:root{
  --night-900:#05090F;
  --night-800:#071426;
  --night-700:#0D2136;
  --line-blue:#253B52;
  --cyan:#39F5C8;
  --orange:#FF7A2D;
  --score:#FF3B30;
  --cool:#8CA3B8;
  --paper:#F4F7FA;
  --ink:#05090F;
  --turf:#0E5A45;

  --u:8px;
  --shell-max:1280px;
  --gutter:clamp(16px,3.4vw,44px);
  --border:2px solid var(--line-blue);
  --border-ink:3px solid var(--ink);
  --shadow-hard:8px 8px 0 var(--ink);
  --shadow-hard-sm:5px 5px 0 var(--ink);
  --ease:cubic-bezier(.22,.68,.2,1);

  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular","JetBrains Mono",Menlo,Consolas,"Liberation Mono",monospace;

  --fs-mono:.6875rem;
  --fs-small:.8125rem;
  --fs-body:clamp(15px,.28vw + 14px,16.5px);
  --fs-h3:clamp(18px,.7vw + 15.5px,21px);
  --fs-h2:clamp(26px,2.1vw + 17px,40px);
  --fs-h1:clamp(34px,4.4vw + 14px,68px);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:150px}
body{
  margin:0;
  background:var(--night-800);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:var(--fs-body);
  line-height:1.62;
  font-synthesis:none;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{font-weight:900;line-height:1.12;letter-spacing:.012em;margin:0}
p,figure,dl,dd,dt{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg{display:block;max-width:100%;height:auto}
button{font:inherit;color:inherit;background:none;border:0}
a{color:var(--cyan);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--paper)}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}

/* ---------- 容器与通用结构 ---------- */
.shell{width:100%;max-width:var(--shell-max);margin-inline:auto;padding-inline:var(--gutter)}

.blueprint-field{
  background-color:var(--night-800);
  background-image:
    linear-gradient(to right,rgba(37,59,82,.55) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(37,59,82,.55) 1px,transparent 1px);
  background-size:72px 72px;
  background-position:center top;
}

.divider-line{
  height:2px;
  border:0;
  margin:calc(var(--u)*4) 0;
  background:repeating-linear-gradient(90deg,var(--line-blue) 0 12px,transparent 12px 20px);
}

.section-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:var(--fs-mono);
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--cyan);
  margin-bottom:calc(var(--u)*1.5);
}
.section-eyebrow::before{content:"";width:18px;height:2px;background:var(--cyan)}

.index-number{
  font-family:var(--font-mono);
  font-size:var(--fs-mono);
  letter-spacing:.16em;
  color:var(--orange);
}

/* ---------- 网格 ---------- */
.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:calc(var(--u)*3);
}
.span-4{grid-column:span 4}
.span-5{grid-column:span 5}
.span-7{grid-column:span 7}
.span-12{grid-column:span 12}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:12px 22px;
  font-size:14.5px;
  font-weight:800;
  letter-spacing:.04em;
  text-decoration:none;
  border:2px solid var(--cyan);
  background:var(--cyan);
  color:var(--night-900);
  box-shadow:var(--shadow-hard-sm);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn:hover{
  color:var(--night-900);
  transform:translate(-2px,-2px);
  box-shadow:7px 7px 0 var(--ink);
}
.btn:active{transform:translate(2px,2px);box-shadow:2px 2px 0 var(--ink)}
.btn--solid{background:var(--orange);border-color:var(--orange);color:var(--night-900)}
.btn--solid:hover{background:var(--cyan);border-color:var(--cyan);color:var(--night-900)}
.btn--ghost{background:transparent;border-color:var(--line-blue);color:var(--paper);box-shadow:none}
.btn--ghost:hover{background:transparent;border-color:var(--cyan);color:var(--cyan);box-shadow:none;transform:translate(0,0)}

/* ---------- 面包屑 ---------- */
.breadcrumb{padding-block:calc(var(--u)*2)}
.breadcrumb-list{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  font-family:var(--font-mono);
  font-size:var(--fs-mono);
  letter-spacing:.08em;
  color:var(--cool);
}
.breadcrumb-item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb-link{color:var(--cool);text-decoration:none;border-bottom:1px solid transparent}
.breadcrumb-link:hover{color:var(--cyan);border-bottom-color:var(--cyan)}
.breadcrumb-sep{color:var(--line-blue)}
.breadcrumb-current{color:var(--paper)}

/* ---------- 正文 ---------- */
.prose{max-width:72ch;font-size:var(--fs-body);line-height:1.65;color:rgba(244,247,250,.86)}
.prose > * + *{margin-top:1.05em}
.prose h2{font-size:var(--fs-h2);color:var(--paper);margin-top:1.7em;line-height:1.15}
.prose h3{font-size:var(--fs-h3);color:var(--paper);margin-top:1.5em}
.prose a{color:var(--cyan)}
.prose ul,.prose ol{padding-left:1.4em;list-style:disc}
.prose li + li{margin-top:.4em}

/* ---------- 标签与数据 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 9px;
  font-family:var(--font-mono);
  font-size:.625rem;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--cool);
  background:rgba(13,33,54,.85);
  border:1px solid var(--line-blue);
}
.tag--cyan{color:var(--night-900);background:var(--cyan);border-color:var(--cyan)}
.tag--orange{color:var(--night-900);background:var(--orange);border-color:var(--orange)}
.tag--score{color:var(--score);background:rgba(255,59,48,.1);border-color:var(--score)}

.stat-num{
  display:block;
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum" 1;
  font-weight:800;
  font-size:clamp(30px,3.6vw,52px);
  line-height:1;
  letter-spacing:-.02em;
  color:var(--score);
}
.stat-label{
  display:block;
  margin-top:6px;
  font-family:var(--font-mono);
  font-size:var(--fs-mono);
  letter-spacing:.14em;
  color:var(--cool);
}

/* ---------- 面板 ---------- */
.panel{
  padding:calc(var(--u)*3);
  background:var(--night-700);
  border:2px solid var(--line-blue);
}
.panel--paper{
  background:var(--paper);
  color:var(--ink);
  border-color:var(--ink);
  box-shadow:var(--shadow-hard);
}
.panel--paper .stat-label,
.panel--paper .section-eyebrow{color:var(--turf)}

/* ---------- 图片容器 ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:16/9;
  background:var(--night-700);
  border:2px solid var(--line-blue);
}
.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(.92) contrast(1.08) brightness(.86);
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(158deg,rgba(7,20,38,.12),rgba(5,9,15,.74));
  pointer-events:none;
}
.media-frame--slant{
  clip-path:polygon(0 0,100% 0,100% calc(100% - 34px),calc(100% - 34px) 100%,0 100%);
}
.media-frame--portrait{aspect-ratio:4/5}
.figure-caption{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:var(--fs-mono);
  letter-spacing:.1em;
  color:var(--cool);
}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;
  top:-140px;
  left:var(--gutter);
  z-index:200;
  display:inline-flex;
  align-items:center;
  padding:10px 18px;
  background:var(--cyan);
  color:var(--night-900);
  font-size:14px;
  font-weight:800;
  text-decoration:none;
  border:var(--border-ink);
  box-shadow:var(--shadow-hard-sm);
  transition:top .16s var(--ease);
}
.skip-link:focus{top:10px;color:var(--night-900)}

/* ---------- 页头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:90;
  background:var(--night-800);
  border-bottom:2px solid var(--line-blue);
  transition:box-shadow .2s var(--ease);
}
.site-header[data-scrolled="true"]{box-shadow:0 14px 30px rgba(5,9,15,.7)}

.header-utility{
  background:var(--night-900);
  border-bottom:1px solid rgba(37,59,82,.9);
}
.utility-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:4px calc(var(--u)*2);
  padding-block:7px;
  font-family:var(--font-mono);
  font-size:var(--fs-mono);
  letter-spacing:.06em;
  color:var(--cool);
}
.utility-brand{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.utility-tag{
  padding:2px 7px;
  color:var(--cyan);
  border:1px solid rgba(57,245,200,.45);
  letter-spacing:.16em;
}
.utility-tagline{color:rgba(244,247,250,.76)}
.utility-contact{display:flex;flex-wrap:wrap;gap:4px 18px}
.utility-item{display:inline-flex;align-items:baseline;gap:6px;color:rgba(244,247,250,.82)}
.utility-key{color:rgba(140,163,184,.72);letter-spacing:.14em}
.utility-item--muted{color:rgba(140,163,184,.85)}

.nav-bar{
  position:relative;
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto;
  align-items:stretch;
  background-image:linear-gradient(112deg,transparent 56%,rgba(37,59,82,.38) 56.2%,rgba(37,59,82,.38) 60%,transparent 60.2%);
}

.brand{
  display:flex;
  align-items:center;
  gap:12px;
  min-width:0;
  padding-block:12px;
  padding-right:clamp(12px,2vw,26px);
  color:var(--paper);
  text-decoration:none;
}
.brand:hover{color:var(--paper)}
.brand-mark{
  flex:0 0 44px;
  width:44px;
  height:44px;
  display:grid;
  place-items:center;
  background:var(--cyan);
  color:var(--night-900);
  font-size:22px;
  font-weight:900;
  line-height:1;
  clip-path:polygon(0 0,100% 0,100% 66%,66% 100%,0 100%);
}
.brand-text{display:block;min-width:0}
.brand-name{
  display:block;
  font-size:clamp(18px,1.4vw,21px);
  font-weight:900;
  letter-spacing:.08em;
  line-height:1.15;
}
.brand-sub{
  display:block;
  margin-top:3px;
  font-family:var(--font-mono);
  font-size:.5938rem;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--cool);
  white-space:nowrap;
}

.site-nav{display:flex;justify-content:flex-end;align-items:stretch;min-width:0}
.nav-list{
  display:flex;
  align-items:stretch;
  min-width:0;
  overflow-x:auto;
  scrollbar-width:none;
}
.nav-list::-webkit-scrollbar{display:none}
.nav-item{display:flex;flex:0 0 auto}
.nav-link{
  position:relative;
  display:flex;
  flex-direction:column;
  justify-content:center;
  gap:2px;
  padding:10px clamp(9px,1.1vw,18px);
  color:var(--cool);
  text-decoration:none;
  border-left:1px solid rgba(37,59,82,.8);
  transition:color .18s var(--ease),background-color .18s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:3px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .18s var(--ease);
}
.nav-index{
  font-family:var(--font-mono);
  font-size:.5625rem;
  letter-spacing:.18em;
  color:rgba(140,163,184,.55);
  transition:color .18s var(--ease);
}
.nav-text{
  font-size:clamp(13px,.9vw,14.5px);
  font-weight:600;
  letter-spacing:.04em;
  white-space:nowrap;
}
.nav-link:hover{color:var(--paper);background:rgba(13,33,54,.9)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{
  color:var(--paper);
  background:rgba(57,245,200,.08);
}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}
.nav-link[aria-current="page"] .nav-index{color:var(--cyan)}

.cta-link{
  align-self:center;
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-left:clamp(10px,1.4vw,20px);
  padding:10px 16px;
  background:var(--orange);
  color:var(--night-900);
  font-size:13.5px;
  font-weight:800;
  letter-spacing:.04em;
  text-decoration:none;
  border:2px solid var(--ink);
  box-shadow:4px 4px 0 rgba(5,9,15,.9);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background-color .18s var(--ease);
}
.cta-link:hover{color:var(--night-900);background:var(--cyan);transform:translate(-2px,-2px);box-shadow:6px 6px 0 rgba(5,9,15,.9)}
.cta-link:active{transform:translate(2px,2px);box-shadow:2px 2px 0 rgba(5,9,15,.9)}
.cta-link-arrow{font-family:var(--font-mono);font-size:14px}

.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  align-self:center;
  justify-self:end;
  margin-block:10px;
  padding:9px 11px;
  background:transparent;
  color:var(--paper);
  border:2px solid var(--line-blue);
  cursor:pointer;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle-icon{display:flex;flex-direction:column;gap:3px;width:18px}
.nav-toggle-bar{
  display:block;
  height:2px;
  width:100%;
  background:currentColor;
  transition:transform .18s var(--ease),opacity .18s var(--ease);
}
.nav-toggle-text{font-family:var(--font-mono);font-size:.625rem;letter-spacing:.16em}
.site-header[data-open="true"] .nav-toggle{border-color:var(--cyan);color:var(--cyan)}
.site-header[data-open="true"] .nav-toggle-bar:nth-child(1){transform:translateY(5px) rotate(45deg)}
.site-header[data-open="true"] .nav-toggle-bar:nth-child(2){opacity:0}
.site-header[data-open="true"] .nav-toggle-bar:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

.scroll-meter{
  height:3px;
  background:rgba(37,59,82,.65);
  overflow:hidden;
}
.scroll-meter-fill{
  display:block;
  width:100%;
  height:100%;
  background:linear-gradient(90deg,var(--cyan),var(--orange));
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform .12s linear;
}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,7vw,96px);
  background:var(--night-900);
  border-top:3px solid var(--line-blue);
  color:var(--paper);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-3px;
  left:0;
  width:min(38%,320px);
  height:3px;
  background:var(--cyan);
}
.site-footer::after{
  content:"";
  position:absolute;
  top:-3px;
  left:min(38%,320px);
  width:96px;
  height:3px;
  background:var(--orange);
}
.footer-inner{padding-block:clamp(32px,4vw,56px) 22px}

.footer-head{
  display:grid;
  grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);
  gap:clamp(24px,4vw,56px);
  padding-bottom:calc(var(--u)*4);
  border-bottom:1px solid rgba(37,59,82,.8);
}
.footer-kicker{
  font-family:var(--font-mono);
  font-size:var(--fs-mono);
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--cyan);
  margin-bottom:calc(var(--u)*1.5);
}
.footer-statement{
  font-size:clamp(24px,2.8vw,40px);
  font-weight:900;
  line-height:1.16;
  letter-spacing:.01em;
  max-width:16ch;
}
.footer-label{
  font-family:var(--font-mono);
  font-size:var(--fs-mono);
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--orange);
  margin-bottom:calc(var(--u)*1.5);
}
.contact-list{display:grid;gap:10px;font-size:var(--fs-small)}
.contact-list > div{
  display:grid;
  grid-template-columns:64px minmax(0,1fr);
  gap:10px;
  align-items:baseline;
  padding-top:8px;
  border-top:1px solid rgba(37,59,82,.75);
}
.contact-key{
  font-family:var(--font-mono);
  font-size:.5938rem;
  letter-spacing:.16em;
  color:var(--cool);
}
.contact-value{color:rgba(244,247,250,.9);word-break:break-word}

.footer-columns{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:clamp(20px,3vw,40px);
  padding-block:calc(var(--u)*4);
  border-bottom:1px solid rgba(37,59,82,.8);
}
.footer-col{min-width:0}
.footer-col-title{
  font-family:var(--font-mono);
  font-size:var(--fs-mono);
  font-weight:600;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--orange);
  margin-bottom:calc(var(--u)*1.5);
}
.footer-links{display:grid;gap:9px}
.footer-link{
  display:inline-block;
  color:rgba(244,247,250,.82);
  font-size:14px;
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-link:hover,.footer-link:focus-visible{color:var(--cyan);border-bottom-color:var(--cyan)}
.footer-note{
  padding-left:14px;
  border-left:2px solid var(--line-blue);
  font-size:12.5px;
  line-height:1.6;
  color:rgba(140,163,184,.95);
}

.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px calc(var(--u)*3);
  padding-top:18px;
  font-family:var(--font-mono);
  font-size:var(--fs-mono);
  letter-spacing:.08em;
  color:rgba(140,163,184,.9);
}
.footer-copy{color:rgba(244,247,250,.7)}
.footer-icp{color:rgba(140,163,184,.9)}
.to-top{
  padding:8px 14px;
  font-family:var(--font-mono);
  font-size:.625rem;
  letter-spacing:.14em;
  color:var(--paper);
  background:transparent;
  border:2px solid var(--line-blue);
  cursor:pointer;
  transition:color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.to-top:hover{color:var(--cyan);border-color:var(--cyan);transform:translateY(-2px)}

/* ---------- 响应式：平板 ---------- */
@media (max-width:1180px){
  .span-4{grid-column:span 6}
  .footer-columns{grid-template-columns:repeat(2,minmax(0,1fr))}
}

/* ---------- 响应式：移动端页头 ---------- */
@media (max-width:900px){
  html{scroll-padding-top:112px}
  .nav-bar{grid-template-columns:minmax(0,1fr) auto}
  .nav-toggle{display:inline-flex}
  .cta-link{display:none}
  .site-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    z-index:80;
    display:none;
    justify-content:flex-start;
    background:var(--night-900);
    border-top:2px solid var(--line-blue);
    border-bottom:2px solid var(--line-blue);
    box-shadow:0 20px 44px rgba(5,9,15,.8);
    max-height:calc(100vh - 128px);
    overflow-y:auto;
    overscroll-behavior:contain;
  }
  .site-header[data-open="true"] .site-nav{display:block}
  .nav-list{flex-direction:column;align-items:stretch;overflow:visible}
  .nav-item{display:block}
  .nav-link{
    flex-direction:row;
    align-items:baseline;
    gap:12px;
    padding:14px var(--gutter);
    border-left:0;
    border-bottom:1px solid rgba(37,59,82,.7);
  }
  .nav-link::after{
    left:0;
    right:auto;
    top:0;
    bottom:0;
    width:4px;
    height:auto;
    transform:scaleY(0);
    transform-origin:center top;
  }
  .nav-link:hover::after,
  .nav-link[aria-current="page"]::after{transform:scaleY(1)}
  .nav-text{font-size:15px}
  .nav-index{font-size:.5938rem}

  .footer-head{grid-template-columns:minmax(0,1fr)}
  .footer-statement{max-width:none}
  .utility-inner{justify-content:flex-start}
  .utility-item--muted{display:none}
}

@media (max-width:640px){
  .span-4,.span-5,.span-7{grid-column:span 12}
  .grid-12{gap:calc(var(--u)*2.5)}
  .utility-contact .utility-item:nth-child(2){display:none}
  .footer-columns{grid-template-columns:minmax(0,1fr)}
  .footer-base{flex-direction:column;align-items:flex-start}
  .brand-sub{display:none}
  .brand-mark{flex-basis:38px;width:38px;height:38px;font-size:19px}
  .panel{padding:calc(var(--u)*2.5)}
}

/* ---------- 减少动态 ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .scroll-meter-fill{transition:none}
  .btn:hover,.cta-link:hover,.to-top:hover{transform:none}
}