@import url('https://fonts.googleapis.com/css2?family=Exo+2:wght@300;400;500;600;700&family=Orbitron:wght@400;500;600;700&display=swap');

:root{
  --paper:#fafaf8;
  --grey:#4a4a4a;
  --ink:#1a1a1a;
  --soft:rgba(26,26,26,.16);
  --faint:rgba(26,26,26,.07);
  --glass:linear-gradient(155deg,rgba(255,255,255,.82),rgba(255,255,255,.44));
  --sans:'Exo 2',system-ui,-apple-system,'Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  --tech:'Orbitron','Exo 2',system-ui,-apple-system,'Noto Sans SC',sans-serif;
}

*,*::before,*::after{box-sizing:border-box}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}

body{
  margin:0;
  font-family:var(--sans);
  font-size:17px;
  line-height:1.75;
  color:var(--ink);
  background-color:var(--paper);
  background-image:
    linear-gradient(rgba(26,26,26,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(26,26,26,.035) 1px,transparent 1px);
  background-size:28px 28px,28px 28px;
  overflow-x:hidden;
}

body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:9;
  pointer-events:none;
  opacity:.12;
  mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.86' numOctaves='4' stitchTiles='stitch'/></filter><rect width='160' height='160' filter='url(%23n)'/></svg>");
}

img{max-width:100%;height:auto;display:block}
a{color:var(--ink)}

/* ---------- 页头 ---------- */
.site-head{
  max-width:1140px;
  margin:0 auto;
  padding:14px 18px 0;
  position:relative;
  z-index:3;
}

.brandrow{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  border-bottom:2px solid var(--ink);
  padding-bottom:8px;
}

.brand{
  font-family:var(--tech);
  font-weight:600;
  font-size:1.02rem;
  letter-spacing:.18em;
  text-decoration:none;
  color:var(--ink);
  padding:10px 0;
  display:inline-block;
  transform:rotate(-.6deg);
}

.totop{
  font-family:var(--tech);
  font-size:.74rem;
  letter-spacing:.2em;
  text-decoration:none;
  color:var(--grey);
  border:1px dashed var(--grey);
  border-radius:4px;
  padding:11px 10px;
  display:inline-block;
  transform:rotate(1.4deg);
}

.navrow{margin-top:9px}

details.navbox{display:block}

summary{
  list-style:none;
  cursor:pointer;
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--tech);
  font-size:.72rem;
  letter-spacing:.24em;
  padding:12px 14px;
  color:var(--ink);
  background:rgba(255,255,255,.6);
  border:2px solid var(--ink);
  border-radius:4px;
  transform:rotate(-.7deg);
  user-select:none;
}

summary::-webkit-details-marker{display:none}
summary::before{content:"";width:11px;height:11px;border-left:2px solid var(--ink);border-bottom:2px solid var(--ink);transform:rotate(-45deg) translate(2px,-2px)}
details[open] summary::before{transform:rotate(135deg) translate(0,0)}

menu.navlist{
  list-style:none;
  margin:10px 0 0;
  padding:0;
  display:flex;
  flex-wrap:wrap;
  gap:2px 6px;
}

menu.navlist a{
  display:inline-block;
  padding:11px 12px;
  font-size:.94rem;
  line-height:1.5;
  color:var(--grey);
  text-decoration:none;
  border-bottom:1px dashed var(--soft);
}

menu.navlist a:hover,
menu.navlist a:focus-visible{color:var(--ink);background:var(--faint)}

/* ---------- Hero ---------- */
.hero{
  max-width:1140px;
  margin:0 auto;
  padding:26px 18px 34px;
  min-height:60vh;
  display:flex;
  align-items:center;
  position:relative;
}

.hero-in{
  width:100%;
  display:flex;
  flex-direction:column;
  align-items:flex-start;
}

.tape{
  margin:0;
  font-family:var(--tech);
  font-size:.68rem;
  letter-spacing:.3em;
  color:var(--paper);
  background:var(--ink);
  padding:8px 13px;
  border-radius:4px;
  transform:rotate(-1.8deg);
  box-shadow:3px 4px 0 rgba(26,26,26,.13);
}

.hero h1{
  font-family:var(--tech);
  font-size:clamp(2rem,8.4vw,4.4rem);
  line-height:1.1;
  letter-spacing:.005em;
  font-weight:700;
  margin:.45em 0 .3em;
  max-width:17ch;
  transform:rotate(-.9deg);
  text-shadow:3px 3px 0 rgba(26,26,26,.09);
}

.dek{
  margin:0;
  max-width:44ch;
  color:var(--grey);
  font-size:.98rem;
  border-left:3px solid var(--soft);
  padding-left:12px;
  transform:rotate(.35deg);
}

.floats{
  margin:18px 0 0;
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}

.floats span{
  font-family:var(--tech);
  font-size:.65rem;
  letter-spacing:.2em;
  color:var(--grey);
  background:rgba(255,255,255,.66);
  border:1px dashed var(--grey);
  border-radius:4px;
  padding:8px 10px;
}

.floats span:nth-child(1){transform:rotate(2.4deg)}
.floats span:nth-child(2){transform:rotate(-2.6deg)}

/* ---------- 主体网格 ---------- */
main{
  max-width:1140px;
  margin:0 auto;
  padding:0 18px 46px;
}

.wrap{
  display:grid;
  grid-template-columns:1fr;
  gap:22px;
  align-items:start;
}

aside{
  background:var(--glass);
  border:1px solid var(--soft);
  border-radius:4px;
  padding:16px 14px 14px;
  backdrop-filter:blur(7px);
  -webkit-backdrop-filter:blur(7px);
  box-shadow:3px 3px 0 rgba(26,26,26,.06);
  transform:rotate(-.55deg);
}

aside h2{
  font-family:var(--tech);
  font-size:.72rem;
  letter-spacing:.22em;
  font-weight:600;
  color:var(--grey);
  margin:0 0 6px;
}

aside h2 span{border-bottom:1px dashed var(--soft);padding-bottom:3px;display:inline-block}

aside menu.jump{
  list-style:none;
  margin:0 0 14px;
  padding:0;
}

aside menu.jump a{
  display:block;
  padding:10px 2px;
  font-size:.9rem;
  line-height:1.5;
  text-decoration:none;
  color:var(--grey);
  border-bottom:1px dotted var(--soft);
}

aside menu.jump a:hover,
aside menu.jump a:focus-visible{color:var(--ink);background:var(--faint)}

aside p{margin:0;font-size:.84rem;color:var(--grey)}

.chip{
  display:inline-block;
  margin-top:4px;
  padding:4px 9px;
  border:1px dashed var(--grey);
  border-radius:4px;
  font-family:var(--tech);
  font-size:.64rem;
  letter-spacing:.14em;
}

/* ---------- 正文 ---------- */
.body{min-width:0}

article section{
  scroll-margin-top:18px;
  padding:28px 0 26px;
  border-top:2px dashed var(--soft);
}

article section:first-child{border-top:0;padding-top:6px}

article h2{
  font-family:var(--tech);
  font-size:clamp(1.22rem,4.4vw,1.62rem);
  line-height:1.35;
  font-weight:600;
  letter-spacing:.015em;
  margin:0 0 .7em;
  padding-left:16px;
  position:relative;
}

article h2::before{
  content:"";
  position:absolute;
  left:0;
  top:.18em;
  bottom:.18em;
  width:6px;
  background:var(--ink);
  border-radius:4px;
  transform:rotate(1.4deg);
}

div h2 span{
  display:inline-block;
  border-bottom:3px solid var(--faint);
  padding-bottom:2px;
}

div h3{
  font-family:var(--tech);
  font-size:1.05rem;
  font-weight:600;
  letter-spacing:.02em;
  margin:1.5em 0 .5em;
  color:var(--ink);
}

div h3 span{display:inline-block;border-bottom:2px dotted var(--grey);padding-bottom:1px}

div p{margin:0 0 1.05em;max-width:64ch}

div ul,
div ol{margin:0 0 1.15em;padding-left:1.3em;max-width:64ch}
div li{margin:.35em 0}
div li::marker{color:var(--grey);font-family:var(--tech)}

div strong{
  font-weight:600;
  background:linear-gradient(transparent 64%,rgba(26,26,26,.16) 64%);
}

div a{color:var(--ink)}
div a:hover{background:var(--faint)}

div blockquote{
  margin:1.3em 0;
  padding:14px 16px;
  background:var(--glass);
  border-left:4px solid var(--ink);
  border-radius:4px;
  backdrop-filter:blur(6px);
  -webkit-backdrop-filter:blur(6px);
  color:var(--grey);
  transform:rotate(-.4deg);
}

div blockquote p:last-child{margin-bottom:0}

div table{
  width:100%;
  border-collapse:collapse;
  font-size:.94rem;
  margin:0 0 1.2em;
}

div th,
div td{
  border-bottom:1px solid var(--soft);
  padding:9px 8px;
  text-align:left;
}

div th{font-family:var(--tech);font-size:.78rem;letter-spacing:.12em;color:var(--grey)}
div code{font-size:.92em;background:var(--faint);padding:1px 5px;border-radius:4px}
div hr{border:0;border-top:2px dashed var(--soft);margin:1.6em 0}

div figure{margin:1.2em 0}
div figcaption{font-size:.82rem;color:var(--grey);margin-top:.4em}
div img{border-radius:4px;filter:grayscale(1) contrast(1.04)}

/* ---------- 页脚 ---------- */
footer{
  max-width:1140px;
  margin:0 auto;
  padding:26px 18px 40px;
  border-top:3px solid var(--ink);
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:16px 14px;
}

footer .mark{
  grid-column:1/-1;
  margin:0;
  font-family:var(--tech);
  font-size:clamp(2rem,13vw,5rem);
  line-height:.96;
  letter-spacing:.02em;
  font-weight:700;
  color:rgba(26,26,26,.13);
  -webkit-text-stroke:1px rgba(26,26,26,.42);
  transform:rotate(-.7deg);
  word-break:break-word;
}

footer .fcol{margin:0;font-size:.9rem}

footer .fcol a{
  display:block;
  padding:11px 0;
  color:var(--grey);
  text-decoration:none;
  border-bottom:1px dotted var(--soft);
}

footer .fcol a:hover,
footer .fcol a:focus-visible{color:var(--ink);background:var(--faint)}

footer .cr{
  grid-column:1/-1;
  display:block;
  text-align:center;
  font-size:.78rem;
  letter-spacing:.08em;
  color:var(--grey);
  border-top:1px dashed var(--soft);
  padding-top:14px;
}

footer .cr a{color:var(--ink);text-decoration:none;border-bottom:1px solid var(--soft);padding:6px 2px;display:inline-block}

/* ---------- 动效 ---------- */
.rv{opacity:0;transform:translateY(12px) rotate(.25deg)}
.rv.in{
  opacity:1;
  transform:none;
  transition:opacity .3s steps(4,end),transform .3s steps(4,end);
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .rv{opacity:1;transform:none;transition:none}
}

/* ---------- 断点 ---------- */
@media (min-width:560px){
  .hero{min-height:66vh;padding-top:34px}
  .hero h1{max-width:16ch}
}

@media (min-width:760px){
  body{font-size:17.5px}
  footer{grid-template-columns:repeat(4,1fr);padding-top:34px}
  div article{padding:34px 0 30px}
}

@media (min-width:900px){
  .site-head{padding-top:20px}
  .hero{min-height:70vh;padding:44px 18px 52px}
  .floats{margin-top:22px}
  .wrap{grid-template-columns:214px minmax(0,1fr);gap:30px}
  aside{position:sticky;top:16px}
  div article:first-child{padding-top:10px}
}

@media (min-width:1080px){
  .hero h1{letter-spacing:-.005em}
}

button[aria-expanded]{min-width:44px;min-height:44px}