/* ============================================================
   易发老版 · /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 页头 / 页脚 / 通用组件
   ============================================================ */

:root{
  --c-ink-900:#0B211C;
  --c-ink-700:#143A31;
  --c-amber-500:#E39B3A;
  --c-amber-200:#F3CE92;
  --c-crt-400:#6FF3A8;
  --c-paper-100:#F4EAD7;
  --c-paper-300:#DCCDB2;
  --c-graphite-800:#20211F;
  --c-rust-600:#B4552F;
  --c-slate-500:#5C6B66;

  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-condensed:"Heiti SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono","Courier New",monospace;

  --shell:1280px;
  --gutter:clamp(16px,4vw,56px);
  --gap:clamp(16px,2.4vw,32px);

  --hairline:1px solid rgba(220,205,178,.4);
  --hairline-deep:1px solid rgba(11,33,28,.22);

  --ease:cubic-bezier(.22,.68,.32,1);
  --dur:180ms;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:96px;
}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,dl,figure,blockquote,pre{margin:0}
ul,ol{padding:0;list-style:none}
img,picture,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;padding:0}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
::selection{background:var(--c-amber-500);color:var(--c-ink-900)}
:focus-visible{
  outline:2px solid var(--c-amber-500);
  outline-offset:2px;
}
.site-header :focus-visible,
.site-footer :focus-visible{outline-color:var(--c-crt-400)}

/* ---------- base ---------- */
body{
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  color:var(--c-graphite-800);
  background:var(--c-paper-100);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5,h6{
  font-family:var(--font-condensed);
  font-weight:800;
  line-height:1.15;
  letter-spacing:-.02em;
}
p{max-width:76ch}
strong,b{font-weight:700}

/* ---------- layout ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:var(--gap);
}
.grid-12 > *{min-width:0}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;
  left:16px;
  top:-120px;
  z-index:300;
  padding:10px 18px;
  background:var(--c-amber-500);
  color:var(--c-ink-900);
  font-size:14px;
  font-weight:700;
  letter-spacing:.04em;
  border:1px solid var(--c-ink-900);
  transition:top var(--dur) var(--ease);
}
.skip-link:focus{top:12px}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--c-ink-900);
  color:var(--c-paper-100);
  border-bottom:1px solid rgba(227,155,58,.55);
}
.site-header::after{
  content:"";
  display:block;
  height:5px;
  background-image:repeating-linear-gradient(90deg,rgba(227,155,58,.5) 0 1px,transparent 1px 14px);
  border-top:1px solid rgba(227,155,58,.28);
}
.site-header__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:var(--gap);
  min-height:76px;
  padding-block:10px;
}

/* ---------- brand ---------- */
.brand{
  display:flex;
  flex-direction:column;
  gap:2px;
  flex:none;
  padding-left:12px;
  border-left:3px solid var(--c-amber-500);
}
.brand__mark{
  font-family:var(--font-condensed);
  font-size:22px;
  font-weight:800;
  letter-spacing:.1em;
  line-height:1.15;
  color:var(--c-paper-100);
  transition:color var(--dur) var(--ease);
}
.brand:hover .brand__mark{color:var(--c-amber-200)}
.brand__meta{
  font-family:var(--font-mono);
  font-size:11px;
  line-height:1.3;
  letter-spacing:.12em;
  color:var(--c-crt-400);
}

/* ---------- nav toggle ---------- */
.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  flex:none;
  padding:8px 12px;
  border:1px solid var(--c-amber-500);
  color:var(--c-amber-200);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  cursor:pointer;
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.nav-toggle:hover{background:var(--c-amber-500);color:var(--c-ink-900)}
.nav-toggle__bars{display:grid;gap:3px}
.nav-toggle__bars i{
  display:block;
  width:16px;
  height:1px;
  background:currentColor;
}

/* ---------- primary nav ---------- */
.nav-primary{
  display:flex;
  align-items:center;
  gap:1.5rem;
  min-width:0;
}
.nav-primary__set{display:contents}
.nav-primary__legend{display:none}
.nav-link{
  position:relative;
  display:inline-block;
  flex:none;
  padding:6px 0;
  font-size:14px;
  font-weight:500;
  line-height:1.4;
  white-space:nowrap;
  color:var(--c-paper-100);
  transition:color var(--dur) var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  background:var(--c-amber-200);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform var(--dur) var(--ease);
}
.nav-link:hover,
.nav-link:focus-visible{color:var(--c-amber-200)}
.nav-link:hover::after,
.nav-link:focus-visible::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--c-amber-500)}
.nav-link[aria-current="page"]::after{
  transform:scaleX(1);
  background:var(--c-amber-500);
}
.nav-cta{flex:none;white-space:nowrap}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5em;
  padding:10px 18px;
  border:1px solid var(--c-amber-500);
  background:transparent;
  color:var(--c-amber-200);
  font-family:var(--font-sans);
  font-size:14px;
  font-weight:600;
  line-height:1.2;
  letter-spacing:.05em;
  text-align:center;
  cursor:pointer;
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.btn:hover{background:var(--c-amber-500);color:var(--c-ink-900)}
.btn:active{transform:translateY(1px)}
.btn--solid{background:var(--c-amber-500);border-color:var(--c-amber-500);color:var(--c-ink-900)}
.btn--solid:hover{background:var(--c-amber-200);border-color:var(--c-amber-200);color:var(--c-ink-900)}
.btn--ghost{background:transparent;border-color:var(--c-slate-500);color:var(--c-graphite-800)}
.btn--ghost:hover{background:var(--c-graphite-800);border-color:var(--c-graphite-800);color:var(--c-paper-100)}
.btn--sm{padding:7px 13px;font-size:12px;letter-spacing:.1em}

/* ---------- footer ---------- */
.site-footer{
  margin-top:calc(var(--gap) * 2);
  background:var(--c-ink-900);
  color:var(--c-paper-100);
  border-top:1px solid rgba(227,155,58,.55);
}
.site-footer::before{
  content:"";
  display:block;
  height:5px;
  background-image:repeating-linear-gradient(90deg,rgba(227,155,58,.5) 0 1px,transparent 1px 14px);
  border-bottom:1px solid rgba(227,155,58,.28);
}
.site-footer__grid{
  display:grid;
  grid-template-columns:minmax(0,1.5fr) minmax(0,1fr) minmax(0,1fr) minmax(0,1.6fr);
  gap:var(--gap);
  padding-block:clamp(32px,5vw,64px);
}
.footer-block{min-width:0}
.footer-brand{
  font-family:var(--font-condensed);
  font-size:20px;
  font-weight:800;
  letter-spacing:.12em;
  line-height:1.2;
  color:var(--c-paper-100);
}
.footer-note{
  margin-top:14px;
  max-width:34ch;
  font-size:13px;
  line-height:1.7;
  color:var(--c-paper-300);
}
.footer-code{
  margin-top:16px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--c-crt-400);
}
.footer-heading{
  margin-bottom:14px;
  padding-bottom:8px;
  border-bottom:1px solid rgba(220,205,178,.28);
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.24em;
  color:var(--c-amber-500);
}
.footer-links{display:grid;gap:8px}
.footer-links a{
  display:inline-block;
  font-size:14px;
  line-height:1.5;
  color:var(--c-paper-100);
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.footer-links a:hover,
.footer-links a:focus-visible{color:var(--c-amber-200);border-bottom-color:var(--c-amber-200)}
.footer-contact{display:grid;gap:0}
.footer-contact li{
  display:grid;
  grid-template-columns:42px minmax(0,1fr);
  gap:10px;
  padding-block:7px;
  border-bottom:1px dashed rgba(220,205,178,.18);
  font-size:13px;
  line-height:1.65;
  color:var(--c-paper-300);
}
.footer-contact li:last-child{border-bottom:0}
.footer-label{
  font-family:var(--font-mono);
  font-size:10px;
  line-height:1.9;
  letter-spacing:.14em;
  color:var(--c-amber-500);
}
.footer-bar{
  background:var(--c-ink-700);
  border-top:1px solid rgba(220,205,178,.24);
}
.footer-bar__inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px var(--gap);
  padding-block:16px;
}
.footer-jump{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding-bottom:2px;
  border-bottom:1px solid rgba(111,243,168,.45);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--c-crt-400);
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.footer-jump:hover,
.footer-jump:focus-visible{color:var(--c-paper-100);border-bottom-color:var(--c-amber-200)}
.footer-jump::after{content:"→"}
.footer-copy{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--c-paper-300);
}

/* ---------- breadcrumbs ---------- */
.crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  padding-block:18px 0;
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.6;
  letter-spacing:.06em;
  color:var(--c-slate-500);
}
.crumbs a{
  color:var(--c-slate-500);
  border-bottom:1px dashed var(--c-paper-300);
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.crumbs a:hover,
.crumbs a:focus-visible{color:var(--c-graphite-800);border-bottom-color:var(--c-amber-500)}
.crumbs__sep{color:var(--c-paper-300)}
.crumbs [aria-current="page"]{color:var(--c-graphite-800)}

/* ---------- prose ---------- */
.prose{
  max-width:70ch;
  font-size:16px;
  line-height:1.75;
  color:var(--c-graphite-800);
}
.prose > * + *{margin-top:1.05em}
.prose h2{
  margin-top:1.9em;
  padding-top:.6em;
  border-top:1px solid var(--c-paper-300);
  font-size:clamp(22px,2.6vw,30px);
  line-height:1.25;
  letter-spacing:-.01em;
}
.prose h3{
  margin-top:1.6em;
  font-size:18px;
  line-height:1.35;
  letter-spacing:0;
}
.prose h4{margin-top:1.4em;font-size:16px;letter-spacing:0}
.prose ul,.prose ol{padding-left:1.4em;list-style:disc}
.prose ol{list-style:decimal}
.prose li + li{margin-top:.35em}
.prose a{
  color:var(--c-graphite-800);
  border-bottom:1px solid var(--c-amber-500);
  transition:background-color var(--dur) var(--ease);
}
.prose a:hover{background:rgba(227,155,58,.22)}
.prose blockquote{
  padding-left:16px;
  border-left:3px solid var(--c-amber-500);
  color:var(--c-slate-500);
}
.prose code{
  font-family:var(--font-mono);
  font-size:.9em;
  letter-spacing:.02em;
  padding:.1em .4em;
  background:var(--c-paper-300);
}
.prose hr{
  border:0;
  border-top:1px solid var(--c-paper-300);
  margin-block:2em;
}

/* ---------- panels ---------- */
.panel{
  padding:var(--gap);
  border:1px solid var(--c-paper-300);
  background:var(--c-paper-100);
}
.panel--tint{background:var(--c-paper-300)}
.panel--dark{
  background:var(--c-ink-900);
  border-color:var(--c-ink-700);
  color:var(--c-paper-100);
}
.panel--dark .kicker{color:var(--c-crt-400)}

/* ---------- micro type ---------- */
.kicker{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  line-height:1.5;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--c-amber-500);
}
.mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.05em;
}
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:2px 8px;
  border:1px solid currentColor;
  font-family:var(--font-mono);
  font-size:11px;
  line-height:1.6;
  letter-spacing:.08em;
}
.status{
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--c-ink-700);
}
.status__dot{
  width:7px;
  height:7px;
  flex:none;
  background:var(--c-crt-400);
  box-shadow:0 0 0 1px rgba(20,58,49,.45);
}
.status--warn{color:var(--c-rust-600)}
.status--warn .status__dot{background:var(--c-rust-600)}

/* ---------- media shells ---------- */
.media{
  position:relative;
  display:block;
  width:100%;
  overflow:hidden;
  border:1px solid var(--c-paper-300);
  background-color:var(--c-paper-300);
  background-image:repeating-linear-gradient(135deg,rgba(20,58,49,.10) 0 10px,rgba(20,58,49,.03) 10px 20px);
}
.media img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media--wide{aspect-ratio:16/9}
.media--square{aspect-ratio:1/1}
.media--tall{aspect-ratio:3/4}
.media--card{aspect-ratio:4/3}
.media__caption{
  margin-top:8px;
  font-family:var(--font-mono);
  font-size:11px;
  line-height:1.6;
  letter-spacing:.06em;
  color:var(--c-slate-500);
}

/* ---------- injected UI ---------- */
.scroll-progress{
  position:fixed;
  top:0;
  left:0;
  z-index:120;
  width:0;
  height:3px;
  background:var(--c-amber-500);
  pointer-events:none;
}
.to-top{
  position:fixed;
  right:16px;
  bottom:16px;
  z-index:100;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 14px;
  border:1px solid var(--c-amber-500);
  background:var(--c-ink-900);
  color:var(--c-amber-200);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(6px);
  transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease),visibility var(--dur) var(--ease),background-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.to-top[data-visible]{
  opacity:1;
  visibility:visible;
  transform:translateY(0);
}
.to-top:hover,
.to-top:focus-visible{background:var(--c-amber-500);color:var(--c-ink-900)}

/* ---------- scroll lock ---------- */
html[data-nav-open]{overflow:hidden}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1120px){
  .nav-primary{gap:1rem}
  .nav-link{font-size:13px}
}

@media (max-width:980px){
  .nav-toggle{display:inline-flex;position:relative;z-index:2}
  .nav-primary{
    position:fixed;
    top:0;
    right:0;
    bottom:0;
    z-index:1;
    display:flex;
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    gap:0;
    width:min(88vw,360px);
    padding:88px var(--gutter) 40px;
    overflow-y:auto;
    background:var(--c-ink-900);
    border-left:1px solid var(--c-amber-500);
    transform:translateX(100%);
    visibility:hidden;
    transition:transform var(--dur) var(--ease),visibility var(--dur) var(--ease);
  }
  .nav-primary[data-open]{
    transform:translateX(0);
    visibility:visible;
  }
  .nav-primary__set{
    display:flex;
    flex-direction:column;
    gap:0;
    width:100%;
    padding-block:14px;
    border-bottom:1px solid rgba(220,205,178,.16);
  }
  .nav-primary__set:first-child{padding-top:0}
  .nav-primary__legend{
    display:block;
    margin-bottom:8px;
    font-family:var(--font-mono);
    font-size:11px;
    line-height:1.6;
    letter-spacing:.22em;
    color:var(--c-amber-500);
  }
  .nav-link{
    display:block;
    width:100%;
    padding:9px 0;
    font-size:15px;
  }
  .nav-link::after{display:none}
  .nav-link[aria-current="page"]{
    padding-left:12px;
    border-left:2px solid var(--c-amber-500);
    color:var(--c-amber-500);
  }
  .nav-cta{
    width:100%;
    margin-top:22px;
    padding-block:12px;
  }
}

@media (max-width:1080px){
  .site-footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:720px){
  .site-header__inner{min-height:62px;padding-block:8px;gap:12px}
  .brand{padding-left:10px;border-left-width:2px}
  .brand__mark{font-size:18px;letter-spacing:.08em}
  .brand__meta{font-size:10px;letter-spacing:.08em}
  .nav-toggle{padding:6px 10px;font-size:11px}
  .skip-link{left:12px}
  .to-top{right:12px;bottom:12px;padding:8px 12px;font-size:11px}
}

@media (max-width:620px){
  .site-footer__grid{grid-template-columns:minmax(0,1fr);gap:28px}
  .footer-bar__inner{justify-content:flex-start}
  .footer-note{max-width:none}
}

@media (max-width:420px){
  .nav-toggle__label{display:none}
}

/* ---------- 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;
  }
  .to-top{transform:none}
}