/* ============================================================
   经典品牌 · 授权区域调度中心 — 共享站点样式 /assets/site.css
   墨蓝底 + 琥珀金 + 信号橙；四城低饱和区域色作身份编码
   ============================================================ */

/* 01 · 变量 ------------------------------------------------ */
:root{
  --ink:#0B1B33;
  --ink-2:#132845;
  --ink-3:#0F2138;
  --ink-4:#1B3557;
  --amber:#D99A2B;
  --signal:#FF6B35;
  --bj:#2E8B8B;
  --sz:#C9A227;
  --sh:#E07A3F;
  --hz:#7A5AA6;
  --paper:#F5F1E8;
  --gray:#B9C4D4;
  --warn:#D64545;
  --ok:#3FA66A;

  --line:rgba(185,196,212,.16);
  --line-2:rgba(185,196,212,.30);

  --font-head:"Source Han Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono","Roboto Mono",Menlo,Consolas,"Courier New",monospace;

  --shell:1280px;
  --rail-h:34px;
  --bar-h:66px;
  --radius:2px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* 02 · Reset 与中文排版 ------------------------------------ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background-color:var(--ink);
  background-image:
    radial-gradient(1100px 520px at 88% -12%, rgba(217,154,43,.12), transparent 62%),
    radial-gradient(760px 420px at 4% 8%, rgba(46,139,139,.10), transparent 60%),
    linear-gradient(180deg,#0B1B33 0%,#0A1729 58%,#0B1B33 100%);
  background-attachment:fixed;
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    repeating-linear-gradient(0deg, rgba(185,196,212,.045) 0 1px, transparent 1px 88px),
    repeating-linear-gradient(90deg, rgba(185,196,212,.045) 0 1px, transparent 1px 88px);
  opacity:.7;
}
h1,h2,h3,h4,h5{font-family:var(--font-head);font-weight:800;line-height:1.25;letter-spacing:.01em;margin:0}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none}
img,svg,video{max-width:100%}
img{border:0}
button{font:inherit;color:inherit}
[hidden]{display:none !important}
:focus-visible{outline:2px solid var(--amber);outline-offset:2px;border-radius:var(--radius)}
::selection{background:var(--amber);color:var(--ink)}

/* 03 · 容器与栅格 ------------------------------------------ */
.shell{width:min(100% - 32px, var(--shell));margin-inline:auto}
@media (min-width:768px){.shell{width:min(100% - 56px, var(--shell))}}
main{position:relative;z-index:1}
.grid{display:grid;gap:18px}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(256px,1fr))}
.grid--4{grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}
.section{padding:56px 0}
.section--tight{padding:34px 0}
.band{position:relative;background:linear-gradient(180deg,rgba(19,40,69,.72),rgba(11,27,51,.9));border-block:1px solid var(--line)}
.band--panel{background:linear-gradient(180deg,#132845,#102139)}
.band--amber{background:linear-gradient(120deg,rgba(217,154,43,.16),rgba(255,107,53,.10) 60%,transparent);border-block:1px solid rgba(217,154,43,.42)}
.band--paper{background:var(--paper);color:var(--ink);border-block:1px solid var(--ink)}
.band--paper .eyebrow{color:#8A5F13}
.band--paper .muted,.band--paper .section-sub{color:#4A5A70}
.band--paper .panel{background:#FFFDF7;border-color:rgba(11,27,51,.22);box-shadow:5px 5px 0 -1px #E4DCCB, 5px 5px 0 0 rgba(11,27,51,.16)}
.band--paper .panel__title{color:var(--ink)}
.hairline{height:1px;background:var(--line);border:0;margin:0}

/* 04 · 通用按钮 -------------------------------------------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:9px 16px;
  font-family:var(--font-head);font-size:14px;font-weight:700;letter-spacing:.05em;
  border:1px solid var(--line-2);border-radius:var(--radius);
  background:transparent;color:var(--paper);
  cursor:pointer;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn--primary{background:var(--signal);border-color:var(--signal);color:#160B04;box-shadow:0 0 0 0 rgba(255,107,53,0)}
.btn--primary:hover{background:#FF8256;border-color:#FF8256;transform:translateY(-1px);box-shadow:0 8px 18px -10px rgba(255,107,53,.9)}
.btn--ghost{border-color:rgba(217,154,43,.55);color:var(--paper);background:rgba(217,154,43,.07)}
.btn--ghost:hover{background:rgba(217,154,43,.18);border-color:var(--amber);transform:translateY(-1px)}
.btn--quiet{border-color:var(--line-2);color:var(--gray)}
.btn--quiet:hover{color:var(--paper);border-color:var(--gray)}

/* 05 · 跳至主要内容 ---------------------------------------- */
.skip-link{
  position:absolute;left:12px;top:-64px;z-index:120;
  padding:10px 16px;
  background:var(--amber);color:var(--ink);
  font-weight:700;font-size:14px;border-radius:var(--radius);
  transition:top .18s var(--ease);
}
.skip-link:focus{top:12px}

/* 06 · 页头 ------------------------------------------------ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(11,27,51,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line-2);
}
.scroll-progress{
  position:absolute;left:0;bottom:-1px;height:2px;width:100%;
  transform:scaleX(var(--p,0));transform-origin:left center;
  background:linear-gradient(90deg,var(--amber),var(--signal));
  transition:transform .12s linear;
}
.header-rail{
  background:linear-gradient(90deg,rgba(217,154,43,.16),rgba(19,40,69,.30) 46%,rgba(11,27,51,0));
  border-bottom:1px solid var(--line);
}
.rail-inner{display:flex;align-items:center;gap:16px;min-height:var(--rail-h)}
.rail-brand{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.10em;color:var(--gray);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.status-dot{
  flex:none;width:7px;height:7px;border-radius:50%;
  background:var(--ok);box-shadow:0 0 0 3px rgba(63,166,106,.20);
}
.rail-status{
  margin-left:auto;font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;
  color:var(--gray);white-space:nowrap;
}
.rail-regions{display:flex;align-items:center;gap:6px}
.region-chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:2px 8px;
  font-size:11px;letter-spacing:.10em;
  color:var(--gray);
  border:1px solid currentColor;border-radius:var(--radius);
  background:rgba(185,196,212,.05);
  white-space:nowrap;
}
.region-chip::before{content:"";width:5px;height:5px;background:currentColor}
.region-chip--bj{color:var(--bj);background:rgba(46,139,139,.12)}
.region-chip--sz{color:var(--sz);background:rgba(201,162,39,.12)}
.region-chip--sh{color:var(--sh);background:rgba(224,122,63,.12)}
.region-chip--hz{color:var(--hz);background:rgba(122,90,166,.16)}

.header-bar{border-bottom:0}
.bar-inner{display:flex;align-items:center;gap:20px;min-height:var(--bar-h)}
.brand-mark{display:inline-flex;align-items:center;gap:10px;flex:none}
.brand-mark__index{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.10em;
  color:var(--amber);border:1px solid rgba(217,154,43,.55);
  padding:3px 6px;border-radius:var(--radius);background:rgba(217,154,43,.08);
}
.brand-mark__text{display:flex;flex-direction:column;gap:1px}
.brand-mark__name{font-family:var(--font-head);font-size:17px;font-weight:800;letter-spacing:.06em;line-height:1.1}
.brand-mark__line{font-size:10px;letter-spacing:.16em;color:var(--gray);line-height:1.2}
.brand-mark:hover .brand-mark__name{color:var(--amber)}
.brand-mark:hover .brand-mark__index{background:var(--amber);color:var(--ink)}

.site-nav{display:flex;align-items:center;gap:18px;margin-left:auto}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-link{
  display:inline-flex;align-items:baseline;gap:6px;
  padding:9px 11px;font-size:14px;letter-spacing:.03em;color:var(--gray);
  border:1px solid transparent;border-radius:var(--radius);
  transition:color .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.nav-link__idx{font-family:var(--font-mono);font-size:10px;letter-spacing:.06em;color:var(--amber);opacity:.8}
.nav-link:hover{color:var(--paper);background:rgba(217,154,43,.10);border-color:rgba(217,154,43,.38);transform:translateY(-1px)}
.nav-link[aria-current="page"]{
  color:var(--paper);background:rgba(217,154,43,.16);
  border-color:rgba(217,154,43,.55);
  box-shadow:inset 0 -2px 0 var(--amber);
}
.nav-link[aria-current="page"] .nav-link__idx{opacity:1;color:var(--amber)}
.nav-actions{display:flex;align-items:center;gap:8px}

.nav-toggle{
  display:none;align-items:center;gap:10px;
  height:40px;padding:0 12px;
  background:rgba(19,40,69,.7);border:1px solid var(--line-2);border-radius:var(--radius);
  cursor:pointer;
}
.nav-toggle__label{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--gray)}
.nav-toggle__bars{display:inline-flex;flex-direction:column;gap:4px;width:18px}
.nav-toggle__bars i{display:block;height:2px;width:100%;background:var(--paper);transition:transform .2s var(--ease),opacity .2s var(--ease)}
.nav-toggle[aria-expanded="true"]{border-color:rgba(217,154,43,.6);background:rgba(217,154,43,.14)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1){transform:translateY(6px) 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(-6px) rotate(-45deg)}
.nav-toggle:hover{border-color:var(--amber)}

/* 07 · 页脚 ------------------------------------------------ */
.site-footer{
  position:relative;z-index:1;
  margin-top:0;
  background:linear-gradient(180deg,#0A1729,#0B1B33 70%);
  border-top:1px solid var(--line-2);
}
.site-footer::before{
  content:"";display:block;height:4px;
  background:linear-gradient(90deg,var(--bj),var(--sz),var(--sh),var(--hz));
}
.footer-top{
  display:grid;gap:38px;
  grid-template-columns:1fr;
  padding:52px 0 38px;
}
.footer-brand__index{font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;color:var(--amber)}
.footer-brand__name{font-family:var(--font-head);font-size:26px;font-weight:800;letter-spacing:.08em;margin-top:8px}
.footer-brand__desc{color:var(--gray);font-size:14px;margin-top:10px;max-width:38ch}
.footer-regions{display:flex;flex-wrap:wrap;gap:6px;margin-top:16px}
.footer-cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:26px}
.footer-col__title{
  font-family:var(--font-head);font-size:12px;font-weight:800;letter-spacing:.16em;
  color:var(--paper);padding-bottom:9px;margin-bottom:12px;
  border-bottom:1px solid var(--line);
  display:flex;align-items:center;gap:8px;
}
.footer-col__title::before{content:"";width:8px;height:8px;background:var(--amber);flex:none}
.footer-col__list{display:flex;flex-direction:column;gap:8px}
.footer-col__list a{
  font-size:14px;color:var(--gray);
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-col__list a:hover{color:var(--paper);border-bottom-color:var(--amber)}
.footer-contact__list{display:flex;flex-direction:column;gap:12px}
.footer-contact__row{display:flex;flex-direction:column;gap:2px}
.footer-contact__term{font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;color:var(--amber)}
.footer-contact__desc{font-size:14px;color:var(--paper);word-break:break-word}
.footer-note{margin-top:14px;font-size:12px;line-height:1.6;color:var(--gray);max-width:42ch}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px 20px;
  padding:16px 0 30px;
  border-top:1px solid var(--line);
  font-size:12px;color:var(--gray);
}
.footer-legal{letter-spacing:.04em}
.footer-links{display:flex;flex-wrap:wrap;align-items:center;gap:12px}
.footer-links a{color:var(--gray);border-bottom:1px solid transparent;transition:color .18s var(--ease),border-color .18s var(--ease)}
.footer-links a:hover{color:var(--paper);border-bottom-color:var(--amber)}
.scroll-top{
  margin-left:auto;
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 12px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.10em;
  color:var(--gray);background:transparent;
  border:1px solid var(--line-2);border-radius:var(--radius);
  cursor:pointer;opacity:0;visibility:hidden;
  transition:opacity .2s var(--ease),visibility .2s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.scroll-top[data-visible]{opacity:1;visibility:visible}
.scroll-top:hover{color:var(--paper);border-color:var(--amber)}

/* 08 · 面包屑 ---------------------------------------------- */
.breadcrumbs{padding:20px 0 0;font-size:13px;color:var(--gray)}
.breadcrumb-list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb-item{display:flex;align-items:center;gap:8px}
.breadcrumb-item + .breadcrumb-item::before{content:"／";color:rgba(185,196,212,.45)}
.breadcrumb-link{color:var(--gray);border-bottom:1px solid transparent;transition:color .18s var(--ease),border-color .18s var(--ease)}
.breadcrumb-link:hover{color:var(--paper);border-bottom-color:var(--amber)}
.breadcrumb-current{color:var(--paper);font-weight:700}

/* 09 · 标题与索引节奏 -------------------------------------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.20em;
  color:var(--amber);text-transform:uppercase;
}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--amber)}
.section-head{display:flex;flex-direction:column;gap:10px;max-width:64ch}
.section-title{font-size:clamp(24px,3.2vw,34px);letter-spacing:.01em}
.section-sub,.muted{color:var(--gray);font-size:15px}
.index-num{font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;color:var(--amber)}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 9px;font-size:12px;letter-spacing:.08em;
  color:var(--gray);border:1px solid var(--line-2);border-radius:var(--radius);
  background:rgba(19,40,69,.6);
}
.tag--amber{color:var(--amber);border-color:rgba(217,154,43,.5);background:rgba(217,154,43,.10)}
.tag--signal{color:var(--signal);border-color:rgba(255,107,53,.5);background:rgba(255,107,53,.10)}
.tag--ok{color:var(--ok);border-color:rgba(63,166,106,.5);background:rgba(63,166,106,.10)}
.tag--warn{color:var(--warn);border-color:rgba(214,69,69,.5);background:rgba(214,69,69,.10)}
.tag--bj{color:var(--bj);border-color:rgba(46,139,139,.55);background:rgba(46,139,139,.12)}
.tag--sz{color:var(--sz);border-color:rgba(201,162,39,.55);background:rgba(201,162,39,.12)}
.tag--sh{color:var(--sh);border-color:rgba(224,122,63,.55);background:rgba(224,122,63,.12)}
.tag--hz{color:var(--hz);border-color:rgba(122,90,166,.6);background:rgba(122,90,166,.16)}

/* 10 · 档案卡与纸层 ---------------------------------------- */
.panel{
  position:relative;
  padding:22px;
  background:linear-gradient(180deg,#132845,#102139);
  border:1px solid var(--line-2);
  border-radius:var(--radius);
  box-shadow:5px 5px 0 -1px var(--ink-3),5px 5px 0 0 rgba(185,196,212,.20);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.panel:hover{transform:translate(-2px,-2px);border-color:rgba(217,154,43,.5);box-shadow:7px 7px 0 -1px var(--ink-3),7px 7px 0 0 rgba(217,154,43,.42)}
.panel--bj{border-top:3px solid var(--bj)}
.panel--sz{border-top:3px solid var(--sz)}
.panel--sh{border-top:3px solid var(--sh)}
.panel--hz{border-top:3px solid var(--hz)}
.panel--bj:hover{border-color:var(--bj);box-shadow:7px 7px 0 -1px var(--ink-3),7px 7px 0 0 rgba(46,139,139,.45)}
.panel--sz:hover{border-color:var(--sz);box-shadow:7px 7px 0 -1px var(--ink-3),7px 7px 0 0 rgba(201,162,39,.45)}
.panel--sh:hover{border-color:var(--sh);box-shadow:7px 7px 0 -1px var(--ink-3),7px 7px 0 0 rgba(224,122,63,.45)}
.panel--hz:hover{border-color:var(--hz);box-shadow:7px 7px 0 -1px var(--ink-3),7px 7px 0 0 rgba(122,90,166,.5)}
.panel__head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}
.panel__title{font-size:19px;font-weight:800;letter-spacing:.02em}
.panel__meta{font-family:var(--font-mono);font-size:11px;letter-spacing:.10em;color:var(--gray)}
.panel__body{font-size:14px;color:var(--gray)}
.panel__list{display:flex;flex-direction:column;gap:8px;margin-top:14px;font-size:14px;color:var(--paper)}
.panel__list li{display:flex;gap:8px;align-items:flex-start;line-height:1.6}
.panel__list li::before{content:"";flex:none;width:6px;height:6px;margin-top:9px;background:var(--amber)}

/* 11 · 数字锚点 -------------------------------------------- */
.stat{display:flex;flex-direction:column;gap:6px}
.stat__num{
  font-family:var(--font-mono);font-weight:700;line-height:.95;letter-spacing:-.02em;
  font-size:clamp(44px,8vw,112px);
  color:var(--paper);
}
.stat__num .stat__unit{font-size:.24em;letter-spacing:.10em;color:var(--amber);margin-left:.4em}
.stat__label{font-size:12px;letter-spacing:.16em;color:var(--gray);text-transform:uppercase}
.stat--signal .stat__num{color:var(--signal)}
.stat--amber .stat__num{color:var(--amber)}
.stat--ok .stat__num{color:var(--ok)}

/* 12 · 表格 ------------------------------------------------ */
.table-scroll{width:100%;overflow-x:auto;border:1px solid var(--line-2);border-radius:var(--radius);background:rgba(19,40,69,.55)}
.data-table{width:100%;border-collapse:collapse;font-size:14px}
.data-table caption{caption-side:top;text-align:left;padding:12px 14px;font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;color:var(--amber);border-bottom:1px solid var(--line)}
.data-table th{
  font-family:var(--font-mono);font-size:11px;font-weight:500;letter-spacing:.14em;text-transform:uppercase;
  color:var(--gray);text-align:left;padding:11px 14px;border-bottom:1px solid var(--line-2);white-space:nowrap;
}
.data-table td{padding:12px 14px;border-bottom:1px solid var(--line);vertical-align:top;color:var(--paper)}
.data-table tbody tr:last-child td{border-bottom:0}
.data-table tbody tr:hover td{background:rgba(217,154,43,.07)}
.data-table .is-num{font-family:var(--font-mono);letter-spacing:.02em}
.data-table .is-region{font-family:var(--font-mono);font-size:12px;letter-spacing:.10em}

/* 13 · 响应式图片容器（页面阶段放置图片） ------------------ */
.media-frame{
  position:relative;display:block;width:100%;overflow:hidden;
  background:
    repeating-linear-gradient(45deg,rgba(185,196,212,.06) 0 10px,transparent 10px 20px),
    linear-gradient(135deg,#162E4E,#0B1B33);
  border:1px solid var(--line-2);border-radius:var(--radius);
}
.media-frame img{display:block;width:100%;height:100%;object-fit:cover}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(11,27,51,0) 45%,rgba(11,27,51,.62));
}
.media-frame--21x9{aspect-ratio:21/9}
.media-frame--16x9{aspect-ratio:16/9}
.media-frame--4x3{aspect-ratio:4/3}
.media-frame--1x1{aspect-ratio:1/1}
.media-frame--3x4{aspect-ratio:3/4}
.media-frame__cap{
  position:absolute;left:0;bottom:0;z-index:2;
  padding:8px 12px;font-family:var(--font-mono);font-size:11px;letter-spacing:.10em;
  color:var(--paper);background:rgba(11,27,51,.78);border-top:1px solid var(--line-2);border-right:1px solid var(--line-2);
}

/* 14 · 正文容器 -------------------------------------------- */
.prose{max-width:72ch;font-size:16px;color:var(--paper)}
.prose > * + *{margin-top:16px}
.prose h2{font-size:clamp(22px,2.6vw,28px);margin-top:34px}
.prose h3{font-size:19px;margin-top:26px}
.prose p{color:var(--gray)}
.prose strong{color:var(--paper)}
.prose ul,.prose ol{padding-left:20px;display:flex;flex-direction:column;gap:8px;color:var(--gray)}
.prose ul{list-style:square}
.prose ol{list-style:decimal}
.prose li::marker{color:var(--amber)}
.prose a{color:var(--amber);border-bottom:1px solid rgba(217,154,43,.45)}
.prose a:hover{border-bottom-color:var(--amber)}
.prose blockquote{
  margin:24px 0;padding:14px 18px;border-left:3px solid var(--amber);
  background:rgba(19,40,69,.6);color:var(--paper);font-size:15px;
}
.prose code{font-family:var(--font-mono);font-size:.92em;color:var(--amber);background:rgba(217,154,43,.10);padding:1px 5px;border-radius:var(--radius)}

/* 15 · 显现动效 -------------------------------------------- */
[data-reveal]{opacity:0;transform:translateY(14px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
[data-reveal].is-visible{opacity:1;transform:none}

/* 16 · 响应式 ---------------------------------------------- */
@media (min-width:900px){
  .footer-top{grid-template-columns:1.15fr 1.7fr 1.15fr;gap:44px}
}
@media (max-width:1080px){
  .rail-regions{display:none}
}
@media (max-width:980px){
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;left:0;right:0;top:100%;
    display:block;margin-left:0;
    padding:14px 16px 22px;
    background:linear-gradient(180deg,#132845,#0A1729);
    border-bottom:1px solid var(--line-2);
    box-shadow:0 24px 40px -28px rgba(0,0,0,.9);
    opacity:0;visibility:hidden;max-height:0;overflow:hidden;
    transform:translateY(-8px);
    transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s var(--ease),max-height .24s var(--ease);
  }
  .site-nav[data-open]{
    opacity:1;visibility:visible;transform:none;
    max-height:calc(100vh - 104px);overflow:auto;
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-item + .nav-item{border-top:1px solid var(--line)}
  .nav-link{width:100%;padding:14px 6px;font-size:15px;border:0;border-radius:0;align-items:center}
  .nav-link:hover{transform:none;border:0;background:rgba(217,154,43,.10)}
  .nav-link[aria-current="page"]{box-shadow:inset 3px 0 0 var(--amber);padding-left:12px}
  .nav-link__idx{font-size:11px}
  .nav-actions{padding-top:16px}
  .nav-actions .btn{flex:1}
  .bar-inner{min-height:60px}
  .brand-mark__line{display:none}
}
@media (max-width:720px){
  .section{padding:40px 0}
  .footer-top{padding:40px 0 28px;gap:30px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:12px}
  .scroll-top{margin-left:0}
  .stat__num{font-size:clamp(40px,13vw,72px)}
}
@media (max-width:520px){
  .rail-status{display:none}
  .rail-brand{font-size:11px;letter-spacing:.06em}
  .brand-mark__name{font-size:15px}
  .nav-toggle__label{display:none}
  .panel{padding:18px}
}

/* 17 · 无障碍与动效偏好 ------------------------------------ */
@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}
  .panel:hover{transform:none}
  .scroll-progress{transition:none}
}
@media print{
  body::before,.site-header,.scroll-progress,.nav-toggle,.scroll-top{display:none !important}
  body{background:#fff;color:#111}
}