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

:root{
  --neon:#69ff69;
  --cyan:#00ffff;
  --ink:#0b160c;
  --bg:#172617;
  --dim:#9fc0a8;
  --chrome:linear-gradient(150deg,#ffffff 0%,#c9e7d6 18%,#8fb3a4 34%,#ffffff 48%,#7f9f92 62%,#d9ffe7 80%,#ffffff 100%);
  --chrome2:linear-gradient(90deg,#69ff69,#00ffff 40%,#ffffff 62%,#69ff69 80%,#00ffff);
}

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

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

body{
  margin:0;
  font-family:'Cabin',system-ui,-apple-system,'Segoe UI','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
  font-size:17px;
  line-height:1.72;
  color:#dff3e3;
  background:
    radial-gradient(60% 40% at 8% -6%, rgba(105,255,105,.22), transparent 62%),
    radial-gradient(52% 38% at 96% 2%, rgba(0,255,255,.18), transparent 60%),
    radial-gradient(72% 50% at 50% 108%, rgba(0,255,255,.10), transparent 65%),
    linear-gradient(180deg,#172617 0%,#122011 55%,#0c170d 100%);
  background-attachment:fixed;
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  opacity:.6;
  background-image:
    radial-gradient(1.6px 1.6px at 12% 18%, rgba(255,255,255,.85), transparent 100%),
    radial-gradient(1.4px 1.4px at 78% 12%, rgba(0,255,255,.9), transparent 100%),
    radial-gradient(1.8px 1.8px at 34% 68%, rgba(105,255,105,.8), transparent 100%),
    radial-gradient(1.4px 1.4px at 88% 74%, rgba(255,255,255,.7), transparent 100%),
    radial-gradient(1.3px 1.3px at 58% 38%, rgba(0,255,255,.7), transparent 100%);
}

a{color:#a6ffff}
img{max-width:100%}

:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}

.sr{
  position:absolute;
  width:1px;height:1px;
  padding:0;margin:-1px;
  overflow:hidden;
  clip-path:inset(50%);
  white-space:nowrap;
}

/* 顶栏 */
.bar{
  position:relative;
  z-index:3;
  display:flex;
  align-items:center;
  gap:10px;
  padding:10px 16px;
  border-bottom:1px solid rgba(105,255,105,.2);
  background:linear-gradient(180deg, rgba(0,255,255,.09), rgba(23,38,23,0));
}

.brand{
  display:flex;
  align-items:center;
  gap:10px;
  min-height:44px;
  text-decoration:none;
  color:#f0fff3;
  font-weight:700;
  letter-spacing:.06em;
}

.brand-txt{font-size:1.02rem;text-shadow:0 0 12px rgba(105,255,105,.6)}

.brand-dot{
  width:14px;height:14px;
  border-radius:50%;
  background:radial-gradient(circle at 34% 30%,#fff,#69ff69 55%,#116311);
  box-shadow:0 0 14px #69ff69;
}

.brand-ico{
  width:34px;height:34px;
  border-radius:50%;
  object-fit:cover;
  border:1px solid rgba(0,255,255,.6);
}

.fold{position:relative;margin-left:auto}

.fold summary{
  display:flex;
  align-items:center;
  gap:8px;
  min-height:44px;
  padding:0 15px;
  cursor:pointer;
  list-style:none;
  border-radius:999px;
  font-size:.95rem;
  color:#d9fffb;
  border:1px solid rgba(0,255,255,.55);
  background:linear-gradient(180deg, rgba(0,255,255,.22), rgba(0,255,255,.04));
  filter:drop-shadow(0 0 8px rgba(0,255,255,.35));
}

.fold summary::-webkit-details-marker{display:none}

.fold summary::after{
  content:"";
  width:8px;height:8px;
  border-right:2px solid #9dffff;
  border-bottom:2px solid #9dffff;
  rotate:45deg;
  margin-top:-3px;
}

.fold[open] summary::after{rotate:-135deg;margin-top:3px}
.fold[open] summary{background:linear-gradient(180deg, rgba(105,255,105,.34), rgba(0,255,255,.12))}

.fold-menu{
  position:absolute;
  right:0;
  top:calc(100% + 8px);
  z-index:9;
  margin:0;
  padding:8px;
  list-style:none;
  min-width:min(78vw,250px);
  border:1px solid rgba(0,255,255,.5);
  border-radius:20px;
  background:linear-gradient(180deg, rgba(25,48,30,.98), rgba(12,22,13,.98));
  box-shadow:0 22px 44px rgba(0,0,0,.55), inset 0 0 30px rgba(0,255,255,.1);
}

.fold-menu a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:0 14px;
  border-radius:14px;
  color:#ddfbe4;
  text-decoration:none;
  font-size:.97rem;
}

.fold-menu a:hover,.fold-menu a:focus-visible{background:rgba(105,255,105,.18);color:#fff}

.call{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 14px;
  border-radius:999px;
  text-decoration:none;
  font-size:.9rem;
  font-weight:600;
  color:#0c1c0d;
  background:linear-gradient(180deg,#b6ffb6,#69ff69 55%,#28d428);
  border:1px solid #b9ffb9;
  box-shadow:0 0 16px rgba(105,255,105,.5);
}

/* 头图 */
.hero{
  position:relative;
  z-index:1;
  max-width:1180px;
  margin:0 auto;
  padding:16px 16px 24px;
  display:grid;
  gap:20px;
  min-height:45vh;
  align-items:center;
}

.hero::before{
  content:"";
  position:absolute;
  inset:6px 8px;
  border-radius:34px;
  background:radial-gradient(70% 80% at 18% 8%, rgba(0,255,255,.14), transparent 65%);
  pointer-events:none;
}

.hero-copy{position:relative}

.stamp{
  display:inline-block;
  padding:5px 14px;
  border-radius:999px;
  font-size:.82rem;
  letter-spacing:.14em;
  color:#eafff2;
  border:1px solid rgba(105,255,105,.7);
  background:linear-gradient(120deg, rgba(105,255,105,.28), rgba(0,255,255,.28));
  rotate:-3deg;
  box-shadow:0 0 14px rgba(105,255,105,.5);
}

.hero h1{
  margin:.35em 0 .25em;
  font-size:clamp(2.15rem,7.4vw,4.1rem);
  line-height:1.07;
  letter-spacing:.01em;
  background:var(--chrome);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  filter:drop-shadow(0 2px 12px rgba(0,255,255,.45));
}

.hero-lede{
  max-width:34em;
  margin:0 0 1.1em;
  color:#c5e6cd;
  font-size:1rem;
}

.go{
  display:inline-flex;
  align-items:center;
  min-height:46px;
  padding:0 20px;
  border-radius:999px;
  text-decoration:none;
  font-weight:700;
  color:#08210a;
  background:linear-gradient(180deg,#d8fff0,#69ff69 50%,#00e0e0);
  border:1px solid #eafff5;
  box-shadow:0 0 22px rgba(0,255,255,.45);
}

.hero-art{
  position:relative;
  min-height:min(40vh,280px);
}

.tile{
  position:absolute;
  margin:0;
  overflow:hidden;
  aspect-ratio:4/5;
  border-radius:26px;
  border:1px solid rgba(0,255,255,.65);
  background:linear-gradient(150deg,#2b4632,#101c11);
  box-shadow:0 0 0 1px rgba(105,255,105,.3), 0 18px 38px rgba(0,0,0,.5);
}

.tile:empty{display:none}

.t1{width:66%;left:0;top:0;rotate:-2.5deg}
.t2{width:52%;right:0;bottom:0;rotate:3deg;opacity:.95}

.art-img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}

/* 粘性锚点条 */
.rail-nav{
  position:sticky;
  top:0;
  z-index:4;
  margin-top:4px;
  background:rgba(13,24,14,.94);
  border-top:1px solid rgba(0,255,255,.22);
  border-bottom:1px solid rgba(105,255,105,.28);
  backdrop-filter:blur(10px);
}

.rail-menu{
  display:flex;
  gap:6px;
  margin:0 auto;
  padding:6px 12px;
  max-width:1180px;
  list-style:none;
  overflow-x:auto;
  scrollbar-width:none;
}

.rail-menu::-webkit-scrollbar{display:none}

.rail-menu a{
  display:flex;
  align-items:center;
  min-height:40px;
  padding:0 12px;
  border-radius:999px;
  white-space:nowrap;
  font-size:.92rem;
  color:#c8f0d2;
  text-decoration:none;
  border:1px solid transparent;
}

.rail-menu a:hover{border-color:rgba(0,255,255,.5);color:#fff;background:rgba(0,255,255,.12)}

/* 主体栅格 */
main{position:relative;z-index:1}

.wrap{
  max-width:1180px;
  margin:0 auto;
  padding:24px 16px 40px;
  display:grid;
  gap:18px;
  grid-template-columns:1fr;
}

.side{
  order:2;
  align-self:start;
  padding:16px;
  border-radius:22px;
  border:1px solid rgba(0,255,255,.35);
  background:linear-gradient(180deg, rgba(0,255,255,.09), rgba(23,38,23,.55));
  box-shadow:inset 0 0 30px rgba(0,255,255,.07);
}

.side-h{
  margin:0 0 .1em;
  font-size:1.18rem;
  letter-spacing:.05em;
  background:var(--chrome2);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}

.side .subtitle{
  margin:0 0 14px;
  font-size:.86rem;
  letter-spacing:.1em;
  color:#9fe6b4;
}

.side-menu{
  list-style:none;
  margin:0 0 14px;
  padding:0;
  display:grid;
  gap:2px;
}

.side-menu a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:0 10px;
  border-bottom:1px dashed rgba(105,255,105,.22);
  color:#d6f7de;
  text-decoration:none;
  font-size:.95rem;
}

.side-menu a:hover{color:#fff;background:rgba(105,255,105,.12)}

.top-link{
  display:flex;
  align-items:center;
  justify-content:center;
  min-height:42px;
  border-radius:999px;
  text-decoration:none;
  font-weight:600;
  color:#0b1e0c;
  background:linear-gradient(180deg,#c7ffce,#69ff69);
  border:1px solid #d9ffe0;
}

.paper{
  order:1;
  padding:20px 16px 28px;
  border-radius:26px;
  border:1px solid rgba(105,255,105,.32);
  background:linear-gradient(180deg, rgba(22,38,24,.9), rgba(12,22,13,.96));
  box-shadow:inset 0 0 60px rgba(0,255,255,.06);
}

/* 正文 */
.body{font-size:1.02rem;color:#d9efdf}

.body > section{
  padding:26px 0 6px;
  scroll-margin-top:66px;
  border-top:1px dashed rgba(105,255,105,.22);
}

.body > section:first-child{border-top:0;padding-top:2px}

.body h2{
  margin:0 0 .45em;
  font-size:clamp(1.3rem,4.6vw,1.85rem);
  line-height:1.34;
  color:#f2fff5;
  text-shadow:0 0 16px rgba(0,255,255,.35);
}

.body h3{font-size:1.12rem;line-height:1.45;color:#d5ffd9}
.body p{margin:0 0 1em}
.body a{color:#98fbff;text-underline-offset:3px}
.body ul,.body ol{padding-left:1.3em;margin:0 0 1em}
.body li{margin:.3em 0}
.body strong{color:#b6ffc0}

.body img{
  height:auto;
  border-radius:14px;
  border:1px solid rgba(0,255,255,.4);
}

.body blockquote{
  margin:1.2em 0;
  padding:12px 16px;
  border-left:3px solid #69ff69;
  border-radius:0 14px 14px 0;
  background:rgba(105,255,105,.09);
}

html.js .body > section{
  opacity:0;
  translate:0 16px;
  transition:opacity .5s ease, translate .5s ease;
}

html.js .body > section.in{opacity:1;translate:0 0}

/* 页脚 */
.foot{
  position:relative;
  z-index:1;
  margin-top:44px;
  padding:34px 16px 22px;
  display:grid;
  gap:24px;
  grid-template-columns:1fr;
  border-top:1px solid rgba(105,255,105,.3);
  background:linear-gradient(180deg, rgba(0,255,255,.07), rgba(10,18,11,.96));
}

.f-logo{
  margin:0;
  font-size:clamp(1.5rem,6vw,2rem);
  font-weight:700;
  letter-spacing:.08em;
  background:var(--chrome);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  filter:drop-shadow(0 0 10px rgba(105,255,105,.5));
}

.f-cap{
  margin:0 0 8px;
  font-size:.82rem;
  letter-spacing:.16em;
  color:#8fdc9f;
}

.f-menu{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:2px;
  grid-template-columns:1fr 1fr;
}

.f-menu a{
  display:flex;
  align-items:center;
  min-height:40px;
  padding:0 6px;
  color:#d3f4da;
  text-decoration:none;
  font-size:.94rem;
  border-bottom:1px dashed rgba(105,255,105,.18);
}

.f-menu a:hover{color:#fff}

.subform{display:flex;gap:8px;flex-wrap:wrap}

.subform input{
  flex:1 1 150px;
  min-height:46px;
  padding:0 14px;
  border-radius:999px;
  border:1px solid rgba(0,255,255,.5);
  background:rgba(9,20,11,.8);
  color:#e8fff0;
  font-size:1rem;
}

.subform input::placeholder{color:#88a894}

.subform button{
  min-height:46px;
  padding:0 20px;
  border-radius:999px;
  border:1px solid #d6ffe6;
  font-size:1rem;
  font-weight:700;
  color:#08210a;
  background:linear-gradient(180deg,#d5fff0,#69ff69);
  cursor:pointer;
}

.f-end{
  grid-column:1/-1;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  padding-top:16px;
  border-top:1px solid rgba(105,255,105,.2);
}

.copy{margin:0;font-size:.9rem;color:#a7c8b0}

.f-extra{list-style:none;margin:0;padding:0}

.f-extra a{
  display:inline-flex;
  align-items:center;
  min-height:42px;
  padding:0 14px;
  border-radius:999px;
  border:1px solid rgba(105,255,105,.45);
  color:#d9ffdf;
  text-decoration:none;
  font-size:.9rem;
}

/* 断点 */
@media (min-width:820px){
  .bar{padding:12px 24px}
  .hero{grid-template-columns:1.02fr .98fr;gap:26px;padding:26px 24px 30px}
  .hero-art{min-height:min(46vh,360px)}
  .wrap{padding:28px 24px 48px}
  .foot{padding:40px 24px 24px}
}

@media (min-width:900px){
  .wrap{grid-template-columns:250px minmax(0,1fr);gap:26px;align-items:start}
  .side{order:1;position:sticky;top:64px}
  .paper{order:2;padding:28px 30px 36px}
  .foot{grid-template-columns:1.15fr .85fr;gap:24px 32px}
  .f-brand{grid-column:1;grid-row:1}
  .f-links{grid-column:2;grid-row:1}
  .f-form{grid-column:2;grid-row:2}
  .f-end{grid-column:1/-1}
}

@media (max-width:400px){
  .brand-txt{font-size:.96rem}
  .call{padding:0 11px;font-size:.86rem}
  .fold summary{padding:0 12px}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  html.js .body > section{opacity:1;translate:0 0;transition:none}
  .tile,.stamp{rotate:0deg}
}

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