:root{
  --ink-950:#07120F;
  --green-800:#0E211B;
  --green-700:#163229;
  --lime-400:#C7F73F;
  --lime-200:#E4FFA8;
  --amber-400:#F5A93F;
  --paper-050:#F3F1E8;
  --glass-150:#E6F1EA;
  --slate-600:#4A6159;
  --ink-900:#101C18;
  --cyan-300:#6FE7D2;

  --font-display:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-serif:"Source Han Serif SC","Songti SC",STSong,Georgia,"Times New Roman",serif;
  --font-mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;

  --shell:1240px;
  --gutter:clamp(18px,4vw,44px);
  --rail:72px;
  --radius-s:10px;
  --radius-m:18px;
  --radius-l:28px;
  --line:rgba(230,241,234,.14);
  --line-strong:rgba(230,241,234,.28);
  --text-dim:rgba(243,241,232,.66);
  --shadow-glass:0 30px 60px -30px rgba(0,0,0,.85);
}

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

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

body{
  margin:0;
  min-height:100vh;
  overflow-x:hidden;
  background:
    radial-gradient(120% 80% at 84% -12%, rgba(111,231,210,.10), transparent 62%),
    radial-gradient(90% 70% at -10% 0%, rgba(199,247,63,.08), transparent 58%),
    var(--green-800);
  color:var(--paper-050);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}

img,picture,svg,video{display:block;max-width:100%}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p,figure,blockquote{margin:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0}
table{border-collapse:collapse;width:100%}

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.14;
}

:focus-visible{
  outline:2px solid var(--lime-400);
  outline-offset:3px;
  border-radius:3px;
  box-shadow:0 0 0 5px rgba(7,18,15,.55);
}

/* ---------- 通用布局 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.section{
  position:relative;
  padding-block:clamp(56px,8vw,110px);
}

.section--ink{background:var(--ink-950)}
.section--glass{
  background:linear-gradient(150deg, rgba(230,241,234,.10), rgba(111,231,210,.06) 55%, rgba(7,18,15,.18));
}

.section--paper{
  background:var(--paper-050);
  color:var(--ink-900);
}
.section--paper h1,.section--paper h2,.section--paper h3,.section--paper h4{color:var(--ink-900)}
.section--paper .lede{color:var(--slate-600)}
.section--paper .eyebrow{color:var(--slate-600)}

.tex-lines{
  background-image:repeating-linear-gradient(180deg, rgba(230,241,234,.05) 0 1px, transparent 1px 8px);
}

.bevel{
  clip-path:polygon(0 0,100% 0,100% calc(100% - 56px),0 100%);
}

.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(16px,2.4vw,32px);
}
.span-4{grid-column:span 4}
.span-5{grid-column:span 5}
.span-6{grid-column:span 6}
.span-7{grid-column:span 7}
.span-8{grid-column:span 8}
.span-12{grid-column:span 12}

/* ---------- 文字 ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:.7em;
  margin:0 0 14px;
  font-family:var(--font-serif);
  font-size:13px;
  letter-spacing:.22em;
  color:var(--lime-400);
}
.eyebrow::before{
  content:"";
  display:block;
  width:26px;
  height:1px;
  background:currentColor;
}

.display-title{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(40px,7vw,96px);
  line-height:1.02;
  letter-spacing:-.03em;
  margin:0;
}

.lede{
  max-width:34em;
  font-size:clamp(16px,1.6vw,19px);
  line-height:1.75;
  color:var(--text-dim);
}

.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.04em;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5em;
  padding:13px 24px;
  border:1px solid transparent;
  border-radius:999px;
  font-family:var(--font-display);
  font-weight:700;
  font-size:15px;
  line-height:1.2;
  letter-spacing:.01em;
  cursor:pointer;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .18s ease;
}
.btn:hover{transform:translateY(-1px)}

.btn-lime{
  background:var(--lime-400);
  color:var(--ink-950);
  border-color:rgba(199,247,63,.9);
  box-shadow:0 14px 34px -18px rgba(199,247,63,.95);
}
.btn-lime:hover{background:var(--lime-200);border-color:var(--lime-200)}

.btn-ghost{
  border-color:var(--line-strong);
  color:var(--paper-050);
}
.btn-ghost:hover{border-color:var(--lime-400);color:var(--lime-200)}

.btn-ink{
  background:var(--ink-950);
  color:var(--paper-050);
}
.btn-ink:hover{background:var(--green-700)}

.btn-sm{padding:9px 16px;font-size:13px}

/* ---------- 头部 ---------- */
.site-head{
  position:sticky;
  top:0;
  z-index:60;
  background:linear-gradient(180deg, rgba(7,18,15,.97), rgba(14,33,27,.93));
  border-bottom:1px solid rgba(199,247,63,.18);
  color:var(--paper-050);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:padding .22s ease;
}

.skip-link{
  position:fixed;
  left:16px;
  top:-120px;
  z-index:200;
  padding:12px 22px;
  border-radius:0 0 12px 12px;
  background:var(--lime-400);
  color:var(--ink-950);
  font-weight:700;
  font-size:14px;
  transition:top .2s ease;
}
.skip-link:focus{top:0}

.head-inner{
  position:relative;
  max-width:var(--shell);
  margin-inline:auto;
  padding:20px var(--gutter) 12px;
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:14px;
}

.head-imprint{
  justify-self:start;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:rgba(230,241,234,.55);
}

.head-brand{
  justify-self:center;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:2px;
  color:var(--paper-050);
  transition:color .2s ease;
}
.head-brand:hover{color:var(--lime-200)}

.brand-cn{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(26px,3.2vw,38px);
  line-height:1.05;
  letter-spacing:-.03em;
}

.brand-latin{
  font-family:var(--font-mono);
  font-weight:400;
  font-size:10px;
  letter-spacing:.5em;
  text-indent:.5em;
  color:var(--lime-400);
}

.head-actions{
  justify-self:end;
  display:flex;
  align-items:center;
  gap:10px;
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:10px 14px;
  border:1px solid var(--line-strong);
  border-radius:999px;
  font-size:13px;
  letter-spacing:.1em;
  cursor:pointer;
  transition:border-color .18s ease,color .18s ease,background-color .18s ease;
}
.nav-toggle:hover{border-color:var(--lime-400);color:var(--lime-200)}

.bars{
  position:relative;
  display:block;
  width:18px;
  height:9px;
}
.bars::before,
.bars::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;
  height:1.5px;
  background:currentColor;
  transition:transform .22s ease,top .22s ease;
}
.bars::before{top:0}
.bars::after{top:7px}
.nav-toggle[aria-expanded="true"] .bars::before{top:3.5px;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .bars::after{top:3.5px;transform:rotate(-45deg)}

.site-nav{
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
  border-top:1px solid rgba(230,241,234,.10);
}

.nav-list{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:clamp(8px,2.2vw,32px);
}

.nav-list a{
  position:relative;
  display:block;
  padding:13px 4px 15px;
  font-size:15px;
  font-weight:500;
  color:var(--text-dim);
  transition:color .18s ease;
}
.nav-list a::after{
  content:"";
  position:absolute;
  left:4px;
  right:4px;
  bottom:9px;
  height:2px;
  background:var(--lime-400);
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform .22s ease;
}
.nav-list a:hover{color:var(--lime-200)}
.nav-list a:hover::after{transform:scaleX(1)}
.nav-list a[aria-current="page"]{color:var(--lime-400)}
.nav-list a[aria-current="page"]::after{transform:scaleX(1)}

.head-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  background:rgba(230,241,234,.08);
  overflow:hidden;
}
.head-progress > span{
  display:block;
  height:100%;
  width:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--lime-400),var(--cyan-300));
  transition:transform .12s linear;
}

.site-head[data-compact] .head-inner{padding-block:12px 8px}
.site-head[data-compact] .nav-list a{padding-block:10px 12px}

/* ---------- 侧边快捷条 ---------- */
.quick-rail{
  position:fixed;
  top:50%;
  right:0;
  transform:translateY(-50%);
  z-index:55;
  display:flex;
  flex-direction:column;
  width:var(--rail);
  background:rgba(7,18,15,.86);
  border:1px solid rgba(199,247,63,.24);
  border-right:0;
  border-radius:16px 0 0 16px;
  box-shadow:0 24px 60px -30px rgba(0,0,0,.9);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}
.quick-rail a{
  display:block;
  padding:20px 0;
  writing-mode:vertical-rl;
  text-orientation:mixed;
  text-align:center;
  font-size:12px;
  letter-spacing:.28em;
  color:var(--text-dim);
  border-bottom:1px solid rgba(230,241,234,.12);
  transition:color .18s ease,background-color .18s ease;
}
.quick-rail a:first-child{color:var(--lime-400);font-weight:700}
.quick-rail a:last-child{border-bottom:0}
.quick-rail a:hover{color:var(--paper-050);background:rgba(199,247,63,.09)}

/* ---------- 页脚 ---------- */
.site-foot{
  position:relative;
  padding:clamp(48px,7vw,96px) 0 26px;
  border-top:1px solid rgba(199,247,63,.22);
  background:
    repeating-linear-gradient(180deg, rgba(230,241,234,.05) 0 1px, transparent 1px 8px),
    linear-gradient(165deg, #0B1A15 0%, var(--ink-950) 46%, #0A211A 100%);
  color:var(--paper-050);
}

.foot-top{
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
  display:grid;
  grid-template-columns:1fr 1.55fr;
  gap:clamp(32px,5vw,80px);
  align-items:start;
}

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

.foot-kicker{
  margin:0 0 16px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.28em;
  text-transform:uppercase;
  color:var(--lime-400);
}

.foot-title{
  margin:0 0 24px;
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(26px,3.6vw,44px);
  line-height:1.12;
  letter-spacing:-.03em;
}

.foot-dirs{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(20px,3vw,40px);
}

.foot-col h3{
  margin:0 0 16px;
  padding-bottom:12px;
  border-bottom:1px solid rgba(230,241,234,.14);
  font-family:var(--font-serif);
  font-weight:400;
  font-size:13px;
  letter-spacing:.2em;
  color:rgba(243,241,232,.55);
}

.foot-col ul{
  display:flex;
  flex-direction:column;
  gap:10px;
}

.foot-col a{
  font-size:15px;
  color:rgba(243,241,232,.78);
  transition:color .18s ease;
}
.foot-col a:hover{color:var(--lime-400)}

.foot-contact{
  max-width:var(--shell);
  margin:clamp(40px,5vw,64px) auto 0;
  padding:clamp(24px,3vw,34px) var(--gutter) 0;
  border-top:1px solid rgba(230,241,234,.14);
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:24px;
}

.foot-label{
  display:block;
  margin-bottom:6px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  color:rgba(243,241,232,.5);
}

.foot-value{
  margin:0;
  font-size:15px;
  line-height:1.6;
  color:var(--paper-050);
  word-break:break-word;
}
.foot-value--mono{
  font-family:var(--font-mono);
  letter-spacing:.05em;
}

.foot-legal{
  max-width:var(--shell);
  margin:clamp(32px,4vw,48px) auto 0;
  padding:18px var(--gutter) 0;
  border-top:1px solid rgba(230,241,234,.12);
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:12px;
  font-size:13px;
  color:rgba(243,241,232,.55);
}
.foot-legal p{margin:0}
.foot-legal-links{
  display:flex;
  align-items:center;
  gap:10px;
}
.foot-legal a{transition:color .18s ease}
.foot-legal a:hover{color:var(--lime-400)}

/* ---------- 内容组件 ---------- */
.card{
  padding:clamp(18px,2.4vw,28px);
  border:1px solid var(--line);
  border-radius:var(--radius-m);
  background:var(--green-700);
}
.section--paper .card{
  background:#fff;
  border-color:rgba(16,28,24,.12);
  color:var(--ink-900);
}

.card--glass{
  border:1px solid rgba(230,241,234,.3);
  background:linear-gradient(150deg, rgba(230,241,234,.16), rgba(230,241,234,.05));
  box-shadow:var(--shadow-glass);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
}

.glass-panel{
  position:relative;
  border-radius:var(--radius-l);
  border:1px solid rgba(230,241,234,.28);
  background:linear-gradient(160deg, rgba(230,241,234,.18), rgba(111,231,210,.08) 58%, rgba(7,18,15,.25));
  box-shadow:var(--shadow-glass), inset 0 1px 0 rgba(255,255,255,.26);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:.4em;
  padding:5px 11px;
  border:1px solid var(--line-strong);
  border-radius:999px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--text-dim);
}
.tag--type{
  border-color:rgba(111,231,210,.4);
  background:rgba(111,231,210,.12);
  color:var(--cyan-300);
}
.tag--state{
  border-color:rgba(245,169,63,.42);
  background:rgba(245,169,63,.12);
  color:var(--amber-400);
}
.section--paper .tag{
  border-color:rgba(16,28,24,.2);
  color:var(--slate-600);
}

.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  aspect-ratio:16/10;
  border-radius:var(--radius-m);
  background:
    repeating-linear-gradient(115deg, rgba(230,241,234,.07) 0 2px, transparent 2px 9px),
    linear-gradient(150deg, var(--green-700), var(--ink-950));
  isolation:isolate;
}
.media-frame > img,
.media-frame > picture > img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:4/5}
.media-frame--phone{aspect-ratio:9/19.5;border-radius:34px}

.breadcrumbs{
  font-size:13px;
  color:var(--text-dim);
}
.breadcrumbs ol{
  display:flex;
  flex-wrap:wrap;
  gap:.5em;
}
.breadcrumbs li + li::before{
  content:"/";
  margin-right:.5em;
  color:rgba(243,241,232,.32);
}
.breadcrumbs a{transition:color .18s ease}
.breadcrumbs a:hover{color:var(--lime-200)}
.section--paper .breadcrumbs{color:var(--slate-600)}
.section--paper .breadcrumbs li + li::before{color:rgba(16,28,24,.3)}

.prose{
  max-width:68ch;
  font-size:17px;
  line-height:1.8;
}
.prose > * + *{margin-top:1.1em}
.prose h2{
  margin-top:2em;
  font-size:clamp(26px,3vw,34px);
}
.prose h3{
  margin-top:1.6em;
  font-size:22px;
}
.prose a{
  text-decoration:underline;
  text-decoration-thickness:1px;
  text-underline-offset:.22em;
}
.prose ul > li{
  position:relative;
  padding-left:1.4em;
  margin-top:.5em;
}
.prose ul > li::before{
  content:"";
  position:absolute;
  left:0;
  top:.8em;
  width:9px;
  height:1px;
  background:var(--lime-400);
}
.section--paper .prose ul > li::before{background:var(--slate-600)}

.toc{font-size:14px}
.toc-list{
  display:flex;
  flex-direction:column;
  gap:2px;
}
.toc a{
  display:block;
  padding:8px 0 8px 14px;
  border-left:2px solid rgba(230,241,234,.16);
  color:var(--text-dim);
  transition:color .18s ease,border-color .18s ease;
}
.toc a:hover{color:var(--paper-050)}
.toc a[aria-current="true"]{
  border-left-color:var(--lime-400);
  color:var(--lime-400);
}
.section--paper .toc a{
  border-left-color:rgba(16,28,24,.16);
  color:var(--slate-600);
}
.section--paper .toc a[aria-current="true"]{
  border-left-color:var(--ink-900);
  color:var(--ink-900);
}

.accordion{
  display:flex;
  flex-direction:column;
  gap:10px;
}
.accordion-item{
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--radius-s);
  background:rgba(230,241,234,.04);
}
.accordion-trigger{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  width:100%;
  padding:18px 20px;
  text-align:left;
  font-family:var(--font-display);
  font-weight:700;
  font-size:17px;
  line-height:1.4;
  cursor:pointer;
  transition:color .18s ease,background-color .18s ease;
}
.accordion-trigger:hover{
  color:var(--lime-200);
  background:rgba(199,247,63,.05);
}
.accordion-mark{
  position:relative;
  flex:0 0 auto;
  width:14px;
  height:14px;
}
.accordion-mark::before,
.accordion-mark::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  top:6px;
  height:1.5px;
  background:currentColor;
  transition:transform .22s ease;
}
.accordion-mark::after{transform:rotate(90deg)}
.accordion-item.is-open .accordion-mark::after{transform:rotate(0deg)}
.accordion-panel{
  display:grid;
  grid-template-rows:0fr;
  transition:grid-template-rows .24s ease;
}
.accordion-panel > *{
  min-height:0;
  overflow:hidden;
}
.accordion-item.is-open .accordion-panel{grid-template-rows:1fr}
.accordion-body{
  padding:0 20px 20px;
  font-size:15px;
  line-height:1.8;
  color:var(--text-dim);
}
.section--paper .accordion-item{
  background:rgba(16,28,24,.03);
  border-color:rgba(16,28,24,.14);
}
.section--paper .accordion-trigger:hover{
  color:var(--ink-900);
  background:rgba(16,28,24,.04);
}
.section--paper .accordion-body{color:var(--slate-600)}

/* ---------- 响应式 ---------- */
@media (min-width:901px){
  body{padding-right:var(--rail)}
}

@media (max-width:1000px){
  .foot-top{grid-template-columns:1fr}
  .span-4,.span-5,.span-6,.span-7,.span-8{grid-column:span 12}
}

@media (max-width:900px){
  .head-inner{
    grid-template-columns:1fr auto;
    padding:14px var(--gutter) 12px;
  }
  .head-imprint{display:none}
  .head-brand{
    justify-self:start;
    flex-direction:row;
    align-items:baseline;
    gap:8px;
  }
  .brand-cn{font-size:23px}
  .brand-latin{font-size:9px;letter-spacing:.34em;text-indent:.34em}
  .nav-toggle{display:inline-flex}

  .site-nav{
    border-top:0;
    max-height:0;
    opacity:0;
    overflow:hidden;
    transition:max-height .24s ease,opacity .2s ease,padding .2s ease;
  }
  .site-nav[data-open]{
    max-height:72vh;
    overflow-y:auto;
    opacity:1;
    padding-top:8px;
    padding-bottom:18px;
    border-top:1px solid rgba(230,241,234,.12);
  }
  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }
  .nav-list a{
    padding:15px 2px;
    font-size:16px;
    border-bottom:1px solid rgba(230,241,234,.1);
  }
  .nav-list a::after{display:none}

  .quick-rail{
    top:auto;
    bottom:0;
    left:0;
    right:0;
    transform:none;
    width:auto;
    flex-direction:row;
    border:0;
    border-top:1px solid rgba(199,247,63,.3);
    border-radius:0;
    background:rgba(7,18,15,.95);
  }
  .quick-rail a{
    flex:1;
    padding:14px 10px;
    writing-mode:horizontal-tb;
    text-align:center;
    font-size:13px;
    letter-spacing:.08em;
    border-bottom:0;
    border-right:1px solid rgba(230,241,234,.12);
  }
  .quick-rail a:nth-child(3){display:none}

  body{padding-bottom:58px}
  .bevel{clip-path:polygon(0 0,100% 0,100% calc(100% - 28px),0 100%)}
}

@media (max-width:760px){
  .foot-dirs{grid-template-columns:repeat(2,minmax(0,1fr))}
  .foot-contact{grid-template-columns:1fr 1fr}
}

@media (max-width:520px){
  .brand-latin{display:none}
  .head-actions .btn-sm{padding:9px 12px;font-size:12px}
  .nav-toggle-text{display:none}
  .nav-toggle{padding:10px 12px}
  .foot-dirs{grid-template-columns:1fr}
  .foot-contact{grid-template-columns:1fr}
  .foot-legal{flex-direction:column}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    transition-delay:0ms !important;
  }
  .btn:hover{transform:none}
}