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

:root{
  --ink:#001e3c;
  --ink-2:#002c53;
  --mint:#99ffcc;
  --neon:#00ff41;
  --paper:#e8fff7;
  --dim:#8fb6c9;
  --rail:144px;
  --r:4px;
  --edge:rgba(153,255,204,.16);
}

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

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

body{
  margin:0;
  min-height:100vh;
  width:100%;
  max-width:100%;
  overflow-x:hidden;
  background:var(--ink);
  color:var(--paper);
  font-family:"DM Sans","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  font-size:17px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}

body::before{
  content:"";
  position:fixed;
  top:-22vh;
  right:-12vw;
  width:72vw;
  height:72vw;
  z-index:0;
  pointer-events:none;
  filter:blur(64px);
  background:
    radial-gradient(closest-side,rgba(0,255,65,.22),transparent 72%),
    radial-gradient(closest-side at 32% 68%,rgba(153,255,204,.18),transparent 72%);
  animation:breathe 15s ease-in-out infinite;
}

@keyframes breathe{
  0%,100%{transform:scale(1) translateY(0);opacity:.6}
  50%{transform:scale(1.13) translateY(3vh);opacity:1}
}

#top{position:relative;z-index:1;max-width:100%}

a{color:var(--mint)}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--neon);outline-offset:2px}

/* 竖排导航 */
.rail{
  position:fixed;
  top:0;bottom:0;left:0;
  width:var(--rail);
  z-index:30;
  display:flex;
  flex-direction:column;
  gap:1rem;
  padding:1.4rem .8rem;
  border-right:1px solid var(--edge);
  background:rgba(0,18,36,.62);
  backdrop-filter:blur(10px);
}

.rail-mark{
  width:44px;height:44px;
  flex:0 0 auto;
  display:grid;place-items:center;
  overflow:hidden;
  border-radius:52% 46% 54% 48%;
  background:linear-gradient(140deg,var(--neon),var(--mint));
  color:var(--ink);
  font-size:18px;
  font-weight:700;
  text-decoration:none;
  animation:markMorph 11s ease-in-out infinite;
}
.rail-mark img{width:100%;height:100%;object-fit:cover;display:block}

@keyframes markMorph{
  0%,100%{border-radius:52% 46% 54% 48%}
  50%{border-radius:46% 54% 44% 56%}
}

.rail-list{
  list-style:none;
  margin:0;padding:0;
  display:flex;
  flex-direction:column;
  gap:.15rem;
  min-width:0;
}

.rail-list a{
  display:grid;
  gap:.1rem;
  min-height:44px;
  padding:.5rem .45rem;
  border-radius:var(--r);
  color:var(--paper);
  font-size:16px;
  line-height:1.35;
  text-decoration:none;
  transition:background .25s ease,color .25s ease,transform .25s ease;
}
.rail-list a i{
  font-style:normal;
  font-size:12px;
  letter-spacing:.14em;
  color:rgba(153,255,204,.6);
}
.rail-list a b{font-weight:500}
.rail-list a:hover,
.rail-list a[aria-current]{
  background:rgba(0,255,65,.14);
  color:var(--mint);
  transform:translateX(2px);
}

.rail-call{
  margin-top:auto;
  display:flex;
  align-items:center;
  justify-content:center;
  min-height:46px;
  border-radius:var(--r);
  background:var(--neon);
  color:var(--ink);
  font-size:16px;
  font-weight:700;
  text-decoration:none;
  transition:background .25s ease;
}
.rail-call:hover{background:var(--mint)}

/* 首屏 */
.hero{
  position:relative;
  min-height:45vh;
  display:flex;
  align-items:center;
  overflow:hidden;
  max-width:100%;
  padding:2.4rem 2.2rem 2.4rem calc(var(--rail) + 2.2rem);
  border-bottom:1px solid var(--edge);
}
.hero-media{position:absolute;inset:0;margin:0;overflow:hidden}
.hero-media img{
  width:100%;height:100%;
  object-fit:cover;
  opacity:.45;
  filter:saturate(.95);
}
.hero-veil{
  position:absolute;inset:0;
  background:linear-gradient(96deg,var(--ink) 20%,rgba(0,30,60,.62) 56%,rgba(0,30,60,.12));
}
.hero-seq{
  position:absolute;
  right:1.5vw;
  bottom:-.14em;
  z-index:1;
  font-size:clamp(9rem,24vw,22rem);
  font-weight:700;
  line-height:.8;
  letter-spacing:-.05em;
  color:transparent;
  -webkit-text-stroke:2px rgba(0,255,65,.34);
  pointer-events:none;
  animation:breathe 12s ease-in-out infinite;
}
.hero-in{position:relative;z-index:2;max-width:56ch;min-width:0}
.hero-kicker{
  margin:0 0 .5rem;
  font-size:16px;
  letter-spacing:.18em;
  color:var(--mint);
}
.hero h1{
  margin:0;
  font-size:clamp(2rem,5.2vw,3.7rem);
  line-height:1.12;
  letter-spacing:-.02em;
  font-weight:700;
  overflow-wrap:break-word;
}
.hero-sub{
  margin:.9rem 0 0;
  max-width:48ch;
  font-size:17px;
  color:var(--dim);
}

/* 内容区 */
.wrap{
  margin-left:var(--rail);
  display:grid;
  grid-template-columns:minmax(0,1fr) 248px;
  gap:2.4rem;
  align-items:start;
  max-width:100%;
  padding:0 2.2rem 3.5rem;
}
.stream{min-width:0;max-width:100%}
.wrap > *{min-width:0}

.prose{
  max-width:70ch;
  min-width:0;
  overflow-wrap:break-word;
  word-break:break-word;
}
.prose > section{
  padding:2.1rem 0;
  border-top:1px solid var(--edge);
  scroll-margin-top:1.2rem;
  min-width:0;
  max-width:100%;
}
.prose > section:first-child{border-top:0;padding-top:1.7rem}
.prose h2{
  margin:0 0 .85rem;
  font-size:clamp(1.45rem,2.6vw,2rem);
  line-height:1.25;
  letter-spacing:-.01em;
  overflow-wrap:break-word;
}
.prose h2 span{position:relative;display:inline-block;max-width:100%;padding-bottom:.22rem}
.prose h2 span::after{
  content:"";
  position:absolute;left:0;right:0;bottom:0;
  height:3px;
  border-radius:3px;
  background:linear-gradient(90deg,var(--neon),rgba(0,255,65,0));
}
.prose h3{margin:1.4rem 0 .5rem;font-size:18px;color:var(--mint)}
.prose p{margin:0 0 1rem}
.prose ul,.prose ol{margin:0 0 1rem;padding-left:1.3rem}
.prose li{margin:.3rem 0}
.prose a{color:var(--mint);text-underline-offset:.2em;overflow-wrap:break-word}
.prose strong{color:#fff}
.prose img{
  display:block;
  max-width:100%;
  height:auto;
  margin:1rem 0;
  border-radius:var(--r);
}
.prose figure{max-width:100%;margin:1rem 0}
.prose iframe,.prose video,.prose svg{max-width:100%}
.prose table{
  display:block;
  width:100%;
  max-width:100%;
  overflow-x:auto;
  border-collapse:collapse;
  margin:1rem 0;
}
.prose th,.prose td{padding:.45rem .6rem;border-bottom:1px solid var(--edge);text-align:left}
.prose pre{
  max-width:100%;
  overflow-x:auto;
  padding:.8rem 1rem;
  border-radius:var(--r);
  background:var(--ink-2);
  font-size:16px;
}
.prose code{overflow-wrap:break-word}
.prose blockquote{
  margin:1.2rem 0;
  padding:.6rem 1rem;
  border-left:3px solid var(--neon);
  border-radius:0 var(--r) var(--r) 0;
  background:rgba(0,255,65,.06);
}

/* 右侧栏 */
.side{
  position:sticky;
  top:1.4rem;
  display:grid;
  gap:.7rem;
  min-width:0;
  padding:1.1rem 1rem 1.2rem;
  border-radius:var(--r);
  background:var(--ink-2);
}
.side h2{
  margin:.3rem 0 0;
  font-size:16px;
  font-weight:700;
  letter-spacing:.06em;
  color:var(--mint);
}
.side h2 span{display:inline-block;padding-bottom:.25rem;border-bottom:2px solid rgba(0,255,65,.5)}
.side-list{list-style:none;margin:0;padding:0;display:grid;gap:.1rem;min-width:0}
.side-list a{
  display:block;
  min-height:40px;
  padding:.5rem .4rem;
  border-radius:var(--r);
  color:var(--paper);
  font-size:16px;
  text-decoration:none;
  overflow-wrap:break-word;
}
.side-list a:hover{background:rgba(153,255,204,.12);color:var(--mint)}
.side-top{
  display:flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  border-radius:var(--r);
  background:rgba(0,255,65,.14);
  color:var(--mint);
  font-size:16px;
  font-weight:500;
  text-decoration:none;
}

/* 页脚 */
.foot{
  margin-left:var(--rail);
  max-width:100%;
  padding:2.4rem 2.2rem 2rem;
  border-top:1px solid var(--edge);
  background:linear-gradient(180deg,rgba(0,44,83,.55),rgba(0,30,60,0));
}
.foot-grid{
  display:grid;
  grid-template-columns:1fr 1.5fr 1fr;
  gap:1.8rem;
  max-width:1040px;
}
.foot-grid > *{min-width:0}
.foot-addr{font-style:normal;display:grid;gap:.25rem;align-content:start}
.foot-brand{font-weight:700}
.foot-tag{font-size:16px;color:var(--dim)}
.foot-form{display:grid;gap:.4rem;align-content:start;min-width:0}
.foot-form label{font-size:16px;color:var(--mint)}
.foot-field{display:flex;gap:.4rem;min-width:0}
.foot-field input{
  flex:1 1 auto;
  min-width:0;
  min-height:44px;
  padding:.5rem .7rem;
  border:0;
  border-radius:var(--r);
  background:var(--ink-2);
  color:var(--paper);
  font:inherit;
  font-size:16px;
}
.foot-field input::placeholder{color:rgba(143,182,201,.8)}
.foot-field button{
  min-height:44px;
  padding:.5rem 1rem;
  border:0;
  border-radius:var(--r);
  background:var(--neon);
  color:var(--ink);
  font:inherit;
  font-weight:700;
  cursor:pointer;
  transition:background .25s ease;
}
.foot-field button:hover{background:var(--mint)}
.foot-note{font-size:16px;color:var(--mint);min-height:1.2em}
.foot-links{list-style:none;margin:0;padding:0;display:grid;gap:.1rem;align-content:start;min-width:0}
.foot-links a{
  display:block;
  min-height:40px;
  padding:.45rem 0;
  color:var(--paper);
  font-size:16px;
  text-decoration:none;
}
.foot-links a:hover{color:var(--mint)}
.foot-nav{
  margin-top:1.8rem;
  padding-top:1.2rem;
  border-top:1px solid var(--edge);
  min-width:0;
}
.foot-nav dl{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(120px,1fr));
  gap:.1rem .8rem;
  margin:0;
}
.foot-nav dt{margin:0;font-weight:700;color:var(--mint)}
.foot-nav dd{margin:0;min-width:0}
.foot-nav a{
  display:block;
  min-height:40px;
  padding:.4rem 0;
  color:var(--dim);
  font-size:16px;
  text-decoration:none;
  overflow-wrap:break-word;
}
.foot-nav a:hover{color:var(--paper)}
.foot-copy{
  margin:1.4rem 0 0;
  padding-top:1rem;
  border-top:1px solid var(--edge);
  font-size:16px;
  color:var(--dim);
}

@media (max-width:900px){
  body{padding-bottom:4.9rem}
  .rail{
    top:auto;right:0;bottom:0;left:0;
    width:auto;max-width:100vw;height:auto;
    flex-direction:row;
    align-items:center;
    gap:.35rem;
    padding:.45rem .55rem;
    border-right:0;
    border-top:1px solid var(--edge);
    overflow-x:auto;
    overflow-y:hidden;
    overscroll-behavior-x:contain;
  }
  .rail-mark{width:40px;height:40px;font-size:16px}
  .rail-list{flex-direction:row;gap:.25rem;flex-wrap:nowrap}
  .rail-list a{
    grid-auto-flow:column;
    align-items:center;
    gap:.35rem;
    white-space:nowrap;
    min-height:44px;
    padding:.5rem .6rem;
  }
  .rail-list a i{font-size:11px}
  .rail-call{margin-top:0;flex:0 0 auto;min-height:44px;padding:0 1rem}

  .hero{min-height:44vh;padding:1.5rem 1.1rem;max-width:100%}
  .hero-seq{right:0;bottom:0;font-size:clamp(6rem,30vw,11rem);opacity:.75}
  .hero-sub{font-size:16px}
  .hero h1{font-size:clamp(1.85rem,8.6vw,2.6rem)}

  .wrap{
    margin-left:0;
    grid-template-columns:minmax(0,1fr);
    gap:1.8rem;
    padding:0 1.1rem 2.6rem;
    width:100%;
  }
  .prose{max-width:100%}
  .side{position:static;order:2}
  .foot{margin-left:0;padding:1.8rem 1.1rem 1.6rem}
  .foot-grid{grid-template-columns:1fr;gap:1.3rem}
  .foot-nav dl{grid-template-columns:1fr 1fr}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
}

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