/* =========================================================
   宇博 · 共享样式 /assets/site.css
   工业档案底色 + 栏目轴轨道 + 信号橙锚点
   ========================================================= */

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--bar-h) + 20px)}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,dl,dt,dd,blockquote{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}
table{border-collapse:collapse;width:100%}

/* ---------- tokens ---------- */
:root{
  --ink:#070D18;
  --ink-2:#0F1D33;
  --steel:#263A55;
  --mist:#EEF3F9;
  --orange:#FF6B1A;
  --cyan:#4ADED0;
  --amber:#FFB020;
  --metal:#8E9BAB;
  --white:#FFFFFF;
  --teal:#1C7A72;

  --bar-h:66px;
  --rail-w:208px;
  --maxw:1240px;

  --r-lg:28px;
  --r-md:18px;
  --r-sm:12px;
  --pill:999px;

  --ease:cubic-bezier(.22,.61,.36,1);

  --line:rgba(38,58,85,.85);
  --line-soft:rgba(38,58,85,.55);

  --font-display:"Archivo","Helvetica Neue",Helvetica,Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-body:system-ui,-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular","JetBrains Mono",Menlo,Consolas,"Courier New",monospace;
}

/* ---------- base ---------- */
body{
  min-height:100vh;
  padding-top:var(--bar-h);
  background-color:var(--ink);
  color:var(--mist);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.8;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
@media (min-width:768px){
  body{
    background-image:
      radial-gradient(900px 560px at 84% -6%, rgba(74,222,208,.10), transparent 64%),
      radial-gradient(760px 520px at 2% 4%, rgba(255,107,26,.09), transparent 62%),
      linear-gradient(rgba(38,58,85,.20) 1px, transparent 1px),
      linear-gradient(90deg, rgba(38,58,85,.20) 1px, transparent 1px);
    background-size:auto,auto,84px 84px,84px 84px;
    background-position:0 0,0 0,-1px -1px,-1px -1px;
    background-repeat:no-repeat,no-repeat,repeat,repeat;
  }
}
@media (min-width:1024px){
  body{padding-left:var(--rail-w)}
}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:800;line-height:1.12;letter-spacing:-.01em;color:var(--mist)}
p{color:var(--mist)}
strong{font-weight:700;color:var(--white)}
::selection{background:var(--orange);color:#160800}

:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}

/* ---------- utilities ---------- */
.mono{font-family:var(--font-mono);letter-spacing:.04em}
.visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 22px}
@media (min-width:768px){.wrap{padding:0 34px}}
.stack{display:flex;flex-direction:column;gap:14px}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;top:10px;left:12px;z-index:400;
  display:inline-block;padding:11px 20px;border-radius:var(--pill);
  background:var(--orange);color:#180A02;font-weight:800;font-size:14px;
  transform:translateY(-180%);
  transition:transform .2s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

/* =========================================================
   头部
   ========================================================= */
.site-header{position:fixed;inset:0 0 auto 0;z-index:300}

.header-bar{
  position:relative;
  height:var(--bar-h);
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:0 18px;
  background:linear-gradient(100deg, rgba(7,13,24,.97), rgba(15,29,51,.94));
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}
@media (min-width:768px){.header-bar{padding:0 26px}}

/* 品牌 */
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand-mark{
  flex:0 0 auto;
  width:40px;height:40px;border-radius:13px;
  display:grid;place-items:center;
  background:linear-gradient(145deg,#FF8A45,var(--orange) 55%,#CE4E0A);
  color:#1A0A03;
  font-family:var(--font-mono);font-size:14px;font-weight:700;letter-spacing:.02em;
  box-shadow:0 8px 20px rgba(255,107,26,.28), inset 0 1px 0 rgba(255,255,255,.35);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;min-width:0}
.brand-name{font-family:var(--font-display);font-size:19px;font-weight:800;letter-spacing:.16em;color:var(--mist)}
.brand-sub{font-family:var(--font-mono);font-size:10px;letter-spacing:.2em;color:var(--cyan);white-space:nowrap}

/* 头部工具区 */
.header-tools{display:flex;align-items:center;gap:8px}
.header-query{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 16px;border-radius:var(--pill);
  border:1px solid rgba(74,222,208,.42);
  background:rgba(74,222,208,.10);
  color:#CFF8F3;font-family:var(--font-display);font-size:14px;font-weight:700;letter-spacing:.05em;
  white-space:nowrap;
  transition:background-color .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.header-query::before{
  content:"";width:7px;height:7px;border-radius:50%;
  background:var(--cyan);box-shadow:0 0 0 3px rgba(74,222,208,.16);
}
.header-query:hover{background:rgba(74,222,208,.2);border-color:var(--cyan);color:var(--white)}

.header-tel{
  font-family:var(--font-mono);font-size:13px;letter-spacing:.06em;
  color:var(--metal);padding:8px 6px;white-space:nowrap;
  transition:color .2s var(--ease);
}
.header-tel:hover{color:var(--mist)}

/* 抽屉开关 */
.nav-toggle{
  display:none;align-items:center;gap:10px;
  padding:9px 15px;border-radius:var(--pill);
  border:1px solid var(--steel);background:rgba(15,29,51,.85);
  color:var(--mist);cursor:pointer;
  transition:border-color .2s var(--ease),background-color .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);background:rgba(38,58,85,.5)}
.nav-toggle-label{font-family:var(--font-mono);font-size:12px;letter-spacing:.16em}
.nav-toggle-bars{display:inline-flex;flex-direction:column;justify-content:space-between;width:16px;height:12px}
.nav-toggle-bars i{display:block;height:2px;border-radius:2px;background:var(--orange);transition:transform .22s var(--ease),opacity .22s var(--ease)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

/* 滚动进度 */
.scroll-meter{
  position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:rgba(38,58,85,.6);overflow:hidden;pointer-events:none;
}
.scroll-meter-fill{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--orange),var(--amber));
  transition:width .12s linear;
}

/* =========================================================
   栏目轴 / 抽屉导航
   ========================================================= */
.site-nav{
  position:fixed;top:var(--bar-h);left:0;bottom:0;width:var(--rail-w);
  padding:22px 0 18px;
  background:linear-gradient(180deg,#0F1D33 0%,#0A1220 55%,#070D18 100%);
  border-right:1px solid var(--line);
  overflow-y:auto;overscroll-behavior:contain;
}
.nav-rail-title{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:0 18px 14px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.22em;color:var(--metal);
}
.nav-rail-count{
  display:inline-flex;align-items:center;justify-content:center;
  min-width:26px;padding:1px 6px;border-radius:6px;
  background:rgba(255,107,26,.14);border:1px solid rgba(255,107,26,.42);
  color:#FFC7A3;font-size:11px;letter-spacing:.06em;
}
.nav-rail{position:relative;display:flex;flex-direction:column;gap:2px}
.nav-rail::before{
  content:"";position:absolute;left:34px;top:6px;bottom:6px;width:1px;
  background:linear-gradient(180deg,transparent,rgba(38,58,85,.9) 18%,rgba(38,58,85,.9) 82%,transparent);
}
.nav-node{position:relative}
.nav-link{
  position:relative;
  display:grid;grid-template-columns:34px 1fr;align-items:center;gap:10px;
  padding:13px 18px;
  color:var(--metal);
  border-left:2px solid transparent;
  transition:color .22s var(--ease),background-color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
}
.nav-code{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;
  color:#5A6C85;transition:color .22s var(--ease);
}
.nav-label{
  font-family:var(--font-display);font-size:14.5px;font-weight:700;letter-spacing:.08em;
}
.nav-link:hover{color:var(--mist);background:rgba(38,58,85,.42);border-left-color:rgba(74,222,208,.6);transform:translateX(2px)}
.nav-link:hover .nav-code{color:var(--cyan)}
.nav-link[aria-current="page"]{
  color:var(--white);
  border-left-color:var(--orange);
  background:linear-gradient(90deg,rgba(255,107,26,.18),rgba(255,107,26,0) 88%);
  transform:none;
}
.nav-link[aria-current="page"] .nav-code{color:var(--orange)}
.nav-link[aria-current="page"]::after{
  content:"";position:absolute;left:-2px;top:50%;transform:translateY(-50%);
  width:2px;height:60%;background:var(--orange);border-radius:2px;
  box-shadow:0 0 12px rgba(255,107,26,.7);
}
.nav-rail-foot{
  display:flex;align-items:center;gap:9px;
  margin:26px 18px 0;padding-top:16px;
  border-top:1px solid var(--line-soft);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;color:var(--metal);
}
.nav-rail-dot{
  width:7px;height:7px;border-radius:50%;background:var(--cyan);
  box-shadow:0 0 0 3px rgba(74,222,208,.16);
  animation:yubo-pulse 2.6s var(--ease) infinite;
}
@keyframes yubo-pulse{0%,100%{opacity:1}50%{opacity:.35}}

@media (max-width:1023px){
  .nav-toggle{display:inline-flex}
  .site-nav{
    top:var(--bar-h);left:0;right:0;bottom:auto;width:auto;
    max-height:0;padding:0;
    opacity:0;visibility:hidden;pointer-events:none;
    transform:translateY(-10px);
    overflow:hidden;
    border-right:0;border-bottom:1px solid var(--line);
    transition:max-height .32s var(--ease),opacity .24s var(--ease),transform .28s var(--ease),padding .28s var(--ease),visibility .3s linear;
  }
  .site-nav[data-open]{
    max-height:calc(100vh - var(--bar-h));
    overflow-y:auto;
    padding:16px 0 22px;
    opacity:1;visibility:visible;pointer-events:auto;transform:translateY(0);
  }
  .nav-rail::before{display:none}
  .nav-link{padding:14px 20px;border-left-width:3px}
  .nav-rail-title{padding:0 20px 10px}
  .nav-rail-foot{margin:20px 20px 0}
}
@media (max-width:640px){
  .header-tel{display:none}
  .header-query{padding:8px 13px;font-size:13px}
  .brand-name{font-size:17px}
}

/* =========================================================
   通用组件
   ========================================================= */
.section{padding:clamp(52px,7vw,104px) 0}
.section--tight{padding:clamp(34px,4.4vw,64px) 0}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.24em;color:var(--cyan);
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--cyan);opacity:.75}
.section-title{font-size:clamp(28px,4.4vw,48px);margin-top:12px;color:var(--mist)}
.section-title--xl{font-size:clamp(38px,7vw,86px);letter-spacing:-.03em;line-height:1.02}
.panel-title{font-size:clamp(19px,2.4vw,24px);color:var(--mist)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:13px 24px;border-radius:var(--pill);
  font-family:var(--font-display);font-size:15px;font-weight:700;letter-spacing:.05em;
  border:1px solid transparent;cursor:pointer;
  transition:background-color .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn--primary{background:var(--orange);color:#180A02;box-shadow:0 12px 26px rgba(255,107,26,.24)}
.btn--primary:hover{background:#FF8340;transform:translateY(-2px);box-shadow:0 16px 30px rgba(255,107,26,.32)}
.btn--ghost{border-color:var(--steel);background:rgba(15,29,51,.72);color:var(--mist)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--white);transform:translateY(-2px)}
.btn--quiet{padding:9px 4px;color:var(--cyan);border-radius:8px}
.btn--quiet:hover{color:var(--white)}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--pill);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  border:1px solid var(--line);background:rgba(15,29,51,.72);color:var(--metal);
}
.tag--orange{color:#FFD5BC;border-color:rgba(255,107,26,.5);background:rgba(255,107,26,.14)}
.tag--cyan{color:#BFF6F0;border-color:rgba(74,222,208,.42);background:rgba(74,222,208,.12)}
.tag--amber{color:#FFE4B4;border-color:rgba(255,176,32,.44);background:rgba(255,176,32,.12)}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}

.panel{
  padding:clamp(20px,3vw,32px);
  border:1px solid rgba(38,58,85,.7);
  border-radius:var(--r-lg);
  background:linear-gradient(160deg,rgba(15,29,51,.94),rgba(7,13,24,.9));
}

.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
@media (max-width:980px){.grid--3{grid-template-columns:repeat(1,minmax(0,1fr))}}
@media (max-width:760px){.grid--2{grid-template-columns:minmax(0,1fr)}}

.stat{display:flex;flex-direction:column;gap:6px}
.stat-num{
  font-family:var(--font-mono);font-weight:700;
  font-size:clamp(40px,7vw,84px);line-height:1;letter-spacing:-.02em;color:var(--white);
  font-variant-numeric:tabular-nums;
}
.stat-label{font-family:var(--font-mono);font-size:12px;letter-spacing:.18em;color:var(--metal)}

/* ---------- 面包屑 ---------- */
.breadcrumb{padding:20px 0 0}
.breadcrumb-list{
  display:flex;flex-wrap:wrap;align-items:center;gap:6px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;color:var(--metal);
}
.breadcrumb-list li{display:inline-flex;align-items:center;gap:6px}
.breadcrumb-list li+li::before{content:"/";color:var(--steel)}
.breadcrumb-list a{color:var(--metal);transition:color .2s var(--ease)}
.breadcrumb-list a:hover{color:var(--cyan)}
.breadcrumb-list [aria-current="page"]{color:var(--mist)}

/* ---------- 图片容器 ---------- */
.media-frame{
  position:relative;display:block;overflow:hidden;
  border-radius:var(--r-lg);
  border:1px solid rgba(38,58,85,.8);
  background:linear-gradient(150deg,#0F1D33,#263A55 140%);
}
.media-frame img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/9}
.media-frame--wide img{aspect-ratio:21/9}
.media-frame--tall img{aspect-ratio:4/5}
.media-frame--square img{aspect-ratio:1/1}
.media-frame__label{
  position:absolute;left:14px;top:14px;z-index:2;
  padding:4px 11px;border-radius:var(--pill);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;
  color:var(--white);background:rgba(7,13,24,.74);border:1px solid rgba(74,222,208,.42);
}
.media-frame__credit{
  position:absolute;left:14px;right:14px;bottom:12px;z-index:2;
  font-size:12.5px;color:var(--mist);
}
.media-frame[data-media-empty]::after{
  content:"档案图占位";
  position:absolute;inset:0;display:grid;place-items:center;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.24em;color:var(--metal);
  background-image:repeating-linear-gradient(45deg,rgba(38,58,85,.4) 0 12px,transparent 12px 24px);
}

/* ---------- 折叠索引 ---------- */
.fold-trigger{
  display:flex;width:100%;align-items:center;justify-content:space-between;gap:14px;
  padding:15px 20px;border-radius:var(--r-md);
  border:1px solid var(--line);background:rgba(15,29,51,.7);
  font-family:var(--font-display);font-size:15.5px;font-weight:700;letter-spacing:.04em;
  color:var(--mist);cursor:pointer;text-align:left;
  transition:border-color .2s var(--ease),background-color .2s var(--ease);
}
.fold-trigger:hover{border-color:var(--cyan);background:rgba(38,58,85,.5)}
.fold-trigger::after{
  content:"+";flex:0 0 auto;
  font-family:var(--font-mono);font-size:18px;line-height:1;color:var(--cyan);
  transition:transform .22s var(--ease),color .22s var(--ease);
}
.fold-trigger[aria-expanded="true"]{border-color:rgba(255,107,26,.55)}
.fold-trigger[aria-expanded="true"]::after{content:"–";color:var(--orange);transform:rotate(180deg)}
.fold-panel{padding:16px 20px 4px;color:var(--mist)}
.fold-panel[hidden]{display:none}

/* ---------- 显现动画 ---------- */
.js [data-reveal]{opacity:0;transform:translateY(18px)}
.js [data-reveal].is-visible{
  opacity:1;transform:none;
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}

/* =========================================================
   页脚
   ========================================================= */
.site-footer{
  margin-top:clamp(48px,6vw,90px);
  background:linear-gradient(180deg,rgba(10,18,32,.9),var(--ink) 46%);
  border-top:1px solid var(--line);
  color:var(--metal);
  font-size:15px;
}
.footer-shell{
  width:100%;max-width:var(--maxw);margin:0 auto;
  padding:clamp(40px,5vw,64px) 22px 26px;
}
@media (min-width:768px){.footer-shell{padding-left:34px;padding-right:34px}}

.footer-top{
  display:grid;grid-template-columns:minmax(230px,1fr) 2fr;gap:clamp(26px,4vw,48px);
}
.footer-brand{min-width:0}
.footer-note{margin-top:16px;max-width:36ch;font-size:14.5px;line-height:1.75;color:var(--metal)}
.tag-row{margin-top:16px}

.footer-nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(18px,3vw,32px)}
.footer-col-title{
  display:flex;align-items:center;gap:10px;
  font-family:var(--font-display);font-size:13px;font-weight:800;letter-spacing:.2em;
  color:var(--mist);margin-bottom:14px;
}
.footer-col-code{
  display:inline-flex;align-items:center;justify-content:center;
  min-width:28px;padding:1px 7px;border-radius:6px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;
  color:#FFC7A3;background:rgba(255,107,26,.14);border:1px solid rgba(255,107,26,.42);
}
.footer-list{display:flex;flex-direction:column;gap:9px}
.footer-list a{
  display:inline-block;color:var(--metal);font-size:15px;
  transition:color .2s var(--ease),transform .2s var(--ease);
}
.footer-list a:hover{color:var(--cyan);transform:translateX(3px)}

.footer-mid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:18px 28px;
  margin-top:clamp(30px,4vw,46px);padding-top:26px;
  border-top:1px solid var(--line-soft);
}
.footer-contact{display:contents}
.footer-contact li{display:flex;flex-direction:column;gap:5px;min-width:0}
.footer-contact-key{font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;color:var(--metal)}
.footer-contact-val{color:var(--mist);font-size:15px;word-break:break-word}
.footer-hint{grid-column:1/-1;font-size:13.5px;color:var(--metal);line-height:1.7;max-width:70ch}

.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px 26px;
  margin-top:28px;padding-top:20px;
  border-top:1px solid var(--line-soft);
  font-size:13px;color:var(--metal);
}
.footer-copy,.footer-icp{font-family:var(--font-mono);font-size:12px;letter-spacing:.08em}
.footer-legal{display:flex;flex-wrap:wrap;gap:18px}
.footer-legal a{color:var(--metal);transition:color .2s var(--ease)}
.footer-legal a:hover{color:var(--cyan)}

@media (max-width:900px){
  .footer-top{grid-template-columns:minmax(0,1fr)}
  .footer-nav{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:560px){
  .footer-nav{grid-template-columns:minmax(0,1fr)}
  .footer-bottom{justify-content:flex-start}
}

/* ---------- 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;
  }
  .js [data-reveal]{opacity:1!important;transform:none!important}
  .nav-link:hover{transform:none}
  .btn:hover{transform:none}
  .footer-list a:hover{transform:none}
}