/* =========================================================
   KI赛场 · /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 页头 / 页脚 / 基础组件
   ========================================================= */

:root{
  --ki-ink:#07111F;
  --ki-navy:#10243D;
  --ki-orange:#F06B2B;
  --ki-amber:#FFB15C;
  --ki-lime:#B8FF3D;
  --ki-cyan:#16E0D0;
  --ki-violet:#7B61FF;
  --ki-steel:#7F91A8;
  --ki-paper:#F4F8FC;

  --ki-glass:rgba(255,255,255,.08);
  --ki-glass-strong:rgba(255,255,255,.16);
  --ki-line:rgba(127,145,168,.26);
  --ki-line-strong:rgba(127,145,168,.48);

  --ki-radius-sm:10px;
  --ki-radius:14px;
  --ki-radius-lg:22px;

  --ki-shell:1240px;
  --ki-header-h:78px;

  --ki-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --ki-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd{margin:0;}
ul,ol{padding:0;list-style:none;}
img,svg,video{max-width:100%;display:block;}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer;}
a{color:inherit;text-decoration:none;}
table{border-collapse:collapse;width:100%;}

/* ---------- 页面底色：深蓝黑 + 场灯暖橙 + 数据网格 ---------- */
html,body{overflow-x:hidden;}
body{
  min-height:100vh;
  font-family:var(--ki-sans);
  font-size:16px;
  line-height:1.7;
  color:var(--ki-paper);
  background-color:var(--ki-ink);
  background-image:
    radial-gradient(1100px 620px at 88% -12%, rgba(240,107,43,.20), transparent 62%),
    radial-gradient(900px 520px at 2% 4%, rgba(22,224,208,.12), transparent 58%),
    radial-gradient(760px 520px at 50% 108%, rgba(123,97,255,.14), transparent 62%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(127,145,168,.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(127,145,168,.07) 1px, transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(circle at 50% 18%, #000 0%, transparent 76%);
  mask-image:radial-gradient(circle at 50% 18%, #000 0%, transparent 76%);
}

#main-content,.site-footer{position:relative;z-index:1;}

/* ---------- 中文排版 ---------- */
h1,h2,h3,h4{
  font-weight:900;
  line-height:1.16;
  letter-spacing:-.03em;
  color:var(--ki-paper);
}
h1{font-size:clamp(2.4rem,5.6vw,5.5rem);}
h2{font-size:clamp(1.75rem,3.4vw,2.9rem);}
h3{font-size:clamp(1.25rem,2vw,1.875rem);}
h4{font-size:clamp(1.05rem,1.4vw,1.25rem);}
strong{font-weight:800;color:var(--ki-paper);}
small{font-size:13px;color:var(--ki-steel);}
::selection{background:var(--ki-lime);color:#08111d;}

:focus{outline:none;}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,[tabindex]:focus-visible{
  outline:2px solid var(--ki-cyan);
  outline-offset:3px;
  border-radius:var(--ki-radius-sm);
}

/* ---------- 布局容器 ---------- */
.shell{
  width:100%;
  max-width:var(--ki-shell);
  margin-inline:auto;
  padding-inline:clamp(18px,3vw,32px);
}
.section{padding-block:clamp(56px,8vw,112px);}
.section--tight{padding-block:clamp(30px,4.5vw,60px);}
.divider{
  height:1px;
  border:0;
  margin-block:clamp(24px,4vw,48px);
  background:linear-gradient(90deg,var(--ki-line-strong),rgba(127,145,168,.05));
}

/* ---------- 索引式小标签 ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--ki-mono);
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--ki-cyan);
}
.eyebrow::before{
  content:"";
  width:28px;
  height:1px;
  background:currentColor;
  opacity:.75;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  border-radius:999px;
  border:1px solid transparent;
  font-family:var(--ki-mono);
  font-size:13px;
  font-weight:700;
  letter-spacing:.08em;
  white-space:nowrap;
  transition:transform .2s ease,background-color .2s ease,border-color .2s ease,color .2s ease,box-shadow .2s ease;
}
.btn-primary{
  background:linear-gradient(135deg,var(--ki-orange),var(--ki-amber));
  color:#14100c;
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(240,107,43,.30);}
.btn-ghost{
  border-color:var(--ki-line-strong);
  background:var(--ki-glass);
  color:var(--ki-paper);
}
.btn-ghost:hover{border-color:var(--ki-cyan);color:var(--ki-cyan);transform:translateY(-2px);}
.btn-sm{padding:9px 16px;font-size:12px;}

/* =========================================================
   HEADER · 框架式导航
   ========================================================= */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(7,17,31,.86);
  border-bottom:1px solid var(--ki-line);
  -webkit-backdrop-filter:blur(16px) saturate(150%);
  backdrop-filter:blur(16px) saturate(150%);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;right:0;top:0;
  height:2px;
  pointer-events:none;
  background:linear-gradient(90deg,var(--ki-orange) 0%,var(--ki-amber) 20%,var(--ki-lime) 46%,rgba(22,224,208,.55) 66%,rgba(123,97,255,.35) 84%,transparent 100%);
}
.scroll-meter{
  position:absolute;
  left:0;bottom:-1px;
  height:2px;
  width:100%;
  z-index:2;
  pointer-events:none;
  transform:scaleX(0);
  transform-origin:left center;
  background:linear-gradient(90deg,var(--ki-cyan),var(--ki-lime));
}

.skip-link{
  position:absolute;
  left:20px;
  top:-70px;
  z-index:80;
  padding:10px 18px;
  border-radius:0 0 12px 12px;
  background:var(--ki-lime);
  color:#08111d;
  font-family:var(--ki-mono);
  font-size:13px;
  font-weight:700;
  letter-spacing:.08em;
  transition:top .22s ease;
}
.skip-link:focus{top:0;}

.header-frame{
  display:grid;
  grid-template-columns:auto 1fr auto;
  align-items:center;
  gap:clamp(16px,2.4vw,36px);
  width:100%;
  max-width:var(--ki-shell);
  margin-inline:auto;
  min-height:var(--ki-header-h);
  padding:12px clamp(18px,3vw,32px);
}

/* 品牌 */
.brand{display:inline-flex;align-items:center;gap:12px;flex:none;}
.brand-glyph{
  display:grid;
  place-items:center;
  flex:none;
  width:42px;
  height:42px;
  border-radius:12px;
  font-family:var(--ki-mono);
  font-size:15px;
  font-weight:700;
  letter-spacing:.04em;
  color:#08111d;
  background:linear-gradient(150deg,var(--ki-lime),var(--ki-cyan));
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.26);
}
.brand-text{display:flex;flex-direction:column;line-height:1.2;}
.brand-name{font-weight:900;font-size:18px;letter-spacing:-.01em;}
.brand-line{
  font-family:var(--ki-mono);
  font-size:10px;
  letter-spacing:.16em;
  color:var(--ki-steel);
}

/* 主导航 */
.site-nav{display:flex;justify-content:center;min-width:0;}
.nav-list{display:flex;align-items:center;gap:2px;}
.nav-item{position:relative;}
.nav-link{
  position:relative;
  display:flex;
  flex-direction:column;
  gap:2px;
  padding:8px 14px;
  border-radius:var(--ki-radius-sm);
  transition:background-color .2s ease,color .2s ease;
}
.nav-index{
  font-family:var(--ki-mono);
  font-size:10px;
  letter-spacing:.16em;
  color:var(--ki-steel);
  transition:color .2s ease;
}
.nav-label{font-size:15px;font-weight:600;white-space:nowrap;}
.nav-link::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:2px;
  height:2px;
  border-radius:2px;
  background:var(--ki-lime);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .28s cubic-bezier(.2,.7,.2,1);
}
.nav-link:hover{background:var(--ki-glass);}
.nav-link:hover .nav-index{color:var(--ki-cyan);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link[aria-current="page"]{color:var(--ki-lime);}
.nav-link[aria-current="page"] .nav-index{color:var(--ki-lime);}
.nav-link[aria-current="page"]::after{transform:scaleX(1);}

/* 工具区 + 移动按钮 */
.header-tools{display:flex;align-items:center;gap:12px;justify-self:end;}
.header-cta{padding:10px 18px;font-size:12px;}

.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:9px 15px;
  border-radius:999px;
  border:1px solid var(--ki-line-strong);
  background:var(--ki-glass);
  color:var(--ki-paper);
  font-family:var(--ki-mono);
  font-size:12px;
  letter-spacing:.1em;
  transition:border-color .2s ease,color .2s ease;
}
.nav-toggle:hover{border-color:var(--ki-cyan);color:var(--ki-cyan);}
.nav-toggle-icon{display:grid;gap:4px;width:18px;}
.nav-toggle-icon span{
  display:block;
  height:2px;
  border-radius:2px;
  background:var(--ki-lime);
  transition:transform .26s ease,opacity .2s ease;
}
.site-header[data-open="true"] .nav-toggle{border-color:var(--ki-lime);color:var(--ki-lime);}
.site-header[data-open="true"] .nav-toggle-icon span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.site-header[data-open="true"] .nav-toggle-icon span:nth-child(2){opacity:0;}
.site-header[data-open="true"] .nav-toggle-icon span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

/* =========================================================
   FOOTER
   ========================================================= */
.site-footer{
  margin-top:clamp(64px,9vw,128px);
  border-top:1px solid var(--ki-line);
  background:linear-gradient(180deg,rgba(16,36,61,.62),rgba(7,17,31,.97));
}
.site-footer::before{
  content:"";
  display:block;
  height:3px;
  background:linear-gradient(90deg,transparent,var(--ki-orange),var(--ki-violet),transparent);
  opacity:.72;
}
.footer-frame{
  display:grid;
  grid-template-columns:minmax(280px,1fr) 1.55fr;
  gap:clamp(32px,5vw,64px);
  width:100%;
  max-width:var(--ki-shell);
  margin-inline:auto;
  padding:clamp(44px,6vw,72px) clamp(18px,3vw,32px) 28px;
}

.footer-brand{display:flex;flex-direction:column;align-items:flex-start;gap:18px;}
.footer-tagline{
  font-size:16px;
  line-height:1.72;
  color:rgba(244,248,252,.78);
  max-width:22ch;
}
.footer-contact{
  width:100%;
  display:flex;
  flex-direction:column;
  gap:10px;
  padding-top:18px;
  border-top:1px dashed var(--ki-line);
}
.footer-contact-title{
  font-family:var(--ki-mono);
  font-size:11px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--ki-orange);
}
.footer-contact-row{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  font-size:14px;
}
.footer-key{
  flex:none;
  padding:2px 8px;
  border:1px solid var(--ki-line);
  border-radius:6px;
  font-family:var(--ki-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--ki-steel);
}
.footer-value{
  font-family:var(--ki-mono);
  font-size:13px;
  color:var(--ki-paper);
  word-break:break-all;
}
.footer-value--soft{
  font-family:var(--ki-sans);
  font-size:14px;
  letter-spacing:.01em;
  color:rgba(244,248,252,.85);
  word-break:normal;
}
.footer-contact-note{
  font-size:13px;
  line-height:1.7;
  color:var(--ki-steel);
  max-width:34ch;
}
.copy-btn{
  flex:none;
  padding:3px 11px;
  border-radius:999px;
  border:1px solid var(--ki-line-strong);
  font-family:var(--ki-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--ki-steel);
  transition:color .2s ease,border-color .2s ease,background-color .2s ease;
}
.copy-btn:hover{color:var(--ki-cyan);border-color:var(--ki-cyan);background:var(--ki-glass);}
.copy-btn[data-copied="true"]{color:#08111d;background:var(--ki-lime);border-color:var(--ki-lime);}

.footer-body{display:flex;flex-direction:column;}
.footer-cols{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(20px,3vw,36px);
}
.footer-col-title{
  margin-bottom:14px;
  font-family:var(--ki-mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--ki-amber);
}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-link{
  display:inline-block;
  font-size:15px;
  color:rgba(244,248,252,.72);
  transition:color .2s ease,transform .2s ease;
}
.footer-link:hover{color:var(--ki-lime);transform:translateX(3px);}

.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 24px;
  margin-top:clamp(32px,4vw,48px);
  padding-top:20px;
  border-top:1px solid var(--ki-line);
  font-family:var(--ki-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--ki-steel);
}
.footer-icp,.footer-copy{margin:0;}

/* =========================================================
   基础组件
   ========================================================= */

/* 面包屑 */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--ki-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--ki-steel);
}
.breadcrumb li{display:flex;align-items:center;gap:8px;}
.breadcrumb li+li::before{content:"/";color:var(--ki-line-strong);}
.breadcrumb a{transition:color .2s ease;}
.breadcrumb a:hover{color:var(--ki-cyan);}
.breadcrumb [aria-current="page"]{color:var(--ki-paper);}

/* 玻璃面板 / 实色卡 */
.panel{
  padding:clamp(20px,3vw,32px);
  border:1px solid var(--ki-line);
  border-radius:var(--ki-radius-lg);
  background:var(--ki-glass);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
}
.card{
  display:flex;
  flex-direction:column;
  gap:10px;
  padding:clamp(18px,2.4vw,26px);
  border:1px solid var(--ki-line);
  border-radius:var(--ki-radius);
  background:linear-gradient(160deg,rgba(16,36,61,.94),rgba(9,20,36,.94));
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.card:hover{
  transform:translateY(-2px);
  border-color:rgba(255,177,92,.5);
  box-shadow:0 18px 38px rgba(0,0,0,.38);
}
.card-title{
  font-size:clamp(1.05rem,1.5vw,1.3rem);
  font-weight:800;
  letter-spacing:-.02em;
}

/* 数据 */
.stat{display:flex;flex-direction:column;gap:4px;}
.stat-value{
  font-family:var(--ki-mono);
  font-size:clamp(1.5rem,3vw,2.25rem);
  font-weight:700;
  line-height:1.1;
  letter-spacing:-.02em;
  color:var(--ki-lime);
}
.stat-label{
  font-family:var(--ki-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--ki-steel);
}

/* 标签 */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 11px;
  border:1px solid var(--ki-line-strong);
  border-radius:999px;
  font-family:var(--ki-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--ki-steel);
}
.tag--live{color:#08111d;background:var(--ki-lime);border-color:var(--ki-lime);font-weight:700;}
.tag--award{color:var(--ki-violet);border-color:rgba(123,97,255,.55);}

/* 注释 */
.note{
  font-size:13px;
  line-height:1.7;
  color:var(--ki-steel);
  max-width:52ch;
}

/* 长文 */
.prose{
  font-size:17px;
  line-height:1.82;
  color:rgba(244,248,252,.86);
}
.prose p{max-width:70ch;}
.prose p+p{margin-top:1.1em;}
.prose h2{margin-top:1.8em;margin-bottom:.55em;}
.prose h3{margin-top:1.5em;margin-bottom:.45em;}
.prose ul{margin-top:1em;display:flex;flex-direction:column;gap:.55em;}
.prose ul li{position:relative;padding-left:20px;max-width:70ch;}
.prose ul li::before{
  content:"";
  position:absolute;
  left:2px;top:.72em;
  width:6px;height:6px;
  border-radius:2px;
  background:var(--ki-orange);
}

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

/* 图片容器基础规则 */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  aspect-ratio:16 / 9;
  border:1px solid var(--ki-line);
  border-radius:var(--ki-radius-lg);
  background:linear-gradient(140deg,rgba(16,36,61,.95),rgba(7,17,31,.95));
}
.media-frame img,
.media-frame video{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(180deg,rgba(7,17,31,0) 46%,rgba(7,17,31,.58) 100%);
}
.media-frame--wide{aspect-ratio:21 / 9;}
.media-frame--square{aspect-ratio:1 / 1;}
.media-frame--tall{aspect-ratio:4 / 5;}

/* 最近一轮赛果条（页面级，sticky 贴视口底边） */
.result-strip{
  position:sticky;
  bottom:0;
  z-index:50;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 22px;
  width:100%;
  padding:12px clamp(18px,3vw,32px);
  border-top:1px solid var(--ki-line);
  background:linear-gradient(180deg,rgba(9,20,36,.72),rgba(7,17,31,.97));
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  font-family:var(--ki-mono);
  font-size:13px;
}
.result-strip__label{
  font-size:11px;
  letter-spacing:.16em;
  color:var(--ki-steel);
}
.result-strip__score{color:var(--ki-lime);font-weight:700;}
.result-strip__state{color:var(--ki-cyan);}

/* 显现动效 */
[data-reveal]{transition:opacity .6s ease,transform .6s ease;}
html[data-js="on"] [data-reveal]{opacity:0;transform:translateY(14px);}
html[data-js="on"] [data-reveal].is-visible{opacity:1;transform:none;}

/* =========================================================
   响应式
   ========================================================= */
@media (max-width:1080px){
  .header-frame{grid-template-columns:1fr auto;gap:14px;}
  .header-cta{display:none;}
  .nav-toggle{display:inline-flex;}

  .site-nav{
    position:absolute;
    left:0;right:0;top:100%;
    display:block;
    max-height:0;
    overflow:hidden;
    visibility:hidden;
    background:rgba(8,19,33,.98);
    border-bottom:1px solid var(--ki-line);
    -webkit-backdrop-filter:blur(14px);
    backdrop-filter:blur(14px);
    transition:max-height .32s ease,visibility .32s ease;
  }
  .site-header[data-open="true"] .site-nav{
    max-height:min(78vh,540px);
    overflow-y:auto;
    visibility:visible;
  }
  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:10px clamp(18px,3vw,32px) 24px;
  }
  .nav-link{
    flex-direction:row;
    align-items:baseline;
    gap:14px;
    padding:14px 2px;
    border-radius:0;
    border-bottom:1px solid var(--ki-line);
  }
  .nav-link::after{left:0;right:0;bottom:-1px;}
  .nav-label{font-size:16px;}

  .footer-frame{grid-template-columns:1fr;gap:36px;}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr));}
}

@media (max-width:760px){
  :root{--ki-header-h:70px;}
  .brand-glyph{width:36px;height:36px;font-size:13px;border-radius:10px;}
  .brand-name{font-size:16px;}
  .footer-cols{grid-template-columns:1fr;gap:26px;}
  .footer-base{flex-direction:column;align-items:flex-start;}
  .grid-2,.grid-3{grid-template-columns:1fr;}
  .media-frame{aspect-ratio:4 / 3;}
  .media-frame--wide,.media-frame--tall,.media-frame--square{aspect-ratio:4 / 3;}
  .prose{font-size:16px;}
  .result-strip{font-size:12px;gap:6px 16px;}
}

/* =========================================================
   动效降级
   ========================================================= */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  html[data-js="on"] [data-reveal]{opacity:1;transform:none;}
  .card:hover,.btn:hover{transform:none;}
  .footer-link:hover{transform:none;}
}