/* ============================================================
   i-game-joy.com.cn · 共享站级样式 /assets/site.css
   夜场控制台长卷：深墨蓝底 + 荧光青导航 + 电光紫过渡 + 暖橙费用
   ============================================================ */

:root{
  --ink:#0B1220;
  --ink-2:#131C2E;
  --glass:#1C2740;
  --cyan:#35E0D0;
  --violet:#8B5CF6;
  --orange:#FF8A3D;
  --stone:#8A93A6;
  --bone:#F2EFE9;
  --moss:#6FA88A;
  --clay:#C97B5A;

  --line:rgba(138,147,166,.20);
  --line-strong:rgba(138,147,166,.38);
  --glass-bg:rgba(28,39,64,.58);
  --glass-brd:rgba(53,224,208,.16);

  --font-display:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono","Courier New",monospace;

  --max:1280px;
  --gutter:clamp(16px,4vw,40px);
  --radius-l:22px;
  --radius-m:14px;
  --radius-s:8px;
  --rail-top:152px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --reveal-delay:0ms;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0}
img,svg{max-width:100%;height:auto}
button{font:inherit}
body{
  min-height:100vh;
  overflow-x:hidden;
  background-color:var(--ink);
  background-image:
    radial-gradient(900px 520px at 10% -10%, rgba(53,224,208,.10), transparent 62%),
    radial-gradient(820px 520px at 94% 2%, rgba(139,92,246,.13), transparent 60%),
    linear-gradient(180deg,#0B1220 0%,#0B1220 58%,#0A101B 100%);
  background-repeat:no-repeat;
  color:var(--bone);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

/* ---------- 中文排版 ---------- */
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.12;
  letter-spacing:-.02em;
  color:var(--bone);
}
h1{font-size:clamp(36px,5.4vw,72px)}
h2{font-size:clamp(26px,3.4vw,46px)}
h3{font-size:clamp(20px,2.1vw,28px);line-height:1.25}
h4{font-size:18px;line-height:1.4}
p{margin-bottom:1.05em}
p:last-child{margin-bottom:0}
strong{font-weight:700;color:#fff}
small{font-size:13px}
a{color:var(--cyan);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:#86f4e9}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:4px}
::selection{background:rgba(53,224,208,.28);color:#fff}

/* ---------- skip link ---------- */
.skip-link{
  position:absolute;
  left:16px;
  top:-120px;
  z-index:300;
  padding:11px 20px;
  background:var(--cyan);
  color:#04121a;
  font-size:14px;
  font-weight:700;
  letter-spacing:.04em;
  border-radius:0 0 12px 12px;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:0;color:#04121a}

/* ============================================================
   页头 · 刊头
   ============================================================ */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:linear-gradient(180deg,rgba(11,18,32,.96) 0%,rgba(11,18,32,.84) 100%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid var(--line);
}
.scroll-progress{
  position:absolute;
  left:0;
  bottom:-1px;
  width:100%;
  height:2px;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan) 0%,var(--violet) 58%,var(--orange) 100%);
  transition:transform .12s linear;
  z-index:2;
}

.header-rail{
  max-width:var(--max);
  margin:0 auto;
  padding:9px var(--gutter) 0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.15em;
  color:var(--stone);
  text-transform:uppercase;
}
.header-rail__tag,
.header-rail__note{margin:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.header-rail__note{color:rgba(138,147,166,.75)}
.dot{
  display:inline-block;
  width:6px;
  height:6px;
  margin-right:9px;
  border-radius:50%;
  background:var(--moss);
  box-shadow:0 0 0 3px rgba(111,168,138,.16);
  vertical-align:middle;
  animation:dotPulse 2.8s ease-in-out infinite;
}
@keyframes dotPulse{
  0%,100%{opacity:1;box-shadow:0 0 0 3px rgba(111,168,138,.16)}
  50%{opacity:.42;box-shadow:0 0 0 6px rgba(111,168,138,.06)}
}

.masthead{
  max-width:var(--max);
  margin:0 auto;
  padding:12px var(--gutter) 14px;
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:clamp(8px,2vw,24px);
}
.masthead__side{display:flex;align-items:center;gap:10px;min-width:0}
.masthead__note{
  margin:0;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.14em;
  color:var(--stone);
  white-space:nowrap;
}
.masthead__actions{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:clamp(8px,1.4vw,16px);
}

.brand{
  display:inline-flex;
  flex-direction:column;
  align-items:center;
  gap:4px;
  padding:2px 6px;
  color:var(--bone);
  text-decoration:none;
}
.brand__mark{
  display:block;
  width:9px;
  height:9px;
  margin-bottom:5px;
  background:var(--cyan);
  transform:rotate(45deg);
  box-shadow:0 0 16px rgba(53,224,208,.85);
}
.brand__name{
  font-family:var(--font-display);
  font-size:clamp(20px,2.5vw,30px);
  font-weight:800;
  letter-spacing:-.01em;
  line-height:1;
  color:var(--bone);
  transition:color .2s var(--ease);
}
.brand__sub{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.42em;
  text-indent:.42em;
  color:var(--cyan);
  line-height:1;
}
.brand:hover .brand__name{color:#fff}

.utility-link{
  font-size:13px;
  letter-spacing:.09em;
  color:var(--stone);
  padding:8px 2px;
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
  white-space:nowrap;
}
.utility-link:hover{color:var(--cyan);border-bottom-color:var(--cyan)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:10px 18px;
  border:1px solid transparent;
  border-radius:999px;
  font-size:13.5px;
  font-weight:700;
  letter-spacing:.06em;
  line-height:1.3;
  text-decoration:none;
  cursor:pointer;
  white-space:nowrap;
  transition:transform .18s var(--ease),background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.btn--accent{
  background:var(--orange);
  color:#1A0C04;
  box-shadow:0 8px 24px -12px rgba(255,138,61,.95);
}
.btn--accent:hover{background:#FFA163;color:#1A0C04;transform:translateY(-1px)}
.btn--ghost{
  background:rgba(28,39,64,.55);
  border-color:var(--line-strong);
  color:var(--bone);
}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);transform:translateY(-1px)}

/* ---------- 移动导航按钮 ---------- */
.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:9px 14px;
  background:rgba(28,39,64,.62);
  border:1px solid var(--line-strong);
  border-radius:999px;
  color:var(--bone);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  cursor:pointer;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle__bars{
  position:relative;
  display:block;
  width:16px;
  height:2px;
  background:currentColor;
  box-shadow:0 -5px 0 currentColor,0 5px 0 currentColor;
  transition:box-shadow .2s var(--ease),background-color .2s var(--ease),transform .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{
  background:transparent;
  box-shadow:none;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before,
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  top:0;
  width:16px;
  height:2px;
  background:currentColor;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:rotate(-45deg)}

/* ---------- 栏目导航 ---------- */
.site-nav{
  max-width:var(--max);
  margin:0 auto;
  padding:0 var(--gutter);
}
.site-nav__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:center;
  gap:clamp(4px,2.2vw,26px);
  list-style:none;
  margin:0;
  padding:0;
}
.site-nav__item{list-style:none}
.site-nav__link{
  position:relative;
  display:inline-block;
  padding:12px 4px 14px;
  font-size:13px;
  letter-spacing:.09em;
  color:var(--stone);
  text-decoration:none;
  transition:color .2s var(--ease);
}
.site-nav__link::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:7px;
  height:2px;
  background:linear-gradient(90deg,var(--cyan),var(--violet));
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform .24s var(--ease);
}
.site-nav__link:hover{color:var(--bone)}
.site-nav__link:hover::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{color:var(--cyan)}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1)}
.site-nav__link--fee{color:rgba(255,138,61,.86)}
.site-nav__link--fee:hover{color:var(--orange)}
.site-nav__link--fee::after{background:linear-gradient(90deg,var(--orange),var(--clay))}
.site-nav__link--fee[aria-current="page"]{color:var(--orange)}

/* ============================================================
   页脚
   ============================================================ */
.site-footer{
  position:relative;
  margin-top:clamp(64px,9vw,120px);
  background:linear-gradient(180deg,rgba(19,28,46,.92) 0%,rgba(8,13,23,1) 100%);
  border-top:1px solid var(--line);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:2px;
  background:linear-gradient(90deg,var(--cyan) 0%,var(--violet) 55%,var(--orange) 100%);
  opacity:.9;
}
.footer-brand__word{
  position:absolute;
  left:50%;
  bottom:-.14em;
  transform:translateX(-50%);
  margin:0;
  font-family:var(--font-display);
  font-size:clamp(64px,15vw,190px);
  font-weight:800;
  letter-spacing:-.04em;
  line-height:1;
  white-space:nowrap;
  color:rgba(242,239,233,.035);
  pointer-events:none;
  user-select:none;
  z-index:0;
}
.footer-inner{
  position:relative;
  z-index:1;
  max-width:var(--max);
  margin:0 auto;
  padding:clamp(40px,6vw,72px) var(--gutter) 0;
}
.footer-top{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.75fr);
  gap:clamp(28px,5vw,64px);
  padding-bottom:clamp(28px,4vw,48px);
  border-bottom:1px solid var(--line);
}
.footer-brand{display:flex;flex-direction:column;gap:12px;min-width:0}
.footer-brand__link{
  display:inline-flex;
  flex-direction:column;
  gap:6px;
  color:var(--bone);
  text-decoration:none;
}
.footer-brand__mark{margin-bottom:2px}
.footer-brand__name{
  font-family:var(--font-display);
  font-size:clamp(22px,2.8vw,32px);
  font-weight:800;
  letter-spacing:-.01em;
  line-height:1.1;
}
.footer-brand__sub{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.34em;
  color:var(--cyan);
  line-height:1;
}
.footer-brand__tag{
  max-width:26ch;
  margin:0;
  font-size:14px;
  line-height:1.7;
  color:var(--stone);
}
.footer-cols{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(18px,3vw,40px);
}
.footer-col{min-width:0}
.footer-col__title{
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:600;
  letter-spacing:.2em;
  color:var(--cyan);
  text-transform:uppercase;
}
.footer-list{
  display:flex;
  flex-direction:column;
  gap:9px;
  list-style:none;
  margin:0;
  padding:0;
}
.footer-list__link{
  display:inline-block;
  color:var(--stone);
  font-size:14px;
  letter-spacing:.02em;
  text-decoration:none;
  transition:color .18s var(--ease),transform .18s var(--ease);
}
.footer-list__link:hover{color:var(--bone);transform:translateX(3px)}
.footer-list--contact{gap:11px}
.footer-list__item{
  color:var(--stone);
  font-family:var(--font-mono);
  font-size:12.5px;
  line-height:1.65;
  letter-spacing:.01em;
  overflow-wrap:anywhere;
}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-start;
  justify-content:space-between;
  gap:16px 28px;
  padding:22px 0 28px;
}
.footer-bottom__meta{display:flex;flex-direction:column;gap:8px;min-width:0;max-width:62ch}
.footer-bottom__legal{
  margin:0;
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.7;
  letter-spacing:.02em;
  color:var(--stone);
}
.footer-note{
  margin:0;
  font-size:12.5px;
  line-height:1.7;
  color:rgba(138,147,166,.86);
}
.footer-bottom__links{
  display:flex;
  flex-wrap:wrap;
  gap:8px 18px;
  list-style:none;
  margin:0;
  padding:0;
}
.footer-link{
  font-size:13px;
  letter-spacing:.06em;
  color:var(--stone);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.footer-link:hover{color:var(--cyan);border-bottom-color:rgba(53,224,208,.6)}
.footer-bottom__copy{
  margin:0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:rgba(138,147,166,.7);
  white-space:nowrap;
}

/* ============================================================
   通用布局与组件（供各页面复用）
   ============================================================ */
.container{
  width:100%;
  max-width:var(--max);
  margin:0 auto;
  padding:0 var(--gutter);
}
.section{padding:clamp(40px,7vw,88px) 0}

.layout-rail{
  display:grid;
  grid-template-columns:minmax(0,208px) minmax(0,1fr);
  gap:clamp(20px,3vw,44px);
  align-items:start;
}
.index-rail{
  position:sticky;
  top:var(--rail-top);
  display:flex;
  flex-direction:column;
  gap:2px;
  padding-left:14px;
  border-left:1px solid var(--line);
}
.index-rail__label{
  margin-bottom:10px;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.22em;
  color:var(--stone);
  text-transform:uppercase;
}
.index-rail__link{
  display:flex;
  align-items:baseline;
  gap:10px;
  padding:7px 0;
  font-size:13px;
  letter-spacing:.06em;
  color:var(--stone);
  text-decoration:none;
  border-left:2px solid transparent;
  margin-left:-15px;
  padding-left:13px;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.index-rail__link:hover{color:var(--bone)}
.index-rail__link[aria-current="true"]{color:var(--cyan);border-left-color:var(--cyan)}
.index-rail__num{
  font-family:var(--font-mono);
  font-size:11px;
  color:var(--violet);
}

.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid-12{grid-template-columns:repeat(12,minmax(0,1fr))}
.grid-12 > *{grid-column:span 6;min-width:0}
.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}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.24em;
  color:var(--cyan);
  text-transform:uppercase;
}
.eyebrow::before{
  content:"";
  width:26px;
  height:1px;
  background:var(--cyan);
}

.chapter{
  display:flex;
  align-items:baseline;
  gap:16px;
  padding-bottom:14px;
  margin-bottom:clamp(20px,3vw,34px);
  border-bottom:1px solid var(--line);
}
.chapter__num{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.16em;
  color:var(--orange);
  flex:none;
}
.chapter__title{
  margin:0;
  font-size:clamp(24px,3vw,40px);
  line-height:1.15;
}

.prose{
  max-width:64ch;
  font-size:17px;
  line-height:1.78;
  color:rgba(242,239,233,.86);
}
.prose h3{margin:1.7em 0 .5em;color:var(--bone)}
.prose ul,.prose ol{margin:0 0 1.1em 1.1em}
.prose li{margin-bottom:.4em}
.prose strong{color:var(--bone)}

.card{
  padding:clamp(18px,2.4vw,26px);
  background:var(--glass-bg);
  border:1px solid var(--glass-brd);
  border-radius:var(--radius-l);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
}
.card--solid{
  background:var(--ink-2);
  border-color:var(--line);
  -webkit-backdrop-filter:none;
  backdrop-filter:none;
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border-radius:999px;
  border:1px solid rgba(53,224,208,.28);
  background:rgba(53,224,208,.10);
  color:var(--cyan);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  line-height:1.5;
}
.tag--violet{color:#C4B5FD;background:rgba(139,92,246,.14);border-color:rgba(139,92,246,.34)}
.tag--orange{color:var(--orange);background:rgba(255,138,61,.12);border-color:rgba(255,138,61,.32)}
.tag--moss{color:var(--moss);background:rgba(111,168,138,.12);border-color:rgba(111,168,138,.34)}

.metric{display:flex;flex-direction:column;gap:2px}
.metric__num{
  font-family:var(--font-mono);
  font-size:clamp(28px,3vw,40px);
  font-weight:600;
  letter-spacing:.02em;
  line-height:1.1;
  color:var(--orange);
}
.metric__unit{
  font-size:.55em;
  letter-spacing:.15em;
  color:var(--stone);
  margin-left:.15em;
}
.metric__label{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--stone);
}

.breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  list-style:none;
  margin:0 0 clamp(18px,3vw,28px);
  padding:0;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.12em;
  color:var(--stone);
}
.breadcrumbs li{list-style:none}
.breadcrumbs li + li::before{content:"/";margin-right:8px;color:rgba(138,147,166,.55)}
.breadcrumbs a{color:var(--stone)}
.breadcrumbs a:hover{color:var(--cyan)}
.breadcrumbs [aria-current="page"]{color:var(--bone)}

/* ---------- 图像容器基础规则 ---------- */
.media{
  position:relative;
  margin:0;
  aspect-ratio:16 / 10;
  border-radius:var(--radius-l);
  border:1px solid var(--line);
  overflow:hidden;
  background:linear-gradient(150deg,rgba(28,39,64,.9),rgba(11,18,32,.95));
  isolation:isolate;
}
.media__img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(.92) contrast(1.05);
}
.media::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:1;
  pointer-events:none;
  background:linear-gradient(180deg,rgba(11,18,32,0) 42%,rgba(11,18,32,.74) 100%);
}
.media__caption{
  position:absolute;
  left:18px;
  right:18px;
  bottom:14px;
  z-index:2;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  line-height:1.6;
  color:rgba(242,239,233,.8);
}
.media--wide{aspect-ratio:21 / 9}
.media--tall{aspect-ratio:3 / 4}
.media--empty{
  background-image:
    linear-gradient(rgba(53,224,208,.07) 1px,transparent 1px),
    linear-gradient(90deg,rgba(53,224,208,.07) 1px,transparent 1px),
    radial-gradient(120% 90% at 18% 0%,rgba(139,92,246,.24),transparent 62%),
    linear-gradient(160deg,#131C2E,#0B1220);
  background-size:28px 28px,28px 28px,auto,auto;
}

/* ---------- 滚动显现 ---------- */
html.has-js [data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .28s var(--ease) var(--reveal-delay,0ms),transform .28s var(--ease) var(--reveal-delay,0ms);
}
html.has-js [data-reveal].is-revealed{
  opacity:1;
  transform:none;
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1100px){
  .masthead__note{display:none}
}

@media (max-width:900px){
  :root{--rail-top:104px}

  .header-rail{padding-top:8px;font-size:10.5px;letter-spacing:.1em}
  .header-rail__note{display:none}

  .masthead{
    grid-template-columns:1fr auto;
    padding:10px var(--gutter) 12px;
  }
  .masthead__side{display:none}
  .brand{align-items:flex-start;padding-left:0}
  .brand__mark{margin-bottom:4px}
  .masthead__actions{gap:8px}
  .utility-link{display:none}
  .nav-toggle{display:inline-flex}

  .site-nav{
    display:none;
    padding:6px var(--gutter) 18px;
    background:rgba(9,15,26,.985);
    border-top:1px solid var(--line);
  }
  .site-nav[data-open]{display:block;animation:navIn .22s var(--ease)}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .site-nav__item{border-bottom:1px solid var(--line)}
  .site-nav__item:last-child{border-bottom:0}
  .site-nav__link{
    display:block;
    padding:15px 6px;
    font-size:14.5px;
    letter-spacing:.1em;
  }
  .site-nav__link::after{
    left:6px;
    right:auto;
    bottom:11px;
    width:22px;
  }

  .layout-rail{grid-template-columns:1fr}
  .index-rail{
    position:static;
    flex-direction:row;
    flex-wrap:wrap;
    gap:6px 10px;
    padding:0 0 12px;
    border-left:0;
    border-bottom:1px solid var(--line);
  }
  .index-rail__label{width:100%;margin-bottom:2px}
  .index-rail__link{
    margin-left:0;
    padding:4px 10px;
    border-left:0;
    border-radius:999px;
    border:1px solid var(--line);
    font-size:12px;
  }
  .index-rail__link[aria-current="true"]{border-color:var(--cyan)}

  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr))}
  .grid-12 > *,.span-4,.span-5,.span-6,.span-7,.span-8{grid-column:span 6}
  .span-12{grid-column:span 6}

  .footer-top{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .footer-bottom__copy{white-space:normal}
}

@keyframes navIn{
  from{opacity:0;transform:translateY(-8px)}
  to{opacity:1;transform:none}
}

@media (max-width:680px){
  body{font-size:16px}
  .footer-cols{grid-template-columns:1fr;gap:24px}
  .footer-brand__word{opacity:.7}
  .media,.media--wide{aspect-ratio:4 / 3}
  .media--tall{aspect-ratio:4 / 5}
  .footer-bottom{padding-bottom:24px}
}

@media (max-width:480px){
  .btn{padding:9px 14px;font-size:12.5px;letter-spacing:.04em}
  .brand__name{font-size:19px}
  .nav-toggle__label{display:none}
  .grid-12{grid-template-columns:1fr}
  .grid-12 > *,.span-4,.span-5,.span-6,.span-7,.span-8,.span-12{grid-column:span 1}
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,
  *::before,
  *::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }
  html.has-js [data-reveal]{
    opacity:1;
    transform:none;
    transition:opacity .01ms linear;
  }
  .dot{animation:none}
  .scroll-progress{transition:none}
}