/* ============ 1. 重置 ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd,fieldset{margin:0;padding:0}
ul,ol{list-style:none}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
hr{border:0}
:focus-visible{outline:3px solid var(--cyan);outline-offset:3px}

/* ============ 2. 设计变量 ============ */
:root{
  --ink-900:#090E24;
  --ink-800:#111827;
  --ink-700:#1E3A3A;
  --paper:#F2E9DA;
  --warm:#FFF7EC;
  --mist:#C9D2E0;
  --mist-dim:#8A94A8;
  --signal:#FF6B2A;
  --cyan:#34F5D0;
  --blue:#5B7CFF;
  --line:rgba(201,210,224,.22);
  --line-strong:rgba(201,210,224,.55);
  --ease:160ms cubic-bezier(.2,.7,.3,1);
  --font-display:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:var(--font-display);
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Source Han Mono","Noto Sans Mono",monospace;
  --wrap-max:1240px;
  --gut:clamp(16px,4vw,40px);
}

/* ============ 3. 基础排版 ============ */
body{
  min-height:100vh;
  display:flex;
  flex-direction:column;
  background:var(--ink-900);
  color:var(--warm);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
#main-content{flex:1 0 auto;display:block}
#main-content:focus-visible{outline:3px solid var(--cyan);outline-offset:-3px}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.16;
  letter-spacing:-.015em;
  text-wrap:balance;
}
h1{font-size:clamp(30px,5vw,58px)}
h2{font-size:clamp(24px,3.4vw,38px)}
h3{font-size:clamp(18px,2vw,24px)}
h4{font-size:18px}
p{text-wrap:pretty}
strong{font-weight:700}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.muted{color:var(--mist-dim)}

/* ============ 4. 布局骨架 ============ */
.wrap{width:100%;max-width:var(--wrap-max);margin-inline:auto;padding-inline:var(--gut)}
.section{padding-block:clamp(40px,6vw,80px)}
.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:16px;margin-bottom:clamp(20px,3vw,32px);padding-bottom:14px;
  border-bottom:2px solid var(--ink-700);
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:12px;font-weight:700;
  letter-spacing:.18em;text-transform:uppercase;color:var(--cyan);
}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--signal);flex:0 0 auto}
.lede{font-size:clamp(16px,1.6vw,19px);line-height:1.8;color:var(--mist);max-width:64ch}
.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid-12{grid-template-columns:repeat(12,minmax(0,1fr))}
.col-4{grid-column:span 4}
.col-5{grid-column:span 5}
.col-6{grid-column:span 6}
.col-7{grid-column:span 7}
.col-8{grid-column:span 8}
.col-12{grid-column:span 12}
.stack{display:flex;flex-direction:column;gap:14px}
.divider{height:2px;background:var(--ink-700);margin-block:clamp(24px,4vw,48px)}

/* ============ 5. 按钮 / 标签 / 状态灯 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:10px 22px;
  font-family:var(--font-display);font-weight:700;font-size:14px;letter-spacing:.04em;
  line-height:1.2;text-align:center;border:2px solid transparent;border-radius:0;
  transition:transform var(--ease),background-color var(--ease),color var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.btn--sm{
  min-height:36px;padding:5px 12px;
  font-family:var(--font-mono);font-size:12px;font-weight:700;letter-spacing:.1em;
}
.btn--signal{background:var(--signal);color:var(--ink-900);border-color:var(--signal);box-shadow:3px 3px 0 rgba(9,14,36,.9)}
.btn--signal:hover{background:var(--warm);border-color:var(--warm);color:var(--ink-900);transform:translate(-1px,-1px);box-shadow:5px 5px 0 var(--cyan)}
.btn--ghost{background:transparent;color:var(--warm);border-color:var(--line-strong)}
.btn--ghost:hover{background:var(--ink-700);border-color:var(--cyan);color:var(--warm)}
.btn--cyan{background:var(--cyan);color:var(--ink-900);border-color:var(--cyan);box-shadow:4px 4px 0 rgba(9,14,36,.85)}
.btn--cyan:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--signal)}
.btn--paper{background:var(--paper);color:var(--ink-900);border-color:var(--ink-900);box-shadow:4px 4px 0 var(--blue)}
.btn--paper:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--signal)}
.lamp{
  width:8px;height:8px;flex:0 0 auto;background:var(--cyan);border-radius:1px;
  box-shadow:0 0 0 2px rgba(52,245,208,.22),0 0 10px rgba(52,245,208,.7);
  animation:lamp-pulse 2.6s ease-in-out infinite;
}
@keyframes lamp-pulse{
  0%,100%{box-shadow:0 0 0 2px rgba(52,245,208,.22),0 0 10px rgba(52,245,208,.7)}
  50%{box-shadow:0 0 0 2px rgba(52,245,208,.1),0 0 4px rgba(52,245,208,.35)}
}
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:3px 8px;
  font-family:var(--font-mono);font-size:11px;font-weight:700;letter-spacing:.12em;
  color:var(--mist);background:rgba(201,210,224,.06);border:1px solid var(--line-strong);
}
.tag--cyan{color:var(--cyan);border-color:var(--cyan)}
.tag--signal{color:var(--ink-900);background:var(--signal);border-color:var(--signal)}

/* ============ 6. 面板 / 卡片 / 表格 / 图片容器 ============ */
.panel{background:var(--ink-800);border:2px solid var(--ink-700);padding:clamp(18px,2.6vw,28px)}
.panel--paper{background:var(--paper);color:#111827;border-color:#111827;box-shadow:6px 6px 0 var(--blue)}
.card{
  display:block;background:var(--ink-800);border:2px solid var(--ink-700);
  padding:clamp(16px,2vw,22px);
  transition:border-color var(--ease),transform var(--ease),box-shadow var(--ease);
}
.card:hover,.card:focus-within{border-color:var(--cyan);transform:translate(-2px,-2px);box-shadow:5px 5px 0 var(--signal)}
.table-wrap{overflow-x:auto;border:2px solid var(--ink-700);background:var(--ink-800)}
.data-table{width:100%;min-width:520px;font-size:14px}
.data-table th,.data-table td{padding:10px 14px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}
.data-table thead th{
  background:var(--ink-900);color:var(--cyan);white-space:nowrap;
  font-family:var(--font-mono);font-size:11px;font-weight:700;letter-spacing:.14em;
}
.data-table tbody tr:last-child td{border-bottom:0}
.data-table tbody tr:hover{background:rgba(52,245,208,.06)}
.data-table td:first-child{font-family:var(--font-mono);color:var(--warm);white-space:nowrap}
.media{
  position:relative;display:block;overflow:hidden;
  background:var(--ink-700);border:2px solid var(--ink-700);
  box-shadow:8px 8px 0 rgba(17,24,39,.9);
}
.media img{width:100%;height:100%;object-fit:cover;display:block}
.media--16x9{aspect-ratio:16/9}
.media--4x3{aspect-ratio:4/3}
.media--1x1{aspect-ratio:1/1}
.media--wide{aspect-ratio:21/9}
.media--placeholder{
  background-color:var(--ink-800);
  background-image:repeating-linear-gradient(135deg,rgba(52,245,208,.10) 0 2px,transparent 2px 12px);
}
.media-caption{margin-top:10px;font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--mist-dim)}

/* ============ 7. 面包屑 / 跳转 ============ */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:200;
  transform:translateY(-180%);
  padding:12px 18px;background:var(--cyan);color:var(--ink-900);
  font-family:var(--font-mono);font-size:13px;font-weight:700;letter-spacing:.08em;
  border:2px solid var(--ink-900);box-shadow:4px 4px 0 var(--signal);
  transition:transform var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{transform:translateY(0)}
.breadcrumb{
  padding-block:18px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--mist-dim);
}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:6px}
.breadcrumb li{display:flex;align-items:center;gap:6px}
.breadcrumb li:not(:last-child)::after{content:"/";color:#3d4a63}
.breadcrumb a{color:var(--mist);border-bottom:1px solid transparent;transition:color var(--ease),border-color var(--ease)}
.breadcrumb a:hover{color:var(--cyan);border-bottom-color:var(--cyan)}

/* ============ 8. 页头 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--ink-900);
  border-bottom:2px solid var(--ink-700);
}
.scroll-meter{
  position:absolute;left:0;bottom:-2px;width:100%;height:3px;
  background:rgba(201,210,224,.14);pointer-events:none;
}
.scroll-meter-fill{
  display:block;height:100%;width:0;
  background:var(--signal);box-shadow:0 0 10px rgba(255,107,42,.7);
  transition:width 120ms linear;
}
.header-band{background:var(--ink-800);border-bottom:1px solid var(--ink-700)}
.band-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:14px;min-height:44px;padding-block:6px;
}
.band-status{
  display:inline-flex;align-items:center;gap:8px;margin:0;
  font-family:var(--font-mono);font-size:12px;font-weight:700;
  letter-spacing:.08em;color:var(--mist);white-space:nowrap;
}
.band-status-more{font-weight:400;color:var(--mist-dim)}
.band-meta{
  margin-left:auto;margin-right:0;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  color:var(--mist-dim);white-space:nowrap;
}
.band-actions{display:flex;align-items:center;gap:8px;margin-left:auto}
.header-main{background:var(--ink-900)}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:18px;padding-block:12px;
}
.brand{
  position:relative;display:inline-flex;align-items:center;gap:12px;
  padding-left:12px;min-height:48px;
}
.brand::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:4px;height:34px;background:var(--signal);
}
.brand-mark{
  display:grid;place-items:center;flex:0 0 auto;
  width:42px;height:42px;
  background:var(--ink-800);border:2px solid var(--cyan);color:var(--cyan);
  font-family:var(--font-mono);font-size:14px;font-weight:700;letter-spacing:.06em;
  box-shadow:3px 3px 0 var(--signal);
  transition:transform var(--ease),box-shadow var(--ease);
}
.brand:hover .brand-mark{transform:translate(-1px,-1px);box-shadow:5px 5px 0 var(--signal)}
.brand-text{display:flex;flex-direction:column;gap:1px;min-width:0}
.brand-name{
  font-family:var(--font-display);font-size:17px;font-weight:800;
  letter-spacing:.08em;line-height:1.25;color:var(--warm);
}
.brand-descriptor{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;
  color:var(--mist-dim);line-height:1.4;
}
.nav-toggle{
  display:none;align-items:center;gap:10px;min-height:48px;padding:0 14px;
  background:var(--ink-800);border:2px solid var(--line-strong);color:var(--warm);
  font-family:var(--font-mono);font-size:12px;font-weight:700;letter-spacing:.14em;
  transition:background-color var(--ease),border-color var(--ease),color var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle-label{line-height:1}
.nav-toggle-bars{position:relative;width:18px;height:2px;background:currentColor;transition:background-color var(--ease)}
.nav-toggle-bars::before,.nav-toggle-bars::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;
  transition:transform var(--ease);
}
.nav-toggle-bars::before{top:-6px}
.nav-toggle-bars::after{top:6px}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after{transform:translateY(-6px) rotate(-45deg)}
.site-nav{display:flex;align-items:center}
.nav-list{display:flex;align-items:center;gap:4px}
.site-nav a{
  display:flex;align-items:center;min-height:40px;padding:8px 12px;
  font-size:14px;font-weight:500;letter-spacing:.03em;color:var(--mist);
  border:2px solid transparent;border-radius:0;
  transition:color var(--ease),background-color var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.site-nav a:hover{
  color:var(--warm);background:var(--ink-800);
  border-color:var(--ink-700);box-shadow:inset 0 -2px 0 var(--cyan);
}
.site-nav a[aria-current="page"]{
  background:var(--signal);border-color:var(--signal);color:var(--ink-900);
  font-weight:700;box-shadow:3px 3px 0 rgba(9,14,36,.85);
}

/* ============ 9. 页脚 ============ */
.site-footer{
  position:relative;margin-top:clamp(32px,5vw,64px);
  background:var(--ink-800);border-top:2px solid var(--ink-700);
}
.site-footer::before{
  content:"";position:absolute;top:-2px;left:0;
  width:min(38%,260px);height:2px;background:var(--signal);
}
.footer-inner{padding-block:clamp(32px,5vw,60px) 24px}
.footer-top{
  display:grid;grid-template-columns:minmax(240px,1fr) 1.4fr;
  gap:clamp(24px,4vw,56px);align-items:start;
  padding-bottom:clamp(24px,3vw,40px);border-bottom:1px solid var(--line);
}
.footer-brandcol{min-width:0}
.footer-brand{display:inline-flex;align-items:center;gap:10px;min-height:44px}
.footer-mark{
  display:grid;place-items:center;flex:0 0 auto;
  width:38px;height:38px;
  background:var(--ink-900);border:2px solid var(--cyan);color:var(--cyan);
  font-family:var(--font-mono);font-size:13px;font-weight:700;letter-spacing:.06em;
  box-shadow:3px 3px 0 var(--signal);
}
.footer-name{
  font-family:var(--font-display);font-size:18px;font-weight:800;
  letter-spacing:.08em;color:var(--warm);
}
.footer-summary{margin-top:14px;max-width:34ch;font-size:14px;line-height:1.8;color:var(--mist)}
.footer-mono{margin-top:12px;font-size:12px;letter-spacing:.14em;color:var(--mist-dim)}
.footer-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(16px,2.5vw,32px)}
.footer-col{min-width:0}
.footer-col-title{
  margin-bottom:12px;padding-bottom:10px;
  font-family:var(--font-mono);font-size:11px;font-weight:700;letter-spacing:.2em;
  color:var(--signal);border-bottom:1px solid var(--line);
}
.footer-links{display:flex;flex-direction:column;gap:2px}
.footer-links a{
  display:inline-flex;align-items:center;min-height:40px;
  font-size:14px;color:var(--mist);
  border-bottom:1px solid transparent;
  transition:color var(--ease),border-color var(--ease);
}
.footer-links a:hover{color:var(--cyan);border-bottom-color:var(--cyan)}
.footer-contact{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));
  gap:18px 28px;margin-top:clamp(24px,3vw,40px);
  padding:clamp(18px,2.5vw,26px);
  background:var(--paper);color:var(--ink-900);
  border:2px solid var(--ink-900);
  box-shadow:8px 8px 0 rgba(255,107,42,.9);
}
.footer-contact-item{display:flex;flex-direction:column;gap:4px;min-width:0}
.footer-contact-label{
  font-family:var(--font-mono);font-size:11px;font-weight:700;
  letter-spacing:.18em;color:#5B5347;
}
.footer-contact-value{
  font-size:14px;font-weight:600;line-height:1.55;
  color:var(--ink-900);word-break:break-word;
}
.footer-meta{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:10px 20px;margin-top:clamp(28px,4vw,44px);padding-top:18px;
  border-top:1px dashed var(--line);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;color:var(--mist-dim);
}
.footer-icp{color:var(--mist)}
.footer-note{color:var(--mist-dim)}

/* ============ 10. 响应式 ============ */
@media (max-width:1100px){
  .footer-top{grid-template-columns:1fr;gap:clamp(24px,4vw,36px)}
  .footer-summary{max-width:52ch}
}
@media (max-width:940px){
  .site-header{position:sticky}
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;left:0;right:0;top:100%;z-index:85;
    display:none;background:var(--ink-800);
    border-top:2px solid var(--ink-700);border-bottom:2px solid var(--signal);
    padding:10px var(--gut) 18px;
    max-height:calc(100vh - 140px);overflow-y:auto;
    box-shadow:0 20px 0 -14px rgba(52,245,208,.45);
  }
  .site-nav[data-open]{display:block}
  .nav-list{flex-direction:column;align-items:stretch;gap:2px}
  .site-nav a{
    min-height:48px;padding:12px 14px;font-size:15px;
    border:0;border-bottom:1px solid var(--line);border-left:3px solid transparent;
  }
  .site-nav a:hover{background:rgba(52,245,208,.08);box-shadow:none;border-color:transparent;border-bottom-color:var(--line);color:var(--cyan)}
  .site-nav a[aria-current="page"]{
    background:var(--ink-700);color:var(--cyan);
    border-color:transparent;border-left-color:var(--signal);
    box-shadow:none;font-weight:700;
  }
  .band-meta{display:none}
  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr))}
  .col-4,.col-5,.col-6,.col-7,.col-8{grid-column:span 6}
}
@media (max-width:820px){
  .col-4,.col-5,.col-6,.col-7,.col-8{grid-column:span 6}
}
@media (max-width:700px){
  .band-status-more{display:none}
  .band-inner{min-height:auto;padding-block:8px;gap:8px}
  .btn--sm{min-height:42px;padding:8px 12px}
  .brand-name{font-size:16px}
  .brand-descriptor{font-size:10px;letter-spacing:.1em}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-links a{min-height:48px}
  .footer-meta{flex-direction:column;align-items:flex-start;gap:6px}
  .footer-contact{box-shadow:6px 6px 0 rgba(255,107,42,.9)}
}
@media (max-width:480px){
  .brand{padding-left:10px;gap:10px}
  .brand-mark{width:38px;height:38px;font-size:13px}
  .btn--sm{font-size:11px;letter-spacing:.06em;padding:8px 10px}
  .footer-grid{grid-template-columns:1fr}
  .grid-12{grid-template-columns:1fr}
  .col-4,.col-5,.col-6,.col-7,.col-8,.col-12{grid-column:span 1}
}

/* ============ 11. 无障碍动效降级 ============ */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .lamp{animation:none;box-shadow:0 0 0 2px rgba(52,245,208,.22)}
  .card:hover,.card:focus-within,.btn--signal:hover,.btn--cyan:hover,.btn--paper:hover,.brand:hover .brand-mark{transform:none}
}