/* ============================================================
   IMTOKEN 钱包 · keyvault-imtoken.com.cn
   共享样式 /assets/site.css
   1 变量 · 2 复位 · 3 基础 · 4 骨架头部 · 5 页脚
   6 版式容器 · 7 通用组件 · 8 动效 · 9 响应式
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root{
  --vault-void:#050A14;
  --abyss-navy:#0A1A2F;
  --ink-slate:#12293F;
  --paper-warm:#F2E8D7;
  --paper-edge:#DCCDB2;
  --ink-black:#12161C;
  --neon-cyan:#33E6D2;
  --amber-gold:#FFB454;
  --mist-gray:#9AB0C6;
  --alert-ember:#FF6A4D;
  --jade-signal:#4CD48A;

  --rail-w:88px;
  --rail-w-open:264px;
  --rail-pad:14px;

  --r-card:26px;
  --r-soft:18px;
  --r-paper:12px;
  --r-pill:999px;

  --ease:cubic-bezier(.2,.8,.2,1);
  --dur:380ms;
  --dur-slow:520ms;

  --gutter:24px;
  --maxw:1280px;
  --hairline:rgba(51,230,210,.16);
  --hairline-strong:rgba(51,230,210,.38);

  --font-display:"Sora","Source Han Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","Sarasa Mono SC","Noto Sans SC","PingFang SC",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

/* ---------- 2. 复位 ---------- */
*,*::before,*::after{box-sizing:border-box;}
body,h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote,dl,dd{margin:0;}
ul,ol{padding:0;list-style:none;}
img,svg,video{display:block;max-width:100%;}
button{font:inherit;color:inherit;background:none;border:0;}
a{color:inherit;text-decoration:none;}
table{border-collapse:collapse;}

/* ---------- 3. 基础 ---------- */
html{
  scroll-behavior:smooth;
  -webkit-text-size-adjust:100%;
  text-size-adjust:100%;
}
body{
  margin:0;
  font-family:var(--font-mono);
  font-size:16px;
  line-height:1.85;
  color:var(--paper-warm);
  background-color:var(--vault-void);
  background-image:
    linear-gradient(rgba(51,230,210,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(51,230,210,.05) 1px,transparent 1px),
    radial-gradient(900px 620px at 92% -8%,rgba(10,26,47,.95),rgba(5,10,20,0) 72%),
    radial-gradient(720px 520px at -6% 108%,rgba(18,41,63,.72),rgba(5,10,20,0) 70%);
  background-size:56px 56px,56px 56px,100% 100%,100% 100%;
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  padding-left:0;
  padding-top:0;
}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.2;
}
h1{font-size:clamp(30px,5vw,64px);}
h2{font-size:clamp(24px,3.4vw,40px);}
h3{font-size:clamp(19px,2.2vw,26px);}
h4{font-size:18px;}
strong{font-weight:700;}
main{display:block;}
#main-content{scroll-margin-top:96px;}

.link,.prose a{
  color:var(--neon-cyan);
  text-decoration:underline;
  text-decoration-thickness:1px;
  text-underline-offset:3px;
}
.link:hover,.prose a:hover{color:var(--amber-gold);}

:focus-visible{
  outline:2px solid var(--neon-cyan);
  outline-offset:3px;
  border-radius:6px;
}

.skip-link{
  position:fixed;
  top:12px;
  left:12px;
  z-index:200;
  transform:translateY(-190%);
  padding:10px 18px;
  border-radius:var(--r-pill);
  background:var(--neon-cyan);
  color:var(--vault-void);
  font-size:14px;
  font-weight:700;
  letter-spacing:.04em;
  transition:transform 220ms var(--ease);
}
.skip-link:focus{transform:translateY(0);}

.muted{color:var(--mist-gray);}
.mono{font-variant-numeric:tabular-nums;}
.stack{display:flex;flex-direction:column;gap:var(--gutter);}
.cluster{display:flex;flex-wrap:wrap;gap:12px;align-items:center;}

/* ---------- 4. 骨架头部 ---------- */
.site-head{
  position:relative;
  z-index:70;
  height:0;
  overflow:visible;
}

/* 轨道 */
.rail{
  position:fixed;
  top:0;
  left:0;
  bottom:0;
  z-index:80;
  width:var(--rail-w);
  display:flex;
  flex-direction:column;
  gap:16px;
  padding:22px var(--rail-pad) 18px;
  background:linear-gradient(180deg,rgba(10,26,47,.97),rgba(5,10,20,.99));
  border-right:1px solid var(--hairline);
  overflow:hidden;
  transition:width var(--dur) var(--ease),transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}

/* 品牌 */
.brand{
  display:flex;
  align-items:center;
  gap:12px;
  min-width:0;
  color:var(--paper-warm);
}
.brand-mark{
  position:relative;
  flex:0 0 auto;
  width:34px;
  height:34px;
  border-radius:50%;
  border:2px solid var(--neon-cyan);
  box-shadow:0 0 0 4px rgba(51,230,210,.08),inset 0 0 14px rgba(51,230,210,.28);
}
.brand-mark::before{
  content:"";
  position:absolute;
  inset:9px;
  border-radius:50%;
  background:var(--amber-gold);
}
.brand-mark::after{
  content:"";
  position:absolute;
  left:50%;
  top:-5px;
  width:12px;
  height:9px;
  transform:translateX(-50%);
  border:2px solid var(--neon-cyan);
  border-bottom:0;
  border-radius:8px 8px 0 0;
}
.brand-text{
  display:flex;
  flex-direction:column;
  line-height:1.28;
  white-space:nowrap;
}
.brand-name{
  font-family:var(--font-display);
  font-weight:800;
  font-size:15px;
  letter-spacing:-.01em;
}
.brand-sub{
  font-size:11px;
  letter-spacing:.16em;
  color:var(--mist-gray);
}
.brand-note{
  font-size:11px;
  line-height:1.7;
  letter-spacing:.06em;
  color:var(--mist-gray);
  white-space:nowrap;
}

/* 轨道内文本的收起/展开（仅作用于 .rail 内） */
.rail .brand-text,
.rail .brand-note{
  opacity:0;
  max-width:0;
  max-height:0;
  overflow:hidden;
  transition:opacity 260ms var(--ease),max-width var(--dur) var(--ease),max-height var(--dur) var(--ease);
}

/* 主导航 */
.rail-nav{
  flex:1 1 auto;
  min-height:0;
  overflow-y:auto;
  overflow-x:hidden;
  scrollbar-width:thin;
  scrollbar-color:rgba(51,230,210,.35) transparent;
}
.rail-nav::-webkit-scrollbar{width:6px;}
.rail-nav::-webkit-scrollbar-thumb{background:rgba(51,230,210,.28);border-radius:999px;}
.rail-list{display:flex;flex-direction:column;gap:6px;}
.rail-link{
  display:flex;
  align-items:center;
  gap:10px;
  min-height:44px;
  padding:10px 12px;
  border-radius:14px;
  color:var(--mist-gray);
  transition:color var(--dur) var(--ease),background var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.rail-link:hover{color:var(--paper-warm);background:rgba(51,230,210,.08);}
.rail-idx{
  flex:0 0 auto;
  font-size:11px;
  letter-spacing:.06em;
  color:rgba(154,176,198,.8);
  font-variant-numeric:tabular-nums;
}
.rail-token{
  flex:0 0 auto;
  font-size:12px;
  letter-spacing:.1em;
}
.rail-label{
  flex:0 0 auto;
  font-size:14px;
  white-space:nowrap;
  opacity:0;
  max-width:0;
  overflow:hidden;
  transition:opacity 260ms var(--ease),max-width var(--dur) var(--ease);
}
.rail-link[aria-current="page"]{
  color:var(--paper-warm);
  background:rgba(51,230,210,.13);
  box-shadow:inset 0 0 0 1px var(--hairline-strong);
}
.rail-link[aria-current="page"] .rail-idx{color:var(--amber-gold);}
.rail-link[aria-current="page"]::after{
  content:"";
  position:absolute;
  width:6px;height:6px;
  border-radius:50%;
  background:var(--amber-gold);
}
.rail-item{position:relative;}

/* 轨道底部 */
.rail-side{
  display:flex;
  flex-direction:column;
  gap:12px;
  padding-top:14px;
  border-top:1px solid var(--hairline);
}
.rail-utility{
  display:flex;
  flex-direction:column;
  gap:6px;
  opacity:0;
  max-height:0;
  overflow:hidden;
  transition:opacity 260ms var(--ease),max-height var(--dur) var(--ease);
}
.rail-utility-item{
  font-size:11px;
  line-height:1.7;
  letter-spacing:.06em;
  color:var(--mist-gray);
  white-space:nowrap;
}
.rail-utility-link{color:var(--neon-cyan);}
.rail-utility-link:hover{color:var(--amber-gold);}
.rail-foot{display:flex;flex-direction:column;gap:6px;}
.rail-foot-link{
  font-size:11px;
  letter-spacing:.08em;
  color:var(--mist-gray);
  white-space:nowrap;
}
.rail-foot-link:hover{color:var(--neon-cyan);}
.rail-icp{
  font-size:10px;
  letter-spacing:.04em;
  color:rgba(154,176,198,.65);
  white-space:nowrap;
  opacity:0;
  max-height:0;
  overflow:hidden;
  transition:opacity 260ms var(--ease),max-height var(--dur) var(--ease);
}

/* 轨道 CTA */
.rail-cta{
  flex:0 0 auto;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:12px 8px;
  border-radius:var(--r-pill);
  background:var(--amber-gold);
  color:var(--ink-black);
  font-size:13px;
  font-weight:700;
  letter-spacing:.06em;
  text-align:center;
  transition:background var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.rail-cta:hover{background:#FFCA7E;transform:translateY(-2px);}
.rail-cta-short{writing-mode:vertical-rl;text-orientation:upright;letter-spacing:.16em;}
.rail-cta-full{display:none;}

/* 移动唤出按钮 */
.nav-toggle{
  position:fixed;
  top:12px;
  left:12px;
  z-index:90;
  display:none;
  align-items:center;
  gap:10px;
  padding:9px 16px 9px 13px;
  border-radius:var(--r-pill);
  background:rgba(10,26,47,.92);
  border:1px solid var(--hairline-strong);
  color:var(--paper-warm);
  font-size:13px;
  letter-spacing:.1em;
  cursor:pointer;
  box-shadow:0 12px 34px rgba(0,0,0,.5);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
}
.nav-toggle:hover{border-color:var(--neon-cyan);color:var(--neon-cyan);}
.nav-toggle-bars{display:flex;flex-direction:column;gap:3px;width:16px;}
.nav-toggle-bars span{
  display:block;
  height:2px;
  border-radius:2px;
  background:var(--neon-cyan);
  transition:transform var(--dur) var(--ease),opacity 200ms var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1){transform:translateY(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(-5px) rotate(-45deg);}
.nav-toggle-text{white-space:nowrap;}

/* 移动遮罩 */
.rail-scrim{
  position:fixed;
  inset:0;
  z-index:70;
  display:none;
  background:rgba(5,10,20,.68);
  opacity:0;
  pointer-events:none;
  transition:opacity var(--dur) var(--ease);
}
.rail-scrim[data-open="true"]{opacity:1;pointer-events:auto;}

/* ---------- 5. 页脚 ---------- */
.site-foot{
  position:relative;
  margin-top:clamp(64px,9vw,120px);
  padding:clamp(48px,7vw,88px) 0 clamp(26px,4vw,42px);
  background:linear-gradient(180deg,var(--abyss-navy),var(--vault-void));
  border-top:1px solid var(--hairline-strong);
  overflow:hidden;
}
.site-foot::before{
  content:"";
  position:absolute;
  top:-160px;
  right:-120px;
  width:520px;
  height:520px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(51,230,210,.14),rgba(5,10,20,0) 68%);
  pointer-events:none;
}
.foot-grid{
  position:relative;
  display:grid;
  grid-template-columns:1.5fr .9fr .9fr .8fr 1.5fr;
  gap:clamp(24px,3vw,48px);
}
.foot-brand{display:flex;flex-direction:column;gap:16px;align-items:flex-start;}
.foot-brand .brand-text{opacity:1;max-width:none;}
.foot-note{
  font-size:13px;
  line-height:1.9;
  color:var(--mist-gray);
  max-width:34ch;
}
.foot-status{display:flex;flex-wrap:wrap;gap:8px;}
.foot-col{display:flex;flex-direction:column;gap:16px;}
.foot-title{
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:400;
  letter-spacing:.18em;
  color:var(--neon-cyan);
  text-transform:uppercase;
}
.foot-list{display:flex;flex-direction:column;gap:10px;}
.foot-list li{position:relative;padding-left:14px;}
.foot-list li::before{
  content:"";
  position:absolute;
  left:0;
  top:.85em;
  width:5px;
  height:5px;
  border-radius:50%;
  background:rgba(51,230,210,.5);
}
.foot-list a{
  font-size:14px;
  color:var(--mist-gray);
  transition:color var(--dur) var(--ease);
}
.foot-list a:hover{color:var(--neon-cyan);}
.foot-list--plain li{display:flex;flex-wrap:wrap;gap:8px;align-items:baseline;}
.foot-key{
  flex:0 0 auto;
  font-size:11px;
  letter-spacing:.12em;
  color:rgba(154,176,198,.75);
}
.foot-value{
  font-size:13px;
  color:var(--paper-warm);
  word-break:break-all;
  font-variant-numeric:tabular-nums;
}
.foot-tip{
  font-size:12px;
  line-height:1.8;
  color:var(--mist-gray);
  padding-top:4px;
  border-top:1px dashed rgba(154,176,198,.28);
}
.foot-base{
  position:relative;
  margin-top:clamp(32px,5vw,56px);
  padding-top:22px;
  border-top:1px solid var(--hairline);
  display:flex;
  flex-wrap:wrap;
  gap:12px 32px;
  justify-content:space-between;
  align-items:baseline;
}
.foot-addr{
  font-size:12px;
  color:var(--mist-gray);
  letter-spacing:.02em;
}
.foot-legal{
  font-size:12px;
  color:var(--mist-gray);
  letter-spacing:.06em;
  font-variant-numeric:tabular-nums;
}

/* ---------- 6. 版式容器 ---------- */
.container{
  width:100%;
  max-width:var(--maxw);
  margin:0 auto;
  padding-left:clamp(18px,4vw,48px);
  padding-right:clamp(18px,4vw,48px);
}
.section{padding:clamp(48px,7vw,96px) 0;}
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  margin-bottom:clamp(24px,3.4vw,44px);
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:12px;
  letter-spacing:.2em;
  color:var(--neon-cyan);
}
.eyebrow::before{
  content:"";
  width:22px;
  height:1px;
  background:var(--neon-cyan);
}
.grid{display:grid;gap:var(--gutter);}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr));}
.grid--auto{grid-template-columns:repeat(auto-fit,minmax(250px,1fr));}

/* ---------- 7. 通用组件 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:12px 22px;
  border-radius:var(--r-pill);
  border:1px solid transparent;
  font-family:var(--font-mono);
  font-size:14px;
  font-weight:700;
  letter-spacing:.04em;
  cursor:pointer;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.btn--primary{background:var(--amber-gold);color:var(--ink-black);}
.btn--primary:hover{background:#FFC97C;transform:translateY(-2px);}
.btn--ghost{border-color:var(--hairline-strong);color:var(--neon-cyan);}
.btn--ghost:hover{border-color:var(--neon-cyan);background:rgba(51,230,210,.1);color:var(--paper-warm);}

.tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:5px 13px;
  border-radius:var(--r-pill);
  border:1px solid rgba(154,176,198,.35);
  color:var(--mist-gray);
  font-size:12px;
  letter-spacing:.08em;
  white-space:nowrap;
}
.tag[data-state="ok"]{color:var(--jade-signal);border-color:rgba(76,212,138,.45);}
.tag[data-state="warn"]{color:var(--alert-ember);border-color:rgba(255,106,77,.45);}
.tag[data-state="info"]{color:var(--neon-cyan);border-color:rgba(51,230,210,.45);}
.tag[data-state="key"]{color:var(--amber-gold);border-color:rgba(255,180,84,.45);}

.card{
  position:relative;
  padding:22px;
  border-radius:var(--r-card);
  background:linear-gradient(160deg,rgba(18,41,63,.92),rgba(10,26,47,.92));
  border:1px solid var(--hairline);
  transition:border-color var(--dur) var(--ease),transform var(--dur) var(--ease),background var(--dur) var(--ease);
}
.card:hover{border-color:var(--hairline-strong);transform:translateY(-3px);}
.card-title{
  font-family:var(--font-display);
  font-weight:800;
  font-size:19px;
  line-height:1.35;
}
.card-meta{
  font-size:12px;
  letter-spacing:.08em;
  color:var(--mist-gray);
  font-variant-numeric:tabular-nums;
}

.panel{
  padding:clamp(20px,3vw,34px);
  border-radius:var(--r-card);
  background:rgba(18,41,63,.55);
  border:1px solid var(--hairline);
}
.panel--paper{
  background-color:var(--paper-warm);
  background-image:repeating-linear-gradient(90deg,rgba(18,22,28,.035) 0 1px,rgba(0,0,0,0) 1px 5px);
  color:var(--ink-black);
  border:1px solid var(--paper-edge);
  border-radius:var(--r-paper);
}
.panel--paper h2,.panel--paper h3,.panel--paper h4{color:var(--ink-black);}
.panel--paper .link,.panel--paper a{color:#0C5F58;text-decoration:underline;text-underline-offset:3px;}
.panel--paper .muted,.panel--paper .annotation{color:#5A6472;}

.stat{
  display:flex;
  flex-direction:column;
  gap:6px;
  padding:16px 18px;
  border-radius:var(--r-soft);
  background:rgba(18,41,63,.62);
  border:1px solid var(--hairline);
}
.stat-value{
  font-family:var(--font-mono);
  font-size:clamp(20px,2.6vw,30px);
  font-weight:700;
  color:var(--neon-cyan);
  font-variant-numeric:tabular-nums;
  line-height:1.2;
}
.stat-label{font-size:12px;letter-spacing:.1em;color:var(--mist-gray);}

.data-table{width:100%;font-size:14px;}
.data-table th,.data-table td{
  text-align:left;
  padding:12px 14px;
  border-bottom:1px solid var(--hairline);
  vertical-align:top;
}
.data-table th{
  font-weight:400;
  font-size:12px;
  letter-spacing:.12em;
  color:var(--mist-gray);
}
.data-table code{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  color:var(--neon-cyan);
}
.panel--paper .data-table th,
.panel--paper .data-table td{border-bottom-color:var(--paper-edge);}
.panel--paper .data-table th{color:#5A6472;}
.panel--paper .data-table code{color:#0C5F58;}

.breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  font-size:12px;
  letter-spacing:.06em;
  color:var(--mist-gray);
}
.breadcrumbs li{display:flex;align-items:center;gap:10px;}
.breadcrumbs li + li::before{content:"/";color:rgba(154,176,198,.5);}
.breadcrumbs a{color:var(--mist-gray);}
.breadcrumbs a:hover{color:var(--neon-cyan);}
.breadcrumbs [aria-current="page"]{color:var(--paper-warm);}

.prose{max-width:38em;font-size:16px;}
.prose > * + *{margin-top:1.1em;}
.prose h2,.prose h3{margin-top:1.9em;}
.prose ul,.prose ol{display:flex;flex-direction:column;gap:.55em;}
.prose li{position:relative;padding-left:1.2em;}
.prose li::before{
  content:"";
  position:absolute;
  left:0;
  top:.78em;
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--neon-cyan);
}
.prose code{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  padding:2px 6px;
  border-radius:6px;
  background:rgba(51,230,210,.12);
  color:var(--neon-cyan);
  font-size:.94em;
}
.panel--paper .prose code{background:rgba(12,95,88,.12);color:#0C5F58;}

.annotation{
  font-size:12px;
  line-height:1.75;
  letter-spacing:.08em;
  color:var(--mist-gray);
}
.annotation--vertical{
  writing-mode:vertical-rl;
  text-orientation:mixed;
  letter-spacing:.24em;
}

.media-frame{
  position:relative;
  display:block;
  width:100%;
  border-radius:var(--r-card);
  overflow:hidden;
  border:1px solid var(--hairline);
  background-image:linear-gradient(135deg,var(--abyss-navy),var(--vault-void)),linear-gradient(rgba(51,230,210,.06) 1px,transparent 1px);
  background-size:100% 100%,24px 24px;
}
.media-frame::before{
  content:"";
  display:block;
  padding-top:var(--ratio,56.25%);
}
.media-frame > img,
.media-frame > svg,
.media-frame > .media-body{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame--square{--ratio:100%;}
.media-frame--wide{--ratio:42%;}
.media-frame--tall{--ratio:126%;}

/* 折叠内容组 */
.accordion{display:flex;flex-direction:column;gap:12px;}
.accordion-item{
  border-radius:var(--r-soft);
  background:rgba(18,41,63,.7);
  border:1px solid var(--hairline);
  overflow:hidden;
}
.accordion-heading{margin:0;font-size:inherit;}
.accordion-trigger{
  display:flex;
  width:100%;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:16px 18px;
  text-align:left;
  font-family:var(--font-display);
  font-weight:800;
  font-size:16px;
  color:var(--paper-warm);
  cursor:pointer;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease);
}
.accordion-trigger::after{
  content:"";
  flex:0 0 auto;
  width:9px;
  height:9px;
  border-right:2px solid var(--neon-cyan);
  border-bottom:2px solid var(--neon-cyan);
  transform:rotate(45deg);
  transition:transform var(--dur) var(--ease);
}
.accordion-trigger[aria-expanded="true"]::after{transform:rotate(-135deg);}
.accordion-trigger:hover{background:rgba(51,230,210,.07);color:var(--neon-cyan);}
.accordion-panel{padding:0 18px 18px;font-size:15px;color:var(--paper-warm);}
.accordion-panel:not([hidden]){animation:panel-in 320ms var(--ease);}
@keyframes panel-in{
  from{opacity:0;transform:translateY(-8px);}
  to{opacity:1;transform:none;}
}

/* 纯前端筛选 */
.filter{display:flex;flex-wrap:wrap;gap:10px;}
.filter-btn{
  padding:8px 16px;
  border-radius:var(--r-pill);
  border:1px solid rgba(154,176,198,.32);
  color:var(--mist-gray);
  font-size:13px;
  letter-spacing:.06em;
  cursor:pointer;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.filter-btn:hover{border-color:var(--neon-cyan);color:var(--neon-cyan);}
.filter-btn[aria-pressed="true"]{
  background:var(--neon-cyan);
  border-color:var(--neon-cyan);
  color:var(--vault-void);
  font-weight:700;
}
[data-tag-item][hidden]{display:none;}
.filter-empty{font-size:13px;color:var(--mist-gray);}

/* ---------- 8. 动效 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity var(--dur-slow) var(--ease),transform var(--dur-slow) var(--ease);
}
[data-reveal].is-visible{opacity:1;transform:none;}

.scroll-progress{
  position:fixed;
  top:0;
  left:0;
  z-index:120;
  width:100%;
  height:3px;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--neon-cyan),var(--amber-gold));
  pointer-events:none;
}

/* ---------- 9. 响应式 ---------- */
@media (min-width:1024px){
  body{padding-left:var(--rail-w);}
  .scroll-progress{left:var(--rail-w);width:auto;right:0;}

  .rail:hover,
  .rail:focus-within,
  .rail[data-expanded="true"]{
    width:var(--rail-w-open);
    box-shadow:26px 0 70px rgba(0,0,0,.55);
  }
  .rail:is(:hover,:focus-within,[data-expanded="true"]) .brand-text,
  .rail:is(:hover,:focus-within,[data-expanded="true"]) .brand-note{
    opacity:1;
    max-width:190px;
    max-height:80px;
  }
  .rail:is(:hover,:focus-within,[data-expanded="true"]) .rail-label{
    opacity:1;
    max-width:190px;
  }
  .rail:is(:hover,:focus-within,[data-expanded="true"]) .rail-token{display:none;}
  .rail:is(:hover,:focus-within,[data-expanded="true"]) .rail-utility{
    opacity:1;
    max-height:120px;
  }
  .rail:is(:hover,:focus-within,[data-expanded="true"]) .rail-icp{
    opacity:1;
    max-height:52px;
  }
  .rail:is(:hover,:focus-within,[data-expanded="true"]) .rail-cta{padding:12px 16px;}
  .rail:is(:hover,:focus-within,[data-expanded="true"]) .rail-cta-short{display:none;}
  .rail:is(:hover,:focus-within,[data-expanded="true"]) .rail-cta-full{display:inline;}
}

@media (max-width:1023px){
  body{padding-top:62px;background-attachment:scroll;}
  body[data-nav-open="true"]{overflow:hidden;}

  .rail{
    width:min(320px,84vw);
    transform:translateX(-104%);
    padding:74px 18px 22px;
    border-right:1px solid var(--hairline-strong);
    box-shadow:0 0 90px rgba(0,0,0,.7);
    overscroll-behavior:contain;
  }
  .rail[data-open="true"]{transform:translateX(0);}
  .rail .brand-text,
  .rail .brand-note{opacity:1;max-width:200px;max-height:90px;}
  .rail .rail-label{opacity:1;max-width:200px;}
  .rail .rail-token{display:none;}
  .rail .rail-utility{opacity:1;max-height:140px;}
  .rail .rail-icp{opacity:1;max-height:52px;}
  .rail .rail-cta{padding:14px 18px;}
  .rail .rail-cta-short{display:none;}
  .rail .rail-cta-full{display:inline;}
  .rail-foot{flex-direction:row;flex-wrap:wrap;gap:16px;}
  .rail-link{min-height:48px;}

  .nav-toggle{display:inline-flex;}
  .rail-scrim{display:block;}
}

@media (max-width:1180px){
  .foot-grid{grid-template-columns:1.4fr 1fr 1fr;}
}
@media (max-width:900px){
  .foot-grid{grid-template-columns:1fr 1fr;}
  .foot-brand{grid-column:1 / -1;}
  .grid--12{grid-template-columns:repeat(6,minmax(0,1fr));}
}
@media (max-width:640px){
  body{font-size:15.5px;}
  .foot-grid{grid-template-columns:1fr;}
  .grid--12{grid-template-columns:repeat(2,minmax(0,1fr));}
  .foot-base{flex-direction:column;align-items:flex-start;}
  .card{padding:18px;}
  .section{padding:44px 0;}
}

/* ---------- 10. 降低动效 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  [data-reveal]{opacity:1;transform:none;}
  .card:hover{transform:none;}
  .btn--primary:hover{transform:none;}
  .rail-cta:hover{transform:none;}
  .accordion-panel:not([hidden]){animation:none;}
  .scroll-progress{transition:none;}
}