/* ==========================================================================
   幻影体育 · 共享样式表 /assets/site.css
   夜间战术板 × 编辑部索引系统
   ========================================================================== */

/* ---------- 1. 设计变量 ---------- */
:root{
  --ink:#0B1412;
  --lift:#12201C;
  --lift-2:#16261F;
  --ridge:#1E2F2A;
  --parchment:#F2EDE0;
  --mist:#A9B7B0;
  --lime:#C6F24A;
  --lime-deep:#8FBF1F;
  --violet:#7B5CFF;
  --violet-soft:#B9A8FF;
  --ember:#FF6B3D;

  --font-display:"HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:system-ui,-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,monospace;

  --maxw:1240px;
  --gutter:clamp(18px,4vw,48px);
  --radius-lg:28px;
  --radius-md:18px;
  --radius-sm:12px;
  --radius-pill:999px;
  --hairline:1px solid var(--ridge);
  --ease:180ms cubic-bezier(.32,.72,0,1);
}

/* ---------- 2. Reset 与基础 ---------- */
*,*::before,*::after{box-sizing:border-box;}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:132px;
}

body{
  margin:0;
  min-height:100vh;
  background-color:var(--ink);
  background-image:
    radial-gradient(1100px 560px at 88% -8%, rgba(123,92,255,.13), transparent 62%),
    radial-gradient(900px 520px at -6% 2%, rgba(198,242,74,.07), transparent 58%),
    radial-gradient(760px 720px at 50% 112%, rgba(255,107,61,.05), transparent 60%);
  background-repeat:no-repeat;
  color:var(--parchment);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4,h5,h6{margin:0;line-height:1.15;font-weight:800;}
p,figure,blockquote,dl,dd{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
img,svg,video{display:block;max-width:100%;}
a{color:var(--lime);text-decoration:none;}
a:hover{color:var(--lime-deep);}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer;}
summary{cursor:pointer;}
table{border-collapse:collapse;width:100%;}
hr{border:0;border-top:var(--hairline);margin:0;}

:where(a,button,summary,[tabindex]):focus-visible{
  outline:2px solid var(--lime);
  outline-offset:3px;
  border-radius:6px;
}

.skip-link{
  position:fixed;
  top:10px;
  left:10px;
  z-index:300;
  padding:10px 18px;
  border-radius:var(--radius-pill);
  background:var(--lime);
  color:var(--ink);
  font-weight:700;
  font-size:14px;
  transform:translateY(-180%);
  transition:transform var(--ease);
}
.skip-link:focus{transform:none;color:var(--ink);}

/* ---------- 3. 排版 ---------- */
.display-xl{
  font-family:var(--font-display);
  font-weight:800;
  letter-spacing:-.02em;
  font-size:clamp(40px,7vw,64px);
  line-height:1.02;
}
.display-lg{
  font-family:var(--font-display);
  font-weight:800;
  letter-spacing:-.02em;
  font-size:clamp(28px,4.6vw,40px);
  line-height:1.08;
}
.display-md{
  font-family:var(--font-display);
  font-weight:800;
  letter-spacing:-.015em;
  font-size:clamp(19px,2.6vw,26px);
  line-height:1.2;
}

.prose{
  max-width:34em;
  font-size:17px;
  line-height:1.75;
  color:var(--mist);
}
.prose p{margin-bottom:1.1em;}
.prose p:last-child{margin-bottom:0;}
.prose strong{color:var(--parchment);font-weight:700;}
.prose a{border-bottom:1px solid rgba(198,242,74,.4);}

.index-label{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--mist);
  line-height:1.6;
}
.index-label::before{
  content:"";
  width:18px;
  height:1px;
  flex:none;
  background:var(--ember);
}

.tag-mono{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.2em;
  color:var(--parchment);
  font-variant-numeric:tabular-nums;
}
.tag-mono--muted{color:rgba(169,183,176,.6);}

/* ---------- 4. 布局工具 ---------- */
.container{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.container--narrow{max-width:760px;}

.section{padding-block:clamp(40px,6vw,80px);}
.section__head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:14px 28px;
  margin-bottom:clamp(20px,3vw,36px);
}

.grid{display:grid;gap:clamp(16px,2.4vw,28px);}
.grid--12{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));}

/* ---------- 5. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  min-height:46px;
  padding:0 24px;
  border-radius:var(--radius-pill);
  border:1px solid transparent;
  font-family:var(--font-body);
  font-size:14px;
  font-weight:600;
  letter-spacing:.02em;
  line-height:1.2;
  text-decoration:none;
  transition:background-color var(--ease),color var(--ease),border-color var(--ease),transform var(--ease);
}
.btn:active{transform:translateY(1px);}

.btn--lime{background:var(--lime);color:var(--ink);}
.btn--lime:hover{background:var(--lime-deep);color:var(--ink);}

.btn--violet{background:var(--violet);color:#FFFFFF;}
.btn--violet:hover{background:#6A4BF0;color:#FFFFFF;}

.btn--ghost{border-color:rgba(242,237,224,.24);color:var(--parchment);background:transparent;}
.btn--ghost:hover{border-color:var(--lime);color:var(--lime);}

/* ---------- 6. 面包屑 ---------- */
.breadcrumb{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  line-height:1.8;
}
.breadcrumb__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
}
.breadcrumb__item{display:inline-flex;align-items:center;gap:8px;}
.breadcrumb__link{color:var(--mist);}
.breadcrumb__link:hover{color:var(--lime);}
.breadcrumb__item[aria-current="page"]{color:var(--parchment);}
.breadcrumb__sep{color:rgba(169,183,176,.38);}

/* ---------- 7. 横带 ---------- */
.band{
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto;
  align-items:center;
  gap:clamp(12px,2vw,26px);
  padding:clamp(16px,2.4vw,24px) clamp(18px,2.6vw,30px);
  background:var(--lift);
  border:var(--hairline);
  border-radius:var(--radius-lg);
  color:inherit;
  transition:border-color var(--ease),background-color var(--ease),transform var(--ease);
}
.band:hover{
  border-color:rgba(198,242,74,.4);
  background:var(--lift-2);
  color:inherit;
  transform:translateY(-2px);
}
.band__index{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  color:var(--lime);
  font-variant-numeric:tabular-nums;
}
.band__title{
  font-family:var(--font-display);
  font-weight:800;
  letter-spacing:-.015em;
  font-size:clamp(18px,2.4vw,26px);
  line-height:1.2;
  color:var(--parchment);
}
.band__action{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--violet-soft);
  white-space:nowrap;
}

/* ---------- 8. 斜切索引卡 ---------- */
.slit-card{
  position:relative;
  overflow:hidden;
  padding:clamp(20px,2.6vw,30px);
  background:var(--lift);
  border:var(--hairline);
  border-radius:var(--radius-md);
}
.slit-card__corner{
  position:absolute;
  top:0;
  left:0;
  width:64px;
  height:64px;
  background:linear-gradient(135deg, rgba(198,242,74,.26), rgba(198,242,74,0) 62%);
  clip-path:polygon(0 0, 100% 0, 0 100%);
  pointer-events:none;
}
.slit-card__corner--ember{
  background:linear-gradient(135deg, rgba(255,107,61,.34), rgba(255,107,61,0) 62%);
}

/* ---------- 9. 对照轴 ---------- */
.axis{
  display:grid;
  gap:2px;
  border-left:2px solid var(--ridge);
}
.axis__row{
  display:grid;
  grid-template-columns:minmax(0,1fr) auto;
  align-items:center;
  gap:14px;
  padding:12px 16px;
  border-bottom:1px solid rgba(30,47,42,.9);
  transition:background-color var(--ease);
}
.axis__row:hover{background:rgba(30,47,42,.45);}
.axis__name{font-size:14px;color:var(--parchment);line-height:1.4;}
.axis__value{
  font-family:var(--font-mono);
  font-size:16px;
  font-variant-numeric:tabular-nums;
  color:var(--lime);
  letter-spacing:.02em;
}

/* ---------- 10. 旁注 ---------- */
.note{
  border-left:2px solid var(--ember);
  padding-left:14px;
  max-width:34em;
  font-size:13.5px;
  line-height:1.7;
  color:var(--mist);
}
.note strong{color:var(--parchment);}

/* ---------- 11. 图片容器基础规则 ---------- */
.figure{margin:0;}
.media{
  --media-ratio:16 / 9;
  position:relative;
  overflow:hidden;
  aspect-ratio:var(--media-ratio);
  border:var(--hairline);
  border-radius:var(--radius-lg);
  background-color:var(--lift);
  background-image:
    radial-gradient(120% 100% at 82% 0%, rgba(123,92,255,.26), transparent 62%),
    radial-gradient(90% 82% at 8% 100%, rgba(198,242,74,.16), transparent 58%);
}
.media::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:repeating-linear-gradient(90deg, rgba(30,47,42,.9) 0 1px, transparent 1px 48px);
  opacity:.55;
  pointer-events:none;
}
.media > img,
.media > svg,
.media > video{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media--wide{--media-ratio:21 / 9;}
.media--portrait{--media-ratio:3 / 4;}
.media--square{--media-ratio:1 / 1;}
.media__caption{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  line-height:1.7;
  color:var(--mist);
}

/* ---------- 12. 页头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(11,20,18,.9);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:var(--hairline);
}

.progress{
  position:absolute;
  left:0;
  bottom:-1px;
  width:0;
  height:2px;
  background:linear-gradient(90deg,var(--lime),var(--violet-soft));
  transition:width 100ms linear;
  pointer-events:none;
}

.masthead{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.masthead__row{
  display:grid;
  grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);
  align-items:center;
  gap:16px;
  padding-block:14px 12px;
}

.masthead__meta{
  display:flex;
  align-items:center;
  gap:10px;
  min-width:0;
}
.masthead__meta .tag-mono + .tag-mono{
  padding-left:10px;
  border-left:1px solid var(--ridge);
}

.masthead__brand{
  display:inline-flex;
  align-items:center;
  gap:.42em;
  justify-self:center;
  font-family:var(--font-display);
  font-weight:800;
  letter-spacing:-.02em;
  font-size:clamp(20px,2.6vw,30px);
  line-height:1;
  color:var(--parchment);
  white-space:nowrap;
}
.masthead__brand:hover{color:var(--parchment);}
.masthead__glyph{
  width:9px;
  height:1em;
  flex:none;
  border-radius:2px;
  background:linear-gradient(180deg,var(--lime) 0 55%,var(--violet) 55% 100%);
}

.masthead__actions{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:12px;
  min-width:0;
}

.masthead__seal{
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-size:11px;
  letter-spacing:.12em;
  color:var(--mist);
  white-space:nowrap;
}
.masthead__seal::before{
  content:"";
  width:6px;
  height:6px;
  flex:none;
  border-radius:50%;
  background:var(--lime);
  box-shadow:0 0 0 3px rgba(198,242,74,.14);
}

.channel-link{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:7px 13px;
  border-radius:var(--radius-pill);
  border:1px solid rgba(123,92,255,.45);
  background:rgba(123,92,255,.12);
  color:var(--violet-soft);
  font-size:12px;
  letter-spacing:.06em;
  line-height:1.4;
  white-space:nowrap;
  transition:border-color var(--ease),background-color var(--ease),color var(--ease);
}
.channel-link:hover{
  border-color:var(--violet);
  background:rgba(123,92,255,.22);
  color:#FFFFFF;
}
.channel-link__arrow{font-family:var(--font-mono);font-size:12px;}

.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  min-height:40px;
  padding:0 14px;
  border-radius:var(--radius-pill);
  border:1px solid rgba(198,242,74,.35);
  background:rgba(198,242,74,.08);
  color:var(--lime);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  line-height:1;
  transition:border-color var(--ease),background-color var(--ease);
}
.nav-toggle:hover{border-color:var(--lime);background:rgba(198,242,74,.16);}
.nav-toggle__bars{
  display:grid;
  gap:3px;
  width:16px;
  flex:none;
}
.nav-toggle__bars span{
  display:block;
  height:1.5px;
  border-radius:2px;
  background:currentColor;
  transition:transform var(--ease),opacity var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(4.5px) 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(-4.5px) rotate(-45deg);}
.nav-toggle__text{white-space:nowrap;}

.index-nav{
  border-top:1px dashed var(--ridge);
  padding-block:9px 11px;
}

.index-nav__filters{display:none;}

.index-nav__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:center;
  gap:4px 4px;
}

.index-nav__item{flex:0 0 auto;transition:opacity var(--ease);}

.index-nav__link{
  position:relative;
  display:inline-flex;
  align-items:baseline;
  gap:8px;
  padding:8px 14px 10px;
  border-radius:var(--radius-pill);
  border:1px solid transparent;
  color:var(--mist);
  font-size:14px;
  line-height:1.3;
  white-space:nowrap;
  transition:color var(--ease),background-color var(--ease),border-color var(--ease);
}
.index-nav__link:hover{color:var(--parchment);background:rgba(30,47,42,.7);}

.index-nav__num{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.16em;
  font-variant-numeric:tabular-nums;
  color:var(--mist);
  opacity:.55;
  transition:color var(--ease),opacity var(--ease);
}

.index-nav__link[aria-current="page"]{
  color:var(--lime);
  background:rgba(198,242,74,.08);
  border-color:rgba(198,242,74,.26);
}
.index-nav__link[aria-current="page"] .index-nav__num{color:var(--lime);opacity:1;}
.index-nav__link[aria-current="page"]::after{
  content:"";
  position:absolute;
  left:14px;
  right:14px;
  bottom:5px;
  height:1px;
  background:var(--lime);
  opacity:.6;
}

.index-nav[data-filter] .index-nav__item{opacity:.34;}
.index-nav[data-filter="brand"] .index-nav__item[data-group="brand"],
.index-nav[data-filter="product"] .index-nav__item[data-group="product"],
.index-nav[data-filter="help"] .index-nav__item[data-group="help"]{opacity:1;}

/* ---------- 13. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(56px,9vw,120px);
  background:var(--lift);
  border-top:var(--hairline);
  color:var(--mist);
}

.footer-ridge{
  width:100%;
  height:clamp(30px,4vw,54px);
  color:var(--ridge);
}
.footer-ridge svg{width:100%;height:100%;}

.footer-inner{
  position:relative;
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding:0 var(--gutter) clamp(28px,4vw,44px);
}

.footer-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:16px 32px;
  padding-bottom:clamp(20px,3vw,32px);
  border-bottom:var(--hairline);
}

.footer-brand__name{
  display:inline-block;
  font-family:var(--font-display);
  font-weight:800;
  letter-spacing:-.02em;
  font-size:clamp(24px,3.4vw,38px);
  line-height:1;
  color:var(--parchment);
}
.footer-brand__name:hover{color:var(--lime);}
.footer-brand__tag{
  margin-top:10px;
  font-size:13px;
  letter-spacing:.04em;
  line-height:1.6;
  color:var(--mist);
}

.footer-head__marks{
  display:flex;
  align-items:center;
  gap:10px;
}
.footer-seal{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:5px 11px;
  border-radius:var(--radius-pill);
  border:1px solid rgba(198,242,74,.3);
  background:rgba(198,242,74,.07);
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.16em;
  color:var(--lime);
  line-height:1.6;
}
.footer-brand__ember{
  display:inline-block;
  padding:5px 11px;
  border-radius:var(--radius-pill);
  border:1px solid rgba(255,107,61,.42);
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.22em;
  color:var(--ember);
  line-height:1.6;
}

.footer-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:clamp(20px,3vw,40px);
  padding-block:clamp(24px,3.5vw,40px);
}

.footer-col{min-width:0;}
.footer-col__title{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  padding:6px 0 12px;
  list-style:none;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  line-height:1.5;
  color:var(--parchment);
  border-bottom:1px dashed rgba(30,47,42,.95);
  margin-bottom:14px;
  transition:color var(--ease);
}
.footer-col__title::-webkit-details-marker{display:none;}
.footer-col__title::after{
  content:"+";
  font-family:var(--font-mono);
  font-size:14px;
  line-height:1;
  color:var(--lime);
  transition:color var(--ease);
}
.footer-col[open] > .footer-col__title::after{content:"–";}
.footer-col__title:hover{color:var(--lime);}

.footer-col__list{display:grid;gap:8px;}
.footer-col__link{
  display:inline-block;
  padding:2px 0;
  font-size:14px;
  line-height:1.55;
  color:var(--mist);
  border-bottom:1px solid transparent;
  transition:color var(--ease),border-color var(--ease);
}
.footer-col__link:hover{
  color:var(--lime);
  border-bottom-color:rgba(198,242,74,.45);
}
.footer-col__text{
  font-size:12.5px;
  line-height:1.65;
  color:rgba(169,183,176,.72);
  font-variant-numeric:tabular-nums;
}

.footer-meta{display:grid;gap:12px;}
.footer-meta__item{display:grid;gap:2px;min-width:0;}
.footer-meta__label{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.18em;
  color:rgba(169,183,176,.55);
  line-height:1.6;
}
.footer-meta__value{
  font-size:13.5px;
  line-height:1.7;
  color:var(--mist);
  overflow-wrap:anywhere;
}

.footer-legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  padding-top:18px;
  border-top:var(--hairline);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.06em;
  line-height:1.8;
  color:rgba(169,183,176,.7);
  font-variant-numeric:tabular-nums;
}
.footer-legal__icp{color:var(--mist);}

.footer-corner{
  position:absolute;
  right:calc(var(--gutter) + 2px);
  bottom:16px;
  width:10px;
  height:10px;
  border-radius:2px;
  background:var(--ember);
  opacity:.85;
  transform:rotate(45deg);
  pointer-events:none;
}

/* ---------- 14. 响应式 ---------- */
@media (max-width:1080px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr));}
}

@media (max-width:900px){
  html{scroll-padding-top:96px;}

  .masthead__row{
    grid-template-columns:minmax(0,1fr) auto;
    padding-block:12px;
  }
  .masthead__meta{display:none;}
  .masthead__brand{justify-self:start;font-size:clamp(19px,4.6vw,24px);}
  .masthead__actions{gap:8px;}
  .masthead__seal,
  .channel-link{display:none;}
  .nav-toggle{display:inline-flex;}

  .index-nav{
    display:none;
    margin-top:2px;
    padding-block:12px 14px;
  }
  .index-nav[data-open]{
    display:block;
    animation:navDrop 240ms cubic-bezier(.32,.72,0,1) both;
  }

  .index-nav__filters{
    display:flex;
    flex-wrap:nowrap;
    gap:8px;
    overflow-x:auto;
    padding-bottom:10px;
    margin-bottom:10px;
    border-bottom:1px dashed rgba(30,47,42,.95);
    scrollbar-width:none;
  }
  .index-nav__filters::-webkit-scrollbar{display:none;}

  .index-filter{
    flex:0 0 auto;
    padding:7px 13px;
    border-radius:var(--radius-pill);
    border:1px solid rgba(169,183,176,.22);
    background:transparent;
    color:var(--mist);
    font-family:var(--font-mono);
    font-size:10px;
    letter-spacing:.16em;
    line-height:1.5;
    transition:border-color var(--ease),color var(--ease),background-color var(--ease);
  }
  .index-filter:hover{color:var(--parchment);border-color:rgba(242,237,224,.35);}
  .index-filter[aria-pressed="true"]{
    color:var(--ink);
    background:var(--lime);
    border-color:var(--lime);
  }

  .index-nav__list{
    flex-wrap:nowrap;
    justify-content:flex-start;
    gap:6px;
    overflow-x:auto;
    padding-bottom:8px;
    scrollbar-width:thin;
    -webkit-overflow-scrolling:touch;
    -webkit-mask-image:linear-gradient(90deg, transparent 0, #000 14px, #000 calc(100% - 14px), transparent 100%);
    mask-image:linear-gradient(90deg, transparent 0, #000 14px, #000 calc(100% - 14px), transparent 100%);
  }
  .index-nav__list::-webkit-scrollbar{height:3px;}
  .index-nav__list::-webkit-scrollbar-thumb{
    background:rgba(198,242,74,.32);
    border-radius:3px;
  }

  .band{grid-template-columns:auto minmax(0,1fr);}
  .band__action{grid-column:1 / -1;justify-self:start;}
}

@keyframes navDrop{
  from{opacity:0;transform:translateY(-6px);}
  to{opacity:1;transform:none;}
}

@media (max-width:720px){
  .grid--12,
  .grid--3,
  .grid--2{grid-template-columns:repeat(6,minmax(0,1fr));}
  .grid--12 > *,
  .grid--3 > *,
  .grid--2 > *{grid-column:1 / -1;}
  .section__head{flex-direction:column;align-items:flex-start;gap:10px;}
  .footer-head{flex-direction:column;align-items:flex-start;}
}

@media (max-width:600px){
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:18px;}
  .footer-legal{flex-direction:column;align-items:flex-start;gap:6px;}
  .footer-corner{right:var(--gutter);bottom:auto;top:8px;}
  .grid--4{grid-template-columns:minmax(0,1fr);}
  .prose{font-size:16px;}
  .btn{width:100%;}
}

/* ---------- 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;
  }
  .index-nav[data-open]{animation:none;}
}