/* ============================================================
   米乐赛场 / assets/site.css
   共享外壳：reset、变量、中文排版、头部、页脚、基础组件
   ============================================================ */

:root{
  --ink:#071C18;
  --panel:#0E2E27;
  --panel-deep:#0B241F;
  --cyan:#35F0C0;
  --mist:#9FF7DE;
  --amber:#F5B34C;
  --cream:#FFF8EA;
  --coral:#E68672;
  --mute:#9BB0A8;
  --sand:#F3EFE4;
  --violet:#7A5CFF;

  --line:rgba(159,247,222,.16);
  --line-strong:rgba(53,240,192,.42);
  --line-soft:rgba(159,247,222,.08);

  --wrap:1240px;
  --gutter:clamp(18px,4vw,56px);
  --header-h:76px;

  --r-lg:28px;
  --r-md:16px;
  --r-sm:10px;
  --r-pill:999px;

  --font-display:"Barlow Condensed","Archivo Narrow","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

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

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,p,ul,ol,li,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
button{font:inherit;color:inherit}
img,svg{max-width:100%;display:block}
main{display:block}

/* ---------- base / 中文排版 ---------- */
body{
  background-color:var(--ink);
  background-image:
    radial-gradient(920px 520px at 88% -12%, rgba(53,240,192,.10), transparent 65%),
    radial-gradient(720px 440px at -8% 6%, rgba(122,92,255,.09), transparent 70%);
  background-repeat:no-repeat;
  color:var(--cream);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.16;
  letter-spacing:-.01em;
  color:var(--cream);
  text-wrap:balance;
}
h1{font-size:clamp(2.2rem,4.6vw,3.9rem)}
h2{font-size:clamp(1.6rem,2.9vw,2.55rem)}
h3{font-size:clamp(1.2rem,1.8vw,1.55rem);letter-spacing:0}
p{text-wrap:pretty}

a{color:var(--mist);text-decoration-color:rgba(53,240,192,.45);text-underline-offset:3px}
a:hover{color:var(--cyan)}

:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:4px;
}

::selection{background:rgba(53,240,192,.28);color:var(--cream)}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;
  top:0;
  left:50%;
  transform:translate(-50%,-150%);
  z-index:200;
  padding:.72rem 1.4rem;
  border-radius:0 0 14px 14px;
  background:var(--amber);
  color:#221605;
  font-weight:700;
  font-size:.92rem;
  text-decoration:none;
  box-shadow:0 18px 40px -20px rgba(0,0,0,.9);
  transition:transform .22s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{transform:translate(-50%,0);color:#221605;outline-offset:-4px}

/* ---------- 头部框架 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(7,28,24,.96);
  border-bottom:1px solid var(--line);
}
.site-header::before,
.site-header::after{
  content:"";
  position:absolute;
  top:0;
  height:2px;
  width:clamp(28px,7vw,140px);
  pointer-events:none;
}
.site-header::before{left:0;background:linear-gradient(90deg,var(--cyan),transparent)}
.site-header::after{right:0;background:linear-gradient(270deg,var(--amber),transparent)}

.header-inner{
  max-width:var(--wrap);
  margin:0 auto;
  padding:0 var(--gutter);
  min-height:var(--header-h);
  display:flex;
  align-items:center;
  gap:clamp(12px,2.4vw,36px);
}

/* 大屏左侧刻度轨：让导航成为页面边框 */
.frame-rail{display:none}
@media (min-width:1440px){
  .frame-rail{
    display:block;
    position:fixed;
    inset:0 auto 0 0;
    width:14px;
    pointer-events:none;
    z-index:1;
    background-image:
      linear-gradient(180deg,rgba(53,240,192,.40),rgba(53,240,192,.10) 58%,rgba(122,92,255,.35)),
      repeating-linear-gradient(180deg,var(--line-strong) 0 12px,transparent 12px 148px);
    background-size:1px 100%,10px 100%;
    background-position:6px 0,0 0;
    background-repeat:no-repeat,repeat-y;
  }
}

/* 品牌 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  text-decoration:none;
  color:inherit;
  min-height:44px;
  flex:0 0 auto;
}
.brand:hover{color:inherit}
.brand-mark{
  width:40px;
  height:40px;
  display:grid;
  place-items:center;
  border-radius:13px;
  background:var(--cyan);
  color:#03231C;
  font-family:var(--font-mono);
  font-size:.76rem;
  font-weight:700;
  letter-spacing:.12em;
  box-shadow:0 0 0 1px rgba(53,240,192,.35),0 14px 26px -16px rgba(53,240,192,.95);
}
.brand-text{display:grid;gap:2px}
.brand-name{
  font-family:var(--font-display);
  font-size:1.34rem;
  font-weight:800;
  letter-spacing:.02em;
  line-height:1.05;
  color:var(--cream);
}
.brand-line{
  font-family:var(--font-mono);
  font-size:.66rem;
  letter-spacing:.14em;
  color:var(--mute);
  line-height:1.2;
}

/* 导航 */
.site-nav{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:clamp(8px,1.5vw,24px);
}
.nav-list{
  display:flex;
  align-items:center;
  gap:clamp(4px,1vw,16px);
}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:baseline;
  gap:6px;
  padding:9px 3px;
  border-radius:8px;
  color:var(--mist);
  font-size:.94rem;
  line-height:1.3;
  text-decoration:none;
  white-space:nowrap;
  transition:color .2s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:2px;
  height:2px;
  border-radius:2px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .26s var(--ease),background .2s linear;
}
.nav-link:hover,.nav-link:focus-visible{color:var(--cream)}
.nav-link:hover::after,.nav-link:focus-visible::after{transform:scaleX(1)}
.nav-index{
  font-family:var(--font-mono);
  font-size:.6rem;
  letter-spacing:.1em;
  color:rgba(155,176,168,.85);
  transition:color .2s linear;
}
.nav-link:hover .nav-index{color:var(--cyan)}
.nav-link[aria-current="page"]{color:var(--cream)}
.nav-link[aria-current="page"] .nav-index{color:var(--amber)}
.nav-link[aria-current="page"]::after{transform:scaleX(1);background:var(--amber)}

.nav-cta{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 18px;
  border-radius:var(--r-pill);
  border:1px solid rgba(245,179,76,.55);
  background:transparent;
  color:var(--amber);
  font-size:.88rem;
  font-weight:600;
  letter-spacing:.04em;
  text-decoration:none;
  white-space:nowrap;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
}
.nav-cta::before{
  content:"";
  width:6px;
  height:6px;
  border-radius:50%;
  background:currentColor;
  box-shadow:0 0 0 3px rgba(245,179,76,.18);
}
.nav-cta:hover,.nav-cta:focus-visible{
  background:var(--amber);
  border-color:var(--amber);
  color:#20160A;
  transform:translateY(-1px);
}

/* 移动按钮 */
.nav-toggle{
  display:none;
  margin-left:auto;
  align-items:center;
  gap:10px;
  padding:10px 16px;
  border-radius:var(--r-pill);
  border:1px solid var(--line-strong);
  background:rgba(14,46,39,.7);
  color:var(--cream);
  font-family:var(--font-mono);
  font-size:.74rem;
  letter-spacing:.14em;
  cursor:pointer;
  transition:border-color .2s linear,background .2s linear;
}
.nav-toggle:hover{border-color:var(--cyan)}
.nav-toggle-bars{display:grid;gap:4px;width:16px}
.nav-toggle-bars i{
  display:block;
  height:2px;
  border-radius:2px;
  background:var(--cyan);
  transition:transform .26s var(--ease),opacity .2s linear;
}
.site-header[data-open="true"] .nav-toggle-bars i:first-child{transform:translateY(3px) rotate(45deg)}
.site-header[data-open="true"] .nav-toggle-bars i:last-child{transform:translateY(-3px) rotate(-45deg)}

/* 滚动进度 */
.scroll-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  overflow:hidden;
  pointer-events:none;
}
.scroll-progress-bar{
  display:block;
  height:100%;
  width:0;
  background:linear-gradient(90deg,var(--cyan),var(--mist) 58%,var(--amber));
  transition:width .12s linear;
}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:0;
  padding-top:clamp(40px,6vw,72px);
  border-top:1px solid var(--line);
  background-image:linear-gradient(180deg,rgba(14,46,39,.92),rgba(7,28,24,.98) 72%);
}
.footer-inner{
  max-width:var(--wrap);
  margin:0 auto;
  padding:0 var(--gutter);
}
.footer-top{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.35fr;
  gap:clamp(24px,3.4vw,56px);
  padding-bottom:clamp(28px,4vw,48px);
}

.footer-brand{display:grid;gap:8px;align-content:start}
.footer-brand-mark{
  width:36px;
  height:36px;
  display:grid;
  place-items:center;
  border-radius:50%;
  border:1px solid var(--line-strong);
  color:var(--cyan);
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.12em;
  margin-bottom:6px;
}
.footer-brand-name{
  font-family:var(--font-display);
  font-size:1.5rem;
  font-weight:800;
  color:var(--cream);
  line-height:1.1;
}
.footer-brand-line{
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.16em;
  color:var(--cyan);
}
.footer-note{
  font-size:.84rem;
  line-height:1.7;
  color:var(--mute);
  max-width:34ch;
}

.footer-col{display:grid;gap:12px;align-content:start}
.footer-col-title{
  font-family:var(--font-mono);
  font-size:.68rem;
  font-weight:600;
  letter-spacing:.2em;
  color:var(--mist);
  padding-bottom:8px;
  border-bottom:1px solid var(--line);
}
.footer-list{display:grid;gap:9px}
.footer-link{
  display:inline-flex;
  align-items:baseline;
  gap:8px;
  color:var(--mute);
  font-size:.92rem;
  text-decoration:none;
  transition:color .2s linear;
}
.footer-link::before{
  content:"";
  width:5px;
  height:5px;
  border-radius:50%;
  background:rgba(53,240,192,.4);
  flex:0 0 auto;
  transition:background .2s linear;
}
.footer-link:hover,.footer-link:focus-visible{color:var(--cream)}
.footer-link:hover::before,.footer-link:focus-visible::before{background:var(--amber)}

.footer-col--contact{gap:10px}
.footer-contact-list{display:grid;gap:0}
.footer-contact-item{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:6px 10px;
  padding:9px 0;
  border-bottom:1px dashed rgba(159,247,222,.14);
}
.footer-contact-item:first-child{padding-top:0}
.contact-label{
  flex:0 0 auto;
  min-width:34px;
  font-family:var(--font-mono);
  font-size:.64rem;
  letter-spacing:.16em;
  color:rgba(155,176,168,.9);
}
.contact-value{
  font-family:var(--font-mono);
  font-size:.78rem;
  color:var(--cream);
  word-break:break-all;
  line-height:1.5;
}
.contact-value--text{
  font-family:var(--font-body);
  font-size:.84rem;
  color:var(--mist);
}
.copy-btn{
  margin-left:auto;
  padding:3px 11px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  background:transparent;
  color:var(--mute);
  font-family:var(--font-mono);
  font-size:.64rem;
  letter-spacing:.12em;
  cursor:pointer;
  transition:color .2s linear,border-color .2s linear,background .2s linear;
}
.copy-btn:hover{border-color:var(--cyan);color:var(--cyan)}
.copy-btn[data-copied="true"]{border-color:var(--cyan);color:var(--cyan);background:rgba(53,240,192,.12)}
.copy-btn[data-copied="false"]{border-color:var(--coral);color:var(--coral)}

.footer-version-bar{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 16px;
  padding:14px 18px;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  background:rgba(11,36,31,.7);
  font-family:var(--font-mono);
  font-size:.74rem;
  letter-spacing:.06em;
  color:var(--mute);
}
.version-chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--cyan);
}
.version-chip::before{
  content:"";
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 0 3px rgba(53,240,192,.16);
}
.version-sep{color:rgba(159,247,222,.35)}
.version-date{color:var(--mute)}
.footer-legal{
  margin-left:auto;
  display:flex;
  flex-wrap:wrap;
  gap:8px 18px;
}
.legal-link{
  color:var(--mist);
  font-family:var(--font-mono);
  font-size:.74rem;
  letter-spacing:.06em;
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .2s linear,border-color .2s linear;
}
.legal-link:hover,.legal-link:focus-visible{color:var(--cyan);border-color:var(--cyan)}

.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:8px 20px;
  padding:16px 2px 24px;
  border-top:1px solid var(--line-soft);
  margin-top:14px;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.06em;
  color:rgba(155,176,168,.85);
}
.footer-copy{color:rgba(155,176,168,.85)}
.footer-icp{color:rgba(155,176,168,.7)}

/* ---------- 基础组件 ---------- */
.wrap{
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.section{padding-block:clamp(44px,6.5vw,96px)}
.section--tight{padding-block:clamp(28px,4vw,56px)}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cyan);
}
.eyebrow::before{
  content:"";
  width:clamp(18px,4vw,44px);
  height:1px;
  background:linear-gradient(90deg,var(--cyan),transparent);
}

.section-index{
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.18em;
  color:var(--mute);
  display:inline-flex;
  align-items:center;
  gap:10px;
}
.section-index strong{color:var(--cyan);font-weight:600}

.mono-num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:0;
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 12px;
  border-radius:var(--r-pill);
  border:1px solid var(--line-strong);
  color:var(--mist);
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.1em;
  line-height:1.6;
  white-space:nowrap;
}
.tag--amber{border-color:rgba(245,179,76,.55);color:var(--amber)}
.tag--coral{border-color:rgba(230,134,114,.55);color:var(--coral)}
.tag--violet{border-color:rgba(122,92,255,.55);color:#B6A6FF}

.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:13px 24px;
  border-radius:var(--r-pill);
  border:1px solid transparent;
  font-family:var(--font-body);
  font-size:.94rem;
  font-weight:600;
  line-height:1.2;
  text-decoration:none;
  cursor:pointer;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
}
.btn:hover{transform:translateY(-1px)}
.btn--amber{background:var(--amber);color:#221605;box-shadow:0 18px 34px -22px rgba(245,179,76,.95)}
.btn--amber:hover{background:#FFC76A;color:#221605}
.btn--cyan{background:var(--cyan);color:#03231C}
.btn--cyan:hover{background:#5CF5CE;color:#03231C}
.btn--ghost{border-color:var(--line-strong);background:rgba(14,46,39,.55);color:var(--mist)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cream)}

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.1em;
  color:var(--mute);
}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li + li::before{content:"›";color:rgba(53,240,192,.5)}
.breadcrumb a{color:var(--mist);text-decoration:none}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb [aria-current="page"]{color:var(--cream)}

.prose{
  max-width:72ch;
  font-size:1.01rem;
  line-height:1.85;
  color:rgba(255,248,234,.86);
}
.prose > * + *{margin-top:1em}
.prose h2,.prose h3{color:var(--cream);margin-top:1.6em}
.prose strong{color:var(--cream)}
.prose a{color:var(--cyan)}
.prose ul,.prose ol{padding-left:1.2em;list-style:revert}
.prose li + li{margin-top:.45em}

.panel-sand{
  background:var(--sand);
  color:#0B241F;
  border-radius:var(--r-lg);
  padding:clamp(22px,4vw,52px);
  border:1px solid rgba(7,28,24,.12);
}
.panel-sand h1,.panel-sand h2,.panel-sand h3{color:#0B241F}
.panel-sand .prose{color:#22332D}
.panel-sand .prose strong{color:#071C18}
.panel-sand .prose a{color:#0C6B57}
.panel-sand .section-index,.panel-sand .eyebrow{color:#0C6B57}

.grid{display:grid;gap:clamp(16px,2.4vw,32px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--split{grid-template-columns:minmax(0,1.15fr) minmax(0,1fr)}

.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  border-radius:var(--r-lg);
  border:1px solid var(--line);
  background-color:var(--panel);
  background-image:
    linear-gradient(135deg,rgba(53,240,192,.16),rgba(14,46,39,.92) 55%,rgba(122,92,255,.18)),
    repeating-linear-gradient(90deg,rgba(159,247,222,.10) 0 1px,transparent 1px 44px),
    repeating-linear-gradient(0deg,rgba(159,247,222,.10) 0 1px,transparent 1px 44px);
  aspect-ratio:16/9;
}
.media-frame--tall{aspect-ratio:4/5}
.media-frame--square{aspect-ratio:1/1}
.media-frame > img,
.media-frame > picture,
.media-frame > picture > img{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(.78) contrast(1.06);
}
.figure{display:grid;gap:10px;margin:0}
.media-caption{
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.1em;
  color:var(--mute);
}

.toc{display:grid;gap:2px;font-family:var(--font-mono);font-size:.74rem;letter-spacing:.06em}
.toc-link{
  display:flex;
  align-items:center;
  gap:8px;
  padding:7px 0 7px 12px;
  border-left:1px solid var(--line);
  color:var(--mute);
  text-decoration:none;
  transition:color .2s linear,border-color .2s linear;
}
.toc-link:hover{color:var(--cream);border-color:var(--line-strong)}
.toc-link[aria-current="true"]{color:var(--amber);border-color:var(--amber)}

.back-to-top{
  position:fixed;
  right:clamp(14px,3vw,32px);
  bottom:clamp(14px,3vw,28px);
  z-index:70;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:11px 18px;
  border-radius:var(--r-pill);
  border:1px solid var(--line-strong);
  background:rgba(14,46,39,.94);
  color:var(--mist);
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.14em;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .26s var(--ease),transform .26s var(--ease),visibility .26s linear,border-color .2s linear;
}
.back-to-top:hover{border-color:var(--amber);color:var(--amber)}
.back-to-top[data-visible="true"]{opacity:1;visibility:visible;transform:none}

html.js [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .55s var(--ease),transform .55s var(--ease);
}
html.js [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1180px){
  .nav-index{display:none}
  .brand-line{display:none}
  .nav-link{font-size:.9rem}
  .footer-top{grid-template-columns:1.4fr 1fr 1fr;gap:clamp(22px,3vw,40px)}
  .footer-col--contact{grid-column:1 / -1}
}

@media (max-width:980px){
  :root{--header-h:70px}
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:fixed;
    left:0;
    right:0;
    top:var(--header-h);
    bottom:0;
    margin-left:0;
    display:flex;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:18px var(--gutter) 42px;
    background:var(--panel);
    background-image:linear-gradient(180deg,rgba(53,240,192,.08),transparent 40%);
    border-top:1px solid var(--line);
    overflow-y:auto;
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s linear;
  }
  .site-nav[data-open="true"]{
    opacity:1;
    visibility:visible;
    transform:none;
  }
  html[data-nav-open="true"]{overflow:hidden}
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-item{border-bottom:1px solid rgba(159,247,222,.12)}
  .nav-link{
    width:100%;
    justify-content:flex-start;
    padding:16px 4px;
    font-size:1.05rem;
  }
  .nav-index{display:inline-block;font-size:.66rem;min-width:24px}
  .nav-link::after{display:none}
  .nav-link[aria-current="page"]{color:var(--amber)}
  .nav-cta{
    margin-top:22px;
    justify-content:center;
    padding:15px 22px;
    font-size:.98rem;
  }
  .footer-top{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-col--contact{grid-column:1 / -1}
  .grid--2,.grid--3,.grid--split{grid-template-columns:minmax(0,1fr)}
}

@media (max-width:640px){
  :root{--header-h:64px}
  body{font-size:16px}
  .header-inner{gap:10px;padding-inline:clamp(14px,4vw,22px)}
  .brand-mark{width:34px;height:34px;border-radius:11px;font-size:.68rem}
  .brand-name{font-size:1.16rem}
  .nav-toggle{padding:9px 13px;font-size:.68rem}
  .footer-top{grid-template-columns:minmax(0,1fr);gap:26px}
  .footer-legal{margin-left:0;width:100%}
  .footer-version-bar{font-size:.7rem;padding:12px 14px}
  .footer-base{flex-direction:column;align-items:flex-start;font-size:.68rem}
  .filter-bar,.filter{padding-inline:14px}
  .back-to-top{padding:10px 14px;font-size:.66rem}
}

/* ---------- 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;
    scroll-behavior:auto !important;
  }
  html.js [data-reveal]{opacity:1;transform:none}
  .scroll-progress-bar{transition:none}
}