:root{
  --anchor-blue:#12408F;
  --ink-blue:#0A1B33;
  --signal-orange:#FF4A1C;
  --electric-teal:#12D2C3;
  --teal-ink:#0E9E93;
  --lime-flash:#B8FF3C;
  --graphite:#1C1F24;
  --gray-500:#6C7683;
  --gray-100:#E7EAEE;
  --paper:#F7F9FB;
  --white:#FFFFFF;
  --amber:#FFB020;
  --line:rgba(10,27,51,.14);
  --line-strong:rgba(10,27,51,.28);
  --line-invert:rgba(231,234,238,.16);
  --rail-w:76px;
  --frame-h:68px;
  --status-h:34px;
  --page-max:1320px;
  --gutter:clamp(16px,3.4vw,44px);
  --sans:"Noto Sans SC",system-ui,-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--graphite);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5,p,figure,blockquote{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg{max-width:100%}
button{font:inherit;color:inherit}
a{color:var(--anchor-blue);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--signal-orange)}
:focus-visible{outline:2px solid var(--signal-orange);outline-offset:2px}
.skip-link{
  position:absolute;left:-9999px;top:0;z-index:200;
  padding:10px 18px;background:var(--signal-orange);color:#fff;
  font-weight:700;font-size:14px;text-decoration:none;
}
.skip-link:focus{left:0;color:#fff}

/* ---------- 布局工具 ---------- */
.container{width:100%;max-width:var(--page-max);margin:0 auto;padding-left:var(--gutter);padding-right:var(--gutter)}
.section{padding:clamp(40px,6vw,88px) 0}
.section--tight{padding:clamp(24px,3.2vw,48px) 0}
.rule{border:0;border-top:1px solid var(--line);margin:0}
.stack>*+*{margin-top:18px}
.grid-2,.grid-3{display:grid;gap:clamp(16px,2vw,28px);grid-template-columns:1fr}
.split{display:grid;grid-template-columns:1fr;border:1px solid var(--line);background:var(--white)}
.split>*{padding:clamp(14px,2vw,22px)}
.split>*+*{border-top:1px solid var(--line)}

/* ---------- 排版 ---------- */
.display-xl{font-size:clamp(2.4rem,7.4vw,7rem);font-weight:900;line-height:.94;letter-spacing:-.02em;color:var(--ink-blue)}
.display-l{font-size:clamp(1.8rem,4vw,3.2rem);font-weight:800;line-height:1.04;letter-spacing:-.015em;color:var(--ink-blue)}
.display-m{font-size:clamp(1.3rem,2.1vw,1.9rem);font-weight:800;line-height:1.2;letter-spacing:-.01em;color:var(--ink-blue)}
.lead{font-size:clamp(1.02rem,1.5vw,1.2rem);line-height:1.7;color:var(--ink-blue);max-width:48ch}
.muted{color:var(--gray-500)}
.prose{max-width:42em}
.prose p+p{margin-top:1em}
.mono,.mono-label,.stat-value,.contact-val,.footer-mono{
  font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:.04em;
}
.mono-label{font-size:12px;color:var(--gray-500)}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--mono);font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--gray-500);
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--electric-teal)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 18px;border:1px solid transparent;border-radius:2px;
  font-size:14px;font-weight:600;line-height:1;letter-spacing:.04em;
  text-decoration:none;cursor:pointer;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease;
}
.btn-signal{background:var(--signal-orange);color:#fff}
.btn-signal:hover{background:#E03C10;color:#fff}
.btn-ghost{border-color:var(--line-strong);color:var(--ink-blue);background:transparent}
.btn-ghost:hover{background:var(--ink-blue);border-color:var(--ink-blue);color:#fff}
.btn-blue{background:var(--anchor-blue);color:#fff}
.btn-blue:hover{background:#0C2F6C;color:#fff}
.btn-sm{padding:7px 12px;font-size:13px}

/* ---------- 标签 / 面板 / 读数 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:2px 8px;border:1px solid var(--line-strong);border-radius:2px;
  font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:var(--gray-500);background:var(--white);
}
.tag--teal{border-color:var(--teal-ink);color:var(--teal-ink)}
.tag--orange{border-color:var(--signal-orange);color:var(--signal-orange)}
.tag--lime{border-color:#8FCB2A;color:#5C7F14;background:rgba(184,255,60,.28)}
.panel{border:1px solid var(--line);background:var(--white)}
.panel-head{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:10px 14px;border-bottom:1px solid var(--line);background:var(--gray-100);
  font-family:var(--mono);font-size:12px;letter-spacing:.06em;color:var(--gray-500);
}
.panel-body{padding:14px}
.stat{display:flex;flex-direction:column;gap:4px}
.stat-value{font-size:clamp(1.4rem,2.6vw,2.1rem);font-weight:600;line-height:1;color:var(--ink-blue)}
.stat-value em{font-style:normal;color:var(--teal-ink)}
.stat-label{font-family:var(--mono);font-size:11px;letter-spacing:.14em;color:var(--gray-500)}

/* ---------- 图文容器（页面阶段放图） ---------- */
.media-frame{
  position:relative;display:block;width:100%;overflow:hidden;
  border:1px solid var(--line);background:var(--ink-blue);
}
.media-frame::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.55;
  background-image:
    linear-gradient(rgba(18,210,195,.16) 1px,transparent 1px),
    linear-gradient(90deg,rgba(18,210,195,.16) 1px,transparent 1px);
  background-size:32px 32px;
}
.media-frame>img{position:relative;display:block;width:100%;height:100%;object-fit:cover}
.media-frame--16x9{aspect-ratio:16/9}
.media-frame--4x3{aspect-ratio:4/3}
.media-frame--1x1{aspect-ratio:1/1}
.media-frame--3x4{aspect-ratio:3/4}
.media-frame--21x9{aspect-ratio:21/9}
.media-caption{
  margin-top:8px;font-family:var(--mono);font-size:11.5px;letter-spacing:.04em;color:var(--gray-500);
}

/* ---------- 面包屑 ---------- */
.breadcrumbs{font-family:var(--mono);font-size:12px;letter-spacing:.06em;color:var(--gray-500)}
.crumb-list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumb-list li{display:inline-flex;align-items:center;gap:8px}
.crumb-list li+li::before{content:"/";color:var(--line-strong)}
.crumb-list a{color:var(--gray-500);text-decoration:none}
.crumb-list a:hover{color:var(--anchor-blue);text-decoration:underline}

/* ---------- 头部：品牌轨道 + 框架导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--paper);border-bottom:1px solid var(--line-strong);
}
.brand-rail{display:none}
.frame{display:flex;flex-direction:column}
.frame-bar{
  position:relative;z-index:2;
  display:flex;align-items:center;gap:10px;
  min-height:var(--frame-h);padding:0 var(--gutter);
  border-bottom:1px solid var(--line);
}
.frame-brand{
  font-size:17px;font-weight:900;letter-spacing:.02em;color:var(--ink-blue);
  text-decoration:none;white-space:nowrap;
}
.nav-toggle{
  display:inline-flex;align-items:center;gap:9px;
  padding:8px 12px;border:1px solid var(--line-strong);border-radius:2px;
  background:var(--white);color:var(--ink-blue);cursor:pointer;
  font-size:13px;font-weight:600;letter-spacing:.06em;
}
.nav-toggle-lines{display:inline-flex;flex-direction:column;gap:3px;width:16px}
.nav-toggle-lines i{display:block;height:1.6px;background:currentColor;transition:transform .2s ease,opacity .2s ease}
body[data-nav-open] .nav-toggle-lines i:nth-child(1){transform:translateY(4.6px) rotate(45deg)}
body[data-nav-open] .nav-toggle-lines i:nth-child(2){opacity:0}
body[data-nav-open] .nav-toggle-lines i:nth-child(3){transform:translateY(-4.6px) rotate(-45deg)}
.site-nav{
  position:fixed;left:0;top:calc(var(--frame-h) + var(--status-h));bottom:0;
  width:min(86vw,340px);z-index:55;
  background:var(--ink-blue);border-right:1px solid rgba(18,210,195,.3);
  padding:10px 0 28px;overflow-y:auto;
  transform:translateX(-102%);
  transition:transform .28s cubic-bezier(.4,0,.2,1);
  box-shadow:10px 0 30px rgba(10,27,51,.3);
}
.site-nav[data-open]{transform:none}
.nav-list{counter-reset:navidx}
.nav-list li{border-bottom:1px solid var(--line-invert)}
.nav-link{
  position:relative;display:block;padding:14px 24px 16px;
  color:#E7EAEE;font-size:18px;font-weight:600;letter-spacing:.02em;text-decoration:none;
}
.nav-link::before{
  counter-increment:navidx;content:"0" counter(navidx);
  display:block;margin-bottom:4px;
  font-family:var(--mono);font-size:11px;letter-spacing:.16em;color:var(--electric-teal);
}
.nav-link:hover{background:rgba(255,255,255,.06);color:#fff}
.nav-link[aria-current="page"]{background:var(--anchor-blue);color:#fff;box-shadow:inset 3px 0 0 var(--electric-teal)}
.frame-actions{margin-left:auto;display:flex;align-items:center;gap:8px}
.frame-actions .btn-ghost{display:none}
.status-strip{
  display:flex;align-items:center;height:var(--status-h);
  padding:0 var(--gutter);background:var(--ink-blue);color:rgba(231,234,238,.78);
  font-family:var(--mono);font-size:12px;letter-spacing:.04em;white-space:nowrap;overflow-x:auto;
  scrollbar-width:none;
}
.status-strip::-webkit-scrollbar{display:none}
.status-item{display:inline-flex;align-items:center;gap:8px;padding:0 16px;flex:0 0 auto}
.status-item:first-child{padding-left:0}
.status-item+.status-item{border-left:1px solid var(--line-invert)}
.status-key{color:var(--electric-teal);letter-spacing:.1em}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink-blue);color:rgba(231,234,238,.78);
  border-top:3px solid var(--signal-orange);
}
.footer-grid{
  display:grid;grid-template-columns:1fr;gap:0;
  max-width:var(--page-max);margin:0 auto;padding:clamp(26px,4vw,54px) var(--gutter) 0;
}
.footer-col{padding:18px 0;border-top:1px solid var(--line-invert)}
.footer-col--brand{border-top:0}
.footer-col-title{
  margin-bottom:14px;font-family:var(--mono);font-size:12px;font-weight:600;
  letter-spacing:.16em;text-transform:uppercase;color:var(--electric-teal);
}
.footer-brand-mark{font-size:22px;font-weight:900;color:#fff;letter-spacing:.02em}
.footer-brand-line{font-size:14px;color:rgba(231,234,238,.62)}
.footer-mono{margin-top:10px;font-size:12px;color:var(--electric-teal);letter-spacing:.06em}
.footer-links{display:grid;gap:9px}
.footer-links a{
  color:rgba(231,234,238,.82);font-size:15px;text-decoration:none;
  border-bottom:1px solid transparent;transition:color .16s ease,border-color .16s ease;
}
.footer-links a:hover{color:#fff;border-bottom-color:var(--signal-orange)}
.contact-list{display:grid;gap:8px;margin-bottom:12px}
.contact-row{display:flex;flex-wrap:wrap;align-items:baseline;gap:8px;font-size:14px}
.contact-key{
  font-family:var(--mono);font-size:11px;letter-spacing:.12em;color:rgba(231,234,238,.5);
  min-width:34px;
}
.contact-val{font-size:13px;color:#fff;word-break:break-all}
.copy-btn{
  padding:2px 8px;border:1px solid var(--line-invert);border-radius:2px;
  background:transparent;color:rgba(231,234,238,.72);
  font-family:var(--mono);font-size:11px;letter-spacing:.08em;cursor:pointer;
  transition:background-color .16s ease,color .16s ease,border-color .16s ease;
}
.copy-btn:hover{border-color:var(--electric-teal);color:#fff}
.copy-btn[data-state="ok"]{background:var(--electric-teal);border-color:var(--electric-teal);color:var(--ink-blue)}
.copy-btn[data-state="fail"]{border-color:var(--amber);color:var(--amber)}
.footer-note{font-size:12.5px;line-height:1.7;color:rgba(231,234,238,.55);max-width:36ch}
.footer-bottom{
  max-width:var(--page-max);margin:clamp(22px,3vw,38px) auto 0;
  padding:14px var(--gutter);
  border-top:1px solid var(--line-invert);
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 24px;
  font-family:var(--mono);font-size:12px;letter-spacing:.04em;color:rgba(231,234,238,.6);
}
.footer-year{margin-left:auto}

/* ---------- 页内锚点索引高亮 ---------- */
[data-spy] a[aria-current]{color:var(--anchor-blue);border-left:2px solid var(--signal-orange);padding-left:10px}

/* ---------- 滚动显现 ---------- */
[data-motion="on"] [data-reveal]{
  opacity:0;transform:translateY(14px);
  transition:opacity .5s ease,transform .55s cubic-bezier(.2,.7,.3,1);
}
[data-motion="on"] [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 断点 ---------- */
@media (min-width:600px){
  .grid-2{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:repeat(2,1fr);column-gap:28px}
  .frame-actions .btn-ghost{display:inline-flex}
}
@media (min-width:860px){
  .split{grid-template-columns:1fr 1fr}
  .split>*+*{border-top:0;border-left:1px solid var(--line)}
}
@media (min-width:1000px){
  body{padding-left:var(--rail-w)}
  body[data-nav-open]{overflow:auto}
  .brand-rail{
    display:flex;position:fixed;left:0;top:0;bottom:0;width:var(--rail-w);
    flex-direction:column;align-items:center;justify-content:space-between;
    padding:20px 0 18px;background:var(--ink-blue);color:#E7EAEE;
    border-right:1px solid rgba(18,210,195,.28);z-index:70;
  }
  .rail-mark{
    writing-mode:vertical-rl;text-orientation:mixed;
    font-family:var(--mono);font-size:19px;font-weight:700;letter-spacing:.34em;color:#fff;
  }
  .rail-vert{
    writing-mode:vertical-rl;text-orientation:mixed;
    font-size:12px;letter-spacing:.2em;color:rgba(231,234,238,.66);
  }
  .rail-foot{display:flex;flex-direction:column;align-items:center;gap:12px}
  .rail-ver{
    font-family:var(--mono);font-size:11px;letter-spacing:.04em;color:var(--electric-teal);
    border:1px solid rgba(18,210,195,.45);padding:4px 2px;writing-mode:vertical-rl;
  }
  .rail-note{
    transform:rotate(180deg);writing-mode:vertical-rl;
    font-family:var(--mono);font-size:10.5px;letter-spacing:.28em;color:rgba(231,234,238,.4);
  }
  .rail-progress{position:absolute;top:0;bottom:0;right:0;width:3px;background:rgba(18,210,195,.16)}
  .rail-progress-bar{
    display:block;width:100%;height:100%;background:var(--electric-teal);
    transform-origin:top center;transform:scaleY(0);
  }
  .nav-toggle{display:none}
  .frame-brand{display:none}
  .site-nav{
    position:static;transform:none;width:auto;z-index:auto;
    background:transparent;border:0;box-shadow:none;padding:0;overflow:visible;
  }
  .nav-list{display:flex;flex-wrap:wrap;counter-reset:none}
  .nav-list li{border-bottom:0}
  .nav-link{
    padding:0 16px;line-height:var(--frame-h);font-size:15px;font-weight:600;
    color:var(--ink-blue);background:transparent;box-shadow:none;
    transition:color .16s ease,background-color .16s ease;
  }
  .nav-link::before{content:none}
  .nav-link::after{
    content:"";position:absolute;left:16px;right:16px;bottom:16px;height:1px;
    background:transparent;transition:background-color .16s ease;
  }
  .nav-link:hover{background:rgba(18,64,143,.06);color:var(--anchor-blue);box-shadow:none}
  .nav-link:hover::after{background:var(--anchor-blue)}
  .nav-link[aria-current="page"]{background:var(--anchor-blue);color:#fff;box-shadow:none}
  .nav-link[aria-current="page"]::after{left:0;right:0;bottom:0;height:3px;background:var(--electric-teal)}
  .status-strip{overflow:visible;padding-right:0}
}
@media (min-width:1100px){
  .grid-3{grid-template-columns:repeat(3,1fr)}
  .footer-grid{grid-template-columns:1.1fr .8fr .8fr .8fr 1.55fr;column-gap:0}
  .footer-col{border-top:0;border-left:1px solid var(--line-invert);padding:6px 24px}
  .footer-col--brand{border-left:0;padding-left:0}
}
@media (min-width:1280px){
  .frame-actions{gap:10px}
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }
  [data-motion="on"] [data-reveal]{opacity:1;transform:none}
}