/* ===== 1. 设计令牌 ===== */
:root{
  --canal-deep:#0A1B26;
  --canal-green:#11312E;
  --slate-blue:#1C3B47;
  --paper:#F5F1E6;
  --gold:#C9A227;
  --champagne:#EBD9AC;
  --coral:#FF6B4A;
  --aqua:#4FB3AA;
  --night-purple:#2E2A4A;
  --ink:#0B1218;

  --font-display:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,"Times New Roman",serif;
  --font-body:"Inter","Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"IBM Plex Mono","SFMono-Regular",ui-monospace,Consolas,"Courier New",monospace;

  --step-0:clamp(15px,1.02vw,17px);
  --step-1:clamp(18px,1.4vw,21px);
  --step-2:clamp(23px,2.1vw,29px);
  --step-3:clamp(28px,3.2vw,42px);
  --step-4:clamp(2.2rem,5vw,4.2rem);

  --gutter:clamp(16px,4vw,48px);
  --header-h:84px;
  --radius-arch:clamp(26px,4vw,56px);
  --line:rgba(235,217,172,.18);
  --line-soft:rgba(235,217,172,.1);
  --line-strong:rgba(201,162,39,.45);
  --shadow-deep:0 30px 60px -42px rgba(0,0,0,.95);
  --ease:cubic-bezier(.32,.72,.28,1);
}

@media (max-width:640px){
  :root{--header-h:68px}
}

/* ===== 2. Reset 与基础 ===== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-block-start:calc(var(--header-h) + 14px)}
body{
  margin:0;
  background:var(--canal-deep);
  color:rgba(245,241,230,.92);
  font-family:var(--font-body);
  font-size:var(--step-0);
  font-weight:400;
  line-height:1.78;
  letter-spacing:.012em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img,svg,video{max-width:100%;height:auto}
ul,ol{margin:0;padding:0}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
a{color:var(--aqua);text-decoration-color:rgba(79,179,170,.4);text-underline-offset:.22em;transition:color .24s var(--ease),text-decoration-color .24s var(--ease)}
a:hover{color:var(--champagne)}
button{font-family:inherit}
::selection{background:var(--gold);color:var(--canal-deep)}
:focus-visible{outline:2px solid var(--aqua);outline-offset:3px;border-radius:2px}
#main-content{scroll-margin-block-start:var(--header-h)}

/* ===== 3. 中文排版 ===== */
h1,h2,h3,h4{
  margin:0 0 .5em;
  font-family:var(--font-display);
  font-weight:700;
  line-height:1.22;
  letter-spacing:-.01em;
  color:var(--paper);
  text-wrap:balance;
}
h1{font-size:var(--step-4)}
h2{font-size:var(--step-3)}
h3{font-size:var(--step-2)}
h4{font-size:var(--step-1)}
strong,b{font-weight:600;color:var(--champagne)}
small{font-size:.8em}
.mono{font-family:var(--font-mono);font-size:.92em;letter-spacing:.04em;font-variant-numeric:tabular-nums}
.num{font-family:var(--font-mono);font-size:.74rem;letter-spacing:.1em;color:var(--gold)}
.eyebrow{
  display:inline-flex;align-items:center;gap:.7em;
  font-family:var(--font-mono);font-size:.7rem;font-weight:600;
  letter-spacing:.22em;text-transform:uppercase;color:var(--gold);
  margin:0 0 1rem;
}
.eyebrow::before{content:"";display:block;width:clamp(18px,3vw,34px);height:1px;background:linear-gradient(90deg,var(--gold),transparent)}
.section-title{font-size:var(--step-3);margin:0 0 .5em}
.lede{max-width:62ch;font-size:var(--step-1);line-height:1.7;color:rgba(245,241,230,.84);margin:0 0 1.2em}
.prose{max-width:68ch}
.prose p{margin:0 0 1.15em}
.prose h3{margin-top:1.6em}

/* ===== 4. 容器与分区 ===== */
.container{width:100%;max-width:1320px;margin-inline:auto;padding-inline:var(--gutter)}
.container--narrow{max-width:960px}
.container--text{max-width:760px}
.section{padding-block:clamp(40px,6vw,88px)}
.section--tight{padding-block:clamp(26px,4vw,52px)}
.section--green{background:linear-gradient(180deg,var(--canal-green),rgba(17,49,46,.72))}
.section--slate{background:linear-gradient(180deg,var(--slate-blue),rgba(28,59,71,.6))}
.section--paper{background:var(--paper);color:var(--ink)}
.section--paper :is(h1,h2,h3,h4){color:var(--ink)}
.section--paper .lede,.section--paper .prose p{color:rgba(11,18,24,.82)}
.section--paper .eyebrow{color:#8a6d10}
.section--paper a{color:#175a54;text-decoration-color:rgba(23,90,84,.4)}
.section--paper a:hover{color:var(--ink)}
.site-main{display:block;padding-block-start:var(--header-h)}
.site-main--flush{padding-block-start:0}
.water-rule{
  border:0;height:1px;margin-block:clamp(22px,3.5vw,40px);
  background:repeating-linear-gradient(90deg,var(--line-strong) 0 18px,transparent 18px 32px);
  opacity:.75;
}
.grid{display:grid;gap:clamp(16px,2.4vw,32px)}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(238px,1fr))}

/* ===== 5. 通用控件 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.55em;
  min-height:46px;padding:.72em 1.45em;
  border:1px solid transparent;border-radius:999px;
  font-family:var(--font-body);font-size:.92rem;font-weight:600;letter-spacing:.04em;
  text-decoration:none;cursor:pointer;
  transition:background-color .24s var(--ease),color .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.btn--primary{background:var(--gold);color:var(--canal-deep);border-color:var(--gold)}
.btn--primary:hover{background:var(--champagne);border-color:var(--champagne);color:var(--canal-deep);box-shadow:0 0 0 1px var(--champagne),0 0 0 7px rgba(201,162,39,.16)}
.btn--ghost{background:transparent;color:var(--champagne);border-color:rgba(235,217,172,.45)}
.btn--ghost:hover{color:var(--paper);border-color:var(--gold);box-shadow:0 0 0 1px var(--gold),0 0 0 7px rgba(79,179,170,.14)}
.btn--sm{min-height:38px;padding:.5em 1.1em;font-size:.82rem}

.tag{
  display:inline-flex;align-items:center;gap:.45em;
  padding:.28em .72em;border:1px solid currentColor;border-radius:999px;
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.12em;
  color:var(--champagne);background:rgba(235,217,172,.06);
}
.tag--coral{color:var(--coral);background:rgba(255,107,74,.1)}
.tag--gold{color:var(--gold);background:rgba(201,162,39,.1)}
.tag--aqua{color:var(--aqua);background:rgba(79,179,170,.1)}

.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:.5rem;
  padding-block:clamp(14px,2vw,22px);
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.08em;
  color:rgba(245,241,230,.55);
}
.crumbs__link{color:rgba(245,241,230,.74);text-decoration:none;border-block-end:1px solid transparent;transition:color .22s var(--ease),border-color .22s var(--ease)}
.crumbs__link:hover{color:var(--champagne);border-block-end-color:var(--gold)}
.crumbs__sep{color:rgba(201,162,39,.6)}
.crumbs__current{color:var(--champagne)}
.section--paper .crumbs{color:rgba(11,18,24,.56)}
.section--paper .crumbs__link{color:rgba(11,18,24,.72)}
.section--paper .crumbs__current{color:var(--ink)}

.arch-card{
  position:relative;
  padding:clamp(20px,3vw,34px);
  border:1px solid var(--line);
  border-radius:var(--radius-arch) var(--radius-arch) 8px 8px;
  background:linear-gradient(165deg,var(--slate-blue),rgba(46,42,74,.72));
  box-shadow:var(--shadow-deep);
  transition:border-color .28s var(--ease),box-shadow .28s var(--ease);
}
.arch-card:hover{border-color:rgba(201,162,39,.55)}
.arch-card--paper{background:var(--paper);color:var(--ink);border-color:rgba(11,18,24,.12)}
.arch-card--paper :is(h2,h3,h4){color:var(--ink)}
.arch-card__head{margin:0 0 .8rem}
.arch-card__body{font-size:.96rem;color:rgba(245,241,230,.8)}
.arch-card--paper .arch-card__body{color:rgba(11,18,24,.78)}

/* 航道式栏目布局 */
.lane{display:grid;grid-template-columns:minmax(0,3fr) minmax(0,9fr);gap:clamp(22px,4vw,56px);align-items:start}
.lane__rail{
  position:sticky;inset-block-start:calc(var(--header-h) + 20px);
  padding-inline-start:clamp(12px,1.6vw,20px);
  border-inline-start:1px solid var(--line-strong);
}
.rail-title{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.2em;color:var(--gold);margin:0 0 .9rem}
.rail-list{list-style:none;display:grid;gap:.55rem}
.rail-link{display:flex;gap:.6rem;font-size:.86rem;color:rgba(245,241,230,.7);text-decoration:none;transition:color .22s var(--ease)}
.rail-link:hover,.rail-link[aria-current="true"]{color:var(--champagne)}
.rail-num{font-family:var(--font-mono);font-size:.66rem;letter-spacing:.06em;color:var(--aqua)}
.lane__main{min-width:0}

/* 折叠索引 */
.fold{border-block-end:1px solid var(--line)}
.fold:first-of-type{border-block-start:1px solid var(--line)}
.fold__head{
  display:flex;align-items:baseline;gap:clamp(10px,2vw,20px);
  width:100%;padding:clamp(14px,2vw,20px) 0;
  background:none;border:0;color:inherit;font:inherit;text-align:start;cursor:pointer;
  transition:color .22s var(--ease);
}
.fold__head:hover{color:var(--champagne)}
.fold__index{flex:0 0 auto;min-width:3.2em;font-family:var(--font-mono);font-size:.72rem;letter-spacing:.08em;color:var(--gold)}
.fold__title{flex:1 1 auto;font-family:var(--font-display);font-size:var(--step-1);font-weight:700;line-height:1.42}
.fold__sign{position:relative;flex:0 0 auto;width:13px;height:13px;margin-block-start:.45em}
.fold__sign::before,.fold__sign::after{content:"";position:absolute;inset-inline:0;inset-block-start:50%;height:1px;background:var(--gold);transition:transform .28s var(--ease)}
.fold__sign::after{transform:rotate(90deg)}
.fold__head[aria-expanded="true"] .fold__sign::after{transform:rotate(0deg) scaleX(0)}
.fold__body{display:grid;grid-template-rows:0fr;transition:grid-template-rows .34s var(--ease)}
.fold__body[data-open]{grid-template-rows:1fr}
.fold__inner{overflow:hidden;min-height:0}
.fold__content{padding-block:0 clamp(14px,2vw,22px);max-width:64ch;color:rgba(245,241,230,.8)}
.section--paper .fold{border-color:rgba(11,18,24,.14)}
.section--paper .fold__content{color:rgba(11,18,24,.8)}
.section--paper .fold__index{color:#8a6d10}

/* 图像容器基础规则（页面阶段放置占位） */
.media-frame{
  position:relative;display:block;overflow:hidden;margin:0;
  aspect-ratio:4/3;
  border:1px solid var(--line);
  border-radius:var(--radius-arch) var(--radius-arch) 6px 6px;
  background:linear-gradient(155deg,var(--slate-blue) 0%,var(--night-purple) 55%,var(--canal-green) 100%);
  box-shadow:var(--shadow-deep);
}
.media-frame > img,.media-frame > video,.media-frame > svg,.media-frame__fill{display:block;width:100%;height:100%;object-fit:cover}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(190deg,rgba(79,179,170,.14),transparent 46%,rgba(10,27,38,.52));
}
.media-frame--wide{aspect-ratio:16/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}
.media-caption{margin-block-start:.7rem;font-family:var(--font-mono);font-size:.72rem;letter-spacing:.06em;color:rgba(245,241,230,.55)}

/* 进入视口浮现 */
[data-reveal]{opacity:0;transform:translateY(10px);transition:opacity .42s var(--ease),transform .42s var(--ease)}
[data-reveal].is-visible{opacity:1;transform:none}

/* ===== 6. 头部 ===== */
.skip-link{
  position:fixed;inset-block-start:-120px;inset-inline-start:clamp(12px,3vw,32px);z-index:200;
  padding:.7rem 1.2rem;border-radius:0 0 10px 10px;
  background:var(--paper);color:var(--ink);font-weight:600;text-decoration:none;
  transition:inset-block-start .22s var(--ease);
}
.skip-link:focus{inset-block-start:0;color:var(--ink)}

.site-header{
  position:fixed;inset-block-start:0;inset-inline:0;z-index:100;
  color:var(--paper);
  background:linear-gradient(180deg,rgba(10,27,38,.92) 0%,rgba(10,27,38,.55) 62%,rgba(10,27,38,0) 100%);
  border-block-end:1px solid transparent;
  transition:background-color .3s var(--ease),border-color .3s var(--ease),box-shadow .3s var(--ease),backdrop-filter .3s var(--ease);
}
.site-header[data-scrolled]{
  background:rgba(17,49,46,.97);
  border-block-end-color:rgba(201,162,39,.42);
  box-shadow:0 22px 46px -34px rgba(0,0,0,.95);
  backdrop-filter:blur(9px);
}
.site-header__inner{
  width:100%;max-width:1320px;margin-inline:auto;
  padding-inline:var(--gutter);
  min-height:var(--header-h);
  display:flex;align-items:center;justify-content:space-between;
  gap:clamp(12px,2vw,30px);
  transition:min-height .3s var(--ease);
}
.site-header[data-scrolled] .site-header__inner{min-height:64px}

.brand{display:inline-flex;align-items:center;gap:.72rem;flex:0 0 auto;text-decoration:none;color:var(--paper)}
.brand:hover{color:var(--paper)}
.brand__mark{
  position:relative;display:block;flex:0 0 auto;width:32px;height:36px;
  border:1px solid var(--gold);border-radius:16px 16px 3px 3px;
  background:linear-gradient(180deg,rgba(201,162,39,.3),rgba(79,179,170,.12) 62%,rgba(10,27,38,.1));
  box-shadow:inset 0 0 0 1px rgba(10,27,38,.35);
}
.brand__mark::before{
  content:"";position:absolute;inset-block:7px 9px;inset-inline-start:50%;width:1px;
  background:rgba(235,217,172,.6);transform:translateX(-50%);
}
.brand__mark::after{
  content:"";position:absolute;inset-inline:5px;inset-block-end:4px;height:1px;
  background:linear-gradient(90deg,transparent,var(--aqua),transparent);
}
.brand__text{display:flex;flex-direction:column;line-height:1.24}
.brand__name{font-family:var(--font-display);font-size:1.14rem;font-weight:700;letter-spacing:.02em;color:var(--paper)}
.brand__line{font-family:var(--font-mono);font-size:.64rem;letter-spacing:.16em;color:rgba(245,241,230,.58)}

.site-nav{display:flex;align-items:center;gap:clamp(14px,2vw,32px);margin-inline-start:auto}
.site-nav__list{display:flex;align-items:center;gap:clamp(10px,1.6vw,26px);list-style:none}
.site-nav__item{flex:0 0 auto}
.site-nav__link{
  position:relative;display:inline-flex;align-items:baseline;gap:.45em;
  padding:.55em .1em;font-size:.92rem;font-weight:500;
  color:rgba(245,241,230,.82);text-decoration:none;
  transition:color .24s var(--ease);
}
.site-nav__num{font-family:var(--font-mono);font-size:.62rem;letter-spacing:.08em;color:var(--gold);opacity:.8}
.site-nav__link::after{
  content:"";position:absolute;inset-inline:0;inset-block-end:.12em;height:1px;
  background:linear-gradient(90deg,var(--gold),var(--aqua));
  transform:scaleX(0);transform-origin:left center;
  transition:transform .3s var(--ease);
}
.site-nav__link:hover,.site-nav__link:focus-visible{color:var(--champagne)}
.site-nav__link:hover::after,.site-nav__link:focus-visible::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{color:var(--champagne)}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1);background:var(--gold)}

.site-nav__utility{
  display:flex;flex-direction:column;gap:.18rem;
  padding-inline-start:clamp(12px,1.6vw,22px);
  border-inline-start:1px solid rgba(235,217,172,.22);
}
.utility-item{font-family:var(--font-mono);font-size:.64rem;letter-spacing:.1em;color:rgba(245,241,230,.6);white-space:nowrap}
.site-nav__cta{
  align-self:flex-start;margin-block-start:.35rem;
  font-family:var(--font-body);font-size:.72rem;font-weight:600;letter-spacing:.14em;
  color:var(--gold);text-decoration:none;
  border-block-end:1px solid rgba(201,162,39,.55);padding-block-end:.1rem;
  transition:color .24s var(--ease),border-color .24s var(--ease);
}
.site-nav__cta:hover{color:var(--champagne);border-block-end-color:var(--champagne)}

.nav-toggle{
  display:none;align-items:center;gap:.55rem;
  padding:.5rem .85rem;
  background:transparent;border:1px solid rgba(235,217,172,.4);border-radius:999px;
  color:var(--champagne);font-size:.78rem;letter-spacing:.14em;cursor:pointer;
  transition:background-color .24s var(--ease),border-color .24s var(--ease);
}
.nav-toggle:hover{background:rgba(201,162,39,.14);border-color:var(--gold)}
.nav-toggle__bars{position:relative;display:block;width:16px;height:10px}
.nav-toggle__bars::before,.nav-toggle__bars::after{
  content:"";position:absolute;inset-inline:0;height:1px;background:currentColor;
  transition:transform .3s var(--ease);
}
.nav-toggle__bars::before{inset-block-start:0}
.nav-toggle__bars::after{inset-block-end:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(4.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-4.5px) rotate(-45deg)}
.nav-toggle__label{line-height:1}

.site-header__rule{position:absolute;inset-inline:0;inset-block-end:0;height:1px;background:rgba(235,217,172,.12);overflow:hidden}
.site-header__meter{display:block;width:0;height:100%;background:linear-gradient(90deg,var(--gold),var(--aqua));transition:width .12s linear}

@media (min-width:1000px) and (max-width:1199px){
  .site-nav__utility{display:none}
}

@media (max-width:999px){
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;inset-inline:0;inset-block-start:100%;
    display:block;margin-inline-start:0;
    padding:clamp(16px,4vw,26px) var(--gutter) clamp(24px,5vw,34px);
    background:linear-gradient(180deg,rgba(17,49,46,.99),rgba(10,27,38,.99));
    border-block-start:1px solid rgba(201,162,39,.42);
    border-radius:0 0 26px 26px;
    box-shadow:0 34px 54px -32px #000;
    max-height:calc(100vh - var(--header-h));
    overflow-y:auto;
    clip-path:inset(0 0 100% 0);
    opacity:0;visibility:hidden;
    transition:clip-path .34s var(--ease),opacity .24s var(--ease),visibility .34s;
  }
  .site-nav[data-open]{clip-path:inset(0 0 0 0);opacity:1;visibility:visible}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .site-nav__item{border-block-end:1px solid rgba(235,217,172,.14)}
  .site-nav__item:first-child{border-block-start:1px solid rgba(235,217,172,.14)}
  .site-nav__link{display:flex;align-items:baseline;gap:.7em;padding:.95rem .15rem;font-size:1.02rem}
  .site-nav__link::after{inset-block-end:.55em}
  .site-nav__utility{
    flex-direction:row;flex-wrap:wrap;align-items:center;gap:.5rem 1.2rem;
    padding:1rem .15rem 0;border-inline-start:0;
  }
  .site-nav__cta{margin-block-start:0}
}

@media (max-width:520px){
  .brand__line{display:none}
  .brand__name{font-size:1.04rem}
}

/* ===== 7. 页脚 ===== */
.site-footer{
  position:relative;
  margin-block-start:clamp(48px,8vw,96px);
  padding-block:clamp(44px,6vw,76px) clamp(22px,3vw,34px);
  background:linear-gradient(180deg,var(--canal-green) 0%,rgba(10,27,38,.98) 82%);
  border-block-start:1px solid var(--line-strong);
  color:rgba(245,241,230,.76);
  overflow:hidden;
}
.site-footer__arcade{
  position:absolute;inset-block-start:0;inset-inline:0;
  height:clamp(22px,3.4vw,38px);
  background:radial-gradient(120% 100% at 50% 0,transparent 0 62%,rgba(201,162,39,.2) 62.5% 63.6%,transparent 64%) 0 0/116px 100% repeat-x;
  pointer-events:none;
  opacity:.85;
}
.site-footer__inner{
  position:relative;
  width:100%;max-width:1320px;margin-inline:auto;
  padding-inline:var(--gutter);
  display:grid;
  grid-template-columns:minmax(240px,1.5fr) repeat(3,minmax(140px,1fr));
  gap:clamp(26px,4vw,56px);
}
.footer-brand{display:flex;flex-direction:column;gap:.9rem}
.footer-brand__mark{display:inline-flex;align-items:center;gap:.7rem;text-decoration:none;color:var(--paper)}
.footer-brand__mark:hover{color:var(--paper)}
.footer-brand__name{font-family:var(--font-display);font-size:1.1rem;font-weight:700;letter-spacing:.02em}
.footer-brand__statement{max-width:34ch;margin:0;font-size:.92rem;line-height:1.72;color:rgba(245,241,230,.72)}
.footer-brand__region{
  display:inline-flex;align-items:center;gap:.55rem;margin:0;
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.18em;color:var(--champagne);
}
.footer-brand__dot{display:block;width:6px;height:6px;border-radius:50%;background:var(--coral);box-shadow:0 0 0 3px rgba(255,107,74,.16)}
.footer-col{min-width:0}
.footer-col__title{
  margin:0 0 .9rem;
  font-family:var(--font-mono);font-size:.68rem;font-weight:600;
  letter-spacing:.2em;color:var(--gold);
}
.footer-col__list{list-style:none;display:grid;gap:.6rem;font-size:.92rem}
.footer-link{
  color:rgba(245,241,230,.8);text-decoration:none;
  border-block-end:1px solid transparent;padding-block-end:.08rem;
  transition:color .22s var(--ease),border-color .22s var(--ease);
}
.footer-link:hover{color:var(--champagne);border-block-end-color:var(--aqua)}
.footer-text{color:rgba(245,241,230,.8);word-break:break-word;font-size:.86rem}
.footer-col__note{margin:.9rem 0 0;font-size:.8rem;line-height:1.66;color:rgba(245,241,230,.52)}
.site-footer__meta{
  position:relative;
  width:100%;max-width:1320px;margin-inline:auto;
  margin-block-start:clamp(30px,5vw,56px);
  padding:clamp(16px,2.4vw,24px) var(--gutter) 0;
  border-block-start:1px solid rgba(235,217,172,.16);
  display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;
  gap:.6rem 1.6rem;
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.06em;
  color:rgba(245,241,230,.52);
}
.site-footer__meta p{margin:0}
.site-footer__region{color:var(--champagne);letter-spacing:.18em}

@media (max-width:960px){
  .site-footer__inner{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:560px){
  .site-footer__inner{grid-template-columns:1fr;gap:clamp(22px,5vw,32px)}
  .site-footer__meta{justify-content:flex-start}
}

/* ===== 8. 降低动效偏好 ===== */
@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}
  .site-nav{transition:none}
}