/* =========================================================
   星空体育在线 · 共享站点样式 /assets/site.css
   深空观测站 + 未来竞技场：框架式导航、星轨刻度、纸张叠层
   ========================================================= */

:root{
  --ink:#05060E;
  --deep:#0B1230;
  --indigo:#171E42;
  --star:#F2F4FF;
  --mist:#8892BB;
  --violet:#7C4DFF;
  --cyan:#25F4E0;
  --orange:#FF8A3D;
  --band:#3A1E6E;
  --line:#2A2F4A;

  --header-h:76px;
  --edge:14px;
  --wrap:1280px;
  --radius:2px;
  --fade:180ms;

  --font-head:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:var(--font-head);
  --font-num:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono","Courier New",monospace;

  --fs-label:12px;
  --fs-note:14px;
  --fs-body:17px;
  --fs-lead:24px;
  --fs-h2:34px;
  --fs-h1:56px;
  --fs-mega:180px;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  padding:var(--header-h) var(--edge) 0;
  min-height:100vh;
  color:var(--star);
  background-color:var(--ink);
  background-image:
    radial-gradient(1100px 620px at 84% -6%, rgba(124,77,255,.30), transparent 62%),
    radial-gradient(760px 540px at 3% 14%, rgba(37,244,224,.10), transparent 64%),
    radial-gradient(900px 700px at 62% 96%, rgba(255,138,61,.08), transparent 66%),
    linear-gradient(to bottom, transparent 0 39px, rgba(136,146,187,.06) 39px 40px),
    linear-gradient(to right, transparent 0 39px, rgba(136,146,187,.06) 39px 40px);
  background-attachment:fixed,fixed,fixed,scroll,scroll;
  font-family:var(--font-body);
  font-size:var(--fs-body);
  line-height:1.9;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
/* 页身左右色带：让导航成为视觉边框 */
body::before,
body::after{
  content:"";position:fixed;top:0;bottom:0;width:var(--edge);z-index:80;pointer-events:none;
}
body::before{left:0;background:linear-gradient(180deg,rgba(124,77,255,.88),rgba(124,77,255,.05) 34%,rgba(37,244,224,.16) 72%,rgba(124,77,255,.52))}
body::after{right:0;background:linear-gradient(180deg,rgba(37,244,224,.44),rgba(124,77,255,.08) 42%,rgba(124,77,255,.78))}

h1,h2,h3,h4,h5,h6{
  margin:0 0 .6em;font-family:var(--font-head);font-weight:900;
  letter-spacing:-.02em;line-height:1.15;color:var(--star);
}
h1{font-size:clamp(34px,5.2vw,var(--fs-h1))}
h2{font-size:clamp(24px,3.4vw,var(--fs-h2))}
h3{font-size:var(--fs-lead)}
p{margin:0 0 1.1em}
ul,ol{margin:0 0 1.1em;padding:0;list-style:none}
img,picture,video,svg{display:block;max-width:100%}
img{height:auto}
button{font:inherit;color:inherit;background:none;border:0}
table{border-collapse:collapse;width:100%}
a{
  color:var(--star);text-decoration:none;
  transition:color var(--fade) ease,background-color var(--fade) ease,border-color var(--fade) ease,transform var(--fade) ease;
}
a:hover{color:var(--cyan)}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:1px}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;top:8px;left:50%;z-index:120;
  padding:10px 18px;background:var(--cyan);color:#04121A;
  font-size:14px;font-weight:800;border-radius:var(--radius);
  transform:translate(-50%,-180%);transition:transform var(--fade) ease;
}
.skip-link:focus{transform:translate(-50%,0);color:#04121A}

/* ---------- 框架式头部 ---------- */
.site-header{
  position:fixed;top:0;left:var(--edge);right:var(--edge);z-index:60;
  background:linear-gradient(180deg,rgba(5,6,14,.94),rgba(5,6,14,.78));
  backdrop-filter:blur(10px);
  border-bottom:1px solid rgba(124,77,255,.5);
  transition:border-color var(--fade) ease,background-color var(--fade) ease;
}
.site-header::after{
  content:"";position:absolute;left:0;bottom:-1px;height:1px;width:100%;
  background:linear-gradient(90deg,var(--violet),rgba(124,77,255,0) 62%);
}
.site-header[data-scrolled]{
  border-bottom-color:var(--cyan);
  background:linear-gradient(180deg,rgba(5,6,14,.98),rgba(11,18,48,.88));
  box-shadow:0 20px 44px -34px rgba(37,244,224,.75);
}
.header-grid{
  display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:22px;
  max-width:var(--wrap);margin:0 auto;padding:0 22px;min-height:var(--header-h);
}

.brand{display:inline-flex;align-items:center;gap:12px;padding:6px 0;min-width:0}
.brand__mark{
  position:relative;display:block;width:34px;height:34px;flex:none;
  border:2px solid var(--violet);transform:rotate(8deg);
  background:linear-gradient(140deg,rgba(124,77,255,.30),transparent 70%);
}
.brand__star{
  position:absolute;inset:0;margin:auto;width:10px;height:10px;border-radius:50%;
  background:var(--cyan);box-shadow:0 0 12px 2px rgba(37,244,224,.7);
}
.brand__text{display:flex;flex-direction:column;min-width:0}
.brand__name{font-size:17px;font-weight:900;letter-spacing:-.01em;line-height:1.25;white-space:nowrap}
.brand__statement{font-size:var(--fs-label);letter-spacing:.16em;color:var(--mist);line-height:1.5;white-space:nowrap}
.brand:hover .brand__name{color:var(--cyan)}

.site-nav{justify-self:center;display:flex;align-items:center}
.site-nav__list{display:flex;align-items:center;gap:2px;margin:0}
.site-nav__item{position:relative}
.site-nav__link{
  position:relative;display:inline-block;padding:10px 14px;border:1px solid transparent;border-radius:var(--radius);
  font-size:15px;font-weight:800;letter-spacing:.02em;color:var(--star);
}
.site-nav__link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:6px;height:2px;background:var(--cyan);
  transform:scaleX(0);transform-origin:left center;transition:transform 220ms ease;
}
.site-nav__link:hover{color:var(--cyan)}
.site-nav__link:hover::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{
  color:var(--star);
  background:linear-gradient(180deg,rgba(124,77,255,.42),rgba(124,77,255,.14));
  border-color:rgba(124,77,255,.85);
}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1);background:var(--violet)}
.site-nav__actions{display:none}

.header-actions{display:flex;align-items:center;gap:10px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 18px;border:1px solid transparent;border-radius:var(--radius);
  font-size:14px;font-weight:800;letter-spacing:.06em;cursor:pointer;text-align:center;
  transition:transform 160ms ease,background-color 160ms ease,border-color 160ms ease,color 160ms ease,box-shadow 160ms ease;
}
.btn:hover{transform:translateY(-2px)}
.btn--primary{background:var(--orange);color:#170800;border-color:var(--orange)}
.btn--primary:hover{color:#170800;box-shadow:0 12px 28px -14px rgba(255,138,61,.95)}
.btn--ghost{background:transparent;color:var(--star);border-color:rgba(124,77,255,.75)}
.btn--ghost:hover{color:var(--cyan);border-color:var(--cyan);background:rgba(37,244,224,.08)}
.btn--link{
  padding:0;border:0;background:none;color:var(--cyan);
  text-decoration:underline;text-underline-offset:4px;
}
.btn--link:hover{color:var(--star)}

/* ---------- 移动导航按钮 ---------- */
.nav-toggle{
  display:none;align-items:center;gap:10px;padding:9px 14px;cursor:pointer;
  border:1px solid rgba(124,77,255,.7);border-radius:var(--radius);
  color:var(--star);font-size:var(--fs-label);letter-spacing:.18em;
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle__bars{display:flex;flex-direction:column;gap:4px;width:20px}
.nav-toggle__bars span{display:block;height:2px;background:currentColor;transition:transform 180ms ease,opacity 180ms ease}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ---------- 右侧星轨刻度 ---------- */
.star-rail{
  position:fixed;top:calc(var(--header-h) + 48px);bottom:96px;right:calc(var(--edge) + 8px);
  width:16px;display:flex;justify-content:center;z-index:55;pointer-events:none;
}
.star-rail__line{position:absolute;top:0;bottom:0;left:50%;width:1px;transform:translateX(-50%);background:var(--line)}
.star-rail__fill{
  display:block;width:100%;height:100%;transform:scaleY(0);transform-origin:top center;
  background:linear-gradient(180deg,var(--cyan),var(--violet));will-change:transform;
}
.star-rail__ticks{position:relative;display:flex;flex-direction:column;justify-content:space-between;height:100%}
.star-rail__tick{display:block;width:12px;height:1px;background:rgba(136,146,187,.5)}
.star-rail__tick:nth-child(5n+1){width:16px;background:rgba(37,244,224,.62)}

/* ---------- 通用容器与节奏 ---------- */
.container{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 22px}
.container--narrow{max-width:900px}
.section{padding:72px 0}
.section--tight{padding:40px 0}
.prose{max-width:42em}
.prose p{max-width:40em}
.prose ul,.prose ol{list-style:disc;padding-left:1.3em;max-width:40em}
.prose li{margin-bottom:.4em;color:var(--mist)}
.rule{height:1px;border:0;margin:0;background:linear-gradient(90deg,var(--violet),rgba(124,77,255,0))}
.band{height:6px;background:linear-gradient(90deg,var(--band),rgba(58,30,110,0))}

.label{
  display:inline-block;font-size:var(--fs-label);letter-spacing:.18em;
  text-transform:uppercase;color:var(--mist);
}
.tag{
  display:inline-flex;align-items:center;padding:4px 10px;border:1px solid var(--line);border-radius:var(--radius);
  font-size:var(--fs-label);letter-spacing:.18em;color:var(--mist);
}
.tag--cyan{border-color:rgba(37,244,224,.6);color:var(--cyan)}
.mono{font-family:var(--font-num);font-variant-numeric:tabular-nums;letter-spacing:.02em}

/* ---------- 十二列栅格 ---------- */
.grid{display:grid;gap:var(--gap,24px);grid-template-columns:repeat(12,minmax(0,1fr))}
.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))}
.grid--auto{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.span-3{grid-column:span 3}
.span-4{grid-column:span 4}
.span-5{grid-column:span 5}
.span-6{grid-column:span 6}
.span-7{grid-column:span 7}
.span-8{grid-column:span 8}
.span-9{grid-column:span 9}
.span-12{grid-column:span 12}

/* ---------- 章节头部 ---------- */
.chapter{display:grid;grid-template-columns:minmax(0,3fr) minmax(0,9fr);gap:40px}
.chapter__head{padding-left:18px;border-left:4px solid var(--violet);transition:border-color 220ms ease}
.chapter__head:hover{border-left-color:var(--cyan)}
.chapter__num{display:block;font-family:var(--font-num);font-weight:700;font-size:34px;line-height:1;color:var(--violet)}
.chapter__head:hover .chapter__num{color:var(--cyan)}
.chapter__title{margin:10px 0 0;font-size:var(--fs-lead);font-weight:900}
.chapter__meta{margin:8px 0 0;font-size:var(--fs-label);letter-spacing:.18em;color:var(--mist)}
.chapter__body{min-width:0}

/* ---------- 面包屑 ---------- */
.breadcrumb{margin:0 0 28px}
.breadcrumb ol{display:flex;flex-wrap:wrap;gap:10px;margin:0;font-size:var(--fs-label);letter-spacing:.14em;color:var(--mist)}
.breadcrumb li{display:flex;align-items:center;gap:10px;color:var(--mist)}
.breadcrumb li+li::before{content:"/";color:var(--line)}
.breadcrumb a{color:var(--mist)}
.breadcrumb a:hover{color:var(--cyan)}

/* ---------- 数据面板与卡片 ---------- */
.panel{
  position:relative;padding:24px;border:2px solid var(--violet);border-radius:var(--radius);
  background:linear-gradient(180deg,rgba(23,30,66,.92),rgba(11,18,48,.78));
  box-shadow:0 20px 44px -30px rgba(0,0,0,.95);
  transition:transform 200ms ease,border-color 200ms ease,box-shadow 200ms ease;
}
.panel--lift:hover{transform:translateY(-4px);border-color:var(--cyan);box-shadow:0 26px 50px -28px rgba(37,244,224,.4)}
.panel__label{
  position:absolute;top:-11px;left:16px;padding:0 8px;background:var(--ink);
  font-size:var(--fs-label);letter-spacing:.18em;color:var(--cyan);
}
.panel__title{margin:0 0 10px;font-size:var(--fs-lead);font-weight:900}
.panel__meta{margin:0;font-size:var(--fs-note);color:var(--mist)}

.stat{display:flex;flex-direction:column;gap:6px}
.stat__value{
  font-family:var(--font-num);font-weight:700;font-variant-numeric:tabular-nums;
  font-size:clamp(40px,6vw,64px);line-height:1;letter-spacing:-.02em;color:var(--cyan);
}
.stat--accent .stat__value{color:var(--orange)}
.stat__label{font-size:var(--fs-label);letter-spacing:.18em;text-transform:uppercase;color:var(--mist)}
.stat__note{font-size:var(--fs-note);color:var(--mist)}
.stat--mega .stat__value{font-size:clamp(72px,16vw,var(--fs-mega))}

/* ---------- 图像容器（页面阶段放置占位图） ---------- */
.figure{margin:0}
.figure__frame{
  position:relative;overflow:hidden;border:1px solid var(--line);border-radius:var(--radius);
  background:linear-gradient(150deg,var(--indigo),var(--ink));
}
.figure__frame::before{
  content:"";position:absolute;inset:0;pointer-events:none;z-index:1;
  background-image:
    linear-gradient(rgba(136,146,187,.14) 1px,transparent 1px),
    linear-gradient(90deg,rgba(136,146,187,.14) 1px,transparent 1px);
  background-size:40px 40px;
}
.figure__frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;z-index:2;
  background:linear-gradient(200deg,rgba(124,77,255,.32),transparent 56%);
}
.figure__frame img{width:100%;height:100%;object-fit:cover}
.figure--panorama .figure__frame{aspect-ratio:21/9}
.figure--wide .figure__frame{aspect-ratio:16/9}
.figure--square .figure__frame{aspect-ratio:1/1}
.figure--tall .figure__frame{aspect-ratio:3/4}
.figure__caption{margin-top:10px;font-size:var(--fs-note);color:var(--mist)}

/* ---------- 手风琴 ---------- */
.accordion{border-top:1px solid var(--line)}
.accordion__item{border-bottom:1px solid var(--line)}
.accordion__trigger{
  display:flex;align-items:center;gap:16px;width:100%;padding:20px 4px;
  text-align:left;cursor:pointer;color:var(--star);
  transition:color var(--fade) ease,background-color var(--fade) ease;
}
.accordion__trigger:hover{color:var(--cyan);background:rgba(124,77,255,.07)}
.accordion__index{font-family:var(--font-num);font-size:var(--fs-label);letter-spacing:.18em;color:var(--violet);flex:none}
.accordion__q{flex:1 1 auto;font-size:var(--fs-body);font-weight:800;letter-spacing:-.01em}
.accordion__sign{position:relative;flex:none;width:14px;height:14px}
.accordion__sign::before,
.accordion__sign::after{content:"";position:absolute;background:currentColor;transition:transform 200ms ease,opacity 200ms ease}
.accordion__sign::before{left:0;top:6px;width:14px;height:2px}
.accordion__sign::after{left:6px;top:0;width:2px;height:14px}
.accordion__item[data-open] .accordion__sign::after{transform:scaleY(0);opacity:0}
.accordion__panel{padding:0 4px 24px;color:var(--mist);font-size:var(--fs-note);max-width:60em}
.accordion__panel[hidden]{display:none}

/* ---------- 标签页 ---------- */
.tabs__list{display:flex;flex-wrap:wrap;gap:8px;padding-bottom:12px;border-bottom:1px solid var(--line)}
.tabs__tab{
  padding:8px 16px;border:1px solid var(--line);border-radius:var(--radius);cursor:pointer;
  font-size:var(--fs-note);font-weight:700;color:var(--mist);
  transition:color var(--fade) ease,border-color var(--fade) ease,background-color var(--fade) ease;
}
.tabs__tab:hover{color:var(--cyan);border-color:rgba(37,244,224,.6)}
.tabs__tab[aria-selected="true"]{
  color:var(--cyan);border-color:var(--cyan);background:rgba(37,244,224,.08);
}
.tabs__panel{padding:26px 0 0}
.tabs__panel[hidden]{display:none}

/* ---------- 筛选 ---------- */
.filter-bar{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 26px}
.chip{
  padding:7px 14px;border:1px solid var(--line);border-radius:var(--radius);cursor:pointer;
  font-size:var(--fs-label);letter-spacing:.18em;color:var(--mist);
  transition:color var(--fade) ease,border-color var(--fade) ease,background-color var(--fade) ease;
}
.chip:hover{color:var(--cyan);border-color:rgba(37,244,224,.6)}
.chip[aria-pressed="true"]{background:var(--violet);border-color:var(--violet);color:var(--star)}
.is-filtered-out{display:none !important}

/* ---------- 显现与返回顶部 ---------- */
[data-reveal]{opacity:0;transform:translateY(16px);transition:opacity 520ms ease,transform 520ms cubic-bezier(.2,.7,.2,1)}
[data-reveal].is-visible{opacity:1;transform:none}

.to-top{
  display:none;place-items:center;width:46px;height:46px;cursor:pointer;
  border:1px solid rgba(124,77,255,.7);border-radius:var(--radius);
  background:rgba(5,6,14,.88);color:var(--cyan);
  font-family:var(--font-num);font-size:16px;
  transition:transform var(--fade) ease,border-color var(--fade) ease;
}
.to-top[data-visible]{display:grid}
.to-top:hover{transform:translateY(-3px);border-color:var(--cyan)}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;margin-top:96px;
  border-top:1px solid rgba(124,77,255,.45);
  background:linear-gradient(180deg,rgba(11,18,48,.72),rgba(5,6,14,.98));
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;height:3px;width:38%;
  background:linear-gradient(90deg,var(--violet),var(--cyan),rgba(37,244,224,0));
}
.footer-inner{
  display:grid;grid-template-columns:minmax(240px,1.4fr) 2.2fr minmax(220px,1fr);gap:40px;
  max-width:var(--wrap);margin:0 auto;padding:56px 22px 32px;
}
.footer-brand__mark{margin:0 0 8px;font-size:var(--fs-label);letter-spacing:.24em;color:var(--cyan)}
.footer-brand__name{margin:0 0 8px;font-size:var(--fs-lead);font-weight:900;letter-spacing:-.01em;line-height:1.25}
.footer-brand__tagline{margin:0 0 18px;max-width:32em;font-size:var(--fs-note);color:var(--mist)}
.footer-actions{display:flex;flex-wrap:wrap;gap:10px}
.footer-nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px}
.footer-col__title{
  margin:0 0 14px;font-size:var(--fs-label);font-weight:800;
  letter-spacing:.2em;text-transform:uppercase;color:var(--mist);
}
.footer-links{display:flex;flex-direction:column;gap:10px;margin:0}
.footer-link{position:relative;display:inline-block;width:fit-content;font-size:15px;color:var(--star)}
.footer-link::after{
  content:"";position:absolute;left:0;bottom:-2px;width:100%;height:1px;background:var(--cyan);
  transform:scaleX(0);transform-origin:left center;transition:transform 200ms ease;
}
.footer-link:hover{color:var(--cyan)}
.footer-link:hover::after{transform:scaleX(1)}
.footer-contact__list{display:flex;flex-direction:column;gap:14px;margin:0}
.footer-contact__item{margin:0}
.footer-contact__label{display:block;font-size:var(--fs-label);letter-spacing:.18em;color:var(--mist)}
.footer-contact__value{display:block;font-size:var(--fs-note);color:var(--star);word-break:break-word}

.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px 24px;
  max-width:var(--wrap);margin:0 auto;padding:18px 22px 34px;
  border-top:1px solid var(--line);
  font-size:var(--fs-label);letter-spacing:.12em;color:var(--mist);
}
.footer-bottom__meta{display:flex;flex-wrap:wrap;gap:8px 22px}
.footer-copy,.footer-icp,.footer-note{margin:0}
.footer-note{color:rgba(136,146,187,.82)}

/* ---------- 平板 ---------- */
@media (max-width:1080px){
  .star-rail{display:none}
  .footer-inner{grid-template-columns:minmax(220px,1fr) 1.6fr;gap:34px}
  .footer-contact{grid-column:1 / -1}
  .footer-contact__list{flex-direction:row;flex-wrap:wrap;gap:18px 34px}
}
@media (max-width:1024px){
  :root{--header-h:66px}
  .header-grid{grid-template-columns:1fr auto;gap:14px}
  .header-actions{display:none}
  .nav-toggle{display:inline-flex;justify-self:end}
  .site-nav{
    position:fixed;top:calc(var(--header-h) + 10px);left:calc(var(--edge) + 10px);right:calc(var(--edge) + 10px);
    display:block;padding:18px;z-index:70;
    max-height:calc(100vh - var(--header-h) - 40px);overflow:auto;
    border:1px solid rgba(124,77,255,.65);border-radius:var(--radius);
    background:linear-gradient(180deg,rgba(11,18,48,.98),rgba(5,6,14,.98));
    box-shadow:0 30px 60px -30px rgba(0,0,0,.95);
    opacity:0;visibility:hidden;transform:translateY(-10px);
    transition:opacity var(--fade) ease,transform var(--fade) ease,visibility var(--fade) ease;
  }
  .site-nav[data-open]{opacity:1;visibility:visible;transform:none}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:2px}
  .site-nav__item{border-bottom:1px solid var(--line)}
  .site-nav__link{display:block;padding:14px 12px;border-left:2px solid transparent;font-size:17px}
  .site-nav__link::after{display:none}
  .site-nav__link[aria-current="page"]{
    background:rgba(124,77,255,.16);border-color:transparent;border-left-color:var(--cyan);color:var(--cyan);
  }
  .site-nav__actions{display:flex;flex-direction:column;gap:10px;margin-top:18px}
  .site-nav__actions .btn{width:100%}
  .grid--3,.grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .span-3,.span-4,.span-5,.span-6,.span-7,.span-8,.span-9{grid-column:span 12}
  .chapter{grid-template-columns:1fr;gap:22px}
}
/* ---------- 手机 ---------- */
@media (max-width:640px){
  :root{--edge:8px;--header-h:62px}
  body{font-size:16px;line-height:1.85}
  .header-grid{padding:0 14px}
  .brand__statement{display:none}
  .container{padding:0 16px}
  .section{padding:52px 0}
  .grid,.grid--2,.grid--3,.grid--4{grid-template-columns:1fr;gap:18px}
  .grid--auto{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr;gap:30px;padding:44px 16px 26px}
  .footer-nav{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
  .footer-contact__list{flex-direction:column;gap:14px}
  .footer-bottom{padding:16px 16px 30px}
  .btn{padding:11px 16px}
}
/* ---------- 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  [data-reveal]{opacity:1;transform:none}
  .btn:hover,.panel--lift:hover,.to-top:hover{transform:none}
}