/* =========================================================
   忆博电竞主站 · /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 头部 / 页脚 / 基础组件
   ========================================================= */

/* ---------- 1. 变量 ---------- */
:root{
  --ink:#07070C;
  --panel:#111219;
  --panel-deep:#0C0D13;
  --line:#23243A;
  --violet:#7C4DFF;
  --cyan:#00E5C7;
  --orange:#FF7A1A;
  --red:#FF3D71;
  --green:#4ADE80;
  --text:#E8E8F2;
  --muted:#9A9AB5;
  --violet-wash:#1A1430;

  --wrap:1240px;
  --gap:24px;
  --ease:cubic-bezier(.22,.71,.24,1);

  --sans:"HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  background-color:var(--ink);
  background-image:
    radial-gradient(900px 480px at 12% -10%,rgba(124,77,255,.22),transparent 62%),
    radial-gradient(760px 420px at 92% 2%,rgba(0,229,199,.11),transparent 60%);
  background-repeat:no-repeat;
}
body{
  margin:0;
  min-height:100vh;
  background:transparent;
  color:var(--text);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
img,video,canvas,svg{display:block;max-width:100%;height:auto}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
table{border-collapse:collapse;width:100%}
hr{border:0;border-top:1px solid var(--line);margin:32px 0}
::selection{background:rgba(124,77,255,.55);color:#fff}

/* 32px 精密网格底纹（固定层，不参与滚动） */
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    linear-gradient(to right,rgba(35,36,58,.62) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(35,36,58,.62) 1px,transparent 1px);
  background-size:32px 32px;
  opacity:.7;
  -webkit-mask-image:radial-gradient(125% 95% at 50% 0,#000 18%,rgba(0,0,0,.35) 68%,transparent 100%);
  mask-image:radial-gradient(125% 95% at 50% 0,#000 18%,rgba(0,0,0,.35) 68%,transparent 100%);
}

/* ---------- 3. 中文排版 ---------- */
h1,h2,h3,h4,h5{margin:0 0 .6em;font-weight:900;line-height:1.16;letter-spacing:.02em;color:var(--text)}
h1{font-size:clamp(40px,6vw,72px)}
h2{font-size:clamp(26px,3.4vw,36px)}
h3{font-size:20px}
h4{font-size:17px;letter-spacing:.04em}
p{margin:0 0 1.1em}
strong{font-weight:800;color:#fff}
small{font-size:13px;color:var(--muted)}
a{color:inherit;text-decoration:none;transition:color .18s var(--ease)}
a:hover{color:var(--cyan)}

.tilt{display:inline-block;transform:skewX(-4deg);transform-origin:left bottom}
.mono,.data-mono{font-family:var(--mono);letter-spacing:.02em}
.data-big{font-family:var(--mono);font-weight:700;font-size:clamp(30px,4vw,46px);line-height:1;color:var(--cyan)}
.eyebrow{
  display:inline-block;
  margin:0 0 12px;
  font-family:var(--mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--cyan);
}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ---------- 4. 焦点环 ---------- */
a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible,
input:focus-visible,
summary:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
}

/* ---------- 5. 跳转链接 ---------- */
.skip-link{
  position:fixed;
  left:16px;
  top:-90px;
  z-index:300;
  padding:10px 18px;
  background:var(--cyan);
  color:#04120F;
  font-size:14px;
  font-weight:800;
  letter-spacing:.04em;
  transition:top .18s var(--ease);
}
.skip-link:focus{top:16px;color:#04120F}

/* ---------- 6. 布局容器 ---------- */
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 20px}
.site-main{position:relative;z-index:1;padding-top:118px}
#main-content{scroll-margin-top:112px}
.section{position:relative;z-index:1;padding:64px 0}
.section--tight{padding:36px 0}
.section__head{margin-bottom:28px}
.section__head .eyebrow{margin-bottom:8px}

/* ---------- 7. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 18px;
  border:1px solid transparent;
  border-radius:999px;
  font-size:14px;
  font-weight:700;
  letter-spacing:.02em;
  line-height:1;
  white-space:nowrap;
  transition:transform .16s var(--ease),background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease);
}
.btn--primary{background:var(--orange);color:#140802;box-shadow:0 0 22px rgba(255,122,26,.32)}
.btn--primary:hover{background:#FF9247;color:#140802;transform:translateY(-1px)}
.btn--ghost{border-color:var(--line);background:rgba(35,36,58,.42);color:var(--text)}
.btn--ghost:hover{border-color:var(--violet);background:rgba(124,77,255,.16);color:#fff}
.btn--cyan{background:var(--cyan);color:#04211C}
.btn--cyan:hover{background:#5CFFE3;color:#04211C;transform:translateY(-1px)}
.btn--block{width:100%}

/* ---------- 8. 标签与筛选 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 9px;
  border:1px solid var(--line);
  background:rgba(35,36,58,.42);
  font-family:var(--mono);
  font-size:11px;
  font-weight:700;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--muted);
  line-height:1.4;
}
.tag--live{color:var(--orange);border-color:rgba(255,122,26,.5);background:rgba(255,122,26,.12)}
.tag--cyan{color:var(--cyan);border-color:rgba(0,229,199,.45);background:rgba(0,229,199,.1)}
.tag--violet{color:#C7B3FF;border-color:rgba(124,77,255,.55);background:rgba(124,77,255,.16)}
.tag--green{color:var(--green);border-color:rgba(74,222,128,.45);background:rgba(74,222,128,.1)}
.tag--red{color:var(--red);border-color:rgba(255,61,113,.5);background:rgba(255,61,113,.12)}

.chip-row{display:flex;flex-wrap:wrap;gap:8px}
.chip{
  padding:7px 14px;
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(17,18,25,.72);
  color:var(--muted);
  font-size:13px;
  font-weight:600;
  letter-spacing:.02em;
  transition:color .18s var(--ease),border-color .18s var(--ease),background .18s var(--ease);
}
.chip:hover{color:var(--text);border-color:var(--violet)}
.chip[aria-pressed="true"],
.chip.is-active{color:#fff;background:rgba(124,77,255,.3);border-color:var(--violet)}

/* ---------- 9. 堆叠面板 ---------- */
.panel{
  position:relative;
  z-index:1;
  display:block;
  padding:30px 28px 28px;
  margin:0 0 var(--gap);
  background:var(--panel);
  border:1px solid var(--line);
  transition:border-color .22s var(--ease),background .22s var(--ease);
}
.panel:hover{border-color:rgba(124,77,255,.45)}
.panel--violet{background:var(--violet-wash);border-color:rgba(124,77,255,.42)}
.panel--flush{padding:0}
.panel--wide{width:100%}
.panel__index{
  position:absolute;
  top:-1px;
  left:-1px;
  padding:5px 10px 4px;
  background:var(--violet);
  color:#fff;
  font-family:var(--mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.12em;
  line-height:1;
}
.panel__title{margin:0 0 .5em;font-size:clamp(24px,3vw,32px);font-weight:900}
.panel__title .tilt{display:inline-block;transform:skewX(-4deg)}
.panel__lead{margin:0 0 18px;color:var(--muted);max-width:68ch}
.panel__foot{margin-top:20px;padding-top:18px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:12px;align-items:center}

/* ---------- 10. 网格 ---------- */
.grid{display:grid;gap:var(--gap)}
.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--split{grid-template-columns:minmax(0,1.45fr) minmax(0,1fr)}
.grid--split-rev{grid-template-columns:minmax(0,1fr) minmax(0,1.45fr)}
.layout-with-aside{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:32px;align-items:start}

/* ---------- 11. 图片容器 ---------- */
.media-frame{
  position:relative;
  display:block;
  width:100%;
  overflow:hidden;
  border:1px solid var(--line);
  background:linear-gradient(140deg,#141527,#0A0B12);
  aspect-ratio:16 / 9;
}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--tall{aspect-ratio:3 / 4}
.media-frame--square{aspect-ratio:1 / 1}
.media-frame > img,
.media-frame > video{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(180deg,rgba(7,7,12,0) 42%,rgba(7,7,12,.8) 100%);
}
.media-frame--placeholder::before{
  content:attr(data-label);
  position:absolute;
  inset:0;
  display:grid;
  place-items:center;
  padding:16px;
  text-align:center;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--muted);
}

/* ---------- 12. 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:0;
  padding:14px 0 6px;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--muted);
}
.breadcrumb li{display:flex;align-items:center}
.breadcrumb li::after{content:"/";margin:0 9px;color:#3A3B52}
.breadcrumb li:last-child::after{content:"";margin:0}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--cyan)}

/* ---------- 13. 正文 ---------- */
.prose{max-width:72ch;font-size:17px;line-height:1.75;color:var(--text)}
.prose h2{margin-top:1.5em;font-size:clamp(24px,2.6vw,30px)}
.prose h3{margin-top:1.3em}
.prose ul,.prose ol{margin:0 0 1.2em;padding-left:0}
.prose li{position:relative;padding-left:20px;margin-bottom:.5em}
.prose li::before{content:"";position:absolute;left:2px;top:.72em;width:6px;height:6px;background:var(--cyan);transform:rotate(45deg)}
.prose a{color:var(--cyan);border-bottom:1px solid rgba(0,229,199,.35)}
.prose a:hover{color:#7FFFF0;border-bottom-color:#7FFFF0}
.prose code{font-family:var(--mono);font-size:.92em;padding:2px 6px;background:rgba(35,36,58,.75);color:var(--cyan)}
.prose blockquote{margin:1.4em 0;padding:4px 0 4px 18px;border-left:2px solid var(--violet);color:var(--muted)}

/* ---------- 14. 折叠面板 ---------- */
.accordion{border:1px solid var(--line);background:var(--panel)}
.accordion__item + .accordion__item{border-top:1px solid var(--line)}
.accordion__trigger{
  display:flex;
  width:100%;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:18px 20px;
  text-align:left;
  font-size:16px;
  font-weight:700;
  letter-spacing:.01em;
  transition:background .18s var(--ease),color .18s var(--ease);
}
.accordion__trigger:hover{background:rgba(124,77,255,.09);color:#fff}
.accordion__icon{font-family:var(--mono);font-size:18px;color:var(--cyan);line-height:1;transition:transform .22s var(--ease)}
.accordion__trigger[aria-expanded="true"] .accordion__icon{transform:rotate(45deg)}
.accordion__panel{padding:0 20px 20px;color:var(--muted);font-size:16px}
.accordion__panel[hidden]{display:none}

/* ---------- 15. 横向轨道 ---------- */
.rail{
  display:flex;
  gap:16px;
  overflow-x:auto;
  padding:4px 0 18px;
  scroll-snap-type:x mandatory;
  overscroll-behavior-x:contain;
  scrollbar-color:var(--line) transparent;
  scrollbar-width:thin;
}
.rail > *{flex:0 0 clamp(240px,26vw,320px);scroll-snap-align:start}
.rail::-webkit-scrollbar{height:6px}
.rail::-webkit-scrollbar-track{background:transparent}
.rail::-webkit-scrollbar-thumb{background:var(--line)}
.rail--wide > *{flex-basis:clamp(280px,34vw,420px)}

/* ---------- 16. 显现 ---------- */
.js-reveal [data-reveal]{
  opacity:0;
  transform:translateY(24px);
  transition:opacity .32s var(--ease),transform .32s var(--ease);
}
.js-reveal [data-reveal].is-revealed{opacity:1;transform:none}

/* ---------- 17. 头部 ---------- */
.site-header{
  position:fixed;
  top:0;
  left:0;
  right:0;
  z-index:120;
  padding:14px 20px;
  transition:padding .26s var(--ease);
}
.site-header[data-condensed="true"]{padding:8px 20px}

.header-bar{
  display:flex;
  align-items:center;
  gap:16px;
  width:100%;
  max-width:var(--wrap);
  margin:0 auto;
  padding:10px 12px 10px 16px;
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(17,18,25,.94);
  box-shadow:0 10px 34px rgba(0,0,0,.46);
  transition:background .26s var(--ease),box-shadow .26s var(--ease),border-color .26s var(--ease),padding .26s var(--ease);
}
.site-header[data-condensed="true"] .header-bar{
  background:rgba(11,12,19,.96);
  border-color:rgba(124,77,255,.42);
  box-shadow:0 12px 42px rgba(0,0,0,.6),0 0 0 1px rgba(124,77,255,.16);
}

/* 品牌 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  min-width:0;
}
.brand__glyph{
  display:grid;
  place-items:center;
  width:38px;
  height:38px;
  flex:0 0 38px;
  border-radius:10px;
  background:linear-gradient(140deg,rgba(124,77,255,.95),rgba(0,229,199,.4));
  color:#08080F;
  font-family:var(--mono);
  font-size:19px;
  font-weight:800;
  line-height:1;
  box-shadow:0 0 0 1px rgba(124,77,255,.6) inset;
}
.brand__text{display:flex;flex-direction:column;min-width:0;line-height:1.2}
.brand__name{font-size:17px;font-weight:900;letter-spacing:.05em;color:var(--text)}
.brand__tagline{
  overflow:hidden;
  max-height:18px;
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--muted);
  white-space:nowrap;
  transition:max-height .24s var(--ease),opacity .2s var(--ease);
}
.site-header[data-condensed="true"] .brand__tagline{max-height:0;opacity:0}
.brand:hover .brand__name{color:#fff}

/* 主栏目胶囊 */
.site-nav{flex:1 1 auto;display:flex;justify-content:center;min-width:0}
.site-nav__list{display:flex;align-items:center;gap:4px}
.site-nav__link{
  display:block;
  padding:8px 14px;
  border-radius:999px;
  font-size:14px;
  font-weight:600;
  letter-spacing:.02em;
  color:var(--muted);
  white-space:nowrap;
  transition:color .18s var(--ease),background .18s var(--ease),box-shadow .18s var(--ease);
}
.site-nav__link:hover{color:var(--text);background:rgba(35,36,58,.78)}
.site-nav__link[aria-current="page"]{
  color:#fff;
  background:linear-gradient(135deg,rgba(124,77,255,.92),rgba(124,77,255,.42));
  box-shadow:0 0 0 1px rgba(124,77,255,.75) inset,0 0 20px rgba(124,77,255,.34);
}

/* 头部行动区 */
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;margin-left:auto}

/* 移动端汉堡按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  flex:0 0 auto;
  margin-left:auto;
  padding:8px 14px;
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(35,36,58,.55);
  color:var(--text);
  font-size:13px;
  font-weight:800;
  letter-spacing:.1em;
  transition:border-color .18s var(--ease),background .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--violet);background:rgba(124,77,255,.18)}
.nav-toggle__bars{display:inline-flex;flex-direction:column;gap:3px;width:16px}
.nav-toggle__bars i{display:block;height:2px;border-radius:2px;background:var(--cyan);transition:transform .22s var(--ease),opacity .16s var(--ease)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

/* 滚动进度 */
.scroll-progress{
  position:fixed;
  top:0;
  left:0;
  right:0;
  height:2px;
  z-index:140;
  background:rgba(35,36,58,.55);
  pointer-events:none;
}
.scroll-progress__bar{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--violet),var(--cyan));
  transition:width .1s linear;
}

/* ---------- 18. 页脚 ---------- */
.site-footer{
  position:relative;
  z-index:1;
  margin-top:80px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(17,18,25,.72),rgba(7,7,12,1));
}
.footer-inner{max-width:var(--wrap);margin:0 auto;padding:56px 20px 34px}
.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,minmax(0,1fr));gap:36px 28px}
.footer-brand{min-width:0}
.brand--footer{margin-bottom:16px}
.footer-lead{margin:0;font-size:14px;line-height:1.75;color:var(--muted);max-width:34ch}
.footer-col__title{
  margin:0 0 16px;
  font-family:var(--mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--cyan);
}
.footer-links li{margin:0}
.footer-links a{
  display:inline-block;
  padding:5px 0;
  font-size:14px;
  color:var(--muted);
  transition:color .18s var(--ease),transform .18s var(--ease);
}
.footer-links a::before{content:"›";margin-right:8px;color:#3A3B52;transition:color .18s var(--ease)}
.footer-links a:hover{color:var(--text);transform:translateX(3px)}
.footer-links a:hover::before{color:var(--orange)}

.footer-contact{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:18px 28px;
  margin-top:44px;
  padding-top:26px;
  border-top:1px solid var(--line);
}
.contact-item{min-width:0}
.contact-item__label{
  display:block;
  margin-bottom:6px;
  font-family:var(--mono);
  font-size:11px;
  font-weight:700;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--muted);
}
.contact-item__value{display:block;font-size:15px;line-height:1.6;color:var(--text);word-break:break-word}
.footer-note{margin:22px 0 0;max-width:640px;font-size:13px;line-height:1.7;color:var(--muted)}

.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 22px;
  margin-top:26px;
  padding-top:20px;
  border-top:1px solid var(--line);
}
.footer-legal{display:flex;flex-wrap:wrap;gap:16px}
.footer-legal a{font-size:13px;color:var(--muted)}
.footer-legal a:hover{color:var(--cyan)}
.footer-icp{margin:0;font-family:var(--mono);font-size:12px;letter-spacing:.06em;color:var(--muted)}
.footer-copy{margin:14px 0 0;font-size:13px;color:var(--muted)}

/* 返回顶部 */
.to-top{
  position:fixed;
  right:18px;
  bottom:18px;
  z-index:130;
  display:grid;
  place-items:center;
  width:44px;
  height:44px;
  border:1px solid var(--line);
  border-radius:50%;
  background:rgba(12,13,19,.92);
  color:var(--cyan);
  font-family:var(--mono);
  font-size:18px;
  line-height:1;
  opacity:0;
  visibility:hidden;
  transform:translateY(12px);
  transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s,border-color .2s var(--ease),background .2s var(--ease);
}
.to-top[data-visible="true"]{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{border-color:var(--cyan);background:rgba(0,229,199,.14);color:var(--cyan)}

/* ---------- 19. 桌面毛玻璃（仅桌面启用，避免移动端生成固定定位包含块） ---------- */
@media (min-width:1024px){
  .header-bar{
    background:linear-gradient(120deg,rgba(17,18,25,.9),rgba(12,13,19,.84));
    -webkit-backdrop-filter:blur(16px);
    backdrop-filter:blur(16px);
  }
  .site-header[data-condensed="true"] .header-bar{
    background:rgba(11,12,19,.9);
    -webkit-backdrop-filter:blur(18px);
    backdrop-filter:blur(18px);
  }
}

/* ---------- 20. 响应式 ---------- */
@media (max-width:1180px) and (min-width:1024px){
  .site-nav__list{gap:2px}
  .site-nav__link{padding:8px 10px;font-size:13px}
  .header-actions .btn{padding:10px 14px;font-size:13px}
}

@media (max-width:1023px){
  .site-header{padding:10px 12px}
  .site-header[data-condensed="true"]{padding:8px 12px}

  .header-bar{gap:10px;padding:8px 10px 8px 12px}
  .brand__tagline{display:none}
  .header-actions{display:none}
  .nav-toggle{display:inline-flex}

  .site-nav{
    position:fixed;
    left:12px;
    right:12px;
    bottom:12px;
    z-index:125;
    display:block;
    padding:8px;
    border:1px solid var(--line);
    border-radius:999px;
    background:rgba(10,11,18,.97);
    box-shadow:0 18px 46px rgba(0,0,0,.66),0 0 0 1px rgba(124,77,255,.2);
    overflow-x:auto;
    overscroll-behavior-x:contain;
    transform:translateY(160%);
    opacity:0;
    visibility:hidden;
    transition:transform .28s var(--ease),opacity .24s var(--ease),visibility .28s;
    scrollbar-width:none;
  }
  .site-nav::-webkit-scrollbar{display:none}
  .site-nav[data-open="true"]{transform:translateY(0);opacity:1;visibility:visible}
  .site-nav__list{flex-wrap:nowrap;justify-content:flex-start;gap:6px}
  .site-nav__link{
    padding:9px 14px;
    font-size:14px;
    background:rgba(35,36,58,.5);
  }

  .site-main{padding-top:96px}
  #main-content{scroll-margin-top:92px}
  .to-top{right:14px;bottom:88px}
  .site-footer{padding-bottom:92px}

  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--split,
  .grid--split-rev{grid-template-columns:minmax(0,1fr)}
  .layout-with-aside{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:1.4fr repeat(2,minmax(0,1fr))}
  .footer-contact{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:720px){
  :root{--gap:16px}
  body{font-size:16px}
  h1{font-size:clamp(34px,9vw,46px)}

  .wrap{padding:0 16px}
  .section{padding:44px 0}
  .panel{padding:22px 18px 20px}
  .panel__title{font-size:clamp(22px,6vw,28px)}

  .grid--2,
  .grid--3,
  .grid--4{grid-template-columns:minmax(0,1fr)}

  .footer-inner{padding:40px 16px 26px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px 18px}
  .footer-brand{grid-column:1 / -1}
  .footer-contact{grid-template-columns:minmax(0,1fr);gap:14px}

  .rail > *{flex-basis:78vw}
}

@media (max-width:480px){
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .brand__glyph{width:34px;height:34px;flex-basis:34px;font-size:17px}
  .brand__name{font-size:15px}
  .nav-toggle__label{display:none}
  .footer-bottom{justify-content:flex-start}
}

/* ---------- 21. 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;
    scroll-behavior:auto !important;
  }
  .js-reveal [data-reveal]{opacity:1 !important;transform:none !important}
  .site-nav{transition:none !important}
}