/* ==========================================================================
   亚新官网 · 共享样式 /assets/site.css
   工业档案感 + 边疆地理气质 · 砂岩底 / 档案墨 / 品牌深红
   ========================================================================== */

:root{
  --sand-050:#F7F4EF;
  --snow:#FFFFFF;
  --glacier-100:#E8EEF0;
  --sand-300:#D5CCBE;
  --ink-500:#8A8378;
  --ink-900:#12100E;
  --red-600:#A3231F;
  --red-600-deep:#8B1C19;
  --red-100:#F2DEDC;
  --teal-700:#26504E;
  --amber-600:#8A5A12;
  --amber-100:#F1E4CC;

  --font-sans:"Noto Sans SC","HarmonyOS Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --shell-max:1320px;
  --gutter:24px;
  --radius-soft:24px;
  --radius-card:20px;
  --radius-pill:999px;
  --duration:180ms;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--sand-050);
  color:var(--ink-900);
  font-family:var(--font-sans);
  font-size:17px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
img,svg,video{display:block;max-width:100%}
table{border-collapse:collapse;width:100%}
address{font-style:normal}
:focus-visible{outline:2px solid var(--red-600);outline-offset:3px;border-radius:6px}

/* ---------- 中文排版 ---------- */
h1,h2,h3,h4{font-weight:800;letter-spacing:-.02em;line-height:1.14}
p{max-width:68ch}
.mono,code,kbd{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:0}

/* ---------- 无障碍工具 ---------- */
.visually-hidden{
  position:absolute!important;
  width:1px;height:1px;
  margin:-1px;padding:0;border:0;
  overflow:hidden;
  clip:rect(0 0 0 0);
  clip-path:inset(50%);
  white-space:nowrap;
}
.skip-link{
  position:absolute;
  left:16px;top:10px;
  z-index:200;
  padding:10px 18px;
  border-radius:var(--radius-pill);
  background:var(--ink-900);
  color:var(--snow);
  font-size:14px;
  font-weight:700;
  transform:translateY(-180%);
  transition:transform var(--duration) ease;
}
.skip-link:focus{transform:translateY(0)}

#main-content{display:block;outline:none;scroll-margin-top:120px}

/* ==========================================================================
   头部 · 悬浮胶囊
   ========================================================================== */
.site-header{
  position:sticky;
  top:0;
  z-index:90;
  padding:12px clamp(12px,2.2vw,28px);
  background:rgba(247,244,239,.96);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:1px;
  background:transparent;
  transition:background-color .25s ease;
}
.site-header[data-scrolled]::after{background:rgba(213,204,190,.8)}

.read-progress{
  position:fixed;
  top:0;left:0;right:0;
  height:3px;
  z-index:120;
  pointer-events:none;
  background:transparent;
}
.read-progress-bar{
  display:block;
  height:100%;
  width:100%;
  background:var(--red-600);
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform .1s linear;
}

.header-shell{
  position:relative;
  max-width:var(--shell-max);
  margin:0 auto;
  display:flex;
  align-items:center;
  gap:clamp(10px,1.6vw,22px);
  padding:8px 10px 8px 18px;
  background:var(--snow);
  border:1px solid var(--sand-300);
  border-radius:var(--radius-pill);
  box-shadow:0 10px 30px rgba(18,16,14,.07);
  transition:padding .25s ease,box-shadow .25s ease;
}
.site-header[data-scrolled] .header-shell{
  padding-top:6px;
  padding-bottom:6px;
  box-shadow:0 8px 22px rgba(18,16,14,.1);
}

/* 品牌浮岛 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  min-width:0;
}
.brand-mark{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:38px;height:38px;
  flex:0 0 auto;
  border-radius:12px;
  background:var(--red-600);
  color:var(--snow);
  font-family:var(--font-mono);
  font-size:13px;
  font-weight:600;
  letter-spacing:.02em;
}
.brand-copy{display:flex;flex-direction:column;line-height:1.16;min-width:0}
.brand-name{font-size:19px;font-weight:900;letter-spacing:.06em}
.brand-suffix{font-size:11px;color:var(--ink-500);letter-spacing:.03em;white-space:nowrap}

/* 当前栏目签 */
.header-current{
  flex:0 0 auto;
  max-width:0;
  padding:0;
  overflow:hidden;
  white-space:nowrap;
  opacity:0;
  border-radius:var(--radius-pill);
  background:var(--red-100);
  color:var(--red-600);
  font-family:var(--font-mono);
  font-size:12px;
  line-height:24px;
  letter-spacing:.04em;
  transition:max-width .3s ease,opacity .3s ease,padding .3s ease;
}
.site-header[data-scrolled] .header-current{
  max-width:190px;
  padding:0 12px;
  opacity:1;
}

/* 导航 */
.site-nav{flex:1 1 auto;display:flex;justify-content:center;min-width:0}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-link{
  display:inline-block;
  padding:9px 13px;
  border-radius:var(--radius-pill);
  font-size:15px;
  font-weight:500;
  white-space:nowrap;
  color:var(--ink-900);
  transition:background-color var(--duration) ease,color var(--duration) ease;
}
.nav-link:hover{background:var(--sand-050)}
.nav-link[aria-current="page"]{
  background:var(--red-100);
  color:var(--red-600);
  font-weight:700;
}

/* 行动区 */
.header-actions{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  margin-left:auto;
}
.header-phone{
  display:flex;
  flex-direction:column;
  line-height:1.18;
  padding-right:14px;
  border-right:1px solid var(--sand-300);
  text-align:right;
}
.header-phone-label{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.12em;
  color:var(--ink-500);
}
.header-phone-number{
  font-family:var(--font-mono);
  font-size:14px;
  font-weight:600;
  color:var(--ink-900);
}

/* 移动端按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  justify-content:center;
  width:42px;height:42px;
  flex:0 0 auto;
  border:1px solid var(--sand-300);
  border-radius:var(--radius-pill);
  background:var(--snow);
  transition:border-color var(--duration) ease;
}
.nav-toggle:hover{border-color:var(--ink-900)}
.nav-toggle-bars{
  position:relative;
  display:block;
  width:18px;height:2px;
  border-radius:2px;
  background:var(--ink-900);
  transition:background-color var(--duration) ease;
}
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;height:2px;
  border-radius:2px;
  background:var(--ink-900);
  transition:transform var(--duration) 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)}

/* ==========================================================================
   按钮
   ========================================================================== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  border:1px solid transparent;
  border-radius:var(--radius-pill);
  font-size:15px;
  font-weight:700;
  letter-spacing:.01em;
  text-align:center;
  transition:background-color var(--duration) ease,color var(--duration) ease,
             border-color var(--duration) ease,transform var(--duration) ease;
}
.btn-primary{background:var(--red-600);color:var(--snow)}
.btn-primary:hover{background:var(--red-600-deep)}
.btn-ghost{background:var(--snow);color:var(--ink-900);border-color:var(--sand-300)}
.btn-ghost:hover{border-color:var(--ink-900)}
.btn-sm{padding:9px 16px;font-size:14px}

/* ==========================================================================
   通用布局
   ========================================================================== */
.page-shell{
  max-width:var(--shell-max);
  margin:0 auto;
  padding:0 var(--gutter);
}
.section{padding:clamp(48px,7vw,96px) 0}
.section[data-section]{scroll-margin-top:120px}
.section-head{display:flex;flex-direction:column;gap:12px;max-width:820px}
.eyebrow{
  display:inline-flex;
  align-items:center;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--ink-500);
  transition:color var(--duration) ease;
}
.eyebrow::before{
  content:"";
  display:inline-block;
  width:18px;height:1px;
  margin-right:10px;
  background:var(--sand-300);
  transition:width var(--duration) ease,background-color var(--duration) ease;
}
.is-active .eyebrow{color:var(--red-600)}
.is-active .eyebrow::before{width:38px;background:var(--red-600)}
.section-title{font-size:clamp(28px,3.6vw,52px);font-weight:800}
.section-lede{font-size:clamp(16px,1.35vw,18px);line-height:1.7;max-width:62ch}

.grid{display:grid;gap:var(--gutter);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}

.rule{height:1px;border:0;margin:0;background:var(--sand-300)}

.breadcrumb{padding:20px 0 0;font-size:13px;color:var(--ink-500)}
.breadcrumb ol{display:flex;flex-wrap:wrap;gap:8px}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:var(--sand-300)}
.breadcrumb a{color:var(--ink-900)}
.breadcrumb a:hover{color:var(--red-600)}

/* ==========================================================================
   数据条
   ========================================================================== */
.stat-row{
  display:flex;
  flex-wrap:wrap;
  border-top:1px solid var(--sand-300);
  border-bottom:1px solid var(--sand-300);
}
.stat{flex:1 1 180px;padding:20px 22px;border-left:1px solid var(--sand-300)}
.stat:first-child{border-left:0}
.stat-value{
  font-family:var(--font-mono);
  font-size:clamp(28px,3.6vw,44px);
  font-weight:600;
  line-height:1.02;
  letter-spacing:-.01em;
  color:var(--ink-900);
}
.stat-unit{font-family:var(--font-mono);font-size:14px;color:var(--ink-500);margin-left:6px}
.stat-label{display:block;margin-top:10px;font-size:13px;line-height:1.5;color:var(--ink-500)}

/* ==========================================================================
   卡片
   ========================================================================== */
.card{
  padding:clamp(20px,2.4vw,28px);
  background:var(--snow);
  border:1px solid var(--sand-300);
  border-radius:var(--radius-soft);
}
.card-flat{
  background:var(--glacier-100);
  border:0;
  border-radius:var(--radius-soft);
}
.card-accent{
  background:var(--red-100);
  border-color:transparent;
  border-radius:var(--radius-soft);
}

/* ==========================================================================
   标签与筛选
   ========================================================================== */
.chip-filter{display:flex;flex-wrap:wrap;gap:8px}
.chip{
  padding:7px 14px;
  border:1px solid var(--sand-300);
  border-radius:var(--radius-pill);
  background:var(--snow);
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--ink-900);
  transition:background-color var(--duration) ease,color var(--duration) ease,border-color var(--duration) ease;
}
.chip:hover{border-color:var(--ink-900)}
.chip[aria-pressed="true"]{background:var(--ink-900);color:var(--snow);border-color:var(--ink-900)}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border-radius:var(--radius-pill);
  background:var(--glacier-100);
  color:var(--teal-700);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
}
.tag-brand{background:var(--red-100);color:var(--red-600)}
.tag-warn{background:var(--amber-100);color:var(--amber-600)}

/* ==========================================================================
   数据表
   ========================================================================== */
.data-table{
  background:var(--snow);
  border:1px solid var(--sand-300);
  font-variant-numeric:tabular-nums;
}
.data-table caption{
  padding:0 0 12px;
  text-align:left;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  color:var(--ink-500);
}
.data-table th{
  padding:12px 14px;
  background:var(--ink-900);
  color:var(--snow);
  font-size:13px;
  font-weight:700;
  letter-spacing:.05em;
  text-align:left;
  white-space:nowrap;
}
.data-table td{
  padding:12px 14px;
  border-top:1px solid var(--sand-300);
  font-size:15px;
  vertical-align:top;
}
.data-table tbody tr{transition:background-color 160ms ease}
.data-table tbody tr:hover{background:var(--glacier-100)}
.data-table .num{font-family:var(--font-mono)}

/* ==========================================================================
   折叠面板
   ========================================================================== */
.accordion{border-top:1px solid var(--sand-300)}
.accordion-item{border-bottom:1px solid var(--sand-300)}
.accordion-trigger{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:18px;
  width:100%;
  padding:18px 0;
  font-size:17px;
  font-weight:700;
  line-height:1.5;
  text-align:left;
  color:var(--ink-900);
  transition:color var(--duration) ease;
}
.accordion-trigger:hover{color:var(--red-600)}
.accordion-trigger::after{
  content:"＋";
  flex:0 0 auto;
  font-family:var(--font-mono);
  font-size:16px;
  color:var(--ink-500);
}
.accordion-trigger[aria-expanded="true"]::after{content:"－";color:var(--red-600)}
.accordion-panel{display:none;padding:0 0 22px;max-width:64ch}
.accordion-panel[data-open]{display:block}

/* ==========================================================================
   图片容器
   ========================================================================== */
.media{display:block}
.media-frame{
  position:relative;
  overflow:hidden;
  border:1px solid var(--sand-300);
  border-radius:var(--radius-soft);
  background-color:var(--glacier-100);
  background-image:repeating-linear-gradient(135deg,rgba(213,204,190,.55) 0 1px,transparent 1px 12px);
}
.media-frame 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-caption{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.65;
  color:var(--ink-500);
}

/* ==========================================================================
   显现动效
   ========================================================================== */
[data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .5s ease,transform .5s ease;
}
[data-reveal].is-visible{opacity:1;transform:none}

/* ==========================================================================
   页脚 · 墨色档案底盘
   ========================================================================== */
.site-footer{
  margin-top:clamp(64px,9vw,120px);
  background:var(--ink-900);
  color:var(--glacier-100);
}
.footer-shell{
  max-width:var(--shell-max);
  margin:0 auto;
  padding:clamp(44px,6vw,80px) var(--gutter) 28px;
}
.footer-top{
  display:grid;
  grid-template-columns:minmax(0,4fr) minmax(0,5fr) minmax(0,3fr);
  gap:clamp(24px,4vw,56px);
  padding-bottom:clamp(32px,4vw,48px);
  border-bottom:1px solid rgba(232,238,240,.16);
}
.footer-brand-name{
  font-size:34px;
  font-weight:900;
  letter-spacing:.04em;
  line-height:1;
  color:var(--snow);
}
.footer-tagline{
  margin-top:14px;
  font-size:16px;
  line-height:1.6;
  max-width:26ch;
  color:rgba(232,238,240,.84);
}
.footer-note{
  margin-top:18px;
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.7;
  max-width:34ch;
  color:rgba(232,238,240,.55);
}
.footer-cols{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.footer-col{min-width:0}
.footer-col-title{
  margin-bottom:14px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.14em;
  color:rgba(232,238,240,.5);
}
.footer-list{display:flex;flex-direction:column;gap:10px}
.footer-list a{
  font-size:15px;
  color:var(--glacier-100);
  border-bottom:1px solid transparent;
  transition:color var(--duration) ease,border-color var(--duration) ease;
}
.footer-list a:hover{color:var(--snow);border-bottom-color:rgba(242,222,220,.7)}

.footer-contact{min-width:0}
.contact-list{display:flex;flex-direction:column;gap:14px}
.contact-item{display:flex;flex-direction:column;gap:4px}
.contact-key{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:rgba(232,238,240,.48);
}
.contact-val{font-size:15px;line-height:1.55;color:var(--glacier-100)}
.contact-mono{font-family:var(--font-mono);word-break:break-word}
.contact-note{
  margin-top:16px;
  font-size:13px;
  line-height:1.7;
  max-width:34ch;
  color:rgba(232,238,240,.56);
}

/* 修订轴 */
.footer-revision{
  padding:clamp(28px,3.4vw,42px) 0;
  border-bottom:1px solid rgba(232,238,240,.16);
}
.revision-title{
  margin-bottom:20px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:rgba(232,238,240,.5);
}
.revision-axis{display:flex;flex-wrap:wrap;gap:0}
.revision-item{
  position:relative;
  flex:1 1 160px;
  min-width:140px;
  padding:20px 18px 0 0;
}
.revision-item::before{
  content:"";
  position:absolute;
  top:6px;left:0;
  width:calc(100% - 18px);
  height:1px;
  background:rgba(232,238,240,.2);
}
.revision-item::after{
  content:"";
  position:absolute;
  top:3px;left:0;
  width:7px;height:7px;
  border-radius:50%;
  background:rgba(232,238,240,.34);
}
.revision-item.is-current::after{
  background:var(--red-600);
  box-shadow:0 0 0 4px rgba(163,35,31,.24);
}
.revision-ver{
  display:block;
  font-family:var(--font-mono);
  font-size:14px;
  color:var(--glacier-100);
}
.revision-item.is-current .revision-ver{color:var(--red-100)}
.revision-cap{
  display:block;
  margin-top:4px;
  font-size:12px;
  line-height:1.5;
  color:rgba(232,238,240,.5);
}

.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px 28px;
  padding-top:22px;
}
.footer-legal{font-size:13px;line-height:1.7;color:rgba(232,238,240,.56)}
.footer-legal-links{display:flex;flex-wrap:wrap;gap:18px}
.footer-legal-links a{
  font-size:13px;
  color:rgba(232,238,240,.74);
  transition:color var(--duration) ease;
}
.footer-legal-links a:hover{color:var(--snow);text-decoration:underline}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width:1180px){
  .nav-link{padding:8px 10px;font-size:14px}
  .header-phone{display:none}
}

@media (max-width:1080px){
  .grid{grid-template-columns:repeat(8,minmax(0,1fr))}
  .col-7,.col-8{grid-column:span 8}
  .col-4,.col-5,.col-6{grid-column:span 4}

  .footer-top{grid-template-columns:minmax(0,1fr);gap:36px}
  .footer-cols{grid-template-columns:repeat(3,minmax(0,1fr))}
  .footer-tagline,.footer-note,.contact-note{max-width:56ch}
}

@media (max-width:1024px){
  .site-header{padding:10px 14px}
  .header-shell{padding:8px 10px 8px 14px}
  .header-current{display:none}
  .nav-toggle{display:inline-flex}

  .site-nav{
    position:absolute;
    top:calc(100% + 10px);
    left:0;right:0;
    display:none;
    flex:0 0 auto;
    justify-content:flex-start;
    padding:10px;
    background:var(--snow);
    border:1px solid var(--sand-300);
    border-radius:26px;
    box-shadow:0 22px 48px rgba(18,16,14,.16);
  }
  .site-nav[data-open]{display:block}
  .nav-list{flex-direction:column;align-items:stretch;gap:2px}
  .nav-link{display:block;padding:13px 16px;border-radius:16px;font-size:16px}
}

@media (max-width:680px){
  :root{--gutter:18px}
  body{font-size:16px}
  .grid{grid-template-columns:minmax(0,1fr)}
  .col-4,.col-5,.col-6,.col-7,.col-8,.col-12{grid-column:auto}
  .stat{flex:1 1 100%;border-left:0;border-top:1px solid var(--sand-300)}
  .stat:first-child{border-top:0}
  .footer-cols{grid-template-columns:minmax(0,1fr);gap:26px}
  .footer-base{flex-direction:column;align-items:flex-start}
}

@media (max-width:560px){
  .brand-suffix{display:none}
  .brand-mark{width:34px;height:34px;border-radius:10px}
  .brand-name{font-size:17px}
  .btn-sm{padding:8px 13px;font-size:13px}
  .footer-brand-name{font-size:28px}
}

/* ==========================================================================
   减少动效
   ========================================================================== */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
  [data-reveal]{opacity:1;transform:none}
  .read-progress-bar{transition:none}
}