/* ============================================================
   小鸟体育综合 · 共享样式 /assets/site.css
   设计系统：暖纸底 + 深墨蓝 + 赛场绿，荧光黄数据高亮
   ============================================================ */

:root{
  --paper:#F5F1E6;
  --ink:#0A1A2A;
  --night:#12314F;
  --green:#17875B;
  --grass:#3FBF7F;
  --orange:#FF6A2B;
  --neon:#E9FF4F;
  --red:#D0342C;
  --white:#FFFDF8;
  --gray:#5B6675;
  --mist:#DCE9E0;
  --line:rgba(10,26,42,.14);
  --line-soft:rgba(10,26,42,.08);
  --on-dark:rgba(245,241,230,.78);
  --on-dark-soft:rgba(245,241,230,.5);
  --font-cn:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --radius:24px;
  --radius-pill:999px;
  --maxw:1240px;
  --gutter:24px;
  --shadow:0 18px 40px rgba(10,26,42,.12);
  --shadow-lg:0 26px 56px rgba(10,26,42,.18);
  --ease:cubic-bezier(.22,.8,.3,1);
}

/* ---------------- RESET ---------------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;background:var(--paper)}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:17px;
  line-height:1.75;
  color:var(--ink);
  background-color:var(--paper);
  background-image:
    linear-gradient(rgba(10,26,42,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(10,26,42,.045) 1px,transparent 1px);
  background-size:72px 72px;
  background-position:-1px -1px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg,video{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5{margin:0;font-weight:900;line-height:1.12;letter-spacing:-.02em}
p{margin:0}
hr{border:0;border-top:1px solid var(--line);margin:32px 0}
::selection{background:var(--neon);color:var(--ink)}
:focus-visible{outline:2px solid var(--neon);outline-offset:2px;box-shadow:0 0 0 4px rgba(10,26,42,.5);border-radius:6px}

/* ---------------- 排版工具 ---------------- */
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.muted{color:var(--gray)}
.t-hero{font-size:clamp(38px,6.6vw,84px);font-weight:900;line-height:1.02;letter-spacing:-.035em}
.t-xl{font-size:clamp(28px,3.6vw,56px);font-weight:900;line-height:1.06;letter-spacing:-.03em}
.t-lg{font-size:clamp(21px,2.2vw,32px);font-weight:800;line-height:1.2}
.t-md{font-size:19px;font-weight:700;line-height:1.4}
.t-body{font-size:17px;line-height:1.75}
.t-small{font-size:14px;line-height:1.7;color:var(--gray)}

.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:11px;font-weight:600;
  letter-spacing:.18em;text-transform:uppercase;color:var(--green);
}
.eyebrow::before{content:"";width:24px;height:2px;background:var(--orange)}

.chapter-num{
  font-family:var(--font-mono);font-weight:600;font-variant-numeric:tabular-nums;
  font-size:clamp(44px,7vw,96px);line-height:.88;letter-spacing:-.04em;color:var(--green);
}
.chapter-num--neon{color:var(--neon)}
.chapter-num--ink{color:var(--ink)}

/* ---------------- 布局容器 ---------------- */
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 var(--gutter)}
.section{padding:clamp(48px,7vw,96px) 0}
.section--tight{padding:clamp(28px,4vw,52px) 0}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;gap:16px 32px;margin-bottom:32px}
.grid-2{display:grid;gap:clamp(16px,2.4vw,28px);grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{display:grid;gap:clamp(16px,2.4vw,28px);grid-template-columns:repeat(3,minmax(0,1fr))}
@media (max-width:980px){.grid-3{grid-template-columns:1fr}}
@media (max-width:760px){.grid-2{grid-template-columns:1fr}}

.band{background:var(--ink);color:var(--paper)}
.band--night{background:var(--night);color:var(--paper)}
.band--green{background:var(--green);color:#fff}
.band--mist{background:var(--mist)}

.prose{max-width:68ch;font-size:17px;line-height:1.8}
.prose p+p{margin-top:1em}
.prose h2{margin:1.6em 0 .5em;font-size:clamp(22px,2.4vw,32px)}
.prose h3{margin:1.3em 0 .4em;font-size:20px}
.prose ul li{position:relative;padding-left:22px;margin:.45em 0}
.prose ul li::before{content:"";position:absolute;left:0;top:.75em;width:10px;height:2px;background:var(--orange)}
.prose a{color:var(--green);border-bottom:1px solid currentColor}
.prose a:hover{color:var(--orange)}
.prose strong{font-weight:800}

/* ---------------- 胶囊标签 ---------------- */
.pill{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--radius-pill);
  font-family:var(--font-mono);font-size:11px;font-weight:600;
  letter-spacing:.1em;text-transform:uppercase;white-space:nowrap;
  background:var(--mist);color:var(--ink);
}
.pill--ink{background:var(--ink);color:var(--paper)}
.pill--green{background:var(--green);color:#fff}
.pill--orange{background:var(--orange);color:var(--ink)}
.pill--neon{background:var(--neon);color:var(--ink)}
.pill--alert{background:var(--red);color:#fff}

/* ---------------- 按钮 ---------------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:700;line-height:1.2;
  border:1.5px solid transparent;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.btn--signal{background:var(--orange);color:var(--ink)}
.btn--signal:hover{background:var(--neon);color:var(--ink)}
.btn--ink{background:var(--ink);color:var(--paper)}
.btn--ink:hover{background:var(--green);color:#fff}
.btn--ghost{background:transparent;border-color:rgba(10,26,42,.25);color:var(--ink)}
.btn--ghost:hover{background:var(--green);border-color:var(--green);color:#fff}
.btn--sm{padding:8px 16px;font-size:13px}

/* ---------------- 卡片 ---------------- */
.card{
  position:relative;background:var(--white);
  border:1px solid rgba(10,26,42,.1);border-radius:var(--radius);
  padding:clamp(20px,2.4vw,28px);
  transition:box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.card::before{
  content:"";position:absolute;left:0;top:clamp(20px,2.4vw,28px);
  width:4px;height:36px;border-radius:0 4px 4px 0;background:var(--green);
  transition:transform .22s var(--ease),background-color .22s var(--ease);
}
.card:hover{border-color:rgba(23,135,91,.42);box-shadow:var(--shadow)}
.card:hover::before{transform:translateX(-5px);background:var(--orange)}
.card--ink{background:var(--ink);color:var(--paper);border-color:transparent}
.card--mist{background:var(--mist);border-color:transparent}

/* ---------------- 图片容器 ---------------- */
.media{
  position:relative;overflow:hidden;border-radius:var(--radius);
  background:var(--mist);isolation:isolate;
}
.media img{width:100%;height:100%;object-fit:cover;filter:saturate(.7) contrast(1.06)}
.media::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(10,26,42,0) 45%,rgba(10,26,42,.58) 100%);
}
.media--flat::after{display:none}
.media--16x9{aspect-ratio:16/9}
.media--4x3{aspect-ratio:4/3}
.media--1x1{aspect-ratio:1/1}
.media--3x4{aspect-ratio:3/4}
.media__frame{
  position:absolute;inset:12px;z-index:2;pointer-events:none;
  border:1px solid rgba(233,255,79,.6);border-radius:14px;
}
.media__tag{
  position:absolute;left:16px;bottom:16px;z-index:3;
  padding:6px 12px;border-radius:var(--radius-pill);
  background:rgba(10,26,42,.82);color:var(--paper);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;
}
.media--placeholder{
  display:grid;place-items:center;aspect-ratio:16/9;
  background:repeating-linear-gradient(135deg,var(--mist) 0 14px,#eef3ea 14px 28px);
  color:var(--gray);font-family:var(--font-mono);font-size:12px;
  letter-spacing:.14em;text-transform:uppercase;
}
.media--placeholder::after{display:none}

/* ---------------- 面包屑 ---------------- */
.breadcrumbs{padding:18px 0;font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--gray)}
.breadcrumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:6px}
.breadcrumbs li+li::before{content:"/";margin-right:6px;color:rgba(10,26,42,.3)}
.breadcrumbs a:hover{color:var(--green);border-bottom:1px solid var(--grass)}
.breadcrumbs [aria-current="page"]{color:var(--ink);font-weight:700}

/* ============================================================
   HEADER
   ============================================================ */
.skip-link{
  position:absolute;left:16px;top:-72px;z-index:200;
  padding:10px 18px;border-radius:var(--radius-pill);
  background:var(--neon);color:var(--ink);font-weight:800;font-size:14px;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:14px}

.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(245,241,230,.94);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .24s var(--ease);
}
.site-header[data-condensed]{box-shadow:0 12px 30px rgba(10,26,42,.14)}

.header-rail{
  display:flex;align-items:center;gap:20px;
  padding:6px var(--gutter);
  background:var(--ink);color:var(--paper);
  font-family:var(--font-mono);font-size:11px;font-weight:600;
  letter-spacing:.14em;text-transform:uppercase;
  white-space:nowrap;overflow:hidden;
}
.rail-item{display:inline-flex;align-items:center;gap:8px;color:var(--on-dark)}
.rail-item--end{margin-left:auto;color:var(--neon)}
.rail-dot{width:7px;height:7px;border-radius:50%;background:var(--orange);flex:0 0 auto}

.header-bar{position:relative;padding:14px var(--gutter)}
.header-inner{
  display:flex;align-items:center;gap:16px;
  width:100%;max-width:var(--maxw);margin:0 auto;
}

.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{font-size:20px;font-weight:900;letter-spacing:-.02em;transition:color .2s var(--ease)}
.brand-tag{
  font-family:var(--font-mono);font-size:10px;font-weight:700;letter-spacing:.14em;
  padding:3px 8px;border-radius:var(--radius-pill);
  background:var(--green);color:#fff;
}
.brand:hover .brand-mark{color:var(--green)}

.nav{display:block;margin-left:auto}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-item{flex:0 0 auto}
.nav-link{
  position:relative;display:block;
  padding:8px 13px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:600;line-height:1.3;color:var(--ink);
  transition:background-color .18s var(--ease),color .18s var(--ease);
  white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:13px;right:13px;bottom:4px;height:2px;
  background:var(--grass);transform:scaleX(0);transform-origin:left;
  transition:transform .2s var(--ease);
}
.nav-link:hover{color:var(--green)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{background:var(--ink);color:var(--paper)}
.nav-link[aria-current="page"]::after{background:var(--neon);transform:scaleX(1)}
.nav-num{display:none}
@media (min-width:1081px){
  .nav-num{
    display:inline-block;margin-right:7px;
    font-family:var(--font-mono);font-size:10px;font-weight:600;
    letter-spacing:.08em;color:var(--green);
  }
  .nav-link[aria-current="page"] .nav-num{color:var(--neon)}
}

.header-tools{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.league-chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 14px;border-radius:var(--radius-pill);
  border:1.5px solid rgba(10,26,42,.2);background:var(--white);
  font-family:var(--font-mono);font-size:12px;font-weight:600;letter-spacing:.06em;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.league-chip:hover{border-color:var(--green);color:var(--green)}
.league-chip[aria-expanded="true"]{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.league-chip__dot{width:7px;height:7px;border-radius:50%;background:var(--orange);flex:0 0 auto}
.league-chip__label{white-space:nowrap}

.league-panel{
  position:absolute;top:calc(100% + 8px);right:var(--gutter);z-index:20;
  width:min(460px,calc(100vw - 32px));
  padding:18px;border-radius:var(--radius);
  background:var(--white);border:1px solid rgba(10,26,42,.12);
  box-shadow:var(--shadow-lg);
}
.league-panel[hidden]{display:none}
.league-panel__title{
  font-family:var(--font-mono);font-size:11px;font-weight:600;
  letter-spacing:.16em;text-transform:uppercase;color:var(--green);
  margin-bottom:12px;
}
.league-panel__grid{display:flex;flex-wrap:wrap;gap:8px}
.league-option{
  padding:8px 15px;border-radius:var(--radius-pill);
  border:1.5px solid rgba(10,26,42,.16);
  font-family:var(--font-mono);font-size:12px;font-weight:600;letter-spacing:.06em;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.league-option:hover{border-color:var(--green);color:var(--green)}
.league-option[aria-pressed="true"]{background:var(--green);border-color:var(--green);color:#fff}

.nav-toggle{
  display:none;position:relative;flex:0 0 auto;
  width:44px;height:44px;border-radius:var(--radius-pill);
  border:1.5px solid rgba(10,26,42,.22);background:var(--white);
  transition:background-color .2s var(--ease),border-color .2s var(--ease);
}
.nav-toggle__bar{
  position:absolute;left:13px;width:18px;height:2px;border-radius:2px;
  background:var(--ink);
  transition:transform .22s var(--ease),opacity .18s var(--ease),background-color .2s var(--ease);
}
.nav-toggle__bar:nth-child(1){top:16px}
.nav-toggle__bar:nth-child(2){top:21px}
.nav-toggle__bar:nth-child(3){top:26px}
.site-header[data-open] .nav-toggle{background:var(--ink);border-color:var(--ink)}
.site-header[data-open] .nav-toggle__bar{background:var(--neon)}
.site-header[data-open] .nav-toggle__bar:nth-child(1){transform:translateY(5px) rotate(45deg)}
.site-header[data-open] .nav-toggle__bar:nth-child(2){opacity:0}
.site-header[data-open] .nav-toggle__bar:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

.scroll-progress{
  position:absolute;left:0;right:0;bottom:-1px;height:3px;
  background:rgba(10,26,42,.08);overflow:hidden;
}
.scroll-progress__bar{
  display:block;width:100%;height:100%;
  background:linear-gradient(90deg,var(--green),var(--grass) 55%,var(--neon));
  transform:scaleX(0);transform-origin:left;
  transition:transform .1s linear;
}

.site-header[data-condensed] .header-rail{display:none}
.site-header[data-condensed] .header-bar{padding-top:8px;padding-bottom:8px}
.site-header[data-condensed] .brand-mark{font-size:18px}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer{
  position:relative;margin-top:clamp(56px,8vw,104px);
  background:var(--night);color:var(--on-dark);
}
.site-footer::before{
  content:"";display:block;height:3px;
  background:linear-gradient(90deg,var(--neon),var(--grass) 35%,var(--green) 65%,rgba(23,135,91,0) 100%);
}
.footer-inner{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;
  gap:44px 32px;
  width:100%;max-width:var(--maxw);margin:0 auto;
  padding:clamp(44px,6vw,72px) var(--gutter) 40px;
}
.footer-col{min-width:0}
.footer-brand .brand-mark{display:inline-block;font-size:22px;color:var(--paper);letter-spacing:-.02em}
.footer-statement{margin-top:14px;max-width:30ch;font-size:15px;line-height:1.8;color:var(--on-dark)}
.footer-meta{
  margin-top:16px;font-family:var(--font-mono);font-size:11px;font-weight:600;
  letter-spacing:.14em;text-transform:uppercase;color:var(--on-dark-soft);
}
.footer-heading{
  font-family:var(--font-mono);font-size:11px;font-weight:600;
  letter-spacing:.18em;text-transform:uppercase;color:var(--neon);
  margin-bottom:16px;
}
.footer-list{display:grid;gap:11px}
.footer-list--two{grid-template-columns:repeat(2,minmax(0,1fr));gap:11px 18px}

.footer-link{
  position:relative;display:inline-block;
  font-size:15px;color:var(--on-dark);
  transition:color .18s var(--ease);
}
.footer-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-3px;height:1px;
  background:var(--neon);transform:scaleX(0);transform-origin:left;
  transition:transform .2s var(--ease);
}
.footer-link:hover{color:var(--paper)}
.footer-link:hover::after{transform:scaleX(1)}

.block-link{
  display:flex;align-items:center;gap:12px;
  padding:10px 14px;border-radius:16px;
  background:rgba(255,253,248,.06);border:1px solid rgba(255,253,248,.13);
  transition:background-color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.block-link:hover{
  background:rgba(233,255,79,.12);
  border-color:rgba(233,255,79,.5);
  transform:translateX(3px);
}
.block-link__tag{font-family:var(--font-mono);font-size:11px;font-weight:600;letter-spacing:.1em;color:var(--neon)}
.block-link__label{font-size:15px;font-weight:700;color:var(--paper)}

.footer-contact{display:grid;gap:12px}
.footer-contact__item{display:grid;grid-template-columns:52px minmax(0,1fr);gap:12px;align-items:start}
.footer-contact__term{
  padding-top:3px;
  font-family:var(--font-mono);font-size:11px;font-weight:600;
  letter-spacing:.12em;text-transform:uppercase;color:var(--neon);
}
.footer-contact__value{font-size:15px;line-height:1.6;color:var(--on-dark);word-break:break-word}

.footer-bottom{border-top:1px solid rgba(233,255,79,.28)}
.footer-bottom-inner{
  display:flex;flex-wrap:wrap;gap:8px 24px;
  width:100%;max-width:var(--maxw);margin:0 auto;
  padding:18px var(--gutter);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;color:var(--on-dark-soft);
}
.footer-care{color:var(--neon)}

/* ============================================================
   显现动效
   ============================================================ */
[data-reveal]{
  transition:opacity .55s var(--ease),transform .55s var(--ease);
}
[data-reveal][data-state="out"]{opacity:0;transform:translateY(22px)}
[data-reveal][data-state="in"]{opacity:1;transform:none}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1080px){
  .footer-inner{grid-template-columns:1fr 1fr}
}
@media (max-width:900px){
  :root{--gutter:16px}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center}
  .header-inner{gap:12px}
  .brand-mark{font-size:19px}
  .header-tools{order:2}
  .header-tools .btn{display:none}
  .league-panel{right:16px;left:16px;width:auto}

  .nav{
    position:absolute;left:0;right:0;top:100%;margin-left:0;
    background:var(--paper);
    border-bottom:1px solid var(--line);
    box-shadow:var(--shadow-lg);
    padding:0 var(--gutter);
    max-height:0;overflow:hidden;
    transition:max-height .32s var(--ease);
  }
  .site-header[data-open] .nav{max-height:min(78vh,640px);overflow-y:auto;padding-bottom:22px}
  .nav-list{flex-direction:column;align-items:stretch;gap:0;padding-top:10px}
  .nav-item{border-bottom:1px solid var(--line-soft)}
  .nav-item:last-child{border-bottom:0}
  .nav-link{
    display:flex;align-items:baseline;gap:14px;
    padding:15px 4px;border-radius:0;
    font-size:20px;font-weight:900;letter-spacing:-.01em;
  }
  .nav-link::after{display:none}
  .nav-link:hover{color:var(--green)}
  .nav-link[aria-current="page"]{background:transparent;color:var(--green)}
  .nav-num{
    display:inline-block;flex:0 0 auto;
    font-family:var(--font-mono);font-size:12px;font-weight:600;
    letter-spacing:.1em;color:var(--green);
  }
  .nav-link[aria-current="page"] .nav-num{color:var(--orange)}
}
@media (max-width:640px){
  .header-rail{gap:12px;font-size:10px}
  .rail-item:nth-child(2){display:none}
  .footer-inner{grid-template-columns:1fr;gap:34px}
  .brand-tag{padding:2px 6px}
}
@media (max-width:420px){
  .league-chip{padding:7px 11px;font-size:11px}
  .brand-mark{font-size:17px}
}

/* ============================================================
   无障碍与减弱动效
   ============================================================ */
@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][data-state="out"]{opacity:1;transform:none}
  .scroll-progress__bar{transition:none}
}