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

:root{
  --ink:#172617;
  --deep:#0a1310;
  --neon:#69ff69;
  --cyan:#00ffff;
  --paper:#e9fff1;
  --mut:#bfe4cd;
  --line:rgba(105,255,105,.24);
  --glass:linear-gradient(160deg, rgba(255,255,255,.13), rgba(0,255,255,.07) 46%, rgba(105,255,105,.10));
  --chrome:linear-gradient(135deg,#f6fffb,#a8dccd 28%,#edfffb 50%,#6fae9f 74%,#fdfffe);
  --r:28px;
  --font-d:"Amatic SC","Cabin","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-b:"Cabin","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}

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

html{
  scroll-behavior:smooth;
  background:var(--deep);
  -webkit-text-size-adjust:100%;
}

body{
  margin:0;
  font-family:var(--font-b);
  font-size:17px;
  line-height:1.78;
  color:var(--paper);
  background:
    radial-gradient(1100px 540px at 12% -8%, rgba(0,255,255,.17), transparent 62%),
    radial-gradient(900px 480px at 92% 2%, rgba(105,255,105,.16), transparent 60%),
    radial-gradient(700px 700px at 70% 90%, rgba(0,255,255,.08), transparent 70%),
    var(--deep);
  background-attachment:fixed;
  overflow-x:hidden;
}

img{max-width:100%;display:block}
a{color:var(--neon)}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:8px}
::selection{background:var(--neon);color:#06210c}

main [id]{scroll-margin-top:96px}

/* ------- 顶部霓虹坞 ------- */
.dock{
  position:fixed;
  inset:0 0 auto 0;
  z-index:60;
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:6px;
  padding:9px clamp(10px,3vw,26px);
  background:linear-gradient(180deg, rgba(11,25,18,.94), rgba(11,25,18,.74));
  border-bottom:1px solid rgba(0,255,255,.36);
  box-shadow:0 1px 0 rgba(105,255,105,.5) inset, 0 16px 34px -26px #000;
  backdrop-filter:blur(14px) saturate(1.35);
  -webkit-backdrop-filter:blur(14px) saturate(1.35);
}

.dock-list{
  display:flex;
  flex-wrap:wrap;
  gap:3px;
  margin:0;
  padding:0;
  list-style:none;
}
.dock-left{justify-content:flex-end}

.dock-list a{
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:44px;
  padding:0 11px;
  font-size:16px;
  line-height:1.2;
  color:#d3f3df;
  text-decoration:none;
  border-radius:999px;
  white-space:nowrap;
  transition:background .2s ease, color .2s ease, text-shadow .2s ease;
}
.dock-list a::before{
  content:"";
  width:8px;
  height:8px;
  flex:0 0 8px;
  border-radius:50%;
  background:radial-gradient(circle at 32% 30%, #ffffff, var(--cyan) 44%, var(--neon) 92%);
  box-shadow:0 0 9px rgba(0,255,255,.95);
}
.dock-list a:hover{background:rgba(0,255,255,.16);color:#fff;text-shadow:0 0 12px rgba(0,255,255,.85)}

.brand{
  font-family:var(--font-d);
  font-weight:700;
  font-size:clamp(26px,3.2vw,40px);
  line-height:1;
  letter-spacing:.06em;
  padding:0 14px;
  text-decoration:none;
  background:linear-gradient(180deg,#ffffff,#a6ffc6 46%,#12d6ba);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  filter:drop-shadow(0 0 10px rgba(105,255,105,.6));
}

.ping{
  border:1px solid rgba(255,255,255,.26);
  background:linear-gradient(180deg, rgba(255,255,255,.16), rgba(255,255,255,.04));
}
.ping::before{background:radial-gradient(circle at 32% 30%, #fff, var(--neon) 60%, #14a35c) !important}

/* ------- 首屏 ------- */
.hero{
  display:grid;
  grid-template-columns:1.12fr .88fr;
  align-items:center;
  gap:clamp(24px,4vw,52px);
  min-height:100vh;
  max-width:1180px;
  margin:0 auto;
  padding:clamp(96px,14vh,150px) clamp(18px,4vw,32px) 56px;
}

.hero-copy{
  display:flex;
  flex-direction:column;
  align-items:center;
  text-align:center;
  gap:20px;
  min-width:0;
}

.hero-title{
  margin:0;
  font-family:var(--font-d);
  font-weight:700;
  font-size:clamp(34px,6vw,68px);
  line-height:1.06;
  letter-spacing:.02em;
  color:#f4fff8;
  text-shadow:0 0 26px rgba(105,255,105,.45), 0 0 58px rgba(0,255,255,.28);
}

.lead{
  margin:0;
  max-width:34ch;
  font-size:17px;
  line-height:1.75;
  color:var(--mut);
}

.cta{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:50px;
  margin-top:4px;
  padding:0 34px;
  font-family:var(--font-b);
  font-weight:700;
  font-size:17px;
  letter-spacing:.08em;
  color:#06230f;
  text-decoration:none;
  border-radius:999px;
  border:1px solid rgba(255,255,255,.7);
  background:linear-gradient(180deg,#e2ffe8,#5df07a 52%,#17a54c);
  box-shadow:0 12px 26px -14px #17a54c, inset 0 1px 0 rgba(255,255,255,.9);
  transition:transform .18s ease, box-shadow .18s ease;
}
.cta:hover{transform:translateY(-2px);box-shadow:0 16px 32px -12px #26d27a, inset 0 1px 0 #fff}

.hero-media{
  margin:0;
  justify-self:center;
  width:100%;
  max-width:420px;
  aspect-ratio:1;
  overflow:hidden;
  border-radius:52% 30px 52% 30px / 30px 52% 30px 52%;
  border:1px solid rgba(0,255,255,.55);
  background:var(--chrome);
  box-shadow:0 0 0 6px rgba(0,255,255,.07), 0 30px 70px -34px #00ffff;
}
.hero-img{width:100%;height:100%;object-fit:cover}

.orb{
  display:block;
  width:100%;
  height:100%;
  background:
    radial-gradient(circle at 32% 28%, #ffffff, rgba(0,255,255,.85) 32%, rgba(105,255,105,.55) 62%, rgba(23,38,23,.2) 88%);
  animation:drift 9s ease-in-out infinite alternate;
}
@keyframes drift{
  from{transform:scale(1) rotate(0)}
  to{transform:scale(1.06) rotate(4deg)}
}

/* ------- 内容区 ------- */
.stage{
  display:grid;
  grid-template-columns:250px minmax(0,1fr);
  gap:clamp(24px,4vw,48px);
  max-width:1180px;
  margin:0 auto;
  padding:20px clamp(18px,4vw,32px) 80px;
}

.rail{
  display:flex;
  flex-direction:column;
  gap:16px;
  min-width:0;
}

.plate{
  padding:20px;
  border-radius:var(--r);
  border:1px solid rgba(255,255,255,.2);
  background:var(--glass);
  box-shadow:0 22px 46px -30px #000, inset 0 1px 0 rgba(255,255,255,.4);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}

.plate-title{
  margin:0 0 8px;
  font-family:var(--font-d);
  font-weight:700;
  font-size:26px;
  line-height:1.1;
  letter-spacing:.03em;
  color:#ffffff;
  text-shadow:0 0 16px rgba(0,255,255,.6);
}

.subtitle{
  margin:0;
  font-size:16px;
  line-height:1.65;
  color:var(--mut);
}

.rail-title{
  margin:0 0 10px;
  font-size:16px;
  font-weight:700;
  letter-spacing:.22em;
  color:var(--cyan);
  text-shadow:0 0 12px rgba(0,255,255,.5);
}

.jump-list{
  display:grid;
  gap:2px;
  margin:0;
  padding:0;
  list-style:none;
}
.jump-list a{
  display:flex;
  align-items:center;
  min-height:40px;
  padding:0 10px;
  font-size:16px;
  color:#dcf6e6;
  text-decoration:none;
  border-radius:14px;
  border:1px solid transparent;
  transition:background .18s ease, border-color .18s ease, color .18s ease;
}
.jump-list a:hover{background:rgba(0,255,255,.14);border-color:rgba(0,255,255,.45);color:#fff}

.column{
  counter-reset:sec;
  min-width:0;
  max-width:760px;
}

.column > div{
  counter-increment:sec;
  padding:42px 0 6px;
  border-top:1px dashed var(--line);
}
.column > div:first-child{border-top:0;padding-top:0}

.column > div::before{
  content:counter(sec,decimal-leading-zero);
  display:block;
  margin-bottom:8px;
  font-family:var(--font-d);
  font-size:30px;
  line-height:1;
  letter-spacing:.1em;
  color:var(--cyan);
  opacity:.8;
  text-shadow:0 0 16px rgba(0,255,255,.7);
}

.column h2{
  margin:0 0 14px;
  font-family:var(--font-d);
  font-weight:700;
  font-size:clamp(25px,3.2vw,36px);
  line-height:1.14;
  letter-spacing:.02em;
  color:#f2fff7;
  text-shadow:0 0 20px rgba(105,255,105,.38);
}
.column h3{
  margin:26px 0 10px;
  font-size:20px;
  line-height:1.35;
  color:#e6ffee;
}

.column p{margin:0 0 1.05em;color:#d9f2e4}
.column ul,.column ol{padding-left:1.3em;margin:0 0 1.1em}
.column li{margin:0 0 .45em}
.column li::marker{color:var(--cyan)}

.column a{
  color:var(--neon);
  text-decoration:underline;
  text-decoration-thickness:2px;
  text-underline-offset:3px;
}
.column a:hover{color:#fff;text-shadow:0 0 12px rgba(105,255,105,.8)}

.column img{
  margin:18px 0;
  border-radius:24px;
  border:1px solid rgba(255,255,255,.22);
  box-shadow:0 24px 48px -30px #000;
}

.column figure{margin:22px 0;padding:0}
.column figcaption{font-size:16px;color:var(--mut);margin-top:8px}

.column blockquote,.column aside{
  margin:22px 0;
  padding:18px 20px;
  border-radius:var(--r);
  border:1px solid rgba(0,255,255,.3);
  border-left:4px solid var(--neon);
  background:var(--glass);
  color:#e2f8ea;
}
.column blockquote p:last-child,.column aside p:last-child{margin-bottom:0}

.column table{width:100%;border-collapse:collapse;margin:18px 0;font-size:16px}
.column th,.column td{padding:10px 12px;border:1px solid rgba(255,255,255,.18);text-align:left;vertical-align:top}
.column th{background:rgba(0,255,255,.12);color:#fff}

/* ------- 页脚 ------- */
.foot{
  display:grid;
  grid-template-columns:1.25fr 1fr;
  gap:30px clamp(24px,4vw,54px);
  padding:52px clamp(18px,4vw,32px) 26px;
  border-top:1px solid rgba(0,255,255,.34);
  background:linear-gradient(180deg, rgba(0,255,255,.07), rgba(105,255,105,.05) 60%, transparent);
}

.foot > div{min-width:0}

.mark{
  display:inline-block;
  font-family:var(--font-d);
  font-weight:700;
  font-size:32px;
  line-height:1;
  letter-spacing:.06em;
  text-decoration:none;
  background:linear-gradient(180deg,#ffffff,#a6ffc6 48%,#12d6ba);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  filter:drop-shadow(0 0 12px rgba(0,255,255,.5));
}

.foot-blurb{margin:12px 0 0;max-width:42ch;font-size:16px;line-height:1.7;color:var(--mut)}

.foot-links ol{
  display:flex;
  flex-wrap:wrap;
  gap:6px;
  margin:0;
  padding:0;
  list-style:none;
}
.foot-links a{
  display:inline-flex;
  align-items:center;
  min-height:42px;
  padding:0 14px;
  font-size:16px;
  color:#e8fff1;
  text-decoration:none;
  border:1px solid rgba(255,255,255,.2);
  border-radius:999px;
  background:linear-gradient(180deg, rgba(255,255,255,.1), rgba(255,255,255,.02));
  transition:border-color .18s ease, box-shadow .18s ease, color .18s ease;
}
.foot-links a:hover{border-color:var(--neon);color:#fff;box-shadow:0 0 18px -4px rgba(105,255,105,.9)}

.foot-form{grid-column:1 / -1}
.sub{display:flex;flex-wrap:wrap;gap:10px;margin:0}
.sub input{
  flex:1 1 240px;
  min-height:48px;
  padding:0 20px;
  font-family:var(--font-b);
  font-size:16px;
  color:#eafff3;
  border-radius:999px;
  border:1px solid rgba(0,255,255,.45);
  background:rgba(0,0,0,.34);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.16);
}
.sub input::placeholder{color:#8fc3a6}
.sub button{
  min-height:48px;
  padding:0 30px;
  font-family:var(--font-b);
  font-weight:700;
  font-size:16px;
  letter-spacing:.08em;
  color:#06230f;
  cursor:pointer;
  border-radius:999px;
  border:1px solid rgba(255,255,255,.72);
  background:linear-gradient(180deg,#e2ffe8,#5df07a 52%,#17a54c);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.9);
  transition:transform .18s ease;
}
.sub button:hover{transform:translateY(-2px)}

.copy{
  grid-column:1 / -1;
  margin:0;
  padding-top:16px;
  border-top:1px solid rgba(255,255,255,.12);
  font-size:16px;
  color:#97cbaf;
}

/* ------- 滚动揭示 ------- */
@keyframes rise{
  from{opacity:.001;transform:translateY(26px)}
  to{opacity:1;transform:none}
}

@media (prefers-reduced-motion:no-preference){
  @supports (animation-timeline: view()){
    .column > div,.plate,.foot > div,.foot > .copy{
      animation-name:rise;
      animation-timing-function:linear;
      animation-fill-mode:both;
      animation-timeline:view();
      animation-range:entry 4% cover 26%;
    }
  }
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .orb{animation:none}
}

/* ------- 断点 ------- */
@media (max-width:960px){
  .stage{grid-template-columns:210px minmax(0,1fr);gap:24px}
  .hero{grid-template-columns:1fr .8fr}
}

@media (max-width:820px){
  .dock{
    position:static;
    display:flex;
    flex-wrap:wrap;
    justify-content:center;
    padding:10px 12px 12px;
  }
  .brand{order:-1;flex:1 0 100%;text-align:center;padding:4px 0 8px}
  .dock-left,.dock-right{justify-content:center}
  .dock-list a{padding:0 9px;font-size:16px}

  main [id]{scroll-margin-top:18px}

  .hero{
    grid-template-columns:1fr;
    min-height:0;
    padding:26px 18px 44px;
    gap:28px;
  }
  .hero-media{max-width:280px}

  .stage{
    grid-template-columns:1fr;
    padding:16px 18px 60px;
  }
  .rail{flex-direction:row;flex-wrap:wrap}
  .rail .plate{flex:1 1 240px}

  .column > div{padding-top:34px}

  .foot{grid-template-columns:1fr;padding:40px 18px 24px;gap:26px}
  .foot-form{grid-column:1}
  .copy{grid-column:1}
}

@media (max-width:420px){
  .hero-title{font-size:34px}
  .dock-list a{min-height:44px;padding:0 8px}
  .foot-links a{padding:0 11px}
  .plate{padding:16px}
}

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