/* ============================================================
   红牛娱乐 · 共享样式 /assets/site.css
   骨架：技术蓝图网格 + 侧边轨道导航 + 粗野主义卡片
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root{
  --rb-red:#C8102E;
  --rb-red-deep:#7C0A1E;
  --rb-ink:#14161A;
  --rb-slate:#23262B;
  --rb-line:#3A4046;
  --rb-paper:#F4F1EA;
  --rb-linen:#E3DFD4;
  --rb-clay:#B96A3C;
  --rb-eblue:#1F6FEB;
  --rb-silver:#9AA3AB;
  --rb-moss:#47694F;

  --bar-h:68px;
  --rail-w:84px;
  --maxw:1240px;

  --font-sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;

  --ease:cubic-bezier(.2,.7,.3,1);
  --shadow-hard:6px 6px 0 rgba(20,22,26,.9);
  --shadow-soft:0 14px 34px rgba(20,22,26,.16);
}

/* ---------- 2. Reset 与基础 ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}
body{
  margin:0;
  padding-top:var(--bar-h);
  min-height:100vh;
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.75;
  letter-spacing:.005em;
  color:var(--rb-ink);
  background-color:var(--rb-paper);
  background-image:
    linear-gradient(to right, rgba(58,64,70,.10) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(58,64,70,.10) 1px, transparent 1px);
  background-size:72px 72px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg,video{display:block;max-width:100%;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
p{margin:0 0 1em;}
figure{margin:0;}
a{color:inherit;}
h1,h2,h3,h4,h5{margin:0 0 .5em;}
[id]{scroll-margin-top:calc(var(--bar-h) + 18px);}
:focus-visible{
  outline:2px solid var(--rb-eblue);
  outline-offset:3px;
  border-radius:2px;
}

/* ---------- 3. 排版 ---------- */
h1,h2,h3,h4{
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.14;
}
h1{font-size:clamp(2.1rem,5.2vw,3.8rem);}
h2{font-size:clamp(1.5rem,3vw,2.3rem);}
h3{font-size:clamp(1.15rem,1.8vw,1.5rem);}
h4{font-size:1.05rem;letter-spacing:0;}
.lead{
  font-size:clamp(1.02rem,1.4vw,1.16rem);
  line-height:1.85;
  color:#2B2F34;
  max-width:68ch;
}
.mono,.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum" 1;
  letter-spacing:.01em;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:.55rem;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.28em;
  color:var(--rb-clay);
  text-transform:uppercase;
  margin:0 0 .7rem;
}
.eyebrow::before{
  content:"";
  display:block;
  width:22px;
  height:2px;
  background:var(--rb-red);
}
.side-note{
  writing-mode:vertical-rl;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.3em;
  color:var(--rb-silver);
  margin:0;
}
.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. 布局容器 ---------- */
.container{
  width:100%;
  max-width:var(--maxw);
  margin:0 auto;
  padding-inline:clamp(16px,3.4vw,40px);
}
.site-main{
  display:block;
  padding-block:clamp(28px,4.5vw,64px) 0;
}
.rule{
  height:1px;
  border:0;
  background:var(--rb-line);
  opacity:.4;
  margin:clamp(20px,3vw,36px) 0;
}
.slant-band{
  position:relative;
  height:clamp(64px,9vw,120px);
  margin:clamp(28px,4vw,56px) 0;
  background:linear-gradient(100deg,var(--rb-ink) 0%,var(--rb-slate) 55%,var(--rb-red-deep) 100%);
  transform:rotate(-3deg) scaleX(1.05);
  overflow:hidden;
}
.slant-band::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:repeating-linear-gradient(90deg, rgba(244,241,234,.10) 0 1px, transparent 1px 48px);
}

/* ---------- 5. 头部 ---------- */
.skip-link{
  position:fixed;
  top:-120px;
  left:12px;
  z-index:200;
  padding:.7rem 1.1rem;
  background:var(--rb-eblue);
  color:#fff;
  font-size:14px;
  font-weight:700;
  text-decoration:none;
  transition:top .16s var(--ease);
}
.skip-link:focus{top:12px;}

.header-bar{
  position:fixed;
  top:0;
  left:0;
  right:0;
  height:var(--bar-h);
  z-index:120;
  display:flex;
  align-items:center;
  gap:clamp(10px,2vw,22px);
  padding:0 clamp(12px,2.2vw,26px);
  background:linear-gradient(180deg,#1A1D22 0%,#14161A 100%);
  border-bottom:1px solid var(--rb-line);
  transition:box-shadow .18s var(--ease), border-color .18s var(--ease);
}
.header-bar.is-scrolled{
  box-shadow:0 12px 30px rgba(0,0,0,.5);
  border-bottom-color:var(--rb-red);
}

.brand{
  display:flex;
  align-items:center;
  gap:.7rem;
  flex:0 0 auto;
  text-decoration:none;
  color:var(--rb-paper);
}
.brand-mark{
  display:grid;
  place-items:center;
  width:40px;
  height:40px;
  flex:0 0 auto;
  background:linear-gradient(140deg,var(--rb-red) 0%,var(--rb-red-deep) 100%);
  color:#fff;
  font-family:var(--font-mono);
  font-size:15px;
  font-weight:700;
  letter-spacing:.02em;
  border:1px solid rgba(255,255,255,.18);
  box-shadow:3px 3px 0 rgba(0,0,0,.5);
  clip-path:polygon(0 0,100% 0,100% 74%,74% 100%,0 100%);
}
.brand-text{display:block;min-width:0;}
.brand-name{
  display:block;
  font-size:17px;
  font-weight:900;
  letter-spacing:-.01em;
  line-height:1.15;
}
.brand-tag{
  display:block;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.14em;
  line-height:1.5;
  color:var(--rb-silver);
}

.header-tools{
  display:flex;
  align-items:center;
  gap:.6rem;
  margin-left:auto;
  min-width:0;
}
.tool-search{
  display:none;
  align-items:center;
  gap:.5rem;
  padding:.42rem .8rem;
  border:1px solid var(--rb-line);
  color:var(--rb-silver);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  text-decoration:none;
  white-space:nowrap;
  transition:color .16s var(--ease), border-color .16s var(--ease), background .16s var(--ease);
}
.tool-search:hover,.tool-search:focus-visible{
  color:var(--rb-paper);
  border-color:var(--rb-eblue);
  background:rgba(31,111,235,.12);
}
.tool-search__glyph{color:var(--rb-eblue);font-size:13px;}
.tool-account{
  display:inline-flex;
  align-items:center;
  padding:.5rem .95rem;
  background:linear-gradient(150deg,var(--rb-red) 0%,var(--rb-red-deep) 100%);
  color:#fff;
  font-size:13.5px;
  font-weight:800;
  letter-spacing:.06em;
  text-decoration:none;
  white-space:nowrap;
  border:1px solid rgba(255,255,255,.16);
  box-shadow:3px 3px 0 rgba(0,0,0,.5);
  transition:transform .16s var(--ease), box-shadow .16s var(--ease);
}
.tool-account:hover,.tool-account:focus-visible{
  transform:translate(1px,1px);
  box-shadow:2px 2px 0 rgba(0,0,0,.5);
}

.nav-toggle{
  display:inline-flex;
  align-items:center;
  gap:.55rem;
  padding:.5rem .8rem;
  border:1px solid var(--rb-line);
  background:var(--rb-slate);
  color:var(--rb-paper);
  font-size:12px;
  font-weight:700;
  letter-spacing:.16em;
  transition:border-color .16s var(--ease), background .16s var(--ease);
}
.nav-toggle:hover{border-color:var(--rb-red);background:#2A2E34;}
.nav-toggle__bars{display:inline-flex;flex-direction:column;gap:3px;}
.nav-toggle__bars i{
  display:block;
  width:16px;
  height:2px;
  background:var(--rb-red);
  transition:transform .18s var(--ease), opacity .18s 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);}
.nav-toggle__label{display:inline-block;}

/* ---------- 6. 侧边轨道导航 / 移动抽屉 ---------- */
.site-nav{
  position:fixed;
  top:var(--bar-h);
  left:0;
  bottom:0;
  width:min(84vw,320px);
  z-index:110;
  background:var(--rb-ink);
  border-right:1px solid var(--rb-line);
  overflow-y:auto;
  overscroll-behavior:contain;
  scrollbar-width:thin;
  transform:translateX(-100%);
  visibility:hidden;
  transition:transform .2s var(--ease), visibility 0s linear .2s;
}
.site-nav[data-open]{
  transform:translateX(0);
  visibility:visible;
  box-shadow:14px 0 44px rgba(0,0,0,.55);
  transition:transform .2s var(--ease), visibility 0s;
}
.nav-list{display:flex;flex-direction:column;}
.nav-item{display:flex;min-height:0;}
.nav-link{
  flex:1 1 auto;
  display:flex;
  align-items:center;
  gap:.85rem;
  padding:1rem 1.25rem;
  color:var(--rb-paper);
  text-decoration:none;
  border-bottom:1px solid rgba(58,64,70,.85);
  border-left:3px solid transparent;
  transition:background .16s var(--ease), border-color .16s var(--ease), color .16s var(--ease);
}
.nav-link:hover{
  background:var(--rb-slate);
  border-left-color:var(--rb-red);
}
.nav-link[aria-current="page"]{
  background:var(--rb-slate);
  border-left-color:var(--rb-red);
  color:#fff;
}
.nav-link[aria-current="page"] .nav-index{color:var(--rb-red);}
.nav-index{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--rb-silver);
  font-variant-numeric:tabular-nums;
}
.nav-label{
  font-size:15px;
  font-weight:700;
  letter-spacing:.02em;
}

/* ---------- 7. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(56px,8vw,120px);
  background:var(--rb-ink);
  color:var(--rb-paper);
  border-top:4px solid var(--rb-red);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  opacity:.55;
  background-image:
    linear-gradient(to right, rgba(58,64,70,.6) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(58,64,70,.6) 1px, transparent 1px);
  background-size:72px 72px;
}
.site-footer::after{
  content:"";
  position:absolute;
  right:-6%;
  top:-90px;
  width:62%;
  height:190px;
  pointer-events:none;
  background:linear-gradient(90deg, rgba(200,16,46,0), rgba(200,16,46,.5), rgba(31,111,235,0));
  transform:rotate(-3deg);
  filter:blur(28px);
}
.footer-inner{
  position:relative;
  z-index:1;
  width:100%;
  max-width:var(--maxw);
  margin:0 auto;
  padding:clamp(34px,4.6vw,68px) clamp(16px,3.4vw,40px) 26px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:clamp(24px,4vw,48px);
}
.footer-brand{min-width:0;}
.footer-logo{
  display:inline-flex;
  align-items:center;
  gap:.6rem;
  text-decoration:none;
  color:var(--rb-paper);
}
.footer-logo__mark{
  display:grid;
  place-items:center;
  width:34px;
  height:34px;
  background:linear-gradient(140deg,var(--rb-red) 0%,var(--rb-red-deep) 100%);
  color:#fff;
  font-family:var(--font-mono);
  font-size:13px;
  font-weight:700;
  clip-path:polygon(0 0,100% 0,100% 74%,74% 100%,0 100%);
}
.footer-logo__name{font-size:17px;font-weight:900;letter-spacing:-.01em;}
.footer-note{
  margin:.9rem 0 0;
  max-width:34ch;
  font-size:13.5px;
  line-height:1.8;
  color:var(--rb-silver);
}
.footer-coord{
  margin:.9rem 0 0;
  font-size:11.5px;
  letter-spacing:.2em;
  color:var(--rb-silver);
  opacity:.8;
}
.footer-title{
  position:relative;
  margin:0 0 .9rem;
  padding-bottom:.55rem;
  font-size:12px;
  font-weight:700;
  letter-spacing:.26em;
  color:var(--rb-paper);
  border-bottom:1px solid rgba(154,163,171,.3);
}
.footer-title::after{
  content:"";
  position:absolute;
  left:0;
  bottom:-1px;
  width:36px;
  height:2px;
  background:var(--rb-red);
}
.footer-list{display:block;}
.footer-link{
  display:inline-flex;
  align-items:baseline;
  gap:.55rem;
  padding:.32rem 0;
  font-size:14px;
  color:#C9CECF;
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .16s var(--ease), border-color .16s var(--ease);
}
.footer-link:hover,.footer-link:focus-visible{
  color:#fff;
  border-bottom-color:var(--rb-red);
}
.footer-link__no{font-size:11px;color:var(--rb-clay);}
.copy-line{
  display:flex;
  align-items:center;
  gap:.55rem;
  width:100%;
  margin:0 0 .3rem;
  padding:.45rem .65rem;
  background:rgba(58,64,70,.42);
  border:1px solid rgba(154,163,171,.3);
  color:#D6D9D6;
  font-size:13px;
  line-height:1.6;
  text-align:left;
  word-break:break-word;
  transition:border-color .16s var(--ease), background .16s var(--ease), color .16s var(--ease);
}
.copy-line:hover,.copy-line:focus-visible{
  border-color:var(--rb-eblue);
  color:#fff;
}
.copy-line.is-copied{
  border-color:var(--rb-moss);
  color:#BFD8C4;
}
.copy-line__key{
  flex:0 0 auto;
  font-size:10.5px;
  letter-spacing:.16em;
  color:var(--rb-silver);
}
.copy-line__val{min-width:0;}
.copy-line__hint{
  flex:0 0 auto;
  margin-left:auto;
  font-size:11px;
  letter-spacing:.12em;
  color:var(--rb-eblue);
}
.copy-line.is-copied .copy-line__hint{color:var(--rb-moss);}
.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.55rem 1.4rem;
  margin-top:clamp(28px,4vw,48px);
  padding-top:1rem;
  border-top:1px solid rgba(154,163,171,.3);
  font-size:12.5px;
  color:var(--rb-silver);
}
.footer-legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.5rem;
}
.footer-legal a{
  color:#C9CECF;
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .16s var(--ease), border-color .16s var(--ease);
}
.footer-legal a:hover,.footer-legal a:focus-visible{
  color:#fff;
  border-bottom-color:var(--rb-red);
}
.footer-dot{color:var(--rb-line);}
.footer-icp{
  margin:0;
  font-family:var(--font-mono);
  letter-spacing:.06em;
}
.footer-meta{margin:0 0 0 auto;}

/* ---------- 8. 通用组件 ---------- */
.section-head{
  display:grid;
  grid-template-columns:auto 1fr;
  align-items:end;
  gap:.4rem 1rem;
  padding-bottom:.9rem;
  margin:0 0 clamp(18px,2.6vw,32px);
  border-bottom:2px solid var(--rb-ink);
}
.section-index{
  font-family:var(--font-mono);
  font-size:clamp(28px,4vw,46px);
  font-weight:700;
  line-height:1;
  color:var(--rb-clay);
  font-variant-numeric:tabular-nums;
}
.section-title{margin:0;}
.section-note{
  grid-column:1 / -1;
  margin:0;
  font-size:13.5px;
  line-height:1.75;
  color:var(--rb-line);
}

.panel{
  position:relative;
  background:#fff;
  border:2px solid var(--rb-ink);
  box-shadow:var(--shadow-hard);
  padding:clamp(18px,2.4vw,28px);
  transition:transform .18s var(--ease), box-shadow .18s var(--ease), border-color .18s var(--ease);
}
.panel h2,.panel h3{margin-top:0;}
.panel--dark{
  background:var(--rb-slate);
  border-color:#000;
  color:var(--rb-paper);
}
.panel--dark h2,.panel--dark h3,.panel--dark h4{color:var(--rb-paper);}
.panel--dark p{color:#C9CECF;}
.panel--accent{border-left:6px solid var(--rb-red);}
.panel:hover,.panel:focus-within{
  transform:translateY(-2px);
  box-shadow:8px 10px 0 rgba(20,22,26,.9);
}

.btn{
  display:inline-flex;
  align-items:center;
  gap:.55rem;
  padding:.78rem 1.4rem;
  border:2px solid var(--rb-ink);
  background:var(--rb-paper);
  color:var(--rb-ink);
  font-size:14.5px;
  font-weight:800;
  letter-spacing:.04em;
  text-decoration:none;
  box-shadow:4px 4px 0 var(--rb-ink);
  transition:transform .16s var(--ease), box-shadow .16s var(--ease), background .16s var(--ease), color .16s var(--ease), border-color .16s var(--ease);
}
.btn:hover,.btn:focus-visible{
  transform:translate(2px,2px);
  box-shadow:2px 2px 0 var(--rb-ink);
}
.btn:active{
  transform:translate(4px,4px);
  box-shadow:0 0 0 var(--rb-ink);
}
.btn--primary{
  background:linear-gradient(150deg,var(--rb-red) 0%,var(--rb-red-deep) 100%);
  border-color:var(--rb-red-deep);
  color:#fff;
}
.btn--ghost{
  background:transparent;
  border-color:var(--rb-paper);
  color:var(--rb-paper);
  box-shadow:4px 4px 0 rgba(244,241,234,.35);
}
.btn--ghost:hover,.btn--ghost:focus-visible{
  background:rgba(244,241,234,.1);
  box-shadow:2px 2px 0 rgba(244,241,234,.35);
}

.breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.5rem;
  margin:0 0 1.1rem;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.08em;
  color:var(--rb-silver);
}
.breadcrumbs a{
  color:var(--rb-line);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .16s var(--ease), border-color .16s var(--ease);
}
.breadcrumbs a:hover,.breadcrumbs a:focus-visible{
  color:var(--rb-red);
  border-bottom-color:var(--rb-red);
}
.breadcrumbs [aria-current="page"]{color:var(--rb-ink);}

.table-wrap{
  width:100%;
  overflow-x:auto;
  border:2px solid var(--rb-ink);
  background:#fff;
  box-shadow:var(--shadow-hard);
}
.data-table{
  width:100%;
  min-width:640px;
  border-collapse:collapse;
  font-size:14.5px;
}
.data-table caption{
  padding:.7rem 1rem;
  text-align:left;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.1em;
  color:var(--rb-silver);
  border-bottom:1px solid var(--rb-line);
}
.data-table th,
.data-table td{
  padding:.75rem 1rem;
  text-align:left;
  vertical-align:top;
  border-bottom:1px solid rgba(58,64,70,.28);
}
.data-table thead th{
  background:var(--rb-ink);
  color:var(--rb-paper);
  font-family:var(--font-mono);
  font-size:12.5px;
  font-weight:500;
  letter-spacing:.12em;
  border-bottom:none;
}
.data-table tbody tr:nth-child(even){background:var(--rb-linen);}
.data-table tbody tr:hover{background:#FBEDEF;}
.data-table tfoot td{
  background:var(--rb-linen);
  font-weight:700;
  border-top:2px solid var(--rb-ink);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:.35rem;
  padding:.18rem .55rem;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--rb-line);
  background:rgba(58,64,70,.07);
  border:1px solid currentColor;
}
.tag--red{color:var(--rb-red);background:rgba(200,16,46,.08);}
.tag--blue{color:var(--rb-eblue);background:rgba(31,111,235,.08);}
.tag--moss{color:var(--rb-moss);background:rgba(71,105,79,.1);}
.tag--clay{color:var(--rb-clay);background:rgba(185,106,60,.1);}

.stat-block{
  display:flex;
  flex-direction:column;
  gap:.15rem;
  padding-left:.9rem;
  border-left:3px solid var(--rb-red);
}
.stat-block__value{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:clamp(1.6rem,3.4vw,2.4rem);
  font-weight:700;
  line-height:1.05;
  color:var(--rb-ink);
}
.stat-block__label{
  font-size:12.5px;
  letter-spacing:.14em;
  color:var(--rb-line);
}

.media-frame{
  position:relative;
  width:100%;
  aspect-ratio:16 / 9;
  overflow:hidden;
  border:2px solid var(--rb-ink);
  background:linear-gradient(135deg,#1B1E23 0%,#23262B 46%,#2C1A20 100%);
}
.media-frame--wide{aspect-ratio:21 / 9;}
.media-frame--square{aspect-ratio:1 / 1;}
.media-frame--tall{aspect-ratio:4 / 5;}
.media-frame::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(to right, rgba(244,241,234,.07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(244,241,234,.07) 1px, transparent 1px);
  background-size:32px 32px;
}
.media-frame::after{
  content:"";
  position:absolute;
  left:-30%;
  top:38%;
  width:160%;
  height:24px;
  opacity:.8;
  transform:rotate(-3deg);
  background:linear-gradient(90deg, rgba(200,16,46,0), rgba(200,16,46,.75), rgba(31,111,235,.12));
}
.media-frame > img,
.media-frame > picture{
  position:relative;
  z-index:1;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame__caption{
  position:absolute;
  left:0;right:0;bottom:0;
  z-index:2;
  padding:.7rem .9rem;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.14em;
  color:var(--rb-paper);
  background:linear-gradient(0deg, rgba(20,22,26,.86), rgba(20,22,26,0));
}

/* ---------- 9. 显现与动效 ---------- */
.js [data-reveal]{
  opacity:0;
  transform:translate3d(0,16px,0);
  transition:opacity .5s var(--ease), transform .5s var(--ease);
}
.js [data-reveal].is-visible{
  opacity:1;
  transform:none;
}

/* ---------- 10. 断点 ---------- */
@media (min-width:760px){
  .tool-search{display:inline-flex;}
  .footer-grid{grid-template-columns:1.15fr 1fr 1.2fr;}
}
@media (min-width:1024px){
  body{padding-left:var(--rail-w);}
  .header-bar{left:var(--rail-w);}
  .skip-link{left:calc(var(--rail-w) + 12px);}
  .nav-toggle{display:none;}

  .site-nav{
    width:var(--rail-w);
    transform:none;
    visibility:visible;
    transition:none;
    box-shadow:none;
  }
  .site-nav[data-open]{transform:none;box-shadow:none;}
  .nav-list{height:100%;}
  .nav-link{
    flex:1 1 0;
    min-height:84px;
    flex-direction:row;
    align-items:center;
    justify-content:center;
    gap:.8rem;
    padding:.9rem .35rem;
    writing-mode:vertical-rl;
    border-bottom:none;
    border-left:none;
    border-right:3px solid transparent;
  }
  .nav-link:hover{
    background:var(--rb-slate);
    border-right-color:var(--rb-red);
  }
  .nav-link[aria-current="page"]{
    border-right-color:var(--rb-red);
  }
  .nav-index{letter-spacing:.02em;}
  .nav-label{font-size:14px;letter-spacing:.16em;}
}
@media (max-width:520px){
  .brand-tag{display:none;}
  .footer-meta{margin-left:0;}
}

/* ---------- 11. 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    transition-delay:0ms !important;
  }
  .js [data-reveal]{opacity:1;transform:none;}
  .panel:hover,.panel:focus-within{transform:none;}
  .site-nav{transition:none;}
}