/* ==========================================================================
   球速体育主站 / 共享样式  /assets/site.css
   夜间赛道 · 精密网格 · 悬浮胶囊
   ========================================================================== */

:root{
  --ink-900:#06121F;
  --ink-800:#0A1E33;
  --ink-700:#123A5A;
  --cyan:#35F2E6;
  --cyan-dim:#00BFD8;
  --orange:#FF5B2E;
  --lime:#D7FF3F;
  --white:#F2FBFF;
  --mist:#A8C0D4;
  --line:#2B6076;
  --line-soft:rgba(43,96,118,.55);
  --line-faint:rgba(43,96,118,.26);

  --f-serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  --f-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --f-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Consolas,monospace;

  --shell:1320px;
  --gutter:clamp(16px,3.6vw,40px);
  --pill:999px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:180ms;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,p,figure,blockquote,dl,dd,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
img,svg{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
a{color:var(--cyan);text-decoration:none}
a:hover{color:var(--lime)}
:focus-visible{outline:2px solid var(--lime);outline-offset:3px;border-radius:2px}

/* ---------- 基础排版 ---------- */
body{
  min-height:100vh;
  font-family:var(--f-sans);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  color:var(--white);
  background-color:var(--ink-900);
  background-image:
    linear-gradient(90deg,var(--line-faint) 1px,transparent 1px),
    linear-gradient(180deg,var(--line-faint) 1px,transparent 1px);
  background-size:96px 96px;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
body.nav-open{overflow:hidden}
h1,h2,h3,h4{font-family:var(--f-serif);font-weight:700;line-height:1.2;letter-spacing:-.01em;color:var(--white)}
h1{font-size:clamp(30px,4.6vw,64px)}
h2{font-size:clamp(22px,2.6vw,40px)}
h3{font-size:clamp(18px,1.6vw,24px)}
h4{font-size:clamp(16px,1.2vw,20px)}
strong{color:var(--white);font-weight:700}
.mono{font-family:var(--f-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}

/* ---------- 布局 ---------- */
.container{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:clamp(44px,6vw,92px)}
.grid{display:grid;gap:clamp(14px,2vw,26px)}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
.hairline{height:1px;border:0;background:linear-gradient(90deg,var(--line),transparent)}

/* ---------- 眉标 / 标签 ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--f-mono);font-size:11px;font-weight:600;
  letter-spacing:.22em;text-transform:uppercase;color:var(--cyan);
}
.eyebrow::before{content:"";display:block;width:26px;height:1px;background:linear-gradient(90deg,var(--cyan),transparent)}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border:1px solid var(--line);border-radius:2px;
  font-family:var(--f-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--mist);background:rgba(18,58,90,.35);
}
.tag--cyan{color:var(--cyan);border-color:rgba(53,242,230,.42);background:rgba(53,242,230,.08)}
.tag--orange{color:var(--orange);border-color:rgba(255,91,46,.48);background:rgba(255,91,46,.1)}
.tag--lime{color:var(--lime);border-color:rgba(215,255,63,.42);background:rgba(215,255,63,.08)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border:1px solid transparent;border-radius:2px;
  font-family:var(--f-sans);font-size:14px;font-weight:600;line-height:1.2;letter-spacing:.02em;
  text-decoration:none;cursor:pointer;
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),
             border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.btn:hover{transform:translateY(-1px)}
.btn--primary{background:var(--orange);color:#08111C}
.btn--primary:hover{background:#FF7A52;color:#08111C}
.btn--cyan{background:var(--cyan);color:var(--ink-900)}
.btn--cyan:hover{background:var(--lime);color:var(--ink-900)}
.btn--ghost{background:transparent;border-color:var(--line);color:var(--white)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-family:var(--f-mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--mist);
}
.breadcrumb li{display:flex;align-items:center;gap:10px}
.breadcrumb li + li::before{content:"/";color:var(--line)}
.breadcrumb a{color:var(--mist)}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb [aria-current="page"]{color:var(--cyan)}

/* ---------- 正文 ---------- */
.prose{max-width:72ch;font-size:16.5px;line-height:1.9;color:var(--mist)}
.prose > * + *{margin-top:1.1em}
.prose h2,.prose h3{color:var(--white);margin-top:2em;line-height:1.3}
.prose a{color:var(--cyan);border-bottom:1px solid rgba(53,242,230,.4)}
.prose a:hover{color:var(--lime);border-bottom-color:var(--lime)}
.prose ul,.prose ol{padding-left:1.2em;list-style:disc}
.prose li + li{margin-top:.4em}

/* ---------- 图片容器（页面阶段放 <img>） ---------- */
.media-frame{
  position:relative;display:block;overflow:hidden;isolation:isolate;
  aspect-ratio:16/9;border:1px solid var(--line);border-radius:2px;
  background:linear-gradient(150deg,var(--ink-700) 0%,var(--ink-900) 82%);
}
.media-frame img{width:100%;height:100%;object-fit:cover;filter:contrast(1.05) saturate(1.06)}
.media-frame::before{
  content:"";position:absolute;left:0;right:0;bottom:0;height:3px;z-index:2;pointer-events:none;
  background:linear-gradient(90deg,var(--cyan),var(--orange));
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}
.media-frame--veil::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,transparent 44%,rgba(6,18,31,.8) 100%);
}

/* ---------- 跳过链接 ---------- */
.skip-link{
  position:fixed;top:10px;left:50%;z-index:200;
  padding:10px 20px;border-radius:2px;
  background:var(--lime);color:var(--ink-900);
  font-size:14px;font-weight:700;letter-spacing:.02em;
  transform:translate(-50%,-180%);
  transition:transform var(--dur) var(--ease);
}
.skip-link:focus{transform:translate(-50%,0);outline:none;color:var(--ink-900)}

/* ==========================================================================
   头部：双浮岛胶囊
   ========================================================================== */
.site-header{
  position:sticky;top:0;z-index:80;
  padding-top:12px;
  background:linear-gradient(180deg,rgba(6,18,31,.97) 0%,rgba(6,18,31,.72) 62%,rgba(6,18,31,0) 100%);
  transition:padding-top var(--dur) var(--ease);
}
.site-header.is-scrolled{padding-top:6px}

.header-shell{
  position:relative;
  width:100%;max-width:var(--shell);margin-inline:auto;
  padding-inline:var(--gutter);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
}

/* 品牌浮岛 */
.brand{
  display:inline-flex;align-items:center;gap:10px;
  padding:7px 18px 7px 9px;border-radius:var(--pill);
  background:rgba(10,30,51,.86);border:1px solid var(--line);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  color:var(--white);text-decoration:none;
  transition:border-color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.brand:hover{border-color:var(--cyan);background:rgba(18,58,90,.9);color:var(--white)}
.brand-mark{
  display:grid;place-items:center;flex:0 0 34px;width:34px;height:34px;
  border-radius:2px;color:var(--ink-900);transform:skewX(-8deg);
  background:linear-gradient(135deg,var(--cyan) 0%,var(--cyan-dim) 58%,var(--ink-700) 100%);
}
.brand-mark > svg{transform:skewX(8deg)}
.brand-text{display:flex;flex-direction:column;line-height:1.05}
.brand-name{font-family:var(--f-serif);font-size:16px;font-weight:700;letter-spacing:.02em;color:var(--white)}
.brand-sub{font-family:var(--f-mono);font-size:9.5px;letter-spacing:.24em;color:var(--cyan);opacity:.85;margin-top:3px}

/* 移动端开关 */
.nav-toggle{
  display:none;align-items:center;gap:9px;
  padding:10px 16px;border-radius:var(--pill);
  background:rgba(10,30,51,.9);border:1px solid var(--line);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  color:var(--white);font-size:13px;font-weight:600;
}
.nav-toggle:hover{border-color:var(--cyan)}
.nav-toggle-label{font-family:var(--f-sans);font-size:12.5px;font-weight:700;letter-spacing:.06em}
.nav-toggle-bars{position:relative;display:block;width:16px;height:2px;background:var(--cyan);transition:background-color var(--dur) var(--ease)}
.nav-toggle-bars::before,.nav-toggle-bars::after{
  content:"";position:absolute;left:0;width:16px;height:2px;background:var(--cyan);
  transition:transform var(--dur) var(--ease);
}
.nav-toggle-bars::before{top:-5px}
.nav-toggle-bars::after{top:5px}
.nav-toggle.is-open .nav-toggle-bars{background:transparent}
.nav-toggle.is-open .nav-toggle-bars::before{transform:translateY(5px) rotate(45deg)}
.nav-toggle.is-open .nav-toggle-bars::after{transform:translateY(-5px) rotate(-45deg)}

/* 栏目胶囊 */
.site-nav{
  display:flex;align-items:center;gap:6px;
  padding:6px;border-radius:var(--pill);
  background:rgba(6,18,31,.8);border:1px solid var(--line);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  box-shadow:0 12px 34px -20px rgba(0,0,0,.95);
}
.nav-list{display:flex;align-items:center;gap:2px;flex-wrap:nowrap}
.nav-list a{
  display:block;padding:9px 14px;border-radius:var(--pill);
  font-size:14px;font-weight:500;color:var(--mist);white-space:nowrap;
  transition:color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.nav-list a:hover{color:var(--white);background:rgba(53,242,230,.12)}
.nav-list a[aria-current="page"]{color:var(--ink-900);background:var(--cyan);font-weight:700}

.nav-quick{
  display:flex;align-items:center;gap:4px;
  padding-left:8px;margin-left:4px;border-left:1px solid var(--line-soft);
}
.quick-link{
  display:inline-block;padding:8px 13px;border-radius:var(--pill);
  font-size:12.5px;font-weight:700;letter-spacing:.02em;white-space:nowrap;
  border:1px solid transparent;
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.quick-link--cyan{color:var(--cyan);border-color:rgba(53,242,230,.4);background:rgba(53,242,230,.07)}
.quick-link--cyan:hover{background:var(--cyan);border-color:var(--cyan);color:var(--ink-900)}
.quick-link--lime{color:var(--lime);border-color:rgba(215,255,63,.36);background:rgba(215,255,63,.06)}
.quick-link--lime:hover{background:var(--lime);border-color:var(--lime);color:var(--ink-900)}
.quick-link--ghost{color:var(--mist);border-color:var(--line)}
.quick-link--ghost:hover{color:var(--white);border-color:var(--cyan)}

/* 滚动进度线 */
.scroll-progress{
  position:absolute;left:0;right:0;bottom:0;height:2px;
  background:linear-gradient(90deg,var(--cyan),var(--cyan-dim) 55%,var(--lime));
  transform:scaleX(0);transform-origin:0 50%;
  opacity:.9;pointer-events:none;
}

/* ==========================================================================
   页脚：编辑部索引剖面
   ========================================================================== */
.site-footer{
  position:relative;
  margin-top:clamp(52px,7vw,110px);
  background:var(--ink-800);
  border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;
  width:min(42%,420px);height:2px;
  background:linear-gradient(90deg,var(--orange),var(--cyan) 68%,transparent);
}
.footer-shell{
  width:100%;max-width:var(--shell);margin-inline:auto;
  padding:clamp(34px,4.6vw,62px) var(--gutter) 26px;
}

.footer-top{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:14px 28px;
  padding-bottom:clamp(18px,3vw,30px);
  border-bottom:1px solid var(--line-soft);
}
.footer-brand{display:flex;align-items:baseline;gap:14px}
.footer-brand-name{
  font-family:var(--f-serif);font-size:clamp(20px,2.6vw,30px);font-weight:700;letter-spacing:.01em;color:var(--white);
}
.footer-brand-note{font-size:14px;line-height:1.6;color:var(--mist);max-width:36ch}

.footer-grid{
  display:grid;grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(20px,3vw,40px);
  padding-block:clamp(22px,3.4vw,40px);
}
.footer-col{grid-column:span 3;min-width:0}
.footer-col--wide{grid-column:span 6}
.footer-col-title{
  font-family:var(--f-mono);font-size:11px;font-weight:600;letter-spacing:.24em;
  text-transform:uppercase;color:var(--cyan);margin-bottom:16px;
}
.footer-list{display:grid;gap:10px}
.footer-list a{color:var(--mist);font-size:14.5px;transition:color var(--dur) var(--ease)}
.footer-list a:hover{color:var(--cyan)}

.footer-contact{display:grid;gap:12px}
.contact-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;min-width:0}
.contact-row--stack{align-items:flex-start}
.contact-label{
  flex:0 0 auto;
  font-family:var(--f-mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--mist);opacity:.75;
}
.contact-value{
  font-family:var(--f-mono);font-size:14px;color:var(--white);
  font-variant-numeric:tabular-nums;word-break:break-word;min-width:0;
}
.contact-row--stack .contact-value{
  font-family:var(--f-sans);font-size:14.5px;line-height:1.6;color:var(--mist);max-width:32ch;
}
.copy-btn{
  padding:3px 10px;border:1px solid var(--line);border-radius:2px;
  font-family:var(--f-mono);font-size:10.5px;letter-spacing:.12em;
  color:var(--mist);transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.copy-btn:hover{border-color:var(--cyan);color:var(--cyan)}
.copy-btn.is-copied{border-color:var(--lime);color:var(--lime)}

.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 24px;
  padding-top:20px;border-top:1px solid var(--line-soft);
  font-family:var(--f-mono);font-size:12px;letter-spacing:.06em;color:var(--mist);
}
.footer-meta{margin-right:auto}
.footer-legal{color:var(--mist)}
.footer-icp{color:var(--mist);opacity:.8}
.to-top{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 16px;border:1px solid var(--line);border-radius:var(--pill);
  font-family:var(--f-sans);font-size:12.5px;font-weight:600;color:var(--white);
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.to-top::before{content:"↑";font-family:var(--f-mono);color:var(--cyan);line-height:1}
.to-top:hover{border-color:var(--cyan);color:var(--cyan);background:rgba(53,242,230,.08)}

/* ==========================================================================
   动效钩子
   ========================================================================== */
.js [data-reveal]{
  opacity:0;transform:translateY(16px);
  transition:opacity 240ms var(--ease),transform 240ms var(--ease);
}
.js [data-reveal].is-in{opacity:1;transform:none}

[data-toc] a[aria-current="true"]{color:var(--cyan)}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width:1200px){
  .nav-quick{display:none}
}

@media (max-width:960px){
  .site-header{padding-top:8px}
  .header-shell{padding-inline:clamp(12px,4vw,20px)}
  .nav-toggle{display:inline-flex}

  .site-nav{
    position:absolute;left:clamp(12px,4vw,20px);right:clamp(12px,4vw,20px);
    top:100%;margin-top:10px;
    flex-direction:column;align-items:stretch;gap:8px;
    padding:14px;border-radius:20px;
    background:rgba(6,18,31,.985);
    box-shadow:0 28px 64px -30px #000;
    max-height:calc(100vh - 130px);overflow-y:auto;
    opacity:0;visibility:hidden;transform:translateY(-10px);
    transition:opacity 180ms var(--ease),transform 180ms var(--ease),visibility 180ms;
  }
  .site-nav[data-open="true"]{opacity:1;visibility:visible;transform:none}

  .nav-list{flex-direction:column;align-items:stretch;gap:2px}
  .nav-list a{padding:12px 14px;border-radius:12px;font-size:15.5px}
  .nav-list a[aria-current="page"]{border-radius:12px}

  .nav-quick{
    display:flex;flex-direction:column;align-items:stretch;gap:6px;
    padding:10px 0 0;margin:0;border-left:0;border-top:1px solid var(--line-soft);
  }
  .quick-link{text-align:center;padding:10px}

  .footer-col{grid-column:span 6}
  .footer-col--wide{grid-column:span 12}
}

@media (max-width:720px){
  .footer-grid{grid-template-columns:repeat(6,minmax(0,1fr))}
  .footer-col,.footer-col--wide{grid-column:span 6}
  .footer-brand-name{font-size:20px}
}

@media (max-width:640px){
  body{background-size:64px 64px}
  .brand-name{font-size:15px}
  .brand-sub{font-size:9px;letter-spacing:.2em}
  .footer-top{flex-direction:column;align-items:flex-start}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:12px}
  .footer-meta{margin-right:0}
  .to-top{align-self:stretch;justify-content:center}
  .contact-row--stack .contact-value{max-width:none}
}

/* ==========================================================================
   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;
  }
  .js [data-reveal]{opacity:1;transform:none}
  .btn:hover{transform:none}
  .scroll-progress{transition:none}
}