/* ============================================================
   imToken 非托管钱包指引站 — /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 头部 / 页脚 / 基础组件
   ============================================================ */

/* ---------- 1. tokens ---------- */
:root{
  --void:#06090F;
  --slate:#0D1522;
  --glass:rgba(20,30,50,.58);
  --glass-strong:rgba(13,21,34,.86);

  --brand:#2A6BFF;
  --brand-dim:#1B4ACB;
  --violet:#6C4CF1;
  --cyan:#22D3EE;
  --amber:#FF8A3D;
  --mint:#3FD6A4;

  --text:#EAF1FF;
  --text-2:#98A7C4;
  --hair:#1C2740;
  --hair-soft:rgba(28,39,64,.62);

  --rail:220px;
  --topbar:60px;
  --maxw:1200px;

  --r-xs:5px;
  --r-sm:6px;
  --r-md:10px;
  --r-lg:14px;
  --r-pill:999px;

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

  --ease:cubic-bezier(.22,.61,.36,1);

  --z-header:80;
  --z-totop:70;
  --z-plate:20;
}

@media (max-width:1023px){
  :root{ --rail:0px; }
}

/* ---------- 2. reset ---------- */
*,*::before,*::after{box-sizing:border-box}

html{
  -webkit-text-size-adjust:100%;
  text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:24px;
}

body{
  margin:0;
  min-height:100%;
  font-family:var(--sans);
  font-size:1rem;
  line-height:1.78;
  letter-spacing:.01em;
  color:var(--text);
  background-color:var(--void);
  background-image:
    radial-gradient(78rem 52rem at 92% -8%, rgba(108,76,241,.17), transparent 62%),
    radial-gradient(64rem 46rem at -12% 12%, rgba(42,107,255,.15), transparent 60%),
    linear-gradient(180deg,#06090F 0%,#08101C 48%,#06090F 100%);
  background-repeat:no-repeat;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background-image:
    linear-gradient(to right, rgba(28,39,64,.5) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(28,39,64,.5) 1px, transparent 1px);
  background-size:72px 72px;
  -webkit-mask-image:radial-gradient(120% 82% at 50% 0%, #000 0%, rgba(0,0,0,.22) 56%, transparent 86%);
  mask-image:radial-gradient(120% 82% at 50% 0%, #000 0%, rgba(0,0,0,.22) 56%, transparent 86%);
}

h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd,pre{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
input,select,textarea{font:inherit}
table{border-collapse:collapse;width:100%}
hr{border:0}

:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:2px;
  border-radius:var(--r-xs);
}

::selection{background:rgba(42,107,255,.42);color:#fff}

/* ---------- 3. 中文排版 ---------- */
h1,h2,h3,h4{line-height:1.22;font-weight:800;letter-spacing:-.02em;color:var(--text)}
h1{font-size:clamp(1.875rem,3.4vw,2.75rem)}
h2{font-size:clamp(1.4rem,2.3vw,2rem)}
h3{font-size:1.1875rem;letter-spacing:-.01em}
h4{font-size:1rem;letter-spacing:0}

p{color:var(--text-2);max-width:68ch}
strong{color:var(--text);font-weight:700}

.mono{
  font-family:var(--mono);
  font-variant-ligatures:none;
  letter-spacing:.02em;
  font-feature-settings:"tnum" 1;
}

/* ---------- 4. 骨架偏移 ---------- */
#main-content{
  margin-left:var(--rail);
  min-height:60vh;
}

@media (max-width:1023px){
  #main-content{
    margin-left:0;
    padding-top:var(--topbar);
  }
}

.wrap{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:clamp(18px,4vw,44px);
}

/* ---------- 5. skip link ---------- */
.skip-link{
  position:fixed;
  top:10px;
  left:10px;
  z-index:200;
  display:inline-block;
  padding:10px 16px;
  border-radius:var(--r-sm);
  background:var(--brand);
  color:#fff;
  font-size:.8125rem;
  font-weight:600;
  letter-spacing:.02em;
  transform:translateY(-180%);
  transition:transform .2s var(--ease);
}
.skip-link:focus-visible{transform:none}

/* ---------- 6. header ---------- */
.site-header{
  position:fixed;
  top:0;
  left:0;
  bottom:0;
  width:var(--rail);
  z-index:var(--z-header);
  display:flex;
  flex-direction:column;
  gap:20px;
  padding:26px 18px 22px;
  background-color:transparent;
  border-right:1px solid transparent;
  transition:
    background-color .24s var(--ease),
    border-color .24s var(--ease),
    -webkit-backdrop-filter .24s var(--ease),
    backdrop-filter .24s var(--ease);
}

.site-header.is-scrolled{
  background-color:var(--glass);
  border-right-color:var(--hair);
  -webkit-backdrop-filter:blur(18px) saturate(150%);
  backdrop-filter:blur(18px) saturate(150%);
}

.site-header::after{
  content:"";
  position:absolute;
  top:0;
  right:-1px;
  width:2px;
  height:calc(var(--progress,0) * 100%);
  background:linear-gradient(180deg,var(--cyan),var(--brand));
  border-radius:2px;
  pointer-events:none;
}

.site-header__top{
  display:flex;
  flex-direction:column;
  align-items:flex-start;
  gap:14px;
  flex:0 0 auto;
}

/* brand */
.brand{
  display:inline-flex;
  align-items:flex-start;
  gap:11px;
  min-width:0;
  color:var(--text);
}
.brand__mark{
  flex:none;
  display:grid;
  place-items:center;
  width:34px;
  height:34px;
  border-radius:9px;
  border:1px solid var(--hair);
  background:linear-gradient(148deg,rgba(42,107,255,.22),rgba(108,76,241,.14));
  color:var(--brand);
}
.brand__text{
  display:flex;
  flex-direction:column;
  gap:2px;
  min-width:0;
}
.brand__name{
  display:block;
  font-size:.9375rem;
  font-weight:800;
  line-height:1.34;
  letter-spacing:-.01em;
  color:var(--text);
}
.brand__sub{
  display:block;
  font-size:.6875rem;
  line-height:1.5;
  letter-spacing:.04em;
  color:var(--text-2);
}
.brand--footer .brand__mark{width:28px;height:28px;border-radius:8px}
.brand--footer .brand__name{font-size:.875rem}

/* nav toggle (mobile) */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:8px 12px;
  border:1px solid var(--hair);
  border-radius:var(--r-sm);
  background:rgba(20,30,50,.5);
  color:var(--text);
  font-size:.75rem;
  letter-spacing:.08em;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle__bars{display:grid;gap:4px}
.nav-toggle__bar{
  display:block;
  width:16px;
  height:1.5px;
  border-radius:2px;
  background:currentColor;
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1){transform:translateY(5.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3){transform:translateY(-5.5px) rotate(-45deg)}

/* nav */
.site-nav{
  display:flex;
  flex-direction:column;
  gap:4px;
  flex:1 1 auto;
  min-height:0;
  margin-top:4px;
}
.site-nav__eyebrow{
  font-size:.625rem;
  font-weight:700;
  letter-spacing:.22em;
  color:var(--text-2);
  margin-bottom:8px;
  max-width:none;
}
.site-nav__list{display:grid;gap:2px}
.site-nav__link{
  position:relative;
  display:block;
  padding:8px 10px 8px 14px;
  border-radius:var(--r-sm);
  font-size:.875rem;
  line-height:1.5;
  color:var(--text-2);
  transition:
    color .18s var(--ease),
    background-color .18s var(--ease),
    padding-left .18s var(--ease);
}
.site-nav__link::before{
  content:"";
  position:absolute;
  left:2px;
  top:50%;
  width:8px;
  height:2px;
  border-radius:2px;
  background:var(--cyan);
  transform:translateY(-50%) scaleX(0);
  transform-origin:left center;
  transition:transform .18s var(--ease);
}
.site-nav__link:hover{
  color:var(--text);
  background-color:rgba(42,107,255,.09);
}
.site-nav__link[aria-current="page"]{
  color:var(--text);
  padding-left:18px;
  background-image:linear-gradient(90deg,rgba(34,211,238,.16),rgba(42,107,255,.05));
}
.site-nav__link[aria-current="page"]::before{transform:translateY(-50%) scaleX(1)}

.site-nav__actions{
  display:grid;
  gap:8px;
  margin-top:18px;
}
.site-nav__ver{
  display:flex;
  align-items:center;
  gap:8px;
  margin-top:auto;
  padding-top:16px;
  border-top:1px solid var(--hair-soft);
  font-size:.6875rem;
  letter-spacing:.06em;
  color:var(--text-2);
  max-width:none;
}
.site-nav__ver .mono{color:var(--cyan);font-size:.75rem}
.site-nav__verlabel{color:var(--text-2)}

/* ---------- 7. buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:10px 16px;
  border:1px solid transparent;
  border-radius:var(--r-sm);
  font-size:.8125rem;
  font-weight:700;
  letter-spacing:.03em;
  line-height:1.4;
  text-align:center;
  transition:
    background-color .18s var(--ease),
    border-color .18s var(--ease),
    color .18s var(--ease),
    transform .18s var(--ease);
}
.btn:active{transform:translateY(1px)}
.btn--primary{
  background-color:var(--brand);
  color:#fff;
  box-shadow:0 10px 26px -18px rgba(42,107,255,1);
}
.btn--primary:hover{background-color:var(--brand-dim)}
.btn--ghost{
  background-color:rgba(20,30,50,.45);
  border-color:var(--hair);
  color:var(--text);
}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.btn--block{width:100%}
.btn--sm{padding:7px 12px;font-size:.75rem}

/* ---------- 8. footer ---------- */
.site-footer{
  position:relative;
  z-index:1;
  margin-top:clamp(56px,7vw,104px);
  margin-left:var(--rail);
  border-top:1px solid var(--hair);
  background-image:linear-gradient(180deg,rgba(13,21,34,.55),rgba(6,9,15,.94));
}

.site-footer__inner{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding:clamp(32px,4.6vw,56px) clamp(18px,4vw,44px) 30px;
}

.site-footer__grid{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.7fr);
  gap:clamp(28px,4vw,56px);
  align-items:start;
}

.site-footer__brandcol{min-width:0}

.site-footer__claim{
  margin-top:18px;
  font-size:.8125rem;
  letter-spacing:.04em;
  color:var(--text-2);
  max-width:34ch;
}
.site-footer__ver{margin-top:10px}
.site-footer__ver .mono{
  font-size:.75rem;
  color:var(--cyan);
  letter-spacing:.08em;
}
.site-footer__caution{
  margin-top:16px;
  max-width:36ch;
  padding-left:12px;
  border-left:2px solid var(--amber);
  font-size:.75rem;
  line-height:1.7;
  color:var(--text-2);
}

.site-footer__nav{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(20px,3vw,36px);
}
.site-footer__col{min-width:0}
.site-footer__coltitle{
  margin-bottom:12px;
  font-size:.6875rem;
  font-weight:700;
  letter-spacing:.16em;
  color:var(--text-2);
}
.site-footer__list{display:grid;gap:9px}
.site-footer__link{
  display:inline-block;
  font-size:.875rem;
  line-height:1.5;
  color:var(--text-2);
  transition:color .18s var(--ease);
}
.site-footer__link:hover{color:var(--cyan);text-decoration:underline;text-underline-offset:3px}

.site-footer__meta{
  margin-top:clamp(28px,4vw,48px);
  padding-top:22px;
  border-top:1px solid var(--hair-soft);
  display:grid;
  gap:6px;
}
.site-footer__line{
  font-size:.75rem;
  line-height:1.75;
  color:var(--text-2);
  max-width:none;
}
.site-footer__line--legal{color:var(--text-2)}

/* to-top */
.to-top{
  position:fixed;
  right:20px;
  bottom:20px;
  z-index:var(--z-totop);
  display:grid;
  place-items:center;
  width:42px;
  height:42px;
  border-radius:50%;
  border:1px solid var(--hair);
  background-color:var(--glass-strong);
  -webkit-backdrop-filter:blur(14px) saturate(150%);
  backdrop-filter:blur(14px) saturate(150%);
  color:var(--text);
  visibility:hidden;
  opacity:0;
  transform:translateY(8px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),border-color .18s var(--ease),color .18s var(--ease),visibility .24s linear;
}
.to-top.is-visible{visibility:visible;opacity:1;transform:none}
.to-top:hover{border-color:var(--cyan);color:var(--cyan)}

/* ---------- 9. 基础内容组件 ---------- */
.card{
  position:relative;
  border:1px solid var(--hair);
  border-radius:var(--r-lg);
  background-color:var(--slate);
  background-image:linear-gradient(158deg,rgba(42,107,255,.07),transparent 58%);
  padding:clamp(18px,2.4vw,26px);
}
.card__label{
  display:block;
  font-size:.625rem;
  font-weight:700;
  letter-spacing:.2em;
  color:var(--text-2);
  margin-bottom:10px;
}
.card__title{
  font-size:1.0625rem;
  font-weight:800;
  letter-spacing:-.01em;
  color:var(--text);
  margin-bottom:8px;
}
.card__body{
  font-size:.875rem;
  line-height:1.78;
  color:var(--text-2);
}

.plate{
  border:1px solid var(--hair);
  border-radius:var(--r-lg);
  background-color:var(--glass);
  -webkit-backdrop-filter:blur(16px) saturate(150%);
  backdrop-filter:blur(16px) saturate(150%);
  padding:clamp(18px,2.4vw,26px);
}
.plate__head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding-bottom:14px;
  margin-bottom:14px;
  border-bottom:1px solid var(--hair-soft);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 9px;
  border-radius:var(--r-pill);
  border:1px solid var(--hair);
  background-color:rgba(20,30,50,.55);
  font-size:.6875rem;
  letter-spacing:.06em;
  line-height:1.6;
  color:var(--text-2);
}
.tag--brand{color:var(--cyan);border-color:rgba(34,211,238,.34);background-color:rgba(34,211,238,.08)}
.tag--violet{color:#B9A7FF;border-color:rgba(108,76,241,.38);background-color:rgba(108,76,241,.12)}
.tag--warn{color:var(--amber);border-color:rgba(255,138,61,.34);background-color:rgba(255,138,61,.1)}
.tag--ok{color:var(--mint);border-color:rgba(63,214,164,.34);background-color:rgba(63,214,164,.1)}

.checklist{display:grid;gap:10px}
.checklist__item{
  display:flex;
  align-items:flex-start;
  gap:12px;
  padding:12px 14px;
  border:1px solid var(--hair);
  border-radius:var(--r-md);
  background-color:rgba(13,21,34,.6);
  transition:border-color .18s var(--ease),background-color .18s var(--ease);
}
.checklist__item[data-done]{
  border-color:rgba(63,214,164,.42);
  background-color:rgba(63,214,164,.06);
}
.checklist__text{
  font-size:.875rem;
  line-height:1.7;
  color:var(--text);
  transition:color .18s var(--ease);
}
.checklist__item[data-done] .checklist__text{color:var(--text-2)}

[data-check]{
  flex:none;
  display:inline-grid;
  place-items:center;
  width:20px;
  height:20px;
  margin-top:2px;
  border:1px solid var(--hair);
  border-radius:var(--r-xs);
  background-color:rgba(20,30,50,.6);
  color:transparent;
  font-size:.6875rem;
  line-height:1;
  transition:border-color .16s var(--ease),background-color .16s var(--ease),color .16s var(--ease);
}
[data-check]::after{content:"✓"}
[data-check][aria-checked="true"]{
  border-color:var(--mint);
  background-color:rgba(63,214,164,.14);
  color:var(--mint);
}

.hairline{
  height:1px;
  width:100%;
  border:0;
  background-color:var(--hair);
}

/* 图片容器（页面阶段放置 picture / img / svg） */
.media{
  position:relative;
  display:block;
  overflow:hidden;
  border:1px solid var(--hair);
  border-radius:var(--r-lg);
  background-color:var(--slate);
  background-image:
    linear-gradient(140deg,rgba(42,107,255,.16),rgba(108,76,241,.1) 55%,rgba(34,211,238,.08)),
    repeating-linear-gradient(90deg,rgba(28,39,64,.55) 0 1px,transparent 1px 48px);
  aspect-ratio:16 / 10;
}
.media > img,
.media > svg,
.media > picture,
.media > picture > img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.media--wide{aspect-ratio:21 / 9}
.media--square{aspect-ratio:1 / 1}
.media--tall{aspect-ratio:3 / 4}
.media__scrim{
  position:absolute;
  inset:auto 0 0 0;
  height:52%;
  background-image:linear-gradient(180deg,transparent,rgba(6,9,15,.86));
  pointer-events:none;
}
.media__caption{
  position:absolute;
  left:14px;
  right:14px;
  bottom:12px;
  font-size:.6875rem;
  line-height:1.6;
  letter-spacing:.03em;
  color:var(--text-2);
}

/* 通用网格 */
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(16px,2.4vw,32px)}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(16px,2.4vw,28px)}
@media (max-width:900px){
  .grid-2,.grid-3{grid-template-columns:minmax(0,1fr)}
}

/* 目录跟随高亮（配合 data-toc-link） */
[data-toc-link]{
  position:relative;
  display:block;
  padding:7px 10px 7px 14px;
  border-radius:var(--r-sm);
  font-size:.8125rem;
  color:var(--text-2);
  transition:color .18s var(--ease),background-color .18s var(--ease),padding-left .18s var(--ease);
}
[data-toc-link]::before{
  content:"";
  position:absolute;
  left:2px;
  top:50%;
  width:8px;
  height:2px;
  border-radius:2px;
  background-color:var(--cyan);
  transform:translateY(-50%) scaleX(0);
  transform-origin:left center;
  transition:transform .18s var(--ease);
}
[data-toc-link]:hover{color:var(--text);background-color:rgba(42,107,255,.08)}
[data-toc-link][data-current]{
  color:var(--text);
  padding-left:18px;
  background-image:linear-gradient(90deg,rgba(34,211,238,.14),transparent);
}
[data-toc-link][data-current]::before{transform:translateY(-50%) scaleX(1)}

/* ---------- 10. 入场动效 ---------- */
.js-reveal [data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .32s var(--ease),transform .32s var(--ease);
}
.js-reveal [data-reveal].is-visible{
  opacity:1;
  transform:none;
}

/* ---------- 11. 响应式 ---------- */
@media (max-width:1023px){
  .site-header{
    top:0;
    left:0;
    right:0;
    bottom:auto;
    width:auto;
    height:var(--topbar);
    flex-direction:row;
    align-items:center;
    justify-content:space-between;
    gap:12px;
    padding:0 16px;
    border-right:0;
    border-bottom:1px solid transparent;
  }
  .site-header.is-scrolled{
    background-color:var(--glass-strong);
    border-bottom-color:var(--hair);
  }
  .site-header::after{
    top:auto;
    bottom:-1px;
    right:auto;
    left:0;
    width:calc(var(--progress,0) * 100%);
    height:2px;
    background-image:linear-gradient(90deg,var(--cyan),var(--brand));
  }

  .site-header__top{
    flex:1 1 auto;
    min-width:0;
    flex-direction:row;
    align-items:center;
    justify-content:space-between;
    gap:12px;
  }

  .brand{align-items:center}
  .brand__mark{width:30px;height:30px;border-radius:8px}
  .brand__name{font-size:.8125rem;line-height:1.3}

  .nav-toggle{display:inline-flex}

  .site-nav{
    position:fixed;
    top:var(--topbar);
    left:0;
    right:0;
    flex:0 0 auto;
    margin-top:0;
    max-height:calc(100dvh - var(--topbar));
    overflow-y:auto;
    padding:18px 16px 26px;
    background-color:var(--glass-strong);
    -webkit-backdrop-filter:blur(20px) saturate(150%);
    backdrop-filter:blur(20px) saturate(150%);
    border-bottom:1px solid var(--hair);
    transform:translateY(-10px);
    opacity:0;
    visibility:hidden;
    pointer-events:none;
    transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s linear;
  }
  .site-nav[data-open]{
    transform:none;
    opacity:1;
    visibility:visible;
    pointer-events:auto;
  }
  .site-nav__link{padding:11px 10px 11px 16px;font-size:.9375rem}
  .site-nav__link[aria-current="page"]{padding-left:20px}
  .site-nav__actions{grid-template-columns:repeat(2,minmax(0,1fr));margin-top:20px}
  .site-nav__ver{margin-top:20px;padding-top:16px}
}

@media (max-width:640px){
  .brand__sub{display:none}
  .site-nav__actions{grid-template-columns:minmax(0,1fr)}
  .to-top{right:14px;bottom:14px;width:40px;height:40px}
}

@media (max-width:860px){
  .site-footer__grid{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:560px){
  .site-footer__nav{grid-template-columns:repeat(2,minmax(0,1fr))}
}

/* ---------- 12. 动效降级 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    transition-delay:0ms !important;
  }
  .js-reveal [data-reveal]{opacity:1;transform:none}
  .site-header::after{transition:none}
}