/* =========================================================
   12博数据 · 共享站点样式 /assets/site.css
   蓝图网格 · 侧轨导航 · 靛蓝底座 + 青绿/琥珀双强调
   ========================================================= */

/* ---------- 1. 变量 ---------- */
:root{
  --indigo-900:#0B1533;
  --indigo-800:#16224B;
  --indigo-700:#1E2F63;
  --teal-500:#0FB5A6;
  --teal-700:#0A7F76;
  --amber-500:#F0A03C;
  --amber-700:#B26A00;
  --metal-500:#8B94A8;
  --paper:#F5F7FB;
  --white:#FFFFFF;
  --ink:#101426;
  --line:#D3DAE8;
  --verify:#1F7A54;
  --text-dark-1:#E7ECF7;
  --text-dark-2:#B9C3D6;
  --rail-w:96px;
  --top-h:58px;
  --max-w:1320px;
  --prose-w:760px;
  --font-head:"Saira Condensed","Barlow Condensed","Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --hair:1px solid var(--line);
  --hair-dark:1px solid rgba(211,218,232,.18);
  --ease:cubic-bezier(.2,.7,.3,1);
}

/* ---------- 2. reset 与中文排版 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  padding-left:0;
  background-color:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-family:var(--font-head);font-weight:800;line-height:1.14;letter-spacing:-.01em;margin:0;color:var(--ink)}
h1{font-size:clamp(30px,5vw,64px)}
h2{font-size:clamp(24px,3.4vw,40px)}
h3{font-weight:600;font-size:clamp(18px,2vw,24px)}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video{max-width:100%;height:auto;display:block}
a{color:var(--teal-700);text-decoration:none}
a:hover{text-decoration:underline}
button{font:inherit;color:inherit;background:none;border:0}
:focus-visible{outline:2px solid var(--teal-500);outline-offset:2px}
[hidden]{display:none !important}
::selection{background:var(--teal-500);color:#04201D}
.mono,.num{font-family:var(--font-mono);letter-spacing:.02em;font-weight:500}

/* ---------- 3. 通用容器与网格 ---------- */
.container{width:100%;max-width:var(--max-w);margin:0 auto;padding:0 20px}
.container--narrow{max-width:var(--prose-w)}
.prose{max-width:var(--prose-w);font-size:16.5px;line-height:1.8}
.prose p+p{margin-top:14px}
.grid{display:grid;gap:24px;grid-template-columns:minmax(0,1fr)}
.grid--2,.grid--3,.grid--5-7,.grid--4-8{display:grid;gap:24px;grid-template-columns:minmax(0,1fr)}
@media (min-width:768px){
  .grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
  .grid--5-7{grid-template-columns:5fr 7fr}
  .grid--4-8{grid-template-columns:4fr 8fr}
}
@media (min-width:1024px){
  .container{padding:0 40px}
}

/* ---------- 4. 章节标题与分隔刻度 ---------- */
.section-head{display:flex;flex-direction:column;gap:6px;margin-bottom:22px}
.section-head__index{font-family:var(--font-mono);font-size:13px;letter-spacing:.08em;color:var(--teal-700)}
.section-head__kicker{font-size:11px;font-weight:600;letter-spacing:.14em;color:var(--metal-500)}
.section-head__title{font-family:var(--font-head);font-weight:800;font-size:clamp(26px,3.6vw,42px);line-height:1.1;letter-spacing:-.01em;color:var(--ink);margin:0}
.rule{position:relative;height:1px;background:var(--line);margin:36px 0;border:0}
.rule::after{content:"";position:absolute;left:0;top:-3px;width:1px;height:7px;background:var(--metal-500)}

/* ---------- 5. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 20px;border:1px solid transparent;border-radius:0;
  font-family:var(--font-body);font-size:14px;font-weight:600;letter-spacing:.06em;
  background-color:var(--indigo-900);color:#fff;text-decoration:none;cursor:pointer;
  transition:transform .18s var(--ease),background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn:hover{text-decoration:none;transform:translateY(-2px)}
.btn--primary{background-color:var(--teal-500);color:#04201D}
.btn--primary:hover{background-color:#12C9B8}
.btn--amber{background-color:var(--amber-500);color:#3A2200}
.btn--amber:hover{background-color:#FFB155}
.btn--ghost{background-color:transparent;border-color:var(--line);color:var(--ink)}
.btn--ghost:hover{border-color:var(--teal-500);color:var(--teal-700)}
.btn--on-dark{background-color:transparent;border-color:rgba(211,218,232,.4);color:var(--text-dark-1)}
.btn--on-dark:hover{border-color:var(--teal-500);color:var(--teal-500)}

/* ---------- 6. 面包屑 ---------- */
.breadcrumb{font-size:12px;letter-spacing:.06em;color:var(--metal-500);margin:0 0 20px}
.breadcrumb__list{display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0;list-style:none}
.breadcrumb__item{display:flex;align-items:center;gap:8px}
.breadcrumb__item+.breadcrumb__item::before{content:"/";color:var(--line)}
.breadcrumb__link{color:var(--teal-700);text-decoration:none}
.breadcrumb__link:hover{text-decoration:underline}

/* ---------- 7. 卡片与标签 ---------- */
.card{position:relative;background-color:var(--white);border:var(--hair);border-radius:0;padding:22px}
.card__title{font-family:var(--font-head);font-weight:600;font-size:19px;line-height:1.25;color:var(--ink);margin:0 0 8px}
.card--panel{background-color:var(--indigo-800);border-color:rgba(211,218,232,.16);color:var(--text-dark-1)}
.card--panel .card__title{color:#fff}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 8px;border:1px solid var(--line);border-radius:0;background-color:var(--paper);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--ink);
}
.tag--s1{border-color:var(--indigo-700);color:var(--indigo-700);background-color:#EDF0F9}
.tag--s2{border-color:var(--teal-700);color:var(--teal-700);background-color:#E6F6F4}
.tag--s3{border-color:var(--amber-700);color:var(--amber-700);background-color:#FCF2E2}
.tag--s4{border-color:var(--metal-500);color:#5A6478;background-color:#F0F2F7}
.tag--s5{border-color:var(--verify);color:var(--verify);background-color:#E8F4EE}
.tag--on-dark{background-color:rgba(255,255,255,.06);border-color:rgba(211,218,232,.3);color:var(--text-dark-1)}

/* ---------- 8. 图片容器（页面阶段放入产线/部件/网点/图表） ---------- */
.media{position:relative;display:block;margin:0;overflow:hidden;border:var(--hair);border-radius:0;background-color:var(--indigo-800);background-image:linear-gradient(135deg,var(--indigo-900) 0%,#1B2B5E 100%)}
.media__img{display:block;width:100%;height:auto;aspect-ratio:16/10;object-fit:cover}
.media--wide .media__img{aspect-ratio:21/9}
.media--tall .media__img{aspect-ratio:4/5}
.media--square .media__img{aspect-ratio:1/1}
.media__badge{position:absolute;top:0;left:0;z-index:2;padding:4px 10px;background-color:var(--indigo-900);color:var(--teal-500);font-family:var(--font-mono);font-size:12px;letter-spacing:.08em}
.media__caption{position:relative;z-index:2;padding:10px 14px;background-color:var(--white);border-top:var(--hair);font-size:12px;line-height:1.6;letter-spacing:.04em;color:var(--metal-500)}

/* ---------- 9. 显现动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .24s var(--ease),transform .24s var(--ease)}
.reveal.is-visible{opacity:1;transform:none}

/* ---------- 10. 跳过链接 ---------- */
.skip-link{
  position:fixed;left:8px;top:-64px;z-index:200;
  padding:10px 16px;background-color:var(--teal-500);color:#04201D;
  font-size:13px;font-weight:600;letter-spacing:.08em;text-decoration:none;
  transition:top .16s var(--ease);
}
.skip-link:focus{top:8px;text-decoration:none}

/* ---------- 11. 头部：移动端顶部条 + 抽屉 ---------- */
.site-rail{
  position:sticky;top:0;left:0;z-index:60;
  width:100%;height:var(--top-h);
  display:flex;flex-direction:row;align-items:center;justify-content:space-between;gap:12px;
  padding:0 16px;
  background-color:var(--indigo-900);
  color:var(--text-dark-1);
  border-bottom:var(--hair-dark);
}
.rail-brand{display:flex;flex-direction:row;align-items:center;gap:10px;color:inherit;text-decoration:none}
.rail-brand:hover{text-decoration:none}
.rail-brand__mark{
  width:28px;height:28px;display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;
  background-color:var(--teal-500);color:#04201D;
  font-family:var(--font-mono);font-size:12px;font-weight:700;letter-spacing:-.02em;
}
.rail-brand__name{font-family:var(--font-head);font-weight:800;font-size:15px;letter-spacing:.12em;color:#fff;white-space:nowrap}
.nav-toggle{
  display:inline-flex;align-items:center;gap:10px;
  padding:8px 12px;border:1px solid rgba(211,218,232,.35);border-radius:0;
  color:var(--text-dark-1);font-size:13px;letter-spacing:.1em;cursor:pointer;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--teal-500);color:#fff}
.nav-toggle__bars{display:inline-flex;flex-direction:column;gap:3px;width:16px;flex:0 0 auto}
.nav-toggle__bars span{display:block;height:1.5px;width:100%;background-color:var(--teal-500);transition:transform .18s var(--ease),opacity .18s var(--ease)}
.site-rail[data-open] .nav-toggle__bars span:nth-child(1){transform:translateY(4.5px) rotate(45deg)}
.site-rail[data-open] .nav-toggle__bars span:nth-child(2){opacity:0}
.site-rail[data-open] .nav-toggle__bars span:nth-child(3){transform:translateY(-4.5px) rotate(-45deg)}
.rail-nav{
  position:absolute;left:0;right:0;top:var(--top-h);display:none;flex-direction:column;
  max-height:calc(100vh - var(--top-h));overflow-y:auto;
  padding:4px 0 16px;
  background-color:var(--indigo-900);
  background-image:linear-gradient(rgba(139,148,168,.08) 1px,transparent 1px);
  background-size:100% 34px;
  border-bottom:var(--hair-dark);
  box-shadow:0 22px 42px -26px rgba(0,0,0,.85);
}
.site-rail[data-open] .rail-nav{display:flex}
.rail-nav__list{display:flex;flex-direction:column;margin:0;padding:0;list-style:none}
.rail-nav__item{margin:0}
.rail-nav__link{
  display:flex;flex-direction:row;align-items:center;justify-content:flex-start;gap:14px;
  padding:14px 18px;
  color:var(--text-dark-2);text-decoration:none;
  border-left:2px solid transparent;
  border-bottom:1px solid rgba(211,218,232,.12);
  transition:color .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease);
}
.rail-nav__link:hover{color:#fff;background-color:rgba(15,181,166,.12);text-decoration:none}
.rail-nav__index{font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--metal-500);flex:0 0 auto}
.rail-nav__label{writing-mode:horizontal-tb;font-size:15px;font-weight:500;letter-spacing:.06em;white-space:nowrap}
.rail-nav__link[aria-current="page"]{color:#fff;background-color:rgba(15,181,166,.16);border-left-color:var(--teal-500)}
.rail-nav__link[aria-current="page"] .rail-nav__index{color:var(--teal-500)}
.rail-nav__link[data-current="true"]{color:#fff;background-color:rgba(15,181,166,.1)}
.rail-nav__link[data-current="true"] .rail-nav__index{color:var(--amber-500)}
.rail-quick{display:block;margin-top:8px;padding:14px 18px 0;border-top:var(--hair-dark)}
.rail-quick__title{margin:0 0 10px;font-size:11px;font-weight:600;letter-spacing:.14em;color:var(--metal-500)}
.rail-quick__list{display:flex;flex-direction:column;gap:8px;margin:0;padding:0;list-style:none}
.rail-quick__link{
  display:block;padding:8px 10px;border:1px solid rgba(211,218,232,.22);
  color:#DCE4F2;font-size:14px;letter-spacing:.04em;text-decoration:none;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.rail-quick__link:hover{border-color:var(--teal-500);color:#fff;text-decoration:none}
.rail-cta{display:none}
.rail-progress{position:absolute;left:0;right:0;bottom:0;height:2px;background-color:rgba(211,218,232,.2)}
.rail-progress__bar{--p:0;display:block;height:100%;width:calc(var(--p) * 100%);background-color:var(--teal-500)}

/* ---------- 12. 头部：桌面侧轨 ---------- */
@media (min-width:1024px){
  body{padding-left:var(--rail-w)}
  .site-rail{
    position:fixed;top:0;left:0;bottom:0;width:var(--rail-w);height:auto;
    flex-direction:column;align-items:stretch;justify-content:flex-start;gap:0;
    padding:0;
    border-bottom:0;border-right:var(--hair-dark);
    background-image:linear-gradient(rgba(139,148,168,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(139,148,168,.07) 1px,transparent 1px);
    background-size:24px 24px;
  }
  .rail-brand{flex-direction:column;gap:10px;padding:16px 8px 14px;border-bottom:var(--hair-dark)}
  .rail-brand__mark{width:36px;height:36px;font-size:15px}
  .rail-brand__name{writing-mode:vertical-rl;font-size:15px;letter-spacing:.18em}
  .nav-toggle{display:none}
  .rail-nav{
    position:static;display:flex;flex:1 1 auto;min-height:0;max-height:none;
    justify-content:center;overflow-y:auto;padding:8px 0;
    background-color:transparent;background-image:none;border-bottom:0;box-shadow:none;
  }
  .site-rail[data-open] .rail-nav{display:flex}
  .rail-nav__list{width:100%}
  .rail-nav__link{
    flex-direction:column;justify-content:center;gap:5px;
    padding:10px 4px;border-left:2px solid transparent;border-bottom:0;
  }
  .rail-nav__label{writing-mode:vertical-rl;width:1.2em;overflow:hidden;font-size:13px;letter-spacing:.14em;transition:width .18s var(--ease),opacity .18s var(--ease)}
  .site-rail[data-compact] .rail-nav__label{width:0;opacity:0}
  .site-rail[data-compact] .rail-nav__link:hover .rail-nav__label,
  .site-rail[data-compact] .rail-nav__link:focus-visible .rail-nav__label{width:1.2em;opacity:1}
  .rail-quick{display:none}
  .rail-cta{
    display:flex;align-items:center;justify-content:center;
    margin:12px 10px 16px;padding:10px 6px;
    background-color:var(--amber-500);color:#3A2200;
    font-size:13px;font-weight:600;letter-spacing:.1em;text-align:center;text-decoration:none;
    transition:background-color .18s var(--ease);
  }
  .rail-cta:hover{background-color:#FFB155;text-decoration:none}
  .rail-progress{top:0;bottom:0;right:0;left:auto;width:2px;height:auto;background-color:rgba(211,218,232,.12)}
  .rail-progress__bar{width:100%;height:calc(var(--p) * 100%);background-image:linear-gradient(180deg,var(--teal-500),var(--amber-500));background-color:transparent}
  .skip-link{left:calc(var(--rail-w) + 8px)}
}

/* ---------- 13. 页脚 ---------- */
.site-footer{
  position:relative;margin-top:64px;
  background-color:var(--indigo-900);
  color:var(--text-dark-2);
  border-top:var(--hair-dark);
  padding:56px 0 28px;
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background-image:linear-gradient(90deg,var(--teal-500) 0 25%,var(--amber-500) 25% 38%,rgba(211,218,232,.22) 38% 100%);
}
.footer-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:32px}
@media (min-width:768px){
  .footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:28px}
}
.footer-brand{display:flex;flex-direction:column;gap:8px}
.footer-brand__mark{
  width:34px;height:34px;display:inline-flex;align-items:center;justify-content:center;
  background-color:var(--teal-500);color:#04201D;
  font-family:var(--font-mono);font-size:14px;font-weight:700;
}
.footer-brand__name{font-family:var(--font-head);font-weight:800;font-size:22px;letter-spacing:.06em;color:#fff}
.footer-brand__tag{font-size:13px;line-height:1.7;letter-spacing:.04em;color:var(--metal-500);max-width:24ch}
.footer-col__title{
  margin:0 0 12px;padding-bottom:8px;
  font-size:12px;font-weight:600;letter-spacing:.14em;color:var(--teal-500);
  border-bottom:1px solid rgba(211,218,232,.16);
}
.footer-list{display:flex;flex-direction:column;gap:9px;margin:0;padding:0;list-style:none}
.footer-link{color:#DCE4F2;font-size:14px;letter-spacing:.03em;text-decoration:none;transition:color .18s var(--ease)}
.footer-link:hover{color:var(--teal-500);text-decoration:none}
.footer-contact{margin-top:40px;padding-top:26px;border-top:1px solid rgba(211,218,232,.14)}
.footer-contact__title{margin:0 0 16px;font-size:11px;font-weight:600;letter-spacing:.14em;color:var(--metal-500)}
.footer-contact__list{display:grid;grid-template-columns:minmax(0,1fr);gap:14px 24px;margin:0;padding:0;list-style:none}
@media (min-width:768px){
  .footer-contact__list{grid-template-columns:repeat(3,minmax(0,1fr))}
}
.footer-contact__row{display:flex;flex-direction:column;gap:2px}
.footer-contact__key{font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--metal-500)}
.footer-contact__val{font-size:14px;line-height:1.6;color:var(--text-dark-1);word-break:break-all}
.footer-note{margin-top:14px;max-width:68ch;font-size:12px;line-height:1.7;letter-spacing:.02em;color:var(--metal-500)}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 24px;
  margin-top:28px;padding-top:18px;
  border-top:1px solid rgba(211,218,232,.14);
}
.footer-icp{font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;color:var(--metal-500)}
.footer-meta{font-size:12px;letter-spacing:.04em;color:var(--metal-500)}
.footer-bottom .footer-note{margin:0;flex:1 1 260px}

/* ---------- 14. 返回顶部 ---------- */
.to-top{
  position:fixed;right:20px;bottom:20px;z-index:50;
  width:46px;height:46px;display:inline-flex;align-items:center;justify-content:center;
  background-color:var(--indigo-900);color:#fff;border:1px solid rgba(211,218,232,.35);border-radius:0;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;cursor:pointer;
  opacity:0;visibility:hidden;
  transition:opacity .2s var(--ease),visibility .2s var(--ease),border-color .18s var(--ease);
}
.to-top[data-visible]{opacity:1;visibility:visible}
.to-top:hover{border-color:var(--teal-500);color:var(--teal-500)}

/* ---------- 15. 动效与无障碍降级 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .reveal{opacity:1;transform:none}
  .btn:hover{transform:none}
  .rail-progress__bar{transition:none}
}