/* ============================================================
   球王会赛场 — /assets/site.css
   共享层：reset / tokens / 中文排版 / 头部 / 页脚 / 基础组件
   ============================================================ */

/* ---------- 1. Tokens ---------- */
:root{
  --abyss-green:#041A15;
  --control-green:#0A2B24;
  --pitch-green:#103B31;
  --neon-cyan:#2EF2D0;
  --signal-orange:#FF7A2F;
  --cold-blue-gray:#8FA6B2;
  --warm-white:#F5F1E8;
  --burgundy:#6E1F3A;
  --indigo:#2B2A6E;
  --amber:#FFC857;

  --bg:var(--abyss-green);
  --panel:var(--control-green);
  --text:var(--warm-white);
  --muted:var(--cold-blue-gray);

  --line:rgba(46,242,208,.16);
  --line-soft:rgba(143,166,178,.18);
  --glass:rgba(10,43,36,.62);
  --signal-soft:rgba(255,122,47,.45);

  --font-display:"Barlow Condensed","DIN Condensed","Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",SFMono-Regular,Consolas,monospace;

  --rail-w:112px;
  --masthead-h:76px;
  --page-max:1500px;
  --gutter:clamp(18px,4.2vw,64px);
  --radius:2px;
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--masthead-h) + 18px);
}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,figcaption,blockquote,dl,dt,dd{margin:0;}
ul,ol{padding:0;}
ul[class],ol[class]{list-style:none;}
img,svg,video{display:block;max-width:100%;height:auto;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
a{color:inherit;text-decoration:none;}
table{border-collapse:collapse;width:100%;}
:focus-visible{outline:2px solid var(--neon-cyan);outline-offset:3px;border-radius:2px;}
::selection{background:var(--neon-cyan);color:var(--abyss-green);}

/* ---------- 3. 中文排版基线 ---------- */
body{
  min-height:100vh;
  padding-top:var(--masthead-h);
  background:
    radial-gradient(1200px 620px at 80% -14%, rgba(46,242,208,.10), transparent 62%),
    radial-gradient(900px 540px at 6% 4%, rgba(43,42,110,.32), transparent 66%),
    var(--abyss-green);
  color:var(--text);
  font-family:var(--font-body);
  font-size:clamp(16px,0.55vw + 12px,17.5px);
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:600;
  line-height:1.06;
  letter-spacing:.02em;
  color:var(--warm-white);
}
h1{font-size:clamp(2.6rem,7vw,6rem);line-height:.98;}
h2{font-size:clamp(1.9rem,3.6vw,3.1rem);}
h3{font-size:clamp(1.25rem,2vw,1.75rem);line-height:1.25;}
strong{color:var(--warm-white);font-weight:600;}
small{font-size:.82em;}

.mono{font-family:var(--font-mono);}
.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum" 1;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--neon-cyan);
}
.eyebrow::before{
  content:"";
  width:22px;height:1px;
  background:currentColor;
  opacity:.85;
}

.u-visually-hidden{
  position:absolute !important;
  width:1px;height:1px;
  padding:0;margin:-1px;
  overflow:hidden;
  clip:rect(0 0 0 0);
  white-space:nowrap;
  border:0;
}

/* ---------- 4. 布局容器 ---------- */
.container{
  width:100%;
  max-width:var(--page-max);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.container--narrow{max-width:980px;}
.page-main{padding-block:clamp(22px,3vw,46px) 0;}
.section{padding-block:clamp(44px,6.5vw,104px);}

.grid{display:grid;gap:clamp(14px,2vw,26px);}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr));}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr));}

.layout-split{
  display:grid;
  grid-template-columns:minmax(0,7fr) minmax(0,3fr);
  gap:clamp(22px,3.5vw,56px);
  align-items:start;
}

/* ---------- 5. 跳转链接 ---------- */
.skip-link{
  position:fixed;
  top:8px;left:8px;
  z-index:200;
  transform:translateY(-220%);
  padding:10px 18px;
  background:var(--signal-orange);
  color:var(--abyss-green);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  border-radius:var(--radius);
  transition:transform .18s ease;
}
.skip-link:focus{transform:translateY(0);}

/* ---------- 6. 头部：仪表横梁 ---------- */
.masthead{
  position:fixed;
  top:0;left:0;right:0;
  z-index:90;
  height:var(--masthead-h);
  display:grid;
  grid-template-columns:var(--rail-w) minmax(0,1fr) auto;
  align-items:stretch;
  background:linear-gradient(180deg,rgba(10,43,36,.88),rgba(4,26,21,.94));
  -webkit-backdrop-filter:blur(14px) saturate(150%);
  backdrop-filter:blur(14px) saturate(150%);
  border-bottom:1px solid var(--line);
  transition:background .25s ease,box-shadow .25s ease;
}
.masthead[data-scrolled="true"]{
  background:linear-gradient(180deg,rgba(10,43,36,.985),rgba(4,26,21,.995));
  box-shadow:0 16px 34px -22px rgba(0,0,0,.95);
}

.masthead__rail{
  display:flex;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  min-width:0;
  padding:0 12px;
  border-right:1px solid var(--line);
  background:linear-gradient(180deg,rgba(46,242,208,.08),transparent 88%);
}

.brand{display:flex;align-items:center;gap:6px;min-width:0;}
.brand__mark{
  flex:none;
  width:9px;height:9px;
  border-radius:1px;
  background:linear-gradient(135deg,var(--neon-cyan),var(--signal-orange));
  box-shadow:0 0 10px rgba(46,242,208,.55);
}
.brand__name{
  font-family:var(--font-display);
  font-size:13px;
  font-weight:700;
  letter-spacing:.06em;
  color:var(--warm-white);
  white-space:nowrap;
}
.brand__meta{
  display:flex;
  align-items:center;
  gap:6px;
  font-family:var(--font-mono);
  font-size:9.5px;
  letter-spacing:.1em;
  color:var(--cold-blue-gray);
  white-space:nowrap;
}

.status-dot{
  flex:none;
  width:6px;height:6px;
  border-radius:50%;
  background:var(--neon-cyan);
  animation:pulse-dot 2.4s ease-out infinite;
}
@keyframes pulse-dot{
  0%{box-shadow:0 0 0 0 rgba(46,242,208,.55);}
  70%{box-shadow:0 0 0 7px rgba(46,242,208,0);}
  100%{box-shadow:0 0 0 0 rgba(46,242,208,0);}
}

/* 导航 */
.nav{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  min-width:0;
  padding-right:clamp(8px,1.4vw,22px);
}
.nav__list{
  display:flex;
  flex-wrap:nowrap;
  align-items:center;
  gap:clamp(8px,1.5vw,26px);
}
.nav__item{display:block;}
.nav__item--cta{display:none;}

.nav__link{
  position:relative;
  display:block;
  padding:8px 2px;
  font-size:13px;
  letter-spacing:.04em;
  color:var(--cold-blue-gray);
  white-space:nowrap;
  transition:color .18s ease;
}
.nav__link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:2px;
  background:var(--neon-cyan);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .22s ease,background-color .22s ease;
}
.nav__link:hover{color:var(--warm-white);}
.nav__link:hover::after{transform:scaleX(1);}
.nav__link[aria-current="page"]{color:var(--warm-white);}
.nav__link[aria-current="page"]::after{
  background:var(--signal-orange);
  transform:scaleX(1);
}

/* 头部右侧动作区 */
.masthead__actions{
  display:flex;
  align-items:center;
  gap:8px;
  padding:0 clamp(14px,2.2vw,38px) 0 6px;
}

/* 移动端汉堡 */
.nav-toggle{
  display:none;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:4px;
  width:50px;height:38px;
  border:1px solid var(--line-soft);
  border-radius:var(--radius);
  color:var(--cold-blue-gray);
  transition:border-color .2s ease,color .2s ease;
}
.nav-toggle:hover{border-color:var(--neon-cyan);color:var(--neon-cyan);}
.nav-toggle__bar{
  display:block;
  width:16px;height:1.5px;
  background:currentColor;
  transform-origin:50% 50%;
  transition:transform .22s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1){
  transform:translateY(2.75px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2){
  transform:translateY(-2.75px) rotate(-45deg);
}

/* 阅读进度 */
.progress-rail{
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:2px;
  background:rgba(46,242,208,.10);
  pointer-events:none;
}
.progress-rail__fill{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--neon-cyan),var(--signal-orange));
  transition:width .08s linear;
}

/* ---------- 7. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 20px;
  border:1px solid transparent;
  border-radius:var(--radius);
  font-family:var(--font-display);
  font-size:13px;
  font-weight:600;
  letter-spacing:.1em;
  line-height:1.2;
  transition:transform .18s ease,background-color .18s ease,color .18s ease,border-color .18s ease;
}
.btn--signal{
  background:var(--signal-orange);
  color:var(--abyss-green);
  font-weight:700;
}
.btn--signal:hover{background:#ff9155;transform:translateY(-1px);}
.btn--ghost{
  border-color:var(--line-soft);
  color:var(--warm-white);
}
.btn--ghost:hover{border-color:var(--neon-cyan);color:var(--neon-cyan);}
.btn--sm{padding:8px 14px;font-size:12px;letter-spacing:.08em;}

/* ---------- 8. 页脚：收车仪表盘 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(56px,8vw,120px);
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(10,43,36,.94) 0%,rgba(4,26,21,.99) 48%,var(--abyss-green) 100%);
  color:var(--cold-blue-gray);
  font-size:14px;
  line-height:1.7;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;left:0;
  width:clamp(120px,22%,300px);
  height:2px;
  background:linear-gradient(90deg,var(--neon-cyan),var(--signal-orange));
}
.footer-inner{
  max-width:var(--page-max);
  margin-inline:auto;
  padding:clamp(40px,5.5vw,72px) var(--gutter) 26px;
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1.5fr) minmax(0,1fr) minmax(0,1.1fr);
  gap:clamp(28px,4vw,64px);
}
.footer-brand{min-width:0;}
.footer-brand__title{
  font-family:var(--font-display);
  font-size:clamp(1.7rem,3vw,2.4rem);
  line-height:1;
  letter-spacing:.06em;
  color:var(--warm-white);
}
.footer-brand__tag{
  margin-top:14px;
  max-width:34ch;
  color:var(--cold-blue-gray);
}
.footer-brand__status{
  display:flex;
  align-items:center;
  gap:9px;
  margin-top:18px;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.1em;
  color:var(--cold-blue-gray);
}
.footer-col{min-width:0;}
.footer-heading{
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--neon-cyan);
  padding-bottom:10px;
  margin-bottom:15px;
  border-bottom:1px solid var(--line);
  line-height:1.4;
}
.footer-list{display:grid;gap:9px;font-size:14px;}
.footer-list a{
  display:inline-block;
  color:var(--cold-blue-gray);
  transition:color .18s ease,transform .18s ease;
}
.footer-list a:hover{color:var(--warm-white);transform:translateX(3px);}

.footer-contact{display:grid;gap:10px;}
.footer-contact__row{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:10px;
  align-items:baseline;
}
.footer-contact__key{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--cold-blue-gray);
  opacity:.8;
}
.footer-contact__val{
  color:var(--warm-white);
  font-size:13.5px;
  word-break:break-word;
}
.footer-contact__note{
  margin-top:14px;
  padding-left:11px;
  border-left:2px solid var(--signal-orange);
  font-size:12.5px;
  line-height:1.6;
  color:var(--cold-blue-gray);
}

.footer-dash{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:10px;
  margin-top:clamp(30px,4.5vw,52px);
}
.dash-cell{
  padding:12px 14px;
  border:1px solid var(--line-soft);
  border-left:2px solid var(--neon-cyan);
  border-radius:var(--radius);
  background:rgba(16,59,49,.55);
}
.dash-cell:nth-child(2){border-left-color:var(--signal-orange);}
.dash-cell:nth-child(3){border-left-color:var(--amber);}
.dash-cell:nth-child(4){border-left-color:var(--burgundy);}
.dash-cell__num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:clamp(1.1rem,2vw,1.5rem);
  line-height:1.1;
  color:var(--neon-cyan);
}
.dash-cell:nth-child(2) .dash-cell__num{color:var(--signal-orange);}
.dash-cell:nth-child(3) .dash-cell__num{color:var(--amber);}
.dash-cell:nth-child(4) .dash-cell__num{color:var(--warm-white);}
.dash-cell__label{
  margin-top:5px;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--cold-blue-gray);
}

.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px 24px;
  margin-top:clamp(26px,3.5vw,42px);
  padding-top:20px;
  border-top:1px solid var(--line-soft);
  font-size:12.5px;
}
.footer-icp{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.06em;
  color:var(--cold-blue-gray);
}
.footer-legal{display:flex;flex-wrap:wrap;gap:10px 18px;}
.footer-legal a{color:var(--cold-blue-gray);transition:color .18s ease;}
.footer-legal a:hover{color:var(--neon-cyan);}
.footer-copy{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--cold-blue-gray);
}
.footer-copy [data-year]{color:var(--warm-white);}

/* ---------- 9. 面包屑 ---------- */
.breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  padding-block:18px 0;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--cold-blue-gray);
}
.breadcrumbs li{display:flex;align-items:center;gap:8px;}
.breadcrumbs li + li::before{
  content:"/";
  color:rgba(143,166,178,.45);
}
.breadcrumbs a{transition:color .18s ease;}
.breadcrumbs a:hover{color:var(--neon-cyan);}
.breadcrumbs [aria-current="page"]{color:var(--warm-white);}

/* ---------- 10. 正文区 ---------- */
.prose{max-width:72ch;}
.prose > * + *{margin-top:1.15em;}
.prose p,.prose li{color:rgba(245,241,232,.86);}
.prose h2{margin-top:1.9em;font-size:clamp(1.6rem,2.6vw,2.2rem);}
.prose h3{margin-top:1.5em;}
.prose a{
  color:var(--neon-cyan);
  text-decoration:underline;
  text-decoration-thickness:1px;
  text-underline-offset:3px;
}
.prose ul{list-style:none;padding-left:0;}
.prose ul li{position:relative;padding-left:20px;}
.prose ul li::before{
  content:"";
  position:absolute;
  left:0;top:.72em;
  width:7px;height:7px;
  background:var(--neon-cyan);
  border-radius:1px;
  transform:rotate(45deg);
}

.aside-note{
  padding:4px 0 4px 16px;
  border-left:2px solid var(--neon-cyan);
  font-size:14px;
  line-height:1.7;
  color:var(--cold-blue-gray);
}

/* ---------- 11. 卡片与标签 ---------- */
.card{
  position:relative;
  padding:clamp(18px,2.4vw,28px);
  border:1px solid var(--line-soft);
  border-radius:var(--radius);
  background:linear-gradient(160deg,rgba(16,59,49,.72),rgba(10,43,36,.92));
  overflow:hidden;
  transition:border-color .22s ease,transform .22s ease;
}
.card:hover{border-color:var(--line);transform:translateY(-2px);}
.card__label{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--neon-cyan);
}
.card__title{
  margin-top:8px;
  font-family:var(--font-display);
  font-size:clamp(1.2rem,1.9vw,1.6rem);
  line-height:1.15;
  color:var(--warm-white);
}
.card__text{
  margin-top:10px;
  font-size:14.5px;
  line-height:1.7;
  color:var(--cold-blue-gray);
}

.chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 11px;
  border:1px solid var(--line-soft);
  border-radius:999px;
  background:rgba(10,43,36,.6);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--cold-blue-gray);
}
.chip--cyan{border-color:rgba(46,242,208,.42);color:var(--neon-cyan);}
.chip--signal{border-color:var(--signal-soft);color:var(--signal-orange);}

/* ---------- 12. 图片容器基础规则 ---------- */
.img-frame{
  position:relative;
  display:block;
  width:100%;
  aspect-ratio:16 / 9;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:
    radial-gradient(120% 90% at 20% 0%, rgba(46,242,208,.10), transparent 60%),
    linear-gradient(140deg,#0A2B24 0%,#103B31 54%,#06231d 100%);
}
.img-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(90deg,rgba(46,242,208,.16) 1px,transparent 1px),
    linear-gradient(0deg,rgba(46,242,208,.10) 1px,transparent 1px);
  background-size:40px 40px;
  mix-blend-mode:screen;
}
.img-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.img-frame--wide{aspect-ratio:21 / 9;}
.img-frame--tall{aspect-ratio:3 / 4;}
.img-frame__caption{
  margin-top:8px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--cold-blue-gray);
}

/* ---------- 13. 平板 ---------- */
@media (max-width:1180px) and (min-width:901px){
  .nav__list{gap:12px;}
  .nav__link{font-size:12px;letter-spacing:0;}
}

@media (max-width:960px){
  .layout-split{grid-template-columns:minmax(0,1fr);}
  .grid--3,.grid--4{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-brand{grid-column:1 / -1;}
  .footer-dash{grid-template-columns:repeat(2,minmax(0,1fr));}
}

/* ---------- 14. 移动端 ---------- */
@media (max-width:900px){
  :root{
    --masthead-h:62px;
    --rail-w:auto;
  }

  .masthead{grid-template-columns:minmax(0,1fr) auto;}

  .masthead__rail{
    flex-direction:row;
    align-items:center;
    justify-content:flex-start;
    gap:14px;
    padding:0 16px;
    border-right:0;
  }
  .brand__name{font-size:15px;letter-spacing:.08em;}
  .brand__meta{display:none;}

  .masthead__actions{padding:0 14px 0 0;gap:8px;}
  .masthead__actions .btn{display:none;}
  .nav-toggle{display:flex;}

  .nav{
    position:absolute;
    top:100%;left:0;right:0;
    display:block;
    max-height:0;
    overflow:hidden;
    opacity:0;
    background:rgba(4,26,21,.985);
    -webkit-backdrop-filter:blur(18px) saturate(150%);
    backdrop-filter:blur(18px) saturate(150%);
    border-bottom:1px solid var(--line);
    transition:max-height .32s ease,opacity .22s ease;
  }
  .nav[data-open="true"]{
    max-height:min(78vh,560px);
    overflow-y:auto;
    opacity:1;
  }

  .nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:10px 16px 22px;
  }
  .nav__item--cta{display:block;margin-top:14px;}

  .nav__link{
    display:flex;
    align-items:center;
    padding:14px 2px;
    font-size:15px;
    letter-spacing:.03em;
    border-bottom:1px solid rgba(143,166,178,.12);
  }
  .nav__link::after{display:none;}
  .nav__link[aria-current="page"]{color:var(--neon-cyan);}
  .nav__link[aria-current="page"]::before{
    content:"";
    flex:none;
    width:3px;height:16px;
    margin-right:10px;
    border-radius:1px;
    background:var(--signal-orange);
  }
  .nav__link--cta{
    justify-content:center;
    border-bottom:0;
    border-radius:var(--radius);
    background:var(--signal-orange);
    color:var(--abyss-green);
    font-family:var(--font-display);
    font-weight:700;
    letter-spacing:.1em;
  }
  .nav__link--cta[aria-current="page"]::before{display:none;}
}

@media (max-width:600px){
  .grid--2,.grid--3,.grid--4{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:minmax(0,1fr);}
  .footer-dash{grid-template-columns:minmax(0,1fr);}
  .footer-base{flex-direction:column;align-items:flex-start;}
  .footer-contact__row{grid-template-columns:minmax(0,1fr);gap:2px;}
  .img-frame--wide{aspect-ratio:16 / 9;}
}

/* ---------- 15. 减少动态 ---------- */
@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;
  }
  .status-dot{animation:none;box-shadow:0 0 0 2px rgba(46,242,208,.22);}
  .progress-rail__fill{transition:none;}
  .card:hover{transform:none;}
}