/* ============================================================
   恒峰平台 · site.css
   高原暮色出版体系：深靛蓝轨道 + 奶油纸面 + 鎏金刻度
   ============================================================ */

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

/* ---------- 1. Tokens ---------- */
:root{
  --ink-900:#111C33;
  --ink-800:#1B2A4A;
  --paper:#F7F4EE;
  --paper-dim:#EFEAE1;
  --gold:#C9A24B;
  --gold-soft:#E3C98A;
  --white:#FFFFFF;
  --rock:#5E6673;
  --black:#1F2430;
  --qing:#2F8F9D;
  --flag-red:#B6483C;
  --flag-yellow:#E0A93B;
  --flag-green:#4F7A5A;

  --font-display:"Source Han Serif SC","Noto Serif SC","Songti SC","STSong",serif;
  --font-body:"Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,"Courier New",monospace;

  --ease:cubic-bezier(.22,.61,.36,1);
  --rail-w:96px;
  --topbar-h:68px;
  --line:rgba(27,42,74,.14);
  --line-soft:rgba(27,42,74,.08);
  --line-gold:rgba(201,162,75,.4);
  --radius:2px;
  --shadow-soft:0 20px 46px -34px rgba(17,28,51,.6);
}

/* ---------- 2. 中文排版基底 ---------- */
body{
  padding-left:var(--rail-w);
  min-height:100vh;
  background-color:var(--paper);
  background-image:
    linear-gradient(180deg,rgba(201,162,75,.07),rgba(201,162,75,0) 340px),
    linear-gradient(rgba(27,42,74,.028) 1px,transparent 1px),
    linear-gradient(90deg,rgba(27,42,74,.028) 1px,transparent 1px);
  background-size:auto,72px 72px,72px 72px;
  color:var(--black);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.8;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
h1,h2,h3,h4,h5{
  font-family:var(--font-display);
  font-weight:700;
  letter-spacing:.04em;
  line-height:1.15;
  color:var(--ink-900);
}
h1{font-size:clamp(34px,4.6vw,72px)}
h2{font-size:clamp(26px,3vw,42px)}
h3{font-size:clamp(19px,1.8vw,26px)}
strong{font-weight:600}
::selection{background:var(--gold);color:var(--ink-900)}
:focus-visible{outline:2px solid var(--gold);outline-offset:3px;border-radius:2px}
.rail :focus-visible{outline-color:var(--gold-soft)}
#main-content{scroll-margin-top:calc(var(--topbar-h) + 16px)}

/* ---------- 3. 容器与章节 ---------- */
.container{width:100%;max-width:1280px;margin-inline:auto;padding-inline:clamp(18px,4vw,56px)}
.section{position:relative;padding-block:clamp(52px,7vw,110px)}
.section--tight{padding-block:clamp(32px,4vw,64px)}
.section--dark{
  background:linear-gradient(165deg,#1B2A4A 0%,#15223C 58%,#111C33 100%);
  color:rgba(247,244,238,.78);
  border-block:1px solid rgba(201,162,75,.22);
}
.section--dark h1,.section--dark h2,.section--dark h3,.section--dark .section-title{color:var(--paper)}
.section--dark .lede{color:rgba(247,244,238,.66)}
.section--dark .eyebrow{color:rgba(227,201,138,.85)}
.section__head{display:flex;flex-direction:column;gap:12px;margin-bottom:clamp(22px,3vw,44px)}
.eyebrow{
  display:inline-flex;align-items:center;gap:.7em;
  font-family:var(--font-mono);font-size:12px;font-weight:500;
  letter-spacing:.24em;text-transform:uppercase;color:var(--rock);
}
.eyebrow::before{content:"";width:20px;height:2px;background:var(--gold);flex:none}
.section-title{font-family:var(--font-display);font-weight:700;letter-spacing:.04em;line-height:1.15;color:var(--ink-900)}
.lede{max-width:62ch;font-size:clamp(15px,1.05vw,17px);line-height:1.85;color:var(--rock)}
.rule{height:1px;width:100%;background:var(--line);border:0}

/* ---------- 4. 栅格 ---------- */
.grid{display:grid;gap:clamp(20px,3vw,40px)}
.grid--split{grid-template-columns:minmax(0,7fr) minmax(0,5fr)}
.grid--halves{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--thirds{grid-template-columns:repeat(3,minmax(0,1fr))}

/* ---------- 5. 面板 ---------- */
.panel{padding:clamp(20px,2.6vw,34px);border:1px solid var(--line);background:var(--paper);border-radius:var(--radius)}
.panel--solid{background:rgba(255,255,255,.62);box-shadow:var(--shadow-soft)}
.panel--glass{
  background:rgba(255,255,255,.1);
  border:1px solid rgba(255,255,255,.24);
  -webkit-backdrop-filter:blur(14px) saturate(1.2);
  backdrop-filter:blur(14px) saturate(1.2);
  color:rgba(247,244,238,.86);
  border-radius:var(--radius);
}
.panel--glass h2,.panel--glass h3{color:var(--paper)}

/* ---------- 6. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  padding:.64em 1.15em;border:1px solid transparent;border-radius:var(--radius);
  font-family:var(--font-body);font-size:14px;font-weight:500;letter-spacing:.04em;
  line-height:1.4;cursor:pointer;white-space:nowrap;
  transition:background-color .3s var(--ease),color .3s var(--ease),border-color .3s var(--ease);
}
.btn--gold{background:var(--gold);border-color:var(--gold);color:#231906}
.btn--gold:hover{background:var(--gold-soft);border-color:var(--gold-soft)}
.btn--ghost{background:transparent;border-color:rgba(27,42,74,.3);color:var(--ink-800)}
.btn--ghost:hover{border-color:var(--ink-800);background:rgba(27,42,74,.06)}

/* ---------- 7. 状态标签与状态条 ---------- */
.chip{
  display:inline-flex;align-items:center;gap:.45em;
  padding:.24em .7em;border:1px solid rgba(27,42,74,.2);border-radius:999px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.08em;line-height:1.6;
  color:var(--ink-800);white-space:nowrap;
}
.chip__dot{width:6px;height:6px;border-radius:50%;background:currentColor;flex:none}
.chip--version{color:var(--ink-800);background:rgba(201,162,75,.14);border-color:rgba(201,162,75,.55)}
.chip--qing{color:#1E626C;background:rgba(47,143,157,.14);border-color:rgba(47,143,157,.45)}
.chip--red{color:#8F3229;background:rgba(182,72,60,.13);border-color:rgba(182,72,60,.42)}
.chip--yellow{color:#8A6314;background:rgba(224,169,59,.16);border-color:rgba(224,169,59,.5)}
.chip--green{color:#356042;background:rgba(79,122,90,.15);border-color:rgba(79,122,90,.45)}

.status-strip{
  display:flex;flex-wrap:wrap;
  border:1px solid var(--line);
  background:rgba(255,255,255,.55);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  border-radius:var(--radius);
}
.status-strip__item{
  flex:1 1 180px;display:flex;flex-direction:column;gap:4px;
  padding:14px clamp(14px,2vw,22px);
  border-right:1px solid var(--line-soft);
}
.status-strip__item:last-child{border-right:0}
.status-strip__label{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.22em;color:var(--rock)}
.status-strip__value{font-size:14.5px;color:var(--ink-900);display:flex;align-items:center;gap:8px}
.status-dot{width:8px;height:8px;border-radius:50%;display:inline-block;flex:none;background:var(--rock)}
.status-dot--qing{background:var(--qing)}
.status-dot--red{background:var(--flag-red)}
.status-dot--yellow{background:var(--flag-yellow)}
.status-dot--green{background:var(--flag-green)}

/* ---------- 8. 面包屑 ---------- */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:.55em;font-size:13px;color:var(--rock);line-height:1.6}
.breadcrumb__link{color:var(--ink-800);border-bottom:1px solid rgba(27,42,74,.22);padding-bottom:1px}
.breadcrumb__link:hover{border-bottom-color:var(--gold);color:var(--ink-900)}
.breadcrumb__sep{color:var(--gold);font-family:var(--font-mono)}
.breadcrumb__current{color:var(--rock)}

/* ---------- 9. 正文与表格 ---------- */
.prose{max-width:68ch}
.prose h2{margin-top:2.2em;margin-bottom:.7em;font-size:clamp(22px,2.2vw,30px)}
.prose h3{margin-top:1.8em;margin-bottom:.6em;font-size:clamp(18px,1.6vw,22px)}
.prose p{margin-bottom:1.1em;line-height:1.9}
.prose ul,.prose ol{margin:0 0 1.2em;padding-left:1.3em;list-style:disc}
.prose ol{list-style:decimal}
.prose li{margin-bottom:.5em}
.prose a{color:var(--ink-800);border-bottom:1px solid var(--gold)}
.prose strong{color:var(--ink-900)}

.table-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:rgba(255,255,255,.5)}
.data-table{min-width:560px;font-size:14.5px}
.data-table th{
  background:var(--ink-900);color:var(--paper);
  font-family:var(--font-body);font-size:12.5px;font-weight:500;letter-spacing:.08em;
  text-align:left;padding:13px 16px;white-space:nowrap;
}
.data-table td{padding:13px 16px;border-top:1px solid var(--line-soft);color:var(--ink-black);vertical-align:top}
.data-table tbody tr:nth-child(even){background:rgba(27,42,74,.035)}
.data-table .num{font-family:var(--font-mono);font-weight:600;font-variant-numeric:tabular-nums;letter-spacing:.02em;color:var(--ink-900)}

/* ---------- 10. 核对清单 ---------- */
.checklist{display:grid;gap:2px}
.checklist__item{
  display:flex;align-items:flex-start;gap:12px;
  padding:12px 16px;border-left:2px solid rgba(79,122,90,.55);
  background:rgba(79,122,90,.06);font-size:14.5px;line-height:1.7;
}
.checklist__mark{font-family:var(--font-mono);font-size:12px;color:var(--flag-green);flex:none;padding-top:2px}

/* ---------- 11. 图像占位容器 ---------- */
.media-frame{
  position:relative;overflow:hidden;isolation:isolate;
  aspect-ratio:16/9;width:100%;
  border:1px solid var(--line);border-radius:var(--radius);
  background:linear-gradient(150deg,var(--paper-dim),#E4DED2);
}
.media-frame__img{width:100%;height:100%;object-fit:cover}
.media-frame__caption{
  position:absolute;left:0;right:0;bottom:0;
  padding:10px 14px;font-size:12.5px;line-height:1.6;
  color:rgba(247,244,238,.86);background:linear-gradient(180deg,transparent,rgba(17,28,51,.82));
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--square{aspect-ratio:1/1}
.media-frame--ridge{
  background:
    linear-gradient(180deg,rgba(27,42,74,.94),rgba(17,28,51,.98)),
    radial-gradient(120% 80% at 20% 100%,rgba(201,162,75,.28),transparent 62%);
}
.media-frame--ridge::before{
  content:"";position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.07) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.07) 1px,transparent 1px);
  background-size:32px 32px;
  -webkit-mask-image:linear-gradient(180deg,transparent,#000 88%);
  mask-image:linear-gradient(180deg,transparent,#000 88%);
}
.media-frame--ridge::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:70%;
  background:linear-gradient(180deg,rgba(247,244,238,.24),rgba(247,244,238,.04));
  clip-path:polygon(0 62%,14% 40%,26% 56%,40% 18%,54% 47%,68% 28%,82% 53%,100% 34%,100% 100%,0 100%);
}

/* ---------- 12. 头部 ---------- */
.site-header{position:sticky;top:0;z-index:70;font-family:var(--font-body)}
.skip-link{
  position:fixed;top:10px;left:10px;z-index:200;
  padding:.7em 1.1em;background:var(--gold);color:#231906;
  font-size:14px;font-weight:600;border-radius:var(--radius);
  transform:translateY(-180%);
  transition:transform .22s var(--ease);
}
.skip-link:focus-visible{transform:none}

/* 12.1 品牌轨道 */
.rail{
  position:fixed;top:0;left:0;bottom:0;width:var(--rail-w);z-index:80;
  display:flex;flex-direction:column;align-items:center;
  padding:20px 0 16px;
  background:linear-gradient(180deg,#1B2A4A 0%,#16233E 58%,#111C33 100%);
  border-right:1px solid rgba(201,162,75,.24);
  color:var(--paper);
  overflow:hidden;
}
.rail::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:24px 24px;
  opacity:.55;
}
.rail > *{position:relative;z-index:1}
.rail-close{display:none}
.rail-brand{display:flex;flex-direction:column;align-items:center;gap:12px;color:var(--paper)}
.rail-brand__seal{
  width:38px;height:38px;display:grid;place-items:center;
  border:1px solid var(--gold);background:rgba(201,162,75,.1);
  color:var(--gold-soft);
  font-family:var(--font-display);font-weight:700;font-size:19px;line-height:1;
}
.rail-brand__word{
  writing-mode:vertical-rl;text-orientation:upright;
  font-family:var(--font-display);font-weight:700;font-size:15px;
  letter-spacing:.28em;color:rgba(247,244,238,.92);
}
.rail-nav{
  flex:1 1 auto;width:100%;
  display:flex;align-items:center;justify-content:center;
  padding:18px 0;
  overflow-y:auto;overflow-x:hidden;
  scrollbar-width:none;
}
.rail-nav::-webkit-scrollbar{display:none}
.rail-nav__list{display:flex;flex-direction:column;align-items:center;gap:14px;width:100%}
.rail-nav__item{width:100%;display:flex;justify-content:center}
.rail-nav__link{
  writing-mode:vertical-rl;text-orientation:upright;
  display:block;padding:10px 3px;
  font-size:13.5px;font-weight:500;letter-spacing:.2em;line-height:1.1;
  color:rgba(247,244,238,.64);
  transition:color .32s var(--ease),background-color .32s var(--ease),box-shadow .32s var(--ease);
}
.rail-nav__num{
  font-family:var(--font-mono);font-size:9.5px;font-weight:500;
  letter-spacing:.08em;color:rgba(227,201,138,.6);
  margin-bottom:10px;
}
.rail-nav__label{display:inline}
.rail-nav__link:hover{color:var(--white);background:rgba(255,255,255,.06)}
.rail-nav__link[aria-current="page"]{
  color:var(--gold-soft);
  background:rgba(201,162,75,.14);
  box-shadow:inset 2px 0 0 var(--gold);
}
.rail-nav__link[aria-current="page"] .rail-nav__num{color:var(--gold)}
.rail-foot{display:flex;flex-direction:column;align-items:center;gap:10px;padding-top:14px;width:100%}
.rail-foot__version{
  writing-mode:vertical-rl;text-orientation:upright;
  padding:8px 3px;border:1px solid rgba(201,162,75,.36);
  font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;
  color:rgba(227,201,138,.78);
}
.rail-foot__mark{font-family:var(--font-mono);font-size:10px;letter-spacing:.22em;color:rgba(247,244,238,.34)}
.rail-progress{position:absolute;top:0;right:0;bottom:0;width:2px;background:rgba(255,255,255,.09);z-index:1}
.rail-progress__bar{display:block;width:100%;height:0;background:linear-gradient(180deg,var(--gold-soft),var(--gold))}

/* 12.2 顶部横栏 */
.topbar{
  min-height:var(--topbar-h);
  background:rgba(247,244,238,.84);
  -webkit-backdrop-filter:blur(14px) saturate(1.15);
  backdrop-filter:blur(14px) saturate(1.15);
  border-bottom:1px solid var(--line-soft);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.7);
}
.topbar__inner{
  display:flex;align-items:center;gap:clamp(10px,1.8vw,26px);
  min-height:var(--topbar-h);
  max-width:1440px;
  padding:0 clamp(16px,2.4vw,36px);
}
.topbar-brand{display:none}
.topbar-brand__dot{width:6px;height:6px;border-radius:50%;background:var(--gold)}
.topbar__tagline{
  font-size:12px;letter-spacing:.16em;color:var(--rock);white-space:nowrap;
}
.utility{display:flex;align-items:center;margin-left:auto}
.utility li{display:flex;align-items:center}
.utility li + li::before{content:"";width:1px;height:12px;background:var(--line);flex:none}
.utility__link{
  display:inline-block;padding:6px 12px;
  font-size:13.5px;color:var(--ink-800);white-space:nowrap;
  border-bottom:1px solid transparent;
  transition:color .28s var(--ease),border-color .28s var(--ease);
}
.utility__link:hover{color:var(--ink-900);border-bottom-color:var(--gold)}
.topbar__cta{flex:none}
.nav-toggle{
  display:none;align-items:center;gap:8px;
  padding:8px 10px;border:1px solid var(--line);border-radius:var(--radius);
  background:rgba(255,255,255,.55);color:var(--ink-800);
  font-size:13px;letter-spacing:.08em;
}
.nav-toggle__bars{position:relative;display:block;width:16px;height:10px;flex:none}
.nav-toggle__bars::before,.nav-toggle__bars::after,.nav-toggle__bars span{
  content:"";position:absolute;left:0;width:16px;height:1.5px;background:var(--ink-800);
  transition:transform .3s var(--ease),opacity .2s var(--ease);
}
.nav-toggle__bars::before{top:0}
.nav-toggle__bars span{top:4.5px}
.nav-toggle__bars::after{top:9px}
.nav-toggle__text{line-height:1}
.nav-scrim{display:none}

/* 12.3 抽屉开启态（横竖屏切换在媒体查询内定义） */
.site-header[data-open] .nav-toggle{border-color:var(--gold);color:var(--ink-900)}
@media (max-width:1023px){
  html.nav-open,html.nav-open body{overflow:hidden}
}

/* ---------- 13. 页脚 ---------- */
.site-footer{
  position:relative;overflow:hidden;
  margin-top:clamp(48px,7vw,96px);
  padding-top:clamp(40px,5vw,76px);
  background:linear-gradient(180deg,#16233E 0%,#111C33 42%,#0D1626 100%);
  border-top:1px solid rgba(201,162,75,.34);
  color:rgba(247,244,238,.72);
  font-family:var(--font-body);
}
.site-footer::before{
  content:"";position:absolute;inset:0 0 auto 0;height:300px;pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:40px 40px;
  -webkit-mask-image:linear-gradient(180deg,#000,transparent 88%);
  mask-image:linear-gradient(180deg,#000,transparent 88%);
}
.footer-top{position:relative;z-index:1;padding-bottom:clamp(28px,4vw,52px)}
.footer-top__inner{
  display:grid;
  grid-template-columns:1.35fr 1.15fr .95fr;
  gap:clamp(26px,4vw,64px);
}
.footer-brand__seal{
  display:grid;place-items:center;width:44px;height:44px;
  border:1px solid var(--gold);background:rgba(201,162,75,.1);
  color:var(--gold-soft);
  font-family:var(--font-display);font-weight:700;font-size:22px;line-height:1;
}
.footer-brand__name{
  margin-top:14px;
  font-family:var(--font-display);font-weight:700;font-size:22px;letter-spacing:.14em;
  color:var(--paper);
}
.footer-brand__note{
  margin-top:8px;max-width:24em;
  font-size:13.5px;line-height:1.9;color:rgba(247,244,238,.58);
}
.footer-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(14px,2vw,26px)}
.footer-col__title{
  margin-bottom:14px;
  font-family:var(--font-mono);font-size:11px;font-weight:500;
  letter-spacing:.24em;color:var(--gold-soft);
}
.footer-list{display:grid;gap:10px}
.footer-link{
  display:inline-block;
  font-size:14px;color:rgba(247,244,238,.68);
  border-bottom:1px solid transparent;padding-bottom:1px;
  transition:color .28s var(--ease),border-color .28s var(--ease);
}
.footer-link:hover{color:var(--paper);border-bottom-color:var(--line-gold)}
.footer-link[aria-current="page"]{color:var(--gold)}
.footer-contact{display:grid;gap:14px;align-content:start}
.footer-contact__row{display:grid;gap:2px}
.footer-contact__label{
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.22em;
  color:rgba(227,201,138,.76);
}
.footer-contact__value{font-size:14px;line-height:1.7;color:rgba(247,244,238,.86);word-break:break-word}
.footer-contact__value--mono{font-family:var(--font-mono);letter-spacing:.02em;font-variant-numeric:tabular-nums}
.footer-bottom{position:relative;z-index:1;border-top:1px solid rgba(255,255,255,.1);padding-block:18px}
.footer-bottom__inner{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:8px 24px;
  font-size:12.5px;color:rgba(247,244,238,.5);
}
.footer-meta{display:flex;flex-wrap:wrap;align-items:center;gap:6px 16px}
.footer-meta--note{max-width:42em;line-height:1.7}
.footer-year{font-family:var(--font-mono);letter-spacing:.04em}
.footer-icp{font-family:var(--font-mono);letter-spacing:.04em}
.footer-region{letter-spacing:.06em}

/* ---------- 14. 显现动效 ---------- */
.js-reveal{
  opacity:0;transform:translateY(18px);
  transition:opacity .46s var(--ease),transform .46s var(--ease);
  transition-delay:calc(var(--i,0) * 60ms);
}
.js-reveal.is-visible{opacity:1;transform:translateY(0)}

/* ---------- 15. 平板 ---------- */
@media (min-width:1024px) and (max-width:1279px){
  :root{--rail-w:88px;--topbar-h:64px}
  .rail-nav__link{font-size:12.5px;letter-spacing:.16em}
  .topbar__tagline{display:none}
}
@media (max-width:1180px){
  .topbar__tagline{display:none}
}

/* ---------- 16. 手机 / 抽屉 ---------- */
@media (max-width:1023px){
  :root{--rail-w:0px}
  body{padding-left:0;background-size:auto,56px 56px,56px 56px}
  .site-header{position:static}
  .skip-link{left:8px}

  /* 轨道转为抽屉 */
  .rail{
    position:fixed;top:0;left:0;bottom:0;
    width:min(330px,88vw);
    padding:18px 0 16px;
    align-items:stretch;
    transform:translateX(-104%);
    visibility:hidden;
    overflow-y:auto;
    transition:transform .34s var(--ease),visibility .34s linear;
    border-right:1px solid rgba(201,162,75,.3);
  }
  .site-header[data-open] .rail{transform:translateX(0);visibility:visible}
  .rail-close{
    display:grid;place-items:center;
    position:absolute;top:14px;right:14px;
    width:36px;height:36px;
    border:1px solid rgba(201,162,75,.4);
    color:var(--gold-soft);
    font-size:19px;line-height:1;z-index:2;
  }
  .rail-brand{flex-direction:row;align-items:center;gap:12px;padding:0 20px 16px;border-bottom:1px solid rgba(201,162,75,.24)}
  .rail-brand__seal{width:34px;height:34px;font-size:17px}
  .rail-brand__word{writing-mode:horizontal-tb;text-orientation:mixed;font-size:17px;letter-spacing:.12em}
  .rail-nav{display:block;flex:1 1 auto;padding:8px 0;overflow-y:auto}
  .rail-nav__list{gap:0;align-items:stretch}
  .rail-nav__item{justify-content:flex-start;border-bottom:1px solid rgba(255,255,255,.07)}
  .rail-nav__link{
    writing-mode:horizontal-tb;text-orientation:mixed;
    display:flex;align-items:baseline;gap:14px;
    padding:14px 22px;font-size:15px;letter-spacing:.08em;
  }
  .rail-nav__num{margin-bottom:0;font-size:11px}
  .rail-nav__link[aria-current="page"]{box-shadow:inset 3px 0 0 var(--gold)}
  .rail-foot{
    flex-direction:row;align-items:center;justify-content:space-between;
    padding:16px 22px 0;border-top:1px solid rgba(255,255,255,.09);
  }
  .rail-foot__version{writing-mode:horizontal-tb;text-orientation:mixed;padding:4px 9px}
  .rail-progress{display:none}

  /* 顶栏两行 */
  .topbar__inner{flex-wrap:wrap;gap:8px 10px;min-height:0;padding:10px 16px}
  .topbar-brand{
    display:inline-flex;align-items:center;gap:8px;order:1;
    font-family:var(--font-display);font-weight:700;font-size:19px;
    letter-spacing:.08em;color:var(--ink-900);
  }
  .topbar__cta{order:2;margin-left:auto;padding:.52em .85em;font-size:13px}
  .nav-toggle{display:inline-flex;order:3}
  .chip--version{display:none}
  .utility{
    order:4;flex-basis:100%;width:100%;margin-left:0;
    padding-top:6px;border-top:1px solid var(--line-soft);
    overflow-x:auto;scrollbar-width:none;
  }
  .utility::-webkit-scrollbar{display:none}
  .utility__link{padding:6px 10px;font-size:13px}

  /* 遮罩 */
  .nav-scrim{
    display:block;position:fixed;inset:0;z-index:75;
    background:rgba(17,28,51,.52);
    -webkit-backdrop-filter:blur(3px);
    backdrop-filter:blur(3px);
    opacity:0;pointer-events:none;
    transition:opacity .3s var(--ease);
  }
  .site-header[data-open] .nav-scrim{opacity:1;pointer-events:auto}

  /* 页脚纵向 */
  .footer-top__inner{grid-template-columns:1fr;gap:clamp(24px,6vw,40px)}
  .footer-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .data-table td:first-child,.data-table th:first-child{position:sticky;left:0;z-index:1}
  .data-table td:first-child{background:var(--paper)}
  .data-table th:first-child{background:var(--ink-900)}
  .data-table tbody tr:nth-child(even) td:first-child{background:#F2EEE6}
}

/* ---------- 17. 窄屏 ---------- */
@media (max-width:899px){
  .grid--split,.grid--halves,.grid--thirds{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .status-strip__item{flex:1 1 100%;border-right:0;border-bottom:1px solid var(--line-soft)}
  .status-strip__item:last-child{border-bottom:0}
}
@media (max-width:520px){
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom__inner{flex-direction:column;align-items:flex-start}
  .topbar-brand{font-size:17px}
}

/* ---------- 18. 减少动态 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    transition-delay:0ms !important;
  }
  .js-reveal{opacity:1;transform:none}
  .skip-link{transition:none}
}