/* =====================================================================
   三公平台 · 共享样式 /assets/site.css
   墨蓝调度轨道 + 暖砂纸面 + 朱砂橙刻度 —— 工单手册式版面
   ===================================================================== */

/* ---------- 01 重置 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,blockquote,dl,dd{margin:0;padding:0}
ul,ol{list-style:none}
img,svg,video,canvas{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;padding:0;cursor:pointer}
table{border-collapse:collapse}
hr{border:0;height:1px;background:var(--rule);margin:0}
::selection{background:var(--gold);color:var(--ink)}

/* ---------- 02 设计变量 ---------- */
:root{
  --ink:#0F2436;
  --ink-deep:#08161F;
  --paper:#F5EFE3;
  --paper-2:#EFE7D8;
  --paper-3:#FBF7EE;
  --rule:#DACEB7;
  --orange:#D8552B;
  --orange-deep:#B23F1C;
  --gold:#C89B4A;
  --jade:#4E8C74;
  --slate:#5A6B78;
  --clay:#A33B26;
  --index:#8C8578;
  --rail-w:88px;
  --topbar-h:58px;
  --measure:36rem;
  --bd:1px solid var(--rule);
  --bd-dark:1px solid rgba(245,239,227,.16);
  --font-sans:"Source Han Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","SF Mono",ui-monospace,Menlo,Consolas,"Liberation Mono",monospace;
}

/* ---------- 03 基础排版 ---------- */
body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:17px;
  font-weight:400;
  line-height:1.85;
  min-height:100vh;
  padding-top:var(--topbar-h);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-weight:700;line-height:1.2;letter-spacing:-.01em}
h1{font-size:clamp(2.1rem,5vw,3.4rem);font-weight:900;line-height:1.06;letter-spacing:-.02em}
h2{font-size:clamp(1.5rem,3vw,2.2rem)}
h3{font-size:clamp(1.15rem,1.8vw,1.4rem)}
h4{font-size:1.02rem}
strong,b{font-weight:700}
.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
  font-size:1.06em;
}
:focus-visible{outline:2px solid var(--orange);outline-offset:2px}
.site-header :focus-visible,.site-footer :focus-visible{outline-color:var(--gold)}
body.nav-locked{overflow:hidden}

.skip-link{
  position:fixed;left:0;top:0;z-index:200;
  background:var(--gold);color:var(--ink);
  padding:10px 18px;font-size:13px;font-weight:700;letter-spacing:.1em;
  transform:translateY(-150%);
  transition:transform .18s ease;
}
.skip-link:focus{transform:translateY(0)}

/* ---------- 04 布局骨架 ---------- */
.container{width:min(1200px,100% - 40px);margin-inline:auto}
.section{padding-block:clamp(44px,7vw,96px)}
.section--tight{padding-block:clamp(24px,4vw,48px)}
.section__head{
  display:flex;flex-wrap:wrap;align-items:baseline;gap:10px 22px;
  padding-bottom:14px;border-bottom:var(--bd);margin-bottom:clamp(20px,3vw,32px);
}
.section__title{font-size:clamp(1.4rem,2.8vw,2.1rem);line-height:1.2}
.grid{display:grid;gap:clamp(16px,2.4vw,30px)}
.grid--2{grid-template-columns:1fr}
.grid--3{grid-template-columns:1fr}
.grid--lead{grid-template-columns:1fr}
.stack{display:flex;flex-direction:column;gap:var(--stack,16px)}

@media (min-width:720px){
  .grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:1024px){
  .grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
  .grid--lead{grid-template-columns:minmax(0,2fr) minmax(0,1fr)}
}

/* ---------- 05 通用排版组件 ---------- */
.display{
  font-size:clamp(2.6rem,6vw,5.4rem);
  font-weight:900;line-height:1.02;letter-spacing:-.02em;
}
.eyebrow{
  display:inline-block;font-size:11px;letter-spacing:.22em;
  color:var(--slate);text-transform:uppercase;
}
.idx{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;
  color:var(--index);font-variant-numeric:tabular-nums;
}
.lede{font-size:clamp(1.02rem,1.5vw,1.22rem);line-height:1.78;color:#22384A}
.prose{max-width:var(--measure)}
.prose p + p{margin-top:1.35em}
.link-arrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:.1em;color:var(--ink);
  border-bottom:1px solid var(--gold);padding-bottom:3px;
}
.link-arrow::after{content:"→";font-family:var(--font-mono);color:var(--gold)}
.link-arrow:hover{color:var(--orange-deep);border-bottom-color:var(--orange-deep)}

/* ---------- 06 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 20px;
  border:1px solid var(--ink);background:transparent;color:var(--ink);
  font-size:14px;font-weight:600;letter-spacing:.08em;line-height:1.4;
  text-align:center;
  transition:transform .18s ease,background-color .18s ease,color .18s ease,border-color .18s ease;
}
.btn:hover{transform:translateY(-2px)}
.btn--cta{background:var(--orange-deep);border-color:var(--orange-deep);color:var(--paper)}
.btn--cta:hover{background:#9A3417;border-color:#9A3417}
.btn--ghost{border-color:var(--rule);color:var(--ink)}
.btn--ghost:hover{border-color:var(--ink);background:var(--paper-3)}
.rail__cta{
  width:100%;padding:9px 6px;font-size:12px;font-weight:700;
  letter-spacing:.06em;line-height:1.45;
}

/* ---------- 07 信息组件 ---------- */
.card{
  background:var(--paper);border:var(--bd);
  display:flex;flex-direction:column;
  transition:transform .18s ease,box-shadow .18s ease;
}
.card--dark{background:var(--ink);color:rgba(245,239,227,.86);border-color:rgba(245,239,227,.18)}
.card__head{
  display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;
  gap:8px 14px;padding:13px 16px;
  border-bottom:var(--bd);
}
.card--dark .card__head{border-bottom-color:rgba(245,239,227,.18)}
.card__title{font-size:1.04rem;font-weight:700;letter-spacing:.02em}
.card__body{padding:16px;display:flex;flex-direction:column;gap:12px;flex:1}
.card__note{
  padding:11px 16px;border-top:var(--bd);
  font-size:12.5px;line-height:1.7;color:var(--slate);
}
.card--dark .card__note{border-top-color:rgba(245,239,227,.18);color:var(--index)}
.card:hover{transform:translateY(-2px);box-shadow:0 0 0 1px var(--ink) inset}

.stat{display:flex;flex-direction:column;gap:6px}
.stat__num{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:clamp(1.6rem,3.4vw,2.5rem);font-weight:700;line-height:1;letter-spacing:.01em;
}
.stat__label{font-size:11px;letter-spacing:.18em;color:var(--slate);text-transform:uppercase}

.scale-bar{display:block;width:100%}
.scale-bar__track{
  position:relative;height:9px;
  background:var(--paper-2);border:var(--bd);
  background-image:linear-gradient(90deg,var(--rule) 1px,transparent 1px);
  background-size:10% 100%;
}
.scale-bar__fill{
  position:absolute;inset:0 auto 0 0;width:0;
  background:var(--orange);
}
.scale-bar__labels{
  display:flex;justify-content:space-between;gap:10px;
  margin-top:7px;font-family:var(--font-mono);font-size:11px;
  letter-spacing:.04em;color:var(--slate);font-variant-numeric:tabular-nums;
}

.table-scroll{overflow-x:auto;border:var(--bd);background:var(--paper)}
.data-table{width:100%;min-width:520px;font-size:15px;text-align:left}
.data-table caption{
  padding:12px 16px;text-align:left;font-size:11px;letter-spacing:.2em;
  color:var(--slate);text-transform:uppercase;border-bottom:var(--bd);
}
.data-table th,.data-table td{
  padding:12px 16px;border-bottom:1px solid var(--rule);vertical-align:top;
}
.data-table thead th{
  background:var(--ink);color:var(--paper);
  font-size:11.5px;letter-spacing:.16em;font-weight:700;white-space:nowrap;
}
.data-table tbody tr:last-child th,.data-table tbody tr:last-child td{border-bottom:0}
.data-table__num{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:16px;letter-spacing:.02em;white-space:nowrap;
}

.chip{
  display:inline-flex;align-items:center;gap:7px;
  padding:6px 12px;border:1px solid var(--rule);background:transparent;
  font-size:12px;letter-spacing:.1em;color:var(--slate);
  transition:background-color .16s ease,color .16s ease,border-color .16s ease;
}
.chip:hover{border-color:var(--ink);color:var(--ink)}
.chip--on,.chip[aria-pressed="true"]{
  background:var(--ink);color:var(--paper);
  border-color:var(--gold);box-shadow:inset 0 0 0 1px var(--gold);
}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 9px;border:1px solid currentColor;
  font-size:11px;letter-spacing:.14em;line-height:1.6;
}
.tag--gold{color:#7A5718;border-color:rgba(200,155,74,.7);background:rgba(200,155,74,.16)}
.tag--jade{color:#2C6650;border-color:rgba(78,140,116,.65);background:rgba(78,140,116,.14)}
.tag--clay{color:var(--clay);border-color:rgba(163,59,38,.55);background:rgba(163,59,38,.1)}
.tag--jade::before,.tag--gold::before,.tag--clay::before{
  content:"";width:6px;height:6px;background:currentColor;display:block;
}

.panel{
  border-left:3px solid var(--gold);background:var(--paper-3);
  padding:16px 18px;
}
.panel--alert{border-left-color:var(--clay);background:rgba(163,59,38,.07)}
.panel__title{
  font-size:11px;letter-spacing:.2em;color:var(--slate);
  text-transform:uppercase;margin-bottom:8px;
}

/* ---------- 08 分段控件与锚点索引 ---------- */
.seg{position:relative;border:var(--bd);background:var(--paper-3)}
.seg__list{display:flex;flex-wrap:wrap}
.seg__tab{
  position:relative;padding:12px 18px;
  border-right:var(--bd);border-bottom:0;
  font-size:13px;letter-spacing:.1em;color:var(--slate);
  transition:background-color .16s ease,color .16s ease;
}
.seg__tab:hover{color:var(--ink)}
.seg__tab[aria-selected="true"]{background:var(--paper-2);color:var(--ink);font-weight:700}
.seg__ink{
  position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--orange);
  transition:transform .22s ease,width .22s ease;
}
.seg__panel{padding:clamp(18px,2.6vw,28px);border-top:var(--bd)}
.seg__panel[hidden]{display:none}

.index-bar{
  position:sticky;top:var(--topbar-h);z-index:30;
  display:flex;overflow-x:auto;
  background:var(--paper);
  border-top:var(--bd);border-bottom:var(--bd);
  scrollbar-width:thin;
}
.index-bar__link{
  flex:0 0 auto;padding:12px 16px;
  border-right:var(--bd);
  font-size:12px;letter-spacing:.14em;color:var(--slate);white-space:nowrap;
}
.index-bar__link:hover{color:var(--ink);background:var(--paper-3)}
.index-bar__link[aria-current="true"]{
  color:var(--ink);font-weight:700;
  box-shadow:inset 0 -2px 0 var(--orange);
}

/* ---------- 09 图片容器 ---------- */
.media-frame{
  position:relative;display:block;width:100%;
  aspect-ratio:4 / 3;overflow:hidden;
  border:var(--bd);
  background-color:var(--paper-2);
  background-image:
    linear-gradient(var(--rule) 1px,transparent 1px),
    linear-gradient(90deg,var(--rule) 1px,transparent 1px);
  background-size:28px 28px;
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:16 / 9}
.media-frame--square{aspect-ratio:1 / 1}
.media-frame__note{
  display:block;margin-top:8px;
  font-size:12px;letter-spacing:.04em;line-height:1.7;color:var(--slate);
}

/* ---------- 10 显现 ---------- */
.js-reveal [data-reveal]{opacity:0;transform:translateY(6px)}
.js-reveal [data-reveal].is-in{
  opacity:1;transform:none;
  transition:opacity .42s ease,transform .42s ease;
}

/* ---------- 11 页头：品牌轨道 ---------- */
.site-header{
  position:fixed;inset:0 0 auto 0;z-index:80;
  background:var(--ink);
  border-bottom:1px solid rgba(245,239,227,.16);
}
.mobile-bar{
  position:relative;z-index:95;
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  height:var(--topbar-h);padding:0 16px;
}
.mobile-bar__brand{display:flex;align-items:center;gap:10px;color:var(--paper)}
.mobile-bar__mark{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;
  color:var(--gold);border:1px solid rgba(200,155,74,.6);padding:3px 6px;
}
.mobile-bar__text{
  display:flex;flex-direction:column;line-height:1.25;
  font-size:15px;font-weight:700;letter-spacing:.1em;
}
.mobile-bar__text em{font-style:normal;font-size:10px;font-weight:400;letter-spacing:.18em;color:var(--index)}
.nav-toggle{
  display:inline-flex;align-items:center;gap:9px;
  min-height:40px;padding:0 11px;
  border:1px solid rgba(245,239,227,.3);color:var(--paper);
  font-size:12px;letter-spacing:.18em;
}
.nav-toggle:hover{border-color:var(--gold);color:var(--gold)}
.nav-toggle__bars{display:grid;gap:4px;width:16px}
.nav-toggle__bars i{display:block;height:1.5px;background:currentColor;transition:transform .2s ease,opacity .2s ease}
.site-header[data-open="true"] .nav-toggle__bars i:nth-child(1){transform:translateY(5.5px) rotate(45deg)}
.site-header[data-open="true"] .nav-toggle__bars i:nth-child(2){opacity:0}
.site-header[data-open="true"] .nav-toggle__bars i:nth-child(3){transform:translateY(-5.5px) rotate(-45deg)}

.rail{
  position:fixed;top:0;right:0;bottom:0;z-index:100;
  width:min(86vw,340px);
  display:flex;flex-direction:column;gap:22px;
  padding:22px 20px 28px;
  background:var(--ink);
  border-left:1px solid rgba(245,239,227,.18);
  overflow-y:auto;
  transform:translateX(102%);
  visibility:hidden;
  transition:transform .28s cubic-bezier(.4,0,.2,1),visibility .28s;
}
.site-header[data-open="true"] .rail{transform:none;visibility:visible}

.nav-scrim{
  position:fixed;inset:0;z-index:90;
  background:rgba(8,22,31,.58);
  opacity:0;pointer-events:none;
  transition:opacity .24s ease;
}
.site-header[data-open="true"] .nav-scrim{opacity:1;pointer-events:auto}

.rail__brand{
  display:flex;align-items:center;gap:12px;flex-wrap:wrap;
  padding-bottom:16px;border-bottom:1px solid rgba(245,239,227,.16);
  color:var(--paper);
}
.rail__mark{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;
  color:var(--gold);border:1px solid rgba(200,155,74,.6);padding:3px 6px;
}
.rail__name{font-size:17px;font-weight:900;letter-spacing:.14em}
.rail__sub{font-size:10px;letter-spacing:.2em;color:var(--index)}

.primary-nav{width:100%}
.nav-list{display:flex;flex-direction:column;width:100%}
.nav-list__item{width:100%}
.nav-link{
  position:relative;
  display:flex;align-items:baseline;gap:12px;
  padding:13px 2px;
  border-bottom:1px solid rgba(245,239,227,.1);
  color:rgba(245,239,227,.76);
  font-size:15px;letter-spacing:.06em;line-height:1.4;
  transition:color .16s ease,background-color .16s ease;
}
.nav-link__idx{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;
  color:var(--index);font-variant-numeric:tabular-nums;
}
.nav-link__label{display:block}
.nav-link:hover{color:var(--paper);background:rgba(245,239,227,.07)}
.nav-link[aria-current="page"]{color:var(--paper);font-weight:700;background:rgba(216,85,43,.18)}
.nav-link[aria-current="page"]::before{
  content:"";position:absolute;left:-20px;top:-1px;bottom:-1px;width:4px;
  background:var(--orange);
}

.rail__foot{
  display:flex;flex-direction:column;align-items:center;gap:14px;
  margin-top:auto;padding-top:18px;
  border-top:1px solid rgba(245,239,227,.16);
}
.util-list{display:flex;flex-wrap:wrap;justify-content:center;gap:6px 16px}
.util-link{
  font-size:11px;letter-spacing:.18em;color:var(--index);
  border-bottom:1px solid transparent;
}
.util-link:hover{color:var(--paper);border-bottom-color:var(--gold)}

.rail-scale{width:100%;max-width:180px;padding:0 6px}
.rail-scale__track{display:block;height:3px;background:rgba(245,239,227,.22)}
.rail-scale__fill{display:block;height:100%;width:0;background:var(--orange);transition:width .12s linear}
.rail-scale__num{
  display:block;margin-top:7px;text-align:center;
  font-family:var(--font-mono);font-size:10px;letter-spacing:.18em;
  color:var(--gold);font-variant-numeric:tabular-nums;
}

/* ---------- 12 页脚 ---------- */
.site-footer{
  background:var(--ink-deep);
  color:rgba(245,239,227,.78);
  border-top:1px solid rgba(245,239,227,.14);
  margin-top:clamp(40px,6vw,80px);
}
.footer__inner{
  display:grid;gap:34px;
  max-width:1280px;margin-inline:auto;
  padding:clamp(38px,6vw,68px) 20px clamp(26px,4vw,42px);
}
.footer__brand{min-width:0}
.footer__logo{
  display:inline-block;
  font-size:1.55rem;font-weight:900;letter-spacing:.16em;color:var(--paper);
}
.footer__sub{font-size:11px;letter-spacing:.24em;color:var(--gold);margin-top:7px}
.footer__tag{margin-top:16px;font-size:14px;line-height:1.85;color:rgba(245,239,227,.72);max-width:30rem}
.footer__meta{margin-top:12px;font-size:12px;line-height:1.75;color:var(--index);max-width:30rem}
.footer__cols{display:grid;gap:26px 24px;grid-template-columns:repeat(2,minmax(0,1fr))}
.footer-col__title{
  font-size:11px;font-weight:700;letter-spacing:.22em;color:var(--gold);
  padding-bottom:10px;border-bottom:1px solid rgba(245,239,227,.16);
  margin-bottom:13px;
}
.footer-list{display:grid;gap:9px}
.footer-link{
  font-size:14px;color:rgba(245,239,227,.78);
  border-bottom:1px solid transparent;padding-bottom:2px;
  transition:color .16s ease,border-color .16s ease;
}
.footer-link:hover{color:var(--paper);border-bottom-color:var(--gold)}
.footer__contact{min-width:0}
.contact-list{display:grid;gap:12px}
.contact-item{display:grid;gap:3px}
.contact-item__key{font-size:10.5px;letter-spacing:.2em;color:var(--index)}
.contact-item__val{font-size:13.5px;line-height:1.65;color:var(--paper);word-break:break-word}
.footer__legal{
  display:flex;flex-wrap:wrap;gap:8px 28px;
  max-width:1280px;margin-inline:auto;
  padding:18px 20px 32px;
  border-top:1px solid rgba(245,239,227,.14);
  font-size:12px;letter-spacing:.05em;line-height:1.7;color:var(--index);
}
.footer__legal-line,.footer__copy{margin:0}
.footer__copy{font-family:var(--font-mono);letter-spacing:.08em}

@media (min-width:560px){
  .footer__cols{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media (min-width:780px){
  .footer__inner{grid-template-columns:minmax(0,1fr) minmax(0,1.7fr);column-gap:44px}
}
@media (min-width:1080px){
  .footer__inner{grid-template-columns:minmax(0,1.1fr) minmax(0,1.9fr) minmax(0,1.15fr);padding-inline:48px}
  .footer__legal{padding-inline:48px}
}

/* ---------- 13 桌面端：轨道常驻 ---------- */
@media (min-width:960px){
  body{padding-top:0;padding-left:var(--rail-w)}
  .site-header{
    inset:0 auto 0 0;width:var(--rail-w);
    border-bottom:0;border-right:1px solid rgba(245,239,227,.16);
  }
  .mobile-bar{display:none}
  .nav-scrim{display:none}
  .rail{
    position:static;visibility:visible;transform:none;
    width:100%;height:100%;
    padding:20px 0 16px;
    gap:0;
    border-left:0;
    overflow-y:auto;
    scrollbar-width:thin;
  }
  .rail__brand{
    flex-direction:column;align-items:center;gap:10px;
    padding:0 6px 18px;
  }
  .rail__name{
    writing-mode:vertical-rl;
    font-size:19px;letter-spacing:.26em;
  }
  .rail__sub{
    writing-mode:vertical-rl;
    font-size:9px;letter-spacing:.32em;color:var(--index);
  }
  .primary-nav{padding:6px 0}
  .nav-link{
    flex-direction:column;align-items:center;gap:3px;
    padding:11px 4px;text-align:center;font-size:12px;letter-spacing:.05em;
    border-bottom:0;border-top:1px solid rgba(245,239,227,.09);
  }
  .nav-link__idx{font-size:9px}
  .nav-link[aria-current="page"]::before{left:0;top:0;bottom:0;width:3px}
  .rail__foot{padding:16px 8px 0;margin-top:auto;gap:12px}
  .util-list{flex-direction:column;align-items:center;gap:6px}
  .rail-scale{max-width:64px;padding:0}
}
@media (min-width:960px) and (max-height:720px){
  .rail__sub{display:none}
  .nav-link{padding:8px 4px}
}