:root{
  --bg-deep:#0A0E13;
  --bg-panel:#111820;
  --bg-card:#1C2733;
  --green-neon:#00E676;
  --blue-electric:#00B0FF;
  --orange-volt:#FF8C00;
  --white-main:#FFFFFF;
  --gray-sub:#B0C4DE;
  --gray-dim:#7A8B99;
  --line-border:#2E3B4E;
  --red-alert:#FF5252;
  --font-head:'Noto Sans SC','Microsoft YaHei',sans-serif;
  --font-body:'Noto Sans SC','PingFang SC',sans-serif;
  --font-mono:'Roboto Mono',monospace;
  --header-h:80px;
  --frame-max:1400px;
  --frame-pad:24px;
  --ease:cubic-bezier(.23,1,.32,1);
  --shadow-panel:0 12px 40px rgba(0,0,0,.4);
  --glass-blur:14px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  background:var(--bg-deep);
  color:var(--white-main);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  position:relative;
  min-height:100vh;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:
    radial-gradient(circle at 15% 20%,rgba(0,176,255,.04),transparent 34%),
    radial-gradient(circle at 80% 80%,rgba(0,230,118,.03),transparent 30%),
    linear-gradient(rgba(0,230,118,.02) 1px,transparent 1px),
    linear-gradient(90deg,rgba(0,230,118,.02) 1px,transparent 1px);
  background-size:auto,auto,46px 46px,46px 46px;
}
#main-content{
  position:relative;
  z-index:1;
  flex:1 0 auto;
}
img{max-width:100%;height:auto;display:block;}
a{
  color:var(--blue-electric);
  text-decoration:none;
  transition:color .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
}
a:hover{color:var(--green-neon);}
ul,ol{list-style:none;}
.site-frame{
  max-width:var(--frame-max);
  margin:0 auto;
  padding-left:var(--frame-pad);
  padding-right:var(--frame-pad);
}
.skip-link{
  position:fixed;
  top:-100px;
  left:16px;
  z-index:10000;
  padding:12px 24px;
  background:var(--green-neon);
  color:#000;
  font-weight:700;
  border-radius:0 0 4px 4px;
  transition:top .2s var(--ease);
}
.skip-link:focus-visible{
  top:0;
}
/* ===== Header ===== */
.site-header{
  position:sticky;
  top:0;
  z-index:2000;
  background:rgba(10,14,19,.86);
  -webkit-backdrop-filter:blur(10px);
          backdrop-filter:blur(10px);
  border-bottom:1px solid rgba(46,59,78,.7);
  transition:box-shadow .3s var(--ease),background .3s var(--ease);
}
.site-header[data-scrolled="true"]{
  background:rgba(10,14,19,.96);
  box-shadow:0 8px 32px rgba(0,0,0,.45);
}
.header-frame{
  display:flex;
  align-items:center;
  justify-content:space-between;
  min-height:var(--header-h);
  gap:16px;
  position:relative;
}
.header-left{
  display:flex;
  align-items:center;
  gap:20px;
  min-width:0;
}
.brand-core{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--white-main);
  font-family:var(--font-head);
  font-weight:900;
  font-size:1.15rem;
  letter-spacing:-.5px;
  line-height:1;
  text-transform:uppercase;
  position:relative;
}
.brand-core:hover{
  color:var(--green-neon);
}
.brand-mark{
  width:14px;
  height:14px;
  background:var(--green-neon);
  border-radius:2px 8px 2px 8px;
  box-shadow:0 0 18px rgba(0,230,118,.5);
  animation:breath 3s infinite alternate;
}
.brand-name{
  white-space:nowrap;
}
.brand-tagline{
  font-size:.68rem;
  font-weight:400;
  color:var(--gray-dim);
  letter-spacing:.4px;
  border:1px solid var(--line-border);
  padding:4px 8px 3px;
  border-radius:2px;
  white-space:nowrap;
  margin-left:4px;
}
.header-collect{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 14px;
  background:rgba(0,176,255,.08);
  border:1px solid rgba(0,176,255,.35);
  border-radius:4px;
  font-size:.82rem;
  font-weight:600;
  color:var(--blue-electric);
  transition:background .2s,box-shadow .2s,border-color .2s;
}
.header-collect:hover{
  background:rgba(0,176,255,.16);
  border-color:var(--blue-electric);
  box-shadow:0 0 20px rgba(0,176,255,.15);
}
.collect-icon{
  position:relative;
  width:16px;
  height:14px;
  border:2px solid var(--blue-electric);
  border-radius:2px 6px 2px 6px;
  display:inline-block;
  transition:transform .25s var(--ease);
}
.collect-icon::after{
  content:"";
  position:absolute;
  right:1px;
  top:4px;
  width:4px;
  height:10px;
  background:var(--bg-deep);
  border-left:2px solid var(--blue-electric);
  transform:rotate(18deg);
}
.header-collect:hover .collect-icon{
  transform:rotate(-4deg) scale(1.06);
}
.nav-panel{
  display:flex;
  align-items:center;
}
.nav-inner{
  display:flex;
  align-items:center;
  gap:6px;
}
.nav-panel a{
  position:relative;
  padding:10px 14px;
  font-size:.88rem;
  font-weight:500;
  color:var(--gray-sub);
  letter-spacing:.2px;
  overflow:hidden;
  border-bottom:2px solid transparent;
}
.nav-panel a::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:6px;
  width:0;
  height:2px;
  background:var(--green-neon);
  transition:width .3s var(--ease),left .3s var(--ease),box-shadow .3s;
  box-shadow:0 0 12px rgba(0,230,118,.7);
}
.nav-panel a:hover{
  color:var(--white-main);
}
.nav-panel a:hover::after,
.nav-panel a:focus-visible::after{
  width:calc(100% - 20px);
  left:10px;
}
.nav-panel a[aria-current="page"]{
  color:var(--green-neon);
  background:rgba(0,230,118,.08);
  border-radius:4px 4px 0 0;
}
.nav-panel a[aria-current="page"]::after{
  content:"";
  position:absolute;
  left:10px;
  right:10px;
  width:auto;
  bottom:0;
  background:var(--green-neon);
  box-shadow:0 0 16px rgba(0,230,118,.8);
}
.nav-toggle{
  display:none;
  flex-direction:column;
  justify-content:center;
  align-items:center;
  gap:5px;
  width:44px;
  height:44px;
  background:transparent;
  border:1px solid var(--line-border);
  border-radius:4px;
  cursor:pointer;
  transition:border-color .2s,background .2s;
  z-index:2020;
}
.nav-toggle:hover{
  border-color:var(--green-neon);
  background:rgba(0,230,118,.04);
}
.toggle-line{
  display:block;
  width:20px;
  height:2px;
  background:var(--white-main);
  transition:transform .3s var(--ease),opacity .2s,background .2s;
}
.nav-toggle[aria-expanded="true"] .toggle-line:nth-child(1){
  transform:translateY(7px) rotate(45deg);
  background:var(--green-neon);
}
.nav-toggle[aria-expanded="true"] .toggle-line:nth-child(2){
  opacity:0;
}
.nav-toggle[aria-expanded="true"] .toggle-line:nth-child(3){
  transform:translateY(-7px) rotate(-45deg);
  background:var(--green-neon);
}
/* ===== Footer ===== */
.site-footer{
  position:relative;
  z-index:2;
  background:var(--bg-panel);
  border-top:3px solid var(--green-neon);
  margin-top:80px;
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;
  right:0;
  width:360px;
  height:360px;
  background:radial-gradient(circle,rgba(0,230,118,.05),transparent 70%);
  pointer-events:none;
}
.footer-frame{
  padding-top:48px;
  padding-bottom:32px;
}
.footer-chord{
  display:grid;
  grid-template-columns:1.5fr .8fr 1fr .8fr;
  gap:32px;
  margin-bottom:36px;
}
.chord-block{
  font-size:.88rem;
  color:var(--gray-sub);
  line-height:1.7;
}
.chord-legend{
  display:flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-head);
  font-weight:700;
  font-size:.82rem;
  letter-spacing:1.2px;
  text-transform:uppercase;
  color:var(--white-main);
  margin-bottom:16px;
}
.legend-dot{
  width:10px;
  height:10px;
  background:var(--green-neon);
  border-radius:50%;
  box-shadow:0 0 12px rgba(0,230,118,.6);
  flex:0 0 auto;
}
.chord-block p{
  margin-bottom:12px;
}
.chord-block ul li{
  margin-bottom:9px;
  padding-left:14px;
  position:relative;
}
.chord-block ul li::before{
  content:"";
  position:absolute;
  left:0;
  top:11px;
  width:5px;
  height:5px;
  background:var(--blue-electric);
  clip-path:polygon(0 0,100% 50%,0 100%);
}
.chord-block ul li a{
  color:var(--gray-sub);
}
.chord-block ul li a:hover{
  color:var(--green-neon);
}
.trust-statement{
  font-size:.8rem;
  color:var(--gray-dim);
  border-left:2px solid var(--line-border);
  padding-left:12px;
}
.stamp-year{
  font-family:var(--font-mono);
  color:var(--green-neon);
  font-size:1rem;
  letter-spacing:.4px;
  margin-bottom:4px;
}
.stamp-inner{
  font-size:.8rem;
  color:var(--gray-dim);
}
.stamp-meta{
  color:var(--gray-dim);
  font-family:var(--font-mono);
  letter-spacing:.2px;
  margin-top:8px;
}
.footer-bottom{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:16px;
  border-top:1px solid var(--line-border);
  padding-top:20px;
  font-size:.78rem;
  color:var(--gray-dim);
  font-family:var(--font-mono);
}
.footer-icp{
  letter-spacing:.6px;
}
/* ===== Common Components ===== */
.body-container{
  max-width:960px;
  margin:0 auto;
}
.btn-ghost,.btn-solid{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:12px 26px;
  font-family:var(--font-head);
  font-weight:700;
  font-size:.92rem;
  letter-spacing:.4px;
  border-radius:4px;
  cursor:pointer;
  border:1px solid transparent;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s,border-color .2s;
}
.btn-ghost{
  background:transparent;
  border-color:var(--blue-electric);
  color:var(--blue-electric);
}
.btn-ghost:hover{
  color:var(--white-main);
  background:rgba(0,176,255,.1);
  box-shadow:0 0 24px rgba(0,176,255,.15);
  transform:translateY(-2px);
}
.btn-solid{
  background:var(--green-neon);
  color:#05100a;
  border-color:var(--green-neon);
}
.btn-solid:hover{
  background:var(--blue-electric);
  border-color:var(--blue-electric);
  box-shadow:0 0 28px rgba(0,176,255,.4);
  transform:translateY(-2px);
  color:#000;
}
.crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  font-size:.86rem;
  padding:14px 0;
  margin-bottom:24px;
  border-bottom:1px solid var(--line-border);
}
.crumb a{
  color:var(--gray-sub);
}
.crumb a:hover{
  color:var(--green-neon);
}
.crumb span{
  color:var(--gray-dim);
}
.grid-band{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:22px;
  margin-bottom:28px;
}
.data-card{
  background:rgba(28,39,51,.65);
  -webkit-backdrop-filter:blur(var(--glass-blur));
          backdrop-filter:blur(var(--glass-blur));
  border:1px solid var(--line-border);
  border-radius:6px;
  padding:20px;
  position:relative;
  transition:border-color .25s,box-shadow .25s,transform .25s var(--ease);
  overflow:hidden;
}
.data-card::before{
  content:"";
  position:absolute;
  top:10px;
  right:-22px;
  width:64px;
  height:64px;
  background:linear-gradient(135deg,transparent 50%,rgba(0,230,118,.08) 50%);
  transform:rotate(20deg);
  transition:background .3s;
}
.data-card:hover{
  border-color:rgba(0,230,118,.4);
  box-shadow:0 0 30px rgba(0,230,118,.08);
  transform:translateY(-2px);
}
.data-card__value{
  font-family:var(--font-mono);
  font-weight:700;
  font-size:2rem;
  color:var(--green-neon);
  line-height:1.2;
  letter-spacing:.5px;
}
.data-card__label{
  font-size:.82rem;
  color:var(--gray-dim);
  letter-spacing:.4px;
  margin-top:8px;
  text-transform:uppercase;
}
.glass-panel{
  background:rgba(17,24,32,.58);
  -webkit-backdrop-filter:blur(var(--glass-blur));
          backdrop-filter:blur(var(--glass-blur));
  border:1px solid rgba(46,59,78,.8);
  border-radius:8px;
  padding:24px;
  box-shadow:var(--shadow-panel);
}
.stat-line{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:12px 4px;
  border-bottom:1px solid var(--line-border);
  font-size:.9rem;
  font-family:var(--font-mono);
  transition:background .15s,padding .2s;
}
.stat-line:hover{
  background:rgba(0,230,118,.04);
  padding-left:8px;
  padding-right:8px;
}
.stat-line span:first-child{
  color:var(--gray-sub);
}
.stat-line span:last-child{
  color:var(--green-neon);
  font-weight:700;
}
.scene-background{
  position:absolute;
  inset:0;
  z-index:-1;
  overflow:hidden;
  pointer-events:none;
}
.scene-background::before{
  content:"";
  position:absolute;
  top:0;
  left:-120px;
  width:50%;
  height:100%;
  background:linear-gradient(120deg,rgba(255,140,0,.05),rgba(0,176,255,.05));
  transform:skewX(-12deg);
  border-right:1px solid rgba(0,230,118,.1);
}
.light-underline{
  background-image:linear-gradient(currentColor,currentColor);
  background-repeat:no-repeat;
  background-size:0 2px;
  background-position:left 90%;
  transition:background-size .3s var(--ease);
}
.light-underline:hover{
  background-size:100% 2px;
  color:var(--green-neon);
}
.to-top{
  position:fixed;
  bottom:28px;
  right:28px;
  z-index:3000;
  width:48px;
  height:48px;
  display:flex;
  align-items:center;
  justify-content:center;
  background:rgba(28,39,51,.75);
  -webkit-backdrop-filter:blur(8px);
          backdrop-filter:blur(8px);
  border:1px solid var(--line-border);
  cursor:pointer;
  color:var(--gray-sub);
  border-radius:4px;
  visibility:hidden;
  opacity:0;
  transform:translateY(12px);
  transition:opacity .2s,visibility .2s,transform .2s var(--ease),border-color .2s,color .2s,box-shadow .2s;
}
.to-top.visible{
  visibility:visible;
  opacity:1;
  transform:translateY(0);
}
.to-top:hover{
  border-color:var(--green-neon);
  color:var(--green-neon);
  box-shadow:0 0 24px rgba(0,230,118,.18);
}
.to-top svg{
  width:22px;
  height:22px;
  fill:none;
  stroke:currentColor;
  stroke-width:2;
  stroke-linecap:round;
  stroke-linejoin:round;
}
/* ===== Scroll progress ===== */
.tick-strip{
  position:fixed;
  top:0;
  left:0;
  height:3px;
  z-index:9999;
  background:linear-gradient(90deg,var(--green-neon),var(--blue-electric));
  transform-origin:left center;
  transform:scaleX(0);
  transition:transform .08s linear;
  pointer-events:none;
}
/* ===== Responsive ===== */
@media (max-width: 1024px){
  :root{
    --frame-pad:20px;
    --header-h:72px;
  }
  .footer-chord{
    grid-template-columns:1fr 1fr;
    gap:24px;
  }
  .nav-inner{
    gap:2px;
  }
  .nav-panel a{
    padding:10px 10px;
    font-size:.82rem;
  }
  .brand-tagline{
    display:none;
  }
}
@media (max-width: 768px){
  :root{
    --header-h:64px;
    --frame-pad:16px;
  }
  .header-frame{
    flex-wrap:wrap;
  }
  .nav-toggle{
    display:flex;
  }
  .header-left{
    gap:10px;
    flex:1 0 auto;
  }
  .header-collect{
    padding:6px 10px;
    font-size:.76rem;
  }
  .brand-name{
    font-size:1rem;
  }
  .nav-panel{
    position:fixed;
    top:var(--header-h);
    left:0;
    right:0;
    bottom:0;
    z-index:2010;
    background:rgba(10,14,19,.97);
    -webkit-backdrop-filter:blur(14px);
            backdrop-filter:blur(14px);
    width:100%;
    height:calc(100dvh - var(--header-h));
    display:block;
    overflow-y:auto;
    padding:24px 16px;
    opacity:0;
    visibility:hidden;
    transform:translateX(32px);
    transition:transform .4s var(--ease),opacity .3s,visibility .3s;
    border-top:1px solid var(--line-border);
  }
  .nav-panel[data-open="open"]{
    opacity:1;
    visibility:visible;
    transform:translateX(0);
  }
  .nav-inner{
    flex-direction:column;
    align-items:stretch;
    gap:6px;
  }
  .nav-panel a{
    font-size:1.05rem;
    padding:14px 16px;
    border-bottom:1px solid rgba(46,59,78,.5);
    border-radius:0;
    color:var(--gray-sub);
  }
  .nav-panel a:hover{
    background:rgba(0,230,118,.05);
    color:var(--white-main);
  }
  .nav-panel a::after{
    content:none;
  }
  .nav-panel a[aria-current="page"]{
    background:rgba(0,230,118,.1);
    color:var(--green-neon);
    border-radius:4px;
  }
  .footer-chord{
    grid-template-columns:1fr;
    gap:24px;
  }
  .footer-bottom{
    flex-direction:column;
    align-items:flex-start;
    gap:8px;
  }
  .grid-band{
    grid-template-columns:1fr;
    gap:16px;
  }
  .data-card{
    padding:16px;
  }
  .to-top{
    right:14px;
    bottom:14px;
    width:42px;
    height:42px;
  }
}
/* ===== Accessability / Motion ===== */
:focus-visible{
  outline:2px dashed var(--green-neon);
  outline-offset:3px;
}
@media (prefers-reduced-motion: reduce){
  *{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }
  body{
    cursor:auto;
  }
  .brand-mark{
    animation:none;
  }
}
@keyframes breath{
  0%{opacity:.7;box-shadow:0 0 8px rgba(0,230,118,.3);}
  100%{opacity:1;box-shadow:0 0 24px rgba(0,230,118,.7);}
}
/* 图片容器基础规则 */
.image-placeholder{
  background:linear-gradient(135deg,var(--bg-card),var(--bg-panel));
  border:1px dashed var(--line-border);
  border-radius:6px;
  min-height:160px;
  position:relative;
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--gray-dim);
  font-size:.82rem;
  overflow:hidden;
}
.image-placeholder::after{
  content:"";
  position:absolute;
  inset:8px;
  border:1px solid rgba(46,59,78,.4);
  border-radius:4px;
  pointer-events:none;
}
/* 响应式网格系统 */
.col-12{grid-column:span 12;}
.col-8{grid-column:span 8;}
.col-6{grid-column:span 6;}
.col-4{grid-column:span 4;}
.col-3{grid-column:span 3;}
@media (max-width: 768px){
  .col-12,.col-8,.col-6,.col-4,.col-3{grid-column:span 12;}
}
/* 收藏库角标动画 */
.collect-icon::before{
  content:"";
  position:absolute;
  left:-2px;
  top:-2px;
  width:8px;
  height:8px;
  background:var(--orange-volt);
  border-radius:50%;
  display:none;
}
.header-collect:hover .collect-icon::before{
  display:block;
}