/* ===== 米兰赛场 · 共享样式 /assets/site.css ===== */

:root{
  --red:#C8102E;
  --ink:#0B0D10;
  --deep:#15181E;
  --grey:#E8EBF0;
  --line:#B7BEC9;
  --blue:#2F6BFF;
  --ice:#DCE6FF;
  --paper:#F7F4EF;
  --yellow:#FFC53D;
  --green:#1F9D6A;
  --muted:#5D6470;

  --rail-w:88px;
  --wrap:1240px;
  --gutter:clamp(18px,4vw,44px);

  --font-head:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-cond:"Barlow Condensed","Noto Sans SC","PingFang SC",system-ui,sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace;

  --r-card:18px;
  --r-tag:6px;
  --r-shot:12px;
  --dur:120ms;
  --ease:cubic-bezier(.2,.7,.3,1);
  --shadow:0 14px 34px rgba(11,13,16,.10);
}

/* ---------- reset & base ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  padding-left:var(--rail-w);
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:17px;
  font-weight:400;
  line-height:1.75;
}
main{display:block}
#main-content{scroll-margin-top:140px}
img,svg,video{display:block;max-width:100%;height:auto}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
h1,h2,h3,h4{
  margin:0 0 .5em;
  font-family:var(--font-head);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.14;
  color:var(--ink);
}
h1{font-size:clamp(2.25rem,5vw,4.5rem)}
h2{font-size:clamp(1.75rem,3.4vw,2.75rem)}
h3{font-size:clamp(1.25rem,2.2vw,1.75rem);line-height:1.26}
a{
  color:var(--blue);
  text-decoration:none;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
button{
  font:inherit;
  color:inherit;
  background:none;
  border:0;
  padding:0;
  cursor:pointer;
}
:focus-visible{outline:2px solid var(--blue);outline-offset:3px}

/* ---------- 通用内容件 ---------- */
.wrap{
  width:100%;
  max-width:var(--wrap);
  margin-left:auto;
  margin-right:auto;
  padding-left:var(--gutter);
  padding-right:var(--gutter);
}
.section{padding-top:clamp(36px,6vw,80px);padding-bottom:clamp(36px,6vw,80px)}
.section--tight{padding-top:clamp(22px,3.4vw,44px);padding-bottom:clamp(22px,3.4vw,44px)}
.grid{display:grid;gap:clamp(16px,2.6vw,32px)}
.grid--7-5{grid-template-columns:minmax(0,7fr) minmax(0,5fr)}
.grid--8-4{grid-template-columns:minmax(0,8fr) minmax(0,4fr)}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:9px;
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.18em;
  color:var(--red);
}
.eyebrow::before{
  content:"";
  width:24px;
  height:3px;
  background:var(--red);
  transform:skewX(-30deg);
}
.lead{
  font-size:clamp(17px,1.6vw,19px);
  line-height:1.72;
  color:#3B414C;
  max-width:46ch;
}
.mono{
  font-family:var(--font-mono);
  font-weight:600;
  letter-spacing:.02em;
  font-feature-settings:"tnum" 1;
}
.metric{display:block}
.metric__value{
  display:block;
  font-family:var(--font-mono);
  font-weight:600;
  font-size:clamp(28px,4vw,44px);
  line-height:1.06;
  color:var(--ink);
  letter-spacing:-.01em;
}
.metric__label{
  display:block;
  margin-top:2px;
  font-size:12.5px;
  letter-spacing:.06em;
  color:var(--muted);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 10px;
  border-radius:var(--r-tag);
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:600;
  letter-spacing:.08em;
  background:var(--grey);
  color:var(--ink);
}
.tag--red{background:rgba(200,16,46,.12);color:#9D0C23}
.tag--blue{background:var(--ice);color:#1D47B8}
.tag--yellow{background:var(--yellow);color:#3A2B00}
.tag--green{background:rgba(31,157,106,.14);color:#137A51}

.panel{
  position:relative;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:clamp(18px,2.4vw,30px);
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.panel:hover{
  transform:translateY(-2px);
  border-color:rgba(200,16,46,.45);
  box-shadow:inset 4px 0 0 var(--red),var(--shadow);
}
.panel--ice{background:var(--ice);border-color:#BFD0FF}

.breadcrumb{padding-top:14px;padding-bottom:14px}
.breadcrumb__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--muted);
}
.breadcrumb__item{display:flex;align-items:center;gap:8px}
.breadcrumb__item + .breadcrumb__item::before{content:"/";color:var(--line)}
.breadcrumb__link{color:#3B414C;border-bottom:1px solid transparent}
.breadcrumb__link:hover,.breadcrumb__link:focus-visible{color:var(--blue);border-bottom-color:var(--blue)}

.media{
  position:relative;
  display:block;
  width:100%;
  aspect-ratio:16 / 10;
  overflow:hidden;
  border-radius:var(--r-shot);
  border:1px solid rgba(183,190,201,.55);
  background:
    linear-gradient(-7deg,rgba(200,16,46,.22) 0 38%,rgba(47,107,255,.18) 38% 62%,rgba(21,24,30,.94) 62% 100%),
    repeating-linear-gradient(90deg,rgba(255,255,255,.06) 0 1px,transparent 1px 44px),
    var(--deep);
}
.media__img{width:100%;height:100%;object-fit:cover}
.media--wide{aspect-ratio:21 / 9}
.media--tall{aspect-ratio:3 / 4}
.media--square{aspect-ratio:1 / 1}
.media__caption{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  padding:10px 14px;
  background:linear-gradient(0deg,rgba(11,13,16,.88),rgba(11,13,16,0));
  color:#fff;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.04em;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 20px;
  border:2px solid transparent;
  border-radius:var(--r-tag);
  font-family:var(--font-head);
  font-weight:700;
  font-size:15px;
  line-height:1.2;
  letter-spacing:.01em;
  text-decoration:none;
  cursor:pointer;
  transition:transform var(--dur) var(--ease),background-color var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.btn--primary{background:var(--red);color:#fff;border-color:var(--red)}
.btn--primary:hover,.btn--primary:focus-visible{background:var(--ink);border-color:var(--ink);color:#fff;transform:translateY(-2px)}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn--ghost:hover,.btn--ghost:focus-visible{background:var(--ice);border-color:var(--blue);color:var(--blue);transform:translateY(-2px)}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;
  top:8px;
  left:calc(var(--rail-w) + 12px);
  z-index:130;
  padding:10px 18px;
  background:var(--ink);
  color:#fff;
  font-size:14px;
  font-weight:700;
  border:2px solid var(--blue);
  border-radius:var(--r-tag);
  transform:translateY(-180%);
  transition:transform var(--dur) var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{transform:translateY(0);color:#fff}

/* ---------- 左侧品牌轨道 ---------- */
.site-rail{
  position:fixed;
  top:0;
  left:0;
  bottom:0;
  z-index:60;
  width:var(--rail-w);
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:20px;
  padding:16px 0 18px;
  background:linear-gradient(180deg,var(--deep) 0%,var(--ink) 62%,#0F1115 100%);
  border-right:1px solid rgba(183,190,201,.18);
}
.rail__mark{
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:2px;
  width:52px;
  height:52px;
  border-radius:14px;
  background:var(--red);
  color:#fff;
  transition:transform var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.rail__mark-cn{font-family:var(--font-head);font-weight:900;font-size:20px;line-height:1;letter-spacing:0}
.rail__mark-en{font-family:var(--font-mono);font-size:9px;font-weight:600;letter-spacing:.14em;opacity:.9}
.rail__mark:hover,.rail__mark:focus-visible{background:var(--blue);color:#fff;transform:rotate(-7deg)}
.rail__vertical{
  margin:0;
  writing-mode:vertical-rl;
  text-orientation:mixed;
  font-size:12px;
  font-weight:500;
  letter-spacing:.28em;
  line-height:1.5;
  color:var(--grey);
  opacity:.72;
}
.rail__tick{
  flex:1 1 auto;
  width:2px;
  min-height:40px;
  margin-top:auto;
  background:linear-gradient(180deg,var(--red) 0%,rgba(200,16,46,.5) 30%,rgba(47,107,255,.6) 70%,rgba(47,107,255,0) 100%);
}

/* ---------- 页头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:50;
  background:var(--paper);
  border-bottom:1px solid var(--line);
}
.site-header__inner{display:flex;flex-direction:column;min-width:0}

.header-top{
  display:flex;
  align-items:center;
  gap:18px;
  padding:8px var(--gutter);
  background:var(--deep);
  color:var(--grey);
  font-size:13px;
  border-bottom:1px solid rgba(183,190,201,.16);
}
.header-top__line{
  display:flex;
  align-items:center;
  gap:9px;
  margin:0;
  font-weight:700;
  color:#fff;
  letter-spacing:.02em;
}
.header-top__dot{
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--red);
  box-shadow:0 0 0 4px rgba(200,16,46,.22);
}
.header-top__hint{
  margin:0;
  font-size:12px;
  letter-spacing:.04em;
  color:var(--line);
  white-space:nowrap;
}
.header-top__tools{margin-left:auto;display:flex;align-items:center;gap:8px}
.header-top__link{
  padding:3px 10px;
  border:1px solid rgba(220,230,255,.24);
  border-radius:var(--r-tag);
  color:var(--ice);
  font-size:12.5px;
  font-weight:700;
  white-space:nowrap;
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.header-top__link:hover,.header-top__link:focus-visible{
  background:var(--blue);
  border-color:var(--blue);
  color:#fff;
}

.header-main{
  position:relative;
  display:flex;
  align-items:center;
  gap:clamp(12px,2.4vw,32px);
  padding:14px var(--gutter);
  background:var(--paper);
}
.header-main::before{
  content:"";
  position:absolute;
  top:0;
  bottom:0;
  left:-2%;
  width:clamp(160px,26vw,340px);
  background:linear-gradient(-7deg,rgba(200,16,46,.14),rgba(47,107,255,.11) 60%,rgba(47,107,255,0));
  transform:skewX(-7deg);
  transform-origin:left center;
  pointer-events:none;
}
.brand{
  position:relative;
  z-index:1;
  display:flex;
  flex-direction:column;
  gap:1px;
  margin-right:auto;
  color:var(--ink);
}
.brand__mark{
  font-family:var(--font-head);
  font-weight:900;
  font-size:clamp(20px,2.4vw,27px);
  line-height:1.1;
  letter-spacing:-.02em;
  color:var(--ink);
  transition:color var(--dur) var(--ease);
}
.brand__slash{
  display:inline-block;
  padding:0 2px;
  color:var(--red);
  transform:skewX(-12deg);
}
.brand__sub{
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:600;
  letter-spacing:.22em;
  color:var(--muted);
  text-transform:uppercase;
}
.brand:hover .brand__mark,.brand:focus-visible .brand__mark{color:var(--red)}

.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:10px 14px;
  background:var(--ink);
  color:#fff;
  border:1px solid var(--ink);
  border-radius:var(--r-tag);
  font-weight:700;
  font-size:13px;
  letter-spacing:.04em;
  transition:background-color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.nav-toggle:hover,.nav-toggle:focus-visible{background:var(--deep);border-color:var(--blue)}
.nav-toggle__bars{display:flex;flex-direction:column;gap:3px;width:18px}
.nav-toggle__bars i{
  display:block;
  height:2px;
  width:100%;
  background:var(--red);
  transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1){transform:translateY(5px) rotate(45deg);background:var(--yellow)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3){transform:translateY(-5px) rotate(-45deg);background:var(--yellow)}
.nav-toggle__label{white-space:nowrap}

.site-nav{
  display:flex;
  align-items:center;
  gap:clamp(10px,1.8vw,24px);
  min-width:0;
}
.site-nav__list{display:flex;align-items:center;gap:clamp(4px,1.1vw,14px);min-width:0}
.site-nav__item{min-width:0}
.site-nav__link{
  display:inline-flex;
  align-items:baseline;
  gap:6px;
  padding:8px 6px 9px;
  color:var(--ink);
  font-family:var(--font-head);
  font-weight:700;
  font-size:15.5px;
  line-height:1.3;
  white-space:nowrap;
  border-bottom:2px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.site-nav__idx{
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:600;
  letter-spacing:.06em;
  color:var(--line);
  transition:color var(--dur) var(--ease);
}
.site-nav__link:hover,.site-nav__link:focus-visible{color:var(--red);border-bottom-color:var(--red)}
.site-nav__link:hover .site-nav__idx,.site-nav__link:focus-visible .site-nav__idx{color:var(--red)}
.site-nav__link[aria-current="page"]{
  color:var(--red);
  border-bottom-color:var(--red);
  background:linear-gradient(180deg,rgba(200,16,46,0) 55%,rgba(200,16,46,.10) 100%);
}
.site-nav__link[aria-current="page"] .site-nav__idx{color:var(--red)}
.site-nav__cta{padding:9px 16px;font-size:14px;white-space:nowrap}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  background:var(--ink);
  color:var(--grey);
  overflow:hidden;
}
.footer__edge{
  height:6px;
  background:linear-gradient(90deg,var(--red) 0 30%,#8C0B20 30% 42%,var(--blue) 42% 62%,var(--yellow) 62% 68%,var(--deep) 68% 100%);
}
.footer__inner{
  width:100%;
  max-width:var(--wrap);
  margin-left:auto;
  margin-right:auto;
  padding:clamp(30px,5vw,58px) var(--gutter) 24px;
}
.footer__grid{
  display:grid;
  grid-template-columns:minmax(0,1.5fr) minmax(0,.8fr) minmax(0,1.1fr);
  gap:clamp(22px,4vw,56px);
  padding-bottom:clamp(24px,4vw,44px);
  border-bottom:1px solid rgba(183,190,201,.18);
}
.footer__brand{display:flex;flex-direction:column;align-items:flex-start}
.footer__logo{
  display:flex;
  flex-direction:column;
  gap:6px;
  margin:0 0 14px;
  font-family:var(--font-head);
  font-weight:900;
  font-size:clamp(22px,2.6vw,27px);
  line-height:1.15;
  letter-spacing:-.02em;
  color:#fff;
}
.footer__logo-en{
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:600;
  letter-spacing:.24em;
  color:var(--line);
}
.footer__summary{
  margin:0 0 20px;
  max-width:34ch;
  font-size:15px;
  line-height:1.7;
  color:#CFD4DC;
}
.footer__cta{margin-top:auto}
.footer__col{min-width:0}
.footer__title{
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.18em;
  color:var(--yellow);
}
.footer__list{display:grid;gap:1px}
.footer__item{display:block}
.footer__link{
  display:inline-block;
  padding:6px 0;
  color:#DFE3EA;
  font-size:15px;
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.footer__link:hover,.footer__link:focus-visible{color:#fff;border-bottom-color:var(--red);transform:translateX(2px)}
.footer__link[aria-current="page"]{color:var(--yellow);border-bottom-color:var(--yellow)}
.footer__contact{display:grid;gap:12px}
.footer__label{
  display:block;
  font-family:var(--font-mono);
  font-size:10.5px;
  font-weight:600;
  letter-spacing:.16em;
  color:var(--line);
}
.footer__value{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:10px;
  margin-top:2px;
  font-size:15px;
  color:#fff;
  word-break:break-word;
}
.footer__value--mono{font-family:var(--font-mono);font-weight:600;letter-spacing:.02em}
.copy-btn{
  padding:3px 10px;
  border:1px solid rgba(220,230,255,.3);
  border-radius:var(--r-tag);
  color:var(--ice);
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:600;
  letter-spacing:.06em;
  transition:background-color var(--dur) var(--ease),border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.copy-btn:hover,.copy-btn:focus-visible{background:var(--blue);border-color:var(--blue);color:#fff}
.copy-btn[data-copied="true"]{background:var(--green);border-color:var(--green);color:#fff}
.footer__note{margin:14px 0 0;font-size:12px;line-height:1.7;color:#8B929D;max-width:32ch}
.footer__legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 22px;
  padding:18px 0;
  margin:0;
}
.footer__legal-link{
  color:#DFE3EA;
  font-size:14px;
  border-bottom:1px solid rgba(183,190,201,.4);
  padding-bottom:2px;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.footer__legal-link:hover,.footer__legal-link:focus-visible{color:var(--yellow);border-bottom-color:var(--yellow)}
.footer__legal-link[aria-current="page"]{color:var(--yellow);border-bottom-color:var(--yellow)}
.footer__bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:8px 26px;
  padding-top:14px;
  border-top:1px solid rgba(183,190,201,.14);
  color:#9AA2AE;
  font-size:12.5px;
}
.footer__icp{margin:0;font-family:var(--font-mono);font-weight:600;letter-spacing:.04em}
.footer__copy{margin:0}

/* ---------- 阅读进度与显现 ---------- */
.read-progress{
  position:fixed;
  top:0;
  left:var(--rail-w);
  right:0;
  height:3px;
  z-index:70;
  background:transparent;
  pointer-events:none;
}
.read-progress__bar{
  height:100%;
  width:0;
  background:linear-gradient(90deg,var(--red),var(--blue));
  transition:width 90ms linear;
}
.reveal-ready [data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity 420ms var(--ease),transform 420ms var(--ease);
}
.reveal-ready [data-reveal].is-revealed{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1180px){
  .header-top__hint{display:none}
}
@media (max-width:1023px){
  :root{--rail-w:64px}
  .rail__mark{width:44px;height:44px;border-radius:12px}
  .rail__mark-cn{font-size:17px}
  .rail__mark-en{font-size:8px}
  .rail__vertical{font-size:11px;letter-spacing:.2em}
  .site-rail{gap:16px;padding-top:14px}
}
@media (max-width:960px){
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    max-height:min(72vh,560px);
    overflow-y:auto;
    padding:14px var(--gutter) 22px;
    background:var(--ink);
    border-top:3px solid var(--red);
    box-shadow:0 20px 44px rgba(11,13,16,.34);
  }
  .site-nav[data-open="true"]{display:flex}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .site-nav__item + .site-nav__item{border-top:1px solid rgba(183,190,201,.16)}
  .site-nav__link{
    width:100%;
    justify-content:flex-start;
    padding:13px 12px;
    font-size:18px;
    color:#fff;
    border-bottom:0;
    border-left:3px solid transparent;
  }
  .site-nav__idx{color:var(--yellow);font-size:11px}
  .site-nav__link:hover,.site-nav__link:focus-visible{
    color:#fff;
    background:rgba(200,16,46,.18);
    border-left-color:var(--red);
  }
  .site-nav__link[aria-current="page"]{
    color:#fff;
    background:rgba(200,16,46,.26);
    border-left-color:var(--red);
    border-bottom-color:transparent;
  }
  .site-nav__link[aria-current="page"] .site-nav__idx{color:#fff}
  .site-nav__cta{margin-top:16px;align-self:flex-start}
  .footer__grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
  .footer__brand{grid-column:1 / -1}
}
@media (max-width:860px){
  .grid--7-5,.grid--8-4{grid-template-columns:minmax(0,1fr)}
  .slide-7,.slide-5{grid-column:auto}
}
@media (max-width:767px){
  :root{--rail-w:0px}
  body{padding-top:8px}
  .site-rail{
    top:0;
    left:0;
    right:0;
    bottom:auto;
    width:auto;
    height:8px;
    flex-direction:row;
    align-items:center;
    gap:0;
    padding:0;
    background:linear-gradient(90deg,var(--red) 0 44%,#8C0B20 44% 52%,var(--blue) 52% 78%,var(--yellow) 78% 85%,var(--ink) 85% 100%);
    border-right:0;
    border-bottom:1px solid rgba(11,13,16,.45);
  }
  .rail__mark,.rail__vertical,.rail__tick{display:none}
  .site-header{top:8px}
  .read-progress{left:0;top:8px}
  .skip-link{left:12px}
  .header-top{gap:10px;flex-wrap:wrap}
  .header-top__line{font-size:12.5px}
  .header-top__tools{margin-left:0;width:100%}
  .header-top__link{flex:1 1 auto;text-align:center}
  .header-main{padding-top:12px;padding-bottom:12px}
  .brand__sub{letter-spacing:.16em}
  .footer__grid{grid-template-columns:minmax(0,1fr)}
  .footer__legal{gap:10px 18px}
  .footer__bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:420px){
  .nav-toggle{padding:9px 11px;font-size:12px}
  .brand__mark{font-size:20px}
}

/* ---------- 动效与焦点降级 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .reveal-ready [data-reveal]{opacity:1;transform:none;transition:none}
  .panel:hover,.btn:hover,.footer__link:hover,.rail__mark:hover{transform:none}
  .site-nav__link:hover,.site-nav__link:focus-visible{transform:none}
}