,var(--lava) 100%);
  transition:transform .12s linear;
}

/* ---------- 13. 页脚 ---------- */
.site-footer{position:relative;background:var(--graphite);color:var(--glacier)}
.footer-ridge{position:relative;height:18px;overflow:hidden;background:linear-gradient(90deg,var(--night),var(--graphite))}
.footer-ridge::after{
  content:"";position:absolute;inset:0;opacity:.55;
  background:repeating-linear-gradient(118deg,rgba(74,159,216,.55) 0 2px,transparent 2px 15px);
}
.footer-ridge__spark{
  position:absolute;left:0;top:0;bottom:0;width:18%;min-width:110px;z-index:1;
  background:linear-gradient(90deg,var(--lava),rgba(242,106,46,0));
  clip-path:polygon(0 0,100% 0,72% 100%,0 100%);
}
.footer-ridge__line{
  position:absolute;left:0;right:0;top:8px;height:2px;z-index:2;
  background:repeating-linear-gradient(90deg,rgba(46,211,198,.85) 0 26px,transparent 26px 36px);
}
.footer-inner{
  width:100%;max-width:var(--shell);margin:0 auto;
  padding:clamp(40px,6vw,64px) var(--gutter) 32px;
  display:grid;grid-template-columns:minmax(0,1.7fr) repeat(3,minmax(0,1fr));
  gap:clamp(24px,3vw,44px);
  border-bottom:1px solid var(--line-soft);
}
.footer-brand{min-width:0}
.footer-lede{max-width:40ch;font-size:15px;line-height:1.8;color:var(--glacier)}
.footer-stats{display:flex;flex-wrap:wrap;gap:16px 30px;margin-top:20px}
.footer-stat{min-width:82px}
.footer-stat__label{font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;color:var(--glacier);text-transform:uppercase}
.footer-stat__num{font-family:var(--font-mono);font-weight:600;font-size:22px;line-height:1.3;color:var(--pulse)}
.footer-col{min-width:0}
.footer-col__title{
  font-family:var(--font-mono);font-size:12px;font-weight:600;
  letter-spacing:.18em;text-transform:uppercase;color:var(--frost);
  padding-bottom:12px;margin-bottom:14px;border-bottom:1px solid var(--line-soft);
}
.footer-col__list{display:flex;flex-direction:column;gap:2px}
.footer-col__list a{
  display:inline-block;padding:5px 0;
  color:var(--glacier);font-size:15px;text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease),padding-left .18s var(--ease);
}
.footer-col__list a:hover{color:#fff;border-bottom-color:var(--lava);padding-left:6px}
.footer-col__list a:focus-visible{outline:none;box-shadow:inset 0 0 0 2px var(--pulse);padding-left:6px}
.footer-meta{
  width:100%;max-width:var(--shell);margin:0 auto;
  padding:22px var(--gutter) 44px;
  display:flex;flex-direction:column;gap:10px;
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.02em;color:var(--glacier);
}
.footer-meta__contact{display:flex;flex-wrap:wrap;align-items:center;gap:6px}
.footer-meta__value{color:var(--frost)}
.footer-meta__sep{color:rgba(169,182,194,.55)}
.footer-meta__legal{display:flex;flex-wrap:wrap;align-items:center;gap:8px;color:rgba(169,182,194,.8)}
.copy-btn{
  margin-left:6px;padding:3px 10px;border-radius:2px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.06em;
  color:var(--pulse);border:1px solid rgba(46,211,198,.5);
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.copy-btn:hover{background:rgba(46,211,198,.16)}
.copy-btn:focus-visible{outline:none;box-shadow:0 0 0 3px var(--pulse)}
.copy-btn[data-copied]{color:#8fe3c9;border-color:var(--grass);background:rgba(63,143,90,.24)}

/* 返回顶部 */
.to-top{
  position:fixed;right:18px;bottom:18px;z-index:70;
  display:inline-flex;align-items:center;justify-content:center;
  padding:11px 18px;
  font-family:var(--font-head);font-weight:800;font-size:13px;letter-spacing:.04em;
  color:var(--snow);background:var(--night);
  border:1px solid rgba(74,159,216,.55);
  clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,10px 100%,0 calc(100% - 10px));
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s linear,background-color .18s var(--ease);
}
.to-top[data-visible]{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:var(--lava);border-color:var(--lava)}
.to-top:focus-visible{outline:none;box-shadow:inset 0 0 0 3px var(--pulse)}

/* ---------- 14. 响应式 ---------- */
@media (max-width:1080px){
  .footer-inner{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:960px){
  .nav-toggle{display:inline-flex}
  .nav-capsule{
    position:absolute;left:var(--gutter);right:var(--gutter);
    top:calc(100% + 10px);
    display:block;
    opacity:0;visibility:hidden;transform:translateY(-10px);
    transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s linear;
  }
  .nav-capsule[data-open]{opacity:1;visibility:visible;transform:none}
  .nav-capsule__list{
    flex-direction:column;align-items:stretch;gap:2px;
    padding:10px;border-radius:16px;
    background:rgba(14,17,22,.99);
    border:1px solid rgba(74,159,216,.4);
    box-shadow:0 24px 50px rgba(0,0,0,.45);
    max-height:70vh;overflow-y:auto;
  }
  .nav-capsule__item{flex:1 1 auto}
  .nav-capsule__link{
    padding:13px 16px;border-radius:10px;font-size:16px;
    border-left:3px solid transparent;
  }
  .nav-capsule__link[aria-current="page"]{border-radius:10px;border-left-color:rgba(255,255,255,.65)}
  .brand__tag{display:none}
  .grid--3,.grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .data-strip{grid-auto-flow:row;grid-auto-columns:auto;grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:640px){
  .header-cta{display:none}
  .brand__mark{width:36px;height:36px}
  .brand__tusk{transform:rotate(-14deg) scale(.88);transform-origin:left top}
  .brand__name{font-size:15px}
  .footer-inner{grid-template-columns:1fr}
  .grid--2,.grid--3,.grid--4{grid-template-columns:1fr}
  .data-strip{grid-template-columns:1fr}
  .footer-meta{padding-bottom:88px}
  .to-top{right:12px;bottom:12px}
}

/* ---------- 15. 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}
  .scroll-progress__bar{transition:none}
}