/* =========================================================
   登录入口赛场 · /assets/site.css
   共享外壳：头部、页脚、通用组件
   ========================================================= */

*,*::before,*::after{box-sizing:border-box}

:root{
  --ink:#0B1F1A;
  --char:#111417;
  --deep:#16302B;
  --moss:#2F4A3A;
  --stone:#6E7A72;
  --bone:#F2EBDD;
  --orange:#FF6A1A;
  --cyan:#35E6D2;
  --clay:#A9563B;
  --alert:#F5C451;

  --bone-80:rgba(242,235,221,.82);
  --bone-60:rgba(242,235,221,.62);
  --bone-40:rgba(242,235,221,.40);
  --line:rgba(110,122,114,.32);
  --line-2:rgba(110,122,114,.60);
  --orange-12:rgba(255,106,26,.12);
  --cyan-14:rgba(53,230,210,.14);

  --font-display:"Barlow Condensed","Oswald","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"Inter","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --fs-12:12px;
  --fs-14:14px;
  --fs-16:16px;
  --fs-20:20px;
  --fs-28:clamp(22px,2.4vw,28px);
  --fs-44:clamp(30px,4.4vw,44px);
  --fs-72:clamp(40px,7vw,72px);
  --fs-112:clamp(52px,10.5vw,112px);

  --shell:1240px;
  --gutter:clamp(16px,4vw,44px);
  --header-h:64px;
  --r-pill:999px;
  --r-xs:2px;
  --r-sm:6px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:110px;
}

body{
  margin:0;
  background:var(--ink);
  color:var(--bone);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background:
    repeating-linear-gradient(180deg,rgba(242,235,221,.022) 0 1px,transparent 1px 4px),
    radial-gradient(120% 80% at 12% -10%,rgba(47,74,58,.55),transparent 58%),
    radial-gradient(90% 70% at 100% 0%,rgba(255,106,26,.07),transparent 60%);
}

h1,h2,h3,h4{
  margin:0 0 .55em;
  font-family:var(--font-display);
  font-weight:700;
  line-height:1.06;
  letter-spacing:-.01em;
  color:var(--bone);
}
h1{font-size:var(--fs-72);font-weight:800}
h2{font-size:var(--fs-44)}
h3{font-size:var(--fs-28)}
h4{font-size:var(--fs-20);letter-spacing:0}

p{margin:0 0 1em;max-width:52em}
p:last-child{margin-bottom:0}

a{color:var(--cyan);text-decoration:none}
a:hover{color:var(--orange)}

ul,ol{margin:0 0 1em;padding-left:1.15em}
li{margin:0 0 .35em}

img,svg,picture,video{display:block;max-width:100%;height:auto}

button{font:inherit;color:inherit}

hr{border:0;height:1px;background:var(--line);margin:0}

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

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

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;
  top:8px;left:8px;
  z-index:120;
  transform:translateY(-180%);
  padding:10px 16px;
  border-radius:var(--r-xs);
  background:var(--orange);
  color:#180A02;
  font-family:var(--font-mono);
  font-size:13px;
  font-weight:600;
  letter-spacing:.02em;
  transition:transform .18s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{transform:translateY(0);color:#180A02}

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

#main-content{
  display:block;
  position:relative;
  z-index:1;
  padding-top:clamp(88px,9vw,106px);
}

.band{position:relative;padding-block:clamp(48px,7vw,96px)}
.band--ink{background:var(--ink)}
.band--char{background:var(--char)}
.band--deep{background:var(--deep)}
.band--moss{background:linear-gradient(180deg,var(--moss),var(--deep))}

.prose{max-width:44em}
.prose p{font-size:16px;line-height:1.85;color:var(--bone-80)}

.rule{height:1px;border:0;margin:clamp(22px,4vw,44px) 0;background:var(--line)}

.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}

.span-4{grid-column:span 4}
.span-5{grid-column:span 5}
.span-6{grid-column:span 6}
.span-7{grid-column:span 7}
.span-8{grid-column:span 8}
.span-12{grid-column:span 12}

@media (max-width:1023px){
  .grid--3,.grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .span-4,.span-5,.span-6,.span-7,.span-8{grid-column:span 12}
}
@media (max-width:640px){
  .grid--2,.grid--3,.grid--4{grid-template-columns:minmax(0,1fr)}
}

/* ---------- 文本与索引组件 ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin:0 0 16px;
  font-family:var(--font-mono);
  font-size:10.5px;
  font-weight:500;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--stone);
}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--orange)}

.num{
  font-family:var(--font-mono);
  font-weight:700;
  letter-spacing:-.02em;
  font-variant-numeric:tabular-nums;
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 9px;
  border:1px solid var(--line-2);
  border-radius:var(--r-xs);
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--bone-60);
}
.tag--orange{color:var(--orange);border-color:rgba(255,106,26,.5);background:var(--orange-12)}
.tag--cyan{color:var(--cyan);border-color:rgba(53,230,210,.45);background:var(--cyan-14)}
.tag--clay{color:#E5A88F;border-color:rgba(169,86,59,.6);background:rgba(169,86,59,.16)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 20px;
  border:1px solid transparent;
  border-radius:var(--r-xs);
  font-family:var(--font-body);
  font-size:14px;
  font-weight:600;
  letter-spacing:.02em;
  line-height:1.2;
  text-decoration:none;
  cursor:pointer;
  transition:background .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease);
}
.btn--primary{background:var(--orange);border-color:var(--orange);color:#180A02}
.btn--primary:hover,.btn--primary:focus-visible{background:var(--cyan);border-color:var(--cyan);color:var(--ink)}
.btn--ghost{background:transparent;border-color:var(--line-2);color:var(--bone)}
.btn--ghost:hover,.btn--ghost:focus-visible{border-color:var(--cyan);color:var(--cyan)}
.btn--sm{padding:9px 15px;font-size:12.5px;border-radius:var(--r-pill)}
.btn--block{display:flex;width:100%}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  margin:0 0 clamp(18px,3vw,30px);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.06em;
  color:var(--stone);
}
.breadcrumb ol{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin:0;
  padding:0;
  list-style:none;
}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px;margin:0}
.breadcrumb li + li::before{content:"/";color:var(--moss)}
.breadcrumb a{color:var(--bone-60)}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb [aria-current="page"]{color:var(--bone)}

/* ---------- 图片占位容器 ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  isolation:isolate;
  border:1px solid var(--line);
  border-radius:var(--r-xs);
  background:var(--deep);
}
.media-frame img,
.media-frame picture > img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:1;
  pointer-events:none;
  background:linear-gradient(180deg,transparent 52%,rgba(11,31,26,.78));
}
.media-frame--wide{aspect-ratio:16/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}
.media-frame--banner{aspect-ratio:21/9}
.media-frame--empty{
  background-image:repeating-linear-gradient(135deg,rgba(47,74,58,.55) 0 1px,transparent 1px 12px);
}
.media-frame__tag{
  position:absolute;
  left:0;bottom:0;
  z-index:2;
  padding:8px 12px;
  background:rgba(17,20,23,.86);
  border-top:1px solid var(--line-2);
  border-right:1px solid var(--line-2);
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--bone-80);
}
.media-frame__corner{
  position:absolute;
  top:0;right:0;
  z-index:2;
  width:26px;height:26px;
  border-left:1px solid rgba(53,230,210,.6);
  border-bottom:1px solid rgba(53,230,210,.6);
  background:linear-gradient(225deg,rgba(255,106,26,.38),transparent 62%);
}

/* ---------- 显现（页面阶段可选） ---------- */
[data-reveal]{transition:opacity .3s var(--ease),transform .3s var(--ease)}
.has-js [data-reveal]:not(.is-revealed){opacity:0;transform:translateY(16px)}

/* =========================================================
   头部
   ========================================================= */
.site-header{
  position:fixed;
  inset:0 0 auto 0;
  z-index:80;
  padding:12px var(--gutter) 0;
  transition:padding .24s var(--ease);
}
.site-header[data-scrolled]{padding-top:8px}

.scroll-rail{
  position:fixed;
  top:0;left:0;right:0;
  height:2px;
  z-index:100;
  background:rgba(242,235,221,.06);
  pointer-events:none;
}
.scroll-rail__bar{
  display:block;
  height:100%;
  width:0;
  background:linear-gradient(90deg,var(--clay),var(--orange) 55%,var(--cyan));
  transition:width .1s linear;
}

.header-shell{
  position:relative;
  display:flex;
  align-items:center;
  gap:clamp(10px,1.6vw,22px);
  max-width:var(--shell);
  height:var(--header-h);
  margin-inline:auto;
  padding:0 8px 0 16px;
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  background:rgba(17,20,23,.84);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  box-shadow:0 22px 46px -32px rgba(0,0,0,.95),inset 0 1px 0 rgba(242,235,221,.05);
  transition:height .24s var(--ease),background .24s var(--ease),border-color .24s var(--ease),border-radius .24s var(--ease);
}
.site-header[data-scrolled] .header-shell{
  height:54px;
  background:rgba(11,31,26,.95);
  border-color:var(--line-2);
}

/* 品牌锁定 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  padding:4px 0;
  color:var(--bone);
  text-decoration:none;
}
.brand__mark{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  align-items:end;
  gap:3px;
  width:26px;height:26px;
  padding:4px;
  border:1px solid var(--line-2);
  border-radius:3px;
  background:rgba(47,74,58,.35);
}
.brand__mark i{display:block;width:100%;background:var(--orange);border-radius:1px}
.brand__mark i:nth-child(1){height:100%}
.brand__mark i:nth-child(2){height:62%;background:var(--cyan)}
.brand__mark i:nth-child(3){height:82%;background:var(--clay)}
.brand__type{display:flex;flex-direction:column;line-height:1.06}
.brand__cn{
  font-family:var(--font-display);
  font-size:16px;
  font-weight:700;
  letter-spacing:.05em;
  color:var(--bone);
}
.brand__en{
  font-family:var(--font-mono);
  font-size:9.5px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--stone);
  transition:color .16s var(--ease);
}
.brand:hover .brand__en,.brand:focus-visible .brand__en{color:var(--cyan)}

/* 导航 */
.site-nav{
  display:flex;
  flex:1 1 auto;
  align-items:center;
  justify-content:center;
  min-width:0;
}
.nav-list{
  display:flex;
  align-items:center;
  gap:2px;
  margin:0;
  padding:0;
  list-style:none;
}
.nav-list li{margin:0}
.nav-link{
  display:inline-block;
  padding:8px 12px;
  border-radius:var(--r-pill);
  font-size:13.5px;
  font-weight:500;
  line-height:1.4;
  white-space:nowrap;
  color:var(--bone-60);
  text-decoration:none;
  transition:color .16s var(--ease),background .16s var(--ease);
}
.nav-link:hover{color:var(--bone);background:rgba(47,74,58,.55)}
.nav-link[aria-current="page"]{
  color:var(--ink);
  background:var(--cyan);
  font-weight:600;
}
.nav-link[aria-current="page"]:hover{background:var(--cyan);color:var(--ink)}

.nav-panel-extra{display:none}

/* 右侧工具区 */
.header-tools{
  display:flex;
  align-items:center;
  gap:8px;
  margin-left:auto;
  flex:0 0 auto;
}
.header-cta{flex:0 0 auto}

.auth-wrap{position:relative;display:flex}
.auth-badge{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:7px 12px;
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  background:rgba(22,48,43,.5);
  color:var(--bone-60);
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.08em;
  cursor:pointer;
  transition:color .16s var(--ease),border-color .16s var(--ease),background .16s var(--ease);
}
.auth-badge:hover,
.auth-badge[aria-expanded="true"]{
  color:var(--bone);
  border-color:var(--cyan);
  background:rgba(53,230,210,.10);
}
.auth-badge__dot{
  width:6px;height:6px;
  border-radius:50%;
  background:var(--alert);
  box-shadow:0 0 0 3px rgba(245,196,81,.18);
  animation:auth-pulse 2.8s ease-in-out infinite;
}
@keyframes auth-pulse{
  0%,100%{opacity:1}
  50%{opacity:.32}
}
.auth-badge__label{white-space:nowrap}
.auth-badge__ver{color:var(--cyan);font-weight:600;white-space:nowrap}

.auth-pop{
  position:absolute;
  top:calc(100% + 14px);
  right:0;
  z-index:90;
  width:min(286px,80vw);
  padding:14px 16px 12px;
  border:1px solid var(--line-2);
  border-radius:var(--r-sm);
  background:var(--deep);
  box-shadow:0 28px 54px -24px rgba(0,0,0,.95);
}
.auth-pop[hidden]{display:none}
.auth-pop::before{
  content:"";
  position:absolute;
  top:-6px;right:26px;
  width:10px;height:10px;
  background:var(--deep);
  border-left:1px solid var(--line-2);
  border-top:1px solid var(--line-2);
  transform:rotate(45deg);
}
.auth-pop__title{
  margin:0 0 10px;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--stone);
}
.auth-pop__row{
  display:flex;
  justify-content:space-between;
  gap:12px;
  margin:0 0 6px;
  font-size:12px;
  color:var(--bone-60);
}
.auth-pop__row b{color:var(--bone);font-family:var(--font-mono);font-weight:600}
.auth-pop__note{margin:10px 0 12px;font-size:12px;line-height:1.65;color:var(--stone)}
.auth-pop__link{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.02em;
  color:var(--cyan);
}
.auth-pop__link:hover{color:var(--orange)}

/* 移动展开键 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:7px;
  height:38px;
  padding:0 12px;
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  background:transparent;
  color:var(--bone-80);
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.14em;
  cursor:pointer;
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.nav-toggle:hover,
.nav-toggle[aria-expanded="true"]{color:var(--cyan);border-color:var(--cyan)}
.nav-toggle__bars{
  position:relative;
  display:block;
  width:14px;height:9px;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;right:0;
  height:1.5px;
  background:currentColor;
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.nav-toggle__bars::before{top:0}
.nav-toggle__bars::after{bottom:0}
.site-header[data-open] .nav-toggle__bars::before{transform:translateY(3.75px) rotate(45deg)}
.site-header[data-open] .nav-toggle__bars::after{transform:translateY(-3.75px) rotate(-45deg)}
.nav-toggle__text{text-transform:uppercase}

/* 中等宽度压缩 */
@media (max-width:1120px) and (min-width:1024px){
  .nav-link{padding:8px 9px;font-size:12.5px}
  .header-cta{display:none}
}

/* 移动端浮岛与展开层 */
@media (max-width:1023px){
  .site-header{padding:10px var(--gutter) 0}
  .site-header[data-scrolled]{padding-top:8px}
  .header-shell{
    height:58px;
    padding:0 8px 0 14px;
    border-radius:16px;
  }
  .site-header[data-scrolled] .header-shell{height:54px;border-radius:12px}

  .nav-toggle{display:inline-flex}

  .site-nav{
    position:absolute;
    top:calc(100% + 10px);
    left:-1px;
    right:-1px;
    display:block;
    max-height:calc(100vh - 120px);
    overflow:auto;
    padding:12px;
    border:1px solid var(--line-2);
    border-radius:14px;
    background:rgba(11,31,26,.98);
    -webkit-backdrop-filter:blur(16px);
    backdrop-filter:blur(16px);
    box-shadow:0 34px 64px -30px rgba(0,0,0,.95);
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s linear;
  }
  .site-header[data-open] .site-nav{
    opacity:1;
    visibility:visible;
    transform:translateY(0);
  }

  .nav-list{flex-direction:column;align-items:stretch;gap:2px}
  .nav-link{
    display:block;
    padding:12px 14px;
    border-radius:8px;
    font-size:15px;
    color:var(--bone-80);
  }
  .nav-link[aria-current="page"]{border-radius:8px}

  .nav-panel-extra{
    display:block;
    margin-top:10px;
    padding-top:12px;
    border-top:1px solid var(--line);
  }
  .nav-panel-extra__note{
    margin:0 0 10px;
    font-family:var(--font-mono);
    font-size:10.5px;
    letter-spacing:.06em;
    color:var(--stone);
  }
}

@media (max-width:767px){
  .header-cta{display:none}
  .auth-badge__label{display:none}
}

@media (max-width:420px){
  .nav-toggle__text{display:none}
  .nav-toggle{padding:0 11px}
  .brand__en{display:none}
}

/* =========================================================
   页脚
   ========================================================= */
.site-footer{
  position:relative;
  z-index:1;
  background:var(--char);
  border-top:1px solid var(--line);
  color:var(--bone);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:1px;
  background:linear-gradient(90deg,transparent,var(--orange) 30%,var(--cyan) 70%,transparent);
  opacity:.6;
}
.footer-rule{
  display:flex;
  gap:6px;
  max-width:var(--shell);
  margin-inline:auto;
  padding:6px var(--gutter) 0;
}
.footer-rule span{display:block;height:3px}
.footer-rule span:nth-child(1){flex:3 1 0;background:var(--orange)}
.footer-rule span:nth-child(2){flex:5 1 0;background:var(--moss)}
.footer-rule span:nth-child(3){flex:2 1 0;background:var(--clay)}

.footer-shell{
  position:relative;
  z-index:1;
  padding-top:clamp(36px,5.6vw,72px);
  padding-bottom:clamp(20px,3vw,30px);
}

.footer-grid{
  display:grid;
  grid-template-columns:1.5fr .9fr 1.2fr .9fr;
  gap:clamp(26px,4vw,54px);
  padding-bottom:clamp(30px,5vw,54px);
  border-bottom:1px solid var(--line);
}

.footer-kicker{
  margin:0 0 10px;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.26em;
  text-transform:uppercase;
  color:var(--stone);
}
.footer-mark{
  margin:0 0 12px;
  font-family:var(--font-display);
  font-size:clamp(26px,3.4vw,34px);
  font-weight:800;
  line-height:1;
  letter-spacing:.03em;
  color:var(--bone);
}
.footer-mark::after{
  content:"";
  display:block;
  width:46px;height:2px;
  margin-top:14px;
  background:var(--orange);
}
.footer-summary{
  margin:0 0 18px;
  max-width:34ch;
  font-size:13.5px;
  line-height:1.85;
  color:var(--bone-60);
}

.footer-title{
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:10.5px;
  font-weight:600;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--stone);
}
.footer-list{
  display:flex;
  flex-direction:column;
  gap:9px;
  margin:0;
  padding:0;
  list-style:none;
}
.footer-list li{margin:0}
.footer-list a{
  position:relative;
  display:inline-block;
  padding-left:14px;
  font-size:14px;
  color:var(--bone-80);
  text-decoration:none;
  transition:color .16s var(--ease),padding-left .16s var(--ease);
}
.footer-list a::before{
  content:"";
  position:absolute;
  left:0;top:.72em;
  width:6px;height:1px;
  background:var(--stone);
  transition:background .16s var(--ease),width .16s var(--ease);
}
.footer-list a:hover{color:var(--cyan);padding-left:17px}
.footer-list a:hover::before{background:var(--cyan);width:11px}

.footer-list--data li{display:grid;gap:2px}
.footer-key{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--stone);
}
.footer-val{
  font-size:13px;
  line-height:1.55;
  color:var(--bone-80);
  overflow-wrap:anywhere;
}

.footer-note{
  margin:16px 0 0;
  font-size:12px;
  line-height:1.7;
  color:var(--stone);
}

.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 22px;
  padding-top:clamp(18px,3vw,26px);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.06em;
  color:var(--stone);
}
.footer-copy,.footer-icp,.footer-ver{margin:0}
.footer-ver{margin-left:auto;color:var(--bone-40)}

@media (max-width:1023px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:640px){
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .footer-ver{margin-left:0}
  .footer-summary{max-width:none}
}

/* 返回顶部 */
.to-top{
  position:fixed;
  right:clamp(14px,3vw,32px);
  bottom:clamp(14px,3vw,32px);
  z-index:70;
  display:grid;
  place-items:center;
  width:46px;height:46px;
  padding:0;
  border:1px solid var(--line-2);
  border-radius:var(--r-xs);
  background:var(--deep);
  color:var(--bone);
  font-family:var(--font-mono);
  font-size:16px;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s linear,color .16s var(--ease),border-color .16s var(--ease);
}
.to-top[data-visible]{
  opacity:1;
  visibility:visible;
  transform:translateY(0);
}
.to-top:hover,.to-top:focus-visible{border-color:var(--cyan);color:var(--cyan)}

/* ---------- 降低动态 ---------- */
@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;
  }
  [data-reveal],
  .has-js [data-reveal]:not(.is-revealed){opacity:1!important;transform:none!important}
}