/* ===========================================================
   澳州幸运10 · 共享站点样式 /assets/site.css
   高原数据观测站：蓝图网格 + 框景 + 玻璃层与实色层并置
   =========================================================== */

/* ---------- 1. 设计变量 ---------- */
:root{
  --ink:#0B1B2B;
  --cobalt:#12457A;
  --lake:#2E8BB8;
  --lake-soft:#A9CFE0;
  --paper:#E9EEF2;
  --sheet:#F7FAFC;
  --gold:#C9A227;
  --highland:#D9713A;
  --rule:#C3D2DC;
  --glass:rgba(255,255,255,.55);
  --body-text:#1B3245;

  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:ui-monospace,"IBM Plex Mono","SF Mono",Menlo,Consolas,monospace;

  --shell-max:1280px;
  --gutter:clamp(20px,5vw,64px);
  --rail:26px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
html,body{margin:0;padding:0}
body,h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd,pre{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
[hidden]{display:none !important}

body{
  min-height:100vh;
  background-color:var(--paper);
  background-image:
    repeating-linear-gradient(0deg,rgba(18,69,122,.045) 0 1px,transparent 1px 120px),
    repeating-linear-gradient(90deg,rgba(18,69,122,.045) 0 1px,transparent 1px 120px);
  color:var(--body-text);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}

/* ---------- 3. 中文排版与基础文本 ---------- */
h1,h2,h3,h4,.serif{
  font-family:var(--font-serif);
  font-weight:600;
  letter-spacing:-.01em;
  line-height:1.28;
  color:var(--ink);
}
h1{font-size:clamp(30px,4.6vw,52px)}
h2{font-size:clamp(24px,3.2vw,34px)}
h3{font-size:22px}
.num,.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.eyebrow{
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.14em;
  color:var(--cobalt);
  text-transform:none;
}
.lede{font-size:clamp(16px,1.6vw,18px);line-height:1.8;color:var(--body-text)}
.prose{max-width:64ch;font-size:16px;line-height:1.85;color:var(--body-text)}
.prose p + p{margin-top:1.1em}
.prose h2{margin-top:40px;margin-bottom:14px;font-size:clamp(22px,2.6vw,28px)}
.prose h3{margin-top:28px;margin-bottom:10px;font-size:19px}
.prose ul{margin:14px 0}
.prose li{position:relative;padding-left:22px;margin-top:8px}
.prose li::before{content:"";position:absolute;left:0;top:.78em;width:9px;height:1px;background:var(--lake)}
.prose a{color:var(--lake);border-bottom:1px solid rgba(46,139,184,.4)}
.prose a:hover{border-bottom-color:var(--gold);color:var(--cobalt)}
.rule{height:1px;background:var(--rule);border:0}

/* ---------- 4. 布局工具 ---------- */
.shell{
  width:100%;
  max-width:var(--shell-max);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.main{display:block;padding-bottom:clamp(48px,7vw,96px)}
.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:24px}
.col-1{grid-column:span 1}
.col-2{grid-column:span 2}
.col-3{grid-column:span 3}
.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-9{grid-column:span 9}
.col-10{grid-column:span 10}
.col-11{grid-column:span 11}
.col-12{grid-column:span 12}

/* ---------- 5. 焦点与可达性 ---------- */
:focus-visible{
  outline:2px solid var(--gold);
  outline-offset:3px;
}
.skip-link{
  position:absolute;
  top:-70px;
  left:16px;
  z-index:90;
  padding:10px 16px;
  background:var(--ink);
  color:var(--sheet);
  font-size:13px;
  letter-spacing:.06em;
  transition:top .18s var(--ease);
}
.skip-link:focus{top:12px}

/* ---------- 6. 通用按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:12px 22px;
  border:1px solid var(--cobalt);
  background:transparent;
  color:var(--cobalt);
  font-size:14px;
  font-weight:600;
  line-height:1.2;
  letter-spacing:.02em;
  transition:background .18s var(--ease),color .18s var(--ease),
             border-color .18s var(--ease),transform .18s var(--ease);
}
.btn:hover{background:var(--cobalt);color:var(--sheet)}
.btn:active{transform:translateY(1px)}
.btn--solid{background:var(--cobalt);color:var(--sheet)}
.btn--solid:hover{background:var(--lake);border-color:var(--lake)}
.btn--gold{background:var(--gold);border-color:var(--gold);color:var(--ink)}
.btn--gold:hover{background:#b08e1c;border-color:#b08e1c;color:var(--ink)}
.btn--ghost{border-color:var(--rule);color:var(--cobalt)}
.btn--ghost:hover{background:var(--sheet);color:var(--ink);border-color:var(--cobalt)}
.btn__arrow{font-family:var(--font-mono);font-size:12px}

/* ---------- 7. 面包屑 ---------- */
.crumb{padding-top:22px}
.crumb__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--cobalt);
}
.crumb__item{display:inline-flex;align-items:center;gap:10px}
.crumb__item + .crumb__item::before{content:"/";color:var(--rule)}
.crumb__link{color:var(--cobalt);border-bottom:1px solid transparent}
.crumb__link:hover{color:var(--lake);border-bottom-color:var(--gold)}
.crumb__current{color:var(--ink)}

/* ---------- 8. 区块头与结构行 ---------- */
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:16px;
  padding-bottom:14px;
  border-bottom:1px solid var(--rule);
}
.section-head__index{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--lake);
}
.section-head__title{
  font-family:var(--font-serif);
  font-size:clamp(22px,2.8vw,30px);
  font-weight:600;
  color:var(--ink);
}
.section-head__note{font-size:13px;color:var(--cobalt)}

.index-row{
  display:grid;
  grid-template-columns:64px minmax(0,1fr) auto;
  align-items:baseline;
  gap:16px;
  padding:14px 0;
  border-bottom:1px solid var(--rule);
}
.index-row__no{font-family:var(--font-mono);font-size:12px;color:var(--lake)}
.index-row__title{font-size:16px;color:var(--ink)}
.index-row__meta{
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--cobalt);
  text-align:right;
}

/* ---------- 9. 数字锚点 ---------- */
.anchor-num{display:flex;flex-direction:column;gap:10px}
.anchor-num__value{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:clamp(56px,8.5vw,88px);
  font-weight:500;
  line-height:1;
  letter-spacing:-.03em;
  color:var(--ink);
}
.anchor-num__unit{
  font-size:.28em;
  letter-spacing:.1em;
  color:var(--cobalt);
  margin-left:.4em;
  vertical-align:.85em;
}
.anchor-num__note{
  max-width:34ch;
  font-size:13px;
  line-height:1.7;
  color:var(--cobalt);
}
.anchor-num--gold .anchor-num__value{color:#8a6d12}
.anchor-num--rule{
  padding-left:18px;
  border-left:1px solid var(--rule);
}

/* ---------- 10. 状态面板与展开层 ---------- */
.status-panel{background:var(--sheet);border:1px solid var(--rule)}
.status-panel__head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:13px 18px;
  border-bottom:1px solid var(--rule);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--cobalt);
}
.status-panel__row{
  display:grid;
  grid-template-columns:minmax(0,1fr) auto;
  align-items:center;
  gap:14px;
  padding:12px 18px;
  font-size:14px;
}
.status-panel__row + .status-panel__row{border-top:1px solid rgba(195,210,220,.7)}
.status-panel__key{color:var(--cobalt)}
.status-panel__value{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:13px;
  color:var(--ink);
}

.disclosure{
  display:grid;
  grid-template-rows:0fr;
  transition:grid-template-rows .18s var(--ease);
}
.disclosure[data-open]{grid-template-rows:1fr}
.disclosure__inner{overflow:hidden;min-height:0}
.disclosure__trigger{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  width:100%;
  padding:12px 0;
  border-top:1px solid var(--rule);
  font-size:14px;
  color:var(--cobalt);
  transition:color .18s var(--ease);
}
.disclosure__trigger:hover{color:var(--lake)}
.disclosure__label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--lake);
}

/* ---------- 11. 主题筛选（只过滤当前页已有内容） ---------- */
.filter-bar{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  padding-block:14px;
  border-top:1px solid var(--rule);
  border-bottom:1px solid var(--rule);
}
.filter-btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:7px 14px;
  border:1px solid var(--rule);
  background:transparent;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--cobalt);
  transition:background .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
}
.filter-btn:hover{border-color:var(--lake);color:var(--lake)}
.filter-btn[aria-pressed="true"]{
  background:var(--lake-soft);
  border-color:var(--cobalt);
  color:var(--ink);
}
.filter-btn__count{color:var(--gold)}

/* ---------- 12. 状态标记 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 9px;
  border:1px solid var(--rule);
  background:var(--sheet);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--cobalt);
  white-space:nowrap;
}
.tag__dot{width:6px;height:6px;background:currentColor;flex:0 0 auto}
.tag--ok{color:var(--cobalt);border-color:var(--lake-soft);background:rgba(169,207,224,.28)}
.tag--tight{color:var(--highland);border-color:rgba(217,113,58,.45);background:rgba(217,113,58,.09)}
.tag--gold{color:#8a6d12;border-color:rgba(201,162,39,.45);background:rgba(201,162,39,.1)}

/* ---------- 13. 图片容器（页面阶段放置图片占位） ---------- */
.figure-frame{
  position:relative;
  background:var(--sheet);
  border:1px solid var(--rule);
  overflow:hidden;
}
.figure-frame__media{
  position:relative;
  aspect-ratio:16/9;
  background-color:var(--paper);
  background-image:
    linear-gradient(180deg,rgba(18,69,122,.10),rgba(46,139,184,.03)),
    repeating-radial-gradient(circle at 26% 76%,rgba(18,69,122,.16) 0 1px,transparent 1px 16px);
}
.figure-frame__media img{width:100%;height:100%;object-fit:cover}
.figure-frame__caption{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:10px;
  padding:12px 16px;
  border-top:1px solid var(--rule);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--cobalt);
}
.figure-frame--wide .figure-frame__media{aspect-ratio:21/9}
.figure-frame--tall .figure-frame__media{aspect-ratio:3/4}

/* ===========================================================
   14. 页头
   =========================================================== */
.site-header{position:relative;z-index:40}

/* 顶部状态条 */
.status-bar{
  background:linear-gradient(90deg,var(--ink) 0%,var(--cobalt) 62%,#0d3a63 100%);
  border-bottom:1px solid rgba(169,207,224,.14);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:rgba(169,207,224,.78);
}
.status-bar__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:44px;
  padding-block:8px;
}
.status-bar__left{
  display:inline-flex;
  align-items:center;
  gap:12px;
  min-width:0;
}
.status-bar__mark{
  width:7px;
  height:7px;
  flex:0 0 auto;
  background:var(--gold);
  box-shadow:0 0 0 3px rgba(201,162,39,.22);
}
.status-bar__brand{color:var(--sheet);letter-spacing:.2em}
.status-bar__sep{width:1px;height:12px;background:rgba(169,207,224,.3)}
.status-bar__desc{color:rgba(169,207,224,.72)}
.status-bar__stats{display:inline-flex;align-items:center;gap:clamp(10px,2vw,22px)}
.status-bar__stat{
  display:inline-flex;
  align-items:baseline;
  gap:6px;
  white-space:nowrap;
  color:rgba(169,207,224,.7);
}
.status-bar__stat b{
  font-weight:500;
  font-size:12px;
  color:var(--gold);
  font-variant-numeric:tabular-nums;
}

/* 导航带（玻璃层） */
.nav-band{
  position:sticky;
  top:0;
  z-index:40;
  background:var(--glass);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--rule);
  transition:box-shadow .2s var(--ease),background .2s var(--ease);
}
.nav-band.is-scrolled{
  background:rgba(247,250,252,.78);
  box-shadow:0 8px 24px rgba(11,27,43,.07);
}
.nav-band__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:clamp(16px,3vw,40px);
  min-height:72px;
  padding-block:12px;
}

/* 品牌标识 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
}
.brand__mark{
  position:relative;
  flex:0 0 auto;
  width:28px;
  height:28px;
  border:1px solid var(--cobalt);
}
.brand__mark::before{
  content:"";
  position:absolute;
  inset:5px;
  border:1px solid var(--lake);
  opacity:.7;
}
.brand__mark::after{
  content:"";
  position:absolute;
  inset:11px;
  background:var(--gold);
}
.brand__text{display:flex;flex-direction:column;gap:3px}
.brand__name{
  font-family:var(--font-serif);
  font-weight:600;
  font-size:20px;
  line-height:1.1;
  letter-spacing:-.01em;
  color:var(--ink);
}
.brand__descriptor{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  line-height:1;
  color:var(--cobalt);
  opacity:.75;
}

/* 移动端按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 12px;
  border:1px solid var(--cobalt);
  background:var(--sheet);
  color:var(--cobalt);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  transition:background .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{background:var(--lake-soft);color:var(--ink)}
.nav-toggle__bars{
  position:relative;
  display:block;
  width:16px;
  height:10px;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  height:1px;
  background:currentColor;
}
.nav-toggle__bars::before{top:0}
.nav-toggle__bars::after{bottom:0}

/* 栏目索引（桌面：右端） */
.site-nav{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  flex-wrap:wrap;
  gap:clamp(6px,1.4vw,20px);
}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  padding:8px 0;
  font-size:13px;
  line-height:1.4;
  color:var(--cobalt);
  white-space:nowrap;
  transition:color .18s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:1px;
  background:var(--lake);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .2s var(--ease),background .2s var(--ease);
}
.nav-link:hover{color:var(--lake)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--ink);font-weight:600}
.nav-link[aria-current="page"]::after{
  height:2px;
  background:var(--gold);
  transform:scaleX(1);
}

/* 左侧常驻纵向刻度尺 */
.tick-rail{
  position:fixed;
  left:0;
  top:0;
  bottom:0;
  z-index:30;
  width:var(--rail);
  display:none;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:10px;
  pointer-events:none;
}
.tick-rail__value{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.08em;
  color:var(--cobalt);
  font-variant-numeric:tabular-nums;
}
.tick-rail__track{
  position:relative;
  width:1px;
  height:38vh;
  background:var(--rule);
  overflow:hidden;
}
.tick-rail__fill{
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,var(--lake),var(--gold));
  transform:scaleY(0);
  transform-origin:top;
}
.tick-rail__label{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.12em;
  color:var(--rule);
  writing-mode:vertical-rl;
}

/* ===========================================================
   15. 页脚
   =========================================================== */
.site-footer{
  position:relative;
  margin-top:clamp(64px,9vw,120px);
  background:var(--ink);
  color:rgba(233,238,242,.82);
  border-top:1px solid var(--cobalt);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(to right,rgba(169,207,224,.055) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(169,207,224,.055) 1px,transparent 1px);
  background-size:72px 72px;
  pointer-events:none;
}
.site-footer > *{position:relative;z-index:1}
.footer-tick{
  height:14px;
  background-image:repeating-linear-gradient(90deg,rgba(169,207,224,.34) 0 1px,transparent 1px 24px);
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(240px,1.05fr) 2.2fr;
  gap:clamp(28px,4.5vw,72px);
  padding-block:clamp(40px,5vw,64px) clamp(32px,4vw,48px);
}
.footer-lead{max-width:40ch}
.brand--footer .brand__mark{border-color:rgba(169,207,224,.55)}
.brand--footer .brand__mark::before{border-color:rgba(169,207,224,.6)}
.brand--footer .brand__name{color:var(--sheet)}
.brand--footer .brand__descriptor{color:rgba(169,207,224,.72);opacity:1}
.footer-summary{
  margin-top:18px;
  font-size:14px;
  line-height:1.85;
  color:rgba(233,238,242,.7);
}
.footer-stats{
  display:flex;
  flex-wrap:wrap;
  gap:clamp(18px,3vw,36px);
  margin-top:26px;
  padding-top:20px;
  border-top:1px solid rgba(169,207,224,.18);
}
.footer-stat{display:flex;flex-direction:column;gap:5px}
.footer-stat__num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:26px;
  line-height:1;
  color:var(--gold);
}
.footer-stat__label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:rgba(169,207,224,.7);
}
.footer-cols{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:clamp(20px,3vw,36px);
}
.footer-col__title{
  margin-bottom:16px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.16em;
  color:var(--lake);
}
.footer-list li + li{margin-top:10px}
.footer-link{
  display:inline-block;
  font-size:14px;
  color:rgba(233,238,242,.78);
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-link:hover{color:var(--sheet);border-bottom-color:var(--gold)}
.footer-contact{
  margin-top:18px;
  display:flex;
  flex-direction:column;
  gap:10px;
}
.footer-contact__row{
  display:flex;
  align-items:baseline;
  flex-wrap:wrap;
  gap:8px;
  font-size:12px;
}
.footer-contact__key{
  flex:0 0 auto;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.14em;
  color:rgba(169,207,224,.55);
}
.footer-contact__address{font-size:12px;color:rgba(233,238,242,.6)}
.footer-contact__note{
  font-size:11px;
  line-height:1.7;
  color:rgba(169,207,224,.55);
}
.footer-base{
  border-top:1px solid rgba(169,207,224,.16);
  background:rgba(11,27,43,.6);
}
.footer-base__inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding-block:20px;
}
.footer-legal,
.footer-revision{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.06em;
  color:rgba(169,207,224,.62);
}
.footer-legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:14px;
}

/* 复制按钮 */
.copy-btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  max-width:100%;
  padding:2px 0;
  border:0;
  border-bottom:1px dashed rgba(169,207,224,.42);
  background:none;
  color:rgba(233,238,242,.84);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  text-align:left;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.copy-btn:hover{color:var(--gold);border-bottom-color:var(--gold)}
.copy-btn__value{word-break:break-all}
.copy-btn__hint{
  flex:0 0 auto;
  font-size:10px;
  letter-spacing:.12em;
  color:rgba(169,207,224,.72);
}
.copy-btn--inline{font-size:11px}

/* ===========================================================
   16. 显现动画
   =========================================================== */
html.js [data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .44s var(--ease),transform .44s var(--ease);
}
html.js [data-reveal].is-visible{opacity:1;transform:none}

/* ===========================================================
   17. 响应式
   =========================================================== */
@media (max-width:1180px){
  .nav-link{font-size:12.5px}
  .site-nav{gap:10px}
}
@media (max-width:1080px){
  .grid-12{gap:20px}
}
@media (min-width:1024px){
  .tick-rail{display:flex}
}
@media (max-width:960px){
  .footer-grid{grid-template-columns:1fr}
  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:900px){
  .nav-toggle{display:inline-flex}
  .nav-band__inner{min-height:64px}
  .site-nav{
    position:absolute;
    left:0;
    right:0;
    top:100%;
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    flex-wrap:nowrap;
    gap:0;
    padding:8px var(--gutter) 20px;
    background:var(--sheet);
    border-top:1px solid var(--rule);
    border-bottom:1px solid var(--cobalt);
    max-height:calc(100vh - 64px);
    overflow-y:auto;
    opacity:0;
    visibility:hidden;
    transform:translateY(-8px);
    transition:opacity .18s var(--ease),transform .18s var(--ease),visibility .18s linear;
    counter-reset:navitem;
  }
  .site-nav[data-open]{
    opacity:1;
    visibility:visible;
    transform:none;
  }
  .nav-link{
    width:100%;
    justify-content:flex-start;
    gap:14px;
    padding:14px 0;
    font-size:15px;
    border-bottom:1px solid var(--rule);
    white-space:normal;
  }
  .nav-link::before{
    counter-increment:navitem;
    content:counter(navitem,decimal-leading-zero);
    font-family:var(--font-mono);
    font-size:11px;
    letter-spacing:.1em;
    color:var(--lake);
  }
  .nav-link::after{display:none}
  .nav-link[aria-current="page"]{
    color:var(--ink);
    border-bottom-color:rgba(201,162,39,.55);
  }
  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr));gap:16px}
  .col-1,.col-2,.col-3,.col-4,.col-5,.col-6,
  .col-7,.col-8,.col-9,.col-10,.col-11,.col-12{grid-column:1 / -1}
  .index-row{grid-template-columns:56px minmax(0,1fr);gap:12px}
  .index-row__meta{grid-column:2;text-align:left}
  .anchor-num--rule{padding-left:14px}
}
@media (max-width:640px){
  body{font-size:15px}
  .status-bar__desc,.status-bar__sep{display:none}
  .status-bar__stats .status-bar__stat:nth-child(2){display:none}
  .footer-cols{grid-template-columns:1fr}
  .footer-base__inner{flex-direction:column;align-items:flex-start;gap:10px}
  .figure-frame--wide .figure-frame__media{aspect-ratio:16/9}
}

/* ===========================================================
   18. 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;
  }
  html.js [data-reveal]{opacity:1;transform:none}
  .disclosure{transition:none}
}