@import url('https://fonts.googleapis.com/css2?family=Press+Start+2P&family=VT323&display=swap');

:root{
  --neon:#87ff71;
  --yel:#ffce5c;
  --ink:#192617;
  --ink2:#22331f;
  --paper:#f3ffe8;
  --dim:#a4c194;
  --head:'Press Start 2P','VT323',"PingFang SC","Hiragino Sans GB","Microsoft YaHei",monospace;
  --body:'VT323',"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
}

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

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

body{
  margin:0;
  background-color:var(--ink);
  background-image:radial-gradient(rgba(135,255,113,.14) 1px,transparent 1px);
  background-size:22px 22px;
  color:#e4ffd6;
  font:21px/1.65 var(--body);
  overflow-x:hidden;
}

body.menu-open{overflow:hidden}

a{color:var(--yel);text-decoration:none}
a:hover,a:focus-visible{color:var(--neon)}
img{display:block;max-width:100%;height:auto}

h1,h2,h3,h4{
  font-family:var(--head);
  line-height:1.42;
  letter-spacing:.01em;
  margin:0;
}

h2{font-size:20px;color:var(--neon);margin:0 0 10px}
h3{font-size:17px;color:var(--yel);margin:24px 0 8px}

hr{
  border:0;
  height:6px;
  margin:0 0 16px;
  background:repeating-linear-gradient(90deg,var(--neon) 0 10px,transparent 10px 18px);
}

/* 顶部 */
.site-head{
  position:relative;
  z-index:30;
  background:var(--ink);
  border-bottom:3px dashed rgba(255,206,92,.55);
}

.head-bar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  max-width:1240px;
  margin:0 auto;
  padding:8px 14px;
  min-height:64px;
}

.nav-l p,.nav-r p{display:flex;align-items:center;gap:2px;margin:0;flex-wrap:wrap}

.nav-l a,.nav-r a{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:8px 9px;
  font-size:17px;
  letter-spacing:.05em;
  color:#d8f6c5;
  border-bottom:2px solid transparent;
}

.nav-l a:hover,.nav-r a:hover{
  color:var(--ink);
  background:var(--neon);
  border-bottom-color:var(--yel);
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--head);
  font-size:15px;
  color:var(--neon);
  white-space:nowrap;
  transform:rotate(-1.5deg);
}

.brand-dot{
  width:0;height:0;
  border-left:7px solid transparent;
  border-right:7px solid transparent;
  border-bottom:13px solid var(--yel);
}

.burger{
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:44px;
  padding:8px 12px;
  font:inherit;
  font-size:17px;
  color:var(--ink);
  background:var(--yel);
  border:2px solid var(--ink);
  box-shadow:4px 4px 0 rgba(135,255,113,.85);
  cursor:pointer;
  transform:rotate(-2deg);
}

.burger-bars{
  width:20px;height:12px;
  background:repeating-linear-gradient(180deg,var(--ink) 0 3px,transparent 3px 6px);
}

/* 粘性锚点条 */
.dock{
  position:sticky;
  top:0;
  z-index:25;
  background:#10190e;
  border-bottom:2px solid var(--neon);
  overflow-x:auto;
  scrollbar-width:none;
}

.dock::-webkit-scrollbar{display:none}

.dock nav p{
  display:flex;
  align-items:center;
  gap:4px;
  width:max-content;
  margin:0;
  padding:6px 12px;
}

.dock a{
  display:inline-flex;
  align-items:center;
  min-height:36px;
  padding:5px 13px;
  font-size:16px;
  white-space:nowrap;
  color:#cfe9c0;
  border:2px solid transparent;
}

.dock a:hover,.dock a.is-on{
  background:var(--neon);
  color:var(--ink);
  border-color:var(--ink);
}

/* 主体 */
.main{
  max-width:1240px;
  margin:0 auto;
  padding:0 14px;
}

.hero{
  position:relative;
  display:flex;
  align-items:center;
  min-height:45vh;
  padding:34px 4px 40px;
  overflow:hidden;
  border-bottom:3px solid var(--yel);
}

.hero-in{position:relative;z-index:2;max-width:760px}

.badge{
  display:inline-block;
  padding:7px 13px;
  font-size:17px;
  letter-spacing:.1em;
  color:var(--ink);
  background:var(--yel);
  border:2px solid var(--ink);
  box-shadow:5px 5px 0 rgba(135,255,113,.7);
  transform:rotate(-3deg);
}

.hero-h1{
  margin:16px 0 16px;
  font-size:clamp(26px,5vw,50px);
  color:var(--paper);
  text-shadow:5px 5px 0 rgba(135,255,113,.35);
  max-width:22ch;
}

.hero-lead{
  margin:0;
  max-width:52ch;
  font-size:20px;
  color:#cfe9c0;
}

.hero-blob{position:absolute;z-index:1;pointer-events:none}

.b1{
  width:124px;height:124px;
  top:12%;right:6%;
  background:var(--neon);
  clip-path:polygon(50% 0,100% 100%,0 100%);
  mix-blend-mode:screen;
  animation:tip 8s ease-in-out infinite;
}

.b2{
  width:86px;height:86px;
  right:24%;bottom:8%;
  background:var(--yel);
  clip-path:polygon(50% 0,100% 50%,50% 100%,0 50%);
  opacity:.7;
  animation:spin 12s linear infinite;
}

.hero-squig{
  position:absolute;
  right:3%;top:58%;
  width:140px;height:22px;
  background:repeating-linear-gradient(90deg,var(--neon) 0 8px,transparent 8px 17px);
  transform:rotate(-8deg);
  opacity:.55;
}

@keyframes tip{
  0%,100%{transform:rotate(12deg) translateY(0)}
  50%{transform:rotate(24deg) translateY(-12px)}
}

@keyframes spin{
  0%{transform:rotate(0)}
  100%{transform:rotate(360deg)}
}

.cols{
  display:grid;
  grid-template-columns:minmax(0,1fr) 296px;
  gap:36px;
  align-items:start;
  padding:24px 0 44px;
}

.col-main{min-width:0}
.col-main div{
  scroll-margin-top:118px;
  padding:26px 0 10px;
  border-top:3px dashed rgba(135,255,113,.22);
}

.col-main div:first-child{border-top:0;padding-top:6px}

.col-main h2{font-size:clamp(19px,2.6vw,25px);margin:0 0 10px}
.col-main p{margin:0 0 16px;max-width:64ch}
.col-main ul,.col-main ol{margin:0 0 18px;padding-left:24px;max-width:64ch}
.col-main li{margin:7px 0}
.col-main li::marker{color:var(--yel)}
.col-main strong{color:var(--paper)}
.col-main img{margin:0 0 18px;border:3px solid var(--neon)}

.col-main blockquote{
  margin:0 0 18px;
  padding:14px 16px;
  background:var(--ink2);
  border-left:6px solid var(--yel);
  box-shadow:6px 6px 0 rgba(255,206,92,.22);
}

.col-main table{width:100%;border-collapse:collapse;margin:0 0 18px;font-size:19px}
.col-main th,.col-main td{border:2px dashed rgba(135,255,113,.34);padding:8px 10px;text-align:left}
.col-main th{background:var(--ink2);color:var(--yel)}

/* 侧栏 */
.side{
  position:sticky;
  top:70px;
  padding:16px;
  background:var(--ink2);
  border:3px solid var(--neon);
  box-shadow:8px 8px 0 rgba(255,206,92,.42);
  transform:rotate(.6deg);
}

.side h2{font-size:15px;color:var(--yel);margin:0 0 10px}

.side-nav p{display:flex;flex-direction:column;gap:2px;margin:0 0 14px}

.side-nav a{
  display:block;
  padding:9px 6px;
  min-height:40px;
  font-size:17px;
  color:#d6f2c4;
  border-bottom:2px dotted rgba(135,255,113,.32);
}

.side-nav a:hover{background:var(--neon);color:var(--ink)}

.totop{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:42px;
  padding:8px 14px;
  font-size:16px;
  color:var(--ink);
  background:var(--yel);
  border:2px solid var(--ink);
  box-shadow:4px 4px 0 rgba(135,255,113,.7);
}

.totop:hover{background:var(--neon);color:var(--ink)}

/* 页脚 */
.foot{
  margin-top:18px;
  background:#10190e;
  border-top:3px dashed var(--yel);
}

.foot-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  flex-wrap:wrap;
  max-width:1240px;
  margin:0 auto;
  padding:16px 14px;
}

.foot-brand{font-size:14px}
.foot nav p{display:flex;flex-wrap:wrap;gap:2px;margin:0}

.foot nav a{
  display:inline-flex;
  align-items:center;
  min-height:42px;
  padding:8px 10px;
  font-size:16px;
  color:#bfdcb0;
}

.copy{margin:0;font-size:16px;color:var(--dim)}

/* 全屏菜单 */
.mega{
  position:fixed;
  inset:0;
  z-index:60;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:22px;
  padding:26px;
  background-color:var(--ink);
  background-image:repeating-linear-gradient(45deg,rgba(135,255,113,.08) 0 18px,transparent 18px 36px);
  opacity:0;
  visibility:hidden;
  transition:opacity .25s ease,visibility .25s ease;
}

.mega.on{opacity:1;visibility:visible}

.mega-x{
  position:absolute;
  top:18px;right:18px;
  min-height:44px;
  padding:8px 16px;
  font:inherit;
  font-size:17px;
  color:var(--ink);
  background:var(--yel);
  border:2px solid var(--ink);
  box-shadow:4px 4px 0 var(--neon);
  cursor:pointer;
  transform:rotate(2deg);
}

.mega-nav p{display:flex;flex-direction:column;gap:12px;margin:0;text-align:center}

.mega-nav a{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:52px;
  padding:8px 24px;
  font-family:var(--head);
  font-size:15px;
  color:var(--neon);
  border:3px solid var(--neon);
  transform:rotate(-1deg);
}

.mega-nav a:nth-child(even){color:var(--yel);border-color:var(--yel);transform:rotate(1deg)}
.mega-nav a:hover{background:var(--neon);color:var(--ink);border-color:var(--ink)}

/* 断点 */
@media (max-width:1020px){
  .cols{grid-template-columns:minmax(0,1fr);gap:26px}
  .side{position:static;transform:none;order:2}
  .nav-l,.nav-r{display:none}
  .head-bar{justify-content:space-between}
  .brand{margin-right:auto}
}

@media (max-width:640px){
  body{font-size:20px}
  .main{padding:0 12px}
  .hero{min-height:44vh;padding:22px 2px 30px}
  .hero-h1{font-size:clamp(25px,8vw,34px);text-shadow:3px 3px 0 rgba(135,255,113,.4)}
  .hero-lead{font-size:18px}
  .b1{width:78px;height:78px;right:2%;top:8%}
  .b2{width:56px;height:56px;right:8%;bottom:6%}
  .hero-squig{display:none}
  .col-main h2{font-size:20px}
  .foot-row{flex-direction:column;align-items:flex-start;gap:8px}
  .mega-nav a{font-size:14px;min-height:48px;padding:6px 16px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
}

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