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

:root{
  --ink:#1f2617;
  --ink2:#161b10;
  --lime:#80ff00;
  --green:#00ff00;
  --paper:#eaffcf;
  --dim:#a7c191;
  --line:rgba(128,255,0,.34);
}

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

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

body{
  margin:0;
  font-family:Karla,"PingFang SC","Microsoft YaHei",-apple-system,"Segoe UI",sans-serif;
  font-size:17px;
  line-height:1.65;
  color:var(--paper);
  background-color:var(--ink);
  background-image:
    radial-gradient(circle,rgba(128,255,0,.20) 1.1px,transparent 1.1px),
    radial-gradient(circle,rgba(0,255,0,.13) 1px,transparent 1px);
  background-size:24px 24px,60px 60px;
  background-position:0 0,12px 17px;
  overflow-x:hidden;
}

img{max-width:100%;height:auto;display:block;border-radius:4px}
a{color:var(--lime)}
:focus-visible{outline:2px solid var(--paper);outline-offset:2px}

/* ---------- 左侧固定竖排页头 ---------- */

.hdr{
  position:sticky;
  top:0;
  z-index:40;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px 10px;
  padding:10px 14px 12px;
  background:var(--ink);
  border-bottom:3px solid var(--lime);
  box-shadow:0 10px 0 -7px var(--green);
}

.mark{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:6px 2px;
  font-family:"Playfair Display SC",Georgia,"Songti SC",serif;
  font-size:1.45rem;
  line-height:1;
  letter-spacing:.03em;
  color:var(--lime);
  text-decoration:none;
  transform:rotate(-2deg);
}
.mark span{border-bottom:3px solid var(--green);padding-bottom:2px}

.nav{
  order:3;
  flex:1 1 100%;
  min-width:0;
}
.nav p{
  display:flex;
  gap:6px;
  margin:0;
  padding:2px 0 4px;
  overflow-x:auto;
  scrollbar-width:none;
}
.nav p::-webkit-scrollbar{display:none}

.nav a{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  gap:7px;
  min-height:42px;
  padding:0 12px;
  border:1px solid var(--line);
  border-radius:4px;
  background:rgba(128,255,0,.07);
  color:var(--paper);
  font-size:.94rem;
  font-weight:600;
  text-decoration:none;
  white-space:nowrap;
  transition:background .15s ease,color .15s ease,transform .15s ease;
}
.nav a::before{
  content:"▸";
  font-size:.78em;
  color:var(--green);
  transform:rotate(-8deg);
}
.nav a:nth-child(even)::before{content:"✦"}
.nav a:hover,
.nav a:focus-visible{
  background:var(--lime);
  color:var(--ink);
  transform:rotate(-1.6deg);
}
.nav a:hover::before,
.nav a:focus-visible::before{color:var(--ink)}

.cta{
  margin-left:auto;
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 15px;
  border-radius:4px;
  background:var(--lime);
  box-shadow:3px 3px 0 var(--green);
  color:var(--ink);
  font-weight:700;
  font-size:.95rem;
  text-decoration:none;
  white-space:nowrap;
  transform:rotate(1.6deg);
}

/* ---------- 主区 ---------- */

.shell{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:30px;
  max-width:1240px;
  margin:0 auto;
  padding:0 16px 54px;
}

.hero{
  display:flex;
  flex-direction:column;
  justify-content:center;
  min-height:45vh;
  padding:clamp(26px,6vw,54px) 0 clamp(16px,4vw,28px);
  text-align:center;
}

.hero h1{
  margin:0;
  font-family:"Playfair Display SC",Georgia,"Songti SC",serif;
  font-weight:700;
  font-size:clamp(2.35rem,7.4vw,5.4rem);
  line-height:1.06;
  letter-spacing:.004em;
  overflow-wrap:break-word;
  transform:rotate(-1.2deg);
  text-shadow:4px 4px 0 rgba(0,255,0,.26);
}

.doc > div{
  padding:clamp(24px,4vw,42px) 0;
  border-top:1px dashed var(--line);
  scroll-margin-top:138px;
  animation:rise .55s ease both;
}
.doc > div:nth-child(1){animation-delay:.03s}
.doc > div:nth-child(2){animation-delay:.09s}
.doc > div:nth-child(3){animation-delay:.15s}
.doc > div:nth-child(4){animation-delay:.21s}
.doc > div:nth-child(5){animation-delay:.27s}
.doc > div:nth-child(6){animation-delay:.33s}
.doc > div:nth-child(7){animation-delay:.39s}
.doc > div:nth-child(n+8){animation-delay:.45s}

@keyframes rise{
  from{opacity:0;transform:translateY(14px)}
  to{opacity:1;transform:none}
}

.doc h2{
  margin:0 0 .5em;
  font-family:"Playfair Display SC",Georgia,"Songti SC",serif;
  font-weight:700;
  font-size:clamp(1.55rem,3.6vw,2.5rem);
  line-height:1.18;
  color:var(--lime);
  transform-origin:left center;
}
.doc > div:nth-of-type(even) h2{color:var(--green);transform:rotate(-1deg)}

.doc h3{
  margin:1.5em 0 .45em;
  font-size:clamp(1.14rem,2.2vw,1.45rem);
  line-height:1.35;
  color:var(--green);
}

.doc p{margin:0 0 1em}
.doc p:last-child{margin-bottom:0}

.doc a{
  text-decoration:underline;
  text-decoration-thickness:2px;
  text-underline-offset:3px;
}
.doc a:hover{background:var(--lime);color:var(--ink);text-decoration:none}

.doc strong{color:#ffffff;background:rgba(128,255,0,.22);padding:0 .12em;border-radius:2px}

.doc ul,.doc ol{padding-left:1.35em;margin:0 0 1em}
.doc li{margin:.36em 0}
.doc li::marker{color:var(--green)}

.doc blockquote{
  margin:1.3em 0;
  padding:15px 18px;
  border-left:4px solid var(--lime);
  border-radius:4px;
  background:rgba(128,255,0,.08);
  transform:rotate(-.5deg);
}

.doc figure{margin:1.3em 0}
.doc figcaption{font-size:.86rem;color:var(--dim);margin-top:.4em}

.doc table{width:100%;border-collapse:collapse;margin:1.2em 0;font-size:.95rem}
.doc th,.doc td{padding:9px 10px;text-align:left;border-bottom:1px solid var(--line)}
.doc th{color:var(--lime)}

.doc code{
  font-family:"SFMono-Regular",Consolas,"Liberation Mono",monospace;
  font-size:.9em;
  background:var(--ink2);
  padding:.1em .35em;
  border-radius:3px;
}

/* ---------- 右侧附栏 ---------- */

.rail{
  display:flex;
  flex-direction:column;
  align-items:flex-start;
  gap:14px;
}

.note{
  position:relative;
  width:100%;
  padding:15px 18px;
  border-radius:4px;
  background:var(--lime);
  color:var(--ink);
  box-shadow:4px 4px 0 rgba(0,255,0,.5);
  transform:rotate(-2deg);
  animation:jit 6s ease-in-out infinite;
}
.note::after{
  content:"✳";
  position:absolute;
  top:1px;
  right:8px;
  font-size:1.1rem;
  line-height:1;
  color:rgba(31,38,23,.42);
}
.note:nth-child(2){
  background:var(--green);
  transform:rotate(2.4deg);
  animation-name:jit2;
  animation-delay:-2.4s;
}

.railH{
  margin:0;
  font-family:"Playfair Display SC",Georgia,"Songti SC",serif;
  font-size:1.12rem;
  line-height:1.25;
  letter-spacing:.03em;
}
.railH span{display:inline-block}

@keyframes jit{
  0%,100%{transform:rotate(-2deg) translateY(0)}
  50%{transform:rotate(-1.1deg) translateY(-4px)}
}
@keyframes jit2{
  0%,100%{transform:rotate(2.4deg) translateY(0)}
  50%{transform:rotate(1.3deg) translateY(-4px)}
}

.jump{
  display:inline-flex;
  align-items:center;
  min-height:42px;
  padding:0 16px;
  border:2px dashed rgba(128,255,0,.6);
  border-radius:999px;
  color:var(--lime);
  font-size:.9rem;
  font-weight:700;
  text-decoration:none;
}
.jump:hover,
.jump:focus-visible{background:var(--lime);color:var(--ink);border-style:solid}

/* ---------- 页脚 ---------- */

.ftr{
  margin-top:14px;
  padding:26px 16px 30px;
  border-top:3px solid var(--lime);
  background:var(--ink2);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:16px 22px;
}

.ftrBrand{order:1}
.big{
  margin:0;
  font-family:"Playfair Display SC",Georgia,"Songti SC",serif;
  font-size:clamp(2rem,7vw,4.4rem);
  line-height:.9;
  color:var(--lime);
  text-shadow:3px 3px 0 rgba(0,255,0,.3);
  transform:rotate(-1.6deg);
}

.ftrNav{order:2}
.ftrNav p{
  display:flex;
  flex-wrap:wrap;
  gap:2px 12px;
  margin:0;
}
.ftrNav a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:0 4px;
  color:var(--dim);
  font-size:.88rem;
  text-decoration:none;
}
.ftrNav a:hover,
.ftrNav a:focus-visible{color:var(--lime)}

.cp{
  order:3;
  flex:1 1 100%;
  margin:0;
  padding-top:10px;
  text-align:center;
  font-size:.82rem;
  letter-spacing:.08em;
  color:var(--dim);
}

/* ---------- 桌面：页头变左侧固定竖排 ---------- */

@media (min-width:900px){
  body{padding-left:274px}

  .hdr{
    position:fixed;
    inset:0 auto 0 0;
    width:274px;
    flex-wrap:nowrap;
    flex-direction:column;
    align-items:stretch;
    gap:16px;
    padding:26px 20px 22px;
    overflow-y:auto;
    border-bottom:0;
    border-right:3px solid var(--lime);
    box-shadow:none;
  }

  .mark{order:1;align-self:flex-start;font-size:2rem}

  .nav{order:2;flex:1 1 auto}
  .nav p{
    flex-direction:column;
    overflow:visible;
    gap:6px;
    padding:0;
  }
  .nav a{width:100%}

  .cta{order:3;margin-left:0;justify-content:center}

  .shell{
    grid-template-columns:minmax(0,1fr) 248px;
    gap:46px;
    padding:0 30px 72px;
  }

  .rail{
    position:sticky;
    top:26px;
    align-self:start;
  }

  .doc > div{scroll-margin-top:26px}

  .ftr{padding:32px 30px 36px;flex-wrap:nowrap}
  .cp{flex:0 0 auto;padding-top:0;text-align:center;min-width:150px}
}

@media (min-width:1280px){
  .doc > div{padding:52px 0}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001s !important;
    animation-iteration-count:1 !important;
    transition-duration:.001s !important;
  }
}

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