/* ==========================================================================
   大江体育 / assets/site.css  —  共享外壳 + 基础组件
   语义：夜色墨绿长卷 · 红黄牌记录语汇 · 等宽索引
   ========================================================================== */

:root{
  /* 色彩令牌 */
  --ink:#0B1F17;
  --ink-2:#132A20;
  --char:#0A0C0B;
  --red:#D2262F;
  --red-bright:#E6323B;
  --yellow:#F2C300;
  --white:#F6F8F6;
  --mist:#A9B7AE;
  --line:#2E4A3C;
  --light:#E7ECE8;
  --gray:#6B7F73;

  /* 字体 */
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"SFMono-Regular","JetBrains Mono",Menlo,Consolas,"Liberation Mono","Courier New",monospace;

  /* 尺度 */
  --wrap-max:1240px;
  --gutter:24px;
  --pad-x:40px;
  --ease:cubic-bezier(0.2,0.7,0.2,1);
  --dur:320ms;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink);
  color:var(--white);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img,svg,video{display:block;max-width:100%}
h1,h2,h3,h4,p,figure,blockquote{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
hr{border:0;margin:0}
::selection{background:var(--yellow);color:var(--ink)}

:focus-visible{outline:2px solid var(--yellow);outline-offset:3px}

/* ---------- 中文排版基础 ---------- */
.display-1{font-family:var(--font-display);font-size:clamp(34px,5.2vw,56px);line-height:1.05;font-weight:800;letter-spacing:-.02em}
.display-2{font-family:var(--font-display);font-size:clamp(26px,3.4vw,40px);line-height:1.1;font-weight:800;letter-spacing:-.015em}
.display-3{font-family:var(--font-display);font-size:clamp(20px,2.3vw,28px);line-height:1.3;font-weight:700;letter-spacing:-.01em}
.lede{max-width:38ch;font-size:17px;line-height:1.9;color:var(--mist)}
.mono-label{
  font-family:var(--font-mono);
  font-size:11px;
  line-height:1.4;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--mist);
  white-space:nowrap;
}
.mono-label--dim{color:var(--gray)}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--yellow);
}
.eyebrow::before{content:"";width:8px;height:8px;background:var(--red);border-radius:1px;flex:0 0 auto}

/* ---------- 布局 ---------- */
.wrap{width:100%;max-width:var(--wrap-max);margin:0 auto;padding:0 var(--pad-x)}
.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:var(--gutter)}

.section{padding:88px 0}
.section--tight{padding:52px 0}
.section--alt{background:var(--ink-2);color:var(--white)}
.section--char{background:var(--char);color:var(--white)}
.section--light{background:var(--light);color:var(--ink)}
.section--light .lede,.section--light .mono-label{color:var(--gray)}

.rule{height:1px;background:var(--line);width:100%}
.band-accent{display:flex;height:8px;overflow:hidden}
.band-accent > span:nth-child(1){flex:0 0 14%;background:var(--red)}
.band-accent > span:nth-child(2){flex:0 0 9%;background:var(--yellow)}
.band-accent > span:nth-child(3){flex:1 1 auto;background:var(--line)}

/* ---------- 跳过链接 ---------- */
.skip-link{
  position:fixed;
  top:10px;left:10px;
  z-index:300;
  padding:10px 18px;
  background:var(--yellow);
  color:var(--ink);
  font-size:14px;
  font-weight:700;
  letter-spacing:.04em;
  border-radius:4px;
  transform:translateY(-180%);
  transition:transform .18s var(--ease);
}
.skip-link:focus{transform:translateY(0);outline-color:var(--white)}

/* ---------- 头部 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:120;
  background:var(--ink);
  border-bottom:1px solid var(--line);
}

/* 顶置情报带 */
.header-strip{
  background:var(--char);
  border-bottom:1px solid var(--line);
  overflow:hidden;
  max-height:44px;
  opacity:1;
  transition:max-height var(--dur) var(--ease),opacity 220ms var(--ease),border-color var(--dur) var(--ease);
}
.site-header[data-compact="true"] .header-strip{max-height:0;opacity:0;border-bottom-color:transparent}
.strip-inner{display:flex;align-items:center;gap:14px;height:44px}
.strip-line{flex:0 0 20px;height:1px;background:var(--line)}
.strip-line--grow{flex:1 1 auto;max-width:60px}
.strip-spacer{flex:1 1 auto}
.strip-chip{
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.14em;
  color:var(--mist);
  white-space:nowrap;
}
.chip{display:inline-block;width:6px;height:11px;border-radius:1px;flex:0 0 auto}
.chip--red{background:var(--red)}
.chip--yellow{background:var(--yellow)}

/* 悬浮胶囊 */
.header-wrap{padding-top:14px;padding-bottom:14px}
.nav-pill{
  position:relative;
  display:flex;
  align-items:center;
  gap:20px;
  padding:10px 10px 10px 20px;
  background:rgba(19,42,32,.92);
  border:1px solid var(--line);
  border-radius:999px;
  box-shadow:0 22px 48px -28px rgba(0,0,0,.95);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  transition:padding var(--dur) var(--ease);
}
.site-header[data-compact="true"] .nav-pill{padding:8px 8px 8px 16px}

.brand{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto;min-width:0}
.brand-mark{display:inline-flex;align-items:flex-end;gap:3px;flex:0 0 auto}
.brand-mark i{display:block;width:9px;height:26px;border-radius:2px;background:var(--yellow)}
.brand-mark i:first-child{height:19px;background:var(--red)}
.brand-words{display:flex;flex-direction:column;min-width:0}
.brand-name{font-family:var(--font-display);font-size:17px;font-weight:800;letter-spacing:.06em;line-height:1.2}
.brand-sub{font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;color:var(--mist);line-height:1.5;white-space:nowrap}

.nav-list{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav-link{
  display:block;
  padding:8px 13px;
  font-size:14px;
  letter-spacing:.04em;
  color:var(--mist);
  border-radius:999px;
  transition:color 180ms var(--ease),background 180ms var(--ease);
}
.nav-link:hover{color:var(--white);background:rgba(246,248,246,.07)}
.nav-link:focus-visible{color:var(--white)}
.nav-link[aria-current="page"]{
  color:var(--ink);
  background:var(--yellow);
  font-weight:700;
}
.nav-link[aria-current="page"]:hover{color:var(--ink);background:var(--yellow)}

.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  min-height:44px;
  padding:0 15px;
  border:1px solid var(--line);
  border-radius:999px;
  color:var(--white);
  flex:0 0 auto;
}
.nav-toggle:hover{border-color:var(--mist)}
.nav-toggle-label{font-family:var(--font-mono);font-size:11px;letter-spacing:.16em}
.nav-toggle-bars{display:block;position:relative;width:18px;height:12px;flex:0 0 auto}
.nav-toggle-bars span{
  position:absolute;left:0;right:0;height:2px;border-radius:2px;
  background:currentColor;
  transition:transform 220ms var(--ease),opacity 220ms var(--ease);
}
.nav-toggle-bars span:first-child{top:0}
.nav-toggle-bars span:last-child{bottom:0}
[data-nav][data-open] .nav-toggle-bars span:first-child{transform:translateY(5px) rotate(45deg)}
[data-nav][data-open] .nav-toggle-bars span:last-child{transform:translateY(-5px) rotate(-45deg)}
[data-nav][data-open] .nav-toggle{background:var(--yellow);color:var(--ink);border-color:var(--yellow)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  min-height:44px;
  padding:0 20px;
  font-size:14px;
  font-weight:700;
  letter-spacing:.06em;
  line-height:1.2;
  border:1px solid var(--line);
  border-radius:999px;
  color:var(--white);
  transition:background 180ms var(--ease),color 180ms var(--ease),border-color 180ms var(--ease),transform 180ms var(--ease);
}
.btn:hover{transform:translateY(-1px)}
.btn--primary{background:var(--red);border-color:var(--red);color:var(--white)}
.btn--primary:hover{background:var(--red-bright);border-color:var(--red-bright)}
.btn--line{background:transparent;border-color:var(--mist);color:var(--white)}
.btn--line:hover{background:var(--white);color:var(--ink);border-color:var(--white)}
.btn--ghost{background:rgba(246,248,246,.06);border-color:transparent;color:var(--white)}
.btn--ghost:hover{background:rgba(246,248,246,.12)}
.nav-cta{flex:0 0 auto;min-height:38px;padding:0 18px;font-size:13px}

/* ---------- 面包屑 ---------- */
.crumbs{margin-bottom:28px}
.crumbs-list{display:flex;flex-wrap:wrap;align-items:center;gap:0;font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--gray)}
.crumbs-item{display:inline-flex;align-items:center}
.crumbs-item + .crumbs-item::before{content:"/";margin:0 9px;color:var(--line)}
.crumbs-item a{color:var(--mist);transition:color 160ms var(--ease)}
.crumbs-item a:hover{color:var(--yellow)}
.crumbs-item [aria-current="page"]{color:var(--yellow)}

/* ---------- 切角面板 ---------- */
.panel{
  position:relative;
  background:var(--ink-2);
  border:1px solid var(--line);
  padding:28px;
  clip-path:polygon(0 0,calc(100% - 20px) 0,100% 20px,100% 100%,20px 100%,0 calc(100% - 20px));
}
.panel--light{background:var(--white);color:var(--ink);border-color:#C9D4CC}
.panel--flag{border-left:4px solid var(--yellow)}

/* ---------- 图片容器基础规则 ---------- */
.media{
  position:relative;
  overflow:hidden;
  width:100%;
  background:var(--ink-2);
  border:1px solid var(--line);
  clip-path:polygon(0 0,calc(100% - 22px) 0,100% 22px,100% 100%,0 100%);
}
.media > img,
.media > picture,
.media > picture > img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
  filter:saturate(.94) contrast(1.04);
}
.media--wide{aspect-ratio:16/9}
.media--tall{aspect-ratio:4/5}
.media--band{aspect-ratio:21/9}
.media--square{aspect-ratio:1/1}
.media-caption{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--gray);
  line-height:1.6;
}

/* ---------- 滚动进度 ---------- */
.scroll-progress{
  position:fixed;
  top:0;left:0;
  width:100%;height:3px;
  transform-origin:0 50%;
  transform:scaleX(0);
  background:var(--red);
  z-index:250;
  pointer-events:none;
  transition:transform 90ms linear;
}

/* ---------- 入场显现（JS 就绪后才隐藏，保证无 JS 可见） ---------- */
[data-reveal-ready]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease);
}
[data-reveal-ready][data-revealed]{opacity:1;transform:none}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--char);
  color:var(--white);
  padding:0 0 56px;
}
.footer-band{display:flex;height:8px;margin-bottom:0}
.footer-band > span:nth-child(1){flex:0 0 13%;background:var(--red)}
.footer-band > span:nth-child(2){flex:0 0 9%;background:var(--yellow)}
.footer-band > span:nth-child(3){flex:1 1 auto;background:var(--line)}

.footer-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  padding:48px 0 36px;
  border-bottom:1px solid rgba(46,74,60,.55);
}
.footer-brand{display:inline-flex;align-items:center;gap:12px}
.footer-note{
  max-width:34ch;
  font-size:15px;
  line-height:1.8;
  color:var(--mist);
}

.footer-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:32px;
  padding:44px 0 40px;
  border-bottom:1px solid rgba(46,74,60,.55);
}
.footer-col-title{
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--yellow);
  margin-bottom:20px;
}
.footer-links li + li{margin-top:12px}
.footer-links a{
  font-size:15px;
  color:var(--mist);
  transition:color 160ms var(--ease);
}
.footer-links a:hover{color:var(--white)}
.footer-links a:focus-visible{color:var(--white)}

.footer-contact{
  display:flex;
  flex-wrap:wrap;
  gap:8px 36px;
  padding:30px 0;
  border-bottom:1px solid rgba(46,74,60,.55);
}
.footer-contact-line{
  display:inline-flex;
  align-items:baseline;
  gap:12px;
  font-size:15px;
  color:var(--white);
  word-break:break-word;
}
.footer-contact-key{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--gray);
  flex:0 0 auto;
}
.footer-contact-note{
  flex:1 1 100%;
  font-size:13px;
  line-height:1.75;
  color:var(--gray);
  max-width:60ch;
}

.footer-legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding-top:26px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--gray);
}
.footer-legal-id{color:var(--mist)}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width:1100px){
  :root{--pad-x:32px}
  .nav-pill{gap:14px;padding:9px 9px 9px 16px}
  .nav-link{padding:8px 10px;font-size:13px}
  .nav-cta{min-height:36px;padding:0 15px;font-size:12px}
}

@media (max-width:900px){
  :root{--pad-x:20px;--dur:280ms}

  .section{padding:64px 0}
  .section--tight{padding:40px 0}

  /* 头部：底部浮动胶囊 + 上方抽屉 */
  .site-header{border-bottom:0;background:transparent}
  .header-strip{max-height:40px}
  .strip-inner{height:40px;gap:10px}
  .strip-chip--optional{display:none}
  .header-wrap{
    position:fixed;
    left:0;right:0;bottom:0;
    z-index:150;
    width:auto;
    max-width:none;
    margin:0;
    padding:0 14px 14px;
  }
  .nav-pill{
    gap:10px;
    padding:8px 8px 8px 14px;
    border-radius:999px;
    box-shadow:0 -14px 40px -22px rgba(0,0,0,.95),0 18px 40px -24px rgba(0,0,0,.9);
  }
  .brand{flex:1 1 auto;margin-right:0}
  .brand-mark i{width:7px;height:22px}
  .brand-mark i:first-child{height:16px}
  .brand-name{font-size:15px}
  .brand-sub{font-size:9px;letter-spacing:.12em}
  .nav-cta{flex:0 0 auto;min-height:38px;padding:0 14px;font-size:12px;letter-spacing:.02em}
  .nav-toggle{display:inline-flex;min-height:40px;padding:0 13px}
  .nav-toggle-label{display:none}

  .nav-list{
    position:absolute;
    left:0;right:0;
    bottom:calc(100% + 12px);
    display:grid;
    grid-template-columns:1fr;
    gap:4px;
    margin:0;
    padding:12px;
    background:var(--ink-2);
    border:1px solid var(--line);
    border-radius:22px;
    box-shadow:0 -12px 48px -20px rgba(0,0,0,.95);
    opacity:0;
    visibility:hidden;
    transform:translateY(12px);
    transition:opacity 220ms var(--ease),transform 220ms var(--ease),visibility 220ms linear;
  }
  [data-nav][data-open] .nav-list{
    opacity:1;
    visibility:visible;
    transform:none;
  }
  .nav-link{
    padding:13px 16px;
    border-radius:14px;
    font-size:16px;
    color:var(--white);
  }
  .nav-link[aria-current="page"]{border-radius:14px}

  body{padding-bottom:96px}

  /* 页脚 */
  .site-footer{padding-bottom:32px}
  .footer-head{padding:36px 0 28px}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px 24px;padding:36px 0 32px}
  .footer-contact{padding:26px 0}
  .footer-legal{padding-top:22px}
  .scroll-progress{height:2px}
}

@media (max-width:620px){
  body{font-size:16px;line-height:1.85}
  .wrap{padding:0 18px}
  .header-wrap{padding:0 10px 12px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-contact-line{display:flex;flex-direction:column;gap:2px;font-size:14px}
  .footer-contact-key{margin-bottom:0}
  .footer-legal{flex-direction:column;align-items:flex-start;gap:8px}
  .display-1{font-size:clamp(28px,8vw,40px)}
  .display-2{font-size:clamp(24px,6.5vw,32px)}
  .panel{padding:22px 20px}
  .media--band{aspect-ratio:16/9}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  [data-reveal-ready]{opacity:1;transform:none}
  .btn:hover{transform:none}
  .scroll-progress{transition:none}
}