/* ==========================================================================
   LEYU 主站 · /assets/site.css
   共享外壳：reset / 令牌 / 中文排版 / 头部 / 页脚 / 通用组件 / 响应式
   ========================================================================== */

/* 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,li,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit}
table{border-collapse:collapse;width:100%}
[hidden]{display:none!important}
#main-content{scroll-margin-top:96px}

/* 1. 设计令牌 -------------------------------------------------------------- */
:root{
  --ink-900:#05070E;
  --panel-900:#0B1220;
  --card-900:#131C2F;
  --line-700:#22304C;
  --white:#E9EEF7;
  --muted:#8C99B5;
  --lime:#B6FF2E;
  --violet:#7B5CFF;
  --cyan:#35E0C4;
  --orange:#FF7A3D;

  --font-display:"Archivo Black",Impact,Haettenschweiler,"Source Han Sans Heavy","Noto Sans SC",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --font-body:"Source Han Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;

  --s1:12px; --s2:24px; --s3:36px; --s4:48px; --s6:72px; --s8:96px;
  --header-h:66px;
  --thumb-h:58px;
  --radius:3px;
  --ease:cubic-bezier(.2,.8,.2,1);
  --shadow:0 1px 0 rgba(233,238,247,.03),0 22px 44px -34px rgba(0,0,0,.95);
}

/* 2. 基础排版 -------------------------------------------------------------- */
body{
  min-height:100vh;
  background-color:var(--ink-900);
  background-image:
    repeating-linear-gradient(0deg,rgba(34,48,76,.26) 0 1px,transparent 1px 48px),
    repeating-linear-gradient(90deg,rgba(34,48,76,.26) 0 1px,transparent 1px 48px),
    radial-gradient(120% 90% at 88% -12%,rgba(123,92,255,.12),transparent 62%),
    radial-gradient(90% 70% at 0% 0%,rgba(53,224,196,.06),transparent 55%);
  background-attachment:fixed;
  color:var(--white);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:2px}
::selection{background:rgba(182,255,46,.28);color:var(--white)}

/* 3. 工具类 ---------------------------------------------------------------- */
.display{font-family:var(--font-display);font-size:clamp(40px,7vw,96px);line-height:.95;letter-spacing:-.005em;text-transform:uppercase;color:var(--white)}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:-.02em}
.eyebrow{display:inline-block;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.24em;text-transform:uppercase;color:var(--muted)}
.lead{max-width:62ch;font-size:clamp(16px,1.6vw,19px);line-height:1.72;color:#C8D2E6}
.annotation{font-size:12.5px;line-height:1.6;color:var(--muted)}
.muted{color:var(--muted)}
.divider{height:1px;background:linear-gradient(90deg,var(--line-700),transparent);margin:var(--s2) 0}

/* 4. 容器与章节 ------------------------------------------------------------ */
.shell{width:100%;max-width:1280px;margin:0 auto;padding:0 clamp(16px,4vw,40px)}
.shell--wide{max-width:1520px}

.section{position:relative;padding:clamp(48px,7vw,96px) 0}
.section--tight{padding:clamp(32px,4vw,56px) 0}
.section--panel{background:var(--panel-900);border-top:1px solid var(--line-700);border-bottom:1px solid var(--line-700)}

.section-head{
  display:flex;align-items:flex-end;flex-wrap:wrap;gap:14px;
  padding-bottom:14px;margin-bottom:clamp(24px,3vw,40px);
  border-bottom:1px solid var(--line-700);
  transition:border-color .3s var(--ease);
}
.section-head__idx{font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;color:var(--lime)}
.section-head__title{font-family:var(--font-display);font-size:clamp(24px,3.2vw,40px);line-height:1.04;letter-spacing:.005em;color:#C3CDE2;transition:color .3s var(--ease)}
.section-head__note{margin-left:auto;max-width:44ch;font-size:12.5px;line-height:1.55;color:var(--muted)}
.section-head.is-active{border-bottom-color:var(--lime)}
.section-head.is-active .section-head__title{color:var(--white)}

/* 5. 版式网格 -------------------------------------------------------------- */
.layout{display:grid;grid-template-columns:220px minmax(0,1fr);gap:clamp(24px,3vw,48px)}
.layout__rail{padding-right:20px;border-right:1px solid var(--line-700)}
.layout__main{min-width:0}
.rail-card{padding:14px 0;border-bottom:1px dashed rgba(34,48,76,.9)}
.rail-card:first-child{padding-top:0}
.rail-card__title{font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--lime);margin-bottom:8px}
.rail-card__text{font-size:13px;line-height:1.7;color:var(--muted)}

.grid{display:grid;gap:clamp(16px,2vw,24px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}
.grid--7-5{grid-template-columns:7fr 5fr}
.grid--3-9{grid-template-columns:3fr 9fr}

/* 6. 头部 ------------------------------------------------------------------ */
.skip-link{
  position:absolute;left:12px;top:-64px;z-index:200;
  padding:10px 16px;background:var(--lime);color:var(--ink-900);
  font-size:13px;font-weight:700;text-decoration:none;border-radius:2px;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:10px}

.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(5,7,14,.94);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line-700);
}
.site-header__rail{display:block;height:3px;background:repeating-linear-gradient(90deg,var(--line-700) 0 1px,transparent 1px 12px)}
.site-header__inner{display:flex;align-items:center;gap:clamp(14px,2vw,28px);min-height:var(--header-h)}

.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;text-decoration:none}
.brand__mark{
  display:grid;place-items:center;width:38px;height:38px;flex:0 0 auto;
  border:1px solid var(--line-700);background:var(--card-900);border-radius:2px;
  color:var(--lime);font-family:var(--font-mono);font-weight:700;font-size:13px;letter-spacing:.06em;
}
.brand__lockup{display:flex;flex-direction:column;line-height:1.2}
.brand__name{font-family:var(--font-display);font-size:16px;letter-spacing:.08em;text-transform:uppercase;color:var(--white)}
.brand__sub{font-size:11px;color:var(--muted);letter-spacing:.02em}
.brand--footer .brand__name{font-size:18px}

.cmdbar{flex:1 1 auto;min-width:0}
.cmdbar__list{display:flex;align-items:stretch;gap:2px;overflow:hidden}
.cmdbar__item{display:flex}
.cmdbar__link{
  position:relative;display:flex;align-items:baseline;gap:7px;
  padding:9px 10px 11px;border-radius:2px;
  font-size:13px;color:var(--muted);text-decoration:none;white-space:nowrap;
  transition:color .2s var(--ease),background-color .2s var(--ease);
}
.cmdbar__idx{font-family:var(--font-mono);font-size:10px;letter-spacing:.06em;color:#3A4A6B;transition:color .2s var(--ease)}
.cmdbar__link:hover{color:var(--white);background:rgba(19,28,47,.7)}
.cmdbar__link:hover .cmdbar__idx{color:var(--lime)}
.cmdbar__link[aria-current="page"]{color:var(--white)}
.cmdbar__link[aria-current="page"] .cmdbar__idx{color:var(--lime)}
.cmdbar__link[aria-current="page"]::after{
  content:"";position:absolute;left:10px;right:10px;bottom:0;height:2px;background:var(--lime);
}
.cmdbar__caption{display:none}
.cmdbar__foot{display:none}
.cmdbar__meta{font-size:11.5px;color:var(--muted);line-height:1.5;word-break:break-all}

.header-tools{display:flex;align-items:center;gap:12px;margin-left:auto;flex:0 0 auto}
.tool-btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 12px;border:1px solid var(--line-700);background:var(--card-900);border-radius:2px;
  font-size:12.5px;letter-spacing:.03em;color:var(--white);
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.tool-btn__glyph{font-family:var(--font-mono);font-size:13px;color:var(--lime);line-height:1}
.tool-btn:hover,.tool-btn[aria-expanded="true"]{border-color:var(--lime);color:var(--lime)}

.header-hint{display:none;max-width:210px;font-size:11.5px;line-height:1.45;color:var(--muted);text-align:right}
.header-hint__link{color:var(--white);text-decoration:underline;text-decoration-color:var(--lime);text-underline-offset:3px}
.header-hint__link:hover{color:var(--lime)}

.nav-toggle{display:none;align-items:center;gap:9px;padding:8px 12px;border:1px solid var(--line-700);background:var(--card-900);border-radius:2px;font-size:12.5px;color:var(--white)}
.nav-toggle__bars{display:block;width:16px;height:9px;border-top:1.5px solid var(--lime);border-bottom:1.5px solid var(--lime);position:relative}
.nav-toggle__bars::after{content:"";position:absolute;left:0;right:0;top:50%;border-top:1.5px solid var(--lime);transform:translateY(-50%)}
.nav-toggle[aria-expanded="true"]{border-color:var(--lime);color:var(--lime)}

.scroll-progress{position:absolute;left:0;right:0;bottom:-1px;height:2px;pointer-events:none}
.scroll-progress__bar{display:block;width:0;height:100%;background:linear-gradient(90deg,var(--cyan),var(--lime));transition:width .12s linear}

/* 索引面板 */
.index-panel{
  position:absolute;top:100%;left:0;right:0;z-index:55;
  background:var(--panel-900);border-bottom:1px solid var(--line-700);box-shadow:var(--shadow);
}
.index-panel__inner{padding-top:22px;padding-bottom:26px}
.index-panel__head{display:flex;flex-wrap:wrap;align-items:baseline;gap:12px;padding-bottom:12px;margin-bottom:16px;border-bottom:1px dashed var(--line-700)}
.index-panel__title{font-family:var(--font-mono);font-size:12px;letter-spacing:.2em;text-transform:uppercase;color:var(--lime)}
.index-panel__note{font-size:12px;color:var(--muted)}
.index-panel__grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(20px,3vw,40px)}
.index-panel__coltitle{font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--muted);margin-bottom:8px}
.index-panel__list{display:flex;flex-direction:column}
.index-link{
  display:flex;align-items:baseline;gap:10px;padding:9px 6px;
  border-bottom:1px solid rgba(34,48,76,.7);color:#C8D2E6;font-size:14px;text-decoration:none;
  transition:color .2s var(--ease),padding-left .2s var(--ease),border-color .2s var(--ease);
}
.index-link__idx{font-family:var(--font-mono);font-size:10.5px;color:#3A4A6B}
.index-link:hover{color:var(--lime);padding-left:12px;border-bottom-color:rgba(182,255,46,.5)}
.index-link:hover .index-link__idx{color:var(--lime)}

/* 遮罩与底部快捷条 */
.nav-scrim{position:fixed;inset:0;z-index:65;background:rgba(5,7,14,.74);opacity:0;pointer-events:none;transition:opacity .3s var(--ease)}
body.nav-open .nav-scrim{opacity:1;pointer-events:auto}
body.nav-open{overflow:hidden}

.thumb-bar{display:none}

/* 7. 页脚 ------------------------------------------------------------------ */
.site-footer{
  margin-top:clamp(48px,7vw,96px);
  padding:clamp(40px,6vw,72px) 0 26px;
  background:var(--panel-900);
  border-top:1px solid var(--line-700);
}
.site-footer__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:clamp(24px,4vw,48px)}
.site-footer__brand{display:flex;flex-direction:column;gap:14px;align-items:flex-start}
.site-footer__desc{max-width:38ch;font-size:13.5px;line-height:1.7;color:var(--muted)}
.site-footer__metric{display:flex;align-items:baseline;gap:10px;padding-top:12px;border-top:1px dashed var(--line-700);width:100%}
.site-footer__metricnum{font-size:34px;line-height:1;color:var(--lime);font-weight:700}
.site-footer__metriclabel{font-size:12px;color:var(--muted)}

.footer-col{display:flex;flex-direction:column;gap:12px}
.footer-col__title{font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--muted)}
.footer-col__list{display:flex;flex-direction:column;gap:9px}
.footer-link{font-size:14px;color:#C8D2E6;text-decoration:none;transition:color .2s var(--ease),padding-left .2s var(--ease)}
.footer-link:hover{color:var(--lime);padding-left:6px}
.footer-link[aria-current="page"]{color:var(--lime)}

.site-footer__contact{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:12px 32px;
  margin-top:clamp(28px,4vw,44px);padding-top:22px;border-top:1px solid var(--line-700);
}
.contact-line{display:flex;gap:12px;align-items:baseline;font-size:13px;line-height:1.6}
.contact-line__k{flex:0 0 68px;font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--muted);text-transform:uppercase}
.contact-line__v{color:#C8D2E6;word-break:break-word}

.site-footer__legal{margin-top:24px;padding-top:16px;border-top:1px dashed var(--line-700);display:flex;flex-wrap:wrap;gap:8px 24px}
.legal-line{font-size:12px;color:var(--muted)}

/* 8. 通用组件 -------------------------------------------------------------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 20px;border:1px solid var(--line-700);border-radius:2px;
  background:var(--card-900);color:var(--white);
  font-size:13.5px;font-weight:700;letter-spacing:.04em;text-decoration:none;
  transition:border-color .2s var(--ease),color .2s var(--ease),background-color .2s var(--ease),transform .2s var(--ease);
}
.btn:hover{border-color:var(--lime);color:var(--lime);transform:translateY(-1px)}
.btn--primary{background:var(--lime);border-color:var(--lime);color:var(--ink-900)}
.btn--primary:hover{background:#C9FF5C;border-color:#C9FF5C;color:var(--ink-900)}
.btn--ghost{background:transparent}
.btn--sm{padding:9px 14px;font-size:12.5px}

.breadcrumb{padding-top:16px;font-size:12px;color:var(--muted)}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb__item{display:flex;align-items:center;gap:8px}
.breadcrumb__sep{color:#3A4A6B}
.breadcrumb a{color:var(--muted);text-decoration:none;transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--lime)}
.breadcrumb__current{color:var(--white)}

.prose{max-width:70ch;font-size:17px;line-height:1.78;color:#CDD6E6}
.prose>*+*{margin-top:1.1em}
.prose h2{font-family:var(--font-display);font-size:clamp(22px,2.6vw,32px);line-height:1.16;color:var(--white);margin-top:2em}
.prose h3{font-size:18px;line-height:1.4;color:var(--white);margin-top:1.6em}
.prose a{color:var(--lime);text-decoration:none;border-bottom:1px solid rgba(182,255,46,.42)}
.prose a:hover{border-bottom-color:var(--lime)}
.prose strong{color:var(--white)}
.prose ul{display:flex;flex-direction:column;gap:.5em}
.prose ul li{position:relative;padding-left:20px}
.prose ul li::before{content:"";position:absolute;left:0;top:.72em;width:9px;height:1px;background:var(--lime)}
.prose blockquote{border-left:2px solid rgba(123,92,255,.7);padding-left:18px;color:var(--muted);font-size:16px}

.card{
  position:relative;padding:clamp(16px,2vw,24px);
  background:var(--card-900);border:1px solid var(--line-700);border-radius:var(--radius);
  box-shadow:var(--shadow);
  transition:border-color .25s var(--ease),transform .25s var(--ease);
}
.card:hover{border-color:var(--lime);transform:translateY(-2px)}
.card__head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}
.card__title{font-size:17px;font-weight:700;line-height:1.4;color:var(--white)}
.card__meta{font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--muted);white-space:nowrap}
.card__body{font-size:15px;line-height:1.72;color:#C8D2E6}
.card__foot{display:flex;align-items:center;gap:12px;margin-top:16px;padding-top:12px;border-top:1px solid var(--line-700)}

.stat{display:flex;flex-direction:column;gap:6px}
.stat__value{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:clamp(32px,5vw,64px);line-height:1;font-weight:700;letter-spacing:-.03em;color:var(--lime)}
.stat__unit{font-family:var(--font-mono);font-size:14px;color:var(--muted);margin-left:6px}
.stat__label{font-size:13px;color:var(--muted)}
.stat-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1px;background:var(--line-700);border:1px solid var(--line-700);border-radius:var(--radius);overflow:hidden}
.stat-row .stat{padding:18px 20px;background:var(--ink-900)}

.tag{display:inline-flex;align-items:center;gap:6px;padding:4px 8px;border:1px solid var(--line-700);border-radius:2px;font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.tag--lime{color:var(--lime);border-color:rgba(182,255,46,.4)}
.tag--violet{color:#9A86FF;border-color:rgba(123,92,255,.7)}

.board{position:relative;padding:clamp(18px,2.4vw,28px);background:var(--panel-900);border:1px solid var(--line-700);border-radius:var(--radius)}
.board::before,.board::after{content:"";position:absolute;width:14px;height:14px;border-style:solid;border-color:var(--lime);opacity:.85}
.board::before{top:-1px;left:-1px;border-width:2px 0 0 2px}
.board::after{bottom:-1px;right:-1px;border-width:0 2px 2px 0}
.board__head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:12px;margin-bottom:16px;border-bottom:1px dashed var(--line-700)}
.board__title{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.2em;text-transform:uppercase;color:var(--muted)}
.board__body{min-width:0}
.board__grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:clamp(16px,2vw,24px)}

.brief{padding:16px 20px;border-left:2px solid var(--lime);background:linear-gradient(90deg,rgba(182,255,46,.08),transparent 72%)}
.brief__label{display:block;margin-bottom:8px;font-family:var(--font-mono);font-size:11px;letter-spacing:.22em;text-transform:uppercase;color:var(--lime)}
.brief__text{font-size:16px;line-height:1.75;color:#DBE3F2}

.evidence{padding:18px 20px;border:1px dashed var(--line-700);background:rgba(19,28,47,.5);border-radius:var(--radius)}
.evidence__title{margin-bottom:10px;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--muted)}
.evidence__list{display:flex;flex-direction:column;gap:8px}
.evidence__item{position:relative;padding-left:20px;font-size:13.5px;line-height:1.65;color:var(--muted)}
.evidence__item::before{content:"—";position:absolute;left:0;color:rgba(123,92,255,.9)}

.glossary{display:grid;grid-template-columns:170px minmax(0,1fr);gap:1px;background:var(--line-700);border:1px solid var(--line-700);border-radius:var(--radius);overflow:hidden}
.glossary__term,.glossary__desc{padding:12px 14px;background:var(--ink-900)}
.glossary__term{font-family:var(--font-mono);font-size:12.5px;letter-spacing:.04em;color:var(--cyan)}
.glossary__desc{font-size:13.5px;line-height:1.65;color:var(--muted)}

.further{display:flex;flex-direction:column;border-top:1px solid var(--line-700)}
.further__item{border-bottom:1px solid var(--line-700)}
.further__link{display:flex;align-items:center;gap:12px;padding:14px 4px;font-size:14.5px;color:#C8D2E6;text-decoration:none;transition:color .2s var(--ease),padding-left .2s var(--ease)}
.further__link::before{content:"→";font-family:var(--font-mono);color:#3A4A6B;transition:color .2s var(--ease)}
.further__link:hover{color:var(--lime);padding-left:10px}
.further__link:hover::before{color:var(--lime)}

.meter{display:flex;flex-direction:column;gap:6px}
.meter__label{display:flex;justify-content:space-between;gap:12px;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.06em;color:var(--muted)}
.meter__label span:last-child{color:var(--white)}
.meter__track{position:relative;height:6px;background:var(--card-900);border:1px solid var(--line-700);overflow:hidden}
.meter__fill{display:block;height:100%;width:0;background:linear-gradient(90deg,rgba(123,92,255,.7),var(--lime));transition:width .8s var(--ease)}

.table-wrap{overflow-x:auto;border:1px solid var(--line-700);border-radius:var(--radius);background:var(--panel-900)}
.data-table{min-width:520px;font-size:13.5px}
.data-table th{padding:10px 14px;background:var(--card-900);border-bottom:1px solid var(--line-700);font-family:var(--font-mono);font-size:11px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;text-align:left;color:var(--muted);white-space:nowrap}
.data-table td{padding:12px 14px;border-bottom:1px solid rgba(34,48,76,.6);color:#C8D2E6}
.data-table td:first-child{font-family:var(--font-mono);color:var(--white)}
.data-table tbody tr:hover td{background:rgba(182,255,46,.05);color:var(--white)}
.data-table tbody tr:last-child td{border-bottom:0}

/* 9. 图片容器 -------------------------------------------------------------- */
.media{margin:0}
.media__frame{
  position:relative;overflow:hidden;border:1px solid var(--line-700);border-radius:var(--radius);
  aspect-ratio:16/9;background-color:var(--card-900);
  background-image:
    linear-gradient(135deg,rgba(123,92,255,.12),rgba(53,224,196,.06)),
    repeating-linear-gradient(45deg,rgba(34,48,76,.5) 0 1px,transparent 1px 12px);
}
.media__frame::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,7,14,0) 46%,rgba(5,7,14,.72));pointer-events:none}
.media__img{width:100%;height:100%;object-fit:cover;filter:saturate(.92) contrast(1.06)}
.media__caption{margin-top:8px;font-size:12px;line-height:1.55;color:var(--muted)}
.media--wide .media__frame{aspect-ratio:21/9}
.media--tall .media__frame{aspect-ratio:4/5}
.media--square .media__frame{aspect-ratio:1/1}

/* 10. 滚动显现 ------------------------------------------------------------- */
[data-reveal]{opacity:0;transform:translateY(14px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
[data-reveal].is-visible{opacity:1;transform:none}

/* 11. 响应式 --------------------------------------------------------------- */
@media (min-width:1360px){
  .header-hint{display:block}
}
@media (max-width:1024px){
  .layout{grid-template-columns:minmax(0,1fr)}
  .layout__rail{padding-right:0;padding-bottom:16px;border-right:0;border-bottom:1px solid var(--line-700)}
  .grid--3,.grid--4,.grid--7-5,.grid--3-9{grid-template-columns:repeat(2,minmax(0,1fr))}
  .site-footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:1080px){
  body{padding-bottom:var(--thumb-h)}
  .nav-toggle{display:inline-flex}
  .header-tools{margin-left:auto}
  .tool-btn__text{display:none}

  .cmdbar{
    position:fixed;top:0;right:0;bottom:0;z-index:70;
    display:flex;flex-direction:column;gap:var(--s2);
    width:min(86vw,360px);
    padding:calc(var(--header-h) + 28px) 20px calc(var(--thumb-h) + 32px);
    background:var(--panel-900);border-left:1px solid var(--line-700);
    box-shadow:-30px 0 70px -34px #000;
    overflow-y:auto;overscroll-behavior:contain;
    transform:translateX(102%);
    transition:transform .32s var(--ease);
  }
  .cmdbar[data-open]{transform:translateX(0)}
  .cmdbar__caption{display:block;font-family:var(--font-mono);font-size:11px;letter-spacing:.24em;text-transform:uppercase;color:var(--muted)}
  .cmdbar__list{flex-direction:column;gap:0;overflow:visible}
  .cmdbar__item{border-bottom:1px solid var(--line-700)}
  .cmdbar__link{padding:15px 4px;font-size:16px;gap:12px;border-radius:0}
  .cmdbar__idx{font-size:11px}
  .cmdbar__link[aria-current="page"]::after{left:0;right:auto;top:14px;bottom:14px;width:2px;height:auto}
  .cmdbar__foot{display:flex;flex-direction:column;gap:10px;margin-top:auto;padding-top:16px;border-top:1px dashed var(--line-700)}

  .index-panel__grid{grid-template-columns:minmax(0,1fr)}
  .index-panel__inner{padding-top:18px;padding-bottom:20px}

  .thumb-bar{
    display:grid;grid-template-columns:repeat(4,1fr);
    position:fixed;left:0;right:0;bottom:0;z-index:66;
    height:var(--thumb-h);padding-bottom:env(safe-area-inset-bottom);
    background:rgba(11,18,32,.97);
    -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
    border-top:1px solid var(--line-700);
  }
  .thumb-bar__link{
    display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;
    padding:0 3px;font-size:10px;line-height:1.2;text-align:center;
    color:var(--muted);text-decoration:none;
    transition:color .2s var(--ease);
  }
  .thumb-bar__idx{font-family:var(--font-mono);font-size:9px;letter-spacing:.08em;color:#3A4A6B}
  .thumb-bar__link[aria-current="page"]{color:var(--lime)}
  .thumb-bar__link[aria-current="page"] .thumb-bar__idx{color:var(--lime)}
}
@media (max-width:640px){
  body{font-size:16px}
  .grid--2,.grid--3,.grid--4,.grid--7-5,.grid--3-9{grid-template-columns:minmax(0,1fr)}
  .site-footer__grid{grid-template-columns:minmax(0,1fr)}
  .glossary{grid-template-columns:minmax(0,1fr)}
  .brand__sub{display:none}
  .section-head__note{margin-left:0;max-width:100%}
  .contact-line{flex-direction:column;gap:2px}
  .contact-line__k{flex:none}
}

/* 12. 动效尊重 ------------------------------------------------------------- */
@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}
  .scroll-progress__bar{transition:none}
  .meter__fill{transition:none}
}