@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{
  --neon:#87ff71;
  --cyan:#01cdfe;
  --ink:#192617;
  --deep:#0a110a;
  --paper:#e2f6dc;
  --dim:#a7c2a1;
  --line:rgba(135,255,113,.24);
  --font-b:"Karla","Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  --font-d:"Playfair Display SC",Georgia,"Songti SC",serif;
}

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

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

body{
  margin:0;
  overflow-x:clip;
  font-family:var(--font-b);
  font-size:17px;
  line-height:1.68;
  color:var(--paper);
  background-color:var(--deep);
  background-image:
    radial-gradient(110% 60% at 12% -8%, rgba(1,205,254,.26), transparent 62%),
    radial-gradient(95% 55% at 96% 2%, rgba(135,255,113,.2), transparent 60%),
    linear-gradient(180deg,#0a110a 0%,#162014 46%,#0a110a 100%);
  background-repeat:no-repeat;
  padding-bottom:calc(98px + env(safe-area-inset-bottom));
  -webkit-font-smoothing:antialiased;
}

body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:5;
  pointer-events:none;
  opacity:.45;
  background:repeating-linear-gradient(180deg,rgba(0,0,0,.3) 0 1px,transparent 1px 3px);
}

img{max-width:100%;height:auto;display:block}
a{color:var(--cyan)}
p{margin:0 0 1em}
menu{list-style:none;margin:0;padding:0}
dl,dd{margin:0}

h1,h2,h3{font-family:var(--font-d);font-weight:400;letter-spacing:.01em;margin:0}

/* ---------- 底部固定条 ---------- */
.dock{
  position:fixed;
  left:0;right:0;bottom:0;
  z-index:40;
  padding:8px 10px calc(8px + env(safe-area-inset-bottom));
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(11,18,11,.86),rgba(8,13,8,.98));
  box-shadow:0 -16px 44px rgba(1,205,254,.14);
  backdrop-filter:blur(10px);
}

.dock-inner{
  display:flex;
  align-items:center;
  gap:4px;
  max-width:1160px;
  margin:0 auto;
  overflow-x:auto;
  overflow-y:hidden;
  scrollbar-width:none;
}
.dock-inner::-webkit-scrollbar{display:none}

.dock-btn{
  flex:0 0 auto;
  list-style:none;
  display:flex;
  align-items:center;
  min-height:44px;
  padding:0 12px;
  border:1px solid var(--line);
  border-radius:4px;
  color:var(--neon);
  font-size:16px;
  cursor:pointer;
  text-shadow:0 0 10px rgba(135,255,113,.6);
}
.dock-btn::-webkit-details-marker{display:none}

.dock-menu{display:flex;gap:2px;flex:0 0 auto}
.dock-left{margin-left:auto}
.dock-right{margin-right:auto}

.dock-menu a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:0 9px;
  border-radius:4px;
  font-size:16px;
  color:#d8eed2;
  text-decoration:none;
  white-space:nowrap;
}
.dock-menu a::before{
  content:"";
  flex:0 0 auto;
  width:7px;height:7px;
  margin-right:8px;
  border:1px solid var(--cyan);
  transform:rotate(45deg);
  box-shadow:0 0 9px var(--cyan);
}
.dock-menu a:hover,
.dock-menu a:focus-visible{color:#fff;background:rgba(1,205,254,.16);outline:none}
.dock-menu a.is-on{color:var(--neon);background:rgba(135,255,113,.16)}

.brand{
  flex:0 0 auto;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  min-height:44px;
  padding:4px 16px;
  text-decoration:none;
  border-left:1px solid rgba(1,205,254,.22);
  border-right:1px solid rgba(1,205,254,.22);
}
.brand-mark{font-size:16px;line-height:1;color:var(--cyan)}
.brand-name{
  font-family:var(--font-d);
  font-size:16px;
  line-height:1.2;
  letter-spacing:.04em;
  color:var(--neon);
  text-shadow:0 0 12px rgba(135,255,113,.65);
}

.dock-cta{
  flex:0 0 auto;
  display:flex;
  align-items:center;
  min-height:44px;
  padding:0 14px;
  margin-left:8px;
  border-radius:4px;
  font-size:16px;
  font-weight:700;
  color:#0a110a;
  text-decoration:none;
  background:linear-gradient(100deg,var(--neon),var(--cyan));
  box-shadow:0 0 22px rgba(1,205,254,.4);
}

/* ---------- 主体 ---------- */
.page{
  max-width:1160px;
  margin:0 auto;
  padding:0 18px 34px;
}

.doc{min-width:0}

.hero{
  position:relative;
  display:flex;
  flex-direction:column;
  gap:16px;
  min-height:56vh;
  padding:13vh 0 26px;
  overflow:hidden;
  border-bottom:1px solid var(--line);
  margin-bottom:26px;
}
.hero::before{
  content:"";
  position:absolute;
  left:-10%;right:-10%;bottom:0;
  height:44%;
  pointer-events:none;
  opacity:.5;
  transform:perspective(300px) rotateX(64deg);
  transform-origin:bottom center;
  background-image:
    linear-gradient(rgba(1,205,254,.4) 1px, transparent 1px),
    linear-gradient(90deg, rgba(1,205,254,.26) 1px, transparent 1px);
  background-size:100% 34px, 46px 100%;
  mask-image:linear-gradient(180deg,transparent,#000 55%);
  -webkit-mask-image:linear-gradient(180deg,transparent,#000 55%);
}

.hero-title{
  position:relative;
  z-index:1;
  font-size:clamp(2.1rem,7.6vw,4.6rem);
  line-height:1.06;
  letter-spacing:.02em;
  color:#f4ffe9;
  text-shadow:0 0 18px rgba(135,255,113,.5),0 0 46px rgba(1,205,254,.42);
}
.hero-title > span{position:relative;display:inline-block}
.hero-title::before,
.hero-title::after{
  content:attr(data-text);
  position:absolute;
  inset:0;
  z-index:-1;
  pointer-events:none;
}
.hero-title::before{color:var(--cyan);opacity:.6;transform:translate(-2px,1px);clip-path:inset(0 0 56% 0);animation:glitchA 5.6s steps(1) infinite}
.hero-title::after{color:var(--neon);opacity:.5;transform:translate(3px,-1px);clip-path:inset(58% 0 0 0);animation:glitchB 7.2s steps(1) infinite}

@keyframes glitchA{
  0%,90%,100%{transform:translate(-2px,1px)}
  92%{transform:translate(-9px,2px)}
  95%{transform:translate(4px,-2px)}
}
@keyframes glitchB{
  0%,88%,100%{transform:translate(3px,-1px)}
  90%{transform:translate(9px,1px)}
  94%{transform:translate(-5px,2px)}
}

.hero-sub{
  position:relative;
  z-index:1;
  max-width:44ch;
  margin:0;
  font-size:17px;
  color:#c6e2c0;
}

.hero-art{
  position:relative;
  z-index:1;
  margin:auto 0 0;
  border-radius:4px;
  overflow:hidden;
  box-shadow:0 0 0 1px rgba(1,205,254,.34),0 0 46px rgba(1,205,254,.24);
}
.hero-img{
  width:100%;
  height:clamp(180px,44vh,340px);
  object-fit:cover;
  filter:hue-rotate(-6deg) saturate(1.12);
  will-change:transform;
}

/* ---------- 正文 div ---------- */
.doc > div{scroll-margin-top:22px;scroll-margin-bottom:112px}

.doc > div:not(.hero){
  position:relative;
  margin:0 0 20px;
  padding:26px 20px 22px 24px;
  border-radius:4px;
  background:rgba(13,22,13,.74);
}
.doc > div:not(.hero)::before{
  content:"";
  position:absolute;
  left:0;top:24px;bottom:24px;
  width:2px;
  border-radius:2px;
  background:linear-gradient(180deg,var(--neon),var(--cyan));
  box-shadow:0 0 14px rgba(135,255,113,.55);
}

.doc h2{
  font-size:clamp(1.42rem,4.4vw,2rem);
  line-height:1.22;
  color:#f2ffe9;
  margin:.1em 0 .55em;
  text-shadow:0 0 16px rgba(1,205,254,.28);
}
.doc h2 > span{display:inline-block;border-bottom:1px solid rgba(1,205,254,.45);padding-bottom:.12em}
.doc h3{
  font-size:1.14rem;
  line-height:1.35;
  letter-spacing:.03em;
  color:var(--cyan);
  margin:1.2em 0 .4em;
}
.doc h3 > span{display:inline-block}

.doc p,.doc li{max-width:66ch}
.doc p{color:#d3e9cd;margin:0 0 1em}
.doc ul,.doc ol{padding-left:1.2em;margin:0 0 1.1em;color:#d3e9cd}
.doc li{margin:.3em 0}
.doc strong{color:#fff}
.doc a{color:var(--cyan);text-decoration:underline;text-underline-offset:3px}
.doc a:hover{color:var(--neon)}
.doc blockquote{
  margin:0 0 1.1em;
  padding:12px 16px;
  border-left:2px solid var(--cyan);
  background:rgba(1,205,254,.08);
  border-radius:4px;
  color:#e9ffe2;
}
.doc blockquote p:last-child{margin:0}
.doc hr{border:0;border-top:1px dashed var(--line);margin:22px 0}
.doc table{width:100%;border-collapse:collapse;margin:0 0 1.1em;font-size:16px}
.doc th,.doc td{padding:9px 10px;border-bottom:1px solid var(--line);text-align:left}
.doc th{color:var(--neon);font-weight:600}
.doc code{font-size:15px;color:var(--neon)}

/* ---------- 侧栏 ---------- */
.rail{
  margin:4px 0 26px;
  padding:16px 14px;
  border-radius:4px;
  background:rgba(9,16,9,.8);
  border-left:2px solid rgba(1,205,254,.5);
}
.rail-title{
  font-size:16px;
  letter-spacing:.22em;
  color:var(--cyan);
  margin:0 0 8px;
}
.rail-title > span{display:inline-block;text-shadow:0 0 12px rgba(1,205,254,.6)}
.rail-list a{
  display:block;
  padding:11px 2px;
  min-height:44px;
  font-size:16px;
  color:#cfe5c9;
  text-decoration:none;
  border-bottom:1px dashed rgba(135,255,113,.16);
}
.rail-list li:last-child a{border-bottom:0}
.rail-list a:hover{color:var(--neon)}
.rail-list a.is-on{color:var(--neon);text-shadow:0 0 10px rgba(135,255,113,.6)}

/* ---------- 页脚 ---------- */
.foot{
  max-width:1160px;
  margin:0 auto;
  padding:34px 18px 22px;
}
.foot-cols{
  display:grid;
  grid-template-columns:1.3fr 1fr 1fr;
  gap:12px;
  padding-top:24px;
  border-top:1px solid var(--line);
}
.foot dt{
  font-family:var(--font-d);
  font-size:16px;
  letter-spacing:.14em;
  color:var(--cyan);
  margin-bottom:6px;
}
.foot dd a{
  display:block;
  padding:10px 0;
  min-height:40px;
  font-size:16px;
  color:#d3e9cd;
  text-decoration:none;
}
.foot dd a:hover{color:var(--neon)}
.col-brand-name{
  font-family:var(--font-d);
  font-size:18px;
  color:var(--neon);
  text-shadow:0 0 14px rgba(135,255,113,.5);
}
.col-desc{font-size:16px;color:var(--dim);margin-top:4px;max-width:34ch}
.foot-bar{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:12px;
  margin-top:20px;
  padding-top:14px;
  border-top:1px dashed var(--line);
  font-size:16px;
  color:var(--dim);
}
.foot-bar p{margin:0}
.to-top a{
  display:inline-block;
  padding:10px 2px;
  min-height:40px;
  color:var(--cyan);
  text-decoration:none;
}
.to-top a:hover{color:var(--neon)}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .55s ease,transform .55s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- 断点 ---------- */
@media (min-width:880px){
  .page{
    display:grid;
    grid-template-columns:minmax(0,1fr) 244px;
    gap:42px;
    align-items:start;
    padding:0 24px 48px;
  }
  .rail{position:sticky;top:24px;margin:44px 0 0}
  .foot{padding:40px 24px 26px}
  .hero{padding-top:15vh}
  .hero-art{margin-top:auto}
}

@media (max-width:879px){
  .hero{min-height:0}
  .hero::before{height:52%}
}

@media (max-width:520px){
  .dock-menu a{padding:0 8px}
  .brand{padding:4px 10px}
  .dock-cta{padding:0 11px}
  .foot-cols{grid-template-columns:1.4fr 1fr 1fr;gap:10px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  body::after{opacity:.3}
  .hero-img{filter:hue-rotate(-6deg)}
}

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