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

:root{
  --ink:#172617;
  --ink-deep:#0b1410;
  --ink-soft:#213b28;
  --neon:#69ff69;
  --cyan:#00ffff;
  --pink:#ff69b4;
  --line:rgba(105,255,105,.30);
  --line-soft:rgba(105,255,105,.16);
  --text:#e6ffe9;
  --muted:#a8cfb2;
  --chrome:linear-gradient(180deg,#ffffff 0%,#d6e6d8 34%,#8fa295 52%,#e8f6ea 68%,#9fb2a3 100%);
  --bubble:radial-gradient(circle at 32% 24%,#ffffff 0%,#ffc9e6 34%,#ff69b4 64%,#b93b83 100%);
  --font:'Poppins','Open Sans',system-ui,-apple-system,'Segoe UI','Microsoft YaHei',sans-serif;
}

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

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

body{
  margin:0;
  font-family:var(--font);
  font-size:17px;
  line-height:1.7;
  color:var(--text);
  overflow-x:hidden;
  background:
    radial-gradient(900px 520px at 10% -12%,rgba(105,255,105,.22),transparent 62%),
    radial-gradient(820px 500px at 90% 2%,rgba(0,255,255,.17),transparent 64%),
    radial-gradient(760px 440px at 46% 112%,rgba(255,105,180,.16),transparent 62%),
    var(--ink-deep);
  background-attachment:fixed;
}

img{max-width:100%;height:auto;display:block}
p{margin:0 0 1em}
a{color:var(--cyan)}

.sr{
  position:absolute;width:1px;height:1px;
  padding:0;margin:-1px;overflow:hidden;
  clip:rect(0 0 0 0);white-space:nowrap;border:0;
}

/* ---------- 顶栏：品牌居中，栏目分左右 ---------- */
.bar{
  position:sticky;top:0;z-index:60;
  background:linear-gradient(180deg,rgba(11,20,16,.97),rgba(11,20,16,.80));
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}
.bar-in{
  max-width:1180px;margin:0 auto;padding:10px 14px;
  display:grid;gap:10px;align-items:center;
  grid-template-columns:1fr auto 1fr;
  grid-template-areas:"l b r" "f f f";
}
.cluster{display:flex;align-items:center}
.cluster-l{grid-area:l;justify-self:start}
.cluster-r{grid-area:r;justify-self:end}
.brand{
  grid-area:b;justify-self:center;
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 10px;min-height:44px;
  text-decoration:none;
  font-weight:700;font-size:clamp(1.05rem,4.4vw,1.4rem);
  letter-spacing:.04em;
  color:var(--ink);
  background-image:var(--chrome);
  border:1px solid rgba(255,255,255,.75);
  box-shadow:0 0 20px rgba(105,255,105,.35),inset 0 1px 0 #fff;
  border-radius:999px;
  white-space:nowrap;
}
.brand-txt{text-shadow:0 1px 0 rgba(255,255,255,.6)}
.mark{width:30px;height:30px;border-radius:50%}

.pill{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:44px;padding:0 15px;
  font-family:inherit;font-size:16px;font-weight:600;line-height:1.2;
  color:#101d12;text-decoration:none;
  background-image:var(--chrome);
  border:1px solid rgba(255,255,255,.7);
  border-radius:999px;
  box-shadow:0 2px 0 #2c3f31,0 0 16px rgba(105,255,105,.22);
  cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,filter .18s ease;
}
.pill:hover,.pill:focus-visible{
  transform:translateY(-1px);
  filter:saturate(1.15) brightness(1.04);
  box-shadow:0 3px 0 #2c3f31,0 0 26px rgba(0,255,255,.55);
}
.pill:active{transform:translateY(1px);box-shadow:0 1px 0 #2c3f31}

.fold{position:relative}
.sum{list-style:none;gap:6px}
.sum::-webkit-details-marker{display:none}
.sum::after{content:"▾";font-size:11px;line-height:1}
details[open]>.sum{
  background-image:linear-gradient(180deg,var(--neon),var(--cyan));
  box-shadow:0 0 26px rgba(0,255,255,.6),inset 0 1px 0 #fff;
}

.menu{
  position:absolute;top:calc(100% + 10px);left:0;
  margin:0;padding:8px;list-style:none;
  min-width:212px;display:grid;gap:6px;
  background:rgba(12,24,17,.98);
  border:1px solid var(--neon);
  box-shadow:0 16px 34px rgba(0,0,0,.66),0 0 28px rgba(105,255,105,.3);
}
.cluster-r .menu{left:auto;right:0}
.menu .pill{width:100%;justify-content:flex-start}

.find{
  grid-area:f;
  display:grid;grid-template-columns:1fr auto;gap:8px;
  align-items:center;
}
.find input{
  width:100%;min-height:44px;padding:0 14px;
  font-family:inherit;font-size:16px;color:var(--text);
  background:rgba(105,255,105,.08);
  border:1px solid var(--line);
  border-radius:999px;
}
.find input::placeholder{color:var(--muted)}
.find input:focus-visible{outline:2px solid var(--cyan);outline-offset:1px}
.find .go{padding:0 20px;background-image:linear-gradient(180deg,var(--neon),var(--cyan))}

@media (min-width:900px){
  .bar-in{
    grid-template-columns:1fr auto 1fr auto;
    grid-template-areas:"l b r";
    padding:10px 18px;
  }
  .find{grid-area:r;justify-self:end;width:230px;margin-left:10px}
  .cluster-r{margin-right:10px}
}

/* ---------- 主区骨架 ---------- */
.stage{max-width:1180px;margin:0 auto;display:block}

.hero{
  position:relative;overflow:hidden;
  display:flex;align-items:center;
  min-height:45vh;
  padding:clamp(30px,6vw,54px) 16px clamp(26px,5vw,46px);
  border-bottom:2px solid var(--neon);
  background:
    radial-gradient(520px 260px at 8% 0%,rgba(255,105,180,.20),transparent 70%),
    radial-gradient(560px 300px at 92% 20%,rgba(0,255,255,.20),transparent 70%);
}
.hero-in{position:relative;z-index:2;width:100%;max-width:760px;text-align:left}

.spark{
  position:absolute;inset:0;z-index:1;pointer-events:none;
  background:
    radial-gradient(3px 3px at 78% 22%,#fff 40%,transparent 60%),
    radial-gradient(3px 3px at 62% 66%,var(--cyan) 40%,transparent 60%),
    radial-gradient(4px 4px at 88% 74%,var(--pink) 40%,transparent 60%),
    radial-gradient(2px 2px at 40% 14%,#fff 40%,transparent 60%);
  opacity:.85;
}

.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 14px}
.badge{
  display:inline-flex;align-items:center;min-height:34px;padding:0 13px;
  font-size:16px;font-weight:600;letter-spacing:.05em;
  color:#0b2313;
  background:linear-gradient(180deg,rgba(105,255,105,.95),rgba(0,255,255,.9));
  border-radius:999px;
  box-shadow:0 0 20px rgba(105,255,105,.5);
}
.badge-pink{
  background-image:var(--bubble);
  color:#28091b;
  box-shadow:0 0 20px rgba(255,105,180,.55);
}

h1{
  margin:0 0 14px;
  font-size:clamp(2rem,7.4vw,4.1rem);
  line-height:1.08;
  letter-spacing:-.01em;
  font-weight:700;
  color:#f4fff5;
  text-shadow:0 0 24px rgba(105,255,105,.55),0 0 60px rgba(0,255,255,.28);
}
.lede{
  max-width:56ch;margin:0 0 20px;
  font-size:clamp(1rem,2.4vw,1.14rem);
  color:#d3f2d7;
}
.hero-go{display:flex;flex-wrap:wrap;gap:12px;margin:0}
.cta{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:48px;padding:0 22px;
  font-size:16px;font-weight:700;text-decoration:none;
  color:#0b1f12;
  background-image:linear-gradient(180deg,var(--neon),var(--cyan));
  border:1px solid rgba(255,255,255,.8);
  border-radius:999px;
  box-shadow:0 0 24px rgba(0,255,255,.45),inset 0 1px 0 #fff;
  transition:transform .18s ease,box-shadow .18s ease;
}
.cta:hover,.cta:focus-visible{transform:translateY(-2px);box-shadow:0 0 34px rgba(105,255,105,.75)}
.cta-ghost{
  color:#eafff0;background-image:none;
  background-color:rgba(105,255,105,.10);
  border:1px solid var(--neon);
  box-shadow:none;
}

/* ---------- 双栏正文 ---------- */
.cols{
  display:grid;grid-template-columns:minmax(0,1fr);
  gap:30px;
  padding:clamp(26px,4vw,40px) 16px 52px;
}
@media (min-width:960px){
  .cols{grid-template-columns:minmax(0,1fr) 306px;gap:48px}
}

.doc{min-width:0}
.kicker{
  display:block;
  font-size:16px;font-weight:600;letter-spacing:.22em;
  color:var(--cyan);
  text-shadow:0 0 14px rgba(0,255,255,.5);
  margin-bottom:6px;
}
.doc-title{
  margin:0 0 12px;
  font-size:clamp(1.5rem,4vw,2.1rem);
  line-height:1.28;font-weight:600;color:#fff;
}
.doc-note{
  max-width:62ch;margin:0 0 18px;color:var(--muted);
  padding-bottom:18px;border-bottom:1px dashed var(--line-soft);
}

.doc article[id]{
  scroll-margin-top:132px;
  padding:26px 0;
  border-top:1px solid var(--line-soft);
}
.doc article[id]:first-of-type{border-top:0;padding-top:24px}

.doc h2{
  margin:0 0 12px;
  font-size:clamp(1.35rem,3.4vw,1.78rem);
  line-height:1.3;font-weight:600;color:#f2fff4;
  padding-bottom:10px;
  border-bottom:3px solid var(--neon);
  display:inline-block;
}
.doc h3{
  margin:24px 0 10px;
  font-size:1.12rem;font-weight:600;color:#d8ffdd;
}
.doc p,.doc li{max-width:64ch;color:#d7f4dc}
.doc ul,.doc ol{padding-left:1.25em;margin:0 0 1em}
.doc li{margin-bottom:.5em}
.doc a{color:var(--cyan);text-decoration-thickness:1px;text-underline-offset:3px}
.doc strong{color:#fff}
.doc blockquote{
  margin:0 0 1em;padding:14px 16px;
  border-left:4px solid var(--pink);
  background:rgba(255,105,180,.09);
}
.doc blockquote p:last-child{margin-bottom:0}
.doc img{margin:14px 0;border:1px solid var(--line)}

/* ---------- 侧栏 ---------- */
.rail{
  align-self:start;
  padding:18px;
  background:linear-gradient(180deg,rgba(105,255,105,.10),rgba(0,255,255,.05));
  border:1px solid var(--line);
  border-bottom:3px solid var(--cyan);
}
@media (min-width:960px){
  .rail{position:sticky;top:126px}
}
.rail-title{
  margin:0 0 10px;font-size:1.16rem;line-height:1.35;font-weight:600;color:#fff;
}
.rail-p{margin:0 0 14px;font-size:16px;color:var(--muted)}

.jump{list-style:none;margin:0 0 18px;padding:0;display:grid;gap:4px}
.jump-a{
  display:flex;align-items:center;gap:10px;
  min-height:44px;padding:6px 8px;
  text-decoration:none;color:#e9ffed;font-size:16px;
  border-bottom:1px solid var(--line-soft);
}
.jump-a .num{
  flex:none;
  font-weight:700;font-size:14px;letter-spacing:.06em;
  color:var(--neon);
}
.jump-a:hover,.jump-a:focus-visible{
  background:rgba(105,255,105,.14);
  color:#fff;
}

.chrome-box{
  padding:14px;
  background:linear-gradient(180deg,rgba(255,255,255,.10),rgba(255,255,255,.02));
  border:1px solid rgba(255,255,255,.24);
  border-bottom:3px solid var(--pink);
}
.chrome-box h3{margin:0 0 8px;font-size:1rem;color:#fff}
.chrome-box p{margin:0;font-size:16px;color:#cfe9d6}

.rail-fig{margin:16px 0 0}
.rail-fig img{border:1px solid var(--line)}

/* ---------- 页脚 ---------- */
.foot{
  border-top:2px solid var(--neon);
  background:linear-gradient(180deg,rgba(105,255,105,.09),rgba(11,20,16,.99));
  padding:38px 16px 26px;
}
.f-in{
  max-width:1180px;margin:0 auto;
  display:flex;flex-wrap:wrap;gap:28px;
  align-items:flex-start;justify-content:space-between;
}
.f-brand{flex:1 1 240px;min-width:0}
.f-logo{
  display:inline-block;
  font-size:clamp(1.6rem,5vw,2.6rem);
  font-weight:700;line-height:1.1;letter-spacing:-.02em;
  text-decoration:none;color:#f5fff6;
  text-shadow:0 0 22px rgba(105,255,105,.55);
  margin-bottom:10px;
}
.f-brand p{margin:0;max-width:42ch;font-size:16px;color:var(--muted)}

.f-nav{flex:1 1 240px;min-width:0}
.f-menu{
  list-style:none;margin:0;padding:0;
  display:flex;flex-wrap:wrap;gap:4px 14px;
}
.f-a{
  display:inline-flex;align-items:center;min-height:40px;
  font-size:16px;color:#d9f6de;text-decoration:none;
  border-bottom:1px solid transparent;
}
.f-a:hover,.f-a:focus-visible{color:var(--neon);border-bottom-color:var(--neon)}

.f-copy{
  flex:1 1 100%;
  display:flex;flex-wrap:wrap;gap:6px 18px;
  justify-content:space-between;align-items:center;
  padding-top:16px;border-top:1px solid var(--line-soft);
  font-size:16px;color:var(--muted);
}
.f-copy p{margin:0}
.f-copy a{color:var(--cyan);text-decoration:none;display:inline-flex;align-items:center;min-height:40px}
.f-copy a:hover,.f-copy a:focus-visible{color:var(--neon)}

/* ---------- 动效 ---------- */
[data-reveal]{
  opacity:0;transform:translateY(18px);
  transition:opacity .6s ease,transform .6s cubic-bezier(.2,.8,.2,1);
}
[data-reveal].is-in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  [data-reveal]{opacity:1;transform:none;transition:none}
  .pill,.cta{transition:none}
}

/* ---------- 窄屏收口 ---------- */
@media (max-width:599px){
  body{font-size:16px}
  .hero{min-height:auto}
  .hero-go .cta{flex:1 1 100%}
  .br-in{gap:8px}
  .foot{padding-top:30px}
  .f-copy{flex-direction:column;align-items:flex-start}
}

:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}

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