/* ============================================================
   18新利 · 共享站点样式 /assets/site.css
   夜间赛场控制室：轨道导航 + 电光青 + 琥珀状态
   ============================================================ */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --ink-forest:#061A14;
  --forest-deep:#0B241C;
  --forest-card:#123328;
  --forest-line:#1F4A3B;
  --electric-cyan:#3BF2D2;
  --cyan-soft:#A9FFF0;
  --amber-gold:#E8B45A;
  --amber-deep:#B07A2E;
  --mist:#D9E8E2;
  --fog:#8AA79D;
  --violet-data:#9A8CFF;
  --white-mint:#F7FFFC;

  --rail-w:272px;
  --content-max:1220px;
  --gutter:20px;

  --radius-s:10px;
  --radius-m:16px;
  --radius-l:24px;
  --radius-organic:26px 26px 26px 8px;

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

  --shadow-card:0 30px 70px -55px #000;
  --shadow-pill:0 16px 38px -26px rgba(59,242,210,.95);
  --ease-out:cubic-bezier(.2,.7,.3,1);
}

/* ---------- 2. reset ---------- */
*,
*::before,
*::after{box-sizing:border-box;}

html{
  -webkit-text-size-adjust:100%;
  scroll-padding-top:96px;
}
@media (prefers-reduced-motion:no-preference){
  html{scroll-behavior:smooth;}
}

body,
h1,h2,h3,h4,h5,
p,ul,ol,li,figure,blockquote,dl,dd,dt,fieldset{margin:0;}

ul,ol{padding-left:1.15em;}

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

button,input,select,textarea{font:inherit;color:inherit;}

a{color:inherit;text-decoration:none;}

table{border-collapse:collapse;width:100%;}

::selection{background:rgba(59,242,210,.28);color:var(--white-mint);}

:where(a,button,[tabindex],summary,input,select,textarea):focus-visible{
  outline:2px solid var(--electric-cyan);
  outline-offset:3px;
  border-radius:6px;
}

/* ---------- 3. 中文排版与页面底色 ---------- */
body{
  min-height:100vh;
  font-family:var(--font-sans);
  font-size:17px;
  font-weight:400;
  line-height:1.85;
  color:var(--mist);
  background-color:var(--ink-forest);
  background-image:
    radial-gradient(1200px 680px at 82% -12%, rgba(59,242,210,.09), transparent 60%),
    radial-gradient(900px 560px at 4% 108%, rgba(232,180,90,.06), transparent 62%);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

@media (min-width:1024px){
  body{padding-left:var(--rail-w);}
}

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:700;
  line-height:1.14;
  letter-spacing:-.01em;
  color:var(--white-mint);
}
h1{font-size:clamp(2.6rem,5vw,5.2rem);line-height:1.03;}
h2{font-size:clamp(1.8rem,3vw,3rem);line-height:1.1;}
h3{font-size:clamp(1.25rem,1.6vw,1.5rem);line-height:1.4;}
h4{font-size:1.05rem;line-height:1.5;letter-spacing:.01em;}

p{max-width:70ch;}

strong,b{font-weight:600;color:var(--white-mint);}

small{font-size:.82rem;}

/* ---------- 4. 通用排版组件 ---------- */
.mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.04em;
}

.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-weight:600;
  letter-spacing:-.01em;
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-family:var(--font-mono);
  font-size:.72rem;
  font-weight:500;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--electric-cyan);
}
.eyebrow::before{
  content:"";
  width:7px;height:7px;
  border-radius:2px;
  background:var(--electric-cyan);
  box-shadow:0 0 0 4px rgba(59,242,210,.14);
  flex:none;
}

.section-title{
  position:relative;
  padding-left:20px;
}
.section-title::before{
  content:"";
  position:absolute;
  left:0;top:.16em;bottom:.16em;
  width:6px;
  border-radius:4px;
  background:linear-gradient(180deg,var(--electric-cyan),rgba(59,242,210,.12));
  transform:scaleY(.32);
  transform-origin:top center;
  opacity:.3;
  transition:transform .28s var(--ease-out),opacity .28s var(--ease-out);
}
[data-section].is-section-active > .section-title::before{
  transform:scaleY(1);
  opacity:1;
}

.lede{
  font-size:clamp(1rem,1.35vw,1.15rem);
  line-height:1.9;
  color:var(--mist);
  max-width:62ch;
}

.footnote{
  font-size:.82rem;
  line-height:1.75;
  color:var(--fog);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 11px;
  border-radius:8px;
  border:1px solid var(--forest-line);
  background:rgba(11,36,28,.7);
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.1em;
  color:var(--fog);
}

.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border-radius:7px;
  font-family:var(--font-mono);
  font-size:.7rem;
  font-weight:500;
  letter-spacing:.12em;
  color:var(--cyan-soft);
  background:rgba(59,242,210,.1);
  border:1px solid rgba(59,242,210,.28);
}
.badge--amber{
  color:var(--amber-gold);
  background:rgba(232,180,90,.1);
  border-color:rgba(232,180,90,.32);
}
.badge--violet{
  color:var(--violet-data);
  background:rgba(154,140,255,.12);
  border-color:rgba(154,140,255,.3);
}

.sr-only{
  position:absolute;
  width:1px;height:1px;
  padding:0;margin:-1px;
  overflow:hidden;
  clip:rect(0 0 0 0);
  clip-path:inset(50%);
  white-space:nowrap;
  border:0;
}

/* ---------- 5. 布局容器与网格 ---------- */
.container{
  width:100%;
  max-width:var(--content-max);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
@media (min-width:1024px){
  :root{--gutter:32px;}
  .container{padding-inline:36px;}
}

.section{
  padding-block:clamp(48px,7vw,96px);
}
.section--tight{
  padding-block:clamp(28px,4vw,52px);
}

.stack{
  display:flex;
  flex-direction:column;
  gap:18px;
}
.cluster{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
}

.grid{
  display:grid;
  gap:18px;
  grid-template-columns:minmax(0,1fr);
}
@media (min-width:680px){
  .grid--2,.grid--3{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (min-width:1040px){
  .grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}
}

.bento{
  display:grid;
  gap:16px;
  grid-template-columns:minmax(0,1fr);
}
@media (min-width:640px){
  .bento{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (min-width:1040px){
  .bento{grid-template-columns:repeat(4,minmax(0,1fr));}
  .bento__cell--span-2{grid-column:span 2;}
  .bento__cell--span-3{grid-column:span 3;}
  .bento__cell--tall{grid-row:span 2;}
}
.bento__cell{
  min-width:0;
  padding:22px;
  border-radius:var(--radius-organic);
  background:linear-gradient(160deg,rgba(18,51,40,.94),rgba(11,36,28,.94));
  border:1px solid var(--forest-line);
  box-shadow:var(--shadow-card);
}

.divider{
  height:1px;
  border:0;
  background:linear-gradient(90deg,transparent,var(--forest-line) 18%,var(--forest-line) 82%,transparent);
  margin-block:clamp(24px,4vw,48px);
}

/* ---------- 6. 卡片 / 胶囊 / 按钮 / 筛选 ---------- */
.card{
  position:relative;
  padding:clamp(20px,2.4vw,28px);
  border-radius:var(--radius-organic);
  background:linear-gradient(160deg,rgba(18,51,40,.95),rgba(11,36,28,.95));
  border:1px solid var(--forest-line);
  box-shadow:var(--shadow-card);
}

.btn,
.pill{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  font-weight:600;
  text-align:center;
  border-radius:999px;
  transition:transform .18s var(--ease-out),background-color .18s var(--ease-out),border-color .18s var(--ease-out),color .18s var(--ease-out);
}

.btn{
  padding:13px 24px;
  font-size:.95rem;
  border:1px solid var(--forest-line);
  background:rgba(18,51,40,.7);
  color:var(--white-mint);
  cursor:pointer;
}
.btn:hover{transform:translateY(-2px);border-color:rgba(59,242,210,.5);}
.btn--primary{
  background:linear-gradient(135deg,var(--electric-cyan),#1FCFB4);
  color:#04140F;
  border-color:transparent;
  box-shadow:var(--shadow-pill);
}
.btn--amber{
  background:linear-gradient(135deg,var(--amber-gold),var(--amber-deep));
  color:#1A1204;
  border-color:transparent;
  box-shadow:0 16px 38px -28px rgba(232,180,90,.95);
}
.btn--ghost{
  background:transparent;
  color:var(--cyan-soft);
  border-color:rgba(59,242,210,.42);
}

.pill{
  padding:9px 15px;
  font-size:.8rem;
  letter-spacing:.02em;
  border:1px solid var(--forest-line);
  background:rgba(18,51,40,.78);
  color:var(--mist);
}
.pill:hover{transform:translateY(-2px);}
.pill--cyan{
  background:linear-gradient(135deg,var(--electric-cyan),#1FD8BC);
  color:#04140F;
  border-color:transparent;
  box-shadow:var(--shadow-pill);
}
.pill--amber{
  background:linear-gradient(135deg,var(--amber-gold),var(--amber-deep));
  color:#1A1204;
  border-color:transparent;
  box-shadow:0 14px 34px -28px rgba(232,180,90,.95);
}
.pill--ghost{
  background:transparent;
  color:var(--cyan-soft);
  border-color:rgba(59,242,210,.4);
}

.chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:7px 14px;
  border-radius:999px;
  border:1px solid var(--forest-line);
  background:rgba(11,36,28,.75);
  color:var(--fog);
  font-family:var(--font-mono);
  font-size:.8rem;
  letter-spacing:.04em;
  cursor:pointer;
  transition:background-color .18s var(--ease-out),color .18s var(--ease-out),border-color .18s var(--ease-out);
}
.chip:hover{color:var(--cyan-soft);border-color:rgba(59,242,210,.45);}
.chip[aria-pressed="true"],
.chip.is-active{
  background:var(--electric-cyan);
  border-color:transparent;
  color:#04140F;
  font-weight:600;
}
.chip--amber[aria-pressed="true"],
.chip--amber.is-active{
  background:var(--amber-gold);
  border-color:transparent;
  color:#1A1204;
}

/* ---------- 7. 面包屑 ---------- */
.breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:.74rem;
  letter-spacing:.08em;
  color:var(--fog);
}
.breadcrumbs__link{color:var(--fog);transition:color .18s var(--ease-out);}
.breadcrumbs__link:hover{color:var(--electric-cyan);}
.breadcrumbs__sep{color:var(--forest-line);}
.breadcrumbs__current{color:var(--cyan-soft);}

/* ---------- 8. 图片容器基础规则 ---------- */
.media{
  position:relative;
  overflow:hidden;
  isolation:isolate;
  border-radius:var(--radius-l);
  border:1px solid var(--forest-line);
  background:
    radial-gradient(120% 120% at 18% 0%, rgba(59,242,210,.2), transparent 62%),
    radial-gradient(90% 120% at 92% 108%, rgba(232,180,90,.16), transparent 60%),
    linear-gradient(160deg,#0E2A22,#061A14);
}
.media::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:1;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(59,242,210,.14) 1px,transparent 1px),
    linear-gradient(90deg,rgba(59,242,210,.14) 1px,transparent 1px);
  background-size:38px 38px;
  opacity:.55;
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.95),transparent 78%);
  mask-image:linear-gradient(180deg,rgba(0,0,0,.95),transparent 78%);
}
.media__img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
  position:relative;
  z-index:0;
}
.media--16x9{aspect-ratio:16/9;}
.media--4x3{aspect-ratio:4/3;}
.media--1x1{aspect-ratio:1/1;}
.media--21x9{aspect-ratio:21/9;}

/* ---------- 9. 跳转链接与阅读进度 ---------- */
.skip-link{
  position:fixed;
  top:10px;
  left:12px;
  z-index:200;
  padding:10px 18px;
  border-radius:999px;
  background:var(--electric-cyan);
  color:#04140F;
  font-weight:600;
  font-size:.9rem;
  transform:translateY(-160%);
  transition:transform .2s var(--ease-out);
}
.skip-link:focus-visible{
  transform:translateY(0);
  outline-offset:2px;
}

.read-progress{
  position:fixed;
  top:0;left:0;right:0;
  height:3px;
  z-index:120;
  background:rgba(31,74,59,.55);
  pointer-events:none;
}
.read-progress__bar{
  display:block;
  height:100%;
  width:0;
  background:linear-gradient(90deg,var(--electric-cyan),var(--amber-gold));
  box-shadow:0 0 14px rgba(59,242,210,.7);
  transition:width .12s linear;
}
@media (min-width:1024px){
  .read-progress{left:var(--rail-w);}
}

/* ---------- 10. 头部：左侧轨道 / 移动端顶栏 ---------- */
.site-header{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--rail-w);
  z-index:80;
  display:flex;
  flex-direction:column;
  gap:20px;
  padding:26px 18px 22px;
  background:linear-gradient(180deg,#0B241C 0%,#08201A 58%,#061A14 100%);
  border-right:1px solid var(--forest-line);
  overflow:hidden;
}
.site-header::before{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:150px;
  pointer-events:none;
  background:linear-gradient(180deg,rgba(232,180,90,0) 0%,rgba(232,180,90,.13) 100%);
  clip-path:polygon(0 46%,100% 0,100% 100%,0 100%);
}
.site-header::after{
  content:"";
  position:absolute;
  top:0;right:0;
  width:1px;height:100%;
  background:linear-gradient(180deg,rgba(59,242,210,.55),rgba(59,242,210,0) 42%,rgba(232,180,90,.4));
  pointer-events:none;
}

.rail-brand{position:relative;z-index:1;flex:none;}

.brand{
  display:flex;
  align-items:center;
  gap:12px;
}
.brand__mark{
  flex:none;
  display:grid;
  place-items:center;
  width:46px;height:46px;
  font-family:var(--font-display);
  font-size:1.15rem;
  font-weight:700;
  letter-spacing:.02em;
  color:#04140F;
  background:linear-gradient(140deg,var(--electric-cyan),#18B79B);
  border-radius:16px 6px 16px 6px;
  box-shadow:0 0 0 1px rgba(59,242,210,.35),0 12px 28px -16px rgba(59,242,210,.95);
}
.brand__text{
  display:flex;
  flex-direction:column;
  gap:3px;
  min-width:0;
}
.brand__name{
  font-family:var(--font-display);
  font-size:1.42rem;
  font-weight:700;
  line-height:1.1;
  letter-spacing:.05em;
  color:var(--white-mint);
}
.brand__tagline{
  font-family:var(--font-mono);
  font-size:.62rem;
  line-height:1.5;
  letter-spacing:.06em;
  color:var(--fog);
}

.rail-nav{
  position:relative;
  z-index:1;
  display:flex;
  flex-direction:column;
  gap:18px;
  flex:1 1 auto;
  min-height:0;
  overflow-y:auto;
  padding-right:4px;
  scrollbar-width:thin;
}
.rail-nav::-webkit-scrollbar{width:5px;}
.rail-nav::-webkit-scrollbar-thumb{background:var(--forest-line);border-radius:999px;}

.rail-nav__list{
  display:flex;
  flex-direction:column;
  gap:3px;
  padding-left:0;
  list-style:none;
}
.rail-nav__item{min-width:0;}
.rail-nav__link{
  display:flex;
  align-items:baseline;
  gap:10px;
  padding:9px 11px;
  border-radius:10px;
  border-left:2px solid transparent;
  color:var(--mist);
  font-size:.94rem;
  line-height:1.4;
  transition:background-color .18s var(--ease-out),color .18s var(--ease-out),border-color .18s var(--ease-out);
}
.rail-nav__index{
  flex:none;
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.08em;
  color:var(--fog);
  transition:color .18s var(--ease-out);
}
.rail-nav__label{min-width:0;}
.rail-nav__link:hover{
  background:rgba(59,242,210,.08);
  color:var(--white-mint);
}
.rail-nav__link:hover .rail-nav__index{color:var(--electric-cyan);}
.rail-nav__link[aria-current="page"]{
  background:linear-gradient(90deg,rgba(59,242,210,.18),rgba(59,242,210,0));
  border-left-color:var(--electric-cyan);
  color:var(--white-mint);
  font-weight:600;
  box-shadow:inset 0 0 0 1px rgba(59,242,210,.16);
}
.rail-nav__link[aria-current="page"] .rail-nav__index{color:var(--electric-cyan);}

.rail-actions{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}

.return-chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  align-self:flex-start;
  padding:8px 12px;
  border-radius:9px;
  border:1px dashed rgba(232,180,90,.45);
  background:rgba(232,180,90,.06);
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.12em;
  color:var(--amber-gold);
  transition:background-color .18s var(--ease-out),border-color .18s var(--ease-out);
}
.return-chip:hover{
  background:rgba(232,180,90,.14);
  border-color:rgba(232,180,90,.8);
}
.return-chip__dot{
  width:6px;height:6px;
  flex:none;
  border-radius:50%;
  background:var(--amber-gold);
  box-shadow:0 0 0 3px rgba(232,180,90,.18);
}

.nav-toggle{display:none;}

.rail-scrim{display:none;}

/* ---------- 11. 头部移动端形态 ---------- */
@media (max-width:1023px){
  .site-header{
    position:sticky;
    top:0;left:auto;right:auto;bottom:auto;
    width:100%;
    height:auto;
    flex-direction:row;
    align-items:center;
    justify-content:space-between;
    gap:12px;
    padding:11px 16px;
    background:rgba(7,28,22,.94);
    border-right:0;
    border-bottom:1px solid var(--forest-line);
    overflow:visible;
    z-index:90;
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
  }
  .site-header::before{height:64px;opacity:.55;}
  .site-header::after{display:none;}

  .brand{gap:10px;}
  .brand__mark{width:36px;height:36px;font-size:.95rem;border-radius:12px 5px 12px 5px;}
  .brand__name{font-size:1.16rem;}
  .brand__tagline{display:none;}

  .nav-toggle{
    position:relative;
    z-index:96;
    display:inline-flex;
    align-items:center;
    gap:9px;
    padding:9px 14px;
    border-radius:999px;
    border:1px solid rgba(59,242,210,.4);
    background:rgba(18,51,40,.88);
    color:var(--cyan-soft);
    font-family:var(--font-mono);
    font-size:.74rem;
    letter-spacing:.14em;
    cursor:pointer;
    transition:border-color .18s var(--ease-out),background-color .18s var(--ease-out);
  }
  .nav-toggle:hover{border-color:var(--electric-cyan);}
  .nav-toggle__bars{
    display:inline-flex;
    flex-direction:column;
    gap:4px;
    width:18px;
    flex:none;
  }
  .nav-toggle__bars span{
    display:block;
    height:2px;
    border-radius:2px;
    background:currentColor;
    transition:transform .2s var(--ease-out),opacity .2s var(--ease-out);
  }
  .nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(6px) rotate(45deg);}
  .nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){opacity:0;}
  .nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

  .rail-nav{
    position:fixed;
    top:0;left:0;bottom:0;
    width:min(322px,86vw);
    flex:none;
    gap:20px;
    padding:88px 18px 28px;
    overflow-y:auto;
    background:linear-gradient(180deg,#0B241C,#061A14);
    border-right:1px solid var(--forest-line);
    box-shadow:34px 0 90px -46px rgba(0,0,0,.95);
    transform:translateX(-103%);
    transition:transform .22s var(--ease-out);
    z-index:95;
  }
  .rail-nav[data-open]{transform:translateX(0);}

  .rail-scrim{
    display:none;
    position:fixed;
    inset:0;
    z-index:92;
    background:rgba(3,14,11,.68);
    backdrop-filter:blur(3px);
    -webkit-backdrop-filter:blur(3px);
  }
  .site-header[data-open] .rail-scrim,
  .rail-scrim.is-open{display:block;}

  body.nav-open{overflow:hidden;}
}

@media (min-width:1024px){
  .rail-scrim{display:none;}
}

/* ---------- 12. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(56px,8vw,104px);
  padding:clamp(40px,6vw,64px) 0 28px;
  overflow:hidden;
  border-top:1px solid var(--forest-line);
  background:linear-gradient(180deg,rgba(11,36,28,0) 0%,#08201A 26%,#061A14 100%);
}
.site-footer::before{
  content:"";
  position:absolute;
  left:38%;right:-16%;bottom:-52%;
  height:340px;
  pointer-events:none;
  background:radial-gradient(closest-side,rgba(59,242,210,.16),transparent 72%);
}
.site-footer::after{
  content:"";
  position:absolute;
  left:0;top:0;
  width:100%;height:1px;
  background:linear-gradient(90deg,rgba(232,180,90,.5),rgba(59,242,210,.35) 45%,transparent);
  pointer-events:none;
}

.footer-inner{position:relative;z-index:1;}

.footer-top{
  display:grid;
  gap:32px;
  padding-bottom:clamp(26px,4vw,38px);
  border-bottom:1px solid var(--forest-line);
}
@media (min-width:720px){
  .footer-top{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-brand{grid-column:1 / -1;}
}
@media (min-width:1040px){
  .footer-top{grid-template-columns:1.5fr 1.15fr 1.1fr;align-items:start;}
  .footer-brand{grid-column:auto;}
}

.footer-brand{
  display:flex;
  flex-direction:column;
  gap:14px;
  align-items:flex-start;
}
.footer-brand__line{
  font-family:var(--font-display);
  font-size:clamp(1.2rem,2vw,1.5rem);
  font-weight:700;
  line-height:1.25;
  letter-spacing:.02em;
  color:var(--white-mint);
  max-width:24ch;
}
.footer-brand__note{
  font-size:.86rem;
  line-height:1.85;
  color:var(--fog);
  max-width:40ch;
}
.footer-brand__return{margin-top:2px;}

.footer-nav{
  display:grid;
  gap:24px;
  grid-template-columns:repeat(2,minmax(0,1fr));
}
@media (max-width:420px){
  .footer-nav{grid-template-columns:minmax(0,1fr);}
}
.footer-nav__group{min-width:0;}
.footer-nav__title{
  display:flex;
  align-items:center;
  gap:8px;
  margin-bottom:12px;
  font-family:var(--font-mono);
  font-size:.7rem;
  font-weight:500;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--fog);
  max-width:none;
}
.footer-nav__title::before{
  content:"";
  width:12px;height:2px;
  flex:none;
  border-radius:2px;
  background:var(--electric-cyan);
}
.footer-nav__list{
  display:flex;
  flex-direction:column;
  gap:9px;
  padding-left:0;
  list-style:none;
}
.footer-nav__link{
  display:inline-block;
  font-size:.92rem;
  line-height:1.6;
  color:var(--mist);
  transition:color .18s var(--ease-out),transform .18s var(--ease-out);
}
.footer-nav__link:hover{
  color:var(--electric-cyan);
  transform:translateX(3px);
}

.footer-contact{min-width:0;}
.footer-contact__title{
  display:flex;
  align-items:center;
  gap:8px;
  margin-bottom:12px;
  font-family:var(--font-mono);
  font-size:.7rem;
  font-weight:500;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--fog);
  max-width:none;
}
.footer-contact__title::before{
  content:"";
  width:12px;height:2px;
  flex:none;
  border-radius:2px;
  background:var(--amber-gold);
}
.footer-contact__list{
  display:grid;
  gap:14px;
}
.footer-contact__item{display:grid;gap:2px;}
.footer-contact__label{
  font-family:var(--font-mono);
  font-size:.66rem;
  letter-spacing:.16em;
  color:var(--fog);
}
.footer-contact__value{
  font-size:.9rem;
  line-height:1.7;
  color:var(--mist);
  overflow-wrap:anywhere;
}

.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 24px;
  padding-top:22px;
}
.footer-legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:.74rem;
  letter-spacing:.06em;
  max-width:none;
}
.footer-legal__link{
  color:var(--mist);
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease-out),border-color .18s var(--ease-out);
}
.footer-legal__link:hover{
  color:var(--electric-cyan);
  border-bottom-color:rgba(59,242,210,.6);
}
.footer-legal__sep{color:var(--forest-line);}
.footer-meta{
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.06em;
  color:var(--fog);
  max-width:none;
}
.footer-meta__icp{color:var(--fog);}

/* ---------- 13. 降低动态效果 ---------- */
@media (prefers-reduced-motion:reduce){
  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .rail-nav{transition:none;}
  .read-progress__bar{transition:none;}
}