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

:root{
  --ink:#172617;
  --deep:#0c1810;
  --neon:#69ff69;
  --cyan:#00ffff;
  --pink:#ff6fc4;
  --paper:#e6ffee;
  --muted:#a9c9b4;
  --line:rgba(105,255,105,.28);
  --chrome:linear-gradient(140deg,#f6fff9 0%,#bcd9c7 18%,#ffffff 33%,#8fb3a2 49%,#eafff2 64%,#9fc7b4 81%,#f8fffb 100%);
  --iri:linear-gradient(115deg,var(--neon) 0%,var(--cyan) 46%,var(--pink) 82%,var(--neon) 100%);
  --sans:'Josefin Sans','PingFang SC','Hiragino Sans GB','Microsoft YaHei',system-ui,sans-serif;
  --serif:'Cinzel','Songti SC','SimSun',Georgia,serif;
}

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

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

body{
  margin:0;
  min-height:100vh;
  font-family:var(--sans);
  font-size:17px;
  line-height:1.75;
  color:var(--paper);
  background:
    radial-gradient(920px 540px at 88% -10%,rgba(0,255,255,.17),transparent 62%),
    radial-gradient(760px 500px at 3% 14%,rgba(105,255,105,.13),transparent 60%),
    radial-gradient(700px 620px at 52% 112%,rgba(255,111,196,.13),transparent 66%),
    var(--deep);
  background-attachment:fixed;
  overflow-x:clip;
}

img{display:block;max-width:100%}
a{color:var(--neon);text-decoration:none}
a:hover{color:var(--cyan)}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}

/* ---------- 顶部 ---------- */
.top{
  position:sticky;
  top:0;
  z-index:60;
  display:flex;
  align-items:center;
  gap:.9rem;
  padding:.7rem clamp(.85rem,3vw,2rem);
  background:linear-gradient(180deg,rgba(12,24,16,.94),rgba(12,24,16,.66));
  backdrop-filter:blur(14px) saturate(150%);
  border-bottom:1px solid var(--line);
  box-shadow:0 1px 0 rgba(0,255,255,.2),0 20px 44px -32px rgba(105,255,105,.85);
}

.brand{
  flex:0 0 auto;
  display:grid;
  place-items:center;
  width:46px;
  height:46px;
  border-radius:50%;
  background:var(--chrome);
  color:#0b1a10;
  box-shadow:0 0 0 1px rgba(255,255,255,.55),0 0 22px rgba(105,255,105,.55),inset 0 -4px 9px rgba(0,0,0,.28);
}
.brand-ico{width:30px;height:30px;object-fit:contain}
.brand-txt{
  font-family:var(--serif);
  font-size:.6rem;
  line-height:1.15;
  letter-spacing:.04em;
  text-align:center;
  padding:0 3px;
}

.menu{margin-inline:auto;min-width:0}
.menu ol{
  display:flex;
  flex-wrap:wrap;
  justify-content:flex-end;
  gap:.4rem;
  margin:0;
  padding:0;
  list-style:none;
}
.menu a{
  display:inline-flex;
  align-items:center;
  min-height:42px;
  padding:.2rem .85rem;
  font-size:.95rem;
  letter-spacing:.03em;
  color:#d9ffe3;
  border-radius:999px;
  border:1px solid rgba(105,255,105,.3);
  background:linear-gradient(160deg,rgba(255,255,255,.15),rgba(105,255,105,.06));
  box-shadow:inset 0 1px 0 rgba(255,255,255,.4);
  transition:color .2s,background .3s,box-shadow .25s,transform .25s,border-color .25s;
}
.menu a:hover,.menu a:focus-visible{
  color:#03130a;
  background:var(--iri);
  border-color:transparent;
  box-shadow:0 0 22px rgba(0,255,255,.75);
  transform:translateY(-1px);
}
.menu li:first-child a{
  font-weight:600;
  color:#fff;
  border-color:rgba(0,255,255,.55);
}

/* ---------- 主视觉 ---------- */
.hero{
  position:relative;
  isolation:isolate;
  min-height:70vh;
  display:grid;
  align-content:end;
  justify-items:end;
  padding:clamp(1.6rem,5vw,4.2rem);
  overflow:hidden;
  clip-path:polygon(0 0,100% 0,100% 94%,0 100%);
}

.hero-frame{
  position:absolute;
  inset:0;
  margin:0;
  z-index:-2;
  background:linear-gradient(135deg,#1d3a24,#123240 45%,#2c1533);
}
.hero-empty{background:linear-gradient(135deg,#1d3a24,#123240 42%,#33162f 78%,#101f16)}
.hero-img{width:100%;height:100%;object-fit:cover;filter:saturate(118%) contrast(104%)}

.hero-frame::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(255deg,rgba(12,24,16,.42) 6%,rgba(12,24,16,.9) 60%,rgba(12,24,16,.99) 100%);
}
.hero-frame::before{
  content:"";
  position:absolute;
  top:13%;
  right:8%;
  z-index:1;
  width:168px;
  height:168px;
  border-radius:50%;
  background:radial-gradient(circle at 32% 28%,rgba(255,255,255,.92),rgba(255,255,255,.16) 42%,rgba(0,255,255,.3) 69%,transparent 72%);
  box-shadow:0 0 46px rgba(0,255,255,.55);
  animation:drift 10s ease-in-out infinite;
}

.hero-blade{
  position:absolute;
  left:-12%;
  bottom:5%;
  z-index:1;
  width:132%;
  height:14px;
  transform:rotate(-3.4deg);
  background:var(--iri);
  filter:drop-shadow(0 0 16px rgba(0,255,255,.85));
}

.hero-copy{
  position:relative;
  z-index:2;
  max-width:40rem;
  text-align:right;
}
.hero-copy h1{
  margin:0;
  font-family:var(--serif);
  font-size:clamp(2.1rem,6.4vw,4.4rem);
  font-weight:700;
  line-height:1.12;
  letter-spacing:.01em;
  color:#f4fff8;
  text-shadow:0 0 26px rgba(105,255,105,.55),0 0 62px rgba(0,255,255,.38);
}

@keyframes drift{
  0%,100%{transform:translate3d(0,0,0) scale(1)}
  50%{transform:translate3d(-14px,18px,0) scale(1.06)}
}

/* ---------- 正文骨架 ---------- */
.doc{
  max-width:1180px;
  margin:clamp(2rem,5vw,4rem) auto;
  padding:0 clamp(1rem,3vw,2rem);
  display:grid;
  grid-template-columns:255px minmax(0,1fr);
  gap:clamp(1.2rem,3vw,2.6rem);
  align-items:start;
}

.side{
  position:sticky;
  top:88px;
  padding:1.1rem 1rem 1rem;
  border-radius:10px;
  border:1px solid var(--line);
  background:linear-gradient(165deg,rgba(255,255,255,.1),rgba(105,255,105,.05));
  backdrop-filter:blur(12px) saturate(140%);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.32),0 22px 44px -32px rgba(0,255,255,.95);
}
.side small{
  display:block;
  font-size:.72rem;
  letter-spacing:.2em;
  color:var(--cyan);
}
.side h2{
  margin:.15rem 0 .75rem;
  font-family:var(--serif);
  font-size:1.24rem;
  color:#eafff0;
}
.side ol{
  display:grid;
  gap:.12rem;
  margin:0;
  padding:0;
  list-style:none;
}
.side a{
  display:flex;
  align-items:center;
  min-height:40px;
  padding:.2rem .55rem;
  border-left:2px solid transparent;
  border-radius:0 8px 8px 0;
  color:#c9f4d6;
  font-size:.95rem;
  transition:background .2s,color .2s,border-color .2s;
}
.side a:hover,.side a:focus-visible{
  background:rgba(105,255,105,.13);
  border-left-color:var(--neon);
  color:#fff;
}

.prose{min-width:0;counter-reset:sec;overflow-wrap:break-word}
.prose > section{
  position:relative;
  counter-increment:sec;
  scroll-margin-top:96px;
  padding:1.5rem 0 2.1rem 3rem;
  border-top:1px dashed rgba(105,255,105,.24);
}
.prose > section:first-child{border-top:0;padding-top:.4rem}
.prose > section::before{
  content:counter(sec,decimal-leading-zero);
  position:absolute;
  left:.15rem;
  top:1.9rem;
  font-family:var(--serif);
  font-size:.92rem;
  letter-spacing:.06em;
  color:var(--cyan);
  text-shadow:0 0 14px rgba(0,255,255,.7);
}
.prose > section:first-child::before{top:.8rem}

.prose h2{
  margin:.15rem 0 .85rem;
  font-family:var(--serif);
  font-size:clamp(1.4rem,3.2vw,1.95rem);
  font-weight:600;
  line-height:1.28;
  color:#f0fff5;
  text-shadow:0 0 20px rgba(105,255,105,.35);
}
.prose h3{
  margin:1.5rem 0 .5rem;
  font-family:var(--serif);
  font-size:1.2rem;
  color:#ddffdd;
}
.prose small{
  display:block;
  font-size:.75rem;
  letter-spacing:.2em;
  color:var(--cyan);
  margin-bottom:.2rem;
}
.prose p{margin:0 0 1rem;font-size:1.02rem}
.prose ul,.prose ol{margin:0 0 1.1rem;padding-left:1.35rem}
.prose li{margin:.32rem 0}
.prose a{border-bottom:1px solid rgba(105,255,105,.5)}
.prose img{margin:.9rem 0;border-radius:10px;border:1px solid var(--line)}
.prose blockquote{
  margin:1.2rem 0;
  padding:.85rem 1.1rem;
  border-left:3px solid var(--neon);
  border-radius:0 10px 10px 0;
  background:rgba(105,255,105,.07);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.18);
}
.prose blockquote p:last-child{margin:0}
.prose table{width:100%;border-collapse:collapse;font-size:1rem}
.prose th,.prose td{border:1px solid var(--line);padding:.5rem .6rem;text-align:left;vertical-align:top}
.prose th{background:rgba(105,255,105,.1);color:#effff4}

/* ---------- 页脚 ---------- */
.foot{
  margin-top:clamp(2rem,6vw,4rem);
  padding:clamp(1.6rem,4vw,3rem) clamp(1rem,3vw,2rem) 1.1rem;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(23,38,23,.55),rgba(12,24,16,.96) 45%,#08120b);
}

.cta{
  max-width:1180px;
  margin:0 auto clamp(1.6rem,4vw,2.4rem);
  display:flex;
  flex-wrap:wrap;
  gap:1rem;
  align-items:center;
  justify-content:space-between;
  padding:1.5rem 1.6rem;
  border-radius:10px;
  background:var(--iri);
  color:#05170c;
  box-shadow:0 0 0 1px rgba(255,255,255,.45),0 26px 52px -34px rgba(0,255,255,.95);
}
.cta-brand{
  margin:0;
  font-family:var(--serif);
  font-weight:700;
  font-size:clamp(1.2rem,3.4vw,2rem);
  line-height:1.2;
}
.cta-btn{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:.45rem 1.35rem;
  border-radius:999px;
  background:#08160d;
  color:var(--neon);
  font-size:.95rem;
  letter-spacing:.05em;
  box-shadow:0 0 20px rgba(0,0,0,.5);
}
.cta-btn:hover{background:#04100a;color:var(--cyan)}

.foot-grid{
  max-width:1180px;
  margin:0 auto;
  display:grid;
  grid-template-columns:1.3fr 1fr 1fr 1fr;
  gap:1.4rem;
}
.foot-brand p{
  margin:0;
  font-family:var(--serif);
  font-size:1.05rem;
  color:#eafff0;
}
.foot-grid dl{margin:0}
.foot-grid dt{
  margin-bottom:.4rem;
  font-size:.76rem;
  letter-spacing:.2em;
  color:var(--cyan);
}
.foot-grid dd{margin:0}
.foot-grid ul{margin:0;padding:0;list-style:none;display:grid;gap:.05rem}
.foot-grid a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  font-size:.95rem;
  color:#bfe8cb;
}
.foot-grid a:hover{color:var(--cyan)}

.foot-base{
  max-width:1180px;
  margin:1.6rem auto 0;
  padding-top:.9rem;
  border-top:1px solid rgba(105,255,105,.18);
  display:flex;
  flex-wrap:wrap;
  gap:.5rem 1.2rem;
  justify-content:space-between;
  font-size:.95rem;
  color:var(--muted);
}
.foot-base p{margin:0;display:flex;flex-wrap:wrap;gap:1rem}
.foot-base a{display:inline-flex;align-items:center;min-height:40px;color:var(--muted)}
.foot-base a:hover{color:var(--cyan)}

/* ---------- 滚动出现 ---------- */
.js .reveal{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .6s ease var(--d,0ms),transform .6s cubic-bezier(.2,.8,.3,1) var(--d,0ms);
  will-change:opacity,transform;
}
.js .reveal.in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .js .reveal{opacity:1;transform:none;transition:none}
  .hero-frame::before{animation:none}
  *{animation-duration:.001ms!important;animation-iteration-count:1!important}
}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .foot-grid{grid-template-columns:1fr 1fr}
}

@media (max-width:860px){
  .doc{grid-template-columns:1fr}
  .side{position:static;top:auto}
  .side ol{grid-template-columns:1fr 1fr;display:grid}
  .prose > section{padding-left:2.4rem}
}

@media (max-width:640px){
  body{font-size:16.5px}
  .top{flex-wrap:wrap;gap:.5rem;padding:.6rem .8rem}
  .brand{width:42px;height:42px}
  .menu{margin-inline:0;width:100%}
  .menu ol{justify-content:flex-start;gap:.35rem}
  .menu a{min-height:42px;padding:.2rem .6rem;font-size:.9rem}
  .hero{
    min-height:0;
    grid-template-rows:auto auto;
    justify-items:stretch;
    align-content:start;
    padding:1.3rem 1rem 2.2rem;
    clip-path:polygon(0 0,100% 0,100% 97%,0 100%);
  }
  .hero-copy{order:-1;text-align:left;max-width:none}
  .hero-copy h1{font-size:clamp(1.85rem,8.6vw,2.5rem)}
  .hero-frame{
    position:relative;
    inset:auto;
    height:32vh;
    min-height:170px;
    margin-top:1.2rem;
    border-radius:10px;
    overflow:hidden;
  }
  .hero-frame::before{width:110px;height:110px;right:6%;top:8%}
  .hero-blade{bottom:8%}
  .prose > section{padding:1.2rem 0 1.6rem 2.1rem;scroll-margin-top:78px}
  .prose > section::before{top:1.5rem;left:.1rem;font-size:.85rem}
  .prose table{display:block;overflow-x:auto;white-space:nowrap}
  .foot-grid{grid-template-columns:1fr 1fr;gap:1rem}
  .cta{padding:1.2rem}
}

@media (max-width:400px){
  .side ol{grid-template-columns:1fr}
}

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