/* ============================================================
   /assets/site.css — 新宝体育站 共享外壳与基础组件
   视觉母题：竞技场账本 / ARENA LEDGER
   ============================================================ */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after{box-sizing:border-box;}

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

body,
h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,blockquote,dl,dd,fieldset{
  margin:0;
}

ul,ol{
  padding:0;
  list-style:none;
}

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

button{
  font:inherit;
  color:inherit;
}

/* ---------- 2. Tokens ---------- */
:root{
  --space:#0B1F3A;
  --space-deep:#071427;
  --midnight:#102C4F;
  --graphite:#2A2E35;
  --cyan:#00E5FF;
  --orange:#FF6B35;
  --white:#F5F7FA;
  --paper:#F2E9D8;
  --mist:#8FA1B8;
  --ice:#A8FFE9;

  --hair:rgba(143,161,184,.22);
  --hair-strong:rgba(143,161,184,.42);
  --cyan-soft:rgba(0,229,255,.14);
  --orange-soft:rgba(255,107,53,.16);

  --font-sans:"Inter","Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"Roboto Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,"Courier New",monospace;

  --container:1180px;
  --gutter:clamp(1rem,4vw,2.5rem);
  --radius:2px;
  --ease:cubic-bezier(.2,.7,.3,1);
}

/* ---------- 3. 中文排版与全局基调 ---------- */
body{
  background:var(--space);
  color:var(--white);
  font-family:var(--font-sans);
  font-size:clamp(16px,.55vw + 15px,17px);
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}

h1,h2,h3,h4,h5,h6{
  font-weight:800;
  line-height:1.12;
  letter-spacing:-.01em;
  color:var(--white);
}

h1{font-size:clamp(2.4rem,5vw,4.6rem);line-height:1.05;letter-spacing:-.02em;}
h2{font-size:clamp(1.8rem,3.2vw,2.9rem);}
h3{font-size:clamp(1.15rem,1.6vw,1.45rem);font-weight:700;line-height:1.35;}

p{max-width:68ch;}

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

strong{font-weight:700;color:var(--white);}

::selection{background:var(--orange);color:var(--space-deep);}

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

main{display:block;}
#main-content{min-height:50vh;}
[id]{scroll-margin-top:1.5rem;}

/* ---------- 4. 布局基础 ---------- */
.container{
  width:min(calc(100% - var(--gutter) * 2),var(--container));
  margin-inline:auto;
}

.section{
  position:relative;
  padding-block:clamp(2.75rem,6vw,5.5rem);
}

.section--deep{background:var(--space-deep);}
.section--midnight{background:var(--midnight);}

.section--paper{
  background:var(--paper);
  color:var(--space-deep);
}
.section--paper h1,
.section--paper h2,
.section--paper h3,
.section--paper h4,
.section--paper strong{color:var(--space-deep);}
.section--paper a{color:#0B4A66;}
.section--paper a:hover{color:#071E2B;}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:.6rem;
  max-width:none;
  font:500 11px/1 var(--font-mono);
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cyan);
}
.eyebrow::before{
  content:"";
  width:22px;
  height:1px;
  background:currentColor;
  flex:none;
}
.section--paper .eyebrow{color:#0E5C7A;}

.lede{
  font-size:clamp(1rem,1.2vw,1.12rem);
  line-height:1.8;
  color:var(--mist);
  max-width:60ch;
}
.section--paper .lede{color:rgba(11,31,58,.78);}

.grid{
  display:grid;
  gap:clamp(1rem,2vw,1.5rem);
}
.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(0,1.5fr) minmax(0,.9fr);align-items:start;}

/* ---------- 5. 基础组件 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.55rem;
  padding:.85rem 1.4rem;
  border:1px solid transparent;
  border-radius:var(--radius);
  font:600 .95rem/1 var(--font-sans);
  letter-spacing:.04em;
  text-decoration:none;
  cursor:pointer;
  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--primary{
  background:var(--orange);
  border-color:var(--orange);
  color:#150800;
}
.btn--primary:hover{
  background:#FF8155;
  color:#150800;
  transform:translateY(-2px);
  box-shadow:0 14px 28px -20px rgba(255,107,53,.95);
}
.btn--ghost{
  background:transparent;
  border-color:rgba(0,229,255,.5);
  color:var(--ice);
}
.btn--ghost:hover{
  background:var(--cyan-soft);
  border-color:var(--cyan);
  color:#FFFFFF;
  transform:translateY(-2px);
}

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.35rem .55rem;
  font:500 10.5px/1.6 var(--font-mono);
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--mist);
}
.breadcrumb li{display:inline-flex;align-items:center;gap:.55rem;}
.breadcrumb li + li::before{content:"/";color:rgba(143,161,184,.5);}
.breadcrumb a{color:var(--mist);transition:color .18s var(--ease);}
.breadcrumb a:hover{color:var(--cyan);}
.breadcrumb [aria-current="page"]{color:var(--ice);}

.card{
  position:relative;
  background:var(--midnight);
  border:1px solid var(--hair);
  border-radius:var(--radius);
  padding:clamp(1.1rem,2vw,1.6rem);
  transition:border-color .2s var(--ease),transform .2s var(--ease),background-color .2s var(--ease);
}
.card:hover{
  border-color:rgba(0,229,255,.55);
  transform:translateY(-3px);
}
.card__title{font-size:1.06rem;font-weight:700;line-height:1.45;color:var(--white);}
.card__meta{
  font:500 10.5px/1.6 var(--font-mono);
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--mist);
}
.card__text{
  color:rgba(245,247,250,.78);
  font-size:.95rem;
  line-height:1.75;
  max-width:56ch;
}
.card--paper{
  background:var(--paper);
  border-color:rgba(11,31,58,.18);
  color:var(--space-deep);
}
.card--paper .card__title{color:var(--space-deep);}
.card--paper .card__meta{color:rgba(11,31,58,.6);}
.card--paper .card__text{color:rgba(11,31,58,.78);}

/* 图像占位容器：页面阶段放入 <img> 或留空显示网格渐变 */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  aspect-ratio:16 / 9;
  border:1px solid var(--hair);
  border-radius:var(--radius);
  background:
    radial-gradient(120% 120% at 18% 0%,rgba(0,229,255,.18),transparent 55%),
    radial-gradient(120% 120% at 92% 100%,rgba(255,107,53,.16),transparent 60%),
    var(--midnight);
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(143,161,184,.14) 1px,transparent 1px),
    linear-gradient(90deg,rgba(143,161,184,.14) 1px,transparent 1px);
  background-size:32px 32px;
  opacity:.6;
}
.media-frame img{
  position:relative;
  z-index:1;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame--square{aspect-ratio:1 / 1;}
.media-frame--wide{aspect-ratio:21 / 9;}
.media-frame--tall{aspect-ratio:4 / 5;}
.media-frame__caption{
  margin-top:.55rem;
  font:500 10.5px/1.6 var(--font-mono);
  letter-spacing:.1em;
  color:var(--mist);
}

.data-num{
  display:block;
  font-family:var(--font-mono);
  font-weight:500;
  font-size:clamp(1.9rem,4vw,3.2rem);
  line-height:1;
  letter-spacing:-.01em;
  color:var(--cyan);
}
.data-num--hot{color:var(--orange);}

.tag{
  display:inline-flex;
  align-items:center;
  gap:.35rem;
  padding:.3rem .55rem;
  border:1px solid var(--hair-strong);
  border-radius:var(--radius);
  font:500 10px/1 var(--font-mono);
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--ice);
}
.tag--cyan{border-color:rgba(0,229,255,.55);color:var(--cyan);}
.tag--hot{border-color:rgba(255,107,53,.6);color:var(--orange);}

.rule{
  height:1px;
  border:0;
  background:var(--hair);
  margin-block:clamp(1.25rem,3vw,2rem);
}

/* ---------- 6. 页头 · 跳转链接 ---------- */
.skip-link{
  position:absolute;
  top:-4rem;
  left:1rem;
  z-index:200;
  padding:.65rem 1.1rem;
  background:var(--paper);
  color:var(--space-deep);
  font:700 .85rem/1 var(--font-sans);
  letter-spacing:.06em;
  border-radius:var(--radius);
  transition:top .2s var(--ease);
}
.skip-link:focus{top:.75rem;color:var(--space-deep);}

/* ---------- 7. 页头 · 外壳 ---------- */
.site-header{
  position:relative;
  z-index:70;
  background:var(--space);
  color:var(--white);
}

.scroll-progress{
  position:fixed;
  top:0;
  left:0;
  right:0;
  height:2px;
  z-index:120;
  pointer-events:none;
  background:linear-gradient(90deg,var(--cyan),var(--ice) 46%,var(--orange));
  transform:scaleX(0);
  transform-origin:0 50%;
}

/* ---------- 8. 页头 · 数据条 ---------- */
.topline{
  background:var(--graphite);
  border-bottom:1px solid rgba(0,229,255,.18);
}
.topline__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1rem;
  min-height:38px;
  padding-block:.35rem;
}
.topline__meta{
  display:inline-flex;
  align-items:center;
  gap:.55rem;
  max-width:none;
  font:500 11px/1.4 var(--font-mono);
  letter-spacing:.13em;
  text-transform:uppercase;
  color:var(--mist);
}
.topline__meta--mid{color:rgba(168,255,233,.78);}
.topline__pulse{
  width:6px;
  height:6px;
  flex:none;
  background:var(--orange);
  box-shadow:0 0 0 3px rgba(255,107,53,.18);
}
.topline__tools{
  display:flex;
  align-items:center;
  gap:.85rem;
}

.status-chip{
  display:inline-flex;
  align-items:center;
  gap:.45rem;
  padding:.32rem .7rem;
  border:1px solid rgba(0,229,255,.4);
  border-radius:999px;
  color:var(--ice);
  font:500 10.5px/1 var(--font-mono);
  letter-spacing:.1em;
  white-space:nowrap;
  transition:border-color .2s var(--ease),background-color .2s var(--ease),color .2s var(--ease);
}
.status-chip:hover,
.status-chip:focus-visible{
  border-color:var(--cyan);
  background:var(--cyan-soft);
  color:#FFFFFF;
}
.status-chip__dot{
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 0 3px rgba(0,229,255,.18);
  flex:none;
}

.search-trigger{
  display:inline-flex;
  align-items:center;
  gap:.45rem;
  padding:.32rem .1rem;
  background:none;
  border:0;
  border-bottom:1px solid rgba(143,161,184,.4);
  color:var(--white);
  font:500 11px/1 var(--font-mono);
  letter-spacing:.12em;
  cursor:pointer;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.search-trigger:hover,
.search-trigger:focus-visible{
  color:var(--cyan);
  border-bottom-color:var(--cyan);
}
.search-trigger[aria-expanded="true"]{
  color:var(--orange);
  border-bottom-color:var(--orange);
}
.search-trigger__glyph{
  position:relative;
  width:11px;
  height:11px;
  flex:none;
  border:1.5px solid currentColor;
  border-radius:50%;
}
.search-trigger__glyph::after{
  content:"";
  position:absolute;
  right:-3px;
  bottom:-3px;
  width:6px;
  height:1.5px;
  background:currentColor;
  transform:rotate(45deg);
}

/* ---------- 9. 页头 · 居中刊头 ---------- */
.masthead{
  position:relative;
  overflow:hidden;
  padding:clamp(1.35rem,3vw,2.1rem) 0 clamp(1.15rem,2.6vw,1.75rem);
  background:
    radial-gradient(120% 170% at 50% -55%,rgba(0,229,255,.18),rgba(11,31,58,0) 62%),
    var(--space);
}
.masthead::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(143,161,184,.09) 1px,transparent 1px),
    linear-gradient(90deg,rgba(143,161,184,.09) 1px,transparent 1px);
  background-size:48px 48px;
  -webkit-mask-image:radial-gradient(72% 100% at 50% 0,#000 0%,transparent 78%);
  mask-image:radial-gradient(72% 100% at 50% 0,#000 0%,transparent 78%);
}
.masthead__inner{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:center;
  gap:clamp(1rem,3vw,2.5rem);
}
.masthead__inner::before,
.masthead__inner::after{
  content:"";
  flex:1 1 0;
  min-width:0;
  height:1px;
  background:linear-gradient(90deg,transparent,var(--hair-strong));
}
.masthead__inner::after{
  background:linear-gradient(270deg,transparent,var(--hair-strong));
}

.brandmark{
  display:inline-flex;
  align-items:center;
  gap:.85rem;
  flex:none;
  color:var(--white);
  text-decoration:none;
}
.brandmark:hover{color:var(--white);}
.brandmark__glyph{
  width:clamp(34px,4vw,42px);
  height:clamp(34px,4vw,42px);
  flex:none;
  background-image:
    linear-gradient(140deg,var(--cyan) 0 46%,transparent 46%),
    linear-gradient(320deg,var(--orange) 0 44%,transparent 44%),
    linear-gradient(180deg,var(--midnight),var(--midnight));
  clip-path:polygon(0 0,100% 0,100% 66%,66% 100%,0 100%);
  transition:transform .25s var(--ease),filter .25s var(--ease);
}
.brandmark:hover .brandmark__glyph,
.brandmark:focus-visible .brandmark__glyph{
  transform:rotate(-4deg) scale(1.04);
  filter:drop-shadow(0 0 10px rgba(0,229,255,.4));
}
.brandmark__text{display:block;}
.brandmark__word{
  display:block;
  font:800 clamp(1.45rem,3.2vw,2rem)/1.02 var(--font-sans);
  letter-spacing:.09em;
  color:var(--white);
}
.brandmark__sub{
  display:block;
  margin-top:.4rem;
  font:500 10px/1 var(--font-mono);
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--mist);
}

/* ---------- 10. 页头 · 章节索引带 ---------- */
.navband{
  position:relative;
  background:var(--midnight);
  border-top:1px solid rgba(0,229,255,.28);
  border-bottom:1px solid var(--hair);
}
.navband__inner{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:center;
}
.navband__label{
  display:none;
  max-width:none;
  font:500 10.5px/1 var(--font-mono);
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--mist);
}

.site-nav{display:flex;justify-content:center;}
.site-nav__list{
  display:flex;
  flex-wrap:wrap;
  align-items:stretch;
  justify-content:center;
}
.site-nav__item{display:flex;}
.site-nav__item + .site-nav__item{border-left:1px solid rgba(143,161,184,.16);}
.site-nav__link{
  position:relative;
  display:inline-flex;
  align-items:baseline;
  gap:.45rem;
  padding:.95rem clamp(.7rem,2vw,1.25rem);
  color:var(--white);
  font-size:.95rem;
  font-weight:500;
  letter-spacing:.02em;
  text-decoration:none;
  transition:color .2s var(--ease);
}
.site-nav__link:hover,
.site-nav__link:focus-visible{color:var(--ice);}
.site-nav__num{
  font:500 10px/1 var(--font-mono);
  letter-spacing:.08em;
  color:var(--mist);
  transition:color .2s var(--ease);
}
.site-nav__link:hover .site-nav__num{color:var(--orange);}
.site-nav__link::after{
  content:"";
  position:absolute;
  left:clamp(.7rem,2vw,1.25rem);
  right:clamp(.7rem,2vw,1.25rem);
  bottom:.45rem;
  height:2px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .25s var(--ease),background-color .2s var(--ease);
}
.site-nav__link:hover::after,
.site-nav__link:focus-visible::after{transform:scaleX(1);}
.site-nav__link[aria-current="page"]{color:var(--cyan);}
.site-nav__link[aria-current="page"]::after{
  transform:scaleX(1);
  background:var(--orange);
}
.site-nav__link[aria-current="page"] .site-nav__num{color:var(--orange);}

.nav-toggle{
  display:none;
  align-items:center;
  gap:.55rem;
  padding:.5rem .75rem;
  background:rgba(11,31,58,.6);
  border:1px solid rgba(0,229,255,.35);
  border-radius:var(--radius);
  color:var(--ice);
  font:500 11px/1 var(--font-mono);
  letter-spacing:.16em;
  cursor:pointer;
  transition:border-color .2s var(--ease),color .2s var(--ease),background-color .2s var(--ease);
}
.nav-toggle:hover,
.nav-toggle:focus-visible{
  border-color:var(--cyan);
  color:#FFFFFF;
}
.nav-toggle[aria-expanded="true"]{
  color:var(--orange);
  border-color:rgba(255,107,53,.6);
}
.nav-toggle__bars{
  display:inline-flex;
  flex-direction:column;
  justify-content:center;
  gap:4px;
  width:15px;
  flex:none;
}
.nav-toggle__bars span{
  display:block;
  height:2px;
  background:currentColor;
  transition:transform .22s var(--ease),opacity .22s var(--ease);
}
.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);}
.nav-toggle__text{white-space:nowrap;}

/* ---------- 11. 页头 · 纸感检索抽屉 ---------- */
.search-panel{
  position:relative;
  background:var(--paper);
  color:var(--space-deep);
  border-bottom:1px solid rgba(11,31,58,.25);
  box-shadow:0 18px 40px -30px rgba(0,0,0,.85);
}
.search-panel[hidden]{display:none;}
.search-panel__inner{padding:1.25rem 0 1.5rem;}

.search-field{
  display:flex;
  align-items:center;
  gap:.75rem;
  padding-bottom:.55rem;
  border-bottom:2px solid var(--space-deep);
  transition:border-color .2s var(--ease);
}
.search-field:focus-within{border-bottom-color:var(--orange);}
.search-field__label{
  flex:none;
  font:500 10.5px/1.4 var(--font-mono);
  letter-spacing:.16em;
  text-transform:uppercase;
  color:rgba(11,31,58,.6);
}
.search-input{
  flex:1 1 auto;
  min-width:0;
  padding:.15rem 0;
  border:0;
  background:transparent;
  color:var(--space-deep);
  font:500 clamp(.95rem,1.5vw,1.08rem)/1.4 var(--font-sans);
}
.search-input:focus{outline:none;}
.search-input::placeholder{color:rgba(11,31,58,.45);}
.search-field__hint{
  flex:none;
  font:500 10px/1 var(--font-mono);
  letter-spacing:.14em;
  color:rgba(11,31,58,.5);
}

.search-index{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(230px,1fr));
  gap:0 1.5rem;
  margin-top:1.1rem;
}
.search-index__item[hidden]{display:none;}
.search-index__link{
  display:flex;
  align-items:baseline;
  gap:.6rem;
  padding:.5rem .1rem;
  color:var(--space-deep);
  font-size:.94rem;
  border-bottom:1px dashed rgba(11,31,58,.22);
  transition:background-color .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
}
.search-index__link:hover,
.search-index__link:focus-visible{
  background:rgba(255,107,53,.14);
  border-bottom-color:var(--orange);
  color:#040D1A;
}
.search-index__num{
  flex:none;
  font:500 10px/1 var(--font-mono);
  letter-spacing:.08em;
  color:rgba(11,31,58,.45);
}
.search-index__label{font-weight:500;}
.search-index__route{
  margin-left:auto;
  font:500 10px/1 var(--font-mono);
  letter-spacing:.04em;
  color:rgba(11,31,58,.4);
}
.search-empty{
  margin-top:1rem;
  max-width:60ch;
  font-size:.92rem;
  color:rgba(11,31,58,.68);
}
.search-empty[hidden]{display:none;}

/* ---------- 12. 页头 · 回到顶部 ---------- */
.to-top{
  position:fixed;
  right:clamp(.9rem,2vw,1.6rem);
  bottom:clamp(.9rem,2vw,1.6rem);
  z-index:110;
  display:inline-flex;
  align-items:center;
  gap:.45rem;
  padding:.6rem .8rem;
  background:rgba(7,20,39,.94);
  border:1px solid rgba(0,229,255,.45);
  border-radius:var(--radius);
  color:var(--ice);
  font:500 10.5px/1 var(--font-mono);
  letter-spacing:.14em;
  cursor:pointer;
  transition:border-color .2s var(--ease),color .2s var(--ease),background-color .2s var(--ease);
}
.to-top:hover,
.to-top:focus-visible{
  border-color:var(--cyan);
  background:var(--midnight);
  color:#FFFFFF;
}
.to-top[hidden]{display:none;}
.to-top__glyph{font-size:12px;line-height:1;}

/* ---------- 13. 页脚 ---------- */
.site-footer{
  position:relative;
  background:var(--space-deep);
  color:var(--white);
  border-top:1px solid rgba(0,229,255,.3);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:5px;
  pointer-events:none;
  background:repeating-linear-gradient(90deg,rgba(0,229,255,.55) 0 16px,transparent 16px 32px);
  opacity:.55;
}

.footer__grid{
  display:grid;
  grid-template-columns:1.3fr .85fr 1.15fr;
  gap:2.75rem 2.5rem;
  padding-block:clamp(2.6rem,5vw,4rem) clamp(2rem,3.5vw,2.75rem);
}
.footer__brand{min-width:0;}
.footer__tagline{
  margin-top:1.15rem;
  max-width:24ch;
  font:500 12.5px/1.9 var(--font-mono);
  letter-spacing:.08em;
  color:var(--mist);
}
.footer__caps{
  display:flex;
  flex-wrap:wrap;
  gap:.45rem;
  margin-top:1.25rem;
}
.cap{
  display:inline-flex;
  align-items:center;
  padding:.4rem .6rem;
  border:1px solid var(--hair-strong);
  color:var(--ice);
  font:500 10.5px/1 var(--font-mono);
  letter-spacing:.1em;
}
.cap--hot{
  border-color:rgba(255,107,53,.55);
  color:var(--orange);
}

.footer__col{min-width:0;}
.footer__title{
  display:flex;
  align-items:center;
  gap:.7rem;
  font:500 10.5px/1 var(--font-mono);
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--cyan);
}
.footer__title::after{
  content:"";
  flex:1 1 auto;
  height:1px;
  background:var(--hair);
}
.footer__links{
  margin-top:1.05rem;
  display:grid;
  gap:.05rem;
}
.footer__links a{
  display:inline-flex;
  align-items:center;
  gap:.5rem;
  padding:.32rem 0;
  color:var(--white);
  font-size:.94rem;
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer__links a::before{
  content:"";
  width:6px;
  height:1px;
  flex:none;
  background:var(--mist);
  transition:width .18s var(--ease),background-color .18s var(--ease);
}
.footer__links a:hover,
.footer__links a:focus-visible{
  color:var(--cyan);
  border-bottom-color:rgba(0,229,255,.5);
}
.footer__links a:hover::before,
.footer__links a:focus-visible::before{
  width:12px;
  background:var(--orange);
}
.footer__links a[aria-current="page"]{color:var(--cyan);}
.footer__links a[aria-current="page"]::before{
  width:12px;
  background:var(--orange);
}

.contact-list{
  display:grid;
  gap:.15rem;
  margin-top:1.05rem;
}
.contact-row{
  display:grid;
  grid-template-columns:5.4rem minmax(0,1fr);
  gap:.15rem .6rem;
  padding:.55rem 0;
  border-bottom:1px dashed rgba(143,161,184,.2);
}
.contact-row__key{
  font:500 10px/1.9 var(--font-mono);
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--mist);
}
.contact-row__val{
  min-width:0;
  font-size:.92rem;
  line-height:1.7;
  color:var(--white);
  overflow-wrap:anywhere;
}
.contact-row__val--mono{
  font:500 .86rem/1.7 var(--font-mono);
  letter-spacing:.01em;
}
.copy-btn{
  grid-column:2;
  justify-self:start;
  margin-top:.3rem;
  padding:.28rem .55rem;
  background:transparent;
  border:1px solid var(--hair-strong);
  border-radius:var(--radius);
  color:var(--mist);
  font:500 10px/1 var(--font-mono);
  letter-spacing:.12em;
  cursor:pointer;
  transition:border-color .18s var(--ease),color .18s var(--ease),background-color .18s var(--ease);
}
.copy-btn:hover,
.copy-btn:focus-visible{
  border-color:var(--cyan);
  color:var(--cyan);
  background:rgba(0,229,255,.08);
}
.copy-btn[data-copied]{
  border-color:rgba(255,107,53,.7);
  color:var(--orange);
  background:transparent;
}

.footer__bar{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:.6rem 1.5rem;
  padding-block:1.15rem 1.5rem;
  border-top:1px solid var(--hair);
}
.footer__legal{
  display:flex;
  flex-wrap:wrap;
  gap:.35rem 1.2rem;
  max-width:none;
  font:500 11px/1.7 var(--font-mono);
  letter-spacing:.08em;
  color:var(--mist);
}
.footer__note{
  max-width:none;
  font:500 10.5px/1.7 var(--font-mono);
  letter-spacing:.1em;
  color:rgba(143,161,184,.8);
}

/* ---------- 14. 入场动效（可选数据属性） ---------- */
[data-reveal].is-revealed{
  animation:reveal-in .55s var(--ease) both;
}
@keyframes reveal-in{
  from{opacity:0;transform:translateY(14px);}
  to{opacity:1;transform:none;}
}

/* ---------- 15. 响应式 ---------- */
@media (max-width:1023px){
  .site-nav__link{padding-inline:.65rem;font-size:.9rem;}
  .footer__grid{grid-template-columns:1.2fr .9fr;}
}

@media (max-width:899px){
  .navband__inner{
    justify-content:space-between;
    min-height:54px;
  }
  .navband__label{display:inline-flex;}
  .nav-toggle{display:inline-flex;}

  .site-nav{display:none;}
  .site-nav[data-open]{
    display:block;
    position:absolute;
    top:100%;
    left:calc(var(--gutter) * -1);
    right:calc(var(--gutter) * -1);
    z-index:60;
    background:var(--space-deep);
    border-top:1px solid rgba(0,229,255,.35);
    border-bottom:1px solid rgba(0,229,255,.25);
    box-shadow:0 26px 44px -26px rgba(0,0,0,.95);
  }
  .site-nav[data-open] .site-nav__list{
    flex-direction:column;
    flex-wrap:nowrap;
    align-items:stretch;
    padding:.4rem 0;
  }
  .site-nav[data-open] .site-nav__item{
    border-left:0;
    border-top:1px solid rgba(143,161,184,.14);
  }
  .site-nav[data-open] .site-nav__item:first-child{border-top:0;}
  .site-nav[data-open] .site-nav__link{
    width:100%;
    justify-content:flex-start;
    padding:1rem var(--gutter);
    font-size:1rem;
  }
  .site-nav[data-open] .site-nav__link::after{
    left:var(--gutter);
    right:auto;
    bottom:.7rem;
    width:30px;
  }
  .site-nav[data-open] .site-nav__num{font-size:10.5px;}

  .topline__meta--mid{display:none;}

  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr));}
  .grid--split{grid-template-columns:minmax(0,1fr);}
}

@media (max-width:719px){
  .masthead__inner::before,
  .masthead__inner::after{display:none;}
  .brandmark__sub{font-size:9px;letter-spacing:.16em;}
  .footer__grid{grid-template-columns:minmax(0,1fr);gap:2rem;}
  .search-field__label{display:none;}
  .search-field__hint{display:none;}
  .footer__bar{flex-direction:column;align-items:flex-start;}
}

@media (max-width:639px){
  .grid--2,
  .grid--3{grid-template-columns:minmax(0,1fr);}
  .topline__meta{display:none;}
  .topline__tools{margin-left:auto;}
  .contact-row{grid-template-columns:minmax(0,1fr);gap:.1rem;}
  .copy-btn{grid-column:1;}
  .to-top{padding:.5rem .65rem;letter-spacing:.1em;}
}

@media (max-width:400px){
  .status-chip{display:none;}
}

/* ---------- 16. 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].is-revealed{animation:none;}
}