/* ==========================================================
   6t体育赛场 — 共享样式 /assets/site.css
   头部 · 页脚 · 通用按钮 · 面包屑 · 正文容器 · 网格 · 基础组件
   ========================================================== */

/* ---- 1. 变量 ---- */
:root{
  --night:#071A2B;
  --moss:#0B2A24;
  --ink:#05090D;
  --lime:#B6FF3B;
  --lime-dim:#9FE42C;
  --amber:#FF8A3D;
  --cyan:#2BD9FF;
  --blue:#1B6BFF;
  --fog:#F2F7F4;
  --sage:#6F8F84;
  --wash:#E8FFD1;

  --line:rgba(111,143,132,.30);
  --line-soft:rgba(111,143,132,.15);

  --shell:1280px;
  --shell-narrow:760px;
  --gutter:clamp(18px,4vw,56px);

  --font-display:"Arial Narrow","Helvetica Neue Condensed","Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"SF Mono","JetBrains Mono",Menlo,Consolas,"Courier New",monospace;

  --cut:22px;
  --cut-sm:12px;
  --ease:cubic-bezier(.22,.68,.24,1);
}

/* ---- 2. Reset ---- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{margin:0;}
h1,h2,h3,h4,p,figure,blockquote,dl,dd,dt{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
img,picture,svg,video{display:block;max-width:100%;}
button{font:inherit;color:inherit;background:none;border:0;}
a{color:inherit;}
table{border-collapse:collapse;width:100%;}
::selection{background:var(--lime);color:var(--ink);}

/* ---- 3. 中文排版基础 ---- */
body{
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  color:var(--fog);
  background:var(--night);
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
@media (min-width:768px){
  body{font-size:17px;}
}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:300;
  line-height:1.08;
  letter-spacing:-.01em;
  color:var(--fog);
}
p{max-width:70ch;}
strong{font-weight:600;color:var(--fog);}
code,kbd,samp{font-family:var(--font-mono);font-size:.92em;}

:where(a,button,[tabindex],summary):focus-visible{
  outline:2px solid var(--lime);
  outline-offset:3px;
}

/* ---- 4. 容器与网格 ---- */
.t6-shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.t6-shell--narrow{max-width:var(--shell-narrow);}
.t6-section{padding-block:clamp(40px,6vw,88px);}
.t6-split{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:clamp(24px,4vw,56px);
}
@media (min-width:900px){
  .t6-split{grid-template-columns:minmax(0,5fr) minmax(0,7fr);}
  .t6-split--flip{grid-template-columns:minmax(0,7fr) minmax(0,5fr);}
}

/* ---- 5. 基础组件 ---- */
.t6-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin:0;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--sage);
}
.t6-eyebrow::before{
  content:"";
  width:26px;
  height:1px;
  flex:0 0 auto;
  background:var(--lime);
}

.t6-display{
  font-family:var(--font-display);
  font-weight:200;
  font-size:clamp(44px,7vw,120px);
  line-height:.94;
  letter-spacing:-.02em;
  color:var(--fog);
  margin:0;
}

.t6-num{
  font-family:var(--font-mono);
  font-weight:600;
  font-variant-numeric:tabular-nums;
  letter-spacing:-.02em;
}

.t6-panel{
  position:relative;
  background:var(--moss);
  border:1px solid var(--line);
  padding:clamp(18px,3vw,32px);
  clip-path:polygon(0 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%);
}
.t6-panel--ink{background:var(--ink);}
.t6-panel--wash{background:var(--wash);color:var(--ink);border-color:transparent;}
.t6-panel--wash :where(h1,h2,h3,h4,p){color:var(--ink);}

.t6-band{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 14px;
  padding-block:14px;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}

.t6-rule{
  height:1px;
  border:0;
  margin:0;
  background:var(--line);
}
.t6-rule--slant{
  background:linear-gradient(90deg,transparent,var(--lime),transparent);
}

/* 按钮 */
.t6-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  font-family:var(--font-body);
  font-size:14px;
  font-weight:600;
  letter-spacing:.05em;
  text-decoration:none;
  color:var(--ink);
  background:var(--lime);
  border:1px solid var(--lime);
  cursor:pointer;
  clip-path:polygon(0 0,100% 0,100% calc(100% - var(--cut-sm)),calc(100% - var(--cut-sm)) 100%,0 100%);
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.t6-btn:hover{background:var(--lime-dim);border-color:var(--lime-dim);}
.t6-btn:active{transform:translateY(1px);}
.t6-btn--ghost{
  background:transparent;
  color:var(--fog);
  border-color:var(--line);
}
.t6-btn--ghost:hover{
  background:transparent;
  color:var(--lime);
  border-color:var(--lime);
}

/* 筛选按钮 */
.t6-chip{
  appearance:none;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 15px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.12em;
  color:var(--sage);
  background:transparent;
  border:1px solid var(--line);
  border-radius:0;
  cursor:pointer;
  transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);
}
.t6-chip:hover{color:var(--fog);border-color:var(--sage);}
.t6-chip[aria-pressed="true"]{
  color:var(--lime);
  border-color:var(--lime);
  background:rgba(182,255,59,.08);
}
.t6-chip:focus-visible{outline:2px solid var(--lime);outline-offset:2px;}

/* 面包屑 */
.t6-crumb{padding-block:18px 0;}
.t6-crumb__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--sage);
}
.t6-crumb__list li{display:inline-flex;align-items:center;}
.t6-crumb__list li:not(:last-child)::after{
  content:"/";
  margin-inline:9px;
  color:rgba(111,143,132,.55);
}
.t6-crumb__link{
  color:var(--sage);
  text-decoration:none;
  transition:color .2s var(--ease);
}
.t6-crumb__link:hover{color:var(--lime);}
.t6-crumb__list [aria-current="page"]{color:var(--fog);}

/* 图片容器 */
.t6-figure{
  position:relative;
  margin:0;
  overflow:hidden;
  background:linear-gradient(155deg,var(--moss),var(--ink));
  clip-path:polygon(0 0,100% 0,100% calc(100% - 26px),calc(100% - 26px) 100%,0 100%);
}
.t6-figure__media{
  display:block;
  width:100%;
  height:var(--fig-h,240px);
  object-fit:cover;
  filter:saturate(.92);
}
.t6-figure--wide{--fig-h:clamp(200px,30vw,400px);}
.t6-figure--tall{--fig-h:clamp(260px,42vw,520px);}
.t6-figure__cap{
  position:absolute;
  inset:auto 0 0 0;
  padding:14px 16px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--fog);
  background:linear-gradient(transparent,rgba(5,9,13,.88));
}

/* 轨迹绘制（装饰，不隐藏内容） */
[data-track]{position:relative;}
[data-track]::after{
  content:"";
  position:absolute;
  left:0;
  bottom:-1px;
  width:100%;
  height:2px;
  background:linear-gradient(90deg,var(--lime),var(--cyan));
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform .6s var(--ease);
}
[data-track].is-drawn::after{transform:scaleX(1);}

/* ---- 6. 头部 ---- */
.t6-header{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--night);
  border-bottom:1px solid var(--line);
}

.t6-skip{
  position:absolute;
  top:0;
  left:var(--gutter);
  z-index:5;
  padding:10px 18px;
  font-size:13px;
  font-weight:600;
  letter-spacing:.04em;
  text-decoration:none;
  color:var(--ink);
  background:var(--lime);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%);
  transform:translateY(-180%);
  transition:transform .2s var(--ease);
}
.t6-skip:focus{transform:translateY(6px);}

/* 上层信息带 */
.t6-util{
  background:var(--ink);
  max-height:44px;
  overflow:hidden;
  opacity:1;
  transition:max-height .38s var(--ease),opacity .28s var(--ease);
}
.t6-header[data-stuck] .t6-util{
  max-height:0;
  opacity:0;
}
.t6-util__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:44px;
}
.t6-util__motto{
  margin:0;
  font-size:11px;
  font-weight:500;
  letter-spacing:.24em;
  color:var(--lime);
  white-space:nowrap;
}
.t6-util__meta{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:11px;
  letter-spacing:.1em;
  color:var(--sage);
}
.t6-util__label{
  color:var(--sage);
  letter-spacing:.2em;
}
.t6-util__value{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.04em;
  color:var(--fog);
  border-bottom:1px solid var(--line);
  white-space:nowrap;
}

/* 下层导航条 */
.t6-bar{
  position:relative;
  background:linear-gradient(180deg,var(--night) 0%,rgba(7,26,43,.94) 100%);
}
.t6-bar__inner{
  display:flex;
  align-items:center;
  gap:clamp(12px,2vw,28px);
  min-height:74px;
}

/* 品牌 */
.t6-brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  text-decoration:none;
  color:var(--fog);
}
.t6-brand__mark{
  display:grid;
  place-items:center;
  width:46px;
  height:46px;
  flex:0 0 auto;
  font-family:var(--font-mono);
  font-size:16px;
  font-weight:700;
  letter-spacing:-.03em;
  color:var(--ink);
  background:var(--lime);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%);
}
.t6-brand__text{
  display:flex;
  flex-direction:column;
  font-size:15px;
  font-weight:500;
  line-height:1.2;
  letter-spacing:.02em;
  white-space:nowrap;
}
.t6-brand__sub{
  margin-top:3px;
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:400;
  letter-spacing:.24em;
  color:var(--sage);
}

/* 导航 */
.t6-nav{margin-left:auto;}
.t6-nav__list{
  display:flex;
  align-items:center;
  gap:clamp(12px,1.8vw,26px);
}
.t6-nav__item{display:block;}
.t6-nav__link{
  position:relative;
  display:inline-block;
  padding-block:8px;
  font-size:14px;
  letter-spacing:.04em;
  color:rgba(242,247,244,.78);
  text-decoration:none;
  white-space:nowrap;
  transition:color .2s var(--ease);
}
.t6-nav__link::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  background:var(--lime);
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform .25s var(--ease);
}
.t6-nav__link:hover{color:var(--fog);}
.t6-nav__link:hover::after{transform:scaleX(1);}
.t6-nav__link[aria-current="page"]{color:var(--fog);}
.t6-nav__link[aria-current="page"]::after{transform:scaleX(1);}

/* 头部 CTA */
.t6-cta{
  display:inline-flex;
  align-items:center;
  gap:8px;
  flex:0 0 auto;
  padding:10px 18px;
  font-size:13px;
  font-weight:600;
  letter-spacing:.06em;
  text-decoration:none;
  color:var(--ink);
  background:var(--lime);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%);
  transition:background-color .2s var(--ease);
}
.t6-cta:hover{background:var(--lime-dim);}

/* 移动导航按钮 */
.t6-navbtn{
  display:none;
  place-items:center;
  width:44px;
  height:44px;
  flex:0 0 auto;
  background:transparent;
  border:1px solid var(--line);
  color:var(--fog);
  cursor:pointer;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%);
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.t6-navbtn:hover{border-color:var(--sage);color:var(--lime);}
.t6-navbtn__bars{
  position:relative;
  display:block;
  width:18px;
  height:2px;
  background:currentColor;
  transition:background-color .2s var(--ease);
}
.t6-navbtn__bars::before,
.t6-navbtn__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;
  height:2px;
  background:currentColor;
  transition:transform .25s var(--ease);
}
.t6-navbtn__bars::before{top:-6px;}
.t6-navbtn__bars::after{top:6px;}
.t6-navbtn[aria-expanded="true"] .t6-navbtn__bars{background:transparent;}
.t6-navbtn[aria-expanded="true"] .t6-navbtn__bars::before{transform:translateY(6px) rotate(45deg);}
.t6-navbtn[aria-expanded="true"] .t6-navbtn__bars::after{transform:translateY(-6px) rotate(-45deg);}

/* 滚动进度 */
.t6-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  background:var(--lime);
  transform:scaleX(0);
  transform-origin:0 50%;
  will-change:transform;
}

/* 头部响应式 */
@media (max-width:1100px){
  .t6-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    margin-left:0;
    background:var(--ink);
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
    max-height:0;
    overflow:hidden;
    visibility:hidden;
    transition:max-height .35s var(--ease),visibility .35s var(--ease);
  }
  .t6-nav[data-open]{
    max-height:min(76vh,560px);
    overflow-y:auto;
    visibility:visible;
  }
  .t6-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:6px var(--gutter) 22px;
  }
  .t6-nav__link{
    display:block;
    padding-block:15px;
    font-size:17px;
    border-bottom:1px solid var(--line-soft);
  }
  .t6-nav__link::after{display:none;}
  .t6-nav__link[aria-current="page"]{color:var(--lime);}
  .t6-navbtn{display:inline-grid;}
  .t6-cta{margin-left:auto;}
  .t6-bar__inner{min-height:66px;}
}

@media (max-width:720px){
  .t6-util__meta{display:none;}
  .t6-util__inner{justify-content:flex-start;}
  .t6-brand__mark{width:40px;height:40px;font-size:14px;}
  .t6-brand__text{font-size:14px;}
  .t6-cta{padding:9px 14px;font-size:12px;}
}

@media (max-width:420px){
  .t6-brand__sub{display:none;}
  .t6-brand__text{font-size:13px;}
  .t6-cta{padding:8px 12px;font-size:11px;letter-spacing:.02em;}
}

/* ---- 7. 页脚 ---- */
.t6-footer{
  position:relative;
  margin-top:clamp(48px,8vw,120px);
  background:var(--moss);
  color:var(--fog);
  border-top:1px solid var(--line);
  clip-path:polygon(0 0,100% 0,100% 100%,0 100%);
}
.t6-footer::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  width:min(360px,55%);
  height:2px;
  background:linear-gradient(90deg,var(--lime),var(--cyan),transparent);
}
.t6-footer__grid{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:clamp(28px,4vw,48px);
  padding-block:clamp(40px,6vw,76px) clamp(28px,4vw,48px);
}
@media (min-width:640px){
  .t6-footer__grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (min-width:1024px){
  .t6-footer__grid{grid-template-columns:minmax(0,1.6fr) repeat(3,minmax(0,1fr));gap:clamp(28px,3vw,56px);}
}
.t6-footer__col{min-width:0;}
.t6-footer__col--brand{max-width:420px;}

.t6-brand--footer{margin-bottom:18px;}

.t6-footer__motto{
  max-width:34ch;
  font-size:14px;
  line-height:1.8;
  color:rgba(242,247,244,.72);
}
.t6-footer__meta{
  margin-top:16px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--sage);
}

.t6-footer__title{
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:16px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--sage);
}
.t6-footer__title::after{
  content:"";
  flex:1 1 auto;
  height:1px;
  background:var(--line-soft);
}

.t6-footer__list{display:grid;gap:9px;}
.t6-footer__link{
  display:inline-block;
  font-size:14px;
  color:rgba(242,247,244,.82);
  text-decoration:none;
  transition:color .2s var(--ease),transform .2s var(--ease);
}
.t6-footer__link:hover{color:var(--lime);transform:translateX(3px);}

.t6-footer__contact{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:7px 12px;
  margin-top:20px;
  padding-top:16px;
  border-top:1px solid var(--line-soft);
  font-size:12px;
  line-height:1.65;
}
.t6-footer__contact dt{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--sage);
}
.t6-footer__contact dd{
  margin:0;
  color:rgba(242,247,244,.86);
  word-break:break-word;
}

.t6-footer__base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  padding-block:20px max(20px,env(safe-area-inset-bottom));
  border-top:1px solid var(--line-soft);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--sage);
}
.t6-footer__copy{margin:0;}
.t6-footer__note{margin:0;color:rgba(111,143,132,.9);}

/* ---- 8. 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;
  }
  [data-track]::after{transform:scaleX(1);}
  .t6-skip{transition:none;}
}