/* =========================================================
   365安卓站 · 共享样式 /assets/site.css
   墨玉黑 × 奶油纸 × 安卓绿 × 丹霞赭红 × 沙金
   ========================================================= */

/* ---------- 0. 变量 ---------- */
:root{
  --ink:#14170F;
  --ink-2:#2A2A20;
  --ink-3:#3A3A2C;
  --cream:#F2E9D8;
  --gray:#DCCFB6;
  --green:#3DDC84;
  --green-deep:#146B3A;
  --red:#B3401F;
  --red-bright:#E2683C;
  --sand:#E0A93C;
  --warm:#FBF6EC;
  --focus-ring:var(--green);
  --line:2px;
  --shadow-hard:8px;
  --wrap:1240px;
  --rail:260px;
  --mono:ui-monospace,SFMono-Regular,"JetBrains Mono","Cascadia Mono",Menlo,Consolas,"Liberation Mono",monospace;
  --sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  background-color:var(--cream);
  background-image:
    repeating-linear-gradient(112deg,rgba(179,64,31,.05) 0 2px,rgba(179,64,31,0) 2px 22px),
    repeating-linear-gradient(28deg,rgba(224,169,60,.055) 0 1px,rgba(224,169,60,0) 1px 30px);
}
body{
  margin:0;
  font-family:var(--sans);
  font-size:17px;
  line-height:1.9;
  font-weight:400;
  color:var(--ink);
  background:transparent;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img,svg,video{max-width:100%;display:block}
a{color:inherit;text-decoration-thickness:1px;text-underline-offset:3px}
button{font:inherit;color:inherit}
[hidden]{display:none !important}
:focus-visible{outline:2px solid var(--focus-ring);outline-offset:3px}

/* ---------- 2. 排版 ---------- */
h1,h2,h3,h4{font-weight:800;line-height:1.16;letter-spacing:-0.01em;margin:0}
h1{font-size:clamp(34px,5.4vw,64px)}
h2{font-size:clamp(26px,3.4vw,40px)}
h3{font-size:clamp(20px,2vw,24px)}
p{margin:0;max-width:70ch}
.display{font-size:clamp(44px,9vw,120px);font-weight:900;line-height:.95;letter-spacing:-0.02em}
.batch-number{font-family:var(--mono);font-weight:700;font-size:clamp(96px,20vw,240px);line-height:.92;letter-spacing:-0.03em;display:block}
.lede{font-size:clamp(18px,2vw,22px);line-height:1.75;font-weight:500;max-width:62ch}
.note{font-size:14px;line-height:1.85;color:var(--ink-2)}
.mono-tag{
  display:inline-block;font-family:var(--mono);font-size:13px;letter-spacing:.08em;
  border:1.5px solid currentColor;padding:3px 8px;
}
.chapter-num{font-family:var(--mono);font-size:13px;font-weight:700;letter-spacing:.14em;color:var(--red)}

/* ---------- 3. 容器与分区 ---------- */
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 24px}
.wrap--narrow{max-width:900px}
.band{padding:76px 0;position:relative}
.band--cream{background:var(--cream)}
.band--paper{background:var(--gray)}
.band--ink{background:var(--ink);color:var(--warm)}
.band--ink .note{color:rgba(251,246,236,.72)}
.band--ink .mono-tag{border-color:var(--sand);color:var(--sand)}
.band--ink .chapter-num{color:var(--green)}
.band--ink a{color:var(--green)}
.band--rule{border-top:3px solid var(--red)}
.band--ink.band--rule{border-top-color:var(--sand)}
.section-head{
  display:flex;flex-wrap:wrap;gap:16px;align-items:flex-end;
  justify-content:space-between;margin-bottom:34px;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--mono);font-size:13px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--red);
}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--red)}
.band--ink .eyebrow{color:var(--green)}
.band--ink .eyebrow::before{background:var(--green)}

/* ---------- 4. 网格 ---------- */
.grid-2{display:grid;gap:28px;grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.grid-3{display:grid;gap:28px;grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.split{display:grid;gap:34px;grid-template-columns:minmax(0,7fr) minmax(0,5fr);align-items:start}
.split--5-7{grid-template-columns:minmax(0,5fr) minmax(0,7fr)}
.rail-layout{display:grid;gap:44px;grid-template-columns:var(--rail) minmax(0,1fr);align-items:start}
@media (max-width:1080px){
  .rail-layout{grid-template-columns:1fr;gap:28px}
  .rail{position:static}
}
@media (max-width:900px){
  .split,.split--5-7{grid-template-columns:1fr}
}

/* ---------- 5. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:12px 20px;border:2px solid var(--ink);background:var(--cream);color:var(--ink);
  font-size:15px;font-weight:800;line-height:1.2;text-decoration:none;cursor:pointer;
  box-shadow:4px 4px 0 var(--ink);
  transition:transform .16s ease,box-shadow .16s ease,background-color .16s ease,color .16s ease;
}
.btn:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--ink)}
.btn:active{transform:translate(0,0);box-shadow:2px 2px 0 var(--ink)}
.btn--cta{background:var(--green);color:var(--ink);border-color:var(--ink)}
.btn--dark{background:var(--ink);color:var(--warm);border-color:var(--ink);box-shadow:4px 4px 0 var(--red)}
.btn--ghost{background:transparent;color:var(--warm);border-color:var(--warm);box-shadow:4px 4px 0 rgba(251,246,236,.28)}
.btn--block{width:100%}

/* ---------- 6. 卡片 / 表格 / 标签 ---------- */
.card{
  background:var(--warm);border:var(--line) solid var(--ink);
  box-shadow:var(--shadow-hard) var(--shadow-hard) 0 var(--ink-2);
  padding:26px 26px 28px;
  transition:transform .18s ease,box-shadow .18s ease;
}
.card:hover,.card:focus-within{transform:translate(-2px,-2px);box-shadow:4px 4px 0 var(--ink-2)}
.card__title{margin:0 0 10px;font-size:22px;font-weight:800}
.card__body{margin:0;font-size:16px;line-height:1.85}
.band--ink .card{background:var(--ink-2);border-color:var(--warm);box-shadow:var(--shadow-hard) var(--shadow-hard) 0 var(--green-deep);color:var(--warm)}
.band--ink .card:hover{box-shadow:4px 4px 0 var(--green-deep)}
.band--ink .card__body{color:rgba(251,246,236,.78)}

.table-wrap{
  overflow-x:auto;border:var(--line) solid var(--ink);
  background:var(--warm);box-shadow:var(--shadow-hard) var(--shadow-hard) 0 var(--gray);
}
.table{width:100%;border-collapse:collapse;min-width:560px;font-size:15px}
.table th,.table td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--gray);vertical-align:top}
.table thead th{
  background:var(--ink);color:var(--warm);font-family:var(--mono);
  font-size:13px;letter-spacing:.08em;font-weight:700;border-bottom:0;
}
.table tbody tr:nth-child(even){background:rgba(220,207,182,.55)}
.table tbody tr:last-child td{border-bottom:0}
.table td:first-child{font-family:var(--mono);letter-spacing:.04em}

.tag{
  display:inline-block;font-family:var(--mono);font-size:12px;letter-spacing:.08em;
  padding:4px 9px;border:2px solid var(--ink);background:var(--gray);color:var(--ink);
}
.tag--green{background:var(--green);color:var(--ink)}
.tag--red{background:var(--red);color:var(--warm);border-color:var(--red)}
.band--ink .tag{border-color:var(--sand);background:transparent;color:var(--sand)}
.band--ink .tag--green{background:var(--green);border-color:var(--green);color:var(--ink)}
.status-dot{
  display:inline-block;width:10px;height:10px;margin-right:8px;
  background:var(--green);border:2px solid var(--ink);vertical-align:middle;
}

/* ---------- 7. 图片容器 ---------- */
.media{
  margin:0;position:relative;border:var(--line) solid var(--ink);
  background:var(--ink-2);overflow:hidden;
  box-shadow:var(--shadow-hard) var(--shadow-hard) 0 var(--red);
}
.media img{width:100%;aspect-ratio:16/9;object-fit:cover}
.media--4x3 img{aspect-ratio:4/3}
.media--wide img{aspect-ratio:21/9}
.media__ph{
  width:100%;aspect-ratio:16/9;display:grid;place-items:center;text-align:center;padding:18px;
  font-family:var(--mono);font-size:13px;letter-spacing:.08em;color:rgba(251,246,236,.62);
  background-image:
    linear-gradient(135deg,rgba(61,220,132,.2),rgba(20,107,58,.06) 46%,rgba(179,64,31,.28)),
    repeating-linear-gradient(90deg,rgba(251,246,236,.06) 0 1px,rgba(251,246,236,0) 1px 14px);
}
.media--4x3 .media__ph{aspect-ratio:4/3}
.media--wide .media__ph{aspect-ratio:21/9}
.media__cap{
  margin-top:12px;font-family:var(--mono);font-size:13px;
  letter-spacing:.06em;color:var(--ink-2);
}
.band--ink .media__cap{color:rgba(251,246,236,.66)}
.media-grid{display:grid;gap:28px;grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}

/* ---------- 8. 面包屑 / 时间轴 / 标签页 / 折叠组 ---------- */
.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;padding:18px 0;
  font-family:var(--mono);font-size:13px;letter-spacing:.08em;color:var(--ink-2);
}
.crumbs a{color:var(--ink-2);text-decoration:none;border-bottom:1px solid transparent}
.crumbs a:hover{color:var(--red);border-bottom-color:var(--red)}
.crumbs__sep{color:var(--sand)}
.crumbs [aria-current="page"]{color:var(--red);font-weight:700}
.band--ink .crumbs,.band--ink .crumbs a{color:rgba(251,246,236,.7)}
.band--ink .crumbs a:hover{color:var(--green)}

.rail{
  position:sticky;top:104px;align-self:start;
  border:var(--line) solid var(--ink);background:var(--ink);color:var(--warm);
  box-shadow:var(--shadow-hard) var(--shadow-hard) 0 var(--red);
  padding:18px 0;
}
.rail__title{
  margin:0;padding:0 18px 14px;
  font-family:var(--mono);font-size:13px;letter-spacing:.14em;font-weight:700;color:var(--sand);
  border-bottom:1px solid rgba(251,246,236,.16);
}
.rail__list{display:grid;gap:2px;margin:0;padding:10px 0;list-style:none}
.rail__item{
  display:flex;gap:12px;align-items:baseline;
  padding:10px 18px;font-size:14px;line-height:1.6;
  color:rgba(251,246,236,.82);text-decoration:none;
  border-left:3px solid transparent;
  transition:background-color .16s ease,border-color .16s ease,color .16s ease;
}
.rail__item:hover{background:rgba(61,220,132,.1);border-left-color:var(--green);color:var(--green)}
.rail__item[aria-current="true"]{background:rgba(61,220,132,.12);border-left-color:var(--green);color:var(--green)}
.rail__num{font-family:var(--mono);font-size:13px;color:var(--sand);flex:0 0 auto}

.tabs{display:flex;flex-wrap:wrap;gap:8px;border-bottom:2px solid var(--ink);margin-bottom:4px}
.tab{
  appearance:none;background:transparent;border:2px solid var(--ink);border-bottom:0;
  padding:10px 16px;cursor:pointer;font-family:var(--mono);font-size:13px;
  letter-spacing:.08em;font-weight:700;color:var(--ink);
  transition:background-color .16s ease,color .16s ease;
}
.tab:hover{background:var(--gray)}
.tab[aria-selected="true"],.tab.is-active{background:var(--ink);color:var(--green)}
.tab-panel{padding:26px 0 4px}
.band--ink .tabs{border-bottom-color:var(--warm)}
.band--ink .tab{border-color:var(--warm);color:var(--warm)}
.band--ink .tab[aria-selected="true"]{background:var(--green);color:var(--ink);border-color:var(--green)}

.qa{display:grid;gap:14px}
.qa__item{
  border:2px solid var(--ink);background:var(--warm);
  box-shadow:6px 6px 0 var(--gray);
  transition:box-shadow .18s ease;
}
.qa__item[open]{box-shadow:6px 6px 0 var(--red)}
.qa__q{
  list-style:none;cursor:pointer;position:relative;
  padding:16px 54px 16px 20px;font-size:17px;font-weight:800;line-height:1.6;
}
.qa__q::-webkit-details-marker{display:none}
.qa__q::after{
  content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);
  font-family:var(--mono);font-size:20px;color:var(--red);
}
.qa__item[open] .qa__q::after{content:"–"}
.qa__a{padding:16px 20px 20px;border-top:1px solid var(--gray);font-size:16px;line-height:1.85}
.band--ink .qa__item{background:var(--ink-2);border-color:var(--warm);box-shadow:6px 6px 0 var(--green-deep)}
.band--ink .qa__a{border-top-color:rgba(251,246,236,.18);color:rgba(251,246,236,.82)}

/* ---------- 9. 显现与定位高亮 ---------- */
html.has-js [data-reveal]{opacity:0;transform:translateY(18px);transition:opacity .5s ease,transform .5s ease}
html.has-js [data-reveal].is-in{opacity:1;transform:none}
.is-flash{animation:site-flash 1.6s ease-out}
@keyframes site-flash{
  0%{box-shadow:0 0 0 0 rgba(61,220,132,.9)}
  100%{box-shadow:0 0 0 16px rgba(61,220,132,0)}
}
.visually-hidden{
  position:absolute !important;width:1px;height:1px;margin:-1px;padding:0;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}

/* ---------- 10. 命令栏 ---------- */
.skip-link{
  position:absolute;left:16px;top:-120px;z-index:99;
  background:var(--green);color:var(--ink);font-weight:800;font-size:15px;
  padding:10px 16px;border:2px solid var(--ink);text-decoration:none;
  transition:top .16s ease;
}
.skip-link:focus{top:10px}
.cmd-bar{
  position:sticky;top:0;z-index:80;
  background:var(--ink);color:var(--warm);
  border-bottom:3px solid var(--green);
}
.cmd-bar.is-stuck{box-shadow:0 8px 0 rgba(20,23,15,.22)}
.scroll-progress{
  position:absolute;top:0;left:0;right:0;height:3px;
  background:rgba(61,220,132,.16);pointer-events:none;
}
.scroll-progress span{
  display:block;height:100%;width:100%;background:var(--green);
  transform:scaleX(0);transform-origin:0 50%;
}
.cmd-bar__inner{
  position:relative;width:100%;max-width:var(--wrap);margin:0 auto;
  padding:12px 24px;min-height:74px;
  display:flex;align-items:center;gap:20px;
}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;text-decoration:none;color:inherit}
.brand__mark{
  font-family:var(--mono);font-weight:700;font-size:19px;letter-spacing:.02em;
  background:var(--green);color:var(--ink);
  padding:6px 10px;border:2px solid var(--green);
  box-shadow:4px 4px 0 var(--red-bright);
}
.brand__text{display:flex;flex-direction:column;line-height:1.3}
.brand__name{font-size:19px;font-weight:800;letter-spacing:.01em}
.brand__tagline{font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:rgba(251,246,236,.62);white-space:nowrap}
.brand--foot .brand__mark{box-shadow:4px 4px 0 var(--sand)}

.cmd-nav{flex:1 1 auto;display:flex;justify-content:center;min-width:0}
.cmd-nav__list{display:flex;align-items:center;gap:2px;margin:0;padding:0;list-style:none}
.cmd-nav__link{
  display:inline-block;padding:10px 11px;white-space:nowrap;
  font-size:15px;font-weight:700;letter-spacing:.01em;
  color:rgba(251,246,236,.86);text-decoration:none;
  border-bottom:3px solid transparent;
  transition:color .16s ease,background-color .16s ease,border-color .16s ease;
}
.cmd-nav__link:hover{color:var(--green);background:rgba(61,220,132,.08)}
.cmd-nav__link[aria-current="page"]{color:var(--green);border-bottom-color:var(--green)}

.cmd-tools{display:flex;align-items:center;gap:12px;flex:0 0 auto;margin-left:auto}
.cmd-tools__btn{
  appearance:none;background:transparent;cursor:pointer;
  border:2px solid rgba(251,246,236,.3);color:var(--warm);
  font-family:var(--mono);font-size:13px;letter-spacing:.08em;
  padding:9px 12px;white-space:nowrap;
  transition:border-color .16s ease,color .16s ease,background-color .16s ease;
}
.cmd-tools__btn:hover{border-color:var(--green);color:var(--green)}
.cmd-tools__btn[aria-expanded="true"]{background:var(--green);border-color:var(--green);color:var(--ink)}
.cmd-tools__link{
  font-size:14px;font-weight:700;color:rgba(251,246,236,.86);text-decoration:none;
  padding:8px 4px;border-bottom:2px solid transparent;white-space:nowrap;
}
.cmd-tools__link:hover{color:var(--green);border-bottom-color:var(--green)}
.batch-badge{
  font-family:var(--mono);font-size:12px;letter-spacing:.08em;white-space:nowrap;
  color:var(--sand);border:2px solid var(--sand);padding:6px 9px;
}
.batch-badge b{color:var(--warm);font-weight:700}
.cmd-bar .btn{padding:10px 16px;font-size:14px;border-color:var(--green);box-shadow:3px 3px 0 var(--sand)}
.cmd-bar .btn:hover{box-shadow:5px 5px 0 var(--sand)}

.nav-toggle{
  display:none;align-items:center;gap:9px;cursor:pointer;
  background:transparent;border:2px solid var(--green);color:var(--green);
  font-family:var(--mono);font-size:13px;letter-spacing:.08em;padding:9px 12px;
  transition:background-color .16s ease,color .16s ease;
}
.nav-toggle:hover{background:rgba(61,220,132,.14)}
.nav-toggle__bars{position:relative;display:block;width:16px;height:2px;background:currentColor}
.nav-toggle__bars::before,.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:16px;height:2px;background:currentColor;
  transition:transform .18s ease;
}
.nav-toggle__bars::before{top:-5px}
.nav-toggle__bars::after{top:5px}
.nav-toggle__label{line-height:1}
.nav-toggle[aria-expanded="true"]{background:var(--green);color:var(--ink)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-5px) rotate(-45deg)}

.cmd-search{
  background:var(--ink-2);
  border-top:1px solid rgba(251,246,236,.14);
  border-bottom:3px solid var(--green);
}
.cmd-search__inner{
  max-width:var(--wrap);margin:0 auto;padding:20px 24px;
  display:flex;flex-wrap:wrap;align-items:center;gap:14px 20px;
}
.cmd-search__label{
  flex:0 0 auto;font-family:var(--mono);font-size:13px;
  letter-spacing:.1em;color:var(--sand);
}
.cmd-search__input{
  flex:1 1 240px;min-width:0;
  background:var(--ink);border:2px solid var(--green);color:var(--warm);
  font-family:var(--mono);font-size:16px;letter-spacing:.06em;
  padding:10px 14px;border-radius:0;
}
.cmd-search__input::placeholder{color:rgba(251,246,236,.45)}
.cmd-search__hint{flex:1 1 100%;margin:0;font-size:14px;line-height:1.7;color:rgba(251,246,236,.66)}
.cmd-search__hint.is-hit{color:var(--green)}
.cmd-search__hint.is-miss{color:var(--red-bright)}
.cmd-search__more{
  font-size:14px;color:var(--green);text-decoration:none;
  border-bottom:1px solid currentColor;white-space:nowrap;
}
@media (prefers-reduced-motion: no-preference){
  .cmd-search:not([hidden]){animation:panel-in .18s ease-out}
  @keyframes panel-in{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}
}

/* ---------- 11. 命令栏响应式 ---------- */
@media (max-width:1280px){
  .brand__tagline{display:none}
  .batch-badge{display:none}
}
@media (max-width:1079px){
  .nav-toggle{display:inline-flex}
  .cmd-nav{
    position:absolute;left:0;right:0;top:100%;display:none;
    background:var(--ink-2);
    border-top:1px solid rgba(251,246,236,.14);
    border-bottom:3px solid var(--green);
    padding:10px 24px 22px;
    max-height:min(72vh,560px);overflow:auto;
  }
  .cmd-nav[data-open]{display:block}
  .cmd-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .cmd-nav__link{
    display:block;padding:14px 6px;font-size:17px;font-weight:700;
    border-bottom:1px solid rgba(251,246,236,.1);
    border-left:3px solid transparent;
  }
  .cmd-nav__link:hover{background:rgba(61,220,132,.08);border-left-color:var(--green)}
  .cmd-nav__link[aria-current="page"]{
    border-bottom-color:rgba(251,246,236,.1);
    border-left-color:var(--green);padding-left:16px;
  }
}
@media (max-width:820px){
  .cmd-bar .btn--cta{display:none}
}
@media (max-width:640px){
  .cmd-bar__inner{padding:10px 16px;gap:12px;min-height:64px}
  .cmd-nav{padding:8px 16px 18px}
  .cmd-search__inner{padding:16px}
  .cmd-tools{gap:8px}
  .cmd-tools__btn{padding:8px 10px}
}
@media (max-width:520px){
  .brand__text{display:none}
  .brand__mark{font-size:17px;padding:5px 8px}
}

/* ---------- 12. 页脚 ---------- */
.site-foot{
  position:relative;background:var(--ink);color:var(--warm);
  border-top:3px solid var(--sand);padding:62px 0 28px;
}
.site-foot::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(115deg,rgba(61,220,132,.05) 0 2px,rgba(61,220,132,0) 2px 26px);
}
.site-foot__inner{position:relative;max-width:var(--wrap);margin:0 auto;padding:0 24px}
.site-foot__top{
  display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1.9fr);
  gap:44px;padding-bottom:36px;
  border-bottom:1px solid rgba(251,246,236,.16);
}
.site-foot__brand{display:flex;flex-direction:column;align-items:flex-start;gap:16px}
.site-foot__summary{margin:0;max-width:38ch;font-size:15px;line-height:1.85;color:rgba(251,246,236,.72)}
.site-foot__batch{
  margin:0;padding-left:12px;border-left:3px solid var(--red-bright);
  font-family:var(--mono);font-size:13px;letter-spacing:.1em;color:var(--sand);
}
.site-foot__batch b{color:var(--warm)}
.site-foot__nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px}
.foot-col__title{
  margin:0 0 16px;font-family:var(--mono);font-size:13px;
  font-weight:700;letter-spacing:.12em;color:var(--sand);text-transform:uppercase;
}
.foot-col__list{display:grid;gap:10px;margin:0;padding:0;list-style:none}
.foot-col__list a{
  position:relative;display:inline-block;padding-left:16px;
  font-size:15px;color:rgba(251,246,236,.82);text-decoration:none;
  transition:color .16s ease;
}
.foot-col__list a::before{
  content:"";position:absolute;left:0;top:.78em;
  width:8px;height:2px;background:var(--red-bright);
  transition:background-color .16s ease;
}
.foot-col__list a:hover{color:var(--green)}
.foot-col__list a:hover::before{background:var(--green)}
.site-foot__meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 28px;padding-top:26px;
  font-family:var(--mono);font-size:12.5px;letter-spacing:.04em;color:rgba(251,246,236,.6);
}
.site-foot__meta p{margin:0;max-width:none}
.site-foot__copy{color:rgba(251,246,236,.78)}
.to-top{
  appearance:none;margin-left:auto;cursor:pointer;
  background:transparent;border:2px solid var(--sand);color:var(--sand);
  font-family:var(--mono);font-size:12.5px;letter-spacing:.08em;padding:8px 14px;
  transition:background-color .16s ease,color .16s ease;
}
.to-top:hover{background:var(--sand);color:var(--ink)}
@media (max-width:900px){
  .site-foot__top{grid-template-columns:1fr;gap:34px}
  .site-foot__nav{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:520px){
  .site-foot{padding:48px 0 24px}
  .site-foot__inner{padding:0 16px}
  .site-foot__nav{grid-template-columns:1fr}
  .to-top{margin-left:0}
}

/* ---------- 13. 降级 ---------- */
@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.has-js [data-reveal]{opacity:1;transform:none}
  .card:hover,.card:focus-within,.btn:hover{transform:none}
  .is-flash{animation:none;outline:2px solid var(--green);outline-offset:4px}
}