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

:root{
  --acid:#80ff00;
  --lime:#00ff00;
  --ink:#1f2617;
  --ink-2:#272f1c;
  --ink-3:#333d22;
  --paper:#f2f8e6;
  --paper-dim:#c3d2a9;
  --line:rgba(128,255,0,.34);
  --head:'Outfit','Rubik',system-ui,-apple-system,'PingFang SC','Microsoft YaHei',sans-serif;
  --body:'Rubik',system-ui,-apple-system,'PingFang SC','Microsoft YaHei',sans-serif;
}

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

body{
  margin:0;
  background:var(--ink);
  color:var(--paper);
  font-family:var(--body);
  font-size:17px;
  line-height:1.68;
  overflow-x:hidden;
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:radial-gradient(rgba(128,255,0,.22) 1px,transparent 1px);
  background-size:15px 15px;
  opacity:.45;
}

h1,h2,h3,.brand-name,.foot-big,.tape-track,.eyebrow{font-family:var(--head);font-weight:700;letter-spacing:-.02em;line-height:1.1}
p{margin:0 0 12px}
a{color:var(--lime)}
img{display:block;max-width:100%;height:auto}
ul,ol{padding-left:20px}
:focus-visible{outline:3px solid var(--lime);outline-offset:2px}

.rail-wrap{position:relative;z-index:1}

/* 竖排导航：移动端先横过来 */
.rail{
  position:sticky;
  top:0;
  z-index:40;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  padding:10px 14px;
  background:rgba(31,38,23,.96);
  border-bottom:2px solid var(--acid);
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:44px;
  text-decoration:none;
  color:var(--paper);
}

.brand-mark{
  display:grid;
  place-items:center;
  width:34px;
  height:34px;
  border-radius:4px;
  background:var(--acid);
  color:var(--ink);
  font-family:var(--head);
  font-size:18px;
  font-weight:700;
  transform:rotate(-7deg);
  box-shadow:3px 3px 0 rgba(0,0,0,.45);
}

.brand-name{font-size:19px}

.rail-nav{order:3;width:100%}
.rail-nav p{display:flex;gap:7px;margin:0;overflow-x:auto;padding:2px 0 6px;-webkit-overflow-scrolling:touch}

.rail-nav a{
  display:inline-flex;
  align-items:center;
  gap:6px;
  min-height:42px;
  padding:8px 11px;
  border:1.5px solid var(--line);
  border-radius:4px;
  color:var(--paper);
  text-decoration:none;
  font-size:15px;
  white-space:nowrap;
  transition:background .18s,color .18s,transform .18s;
}

.rail-nav a i{font-style:normal;filter:saturate(150%)}
.rail-nav a:hover,.rail-nav a:focus-visible{background:var(--acid);border-color:var(--acid);color:var(--ink);transform:rotate(-1.5deg)}

.contact-chip{
  order:2;
  margin-left:auto;
  display:inline-flex;
  align-items:center;
  gap:6px;
  min-height:44px;
  padding:8px 13px;
  border-radius:4px;
  background:var(--lime);
  color:var(--ink);
  font-size:15px;
  font-weight:600;
  text-decoration:none;
  transform:rotate(-2deg);
  box-shadow:3px 3px 0 rgba(0,0,0,.45);
}

/* 主视觉 */
.hero{
  position:relative;
  display:grid;
  place-items:center;
  min-height:44vh;
  padding:34px 18px 54px;
  overflow:hidden;
  text-align:center;
  background:var(--ink-2);
  clip-path:polygon(0 0,100% 0,100% 92%,0 100%);
}

.hero-figure{position:absolute;inset:0;margin:0;z-index:0}
.hero-figure img{width:100%;height:100%;object-fit:cover;opacity:.42;filter:saturate(160%) contrast(1.08)}
.hero::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:1;
  background:linear-gradient(180deg,rgba(31,38,23,.75),rgba(31,38,23,.35) 55%,rgba(31,38,23,.9));
}

.hero-copy{position:relative;z-index:2;max-width:36rem;animation:rise .6s ease-out both}

.eyebrow{
  display:inline-block;
  margin:0 0 14px;
  padding:6px 12px;
  background:var(--lime);
  color:var(--ink);
  font-size:13px;
  letter-spacing:.08em;
  transform:rotate(-2deg);
  box-shadow:3px 3px 0 rgba(0,0,0,.4);
}

.hero h1{
  margin:0 0 12px;
  font-size:clamp(30px,7.6vw,58px);
  color:var(--paper);
  text-shadow:0 0 22px rgba(128,255,0,.3);
}

.hero-lead{margin:0 auto;max-width:38ch;color:var(--paper-dim);font-size:16px;line-height:1.6}

/* 跑马灯色带 */
.tape{
  overflow:hidden;
  background:var(--acid);
  color:var(--ink);
  border-block:2px solid var(--ink);
}

.tape-track{
  display:flex;
  width:max-content;
  font-size:14px;
  letter-spacing:.06em;
  padding:7px 0;
  animation:marquee 26s linear infinite;
}

.tape-track span{white-space:nowrap;padding-right:8px}

/* 正文舞台 */
main{display:block}

.stage{
  display:grid;
  gap:22px;
  max-width:1160px;
  margin:0 auto;
  padding:24px 18px 10px;
}

.stick{
  margin:0 0 4px;
  width:fit-content;
  padding:9px 14px;
  background:var(--lime);
  color:var(--ink);
  border:2px solid var(--ink);
  border-radius:4px;
  font-size:14px;
  font-weight:600;
  transform:rotate(-2.5deg);
  box-shadow:5px 5px 0 rgba(0,0,0,.5);
  animation:jitter 5s ease-in-out infinite;
}

.content{
  min-width:0;
  font-size:17px;
}

.content section{
  padding-block:6px 26px;
  margin-bottom:22px;
  border-bottom:2px dashed var(--line);
  scroll-margin-top:118px;
}

.content section:last-child{border-bottom:0}

.content h2{
  margin:30px 0 2px;
  font-size:clamp(22px,4.4vw,32px);
  color:var(--acid);
}

.content h2::before{
  content:"";
  display:inline-block;
  width:12px;
  height:12px;
  margin-right:9px;
  background:var(--lime);
  border-radius:2px;
  transform:rotate(12deg);
  vertical-align:2px;
}

.content .subtitle,.subtitle{
  margin:0 0 14px;
  color:var(--paper-dim);
  font-size:15px;
  line-height:1.6;
}

.content h3{margin:22px 0 6px;font-size:19px;color:var(--lime)}
.content p{max-width:66ch}
.content a{color:var(--lime);text-decoration-thickness:1.5px;text-underline-offset:3px}
.content a:hover{background:var(--acid);color:var(--ink);text-decoration:none}
.content ul,.content ol{margin:0 0 16px}
.content li{margin-bottom:6px;max-width:64ch}

.content blockquote{
  margin:20px 0;
  padding:14px 16px;
  background:var(--ink-3);
  border-left:4px solid var(--acid);
  border-radius:4px;
  color:var(--paper);
  transform:rotate(-.5deg);
}

.content blockquote p:last-child{margin-bottom:0}

.content table{
  width:100%;
  display:block;
  overflow-x:auto;
  border-collapse:collapse;
  margin:16px 0;
  font-size:15px;
}

.content th,.content td{border:1px solid var(--line);padding:8px 10px;text-align:left}
.content th{background:var(--ink-3);color:var(--lime)}
.content time{color:var(--paper-dim);font-size:14px}

/* 侧栏 */
.side{
  align-self:start;
  padding:16px;
  background:var(--ink-2);
  border:2px solid var(--line);
  border-bottom:4px solid var(--acid);
  border-radius:4px;
  scroll-margin-top:118px;
}

.side-title{margin:0 0 2px;font-size:19px;color:var(--acid)}
.side-list{list-style:none;margin:0;padding:0}

.side-list a{
  display:flex;
  align-items:center;
  min-height:42px;
  padding:7px 10px;
  margin-bottom:6px;
  border:1.5px solid var(--line);
  border-radius:4px;
  color:var(--paper);
  text-decoration:none;
  font-size:15px;
  transition:background .18s,color .18s,transform .18s;
}

.side-list a:hover,.side-list a:focus-visible{background:var(--acid);border-color:var(--acid);color:var(--ink);transform:translateX(3px)}

.side-tip{margin:12px 0 0;font-size:14px;color:var(--paper-dim)}

/* 页脚：四个分区直挂 footer */
.foot{
  display:grid;
  grid-template-columns:1fr;
  gap:16px;
  margin-top:36px;
  padding:32px 18px 24px;
  background:var(--ink-2);
  border-top:3px solid var(--acid);
}

.foot-top{
  display:flex;
  flex-wrap:wrap;
  gap:6px 18px;
  align-items:baseline;
  justify-content:space-between;
}

.foot-big{margin:0;font-size:clamp(24px,6.4vw,42px);color:var(--acid)}
.foot-big.ghost{color:transparent;-webkit-text-stroke:1.4px var(--acid);transform:rotate(-1deg)}

.foot section{
  padding:14px;
  background:rgba(128,255,0,.055);
  border:1.5px solid var(--line);
  border-bottom:4px solid var(--acid);
  border-radius:4px;
}

.f-title{margin:0 0 2px;font-size:17px;color:var(--lime)}
.foot .subtitle{margin:0 0 9px;font-size:14px}
.foot p{font-size:15px;line-height:1.62;margin:0 0 9px}
.foot p:last-child{margin-bottom:0}

.f-links{display:flex;flex-wrap:wrap;gap:6px}

.f-links a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:6px 10px;
  border:1.5px solid var(--line);
  border-radius:4px;
  color:var(--paper);
  text-decoration:none;
  font-size:14px;
}

.f-links a:hover,.f-links a:focus-visible{background:var(--acid);border-color:var(--acid);color:var(--ink)}

.sub-form{display:grid;gap:7px}
.sub-form label{font-size:14px;color:var(--paper-dim)}

.sub-form input{
  width:100%;
  min-height:44px;
  padding:9px 11px;
  background:var(--ink);
  border:1.5px solid var(--line);
  border-radius:4px;
  color:var(--paper);
  font-family:var(--body);
  font-size:16px;
}

.sub-form input::placeholder{color:#8e9c7a}

.sub-form button{
  min-height:44px;
  padding:9px 14px;
  background:var(--lime);
  color:var(--ink);
  border:2px solid var(--ink);
  border-radius:4px;
  font-family:var(--head);
  font-size:16px;
  font-weight:700;
  cursor:pointer;
  transition:transform .15s;
}

.sub-form button:hover{transform:rotate(-1.5deg) scale(1.02)}

.f-jump a{display:inline-flex;align-items:center;min-height:40px;color:var(--lime);font-weight:600}

.foot-base{
  display:flex;
  flex-wrap:wrap;
  gap:8px 16px;
  justify-content:space-between;
  align-items:center;
  padding-top:14px;
  border-top:2px dashed var(--line);
  font-size:14px;
  color:var(--paper-dim);
}

.foot-base p{margin:0}

.foot-back{display:flex;gap:12px;flex-wrap:wrap}
.foot-back a{display:inline-flex;align-items:center;min-height:40px;color:var(--paper);text-decoration:none;border-bottom:1.5px solid var(--acid)}
.foot-back a:hover{color:var(--acid)}

/* 平板 / 桌面 */
@media (min-width:720px){
  .foot{grid-template-columns:repeat(2,minmax(0,1fr))}
  .foot-top,.foot-base{grid-column:1 / -1}
}

@media (min-width:900px){
  .rail{
    position:fixed;
    inset:0 auto 0 0;
    width:236px;
    flex-wrap:nowrap;
    flex-direction:column;
    align-items:flex-start;
    padding:24px 18px 20px;
    border-bottom:0;
    border-right:2px dashed var(--line);
    overflow-y:auto;
  }

  .rail-wrap{padding-left:236px}
  .brand{min-height:0}

  .rail-nav{order:0;width:100%;margin-top:22px}
  .rail-nav p{flex-direction:column;overflow:visible;gap:7px;padding:0}
  .rail-nav a{width:100%;font-size:16px}

  .contact-chip{order:0;margin:auto 0 0;width:100%;justify-content:center;min-height:48px}

  .hero{min-height:45vh;padding:52px 26px 76px}
  .stage{padding:30px 26px 14px}
  .foot{padding:40px 26px 26px}
}

@media (min-width:1000px){
  .stage{grid-template-columns:minmax(0,1fr) 294px;align-items:start;gap:30px}
  .stick{grid-column:1 / -1}
  .side{grid-column:2;grid-row:2}
  .content{grid-column:1;grid-row:2}
}

@media (min-width:1120px){
  .foot{grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
  .foot section{grid-column:span 1}
}

@keyframes marquee{
  from{transform:translateX(0)}
  to{transform:translateX(-50%)}
}

@keyframes rise{
  from{opacity:0;transform:translateY(14px)}
  to{opacity:1;transform:translateY(0)}
}

@keyframes jitter{
  0%,92%,100%{transform:rotate(-2.5deg)}
  94%{transform:rotate(-1deg) translateX(2px)}
  96%{transform:rotate(-3.5deg) translateX(-2px)}
  98%{transform:rotate(-2deg)}
}

/* 首屏外的内容随滚动淡入（纯 CSS） */
@supports (animation-timeline:view()){
  .content section{
    animation:rise .01s linear both;
    animation-timeline:view();
    animation-range:entry 0% entry 22%;
  }
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001s !important;animation-iteration-count:1 !important;transition-duration:.001s !important}
  .tape-track{animation:none}
}

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