:root{
  --ink:#0B1622;
  --ink-2:#14283A;
  --grass:#1F7A4C;
  --grass-deep:#0E3B27;
  --acid:#C8FF3D;
  --orange:#FF6A2B;
  --white:#F4F7F5;
  --grid:#5D707B;
  --mist:#DDE7E0;
  --line:rgba(93,112,123,.45);
  --line-soft:rgba(93,112,123,.24);
  --rail-w:84px;
  --pad:clamp(18px,3.6vw,52px);
  --font-display:"Barlow Condensed","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --ease:cubic-bezier(.2,.7,.2,1);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd,dt,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
a{color:inherit;text-decoration:none}
[hidden]{display:none!important}

body{
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  color:var(--white);
  background-color:var(--ink);
  background-image:
    repeating-linear-gradient(114deg,rgba(200,255,61,.05) 0 1px,transparent 1px 96px),
    radial-gradient(1100px 620px at 88% -6%,rgba(31,122,76,.34),transparent 62%),
    radial-gradient(760px 520px at 4% 104%,rgba(255,106,43,.12),transparent 60%);
  -webkit-font-smoothing:antialiased;
  padding-left:var(--rail-w);
}

::selection{background:var(--acid);color:var(--ink)}
:focus-visible{outline:2px solid var(--acid);outline-offset:3px}

h1,h2,h3,h4,h5{font-family:var(--font-display);font-weight:800;letter-spacing:-.02em;line-height:1.08;text-wrap:balance}
h1{font-size:clamp(38px,6vw,64px)}
h2{font-size:clamp(26px,3.4vw,40px)}
h3{font-size:clamp(20px,2.2vw,28px)}
h4{font-size:20px;font-weight:700;letter-spacing:0;line-height:1.3}
h5{font-size:17px;font-weight:700;letter-spacing:0}

.display{font-family:var(--font-display);font-weight:800;letter-spacing:-.025em;line-height:1.02}
.mono,.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.04em}

.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;font-weight:500;
  letter-spacing:.22em;text-transform:uppercase;color:var(--acid);
}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--acid);flex:none}

.prose{max-width:38em}
.prose p{line-height:1.78}
.prose p+p{margin-top:1em}
.prose a{color:var(--acid);box-shadow:inset 0 -1px 0 currentColor}
.prose a:hover{color:var(--white)}
.prose strong{color:var(--white);font-weight:700}
.prose h3{margin-top:1.5em;margin-bottom:.45em}
.prose ul{list-style:none;display:flex;flex-direction:column;gap:.4em}
.prose ul li{position:relative;padding-left:1.1em}
.prose ul li::before{content:"";position:absolute;left:0;top:.85em;width:8px;height:2px;background:var(--acid)}

.wrap{width:100%;max-width:1280px;margin:0 auto;padding-left:var(--pad);padding-right:var(--pad)}
.section{padding-block:clamp(44px,6vw,88px)}
.rule{height:1px;width:100%;background:var(--line-soft);border:0;margin:0}
.stack{display:flex;flex-direction:column;gap:var(--stack-gap,18px)}

.grid{display:grid;gap:clamp(16px,2.4vw,32px)}
.grid--7-5{grid-template-columns:7fr 5fr}
.grid--4-8{grid-template-columns:4fr 8fr}
.grid--3-9{grid-template-columns:3fr 9fr}

.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 24px;border:1px solid transparent;border-radius:0;
  font-family:var(--font-display);font-weight:800;font-size:16px;letter-spacing:.04em;line-height:1.2;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn--primary{background:var(--orange);color:#0B1622}
.btn--primary:hover{background:var(--acid);color:var(--ink)}
.btn--ghost{background:transparent;color:var(--white);border-color:var(--line)}
.btn--ghost:hover{border-color:var(--acid);color:var(--acid)}
.btn--quiet{background:transparent;color:var(--acid);padding-left:0;padding-right:0;border-bottom:2px solid var(--acid)}

.tag{
  display:inline-block;padding:4px 10px;
  font-family:var(--font-mono);font-size:11px;font-weight:500;
  letter-spacing:.12em;text-transform:uppercase;
  border:1px solid var(--line);color:var(--mist);
}
.tag--acid{background:var(--acid);border-color:var(--acid);color:var(--ink);font-weight:700}

.card{
  position:relative;padding:clamp(18px,2.2vw,28px);
  background:var(--ink-2);border:1px solid var(--line-soft);border-radius:0;
}
.card::after{
  content:"";position:absolute;right:0;bottom:0;
  width:28px;height:1px;background:var(--grid);
  transition:width .18s var(--ease),background .18s var(--ease);
}
.card:hover::after{width:36px;background:var(--acid)}

.stat{display:flex;flex-direction:column;gap:4px}
.stat-value{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:clamp(28px,3.6vw,40px);font-weight:700;letter-spacing:.02em;line-height:1;color:var(--acid);
}
.stat-label{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--grid)}

.panel{border-top:1px solid var(--line)}
.panel:last-child{border-bottom:1px solid var(--line)}
.panel__summary{
  display:flex;align-items:flex-start;justify-content:space-between;gap:16px;
  padding:18px 0;cursor:pointer;list-style:none;
  font-family:var(--font-display);font-weight:700;font-size:18px;letter-spacing:-.01em;line-height:1.35;
  color:var(--white);transition:color .18s var(--ease);
}
.panel__summary::-webkit-details-marker{display:none}
.panel__summary::after{content:"+";font-family:var(--font-mono);font-size:20px;line-height:1;color:var(--acid);flex:none}
.panel[open] .panel__summary::after{content:"–"}
.panel__summary:hover{color:var(--acid)}
.panel__body{padding-bottom:20px;color:var(--mist);animation:panelIn .18s var(--ease) both}
.panel__body p{max-width:38em}
@keyframes panelIn{from{opacity:0;transform:translateY(-5px)}to{opacity:1;transform:none}}

.media{
  position:relative;overflow:hidden;border-radius:0;
  background:var(--grass-deep);border:1px solid var(--line-soft);aspect-ratio:16/9;
}
.media img,.media video{width:100%;height:100%;object-fit:cover;display:block}
.media--diag{clip-path:polygon(0 0,100% 0,100% 87%,87% 100%,0 100%)}
.media--tall{aspect-ratio:4/5}
.media--wide{aspect-ratio:21/9}
.media__cap{
  position:absolute;left:0;bottom:0;max-width:100%;
  padding:8px 12px;background:rgba(11,22,34,.86);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--mist);
}

.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--grid);
}
.crumbs li{display:flex;align-items:center;gap:8px}
.crumbs li+li::before{content:"/";color:var(--line)}
.crumbs a:hover{color:var(--acid)}
.crumbs [aria-current="page"]{color:var(--white)}

/* ---------- Header rail ---------- */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:200;
  padding:12px 18px;background:var(--acid);color:var(--ink);
  font-family:var(--font-display);font-weight:800;font-size:15px;letter-spacing:.04em;
  transform:translateY(-200%);transition:transform .16s var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{transform:none}

.site-rail{
  position:fixed;top:0;left:0;bottom:0;z-index:90;
  width:var(--rail-w);
  display:flex;flex-direction:column;align-items:center;
  padding:24px 0 20px;
  background:linear-gradient(180deg,#0B1622 0%,#0B1622 52%,#0E3B27 100%);
  border-right:1px solid var(--line);
  overflow:hidden;
}
.site-rail::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(118deg,rgba(200,255,61,.06) 0 1px,transparent 1px 72px);
}

.rail-brand{
  position:relative;z-index:2;
  display:flex;flex-direction:column;align-items:center;gap:12px;
  text-align:center;
}
.rail-logo{display:flex;flex-direction:column;align-items:center;gap:8px;padding:4px}
.rail-logo-cn{
  writing-mode:vertical-rl;
  font-family:var(--font-display);font-weight:800;font-size:23px;
  line-height:1;letter-spacing:.16em;color:var(--white);
  transition:color .18s var(--ease);
}
.rail-logo:hover .rail-logo-cn{color:var(--acid)}
.rail-logo-en{font-family:var(--font-mono);font-size:8px;letter-spacing:.18em;color:var(--grid)}
.rail-tag{
  writing-mode:vertical-rl;
  padding:10px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  font-family:var(--font-mono);font-size:10px;letter-spacing:.3em;color:var(--grid);
}

.rail-nav{
  position:relative;z-index:2;
  flex:1 1 auto;width:100%;min-height:0;
  display:flex;align-items:center;justify-content:center;
  padding:14px 0;overflow-y:auto;scrollbar-width:none;
}
.rail-nav::-webkit-scrollbar{display:none}
.rail-nav-list{display:flex;flex-direction:column;align-items:center;gap:2px;width:100%}
.rail-nav-item{width:100%}
.rail-nav-link{
  position:relative;display:flex;flex-direction:column;align-items:center;gap:6px;
  width:100%;padding:9px 2px;color:var(--grid);
  transition:color .18s var(--ease);
}
.rail-nav-link::after{
  content:"";position:absolute;left:2px;top:50%;width:0;height:2px;
  background:var(--acid);transform:translateY(-50%);
  transition:width .28s var(--ease);
}
.rail-nav-link:hover{color:var(--white)}
.rail-nav-idx{font-family:var(--font-mono);font-size:9px;letter-spacing:.1em;opacity:.85;color:inherit}
.rail-nav-label{
  writing-mode:vertical-rl;
  font-family:var(--font-display);font-weight:700;font-size:13px;
  letter-spacing:.14em;line-height:1;
}
.rail-nav-link[aria-current="page"]{color:var(--white)}
.rail-nav-link[aria-current="page"]::after{width:8px}
.rail-nav-link[aria-current="page"] .rail-nav-idx{color:var(--acid);opacity:1}

.rail-tools{
  position:relative;z-index:2;
  display:flex;flex-direction:column;align-items:center;gap:8px;
  width:100%;margin-top:12px;
}
.rail-top{
  writing-mode:vertical-rl;width:40px;padding:8px 0;
  font-family:var(--font-mono);font-size:10px;letter-spacing:.2em;
  color:var(--mist);border:1px solid rgba(93,112,123,.5);
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.rail-top:hover{color:var(--acid);border-color:var(--acid)}

.nav-toggle{
  display:none;align-items:center;gap:8px;
  padding:8px 12px;border:1px solid rgba(93,112,123,.55);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--white);
}
.nav-toggle-bars{display:flex;flex-direction:column;gap:3px;width:16px}
.nav-toggle-bars span{display:block;height:2px;background:var(--acid);transition:transform .18s var(--ease),opacity .18s var(--ease)}
.nav-toggle-text{font-family:var(--font-mono);font-size:11px}

.rail-cta{
  position:relative;z-index:2;
  display:flex;align-items:center;justify-content:center;
  width:56px;margin-top:16px;padding:18px 0;
  writing-mode:vertical-rl;
  background:var(--orange);color:#0B1622;
  font-family:var(--font-display);font-weight:800;font-size:15px;letter-spacing:.24em;line-height:1;
  transition:background .18s var(--ease),color .18s var(--ease);
}
.rail-cta:hover{background:var(--acid);color:var(--ink)}

.rail-progress{
  position:absolute;right:0;top:0;bottom:0;width:3px;z-index:3;
  background:rgba(93,112,123,.18);pointer-events:none;
}
.rail-progress-bar{
  display:block;width:100%;height:100%;background:var(--acid);
  transform:scaleY(var(--p,0));transform-origin:top center;
  transition:transform .1s linear;
}

/* ---------- Footer ---------- */
.site-foot{
  position:relative;
  background:var(--grass-deep);
  border-top:1px solid rgba(200,255,61,.28);
  color:var(--mist);
}
.foot-stripe{
  display:block;height:4px;width:100%;
  background:
    linear-gradient(90deg,var(--acid) 0 84px,var(--orange) 84px 132px,transparent 132px),
    repeating-linear-gradient(114deg,rgba(200,255,61,.16) 0 1px,transparent 1px 28px);
}
.foot-wrap{
  width:100%;max-width:1280px;margin:0 auto;
  padding:clamp(28px,4.6vw,56px) var(--pad) 28px;
}
.foot-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;
  padding-bottom:22px;border-bottom:1px solid rgba(244,247,245,.14);
}
.foot-id{display:flex;flex-direction:column;gap:4px}
.foot-brand{
  font-family:var(--font-display);font-weight:800;line-height:1;
  font-size:clamp(26px,3.4vw,38px);letter-spacing:-.02em;color:var(--white);
  transition:color .18s var(--ease);
}
.foot-brand:hover{color:var(--acid)}
.foot-sub{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;
  color:rgba(244,247,245,.62);
}
.foot-cta{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 20px;background:var(--orange);color:#0B1622;
  font-family:var(--font-display);font-weight:800;font-size:15px;letter-spacing:.04em;line-height:1.2;
  transition:background .18s var(--ease),color .18s var(--ease);
}
.foot-cta::after{content:"›";font-family:var(--font-mono);font-size:16px;line-height:1}
.foot-cta:hover{background:var(--acid);color:var(--ink)}

.foot-grid{
  display:grid;grid-template-columns:1.05fr 1.15fr .95fr .85fr;
  gap:clamp(18px,2.4vw,34px);
  padding:clamp(24px,3.4vw,40px) 0;
}
.foot-block{min-width:0;padding-top:14px;border-top:2px solid rgba(244,247,245,.16)}
.foot-block--index{border-top-color:var(--acid)}
.foot-block--contact{border-top-color:rgba(244,247,245,.55)}
.foot-block--submit{border-top-color:var(--grass)}
.foot-block--legal{border-top-color:var(--grid)}
.foot-title{
  font-family:var(--font-mono);font-size:11px;font-weight:500;
  letter-spacing:.2em;color:rgba(244,247,245,.72);margin-bottom:12px;
}
.foot-links{display:flex;flex-direction:column;gap:8px}
.foot-links a{
  font-size:14px;line-height:1.6;color:var(--mist);
  transition:color .18s var(--ease);
}
.foot-links a:hover{color:var(--acid)}
.foot-meta{display:block}
.foot-meta dt{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;
  color:rgba(244,247,245,.5);margin-top:10px;
}
.foot-meta dt:first-child{margin-top:0}
.foot-meta dd{font-size:14px;line-height:1.6;color:var(--white);word-break:break-word}
.foot-note{
  font-size:13px;line-height:1.7;color:rgba(244,247,245,.74);
  max-width:30em;margin-bottom:14px;
}
.foot-link-strong{
  display:inline-block;padding:10px 16px;
  border:1px solid rgba(200,255,61,.55);color:var(--acid);
  font-size:14px;font-weight:700;line-height:1.3;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.foot-link-strong:hover{background:var(--acid);color:var(--ink);border-color:var(--acid)}
.foot-icp{
  margin-top:16px;font-family:var(--font-mono);font-size:11px;
  letter-spacing:.08em;color:rgba(244,247,245,.6);
}
.foot-base{
  display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between;
  padding-top:20px;border-top:1px solid rgba(244,247,245,.14);
}
.foot-copy{font-size:12px;letter-spacing:.06em;color:rgba(244,247,245,.68)}
.foot-copy--muted{font-family:var(--font-mono);color:rgba(244,247,245,.42)}

/* ---------- 显现与计数 ---------- */
html.js [data-reveal]{opacity:0;transform:translateY(14px);transition:opacity .4s var(--ease),transform .4s var(--ease)}
html.js [data-reveal].is-in{opacity:1;transform:none}

#main-content{scroll-margin-top:18px}

/* ---------- 平板 ---------- */
@media (max-width:1023px){
  .grid--7-5,.grid--4-8,.grid--3-9{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr}
}

/* ---------- 移动端 ---------- */
@media (max-width:899px){
  body{padding-left:0}
  #main-content{scroll-margin-top:76px}

  .site-rail{
    position:sticky;top:0;left:auto;right:auto;bottom:auto;
    width:100%;height:auto;z-index:90;
    flex-direction:row;align-items:center;justify-content:space-between;
    gap:12px;padding:12px 16px;
    border-right:0;border-bottom:1px solid var(--line);
    background:linear-gradient(180deg,#0B1622 0%,#0C1B29 100%);
    overflow:visible;
  }
  .site-rail::before{opacity:.4}

  .rail-brand{flex-direction:row;align-items:center;gap:10px;z-index:96}
  .rail-logo{flex-direction:row;align-items:baseline;gap:6px;padding:0}
  .rail-logo-cn{writing-mode:horizontal-tb;font-size:19px;letter-spacing:.08em}
  .rail-logo-en{display:none}
  .rail-tag{
    writing-mode:horizontal-tb;padding:0 0 0 10px;
    border-top:0;border-bottom:0;border-left:1px solid var(--line);
    font-size:9px;letter-spacing:.18em;
  }

  .rail-tools{flex-direction:row;width:auto;margin-top:0;gap:8px;z-index:96}
  .rail-top{width:auto;padding:8px 10px;writing-mode:horizontal-tb;font-size:10px;letter-spacing:.12em}
  .nav-toggle{display:inline-flex}

  .rail-cta{
    writing-mode:horizontal-tb;width:auto;margin-top:0;
    padding:9px 14px;font-size:13px;letter-spacing:.06em;z-index:96;
  }

  .rail-nav{
    position:fixed;inset:0;z-index:95;
    display:none;flex-direction:column;align-items:stretch;justify-content:flex-start;
    width:100%;padding:84px 22px 32px;
    background:#0B1622;
    border-top:0;overflow-y:auto;
  }
  .site-rail[data-open="true"] .rail-nav{display:flex}
  .rail-nav-list{align-items:stretch;gap:0;width:100%}
  .rail-nav-item{width:100%}
  .rail-nav-link{
    flex-direction:row;align-items:baseline;justify-content:space-between;gap:14px;
    width:100%;padding:16px 2px;
    border-bottom:1px solid rgba(93,112,123,.28);
    color:var(--mist);
  }
  .rail-nav-link::after{display:none}
  .rail-nav-link[aria-current="page"]{color:var(--white);box-shadow:inset 3px 0 0 var(--acid);padding-left:14px}
  .rail-nav-label{writing-mode:horizontal-tb;font-size:24px;letter-spacing:.02em;line-height:1.2}
  .rail-nav-idx{font-size:11px;color:var(--grid)}
  .rail-nav-link[aria-current="page"] .rail-nav-idx{color:var(--acid)}

  .site-rail[data-open="true"] .nav-toggle-bars span:nth-child(1){transform:translateY(5px) rotate(45deg)}
  .site-rail[data-open="true"] .nav-toggle-bars span:nth-child(2){opacity:0}
  .site-rail[data-open="true"] .nav-toggle-bars span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

  html.nav-open{overflow:hidden}

  .rail-progress{top:auto;left:0;right:0;bottom:0;width:auto;height:3px}
  .rail-progress-bar{transform:scaleX(var(--p,0));transform-origin:left center}

  .foot-head{flex-direction:column;align-items:flex-start}
}

@media (max-width:599px){
  .foot-grid{grid-template-columns:1fr}
  .foot-base{flex-direction:column;gap:6px}
  .rail-tag{display:none}
  .foot-cta{width:100%;justify-content:space-between}
}

@media (min-width:900px) and (max-height:780px){
  .site-rail{padding:16px 0 14px}
  .rail-logo-cn{font-size:19px}
  .rail-tag{display:none}
  .rail-nav-link{padding:6px 2px;gap:4px}
  .rail-nav-label{font-size:12px}
  .rail-cta{padding:14px 0;margin-top:10px}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
  html.js [data-reveal]{opacity:1;transform:none}
  .rail-progress-bar{transition:none}
}