/* ==========================================================================
   大江体育 · 共享站点样式 /assets/site.css
   墨江深蓝 / 江潮青 / 赛道橙红 · 等距水纹 + 斜切色带 + Bento 板
   ========================================================================== */

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body,h1,h2,h3,h4,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}

/* ---------- tokens ---------- */
:root{
  --ink:#0B1B26;
  --teal:#0E6E63;
  --teal-soft:#2FA79A;
  --orange:#E4502A;
  --amber:#F2A63B;
  --indigo:#23306B;
  --wine:#5C1F33;
  --mist:#F5F8F7;
  --line:#D6E5E1;
  --text:#12212B;

  --shell-max:1280px;
  --shell-pad:clamp(18px,4vw,44px);
  --r-s:8px;
  --r-m:14px;
  --r-l:22px;
  --header-h:78px;
  --shadow-1:0 18px 46px rgba(11,27,38,.14);
  --shadow-2:0 24px 60px rgba(11,27,38,.32);
  --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-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
  --ease:cubic-bezier(.22,.68,.24,1);
}

/* ---------- base typography ---------- */
html{scroll-behavior:smooth}
html.nav-open,html.nav-open body{overflow:hidden}
body{
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.75;
  color:var(--text);
  background:var(--mist);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-weight:900;line-height:1.1;letter-spacing:-.02em}
h1{font-size:clamp(38px,6vw,76px)}
h2{font-size:clamp(28px,4vw,44px)}
h3{font-size:clamp(20px,2.4vw,26px);line-height:1.25}
p{max-width:34em}
strong,b{font-weight:600}
:focus-visible{outline:2px solid var(--amber);outline-offset:3px;border-radius:4px}

/* ---------- layout primitives ---------- */
.shell{width:100%;max-width:var(--shell-max);margin-inline:auto;padding-inline:var(--shell-pad)}
.shell--wide{max-width:1440px}
.section{padding-block:clamp(44px,7vw,104px)}
.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(16px,2vw,28px)}
.col-3{grid-column:span 3}
.col-4{grid-column:span 4}
.col-5{grid-column:span 5}
.col-6{grid-column:span 6}
.col-7{grid-column:span 7}
.col-8{grid-column:span 8}
.col-9{grid-column:span 9}
.col-12{grid-column:span 12}
.band{height:4px;border:0;margin:0;background:linear-gradient(90deg,var(--teal) 0%,var(--teal-soft) 28%,var(--amber) 58%,var(--orange) 82%,var(--indigo) 100%)}

/* ---------- text helpers ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:12px;font-weight:600;letter-spacing:.34em;color:var(--teal);
}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--amber)}
.v-note{
  writing-mode:vertical-rl;
  font-size:11px;font-weight:600;letter-spacing:.35em;
  color:rgba(255,255,255,.55);
}
.v-note--dark{color:rgba(18,33,43,.45)}
.mono,.data{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.04em}
.data{font-weight:500}

/* ---------- surfaces ---------- */
.surface{background:#fff;color:var(--text);padding:clamp(20px,3vw,34px)}
.glass{
  background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.22);
  border-radius:var(--r-m);
  -webkit-backdrop-filter:blur(14px) saturate(150%);
  backdrop-filter:blur(14px) saturate(150%);
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  min-height:48px;padding:0 24px;border-radius:999px;
  border:1px solid transparent;
  font-size:16px;font-weight:600;letter-spacing:.02em;text-align:center;
  transition:transform .18s var(--ease),background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn--primary{background:var(--orange);color:#fff;box-shadow:0 12px 26px rgba(228,80,42,.32)}
.btn--primary:hover{background:#C9411F}
.btn--teal{background:var(--teal);color:#fff}
.btn--teal:hover{background:#0B5E55}
.btn--amber{background:var(--amber);color:#3A2402}
.btn--ghost{background:transparent;border-color:currentColor;color:inherit}
.btn--ghost:hover{background:rgba(255,255,255,.1)}
.btn--sm{min-height:44px;padding:0 18px;font-size:14.5px}

/* ---------- breadcrumbs ---------- */
.crumbs{font-size:13.5px;color:#5A6E74}
.crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumbs li{display:flex;align-items:center;gap:8px}
.crumbs li+li::before{content:"";width:14px;height:1px;background:currentColor;opacity:.5}
.crumbs a{color:var(--teal)}
.crumbs a:hover{color:var(--orange)}
.crumbs [aria-current="page"]{color:var(--text);font-weight:600}

/* ---------- media frame ---------- */
.media-frame{
  position:relative;overflow:hidden;isolation:isolate;
  aspect-ratio:16/9;
  background:linear-gradient(140deg,var(--ink),var(--teal) 48%,var(--indigo));
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(118deg,rgba(11,27,38,.55) 0%,rgba(11,27,38,0) 46%,rgba(228,80,42,.34) 100%);
}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--cut{clip-path:polygon(0 0,100% 0,100% 93%,0 100%)}
.media-frame__caption{
  position:absolute;z-index:2;left:0;right:0;bottom:0;
  padding:14px 18px;font-size:13px;letter-spacing:.04em;
  color:rgba(255,255,255,.86);
  background:linear-gradient(0deg,rgba(11,27,38,.78),rgba(11,27,38,0));
}

/* ---------- reveal / progress ---------- */
.js [data-reveal]{opacity:0;transform:translate3d(0,24px,0);transition:opacity .42s var(--ease),transform .42s var(--ease)}
.js [data-reveal].is-in{opacity:1;transform:none}
.scroll-progress{
  position:fixed;top:0;left:0;right:0;height:3px;z-index:95;pointer-events:none;
  background:linear-gradient(90deg,var(--teal-soft),var(--amber) 55%,var(--orange));
  transform:scaleX(var(--progress,0));transform-origin:0 50%;
  transition:transform .1s linear;
}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:120;
  padding:12px 18px;border-radius:10px;
  background:var(--amber);color:#3A2402;font-weight:700;font-size:15px;
  transform:translateY(-180%);
  transition:transform .2s var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{transform:translateY(0)}

/* ==========================================================================
   HEADER
   ========================================================================== */
.site-header{
  position:fixed;inset:0 0 auto 0;z-index:80;
  color:#fff;
  background:linear-gradient(180deg,rgba(11,27,38,.86) 0%,rgba(11,27,38,.34) 62%,rgba(11,27,38,0) 100%);
  transition:background .3s var(--ease),box-shadow .3s var(--ease);
}
.site-header.is-solid{
  background:linear-gradient(100deg,#0E6E63 0%,#0C5F57 68%,#0B4A4A 100%);
  box-shadow:0 14px 34px rgba(11,27,38,.34);
}
.header-inner{
  display:grid;grid-template-columns:auto 1fr auto;align-items:center;
  gap:clamp(12px,2vw,32px);
  width:100%;max-width:1440px;margin-inline:auto;
  min-height:var(--header-h);
  padding-inline:var(--shell-pad);
}

/* brand */
.brand{display:inline-flex;align-items:center;gap:12px;min-height:56px;color:#fff}
.brand__mark{
  display:grid;place-items:center;width:44px;height:44px;border-radius:12px;
  color:#8FE6DA;
  background:linear-gradient(150deg,rgba(47,167,154,.38),rgba(255,255,255,.06));
  border:1px solid rgba(255,255,255,.22);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.26);
}
.brand__mark svg{width:26px;height:26px}
.brand__text{display:flex;flex-direction:column;gap:2px;line-height:1.05}
.brand__name{font-size:21px;font-weight:900;letter-spacing:-.01em}
.brand__sub{font-family:var(--font-mono);font-size:9px;letter-spacing:.28em;color:rgba(255,255,255,.55)}

/* nav */
.site-nav{justify-self:center;min-width:0}
.nav-list{display:flex;align-items:center;gap:clamp(2px,1.4vw,24px)}
.nav-item{position:relative}
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  min-height:44px;padding:10px 6px;
  font-size:17px;font-weight:500;letter-spacing:.01em;
  color:#fff;opacity:.86;
  transition:opacity .2s var(--ease),color .2s var(--ease);
}
.nav-link:hover,.nav-link:focus-visible{opacity:1}
.nav-link::after{
  content:"";position:absolute;left:6px;right:6px;bottom:4px;height:2px;border-radius:2px;
  background:var(--amber);transform:scaleX(0);transform-origin:0 50%;
  transition:transform .24s var(--ease);
}
.nav-link:hover::after,.nav-link:focus-visible::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{opacity:1;font-weight:700}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}

.nav-caret{
  width:6px;height:6px;margin-left:8px;
  border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;
  transform:rotate(45deg) translateY(-2px);
  transition:transform .22s var(--ease);
}
.nav-item--has-sub:hover .nav-caret,
.nav-item--has-sub:focus-within .nav-caret{transform:rotate(225deg) translateY(2px)}

.nav-sub{
  position:absolute;top:calc(100% + 4px);left:50%;
  width:226px;padding:16px;
  transform:translate(-50%,8px);
  background:rgba(11,27,38,.88);
  border:1px solid rgba(255,255,255,.16);
  border-radius:var(--r-m);
  box-shadow:var(--shadow-2);
  -webkit-backdrop-filter:blur(14px) saturate(150%);
  backdrop-filter:blur(14px) saturate(150%);
  opacity:0;visibility:hidden;
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s;
}
.nav-item--has-sub:hover .nav-sub,
.nav-item--has-sub:focus-within .nav-sub{opacity:1;visibility:visible;transform:translate(-50%,0)}
.nav-sub__label{
  margin-bottom:10px;font-size:11px;font-weight:600;letter-spacing:.3em;
  color:var(--amber);
}
.nav-sub a{
  display:block;padding:9px 10px;border-radius:var(--r-s);
  font-size:15px;color:rgba(255,255,255,.84);
  transition:background .18s var(--ease),color .18s var(--ease);
}
.nav-sub a:hover,.nav-sub a:focus-visible{background:rgba(255,255,255,.1);color:#fff}

/* actions */
.header-actions{position:relative;z-index:92;display:flex;align-items:center;gap:10px}
.member-capsule{
  position:relative;display:inline-flex;align-items:center;gap:9px;
  min-height:56px;padding:0 22px;border-radius:999px;
  background:rgba(255,255,255,.09);
  border:1px solid rgba(255,255,255,.3);
  -webkit-backdrop-filter:blur(14px) saturate(150%);
  backdrop-filter:blur(14px) saturate(150%);
  font-size:15px;font-weight:600;letter-spacing:.06em;color:#fff;
  transition:background .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.member-capsule:hover,.member-capsule:focus-visible{
  background:rgba(255,255,255,.16);border-color:rgba(242,166,59,.7);transform:translateY(-1px);
}
.member-capsule__dot{
  width:8px;height:8px;border-radius:50%;background:var(--amber);
  box-shadow:0 0 0 4px rgba(242,166,59,.22);
}
.member-capsule__hint{
  position:absolute;top:calc(100% + 12px);right:0;
  padding:9px 13px;border-radius:10px;white-space:nowrap;
  font-size:13px;font-weight:500;letter-spacing:.04em;
  color:var(--amber);
  background:rgba(11,27,38,.92);
  border:1px solid rgba(242,166,59,.42);
  box-shadow:var(--shadow-1);
  opacity:0;visibility:hidden;transform:translateY(-4px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s;
}
.member-capsule:hover .member-capsule__hint,
.member-capsule:focus-visible .member-capsule__hint{opacity:1;visibility:visible;transform:none}

.nav-toggle{
  display:none;align-items:center;gap:9px;
  min-height:48px;padding:0 16px;border-radius:999px;
  background:rgba(255,255,255,.09);
  border:1px solid rgba(255,255,255,.28);
  font-size:14px;font-weight:600;letter-spacing:.08em;color:#fff;
}
.nav-toggle__bars{position:relative;display:block;width:18px;height:12px}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:18px;height:2px;border-radius:2px;
  background:currentColor;transition:transform .22s var(--ease),top .22s var(--ease),bottom .22s var(--ease);
}
.nav-toggle__bars::before{top:0}
.nav-toggle__bars::after{bottom:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{top:5px;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{bottom:5px;transform:rotate(-45deg)}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer{
  position:relative;overflow:hidden;
  margin-top:0;padding-bottom:26px;
  color:rgba(255,255,255,.78);
  background:linear-gradient(158deg,#0B1B26 0%,#0F2430 44%,#241726 78%,#0B1B26 100%);
}
.site-footer::before{
  content:"";position:absolute;top:-260px;right:-160px;width:560px;height:560px;border-radius:50%;
  background:radial-gradient(circle,rgba(14,110,99,.55),rgba(14,110,99,0) 68%);
  pointer-events:none;
}
.site-footer::after{
  content:"";position:absolute;bottom:-220px;left:-140px;width:480px;height:480px;border-radius:50%;
  background:radial-gradient(circle,rgba(92,31,51,.5),rgba(92,31,51,0) 70%);
  pointer-events:none;
}
.footer-band{height:4px;background:linear-gradient(90deg,#0E6E63,#2FA79A 28%,#F2A63B 58%,#E4502A 82%,#23306B)}
.footer-shell{position:relative;z-index:1;padding-top:clamp(36px,5vw,64px)}
.footer-grid{display:grid;grid-template-columns:1.45fr 1fr 1fr 1.5fr;gap:clamp(24px,3vw,48px)}
.footer-col{min-width:0}
.footer-brand{
  font-size:26px;font-weight:900;letter-spacing:-.02em;color:#fff;
  display:inline-flex;align-items:center;gap:12px;
}
.footer-brand::before{content:"";width:4px;height:26px;border-radius:2px;background:linear-gradient(180deg,var(--teal-soft),var(--orange))}
.footer-tag{margin-top:12px;font-size:15px;line-height:1.75;color:rgba(255,255,255,.7);max-width:30ch}
.footer-icp{margin-top:16px;font-size:13px;letter-spacing:.04em;color:rgba(255,255,255,.55)}
.footer-title{
  margin-bottom:14px;font-size:12px;font-weight:600;letter-spacing:.3em;
  color:var(--amber);line-height:1.4;
}
.footer-list li+li{margin-top:10px}
.footer-list a{
  display:inline-block;font-size:15px;color:rgba(255,255,255,.78);
  transition:color .18s var(--ease);
}
.footer-list a:hover,.footer-list a:focus-visible{color:#fff;text-decoration:underline;text-underline-offset:4px;text-decoration-color:var(--amber)}
.footer-list--contact li{margin-bottom:12px;font-size:14.5px;color:rgba(255,255,255,.82);line-height:1.6;overflow-wrap:anywhere}
.footer-note{margin-top:4px;font-size:12.5px;line-height:1.7;color:rgba(255,255,255,.5);max-width:36ch}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:14px 24px;margin-top:clamp(28px,4vw,46px);padding-top:20px;
  border-top:1px solid rgba(255,255,255,.14);
  font-size:13px;color:rgba(255,255,255,.6);
}
.footer-copy{margin:0;max-width:none}
.footer-bottom__links{display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px}
.footer-bottom a{color:rgba(255,255,255,.72);transition:color .18s var(--ease)}
.footer-bottom a:hover,.footer-bottom a:focus-visible{color:var(--amber)}
.to-top{
  display:inline-flex;align-items:center;gap:8px;
  min-height:44px;padding:0 18px;border-radius:999px;
  border:1px solid rgba(255,255,255,.24);
  background:rgba(255,255,255,.06);
  font-size:13.5px;letter-spacing:.06em;color:rgba(255,255,255,.85);
  opacity:0;visibility:hidden;
  transition:opacity .24s var(--ease),visibility .24s,background .2s var(--ease);
}
.to-top:hover,.to-top:focus-visible{background:rgba(255,255,255,.14)}
.to-top.is-visible{opacity:1;visibility:visible}

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width:1024px){
  .header-inner{min-height:70px;grid-template-columns:1fr auto;gap:10px}
  .nav-toggle{display:inline-flex}

  .site-nav{
    position:fixed;inset:0;z-index:85;
    display:flex;flex-direction:column;justify-content:center;
    padding:112px var(--shell-pad) 56px;
    overflow-y:auto;
    background:linear-gradient(158deg,rgba(11,27,38,.985) 0%,rgba(14,110,99,.96) 52%,rgba(35,48,107,.97) 100%);
    clip-path:polygon(0 0,100% 0,100% 100%,0 93%);
    opacity:0;visibility:hidden;transform:translateY(-14px);
    transition:opacity .26s var(--ease),transform .26s var(--ease),visibility .26s;
  }
  .site-nav[data-open]{opacity:1;visibility:visible;transform:none}

  .nav-list{flex-direction:column;align-items:stretch;gap:0;width:100%;max-width:560px;margin-inline:auto}
  .nav-link{
    width:100%;font-size:clamp(22px,5vw,28px);font-weight:800;letter-spacing:-.01em;
    padding:16px 2px;opacity:1;
    border-bottom:1px solid rgba(255,255,255,.12);
  }
  .nav-link::after{display:none}
  .nav-link[aria-current="page"]{color:var(--amber)}
  .nav-caret{width:8px;height:8px;margin-left:auto}

  .nav-item--has-sub .nav-sub{
    position:static;width:auto;margin:12px 0 16px;padding:0;
    transform:none;opacity:1;visibility:visible;
    background:none;border:0;box-shadow:none;
    -webkit-backdrop-filter:none;backdrop-filter:none;
  }
  .nav-sub__label{margin-bottom:8px;font-size:10px;letter-spacing:.3em}
  .nav-sub ul{display:flex;flex-wrap:wrap;gap:8px}
  .nav-sub a{
    padding:8px 14px;border:1px solid rgba(255,255,255,.26);border-radius:999px;
    font-size:14px;color:rgba(255,255,255,.88);
  }

  .member-capsule{min-height:48px;padding:0 16px;font-size:14px;gap:7px}
  .member-capsule__hint{display:none}
  .brand__name{font-size:19px}

  .footer-grid{grid-template-columns:1fr 1fr;gap:clamp(24px,4vw,40px)}
  .grid-12{grid-template-columns:repeat(12,minmax(0,1fr))}
  .col-3,.col-4,.col-5{grid-column:span 6}
  .col-7,.col-8,.col-9{grid-column:span 12}
}

@media (max-width:620px){
  body{font-size:16px}
  .brand__sub{display:none}
  .brand__mark{width:40px;height:40px}
  .header-inner{min-height:64px}
  .nav-toggle{padding:0 14px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .col-3,.col-4,.col-5,.col-6,.col-7,.col-8,.col-9,.col-12{grid-column:1/-1}
  .media-frame--wide{aspect-ratio:16/10}
  .btn{width:100%;padding:0 20px}
}

/* ---------- reduced motion ---------- */
@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}
  .scroll-progress{transition:none}
  .site-header.is-solid{box-shadow:none}
}