/* ==========================================================================
   九游体育 · 共享站点样式 /assets/site.css
   蓝图网格 · 竞技场数据指挥台
   ========================================================================== */

:root{
  color-scheme: dark;

  --c-red:#E5322D;
  --c-red-bright:#FF4A45;
  --c-navy:#0B1B33;
  --c-midnight:#07101F;
  --c-cyan:#38F2D0;
  --c-orange:#FF8A3D;
  --c-green:#5CE1A4;
  --c-mist:#E8EEF7;
  --c-steel:#6E7F99;
  --c-pale:#A9C7D9;

  --line-1:rgba(169,199,217,.16);
  --line-2:rgba(169,199,217,.30);
  --line-3:rgba(169,199,217,.48);

  --font-sans:"HarmonyOS Sans SC","Noto Sans SC","Source Han Sans SC","思源黑体","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;

  --shell:1180px;
  --pad-x:clamp(16px,4vw,32px);
  --gap:clamp(14px,2.2vw,26px);
  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:.22s;
}

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

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}

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

ul,ol{padding:0;}

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

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

button{
  font:inherit;
  color:inherit;
  background:none;
  border:0;
  padding:0;
  cursor:pointer;
}

[hidden]{display:none !important;}

/* ---------- 基础排版 ---------- */
body{
  min-height:100vh;
  background-color:var(--c-midnight);
  background-image:
    linear-gradient(to right, rgba(169,199,217,.055) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(169,199,217,.055) 1px, transparent 1px);
  background-size:72px 72px;
  color:var(--c-mist);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4{
  font-family:var(--font-sans);
  font-weight:800;
  line-height:1.16;
  letter-spacing:-.012em;
  color:var(--c-mist);
}

h1{font-size:clamp(2rem,4.4vw,3.4rem);}
h2{font-size:clamp(1.4rem,2.6vw,2.05rem);}
h3{font-size:clamp(1.08rem,1.8vw,1.32rem);}

p{color:var(--c-pale);}

strong,b{color:var(--c-mist);font-weight:700;}

::selection{background:var(--c-red);color:#fff;}

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

#main-content{
  display:block;
  scroll-margin-top:96px;
}

.sr-only{
  position:absolute !important;
  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;
}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;
  top:0;
  left:50%;
  z-index:999;
  transform:translate(-50%,-130%);
  padding:10px 22px;
  border-radius:0 0 3px 3px;
  background:var(--c-red);
  color:#fff;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.08em;
  transition:transform var(--dur) var(--ease);
}
.skip-link:focus-visible{
  transform:translate(-50%,0);
  outline-offset:-4px;
}

/* ==========================================================================
   悬浮胶囊头部
   ========================================================================== */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  padding:clamp(10px,1.6vw,16px) var(--pad-x) clamp(6px,1vw,10px);
  background:linear-gradient(180deg,
    rgba(7,16,31,.97) 0%,
    rgba(7,16,31,.88) 52%,
    rgba(7,16,31,0) 100%);
}

.header-island{
  position:relative;
  display:flex;
  align-items:center;
  gap:clamp(8px,1.6vw,22px);
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding:8px 10px 8px 16px;
  background:rgba(11,27,51,.86);
  border:1px solid var(--line-2);
  border-radius:999px;
  box-shadow:
    0 20px 44px -28px rgba(0,0,0,.95),
    inset 0 1px 0 rgba(232,238,247,.07);
  backdrop-filter:blur(16px) saturate(150%);
  -webkit-backdrop-filter:blur(16px) saturate(150%);
  transition:
    padding var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}
.header-island:hover{border-color:var(--line-3);}

.site-header[data-scrolled="true"] .header-island{
  padding-top:5px;
  padding-bottom:5px;
  background:rgba(7,16,31,.92);
  border-color:var(--line-1);
}

/* 品牌 */
.header-brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:none;
  padding-right:4px;
  color:var(--c-mist);
}

.brand-mark{
  position:relative;
  width:26px;
  height:26px;
  flex:none;
  background:var(--c-red);
  clip-path:polygon(0 0,100% 0,100% 64%,64% 100%,0 100%);
}
.brand-mark::after{
  content:"";
  position:absolute;
  left:6px;top:6px;
  width:9px;height:9px;
  border:1.5px solid rgba(255,255,255,.9);
  border-right-color:transparent;
  border-bottom-color:transparent;
}

.brand-text{
  display:flex;
  flex-direction:column;
  min-width:0;
  line-height:1.15;
}
.brand-name{
  font-size:16px;
  font-weight:800;
  letter-spacing:.05em;
  color:var(--c-mist);
}
.brand-line{
  display:block;
  max-height:16px;
  overflow:hidden;
  font-family:var(--font-mono);
  font-size:9.5px;
  letter-spacing:.2em;
  color:var(--c-steel);
  white-space:nowrap;
  transition:opacity var(--dur) var(--ease),max-height var(--dur) var(--ease);
}
.site-header[data-scrolled="true"] .brand-line{
  opacity:0;
  max-height:0;
}

/* 移动开关 */
.nav-toggle{
  display:none;
  margin-left:auto;
  width:42px;
  height:42px;
  flex:none;
  align-items:center;
  justify-content:center;
  border:1px solid var(--line-2);
  border-radius:999px;
  background:rgba(7,16,31,.6);
  color:var(--c-mist);
  transition:
    border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--c-cyan);}
.nav-toggle[aria-expanded="true"]{
  border-color:var(--c-cyan);
  background:rgba(56,242,208,.14);
}

.nav-toggle-bars{
  position:relative;
  display:block;
  width:16px;
  height:12px;
}
.nav-toggle-bars span{
  position:absolute;
  left:0;
  width:100%;
  height:1.5px;
  border-radius:1px;
  background:currentColor;
  transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease);
}
.nav-toggle-bars span:nth-child(1){top:0;}
.nav-toggle-bars span:nth-child(2){top:5px;}
.nav-toggle-bars span:nth-child(3){top:10px;}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1){transform:translateY(5px) 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(-5px) rotate(-45deg);}

/* 导航 */
.header-nav{
  display:flex;
  align-items:center;
  gap:4px;
  margin-left:auto;
  min-width:0;
}

.nav-list{
  display:flex;
  align-items:center;
  gap:2px;
  flex-wrap:nowrap;
  list-style:none;
  margin:0;
  padding:0;
}

.nav-link{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:8px 12px;
  border-radius:999px;
  font-size:13.5px;
  font-weight:500;
  color:var(--c-pale);
  white-space:nowrap;
  transition:
    color var(--dur) var(--ease),
    background-color var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}
.nav-link::before{
  content:"";
  width:5px;
  height:5px;
  flex:none;
  border-radius:50%;
  background:currentColor;
  opacity:.32;
  transition:
    background-color var(--dur) var(--ease),
    opacity var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}
.nav-link:hover{
  color:var(--c-mist);
  background:rgba(56,242,208,.08);
}
.nav-link:hover::before{
  opacity:1;
  background:var(--c-cyan);
}
.nav-link[aria-current="page"]{
  color:var(--c-mist);
  background:rgba(229,50,45,.20);
  box-shadow:inset 0 0 0 1px rgba(229,50,45,.5);
}
.nav-link[aria-current="page"]::before{
  opacity:1;
  background:var(--c-cyan);
  box-shadow:0 0 0 3px rgba(56,242,208,.18);
}

.header-cta{
  margin-left:6px;
  flex:none;
}

/* 平板横屏紧凑态 */
@media (max-width:1180px) and (min-width:1024px){
  .nav-link{font-size:12.5px;padding:7px 9px;}
  .brand-line{display:none;}
  .header-cta{padding:.5em .85em;font-size:.7rem;}
}

/* 移动端 */
@media (max-width:1023px){
  .header-nav{
    position:absolute;
    top:calc(100% + 10px);
    left:0;
    right:0;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:6px;
    margin-left:0;
    padding:12px;
    background:rgba(7,16,31,.98);
    border:1px solid var(--line-2);
    border-radius:22px;
    box-shadow:0 30px 60px -30px rgba(0,0,0,.95);
    backdrop-filter:blur(18px);
    -webkit-backdrop-filter:blur(18px);
  }
  .header-nav[data-open="true"]{display:flex;}

  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:2px;
  }
  .nav-link{
    width:100%;
    padding:12px 14px;
    border-radius:14px;
    font-size:15px;
  }
  .header-cta{
    margin:6px 0 0;
    width:100%;
    justify-content:center;
  }
  .nav-toggle{display:inline-flex;}
}

@media (max-width:420px){
  .header-island{padding:7px 8px 7px 12px;}
  .brand-name{font-size:15px;}
  .brand-line{font-size:9px;letter-spacing:.13em;}
}
@media (max-width:350px){
  .brand-line{display:none;}
}

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer{
  position:relative;
  margin-top:clamp(48px,7vw,100px);
  border-top:1px solid var(--line-2);
  background:var(--c-midnight);
  color:var(--c-pale);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(to right, rgba(169,199,217,.07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(169,199,217,.07) 1px, transparent 1px);
  background-size:56px 56px;
  opacity:.75;
  -webkit-mask-image:linear-gradient(180deg, rgba(0,0,0,.9), transparent 88%);
  mask-image:linear-gradient(180deg, rgba(0,0,0,.9), transparent 88%);
}

.footer-inner{
  position:relative;
  z-index:1;
  max-width:var(--shell);
  margin-inline:auto;
  padding:clamp(30px,5vw,58px) var(--pad-x) clamp(18px,3vw,28px);
}

.footer-top{
  display:grid;
  grid-template-columns:minmax(230px,1fr) 1.9fr;
  gap:clamp(24px,4vw,64px);
}

.footer-brand-col{min-width:0;}

.footer-brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin-bottom:12px;
}
.footer-brand .brand-mark{width:24px;height:24px;}

.footer-brand-name{
  font-size:17px;
  font-weight:800;
  letter-spacing:.05em;
  color:var(--c-mist);
}

.footer-tagline{
  max-width:32ch;
  font-size:14px;
  line-height:1.75;
  color:var(--c-steel);
}

.footer-coords{
  display:flex;
  flex-wrap:wrap;
  gap:6px 14px;
  margin-top:16px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--c-steel);
}
.footer-coord{
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.footer-coord::before{
  content:"";
  width:5px;
  height:5px;
  border-radius:50%;
  background:var(--c-cyan);
  opacity:.8;
}

.footer-cols{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(18px,3vw,36px);
}

.footer-col{min-width:0;}

.footer-col-title{
  display:flex;
  align-items:center;
  gap:8px;
  margin-bottom:14px;
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:600;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--c-cyan);
}
.footer-col-title::before{
  content:"";
  width:14px;
  height:1px;
  flex:none;
  background:var(--c-red);
}

.footer-list{
  display:flex;
  flex-direction:column;
  gap:9px;
  list-style:none;
  margin:0;
  padding:0;
}

.footer-link{
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-size:14px;
  color:var(--c-pale);
  transition:color var(--dur) var(--ease);
}
.footer-link::before{
  content:"";
  width:4px;
  height:4px;
  flex:none;
  border-radius:50%;
  background:var(--c-steel);
  transition:background-color var(--dur) var(--ease);
}
.footer-link:hover{color:var(--c-mist);}
.footer-link:hover::before{background:var(--c-cyan);}

.footer-lines{
  display:flex;
  flex-direction:column;
  gap:8px;
}
.footer-line{
  font-size:13px;
  line-height:1.65;
  color:var(--c-pale);
  word-break:break-word;
}

.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  margin-top:clamp(24px,4vw,44px);
  padding-top:clamp(14px,2vw,20px);
  border-top:1px solid var(--line-1);
}

.footer-legal{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.05em;
  color:var(--c-steel);
}

@media (max-width:900px){
  .footer-top{grid-template-columns:1fr;}
  .footer-tagline{max-width:48ch;}
}
@media (max-width:640px){
  .footer-cols{grid-template-columns:1fr;gap:24px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}

/* ==========================================================================
   通用容器与组件
   ========================================================================== */
.container{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--pad-x);
}
.container--narrow{max-width:880px;}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--c-cyan);
}
.eyebrow::before{
  content:"";
  width:18px;
  height:1px;
  flex:none;
  background:currentColor;
}

.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:12px 24px;
  padding-bottom:14px;
  margin-bottom:clamp(18px,3vw,32px);
  border-bottom:1px solid var(--line-2);
}

.mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.05em;
}

.data-num{
  display:block;
  font-family:var(--font-mono);
  font-weight:700;
  font-size:clamp(2.2rem,5vw,3.6rem);
  line-height:1;
  letter-spacing:-.02em;
  font-variant-numeric:tabular-nums;
  color:var(--c-mist);
}

/* 按钮 */
.btn{
  position:relative;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.55em;
  padding:.78em 1.35em;
  border:1px solid var(--line-2);
  border-radius:2px;
  background:rgba(56,242,208,.05);
  color:var(--c-mist);
  font-family:var(--font-mono);
  font-size:.82rem;
  font-weight:600;
  letter-spacing:.08em;
  text-decoration:none;
  transition:
    background-color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    color var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}
.btn:hover{
  border-color:var(--c-cyan);
  background:rgba(56,242,208,.12);
  color:#fff;
  transform:translateY(-1px);
}
.btn:active{transform:translateY(0);}

.btn-primary{
  background:var(--c-red);
  border-color:var(--c-red);
  color:#fff;
}
.btn-primary:hover{
  background:var(--c-red-bright);
  border-color:var(--c-red-bright);
  color:#fff;
}

.btn-ghost{
  background:transparent;
  border-color:var(--line-2);
  color:var(--c-pale);
}
.btn-ghost:hover{
  color:var(--c-mist);
  border-color:var(--line-3);
  background:rgba(169,199,217,.08);
}

.btn-sm{
  padding:.56em 1em;
  font-size:.72rem;
}

/* 状态标签 */
.tag{
  display:inline-flex;
  align-items:center;
  gap:.45em;
  padding:3px 9px;
  border:1px solid var(--line-2);
  border-radius:2px;
  background:rgba(169,199,217,.06);
  color:var(--c-pale);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.07em;
  white-space:nowrap;
}
.tag::before{
  content:"";
  width:5px;
  height:5px;
  flex:none;
  border-radius:50%;
  background:currentColor;
  opacity:.85;
}
.tag--live{
  color:var(--c-cyan);
  border-color:rgba(56,242,208,.45);
  background:rgba(56,242,208,.09);
}
.tag--ok{
  color:var(--c-green);
  border-color:rgba(92,225,164,.42);
  background:rgba(92,225,164,.09);
}
.tag--alert{
  color:var(--c-orange);
  border-color:rgba(255,138,61,.45);
  background:rgba(255,138,61,.1);
}

/* 面包屑 */
.breadcrumb{
  padding:clamp(14px,2vw,22px) 0 0;
}
.breadcrumb-list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.5em;
  list-style:none;
  margin:0;
  padding:0;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.09em;
  color:var(--c-steel);
}
.breadcrumb-list li{display:inline-flex;align-items:center;}
.breadcrumb-list li + li::before{
  content:"/";
  margin-right:.5em;
  color:var(--c-steel);
  opacity:.7;
}
.breadcrumb-list a{
  color:var(--c-pale);
  transition:color var(--dur) var(--ease);
}
.breadcrumb-list a:hover{color:var(--c-cyan);}

/* 正文长文 */
.prose{
  max-width:70ch;
  font-size:17px;
  line-height:1.8;
  color:var(--c-pale);
}
.prose > * + *{margin-top:1.05em;}
.prose h2{font-size:clamp(1.3rem,2.2vw,1.7rem);}
.prose h3{font-size:1.15rem;}
.prose ul,.prose ol{
  padding-left:1.35em;
  list-style:disc;
}
.prose ol{list-style:decimal;}
.prose li + li{margin-top:.4em;}
.prose a{
  color:var(--c-cyan);
  text-decoration:underline;
  text-underline-offset:3px;
}
.prose code{
  padding:.1em .4em;
  border-radius:2px;
  background:rgba(56,242,208,.08);
  color:var(--c-cyan);
  font-family:var(--font-mono);
  font-size:.92em;
}
.prose blockquote{
  padding-left:16px;
  border-left:2px solid var(--c-red);
  color:var(--c-pale);
}

/* 网格 */
.grid{
  display:grid;
  gap:var(--gap);
}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr));}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr));}

@media (max-width:860px){
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:620px){
  .grid-2,.grid-3{grid-template-columns:1fr;}
}

/* 面板 */
.panel{
  position:relative;
  padding:clamp(16px,2.4vw,26px);
  border:1px solid var(--line-1);
  border-radius:2px;
  background:linear-gradient(180deg, rgba(11,27,51,.94), rgba(11,27,51,.72));
}
.panel::before{
  content:"";
  position:absolute;
  top:-1px;
  left:-1px;
  width:14px;
  height:14px;
  border-top:1px solid var(--c-cyan);
  border-left:1px solid var(--c-cyan);
  pointer-events:none;
}

/* 图片容器基础规则（页面阶段放置图片或内联 SVG） */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  margin:0;
  border:1px solid var(--line-2);
  border-radius:2px;
  background:linear-gradient(135deg, var(--c-navy), var(--c-midnight));
  aspect-ratio:16 / 9;
}
.media-frame > img,
.media-frame > svg,
.media-frame > picture,
.media-frame > picture > img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.media-frame--wide{aspect-ratio:21 / 9;}
.media-frame--square{aspect-ratio:1 / 1;}
.media-frame--tall{aspect-ratio:4 / 5;}
.media-frame figcaption{
  position:absolute;
  left:0;right:0;bottom:0;
  padding:10px 12px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--c-pale);
  background:linear-gradient(0deg, rgba(7,16,31,.94), rgba(7,16,31,0));
}

/* 时间轴 */
.timeline{
  position:relative;
  list-style:none;
  margin:0;
  padding:0;
}
.timeline::before{
  content:"";
  position:absolute;
  left:7px;
  top:6px;
  bottom:6px;
  width:1px;
  background:var(--line-2);
}
.timeline-item{
  position:relative;
  padding-left:32px;
}
.timeline-item + .timeline-item{margin-top:18px;}
.timeline-dot{
  position:absolute;
  left:0;
  top:5px;
  width:15px;
  height:15px;
  border:1px solid var(--c-cyan);
  border-radius:50%;
  background:rgba(56,242,208,.18);
}

/* 分段切换 */
.tabs{display:block;}

.tablist{
  display:flex;
  flex-wrap:wrap;
  gap:2px;
  border-bottom:1px solid var(--line-2);
}

.tab{
  position:relative;
  padding:10px 16px;
  border:1px solid transparent;
  border-bottom:0;
  border-radius:2px 2px 0 0;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.1em;
  color:var(--c-steel);
  transition:
    color var(--dur) var(--ease),
    background-color var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}
.tab:hover{
  color:var(--c-mist);
  background:rgba(56,242,208,.06);
}
.tab[aria-selected="true"]{
  color:var(--c-mist);
  border-color:var(--line-2);
  background:rgba(11,27,51,.92);
}
.tab[aria-selected="true"]::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:2px;
  background:var(--c-red);
}

.tabpanel{
  padding:clamp(16px,2.4vw,26px) 0;
}

/* 返回顶部 / 滚动进度 */
.to-top{
  position:fixed;
  right:clamp(14px,3vw,28px);
  bottom:clamp(14px,3vw,28px);
  z-index:95;
  display:grid;
  place-items:center;
  width:46px;
  height:46px;
  border:1px solid var(--line-2);
  border-radius:50%;
  background:rgba(7,16,31,.92);
  color:var(--c-cyan);
  font-family:var(--font-mono);
  font-size:17px;
  line-height:1;
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:
    opacity var(--dur) var(--ease),
    transform var(--dur) var(--ease),
    visibility var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}
.to-top[data-visible="true"]{
  opacity:1;
  visibility:visible;
  transform:translateY(0);
}
.to-top:hover{
  border-color:var(--c-cyan);
  background:rgba(56,242,208,.14);
}

.scroll-progress{
  position:fixed;
  top:0;
  left:0;
  width:100%;
  height:2px;
  z-index:150;
  pointer-events:none;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg, var(--c-red) 0%, var(--c-cyan) 100%);
  will-change:transform;
}

/* 入场揭示 */
html.js-reveal [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .55s var(--ease), transform .55s var(--ease);
}
html.js-reveal [data-reveal][data-revealed="true"]{
  opacity:1;
  transform:none;
}

/* 减少动态 */
@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.js-reveal [data-reveal]{
    opacity:1;
    transform:none;
  }
  .site-header .header-island,
  .site-header[data-scrolled="true"] .header-island{
    transition:none;
  }
}