/* ==========================================================================
   加拿大28PC · 北境数字驿站  共享样式表  /assets/site.css
   暗夜石墨基底 · 深枫木棕导航 · 枫叶红焦点 · 草原青功能引导 · 暖沙金数据高亮
   ========================================================================== */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,figcaption,blockquote,dl,dt,dd{margin:0;padding:0}
ul,ol{list-style:none}
img,svg,video{display:block;max-width:100%;height:auto}
button,input,select,textarea{font:inherit;color:inherit;background:none;border:0}
button{cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
[hidden]{display:none !important}
::selection{background:var(--red);color:#fff}

/* ---------- 2. Tokens ---------- */
:root{
  --graphite:#14171C;
  --graphite-soft:#1B2027;
  --snow:#F5F3EF;
  --maple:#3A241C;
  --maple-soft:#4B2F23;
  --red:#C4342A;
  --red-deep:#A82A21;
  --teal:#2E7D74;
  --gold:#D9A94C;
  --night:#123B3A;
  --ice:#C9D4DC;
  --mist:#8A9099;
  --sand:#EDE4D6;

  --ink:#14171C;
  --ink-soft:#3A4048;
  --paper:#F5F3EF;
  --card:#FFFFFF;
  --line:rgba(20,23,28,.14);
  --line-soft:rgba(20,23,28,.08);
  --line-light:rgba(201,212,220,.20);

  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --shell:1360px;
  --gutter:clamp(18px,3vw,44px);
  --rail:240px;

  --radius-s:8px;
  --radius-m:16px;
  --radius-l:28px;
  --shadow-1:0 1px 0 rgba(20,23,28,.05),0 18px 40px -30px rgba(20,23,28,.55);
  --shadow-2:0 24px 60px -40px rgba(20,23,28,.75);

  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:240ms;
}

/* ---------- 3. 基础排版（中文） ---------- */
body{
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.85;
  font-weight:400;
  color:var(--ink);
  background-color:var(--paper);
  background-image:
    radial-gradient(1100px 520px at 92% -8%,rgba(217,169,76,.13),transparent 62%),
    radial-gradient(880px 460px at -8% 6%,rgba(46,125,116,.10),transparent 60%);
  background-repeat:no-repeat;
  min-width:320px;
  overflow-x:hidden;
}
h1,h2,h3,h4{font-weight:900;line-height:1.16;letter-spacing:-.02em;color:inherit}
h1{font-size:clamp(38px,5.4vw,76px)}
h2{font-size:clamp(28px,3.6vw,46px)}
h3{font-size:clamp(20px,2.2vw,27px)}
h4{font-size:18px;letter-spacing:0}
p{text-wrap:pretty}
strong{font-weight:900}
code,kbd,samp,.mono{font-family:var(--font-mono)}

.skip-link{
  position:absolute;top:-100px;left:var(--gutter);z-index:200;
  display:inline-flex;align-items:center;min-height:44px;padding:10px 20px;
  background:var(--red);color:#fff;font-size:15px;font-weight:700;
  border-radius:0 0 var(--radius-s) var(--radius-s);
  transition:top var(--dur) var(--ease);
}
.skip-link:focus{top:0}

:where(a,button,summary,[tabindex]):focus-visible{
  outline:2px solid var(--gold);
  outline-offset:2px;
  border-radius:4px;
}

.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ---------- 4. 布局容器 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.grid{display:grid;gap:clamp(16px,2vw,28px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--aside{grid-template-columns:var(--rail) minmax(0,1fr);align-items:start}

.section{padding-block:clamp(52px,7vw,104px)}
.section--tight{padding-block:clamp(30px,4vw,60px)}
.section--sand{background:var(--sand);color:var(--maple)}
.section--night{background:var(--night);color:var(--snow)}
.section--dark{background:var(--graphite);color:var(--snow)}
.section--dark .section-note,.section--night .section-note{color:var(--ice)}
.section--dark a:not(.btn),.section--night a:not(.btn){color:var(--snow)}

.section-head{display:grid;gap:14px;margin-bottom:clamp(26px,3.4vw,52px);max-width:44em}
.section-no{
  font-family:var(--font-mono);font-size:13px;letter-spacing:.30em;
  text-transform:uppercase;color:var(--red);
}
.section--dark .section-no,.section--night .section-no{color:var(--gold)}
.section-title{font-size:clamp(30px,4.4vw,58px);font-weight:900}
.section-note{font-size:13px;letter-spacing:.06em;color:var(--mist);line-height:1.7}

.annotation{font-size:13px;letter-spacing:.18em;color:var(--mist)}
.annotation--vertical{
  writing-mode:vertical-rl;
  text-orientation:mixed;
  letter-spacing:.32em;
  font-family:var(--font-mono);
}

.prose{max-width:36em}
.prose p + p{margin-top:1.05em}
.prose h2,.prose h3{margin-top:1.6em;margin-bottom:.5em}
.prose ul,.prose ol{margin-top:.8em;padding-left:1.2em}
.prose ul li{list-style:none;position:relative}
.prose ul li::before{content:"";position:absolute;left:-1em;top:.85em;width:8px;height:2px;background:var(--red)}
.prose ol{list-style:decimal}
.prose ol li{margin-left:.2em;padding-left:.2em}
.lead{font-size:clamp(17px,1.5vw,21px);line-height:1.8;color:var(--ink-soft);max-width:34em}
.section--dark .lead,.section--night .lead{color:rgba(245,243,239,.82)}

/* ---------- 5. 按钮 / 标签 / 卡片 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  min-height:44px;padding:11px 24px;border-radius:999px;
  font-size:15px;font-weight:700;letter-spacing:.02em;line-height:1.2;
  border:1px solid transparent;
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),
             border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.btn--primary{background:var(--red);color:#fff;box-shadow:0 14px 30px -20px rgba(196,52,42,.95)}
.btn--primary:hover{background:var(--red-deep);transform:translateY(-1px)}
.btn--ghost{border-color:var(--ice);color:var(--ink);background:transparent}
.btn--ghost:hover{border-color:var(--teal);color:var(--teal)}
.btn--light{border-color:rgba(245,243,239,.42);color:var(--snow)}
.btn--light:hover{background:rgba(245,243,239,.12);border-color:var(--gold)}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;line-height:1;
  padding:6px 10px;border-radius:6px;
  background:var(--sand);color:var(--maple);
  border:1px solid rgba(58,36,28,.14);
}
.tag--red{background:rgba(196,52,42,.10);color:var(--red);border-color:rgba(196,52,42,.26)}
.tag--teal{background:rgba(46,125,116,.12);color:var(--teal);border-color:rgba(46,125,116,.28)}
.tag--gold{background:rgba(217,169,76,.18);color:#8A6415;border-color:rgba(217,169,76,.45)}

.chip{
  display:inline-flex;align-items:center;gap:8px;
  min-height:44px;padding:9px 18px;border-radius:999px;
  font-size:15px;font-weight:700;
  background:#fff;color:var(--ink);border:1px solid var(--line);
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.chip:hover{border-color:var(--teal);color:var(--teal)}
.chip[aria-pressed="true"]{background:var(--graphite);color:var(--snow);border-color:var(--graphite)}

.card{
  position:relative;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-m);
  padding:clamp(18px,2.4vw,30px);
  box-shadow:var(--shadow-1);
}
.card--sand{background:var(--sand);border-color:rgba(58,36,28,.14);color:var(--maple)}
.card--dark{background:var(--graphite);border-color:var(--line-light);color:var(--snow)}
.card--night{background:var(--night);border-color:var(--line-light);color:var(--snow)}
.card--dark .tag,.card--night .tag{background:rgba(245,243,239,.10);color:var(--snow);border-color:rgba(245,243,239,.22)}

/* ---------- 6. 图片容器（供页面阶段放置图片） ---------- */
.media-frame{
  position:relative;isolation:isolate;overflow:hidden;
  width:100%;aspect-ratio:16/10;
  border-radius:var(--radius-m);
  border:1px solid var(--line-light);
  background:
    radial-gradient(120% 90% at 82% 8%,rgba(196,52,42,.30),transparent 62%),
    linear-gradient(145deg,var(--graphite) 0%,var(--night) 58%,var(--maple) 100%);
}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    repeating-linear-gradient(90deg,rgba(201,212,220,.14) 0 1px,transparent 1px 72px),
    repeating-linear-gradient(0deg,rgba(201,212,220,.10) 0 1px,transparent 1px 72px);
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}
.media-frame__caption{
  position:absolute;left:0;right:0;bottom:0;z-index:2;
  padding:14px 18px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;
  color:var(--snow);
  background:linear-gradient(180deg,rgba(20,23,28,0),rgba(20,23,28,.86));
}

/* ---------- 7. 面包屑 ---------- */
.crumbs{padding-block:20px 0}
.crumbs__list{display:flex;flex-wrap:wrap;gap:6px;font-family:var(--font-mono);font-size:13px;color:var(--mist)}
.crumbs__list li{display:flex;align-items:center;gap:6px}
.crumbs__list li + li::before{content:"/";color:var(--ice)}
.crumbs__list a{color:var(--ink-soft)}
.crumbs__list a:hover{color:var(--teal)}
.crumbs__list [aria-current="page"]{color:var(--red)}

/* ---------- 8. 标签页 / 分段控件（页面阶段同级内容） ---------- */
.tabs{
  display:flex;flex-wrap:wrap;gap:8px;
  padding-bottom:12px;margin-bottom:24px;
  border-bottom:1px solid var(--line);
}
.tabs__tab{
  min-height:44px;padding:10px 20px;border-radius:999px;
  font-size:15px;font-weight:700;color:var(--mist);
  border:1px solid transparent;
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.tabs__tab:hover{color:var(--ink);border-color:var(--ice)}
.tabs__tab[aria-selected="true"]{background:var(--graphite);color:var(--snow);border-color:var(--graphite)}
.tabs__panel{padding-top:6px}
.section--dark .tabs,.section--night .tabs{border-color:var(--line-light)}
.section--dark .tabs__tab,.section--night .tabs__tab{color:var(--ice)}
.section--dark .tabs__tab[aria-selected="true"],.section--night .tabs__tab[aria-selected="true"]{background:var(--red);border-color:var(--red);color:#fff}

/* 时段对照版本面板协议 */
[data-slot-panel]{display:block}
html:not([data-slot-version="b"]) [data-slot-panel="b"]{display:none}
html[data-slot-version="b"] [data-slot-panel="a"]{display:none}

/* 滚动显现 */
html.js [data-reveal]{opacity:0;transform:translateY(16px)}
html.js [data-reveal].is-visible{
  opacity:1;transform:none;
  transition:opacity 420ms var(--ease),transform 420ms var(--ease);
}

/* ---------- 9. 页头 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--graphite);
  color:var(--snow);
  border-bottom:1px solid rgba(201,212,220,.14);
}

/* 上层：品牌说明 + 检索入口 + 时段对照开关 */
.site-header__sky{
  background-color:var(--graphite);
  background-image:
    radial-gradient(520px 220px at 88% -40%,rgba(217,169,76,.20),transparent 70%),
    radial-gradient(420px 200px at 62% -60%,rgba(196,52,42,.20),transparent 72%),
    repeating-linear-gradient(90deg,rgba(201,212,220,.085) 0 1px,transparent 1px 104px),
    repeating-linear-gradient(0deg,rgba(201,212,220,.055) 0 1px,transparent 1px 104px);
}
.site-header__sky-inner{
  display:flex;align-items:center;gap:clamp(14px,2.6vw,40px);
  padding-block:13px;
}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.brand__seal{
  display:grid;place-items:center;flex:0 0 auto;
  width:44px;height:44px;border-radius:12px;
  background:var(--red);color:#fff;
  font-family:var(--font-mono);font-weight:700;font-size:16px;letter-spacing:-.02em;
  box-shadow:inset 0 0 0 1px rgba(245,243,239,.30),0 10px 22px -14px rgba(196,52,42,.9);
}
.brand__lines{display:grid;gap:1px}
.brand__name{font-size:19px;font-weight:900;letter-spacing:-.01em;line-height:1.25}
.brand__line{font-family:var(--font-mono);font-size:11px;letter-spacing:.26em;color:var(--gold);line-height:1.5}

.site-header__tagline{
  flex:1 1 auto;min-width:0;
  font-size:13px;line-height:1.6;color:var(--ice);
  padding-left:18px;border-left:1px solid rgba(201,212,220,.26);
}

.utility{display:flex;align-items:center;gap:12px;margin-left:auto;flex:0 0 auto}
.utility__search{
  display:inline-flex;align-items:center;gap:10px;
  min-height:44px;padding:8px 18px;border-radius:999px;
  font-size:14px;font-weight:700;letter-spacing:.02em;
  color:var(--snow);
  border:1px solid rgba(201,212,220,.30);
  background:rgba(245,243,239,.05);
  transition:border-color var(--dur) var(--ease),background-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.utility__search:hover{border-color:var(--teal);background:rgba(46,125,116,.22);color:#fff}
.utility__key{
  display:grid;place-items:center;width:20px;height:20px;border-radius:5px;
  font-family:var(--font-mono);font-size:12px;line-height:1;
  background:rgba(217,169,76,.22);color:var(--gold);
}

.switch{
  display:flex;align-items:center;gap:4px;
  padding:4px;border-radius:999px;
  background:rgba(245,243,239,.07);
  border:1px solid rgba(201,212,220,.20);
}
.switch__label{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;
  color:var(--ice);padding:0 8px;
}
.switch__btn{
  min-height:36px;padding:6px 14px;border-radius:999px;
  font-family:var(--font-mono);font-size:12px;font-weight:700;letter-spacing:.06em;
  color:var(--ice);
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.switch__btn:hover{color:#fff;background:rgba(245,243,239,.12)}
.switch__btn[aria-pressed="true"]{background:var(--gold);color:var(--maple)}

/* 下层：六个主要栏目 */
.site-header__rail{background:var(--maple);border-top:1px solid rgba(201,212,220,.10)}
.site-header__rail-inner{position:relative;display:flex;align-items:stretch;gap:16px}
.primary-nav{flex:1 1 auto;min-width:0}
.primary-nav__list{display:flex;flex-wrap:wrap;gap:2px;counter-reset:nav}
.primary-nav__list > li{counter-increment:nav;display:flex}
.primary-nav__list a{
  position:relative;display:flex;align-items:center;gap:9px;
  min-height:48px;padding:0 18px;
  font-size:15px;font-weight:700;letter-spacing:.03em;
  color:rgba(245,243,239,.80);
  transition:color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.primary-nav__list a::before{
  content:counter(nav,decimal-leading-zero);
  font-family:var(--font-mono);font-size:11px;letter-spacing:0;
  color:var(--gold);opacity:.72;
}
.primary-nav__list a:hover{color:#fff;background:rgba(196,52,42,.18)}
.primary-nav__list a[aria-current="page"]{
  color:#fff;
  background:linear-gradient(180deg,rgba(196,52,42,.34),rgba(196,52,42,.06));
  box-shadow:inset 0 -3px 0 var(--red);
}
.primary-nav__list a[aria-current="page"]::before{color:var(--snow);opacity:1}

.nav-toggle{
  display:none;align-items:center;gap:10px;margin-left:auto;
  min-height:44px;padding:0 16px;border-radius:999px;
  font-size:14px;font-weight:700;color:var(--snow);
  border:1px solid rgba(245,243,239,.30);
}
.nav-toggle:hover{border-color:var(--gold);color:var(--gold)}
.nav-toggle__bars{position:relative;display:block;width:18px;height:2px;border-radius:2px;background:currentColor}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:18px;height:2px;border-radius:2px;background:currentColor;
  transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease);
}
.nav-toggle__bars::before{top:-6px}
.nav-toggle__bars::after{top:6px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-6px) rotate(-45deg)}

.scroll-progress{
  position:absolute;left:0;bottom:-1px;width:100%;height:3px;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--red),var(--gold) 55%,var(--teal));
  pointer-events:none;
}

/* ---------- 10. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,7vw,110px);
  background-color:var(--maple);
  background-image:
    radial-gradient(680px 300px at 6% 0%,rgba(196,52,42,.26),transparent 68%),
    radial-gradient(560px 260px at 96% 10%,rgba(46,125,116,.22),transparent 70%);
  color:rgba(245,243,239,.86);
}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(90deg,rgba(201,212,220,.07) 0 1px,transparent 1px 120px);
}
.site-footer__inner{
  position:relative;
  display:grid;
  grid-template-columns:minmax(230px,1.1fr) minmax(0,2fr) minmax(250px,1.3fr);
  gap:clamp(24px,3vw,54px);
  padding-block:clamp(44px,5vw,72px) clamp(34px,4vw,56px);
}
.site-footer__brand{display:grid;align-content:start;gap:8px}
.footer-seal{
  display:grid;place-items:center;
  width:46px;height:46px;border-radius:12px;
  background:var(--red);color:#fff;
  font-family:var(--font-mono);font-weight:700;font-size:16px;
  box-shadow:inset 0 0 0 1px rgba(245,243,239,.28);
}
.footer-brand__name{font-size:20px;font-weight:900;color:var(--snow);letter-spacing:-.01em}
.footer-brand__line{font-family:var(--font-mono);font-size:11px;letter-spacing:.26em;color:var(--gold)}
.footer-brand__desc{margin-top:6px;font-size:14px;line-height:1.8;color:rgba(245,243,239,.68);max-width:26em}

.footer-nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(18px,2.4vw,34px)}
.footer-nav__col{display:grid;align-content:start;gap:14px}
.footer-nav__title{
  font-family:var(--font-mono);font-size:12px;font-weight:700;
  letter-spacing:.20em;color:var(--gold);
}
.footer-nav__list{display:grid;gap:2px}
.footer-nav__list a{
  display:inline-flex;align-items:center;min-height:44px;
  font-size:15px;color:rgba(245,243,239,.78);
  transition:color var(--dur) var(--ease);
}
.footer-nav__list a:hover{color:#fff;text-decoration:underline;text-decoration-color:var(--red);text-underline-offset:5px;text-decoration-thickness:2px}

.site-footer__contact{display:grid;align-content:start;gap:10px}
.contact-line{
  display:grid;grid-template-columns:auto 1fr;gap:10px;align-items:baseline;
  font-family:var(--font-mono);font-size:13px;line-height:1.7;
  color:rgba(245,243,239,.88);word-break:break-word;
}
.contact-line__key{color:var(--gold);letter-spacing:.14em;font-size:11px}
.site-footer__note{
  margin-top:4px;font-size:13px;line-height:1.8;
  color:rgba(245,243,239,.60);
  padding-left:14px;border-left:2px solid rgba(196,52,42,.7);
}
.site-footer__bar{position:relative;background:var(--graphite);border-top:1px solid rgba(201,212,220,.14)}
.site-footer__bar-inner{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;
  padding-block:16px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.05em;
  color:var(--ice);
}
.site-footer__legal{color:rgba(201,212,220,.86)}
.site-footer__hint{color:var(--gold)}

/* ---------- 11. 响应式 ---------- */
@media (max-width:1180px){
  .site-header__tagline{display:none}
  .site-footer__inner{grid-template-columns:minmax(0,1fr) minmax(0,1.6fr)}
  .site-footer__contact{grid-column:1 / -1}
  .site-footer__note{max-width:52em}
}
@media (max-width:1024px){
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--aside{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:900px){
  .nav-toggle{display:inline-flex}
  .primary-nav{flex:1 1 auto}
  .primary-nav__list{
    position:absolute;left:calc(var(--gutter) * -1);right:calc(var(--gutter) * -1);top:100%;
    z-index:70;
    flex-direction:column;flex-wrap:nowrap;gap:0;
    background:var(--maple-soft);
    border-top:1px solid rgba(201,212,220,.16);
    box-shadow:var(--shadow-2);
    max-height:0;overflow:hidden;visibility:hidden;
    transition:max-height var(--dur) var(--ease),visibility var(--dur) var(--ease);
  }
  [data-nav][data-open] .primary-nav__list{
    max-height:76vh;overflow-y:auto;visibility:visible;
  }
  .primary-nav__list > li{display:block}
  .primary-nav__list a{
    min-height:52px;padding:0 20px;
    border-bottom:1px solid rgba(201,212,220,.12);
    font-size:16px;
  }
  .primary-nav__list a[aria-current="page"]{box-shadow:inset 3px 0 0 var(--red)}
  .site-footer__inner{grid-template-columns:minmax(0,1fr);gap:32px}
  .footer-nav{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:640px){
  body{font-size:16px;line-height:1.8}
  .site-header__sky-inner{padding-block:11px;gap:12px}
  .brand__seal{width:38px;height:38px;font-size:14px}
  .brand__name{font-size:17px}
  .brand__line{display:none}
  .utility{gap:8px}
  .utility__search{padding:8px 14px;font-size:13px}
  .utility__key{display:none}
  .switch__label{display:none}
  .switch__btn{padding:6px 12px}
  .grid--2{grid-template-columns:minmax(0,1fr)}
  .footer-nav{grid-template-columns:minmax(0,1fr);gap:22px}
  .site-footer__bar-inner{flex-direction:column;align-items:flex-start}
}

/* ---------- 12. 动效降级 ---------- */
@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.js [data-reveal]{opacity:1 !important;transform:none !important}
  .scroll-progress{transition:none}
}